Liquid crystal display controller for keeping fixed aspect ratio

Abstract

This invention relates to a CLD controller keeping width-height ratio of a fixed image, which mainly relates to a circuit and a method for keeping a fixed image width-height ratio, among which, lines are added on the top and bottom of the display vertically to let the display picture have the image width-height ratio same to the input image, a line exciting signal is used to expand the vertical line to maintain the ratio, the signal period of a line exciter is varied according to the ratio of the input image to expand it necessarily, so that the ratio of the display image is in conformity of the source image.

Description

technical field [0001] The present invention relates to a liquid crystal display controller that maintains a fixed image aspect ratio, which is used to maintain a fixed image aspect ratio when the image source size is different from the display screen size and is intended to be converted into a specific display size image circuits and methods. Background technique [0002] according to, Figure 1a It is a common schematic diagram of a circular source image 110 of a computer display with a specific resolution being enlarged into a larger frame 120 through an enlargement program 150. It can be seen from this figure that the image on the enlarged display has been distorted and no longer looks like a circle , and resembles an ellipse 120. The original source image is stored in an extended graphics array (XGA) format of 1024 x 768 pixels. The image aspect ratio of the resolution 1024×768 is 1024 / 768=4 / 3; and Figure 1a The screen size of the display in the above is 1280×1024 or...

AI Technical Summary

Problems solved by technology

In common technology, when converting VGA, XGA and UXGA signals to the SXGA display screen, there is a problem of image aspect ratio inconsistency to be solved

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