CN104732912B - Data drive method, data driver and AMOLED displayer - Google Patents
Data drive method, data driver and AMOLED displayer Download PDFInfo
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Abstract
The invention provides a data drive method, a data driver and an AMOLED displayer. When a line charging time Gi of a certain sub-frame is greater than or equal to a charging time threshold value Gth, standard drive voltage Vdata is adopted for driving; when the line charging time Gi of a certain sub-frame is smaller than the charging time threshold value Gth, a drive voltage value Vdi of the sub-frame is increased so that the drive voltage value of the sub-frame can be greater than the standard drive voltage Vdata, wherein i represents a sub-frame number. By means of the technical scheme, the pixel charging speed of the sub-frame insufficient in charging time can be effectively improved, charging of the sub-frame can be completed and accurate gray scale data can be obtained within shorter time so as to ensure that accurate gray scale information can be obtained during picture composition, and color distortion is not caused.
Description
Technical field
The present invention relates to plane display field, more particularly to a kind of data-driven displayer method and application should
The data driver of method and a kind of displayer.
Background technology
In flat panel display, AMOLED（Active Matrix Organic Light Emitting Diode- have
Source matrix organic light emitting display）So which is frivolous, actively luminous, fast response time, wide viewing angle, rich color and high brightness,
The advantages of low-power consumption, high-low temperature resistant, high-performance it has been applied to and during large scale shows, and has progressively become new the one of display field
For Display Technique.
The pixel of the M × N rows generally comprised in displayer, which utilizes line scan signals and data voltage signal pair
Pixel is scanned, and when some pixel is scanned then by line scan signals, data voltage signal will be charged to pixel,
Pixel voltage charges to the magnitude of voltage is input into by data voltage signal, pixel normal luminous within the regular hour.
In existing data driven technique, a complete frame picture is showed using 8 subframes, using the luma residual of human eye
Effect shows different GTGs.As shown in figure 1, for picture building-up process schematic diagram in data driven technique, wherein SF1-SF8Point
Not Wei different subframe when the picture that obtains, final eight pictures synthesis obtains final picture 1.The gray level information of picture 1 is：
To show grey exponent number, m represents line number to D, and n represents columns, and i is subframe ordinal number, and B is sub-frame data, is 1 or 0.
Above-mentioned 8 subframe times are distributed as shown in Fig. 2 ti=T/2i, wherein T represents the frame period.Rate of scanning is 60Hz's
Displayer, its frame period T=1/60=16.7ms.Every height in a frame data is calculated according to above-mentioned formula then
The frame corresponding time is respectively：t1=8.35ms；t2=4.175ms；t3=2.09ms；t4=1.04ms；t5=0.52ms；t6=
0.26ms；t7=0.13ms；t8=0.0652ms。
For the displayer that resolution is 240 × 320,（Including 240 rows, 320 row pixels）If, vertical blank
If set of time is 40 rows（Vertical blanking time is more than 16 behavior zone of reasonableness）, for the row charging interval of each subframe
Respectively：Gi=ti/ line number=ti/(240+40）=ti/280.Can be calculated according to above formula, G1=30us；G2=15us；G3=
7.5us；G4=3.75us；G5=1.9us；G6=0.85us；G7=0.43us；G8=0.215us.And in displayer, which is each
There is a minimum in the row charging interval in individual subframe, and such as resolution is the minimum in 240 × 320 displayer
For in 0.9us or so, therefore the row charging interval of above-mentioned 8 subframes, subframe SF7And SF8Charging interval just well below this most
The low charging interval.Therefore subframe SF7And SF8Charging interval it is not enough, cause gray level information to be lost, the technology of picture color distortion
Defect.
The content of the invention
The technical problem to be solved be in prior art in data-driven displayer due to row charging
Deficiency of time causes gray level information to be lost, picture distortion, and then provides a kind of data-driven method of displayer.
To solve above-mentioned technical problem, the present invention is achieved by the following technical solutions：
The present invention provides a kind of data-driven method, arranges driving voltage value according to the row charging interval of different subframes, when
The row charging interval G of a certain subframeiLess than charging time threshold GthWhen, increase the driving voltage value V of the subframedi, make Vdi>
Vdata；Wherein i represents subframe sequence number, VdataOn the basis of driving voltage.
Above-mentioned data-driven method, as the row charging interval G of a certain subframeiLess than charging time threshold GthWhen, utilize
Equation below is obtained increases multiple value A, A=charging time threshold GthThe row charging interval G of/subframei；Increase the drive of the subframe
Dynamic magnitude of voltage makes Vdi≥A×Vdata。
Above-mentioned data-driven method, the driving voltage value V of first subframe to the 6th subframedi=Vdata, 1≤i≤6；
The driving voltage value V of the 7th subframed7≥2Vdata；The driving voltage value V of the 8th subframed8≥4Vdata。
Above-mentioned data-driven method, the driving voltage value V of the 7th subframed7=2Vdata；The driving electricity of the 8th subframe
Pressure value Vd8=4Vdata。
The present invention also provides a kind of data driver, according to above-mentioned data-driven method outputting drive voltage.
The present invention also provides a kind of displayer, using above-mentioned data driver outputting drive voltage.
The above-mentioned technical proposal of the present invention has advantages below compared to existing technology：
（1）Data-driven method of the present invention and data driver and displayer, when a certain subframe
Row charging interval GiLess than charging time threshold GthWhen, increase the driving voltage value V of the subframedi, make Vdi>Vdata；Wherein i is represented
Subframe sequence number, VdataOn the basis of driving voltage, the pixel charging rate of charging interval not enough subframe can be effectively improved so as to
Can complete in the short period of time to charge, obtain accurate luma data, to guarantee accurate GTG is obtained during synthesising picture
Information, does not result in color distortion.
（2）Data-driven method of the present invention and data driver and displayer, when a certain subframe
Row charging interval GiLess than charging time threshold GthWhen, being obtained using equation below increases multiple value A, A=charging time thresholds
GthThe row charging interval G of/subframei；The driving voltage value for increasing the subframe makes Vdi≥A×Vdata.Using above-mentioned set-up mode,
Can be that pixel just completes to charge in the linear stage in charging interval, effectively reduce the charging interval of pixel, raising is filled
Electric speed.
（3）Data-driven method of the present invention and data driver and displayer, first subframe is extremely
The driving voltage value V of the 6th subframedi=Vdata, 1≤i≤6, the driving voltage value V of the 7th subframed7=2Vdata, the 8th sub
The driving voltage value V of framed8=4Vdata.By above-mentioned setting, the charge efficiency of the 7th subframe and the 8th subframe can be effectively improved,
Will not make the power of consumption excessive again, be obtained in that accurate luma data, the gray level information of the picture for finally giving will not be lost
Lose, color also will not distortion.
Description of the drawings
In order that present disclosure is more likely to be clearly understood, below in conjunction with the accompanying drawings, the present invention is made further in detail
Thin explanation, wherein,
Fig. 1 is the schematic diagram of picture synthesis in data driven technique；
Fig. 2 is each subframe time relations of distribution schematic diagram in available data actuation techniques；
Fig. 3 is each subframe time relations of distribution described in one embodiment of the invention and the corresponding driving voltage of each subframe
Relation schematic diagram；
Fig. 4 a and Fig. 4 b are that one embodiment of the invention subfield pixels charging rate is charged with prior art neutron field pixel
Velocity contrast's schematic diagram；
Fig. 5 is a kind of structural representation of displayer.
Specific embodiment
Embodiment 1
The present embodiment provides a kind of data-driven method, arranges driving voltage value according to the row charging interval of different subframes,
As the row charging interval G of a certain subframeiLess than charging time threshold GthWhen, increase the driving voltage value V of the subframedi, make Vdi>
Vdata；Wherein i represents subframe sequence number, VdataOn the basis of driving voltage.
The row charging interval in 8 subframes in each subframe has been calculated respectively in the application background section.
And for being directed to the display of different line numbers and columns, the charging time threshold corresponding to which may be different.Such as 240
The displayer of row, 320 row, its charging time threshold are 0.9us or so.In the first six subframe, due to enough
Charging interval, therefore can directly adopt benchmark driving voltage.Charging interval is not enough for the 7th subframe and the 8th subframe.This
When, when driving, increase the driving voltage value of the two subframes so as to higher than benchmark driving voltage value, the can be effectively improved
The pixel charging rate of seven subframes and the 8th subframe.And concrete driving voltage value rises to how many, can be according to the row charging interval
GiWith charging time threshold GthActual relationship determining, while it is contemplated that the power of display itself.
A kind of preferred version is provided in the present embodiment, as the row charging interval G of a certain subframeiLess than charging time threshold Gth
When, being obtained using equation below increases multiple value A, A=charging time threshold GthThe row charging interval G of/subframei；Increase the son
The driving voltage value of frame makes Vdi≥A×Vdata。
Equally by taking 240 rows, the displayers of 320 row as an example, charging time threshold is 0.9us or so, the present embodiment
In just with its charging time threshold GthAs a example by=0.9us, G therein7=0.43us, G8=0.215us, then for the 7th subframe A ≈
2, for the 8th subframe A ≈ 4.Then when driving, driving voltage value is as shown in figure 3, order：
The driving voltage value V of first subframe to the 6th subframedi=Vdata, 1≤i≤6.
The driving voltage value V of the 7th subframed7≥2Vdata, but the driving voltage value more faster power of high charge speed disappears
Consume also bigger, preferred V in the present embodimentd7=2Vdata。
The driving voltage value V of the 8th subframed8≥4Vdata, preferred Vd8=4Vdata。
Fig. 4 a and Fig. 4 b are given in the 7th subframe time section t7, adopt driving voltage value for VdataWith adopt driving voltage
It is worth for 2VdataCharging rate schematic diagram.Pixel charging process is divided into two stages, and 401,402 in figure are two stages
Boundary point.It is, shown in Fig. 4 a, to belong to linear stage from starting point to boundary point, fast in this stage pixel charging rate；Side
Boundary's point belongs to saturation stage at the end of, and the stage charging rate is slow.
For Fig. 4 a, need to reach benchmark driving voltage value V after charging completedata.But due to the relation of time,
Which does not also complete the charging of linear stage, and charging is just over, therefore t7 terminates rear pixel charging and is also not up to benchmark driving
Magnitude of voltage Vdata.For Fig. 4 b, need to reach two times of benchmark driving voltage value 2V after charging completedata.Although charge
Between it is shorter, during charging complete its also do not complete linear stage charging, but just charged in linear stage benchmark drive
Dynamic magnitude of voltage Vdata, that is, pixel charging complete at the end of charging.
Therefore, the such scheme that the present embodiment is provided, can effectively improve the charge efficiency of the 7th subframe and the 8th subframe,
Accurate luma data is obtained, the gray level information of the picture for finally giving will not be lost, and color also will not distortion.
Embodiment 2
The present embodiment provides a kind of data driver, in the row charging interval G that a certain son is detectdiMore than or equal to the charging interval
Threshold value GthWhen, its outputting drive voltage value is Vdata, VdataOn the basis of driving voltage；In the row charging interval G of a certain subframeiIt is little
In charging time threshold GthWhen, the driving voltage value of its output is VdiAnd Vdi>Vdata, wherein i represents subframe sequence number.
Above-mentioned data driver, when driving, increases the driving voltage value of the subframe of charging interval deficiency so as to higher than base
Quasi- driving voltage value, to improve the pixel charging rate of corresponding subframe.And concrete driving voltage value rises to how many, can basis
Row charging interval GiWith charging time threshold GthActual relationship determining, while it is contemplated that the power of display itself.
A kind of preferred version is provided in the present embodiment, in the row charging interval G of a certain subframeiLess than charging time threshold Gth
When, the driving voltage value V of its outputdi≥A×Vdata, wherein A=charging time thresholds GthThe row charging interval G of/subframei。
It is further preferable that driving voltage value V of first subframe to its output during the 6th subframedi=Vdata, 1≤i≤6.
The driving voltage value V of its output during the 7th subframed7=2Vdata, the driving voltage value V of its output during the 8th subframed8=
4Vdata。
Using above-mentioned data driver, the charge efficiency of the 7th subframe and the 8th subframe can be effectively improved, obtain accurate
Luma data, the gray level information of the picture for finally giving will not lose, and color also will not distortion.
Embodiment 3
The present embodiment provides a kind of displayer, structure as shown in figure 5, including：Multiple pixels, scanner driver and
Data driver.Multiple pixels are arranged in scan control signal Sn1, Sn2 and Sn3 and data wire D1 in the matrix form
To the intersection region of Dm.
Meanwhile, display unit receives outside the first power supply ELVDD for providing and second source ELVSS.Wherein, the first power supply
ELVDD is used as high level voltage source, and the second source ELVSS is used as low level voltage source.First power supply ELVDD and second electric
Source ELVSS is used as the driving power supply of pixel.
By outside offer（For example, provide from timing control unit）The scanner driver produces scan control signal
Si1 to Sin, and the scan control signal Si1 to Sin is sequentially supplied to into pixel.
By outside offer（For example, provide from timing control unit）The data driver produces data and Data Control
The corresponding data signal of signal, the data signal D1 to Dm that the data driver is produced are provided synchronously to respectively with scanning signal
Individual pixel.
Displayer in the present embodiment, is made using the data driver outputting drive voltage described in embodiment 2
For data signal D1-Dm, the charge efficiency of the 7th subframe and the 8th subframe can be effectively improved, obtain accurate luma data,
The gray level information of the picture for finally giving will not be lost, and color also will not distortion.
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description other multi-forms change or
Change.There is no need to be exhaustive to all of embodiment.And thus it is extended obvious change or
Among changing still in the protection domain of the invention.
Claims (5)
1. a kind of data-driven method, it is characterised in that：Driving voltage value is arranged according to the row charging interval of different subframes, when certain
The row charging interval G of one subframeiLess than charging time threshold GthWhen, arranging increases multiple value A, A=charging time threshold Gth/ should
The row charging interval G of subframei；Increase the driving voltage value V of the subframedi, make Vdi≥A×Vdata；Wherein i represents subframe sequence number,
VdataOn the basis of driving voltage.
2. data-driven method according to claim 1, it is characterised in that：The driving of first subframe to the 6th subframe
Magnitude of voltage Vdi=Vdata, 1≤i≤6；The driving voltage value V of the 7th subframed7≥2Vdata；The driving voltage value of the 8th subframe
Vd8≥4Vdata。
3. data-driven method according to claim 2, it is characterised in that：The driving voltage value V of the 7th subframed7=
2Vdata；The driving voltage value V of the 8th subframed8=4Vdata。
4. a kind of data driver, it is characterised in that according to the arbitrary described data-driven method output driving of claim 1-3
Voltage.
5. a kind of displayer, it is characterised in that using the data driver outputting drive voltage described in claim 4.
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| WO2023197758A1 (en) * | 2022-04-15 | 2023-10-19 | 深圳市洲明科技股份有限公司 | Led display screen driving system and method, and led display screen and storage medium |
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| CN101004886A (en) * | 2006-01-20 | 2007-07-25 | 株式会社半导体能源研究所 | Driving method of display device |
| CN101286295A (en) * | 2007-02-12 | 2008-10-15 | 三星电子株式会社 | Method and apparatus for digitally driving an amoled |
| CN101341525A (en) * | 2005-12-20 | 2009-01-07 | 汤姆森特许公司 | Method for displaying an image on an organic light emitting display and respective apparatus |
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| KR100882908B1 (en) * | 2007-06-21 | 2009-02-10 | 삼성모바일디스플레이주식회사 | Driving method of Organic Light Emitting Diode display device |
| JP5755045B2 (en) * | 2011-06-20 | 2015-07-29 | キヤノン株式会社 | Display device |
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| CN101341525A (en) * | 2005-12-20 | 2009-01-07 | 汤姆森特许公司 | Method for displaying an image on an organic light emitting display and respective apparatus |
| CN101004886A (en) * | 2006-01-20 | 2007-07-25 | 株式会社半导体能源研究所 | Driving method of display device |
| CN101286295A (en) * | 2007-02-12 | 2008-10-15 | 三星电子株式会社 | Method and apparatus for digitally driving an amoled |
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Effective date of registration: 20201214 Address after: No.146 Tianying Road, high tech Zone, Chengdu, Sichuan Province Patentee after: Chengdu CHENXIAN photoelectric Co.,Ltd. Address before: NO.320 Fuchunjiang Road, Optoelectronic Industrial Park, Kunshan Development Zone, Suzhou City, Jiangsu Province Patentee before: Kunshan New Flat Panel Display Technology Center Co.,Ltd. Patentee before: KunShan Go-Visionox Opto-Electronics Co.,Ltd. |
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