Circuit Structure of Dual Video Signal Sequence Generator with External Synchronization Function

A technology for generating circuits and synchronizing signals. It is used in television, electrical components, image communication, etc. It can solve the problems of video asynchrony, black screen or splash screen, etc., and achieve the effect of eliminating black screen or splash screen.
CN108616674BActive Publication Date: 2020-10-20XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
Publication Date
2020-10-20

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Abstract

The invention belongs to an integrated circuit design technology, and provides a dual-channel video signal time sequence generation circuit structure with an external synchronization function. In order to meet requirements of a graphics processing unit for dual-channel video output and the external synchronization function, the dual-channel video signal time sequence generation circuit structure can simultaneously generate two channels of output video signals conforming to VESA (Video Electronics Standards Association) video time sequence standards and support synchronous refresh of output video frames with external frame synchronization signals. In addition, the dual-channel video signal time sequence generation circuit structure has a function of enabling the two channels of output videoto keep synchronization or simultaneously keep synchronization with the external frame synchronization signals, so that a phenomenon of a blank screen or a flash screen which possibly occurs in the switching between different video signals can be effectively eliminated when switching is required to be performed between the two channels of output video and video signals which keep synchronizationwith the external synchronization signals, thereby realizing seamless switching between the video signals.
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Description

Technical field

[0001] The invention belongs to integrated circuit design technology, a dual-channel video signal timing generating circuit structure with external synchronization function. Background technique

[0002] Graphics processor usually has dual-channel video output function, which can output two channels of video at the same time. The two channels of video can have different resolutions, frame frequencies and video data for different applications such as dual-channel independent display or dual-channel extended display. Scenes. In the aircraft cockpit display system, the display video needs to be switched frequently, but the frames of the switched videos are not synchronized, which may cause a black screen or a flickering screen when the video is switched. Summary of the invention

[0003] The purpose of the present invention is to propose a dual-channel video signal timing generation circuit structure with external synchronization function, eliminate the black screen ...

Claims

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