Faced with the booming MLED market, there are still process and cost issues that need to be solved urgently in the industry's products.
1. Process difficulty issues
As LED display modules develop towards smaller pitches, the difficulty and complexity of the production process will increase. For example, for displays with smaller spacing, the number of LED light-emitting chips per unit area will increase exponentially, which places higher requirements on PCB drilling and layout production of LED display modules.
2. The production cost problem is developing towards smaller spacing. The number of light-emitting chips required for the same size display screen will increase, the number of layers of PCB boards used will also increase, and the production cost will further increase.
In order to improve the above problems, the LED display industry has introduced virtual/sub-pixel screen design solutions. It can achieve higher resolution display through dynamic sub-pixel rendering technology, bringing better display effects.
What is dynamic sub-pixel rendering technology?
To put it simply, we call each luminous unit on the LED screen a pixel, which is a combination of three color luminescent chips of RGB. The luminescent chip of a single color in the pixel is called a "sub-pixel".
In ordinary real pixels, the three sub-pixels of RGB are generally arranged in a line from top to bottom. Unlike conventional real-pixel display technology, each pixel in a virtual/sub-pixel screen contains only one or two sub-pixels. By borrowing sub-pixels within adjacent pixels, RGB pixels can be synthesized to achieve image rendering and display.
Currently, the mainstream virtual/sub-pixel screen arrangements in the LED display market are three-light, four-light, and arrangements based on their changes. Take the common vertical arrangement of four lights RGGB and three lights Delta1 as an example., let’s take a look at the display principle of virtual/sub-pixel display using dynamic sub-pixel rendering technology.
1. Principle of four-light RGGB dynamic sub-pixel rendering technology
As shown in the left picture above, in the real pixel arrangement, the three RGB sub-pixels in each black box form a complete pixel for content display.
As shown in the picture on the right above, taking the four-light RGGB arrangement as an example, there is only one sub-pixel in each black frame. Through advanced dynamic sub-pixelRendering technology can flexibly deploy surrounding sub-pixels according to the image content, so that one sub-pixel can display complete pixel content. Compared with real pixels, when four lights are arranged in RGGB and each (RGB) pixel only adds one sub-pixel (G), a 4-fold display effect can be achieved.
2. Principle of three-lamp Delta1 longitudinal dynamic sub-pixel rendering technology
As shown in the right picture above, taking the three-lamp Delta1 vertical arrangement as an example, there are one or two sub-pixels in each black box. Through dynamic sub-pixel rendering technology, surrounding sub-pixels can be flexibly seconded, so that one or two sub-pixels can display complete pixel content at the corresponding position. Compared with real pixels, changing the relative position of sub-pixels in each (RGB) pixel can achieve a display effect that is doubled horizontally or vertically.
What are the advantages of dynamic sub-pixel rendering technology?
1. Resolution doubled
Under the same size, by changing the arrangement and number of sub-pixels, the screen using dynamic sub-pixel rendering technology can achieve smaller spacing and larger resolution display.
△ 4-light RGGB arrangement can achieve 4 times the display resolution △
3. Improved display effect
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