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LED display screen gray scale display driving module and method

A technology of LED display and drive module, applied in static indicators, instruments, etc., can solve the problems of flickering of images, limited refresh rate, affecting picture quality, etc.

Pending Publication Date: 2021-03-19
CHENGDU LIPPXIN MICROELECTRONIC CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

This makes the number of PWM groups displayed in one display frame period fixed, and the resulting refresh rate is also fixed and limited, which makes the displayed image prone to flickering and affects the picture quality.

Method used

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  • LED display screen gray scale display driving module and method
  • LED display screen gray scale display driving module and method
  • LED display screen gray scale display driving module and method

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Embodiment Construction

[0046] The technical solution of the present invention will be further described in detail below in conjunction with specific examples, but the protection scope of the present invention is not limited to the following description.

[0047] An LED display screen grayscale display drive module, including: a first PWM generation module 100 and a second PWM generation module 200 , and a PWM synthesis module 300 connected to the first PWM generation module 100 and the second PWM generation module 200 . Its structure can refer to figure 1 shown. Specifically, the input terminals of the first PWM generation module 100 and the second PWM generation module 200 are used to input grayscale data, and the output terminals of the first PWM generation module 100 and the second PWM generation module 200 are connected with the PWM synthesis module 300 is connected to the input end, and the grayscale data becomes PWM data corresponding to the grayscale in the first PWM generation module 100 an...

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Abstract

The invention relates to an LED display screen gray scale display driving module and method. The LED display screen gray scale display driving module comprises a first PWM generation module 100, a second PWM generation module 200 and a PWM synthesis module 300 connected with the first PWM generation module 100 and the second PWM generation module 200. In a display frame period, the corresponding gray scale data is divided into first gray scale data which are circularly displayed and second gray scale data with a fixed group number N; wherein the first gray scale data is high gray scale data, the second gray scale data is low gray scale data, in the same video frame, after all the high gray scale data and all the low gray scale data of the gray scale data are displayed, the high gray scaledata and the low gray scale data are repeatedly and circularly displayed until the next frame arrives, the display refresh rate is increased, and the visual effect is enhanced; the image flicker can be effectively reduced, and image stability is improved.

Description

technical field [0001] The invention relates to the technical field of LED display drive technology, in particular to a grayscale display drive module and method for an LED display screen. Background technique [0002] Grayscale uses black tones to represent objects, that is, black is used as the reference color, and black with different saturations is used to display images. Each grayscale object has a brightness value from 0% (white) to 100% (black) on the grayscale bar. For example, pixel values ​​are quantized and represented by one byte (8b). For example, the gray value with continuous change of black-gray-white is quantized into 256 gray levels, and the range of gray value is 0~255, indicating that the brightness is from dark to light, corresponding to the color in the image from black to white. Black-and-white photos contain all grayscale tones between black and white, and each pixel value is one of 256 grayscales between black and white. The refresh rate of the gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G3/32
Inventor 唐永生高兴波
Owner CHENGDU LIPPXIN MICROELECTRONIC CO LTD
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