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Method and device for regulating horizontal synchronous signal and vertical synchronous signal

A technology of vertical synchronous signal and horizontal synchronous signal, which is applied in the direction of image communication, color TV parts, TV system parts, etc., and can solve irresponsible problems

Inactive Publication Date: 2004-02-18
AMTRAN TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, it would be too irresponsible to leave such factors that seriously endanger the image quality to chance and luck.

Method used

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  • Method and device for regulating horizontal synchronous signal and vertical synchronous signal
  • Method and device for regulating horizontal synchronous signal and vertical synchronous signal
  • Method and device for regulating horizontal synchronous signal and vertical synchronous signal

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Embodiment Construction

[0023] Such as image 3 As shown, the image processing system (such as a computer platform) 2 synchronously outputs the image signal Sv, the original horizontal synchronous signal Ho, and the original vertical synchronous signal Vo to a display 3, and an image processing circuit 5 in the display 3 according to the signal Sv, Instructions from Vo and Ho drive the display 3 to display image screens. As mentioned above, before the original vertical and horizontal synchronous signals Vo, Ho are input to the image processing circuit 5 of the display 3, a certain safe time interval should be ensured between the rising / falling edges of the two synchronous signals Vo, Ho, so as to avoid image instability with the beating situation. The device 4 for adjusting the horizontal synchronous signal and the vertical synchronous signal according to an embodiment of the present invention is disposed in the display 3 and located between the image processing system 2 and the image processing cir...

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Abstract

In the method, each of vertical synchronous signal and level synchronous signal has multipulse separately and a section of time before to after each pulse rise / fall time in the vertical synchronous signal is defined to be a danger range; inlater time, the vertical synchronous signal is delayed to let the danger range be positioned behind pulse rise / fall time of level synchronous signal in order to avoid pickture unstable and jitter caused by frequency floating of display effectively when pulse rise / fall time of the level synchronous signal is located in the danger range.

Description

【Technical field】 [0001] The invention relates to a method and a device for adjusting a horizontal synchronous signal and a vertical synchronous signal, in particular to a method and a device for adjusting a horizontal and vertical synchronous signal for eliminating jumping and instability of a display screen. 【Background technique】 [0002] The display must display, for example, 30 images within one second to form a continuous image in accordance with the persistence of vision of the human eye. Each image includes a plurality of scanning lines, and each scanning line includes a plurality of pixels. Therefore, the image signal received by the display from the image processing system is a series of data corresponding to each pixel. In order for the display to confirm the corresponding pixel position of each data, the image processing system will synchronize with the image signal to send a horizontal synchronization signal representing the start of a scanning line (also known ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/04H04N5/14
Inventor 王瑞明陈建州
Owner AMTRAN TECH