A Realization Method of Graphic-Text-Video Mixed Display Driver

A display driver and video mixing technology, applied to static indicators, instruments, etc., can solve problems such as interference, long development cycle, high development cost, etc., and achieve the effect of improving stability, reducing complexity, and reducing memory requirements

Inactive Publication Date: 2016-01-13
SOUTHEAST UNIV
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AI Technical Summary

Problems solved by technology

The use of memory management, operating system and other units can make liquid crystal display more diversified, but for many relatively simple application backgrounds, high development costs and long development cycles are also the reasons why it is difficult to popularize in many fields
In addition, in many engineering applications with complex environments, interference is also a problem that must be considered and solved

Method used

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  • A Realization Method of Graphic-Text-Video Mixed Display Driver
  • A Realization Method of Graphic-Text-Video Mixed Display Driver
  • A Realization Method of Graphic-Text-Video Mixed Display Driver

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Embodiment Construction

[0027] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0028] The video decoding data can be obtained by a common decoding chip, and the memory includes but not limited to SRAM or SDRAM, and its different forms and combinations do not limit the present invention.

[0029] The overall implementation method of the graphics, text and video mixed display driver implemented by the present invention is as follows: figure 1 . The external controller 101 is used to send control instructions to the graphic-text-video mixed display driver implemented in the present invention, including display mode selection, graphic-text writing mode selection, coordinate point address to be displayed and RGB color data setting. The video data 102 is obtained by the video decoding chip, including 24bitRGB data and line and field synchr...

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Abstract

The invention discloses a method for realizing a graphic video mixing display driver. The method comprises the steps that a single-chip complex programmable logic device (CPLD) or a field-programmable gate array (FPGA) is adopted to drive a liquid crystal display, graphic data to be displayed and graphic video display zone bits in line and field signal blanking sections of the liquid crystal display are stored in a data storer through analysis of a parallel communication bus instruction sent by an external controller, and signals are output according to a display mode and the graphic video display zone bits in the line and field signal blanking sections. According to the method for realizing the graphic video mixing display driver, a cheap and efficient graphic video mixing display driver realizing scheme is provided, decoded video data do not need to pass through the storer, requirements for internal storage of the storer are greatly reduced, stability and universality of the graphic video mixing display driver are improved, and the driver can be realized without a high-density CPLD or FPGA.

Description

technical field [0001] The invention belongs to the field of liquid crystal display drives, and in particular relates to a method for realizing a graphic-text-video mixed display driver. Background technique [0002] LCD graphics, text and video mixed display has been widely used in various industrial instrument displays, such as automobiles, mining vehicles, pipeline robots, construction machinery and other equipment that require human-computer interaction display. [0003] At present, the application development of general graphics, text and video mixed display drivers is mainly divided into two directions: [0004] (1) Using a dedicated LCD driver chip [0005] This type of chip integrates video decoding and LCD drive functions, such as the ASIC produced by Taiwan's MSTAR and Guangdong's Aike. This method is suitable for a single video display occasion, or a simple preset OSD windowing process, and has low versatility for mixed display drivers in general occasions. In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36
Inventor 冒建亮叶桦尤卫卫孙晓洁
Owner SOUTHEAST UNIV
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