CN102855847B - Waveform debugging method applied to EPD (electrophoretic display) screen - Google Patents
Waveform debugging method applied to EPD (electrophoretic display) screen Download PDFInfo
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- CN102855847B CN102855847B CN201210310449.9A CN201210310449A CN102855847B CN 102855847 B CN102855847 B CN 102855847B CN 201210310449 A CN201210310449 A CN 201210310449A CN 102855847 B CN102855847 B CN 102855847B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000014759 maintenance of location Effects 0.000 claims abstract description 19
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 27
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 27
- 239000004571 lime Substances 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 4
- 230000004044 response Effects 0.000 abstract description 9
- 239000002245 particle Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000003086 colorant Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 239000003094 microcapsule Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
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Abstract
The invention discloses a waveform debugging method applied to an EPD (electrophoretic display) screen. The waveform debugging method comprises the following steps: firstly, driving the EPD screen to a most stable black gray scale, then driving the EPD screen to the most stable white grey scale, and finally driving the EPD screen to the gray scale, wherein the waveform form of the EPD screen is black at the most stable black gray scale and white at the most stable white gray scale and the required black driven to the gray scale. By adopting the waveform debugging method disclosed by the invention, the waveform debugging method is short in drive time, high in response speed, stable in retention time, high in contrast, long in service life of the EPD screen, low in power consumption, and smooth in character refreshing, and the debugging period of a tester is shortened.
Description
Technical field
The present invention relates to field of electronic display, particularly a kind of waveform adjustment method that is applied to EPD screen.
Background technology
EPD screen claims again electronic ink screen, is a kind of display screen that utilizes electrophoretic display technology and make.Electrophoretic display technology system is packaged in charged particle black, white dichromatism in microcapsule structure, by the lifting moving of the different electric charge black and white of extra electric field control particle, to present the display effect of black and white monochrome.Under the effect of electric field, two kinds of different particles of black and white are not stopped transport moving, and in the time that white particle rises to upper surface, all ambient lightings are mapped to upper surface and are reflected completely, have just formed white state, namely the state of paper; When after exchange electrode, the particle meeting switch of two kinds of colors, the particle moving of white is to below, and above the particle of black rises to, light is all absorbed by the particle of black, and result just causes black, has also just formed white and black displays.In addition, also can have the state of mixing at upper surface, two kinds of proportional mixing of different particles, can form like this black and white and have the different colours of gray-level.Because EPD technology can present high reflectance, the high white and black displays effect contrasting, there is memory effect simultaneously, after extra electric field is cancelled, the demonstration that instant playback is current presented, the content as shown in same printed paper.Owing to thering is bistability, after power electrical field is cancelled, still image is retained to some months or several years on EPD screen.
EPD screen is by the gate circuit control chip (Gate IC) on timing controller control TFT substrate and source electrode chip (Source IC), each pixel to be applied continuously voltge surge (pulse of 20ms generating positive and negative voltage) and reaches demonstration image.As shown in Figure 1, ordinate represents driving voltage, and the driving time of each lattice representative of horizontal ordinate is 20ms.In Fig. 1, there are 14 lattice, therefore driving time 280ms.This EPD screen shown in figure is black from being driven in vain, and the voltage of use-15V drives 280ms to reach, and Current Temperatures is 26 DEG C.According to the difference of EPD screen, driving voltage and temperature, can increase or reduce driving time.
The test of response time be when calculating B&W and reach peak value the needed time.As shown in Figure 2, waveform arrange middle by black in vain, in vain to black synchronously from 200ms start drive, increase successively 20ms, and with correction apparatus (for example eye-one) survey a contrast, be increased to 760ms always, contrast-data is recorded, and make tracing analysis figure.Thereby the driving time while reaching capacity according to curve is determined the black and white response time.
The test of retention time is to utilize the response time to test the black and white response time obtaining, drive screen by Black-White-Black-White, measure white lightness L* by correction apparatus, and record, place and again record the lightness L* that screen is white after 2 minutes, and before and after record, the value of twice white lightness L* is moved back △ L*, moves back △ L* determine the white retention time according to value.In like manner drive screen by Black-White-Black-White-Hei, and measure black lightness L* with correction apparatus, and record, place and again record the lightness L* that screen is black after 2 minutes, and before and after record record, the value of twice black lightness L* is moved back △ L*, moves back △ L* determine the black retention time according to value.
The waveform debugging of traditional EPD screen is divided into three sections: first in first paragraph, be driven into entirely blackly, then in second segment, be driven into complete whitely, finally in the 3rd section, be driven into GTG.As shown in Figure 3, being driven into the complete black response time needs 440ms, and being driven into the complete white response time needs 420ms.The waveform composition of so traditional EPD screen is: 440ms black+420ms white+to be driven into GTG needed black.
Chinese patent literature CN102543000A is the immediate prior art of the present invention.
Summary of the invention
The object of the present invention is to provide another kind to be applied to the waveform adjustment method of EPD screen, be intended to make EPD screen to there is more excellent display characteristic.
Technical scheme of the present invention is as follows:
A waveform adjustment method that is applied to EPD screen, comprises the following steps: first EPD screen is driven into the most stable inclined to one side grey black rank, then EPD screen is driven into the most stable inclined to one side lime rank, finally EPD screen is driven into GTG; The waveform composition of EPD screen is: black+the most stable inclined to one side lime rank on the most stable inclined to one side grey black rank white+to be driven into GTG needed black.
The most stable described inclined to one side grey black rank are that the test of 2 minute retention time is carried out in inclined to one side grey black rank, choose the most stable GTG of retention time in inclined to one side grey black rank.
The most stable described inclined to one side lime rank are that the test of 2 minute retention time is carried out in inclined to one side lime rank, choose the most stable GTG of retention time in inclined to one side lime rank.
Its further technical scheme is:
When darker GTG, be divided into three kinds of adjustment methods than the most stable inclined to one side grey black rank in debugging: be 1. driven into the most stable inclined to one side lime rank, the most stable inclined to one side grey black rank+be driven into+VCOM time+be driven into GTG needed black; 2. be directly driven into black; 3. being driven into Bai Houzai is driven into black.
When whiter GTG, be divided into three kinds of adjustment methods than the most stable inclined to one side lime rank in debugging: be 1. driven into the most stable inclined to one side lime rank, the most stable inclined to one side grey black rank+be driven into+VCOM time+be driven into GTG needed black; 2. be directly driven into white; 3. be driven into be driven into again after black white.
Useful technique effect of the present invention is:
Adopt waveform adjustment method of the present invention, have the following advantages: 1. driving time is short, fast response time; 2. the retention time is stable; 3. contrast is high; 4.EPD shields long service life; 5. low in energy consumption; 6. word refreshes smoothness; 7. tester's debugging cycle shortens.
The aspect that the present invention is additional and advantage will provide in the description of embodiment part below, and part will become obviously from the following description, or recognize by practice of the present invention.
Brief description of the drawings
Fig. 1 is the ultimate principle figure that EPD screen display is shown.
Fig. 2 is the test pattern of response time.
Fig. 3 is the schematic diagram that traditional waveform is debugged.
Fig. 4 is the test pattern on inclined to one side grey black rank the most stable in the present invention.
Fig. 5 is the test pattern on inclined to one side lime rank the most stable in the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
The present invention, on the basis of traditional waveform debugging, increases inclined to one side grey black rank and 2 minute retention time test on lime rank partially.Choose the most stable GTG of retention time in inclined to one side grey black rank, and the most stable GTG of retention time in inclined to one side lime rank.
As shown in Figure 4, in one embodiment, it be that the value of 1.5,1 GTG black lightness L* after 2 minutes moves back be that the value of 1.8,0 GTG black lightness L* after 2 minutes moves back is 2 that the value of 2 GTG black lightness L* after 2 minutes is moved back.In grey black rank, the value of 2 GTGs is moved back minimum partially, and the retention time is the most stable, and therefore choosing 2 GTGs is the most stable inclined to one side grey black rank.
As shown in Figure 5, in one embodiment, it be that the value of 2.0,14 GTG white lightness L* after 2 minutes moves back be that the value of 1.4,13 GTG white lightness L* after 2 minutes moves back is 1.8 that the value of 15 GTG white lightness L* after 2 minutes is moved back.In lime rank, the value of 14 GTGs is moved back minimum partially, and the retention time is the most stable, and therefore choosing 14 GTGs is the most stable inclined to one side lime rank.
Behind the most stable selected inclined to one side grey black rank and the most stable inclined to one side lime rank, waveform debugging of the present invention divides three sections: first paragraph is driven into the most stable inclined to one side grey black rank, and second segment is driven into the most stable inclined to one side lime rank, and the 3rd section is driven into GTG.Waveform of the present invention composition is: black+the most stable inclined to one side lime rank on the most stable inclined to one side grey black rank white+to be driven into GTG needed black.
In debugging, than the most stable inclined to one side grey black rank when darker GTG, the present invention can be divided into three kinds of adjustment methods: be driven into the most stable inclined to one side lime rank, the most stable inclined to one side grey black rank+be driven into+VCOM time+be driven into GTG needed black 1.; 2. be directly driven into black; 3. being driven into Bai Houzai is driven into black.
In debugging, than the most stable inclined to one side lime rank when whiter GTG, the present invention can be divided into three kinds of adjustment methods: be driven into the most stable inclined to one side lime rank, the most stable inclined to one side grey black rank+be driven into+VCOM time+be driven into GTG needed black 1.; 2. be directly driven into white; 3. be driven into be driven into again after black white.
Above-mentioned the 1st kind of mode adds the VCOM time in debugging, can make the retention time more stable, makes the GTG that is driven into more black than directly driving, whiter than directly driving.
Above-described is only the preferred embodiment of the present invention, the invention is not restricted to above embodiment.Be appreciated that the oher improvements and changes that those skilled in the art directly derive or associate without departing from the basic idea of the present invention, within all should thinking and being included in protection scope of the present invention.
Claims (5)
1. a waveform adjustment method that is applied to EPD screen, is characterized in that comprising the following steps: first EPD screen is driven into the most stable inclined to one side grey black rank, then EPD screen is driven into the most stable inclined to one side lime rank, finally EPD screen is driven into GTG; The waveform composition of EPD screen is: black+the most stable inclined to one side lime rank on the most stable inclined to one side grey black rank white+to be driven into GTG needed black.
2. the waveform adjustment method that is applied to according to claim 1 EPD screen, is characterized in that: the most stable described inclined to one side grey black rank are that the test of 2 minute retention time is carried out in inclined to one side grey black rank, choose the most stable GTG of retention time in inclined to one side grey black rank.
3. the waveform adjustment method that is applied to according to claim 1 EPD screen, is characterized in that: the most stable described inclined to one side lime rank are that the test of 2 minute retention time is carried out in inclined to one side lime rank, choose the most stable GTG of retention time in inclined to one side lime rank.
4. according to the waveform adjustment method that is applied to EPD screen described in claim 1 or 2 or 3, it is characterized in that: when darker GTG, be divided into three kinds of adjustment methods than the most stable inclined to one side grey black rank in debugging: be 1. driven into the most stable inclined to one side lime rank, the most stable inclined to one side grey black rank+be driven into+VCOM time+be driven into GTG needed black; 2. be directly driven into black; 3. being driven into Bai Houzai is driven into black.
5. according to the waveform adjustment method that is applied to EPD screen described in claim 1 or 2 or 3, it is characterized in that: when whiter GTG, be divided into three kinds of adjustment methods than the most stable inclined to one side lime rank in debugging: be 1. driven into the most stable inclined to one side lime rank, the most stable inclined to one side grey black rank+be driven into+VCOM time+be driven into GTG needed black; 2. be directly driven into white; 3. be driven into be driven into again after black white.
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| CN201210310449.9A CN102855847B (en) | 2012-08-28 | 2012-08-28 | Waveform debugging method applied to EPD (electrophoretic display) screen |
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| CN201210310449.9A CN102855847B (en) | 2012-08-28 | 2012-08-28 | Waveform debugging method applied to EPD (electrophoretic display) screen |
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| CN109448615B (en) * | 2018-11-28 | 2021-12-28 | 江西兴泰科技有限公司 | Automatic debugging method for electronic paper driving waveform |
| CN111276104B (en) * | 2020-03-31 | 2022-04-15 | 华南师范大学 | Driving method and driving device of electrophoretic display and waveform generator |
Citations (5)
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|---|---|---|---|---|
| CN1886776A (en) * | 2003-11-25 | 2006-12-27 | 皇家飞利浦电子股份有限公司 | Display apparatus having display device and circular orbit stabilizing method for driving the display device |
| CN101542384A (en) * | 2007-06-15 | 2009-09-23 | 株式会社理光 | Spatially masked update for electronic paper displays |
| WO2010095686A1 (en) * | 2009-02-19 | 2010-08-26 | セイコーインスツル株式会社 | Method for driving dot-matrix display using bistable nematic liquid crystal |
| CN102136238A (en) * | 2010-01-22 | 2011-07-27 | 兆宏电子股份有限公司 | Driving method of electronic paper display |
| CN102543000A (en) * | 2010-12-06 | 2012-07-04 | 乐金显示有限公司 | Electrophoretic display apparatus, method for driving the same, and method for measuring image stability thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5081583B2 (en) * | 2007-10-31 | 2012-11-28 | 株式会社リコー | Image display apparatus and control method thereof |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1886776A (en) * | 2003-11-25 | 2006-12-27 | 皇家飞利浦电子股份有限公司 | Display apparatus having display device and circular orbit stabilizing method for driving the display device |
| CN101542384A (en) * | 2007-06-15 | 2009-09-23 | 株式会社理光 | Spatially masked update for electronic paper displays |
| WO2010095686A1 (en) * | 2009-02-19 | 2010-08-26 | セイコーインスツル株式会社 | Method for driving dot-matrix display using bistable nematic liquid crystal |
| CN102136238A (en) * | 2010-01-22 | 2011-07-27 | 兆宏电子股份有限公司 | Driving method of electronic paper display |
| CN102543000A (en) * | 2010-12-06 | 2012-07-04 | 乐金显示有限公司 | Electrophoretic display apparatus, method for driving the same, and method for measuring image stability thereof |
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Address after: 214028 J1 factory building, 3 block, exit processing zone, new Wu, Jiangsu, Wuxi Patentee after: WUXI VISION PEAK TECHNOLOGY Co.,Ltd. Address before: 214028, J1, block 3, export processing zone, Wuxi New District, Jiangsu Patentee before: WUXI VISION PEAK TECHNOLOGY Co.,Ltd. |
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Denomination of invention: Waveform debugging method applied to EPD (electrophoretic display) screen Effective date of registration: 20170510 Granted publication date: 20140924 Pledgee: Agricultural Bank of China Limited by Share Ltd. Wuxi science and Technology Branch Pledgor: WUXI VISION PEAK TECHNOLOGY Co.,Ltd. Registration number: 2017990000395 |
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Date of cancellation: 20200317 Granted publication date: 20140924 Pledgee: Agricultural Bank of China Limited by Share Ltd. Wuxi science and Technology Branch Pledgor: Wuxi Vision Peak Technology Co.,Ltd. Registration number: 2017990000395 |
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Denomination of invention: Waveform debugging method applied to EPD (electrophoretic display) screen Effective date of registration: 20200317 Granted publication date: 20140924 Pledgee: Agricultural Bank of China Limited by Share Ltd. Wuxi science and Technology Branch Pledgor: Wuxi Vision Peak Technology Co.,Ltd. Registration number: Y2020990000189 |
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Date of cancellation: 20221126 Granted publication date: 20140924 Pledgee: Agricultural Bank of China Limited by Share Ltd. Wuxi science and Technology Branch Pledgor: WUXI VISION PEAK TECHNOLOGY Co.,Ltd. Registration number: Y2020990000189 |