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Grayscale display driving method and device for LED display

An LED display and display driver technology, applied in static indicators, instruments, etc., can solve the problems of reducing the refresh rate of the display screen and deteriorating the visual effect.

Active Publication Date: 2017-06-27
HANGZHOU SILAN MICROELECTRONICS
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Problems solved by technology

Although the grayscale resolution of low effective bits can be improved by increasing the grayscale levels after gamma correction, such as 20bit or even higher, but too high grayscale levels will seriously reduce the refresh rate of the display screen, and the visual effect will be changed. Difference

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  • Grayscale display driving method and device for LED display
  • Grayscale display driving method and device for LED display
  • Grayscale display driving method and device for LED display

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Embodiment Construction

[0042] 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.

[0043] figure 1It is a schematic block diagram of a conventional LED display. The LED display includes an LED display controller and N serially connected LED unit boards 1 to N, wherein N is an integer greater than or equal to 1. Each LED unit board includes A LED driving circuits, and each LED driving circuit is used to drive B LEDs, where A and B are integers greater than or equal to 1 respectively. Therefore, the LED display can drive a total of N*A*B LEDs.

[0044] The LED display controller provides the data signal DATA to the LED unit board 1, and provides a set of control signals to the LED unit board 1 to the LED unit board N respectively, including a clock ...

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Abstract

The invention discloses a gray level display driving method and device for an LED display. The gray level display driving device comprises a gray level calculation module, a remainder digit weight construction module, a subframe data generation module and a subframe signal output module. The gray level calculation module is used for calculating gray level data which are corrected, and the gray level data include the gray level value expressed by high significant digit data and the gray level value expressed by a remainder digit. The remainder digit weight construction module sets the subframe weight of the remainder digit in each subframe and calculating the digit value of the remainder digit in each subframe according to the gray level value expressed by the remainder digit. The subframe data generation module generates a plurality of subframe weight sequences and a plurality of subframe digit numerical value sequences. The subframe signal output module outputs gray level driving signals of the subframes one by one according to the subframe weight sequences and the subframe numerical value sequences so as to drive LEDs on the LED display, and the subframe weighs of the remainder digit in at least two different subframes are different. According to the gray level display driving method and device, the refreshing rate of the display can be improved, and the gray level resolution ratio of a low significant digit is improved.

Description

technical field [0001] The present invention relates to LED display technology, more specifically, to a grayscale display driving method and device for LED displays. Background technique [0002] The pixel elements used in LED displays are LEDs. LED displays have the following advantages: high gray scale, wide viewing angle, rich colors and customizable screen shape. Therefore, LED displays are widely used in various fields such as industry, transportation, commercial advertising, information release, and sports competitions. [0003] In order to adapt to the luminous and electrical characteristics of LEDs, corrections must be made before the video signal is supplied to the LED display. Human eyes and equipment have different senses of distinguishing gray level differences. The human eye is sensitive to low gray level differences and cannot clearly distinguish high gray level differences. Therefore, it is necessary to perform nonlinear visual correction on LEDs, compress ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32
Inventor 斯斐霞孙熙文赵启永刘志峰
Owner HANGZHOU SILAN MICROELECTRONICS
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