CN101661697A - Solution to problem of LCD split-screen display of mobile phone - Google Patents
Solution to problem of LCD split-screen display of mobile phone Download PDFInfo
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- CN101661697A CN101661697A CN200910187411A CN200910187411A CN101661697A CN 101661697 A CN101661697 A CN 101661697A CN 200910187411 A CN200910187411 A CN 200910187411A CN 200910187411 A CN200910187411 A CN 200910187411A CN 101661697 A CN101661697 A CN 101661697A
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Abstract
The invention relates to a solution to the problem of LCD split-screen display of mobile phone; the speed that frame data written by a base-band processing chip to a display buffering area and the speed of refreshing an LCD screen by an LCD controller are firstly measured, by comparing the speed or adjusting the refreshing speed of LCD, or adjusting the time sequence relation of the two, the problem of split screen of mobile phone is solved.
Description
Technical field
The present invention relates to the control method that a kind of mobile phone LCM shows, particularly a kind of mobile phone LCM split-screen display way to solve the problem.
Background technology
Along with mobile communication rapid development, mobile phone has become a kind of important tool that people exchange.The function of mobile phone becomes and becomes increasingly complex, and people also are more and more higher to the requirement of mobile phone.The MP4 video playback and the video recording of the LCM. of a large amount of use high resolving power cameras, high resolution WQVGA or even VGA and high pixel, high definition have also all obtained using widely.But the video of the screen of these big resolution, high pixel Camera, high pixel.In the mobile phone development process, the most sharp-pointed problem that runs into is that split screen appears will cause the LCM clear screen time in irrational software control easily.
Summary of the invention
The object of the present invention is to provide LCM split-screen display way to solve the problem on a kind of mobile phone, solved LCM split-screen display problem on the mobile phone reliably.
A kind of mobile phone LCM split-screen display way to solve the problem comprises step:
A. measure baseband processing chip and write the speed that frame data refresh lcd screen to the speed and the lcd controller of display buffer;
B. according to the result who measures,, then allow the Base-Band Processing core when LCM enters non-show state (vertical non-displayperiod), begin the update displayed data if the speed of baseband processing chip write data is faster than the speed that lcd controller refreshes LCD;
If c. 2 of the speed of baseband processing chip write data times are refreshed the speed of LCD greater than lcd controller, then baseband processing chip and lcd controller simultaneously (perhaps after a while) begin to upgrade the data of lcd controller display buffer and refresh LCD;
On the contrary, refresh the speed of LCD less than lcd controller, then adjust the refresh rate of LCD earlier, make it reach 2 times of speed that refresh LCD greater than lcd controller that baseband processing chip is write video data speed if baseband processing chip is write 2 times of speed of video data.
This method is suitable for all and adopts LCM to make the mobile phone of display screen, is which kind of chip no matter it adopts.
When display message, LCM need do two actions, and one is that baseband processing chip is write the display buffer of video data to lcd controller, and another one is the Refresh Data LCD of lcd controller in the buffer zone.Finishing these two actions all needs to expend the regular hour, if both speed differences, result displayed is also different.
As shown in Figure 2, if baseband processing chip is write the speed of video data refreshes LCD greater than lcd controller speed, begin to upgrade the data of display buffer in the lcd controller at TE (the The Tearing Effect Signal) rising edge of signal, begin with the Refresh Data LCD in the display buffer at the negative edge lcd controller of TE.Because the writing speed of baseband processing chip is faster than lcd controller brush LCD speed.So both can not occur intersecting, so can split screen.
As shown in Figure 3, refresh the speed of LCD greater than lcd controller, can avoid occurring the split screen problem by the sequential of controlling both equally if baseband processing chip is write 2 times of video data speed.Lcd controller refreshes LCD in the data that the negative edge of TE receives in the display buffer, meanwhile or after a while, baseband processing chip begins to upgrade the data of lcd controller display buffer.Adopt this mode, every renewal one secondary data of baseband processing chip, lcd controller is just brushed identical data twice.
In Fig. 4, if writing 2 times of speed of video data, baseband processing chip refreshes the speed of LCD less than lcd controller, windowing phenomena can often appear.In the process of lcd controller with the Refresh Data LCD of the inside, display buffer, data in the display buffer are updated, the left side of split screen point shown in the figure like this, the data of the inside, display buffer are the data of N-1 frame, and the right of split screen point, the data of the inside, display buffer have become the data of N frame.LCD is last tangible windowing phenomena can to occur.
Therefore, the key of avoiding occurring split screen is to control baseband processing chip and writes the speed that video data and lcd controller refresh LCD.Make baseband processing chip write 2 times of speed that refresh LCD greater than lcd controller of video data speed.But baseband processing chip is write the restriction that the speed of video data often is subjected to operational version, can not accelerate.But can reduce the speed that lcd controller refreshes LCD.If such as the original refresh rate that adopts is 80 frames, then it can be reduced to 60 frames.
Therefore, the flow process of technical scheme of the present invention the steps include: as shown in Figure 5
1. measuring baseband processing chip writes frame data and refreshes the required separately time of LCD to display buffer and lcd controller.
2., can dispose by Fig. 2 mode if it is faster than the speed that lcd controller refreshes LCD that baseband processing chip is write the speed of video data.Allow baseband processing chip when LCM enters non-show state (vertical non-displayperiod), begin the update displayed data.
3., dispose according to Fig. 3 mode if baseband processing chip is write 2 times of speed of video data and refreshed the speed of LCD greater than lcd controller.Lcd controller refreshes LCD at the negative edge of TE with the data that the inside, display buffer receives, meanwhile or after a while, baseband processing chip begins to upgrade the data of lcd controller display buffer.
On the contrary, refresh the speed of LCD less than lcd controller, then adjust the refresh rate of LCD, make it reach 2 times of speed that refresh LCD greater than lcd controller that baseband processing chip is write video data speed if baseband processing chip is write 2 times of speed of video data.Be configured according to Fig. 3 mode then.
Advantage of the present invention is to have solved LCM split-screen display problem on the mobile phone reliably.The method that proposes not according to the present invention is controlled and is refreshed LCM, and will occur split-screen display continually, show dislocation, even LCM flower screen.
Description of drawings:
Fig. 1. solve the hardware block diagram of LCM split screen;
Fig. 2. the speed that baseband processing chip is write video data refreshes the speed of LCD greater than lcd controller;
The speed that Fig. 3 .2 times baseband processing chip is write video data refreshes the speed of LCD greater than controller;
The speed that Fig. 4 .2 times baseband processing chip is write video data refreshes the speed of LCD less than controller;
Fig. 5. software preparation process figure.
Claims (2)
1, a kind of mobile phone LCM split-screen display way to solve the problem comprises step:
A. measure baseband processing chip and write the speed that frame data refresh lcd screen to the speed and the lcd controller of display buffer, according to the result who measures;
If b. the speed of baseband processing chip write data is faster than the speed that lcd controller refreshes LCD, then allow baseband processing chip when LCM enters non-show state (vertical non-displayperiod), begin the update displayed data;
If c. 2 of the speed of baseband processing chip write data times are refreshed the speed of LCD greater than lcd controller, then baseband processing chip and lcd controller simultaneously (perhaps after a while) than it begin to upgrade the data of lcd controller display buffer and refresh LCD;
Refresh the speed of LCD if baseband processing chip is write 2 times of speed of video data less than lcd controller, then adjust the refresh rate of LCD earlier, make it reach 2 times of speed that refresh LCD greater than lcd controller that baseband processing chip is write video data speed.
2, a kind of mobile phone LCM split-screen display way to solve the problem according to claim 1 is characterized in that, this method is suitable for all and adopts LCM to make the mobile phone of display screen, is which kind of chip no matter it adopts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910187411A CN101661697A (en) | 2009-09-17 | 2009-09-17 | Solution to problem of LCD split-screen display of mobile phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910187411A CN101661697A (en) | 2009-09-17 | 2009-09-17 | Solution to problem of LCD split-screen display of mobile phone |
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| Publication Number | Publication Date |
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| CN101661697A true CN101661697A (en) | 2010-03-03 |
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| CN200910187411A Pending CN101661697A (en) | 2009-09-17 | 2009-09-17 | Solution to problem of LCD split-screen display of mobile phone |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102855205A (en) * | 2011-06-28 | 2013-01-02 | 晨星软件研发(深圳)有限公司 | Data access method and electronic device capable of accessing data |
| CN103137104A (en) * | 2011-11-23 | 2013-06-05 | 宏达国际电子股份有限公司 | Image display breakup removal method, relative image display and electronic device |
| CN103165093A (en) * | 2013-02-26 | 2013-06-19 | 深圳市金立通信设备有限公司 | Method for adjusting screen refresh rate and display device |
| CN103377638A (en) * | 2012-04-28 | 2013-10-30 | 华为技术有限公司 | Method and device for rapid signal response |
-
2009
- 2009-09-17 CN CN200910187411A patent/CN101661697A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102855205A (en) * | 2011-06-28 | 2013-01-02 | 晨星软件研发(深圳)有限公司 | Data access method and electronic device capable of accessing data |
| CN102855205B (en) * | 2011-06-28 | 2015-09-30 | 晨星软件研发(深圳)有限公司 | Data access method and can the electronic installation of access data |
| CN103137104A (en) * | 2011-11-23 | 2013-06-05 | 宏达国际电子股份有限公司 | Image display breakup removal method, relative image display and electronic device |
| CN103377638A (en) * | 2012-04-28 | 2013-10-30 | 华为技术有限公司 | Method and device for rapid signal response |
| US9160895B2 (en) | 2012-04-28 | 2015-10-13 | Huawei Technologies Co., Ltd. | Method and apparatus for quickly responding to signal |
| CN103377638B (en) * | 2012-04-28 | 2015-12-16 | 华为技术有限公司 | A kind of method of quick response signal and device |
| CN103165093A (en) * | 2013-02-26 | 2013-06-19 | 深圳市金立通信设备有限公司 | Method for adjusting screen refresh rate and display device |
| CN103165093B (en) * | 2013-02-26 | 2016-03-02 | 深圳市金立通信设备有限公司 | A kind of method and display device adjusting screen refresh rate |
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Application publication date: 20100303 |