Liquid crystal display driver for high-resolution interlacing scanned video signals

Abstract

The invention discloses a liquid crystal display driver for high-resolution interlacing scanned video signals. The liquid crystal display driver comprises an interlacing video input module, a field programmable gate array (FPGA) module, a synchronous dynamic random access memory (SDRAM), a brightness control module, a line-by-line video output module, a low voltage differential signaling (LVDS) liquid crystal screen logic board interface module, a crystal oscillator and a power supply module, wherein the interlacing video input module samples the interlacing scanned video signals from a videoinput interface and performs analog / digital conversion; the FPGA module is connected with the interlacing video input module and receives the interlacing scanned video signals converted by the interlacing video input module; the SDRAM is connected with the FPGA module through a bus and stores the interlacing scanned video signals; the brightness control module is connected with the FPGA module; the line-by-line video output module is connected with the FPGA module; the LVDS liquid crystal screen logic board interface module is connected with the FPGA module; the crystal oscillator is connected with the FPGA module; and the power supply module is connected with the FPGA module and the like and provides an analog direct-current power supply and a digital direct-current power supply. The liquid crystal display driver realizes point-to-point display of the high-resolution interlacing scanned video signals on a liquid crystal display.

Description

technical field [0001] The invention relates to a liquid crystal display technology, in particular to a liquid crystal display driver for high-resolution interlaced scanning video signals. Background technique [0002] In recent years, the technology of liquid crystal display has developed rapidly. The traditional CRT (Cathode Ray Tube, cathode ray tube) display has been gradually replaced by liquid crystal display. The 16:9 widescreen liquid crystal display has become a popular choice in the fields of home audio-visual, game entertainment, and industrial display applications. mainstream. LCD monitors require the input of progressive scan video signal format, while traditional CRT monitors generally use interlaced scan, and the input signal is an analog interlaced video signal. High-resolution interlaced video signals such as 1024×768 and 1280×1024 resolutions are mainly derived from the video formats used by some industrial CRT display devices and marine CRT radars. These ...

AI Technical Summary

Problems solved by technology

If this professional chip is used for high-resolution interlaced video signals, it cannot be put into practical use because the display of converted images and text on the liquid crystal display is far less clear than that on the original CRT display.

[0006] In addition, the existing liquid crystal display mainly controls the display brightness by adjusting the brightness of the backlight of the liquid crystal screen, and the brightness of the backlight of the liquid crystal display can only be adjusted within the range of 30% to 100% of the maximum brightness, and the brightness adjustment range is very limited and cannot be adjusted. to full black brightness levels

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