Scanning card, LED display screen control system, and image data processing method

A technology of LED display and image data, applied in static indicators, instruments, etc., can solve the problems of difficulty in realizing low Bit grayscale, discontinuous grayscale display effect, etc., and achieve the effect of reducing influence and smooth grayscale transition.

Active Publication Date: 2018-01-09
XIAN NOVASTAR TECH
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Problems solved by technology

Since it is difficult to realize the low-bit grayscale of the LED light board driver chip, discarding it directly will inevitably result in a discontinuous grayscale transition display effect

Method used

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  • Scanning card, LED display screen control system, and image data processing method
  • Scanning card, LED display screen control system, and image data processing method
  • Scanning card, LED display screen control system, and image data processing method

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Embodiment Construction

[0025] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] The following embodiments of the present invention aim at the problem of low Bit (bit) information loss in the framework of the function realization principle of the scanning card in the prior art, and improve it in combination with the rotation jitter matrix algorithm, by several adjacent video image frames Different rotation and dithering matrices are used for processing, so that the grayscale effect of pixels at adjacent positions remains unchanged, and the overall tone continuity effect is achieved.

[0027] In order to facilitate the understanding of the present invention, a rotation dithering matrix algorithm adopted in the embodiment of the present invention is described as follows:

[0028] Digital halftone technology is...

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Abstract

The invention proposes a scanning card, an ED display screen control system employing the scanning card, and an image data processing method. Aiming at a problem of low-Bit gray scale loss in the prior art, the invention proposes a mode of enabling a rotating jitter matrix processing algorithm to be used in the function implementation of the scanning card. The mode comprises the steps: adding a Bit optimization module on the scanning card, and employing different rotating jitter matrixes for the processing of different video image data frames, thereby achieving the more complete expression ofthe information of an original video image during the conversion from high-bit-width data to low-bit-width data, reducing the impact from the unfulfilment of the low Bit of the drive chip on the grayscale expression, and enabling the gray scale transition to be smoother.

Description

technical field [0001] The invention relates to the technical field of video image processing, in particular to a scanning card, an LED display screen control system and an image data processing method. Background technique [0002] At present, when the control system reduces the brightness of the LED display, low-bit grayscales are usually lost, resulting in discontinuous display tones. [0003] Due to the linear response characteristics of LEDs, the current LED display control needs to perform inverse gamma (Gamma) correction on the input n-bit grayscale data and map it to m-bit grayscale data before performing grayscale implementation (m>n). Let x be the input grayscale data, and the value range is from 0 to (2 n -1), y is the grayscale data after inverse gamma correction, and the value range is from 0 to (2 m -1), γ is the Gamma value, and the mapping relationship is as follows: [0004] [0005] When it is necessary to reduce the brightness of the LED display s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
Inventor 刘德福梁伟
Owner XIAN NOVASTAR TECH
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