CN1499824A - Method for raising quality of image on liquid crystal display device - Google Patents
Method for raising quality of image on liquid crystal display device Download PDFInfo
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- CN1499824A CN1499824A CNA021461945A CN02146194A CN1499824A CN 1499824 A CN1499824 A CN 1499824A CN A021461945 A CNA021461945 A CN A021461945A CN 02146194 A CN02146194 A CN 02146194A CN 1499824 A CN1499824 A CN 1499824A
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- liquid crystal
- crystal display
- image quality
- refreshing frequency
- image
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Abstract
In the method, a frame of image is divided into two fields: scanning odd lines for first field, and scanning even lines for second field. Two fields of image are constituted a frame of integrated image so as to solve trailing and twinkling phenomena caused by low response speed of liquid crystal material when images are displayed dynamically. Meanwhile, reducing signal frequency decreases electromagnetic interference in signal transmission. Increasing pulse width of row strobing increases time for writing signal. Changing number of scanning frames within unit time increases number of updating images within unit time.
Description
Technical field
The present invention relates to the raising image quality method in a kind of electronic equipment Display Technique field, particularly relate to a kind of method that improves the liquid crystal display image quality.
Background technology
See also shown in Figure 1, the driving method of existing liquid crystal display is, when the row strobe pulse arrives, first all TFT of row (Thin Film Transistor) open, first all picture elements of row are charged, then in turn gating second row ..., to last column, form a frame image and show.The frame refreshing frequency is 60HZ.In order to solve the problem of LCD write time deficiency when high-resolution shows, adopt superimposed pulse turntable driving or dipulse turntable driving scheme usually, increase the write time by precharge mode.Because the response speed of main flow LCD when showing dynamic menu, image quality bad phenomenon such as streaking, ghost image can occur between 25ms～50ms in the market.Thereby influence the problem of image quality slowly in order to solve the liquid crystal display response speed, people have carried out a lot of researchs, comprise the response speed that improves liquid crystal material, increase ways such as optical compensation films, but these ways all can increase the LCD cost, and the effect that reaches neither be obvious especially.
Because above-mentioned existing method for raising liquid crystal display image quality all can't provide desirable effect, the design people is based on abundant practical experience and professional knowledge, actively studied innovation, through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
Technical problem underlying to be solved by this invention is, overcoming existing is the defective that improves the whole bag of tricks existence of liquid crystal display image quality, and provide a kind of method of effective raising liquid crystal display image quality, when adopting present main flow liquid crystal display, this method can satisfy the requirement that dynamic menu is shown.
The present invention solves its technical problem underlying and realizes by the following technical solutions.Adopt a kind of interleaved way, a frame image is divided into odd field and even field, two of odd field and even fields are formed the complete picture of a frame.In order to solve the problem of liquid crystal display write time deficiency when high-resolution shows, the width of interleaved capable strobe pulse is two times of the capable gate width of lining by line scan, has effectively solved the problem of write time deficiency.Increased the gating time of capable strobe pulse.
The present invention solves its technical problem and can also adopt following technical measures further to realize.When adopting interlace mode in order to solve, the frame number that refreshes in the unit interval is very few, thereby causes the low problem of picture update rate, according to the response speed of different liquid crystal materials, adopts different refreshing frequencys.By improving refreshing frequency, carry out under the prerequisite of dynamic menu needs satisfied, suitably improve shown image quantity in the unit interval, thereby remedy the low shortcoming of refreshing frequency.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, the present invention has adopted interleaved driving method, because in liquid crystal display, each picture element is by an independent TFT switch control, during keeping, pixel TFT switch is off state, and electric charge keeps storage by liquid crystal capacitance and storage capacitance, thereby can not have the scintillation that occurred of CRT TV when adopting interleaved driving method; Adopt interleaved driving method, also reduced the clock frequency of grid line and data line signal, reduced the electromagnetic interference between signal.Table 1 is the clock frequency contrast with 15 inches XGA LCD:
Two kinds of scheme data frequency contrasts of table 1
Frame rate line-scanning frequency clock frequency
60Hz 48.36Hz 65MHz lines by line scan
Interlacing scan 60Hz 24.18Hz 32.5MHz
To adopting the LCD of polysilicon (P-Si) technology, because its peripheral driving circuit (grid, source drive) is integrated on the glass substrate, design together with inner display unit,, can obtain good display effect equally if adopt drive scheme of the present invention.
The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is the existing liquid crystal display drive circuit figure that lines by line scan.
Fig. 2 is interlacing scan liquid crystal display drive circuit figure of the present invention.
Fig. 3 lines by line scan and interleaved capable strobe pulse comparison diagram.
Among the figure: a. odd-numbered line (2n-1) the b. capable strobe seperation of the capable gate width Tf. of even number line (2n) c. interlacing scan odd-numbered line (2n-1) d. interlacing scan even number line (2n) Th. of lining by line scan of lining by line scan
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, the method for the raising liquid crystal display image quality that foundation the present invention is proposed describe in detail as after.
See also shown in Figure 2ly, the present invention improves the method for liquid crystal display image quality, and it mainly comprises: a frame image is divided into two, first (1/6 0s) scanning odd-numbered line 1,3,5 ..., be called odd field; Second (1/60s) scanning even number line 2,4,6 ..., being called even field, two of odd field and even fields are formed the complete picture of a frame (1/30s).
See also shown in the contrast of Fig. 3, the present invention improves the method for liquid crystal display image quality, the width of row strobe pulse is two times of the capable gate width of lining by line scan in interleaved drive scheme, solved the problem of write time deficiency effectively, by increasing the gating time of each row, can reach better display effect.
By improving refreshing frequency, carry out under the prerequisite of dynamic menu needs satisfied, suitably improve shown image quantity in the unit interval, thereby remedy the low shortcoming of refreshing frequency.For example, for liquid crystal response speed is the display of 20ms (15+5), refreshing frequency is set at 100Hz, like this in the unit interval (1s), can show 50 complete images, and be the display of 25ms (20+5) for liquid crystal response speed, refreshing frequency is set at 85Hz, can show 42.5 complete images like this in the unit interval.For liquid crystal response speed is the display of 40ms (23+17), then can adopt the refreshing frequency of 80Hz, shows 40 complete images in the unit interval.Other liquid crystal also adopts corresponding refreshing frequency, to reach better display effect.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (5)
1, a kind of method that improves the liquid crystal display image quality is characterized in that: a frame image is divided into odd field and even field, forms the complete image of a frame for two; Adopt wide gate; Refreshing frequency is according to the difference of used liquid crystal material and different.
2, the method for raising liquid crystal display image quality according to claim 1, it is characterized in that wherein said employing wide gate, it is the interleaved capable strobe pulse that adopts a kind of broad, the width of this journey strobe pulse is: under the equal resolution condition, and two times of the capable gate width of progressive scan mode liquid crystal display.
3, the method for raising liquid crystal display image quality according to claim 1, it is characterized in that wherein said refreshing frequency is according to the difference of used liquid crystal material and different, for the display device that the fast liquid crystal material of response speed is made, the refreshing frequency that system uses is higher; For the display device that the slow liquid crystal material of response speed is made, the refreshing frequency that system uses is relatively low, the refreshing frequency but the 60HZ that will be higher than standard lines by line scan.
4, the method for raising liquid crystal display image quality according to claim 1 is characterized in that wherein said liquid crystal display, can be the a-Si liquid crystal display, also can be the P-Si liquid crystal display.
5, the method for raising liquid crystal display image quality according to claim 1 is characterized in that wherein said liquid crystal display, can be LCD, also can be liquid crystal TV set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021461945A CN1499824A (en) | 2002-11-04 | 2002-11-04 | Method for raising quality of image on liquid crystal display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021461945A CN1499824A (en) | 2002-11-04 | 2002-11-04 | Method for raising quality of image on liquid crystal display device |
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| CN1499824A true CN1499824A (en) | 2004-05-26 |
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| CNA021461945A Pending CN1499824A (en) | 2002-11-04 | 2002-11-04 | Method for raising quality of image on liquid crystal display device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101266745B (en) * | 2008-05-05 | 2010-04-14 | 友达光电股份有限公司 | A display device and its driving method |
| CN101221717B (en) * | 2008-01-24 | 2010-06-02 | 友达光电股份有限公司 | Flat-panel display device and driving method thereof |
| CN101149896B (en) * | 2006-09-19 | 2011-03-02 | 株式会社日立显示器 | Display device |
| CN105070220A (en) * | 2015-09-11 | 2015-11-18 | 京东方科技集团股份有限公司 | Display method of display panel, display device and display unit |
| CN109903713A (en) * | 2019-03-06 | 2019-06-18 | 深圳市华星光电技术有限公司 | Show compensation circuit and display compensation method |
| CN111462710A (en) * | 2014-08-05 | 2020-07-28 | 苹果公司 | Refreshing multiple regions of a display device simultaneously using multiple different refresh rates |
-
2002
- 2002-11-04 CN CNA021461945A patent/CN1499824A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101149896B (en) * | 2006-09-19 | 2011-03-02 | 株式会社日立显示器 | Display device |
| CN101221717B (en) * | 2008-01-24 | 2010-06-02 | 友达光电股份有限公司 | Flat-panel display device and driving method thereof |
| CN101266745B (en) * | 2008-05-05 | 2010-04-14 | 友达光电股份有限公司 | A display device and its driving method |
| CN111462710A (en) * | 2014-08-05 | 2020-07-28 | 苹果公司 | Refreshing multiple regions of a display device simultaneously using multiple different refresh rates |
| CN111462710B (en) * | 2014-08-05 | 2022-02-18 | 苹果公司 | Refreshing multiple regions of a display device simultaneously using multiple different refresh rates |
| CN105070220A (en) * | 2015-09-11 | 2015-11-18 | 京东方科技集团股份有限公司 | Display method of display panel, display device and display unit |
| CN109903713A (en) * | 2019-03-06 | 2019-06-18 | 深圳市华星光电技术有限公司 | Show compensation circuit and display compensation method |
| WO2020177212A1 (en) * | 2019-03-06 | 2020-09-10 | 深圳市华星光电技术有限公司 | Display compensation circuit and method, and display apparatus |
| CN109903713B (en) * | 2019-03-06 | 2020-11-24 | 深圳市华星光电技术有限公司 | Display compensation circuit and display compensation method |
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