Image processing method and device for LED display screen

A technology of LED display screen and image processing device, which is applied in the direction of static indicators, instruments, etc., can solve the problems of image instability and flickering, poor brightness uniformity, and lower refresh rate, so as to improve viewing comfort and improve image quality. The effect of display quality

Active Publication Date: 2017-07-28
HANGZHOU SHIXIN TECH CO LTD
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Problems solved by technology

[0005] However, due to the limitations of the physical characteristics of LEDs and manufacturing processes, the brightness uniformity of LEDs becomes poor when they work with small currents or narrow pulses.
Although the number of LED lights per unit time can be reduced by reducing the refresh rate to reduce the brightness, but the reduction of the refresh rate leads to an unstable flickering feeling of the image

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  • Image processing method and device for LED display screen
  • Image processing method and device for LED display screen
  • Image processing method and device for LED display screen

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Embodiment Construction

[0037] Various embodiments of the invention will be described in more detail below with reference to the accompanying drawings. In the various drawings, the same elements are denoted by the same or similar reference numerals. For the sake of clarity, various parts in the drawings have not been drawn to scale.

[0038] figure 1 A schematic block diagram of the LED display screen 100 is shown. The LED display screen 100 includes an LED display controller 110 and N serially connected LED unit boards 120 , where N is an integer greater than or equal to 1. Each LED unit board 120 includes A LED driving circuits 121, and each LED driving circuit 121 is used to drive B LEDs 121, where A and B are integers greater than or equal to 1 respectively. Therefore, the LED display screen 100 can drive a total of N*A*B LEDs 121 .

[0039]The LED display controller 110 provides grayscale data DATA to the LED unit board 1201 , and provides a set of control signals to the LED unit board 120 r...

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Abstract

An image processing method and device for an LED display screen are disclosed. The method converts original data of an image into gray scale data, and comprises the steps of dividing a pixel unit of the image into a plurality of sub-regions; and combining the plurality of sub-regions respectively, so that the gray scale value of at least a portion of the pixel unit is increased while the overall gray scale value of the plurality of sub-regions is maintained. By combining the sub-regions of the image, the method can reduce the brightness of the LED display screen without reducing the refresh rate so as to improve the viewing comfort and improve the image display quality.

Description

technical field [0001] The present invention relates to LED display technology, and more particularly, to an image processing method and device for LED display screens. Background technique [0002] LED display has the following advantages: high grayscale, wide viewing angle, rich colors and customizable screen shape. Therefore, LED display screens are widely used in various fields such as industry, transportation, commercial advertisements, information release, and sports competitions. [0003] The pixel elements used in LED displays are LEDs. Due to the physical characteristics of LEDs, the brightness of LED light is related to the driving current. For example, a current control method and a conduction time control method are used to realize multi-level gray scales. In the current control method, the gray scale is controlled by adjusting the current flowing through the LED. The on-time control method is to control the gray scale of the LED by changing the duty cycle un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G3/32G09G2320/0276
Inventor 许明薛孔令军
Owner HANGZHOU SHIXIN TECH CO LTD
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