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The method of changing the gray scale space of led display screen and the timing generator used

A timing generator and grayscale space technology, applied to static indicators, instruments, etc., to achieve the effects of reducing device costs, alleviating insufficient hardware processing capabilities, and expanding grayscale space

Inactive Publication Date: 2017-01-25
TIANJIN HAOTIAN ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a method for changing the gray scale space of the LED display screen and a timing generator used in the method. In the wide case, the gray scale space is expanded, the device cost is reduced, and the problems caused by insufficient hardware processing capacity are alleviated.

Method used

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  • The method of changing the gray scale space of led display screen and the timing generator used
  • The method of changing the gray scale space of led display screen and the timing generator used
  • The method of changing the gray scale space of led display screen and the timing generator used

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Embodiment 1

[0037] use as Figure 4 In the design framework shown, the data source is connected to the data memory, the timing generator is connected to the 8bit counter, the data source memory is compared with the 8bit counter, and the obtained pulse signal controls the on-off of the LED switch. Different data sources are gray After the brightness value passes through the comparator, pulses with different duty ratios are obtained to realize the gray scale change of the LED display. Select a built-in PWM modulation driver chip with the same bit width as the data source, which is the carrier of the data memory.

[0038] In terms of drive timing implementation, the data is imported into the storage space where the 8-bit depth and 14-bit width lookup table is located through the host computer or the memory bank, and the cycle is T 0 The pulse is counted to the 14bit bit width counter. When the value of the counter is the same as the value of the corresponding position of the lookup table, t...

Embodiment 2

[0045] use as Figure 6 In the design framework shown, the data source is connected to the data memory, the timing generator is connected to the 8bit counter, the data source memory is compared with the 8bit counter, and the obtained pulse signal controls the on-off of the LED switch. Different data sources are gray After the brightness value passes through the comparator, pulses with different duty ratios are obtained to realize the gray scale change of the LED display. Select a built-in PWM modulation driver chip with the same bit width as the data source, which is the carrier of the data memory.

[0046] In terms of drive sequence implementation, the data is imported into the storage space where the lookup table with 10bit depth and 14bit width is located through the host computer or memory bank, and the cycle is T 0 The pulse is counted to the 14bit bit width counter. When the value of the counter is the same as the value of the corresponding position of the lookup table,...

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Abstract

The invention discloses a method for changing the gray level space of an LED display screen and a time sequence generator used in the method. According to the method, the display screen is driven by a clock which meets certain function relationship, so that the gray level space is widened on premise that the data source bit width is not changed; the device cost is lowered; and the problems caused by insufficient hardware processing capacity are solved. The invention further discloses the time sequence generator for generating the clock.

Description

technical field [0001] The invention relates to a method for changing the gray scale space of an LED display screen and a timing generator adopted therefor, and belongs to the technical field of LED display screen display control methods. Background technique [0002] As the terminal of multimedia display, LED display is more and more favored by indoor large-screen users, and it is expected to become a new generation of display carrier to replace projection. [0003] Due to the visual characteristics of the human eye, the change in LED brightness may not be perceived by the human eye, but the brightness acquisition device can capture it, that is to say, the brightness change that can be perceived by the brightness device may not be perceived by the human eye. Such as LED display brightness from 2000cd / m 2 Raise to 2020cd / m 2 , the device can collect it, but it is difficult for the human eye to perceive it. The greater the brightness, the more obvious this phenomenon is. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32
Inventor 严飞刘银萍赵兴强宋公飞
Owner TIANJIN HAOTIAN ELECTRONICS TECH CO LTD