CN103985351B - A kind of pixel-driving circuit and driving method, display floater - Google Patents
A kind of pixel-driving circuit and driving method, display floater Download PDFInfo
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- CN103985351B CN103985351B CN201410193937.5A CN201410193937A CN103985351B CN 103985351 B CN103985351 B CN 103985351B CN 201410193937 A CN201410193937 A CN 201410193937A CN 103985351 B CN103985351 B CN 103985351B
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- 238000000034 method Methods 0.000 title claims description 15
- 230000005611 electricity Effects 0.000 claims description 19
- 239000013078 crystal Substances 0.000 claims description 14
- 238000007600 charging Methods 0.000 claims description 6
- 230000005669 field effect Effects 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 4
- 229920001621 AMOLED Polymers 0.000 abstract description 32
- 238000010586 diagram Methods 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
The present invention constructs a kind of pixel-driving circuit, it comprises the first transistor, transistor seconds, third transistor, 4th transistor, first electric capacity, second electric capacity and Organic Light Emitting Diode, the grid of the first transistor connects scan line, the drain electrode of the first transistor connects data wire, the source class of the first transistor connects one end of the first electric capacity, the other end of the first electric capacity connects the grid of transistor seconds, the drain electrode of transistor seconds connects the negative electrode of Organic Light Emitting Diode, the anode of Organic Light Emitting Diode is used for connecting power line, the source electrode of transistor seconds connects drain electrode and the drain electrode of the 4th transistor of third transistor respectively, the source electrode of third transistor connects the grid of transistor seconds, the grid of third transistor and the grid of the 4th transistor are used for receiving compensation and control voltage, the source ground of the 4th transistor.The embodiment of the present invention can compensate for the drift of the threshold voltage of AMOLED, and then improves Organic Light Emitting Diode GTG and the homogeneity of picture.
Description
Technical field
The present invention relates to organic light emitting display technical field, in particular it relates to one
Plant pixel-driving circuit and driving method, display floater.
Background technology
At active matrix Organic Light Emitting Diode (Active Matrix Organic
Type Light Emitting Diode, AMOLED) in display floater, many effects
The uniformity that should cause panel is deteriorated.Because AMOLED display floater
Brightness is directly proportional to the electric current of Organic Light Emitting Diode, and the level of electric current can affect
The display uniformity of AMOLED display floater, to by inhomogeneities control
In the range of about ± 1%, need the electric current control of AMOLED display floater
System is in the range of ± 1%.Owing to most integrated circuit the most only transmits voltage
Signal rather than current signal, so in AMOLED display floater,
The brightness of pixel to be controlled is difficult ± 1%, and voltage signal need to be changed by it
Become current signal, then transformation result was stored in pixel within a frame period.
It is true that due to AMOLED display floater transistor threshold voltage and
Mobility can offset over time, and these shortcomings can cause display floater brightness
Inhomogeneities.
Fig. 1 is the pixel-driving circuit figure of traditional AMOLED display floater.
The pixel-driving circuit 10 of AMOLED display floater mainly comprises first crystal
Pipe (TFT1) 102, transistor seconds (TFT2) 104, control electric capacity (C) 106,
Scan line (Gate n) 108 and data wire (Data n) 110.As it is shown in figure 1, pass
The pixel-driving circuit 10 of the AMOLED display floater of system does not comprise
Compensate circuit, if the assembly of AMOLED display floater morphs, drive
Galvanic electricity pressure and carrier mobility can together with change, and AMOLED display floater
Pixel-driving circuit 10 and the change of carrier mobility cannot be compensated.
Therefore, as it has been described above, there is a kind of demand, a kind of AMOLED of design
The compensation circuit of the pixel-driving circuit of display floater, makes display screen luminosity
Uniformity and stability control in permissible scope.
Summary of the invention
The pixel that it is an object of the present invention to design a kind of AMOLED is driven
Galvanic electricity road, makes the electric current flowing through Organic Light Emitting Diode unrelated with threshold voltage,
And then improve uniformity and the stability of display floater brightness.
For solving above-mentioned technical problem, the present invention constructs a kind of pixel driver electricity
Road, described pixel-driving circuit comprise the first transistor, transistor seconds,
Three transistors, the first electric capacity, the second electric capacity and Organic Light Emitting Diode, described
The first transistor is the switch of described scan line, and described transistor seconds is described
The driving switch of Organic Light Emitting Diode, described first electric capacity is used for storing described
The data signal gray scale voltage of data line transfer, and then control described second crystal
The pipe driving electric current to described Organic Light Emitting Diode, described compensation circuit comprises:
Third transistor, its source electrode connects described first electric capacity and described second electric capacity,
Drain electrode connects the source electrode of described transistor seconds；4th transistor, its source electrode connects
Ground, drain electrode connects the described source electrode of described transistor seconds and described 3rd crystal
The drain electrode of pipe, and the grid of described third transistor and described 4th transistor
Grid is used for receiving compensation and controls voltage.
In an embodiment of the present invention, described third transistor is N-channel field effect
Answering transistor, described 4th transistor is P-channel field-effect transistor (PEFT) transistor.
Further object is that a kind of active matrix of design is organic
The compensation method of the pixel-driving circuit of LED display panel, makes display
The uniformity of panel luminosity and stability control in permissible scope.
For solving above-mentioned technical problem, the present invention constructs a kind of pixel driver electricity
The driving method on road, it comprises: turn off described the first transistor, and conducting is described
Third transistor, turns off described 4th transistor, compensates described transistor seconds
Threshold voltage；Turn on described the first transistor, turn off described third transistor,
Turn on described 4th transistor, for described first electric capacity charging；Turn off described
One transistor and third transistor, turn on described transistor seconds, the 4th crystal
Pipe and Organic Light Emitting Diode, make described organic light-emitting diode.
In an embodiment of the present invention, turn off described the first transistor, turn on institute
State third transistor, turn off described 4th transistor, compensate described second crystal
The threshold voltage of pipe specifically includes: input low voltage level extremely described scan line,
Making the described control voltage that compensates is high-voltage level, to turn off described first crystal
Pipe, turns on described third transistor, turns off described 4th transistor, compensates institute
State the threshold voltage of transistor seconds.
In an embodiment of the present invention, turn on described the first transistor, turn off institute
State third transistor, turn on described 4th transistor, fill for described first electric capacity
Electricity specifically includes: high input voltage level to described scan line, high input voltage
Level is to described data wire, and making the described control voltage that compensates is low voltage level,
To turn on described the first transistor, turning off described third transistor, conducting is described
4th transistor, for described first electric capacity charging.
In an embodiment of the present invention, described the first transistor and trimorphism is turned off
Body pipe, turns on described transistor seconds, the 4th transistor and organic light-emitting diodes
Pipe, makes described organic light-emitting diode specifically include: input low-voltage electricity
Put down to described scan line, high input voltage level to described power line, make described
Compensate that to control voltage be low voltage level, to turn off described the first transistor and the
Three transistors, turn on described transistor seconds, the 4th transistor and organic light emission
Diode, makes described organic light-emitting diode.
For solving above-mentioned technical problem, the present invention constructs a kind of display floater,
Comprise above-mentioned pixel-driving circuit.
In an embodiment of the present invention, described pixel-driving circuit is formed at array
On substrate, described array base palte is provided with a plurality of data lines and gate line, institute
State a plurality of data lines and gate line defines multiple described pixel-driving circuit；Institute
State array base palte and also include driving chip, be used for as described data wire, gate line
Control voltage offer clock signal with compensating, provide power supply letter for described power line
Number.
In an embodiment of the present invention, described display floater is that active matrix has
Machine LED display panel.
In an embodiment of the present invention, the brightness of described display floater is by flowing through
The electric current stating Organic Light Emitting Diode determines.
The invention has the beneficial effects as follows: from a kind of AMOLED display surface of design
In the driving design of plate, compensate for the drift of the threshold voltage of AMOLED,
And then improve Organic Light Emitting Diode GTG and the homogeneity of picture.
For the foregoing of the present invention can be become apparent, cited below particularly preferably
Embodiment, and coordinate institute's accompanying drawings, it is described in detail below:
Accompanying drawing explanation
Fig. 1 shows the pixel-driving circuit of tradition AMOLED display floater
Circuit diagram；
Fig. 2 shows the pixel of the AMOLED display floater of the embodiment of the present invention
The circuit diagram of drive circuit；
Fig. 3 is that the pixel of the AMOLED display floater of the embodiment of the present invention is driven
The sequential chart on galvanic electricity road；
The conducting signal of the pixel-driving circuit of Fig. 4 A～Fig. 4 C display present invention
Figure；
Fig. 5 shows the pixel driver electricity of the AMOLED display floater of the present invention
The flow chart compensating driving method on road.
Detailed description of the invention
The explanation of following embodiment is graphic with reference to add, in order to illustrate this
Invention may be used to the specific embodiment implemented.The direction term that the present invention is previously mentioned,
Such as " on ", D score, "front", "rear", "left", "right", " interior ", " outward ",
" side " etc., are only the directions with reference to annexed drawings.Therefore, the side of use
It is to illustrate and understand the present invention to term, and is not used to limit the present invention.
In the drawings, the unit that structure is similar is to represent with identical label.
Fig. 2 shows the pixel of the AMOLED display floater of the embodiment of the present invention
Drive circuit figure.Pixel-driving circuit is formed on array base palte, array base palte
On be provided with a plurality of data lines and gate line, a plurality of data lines and a plurality of gate line
Define multiple pixel-driving circuit.It addition, array base palte also includes driving core
Sheet, provides clock signal for controlling voltage for data wire, gate line and compensation,
Power supply signal is provided for power line.As in figure 2 it is shown, the AMOLED of the present invention
The pixel-driving circuit 20 of display floater is 4T2C (four transistor (Thin
Film Transistor, TFT) and two electric capacity) circuit, it mainly comprises
One transistor (TFT1) 202, transistor seconds (TFT2) the 204, first electric capacity
(C1) the 206, second electric capacity (C2) 207, scan line (Gate Line) 208, data
Line (Data Line) 210, Organic Light Emitting Diode (OLED) 212 and compensation electricity
Road 214.The first transistor 202 is the switch of scan line 208, first crystal
The grid of pipe 202 connects scan line 208, and drain electrode connects data wire 210, and
Source electrode connects one end of the first electric capacity 206.Transistor seconds 204 is organic
The driving switch of optical diode 212, the drain electrode of transistor seconds 204 is connected to
The negative electrode of Organic Light Emitting Diode 212, and its grid is connected to the first electric capacity
The other end of 206.The anode of Organic Light Emitting Diode 212 connects power line.
First electric capacity 206 is for storing the data signal GTG electricity of data wire 210 transmission
Pressure, and then control transistor seconds 204 driving Organic Light Emitting Diode 212
Streaming current.Scan line 208 is used for transmitting scanning signal to transistor, controls the
The open and close of one transistor 202.Data wire 210 is used for transmitting data letter
Number give transistor seconds 204.And compensate circuit 214 and comprise third transistor
2142 and the 4th transistor 2144, the source electrode of transistor seconds 204 connects respectively
Connect third transistor 2142 and the drain electrode of the 4th transistor 2144.3rd crystal
The source electrode of pipe 2142 connects the drain electrode of transistor seconds 204, third transistor
The grid of 2142 connects the grid of the 4th transistor 2144 and controls to receive to compensate
Voltage Ctl n, the source ground of the 4th transistor 2144.By compensating control
Voltage Ctl n control third transistor 2142 is opened with the 4th transistor 2144
Open and close, allow and flow through electric current and second crystal of Organic Light Emitting Diode 212
The threshold voltage vt h of pipe 204 is unrelated, reaches to improve AMOLED display surface
The brightness problem of plate, the uniformity of display floater can effectively promote.It addition,
At this it should be noted that in this embodiment, the first transistor 202,
Two-transistor 204 and third transistor 2142 are N-channel field-effect transistor
(NMOS) transistor, and the 4th transistor 2144 is P-channel field-effect transistor (PEFT) crystal
Pipe (PMOS) transistor, but in different embodiments, it is also possible to will implement
Nmos pass transistor in example changes PMOS transistor into, and PMOS crystal
Pipe changes nmos pass transistor into, does not limit at this.
Fig. 3 is that the pixel of the AMOLED display floater of the embodiment of the present invention is driven
The sequential chart on galvanic electricity road.As it is shown on figure 3, on first stage t1, this time rank
Section is also called the compensated stage of threshold voltage vt h, and input low voltage level is to sweeping
Retouch line 208, and compensating control voltage Ctl n is high-voltage level, to turn off
The first transistor 204, turns on third transistor 214, turns off the 4th transistor
2144, now the grid voltage of transistor seconds 204 is threshold voltage vt h,
Thus the threshold voltage vt h of transistor seconds 204 is can compensate at first stage t1,
As shown in Figure 4 A.In second stage t2, it is filling of the first electric capacity in this stage
During electricity.High input voltage level is to scan line 208, high input voltage level
To data wire 210, making compensation control voltage Ctl n is low voltage level, leads
Logical the first transistor 204, turns off third transistor 2142, turns on the 4th crystal
Pipe 2144.When the first transistor 202 is conducting state, data wire 210
Signal will be transferred to the grid of transistor seconds 204, and starts to be the first electricity
Hold 206 chargings, as shown in Figure 4 B.And the grid of now transistor seconds 204
Pole tension is (Vdd-Vdata) * C1/ (C1+C2)+Vth, and wherein Vdd is for driving
Voltage, Vdata is the signal voltage of data wire 210, transistor seconds 204
State for conducting.Current formula according to transistor:
I=1/2*Cx* (u*W/L) * (Vg-Vth)2, wherein, Cx is the grid oxygen of transistor
Layer unit-area capacitance, u is the electron mobility of transistor, and W is transistor
Width, L is the length of transistor, is appreciated that and flows through organic light-emitting diodes
The electric current of pipe 212 is
I=1/2*Cx* (u*W/L) * ((Vdd-Vdata) * C1/ (C1+C2))2, public by electric current
It is known that pass through electric current I and the threshold value of Organic Light Emitting Diode 212 in formula
Voltage Vth is unrelated.By third transistor 2142 and the 4th transistor 2144
Design, allow and flow through electric current I and the threshold voltage of Organic Light Emitting Diode 212
Vth is unrelated, and the uniformity making display floater luminosity is stable, will not be along with
The skew of threshold voltage and unstable.Then, at phase III t3, input low
Voltage level is to scan line 208, and high input voltage level is to power line, and mends
Repaying control voltage Ctl n is low voltage level, turns off the first transistor 204,
Turn off third transistor 2142, turn on the 4th transistor 2144, in this stage,
Organic Light Emitting Diode 212 in pixel-driving circuit 20 starts luminescence.Thoroughly
Cross above-mentioned driving method, improve the uniformity of display floater.
Fig. 5 shows the pixel driver electricity of the AMOLED display floater of the present invention
The flow chart of the compensation method on road.Following narration is to cooperate with the assembly symbol of Fig. 3
Number explain.The pixel-driving circuit 20 of this AMOLED comprises first equally
Transistor (TFT1) 202, transistor seconds the 204, first electric capacity (C1) 206,
Second electric capacity (C2) 207, scan line (Gate Line) 208, data wire (Data
210 Line), Organic Light Emitting Diode (Organic Light Emitting Diode,
OLED) 212 with compensate circuit 214.And compensating circuit 214, to comprise trimorphism
Body pipe 2142 and the 4th transistor 2144.As it is shown in figure 5, in step S502
In, turn off the first transistor 202, turn on third transistor 2142, turn off the
Four transistors 2144, compensate the threshold voltage of transistor seconds 204.These rank
Section is also called the threshold voltage compensation time.In this stage, input low voltage level
To scan line 208, making compensation control voltage is high-voltage level, the second crystal
The gate voltage values of pipe 204 is threshold voltage vt h.In step S504,
Conducting the first transistor 202, turns off third transistor 2142, and conducting the 4th is brilliant
Body pipe 2144, is that the first electric capacity 206 charges.High input voltage level is to sweeping
Retouching line 208, high input voltage level, to data wire 210, makes compensation control electricity
Pressure Ctl n is low voltage level, and therefore the signal of data wire 210 will transmit
To the grid of transistor seconds 204, and flow through Organic Light Emitting Diode 212
Electric current is I=1/2*Cx* (u*W/L) * ((Vdd-Vdata) * C1/ (C1+C2))2。
By above-mentioned current formula it is apparent that threshold value is not electric in formula
Pressure Vth, flows through the electric current I and threshold voltage vt h of Organic Light Emitting Diode 212
Unrelated.Through above-mentioned compensation driving method, at AMOLED display floater
Pixel-driving circuit 20 in, allow and flow through the electricity of Organic Light Emitting Diode 212
I is unrelated with threshold voltage vt h for stream, therefore flows through Organic Light Emitting Diode 212
Electric current I will not cause AMOLED because of the drift of threshold voltage vt h
Display floater luminosity is uneven.Then, in step S506, input
Low voltage level, makes to scan line 208, high input voltage level to power line
Compensating control voltage Ctl n is low voltage level, turns off the first transistor 204
With third transistor 2142, turn on transistor seconds the 207, the 4th transistor
2144 with Organic Light Emitting Diode 212.In this stage, make organic light-emitting diodes
Pipe 212 starts luminescence.Through above-mentioned driving method, improve display floater
The uniformity.
As it has been described above, through the pixel driver electricity at AMOLED display floater
Road adds third transistor and the 4th transistor, compensates the threshold of transistor seconds
Threshold voltage Vth, makes the electric current flowing through Organic Light Emitting Diode 212 electric with threshold value
Vth is unrelated for pressure.The invention have the benefit that from AMOLED display surface
In the driving design of plate, compensate for the drift of the threshold voltage of AMOLED,
Thus improve the homogeneity of Organic Light Emitting Diode GTG and picture.
In sum, although the present invention is disclosed above with preferred embodiment, but
Above preferred embodiment also is not used to limit the present invention, the ordinary skill of this area
Personnel, without departing from the spirit and scope of the present invention, all can make various change
With retouching, therefore protection scope of the present invention with claim define in the range of
Accurate.
Claims (10)
1. a pixel-driving circuit, it is characterised in that described pixel-driving circuit comprises first
Transistor, transistor seconds, third transistor, the 4th transistor, the first electric capacity,
Two electric capacity and Organic Light Emitting Diode, the grid of described the first transistor connects scan line, institute
The drain electrode stating the first transistor connects data wire, and the source class of described the first transistor connects described
One end of first electric capacity, the other end of described first electric capacity connects the grid of described transistor seconds
Pole, described transistor seconds drain electrode connect described Organic Light Emitting Diode negative electrode, described in have
The anode of machine light emitting diode is used for connecting power line, and the source electrode of described transistor seconds is respectively
Connect drain electrode and the drain electrode of described 4th transistor of described third transistor, the described 3rd
The source electrode of transistor connects the grid of described transistor seconds, the grid of described third transistor
The grid of pole and described 4th transistor is used for receiving same compensation and controls voltage, and described the
The source ground of four transistors；
The actuation step of wherein said pixel-driving circuit includes:
Turn off described the first transistor, turn on described third transistor, turn off the described 4th
Transistor, compensates the threshold voltage of described transistor seconds；
Turn on described the first transistor, turn off described third transistor, turn on the described 4th
Transistor, for described first electric capacity charging；
Turn off described the first transistor and third transistor, turn on described transistor seconds,
4th transistor and Organic Light Emitting Diode, makes described organic light-emitting diode；
Wherein, the described control voltage that compensates can be same when described third transistor being turned on
Time described 4th transistor is cut off, and when described third transistor is cut off, together
Time by described 4th transistor turns.
Pixel-driving circuit the most according to claim 1, it is characterised in that the described 3rd
Transistor is N-channel field-effect transistor, and described 4th transistor is P-channel field-effect transistor (PEFT)
Transistor.
3. a driving method for pixel-driving circuit as claimed in claim 1 or 2, it is special
Levying and be, described driving method comprises:
Turn off described the first transistor, turn on described third transistor, turn off the described 4th
Transistor, compensates the threshold voltage of described transistor seconds；
Turn on described the first transistor, turn off described third transistor, turn on the described 4th
Transistor, for described first electric capacity charging；
Turn off described the first transistor and third transistor, turn on described transistor seconds,
4th transistor and Organic Light Emitting Diode, makes described organic light-emitting diode.
Driving method the most according to claim 3, it is characterised in that described in described shutoff
The first transistor, turns on described third transistor, turns off described 4th transistor, compensates
The threshold voltage of described transistor seconds specifically includes:
Input low voltage level, to described scan line, makes described compensation control voltage for high electricity
Voltage level, to turn off described the first transistor, turns on described third transistor, turns off institute
State the 4th transistor, compensate the threshold voltage of described transistor seconds.
Driving method the most according to claim 4, it is characterised in that described in described conducting
The first transistor, turns off described third transistor, turns on described 4th transistor, for institute
State the first electric capacity charging to specifically include:
High input voltage level is to described scan line, high input voltage level to described data
Line, making the described control voltage that compensates is low voltage level, to turn on described first crystal
Pipe, turns off described third transistor, turns on described 4th transistor, for described first electricity
Capacity charge.
Driving method the most according to claim 5, it is characterised in that described in described shutoff
The first transistor and third transistor, turn on described transistor seconds, the 4th transistor and
Organic Light Emitting Diode, makes described organic light-emitting diode specifically include:
Input low voltage level is to described scan line, high input voltage level to described power supply
Line, making the described control voltage that compensates is low voltage level, to turn off described the first transistor
And third transistor, turn on described transistor seconds, the 4th transistor and organic light emission two
Pole is managed, and makes described organic light-emitting diode.
7. a display floater, it is characterised in that comprise according to any one of claim 1～2
Pixel-driving circuit.
Display floater the most according to claim 7, it is characterised in that described pixel driver
Circuit is formed on array base palte, and described array base palte is provided with a plurality of data lines and grid
Polar curve, described a plurality of data lines and gate line define multiple described pixel-driving circuit；
Described array base palte also includes driving chip, is used for as described data wire, gate line and benefit
Repay control voltage and clock signal is provided, provide power supply signal for described power line.
Display floater the most according to claim 7, it is characterised in that described display floater
For active matrix organic LED display panel.
Display floater the most according to claim 7, it is characterised in that described display surface
The brightness of plate is determined by the electric current flowing through described Organic Light Emitting Diode.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410193937.5A CN103985351B (en) | 2014-05-09 | A kind of pixel-driving circuit and driving method, display floater | |
| US14/384,475 US9626910B2 (en) | 2014-05-09 | 2014-05-13 | Pixel driver circuit, display panel and driving method for the pixel driver circuit |
| PCT/CN2014/077380 WO2015168954A1 (en) | 2014-05-09 | 2014-05-13 | Pixel drive circuit and drive method therefor and display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410193937.5A CN103985351B (en) | 2014-05-09 | A kind of pixel-driving circuit and driving method, display floater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103985351A CN103985351A (en) | 2014-08-13 |
| CN103985351B true CN103985351B (en) | 2016-11-30 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101996579A (en) * | 2010-10-26 | 2011-03-30 | 华南理工大学 | Pixel driving circuit and method of active organic electroluminescent display |
| CN202855271U (en) * | 2012-11-13 | 2013-04-03 | 京东方科技集团股份有限公司 | Pixel circuit and display apparatus |
| CN103077680A (en) * | 2013-01-10 | 2013-05-01 | 上海和辉光电有限公司 | Organic light-emitting diode (OLE) pixel driving circuit |
| CN103700338A (en) * | 2012-09-27 | 2014-04-02 | 乐金显示有限公司 | Pixel circuit and method for driving thereof, and organic light emitting display device using the same |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101996579A (en) * | 2010-10-26 | 2011-03-30 | 华南理工大学 | Pixel driving circuit and method of active organic electroluminescent display |
| CN103700338A (en) * | 2012-09-27 | 2014-04-02 | 乐金显示有限公司 | Pixel circuit and method for driving thereof, and organic light emitting display device using the same |
| CN202855271U (en) * | 2012-11-13 | 2013-04-03 | 京东方科技集团股份有限公司 | Pixel circuit and display apparatus |
| CN103077680A (en) * | 2013-01-10 | 2013-05-01 | 上海和辉光电有限公司 | Organic light-emitting diode (OLE) pixel driving circuit |
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