A control method of a multifunctional LCD display controller

Abstract

The invention discloses a multifunctional LCD display controller and a control method thereof. A display signal is input by an 8080 interface module and is buffered in a first FIFO buffering module, a video signal is input by a video interface module and is buffered in a second FIFO buffering module, a main control module controls a video processing module, a display processing module and a synthesizing and stacking module to process and synthesize the video signal and the display signal according to external control information, an OSD stacking module adds OSD characters to obtain finally synthesized data, and finally, a time sequence generating module displays the finally synthesized data on an LCD display screen according to a corresponding time sequence. The multifunctional LCD display controller and the control method thereof have the advantages of having multiple functions of matching multiple types of interfaces, image zooming, adjusting and stacking, and picture in picture display; when the multifunctional LCD display controller is applied to an image-video embedded system, information processing load of a preceding-stage system can be reduced, transportability is improved, and resource costs are reduced.

Description

technical field [0001] The invention relates to an LCD display technology, in particular to a multifunctional LCD display controller and a control method thereof. Background technique [0002] With the continuous development of image and video display technology, visual operation has become an important part of humanized experience in current embedded systems, and image and video embedded systems have been widely used. The image video embedded system mainly includes the front-end system (single chip microcomputer and ARM, etc.), LCD display controller (which can be directly integrated in the image video embedded system), memory, camera and LCD display. The LCD display controller is an indispensable and important part of the current image and video embedded system. With the improvement of multimedia display requirements, various functions and requirements have put forward higher requirements for LCD display controllers, such as image signal transmission display control, mult...

AI Technical Summary

Problems solved by technology

However, the existing LCD display controllers are mainly chip-type LCD display controllers, which have insufficient flexibility and a single input interface, so it is difficult to embed the above functions completely and flexibly. As a result, when the image and video embedded system realizes the above functions, Multi-type interface matching, image zoom adjustment and overlay, and picture-in-picture display can only be processed in the front-end system, and then input to the LCD display controller for processing after processing, which leads to a large amount of information processed by the front-end system, Weak portability and increased resource costs

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