CN103927976B - Organic light emitting diode pixel-driving circuit and organic light emitting diode display - Google Patents
Organic light emitting diode pixel-driving circuit and organic light emitting diode display Download PDFInfo
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- CN103927976B CN103927976B CN201310752924.2A CN201310752924A CN103927976B CN 103927976 B CN103927976 B CN 103927976B CN 201310752924 A CN201310752924 A CN 201310752924A CN 103927976 B CN103927976 B CN 103927976B
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Abstract
The invention discloses a kind of organic light emitting diode pixel-driving circuit, including: the grid of the first transistor receives scanning signal, first electrode connects data signal line, and the second electrode connects the first pole plate of the first electric capacity, the first pole plate of the second electric capacity and drives the grid of transistor；The grid of transistor seconds receives LED control signal, and the first electrode connects driving the second electrode of transistor, the second pole plate of the second electric capacity and the second electrode of third transistor, and the second electrode connects the positive pole of Organic Light Emitting Diode；The grid of third transistor receives initializing signal, and the second electrode connects driving the second electrode of transistor, the first electrode of transistor seconds and the second pole plate of the second electric capacity, and the first electrode receives reference voltage；The first electrode driving transistor connects the first power supply；The negative pole of Organic Light Emitting Diode connects second source, and connects the second pole plate of the first electric capacity.The present invention can stabilized driving pipe source voltage, improve OLED screen curtain brightness.
Description
Technical field
The present invention relates to display technology field, particularly relate to organic light emitting diode pixel-driving circuit and have
Machine light emitting diode indicator.
Background technology
OLED display screen visible angle is big, and can notable saves energy, therefore OLED shows
Device is increasingly widely applied.
OLED(Organic Light Emitting Diode (Organic Light-Emitting Diode) is coated with by ultrathin organic materials
Layer and glass substrate form, and when there being electric current to pass through OLED, coating of organic material therein will be luminous,
So that OLED display screen is luminous.
Summary of the invention
On the one hand, embodiments provide a kind of organic light emitting diode pixel-driving circuit, be used for driving
Dynamic described Organic Light Emitting Diode, including: the first electric capacity, the second electric capacity, the first transistor, the second crystal
Pipe, third transistor and driving transistor；
The grid of described the first transistor receives scanning signal, and the first electrode connects data signal line, the second electricity
Pole connects the first pole plate of described first electric capacity, the first pole plate of described second electric capacity and described driving transistor
Grid；
The grid of described transistor seconds receives LED control signal, and the first electrode connects described driving transistor
The second electrode, the second pole plate of described second electric capacity and the second electrode of described third transistor, second electricity
Pole connects the positive pole of described Organic Light Emitting Diode；
The grid of described third transistor receives initializing signal, and the second electrode connects described driving transistor
Second electrode, the first electrode of described transistor seconds and the second pole plate of described second electric capacity, the first electrode
Receive reference voltage；
First electrode of described driving transistor connects the first power supply；
The negative pole of described Organic Light Emitting Diode connects second source, and connects the second pole of described first electric capacity
Plate；
Wherein, described first supply voltage is more than described second source voltage.
On the other hand, the embodiment of the present invention additionally provides a kind of organic light emitting diode display, including scanning
Line, data wire and Organic Light Emitting Diode, also include above-mentioned organic light emitting diode pixel-driving circuit.
A kind of organic light emitting diode pixel-driving circuit of embodiment of the present invention offer and Organic Light Emitting Diode
Display, has the advantages that
Can compensate for OLED impedance, Simultaneous Stabilization drives pipe source voltage, improves Organic Light Emitting Diode screen
The brightness of curtain.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be only embodiments of the invention, for those of ordinary skill in the art, do not paying wound
On the premise of the property made work, it is also possible to obtain other accompanying drawing according to the accompanying drawing provided.
Fig. 1 implements a kind of organic light emitting diode pixel-driving circuit figure provided for the present invention；
Fig. 2 is a kind of organic light emitting diode pixel-driving circuit signal schematic representation；
Fig. 3 implements the initial phase organic light emitting diode pixel-driving circuit figure provided for the present invention；
Fig. 4 implements the input phase organic light emitting diode pixel-driving circuit figure provided for the present invention；
Fig. 5 implements the glow phase organic light emitting diode pixel-driving circuit figure provided for the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of the present invention rather than complete
The embodiment in portion.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creativeness
The every other embodiment obtained under work premise, broadly falls into the scope of protection of the invention.
At present, owing to, under the effect of aging effect, OLED direct impedance increases, luminous power declines, and leads
Cause the luminance-reduction of OLED display.
In view of this, a kind of organic light emitting diode pixel-driving circuit and organic is embodiments provided
Light emitting diode indicator, to solve the increase of OLED direct impedance, luminous power declines, causes OLED
The luminance-reduction of display, and during signal input, drive the technical problem of tube source grade voltage instability.
Fig. 1 illustrates a kind of organic light emitting diode pixel-driving circuit figure.
The embodiment of the invention discloses a kind of organic light emitting diode pixel-driving circuit, be used for driving organic
Optical diode D1, to overcome hesitation OLED direct impedance to increase, luminous power declines, and causes OLED to show
Show the technical problem of the luminance-reduction of device.This circuit includes: the first electric capacity C1, the second electric capacity C2, the first crystalline substance
Body pipe M1, transistor seconds M2, third transistor M3 and driving transistor M0；
The grid of the first transistor M1 receives scanning signal Scan, and the first electrode connects data signal line Data,
Second electrode connects first pole plate of the first electric capacity C1, first pole plate of the second electric capacity C2 and drives transistor
The grid of M0；
The grid of transistor seconds M2 receives LED control signal Emit, and the first electrode connects driving transistor
Second electrode of M0, second pole plate of the second electric capacity C2 and the second electrode of third transistor M3, second
Electrode connects the positive pole of Organic Light Emitting Diode D1；
The grid of third transistor M3 receives initializing signal Init, and the second electrode connects driving transistor M0
The second electrode, first electrode of transistor seconds M2 and second pole plate of the second electric capacity C2, the first electrode
Receive reference voltage VRef；
The first electrode driving transistor M0 connects the first power supply PVDD；
The negative pole of Organic Light Emitting Diode D1 connects second source PVEE, and connects the of the first electric capacity C1
Two pole plates；Wherein, the first power supply PVDD voltage is more than second source PVEE voltage.
Needing to illustrate, each transistor includes: grid, source electrode and drain electrode.Above-mentioned first electrode
For drain electrode, the second electrode is source electrode.
The first transistor M1, transistor seconds M2, third transistor M3 and driving transistor M0 are N
Type TFT(Thin Film Transistor, TFT).
A kind of organic light emitting diode pixel-driving circuit disclosed in the embodiment of the present invention is driven to include three below
The sequential stage: initial phase, input phase and glow phase.Fig. 2 is a kind of organic light emitting diode picture
Element drive circuit signal schematic representation, as in figure 2 it is shown, at initial phase 21, scanning signal Scan is low electricity
Flat, initializing signal Init is high level, and LED control signal Emit is low level；At input phase 22,
Scanning signal Scan is high level, and initializing signal Init is high level, and LED control signal Emit is low electricity
Flat；In glow phase 23, scanning signal Scan is low level, and initializing signal Init is low level, luminous
Control signal Emit is high level.
At initial phase 21, concrete, refer to Fig. 2, Fig. 3, wherein, Fig. 3 is that initial phase has
Machine Light-Emitting Diode pixel-driving circuit figure.
At initial phase 21, scanning signal Scan is low level, and initializing signal Init is high level, sends out
Optical control signal Emit is low level.
As it is shown on figure 3, drive the first pole plate and the second electricity that the grid of transistor M0 connects the first electric capacity C1
Holding first pole plate of C2, the first electrode connects the first power supply PVDD, and the second electrode connects third transistor
Second electrode of M3；
The grid of third transistor M3 receives initializing signal Init, and the second electrode connects driving transistor M0
The second electrode and second pole plate of the second electric capacity C2, first electrode receive reference voltage VRef.
At input phase 22, concrete, refer to Fig. 2, Fig. 4, wherein, Fig. 4 is organic of input phase
Light diode pixel-driving circuit figure.
At input phase, scanning signal Scan is high level, and initializing signal Init is high level, luminous control
Signal Emit processed is low level.
As shown in Figure 4, the grid of the first transistor M1 receives scanning signal Scan, and the first electrode connects number
According to holding wire Data, the second electrode connects first pole plate of the first electric capacity C1, first pole of the second electric capacity C2
Plate and the grid of driving transistor M0；
The grid of third transistor M3 receives initializing signal Init, and the first electrode receives reference voltage VRef,
Second electrode connects the second electrode and second pole plate of the second electric capacity C2 driving transistor M0；
The first electrode driving transistor M0 receives the first power supply PVDD signal；
Second pole plate of the first electric capacity C1 receives second source PVEE signal.
In glow phase 23, concrete, refer to Fig. 2, Fig. 4, wherein, Fig. 5 is organic of glow phase
Light diode pixel-driving circuit figure.
In glow phase, scanning signal Scan is low level, and initializing signal Init is low level, luminous control
Signal Emit processed is high level.
As it is shown in figure 5, in glow phase, the grid of transistor seconds M3 receives LED control signal Emit,
The positive pole of the second electrode connecting luminous diode, the first electrode connects the second pole plate and the driving of the second electric capacity C2
Second electrode of transistor M0；
The grid driving transistor M0 connects first electrode of the first electric capacity C1, and the first electrode receives the first electricity
Source PVDD signal；
The negative pole of light emitting diode receives second source PVEE signal, and connects second pole of the first electric capacity C1
Plate.
In the prior art, when organic light emitting diode is aging, when impedance increases, drive transistor source is the most electric
Pressure increases therewith, causes driving pipe source-drain current unstable, then affects the brightness of OLED screen curtain.
By organic light emitting diode pixel-driving circuit a kind of disclosed in the embodiment of the present invention, work as organic light emission
Diode is aging, when impedance increases, when drive transistor source pole tension increases therewith, by inputting at signal
Time, introduce a fixing reference voltage at source electrode so that drive source voltage and the grid voltage of transistor
Difference maintain steady statue so that the brightness stability of OLED screen curtain, and signal input time, drive pipe
Source voltage is stable.
The embodiment of the invention also discloses a kind of organic light emitting diode display, including scan line, data wire
And light emitting diode, also include above-mentioned organic light emitting diode pixel-driving circuit.
Obviously, it will be understood by those skilled in the art that in any case, source electrode can exchange with drain electrode,
In the present embodiment, described first electrode is drain electrode, and described second electrode is source electrode, it is also possible to for described
First electrode is source electrode, and described second electrode is drain electrode.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for people in the art
For Yuan, the present invention can have various change and change.All made within spirit and principles of the present invention
Any modification, equivalent substitution and improvement etc., should be included within the scope of the present invention.
Claims (8)
1. an organic light-emitting diode pixel drive circuit, is used for driving described Organic Light Emitting Diode, its
It is characterised by, including: the first electric capacity, the second electric capacity, the first transistor, transistor seconds, the 3rd crystal
Pipe and driving transistor；
The grid of described the first transistor receives scanning signal, and the first electrode connects data signal line, the second electricity
Pole connects the first pole plate of described first electric capacity, the first pole plate of described second electric capacity and described driving transistor
Grid；
The grid of described transistor seconds receives LED control signal, and the first electrode connects described driving transistor
The second electrode, the second pole plate of described second electric capacity and the second electrode of described third transistor, second electricity
Pole connects the positive pole of described Organic Light Emitting Diode；
The grid of described third transistor receives initializing signal, and the second electrode connects described driving transistor
Second electrode, the first electrode of described transistor seconds and the second pole plate of described second electric capacity, the first electrode
Receive reference voltage；
First electrode of described driving transistor connects the first power supply；
The negative pole of described Organic Light Emitting Diode connects second source, and connects the second pole of described first electric capacity
Plate；
Wherein, described first supply voltage is more than described second source voltage.
Organic light-emitting diode pixel drive circuit the most according to claim 1, it is characterised in that institute
Stating the first electrode is drain electrode, and described second electrode is source electrode.
Organic light-emitting diode pixel drive circuit the most according to claim 2, it is characterised in that institute
Stating the first transistor, described transistor seconds, described third transistor and described driving transistor is N-type
TFT。
Organic light-emitting diode pixel drive circuit the most according to claim 3, it is characterised in that institute
The driver' s timing stating organic light-emitting diode pixel drive circuit includes initial phase, input phase and luminescence
Stage.
Organic light-emitting diode pixel drive circuit the most according to claim 4, it is characterised in that described
Initial phase, described scanning signal is low level, and described initializing signal is high level, described luminous control
Signal processed is low level；
The grid of described driving transistor connects the of the first pole plate of described first electric capacity and described second electric capacity
One pole plate, the first electrode connects the first power supply, and the second electrode connects the second electrode of described third transistor；
The grid of described third transistor receives described initializing signal, and the first electrode connects described driving crystal
The source electrode of pipe and the second pole plate of described second electric capacity.
Organic light-emitting diode pixel drive circuit the most according to claim 4, it is characterised in that described
Input phase, described scanning signal is high level, and described initializing signal is high level, described light emitting control
Signal is low level；
The grid of described the first transistor receives described scanning signal, and the first electrode connects data signal line, the
It is brilliant that two electrodes connect the first pole plate of described first electric capacity, the first pole plate of described second electric capacity and described driving
The grid of body pipe；
The grid of described third transistor receives described initializing signal, and the first electrode receives described reference voltage,
Second electrode connects the second electrode and second pole plate of described second electric capacity of described driving transistor；
First electrode of described driving transistor connects described first power supply；
Second pole plate of described first electric capacity connects second source.
Organic light-emitting diode pixel drive circuit the most according to claim 4, it is characterised in that described
Glow phase, described scanning signal is low level, and described initializing signal is low level, described light emitting control
Signal is high level；
The grid of described third transistor receives described initializing signal, and the first electrode connects described light-emitting diodes
The positive pole of pipe, the second electrode connects the second pole plate of described second electric capacity and the second electricity of described driving transistor
Pole；
The grid of described driving transistor connects the first pole plate of described first electric capacity, and the first electrode receives first
Power supply signal；
The negative pole of described light emitting diode receives second source signal, and connects the second pole of described first electric capacity
Plate.
8. an organic light emitting diode display, it is characterised in that include scan line, data wire and organic
Light emitting diode, also includes that the organic light-emitting diode pixel as described in claim 1-7 any one drives
Circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310752924.2A CN103927976B (en) | 2013-12-31 | 2013-12-31 | Organic light emitting diode pixel-driving circuit and organic light emitting diode display |
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| CN201310752924.2A CN103927976B (en) | 2013-12-31 | 2013-12-31 | Organic light emitting diode pixel-driving circuit and organic light emitting diode display |
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| CN103927976B true CN103927976B (en) | 2017-01-04 |
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| CN110047431A (en) * | 2019-04-29 | 2019-07-23 | 云谷（固安）科技有限公司 | Pixel-driving circuit and its driving method |
| CN111383600B (en) | 2020-04-28 | 2022-04-19 | 厦门天马微电子有限公司 | Pixel driving circuit, driving method, display panel and display device |
| CN112309319A (en) * | 2020-11-05 | 2021-02-02 | 重庆惠科金渝光电科技有限公司 | Display panel drive circuit and display device |
| CN113611247B (en) * | 2021-08-04 | 2022-12-02 | 京东方科技集团股份有限公司 | Display substrate and display panel |
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| CN102842277B (en) * | 2011-06-22 | 2015-05-20 | 群创光电股份有限公司 | Displaying device with compensation function |
| TWI460704B (en) * | 2012-03-21 | 2014-11-11 | Innocom Tech Shenzhen Co Ltd | Display and driving method thereof |
| CN103198794B (en) * | 2013-03-29 | 2015-12-02 | 京东方科技集团股份有限公司 | Image element circuit and driving method, organic electroluminescence display panel and display device |
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