CN108320710B - Pixel circuit - Google Patents
Pixel circuit Download PDFInfo
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- CN108320710B CN108320710B CN201810105599.3A CN201810105599A CN108320710B CN 108320710 B CN108320710 B CN 108320710B CN 201810105599 A CN201810105599 A CN 201810105599A CN 108320710 B CN108320710 B CN 108320710B
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- 239000003990 capacitor Substances 0.000 claims abstract description 22
- 230000008878 coupling Effects 0.000 claims description 34
- 238000010168 coupling process Methods 0.000 claims description 34
- 238000005859 coupling reaction Methods 0.000 claims description 34
- 230000005611 electricity Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 10
- 101100102849 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) VTH1 gene Proteins 0.000 description 7
- 239000013078 crystal Substances 0.000 description 5
- 240000001439 Opuntia Species 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of El Displays (AREA)
Abstract
The invention discloses a pixel circuit which is provided with a light emitting diode, a first transistor, a capacitor, a compensation circuit, a second transistor and a third transistor. The second end of the first transistor is electrically coupled to the anode end of the light emitting diode. The first end of the capacitor is electrically coupled to the gate terminal of the first transistor. The compensation circuit is coupled between the second end of the first transistor and the gate terminal. The first terminal of the second transistor is used for receiving the first data voltage, and the second terminal of the second transistor is electrically coupled to the first terminal of the first transistor. The first terminal of the third transistor is used for receiving the second data voltage, and the second terminal of the third transistor is electrically coupled to the second terminal of the capacitor.
Description
Technical field
The present invention is about a kind of pixel circuit, espespecially a kind of pixel circuit with light emitting diode.
Background technique
In general, if operate organic LED panel in the environment of high brightness, in order to allow user can
See content shown by display organic LED panel, organic LED panel must be operated at high brightness
Mode.
However, the pixel circuit of existing organic LED panel only has a data line, to by organic light emission
Diode panel operates in high brightness mode, then can be by data needed for each pixel in increase organic LED panel
The data voltage of line, but such mode may be more than that integrated circuit (integrated circuit, IC) can be supported
Range；Either, can also be disappeared by operating voltage needed for increasing this IC, the power that will lead to organic LED panel
Consumption increases.
Summary of the invention
One embodiment of the invention discloses a kind of pixel circuit, includes light emitting diode, the first transistor, capacitor, compensation
Circuit, second transistor and third transistor.The anode tap of the second end electric property coupling light emitting diode of the first transistor.Electricity
The gate terminal of the first end electric property coupling the first transistor of appearance.Compensation circuit couple the first transistor second end and gate terminal it
Between.The first end of second transistor is to receive the first data voltage, the second end electric property coupling first crystal of second transistor
The first end of pipe.The first end of third transistor is to receive the second data voltage, the second end electric property coupling of third transistor
The second end of capacitor.
Detailed description of the invention
For the above and other purpose, feature, advantage and embodiment of the content of present invention can be clearer and more comprehensible, institute's accompanying drawings
Be described as follows:
Fig. 1 is the circuit diagram of the pixel circuit according to shown in one embodiment of the invention.
Fig. 2 is the timing according to the first control signal of pixel circuit shown in FIG. 1, second control signal and luminous signal
Figure.
Fig. 3 A to Fig. 3 C is the schematic diagram operated according to pixel circuit shown in FIG. 1 according to the timing diagram of Fig. 2.
Wherein, appended drawing reference:
100: pixel circuit
110: compensation circuit
A, B: node
C1: capacitor
DATA1, DATA2: data voltage
EM: luminous signal
I: electric current
OVDD, OVSS: voltage
S1, S2: control signal
T1~T9: transistor
VINT: initial voltage
D1, D2, D3: period
Specific embodiment
It is hereafter to elaborate for embodiment cooperation institute's accompanying drawings, to more fully understand the aspect of this case, but is provided
Embodiment be not the range that is covered to limit this case, and the non-sequence to limit its execution of the description of structure operation,
Any structure reconfigured by element, it is produced that there is equal and other effects device, it is all the range that this case is covered.
It is commonly the mistake of index value about " about " used herein, " about ", " substantially about " or " generally "
Within difference or range 20 about percent, preferably it is within about 10, and is more preferably then about within percentage five.Text
Without clearly stating in if, mentioned by numerical value all regard as approximation, i.e., such as " about ", " about ", " substantially about " or " substantially
On " represented by error or range.
About " coupling " used herein, it can generally refer to electric property coupling, be electrically connected, usually can refer to two or multiple
Element mutually directly makees entity or in electrical contact, and more preferably then also referring to element is directly to couple or be coupled indirectly.Wen Zhong
If without clearly stating, mentioned by coupling all regard as electric property coupling or be coupled indirectly.Fig. 1 is please referred to, for according to this hair
The circuit diagram of pixel circuit 100 shown in a bright embodiment with light emitting diode.
The light emitting diode has anode tap and cathode terminal, and the cathode terminal of light emitting diode is to receive voltage
OVSS.In some embodiments, light emitting diode can also be micro- light emitting diode (micro light-emitting
Diode, mLED) or Organic Light Emitting Diode (organic light-emitting diode, OLED), but not as
Limit, the light-emitting component driven by electric current, is all the range that this case is covered.A following embodiment will be with organic light-emitting diodes
Pipe OLED is illustrated with pixel circuit 100 composed by P-type transistor.
Pixel circuit 100 includes Organic Light Emitting Diode OLED, transistor T1, capacitor C1, compensation circuit 110, transistor
T2 and transistor T3.In some embodiments, pixel circuit 100 further includes transistor T4, transistor T5, transistor T6, crystal
Pipe T8 and transistor T9.
Transistor T1 has first end, second end and gate terminal A, the second end electric property coupling organic light emission two of transistor T1
The anode tap of pole pipe OLED, the first end of transistor T1 is to receive voltage OVDD, and for the present embodiment, voltage OVDD can be with
It is the constant voltage with opposing high voltage potentials level；And voltage OVSS can be the constant voltage with relative low voltage level.
Capacitor C1 has first end and second end, wherein the gate terminal of the first end electric property coupling transistor T1 of capacitor C1.
The gate terminal for indicating transistor T1 with node A below, the second end of capacitor C1 is indicated with node B.
Between the second end and gate terminal of 110 coupling transistors T1 of compensation circuit, to detect crystalline substance by compensation circuit 110
The critical voltage of body pipe T1.In some embodiments, compensation circuit 110 includes transistor T7, and transistor T7 has first end, the
Two ends and gate terminal, the second end of the first end electric property coupling transistor T1 of transistor T7, the second end electrical property coupling of transistor T7
The gate terminal of transistor T1 is connect, the gate terminal of transistor T7 is to receive control signal S2.
Transistor T2 has first end, second end and gate terminal, and the first end of transistor T2 is to receive data voltage
The first end of the second end electric property coupling transistor T1 of DATA1, transistor T2, the gate terminal of transistor T2 is to receive control letter
Number S2.The first end of transistor T2, which can be, to be electrically coupled to provide the data line (not shown) of data voltage DATA1.
Transistor T3 has first end, second end and gate terminal, and the first end of transistor T3 is to receive data voltage
The second end of the second end electric property coupling capacitor C1 of DATA2, transistor T3, the gate terminal of transistor T3 is to receive control signal
S2.The first end of transistor T3, which can be, to be electrically coupled to provide the data line (not shown) of data voltage DATA2.In another reality
It applies in example, pixel circuit 100 may include transistor T4, and transistor T4 has first end, second end and gate terminal, transistor T4's
First end is to receive voltage OVDD, the first end of the second end electric property coupling transistor T1 of transistor T4, the grid of transistor T4
Extremely to receive luminous signal EM.When transistor T4 conducting, the voltage level of the first end of transistor T1 can be maintained
The voltage level of OVDD；When transistor T4 is closed, it can avoid pixel circuit 100 to Organic Light Emitting Diode OLED and generate one
Leakage path, further the phenomenon that improved dark state light leakage.
In another embodiment, pixel circuit 100 may include transistor T5, transistor T5 have first end, second end and
Gate terminal, the second end of the first end electric property coupling transistor T1 of transistor T5, the second end electric property coupling of transistor T5 are organic
The anode tap of light emitting diode OLED, that is, transistor T5 is coupled between transistor T1 and Organic Light Emitting Diode OLED, it is brilliant
The gate terminal of body pipe T5 is to receive luminous signal EM, and when transistor T5 conducting, the driving current I of transistor T1 passes through crystal
Pipe T5 flows to Organic Light Emitting Diode OLED, when transistor T5 is closed, can avoid pixel circuit 100 to Organic Light Emitting Diode
OLED generates a leakage path, further the phenomenon that improved dark state light leakage.
In another embodiment, pixel circuit 100 may include transistor T6, transistor T6 have first end, second end and
The second end of gate terminal, the gate terminal of the first end electric property coupling transistor T1 of transistor T6, transistor T6 is initial to receive
The gate terminal of voltage VINT, transistor T6 are to receive control signal S1.Wherein control signal S1 and control signal S2 can be
The control signal of enable when different can also be the complementary signal of phase difference 180 degree, as long as transistor T2, T3, T7 and transistor
T6, T9 will not be simultaneously turned on, the range as of the invention covered.It is wherein control signal S1 during the enable of luminous signal EM
With control signal S2 forbidden energy during, that is, when control signal S1 or control signal S2 difference enable when, luminous signal institute
The transistor of control is in off state, and when the transistor T5 conducting of luminous signal control, driving current I can pass through transistor T5
Flow to Organic Light Emitting Diode OLED.Wherein initial voltage VINT can be the constant voltage with fixed voltage level, also
Can be has a fixed voltage level during transistor T6 conducting.
In another embodiment, pixel circuit 100 may include transistor T8, transistor T8 have first end, second end and
Gate terminal, the first end of transistor T8 are electrically coupled to node B, the second end of transistor T8 to receive initial voltage VINT,
The gate terminal of transistor T8 is to receive luminous signal EM.When transistor T8 conducting, node B is reset according to initial voltage VINT
Voltage level.Wherein initial voltage VINT can be the constant voltage with fixed voltage level, can also be in crystal
Pipe T8 has a fixed voltage level during being connected.
In another embodiment, pixel circuit 100 may include transistor T9, transistor T9 have first end, second end and
Gate terminal, the first end of transistor T9 are coupled to organic light emission two to receive initial voltage VINT, the second end of transistor T9
The anode tap of pole pipe OLED, the gate terminal of transistor T9 is to receive control signal S1.When transistor T6 is connected with transistor T9
When, the voltage level of the anode tap of Organic Light Emitting Diode OLED and the voltage level of node A can be reset respectively to initial voltage
VINT。
The above-mentioned second end of transistor T6, the second end of transistor T8, the first end of transistor T9 can be separately connected
To the pressure-wire (not shown) of initial voltage VINT is provided, there can be difference to draw to circuit according to actual needs according to the people of the field technology
The mode of layout, the present invention is not limited thereto.
In some embodiments, transistor T1~T9 can be with N-type metal-oxide half field effect transistor, p-type OH crystal
Pipe or combinations thereof is implemented.In some embodiments, transistor T1~T9 can be with N-type TFT (thin film
Transistor), P-type TFT or combinations thereof is implemented, and the present invention is not limited thereto, any transistor or semiconductor
Switch element can cover the scope of the present invention.
Again please with reference to Fig. 2 and Fig. 3 A to Fig. 3 B.Fig. 2 is the control signal according to pixel circuit 100 shown in FIG. 1
S1, the timing diagram for controlling signal S2 and luminous signal EM.Wherein, control signal S1 shown in Fig. 2, control signal S2 and the letter that shines
Number EM is to cooperate 100 transistor T1~T9 of pixel circuit in the embodiment of Fig. 1 to be the example of P-type transistor.Practical application
In, when transistor T1~T9 is N-type transistor, then control signal S1 shown in Fig. 2, control signal S2 and luminous signal EM need phase
Generating positive and negative voltage level should be adjusted, known to this people for existing skill, therefore is not repeated separately herein.Fig. 3 A to Fig. 3 C is according to Fig. 1
Shown in the schematic diagram that is operated according to the timing diagram of Fig. 2 of pixel circuit 100.
As shown in Figure 3A, Fig. 3 A is to be painted pixel circuit 100 when operating the first period D1, in pixel circuit 100
Each transistor turns or the schematic diagram of closing.
As shown in Fig. 2, can be closed after being applied high-voltage level VH according to the gate terminal of P-type transistor and P-type transistor
Gate terminal be applied the characteristic that can be connected after low voltage level VL, in the first period D1, the voltage level for controlling signal S1 is
Low voltage level VL, the voltage level for controlling signal S2 are high-voltage level VH and the voltage level of luminous signal EM is high
Voltage level VH, therefore transistor T2, T3, T4 in Fig. 3 A, T5, T7, T8 is closed (with the signal that crosses), and transistor T6,
T9 is switched on.
When transistor T2, T3, T4, T5, T7, T8 are in off state and transistor T6, T9 is on state, at this time along void
Line arrow can generate a leakage path, the voltage electricity of the anode tap of the voltage level and Organic Light Emitting Diode OLED of node A
It is flat to discharge along dotted arrow direction and be reset to initial voltage VINT.
As shown in Figure 3B, Fig. 3 B is to be painted pixel circuit 100 when operating the second period D2, in pixel circuit 100
Each transistor turns or the schematic diagram of closing.
In the second period D2, as shown in Fig. 2, the voltage level of control signal S1 is high-voltage level VH, control signal S2
Voltage level be low voltage level VL and the voltage level of luminous signal EM is high-voltage level VH.Therefore transistor T4,
T5, T6, T8, T9 are closed, and transistor T2, and T3, T7 are switched on.
It is closed based on transistor T4, T5, T6, T8, T9 and transistor T2, T3, T7 is switched on, data voltage DATA1 will
Sequentially pass through transistor T2, transistor T1 and transistor T7 along dotted arrow direction, and charge to node A, until node A's
Voltage level is charged to DATA1- from initial voltage VINT | VTH1 |, wherein VTH1 is the critical voltage of transistor T1, at this time
Transistor T1 will be closed.Data voltage DATA2 will pass through transistor T3 along the direction of the arrow, and charge to node B, Zhi Daojie
The voltage level of point B is charged to data voltage DATA2.
As shown in Figure 3 C, show pixel circuit 100 when third period D3 operation, it is each in pixel circuit 100
Transistor turns or the schematic diagram of closing.
In third period D3, as shown in Fig. 2, the voltage level of control signal S1 is high-voltage level VH, control signal S2
Voltage level be high-voltage level VH and the voltage level of luminous signal EM is low voltage level VL, therefore transistor T2,
T3, T6, T7, T9 are closed, and transistor T4, and T5, T8 are switched on.
It is closed based on transistor T2, T3, T6, T7, T9 and transistor T4, T5, T8 is switched on, the voltage level of node B
Initial voltage VINT will be discharged to from data voltage DATA2, therefore the voltage level variation of node B is initial voltage VINT
With the difference of data voltage DATA2, i.e. VINT-DATA2.
Further, since the first end of capacitor C1 is suspension joint (floating) in not received data signal DATA1, therefore work as
When node B has voltage level change, the voltage level of the first end of capacitor C1 will accordingly change.In addition, due to capacitor C1
First end be coupled to node A, therefore the voltage of the first end of capacitor C1 is that brigadier is identical as the voltage level of node A so that
When node B has voltage level change, the voltage level of node A will accordingly change.Specifically, due to the electricity of node B
Voltage level variable quantity is VINT-DATA2, therefore the voltage level of node A is due to the coupling effect at the both ends capacitor C1, when by second
DATA1- when section D2 | VTH1 | it is changing into DATA1- | VTH1 |+VINT-DATA2.Furthermore the voltage of the first end of transistor T1
Level also due to transistor T4 relationship switched on and be charged to voltage OVDD.
Therefore, the voltage level of node A is DATA1- | VTH1 |+VINT-DATA2, the voltage of the source terminal of transistor T1
Level is voltage OVDD.
Obtain transistor T1 gate terminal and source terminal voltage level and transistor T1 operate in saturation region it
Afterwards, the electric current for flowing through transistor T1 can be calculated by the current formula of the transistor of saturation region:
I=0.5k (VSG-VTH1)2
=0.5k (VS-VG-VTH1)2
=0.5k [OVDD- (DATA1- | VTH1 |+VINT-DATA2)-VTH1]2
=0.5k [OVDD+DATA2-DATA1-VINT]2
Wherein, k is conductivity constant, and I is the electric current for flowing through transistor T1, and VS is the voltage electricity of the first end of transistor T1
Flat, VG is the voltage level of the gate terminal of transistor T1, and VTH1 is the critical voltage of transistor T1.
Further, the electric current I for flowing through transistor T1 will drive Organic Light Emitting Diode OLED, so that organic light-emitting diodes
Pipe OLED issues the light of respective intensities according to the size of electric current.That is, passing through formula I=0.5k [OVDD+DATA2-
DATA1-VINT]2, and by adjustment data voltage DATA1 and data voltage DATA2, Organic Light Emitting Diode can be adjusted
The luminous intensity of OLED.
When being supplied to the voltage level of data voltage DATA2 of pixel circuit 100 and being essentially equal to initial voltage VINT,
The electric current I for flowing through transistor T1 at this time is 0.5k [OVDD-DATA1]2, pixel circuit 100 is located at the first display pattern, example at this time
The luminance patterns as.When the voltage level for the data voltage DATA2 for being supplied to pixel circuit 100 is greater than initial voltage VINT
When, the electric current I for flowing through transistor T1 at this time is 0.5k [OVDD+DATA2-DATA1-VINT]2, pixel circuit 100 is located at this time
Second display pattern, such as high brightness mode.
In above-described embodiment, transistor T1~T9 be implement to be illustrated with P-type transistor, but the present invention not with
This is limited.In a practical application, transistor T1~T9 can also be replaced with N-type transistor, and accordingly by the control in Fig. 2
Signal S1 processed, control signal S2 and luminous signal EM need to accordingly adjust generating positive and negative voltage level.It, can also be in another practical application
Transistor T1~T9 can be mixed using p-type or N-type transistor.
In other words, when making pixel circuit 100 be located at general luminance patterns, then data voltage DATA2 can be set to just
Beginning voltage VINT, therefore will be proportional to voltage OVDD's and data voltage DATA1 by the electric current I of Organic Light Emitting Diode OLED
Square of difference, that is, [OVDD-DATA1]2, brightness can be adjusted using only the size of data voltage DATA1.To
Pixel circuit 100 is set to be located at high brightness mode, then due to being then proportional to [OVDD+ by the electric current of Organic Light Emitting Diode OLED
DATA2-DATA1-VINT]2, therefore the voltage level of data voltage DATA2 can be improved, or increase data voltage DATA2
With the voltage difference between data voltage DATA1, the electric current of Organic Light Emitting Diode OLED is flowed through with raising.
The present invention provides a kind of pixel circuit 100, the different set by two data voltages is disclosed, to drive organic hair
Optical diode OLED can reduce data voltage DATA1, the driving voltage of DATA2, so that being provided to picture under high brightness mode
Data voltage DATA1 needed for the data line of plain circuit 100, DATA2 are not easy the range that can be supported beyond data drive unit,
Pressure drop effect (IR-Drop) can also moderately be reduced.Under general display pattern, by the voltage of setting data voltage DATA2
Level is the voltage with fixed level, so that electric current I is not influenced by data voltage DATA2.
In conclusion the present invention provides a kind of pixel circuit, by two data lines, and by adjusting two data lines
Voltage difference between data voltage improves the electric current for flowing through Organic Light Emitting Diode, so that pixel circuit can be located at high brightness mould
Formula.In addition, also solving the problems, such as that the existing display with light emitting diode is not easy to improve display brightness.
Although this case is disclosed above with embodiment, so it is not limited to this case, has in any technical field
Usually intellectual, in the spirit and scope for not departing from this case, when can make some changes and embellishment, therefore the protection model of this case
Enclosing should be defined by the scope of the appended claims.
Claims (10)
1. a kind of pixel circuit, characterized by comprising:
One light emitting diode has an anode tap and a cathode terminal；
One the first transistor has a first end, a second end and a gate terminal, the second end electrical property coupling of the first transistor
Connect the anode tap of the light emitting diode；
One capacitor has a first end and a second end, wherein the first end electric property coupling of the capacitor the first transistor
The gate terminal；
One compensation circuit couples between the second end of the first transistor and the gate terminal；
One second transistor has a first end, a second end and a gate terminal, and the first end of the second transistor is to connect
Receive one first data voltage, the first end of the second end electric property coupling of the second transistor the first transistor；
One third transistor has a first end, a second end and a gate terminal, and the first end of the third transistor is to connect
Receive one second data voltage, the second end of the second end electric property coupling of the third transistor capacitor；And
One the 8th transistor has a first end, a second end and a gate terminal, the first end electrical property coupling of the 8th transistor
It is connected to the second end of the capacitor, the second end of the 8th transistor is to receive an initial voltage, and the gate terminal is to connect
Receive a luminous signal.
2. pixel circuit as described in claim 1, which is characterized in that further include:
One the 4th transistor has a first end, a second end and a gate terminal, and the first end of the 4th transistor is to connect
Receive a first voltage, the first end of the second end electric property coupling of the 4th transistor the first transistor；And
One the 5th transistor has a first end, a second end and a gate terminal, the first end electrical property coupling of the 5th transistor
Connect the second end of the first transistor, the anode of the second end electric property coupling of the 5th transistor light emitting diode
End.
3. pixel circuit as described in claim 1, which is characterized in that further include:
One the 6th transistor has a first end, a second end and a gate terminal, the first end electrical property coupling of the 6th transistor
The gate terminal of the first transistor is connect, the second end of the 6th transistor is to receive an initial voltage.
4. pixel circuit as described in claim 1, which is characterized in that the compensation circuit includes one the 7th transistor, has one
First end, a second end and a gate terminal, the first end electric property coupling of the 7th transistor the first transistor this second
End, the gate terminal of the second end electric property coupling of the 7th transistor the first transistor, the grid of the 7th transistor
End is to receive a second control signal.
5. pixel circuit as described in claim 1, which is characterized in that further include:
Wherein when eight transistor turns, the voltage level of the second end of the capacitor is reset according to the initial voltage.
6. pixel circuit as described in claim 1, which is characterized in that further include:
One the 9th transistor has a first end, a second end and a gate terminal, and the first end of the 9th transistor is to connect
An initial voltage is received, the second end of the 9th transistor is coupled to the anode tap of the light emitting diode.
7. pixel circuit as described in claim 1, which is characterized in that further include:
One the 4th transistor has a first end, a second end and a gate terminal, and the first end of the 4th transistor is to connect
Receive a first voltage, the first end of the second end electric property coupling of the 4th transistor the first transistor, the gate terminal is used
To receive the luminous signal；And
One the 5th transistor has a first end, a second end and a gate terminal, the first end electrical property coupling of the 5th transistor
Connect the second end of the first transistor, the anode tap of the second end electric property coupling light emitting diode, the gate terminal to
Receive the luminous signal.
8. pixel circuit as described in claim 1, which is characterized in that further include:
One the 6th transistor, the gate terminal of the first end electric property coupling the first transistor of the 6th transistor, the 6th
One second end of transistor is to receive an initial voltage；And
One the 9th transistor, a first end of the 9th transistor is to receive the initial voltage, and the one of the 9th transistor
Two ends are coupled to the anode tap of the light emitting diode；
Wherein when the 6th transistor and when nine transistor turns, reset the light emitting diode the anode tap and this first
The voltage level of the gate terminal of transistor.
9. pixel circuit as claimed in claim 8, which is characterized in that
When first display pattern, which is essentially equal to the initial voltage；And
When second display pattern, which is greater than the initial voltage.
10. pixel circuit as described in claim 1, which is characterized in that
When second transistor conducting, the voltage electricity of the gate terminal of the first transistor is adjusted according to first data voltage
It is flat；And
When third transistor conducting, the voltage level of the second end of the capacitor is adjusted according to second data voltage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW106143778 | 2017-12-13 | ||
| TW106143778A TWI634540B (en) | 2017-12-13 | 2017-12-13 | Pixel circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108320710A CN108320710A (en) | 2018-07-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI674566B (en) * | 2018-09-05 | 2019-10-11 | 友達光電股份有限公司 | Pixel circuit and high brightness display device |
| TWI708233B (en) * | 2019-09-20 | 2020-10-21 | 友達光電股份有限公司 | Pixel circuit for low frame rate and display device having the same |
| CN111599309B (en) * | 2020-06-30 | 2022-03-11 | 武汉天马微电子有限公司 | Pixel driving circuit, organic light-emitting display panel and display device |
| KR20220052747A (en) * | 2020-10-21 | 2022-04-28 | 엘지디스플레이 주식회사 | Organic light emitting display device |
| CN112581908A (en) * | 2020-12-23 | 2021-03-30 | 上海天马有机发光显示技术有限公司 | Pixel driving circuit, driving method, display panel and display device |
| CN112908258B (en) * | 2021-03-23 | 2022-10-21 | 武汉天马微电子有限公司 | Pixel driving circuit, driving method, display panel and display device |
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Also Published As
| Publication number | Publication date |
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| TWI634540B (en) | 2018-09-01 |
| CN108320710A (en) | 2018-07-24 |
| TW201928930A (en) | 2019-07-16 |
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