CN104318894A - Pixel circuit and driving method thereof, and display apparatus - Google Patents
Pixel circuit and driving method thereof, and display apparatus Download PDFInfo
- Publication number
- CN104318894A CN104318894A CN201410522250.1A CN201410522250A CN104318894A CN 104318894 A CN104318894 A CN 104318894A CN 201410522250 A CN201410522250 A CN 201410522250A CN 104318894 A CN104318894 A CN 104318894A
- Authority
- CN
- China
- Prior art keywords
- transistor
- voltage
- pixel circuit
- signal input
- pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000003990 capacitor Substances 0.000 claims abstract description 38
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 230000002411 adverse Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- 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]
-
- 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
Landscapes
- 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 embodiments of the invention provide a pixel circuit and a driving method thereof, and a display apparatus, and relates to the field of a display technology, for solving the problem of affected driving current flowing through a luminescent device when ohm voltage drop of a first voltage end and the grid source voltage driving a transistor generate nonlinear change. The pixel circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a storage capacitor and the luminescent device.
Description
Technical Field
The invention relates to the technical field of display, in particular to a pixel circuit, a driving method thereof and a display device.
Background
With the rapid progress of display technology, semiconductor device technology, which is the core of display devices, has also been dramatically advanced. For the conventional display device, an Organic Light Emitting Diode (OLED), which is a current type Light Emitting device, is increasingly used in the field of high performance display due to its characteristics of self-luminescence, fast response, wide viewing angle, and being capable of being fabricated on a flexible substrate.
An OLED display may be formed using the above-described OLED device, and an array substrate of the display may be provided with a plurality of TFTs (Thin Film transistors). In order to improve the carrier mobility of the TFT and to reduce the resistivity, the power consumption is made smaller when the same current is passed. The above-described TFT is generally formed using polycrystalline silicon. However, due to the manufacturing process and the characteristics of polysilicon, when TFT switching circuits are fabricated on large-area glass substrates, fluctuations often occur in electrical parameters such as threshold voltage Vth, mobility, and the like, so that the current flowing through the OLED device not only changes with the change of stress of the on voltage generated by long-time turn-on of the TFT, but also varies with the shift of the threshold voltage Vth of the TFT. This will affect the brightness uniformity and brightness constancy of the display. Thereby reducing the picture quality and quality of the display.
Disclosure of Invention
Embodiments of the present invention provide a pixel circuit, a driving method thereof, and a display device, which can improve the defect of non-uniform display brightness of a display.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in one aspect of the embodiments of the present invention, a pixel circuit is provided, including: a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a storage capacitor, and a light emitting device;
the grid electrode of the first transistor is connected with a light-emitting control signal input end, the first pole of the first transistor is connected with one end of the storage capacitor, and the second pole of the first transistor is connected with a reference voltage end;
the grid electrode of the second transistor is connected with a reset signal input end, the first pole of the second transistor is connected with the other end of the storage capacitor, and the second pole of the second transistor is connected with the reference voltage end;
the grid electrode of the third transistor is connected with the grid line, the first pole of the third transistor is connected with the data line, and the second pole of the third transistor is connected with one end of the storage capacitor;
a grid electrode of the fourth transistor is connected with the grid line, a first electrode of the fourth transistor is connected with the other end of the storage capacitor, and a second electrode of the fourth transistor is connected with a second electrode of the fifth transistor;
the grid electrode of the fifth transistor is connected with the other end of the storage capacitor, the first pole of the fifth transistor is connected with the first voltage end, and the second pole of the fifth transistor is connected with the second pole of the fourth transistor;
a grid electrode of the sixth transistor is connected with the light-emitting control signal input end, a first electrode of the sixth transistor is connected with a second electrode of the fifth transistor, and the second electrode of the sixth transistor is connected with an anode of the light-emitting device;
the cathode of the light emitting device is connected to the second voltage terminal.
In another aspect of the embodiments of the present invention, there is provided a display device including any one of the pixel circuits described above.
In a further aspect of the embodiments of the present invention, there is provided a pixel circuit driving method, including a method of driving any one of the pixel circuits described above, the method further including:
the second transistor is turned on, and a voltage signal input by the reference voltage end is transmitted to the grid electrode of the fifth transistor and stored in the storage capacitor;
turning on a third transistor, transmitting a data voltage input by a data line to a second pole of the third transistor through the third transistor, and storing the data voltage in the storage capacitor; turning on a fourth transistor, turning on a gate and a second pole of the fifth transistor, and writing a voltage into the gate of the fifth transistor;
and turning on the first transistor, the fifth transistor and the sixth transistor, and driving the light-emitting device to emit light through the current of the fifth transistor and the current of the sixth transistor.
The embodiment of the invention provides a pixel circuit, a driving method thereof and a display device, wherein the pixel circuit performs switching and charging and discharging control on the circuit through a plurality of transistors and a storage capacitor. Specifically, one end of a fifth transistor as a driving transistor is directly connected to the first voltage terminal and a reference voltage is introduced into the pixel circuit, so that a driving current flowing through the light emitting device is related to only the reference voltage and a data voltage inputted from the data line. This is done. The light emitting device can be prevented from being influenced by threshold voltage, the influence of ohmic voltage drop of the first voltage end on the driving current flowing through the light emitting device can be avoided, and in addition, the fifth transistor is directly connected with the first voltage end, so that the nonlinear change of the grid-source voltage of the fifth transistor is avoided, and the influence on the driving current flowing through the light emitting device is avoided. In summary, the pixel circuit provided by the invention can improve the uniformity of the display brightness of the display device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
fig. 2 is a timing diagram of a control signal of a pixel circuit according to an embodiment of the present invention;
fig. 3-5 are schematic diagrams illustrating connection of a pixel circuit at various stages according to an embodiment of the invention;
fig. 6 is a flowchart of a driving method of a pixel circuit according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a pixel circuit, as shown in fig. 1, which may include a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, a storage capacitor Cst, and a light emitting device D.
The gate of the first transistor T1 is connected to the emission control signal input end Em, the first pole is connected to one end (node a) of the storage capacitor Cst, and the second pole is connected to the reference voltage terminal Vref.
The gate of the second transistor T2 is connected to the Reset signal input terminal Reset, the first pole is connected to the other end (node b) of the storage capacitor Cst, and the second pole is connected to the reference voltage terminal Vref.
The third transistor T3 has a Gate connected to the Gate line Gate, a first electrode connected to the Data line Data, and a second electrode connected to one end (node a) of the storage capacitor Cst.
The Gate of the fourth transistor T4 is connected to the Gate line Gate, the first electrode is connected to the other end (node b) of the storage capacitor Cst, and the second electrode is connected to the second electrode of the fifth transistor T5.
The gate of the fifth transistor T5 is connected to the other end (node b) of the storage capacitor Cst, the first pole (node c) is connected to the first voltage terminal Vdd, and the second pole (node d) is connected to the second pole of the fourth transistor T4.
The sixth transistor T6 has a gate connected to the emission control signal input terminal Em, a first pole connected to the second pole of the fifth transistor T5, and a second pole connected to the anode of the light emitting device D.
The cathode of the light emitting device D is connected to the second voltage terminal Vss.
It should be noted that the Light Emitting device D in the embodiment of the present invention may be a variety of current driven Light Emitting devices including an LED (Light Emitting Diode) or an OLED (organic Light Emitting Diode) in the prior art. In the embodiment of the present invention, an OLED is taken as an example for description.
The embodiment of the invention provides a pixel circuit, which is used for controlling the switching, charging and discharging of the circuit through a plurality of transistors and a storage capacitor. Specifically, one end of a fifth transistor as a driving transistor is directly connected to the first voltage terminal, and a reference voltage is introduced into the pixel circuit, so that the driving current flowing through the light emitting device is related to only the reference voltage and the data voltage inputted from the data line. This is done. The light emitting device can be prevented from being influenced by threshold voltage, the influence of ohmic voltage drop of the first voltage end on the driving current flowing through the light emitting device can be avoided, and in addition, the fifth transistor is directly connected with the first voltage end, so that the nonlinear change of the grid-source voltage of the fifth transistor is avoided, and the influence on the driving current flowing through the light emitting device is avoided. In summary, the pixel circuit provided by the invention can improve the uniformity of the display brightness of the display device.
It should be noted that, in the first embodiment of the present invention, the voltage input to the first voltage terminal Vdd may be a high voltage, and the voltage input to the second voltage terminal Vss may be a low voltage or a ground terminal.
Second, transistors can be classified into P-channel transistors (referred to as P-type transistors) and N-channel transistors (referred to as N-type transistors) according to the channel type of the transistors. Therefore, as for the transistors in the pixel circuit described above, the first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5, and the sixth transistor T6 may all be P-type transistors.
Or,
the first transistor T1, the second transistor T2, the third transistor T4, the fourth transistor T5, and the sixth transistor T5 may all be N-type transistors.
Further, the transistors in the pixel circuit described above may be divided into enhancement type transistors and depletion type transistors according to the way in which the transistors conduct, and the threshold voltage Vth is a positive value for the enhancement type TFT and a negative value for the depletion type TFT.
The embodiment of the invention is described by taking the first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5 and the sixth transistor T6 as P-type depletion transistors as an example. First poles of the first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5 and the sixth transistor T6 are all source poles, and second poles are all drain poles. In this case, the voltage signal inputted from the reference voltage terminal Vref is a low voltage, and the threshold voltage Vth is a negative value.
When different types of transistors are used, the external control signals of the pixel circuits are also different. And the timing of the control signals is also different. For example, when the first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5, and the sixth transistor T6 are all N-type transistors. The voltage signal inputted to the reference voltage terminal Vref is high level. And, the timing of its respective control signals is opposite to the corresponding signal timing shown in fig. 2 (i.e., the two are 180 degrees out of phase).
The operation of the pixel circuit provided by the embodiment of the present invention is described in detail with reference to fig. 2.
When the pixel circuit shown in fig. 1 works, the working process of the pixel circuit can be specifically divided into three stages, which specifically include:
the reset phase P1, the equivalent circuit diagram of this phase is shown in fig. 3, where the actual energized lines and devices are shown in solid lines and the portions not energized are shown in dashed lines, and the equivalent circuit diagrams are shown in the same manner as the diagram below. In the Reset phase P1, the Reset signal terminal Reset inputs a low level, the second transistor T2 is turned on, the gate voltage Vg of the fifth transistor T5 is set to the voltage input from the reference voltage terminal Vref, and the voltage is stored in the storage capacitor Cst. Since the reference voltage Vref is low, the gate voltage Vg of the fifth transistor T5, which is a driving transistor, can be reset. In this case, the fifth transistor T5 is in an off state.
The voltage signal inputted from the Gate line Gate and the voltage signal inputted from the emission control signal input terminal Em are at high level. The third transistor T3, the fourth transistor T4, the first transistor T1, and the sixth transistor T6 are all in an off state.
At this stage, since the gate voltage Vg of the fifth transistor T5 is reset, the voltage signal of the previous frame remaining on the node b of the pixel circuit is released, thereby avoiding the adverse effect of the voltage signal of the previous frame on the voltage signal of the next frame and ensuring the stability of the potential of the node b.
The writing phase P2, which is an equivalent circuit diagram of the phase shown in fig. 4, is a phase in which the Gate line Gate inputs a low level, the third transistor T3 and the fourth transistor T4 are turned on, and the data voltage Vdata input to the data line is transmitted to the node a through the third transistor T3 and stored in the storage capacitor Cst. When the fourth transistor T4 is turned on, the drain (node d) and the gate of the fifth transistor T5 are turned on, so that they are in a diode-connected state. After the voltage inputted from the first voltage terminal Vdd passes through the fifth transistor T5, a voltage level lower than the voltage inputted from the first voltage terminal Vdd by one threshold voltage Vth of the fifth transistor T5 itself is written into the gate of the fifth transistor T5, and at this time, the gate voltage Vg of the fifth transistor T5, which is a driving transistor, is Vdd- (-Vth). Since the fifth transistor T5 is a P-type depletion transistor, the threshold voltage Vth is negative.
Since the voltage signal input from the Reset signal terminal Reset and the voltage signal input from the emission control signal input terminal Em are at a high level. Accordingly, the second transistor T2, the first transistor T1, and the sixth transistor T6 are in an off state.
A light emitting period P3, an equivalent circuit diagram of which is shown in fig. 5, in which a low level is input to the input terminal of the light emitting control signal Em to turn on the first transistor T1 and the sixth transistor T6, and the voltage input from the reference voltage terminal Vref is stored in the storage capacitor Cst via the node a, so that the node b generates a voltage increment of Vref-Vdata due to the bootstrap effect of the storage capacitor Cst. In this case, the gate voltage Vg of the fifth transistor T5 is increased by Vref-Vdata again, specifically:
Vg(T5)＝Vref-Vdata+Vdd-(-Vth)；
therefore, the gate-source voltage Vgs (i.e., the voltage difference between the voltage of the gate node b and the source node c) of the fifth transistor T5 is:
Vgs(T5)＝Vg-Vs＝Vref-Vdata+Vdd-(-Vth)-Vdd＝Vref-Vdata+Vth；
in this case, the driving current I flowing through the fifth transistor T5 is:
I＝K/2(Vgs-Vth)2＝K/2(Vref-Vdata)2。
the driving current I drives the light emitting device D to emit light.
As can be seen from this, on the one hand, the driving current I flowing through the fifth transistor T5 is independent of the threshold voltage Vth of the fifth transistor T5, and therefore, the pixel circuit can prevent the light emitting device D from being affected by the threshold voltage.
On the other hand, the driving current I is also independent of the voltage input to the first voltage terminal Vdd. If during the compensation process, the driving current I of the OLED device is related to the signal inputted from the first voltage terminal Vdd. Then current always flows through the first voltage terminal Vdd during the light emitting process of the OLED device, causing ohmic voltage Drop (IR Drop) such that the adjacent pixels have a portion of the signal input from the first voltage terminal Vdd, thereby causing a Drop in the driving current I flowing through the OLED device and gray scale distortion. Therefore, the pixel circuit can prevent the ohmic voltage drop generated by the first voltage terminal Vdd from affecting the flow of the light emitting device D.
On the other hand, the source of the fifth transistor T5 is directly connected to the first voltage terminal Vdd. If an additional transistor (not shown) is disposed between the fifth transistor T5 and the first voltage terminal Vdd, the current flowing through the additional transistor also generates a voltage drop Vds 'at the source-drain terminal thereof, and thus, the gate-source voltage Vgs of the fifth transistor T5 should be Vdata + Vth-Vdd-Vds'. Vds' is determined by the current flowing through the additional transistor (i.e. the driving current I of the OLED device), however, the driving current I of the OLED device is also controlled by the data voltage Vdata, so that the gate-source voltage Vgs of the fifth transistor T5 changes non-linearly, resulting in gray scale distortion of the pixel display. Thereby adversely affecting the quality and display effect of the display device. Therefore, the pixel circuit described above can eliminate the effect of the transistor between the fifth transistor T5 and the first voltage terminal Vdd on the driving current I flowing through the light emitting device D due to the non-linear variation of the gate-source voltage Vgs of the fifth transistor T5 serving as a driving transistor.
In summary, the pixel circuit provided by the embodiment of the invention can improve the uniformity of the display brightness of the display device.
In addition, at this stage, the voltage signal inputted from the Gate line Gate and the voltage signal inputted from the Reset signal terminal Reset are at a high level. Therefore, the third transistor T3 and the fourth transistor T4 are turned off when the second transistor T2 is turned off.
An embodiment of the present invention further provides a display device, including any one of the pixel circuits described above. The display device may comprise a plurality of arrays of pixel cells, each pixel cell comprising any one of the pixel circuits as described above. The pixel circuit has the same advantages as the pixel circuit provided by the foregoing embodiment of the present invention, and the detailed description of the pixel circuit in the foregoing embodiment is omitted here for brevity.
Specifically, the display device provided by the embodiment of the invention can be a display device with a current-driven light emitting device including an LED display or an OLED display.
An embodiment of the present invention provides a pixel circuit driving method, which may include a method of driving a pixel circuit shown in fig. 1, and as shown in fig. 6, the method may further include:
s101, as shown in fig. 3, the second transistor T2 is turned on, and the voltage signal inputted from the reference voltage terminal Vef is transmitted to the gate of the fifth transistor T5 and stored in the storage capacitor Cst.
S102, as shown in fig. 4, turning on the third transistor T3, transmitting the Data voltage Vdata input from the Data line Data to the second electrode (drain) of the third transistor T3 through the third transistor T3, and storing the Data voltage Vdata in the storage capacitor Cst; the fourth transistor T4 is turned on, the gate and the second pole (drain) of the fifth transistor T5 are turned on, and voltage writing is performed to the gate of the fifth transistor T5.
S103, the first transistor T1, the fifth transistor T5, and the sixth transistor T6 are turned on, and the light emitting device D is driven to emit light by the current of the fifth transistor T5 and the sixth transistor T6.
The embodiment of the invention provides a pixel circuit driving method, which is used for controlling the switching, charging and discharging of a circuit through a plurality of transistors and a storage capacitor in the pixel circuit. The method specifically comprises the following steps: firstly, the second transistor is conducted, a voltage signal input by a reference voltage end is transmitted to the grid electrode of the fifth transistor and stored in the storage capacitor to reset the grid electrode of the fifth transistor, and the influence of a previous frame signal on the frame signal is avoided; then, turning on the third transistor, transmitting the data voltage input by the data line to the second pole of the third transistor through the third transistor, and storing the data voltage in the storage capacitor; turning on the fourth transistor to turn on the gate and the second pole of the fifth transistor, so that the magnitude of the voltage written into the gate of the fifth transistor is the voltage input by the first voltage end minus the threshold voltage of the fifth transistor; finally, the first transistor, the fifth transistor, and the sixth transistor are turned on, and the light emitting device is driven to emit light by the current of the fifth transistor and the sixth transistor. In this way, the driving current flowing through the light emitting device is only related to the reference voltage and the data voltage input by the data line, so that not only the light emitting device is prevented from being influenced by the threshold voltage, but also the ohmic voltage drop of the first voltage terminal is prevented from influencing the driving current flowing through the light emitting device. In addition, the voltage input by the first voltage end is directly input into the fifth transistor, so that the influence on the driving current flowing through the light-emitting device when the gate-source voltage of the fifth transistor changes in a nonlinear mode is avoided. In summary, the control method of the pixel circuit provided by the embodiment of the invention can improve the uniformity of the display brightness of the display device.
In addition, the transistors in the pixel circuit: the first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5, and the sixth transistor T6 may all be P-type transistors.
Or,
the first transistor T1, the second transistor T2, the third transistor T4, the fourth transistor T5, and the sixth transistor T5 may all be N-type transistors.
In addition, the transistors in the pixel circuit may be enhancement transistors or depletion transistors according to the conduction manner of the transistors.
Here, the pixel circuit in the following embodiments is described by taking as an example that the first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5, and the sixth transistor T6 may all be P-type depletion transistors. The timing of the control signal in the driving method of the pixel circuit may include:
reset phase P1: the voltage signal input from the Reset signal terminal Reset is at a low level, and the voltage signal input from the Gate line Gate, the Data voltage Vdata input from the Data line Data, and the voltage signal input from the emission control signal input terminal Em are at a high level.
Specifically, in the Reset phase P1, the Reset signal terminal Reset inputs a low level, the second transistor T2 is turned on, the gate voltage Vg of the fifth transistor T5 is set to the voltage input from the reference voltage terminal Vref, and the voltage is stored in the storage capacitor Cst. Since the reference voltage Vref is low, the gate voltage Vg of the fifth transistor T5, which is a driving transistor, can be reset. In this case, the fifth transistor T5 is in an off state.
The voltage signal inputted from the Gate line Gate and the voltage signal inputted from the emission control signal input terminal Em are at high level. The third transistor T3, the fourth transistor T4, the first transistor T1, and the sixth transistor T6 are all in an off state.
At this stage, since the gate voltage Vg of the fifth transistor T5 is reset, the voltage signal of the previous frame remaining on the node b of the pixel circuit is released, thereby avoiding the adverse effect of the voltage signal of the previous frame on the voltage signal of the next frame and ensuring the stability of the potential of the node b.
Write phase P2: the voltage signal input to the Gate line Gate is at a low level, and the Data voltage Vdata input to the Data line Data, the voltage signal input to the Reset signal terminal Reset, and the voltage signal input to the emission control signal input terminal Em are at a high level.
Specifically, at this stage, the Gate line Gate inputs a low level, the third transistor T3 and the fourth transistor T4 are turned on, and the data voltage Vdata input to the data line is transmitted to the node a through the third transistor T3 and stored in the storage capacitor Cst. When the fourth transistor T4 is turned on, the drain (node d) and the gate of the fifth transistor T5 are turned on, so that they are in a diode-connected state. After the voltage inputted from the first voltage terminal Vdd passes through the fifth transistor T5, a voltage level lower than the voltage inputted from the first voltage terminal Vdd by one threshold voltage Vth of the fifth transistor T5 itself is written into the gate of the fifth transistor T5, and at this time, the gate voltage Vg of the fifth transistor T5, which is a driving transistor, is Vdd- (-Vth). Since the fifth transistor T5 is a P-type depletion transistor, the threshold voltage Vth is negative.
Since the voltage signal input from the Reset signal terminal Reset and the voltage signal input from the emission control signal input terminal Em are at a high level. Accordingly, the second transistor T2, the first transistor T1, and the sixth transistor T6 are in an off state.
Light emission phase P3: the Data voltage Vdata input by the Data line Data and the voltage signal input by the emission control signal input terminal Em are at low levels, and the voltage signal input by the Gate line Gate and the voltage signal input by the Reset signal terminal Reset are at high levels.
Specifically, as shown in fig. 5, in this stage, a low level is input to the input terminal of the emission control signal Em to turn on the first transistor T1 and the sixth transistor T6, the voltage input from the reference voltage terminal Vref is stored in the storage capacitor Cst via the node a, and due to the bootstrap effect of the storage capacitor Cst, the node b generates a voltage increment with a magnitude of Vref-Vdata. In this case, the gate voltage Vg of the fifth transistor T5 is increased by Vref-Vdata again, specifically:
Vg(T5)＝Vref-Vdata+Vdd-(-Vth)；
therefore, the gate-source voltage Vgs (i.e., the voltage difference between the voltage of the gate node b and the source node c) of the fifth transistor T5 is:
Vgs(T5)＝Vg-Vs＝Vref-Vdata+Vdd-(-Vth)-Vdd＝Vref-Vdata+Vth；
in this case, the driving current I flowing through the fifth transistor T5 is:
I＝K/2(Vgs-Vth)2＝K/2(Vref-Vdata)2。
the driving current I drives the light emitting device D to emit light.
As can be seen from this, on the one hand, the driving current I flowing through the fifth transistor T5 is independent of the threshold voltage Vth of the fifth transistor, and therefore, the pixel circuit can prevent the light emitting device D from being affected by the threshold voltage.
On the other hand, the driving current I is also independent of the voltage input to the first voltage terminal Vdd. If during the compensation process, the driving current I of the OLED device is related to the signal inputted from the first voltage terminal Vdd. Then current always flows through the first voltage terminal Vdd during the light emitting process of the OLED device, causing ohmic voltage Drop (IR Drop) such that the adjacent pixels have a portion of the signal input from the first voltage terminal Vdd, thereby causing a Drop in the driving current I flowing through the OLED device and gray scale distortion. Therefore, the pixel circuit can prevent the ohmic voltage drop generated by the first voltage terminal Vdd from affecting the flow of the light emitting device D.
On the other hand, the source of the fifth transistor T5 is directly connected to the first voltage terminal Vdd. If an additional transistor (not shown) is disposed between the fifth transistor T5 and the first voltage terminal Vdd, the current flowing through the additional transistor also generates a voltage drop Vds 'at the source-drain terminal thereof, and thus, the gate-source voltage Vgs of the fifth transistor T5 should be Vdata + Vth-Vdd-Vds'. Vds' is determined by the current flowing through the additional transistor (i.e. the driving current I of the OLED device), however, the driving current I of the OLED device is also controlled by the data voltage Vdata, so that the gate-source voltage Vgs of the fifth transistor T5 changes non-linearly, resulting in gray scale distortion of the pixel display. Thereby adversely affecting the quality and display effect of the display device. The pixel circuit can thus eliminate the effect of the non-linear variation of the gate-source voltage Vgs of the fifth transistor T5 as a driving transistor on the driving current I flowing through the light emitting device D caused by the transistor between the fifth transistor T5 and the first voltage terminal Vdd in the prior art.
In summary, the pixel circuit provided by the embodiment of the invention can improve the uniformity of the display brightness of the display device.
In addition, at this stage, the voltage signal inputted from the Gate line Gate and the voltage signal inputted from the Reset signal terminal Reset are at a high level. Therefore, the third transistor T3 and the fourth transistor T4 are turned off when the second transistor T2 is turned off.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A pixel circuit, comprising: a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a storage capacitor, and a light emitting device;
the grid electrode of the first transistor is connected with a light-emitting control signal input end, the first pole of the first transistor is connected with one end of the storage capacitor, and the second pole of the first transistor is connected with a reference voltage end;
the grid electrode of the second transistor is connected with a reset signal input end, the first pole of the second transistor is connected with the other end of the storage capacitor, and the second pole of the second transistor is connected with the reference voltage end;
the grid electrode of the third transistor is connected with the grid line, the first pole of the third transistor is connected with the data line, and the second pole of the third transistor is connected with one end of the storage capacitor;
a grid electrode of the fourth transistor is connected with the grid line, a first electrode of the fourth transistor is connected with the other end of the storage capacitor, and a second electrode of the fourth transistor is connected with a second electrode of the fifth transistor;
the grid electrode of the fifth transistor is connected with the other end of the storage capacitor, the first pole of the fifth transistor is connected with the first voltage end, and the second pole of the fifth transistor is connected with the second pole of the fourth transistor;
a grid electrode of the sixth transistor is connected with the light-emitting control signal input end, a first electrode of the sixth transistor is connected with a second electrode of the fifth transistor, and the second electrode of the sixth transistor is connected with an anode of the light-emitting device;
the cathode of the light emitting device is connected to the second voltage terminal.
2. The pixel circuit according to claim 1, wherein the first transistor, the second transistor, the third transistor, the fourth transistor, the fifth transistor, and the sixth transistor are each a P-type transistor; or,
the first transistor, the second transistor, the third transistor, the fourth transistor, the fifth transistor, and the sixth transistor are all N-type transistors.
3. The pixel circuit according to claim 1, wherein first electrodes of the first transistor, the second transistor, the third transistor, the fourth transistor, the fifth transistor, and the sixth transistor are all source electrodes, and second electrodes thereof are all drain electrodes.
4. A pixel circuit according to any one of claims 1-3, wherein the transistor comprises a depletion mode transistor or an enhancement mode transistor.
5. A pixel circuit according to any of claims 1-3, wherein the light emitting device is an organic light emitting diode.
6. A display device comprising the pixel circuit according to any one of claims 1 to 5.
7. A pixel circuit driving method comprising a method of driving the pixel circuit according to any one of claims 1 to 5, the method further comprising:
the second transistor is turned on, and a voltage signal input by the reference voltage end is transmitted to the grid electrode of the fifth transistor and stored in the storage capacitor;
turning on a third transistor, transmitting a data voltage input by a data line to a second pole of the third transistor through the third transistor, and storing the data voltage in the storage capacitor; turning on a fourth transistor, turning on a gate and a second pole of the fifth transistor, and writing a voltage into the gate of the fifth transistor;
and turning on the first transistor, the fifth transistor and the sixth transistor, and driving the light-emitting device to emit light through the current of the fifth transistor and the current of the sixth transistor.
8. The pixel circuit driving method according to claim 7, wherein the first transistor, the second transistor, the third transistor, the fourth transistor, the fifth transistor, and the sixth transistor are all P-type transistors; or,
the first transistor, the second transistor, the third transistor, the fourth transistor, the fifth transistor, and the sixth transistor are all N-type transistors.
9. The pixel circuit driving method according to claim 7 or 8, wherein the transistor includes a depletion transistor or an enhancement transistor.
10. The pixel circuit driving method according to claim 9, wherein when the first transistor, the second transistor, the third transistor, the fourth transistor, the fifth transistor, and the sixth transistor are all P-type depletion transistors, timing of a control signal includes:
a reset phase: the voltage signal input by the reset signal end is at low level, and the voltage signal input by the grid line, the data voltage input by the data line and the voltage signal input by the light-emitting control signal input end are at high level;
a writing stage: the voltage signal input by the grid line is at a low level, and the data voltage input by the data line, the voltage signal input by the reset signal end and the voltage signal input by the light-emitting control signal input end are at a high level;
a light emitting stage: the data voltage input by the data line and the voltage signal input by the light-emitting control signal input end are at low level, and the voltage signal input by the grid line and the voltage signal input by the reset signal end are at high level.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410522250.1A CN104318894B (en) | 2014-09-30 | 2014-09-30 | Pixel circuit driving method |
| PCT/CN2015/071735 WO2016050021A1 (en) | 2014-09-30 | 2015-01-28 | Pixel driving circuit and driving method therefor, pixel unit, and display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410522250.1A CN104318894B (en) | 2014-09-30 | 2014-09-30 | Pixel circuit driving method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104318894A true CN104318894A (en) | 2015-01-28 |
| CN104318894B CN104318894B (en) | 2017-02-15 |
Family
ID=52374118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410522250.1A Active CN104318894B (en) | 2014-09-30 | 2014-09-30 | Pixel circuit driving method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104318894B (en) |
| WO (1) | WO2016050021A1 (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575389A (en) * | 2015-01-29 | 2015-04-29 | 京东方科技集团股份有限公司 | Pixel circuit, driving method of pixel circuit, display panel and display device |
| CN104658484A (en) * | 2015-03-18 | 2015-05-27 | 上海和辉光电有限公司 | Display device, pixel driving circuit and driving method of pixel driving circuit |
| CN104766566A (en) * | 2015-03-10 | 2015-07-08 | 友达光电股份有限公司 | Pixel structure |
| CN104992674A (en) * | 2015-07-24 | 2015-10-21 | 上海和辉光电有限公司 | Pixel compensation circuit |
| CN106952613A (en) * | 2017-05-27 | 2017-07-14 | 上海天马有机发光显示技术有限公司 | The driving method of OLED pixel circuit, display device and OLED pixel circuit |
| CN107093404A (en) * | 2016-02-17 | 2017-08-25 | 上海和辉光电有限公司 | Pixel compensation circuit and display device |
| CN107507567A (en) * | 2017-10-18 | 2017-12-22 | 京东方科技集团股份有限公司 | A kind of pixel compensation circuit, its driving method and display device |
| CN109346010A (en) * | 2018-12-26 | 2019-02-15 | 昆山国显光电有限公司 | A kind of pixel circuit and its driving method, display device |
| CN109920374A (en) * | 2017-12-13 | 2019-06-21 | 京东方科技集团股份有限公司 | Pixel-driving circuit and its control method, display panel and electronic equipment |
| CN109979394A (en) * | 2019-05-17 | 2019-07-05 | 京东方科技集团股份有限公司 | Pixel circuit and its driving method, array substrate and display device |
| CN110010058A (en) * | 2019-05-20 | 2019-07-12 | 京东方科技集团股份有限公司 | Array substrate and display panel |
| WO2019223341A1 (en) * | 2018-05-25 | 2019-11-28 | 京东方科技集团股份有限公司 | Pixel circuit and drive method therefor, and display device |
| CN110738964A (en) * | 2019-10-29 | 2020-01-31 | 京东方科技集团股份有限公司 | Pixel circuit and display device |
| CN111164669A (en) * | 2019-12-19 | 2020-05-15 | 重庆康佳光电技术研究院有限公司 | Electroluminescent display, pixel compensation circuit and voltage compensation method thereof |
| CN111951730A (en) * | 2020-08-21 | 2020-11-17 | Oppo（重庆）智能科技有限公司 | Display device, electronic device, display control method, and storage medium |
| CN114582289A (en) * | 2022-04-21 | 2022-06-03 | 武汉天马微电子有限公司 | Display panel, driving method thereof and display device |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI688934B (en) * | 2018-12-07 | 2020-03-21 | 友達光電股份有限公司 | Pixel circuit |
| CN110827730B (en) * | 2019-11-28 | 2022-12-13 | 京东方科技集团股份有限公司 | Circuit and method for detecting characteristics of transistors in pixel region of LTPSAMOLED display substrate |
| CN111341245B (en) * | 2020-04-15 | 2022-10-04 | 昆山国显光电有限公司 | Pixel driving circuit, display panel and terminal equipment |
| CN113870764A (en) * | 2020-06-11 | 2021-12-31 | 成都辰显光电有限公司 | Pixel circuit and display panel |
| TWI787005B (en) * | 2021-12-21 | 2022-12-11 | 友達光電股份有限公司 | Display driving circuit and driving method thereof |
| CN115762414B (en) * | 2022-11-17 | 2024-09-10 | 上海和辉光电股份有限公司 | AMOLED display driving circuit, display panel and display driving method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281723A (en) * | 2008-05-23 | 2008-10-08 | 上海广电光电子有限公司 | Pixel circuit of organic luminous display as well as drive method thereof |
| CN102930824A (en) * | 2012-11-13 | 2013-02-13 | 京东方科技集团股份有限公司 | Pixel circuit and driving method and display device |
| CN103886838A (en) * | 2014-03-24 | 2014-06-25 | 京东方科技集团股份有限公司 | Pixel compensation circuit, array substrate and display device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100560780B1 (en) * | 2003-07-07 | 2006-03-13 | 삼성에스디아이 주식회사 | Pixel circuit in OLED and Method for fabricating the same |
| KR101503070B1 (en) * | 2008-10-28 | 2015-03-16 | 엘지디스플레이 주식회사 | Organic Light Emitting Diode Display |
| KR101769499B1 (en) * | 2010-08-24 | 2017-08-21 | 삼성디스플레이 주식회사 | Organic electroluminescence emitting display device |
| CN103021333B (en) * | 2012-12-11 | 2016-01-20 | 昆山工研院新型平板显示技术中心有限公司 | The image element circuit of organic light emitting display and driving method thereof |
| CN103150991A (en) * | 2013-03-14 | 2013-06-12 | 友达光电股份有限公司 | Pixel compensation circuit for AMOLED (Active Matrix/Organic Light Emitting Diode) displayer |
| TW201441997A (en) * | 2013-04-24 | 2014-11-01 | Wintek Corp | Light-emitting component driving circuit and related pixel circuit and applications using the same |
| CN203733450U (en) * | 2014-03-24 | 2014-07-23 | 京东方科技集团股份有限公司 | Pixel compensation circuit, array substrate and display device |
-
2014
- 2014-09-30 CN CN201410522250.1A patent/CN104318894B/en active Active
-
2015
- 2015-01-28 WO PCT/CN2015/071735 patent/WO2016050021A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281723A (en) * | 2008-05-23 | 2008-10-08 | 上海广电光电子有限公司 | Pixel circuit of organic luminous display as well as drive method thereof |
| CN102930824A (en) * | 2012-11-13 | 2013-02-13 | 京东方科技集团股份有限公司 | Pixel circuit and driving method and display device |
| CN103886838A (en) * | 2014-03-24 | 2014-06-25 | 京东方科技集团股份有限公司 | Pixel compensation circuit, array substrate and display device |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575389A (en) * | 2015-01-29 | 2015-04-29 | 京东方科技集团股份有限公司 | Pixel circuit, driving method of pixel circuit, display panel and display device |
| CN104766566A (en) * | 2015-03-10 | 2015-07-08 | 友达光电股份有限公司 | Pixel structure |
| CN104658484A (en) * | 2015-03-18 | 2015-05-27 | 上海和辉光电有限公司 | Display device, pixel driving circuit and driving method of pixel driving circuit |
| CN104992674A (en) * | 2015-07-24 | 2015-10-21 | 上海和辉光电有限公司 | Pixel compensation circuit |
| CN107093404A (en) * | 2016-02-17 | 2017-08-25 | 上海和辉光电有限公司 | Pixel compensation circuit and display device |
| US10529281B2 (en) | 2016-02-17 | 2020-01-07 | Everdisplay Optronics (Shanghai) Limited | Pixel compensation circuit and display device |
| CN106952613B (en) * | 2017-05-27 | 2019-05-07 | 上海天马有机发光显示技术有限公司 | The driving method of OLED pixel circuit, display device and OLED pixel circuit |
| CN106952613A (en) * | 2017-05-27 | 2017-07-14 | 上海天马有机发光显示技术有限公司 | The driving method of OLED pixel circuit, display device and OLED pixel circuit |
| CN107507567A (en) * | 2017-10-18 | 2017-12-22 | 京东方科技集团股份有限公司 | A kind of pixel compensation circuit, its driving method and display device |
| US10672332B2 (en) | 2017-10-18 | 2020-06-02 | Boe Technology Group Co., Ltd. | Pixel compensation circuit and driving method thereof, and display device |
| CN109920374A (en) * | 2017-12-13 | 2019-06-21 | 京东方科技集团股份有限公司 | Pixel-driving circuit and its control method, display panel and electronic equipment |
| CN109920374B (en) * | 2017-12-13 | 2020-12-22 | 京东方科技集团股份有限公司 | Pixel driving circuit, control method thereof, display panel and electronic equipment |
| US11527199B2 (en) | 2017-12-13 | 2022-12-13 | Beijing Boe Display Technology Co., Ltd. | Pixel circuit including discharge control circuit and storage control circuit and method for driving pixel circuit, display panel and electronic device |
| WO2019223341A1 (en) * | 2018-05-25 | 2019-11-28 | 京东方科技集团股份有限公司 | Pixel circuit and drive method therefor, and display device |
| US10991307B2 (en) | 2018-05-25 | 2021-04-27 | Beijing Boe Display Technology Co., Ltd. | Pixel circuit and driving method thereof, display device |
| CN109346010A (en) * | 2018-12-26 | 2019-02-15 | 昆山国显光电有限公司 | A kind of pixel circuit and its driving method, display device |
| WO2020233491A1 (en) * | 2019-05-17 | 2020-11-26 | 京东方科技集团股份有限公司 | Pixel circuit and drive method therefor, array substrate, and display device |
| CN109979394A (en) * | 2019-05-17 | 2019-07-05 | 京东方科技集团股份有限公司 | Pixel circuit and its driving method, array substrate and display device |
| US11232749B2 (en) | 2019-05-17 | 2022-01-25 | Ordos Yuansheng Optoelectronics Co., Ltd. | Pixel circuit and driving method thereof, array substrate, and display device |
| CN110010058A (en) * | 2019-05-20 | 2019-07-12 | 京东方科技集团股份有限公司 | Array substrate and display panel |
| CN110738964A (en) * | 2019-10-29 | 2020-01-31 | 京东方科技集团股份有限公司 | Pixel circuit and display device |
| CN111164669A (en) * | 2019-12-19 | 2020-05-15 | 重庆康佳光电技术研究院有限公司 | Electroluminescent display, pixel compensation circuit and voltage compensation method thereof |
| CN111951730A (en) * | 2020-08-21 | 2020-11-17 | Oppo（重庆）智能科技有限公司 | Display device, electronic device, display control method, and storage medium |
| CN111951730B (en) * | 2020-08-21 | 2022-04-15 | Oppo（重庆）智能科技有限公司 | Display device, electronic device, display control method, and storage medium |
| CN114582289A (en) * | 2022-04-21 | 2022-06-03 | 武汉天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN114582289B (en) * | 2022-04-21 | 2023-07-28 | 武汉天马微电子有限公司 | Display panel, driving method thereof and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016050021A1 (en) | 2016-04-07 |
| CN104318894B (en) | 2017-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104318894B (en) | Pixel circuit driving method | |
| US10916198B2 (en) | Electronic display with hybrid in-pixel and external compensation | |
| US9620062B2 (en) | Pixel circuit, driving method thereof and display apparatus | |
| US10332447B2 (en) | Pixel circuit, driving method therefor, and display device including the pixel circuit | |
| US9881550B2 (en) | Pixel circuit, driving method thereof, and display apparatus | |
| US10204558B2 (en) | Pixel circuit, driving method thereof, and display apparatus | |
| JP5063433B2 (en) | Display device | |
| US9269304B2 (en) | Pixel circuit for organic light emitting display and driving method thereof, organic light emitting display | |
| CN104680980B (en) | Pixel driving circuit, driving method thereof and display device | |
| EP2804170B1 (en) | Pixel circuit and drive method therefor | |
| JP6117232B2 (en) | Pixel unit driving circuit and method, pixel unit, and display device | |
| US10283042B2 (en) | Pixel driving circuit, pixel driving method, and display device | |
| US9852685B2 (en) | Pixel circuit and driving method thereof, display apparatus | |
| CN103544917B (en) | Light-emitting diode pixel element circuit, its driving method and display panel | |
| CN105575327B (en) | A kind of image element circuit, its driving method and organic EL display panel | |
| CN103198794A (en) | Pixel circuit, drive method, organic luminance display panel and display device thereof | |
| US11341911B2 (en) | Pixel circuit, driving method thereof and display device | |
| CN108389551B (en) | Pixel circuit, driving method thereof and display device | |
| CN110675829B (en) | Pixel driving circuit, driving method thereof, display panel and display device | |
| CN104021762B (en) | A kind of image element circuit and its driving method, display device | |
| US20190019456A1 (en) | Amoled pixel driving circuit and amoled pixel driving method | |
| JP5073544B2 (en) | Display device | |
| KR101818462B1 (en) | Driving circuit for organic light emitting diode display and method for driving the same | |
| CN104992668A (en) | Active light-emitting display device pixel circuit and drive method thereof | |
| CN107103882A (en) | A kind of image element circuit, its driving method and display panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |