Mobile Phone OLED Screen Pixel Arrangement

July 19, 2022

1. Pentile arrangement and diamond arrangement

The RGB pentile arrangement is derived from RGB. In the OLED panel, the device made of the blue material of the light-emitting device, because it is an organic substance, has a shorter lifespan than red and green, and the blue device decays more severely than the other two colors after a long time of use, resulting in color distortion and aging of the panel. So Samsung developed the pentile arrangement, which doubled the blue pixels in one pixel, increased the area, and extended the life. Because the human eye is more sensitive to green, in order to balance the color display effect, the red sub-pixels are also doubled in size. This is the pentile arrangement.

The pentile arrangement is to increase the red and blue sub-pixels and maintain the original green sub-pixel size. One pixel is still composed of three sub-pixels of red, blue, and green, so that the effective pixel in the same area is about 70% of the standard RGB pixel. That is, the display granularity is not as delicate as the standard RGB. So Samsung later developed the diamond arrangement. This arrangement is also a pentile arrangement.

The effective pixels of the diamond arrangement can be increased to 80% of the standard RGB arrangement, and the display effect is more delicate than the pentile.

2. Delta arrangement

Delta arrangement was developed by Chinese manufacturers, because Samsung has patents on pentile arrangement and diamond arrangement, Chinese manufacturers can't use it and developed delta arrangement by themselves. Manufacturers such as Visionox and Tianma are using this arrangement

 

The Delta arrangement is closer to the traditional RGB arrangement. In actual use, the vertical stripes will be obviously blurred (essentially because of the lack of green pixels). The actual pixel density is also about 70% of the standard RGB arrangement, and the display is not very delicate.

3. BOE arrangement

The BOE arrangement is jokingly called "Zhou Dongyu Array" because the pixel arrangement is similar to Zhou Dongyu's expression, which is currently used by BOE manufacturers. Huawei P30 uses this screen. The display effect of this one is also not very delicate

After comparing the arrangement of the various pixels, it is clear that Samsung's is better. It is undeniable that the Samsung Diamond Pentile arrangement is the best screen arrangement at present.

However, whether a screen is good or not depends only on the pixel arrangement, but also considers the color gamut, color accuracy, refresh rate and the manufacturer's later adjustment. China's technology has been improving all the time, and I believe that better screens will be developed in the future.



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