Method and device for controlling display refresh

A control display and self-refresh technology, applied in the direction of standard conversion, video signal spatial resolution conversion, etc., can solve the problems of flickering screen, frame image vertical blanking change, etc., and achieve the effect of seamless switching

Active Publication Date: 2019-02-26
CHIPONE TECH BEIJINGCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the implementation method of panel self-refresh exit will make some row data of the previous frame image cannot be refreshed for a long time when the panel self-refresh exits, resulting in a flickering screen, and the closer to the bottom of the screen, the more obvious the flickering screen, or make the frame The sudden change of the vertical blanking of the image is too large or too small, resulting in a splash screen effect

Method used

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  • Method and device for controlling display refresh
  • Method and device for controlling display refresh
  • Method and device for controlling display refresh

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0051] This embodiment provides a method for controlling display refresh.

[0052] figure 1 is a flow chart of a method for controlling display refresh according to Embodiment 1 of the present invention, as shown in figure 1 As shown, the method is specifically implemented by the following steps:

[0053] Step S101, detecting changes in image data. Step S102 is executed after step S101 is executed.

[0054] Step S102, judging whether the image data has changed. If there is a change, execute step S104, and if there is no change, execute step S103.

[0055] Step S103, entering or maintaining panel self-refresh. Step S101 is executed after step S103 is executed.

[0056] There is no change in the image, which naturally meets the application conditions of panel self-refresh, and there is no need to exit panel self-refresh. In this case, it is necessary to continue to detect whether the image data changes.

[0057] The video sending end sends the panel self-refresh entry co...

Embodiment 2

[0094] Figure 7 It is a flowchart of a method for controlling display refresh provided according to Embodiment 2 of the present invention. As shown in the figure, the method is specifically implemented by the following steps:

[0095] Step S701, detecting changes in image data. Step S702 is executed after step S701 is executed.

[0096] Step S702, judging whether the image data has changed. If there is a change, execute step S704, and if there is no change, execute step S703.

[0097] Step S703, enter or maintain panel self-refresh. Step S701 is executed after step S703 is executed.

[0098] Step S704, judging whether the panel is in self-refresh. If the panel is in self-refresh, execute step S705, otherwise execute step S701.

[0099] Different from Embodiment 1, it does not judge whether the change amount of continuous multi-frame image data is smaller than the data change amount of continuous multi-frame image in the exit condition. When the image data changes, it di...

Embodiment 3

[0108] Figure 8 It is a flowchart of a method for controlling display refresh provided according to Embodiment 3 of the present invention. As shown in the figure, the method is specifically implemented by the following steps:

[0109] Step S801, detecting changes in image data. Step S802 is executed after step S801 is executed.

[0110] Step S802, judging whether the image data has changed. If there is a change, execute step S804, and if there is no change, execute step S803.

[0111] Step S803, enter or maintain panel self-refresh. Step S801 is executed after step S803 is executed.

[0112] Step S804, judging whether the panel is in self-refresh. If the panel is self-refreshing, execute step S805, otherwise execute step S801.

[0113] Step S805, detecting timing. Step S806 is executed after step S805 is executed.

[0114] Step S806, judging whether it is in the horizontal blanking interval, if yes, execute step S807, otherwise execute step S805.

[0115] Different f...

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PUM

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Abstract

The invention provides a method and a device for controlling display refresh. The method comprises the following steps: detecting change of a plurality of continuous frames of image data; when the change of the plurality of continuous frames of image data satisfies a first condition, entering or maintaining panel self-refresh; and when the change of the plurality of continuous frames of image data satisfies a second condition, exiting from the panel self-refresh or updating image data, saving the updated image data in local cache and maintaining the panel self-refresh at a horizontal blanking interval or a vertical blanking interval. The device is used for implementing the method. Through adoption of the method and the device, the problem of abnormal display since certain line data of a previous frame of image cannot be refreshed automatically for a long time and vertical blanking of the frame of image suddenly changes too much or too little when the panel self-refresh is exited is solved, and smooth switching from a local time sequence at a video receiving end to a time sequence at a video transmitting end is realized.

Description

technical field [0001] The invention relates to the field of display and image processing, in particular to a method and device for controlling display refresh. Background technique [0002] DisplayPort is an industry standard for personal computers and consumer electronics that defines a scalable digital video interface with optional audio and content protection. Embedded DisplayPort is one of the common interfaces of DisplayPort in the embedded field, and provides an optional Panel Self Refresh function for the entire system. A typical system includes a video sending end and a video receiving end: usually the video receiving end receives the image data sent by the video sending end, and outputs the image data to the display screen according to the refresh rate of the video sending end, such as 60Hz; when continuous When multiple frames of images remain unchanged, the video sender can command the video receiver to enter the panel self-refresh mode, and the video receiver r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/01
CPCH04N7/0117
Inventor 娄新磊刘海峰蔡剑雍尚刚武甲东刘子瑶李士达
Owner CHIPONE TECH BEIJINGCO LTD
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