LCD control system

Abstract

The present invention discloses a liquid crystal display controlling system, which comprises an output clock generating unit, a synchronous signal buffer memory unit, a synchronous signal reading unit, N video signal buffer memory units and an video signal output unit, wherein, the output clock generating unit can generate an output clock signal with a specific scaling according to the working mode of the liquid crystal display controlling system, the synchronous signal buffer memory unit is used for storing a data enabling signal and the like, which are capable of carrying out the signal synchronization on a row or a plurality of rows of video signals, the synchronous signal reading unit is used for reading the data enabling signal and the like, from the synchronous signal buffer memory unit according to the control time sequence requirement of liquid crystal display, and processing the data enabling signal and the like, in a scaling mode according to the specific scaling; the N video signal buffer memory units are used for storing 1 / N parts of a row or a plurality of rows of video signals; the video signal output unit is used for reading 1 / N parts of a row or a plurality of rows of video signals from the N video signal buffer memory units according to the output clock signal, the control time sequence of the liquid crystal display, and the data enabling signal and the like, processed in a scaling mode, processing each 1 / N part in a scaling mode according to the specific scaling, and outputting the signals processed in a scaling mode to outside.

Description

Technical field [0001] The invention relates to the field of video display, and more particularly to a liquid crystal display control system. Background technique [0002] In the existing liquid crystal display control chip (TCON), according to the size of the supported LCD screen, there are three output modes: single-port output, dual-port output, and four-port output. In dual port mode, the two ports output the first half line and the second half line of a line respectively. In the four-port mode, each port outputs a quarter of one line. When supporting the multi-port mode, the LCD control chip has a single line buffer unit to divide the video data of one line into two half lines or four quarter lines for output. [0003] The LCD screen with a fixed physical resolution also needs to support video input in different resolution formats. This function is realized by the scaling module (Scalor). When supporting both horizontal and vertical scaling, the scaling module needs to have ...

AI Technical Summary

Problems solved by technology

[0004] The existing technology adopts separate row buffer unit and scaling unit, which requires a larger memory to store video data separately, resulting in an excessively large chip area

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