This paper mainly introduces the screen curvature, and focuses on the 4000R golden curvature in the screen curvature.

What is the screen curvature

Curved surface TV has attracted worldwide attention for its “new generation growth power” in the TV market. TCL, Hisense, Konka, Samsung Electronics and other major TV manufacturers have successively launched 40,48,55,65,78 inch products with strong market and price competitiveness, while seeking to expand the market share.

The appearance of curved TV began with the idea of “moving the movie screen home”. The screen of the cinema looks not flat but curved. No matter from which angle the audience views the film, the pictures presented on the curved screen and the viewing distance are consistent, and the audience has a stronger sense of scene.

The curvature of the surface is the key to the problem. Each family has different TV screen size, viewing distance and viewing environment, so we must find the most suitable curvature. At present, the curvature of curved surface TV sold in the market is mostly 4000~4500r, which is the result of careful scientific calculation and experiment.

What is curvature?

The curvature of a curved TV is how curved the screen is. The radius value of the bending screen. The curvature 4000R refers to the degree of bending of a circle with a radius of 4m. Curvature can determine the image quality and live feeling of curved surface TV.

The smaller the value of curvature, the greater the bending amplitude.

The curvature of a perfect curved surface TV refers to the curvature of a circle with the radius of the best viewing distance. The viewer can view any part of the picture at the same distance with the best picture quality. The optimal viewing distance varies according to the size of the TV picture. The larger the TV picture, the larger the viewing distance.

ITU (International Telecommunication Union), TV manufacturers, bestbuy and other relevant organizations and departments believe that the best viewing distance should be 3 times the TV height or 2.5 times the diagonal of the TV picture. In this case, the best viewing distance for a 40 inch to 50 inch television is 1.5m~3m, and the best viewing distance for a 55 inch to 78 inch television is 2m~5m.

However, the audio-visual environment in which consumers live is the biggest variable. The area of the living room will not change with the size of the TV. It is impossible to chisel a hole in the wall of the living room in order to obtain the best viewing distance.

Therefore, curved surface TV manufacturers have conducted a series of Market Research on the building and living environment in China, the United States, South Korea, Europe and other countries. At the same time, they have also conducted in-depth research on the habit of watching TV and the living habits of various countries. In order to find the best curvature, a curved TV manufacturer spent a lot of manpower and material resources on one-to-one interviews with many consumers on the viewing mode.

Task 2: no deviation in image quality, search for extreme curvature

According to the report provided by China Institute of electronic standardization, when watching TV screens at the same distance, the contrast of curved TV screens is 48% higher than that of flat TV screens, and the brightness is 12% higher on average. Contrast, brightness, angle of view and many other data surface TVs comprehensively surpass plane TVs.

The core is to provide every viewer with high-definition images without image quality deviation. In the process of searching for the best curvature, the family gathered in the living room to watch TV, lying on the sofa to watch TV, sitting at the end of the living room to watch TV and other related situations were considered.

In order to ensure the curvature of “no dead angle & no picture deviation”, curved surface TV manufacturers even investigated and studied the length of sofa armrest and living room in ordinary families. On this basis, the TV size, living room area and other relevant data were integrated, and the in-depth research was carried out. Finally, the best audio-visual distance of 40 inch TV was 3m~3.5m, that of 55 inch TV was 3m~4m, that of 65 inch TV was 4m~5m, and that of 78 inch TV was 4.5m~6m.

Curved TV can provide viewers with a “concave audio-visual” experience, which is not available in flat TV. It can also be seen as the decisive factor that curved surface TV can quickly occupy the TV market.

The telepresence of curved TV is enhanced with the expansion of viewing angle, so telepresence is an important factor to determine the “drawing angle” or the best curvature. From the perspective of telepresence, the optimal curvature is determined after considering the drawing angle that changes with the picture size and audio-visual position. The maximum viewing angle curvature is to maximize the painting angle with the same left and right image quality,

The best curvature of different size curved surface TV is calculated.

4000R what is the golden curvature

This is the best curvature recognized by the curved TV industry. It is the same radian as the eye lens. This radian allows every point of the TV to reach the eye to be completely equidistant. It is the most comfortable TV curvature to watch. The curved surface design does have a sense of picture extension in a wider range. In my opinion, the visual extension of the curved areas on both sides makes the telepresence feel better than that of the flat panel TV.

The curvature of the surface is the key to the problem. Each family has different TV screen size, viewing distance and viewing environment, so we must find the most suitable curvature. At present, the curvature of curved surface TV sold in the market is mostly 4000r~4500r, which is the result of careful scientific calculation and experiment.

Golden curvature

Now, let’s talk about the golden curvature. The curvature of golden curved surface TV refers to the curvature of a circle with the radius of the best viewing distance. The viewer can view any part of the picture at the same distance with the best picture quality. The optimal viewing distance varies according to the size of the TV picture. The larger the TV picture, the larger the viewing distance.

According to the report provided by China Institute of electronic standardization, when watching TV screens at the same distance, the contrast of curved TV screens is 48% higher than that of flat TV screens, and the brightness is 12% higher on average. Contrast, brightness, angle of view and many other data surface TVs comprehensively surpass plane TVs.

Therefore, from the perspective of telepresence, the golden curvature is determined after considering the painting angle that changes with the picture size and audio-visual position. The maximum viewing angle curvature is to maximize the painting angle with the same left and right image quality.

At present, most of us watch TV at a distance of about 4 meters, so the 55 inch curved TV with a curvature of 4000R is the most perfect viewing effect. Therefore, 4000R has become the “golden curvature” of our curved TV.

How much screen curvature is appropriate

Since the surface technology first entered the display field in 2014, the surface display has been active ever since. The development of curvature digital also shows a direction of the development and evolution of the surface display. Since the second half of last year, 1800r curvature has become the standard configuration of surface display. Although Samsung used 1500r curvature in its flagship cf591 launched in the second half of last year, it has not been popularized. Why?

 

From 2014 to 2016, the curvature of curved display has rapidly increased from 4000R to 1800r, and has also entered the consumer market from a high-end product, which not only meets the consumers’ higher experience demand for display devices, but also meets the public consumers’ pursuit of differentiation. In the field of display, the advantage of curved screen is still very obvious, and the development of curved display once triggered the change of display.

The radian of the curved screen can ensure the equal distance between the eyes and the screen, more close to the physiological structure of the human eye, and can eliminate visual distortion, so as to create a more comfortable and broad visual experience for users. At the same time, the surrounding feeling brought by the surrounding visual effect is also the pursuit of consumers, and the greater the curvature, the more obvious and strong this effect. However, the newly launched curved displays are equipped with 1800r as standard, which is difficult to go further.

The curvature is not the greater the better

The smaller the curvature value, the greater the bending degree of the curved surface display, the greater the manufacturing process difficulty and the higher the cost. 1800r has almost become the right value for the development of curved display at present. It can not only make users feel an obvious sense of surrounding and encircling, but also has mature technology, and the cost price is acceptable to display manufacturers and consumers.



We know that although the current curved screen technology no longer directly and roughly “breaks” the screen as in the early days, but realizes the bending effect through the curved flexible screen technology, under the background of the existing LCD technology, it is obviously not worthwhile to continue to improve the curvature, increase the cost and fail to enter the consumer market. Before OLED technology is popularized in the display field, the curvature of curved display will not have much room for improvement.

 

In addition to the cost and price factors, the larger the curvature, the better. Considering the screen size of the LCD, the curvature of the circle with the best viewing distance as the radius is the curvature that best meets the needs of users. The excessively curved screen will not improve the user’s experience, but will be uncomfortable. This is one of the reasons why the curvature of the curved display is stable at 1800r.

3 surface development should be based on user experience

In addition to improving the curvature, the development of curved display still needs to grasp the pain points of users. On the one hand, in combination with 21:9 ultra wide screen, micro frame and other technologies, it continuously enlarges the surrounding effect of the curved display, which is the fundamental reason why the curved display has attracted the attention of users; On the other hand, it is also necessary to define the target population of the curved display itself.

In the display for positioning daily audio-visual and game entertainment, the blessing of curved surface elements is very beneficial. With visual advantages and immersion, “curved surface + large screen” and “curved surface + E-sports” have strong development prospects, while in the field of professional display, curved surface seems to have less advantages.

In addition, the curved screen is also very suitable for forming multiple screens such as triple screen. In addition, with the development of narrow borders on three sides of the display, the “seamless splicing” can bring more amazing effects, and give users a better sense of surround and immersion when playing games. At the moment when the development of curvature stagnates, this is the development direction of curved display.

epilogue

That’s all for the introduction of screen curvature. I hope this article can give you a more comprehensive understanding of screen curvature.

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