The awful truth about AMOLED screens :)
Recently, AMOLED screens have become increasingly widespread. What is AMOLED? This abbreviation is revealed as Active-Matrix Organic Light Emitting Diode (that is, an active matrix on organic light-emitting diodes). The main advantage of such screens is that they emit light themselves, that is, they do not need backlighting from the reverse side. This provides AMOLED screens with a number of advantages:
1) Higher brightness (there are no losses that appear in the LCD screens when light passes through the screen).
2) Excellent black level (since black pixels do not glow at all; in the LCD screens, the light from the backlight continues to pass through them) and excellent contrast.
3) Huge viewing angles.
Samsung is one of the technology holders and the largest manufacturer of AMOLED screens for mobile devices. In the production of its AMOLED screens, Samsung uses a special subpixel layout scheme.
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As you know, in conventional LCD screens, each pixel consists of three subpixels (red, green, blue). In Samsung's AMOLED screens, each pixel consists of only two subpixels. Here's what it looks like:
(TFT on the left, AMOLED on the right)
Why does this scheme work? The fact is that the human eye is most sensitive to green. It is green that is responsible for the spatial resolution, while blue and red are used to obtain almost exclusively color information about the object. (That is why manufacturers of equipment with blue indicators should burn in hell. Indicators should be green.) As a result, the AMOLED screen with the subpixel arrangement shown above has full spatial resolution, but its third color resolution is inferior to TFT screens with the same resolution and the traditional location of subpixels. That is why AMOLED screens in their current form are unlikely to be used where high display accuracy is required.
By the way, the matrix of digital cameras are arranged in a very similar way: the pixels that are sensitive to green are twice as large as the pixels that are sensitive to red or blue. The resulting full-color picture is obtained using the so-called Bayer interpolation. The only exceptions are Foveon matrices - they use an equal number of pixels of all colors layered above each other.
1) Higher brightness (there are no losses that appear in the LCD screens when light passes through the screen).
2) Excellent black level (since black pixels do not glow at all; in the LCD screens, the light from the backlight continues to pass through them) and excellent contrast.
3) Huge viewing angles.
Samsung is one of the technology holders and the largest manufacturer of AMOLED screens for mobile devices. In the production of its AMOLED screens, Samsung uses a special subpixel layout scheme.
')
As you know, in conventional LCD screens, each pixel consists of three subpixels (red, green, blue). In Samsung's AMOLED screens, each pixel consists of only two subpixels. Here's what it looks like:
(TFT on the left, AMOLED on the right)
Why does this scheme work? The fact is that the human eye is most sensitive to green. It is green that is responsible for the spatial resolution, while blue and red are used to obtain almost exclusively color information about the object. (That is why manufacturers of equipment with blue indicators should burn in hell. Indicators should be green.) As a result, the AMOLED screen with the subpixel arrangement shown above has full spatial resolution, but its third color resolution is inferior to TFT screens with the same resolution and the traditional location of subpixels. That is why AMOLED screens in their current form are unlikely to be used where high display accuracy is required.
By the way, the matrix of digital cameras are arranged in a very similar way: the pixels that are sensitive to green are twice as large as the pixels that are sensitive to red or blue. The resulting full-color picture is obtained using the so-called Bayer interpolation. The only exceptions are Foveon matrices - they use an equal number of pixels of all colors layered above each other.
Source: https://habr.com/ru/post/91991/
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