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Video random access memory (VRAM) color liquid crystal display

A liquid crystal display, color technology, applied in the direction of static indicators, instruments, etc., can solve the problems of display interval or interruption, low screen reflection speed, slow video memory refresh speed, etc., and achieve the effect of improving the adaptability of use

Inactive Publication Date: 2012-03-21
河南友利华系统工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when ordinary TFT liquid crystal displays display large-scale high-speed data, due to the slow memory refresh speed and low screen reflection speed, display gaps or interruptions are prone to occur.

Method used

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  • Video random access memory (VRAM) color liquid crystal display
  • Video random access memory (VRAM) color liquid crystal display
  • Video random access memory (VRAM) color liquid crystal display

Examples

Experimental program
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Embodiment approach

[0012] Such as figure 1 The first embodiment of the present invention shown includes: a color liquid crystal module, the color liquid crystal module is connected to a liquid crystal driving circuit, and the liquid crystal driving circuit is connected to a CPLD data conversion logic circuit, and the described CPLD data conversion logic circuit is connected to a VRAM front memory and a VRAM background memory , the CPLD data conversion logic circuit is connected to the bus interface circuit, and the bus interface circuit is connected to the decoder. The bus interface is a 34-pin double row socket. Described PLD data conversion logic circuit runs following display scheduling control steps:

[0013] (1) The VRAM front memory stores the current frame display page, and the VRAM background memory stores the next frame display page;

[0014] (2) The VRAM foreground memory stores and exchanges data with the VRAM background memory, and the VRAM background memory stores subsequent frame...

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PUM

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Abstract

The invention relates to an industrial display, in particular to a video random access memory (VRAM) color liquid crystal display, which comprises a color liquid crystal module. The color liquid crystal module is connected with a liquid crystal driving circuit which is connected with a complex programmable logic device (CPLD) data conversion logic circuit, the CPLD data conversion logic circuit is connected with an VRAM foreground storage, an VRAM background storage and a bus interface circuit, and the bus interface circuit is connected with a decoder which enables display and data writing to be performed simultaneously, thereby achieving high-speed updating of pictures and being free of interference.

Description

technical field [0001] The invention relates to an industrial display, in particular to a VRAM color liquid crystal display. Background technique [0002] With the development of industrial automation, automation equipment is becoming more and more popular, covering almost all industrial fields. The color liquid crystal display is an important equipment for real-time monitoring of the operating parameters of industrial automation equipment. It displays the real-time parameters of equipment operation in the form of vivid text, instruction graphics, curves, numbers, tables, etc., so that equipment control personnel can intuitively and conveniently grasp the real-time information of the industrial site. equipment operating parameters. [0003] Currently used displays include: CRT (picture tube), TN (black and white and monochromatic night crystal), STN (pseudo-color liquid crystal) to meet the display requirements of modern equipment. However, when ordinary TFT liquid crystal...

Claims

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Application Information

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IPC IPC(8): G09G3/36G09G3/18
Inventor 吴晓北谭本宏
Owner 河南友利华系统工程有限公司