Screen refreshing method according to preset frame rate and device

A screen refresh and frame rate technology, which is applied in the direction of digital output to display devices, cathode ray tube indicators, instruments, etc., can solve the problems of system bandwidth waste and high screen refresh frame rate, and achieve the effect of avoiding waste

Active Publication Date: 2012-04-04
WUXI ZGMICRO ELECTRONICS CO LTD
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Problems solved by technology

In this way, when the reading speed is too fast, the frame rate of the refresh screen will be high, which will lead to

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  • Screen refreshing method according to preset frame rate and device
  • Screen refreshing method according to preset frame rate and device
  • Screen refreshing method according to preset frame rate and device

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[0041] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] One of the core ideas of the embodiments of the present invention is to control the read operation interval between the last read frame buffer and the next read frame buffer so that it is not less than the expected time, wherein the expected time is based on the preset frame The time it takes to refresh a frame of data calculated based on the rate, and the read operation interval is the interval between two read operation starting points; since the read frame buffer can only buffer one frame of image data at a time, even if the read speed is very fast Fast, so the control can also ensure that the refresh time of a frame of image data is not less than the expected time, so that the maximum total number of pixels scanned on th...

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Abstract

The invention provides a screen refreshing method according to a preset frame rate and a device. The method particularly includes that writing operation states of a plurality of frame buffers are preset to be idle states, expected time for refreshing a frame of data of a screen is calculated according to the preset frame rate, writing operation of the frame buffers in the idle states is carried out, one of the frame buffers in the idle states is selected to be used as a reading frame buffer, the writing operation state of the reading frame buffer is refreshed to be a busy state, reading operation of the reading frame buffer is carried out, read frame data are transmitted to an image display to be displayed, a reading operation time interval between a previous reading frame buffer and a next reading frame buffer is not shorter than the expected time, and the state of the reading frame buffer is refreshed to be the idle state after the reading operation is completed. The screen refreshing method and the device are used for reducing bandwidth of a system in a screen refreshing procedure.

Description

technical field [0001] The present invention relates to the technical field of image screen display, in particular to a method and device for refreshing the screen according to a preset frame rate. Background technique [0002] In recent years, LCD (Liquid Crystal Display, Liquid Crystal Display), LED (Light Emitting Diode, Light Emitting Diode) and other image displays have attracted more and more attention. They can display text, graphics and image information in real time or in a loop. It is one of the powerful tools for information dissemination due to its many advantages such as strong viewing. [0003] Screen refresh is a relatively important application of these image displays, which is used to display input image data; one of the screen refresh mechanisms will have a built-in memory in the image display, for example, it can be RAM (Random Access Memory, Random Access Memory) , there is no requirement for the timing of refreshing the screen, that is, the screen can b...

Claims

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Application Information

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IPC IPC(8): G09G5/00G06F3/14
Inventor 冯备战
Owner WUXI ZGMICRO ELECTRONICS CO LTD
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