CN101604510B - Driving method for driving color liquid crystal display device by field order - Google Patents
Driving method for driving color liquid crystal display device by field order Download PDFInfo
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- CN101604510B CN101604510B CN200810067790XA CN200810067790A CN101604510B CN 101604510 B CN101604510 B CN 101604510B CN 200810067790X A CN200810067790X A CN 200810067790XA CN 200810067790 A CN200810067790 A CN 200810067790A CN 101604510 B CN101604510 B CN 101604510B
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Abstract
The invention relates to a driving method for driving a color liquid crystal display device by a field order. The color liquid crystal display device driven by the field order is provided with a backlight source formed by two or more than two different color groups, the backlight source respectively displays one time within the time of the color liquid crystal display device displaying one frame image, and the displaying time of a liquid crystal display element within a same color zone is more than or equal to two times. The color liquid crystal display device driven by the field order is greatly enhanced in colorful degree.
Description
Technical field
The present invention relates to a kind of driving method of field sequence driven colour liquid crystal display device.
Background technology
Existing the color liquid crystal display arrangement that preface drives; Its structure is shown in accompanying drawing 6; It comprises a preface driving liquid crystal element 1 and backlight 3; Be provided with diffuser plate 2 between preface driving liquid crystal element 1 on the scene and the backlight 3, said backlight 3 includes the LED lamp 4 that three groups of R (red), G (green), B (indigo plant) evenly arrange.Backlight is divided into three pictures (field) to R (red), G (green), B (indigo plant) in order by the time, cooperates a preface driving liquid crystal element 1 to open or close, and demonstrates coloured image.Accompanying drawing 7 is to be divided into three pictures (field) with R (red), G (green), B (indigo plant); Opening or closing of fluid,matching crystal display element; In a colour picture (frame) lining; R (red), G (green), B (indigo plant) respectively show once, and the synoptic diagram of generation redness, green, blueness, yellow, cyan, purple, white and 8 kinds of colors of black.The demonstration time of color liquid crystal display arrangement one two field picture of existing preface driving is about 16.7 milliseconds; R (red), G (green), three look demonstration times of B (indigo plant) equate that the demonstration time of every kind of color is 5.6 milliseconds.Under this condition, the color liquid crystal display arrangement that this preface drives just can only exhibit red, green, blueness, yellow, cyan, purple, white and 8 kinds of colors of black, and the tone of the color liquid crystal display arrangement of this preface driving is more single.If as backlight, in the time that every two field picture showed, the time that yellow takies is 2/3 with yellow and blue two kinds of colors, the time that blueness takies is 1/3, and the color of the color liquid crystal display arrangement of this preface driving is more dull.
Summary of the invention
The objective of the invention is to overcome the problems referred to above, the driving method of the field sequence driven colour liquid crystal display device of the color liquid crystal display arrangement color that can enrich the preface driving is provided to society.
Technical scheme of the present invention is: the driving method that a kind of field sequence driven colour liquid crystal display device is provided; In the color liquid crystal display arrangement that preface on the scene drives by the backlight of forming by different color more than two groups or two groups; In color liquid crystal display arrangement shows the time of a two field picture; Each shows said backlight once, and the number of times of liquid crystal display cells switch in the district same of the same colour of backlight is more than or equal to twice.
As required, can or close with the unlatching of liquid crystal display cells or close and adopt asynchronous unlatching or close the unlatching of backlight.
Further, in the district same of the same colour of backlight,, adjust the color range of respective color through changing the open-interval length of liquid crystal display cells.
Said backlight is made up of the LED lamp of corresponding color.
Said color liquid crystal display device is a high speed TN liquid crystal display, OCB liquid crystal display, PDLC liquid crystal display, FLC liquid crystal display or AFLC liquid crystal display.
Said backlight is that the LED lamp of two groups of different colors is formed, and the color of two groups of LED lamps is a complementary colors.
Said backlight is that the LED lamp of three group of different color is formed, and wherein one group be red, one group be green and one group be blueness.
Advantage of the present invention is the switch number of times (being switching frequency) through the liquid crystal display cells in each the look district in every two field picture demonstration time; Make the color of field sequence driven colour liquid crystal display device present different Neutral colour; And reach the color that enriches field sequence driven colour liquid crystal display device; Come the color of field sequence driven colour liquid crystal display device to present different Neutral colour than traditional change control voltage like this, to simplify at control circuit many, and control easily.
Description of drawings
Fig. 1 is that a kind of backlight of the present invention is that two groups of colors drive synoptic diagram.
Fig. 2 is the color synoptic diagram that the present invention drives secondary.
Fig. 3 is that the present invention drives three times color synoptic diagram.
Fig. 4 is the synoptic diagram that Fig. 2 embodiment carries out asynchronous driving.
Fig. 5 is the circuit theory frame structure synoptic diagram of driving method of the present invention.
Fig. 6 is the synoptic diagram that existing preface drives colour display device.
Fig. 7 is that existing circulation drives color synoptic diagram once.
Embodiment
The core of the driving method of this field sequence driven colour liquid crystal display device is: under the situation of the driving frequency that does not change the field sequence driven colour liquid crystal display device backlight; In each monochromatic look district that shows; Change the driving frequency of liquid crystal display cells; Promptly change the switch number of times of liquid crystal display cells, make its switch more than twice or twice in a monochromatic look district that shows.
See also Fig. 1, Fig. 1 is that a kind of backlight of the present invention is that two groups of colors drive synoptic diagram.As shown in the figure; When backlight is two groups of colors, when among the figure being one group red (R) and one group green (G) (all can adopt the LED lamp of respective color), through changing the number of times that opens or closes of liquid crystal display cells; Can reach the purpose of rich colors; Like first row among Fig. 1, red colored lamp and green are respectively opened once, then present dark yellow; In second row, red colored lamp and green respectively open twice, then present yellow; Red colored lamp opens twice in the third line, and green is opened once, then appears orange or the like.
See also Fig. 2, Fig. 2 is the color synoptic diagram that the present invention drives secondary.As shown in the figure, red (R) LED lamp of the backlight of field sequence driven colour liquid crystal display device, green (G) LED lamp and blueness (B) LED lamp are pressed the normal frequency driving, successively with RGB, the RGB demonstration that circulates; But in the time that shows in every kind of monochrome (red, green or blue), only be that (certainly, also can not be half the switching time of liquid crystal display cells for every kind of monochromatic demonstration time half the switching time of liquid crystal display cells; It can less than or greater than half the; So long as switch gets final product for twice, can reach the purpose of the color of adjustment field sequence driven colour liquid crystal display device equally), that is to say; Can open twice or close twice, perhaps open and close each once.Like this, like first row among Fig. 2, when backlight was redness, liquid crystal display cells was only opened once, and the time is 1/2nd of backlight redness, is the pass At All Other Times, and at this moment, field sequence driven colour liquid crystal display device institute Show Color is a kermesinus; Like second row among Fig. 2, when backlight was redness, liquid crystal display cells opened twice continuously, is the pass At All Other Times, and at this moment, field sequence driven colour liquid crystal display device institute Show Color is red; The third line is a dirty-green successively, and fourth line is green or the like.So combination can obtain 64 kinds of different colours.Like this, just enriched the field sequence driven colour liquid crystal display device display color.
Said backlight can be the LED lamp of two groups of different colors to be formed, and the color of two groups of LED lamps is a complementary colors.
See also Fig. 3, Fig. 3 is that the present invention drives three times color synoptic diagram.Content shown in Figure 3 is compared with content shown in Figure 2; Its ultimate principle is identical; It is shown in Figure 3 that different is is that red (R) LED lamp of backlight, green (G) LED lamp and blueness (B) the LED lamp of field sequence driven colour liquid crystal display device also is to drive by normal frequency; Successively with RGB, the RGB demonstration that circulates; But in the time that shows in every kind of monochrome (red, green or blue), be 1/3rd (also can less than or greater than 1/3rd) of every kind of monochromatic demonstration time the switching time of liquid crystal display cells, promptly can switch three times.Like this, like first row among Fig. 3, when backlight was redness, liquid crystal display cells was only opened once, and the time is 1/3rd of backlight redness, is the pass At All Other Times, and at this moment, field sequence driven colour liquid crystal display device institute Show Color is a blush; Like second row among Fig. 3, when backlight was redness, liquid crystal display cells opened twice continuously, is the pass At All Other Times, and at this moment, field sequence driven colour liquid crystal display device institute Show Color is a kermesinus; Like the third line among Fig. 3, when backlight was redness, liquid crystal display cells was opened three times continuously, is the pass At All Other Times, and at this moment, field sequence driven colour liquid crystal display device institute Show Color is red; So similar, field sequence driven colour liquid crystal display device institute Show Color is little green, dirty-green and green or the like.So combination can obtain 512 kinds of different colours.Like this, just enriched the field sequence driven colour liquid crystal display device display color more.
If the time of liquid crystal display cells switch only accounts for the monochromatic demonstration time 1/4th, 1/5th of backlight ... etc., they can be combined into colors not of the same race such as 2048,16384 respectively.
See also Fig. 4, Fig. 4 is the synoptic diagram that Fig. 2 embodiment carries out asynchronous driving.In actual production,, need or close with the unlatching of liquid crystal display cells or close the asynchronous unlatching of employing or close the unlatching of backlight sometimes because the parameter of backlight and liquid crystal display device is different.As shown in the figure, the time ratio liquid crystal display cells that backlight is opened or closed is opened or is closed and shifted to an earlier date time t.T retardation time is opened or closed to the time ratio liquid crystal display cells of obviously, as required also can backlight opening or closing.Asynchronous unlatching through backlight and liquid crystal display cells or close also can reach the color of adjustment field sequence driven colour liquid crystal display device.
See also Fig. 5, Fig. 5 is the circuit theory frame structure synoptic diagram of driving method of the present invention.Circuit of the present invention comprises control module 100, liquid crystal display cells driver 110, the color liquid crystal display device 130 that a preface drives, backlight driver 120 and backlight 140.At first; Image 150 is broken down into 6 group of pictures (certainly, according to circumstances can resolve into 3 groups of above any amount of pictures) in image dissector 170, in color liquid crystal display device shows time of a two field picture (16.7 milliseconds); Said backlight display frequency is constant; The switch number of times of said liquid crystal display cells can be more than twice or twice, and its number of times can be by control module 100 controls, and said liquid crystal display cells driver 110 can adopt high speed TN liquid crystal display; Said liquid crystal display cells driver 110 also can be used the OCB liquid crystal display of high response, the AFLC liquid crystal display of FLC liquid crystal display, PDLC liquid crystal display or high response.
Claims (7)
1. the driving method of a field sequence driven colour liquid crystal display device; It is characterized in that: in the color liquid crystal display arrangement that preface on the scene drives by the backlight of forming by different color more than two groups or two groups; In color liquid crystal display arrangement shows the time of a two field picture; Each shows said backlight once, and the number of times of liquid crystal display cells switch in the district same of the same colour of backlight is more than or equal to twice.
2. the driving method of field sequence driven colour liquid crystal display device according to claim 1 is characterized in that: as required, can or close with the unlatching of liquid crystal display cells or close and adopt asynchronous unlatching or close the unlatching of backlight.
3. the driving method of field sequence driven colour liquid crystal display device according to claim 1 and 2 is characterized in that: in the district same of the same colour of backlight, through changing the open-interval length of liquid crystal display cells, adjust the color range of respective color.
4. the driving method of field sequence driven colour liquid crystal display device according to claim 3, it is characterized in that: said backlight is made up of the LED lamp of corresponding color.
5. the driving method of field sequence driven colour liquid crystal display device according to claim 4, it is characterized in that: said liquid crystal display cells is high speed TN liquid crystal display, OCB liquid crystal display, PDLC liquid crystal display, FLC liquid crystal display or AFLC liquid crystal display.
6. the driving method of field sequence driven colour liquid crystal display device according to claim 5 is characterized in that: said backlight is that the LED lamp of two groups of different colors is formed, and the color of two groups of LED lamps is a complementary colors.
7. the driving method of field sequence driven colour liquid crystal display device according to claim 5 is characterized in that: said backlight is that the LED lamp of three group of different color is formed, and wherein one group be red, one group be green and one group be blueness.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810067790XA CN101604510B (en) | 2008-06-14 | 2008-06-14 | Driving method for driving color liquid crystal display device by field order |
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| CN200810067790XA CN101604510B (en) | 2008-06-14 | 2008-06-14 | Driving method for driving color liquid crystal display device by field order |
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| CN101604510B true CN101604510B (en) | 2012-07-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106324878B (en) * | 2016-10-31 | 2017-11-21 | 京东方科技集团股份有限公司 | The method of display device and control display device |
| CN110967872A (en) * | 2019-12-19 | 2020-04-07 | 京东方科技集团股份有限公司 | Liquid crystal display substrate and driving method thereof, liquid crystal display panel and driving method thereof |
| CN113192467B (en) * | 2021-04-29 | 2022-10-21 | 贵州芯源微科技有限公司 | Scanning method of backlight panel, LED backlight panel, driving unit and display panel |
| TWI781796B (en) * | 2021-10-19 | 2022-10-21 | 大陸商常州欣盛半導體技術股份有限公司 | Timing control method using pulse width modulation, timing controller and display device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005012985A1 (en) * | 2003-08-04 | 2005-02-10 | Fujitsu Limited | Liquid crystal display device |
| US20060028424A1 (en) * | 2004-08-03 | 2006-02-09 | Biing-Seng Wu | Color-sequential display method |
| CN101169927A (en) * | 2007-12-06 | 2008-04-30 | 友达光电股份有限公司 | Color order liquid crystal display backlight drive method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005012985A1 (en) * | 2003-08-04 | 2005-02-10 | Fujitsu Limited | Liquid crystal display device |
| US20060028424A1 (en) * | 2004-08-03 | 2006-02-09 | Biing-Seng Wu | Color-sequential display method |
| CN101169927A (en) * | 2007-12-06 | 2008-04-30 | 友达光电股份有限公司 | Color order liquid crystal display backlight drive method |
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| CN101604510A (en) | 2009-12-16 |
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