Choose a CRT TV. History of TVs Which brand of CRT TV is better to buy
In 2014, the production of television receivers with cathode ray tubes ceased. Today you will no longer be able to find CRT TVs with a diagonal of 21 inches or higher. There are still models with a screen diagonal of 14 inches and smaller. The time of CRT TVs has passed, and today mostly all manufacturers produce LED TVs.
A television that is used to display images on the screen cathode ray tube (CRT) is also CRT (Cathode Ray Tube), and is called a CRT or CRT TV. The kinescope contains three cathode guns (red, green, blue), which fire (analogy with guns) a screen covered with phosphor, causing a glow. The work of a CRT TV is aimed at controlling these guns. And the perfection of the picture that we see depends on the quality of the picture tube and the quality of the control circuit. Therefore, when choosing a CRT TV, you need to look at the class of the kinescope and the availability of circuit solutions to improve quality (filters, amplifiers, etc.).
Traditional CRT TVs have been on the market longer than others, so manufacturers have already developed the technology almost to perfection and thanks to this you can choose a reliable, well-displaying, durable TV. If you will use it to watch mainly TV shows and want to save a little money, then you need to choose a CRT TV. It will serve you for more than ten years and such TVs are easier to repair than others.
Appearance of a kinescope television receiver
How to choose a CRT TV based on characteristics
The main disadvantages of CRT TVs are:
- geometric distortion(for modern TVs in the high price range they are almost invisible, especially with flat picture tubes);
- beam convergence problem(for high-priced TVs they are almost invisible);
- big sizes(in depth, different thickness) than LCD and plasma (if there is space for installation, then you can ignore it);
- exposure to magnetic fields(just don’t place speakers or other sources of magnetic fields closer than 1 meter);
- screen size limit(up to 38 inches), for a small room a diagonal of 90 centimeters is quite enough;
- harmful effects on humans due to radiation(thanks to modern technologies managed to reduce the CRT so much that you can ignore it);
100 Hz scanning in CRT TVs
Another disadvantage of a CRT TV is screen flickering. Due to the introduction of 100 Hz technology, this flicker is almost eliminated. Then the picture will be stable, which will be especially noticeable when reading small letters, and accordingly the eyes will get less tired. With this method, the signal is received from the air with a frequency of 50 Hz, but in a 100 Hz CRT TV, frames are remembered and played back twice in the time that regular TV goes to play one frame. But there are also disadvantages to this method. In fast scenes, trails will be noticeable, steps will be visible at the boundaries of transitions, and jitter will be noticeable at the edges of the screen. To eliminate these shortcomings, CRT TVs use various circuit solutions. Using 1-2-1-2 frame alternation eliminates picture jitter.
Digital filters, suppressing noise, reduce the loop. Creating intermediate frames inserted between working frames further improves the picture, making transitions more natural.
Therefore, do not rush to choose a CRT TV with 100 Hz scanning. Look at the picture when the scene changes quickly (sports, racing) and then make a decision. CRT TV sound.
If you are not going to buy an additional audio system, but want to listen to high-quality sound, then pay attention to the presence of built-in decoding processors
Dolby sound in CRT TV
When buying an expensive crt model, pay attention to the presence of the “picture in picture” and “picture and picture” functions, which allow you to watch two channels at once on one screen. There is also a function for viewing still images from different channels. Picture tube parameters When choosing
diagonals for CRT TV you need to measure the distance from which you will watch TV and divide by 5. This value will be the diagonal in centimeters (the distance is also in centimeters). With this size, it will be comfortable to watch TV; you won’t see the graininess of the picture and you won’t have to strain your eyesight to see small objects. When choosing a 3x4 or 16x9 format
you need to know what you are going to watch. If you watch a lot of DVDs with widescreen films, then you need to pay attention to the 16x9 format. If you are only going to watch terrestrial television than convex.
A flat picture tube has less distortion and a better picture, with less glare from other light sources. But if you watch little TV (dacha, kitchen), then this is not so important. And yet, TVs with flat picture tubes are more expensive.
It's no secret that every year more and more market participants (both manufacturers and consumers) are interested in “flat panel” TVs. Firms are actively transferring intellectual resources and production capacity to the creation of liquid crystal and plasma TV. An increase in the production volume of these High Tech models leads to a decrease in cost, and the circle of potential buyers gradually expands... This is how the flywheel of the “product-money-product” process spins up. This situation could not but affect the situation with traditional picture tube (CRT) televisions. Now CRT models of small (14–21") and medium (25–29") diagonals are competitive due to price. And what about elite TVs with a diagonal of 32–36"? Here the question of choice becomes menacingly categorical. 36 inches is practically the limit for CRT technology. Such devices essentially represent the High End sector of the television world, and in terms of money they are not much different from flat screens PDP and LCD panels (diagonal 32–42 inches) from the lower price category. The TV giants also have another competitor that has claimed the main role in the home cinema - video projectors for $2000–3000 already offer projectors that satisfy the demands of the discerning. movie buffs (see test in September S&V, 2003). However, let’s not forget that top-class CRT televisions are the pinnacle of technological achievements; they contain experience that has been honed by development companies for decades. There are plenty of rationalists among buyers who are not. those who are inclined to invest money in newly created technologies (plasma and crystals are in development); not every consumer is ready to put up with limitations (the projector requires darkening the room). And so many of us are asking the question: what is the potential of large-format CRT televisions, do these giants have the reserves of strength to fight for existence in the era of total miniaturization?
In the current test there are few models, and all are from companies that support the production of 36-inch TVs. In passing, we note that equipment of such a serious level is produced only by the grandees of the AV industry. Let's try to determine the common features of the current participants. Apart from the weight, which reaches 100 kilograms, the main feature is the digital chassis and systems used in the fight for image quality. This is important, because even minor flaws in the picture become noticeable on a meter-long screen. When receiving television broadcasts, digital video signal processing improves quality (for example, a digital comb filter helps separate luminance and color signals). Through the use of digital filtering, effective reduction of color noise is achieved. If the video input of the TV receives a component signal (divided into luminance and color difference components), for example, from a DVD player, with a minimum noise level, then in this case, digital algorithms are tasked with the extremely difficult task of correcting what is seemingly impossible to fix , - flicker of 50-Hz scan and line structure of the image. Increasing the frame rate (the notorious “100 Hz”) or converting interlace to progressive helps out. In addition, depending on the quality and format of the image, different processing algorithms are often required (modern devices have different modes). All this ultimately makes up the portrait of a high-end large-screen TV. However, it’s time to take a closer look at this portrait screen...
Philips 36PW9618
Perhaps, main feature Model 36PW9618/58, what makes it stand out from other test participants is its self-sufficiency: a representative of the elite MatchLine series is, in essence, a very attractive solution for a home theater, so to speak, “all in one”. The only thing missing for a complete set is a DVD player...
The control buttons located on the top panel are convenient and easily accessible (a solution that has become the hallmark of the company's top models). Universal remote The remote control is capable of controlling five devices of the AV complex. Graphical interface Compass GUI is very ergonomic and, one might say, simply elegant. For example, when setting up a region, a map of Europe appears on the screen, and a dot points to Russia. Additional front connectors are hidden in a deep niche on the side panel, which creates some difficulties when you need to quickly connect, for example, a video camera. The status of an elite model is emphasized by a range of digital image processing technologies. The user can choose the digital algorithm for viewing a specific program: Pixel Plus, 100 Hz Digital Scan or line doubling (progressive scan). I liked the way the Active Control system works - adjusting image parameters depending on ambient lighting conditions. In our opinion, its presence is especially important for theatrical TV. When switching from watching TV programs to showing movies from a DVD or satellite tuner, it would be a good idea to apply some dimming - in this case, Active Control will quickly and accurately reconfigure the entire set of image parameters.
According to the measurements, which are in good agreement with the viewing experience, the model has excellent performance in terms of image clarity and brightness; The detail of the picture is excellent. The device demonstrates its “pictorial” capabilities most effectively in landscape scenes, when the sun-filled space acquires volume and captivates with realism. However, if in bright scenes the color shades are quite natural, then in fragments with low color saturation blue-green tones begin to predominate (at a low brightness level, the color temperature increases; see measurement results). The image from the DVD is distinguished by bright, rich, sometimes overly saturated colors. The presence of digital noise slightly reduces the visual impression. Enumerating digital correction modes, if it improves the situation, does so only slightly.
The soundtrack is characterized by a large reserve of power. The developers tried to focus on the mid-frequency range to increase speech intelligibility.
Rich Features digital processing images, a set of theater decoders, amplifiers and acoustics, as well as convenient controls will be appreciated by supporters of integrated solutions when building a home theater.
Measurements
Color gamut chart
Technical Note
Excellent brightness and color clarity (500 and 150 TVL). The contrast was 32:1. The color gamut is narrowed on the red and green side, while the color temperature of the saturated white field turned out to be equal to 8150K. The color temperature value in fragments of low and medium brightness is overestimated and is about 9000K. The brightness uniformity is not the highest, the relative spread was 57%. The brightness response does not correspond to linear behavior only in the darkest fragments. Color uniformity is one of the best in the test - the difference across the screen field is only 750K. The tuner sensitivity is sufficient for urban reception conditions (–45/–65 dB).
Samsung WS-36Z4HFQ
The design of one of the largest representatives of the Plano model range from Samsung, along with corporate traditions, also carries individual features - the screen is enclosed in an elegant frame, visually distinguishing it from the background of the front panel. Front AV connectors are conveniently located on the side console. We also note the VGA input, which allows you to use the TV as a giant monitor.
Full access to TV control is possible only from the remote control; Using the buttons on the front panel, you can only enter the local menu and adjust the basic image parameters: brightness, contrast, color saturation; adjust the volume of speakers and headphones.
The presence of digital video signal processing systems Digital ProPicture and Total DSP System allows you to significantly adjust the image quality. The TV produces the most saturated, natural and devoid of “jagged” inclined lines image in the Progressive mode, however, in this case the flickering of the frame scan becomes noticeable. Among design features- a rich set of connectors: in addition to the VGA input, there are three SCARTs (with RGB and S-Video inputs), an input for color difference component signals, connectors for connecting external acoustics and linear audio outputs of the Dolby Pro Logic decoder. The basis of the functional set is digital image processing modes, five gradations of color temperature, image and sound presets, six format adaptation modes, freeze frame, PIP and Multi PIP.
The conclusion that can be drawn based on a multifaceted assessment of image quality is that it is almost always possible to achieve realistic color reproduction by adjusting color saturation and selecting color temperature profiles. At the same time, a colossal reserve of brightness and one of the highest contrast values give the image volume and detail. The situation with noise is somewhat worse: on broadcast programs with a weakened signal level in SECAM, a small color noise is noticeable. When watching video material from DVD, the image is distinguished by good dynamics and rich color shades, and the minimal level of digital artifacts in dynamic fragments adds realism.
The sound picture has a distinct spatial organization, and the bass is well developed. However, there is some harshness at high frequencies, especially at high volumes (apparently due to increased distortion levels).
With moderate Samsung price The WS-36Z4HFQ attracts with its rich picture, functionality and good quality design.
Measurements
Color gamut chart
Technical Note
The TV showed good results in terms of brightness and color clarity - 490 and 140 TVL. The image contrast is one of the highest in the test, 52:1. The color gamut is slightly narrowed on the green side and slightly narrowed in the red area. The device has excellent color uniformity (the spread was only 400K), however average level turned out to be below the reference value (about 4200K). The brightness uniformity is average - the relative spread was 48%. Color uniformity is good, the difference between the maximum and minimum color temperature across the screen field was 1110K. The tuner sensitivity is one of the highest in the test (–60/–65 dB).
Sony KV-36HQ100K
Measurements
Color gamut chart
Technical Note
Brightness clarity turned out to be the highest in the test - 510 TVL, while color clarity was average - 120 TVL. The picture contrast of 1:60 is the best in the test. The color gamut is slightly distorted in the red region, but the white coordinates are close to the reference ones. The color temperature in dark areas varies over a wide range from 2000 to 8000K, and in medium and light areas, on the contrary, it is constant. Moreover, the average value for all shades of gray is very close to the reference value - 6700K. Brightness uniformity is not great - the relative difference was 72%. Color uniformity is also not record-breaking - the spread turned out to be 2380K. The tuner pleased with its sensitivity: –58/–65 dB.
How to choose a CRT TV? ">
1. Screen size.
The first thing you need to decide on when choosing a TV is what screen size is optimal for your room. You shouldn’t immediately focus on the large diagonal, as it will be very uncomfortable to watch in a small room. The diagonal size of the TV is indicated in inches, less often in centimeters (domestic TV models). The very name of the TV model contains a reference to the size of its diagonal (for example: Sony KV-29CL10K TV – 29” diagonal). TVs have standard screen sizes. The most common: 14” (37 cm), 20” (51 cm), 21” (54 cm), 25” (63 cm), 29” (72 cm), 32” (81 cm), 34” (87 cm), 36” (92 cm). As the diagonal of the TV increases, its overall dimensions also increase. The depth of televisions with a small diagonal, as a rule, is no less than their diagonal (14” - 27 cm), and for televisions of medium and large diagonals the depth is 47-60 cm. The optimal distance from your place from which you watch TV programs to the screen when watching A 4:3 TV (standard aspect ratio) is 3 to 5 screen diagonals. At the same time, a distance of 3 diagonals is acceptable for 4:3 format TVs with a 100 Hz scan and additional image processing systems, which greatly reduces screen flickering and, accordingly, minimizes eye strain. For 16:9 widescreen TVs, the recommended viewing distance is 2.5-3 screen diagonals. If you are going to put the TV in a niche, you must take into account that there must be a distance between the walls of the niche and the TV body to ensure free air circulation.
TVs 14”-15”. A very large family of televisions. In terms of image quality and functionality are very similar to each other, however, more well-known companies, as a rule, equip their TVs with higher-quality components and picture tubes. Therefore, when choosing, first of all, you should pay attention to the design you like, whether this TV has a flat or convex kinescope, the presence of one or two speakers and teletext. Manufacturers can equip them with an indoor antenna, however, the quality of reception with such an antenna is extremely low.
TVs 20”-21”. The most numerous group of televisions. Almost every manufacturer offers a wide selection of TV models of this diagonal, both with a conventional convex and flat screen. Functionally, TVs of this diagonal do not differ much. When choosing, you need to pay attention to the design, the presence of teletext, and the number of speakers. Some TV models have stereo sound and balance adjustment. Most manufacturers consider 20"-21" and large diagonal TVs as stationary and do not equip them with their own antenna, assuming that a cable one will be used.
TVs 25”. They are not in great demand in our country. These TVs vary greatly in their functionality, the presence or absence of stereo sound, and design. The price of these TVs is significantly higher than 21” TVs. Besides, in model range TVs of this diagonal have models with a scan rate of 100 Hz (relevant for CRT TVs). Their cost is often higher than that of 29-inch models with 50 Hz scan. Although these TVs have high-quality stable images, good functionality and stereo sound, they typically lack digital processors to improve picture quality, which prevents them from truly competing with 29-inch TVs in terms of picture quality.
TVs 29" and higher. These TVs have a huge range in their functionality and technical characteristics, many are equipped with digital image processors and 100 Hz scanning, as well as additional speakers to enhance the bass (which still does not make their audio system full-fledged for watching DVDs). In addition, when choosing large diagonal TVs, it is important to appearance. Some companies complete their TVs with bedside tables (or supply them additionally).
2. Technologies.
100 Hz technology.
Which is better, 50 or 100 Hz sweep?
According to the current television broadcasting standard, the picture is transmitted in 2 stages: in two half-frames, through a line - first all odd lines, and in the second stage - all even lines. This is called interlaced scanning. Half-frames are transmitted at a frequency of 50 Hz.
Main disadvantages: the “flickering” effect (the human eye notices this flickering frequency) when displaying an image on the screen, in addition, horizontal lines “shake” with a frequency of 25 Hz. This is especially noticeable on a white background and on a large screen.
100 Hz technology. – this is a digital technology that ensures that the screen is updated 2 times more often than with 50 Hz technology, i.e. "half-frames" appear 2 times more often. A video signal presented in digital form provides much greater processing capabilities than an analogue one. For example, you can remember a digitally represented frame of an image and play it back at the right time. This technology allows you to solve the problem of flickering images on the screen. The fact is that with a half-frame (field) changing frequency of 50 (60) Hz, image flickering, especially in bright areas, still remains noticeable.
However, this system is also not without drawbacks: when alternating half-frames first - first - second - second, the transition from odd to even lines occurs with the same frequency of 50 Hz. This is manifested in the shaking of the upper and lower edges of the image details due to the alternation of even and odd lines.
This drawback can be overcome by an improved system called Digital Scan, in which half-frames alternate in the sequence first - second - first - second. In this case, the frequency of changing half-frames with even and odd lines is already 100 Hz, and jitter becomes almost unnoticeable.
In addition, 100 Hz technology has several disadvantages, including digitization of the image and digital loop when objects move quickly. To better convey rapidly changing images, 100 Hz TVs use special digital signal processing technologies, such as Digital Scan with Natural Motion (Philips), Digital Plus (Sony), Digital Mastering and Intelligent Mastering (Thomson), Digital Scan and Super Digital Scan (Panasonic), Full Digital with DMI (Digital Motion Interpolation) system (Loewe) and others. In these systems, using a special algorithm, an intermediate frame is created, which is inserted between the frames from which it is formed. As a result, fast-moving objects on the screen look more natural.
3. Image format.
Today there are two TV screen formats: the traditional, familiar to everyone, 4:3 and the widescreen 16:9 image format.
When choosing a TV format, you must decide what you will mainly watch: If you mainly watch TV shows on TV, watch MPEG4 (DivX) movies or a VCR, then you should buy a 4:3 TV, because its format coincides with the format of television broadcasting. However, when viewing a 16:9 image (for example, DVDs), there will be black bars at the top and bottom of the TV screen (which, most often, can be removed by “cutting off” the edges of the image).
If you are a DVD lover and want to spend your leisure time watching your favorite films, then it makes sense for you to buy a 16:9 TV. Because most DVDs on the market today contain images in 16:9 format. However, we note that television broadcasting in Ukraine does not use a wide format. When watching regular TV programs on a 16:9 TV, there will be unused, black areas at the edges of the screen, i.e. The "effective" diagonal of the image will decrease. On the other hand, such televisions usually provide for an increase in the image size to fill the entire screen, which results in the loss of the upper and lower parts of the image, which, as a rule, are not very informative for television programs. Many wide-screen TVs also use “smart” image enlargement, when the image fills the entire screen, distorting nonlinearly - the central part remains practically unchanged (and it is the most informative), and the periphery of the screen is distorted (the upper and lower parts may shrink slightly, and the side parts - to stretch). It looks strange at first, but then you get used to it.
By the way, widescreen images can be not only 16:9, there is also a fully cinematic format of 2.35:1. When watching DVDs marked "2.35:1", even on 16:9 screens there are black stripes at the top and bottom.
16:9 TVs provide especially great opportunities for creating a home cinema. The viewing angle increases significantly, the perfection of the image in combination with the appropriate audio design allows you to feel full involvement in the events on the screen. Note that the source of a wide-format image can be not only a DVD player: there are satellites that provide broadcasting in a wide format and even with multi-channel Dolby Digital sound.
4. TV sound and power.
When choosing a TV, you should decide what kind of TV you want to have. There are two types of TVs: with mono and stereo sound. In this case, the TV can reproduce stereo or only with external source or from the air (A2, NICAM) and from an external source. In addition, mono TVs come with one or two speakers. Mono TVs with two speakers imitate stereo sound, but do not separate it into two channels, like stereo. It should be remembered that domestic television broadcasting predominantly works in mono and in this case there will be no effect from stereo sound on the TV. TVs with stereo sound are usually equipped with a large number of additional sound settings.
A number of TVs have built-in surround decoders soundtrack Dolby Pro Logic and/or Dolby Digital. The TV set may include additional speakers, when connected, it is possible to realize 6-channel Dolby Digital sound and, by purchasing an additional DVD player, create a home theater. Nowadays there are even some satellite channels, which broadcast with 6-channel Dolby Digital sound. However, in most cases, the source of multi-channel sound is a DVD player. Many TVs are equipped with a Virtual Dolby system instead of Dolby Pro Logic decoders, which allows you to simulate surround sound using a regular stereo system.
Speaker power is an important indicator of the sound quality of a TV; it is measured in watts; the higher the power indicator, the better sound quality you can get.
However, no matter how good the sound of televisions is, it will still be inferior to the sound quality of a home theater system.
5. Additional features.
Quite often a situation arises when interesting programs are broadcast on several channels simultaneously, or, for example, while watching a movie on one channel, you are afraid of missing the beginning of the news or an interesting match on another. At such moments, you want the TV screen to be divided into several parts, which would display different channels. Digital technologies make this possible.
Television designers have developed a technology called Picture in Picture, or PIP for short. This technology allows you to display on the screen, against the background of the main channel, in a small rectangular window, any other channel of your choice, or an image received from an external video source (VCR, video camera, etc.). The soundtrack can be selected for both the main and additional programs. Usually, it is necessary to change the size of the additional picture and its location on the screen. It is also possible to exchange images between the main screen and an additional window by pressing one button on the remote control.
Even inexpensive TV models can be equipped with the simplest single-window PIP (passive PIP). In this case, one TV tuner is used, so in an additional window you can display only programs coming to the TV through a low-frequency input, for example from a VCR, camcorder or DVD. If you are viewing a recording played from a VCR on the main screen, you can follow one of the broadcast programs in a small window.
Possibilities the simplest system PIP can be expanded if you connect a VCR (or DVD recorder with a TV tuner) to the low-frequency input. In this case, you can additionally output broadcast programs coming through the VCR tuner. If you connect a satellite tuner to your TV, using PIP you can view satellite programs in an additional window.
More expensive TV models may include a PIP unit equipped with its own (second) tuner (active PIP). In this case, in an additional window, or windows, you can view any programs coming to the TV. Many of the TVs with two tuners allow you to simultaneously display 3 - 9, and in widescreen TVs, even 16 windows, with various programs(Multi PIP, Multi Window EX systems and others). Widescreen TVs with a 16:9 screen format can implement the POP (Picture Out of Picture) mode. In this mode, three additional images are included in the free part of the wide screen on the side of the main 4:3 picture, together with it completely filling the TV screen area. PAP (Picture and Picture) The screen is divided into two parts, each containing a slightly compressed active image.
PAT (Picture and Text) The screen is divided into two parts: a slightly compressed active image and a full page of text.
6. Connectors for connecting external devices
. If you want to watch videos on your TV from external devices, many questions arise at once. When choosing a TV, it is very important to keep in mind in advance all the devices that you will want to connect to it, not only now, but also in the future, and make sure that your TV is equipped with a sufficient number of necessary connectors. Otherwise, you will only have to regret the wrong choice.
However, TVs have many different connectors, and not everyone can understand them. The user of a TV equipped with every conceivable connector will be faced with another problem - choosing the most correct and best one from the many connection options through these connectors.
The most common (but not the best) standard for connecting additional devices to the TV is a composite signal (RCA, Cinch, "tulip"). It represents the combination of all components containing video information into one signal. It is the composite signal that is obtained at the output of the television tuner (i.e., the receiver of the terrestrial television signal). VCRs, camcorders, DVD players, etc. are equipped with composite video outputs. In fact, it is difficult to find a device that does not have these outputs. The advantages of the composite method are clear - combining signals allows you to obtain the most capacious and convenient signal for transmission, which requires only one wire. However, when the original RGB or component signal is converted to a composite signal, some of the information is lost, and when the TV subsequently converts the composite signal back to RGB, the information cannot be restored. As a result, the resulting image is somewhat worse in quality (although this is not noticeable for small-diagonal TVs). On the other hand, if you are not going to connect a component signal source device (DVD player, etc.) to your TV or your TV is not equipped with a picture tube above 21”, this circumstance should not worry you, and composite connectors will be quite sufficient. The composite connector is made in the form of RCA, and is usually adjacent to the audio connector (one if it is mono, and two if it is a stereo TV). Traditionally, they are indicated together - RCA audio/video. The TV may be equipped with an RCA audio/video input and an RCA audio/video output.
A color image is formed from the primary color signals R G B, that is, the red R, green G and blue B signals, based on the color and brightness data of each point in the image. If you are going to connect to a TV external device, which has an RGB output signal, will correctly use the RGB input on the TV - this is a convenient way to ensure high-quality signal transmission. On TVs, the RGB input is usually implemented via a SCART connector. The high quality of connecting devices via the RGB input is quite comparable to another connection option - through the component input, which TVs can be equipped with.
Component signals are usually called a combination of a brightness signal (the “Y” component) and color-difference signals indicating the amount of color (the blue component “Pb” and the red component “Pr”). Various digital program sources can be connected to the TV via the component input and RGB: DVD player, digital satellite tuner, computer, decoders digital television, game console, etc. Connecting via the component input is optimal for a DVD player, since all information is on DVDs is contained in a component format, and the DVD player is the source of the component signal. Component connectors can be made with “tulips” (RCA) or bayonets (BNC), usually there are corresponding designations Y Pb Pr.
Another standard for connecting to a TV is S-Video (Separate Video, i.e., “separate video”). The S-video connection standard was developed when video players that were superior in quality to the over-the-air signal appeared on the market so that they could be seen as superior to TV programs on the TV screen. It's about, mainly about VCRs and video cameras of S-VHS, Hi8 standards, which use separate brightness and color channels for recording and playback; computer video cards may also contain such an output.
Very interesting is the universal SCART connector, which can allow you to connect signals at once: composite, RGB and stereo sound, and the connection is bidirectional. In addition, a control line is provided between the connected devices. Later versions of SCART provide for the connection of both S-Video and component signals, while the functions of transmitting a composite signal and RGB are limited - the number of pins in the SCART connector is limited. For S-Video and component connections, the TV must have 2 additional SCART connectors installed.
Connecting cables using a SCART connector may not be completely soldered - always check with the seller whether a particular cable will suit you or not.
The TV can also be equipped with separate RCA audio connectors. For example, the RCA audio output (R and L) of a TV allows you to connect to it a stereo system equipped with the appropriate inputs, and reproduce the TV sound through the stereo system, which significantly exceeds the sound power of the TV itself.
Some TVs are equipped with special VGA connectors, or D-Sub, allowing you to connect a computer to them and use them as monitors. However, it should be borne in mind that televisions are not designed to operate continuously for many hours, like monitors, and cannot replace them in this regard. Connecting a TV to a computer can be used, for example, for computer games and the like.
Please note that even if you have connected all cables correctly, collaboration connected devices may require additional adjustment of the TV inputs, the procedure for which in this case will be described in the operating instructions.
When choosing a TV, pay attention not only to the number of connectors (remember, there should be no less than the number of devices you want to connect), but also to the location of the connectors.
The connectors on the back of the TV are intended for permanent connection of equipment. It is advisable to have as many of them as the number of devices that will be permanently connected to the TV (plus one for the possibility of expanding the system). The connectors on the front (front) or side of the TV are intended for occasional and, as a rule, short-term connection of equipment (video cameras and game consoles). You should not consider them as an option for a permanent connection, since in most cases this is inconvenient and not very aesthetically pleasing.
When selecting equipment, we recommend that you try to ensure that the connectors are of the same type (for example, SCART on both the TV, DVD, and VCR), this will significantly simplify switching and eliminate the problems associated with finding specific cables, adapters, etc. .
7. Pros and cons of CRT TVs.
Advantages:
1. Low cost,
2. Technologies and circuitry developed to the limit,
3. A huge variety of CRT TV models,
4. High image quality,
5. The most natural color rendering,
6. Long service life (up to 15 years).
Flaws:
1. The size of the TV screen is technologically limited (about 38"),
2. Large dimensions and heavy weight of the device,
3. Problems - convergence of rays,
- geometric distortions,
- focusing.
4. Significant influence of magnetic fields on image quality and human health.
8. The most advanced manufacturing companies.
Philips, LG, Panasonic, Sony, Samsung
source of information www.pavleek.3dn.ru
Choosing a TV is by no means an easy matter, as it seems at first glance. And all because the modern electronics market is represented by a huge number of devices that differ not only in design, but also in functionality, technical parameters and cost. Today we will talk about what parameters you should pay attention to first. What types of TVs do modern manufacturers offer, what are their advantages and disadvantages?
Types of TVs
The difficulty of choosing a TV is easily explained, because currently the consumer is offered 4 types of devices - CRT, LCD, plasma panels, projection. And now about each in more detail.
CRT (CRT) TVs
This type of TV is the oldest and was especially popular about 15 years ago. However, even today most people purchase more advanced models of CRT TVs. CRT devices have a glass kinescope with a small screen size (36-38 inches diagonal).
Advantages:
- wide range of models;
- affordable price;
- high-quality image and natural color reproduction;
- the longest service life among all types of TVs – up to 18 years;
- low power consumption
Flaws:
- small screen size;
- large dimensions and impressive weight of the device;
- possibility of flickering during image transmission
CRT devices have three picture tube shapes: convex, flat and super flat.
LCD/liquid crystal (LCD) TVs
This type of TV is currently the most in demand and popular. What is the operating principle of LCD TV? The monitor of such devices consists of liquid crystals (hence, in fact, the name), which are illuminated from the inside by point light sources at different angles in such a way as to form 1 color out of 3 colors - green, red and blue. The viewing angle of the crystals is somewhat limited, which means that the image quality will depend on which side of the screen the viewer is on. The highest quality and most accurate image is transmitted if the viewer is located directly in front of the TV. TVs are equipped with a thin and flat screen, consuming a small amount of energy.
Advantages:
- light weight and small dimensions;
- high-quality and bright image;
- low energy consumption;
- no flicker;
Flaws:
- a small viewing angle, resulting in a change in the color and brightness of the image;
- possible pixel burnout;
- high price;
Plasma panels
Such devices are often used to equip a home theater. The basis of such televisions are cells filled with gas. When exposed to voltage, the color of the cells changes, as a result of which the desired image is formed and displayed. This technology allows for higher image brightness and contrast, and prevents glare and flicker. It is important to understand the fundamental difference between a plasma panel and a plasma TV. And it consists of the following: the panel works as a kind of projector that requires connection to an image transmission source - a DVD/CD player, video camera, PC or; and the TV is usually equipped with a built-in TV tuner, which receives the signal and converts it into an image.
Advantages:
- large screen sizes;
- no glare or flickering of the image;
- wide viewing angle;
- naturalness of the transmitted color
Flaws:
- high price;
- high level of energy consumption;
- possibility of pixel damage;
Projection TVs
This type of TV works on the principle of a projector, when the image is transmitted to the back or front surface of the screen. Such TVs are capable of transmitting high-quality images in a large format. Often, projection devices are equipped with screens whose size reaches 3 meters. There are two types of such TVs: translucent and reflective. The screen diagonal of transmissive projection televisions does not exceed 60 inches, while reflective projection devices are equipped with a screen with a diagonal of up to several meters, as indicated above.
Among other things, projection TVs are divided into three groups: those operating on picture tubes, on an LCD matrix, and on micromirrors.
Screen Format
At choosing a TV It is also important to take into account the screen format (the aspect ratio of the screen - height and width when transmitting an image). TV screens can be presented in two formats: traditional and wide.
Traditional format
This image format is represented by a 4:3 ratio and is the most familiar and widespread for most domestic TV channels.
Wide format
This format has a 16:9 ratio and is most suitable for watching movies, video clips, photos and home videos. Currently, wide-format image transmission is possible with analogue and satellite television, as well as playing video recordings from discs.
It is noteworthy that TVs with a traditional format are capable of reproducing a widescreen image that will stretch across the entire screen, with mandatory trimming with black stripes on the sides. The same applies to devices with a widescreen screen, which allows you to transmit an image in a traditional format, which will also be cropped, but only at the top and bottom.
So in this regard, decide for yourself which screen format is right for you.
Screen diagonal
In search of an answer to the question, - “which TV to choose”, it is worth deciding on such an important consumer characteristic as screen diagonal. At the same time, it is important to take into account all the details in the complex: the size of the living space, the arrangement of furniture and the distance from the TV to the audience for comfortable viewing of your favorite TV shows or films. Often, most consumers believe that the larger the diagonal, the more convenient it is to view. However, this opinion is wrong. You should choose a screen size that will be comfortable for all family members.
As a rule, the screen size is indicated in centimeters or inches, indicated by the following symbol ("). For ease of translation, 1 inch is equal to 2.54 cm.
TVs can have the following diagonal sizes:
- less than 27 inches (68.5 cm) – LCD or CRT TVs with this screen diagonal are ideal for small living rooms, kitchens or bathrooms.
- 29 inches (73 cm) – CRT flat screen TVs.
- 32 inches (82 cm) - LCD TVs are suitable for medium-sized rooms - 10-16 sq.m., allowing you to view cable and broadcast channels, as well as video in HD quality.
- from 37 to 43 inches (93 - 109 cm) - LCD or plasma TVs designed for large rooms - 17-20 sq.m., allowing you to receive analogue and satellite television.
- from 45 to 55 inches (114 – 139 cm) – plasma and LCD TVs for large rooms – 22-30 sq.m., on which you can watch movies in HD and Full HD quality, as well as receive satellite and cable television.
- more than 60 inches (152 cm and above) - plasma and projection TVs for realistic viewing of films, video clips, home videos in large rooms.
When choosing the screen diagonal size, it is important to remember that the higher this indicator, the larger the dimensions of the TV. When installing a large device, do not forget to maintain the minimum distance between the TV, the wall and the installed furniture to ensure the necessary air circulation.
Screen resolution
An equally important characteristic when choosing a TV is the screen resolution, which determines the number of pixels that make up a particular image. Most TVs support the three most available resolutions:
- 1366 x 768 (HD Ready) – suitable for watching movies, video clips and TV channels in good quality.
- 1920 x 1080 (Full HD) – suitable for watching videos and TV channels in very high quality.
- 720 x 480 - standard resolution, used for broadcasting local TV channels.
Additional functions
Choosing a TV, it is worth considering how important additional functionality is to you and whether you are willing to pay the appropriate price for it.
3D
View 3D images, videos, videos and programs using special 3D glasses. This technology in modern devices allows you to create three-dimensional images by superimposing 2 pictures. In this case, one picture is perceived by the left eye, the second – by the right. And glasses combine these images into one whole. If, for example, you do not want to view 3D, disable the option and continue to use the TV as usual.
DVD and Blu-Ray players
Built-in players allow you to play videos from discs without using stand-alone devices. This means that you do not need to additionally purchase a DVD player in order to watch your favorite movies and shows; all you need to do is buy a TV that supports similar functionality.
Interface (control panel and connectors)
The TV interface allows you not only to control the device, but also to connect it with any other devices.
USB – the ability to connect flash drives or devices with USB connection. This means that you can easily watch a movie, video or photos, listen to your favorite music by connecting a flash drive or external HDD, or a video camera.
HDMI – allows you to broadcast video and audio signals in digital form.
Ethernet is a function of connecting to the Internet or accessing an internal network located on a computer.
Wi-Fi - wireless contact with anyone peripheral device(tablet, PC, phone, video camera) supporting Wi-Fi access.
Inputs: VGA, RGB, HDMI, DVI
Outputs: stereo (audio), component, S-Video, AV output
File formats - Most TV models support the most common file formats.
- audio files - MP3
- video files – MKV, WMA, DivX, MPEG4, Xvid
- graphic – jpeg, png, bmp, pic CD
Manufacturers
At the end of the material, a few words about TV manufacturers. The most recognized and reliable brands are: Samsung, Panasonic and Sony. Companies offer not only high-quality products, but full service.
Good product quality is guaranteed by the following manufacturers: Hyundai, Toshiba, AEG, Philips, LG, Hitachi, Sharp, HP.
TVs of medium and low quality are produced by companies from the CIS countries and Asia. These include: West, Thomson, DEX, Mirta, Orion, Daewoo, Saturn, Shivaki, Horizon, Rainford, Rotex, Supra, Electron, Elenberg, Liberton, Ergo.
If you were looking for an answer to a question, “ How to choose a TV“, in this case, we hope that our material helped to obtain complete information regarding the correct and profitable purchase of this household appliance.
Let's look at three giant TVs from leading manufacturers. Having a solid size, they are suitable for installation in halls and large living rooms. Its owner gets great pleasure from watching TV programs on such a gadget, discovering incredible opportunities for himself advanced technologies. The thoughtful design and enormous potential of large display TVs gives them a sophisticated look, providing users with a wide range of functionality.
LCD TV LG 105UC9V
This device is produced by a Korean company and belongs to premium equipment. Launched in 2014, the TV features a giant screen and superb sound for stunning viewing. The curvature of the device screen eliminates problems associated with image distortion at the edges. The nine-band sound system was developed by specialists from the American company harman/kardon and fits harmoniously into its slim body. Let's take a look at the technical parameters of this model below:
Dimensions and scope of delivery
The TV is equipped with an ergonomic LG Magic Remote, which supports the full range of functions it performs, allowing you to go to the desired website, select information of interest, or visit the online application store with one touch. At the same time, the remote control has fewer buttons than a regular TV remote control.
A special feature of the remote control is the presence of an accelerometer, which actually performs the functions of a computer mouse, moving the cursor across the display depending on the movement of the hand.
The dimensions of the gadget with a stand are 2494x1515x483 mm, and the weight of the equipment is 155 kg.
Model design
The appearance of the gadget corresponds to the premium class. Thanks to the smoothly curved screen, a feeling of complete immersion in the image is created, which is ensured by the equal distance of its surface from the viewer's eyes, so even at the edges the details of the image are clearly visible. The display has a beautiful finish and is placed in a thin frame, which makes the model light.
Specifications
Among the main parameters of the LG 105UC9V it is worth highlighting:
- Device equipment powerful processor for 4 cores.
- Refresh rate? 200 Hz.
- The webOS operating system features a rich selection of applications for downloading and a clear interface.
Screen
The main display parameters are as follows:
- The diagonal of the LG 105UC9V is 105 inches or 268 cm.
- The screen aspect ratio is 21:9, allowing you to enjoy viewing as if you were in a real cinema, without the presence of black bars at the top and bottom of the screen.
- Image reproduction is carried out in 4K Ultra HD format.
- High-tech resolution of 5120x2169 pixels ensures image integrity and detail even at a very close distance.
- Matrix type TFT IPS.
TV acoustics
The soundtrack of the gadget is also at the highest level. Its 150W sound system has built-in stereo speakers that transform the sound and make it more refined. The viewer watching programs on it has the impression of being in a cinema. Generally acoustic system It is represented by 9 speakers providing high-quality sound.
Additional features
- Internet access using LAN or Wi-Fi module. This function is in demand among Smart TV users, as it allows you to watch your favorite films, animated films, sports programs, television series, music videos, as well as channels from other countries, and not be tied to the TV program that is offered for viewing by the configured channels.
- Confident support for wireless Internet communication, providing the viewer with uninterrupted and comfortable viewing.
- Child lock, sleep timer, built-in camera, Skype and 3D support, gesture/voice control.
- Direct LED backlight.
The cost of the LG 105UC9V LCD TV is from RUB 4,378,000. See the video review of the gadget below:
TV Samsung UE105S9
Samsung UE105S9 is one of the largest Korean TV devices released in 2014. Thanks to the curved screen, the color palette is richer, blacks become deeper and whites become purer. When viewing it, you create a feeling of real presence, since in addition to unsurpassed color rendition, it has surround sound. This miracle of modern technology also occupies a leading position in the ranking of the most large TVs. But its price is quite justified, since the gadget is made using the latest technology and is of impeccable quality.
Device design
LG 105UC9V features a sophisticated design. Its screen is housed in a curved frame decorated with precious metals, which helps express the individuality of its owner. A TV is a great addition to a large hall, gallery or spacious apartment. The dimensions of the gadget are 2601x1811x662 mm, and the weight with the stand is 107 kg.
Image
The screen diagonal is 105 inches or 267 cm, the configuration is 16:9, and the screen resolution is 3840x2160 mm. The display has the following characteristics:
- UHD image provides clarity and realism of the picture.
- The presence of the PurColor function promotes natural color reproduction, reproduction of natural colors that are closest to real shades.
- The use of innovative technology provides high clarity to dynamic scenes.
- Thanks to the introduction of CMR technology, blurring of the image is eliminated, so it turns out very clear.
- Supports 4K UHD and 2D to 3D conversion.
- Viewing angle 178 degrees.
TV acoustics
The powerful sound of the device is ensured by the presence of five speakers. The transmitted sound is very clear and literally mesmerizes the viewer. The sound power is 120 W.
Additional device features
Since the TV belongs to the Smart TV category, it opens access to a huge world of all kinds of entertainment:
- Using Internet access, the owner of Samsung UE105S9 has the ability to communicate via Skype and use a number of other applications. The gadget supports teletext.
- The device has a Multi-Link Screen function, which allows you to view information from several sources on one screen.
- You can control the TV using the remote control, as well as with your voice or gestures.
Technical parameters of the model
In addition to its large size, image and sound quality, this TV is also impressive with its technical parameters:
- The scanning frequency is 1200 Hz.
- Refresh rate - 1000 Hz.
- Availability of LED backlight.
- Possibility of recording video to a USB drive.
The cost of Samsung UE105S9 is 6,000,000 rubles. Watch the video to see what the TV looks like:
TV Sony KD–85X9505B
Sony KD–85X9505B is a flagship model that entered the market in 2014. The device features a classic design. It has a thin body and stable legs. The high refresh rate allows you to get realistic, glare-free images. The richness of shades amazes the imagination, delighting its owner with vibrant colors. Watching programs and videos on this device is very pleasant. The Smart TV function opens up the possibility for its users to watch movies, sports and other programs of interest online.
TV design and dimensions
Sony KD-85X9505B TV with LCD display. The model has an original design and a screen diagonal of 85 inches.
The dimensions of the device with a stand are 1957x1576x591 m, and its weight is 73.7 kg.
Image
The TV display format is 16:9, which ensures comfortable viewing of your favorite content. In addition, the display has the following characteristics:
- Screen resolution 3840x2160 pixels.
- Thanks to quadruple detail, an image containing over 8 million pixels appears on the screen. Therefore, image clarity is quadrupled compared to Full HD resolution.
- The excellent quality of each pixel is guaranteed by an advanced processing system, which allows you to watch programs even while on the a short distance and completely immerse yourself in the process of watching your favorite content.
- Active shaping technology three-dimensional images allows its owner to enjoy the realism of what is happening on the TV screen using stereo glasses.
TV acoustics
The body of the device has a non-standard design with a tube length of 1.2 m. This contributes to better sound low frequencies, increasing their power and range, while simultaneously filling surround sound space. The device supports NICAM stereo sound. Sound power 40 W.
Device characteristics
- Equipped with LED backlight.
- The scanning frequency of the device is 800 Hz.
- Shutter technology with 2D to 3D conversion.
- 4K UHD support.
- The ability to record audio and video files onto a USB drive and then play back what was recorded on the screen.
Additional features
- The Sony KD-85X9505B has the ability to wireless connection to the Internet.
- The presence of a built-in camera and installed applications opens up opportunities for communication in social networks via Skype.
- The gadget has a picture-in-picture function.
- The equipment interface has four HDMI ports and a headphone output. All cables are conveniently placed. The port replicator is compact in size, so you can install the TV close to the wall and still have easy access to the connectors.
- Mobile High-Definition Link allows you to exchange data between the TV and the device that is connected to it, as well as recharge it.
- Wireless synchronization between Sony KD–85X9505B and mobile devices provided thanks to the NFC interface.
- Equipping the TV with a remote control with a touchpad allows you to easily control it with a light touch on the touch panel. The remote control doesn't even need to be pointed at the TV, as it works via Bluetooth.
- The TV SideView application allows you to control the viewing of TV channels using your smartphone or iPhone.
- The natural image is preserved on the device screen when rotated up to 88 degrees, and excellent detail and depth of black shades are provided by X-tended Dynamic Range™ PRO high-contrast technology.
- The use of TRILUMINOS™ screen technology ensures excellent reproduction of the most complex shades: blue, green, red.
- The device provides viewing of broadcast programs, receives digital and satellite television programs, as well as encrypted satellite channels.
Widescreen TVs, which are among the three leaders described above, can successfully replace a visit to the cinema for their owner. These modern gadgets have 4K ultra-high definition functionality and show unsurpassed quality pictures. The image turns out so realistic that it creates the effect of presence, and the impression that everything seems to come to life. Availability of surround sound High Quality and other popular features combined with simple interface make LG 105UC9V, Samsung UE105S9 and Sony KD–85X9505B TVs luxury accessories that not everyone can afford to purchase. Therefore, these devices enter the domestic market in quantities of several pieces.
