Four-color light-emitting diode (LED) display sub-pixel restructuring method

Abstract

The invention discloses a four-color light-emitting diode (LED) display sub-pixel restructuring method, and relates to an LED display. A single-frame high-resolution original image is sampled into a multi-frame image suitable for a low-resolution LED display through a pixel sampling algorithm aiming at three different LED display pixel structures of vertical stripes of red, green, blue and white (RGBW), a chessboard structure and a grid, and the image is displayed on the LED display. The brightness value shared by the RGB is replaced with a white LED by transforming the RGB color components of the separated low-resolution image into the luminance components of RGBW LED. The traditional pixel of the LED display is divided into single LED by using an LED display pixel restructuring technology, and adjacent LEDs of different pixels are restructured to form a new visual pixel. One-one mapping is carried out to each low-resolution image and the pixels of the LED with sub-pixels restructured, and the multi-frame low-resolution image is displayed in a mode of time division multiplexing.

Description

technical field [0001] The invention relates to an LED display screen, in particular to a method for recombining sub-pixels of a four-color LED display screen. Background technique [0002] As a high-efficiency, low-cost visual information carrier, LED display is constantly expanding its application fields. At the same time, the market's requirements for the resolution, color reproduction, power consumption, and stability of LED displays are also increasing. The use of RGBW four-color pixels can reduce the power consumption of the LED display by 11% to 33%, and can also enhance the color accuracy of the displayed image. However, compared with the RGB pixel structure, the number of LEDs in the RGBW pixel structure increases by 1 / 3, which increases the hardware cost of the LED display. At present, sub-pixel reorganization (also known as virtual pixel, pixel multiplexing, composite pixel, pixel sharing, pixel decomposition, etc.) technology is usually used to improve the resol...

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Problems solved by technology

[0007] Literature [1] only proposed a checkerboard RGBW pixel structure, and did not analyze and verify the other two existing RGBW pixel structures—vertical strip RGBW and grid tile (Pentile) RGBW; Literature [2] The sub-pixel reorganization method can only increase the resolution of the RGBW pixel structure display screen by 33%, and the practical application shows that this pixel structure is only suitable for image display with many color changes, low repeatability, and no attention to lines. For regular graphics, Pictures with obvious gradient effects are displayed poorly

Although the sub-pixel reorganization technology of 2R1G1B pixel structure in literature [3] is feasible, it requires 2 red sub-pixels, resulting in a waste of LEDs; although the sub-pixel reorganization technology in literature [4] uses a 1R1G1B pixel structure, the same number of LEDs In this case, it achieves a higher resolution than the literature [3], but it uses a hexagonal pixel structure and needs to change the structure of the LED display screen, so it cannot be directly applied to the existing LED display screen.

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