CN105448233B - The driving method and organic LED display device of OLED pixel - Google Patents
The driving method and organic LED display device of OLED pixel Download PDFInfo
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- CN105448233B CN105448233B CN201410425977.8A CN201410425977A CN105448233B CN 105448233 B CN105448233 B CN 105448233B CN 201410425977 A CN201410425977 A CN 201410425977A CN 105448233 B CN105448233 B CN 105448233B
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Abstract
The invention discloses the driving method and organic LED display device of a kind of OLED pixel, driving method includes：Set the first time interval T in the frame period of each scanning1；Set the acquiescence grayscale value of the OLED pixel；It calculates in the first time interval T1The OLED pixel is inside made to reach the first driving current I needed for the acquiescence grayscale value1；And it provides one and is more than the first driving current I1The second driving current I2, set the second time interval T2, in the second time interval T2The interior driving OLED pixel reaches the acquiescence grayscale value；Wherein, T1*I1=T2*I2.Raising electric current in the present invention and the fluorescent lifetime adjusted in each frame period are continuous so that the low grayscale electric current of driver chip output control more easily controls, and increases the application in high gradient panel.
Description
Technical field
The present invention relates to display actuation techniques field more particularly to a kind of driving methods of OLED pixel and organic light emission two
Pole pipe display device.
Background technology
Organic Light Emitting Diode (Organic Light Emitting Diode, OLED) belongs to carrier Dual Implantations type and shines
Device, the characteristic of electron luminescence is utilized in it, and luminescence mechanism is：Under the driving of external voltage, by the electronics of electrode injection
It is compound and give off energy, and transfer energy to the molecule of organic luminescent substance in organic material with hole, make its by
Excitation, from ground state transition to excitation state, the radiation transistion when excited molecule returns to ground state from excitation state and generate luminescence phenomenon.
The OLED device of active matrix driving can be divided into voltage driving and electric current driving, voltage according to its type of drive difference
Driving refers to that the input signal of pixel circuit is voltage signal, and electric current driving refers to pixel circuit using electric current as input signal
Type of drive.Current mode pixel-driving circuit is due to being direct electric current driving, and output and input are linear relationships, to electric current
It adjusts more convenient.But since each grayscale in the current driver mode of present is opposite by driver offer
The electric current answered just is susceptible to two problems in low current：First, drive circuit chip output low current is not easy to be refined control
System；Second, electric current is driven to constant-current charge, and in low current, the charging time can be long, limits the method in low current
Using.
According to scientific common sense, the brightness of human eye impression is integrated with intensity the time as a result, in current existing driving side
In formula, the most of the time of entire frame is luminous form, and Fig. 1 a- Fig. 1 b are respectively in each frame in current type of drive
Shine duration and the schematic diagram of size of current, and the horizontal axis in Fig. 1 b represents grayscale size, and the longitudinal axis represents electric current I sizes.
The Chinese patent of Publication No. CN102708798A provide a kind of pixel unit drive circuit, driving method, as
Plain unit and display device so that storage capacitance Cst charging rates are slower, especially to solve existing pixel unit actuation techniques
Under low grayscale, the charging time is very long, be not suitable for high-resolution, high refreshing frequency AMOLED display the problem of.The pixel
Cell driving circuit includes the 6th transistor, switch unit, storage capacitance, the first transistor and second transistor, the technical side
Case accelerates the charging rate to storage capacitance.Wherein Idata is larger current, so as to accelerate the charging speed to storage capacitance
Degree, the technical solution include the first stage in precharge stage (Precharge) and the second-order of glow phase (Update)
Section.
Invention content
In view of the above problems, the object of the present invention is to provide the driving methods and organic light emission of a kind of OLED pixel
Diode display, with improve OLED current driving in the shortcomings that so that driver chip output control low grayscale electric current
It more easily controls, increases the application in high gradient panel.
The purpose of the present invention can be achieved through the following technical solutions：
On the one hand, a kind of driving method of OLED pixel is provided comprising：
Set the first time interval T in the frame period of each scanning1；
Set the acquiescence grayscale value of the OLED pixel；
It calculates in the first time interval T1The OLED pixel is inside made to reach first needed for the acquiescence grayscale value
Driving current I1；And
It provides one and is more than the first driving current I1The second driving current I2, set the second time interval T2, described
Second time interval T2The interior driving OLED pixel reaches the acquiescence grayscale value；Wherein, T1*I1=T2*I2。
The driving method of above-mentioned OLED pixel, wherein, by the second driving current I2Increase to the first driving current I1
3 times, while will be in each first time interval T1Interior the second time interval T2It is adjusted to the first time
It is spaced T11/3.
On the other hand, a kind of driving method of OLED pixel is provided comprising：
Set the first time interval T in the frame period of each scanning1；
Set the acquiescence grayscale value of the OLED pixel；
It calculates in the first time interval T1The OLED pixel is inside made to reach first needed for the acquiescence grayscale value
Driving current I1；And
Second driving current I is provided2, in the second time interval T of setting2The interior driving OLED pixel reaches described silent
Recognize grayscale value；
Wherein described second driving current I2More than the first driving current I1And the second time interval T2Less than institute
State first time interval T1。
The driving method of above-mentioned OLED pixel, wherein, by the second driving current I2Increase to the first driving current I1
2 times, while will be in each first time interval T1Interior the second time interval T2It is adjusted to the first time
It is spaced T11/3.
The driving method of above-mentioned OLED pixel, wherein, by the second driving current I2Increase to the first driving current I1
3 times, while will be in each first time interval T1Interior the second time interval T2It is adjusted to the first time
It is spaced T11/2.
In another aspect, a kind of organic LED display device is provided, wherein, luminescence display is used as above-mentioned any one
The driving method of item OLED pixel.
Compared with the prior art, the beneficial effects of the present invention are：Different from accelerating in prior art to storage electricity
The charging rate of appearance needs to include a pre-charging stage, raising electric current in the present invention and adjusts in each frame period
Fluorescent lifetime is continuous so that the low grayscale electric current of driver chip output control more easily controls, and increases in high gradient
The application of panel.
Description of the drawings
Fig. 1 a show the duration schematic diagram that shines in each frame in existing type of drive；
Fig. 1 b show size of current curve synoptic diagram in existing type of drive；
Fig. 2 a show the duration that shines in the type of drive of the driving method embodiment one of OLED pixel of the present invention per frame
Schematic diagram；
Fig. 2 b show size of current curve in the type of drive of the driving method embodiment one of OLED pixel of the present invention
Schematic diagram；
Fig. 3 a show the duration that shines in the type of drive of the driving method embodiment two of OLED pixel of the present invention per frame
Schematic diagram；
Fig. 3 b show size of current curve in the type of drive of the driving method embodiment two of OLED pixel of the present invention
Schematic diagram；
Fig. 4 a show the duration that shines in the type of drive of the driving method embodiment three of OLED pixel of the present invention per frame
Schematic diagram；
Fig. 4 b show size of current curve in the type of drive of the driving method embodiment three of OLED pixel of the present invention
Schematic diagram.
Specific embodiment
With reference to schematic diagram and concrete operations embodiment, the invention will be further described.
The driving method of OLED pixel of the present invention, comprising：
Set the first time interval T in the frame period of each scanning1；
Set the acquiescence grayscale value of OLED pixel；
It calculates in first time interval T1OLED pixel is inside made to reach the first driving current I needed for acquiescence grayscale value1；And
It provides one and is more than the first driving current I1The second driving current I2, set the second time interval T2, in the second time
It is spaced T2Interior driving OLED pixel reaches acquiescence grayscale value；Wherein, T1*I1=T2*I2。
Alternatively,
A kind of driving method of OLED pixel is provided, comprising：
Set the first time interval T in the frame period of each scanning1；
Set the acquiescence grayscale value of OLED pixel；
It calculates in first time interval T1OLED pixel is inside made to reach the first driving current I needed for acquiescence grayscale value1；And
Second driving current I is provided2, in the second time interval T of setting2Interior driving OLED pixel reaches acquiescence grayscale value；
Wherein the second driving current I2More than the first driving current I1And the second time interval T2Less than first time interval
T1。
Embodiment one
As highly preferred embodiment of the present invention, as shown in Figure 2 a, by the second driving current I2Increase to the first driving current I1's
3 times, while will be in each first time interval T1The second interior time interval T2It is adjusted to first time interval T11/3, i.e.,
Mean that luminous brightness is improved to original 3 times, integrated since the brightness of human eye impression is the time with intensity as a result, allowing people
The brightness that is presented of type of drive after eye impression adjustment with it is original close.
Embodiment two
As the sub-optimal embodiment of the present invention, as shown in Figure 3a, by the second driving current I2Increase to the first driving current I1's
2 times, while will be in each first time interval T1The second interior time interval T2It is adjusted to first time interval T11/3, by
It is to be integrated with intensity as a result, the brightness that the type of drive after human eye impression is allowed to adjust is presented the time in the brightness of human eye impression
It is approached with original.
Embodiment three
The similary sub-optimal embodiment as the present invention, as shown in fig. 4 a, by the second driving current I2Increase to the first driving electricity
Flow I13 times, while will be in each first time interval T1The second interior time interval T2It is adjusted to first time interval T1's
1/2。
Present invention additionally encompasses a kind of organic LED display devices, include glass substrate, thin film transistor (TFT) array
Layer is located on the substrate and organic luminous layer is located in the thin film transistor array layer.Wherein described thin film transistor (TFT)
Array layer include array arrangement multiple thin film transistor (TFT)s (Thin Film Transistor, TFT), multi-strip scanning line with it is a plurality of
Data line, the organic luminous layer form multiple organic light-emitting diode pixels in the thin film transistor array layer, and by
By the multi-strip scanning line, the effect of multiple data lines and multiple thin film transistor (TFT)s drives the multiple Organic Light Emitting Diode picture
Element.Organic LED display device of the present invention uses the driving method such as above-mentioned OLED pixel, and each OLED pixel is driven to show
Show acquiescence grayscale value.
Raising electric current in the present invention and the fluorescent lifetime adjusted in each frame period are continuous so that driver
The low grayscale electric current of chip output control more easily controls, and increases the application in high gradient panel.
Specific embodiments of the present invention are described in detail above, but the present invention is not restricted to tool described above
Body embodiment, is intended only as example.To those skilled in the art, any equivalent modifications and replacement are also all in the present invention
Scope among.Therefore, made impartial conversion and modification without departing from the spirit and scope of the invention, should all cover
In the scope of the present invention.
Claims (6)
1. a kind of driving method of OLED pixel, which is characterized in that include：
Set the first time interval T in the frame period of each scanning1；
Set the acquiescence grayscale value of the OLED pixel；
It calculates in the first time interval T1The OLED pixel is inside made to reach the first driving electricity needed for the acquiescence grayscale value
Flow I1；And
It provides one and is more than the first driving current I1The second driving current I2, in the first time interval T1Interior setting the
Two time interval T2, in the second time interval T2The interior driving OLED pixel reaches the acquiescence grayscale value；Wherein, T1*
I1=T2*I2。
2. the driving method of OLED pixel as described in claim 1, which is characterized in that by the second driving current I2It is set as institute
State the first driving current I13 times, while will be in each first time interval T1Interior the second time interval T2It adjusts
Whole is the first time interval T11/3.
3. a kind of driving method of OLED pixel, which is characterized in that include：
Set the first time interval T in the frame period of each scanning1；
Set the acquiescence grayscale value of the OLED pixel；
It calculates in the first time interval T1The OLED pixel is inside made to reach the first driving electricity needed for the acquiescence grayscale value
Flow I1；And
Second driving current I is provided2, in the first time interval T1Second time interval T of interior setting2Described in interior driving
OLED pixel reaches the acquiescence grayscale value；
Wherein described second driving current I2More than the first driving current I1And the second time interval T2Less than described
One time interval T1。
4. the driving method of OLED pixel as claimed in claim 3, which is characterized in that by the second driving current I2It is set as institute
State the first driving current I12 times, while will be in each first time interval T1Interior the second time interval T2It adjusts
Whole is the first time interval T11/3.
5. the driving method of OLED pixel as claimed in claim 3, which is characterized in that by the second driving current I2It is set as institute
State the first driving current I13 times, while will be in each first time interval T1Interior the second time interval T2It adjusts
Whole is the first time interval T11/2.
6. a kind of organic LED display device, which is characterized in that luminescence display is used as any one in claim 1-5
The driving method of the item OLED pixel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410425977.8A CN105448233B (en) | 2014-08-26 | 2014-08-26 | The driving method and organic LED display device of OLED pixel |
| TW104113428A TWI584257B (en) | 2014-08-26 | 2015-04-27 | Organic light emitting diode display device and oled pixel driving method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410425977.8A CN105448233B (en) | 2014-08-26 | 2014-08-26 | The driving method and organic LED display device of OLED pixel |
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| CN105448233A CN105448233A (en) | 2016-03-30 |
| CN105448233B true CN105448233B (en) | 2018-06-26 |
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| CN112767872A (en) * | 2019-11-01 | 2021-05-07 | 京东方科技集团股份有限公司 | Pixel driving chip, driving method thereof and display device |
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| KR20030095954A (en) * | 2001-04-26 | 2003-12-24 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | Display device |
| JP2005157203A (en) * | 2003-11-28 | 2005-06-16 | Tohoku Pioneer Corp | Driving device and method of light emitting display panel |
| KR20070036066A (en) * | 2004-06-22 | 2007-04-02 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | Driving to reduce aging in an active matrix led display |
| JP2007178837A (en) * | 2005-12-28 | 2007-07-12 | Matsushita Electric Ind Co Ltd | Organic el display apparatus |
| KR100784036B1 (en) * | 2006-06-08 | 2007-12-10 | 삼성에스디아이 주식회사 | Organic electro luminescence display and driving method thereof |
| CN101500361B (en) * | 2009-03-03 | 2012-07-04 | 友达光电股份有限公司 | LED driving apparatus and driving method thereof |
| KR101289651B1 (en) * | 2010-12-08 | 2013-07-25 | 엘지디스플레이 주식회사 | Liquid crystal display and scanning back light driving method thereof |
| KR101476880B1 (en) * | 2011-09-29 | 2014-12-29 | 엘지디스플레이 주식회사 | Organic light emitting diode display device |
| CN102708798B (en) * | 2012-04-28 | 2015-05-13 | 京东方科技集团股份有限公司 | Pixel unit driving circuit, driving method, pixel unit and display device |
| KR101943417B1 (en) * | 2012-06-11 | 2019-04-17 | 삼성전자주식회사 | Apparatus and Method for Displaying Image, Apparatus and Method for Driving Light Emitting Device |
| CN102800281B (en) * | 2012-08-14 | 2015-07-15 | 昆山工研院新型平板显示技术中心有限公司 | Drive method and drive device for optimizing power dissipation of AMOLED panel |
| CN102842297B (en) * | 2012-08-31 | 2015-09-09 | 京东方科技集团股份有限公司 | Control the method for GTG, GTG control device and liquid crystal display |
| CN102984860B (en) * | 2012-11-21 | 2014-12-31 | 深圳市华星光电技术有限公司 | Light emitting diode (LED) dimming drive module, backlight module and liquid crystal display device |
| CN103218969B (en) * | 2013-03-12 | 2015-06-10 | 惠州雷曼光电科技有限公司 | Image displaying method, driving device and displaying system |
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| TWI584257B (en) | 2017-05-21 |
| CN105448233A (en) | 2016-03-30 |
| TW201608553A (en) | 2016-03-01 |
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Address after: 201506, building two, building 100, 1, Jinshan Industrial Road, 208, Shanghai, Jinshan District Patentee after: Shanghai Hehui optoelectronic Co., Ltd Address before: 201506, building two, building 100, 1, Jinshan Industrial Road, 208, Shanghai, Jinshan District Patentee before: EverDisplay Optronics (Shanghai) Ltd. |