preface:

For this complicated 4K TV market, true and false 4K, true and false HDR, 10bit color depth, OLED， Curved surfaces and quantum dots are full of various concepts, and 4K TVs of the same size may have a large price difference. What's the difference between these 4K TVs? What kind of 4K TVs are qualified 4K TVs?

Messi's personal opinion: the following points should be met on a qualified 4K TV ：

1、 (Hardware)

RGB arrangement 4K screen; yes HDMI2.0 and USB3.0 Interface; Hard solution H265 (4K for 60 consecutive frames) TV chip; Audio unit: Audio professional cooperation certification (such as JBL, Harman, etc.).

2、 (Display technology)

MEMC (Motion estimation and motion compensation technology): improve motion blur and anti smear; HDR technology (High dynamic contrast): improve the brightness to a certain extent, and display details of bright and dark objects (but HDR resources are hard hurt), Backlight partition technology : It can improve the light leakage of LCD TV.

3、 (Intelligence)

High performance SoC ， Smooth and easy to use UI , with Bluetooth and voice remote control , the content is not Restrict third-party apps , classified and well integrated free video content, including VIP content It can be seen better.

In fact, TV is a display device in the final analysis. Now, smart TV is just like a built-in box, so we should pay more attention to the performance of picture quality and sound quality.

Today's test is Kukai 50A2 HiFi TV: 50 inch, RGB 4K mass creation soft screen, JBL A-level certified 8 audio (claimed to be comparable to 3000 sound effects), the latest flagship MStar 6A938 chip, dual HDMI2.0 and USB3.0, 2-year iQIYI VIP, 3499 yuan. Is that very attractive? My mother taught me: Don't believe in advertisements, only after using them can I know.

In order to let everyone know the core content of TV as soon as possible, the following layout adjustments are made:

1、 [Screen&Image Quality]

2、 [Decoding performance]

3、 [Kukai UI&Remote Control]

4、 [Sound quality performance]

5、 [Heating&expansion]

6、 [Unpacking&Interface]

7、 Summary

8、 [True and false 4K, true and false HDR discussion and thinking]

1、 [Screen&Image Quality]

Let's take a look at the screen parameters first:

The Kukai 50A2 uses the popular group creation RGB soft screen in the domestic TV at present, and the 50 inch "assassin" of Microwhale before is also this screen. The response speed is 9ms, the brightness is about 300nit, and it supports HDR and MEMC. The parameters are mainstream at present, and there should be some. However, messi noticed that this TV has no backlight partition, and the light leakage performance remains to be observed. Now let's begin to practice.

[RGB Arrangement Certification]: Real RGB

The above is messi. After the phone is magnified, the live shot can confirm that the 50A2 is indeed an orthodox RGB layout. In addition, the display effect, at least for the time being, does not worry about the true or false 4K screen.

Static performance: (all image settings are "standard" by default, and the backlight is 100%)

Before the "props" test, Messi found an interesting phenomenon. Observe the following figure, and the changes when opening the picture and 4 seconds later.

When viewing a still photo, after about 4 seconds of opening, the image color will change differently, the saturation will increase, and the color will become more colorful, but the dark details will also be lost seriously. I like to look good at myself. Messi asked the after-sales engineer of Cookai about this problem, and the reply was “ Image quality optimization ” The function is working, It cannot be closed separately, but only works when still pictures 。

Because“ Image quality optimization ”The function will have a great impact on the static appearance and test map, but it cannot be closed, so the following contents will be explained by messi“ Image quality optimization ”Impact.

[Light leakage control]: Medium

Due to the material problem of the LCD TV, it needs to fully open the backlight, so it also needs to light up when displaying black, so light leakage cannot be avoided, but it does not mean that it cannot be improved. Look at the performance of the 50A2.

In the figure below, the upper part is the Cookai 50A2 group innovation RGB4K soft screen (side entry backlight), and the lower part is the Sharp 40LX170A X super crystal panel soft screen (straight down backlight).

  From the live picture of the mobile phone, we can clearly see how well Sharp's light leakage control is in place. In contrast, the 50A2 has a certain degree of light leakage in four corners. The light leakage control is general, but acceptable, which will be discussed later. This result is related to the backlight mode and the technology used. If the 50A2 adopts the backlight partition technology, perhaps the light leakage control will be better, but unfortunately not.

[Clarity]: up to 4K standard

The definition of 4K TV must meet the standard. The following is the 4K TV resolution test chart by Professor Qian Yuankai.  

Details: no matter the letters, Chinese characters, and thin lines can be seen clearly, and the resolution is no problem.

  Let's look at color representation and boundary control: (contrast before and after image quality optimization)

It can be clearly seen from the moving picture above that before the "image quality optimization", the top interface of each strip stack was basically pasted together. After the optimization, the color saturation increased and the smallest color boundary was also very clear. Therefore, the "image quality optimization" has a certain effect on the increase of color saturation and contrast.

[Gray scale performance]: good performance

The practical significance of 256 level gray-scale image testing is reflected in the restoring power of the dark details and sense of hierarchy of the screen. It represents the color, light and shadow levels in the black hair details, and can roughly see the advantages and disadvantages of the LCD panel of the tested display.  

The actual performance of the gray scale is good. There are 4 horizontal and 4 vertical scales in the upper left corner. I can't see clearly. I can see everything else clearly.

[Brightness]: Average

The measurement of brightness requires professional instruments to measure in a specific environment, but Messi does not have this condition. The maximum brightness of this panel is 300 nit officially given by Cookai, which is medium. The maximum brightness of ordinary LCD TVs is about 500 nit. The higher the brightness, the higher the contrast, and more brightness details can be seen in the same picture. Therefore, some OLEDs or quantum dot TVs that pursue more extreme picture contrast achieve screen brightness of more than 1000 nit.

As you can see in the figure below, the contrast is at its best, but the brightness bar is not obvious from the front. It can be seen clearly from a large angle from the side. The reason should be the lack of brightness.

[Color representation]: High saturation, but moderate level

The following is a comparison with the previous Sharp (1080P). It can be seen that the color transition of both is good, and the lower two can basically display "triangle"; In the level representation of the circle in the right figure, 50A2 has richer color and higher saturation, but it is lacking in color hierarchy. Multiple balls appear obvious bands, and the overall picture is slightly dark.

Don't worry too much about the visual angle, unless you pursue the extreme angle when watching TV at home

Picture adjustment:

Standard (brightness 50: contrast 50: color 50), soft, three modes. Personal preference of messi standard mode.

Static proof sheet: Bright colors, high saturation, "image quality optimization" is a bit excessive

Below is a comparison chart. The top is Cookai 50A2, and the bottom is Sharp 40LX170A.

The following are Before and after "picture quality optimization" Before optimization, the picture performance is close to Sharp TV and the original film performance. After optimization, we can see that the color saturation is increased, even a little too high, the picture brightness is reduced, and the dark details are lost. Whether the display effect is pleasing depends on the population. Messi personally believes that "image quality optimization" is a bit excessive.

From the sample above, the color saturation of 50A2 is really good After "picture quality optimization" The contrast and color saturation are further improved, but it seems a little "Overcorrect" I feel that the dark details are lost.

Dynamic proof sheet:

After reading the boring test chart, let's take a look at the live pictures: (The live pictures taken by mobile phones are basically close to the actual display effect, but the deviation is inevitable)

The lower part of the first picture above is Sharp 40LX170A, which basically represents the display trend. The color saturation is very high, which is more pleasing to the eye.

Summary:

In terms of the overall display effect, 50A2 has high saturation and bright colors, but the "image quality optimization" seems to be excessive under static conditions, and the light leakage control and brightness need to be improved. As for preferences, Messi does not make too many comments.

[50A2 screen technology]

① Support HDR technology: limited practicability

HDR， The full name is High Dynamic Range, that is, high dynamic range. Generally speaking, HDR can expand the brightness range of display, show more details of light and dark parts, bring richer colors and more vivid and natural details to the picture, and make the picture closer to what the human eye sees.

HDR should conform to HDR standards from video capture to post editing to terminal display, which can truly show the appearance improvement brought by HDR. Mainstream HDR has two formats Dolby Vision and HDR 10 。

If it is HDR10 video, the right side will automatically identify and display the "HDR10" icon.  

Messi downloaded the HDR (HDR 10) and non HDR versions of the same Sony video. Let's see the effect of HDR and non HDR.

Well, which one do you think looks better??

Messi asked seven friends, who all thought that the right side of the picture was more prominent in terms of color and display details, but we can observe that HDR video is on the left (upper right corner) ! Messi was confused at that time! Why is the video performance of HDR worse than that of those without HDR?

Through analysis, messi may be caused by the following reasons: because it was said that to show the true strength of HDR, The HDR source is one, and the TV chip supporting HDR is one And there is another piece Screens that meet the standard Obviously, in the test, the first two Cool Open 50A2 are up to the standard, and only the screen is left. Whether Messi dare not assert or not, but after reading the relevant data, we still get a similar answer, which is slightly more at the end of the film.

Does HDR work?

This question is the same as that of 4K, but it is not as important as that of 4K. First, there are few HDR movie sources in China. Second, the content details of HDR videos cannot be displayed on the low and medium end TV screens. After consulting the engineers, the answer is that if HDR is not supported in videos, the broadcast effect is the same as that of ordinary TV, and there is not much difference. What we are talking about here is the medium and low-end TV without HDR certification. For the high-end TV with HDR certification, the higher hardware specifications will naturally show better performance in the same content.

Conclusion: Therefore, the middle and low end 4K should not be superstitious about HDR. It is the best support, and should not be forced.

②、 MEMC（ Motion estimation and motion compensation ）: Practical

MEMC is a motion picture quality compensation technology used in LCD TV. The principle is to use a dynamic imaging system to insert a motion compensation frame between the traditional two frames of images to increase the 50/60Hz refresh rate of ordinary flat screen TVs to 100/120Hz Eliminate motion jitter and motion trail 。

Messi found this The function is very practical The smoothness of the picture is also greatly improved. The following is the video comparison before and after the MEMC is enabled.

Whether it is sports scenes or ordinary TV drama scenes, after the MEMC function is turned on, the jitter during sports is indeed reduced, which greatly improves the actual viewing fluency. Maybe people say that it is more comfortable, mostly from this function, so the 50A2 MEMC is very practical, and you should also pay attention to this function when purchasing other TVs.

2、 [Decoding performance]: Brave (60 frames/100M code rate 4K can be hard solved ）

Since it is a 4K TV, it is necessary to compare the hard H265 encoding with the 4K of 60 frames Powerful decoding chip , and much faster than HDMI1.4 HDMI2.0 Support.

The decoding chip of 50A2 is the latest TV flagship chip - Aurora 6A938 (known as the strongest TV chip at present), known as the "Qualcomm 820" among TV chips.

        “ Aurora 6A938 It adopts the top CortexA72 CPU , driven by MStar Core Turbo, which is a true multi-core drive engine specially developed by MStar for TV, GPU Then match with the latest ARM Mali T820 , at 4K2K, Game and interactive UI up to 60fps , handles very smoothly. DDR4 memory Data transmission bit width 96bit ， 2.4Ghz main frequency, with a total bandwidth of 28.8G, provides a highway for data transmission for 4K content processing and graphics computing. " (From the network)

It can also be seen from the figure below that in addition to the strength of CPU and GPU, the bigger highlight is the optimization of TV image quality, Zhencai Engine Pro In addition to improving image quality and supporting HDR, hard solutions are also very powerful, support yes Global mainstream 4K coding format HEVC，VP9，H264， even to the extent that Support HEVC 60 Hz two-way playback What about the current H265 encoding support? The following is a hard solution test?

Hard solution measurement:

1、 [4K 123 four primary colors]: AVC/AAC， 30 frames, 80Mbps code rate

Audio synchronization, perfect play, drag smoothly.

2、 [AOA_Miniskirt]: HEVC/AAC， The frame number is 60, and the code rate is 26Mbps.

Play and drag smoothly and play normally.

3、 [Hokkaido and Tokyo]: Video AVC, audio AC-3, variable frame number, code rate 112Mbps

Audio synchronization, perfect play, drag smoothly.

4、 [4K girlhood 120fps]: video AVC, audio DTS, 120 frames, 101Mbps bit rate

The screen is black, but the audio can be played.

5、 [Duck flew 2160P]: Video AVC, no audio, 30 frames, 243Mbps bit rate

The first 7 seconds play smoothly, and the subsequent slide type stuttering is caused by high code rate.

Decoding summary:

The TV chip Aurora 6A938 of Kukai 50A2 is really powerful in hard solution, Hard solve 60 frames (Medium low bit rate) No problem, not to mention mainstream 4K video with low bit rate below 30 frames, even some high bit rate>100Mbps can play normally. Of course, if encountering double high or top abnormal bit rate, 6A938 decoding will also encounter some black screen problems, but this will not affect its powerful hard solution level. It is worth noting that audio DTS and AC-3 Such audio can be played normally, satisfying 。

3、 [Kukai UI&Remote Control]: Surprise and disappointment

[Startup time: general]

After several tests, the average startup speed is about 25 seconds The startup speed is relatively ordinary , there is room for optimization.

(ps: Is your boot speed slow? Why did I open it in a few seconds? In fact, many manufacturers make a point of the startup speed, often referring to the startup in a few seconds - standby startup instead of power-off startup, and some even excessively cancel the physical startup key)

[Simple UI interface and clear operation logic]

In the call out setting bar on the left, you can select the signal source, TV settings, access to local broadcast, etc. The local broadcast can access the LAN, which is more convenient for friends who set up NAS.

Rich setting functions:

In addition to the conventional "image mode" and MEMC switches, you can also turn on "surround sound", "listening alone", and adjust HDMI EDID.

[UI highlight 1: deeply customized iQIYI (2-year VIP)]

Among many domestic video websites, iQIYI has accumulated a relatively good reputation by virtue of copyright advantages and the development of its own online drama resources. The 50A2 iQIYI is not simply crammed into an iQIYI APP. Indeed, the two have conducted in-depth cooperation. Let's explore together.

Step 1: Create and log in to Kukai account, and then click "TV", a prompt of "Receive 2-year VIP" will pop up, and you can receive the VIP successfully according to the prompt.

IQIYI has certain advantages in TV dramas (especially home-made online dramas): hot dramas such as "On Strange Flowers", "Scrapped Wood Brothers", "Notes on Tomb Robbing", etc.

In addition to eliminating annoying advertisements (40-60 seconds), VIP can also watch hot dramas in advance than ordinary members: the second season of Remaining Crime, Old Nine Gate, etc. For quite a few years, it was hard to find a VIP for Descendants of the Sun, and we should all remember that.

In addition to unique VIP resources, the source code source has also been enhanced to support the export of H265 4K movies or TV series, which should also be a benefit of cooperation.

[UI highlight 2: unique child mode]

Almost every box or smart TV will have a "children's zone", but it basically just transplanted a third-party nursery rhyme or game app, without in-depth integration and innovation. The "children's mode" (or tiger mom mode) of in-depth customization of Kukai 50A2 can really help parents to a certain extent It is practical to regulate children's TV watching time and content 。

Children's film and television content: rich

Basically, there are both popular and classic animations. If the function is not enough, it can be expanded by adding children's APP.

Children's education, games, etc.: relying on a third party (support user-defined expansion)

[Restrictions and extended applications of third-party APP:]

The built-in APP resources are generally:

The Dangbei market, cloud games and smart home are all developed in cooperation with third parties. Some are castrated versions, while others are just ordinary third parties, which are not very distinctive.  

Limitation of third-party APP: internal blocking of live broadcast software (but can be cracked)

Due to well-known policy reasons, although the Dangbei market is built in, it must also be a "castrated version", which is not supported by many software. Therefore, in order to expand third-party resources, it is necessary to re download the native Dangbei or sofa butler markets, so that software like "TV Cat" and "HDP" can be installed. (Wukong remote control can be pushed by remote APP)

[Infrared remote control: poor comment!]

Gutter capsize: first No standard Bluetooth remote control It has led to a decline in experience and control. What is silent is the standard infrared remote control The remote control range is too small and the sensitivity is low , frequently no response occurs to keys, which can be said to be the worst infrared remote control I have ever used. Other experiencers also have similar problems. I hope the official can provide a reasonable solution.

Remote control experience remedy: iFLYTEK TV assistant

The bad experience of infrared remote control once made me feel the urge to throw the remote control, but later I found that the built-in APP of "iFLYTEK TV Assistant" can greatly improve the operating efficiency, or even replace the infrared remote control.

From the above video, we can see that after the mobile phone sends out voice, the TV terminal can quickly identify and arrange resources. The operating sensitivity of the virtual remote control on the mobile phone is far higher than the standard infrared. It is recommended that 50A2 users can try this APP.

Summary of Kukai UI and remote control:

From the actual experience, the "big content" officially promoted by Kukai is actually more inclined to the resources of iQIYI and the unique children's mode supported by VIP halo. Both are really easy to use. The traditional live broadcast part can also play a complementary expansion through the supplement of third-party APP, while the poor experience of remote control greatly affects the smoothness of use, So the overall experience has both surprises and disappointments.

4、 [Sound quality]: top performance at the same price

The sound system of the Cookai 50A2 has passed JBL A level certification, Golden Ear training, four bass units of thousand yuan level A total of 8 units of audio, which is claimed to be comparable to 3000 sound quality, has multiple guarantees, and it seems destined that its sound quality will not be poor. Messi is not a sound and music burner, so it can only share the listening experience from personal observation and listening experience.

1、 Low volume can meet the demand

Messi observed that when watching TV or movies, when the volume is turned to 1-3, you can get a good volume and sound quality experience (not blurry). However, many televisions can't hear the dialogue clearly when the volume is turned on too high.

2、 Bass effect: shocking

Messi recorded three pieces of audio with the Sabine head microphone, which you can feel (the microphone is placed 2.5m away from the front of the TV).

Falling Flowers and Flowing Water (Eason Chan):

Fall Out Boy

3、 Special audio mode (turn off the screen to listen to music)

In order to give full play to the role of JBL A-class audio, the 50A2 also has a separate physical "Bluetooth key" on the left side of the front panel, which can be played by connecting mobile phones with Bluetooth. It is very creative, and the actual connection effect is also good, iphone6，360N4， Meilan 3S, plus 3, and Glory 5A can be connected and played normally.

Summary of sound quality:

The JBL A-level certified 8 audio system equipped with the Kukai 50A2 really shows a sound quality experience that is far better than that of TVs at the same price. When the matching "audio mode" can also be turned off, you can feel good sound quality. Think about the sound quality of the 50A2, which can meet the pursuit of sound quality by most people.

5、 [Heating and expansion]: basically satisfied

The 50A2 also includes a 1 to 3 digital TV set-top box conversion cable, which is good news for friends who use set-top box connections at home.

Heating: properly controlled

After 3 hours of continuous playback, it was found that the temperature of the left and right motherboards and power supply positions was the highest, basically around 40 degrees. This degree showed that the heat dissipation and temperature control of the 50A2 were fairly good. Of course, summer was the real test.

Power consumption: medium high

When the TV is playing, the power consumption is about 70W, which is normal. The official data of standby power consumption (GB24850-2013 standard) is 0.5W, which is rated as 3, so the standby power consumption is indeed higher. Friends who care about power consumption can turn off the power and cut off the power.

Summary:

The digital TV set-top box conversion line attached to the Kukai 50A2 is very considerate, expanding its use, and its heating and power consumption are mainstream.

6、 [Unpacking&Interface]

Supplementary unpacking

Kukai 50A2, 50 size, three-level energy consumption, is priced at 3499 yuan. In this size of 4K TV, the price is medium, not cabbage. Of course, every price is worth every purchase.

Accessories: complete

Metal anti slip tripod, instruction manual, infrared remote control (with battery), separate power cord and digital TV conversion cable, as well as a small wrench The manual is a literary style, but the operating instructions are excessively omitted, making it difficult for novices to get a quick start (such as basic problems such as exiting the audio mode, where to get a VIP, etc.), and the complimentary digital TV conversion cable and battery praise.

Convenient installation

A small wrench is attached, which is easy to install. A set of brackets on both sides can be tightened once. The base is equipped with anti-skid rubber, which is considerate.

Front: in order

The front net is hollowed out at one side with three plastic black edges. The frame is not narrow, nor does it use an all metal frame. It is durable, but not stunning.

The lower left side is the physical Bluetooth button, and the right side is the audio logo of Kukai and JBL.

Wall mounted, but not beautiful

The back is designed to be narrow at the top and wide at the bottom. There is a whole metal backplane on the top, and the main board and audio unit are white at the bottom. The whole machine has wall hanging holes, but the hole position is lower, so the wall hanging is generally beautiful.

Rich interfaces:

There are all the necessary ones. Three HDMI 2.0 and two USB3.0 are standard configurations. In addition, TF card slot is also equipped.

Equipped with stiffeners: anti screen deformation

Generally, large screen TVs will be bent when heated after being used for a long time, and can resist bending to a certain extent with stiffeners.

Heat sink: relatively abundant

JBL Class A audio unit: good comments

Summary: The appearance is durable, the interfaces are rich and complete, and the JBL A-level audio is powerful, which is not suitable for wall hanging.

7、 Summary

advantage:

1. RGB 4K screen with high color saturation

2. Flagship decoding chip, strong hard solution strength

3. Equipped with JBL A-level audio, superior to the same level of audio quality

4. High interface specification, standard configuration of multiple HDMI2.0 and USB3.0

5. 2-year iQIYI VIP, customized content update, practical child mode

6. MEMC works well

Disadvantages:

1. The static "image quality optimization" function is a little too

2. DHR function is generally practical

3. Screen brightness and light leakage control are general

4. Poor remote control experience

From the practical experience, at the price of 3000, the performance of the Kukai 50A2 is really commendable. The configuration and interface of the flagship iQIYI VIP of JBL A-class audio for two years, as well as the RGB 4K screen, are bright enough and the functions are balanced. However, there are obvious shortcomings in the control and screen display. If you want to buy a 50 inch 4K TV at the entry price, its advantages are enough to attract you, and you don't care about its shortcomings, it will be a good choice; If you pursue higher requirements for visual enjoyment, it really can't bring you more.

Figure/text: messi

Weibo: Buenos Aires Messi

8、 [Discussion and reflection on true and false 4K and true and false HDR]

First of all, it is stated that Messi is not a TV professional, but only summarizes some opinions after consulting the data. If there is any mistake, we hope the professional can correct it.

1、 RGB, RGBW -- the debate between true and false 4K?

First, the definition of 4K TV: 4K TV is screen Physical resolution reaches To 3840 × 2160 (QFHD), and can Receive, decode and display TV with video signal of corresponding resolution. The resolution of 4K TV is four times that of full HD (FHD. 1920 × 1080) and about nine times that of HD (HD. 1280 × 720).

This obviously involves Screen, transmission, decoding Three parts, it is obviously not appropriate to just discuss the 4K TV panel. Even if the RGB traditional 4K panel is equipped with a low-speed HDMI1.4 or the built-in decoding chip does not support H265 encoding and 60 frame 4K signal decoding, although it can play some 4K, it has great limitations. transmission Need high speed HDMI2.0 USB3.0 , and decode Is required High performance TV chip , which is the two points mentioned at the beginning of messi.

Low end RGB W and RGB arranged panel, true or false 4K debate? (High end 4-color technology is beyond the scope of discussion)

After consulting the information, we learned that the traditional LCD screen is arranged in RGB, The RGB red, green and blue primary colors are color display pixels. Only when these three colors are mixed can more colors be displayed on TV. In RGB, another W (white) subpixel point is added. Since W pixels cannot display colors, although they can improve a certain brightness to compensate for the insufficient backlight brightness, they cannot display all RGB colors.

Taiwan manufacturers mostly provide RGB panels with lower prices, while Korean RGB panels are more expensive. Therefore, in order to compete with Taiwan manufacturers, Korean Samsung and LG are targeting Low end market has developed cost RGBW panel Although Korean manufacturers always claim that RGBW meets the 4K standard (physical resolution meets the standard) Display effect Compared with the traditional RGB panel, the color is definitely It's worse , so It is generally believed that the low-end "RGBW" panel is a fake 4K panel 。

Conclusion: When purchasing low-end 4K TV, it is the first choice for display effect RGB panel.

2、 True or false HDR TV?

In fact, this concept is the same as the real and fake 4K TV above.

HDR TV except HDR video source , also need to be able to show HDR effect screen and H DR decoding chip , the three can really play their advantages, but at present Middle and low end Of HDR enabled TVs are only HDR decoded videos, The screen does not meet the standard (Single brightness can eliminate most 4K TVs on the market.) If low-end HDR TVs No HDR source , and watching ordinary videos is not very different from other televisions, or there is no difference.

（ HDR certified high-end TV The hardware specification is higher, and it can play movies and videos more naturally than ordinary TVs Bring more details ）

  HDR Certification Requirements

From the perspective of HDR certification technical requirements, in terms of peak brightness alone, the 50A2 screen with a maximum brightness of 300 nit does not meet the standard. In terms of LCD brightness alone, more than 99% of medium and low end 4K TVs on the market cannot meet the standard. Therefore, HDR certification is not available, just claiming to support HDR decoding. You can check the price of models with Baidu's "OLED" or "True HDR" keywords, and it will be found that almost all certified HDR TVs are sold for more than 10000 yuan at the high-end, So the HDR function on the low-end 4K TV is still relatively weak 。

(The above are just some personal opinions of Messi. I hope they can be of some help to you.)

Picture/text: messi( Buyi messi)

Weibo: Buenos Aires Mess