Smart TV, LED, OLED, 4K, SUHD. The world of TVs is becoming more attractive every day. Today the stores sell Full HD 1080p, Ultra HD 4K TVs and new items of 2016 SUHDwith a wide high-tech screen. Which TV to choose? Two TV selection options:diagonal and favorable price. The widest range of screen options from 30 "to 110" is available on LED TV models. Prices start at 12,000 rubles for a 32 "screen (such a screen is suitable for a bedroom), and from 40,000 rubles for a 50" and 55 "diagonal (suitable for large rooms). In this LED segment you will always buybudget TVs with large screen sizes.
OLED TV
OLED TVs (organic light-emitting diode screen) will provide the richest color and brightness of the picture, they are even thinner, and image quality significantly better. Compared mdressed OLED more expensive... For example, the cost of a 55-inch OLED TV will start at 100,000 rubles.
4K ULTRA HD TVs
Manufacturers continue to improve 4K Ultra HD TVs ultra high definition- the format that offers four times the screen resolution compared to Full HD. The new resolution standard is 3840 × 2160 pixels. This resolution is supported by all modern devices: new generation game consoles and modern multimedia devices and receivers. Prices for 4K TVs are dropping: starting prices for the 50-inch model are 50,000 rubles, which is about 10% more expensive than for Full HD.When choosing a 4K TV, we recommend that you pay attention to the following characteristics:
- 3D function;
- Curved or flat screen;
- Screen diagonal.
Popular brands in the TV market 2016: All of these brands have their own characteristics.
If you want to be on the right track when choosing a TV, this article provides helpful tips to consider before buy a TV. Let us explain each of these points in more detail in the text below.
- Don't buy a TV with a resolution lower than 1080p.
- Do not buy a TV with a refresh rate less than 100 Hz.
- Consider 4K Ultra HD TVs if you want your TV to be modern even 5 years from now.
- OLED TVs are much better at displaying images than LED TVs, but they are significantly more expensive.
- Ignore the contrast ratio on the spec: manufacturers sometimes falsify numbers. Trust your own eyes.
- Check at least 4 HDMI inputs.
- Curved TVs are at their peak of popularity right now. The released models are inferior to flat TVs in some characteristics.
- Ask for SmartTV technology (or OS Android) that allows you to use the Internet and Skype on TV.
- Plan to purchase a Saunbar or Soundbar. In modern models, screens are getting thinner and speakers are losing sound quality.
- Decide in advance if the 3D function is important to you.
How to choose the diagonal of your TV?
Diagonal is an important factor when choosing a TV (TV screen size). Consider how many people in your household are watching TV at the same time and where you plan to place it. Then choose the largest diagonal to suit your space and budget. Models would be a good choice for a typical living room.50 to 65 inches.
Full HD TV viewing rule is to position the screen at a distance of two and a half to three diagonals from the viewing point. When watching 4K Ultra HD TV, you can sit 2x as close as there are four times the pixel count of conventional HDTV format.
Tip: Select the diagonal and screen resolution based on the distance from your TV viewing point. We recommend choosing a TV with a resolution of 1080p or more.
Full HD or 4K Ultra HD?
The advantage of 4K Ultra HD TVs isthe ability to see the smallest details on the TV screen.4K video definitely looks brighter and more realistic than its Full HD cousin. Pixels determine the clarity of a television picture. Most modern TVs support HD 1080p, also called Full HD, which has 1080 lines of resolution. In Russia, only a few satellite 4K channels are working in test mode (Tricolor TV company is making attempts to broadcast 4K channels). While the Full HD format has a wide range of channels.
Tip: Full HD is a common and convenient format for watching satellite channels in particular. Consider 4K Ultra HD TVs as an investment for the future, this format provides the best solution for modern game consoles and multimedia consoles.
HDR is the future.
HDR (Hight-Dinamic-Range) high dynamic range technology or increased level of contrast between light and dark areas of the image on the screen. This technology has allowed TV manufacturers to increase screen resolutions to Ultra HD. In reality, technology is making an important leap towards realistic rendering.
That being said, 2016 is destined to be the year of HDR confusion in the world. Some TVs will release new HDR models such as Ultra HD Premium (SAMSUNG), others will release Dolby Vision (Vizio) and some will be compatible with both standards (LG). In doing so, Sony decided to go it alone by labeling its TVs as "HDR" Ultra HD TVs.
Tip: In 2016, you shouldn't pay extra for HDR support on your TV, since a single standard for this technology has not yet been fully developed.
Refresh rate: from 100 Hz.
The refresh rate, expressed in hertz (Hz), describes, how many times per second the picture is updated
on the TV screen. The standard refresh rate is 60 times per second, or 60 Hz. However, in scenes with fast moving objects, the 60Hz refresh rate produces a blurry and uneven picture, especially on LED TVs. Thus, for a realistic picture in modern TV models, manufacturers increase the refresh rate from 100 to 1200 Hz.
When choosing a TV, you should avoid the words "effective refresh rate": this means that the actual frame rate is half of the declared speed ("100 Hz effective refresh rate", but in fact the refresh rate is 60 Hz).
Tip: Do not buy a TV with a screen refresh rate of less than 100 Hz. Use TVs with refresh rates for action movies and sportsfrom 200 Hz or more.
HDMI interface.
Interface HDMI delivers the highest quality video and audio from any device. The more HDMI inputs your TV has, the better. Sometimes manufacturers are cutting costs and offering fewer HDMI inputs. Pay attention to the number of TV inputs:
HDMI connect:
- Saunbar;
- Game console;
- Digital receiver;
- Media player;
- Satellite receiver;
- DVD-player;
- Blu Ray player;
- Karaoke.
If you decide, make sure the ports support the new HDMI 2.0 standard.
HDMI 2.0 is the new HDMI standard cable for ultra high definition television, improves the throughput of channels by increasing the size of the "pipe" that carries information from the source to the display. HDMI 2.0 standard. Supports 4K 3840x2160p at 50/60 fps and 12-bit color at 4: 2: 2.
Philips and Samsung have decided to separately release new tuners with HDMI 2.0, which will be an upgrade of the existing tuners in their 4K TV models. Sony and others want to make the move to HDMI 2.0 via a firmware update. What they get from this, we'll see. Panasonic already offers the TX-L65WT600 4K TV, which features a new HDMI 2.0 connector.
Tip: Buy a TV with four or more HDMI inputs.
USB connectors.
Watch movies by downloading movies via USB drives. Some models provide USB functions or applications to easily use the function of transferring video and photo content to TV, such as the Samsung ConnectShare Movie app.
Sharing content between smartphone and TV.
Share content between TV and smartphone. The new function easily displays an image or video from a mobile device to a TV screen, and vice versa - from a smartphone to a TV. For example, Samsung has developed the Samsung Easy Sharing and Samsung Smart View application in its TVs and mobile devices for the convenience of connecting a smartphone to a TV and fast content viewing.
Advice: Check the photo and video sharing function between smartphone and TV.
Smart TV: wireless internet access.
SmartTV technology is built-in Wi-Fi for connecting to the Internet. Previously, the function of accessing the global network through a TV could be realized through a special device - a router. In 2016, it is difficult to buy a TV that is not equipped with a smart internet connection system. Even budget TVs are produced with the Smart TV function.
Smart TV allows you to:
Another plus of SmartTV is the ability to download applications to the TV, similar to mobile devices, such as YouTube, browsers, social networks, etc.
As for the interfaces, they become clearer every day. For example, the LG and Samsung brands currently use a set of icons at the bottom of the screen. Google provides Sony's Android TV platform.
Owl m: SmartTV is becoming a standard set of TV specifications, and less and less influences the choice when buying.
Let's compare LED, OLED, 4K.
LED TVs.
LED TVs are the most popular in the TV market. LED TVs use LEDs to illuminate the screen and are lightweight and energy efficient.
Pros:
- Affordable price, wide range of sizes and features.
- High quality Full HD picture.
- Some Ultra UHD 4K models available.
- Bright screens are visible even in a sunny room.
- Image quality is continually enhanced with full sensor illumination and quantum dot technology.
Minuses:
- Burnout of pixels on the matrix is possible (prevented by using wires with ferrite-magnetic rings on the cable).
- The picture is inferior to 4K when displaying fast motion.
4K Ultra HD TVs.
Another latest generation LED technology is 4K Ultra HD. What is it? This is 4 times the resolution of Full HD. In numerical terms, this is 8 million pixels versus 2 million pixels. This image effect is achieved by using quantum dots or an additional layer of nanocrystals, which are illuminated by LED backlighting. Wide color gamut and brighter images are the result of 4K.
Pros:
- An assortment of new TV models.
- Ultra-high definition images.
- Latest operating system.
- Easy interaction with a smartphone.
- Convenient and fast interface.
- Extended color rendering.
- New backlight technology.
- Thinner and more modern models.
Minuses:
- High price.
- Small range of 4K TV channels.
OLED TVs.
OLED TV technology is more advanced than LED TVs. Instead of backlighting, OLED uses a pixel-controlled organic light-emitting diode (OLED) layer to achieve absolute blacks and stunning contrast levels. For example, a video of fireworks against a black sky (dark picture) is the best demonstration of OLED technology.
The LG brand currently makes OLED TVs. In 2016, there will be new OLED models under the Panasonic and Philips brands.
Pros:
- Best TV Picture;
- Better color rendering: deep blacks, contrast and detail
- Maintains image quality when viewed from the side.
Minuses:
- High price.
- Small selection of models.
Curved Screens.
Curved TVs for a more immersive viewing experience. Curved screen is used for OLED TVs and 4K Ultra HD TVs such brands Samsung, Sony, LG.
Nevertheless, curved screen has limitations... A slightly curved screen distorts the image from the side viewing angles, allowing viewing only from a central position. On the other hand, if you watch such a TV from a place exactly opposite, then due to the bent matrix, the image becomes more voluminous and realistic.
Curved models are more expensive: a 65 '' curved LCD TV costs 10,000 rubles more than comparable flat screen models. The brands Samsung, Sony and LG all make curved TVs, other manufacturers shy away from them.
Tip: Curved TVs are primarily a statement of fashion, style and the pursuit of new technologies, without providing noticeable advantages in terms of picture quality.
Soundbar: create your own home theater.
Even the newest and most advanced TVs will not provide full surround sound. This is due to the thin design of the flat panels, which lacks room for large speakers that produce good sound. For home theater, we recommend
Soundbar or soundbar connects to speakers or tablet wirelessly. You can listen to music in the whole house. Installing the soundbar is simple: just connect the wires and place the device under the TV or hang it on the wall. Models with separate subwoofers such as Samsung HW-J6000 or LG NB3630A provide an amazingsound.
Tip: A soundbar is essential for the movie, sports and immersive surround sound experience.
3D function on TV.
Manufacturers often offer it as a separate accessory, and this is an additional cost for the buyer. The average cost of 3D glasses is from 4000 rubles. Along with this, many TV models come with 2-4 pairs of glasses. When choosing the 3D function, we advise you to carefully study the equipment of your TV.
Pay attention to whether the 3D function is passive or active. The passive function differs from the active one in that passive glasses work without batteries, thus they are less bulky and lightweight.
Tip: Passive 3D technology is more practical than active one. Check to see if the 3D glasses are included with your TV.
Review of the best TV models for April-May 2016:
4K screen resolution (3840 x 2160)
Refresh rate 200 Hz
Full HD 1080p Category: LG 42LB677 TV
Model at a glance: Screen 42 "(106.6 cm)
Refresh rate 200 Hz
Screen resolution 1080p (1920x1080)
Refresh rate 100 Hz
Model at a glance:Total power 350 W
Wireless music playback via Bluetooth
161W Wireless Subwoofer
What technologies exist to improve the smoothness of motion in dynamic scenes and why this indicator is not so important when choosing a TV.
Leading TV manufacturers use their own original names for technologies that are used to improve the smoothness of motion in dynamic scenes.
Names of image processing systems of various brands of tv.
- Active Motion & Resolution (AMR) - TV Toshiba
- Clear motion rate (CMR) - TV Samsung
- Motion Clarity Index (MCI), Ultra Clarity Index (UCI) - TV LG
- PMI Picture Mastering Index on LG TVs since June 2015
- Motionflow XR - TV Sony
- Backlight scanning BLS-scanning backlight in Panasonic TV
- Clear Motion Index (CMI) - TV Thomson
- Perfect Motion Rate (PMR) - TV Philips
- Subfield Motion - plazma Samsung
All of the above technologies have nothing to do with the real frame rate, but are some kind of index that determines the visual perception of the image.
For example, earlier in the description of the frame rate of a TV one could find 400-500-800 Hz, which is not entirely true, but now some manufacturers have begun to indicate separately the exact frame rate and the indicator of the image processing system.
So in LG TVs you can see the following specifications 1000 UCI / 100 Hz, or 2000 PMI / 200 Hz, where the UCI and PMI parameters refer to image processing systems, and 100, 200 Hz is the exact frame rate of the TV matrix.
The number of hertz in the matrix of TVs.
The human eye perceives a frequency over 50 Hz as a constant component and does not notice flicker. Then the question arises: why do manufacturers produce TVs with a matrix frequency of 100,120,200,240 Hz.
The increase in frequencies is necessary to remove the flickering effect in TVs with active 3D and in TVs with systems for increasing the frame rate in dynamic scenes.
When active 3D technology is turned on in TVs, the screen is alternately darkened for the left and right eyes, which leads to a decrease in frequency by exactly half. Therefore, if you broadcast a movie in 3D at 60 frames per second, the viewer will see flickering. To remove this effect, two identical frames (duplicating each other) are shown. This technology requires matrices with an increased frequency of 100-120 Hz.
In ordinary TV without 3D, in films shot at 60 frames per second, additional frames are completely unnecessary, but if the source material is shot at less than 30 frames per second, then additional frames will significantly improve the perception of the video.
TVs with higher frequencies are also useful for those who use a TV as a monitor for video games. If the games contain scenes with a frame rate of more than 60 per second, then a TV with a 120 Hz matrix or more is preferable in order to avoid various artifacts.
And so, as for the hertz on the TV, for watching TV programs and video, a matrix frequency of 60 Hz is enough, for 3D and using the TV as a monitor for video games, choose a TV with increased frequencies of 100-240 Hz (240 Hz is the maximum value for today) ...
The importance of image processing systems.
If we talk about the parameters of the image processing systems described at the beginning of the article, then you need to understand the following, they are all created to improve the perception of the image, although they have different names and sizes.
Manufacturers essentially use this parameter for marketing purposes. For example, since June 2015, LG has introduced a new name PMI (Picture Mastering Index) - an index of image improvement, the maximum value of which can reach 2000 PMI. But the fact is that so far no one knows how this index is calculated and this transition to a new index with a large numerical value is most likely caused by a desire to sell more TVs, since the buyer will, of course, pay attention to the model with a large indicator.
Whatever the technical values of TV, a simple way will help you choose the best TV.
We upload to a USB flash drive video with dynamic scenes of Full HD 1920 * 1080 quality (video with fast movement of objects), for example, an auto track with a fast-moving car or fight scenes where actors perform sharp movements. Next, we go to the store and ask the manager to turn on the video from the flash drive on the TV you like. Thus, you can compare the image quality of TV with different indicators of hertz and image processing systems without paying attention to the numbers.
If you have two TVs of the same size with frequencies of 100 Hz, but with different values of image processing systems, while they show dynamic scenes equally well, then choose the one that is cheaper - why pay for large numbers that, in fact, do not affect anything.
We continue our series of publications on the technologies used in modern LCD TVs (we also recommend reading the first article in this series on LED backlighting). Today we will talk about various options for technologies that use 200 Hz to provide a frame rate.
History of the issue
The first cathode-ray tubes (and devices based on them) appeared in the 1920s. Due to the imperfection of the technologies available at that time, the vertical frequency in them coincided with the frequency of alternating electric current in the outlet, which was 50 Hz in Europe and 60 Hz in the USA and Japan. As a result, it is these values that formed the basis of the PAL / SECAM and NTSC standards, in which the refresh rate is 50 and 60 fields per second, respectively. Please note that we are talking about fields, not frames, since PAL / SECAM and NTSC are initially interlaced. Interlaced scanning differs from progressive scanning in that the screen does not display the entire frame at the same time, but odd and even lines in turn.
However, interlacing, especially at such a low frequency, causes the screen to flicker. That is why expensive CRT TVs used circuits that double the scan rate to 100 or 120 Hz (depending on the broadcast standard).
Lyrical digression: Most feature films shot on 35mm film use a refresh rate of 24 frames per second, while PAL / SECAM TVs are capable of displaying video in multiples of 25 frames per second. Therefore, in your home, such films will play about 4% faster than in the cinema. To avoid this, choose TVs with a dedicated feature that provides the correct 24fps content playback speed (usually called 24p Real Movie or something similar). This problem will disappear when TVs with a refresh rate of 600 Hz become widely available, but this will not happen soon.In TVs based on LCD panels, flickering is practically absent, since the concept of sweep is inapplicable to them (they do not have a scanning beam, the image is displayed immediately). In addition, they always show a progressive signal, which, if necessary, is completed from an interlaced one. However, the human eye can distinguish artifacts if the image on the screen is refreshed at less than 60 Hz. And for dynamic scenes, the higher the frame rate, the better, since otherwise uneven motion may be noticeable. In English, this phenomenon is called judder (in Russian this term can be translated as "twitching"). In addition, the fewer frames per second the TV shows, the more blurry moving objects will look on its screen. To reduce twitching and blurring, manufacturers use various technologies to increase the refresh rate on the TV screen.
Two technologies, two approaches: MEMC versus scanning backlight
Almost all manufacturers use a technology called MEMC (Motion Estimation and Motion Compensation). At the same time, the TV processor completes the "intermediate" frames and shows them in the interval between the "real" ones, due to which the smoothness and clarity of the image are increased.
MEMC technology: true 200Hz
Thus, you can effectively raise the frame rate to 200 Hz, however, to display 200 frames per second, you must have a powerful processor for processing the video stream and a fast matrix with a response time of 5 ms or less. But it will be honest, real 200 Hz. Currently, two companies do this - Samsung and Sony (such a similarity is not surprising given that both of these companies produce matrices for their TVs at the S-LCD joint venture). Moreover, Sony uses this technology only in the most expensive models, while Samsung is more democratic.
MEMC + scanning backlight: 200 Hz as it were
Other manufacturers, including Toshiba, Philips and LG, use MEMC in combination with a technology called Scanning Backlight. MEMC displays 100 frames per second, but the backlight turns on and off at 200 Hz. This achieves almost the same effect as in the case of a real 200 Hz scan, but side effects are also observed, including a decrease in perceived brightness (not surprising, since the backlight is off half the time), ghosting and flickering of the image.
And if in the case of two LED-backlighting technologies we can say that both have their advantages, then in this case honest 200 Hz definitely outperform the dishonest in everything except the cost of the finished TV. For the sake of fairness, I must say that most of the manufacturers using scanning backlighting honestly write about this in the characteristics of their products. In small letters at the very bottom of the page.
In discussions about 4K TVs, the issue of frame rate is constantly raised. There are good reasons for this. On the one hand, the frame rate directly affects the enjoyment of watching video content, be it movies or sports video broadcasts.
On the other hand, TV manufacturers themselves confuse buyers with the specific jargon they use to describe this feature in their specifications. The main problem with their descriptions is that this is either outright deception or technically incorrect. As a result, even a specialist cannot always understand their descriptions.
This article is written with the intention of stripping away all the jargon and marketing terminology in order to clearly explain to the reader three simple things: what is frame rate in relation to video, what is “native” and “enhanced” frame rate, and what effect both types of scanning have on the quality of the picture shown on the TV.
All current premium 4K TVs, such as the Samsung KS9500, operate at a 120Hz native refresh rate.
What is frame rate?
At its most fundamental level, frame rate is what its name suggests. This is the rate at which your TV refreshes the picture every second. The higher the refresh rate, the smoother and more natural the picture you see on the screen. The frame rate is especially important for high-definition, dynamic video. Each video has a limit to which you can increase the frame rate.
It is important to understand that a TV cannot add "detail" to a video source. All the details are already inside the video, and the TV can only process the signal.
If you take a film that is played in a cinema as an example, then the equivalent frame rate would be 24 frames per second. These 24 frames are then converted to 30 frames for broadcast television. After that, some manipulation of the video is done and 60 frames per second are obtained, which corresponds to a "scan" at 60 Hz - the format in which most digital video is produced today.
4K TVs are capable of operating in both 60Hz and 120Hz modes (60 or 120 pictures per second). Older HDTVs run mostly at 60Hz (many models actually operate at 50Hz). Because 4K TVs are expected to be of the highest quality, 60Hz has quickly become a bit of an obsolete technology, and all 4K TVs now support 120Hz.
How are the frame rate and frames per second of a video source related?
And of course, another question arises: what happens when you watch a 60Hz video on a 120Hz TV? The TV will recognize the 60Hz source and then can do a few manipulations or "enhancements" to show the correct image.
Frame interpolation
The first method we'll look at is called frame interpolation, and this technology is used by all modern TVs, including 4K TVs. The essence of this technology is that two or more different video frames are taken, after which they are superimposed on each other and the result of this operation is shown between real frames. As a result, the picture is slightly more blurry.
The next method is called black frame-insertions (BFI). This technology consists in inserting black frames instead of dropped frames. This method allows you to combat motion blur.
An example of the BFI method.
What is motion blur on 4K TVs?
Motion blur is a problem with the video source. Both methods described above are needed to avoid this effect at 120 Hz and 60 Hz. It should also be understood that 120Hz TVs control blur much better than their 60Hz counterparts. Blur, as a phenomenon that we perceive with our eyes, is a composite honor of several factors. First of all, this is the blur inherent in the type of TV matrix. Second, this is the desynchronization of the sweep and the number of frames per second. Third, this is the blur, which was "fixed" by the camera during filming.
The TV cannot do anything about the blur that has occurred during filming. Interpolation and BFI are needed to combat the first two causes of blur. Both methods trick our brains so that we see a clearer picture when watching a movie or sports broadcast.
The better a 4K TV can "fit" a picture (24p, 30fps, 60fps) to its 120Hz, the more natural and pleasant it will look. Of course, this also means less jitter and less blur. One of the key differences between a good 4K TV and a bad 4K TV is how it handles motion in the frame. The cheaper the TV, the worse it eliminates the above negative effects.
Samsung TVs from 2015 and 2016, and LG OLED 4K TVs, which began rolling out this year, are excellent examples of 4K TVs with 120Hz scanning and good anti-blur and shake reduction.
How are frame rates and PC games related?
4K TVs are very commonly used today as giant gaming monitors and connected to computers via HDMI.
Most modern 4K TVs work well as monitors because their refresh rates support two functions. On the one hand, all the major 4K TV brands in 2015 and 2016 perform well at 60fps due to their 60Hz refresh rate. On the other hand, almost all TVs support 120Hz, which makes gaming comfortable at 120fps.
Examples of 4K TV models that are great for gaming at 60Hz: Samsung JU7100, LG OLED 4K EF9500, Samsung SUHD KS8000.
4K TVs that support Full HD at 120Hz are the Sony X810C and X850C.
So what do frame rate "improvements" mean for 4K TVs?
Before we proceed, remember one fundamental and simple thing to avoid future misunderstandings. The sweep frequency can only be 60 Hz or 120 Hz.
Any manufacturer-specified sweep frequency above 120 Hz is the result of more intensive versions of interpolation or BFI. These "enhanced" sweeps can go up to 240 Hz. Each manufacturer has a different name for this "technology".
If a 4K TV offers 60 Hz, then the "enhanced" scan will be 120 Hz, if the TV's normal scan rate is 120 Hz, then the "enhanced" will be 240 Hz. Examples of such sweeps and their names are included in the list, which you can find below:
- Sony: MotionFlow
- 120Hz @ 60Hz native refresh and 240Hz @ 120Hz native scan
- Samsung: Motion Rate
- sweep
- LG: TruMotion
- 120Hz at 60Hz native and 240Hz at 120Hz native
- Vizio: Effective Refresh Rate
- 120Hz at 60Hz native and 240Hz at 120Hz native. Vizio offers a “Clear Action” sweep that doubles the processed picture. The result is numbers like 480Hz and 720Hz for 60Hz or 960Hz for 120Hz. These numbers mean nothing and were designed to impress a potential buyer.
- Panasonic: Image Motion
- 120Hz at 60Hz native and 240Hz at 120Hz native
Charts like this fool buyers into thinking there is a sweep above 240Hz. In fact, sweeps above 240 Hz do not affect the picture quality in any way.
Conclusion
In most cases, a normal 120Hz sweep will be sufficient. Some TVs offer excellent picture quality and motion control at 60Hz. The difference between 60Hz and 120Hz will be barely noticeable on video that is shot at 60Hz. Additional motion enhancement technologies (such as doubling the refresh rate) are a nice bonus in specific situations, such as watching sports, where blur adds a sense of presence. All technologies that make the sweep frequency higher than 240 Hz can be safely ignored.
The passport of every modern LCD TV or computer monitor contains such characteristics as the refresh rate. But even a sales assistant is not always able to explain how this indicator actually affects the image, how the picture differs at 50Hz, 100Hz, 200Hz and which frequency is better to choose. However, there is a difference, and quite noticeable: the number of Hz significantly affects the quality. Sometimes it is worth slightly increasing the purchase costs, but getting a better model with a clear image and smooth transitions dynamic frames.
This figure should not be confused with the filming rate of 24 frames per second, or the TV content rate of 50 frames. The refresh rate of a TV screen - or sweep - is measured in Hz (hertz). The Hz indicator indicates how many frames per second the panel is capable of displaying.
The higher this characteristic, the clearer the picture will be, without "blurry" movements and flickering.
If you go a little deeper into history, then the already obsolete monitors and televisions had a modest frequency of 50Hz, not hiding the "smeared" scenes with the rapid movement of the object. Later they were replaced by more technological devices with 100Hz sweep. The new products have completely eliminated the unpleasant flickering, but there was still no need to talk about the quality. As mentioned above, tele-content produces 50 frames per second (which is equal to 50Hz), updated models were "painted" intermediate frames, thus, slightly increasing the clarity of the image to a satisfactory level. But in comparison with their predecessors, TVs were considered excellent, and there was no better alternative.
High image quality will be ensured at least 200Hz when digital video processing already projects three additional intermediate frames. Although the manufacturer promises that 100Hz is enough for modern technology, this is not entirely true. It is enough to turn on two TVs with different frequencies: in comparison, the difference in quality at 100 and 200 Hz will be noticeable. But the screen resolution should also be taken into account. For modern types, 120 Hz is sufficient.
Technical description of the unwrapping process
To understand what the refresh rate is, and how the frame is drawn in, you need to understand the types of LCD TVs and monitors that are on the market today.
Now about the technology of the display refresh rate itself. Television series provided through non-commutated communication channels produces 50 frames per second. Digital video processing made it possible to copy each frame and show it twice, so the 100Hz scan was born. The technology made it possible to eliminate the most uncomfortable image defect - flicker.
Further developments borrowed technologies from computer animation, when the technique takes two frames as a basis and intelligently creates all the intermediate ones, creating smooth and clear movement. Unlike a computer, a TV has no concept of a “future shot,” but that turned out to be enough. Completion of additional frames is carried out based on the analysis of the past, which provides a high accuracy and smoothness of images... Subjects moving at high speed are clear and not blurry.
What the market currently offers
The most modern panels today are considered to be 600 and 800Hz panels with built-in Sub-Field Driving technology, which promises unsurpassed picture quality. There are many doubts about these characteristics. Mistrust in manufacturers was born long ago, when such equipment was just beginning to enter the market. In those days, marketers did not hesitate to ascribe hertz, when image finishing technologies inserted not copies of frames, but simply black pictures that the eye was not able to perceive. Thus, the quality did not improve, but the sale of digital electronics went very well. Modern LCD TVs of famous brands correspond to the parameters stated in the passport, and there is no need to doubt it. It is more important to take care of the availability of digitized satellite or cable TV channels.
What resolution affects
Talking about the scan frequency of the TV, one cannot fail to mention other important parameters. In addition to the above indicator, it is worth paying attention to screen resolution which also has an impact on image quality. The indicator is measured in pixels (p).
It is worth noting that the continuous development of technologies, their improvement, leads to the fact that each new model is much better than the previous one. About five years ago, 720p devices were at their peak, and modelFullHD at 1080p just appeared and cost twice as much, but today their cost is almost equal. The modern market has been updated with a new HDTV resolution metric - 4K Ultra HD, capable of displaying four times more pixels than Full HD.
NewUHDTV or 4K possesses greater color reproduction, 120Hz scanning frequency provides clear, crisp and realistic images. It is difficult to assess which is better: full immersion in 3D or ultra-realistic pictures of the new resolution format. But don't write off Full HD at 1080p. Although the permission fades into the background, it will be actively used for a long time. Most of the content is "sharpened" for this resolution, in contrast to the new UHDTV, for which films have not yet been released, and the existing ones are not cheap. Therefore, you can choose only based on the quality of the incoming signal.
Moreover, the weight of such a file is much larger, the current cables, Internet speed and Wi-Fi router will also have to be replaced with faster and more powerful ones, capable of playing and displaying ultra-precise video format.
Summarizing
Taking into account all the relevant parameters, several conclusions can be drawn.
- Scan Provides smooth picture, clear storyboarding of moving objects.
- Permission provides a realistic rendering of each frame, when you can see all the details, color, movement of water or people are accurately reproduced.
- When choosing which TV model is better, it is worth analyzing all key characteristics in aggregate so that both the screen resolution and the frame refresh rate are at the same level.
Also, feel free to include and compare the image in the store before purchasing. Consultants will never be able to describe in words the picture quality of a particular model. Maximum comfort and satisfaction from the new acquisition will be at their best if you approach the choice with a grain of salt.