Synchronous displaying device, synchronous displaying method and superposition splice displaying system

Abstract

The invention provides a synchronous displaying device, a synchronous displaying method and a superposition displaying system, wherein the frame synchronous signal of each displaying signal output device is transmitted to a frame synchronous control circuit by the superposition control circuit; the frame synchronous control circuit measures the time difference of the arriving time of each frame synchronous signal and a reference frame synchronous signal, and sends an adjusting command produced according to the time difference to the clock synchronous control circuit, which adjusts the clock frequency of the clock output channel corresponding to the relative displaying signal output device. Each displaying signal output device of the invention is connected with each clock output channel ofthe same clock synchronous control circuit, and produces a plurality of clock outputs comprising the same frame and the same phase with a reference clock through the reference clock signal of the same clock synchronous control circuit, therefore, the clock signals of each displaying card are synchronous. Because of using the same reference clock signal, no clock error and accumulative error exists, and the veracity of the synchronous displaying signals is improved.

Description

technical field [0001] The present invention relates to the technical field of image display, in particular to a synchronous display device, a synchronous display method, an overlay display system and a splicing display system. Background technique [0002] The patent application with application number 200810198074.5 and publication number CN101383913A discloses a display superimposition control system and its control method. The system includes a superposition control circuit, a frame synchronization control circuit, a display and at least two display signal output devices. Each display The display output terminal of the signal output device is electrically connected with the superposition control circuit, the frame synchronization control circuit is electrically connected with the control signal input terminal of each display signal output device, and the superposition control circuit is electrically connected, the superposition control circuit is electrically connected wi...

AI Technical Summary

Problems solved by technology

However, for all kinds of mature display cards, especially for GPU display cards, it is extremely difficult to modify their parameters. Most manufacturers do not allow customers to modify local parameters. The setting of the display parameters is completed, so the response time is not timely, and the output will be terminated in an instant, but the displayed image shakes or an instant black screen or an instant blurred screen

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