WO2016161887A1 - 像素驱动电路、像素驱动方法和显示装置 - Google Patents
像素驱动电路、像素驱动方法和显示装置 Download PDFInfo
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- 239000003990 capacitor Substances 0.000 claims abstract description 26
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- 239000010409 thin film Substances 0.000 description 7
- 229920001621 AMOLED Polymers 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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- 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
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- 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]
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- 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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Definitions
- the present invention relates to the field of display technologies, and in particular, to a pixel driving circuit, a pixel driving method, and a display device.
- AMOLED Active Matrix Organic Light Emitting Diode
- the pixel light-emitting device of the AMOLED is an Organic Light-Emitting Diode (OLED).
- OLED Organic Light-Emitting Diode
- the AMOLED can emit light by driving a thin film transistor to generate a driving current in a saturated state, and the driving current drives the OLED to emit light.
- 1 is a schematic structural diagram of a basic pixel driving circuit in the prior art. As shown in FIG. 1, the conventional basic pixel driving circuit adopts a 2T1C circuit, and the 2T1C circuit includes two thin film transistors (switching transistor T0 and driving transistor DTFT). ) and 1 storage capacitor C.
- the uniformity of the threshold voltage Vth between the respective driving transistors DTFT on the display substrate is poor, and drift occurs during use, so that when the scan line Scan controls the switch When T0 is turned on to input the same data voltage Vdata to the respective driving transistors DTFT, different driving currents are generated due to different threshold voltages of the respective driving transistors DTFT, resulting in poor brightness uniformity of the AMOLED panel.
- the OLED will gradually age, which will cause the display brightness of the OLED to attenuate, thus affecting the user's use.
- embodiments of the present invention provide a pixel driving method, a pixel driving method, and a display device, which can effectively eliminate the influence of the threshold voltage of the driving transistor on the driving current of the light emitting device.
- an embodiment of the present invention provides a pixel driving circuit, including: a reset unit, a threshold compensation unit, a data writing unit, a driving transistor, a first storage capacitor, and a light emitting device, wherein
- a control electrode of the driving transistor and a first end of the first storage capacitor are connected to a first node, a second pole of the driving transistor, a first end of the light emitting device, and a second end of the storage capacitor Connected to the second node, the second end of the light emitting device is connected to the second power source;
- the input end of the reset unit is connected to the third power source, the output end of the reset unit is connected to the second node, and the control end of the reset unit is connected to the fourth control line;
- the first input end of the threshold compensation unit is connected to the first power source, the first output end of the threshold compensation unit is connected to the first pole of the driving transistor, and the first control end and the third end of the threshold compensation unit Controlling a line connection, a second input end of the threshold compensation unit is connected to a fourth power source, a second output end of the threshold compensation unit is connected to the first node, and a second control end of the threshold compensation unit a control line connection;
- the input end of the data writing unit is connected to the data line, the output end of the data writing unit is connected to the first node, and the control end of the data writing unit is connected to the second control line;
- the first power source is for providing a first operating voltage
- the second power source is for providing a second operating voltage
- the third power source is for providing a reset voltage
- the fourth power source is for providing a reference voltage
- the reset unit is configured to write the reset voltage to the second node under the control of the fourth control line during a reset phase
- the threshold compensation unit is configured to write the reference voltage to the first node under control of the first control line and the third control line during a threshold compensation phase, and to apply the reference voltage to the reference voltage Writing a difference in threshold voltages of the driving transistors to the second node;
- the data writing unit is configured to be in the second control line during a data writing phase Controlling, by control, writing a data voltage on the data line to the first node;
- the threshold compensation unit is further configured to write the first working voltage to the first pole of the driving transistor under the control of the third control line during the light emitting phase to turn on the driving transistor to
- the drive current supplied to the light emitting device by the drive transistor is made independent of the threshold voltage of the drive transistor.
- the data writing unit may include: a first switch tube;
- a first pole of the first switch tube is connected to the data line, a second pole of the first switch tube is connected to the first node, a control pole of the first switch tube and the second control Wire connection.
- the threshold compensation unit may include: a second switch tube and a third switch tube;
- a first pole of the second switch tube is connected to the fourth power source, a second pole of the second switch tube is connected to the first node, and a control pole of the second switch tube is opposite to the first Control line connection.
- a first pole of the third switch tube is connected to the first power source, a second pole of the third switch tube is connected to a first pole of the driving transistor, and a control pole of the third switch tube The third control line is connected.
- the reset unit may include: a fourth switch tube;
- a first pole of the fourth switch tube is connected to the third power source, a second pole of the fourth switch tube is connected to the second node, and a control pole of the fourth switch tube and the fourth Control line connection.
- the pixel driving circuit may further include: a second storage capacitor;
- the first end of the second storage capacitor is connected to the second node, and the second end of the second storage capacitor is suspended.
- the third power source and the fourth power source may be the same power source, and the power source provides the reference voltage during the threshold compensation phase, in the reset phase, the data writing phase, and the lighting phase The reset voltage is provided.
- the threshold compensation phase may include a first time period and a second time period, and a voltage on the third control line is an off voltage in the first time period and an on time in the second time period a voltage such that the threshold compensation unit is capable of asserting the reference voltage and the driving crystal after the voltage of the first node is stabilized at the reference voltage The difference in threshold voltage of the body tube is written to the second node.
- the second power source and the third power source may be the same power source for providing the second operating voltage.
- an embodiment of the present invention further provides a display device including the above pixel driving circuit.
- the present invention further provides a pixel driving method based on a pixel driving circuit, wherein the pixel driving circuit adopts the above pixel driving circuit, and the pixel driving method includes:
- the reset unit writes the reset voltage to the second node under the control of the fourth control line;
- the threshold compensation unit writes the reference voltage to the first node under control of the first control line and the third control line, and the reference voltage and the driving transistor a difference in threshold voltage is written to the second node;
- the data writing unit writes a data voltage to the first node under the control of the second control line;
- the threshold compensation unit writes the first operating voltage to the first pole of the driving transistor under the control of the third control line to turn on the driving transistor, so that the The drive current supplied by the drive transistor to the light emitting device is independent of the threshold voltage of the drive transistor.
- the driving current generated by the driving transistor is only related to the data voltage and the reference voltage, and is related to the driving transistor.
- the threshold voltage is independent, so that the driving current flowing through the light emitting device can be prevented from being affected by the threshold voltage unevenness and drift, thereby effectively improving the uniformity of the driving current flowing through the light emitting device OLED.
- the driving current is also independent of the first operating voltage and the second operating voltage, the influence of the voltage drop of the first operating voltage and the second operating voltage in the circuit on the driving current can be effectively avoided.
- FIG. 1 is a schematic structural diagram of a basic pixel driving circuit in the prior art
- FIG. 2 is a schematic diagram of a pixel driving circuit according to Embodiment 1 of the present invention.
- FIG. 3 is a schematic diagram of a pixel driving circuit according to Embodiment 1 of the present invention.
- FIG. 4 is a timing chart showing the operation of each control line in the pixel driving circuit shown in FIG. 3;
- FIG. 5 is an equivalent circuit diagram of the pixel driving circuit shown in FIG. 3 in a reset phase
- FIG. 6 is an equivalent circuit diagram of the pixel driving circuit shown in FIG. 3 in a threshold compensation phase
- FIG. 7 is an equivalent circuit diagram of the pixel driving circuit shown in FIG. 3 in a data writing phase
- FIG. 8 is an equivalent circuit diagram of the pixel driving circuit shown in FIG. 3 in a display phase
- FIG. 9 is a schematic diagram of another pixel driving circuit according to Embodiment 1 of the present invention.
- FIG. 10 is an operation timing chart of each control line and a fourth power source in the pixel driving circuit shown in FIG. 9;
- FIG. 11 is a schematic diagram of still another pixel driving circuit according to Embodiment 1 of the present invention.
- FIG. 12 is a flowchart of a pixel driving method according to Embodiment 2 of the present invention.
- FIG. 2 is a schematic diagram of the pixel driving circuit.
- the pixel driving circuit includes: a reset unit 1, a threshold compensation unit 2, a data writing unit 3, a driving transistor DTFT, a first storage capacitor C1, and a light emitting device OLED.
- the gate (ie, the gate) of the driving transistor DTFT is coupled to the first node A of the first storage capacitor C1, the second terminal of the driving transistor DTFT, the first terminal of the light emitting device OLED, and the first
- the second end of the storage capacitor C1 is connected to the second node B, and the second end of the light emitting device OLED is connected to the second power source;
- the input end of the reset unit 1 is connected to the third power source, and the output end of the reset unit 1 is
- the two-node B is connected, and the control end of the reset unit 1 is connected to a fourth control line (not shown in FIG.
- the first input end of the threshold compensation unit 2 is connected to the first power source, and the first output of the threshold compensation unit 2 End and drive
- the first terminal of the threshold transistor compensation unit 2 is connected to the third control line (not shown in FIG. 2), and the second input end of the threshold compensation unit 2 is connected to the fourth power source, and the threshold compensation is performed.
- the second output end of the unit 2 is connected to the first node A, and the second control end of the threshold compensation unit 2 is connected to the first control line (not shown in FIG. 2); the input end of the data writing unit 3 is connected to the data line
- the output of the data writing unit 3 is connected to the first node A, and the control terminal of the data writing unit 3 is connected to a second control line (not shown in FIG. 2).
- the first power source is for providing a first operating voltage
- the second power source is for providing a second operating voltage
- the third power source is for providing a reset voltage
- the fourth power source is for providing a reference voltage
- the reset unit 1 is for writing a reset voltage to the second node B under the control of the fourth control line during the reset phase.
- the threshold compensation unit 2 is configured to write a reference voltage to the first node A under the control of the first control line and the third control line during the threshold compensation phase, and write the difference between the reference voltage and the threshold voltage of the driving transistor DTFT To the second node B.
- the data writing unit 3 is for writing the data voltage on the data line to the first node A under the control of the second control line at the data writing stage.
- the threshold compensation unit 2 is further configured to write a first operating voltage to the first electrode of the driving transistor DTFT under the control of the third control line during the light emitting phase to turn on the driving transistor DTFT, so that the driving transistor DTFT is directed to the light emitting device
- the driving current provided by the OLED is independent of the threshold voltage of the driving transistor DTFT.
- FIG. 3 is a schematic diagram of a pixel driving circuit according to Embodiment 1 of the present invention.
- the data writing unit 3 includes a first switching transistor T1
- the threshold compensation unit 2 includes a second switching transistor T2 and a third switching transistor T3
- the reset unit 1 includes a fourth switching transistor T4.
- the first pole of the first switching transistor T1 is connected to the data line
- the second pole of the first switching transistor T1 is connected to the first node A
- the control pole of the first switching transistor T1 is connected to the second control line S2.
- the first pole of the second switch tube T2 is connected to the fourth power source for providing the reference voltage Vref
- the second pole of the second switch tube T2 is connected to the first node A
- the second switch tube T2 The control electrode is connected to the first control line S1.
- the first pole of the third switching transistor T3 is connected to a first power source for providing a first operating voltage (for example, Vdd shown in FIG. 3), the second pole of the third switching transistor T3 and the first pole of the driving transistor DTFT Connected, the control pole of the third switching transistor T3 is connected to the third control line S3.
- a first operating voltage for example, Vdd shown in FIG. 3
- the first pole of the fourth switching transistor T4 is connected to the third power source for providing the reset voltage Vsus
- the second pole of the fourth switching transistor T4 is connected to the second node B
- the control pole and the fourth pole of the fourth switching transistor T4 Control line S4 is connected.
- the OLED is taken as an example, but the illuminating device may also be other current illuminating devices, such as LEDs (Light Emitting Diodes). Wait.
- the driving transistor DTFT, the first switching transistor T1, the second switching transistor T2, the third switching transistor T3, and the fourth switching transistor T4 in this embodiment may be a polysilicon thin film transistor, an amorphous silicon thin film transistor, an oxide film. Any of a transistor and an organic thin film transistor.
- control electrode referred to in this embodiment specifically refers to the gate of the transistor
- first pole specifically refers to the source of the transistor
- second pole specifically refers to the drain of the transistor.
- first pole and second pole are interchangeable.
- the driving transistor DTFT, the first switching transistor T1, the second switching transistor T2, the third switching transistor T3, and the fourth switching transistor T4 are all N-type thin film transistors as an example.
- the first working voltage is a high level voltage VDD
- the high level voltage VDD can be about 10V
- the second working voltage is a ground voltage Vss
- the ground voltage Vss can be about OV
- the reference voltage Vref It can be around 2V
- the reset voltage Vsus can be between -4V and -5V.
- the driving transistor DTFT when the driving transistor DTFT, the first switching transistor T1, the second switching transistor T2, the third switching transistor T3, and the fourth switching transistor T4 are all N-type thin film transistors, each switching transistor in the pixel driving circuit And the drive transistor DTFT can use the same life
- the production process is prepared at the same time, which simplifies the production process and shortens the production cycle.
- the operation process of the pixel driving circuit includes four phases: a reset phase, a threshold compensation phase, a data writing phase, and a display phase.
- the first control line S1 outputs a high level signal
- the second control line S2 outputs a low level signal
- the third control line S3 outputs a low level signal
- the fourth control line S4 outputs a high level signal.
- the second switching transistor T2 and the fourth switching transistor T4 are turned on, and the first switching transistor T1 and the third switching transistor T3 are turned off.
- FIG. 5 is an equivalent circuit diagram of the pixel driving circuit shown in FIG. 3 in a reset phase.
- the reference voltage Vref is written to the first node A through the second switching transistor T2
- the reset voltage Vsus is passed through the fourth switching transistor.
- T4 is written to the second node B, thereby completing the reset of the pixel driving circuit.
- the voltage of the first node A is the reference voltage Vref
- the voltage of the second node B is the reset voltage Vsus.
- the first control line S1 outputs a high level signal
- the second control line S2 outputs a low level signal
- the third control line S3 outputs a high level signal
- the fourth control line S4 outputs a low level signal.
- the second switching transistor T2 and the third switching transistor T3 are turned on, and the first switching transistor T1 and the fourth switching transistor T4 are turned off.
- FIG. 6 is an equivalent circuit diagram of the pixel driving circuit shown in FIG. 3 in a threshold compensation phase.
- the voltage of the first node A is maintained at the reference voltage Vref.
- the third switching transistor T3 since the third switching transistor T3 is turned on, the first operating voltage Vdd starts to charge the second node B through the driving transistor DTFT, and when the gate-source voltage Vgs of the driving transistor DTFT is equal to Vth, the driving transistor DTFT is turned off. The charging is over.
- the voltage of the second node B is Vref-Vth, where Vth is the threshold voltage of the driving transistor.
- the first control line S1 outputs a low level signal
- the second control line S2 outputs a high level signal
- the third control line S3 outputs a low level signal
- the fourth control line S4 outputs a low level signal.
- the first switch tube T1 is turned on, and the second switch tube T2, the third switch tube T3, and the fourth switch tube T4 are both turned off.
- FIG. 7 is an equivalent circuit diagram of the pixel driving circuit shown in FIG. 3 in a data writing phase, As shown in FIG. 7, since the second switching transistor T2 is turned off and the first switching transistor T1 is turned on, the data voltage Vdata is written to the first node A through the first switching transistor T1, and the voltage of the first node A is controlled by the reference voltage Vref. Jumping to the data voltage Vdata, that is, the voltage of the first end of the first storage capacitor C1 is hopped by the magnitude of Vdata-Vref. At this time, the voltage of the second end of the first storage capacitor C1 is correspondingly generated by the bootstrap action. Jumping. Wherein, the voltage jump of the second end of the first storage capacitor C1 becomes:
- ⁇ is the voltage jump constant, in the circuit shown in Figure 3.
- the C OLED is the capacitance value of the light emitting device OLED itself.
- the voltage of the first node A is the data voltage Vdata
- the voltage of the second node B is Vref-Vth + ⁇ (Vdata - Vref).
- the first control line S1 outputs a low level signal
- the second control line S2 outputs a low level signal
- the third control line S3 outputs a high level signal
- the fourth control line S4 outputs a low level signal.
- the third switch tube T3 is turned on, and the first switch tube T1, the second switch tube T2, and the fourth switch tube T4 are both turned off.
- FIG. 8 is an equivalent circuit diagram of the pixel driving circuit shown in FIG. 3 in the display phase. As shown in FIG. 8, since the third switching transistor T3 is turned on, the first power supply supplies the driving transistor DTFT with the first operating voltage Vdd, thereby The drive transistor DTFT is also in operation.
- K and ⁇ are constants, and Vgs is the gate-source voltage of the driving transistor DTFT.
- the driving current I of the driving transistor DTFT is only related to the data voltage Vdata and the reference voltage Vref regardless of the threshold voltage Vth of the driving transistor DTFT, so that the driving current flowing through the light emitting device OLED can be prevented from being subjected to the threshold voltage unevenness and The effect of drift, which in turn effectively increases the uniformity of the drive current flowing through the OLED of the light-emitting device.
- the driving current is also independent of the first operating voltage Vdd and the second operating voltage Vss, the first operating voltage Vdd and the second operating voltage can be effectively avoided. The effect of Vss voltage drop in the circuit on the drive current.
- FIG. 9 is a detailed schematic diagram of another pixel driving circuit in the first embodiment of the present invention
- FIG. 10 is a timing chart showing the operation of each control line and the fourth power source in the pixel driving circuit shown in FIG.
- the difference between the pixel driving circuit shown in FIG. 9 and the pixel driving circuit shown in FIG. 3 is that the first pole of the fourth switching transistor T4 in the pixel driving circuit shown in FIG. 9 is connected to the fourth power source, that is, the third power source.
- the fourth power supply provides a reference voltage Vref (corresponding to a high level on the fourth power supply in FIG.
- the fourth power source causes instantaneous power consumption when switching between the reference voltage and the reset voltage, since the difference between the absolute value of the reference voltage and the absolute value of the reset voltage is small, Instantaneous power consumption is also relatively small.
- the threshold compensation phase may include a first time period and a second time period.
- the third control line S3 first maintains a low level signal in the first time period, and then A high level signal is output during the second period.
- the working process of the pixel driving circuit shown in FIG. 9 is similar to the working process of the pixel driving circuit shown in FIG. 3 .
- FIG. 11 is a schematic diagram of still another pixel driving circuit according to Embodiment 1 of the present invention; Figure.
- the difference between the pixel driving circuit shown in FIG. 11 and the pixel driving circuit shown in FIG. 3 is that the first pole of the fourth switching transistor T4 in the pixel driving circuit shown in FIG. 11 is connected to the second power source, that is, the second power source.
- the third power source is the same power source (second power source), and the second power source continuously outputs the second working voltage Vss. Since the pixel driving circuit shown in FIG. 11 eliminates the third power supply, the corresponding power supply line (Power Line) can be omitted for the pixel driving circuit, thereby effectively reducing the wiring space.
- Power Line Power Line
- the pixel driving circuit further includes a second storage capacitor C2, wherein the second The first end of the storage capacitor C2 is connected to the second node B, and the second end of the second storage capacitor C2 is suspended.
- the pixel driving circuit provided in this embodiment that there are many devices connected at the second node B, so that leakage current is easily generated, so that the voltage of the second node B is unstable.
- the second storage capacitor C2 at the second node B, the voltage of the second node B can be stabilized, thereby ensuring that the driving current generated by the driving transistor is more stable.
- FIG. 12 is a flow chart of the pixel driving method.
- the pixel driving method is based on a pixel driving circuit, and the pixel driving circuit adopts any one of the pixel driving circuits provided in the first embodiment. As shown in FIG. 12, the pixel driving method includes the following steps 101-104.
- Step 101 The reset unit writes a reset voltage to the second node under the control of the fourth control line.
- Step 102 The threshold compensation unit writes a reference voltage to the first node under the control of the first control line and the third control line, and writes a difference between the reference voltage and the threshold voltage of the driving transistor to the second node.
- Step 103 The data writing unit writes the data voltage to the first node under the control of the second control line.
- Step 104 The threshold compensation unit writes the first working voltage to the first pole of the driving transistor under the control of the third control line to turn on the driving transistor, so that the driving current provided by the driving transistor to the light emitting device and the driving transistor are The threshold voltage is independent.
- Steps 101 to 104 respectively correspond to four working phases of the pixel driving circuit: a reset phase, a threshold compensation phase, a data writing phase, and an illumination phase.
- a reset phase a threshold compensation phase
- a data writing phase a data writing phase
- an illumination phase a threshold compensation phase
- Embodiment 2 of the present invention provides a pixel driving method, which can make a driving current of a driving transistor only related to a data voltage and a reference voltage and independent of a threshold voltage of a driving transistor, thereby avoiding driving through a light emitting device.
- the current is affected by the threshold voltage non-uniformity and drift, thereby effectively improving the uniformity of the driving current flowing through the light emitting device OLED.
- the driving current is also independent of the first operating voltage and the second operating voltage, the influence of the voltage drop of the first operating voltage and the second operating voltage in the circuit on the driving current can be effectively avoided.
- a third embodiment of the present invention provides a display device.
- the display device includes a plurality of pixel units, and each of the pixel units is correspondingly provided with a pixel driving circuit.
- the pixel driving circuit can adopt the pixel driving circuit in the first embodiment.
- the pixel driving circuit can be operated by the pixel driving method provided in the second embodiment.
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Abstract
Description
Claims (10)
- 一种像素驱动电路,包括:重置单元、阈值补偿单元、数据写入单元、驱动晶体管、第一存储电容和发光器件,其中,所述驱动晶体管的控制极与所述第一存储电容的第一端连接于第一节点,所述驱动晶体管的第二极、所述发光器件的第一端和所述第一存储电容的第二端连接于第二节点,所述发光器件的第二端与第二电源连接;所述重置单元的输入端与第三电源连接,所述重置单元的输出端与所述第二节点连接,所述重置单元的控制端与第四控制线连接;所述阈值补偿单元的第一输入端与第一电源连接,所述阈值补偿单元的第一输出端与所述驱动晶体管的第一极连接,所述阈值补偿单元的第一控制端与第三控制线连接,所述阈值补偿单元的第二输入端与第四电源连接,所述阈值补偿单元的第二输出端与所述第一节点连接,所述阈值补偿单元的第二控制端与第一控制线连接;所述数据写入单元的输入端与数据线连接,所述数据写入单元的输出端与所述第一节点连接,所述数据写入单元的控制端与第二控制线连接;所述第一电源用于提供第一工作电压,所述第二电源用于提供第二工作电压,所述第三电源用于提供重置电压,所述第四电源用于提供参考电压;所述重置单元用于在重置阶段时在所述第四控制线的控制下将所述重置电压写入至所述第二节点;所述阈值补偿单元用于在阈值补偿阶段时在所述第一控制线和第三控制线的控制下将所述参考电压写入至所述第一节点,以及将所述参考电压与所述驱动晶体管的阈值电压的差写入至所述第二节点;所述数据写入单元用于在数据写入阶段时在所述第二控制线的控制下将所述数据线上的数据电压写入至所述第一节点;所述阈值补偿单元还用于在发光阶段时在所述第三控制线的控制下将所述第一工作电压写入至所述驱动晶体管的第一极,以导通所 述驱动晶体管,以使得所述驱动晶体管向所述发光器件提供的驱动电流与所述驱动晶体管的阈值电压无关。
- 根据权利要求1所述的像素驱动电路,其中,所述数据写入单元包括:第一开关管;所述第一开关管的第一极与所述数据线连接,所述第一开关管的第二极与所述第一节点连接,所述第一开关管的控制极与所述第二控制线连接。
- 根据权利要求1所述的像素驱动电路,其中,所述阈值补偿单元包括:第二开关管和第三开关管;所述第二开关管的第一极与所述第四电源连接,所述第二开关管的第二极与所述第一节点连接,所述第二开关管的控制极与所述第一控制线连接;所述第三开关管的第一极与所述第一电源连接,所述第三开关管的第二极与所述驱动晶体管的第一极连接,所述第三开关管的控制极与所述第三控制线连接。
- 根据权利要求1所述的像素驱动电路,其中,所述重置单元包括:第四开关管;所述第四开关管的第一极与所述第三电源连接,所述第四开关管的第二极与所述第二节点连接,所述第四开关管的控制极与所述第四控制线连接。
- 根据权利要求1-4中任一所述的像素驱动电路,还包括:第二存储电容;所述第二存储电容的第一端与所述第二节点连接,所述第二存储电容的第二端悬空。
- 根据权利要求1所述的像素驱动电路,其中,所述第三电源 和所述第四电源为同一个电源,该电源在所述阈值补偿阶段时提供所述参考电压,在所述重置阶段、所述数据写入阶段和所述发光阶段时提供所述重置电压。
- 根据权利要求6所述的像素驱动电路,其中,所述阈值补偿阶段包括第一时间段和第二时间段,并且所述第三控制线上的电压在所述第一时间段中为关断电压而在所述第二时间段中为开启电压,以使得所述阈值补偿单元在所述第一节点的电压稳定在所述参考电压之后才能够将所述参考电压与所述驱动晶体管的阈值电压的差写入至所述第二节点。
- 根据权利要求1所述的像素驱动电路,其中,所述第二电源和所述第三电源为同一个电源,该电源用于提供所述第二工作电压。
- 一种显示装置,包括:如权利要求1-8中任一所述的像素驱动电路。
- 一种像素驱动方法,其基于像素驱动电路,所述像素驱动电路采用上述权利要求1-8中任一所述的像素驱动电路,所述像素驱动方法包括:在重置阶段,所述重置单元在所述第四控制线的控制下将所述重置电压写入至所述第二节点;在阈值补偿阶段,所述阈值补偿单元在所述第一控制线和第三控制线的控制下将所述参考电压写入至所述第一节点,以及将所述参考电压与所述驱动晶体管的阈值电压的差写入至所述第二节点;在数据写入阶段,所述数据写入单元在所述第二控制线的控制下将数据电压写入至所述第一节点;在发光阶段,所述阈值补偿单元在所述第三控制线的控制下将所述第一工作电压写入至所述驱动晶体管的第一极,以导通所述驱动晶体管,以使得所述驱动晶体管向所述发光器件提供的驱动电流与所 述驱动晶体管的阈值电压无关。
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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Families Citing this family (34)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111445850A (zh) * | 2020-04-30 | 2020-07-24 | 京东方科技集团股份有限公司 | 一种像素电路及其驱动方法及显示装置及其驱动方法 |
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CN111564140B (zh) * | 2020-06-12 | 2021-03-26 | 京东方科技集团股份有限公司 | 显示基板及显示装置 |
KR102662235B1 (ko) * | 2020-11-12 | 2024-05-02 | 엘지디스플레이 주식회사 | 전계발광 표시장치 |
JP7641746B2 (ja) * | 2021-01-21 | 2025-03-07 | キヤノン株式会社 | 発光装置、光電変換装置、電子機器、照明装置及び移動体 |
CN115331609B (zh) * | 2022-10-12 | 2023-01-10 | 昆山国显光电有限公司 | 像素电路及其驱动方法 |
CN115775534A (zh) * | 2022-11-24 | 2023-03-10 | 惠科股份有限公司 | 像素驱动电路、时序控制方法和显示面板 |
CN116741101A (zh) * | 2023-06-30 | 2023-09-12 | 惠科股份有限公司 | 像素驱动电路、显示面板及显示装置 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004069816A (ja) * | 2002-08-02 | 2004-03-04 | Nec Corp | 電流駆動回路および画像表示装置 |
CN101325022A (zh) * | 2007-06-13 | 2008-12-17 | 索尼株式会社 | 显示装置、用于显示装置的驱动方法以及电子装置 |
CN101989404A (zh) * | 2009-08-03 | 2011-03-23 | 三星移动显示器株式会社 | 有机发光显示器及其驱动方法 |
CN103440840A (zh) * | 2013-07-15 | 2013-12-11 | 北京大学深圳研究生院 | 一种显示装置及其像素电路 |
CN104050916A (zh) * | 2014-06-04 | 2014-09-17 | 上海天马有机发光显示技术有限公司 | 一种有机发光显示器的像素补偿电路及方法 |
CN104464624A (zh) * | 2014-12-10 | 2015-03-25 | 友达光电股份有限公司 | 主动矩阵有机发光二极管显示器的像素补偿电路 |
CN104715726A (zh) * | 2015-04-07 | 2015-06-17 | 合肥鑫晟光电科技有限公司 | 像素驱动电路、像素驱动方法和显示装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005099715A (ja) * | 2003-08-29 | 2005-04-14 | Seiko Epson Corp | 電子回路の駆動方法、電子回路、電子装置、電気光学装置、電子機器および電子装置の駆動方法 |
KR20060054603A (ko) * | 2004-11-15 | 2006-05-23 | 삼성전자주식회사 | 표시 장치 및 그 구동 방법 |
KR100719924B1 (ko) * | 2005-04-29 | 2007-05-18 | 비오이 하이디스 테크놀로지 주식회사 | 유기 전계발광 표시장치 |
JP2008233501A (ja) * | 2007-03-20 | 2008-10-02 | Sony Corp | 有機エレクトロルミネッセンス発光部の駆動方法 |
KR100922065B1 (ko) * | 2008-06-11 | 2009-10-19 | 삼성모바일디스플레이주식회사 | 화소 및 이를 이용한 유기전계발광 표시장치 |
KR101074811B1 (ko) * | 2010-01-05 | 2011-10-19 | 삼성모바일디스플레이주식회사 | 화소 회로, 유기전계발광 표시 장치 및 이의 구동 방법 |
TWI415076B (zh) * | 2010-11-11 | 2013-11-11 | Au Optronics Corp | 有機發光二極體之像素驅動電路 |
CN103839520B (zh) * | 2014-02-28 | 2017-01-18 | 京东方科技集团股份有限公司 | 像素电路及其驱动方法、显示面板和显示装置 |
-
2015
- 2015-04-07 CN CN201510160950.5A patent/CN104715726A/zh active Pending
-
2016
- 2016-03-21 US US15/322,471 patent/US10242625B2/en active Active
- 2016-03-21 WO PCT/CN2016/076841 patent/WO2016161887A1/zh active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004069816A (ja) * | 2002-08-02 | 2004-03-04 | Nec Corp | 電流駆動回路および画像表示装置 |
CN101325022A (zh) * | 2007-06-13 | 2008-12-17 | 索尼株式会社 | 显示装置、用于显示装置的驱动方法以及电子装置 |
CN101989404A (zh) * | 2009-08-03 | 2011-03-23 | 三星移动显示器株式会社 | 有机发光显示器及其驱动方法 |
CN103440840A (zh) * | 2013-07-15 | 2013-12-11 | 北京大学深圳研究生院 | 一种显示装置及其像素电路 |
CN104050916A (zh) * | 2014-06-04 | 2014-09-17 | 上海天马有机发光显示技术有限公司 | 一种有机发光显示器的像素补偿电路及方法 |
CN104464624A (zh) * | 2014-12-10 | 2015-03-25 | 友达光电股份有限公司 | 主动矩阵有机发光二极管显示器的像素补偿电路 |
CN104715726A (zh) * | 2015-04-07 | 2015-06-17 | 合肥鑫晟光电科技有限公司 | 像素驱动电路、像素驱动方法和显示装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3625790A4 (en) * | 2017-05-16 | 2020-12-23 | Boe Technology Group Co. Ltd. | PIXEL CIRCUIT, METHOD FOR CONTROLLING THE PIXEL CIRCUIT AND DISPLAY DEVICE |
CN112398315A (zh) * | 2020-11-23 | 2021-02-23 | 深圳市必易微电子股份有限公司 | 同步整流控制电路和功率变换器 |
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