CN105225640B - A kind of black picture voltage compensating method of the data driver of OLED display - Google Patents
A kind of black picture voltage compensating method of the data driver of OLED display Download PDFInfo
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- CN105225640B CN105225640B CN201410246823.2A CN201410246823A CN105225640B CN 105225640 B CN105225640 B CN 105225640B CN 201410246823 A CN201410246823 A CN 201410246823A CN 105225640 B CN105225640 B CN 105225640B
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000005611 electricity Effects 0.000 claims description 12
- 239000010409 thin film Substances 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
The invention discloses a kind of black picture voltage compensating method of data driver of OLED display, comprise the following steps：Some set point voltages are provided, the set point voltage comprises at least most high plateau voltage, lowest-order voltage and at least single order voltage between the most high plateau voltage and lowest-order voltage；Voltage curve based on the set point Voltage Establishment data driver；The setting of the most high plateau voltage is independently gone out into the voltage curve；Individually draw high the most high plateau voltage.By individually giving black picture voltage, by its independent adjustment, increase circuit operation scope, and do not influence the setting of other gray scale voltages, its gap with a secondary gray scale voltage can be widened by the independent black picture voltage setting, increase the tolerance to thin film transistor (TFT) (TFT) component leakage current, can reduce causes picture pico- shinny because of the influence of component leakage current and influence contrast problem.
Description
Technical field
The present invention relates to a kind of OLED display field, more particularly to a kind of black picture of the data driver of OLED display
Voltage compensating method.
Background technology
Controller (timing controller), data driver (data are interrogated when OLED display mainly includes at present
Driver), scan line driver (scan driver), and laser controlling line drive (emission control line
driver).And data driver voltage (Gamma) setting it is general all use with LCD identical methods, imply that the number of black picture
About there was only 10mV gap according to the data voltage of voltage and time single order, as long as the storage capacitors of picture element cause voltage drop because of electric leakage
It is luminous thus influence the brightness of black picture that panel is then easily lead to when low, and then reduces contrast.
Fig. 1 is the 2T1C pixel design schematic diagrames of current OLED display product, and Fig. 2 is that the voltage of its data driver is bent
Line, Fig. 3 are the circuit diagrams of data driver, and the voltage of data driver is provided by voltage source 3.Establishing data driver
Voltage curve when, by give some set point voltages come the slope of the voltage curve of determination data driver.With reference to Fig. 2 and
Shown in Fig. 3, using the white rank of picture 0 as lowest-order, using the black rank of picture 255 as most high-order, and from the white rank of picture 0 and black picture
Further take out 63 ranks, 127 ranks, 191 ranks between 255 ranks, form 0,1,2,3,4 totally 5 set points, give includes 0 rank, 63 respectively
The set point voltage of 5 GTG set points including rank, 127 ranks, 191 ranks and 255 ranks, so that it is determined that the voltage of data driver
Curve 20, and adjust the voltage curve 20 by adjusting the value of each set point voltage.But this method can not independently will be black
The rank voltage high of picture 255, because secondly the rank voltage of single order 245 also can be and then driven high, it can thus influence picture and show.And
The black rank voltage of picture 255 and time rank voltage difference of single order 254 are away from very little, when the electricity of the data driver (data) of the black rank of picture 255
The thin film transistor (TFT) (TFT) 22 that pressure deposits into scan line driver (scan driver) after storage capacitance 21 can close, but store
The voltage of electric capacity 21 can cause to deposit via the leakage current of the thin film transistor (TFT) (TFT) 22 of scan line driver (scan driver)
The voltage that storing up electricity holds 21 declines, and the voltage of storage capacitance 21 declines the thin film transistor (TFT) (DTFT) 23 that can cause data driver
Vgs voltages (Vgs be between metal-oxide-semiconductor grid and source electrode between voltage) rise cause originally should be closed data drive
The thin film transistor (TFT) (DTFT) 23 of dynamic device is gradually opened thus produces an IOLEDElectric current causes Organic Light Emitting Diode (OLED) 24
Panel lights, so as to reduce the image display quality of the panel of Organic Light Emitting Diode (OLED) 24 and contrast.
The content of the invention
The technical problems to be solved by the invention are to provide one kind and can be adjusted black picture voltage is independent, and
A kind of black picture voltage compensating method of data driver of OLED display of other gray scale voltage settings is not influenceed.
To realize above-mentioned technique effect, the invention discloses a kind of black picture voltage of data driver of OLED display to mend
Compensation method, comprise the following steps：
Some set point voltages are provided, the set point voltage comprises at least most high plateau voltage, lowest-order voltage and position
At least single order voltage between the most high plateau voltage and lowest-order voltage；
Voltage curve based on the set point Voltage Establishment data driver；
The setting of the most high plateau voltage is independently gone out into the voltage curve；
Individually draw high the most high plateau voltage.
Further improve of the invention is, the setting of the most high plateau voltage is independently gone out into the electricity by following steps
Buckle line：
An independent voltage source is provided to the most high-order power voltage supply.
Further improve of the invention is, the setting of the most high plateau voltage is independently gone out into the electricity by following steps
Buckle line：
One independent set point is increased to the secondary single order voltage of the most high plateau voltage.
The present invention discloses a kind of black picture voltage compensating method of data driver of OLED display, including following step again
Suddenly：
Some set point voltages are provided, the set point voltage comprises at least most high plateau voltage, lowest-order voltage and position
At least single order voltage between the most high plateau voltage and lowest-order voltage, wherein the lowest-order voltage and described being located at
At least single order voltage between the most high plateau voltage and lowest-order voltage is powered by first voltage source, the most high plateau voltage by
The second voltage source is powered；
Voltage curve based on data driver described in the set point Voltage Establishment；And
Draw high the most high plateau voltage.
As a result of above technical scheme, make it have following beneficial effect is the present invention：It is independent by providing one
Voltage source gives black picture power voltage supply, or increases by an independent set point to the secondary single order voltage of black picture voltage, by black picture
Face voltage independently goes out voltage curve, and it is individually adjusted, and increases circuit operation scope, and do not influence other gray scale voltages
Setting, can widen its gap with a secondary gray scale voltage by drawing high the independent black picture voltage, increase brilliant to film
The tolerance of body pipe (TFT) component leakage current, cause picture micro- because of the influence of thin film transistor (TFT) (TFT) component leakage current so as to reduce
It is micro- shinny and influence contrast problem.
Brief description of the drawings
Fig. 1 is the 2T1C pixel design schematic diagrames of current OLED display product.
Fig. 2 is the voltage curve of the data driver of existing OLED display.
Fig. 3 is the circuit diagram of Fig. 2 data driver.
Fig. 4 is the electricity of the first embodiment of the black picture voltage compensating method of data driver of OLED display of the present invention
Press compensated curve figure.
Fig. 5 is the electricity of the first embodiment of the black picture voltage compensating method of data driver of OLED display of the present invention
Press compensation circuit schematic diagram.
Fig. 6 is the electricity of black second of embodiment of picture voltage compensating method of data driver of OLED display of the present invention
Press compensated curve figure.
Fig. 7 is the electricity of black second of embodiment of picture voltage compensating method of data driver of OLED display of the present invention
Press compensation circuit schematic diagram.
Embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention is further detailed explanation.
Referring initially to shown in Fig. 4, the invention discloses a kind of black picture voltage compensation of data driver of OLED display
Method, comprise the following steps：
First, some set point voltages are provided, including the rank of set point GTG 0,63 ranks, 127 ranks, the electricity of 191 ranks and 255 ranks
Pressure, including the most rank voltage of high plateau voltage 255, the rank voltage of lowest-order voltage 0 and positioned at the most rank voltage of high plateau voltage 255 with
63 rank voltages, 127 rank voltages and 191 rank voltages between the most rank voltage of high plateau voltage 0；
Then, the voltage curve 10 based on above-mentioned set point Voltage Establishment data driver；
Then, the setting of the most rank voltage of high plateau voltage 255 is independently gone out into voltage curve 10 so that adjusting 255 rank voltages
When, do not interfere with the voltage of other GTGs；
Finally, the most rank voltage of high plateau voltage 255 is individually drawn high, increases the tolerance to thin film transistor (TFT) (TFT) component leakage current
Degree, avoid causing picture pico- shinny because of the influence of thin film transistor (TFT) (TFT) component leakage current and influenceing contrast problem.
Coordinate shown in Fig. 4 and Fig. 5, the first better embodiment as the present invention, there is provided an independent second voltage
255 rank power voltage supplies of most high-order are given in source 2, and the setting of 255 rank voltages of most high-order independently gone out into voltage curve 10, and remaining
Gray scale voltage beyond the most rank voltage of high-order 255 is then powered by first voltage source 1.When the 255 rank voltages for needing adjustment most high-order
Shi Ze is adjusted by the second voltage source 2, does not interfere with the voltage of other GTGs.
As second of embodiment of the present invention, with reference to shown in Fig. 6 and Fig. 7, to secondary the one of 255 rank voltages of most high-order
The rank voltage of rank 254 increases by an independent set point, forms 6 set points, time rank of single order 254 is had independent set point electricity
Pressure.In the case where the secondary rank voltage of single order 254 is set, then 255 rank voltages are adjusted, other GTGs 0~254 would not be had influence on
The voltage of rank, so as to which the setting of 255 rank voltages is independently gone out into voltage curve 10.
The black picture voltage compensating method of data driver of the OLED display of the present invention is by providing an independent voltage
Black picture power voltage supply is given in source, or increases by an independent set point to the secondary single order voltage of black picture voltage, by black picture electricity
Pressure independently goes out voltage curve, and it is individually adjusted, and increases circuit operation scope, and do not influence setting for other gray scale voltages
It is fixed, its gap with a secondary gray scale voltage can be widened by the independent black picture voltage setting, increased to thin film transistor (TFT)
(TFT) tolerance of component leakage current, can reduce causes picture pico- shinny because of the influence of component leakage current and influences contrast and ask
Topic.
The present invention is described in detail above in association with accompanying drawing embodiment, those skilled in the art can be according to upper
State and bright many variations example is made to the present invention.Thus, some details in embodiment should not form limitation of the invention, this
Invention will be used as protection scope of the present invention using the scope that appended claims define.
Claims (3)
1. a kind of black picture voltage compensating method of the data driver of OLED display, it is characterised in that comprise the following steps：
Some set point voltages are provided, the set point voltage comprises at least most high plateau voltage, lowest-order voltage and positioned at institute
State at least single order voltage between most high plateau voltage and lowest-order voltage；
Voltage curve based on data driver described in the set point Voltage Establishment；
An independent voltage source is provided to the most high-order power voltage supply, the setting of the most high plateau voltage is independently gone out into the electricity
Buckle line；And
Individually draw high the most high plateau voltage.
2. the method as described in claim 1, it is characterised in that by following steps that the setting of the most high plateau voltage is independent
Go out the voltage curve：
One independent set point is increased to the secondary single order voltage of the most high plateau voltage.
3. a kind of black picture voltage compensating method of the data driver of OLED display, it is characterised in that comprise the following steps：
Some set point voltages are provided, the set point voltage comprises at least most high plateau voltage, lowest-order voltage and positioned at institute
At least single order voltage between most high plateau voltage and lowest-order voltage is stated, wherein the lowest-order voltage and described positioned at described
At least single order voltage between most high plateau voltage and lowest-order voltage is powered by first voltage source, and the most high plateau voltage is by second
Voltage fed；
Voltage curve based on data driver described in the set point Voltage Establishment；And
Draw high the most high plateau voltage.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410246823.2A CN105225640B (en) | 2014-06-05 | 2014-06-05 | A kind of black picture voltage compensating method of the data driver of OLED display |
| JP2014152528A JP2015230483A (en) | 2014-06-05 | 2014-07-28 | Black screen voltage compensation method for organic el display data driver |
| TW103126355A TW201546790A (en) | 2014-06-05 | 2014-08-01 | Black screen voltage compensation method for a data driver of an OLED display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410246823.2A CN105225640B (en) | 2014-06-05 | 2014-06-05 | A kind of black picture voltage compensating method of the data driver of OLED display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105225640A CN105225640A (en) | 2016-01-06 |
| CN105225640B true CN105225640B (en) | 2018-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410246823.2A Active CN105225640B (en) | 2014-06-05 | 2014-06-05 | A kind of black picture voltage compensating method of the data driver of OLED display |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2015230483A (en) |
| CN (1) | CN105225640B (en) |
| TW (1) | TW201546790A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109523955B (en) * | 2019-01-03 | 2020-07-07 | 京东方科技集团股份有限公司 | Pixel compensation method and device, storage medium and display screen |
| CN110033735B (en) * | 2019-04-25 | 2021-01-26 | 京东方科技集团股份有限公司 | Drive IC, OLED display panel and display device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1677467A (en) * | 2004-03-30 | 2005-10-05 | 索尼株式会社 | Drive circuit of flat panel display device and flat panel display device |
| CN1680987A (en) * | 2004-04-08 | 2005-10-12 | 索尼株式会社 | Device circuit for flat display apparatus and flat display apparatus |
| CN101421772A (en) * | 2006-09-25 | 2009-04-29 | 卡西欧计算机株式会社 | Display driving apparatus and method for driving display driving apparatus, and display apparatus and method for driving display apparatus |
| CN101520983A (en) * | 2008-02-28 | 2009-09-02 | 三星移动显示器株式会社 | Organic light emitting display and driving method thereof |
| CN101527124A (en) * | 2008-03-07 | 2009-09-09 | 瀚宇彩晶股份有限公司 | Driving method of liquid crystal display |
| JP2012137788A (en) * | 2005-03-18 | 2012-07-19 | Semiconductor Energy Lab Co Ltd | Semiconductor device and electronic apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3741079B2 (en) * | 2002-05-31 | 2006-02-01 | ソニー株式会社 | Display device and portable terminal |
| JP2006313189A (en) * | 2005-05-06 | 2006-11-16 | Seiko Epson Corp | LIGHT EMITTING DEVICE, ITS DRIVE METHOD, AND ELECTRONIC DEVICE |
-
2014
- 2014-06-05 CN CN201410246823.2A patent/CN105225640B/en active Active
- 2014-07-28 JP JP2014152528A patent/JP2015230483A/en active Pending
- 2014-08-01 TW TW103126355A patent/TW201546790A/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1677467A (en) * | 2004-03-30 | 2005-10-05 | 索尼株式会社 | Drive circuit of flat panel display device and flat panel display device |
| CN1680987A (en) * | 2004-04-08 | 2005-10-12 | 索尼株式会社 | Device circuit for flat display apparatus and flat display apparatus |
| JP2012137788A (en) * | 2005-03-18 | 2012-07-19 | Semiconductor Energy Lab Co Ltd | Semiconductor device and electronic apparatus |
| CN101421772A (en) * | 2006-09-25 | 2009-04-29 | 卡西欧计算机株式会社 | Display driving apparatus and method for driving display driving apparatus, and display apparatus and method for driving display apparatus |
| CN101520983A (en) * | 2008-02-28 | 2009-09-02 | 三星移动显示器株式会社 | Organic light emitting display and driving method thereof |
| CN101527124A (en) * | 2008-03-07 | 2009-09-09 | 瀚宇彩晶股份有限公司 | Driving method of liquid crystal display |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105225640A (en) | 2016-01-06 |
| JP2015230483A (en) | 2015-12-21 |
| TW201546790A (en) | 2015-12-16 |
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Address after: 1568 Jiugong Road, Jinshan Industrial Zone, Jinshan District, Shanghai, 201506 Patentee after: Shanghai Hehui optoelectronic Co., Ltd Address before: 201508, building two, building 100, 1, Jinshan Industrial Road, 208, Shanghai, Jinshan District Patentee before: EverDisplay Optronics (Shanghai) Ltd. |