CN110111723A - Pixel circuit and its driving method, display panel - Google Patents

Pixel circuit and its driving method, display panel Download PDF

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Publication number
CN110111723A
CN110111723A CN201910528154.0A CN201910528154A CN110111723A CN 110111723 A CN110111723 A CN 110111723A CN 201910528154 A CN201910528154 A CN 201910528154A CN 110111723 A CN110111723 A CN 110111723A
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CN
China
Prior art keywords
node
module
signal
control
pixel circuit
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Pending
Application number
CN201910528154.0A
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Chinese (zh)
Inventor
晏荣建
余兆伟
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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Priority to CN201910528154.0A priority Critical patent/CN110111723A/en
Publication of CN110111723A publication Critical patent/CN110111723A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • 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]
    • 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
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/3433—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 by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
    • G09G3/344—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 by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3685—Details of drivers for data electrodes

Abstract

This application discloses a kind of pixel circuit and its driving methods, display panel, belong to field of display technology.Pixel circuit includes: that the first Data write. module is used under the control of the gate drive signal from gate drive signal end, provides the data-signal from data signal end to first node；The current potential that memory module is used to control second node follows the synchronous variation of the current potential of first node；Drive module is used under the control of second node and gate drive signal, provides the first power supply signal from the first power end to third node and second node；Light emitting control module is used under the control of the first control signal from first control signal end, provides the signal from third node to light emitting module；Photosensitive module is used for the optical signal in detection pixel circuit local environment, and the current potential of second node is controlled according to optical signal.The application improves the display performance of display panel.

Description

Pixel circuit and its driving method, display panel
Technical field
This application involves field of display technology, in particular to a kind of pixel circuit and its driving method, display panel.
Background technique
Display panel generally includes multiple pixel units, and each pixel unit includes luminescent device and is used for luminescent device There is provided electric current pixel circuit, pixel circuit at least with data signal end, gate drive signal end and the power supply in display device End connection.
In the related technology, gate drive signal is provided to pixel circuit by gate drive signal end, it can be to pixel electricity The charging process on road is controlled.The data-signal and power supply that the charging voltage of the pixel circuit is exported according to the data signal end The power supply signal of end output determines.Also, the electric current that the light emission luminance of luminescent device is provided based on pixel circuit to luminescent device Size determine that the size of the electric current is determined based on the charging voltage of pixel circuit.
But the amplitude of data-signal determines that power supply signal is usually steady state value, is led generally according to the grayscale of display image Causing can not be according to the light emission luminance of different light intensity environment adjusting luminescent device, and the display performance of display panel is poor.
Summary of the invention
This application provides a kind of pixel circuit and its driving methods, display panel, in the related technology can not can solve The light emission luminance of luminescent device, the poor problem of the display performance of display panel, the skill are adjusted according to different light intensity environment Art scheme is as follows:
In a first aspect, providing a kind of pixel circuit, the pixel circuit includes: the first Data write. module, storage mould Block, drive module, light emitting control module and photosensitive module；
First Data write. module is connect with gate drive signal end, data signal end and first node respectively, is used Under the control in the gate drive signal from the gate drive signal end, Xiang Suoshu first node, which provides, comes from the number According to the data-signal of signal end；
The memory module is connect with the first node and second node respectively, for controlling the electricity of the second node Position follows the synchronous variation of the current potential of the first node；
The drive module respectively with the gate drive signal end, the second node, the first power end and third section Point connection, under the control of the second node and the gate drive signal, Xiang Suoshu third node and described second Node provides the first power supply signal from first power end；
The light emitting control module respectively with the luminous mould in first control signal end, the third node and pixel unit Block connection, under the control of the first control signal from the first control signal end, Xiang Suoshu light emitting module to be provided Signal from the third node；
The photosensitive module is located on the access of the second node input signal, and the photosensitive module is for detecting institute The optical signal in pixel circuit local environment is stated, and controls the current potential of the second node according to the optical signal.
Optionally, the drive module includes: the first driven submodule and the second driven submodule；
First driven submodule connects with the second node, first power end and the third node respectively It connects, under the control of the second node, Xiang Suoshu third node to provide the first power supply from first power end Signal；
Second driven submodule respectively with the gate drive signal end, the second node and the photosensitive module One end connection, under the control of the gate drive signal, Xiang Suoshu second node, which provides, comes from the photosensitive module Signal；
The other end of the photosensitive module is connect with the third node.
Optionally, the photosensitive module and first Data write. module are connected on the data signal end and described the Between one node.
Optionally, the pixel circuit further include: the second Data write. module；
Second Data write. module is connect with second control signal end, second source end and first node respectively, is used Under the control in the second control signal from the second control signal end, Xiang Suoshu first node is provided from described the The second source signal of two power ends；
The photosensitive module and second Data write. module are connected on the second source end and the first node Between.
Optionally, the photosensitive module includes: first resistor and light-sensitive element in parallel.
Optionally, the pixel circuit further include: reseting module；
The reseting module is connect with reset signal end, third power end and the second node respectively, for coming from Under the control of the reset signal at the reset signal end, Xiang Suoshu second node provides the third electricity from the third power end Source signal.
Second aspect, provides a kind of driving method of pixel circuit, and the pixel circuit includes: the first data write-in mould Block, memory module, drive module, light emitting control module and photosensitive module, which comprises charging stage and light emitting phase；
In the charging stage, the gate drive signal of gate drive signal end output is significant level, and the first power end is defeated The first power supply signal out is significant level, and the data-signal of data signal end output is significant level, and first data are write Enter module under the control of the gate drive signal, provides the data-signal, the memory module control to first node The current potential of second node follows the potential change of the first node, and, control of the drive module in the second node Under system, first power supply signal is provided to third node, and the photosensitive module detects in the pixel circuit local environment Optical signal, the drive module is also under the control of the gate drive signal, by the photosensitive module to described second Node provides the signal from the third node；
In light emitting phase, the first control signal of first control signal end output is significant level, the second node Significant level is remained, for the drive module under the control of the second node, Xiang Suoshu third node provides described first Power supply signal, under the control of the first control signal, the light emitting module into pixel unit mentions the light emitting control module For the signal from the third node.
The third aspect, provides a kind of driving method of pixel circuit, and the pixel circuit includes: the first data write-in mould Block, memory module, drive module, light emitting control module and photosensitive module, which comprises charging stage and light emitting phase；
In the charging stage, the gate drive signal of gate drive signal end output is significant level, and the first power end is defeated The first power supply signal out is significant level, and the data-signal of data signal end output is significant level, the photosensitive module inspection Survey the optical signal in the pixel circuit local environment, control of first Data write. module in the gate drive signal Under, the data-signal, the current potential of the memory module control second node are provided to first node by the photosensitive module The potential change of the first node is followed, and, the drive module is under the control of the second node, to third node First power supply signal is provided, the drive module is also under the control of the gate drive signal, Xiang Suoshu second node Signal from the third node is provided；
In light emitting phase, the first control signal of first control signal end output is significant level, the second node Significant level is remained, for the drive module under the control of the second node, Xiang Suoshu third node provides described first Power supply signal, under the control of the first control signal, the light emitting module into pixel unit mentions the light emitting control module For the signal from the third node.
Fourth aspect, provides a kind of driving method of pixel circuit, and the pixel circuit includes: the first data write-in mould Block, the second Data write. module, memory module, drive module, light emitting control module and photosensitive module, which comprises fill Electric stage and light emitting phase；
In the charging stage, the gate drive signal of gate drive signal end output is significant level, and the first power end is defeated The first power supply signal out is significant level, and the second source signal of second source end output is significant level, data signal end The data-signal of output is significant level, and the second control signal of second control signal end output is significant level, described photosensitive Module detects the optical signal in the pixel circuit local environment, and first Data write. module is in the gate drive signal Control under, provide the data-signal to first node, second Data write. module is in the second control signal Under control, the second source signal is provided to the first node by the photosensitive module, the memory module control the The current potential of two nodes follows the potential change of the first node, and, control of the drive module in the second node Under, provide first power supply signal to third node, the drive module also under the control of the gate drive signal, to The second node provides the signal from the third node；
In light emitting phase, the first control signal of first control signal end output is significant level, the second node Significant level is remained, for the drive module under the control of the second node, Xiang Suoshu third node provides described first Power supply signal, under the control of the first control signal, the light emitting module into pixel unit mentions the light emitting control module For the signal from the third node.
5th aspect, provides a kind of display panel, and the display panel includes: multiple pixel units of array arrangement, Each pixel unit includes: light emitting module and any pixel circuit of first aspect.
Technical solution bring beneficial effect provided by the present application includes at least:
Pixel circuit and its driving method provided in an embodiment of the present invention, display panel, photosensitive module are located to the second section On the access of point input signal, and photosensitive module is able to detect the intensity of light in pixel circuit local environment, and according to the light The current potential of strength control second node so as to light emitting module provide electric current and pixel circuit local environment in light intensity just Correlation, compared to the prior art, the electric current that can be provided according to the intensity adjustment of light in different light intensity environment to light emitting module Size, achieve the effect that adjust luminescent device light emission luminance, improve the display performance of display panel.
Also, since the light-sensitive element in the embodiment of the present invention is arranged in pixel circuit, so that in each pixel unit Pixel circuit can according to the intensity of light, adjust in the pixel unit luminescent device provide driving current size, Therefore, the realization side of the size of the electric current provided to luminescent device is provided compared to the sensor by being arranged in display device Formula improves the precision for adjusting driving current, effectively improves the efficiency for adjusting driving current.
In addition, since the light-sensitive element in the embodiment of the present invention is arranged in pixel circuit, so that without in display device In sensor is additionally set so that display device can have biggish display area, improve the screen accounting of display device.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other Attached drawing.
Fig. 1 is a kind of structural schematic diagram of pixel circuit in the related technology provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of pixel circuit provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of another pixel circuit provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of photosensitive module provided in an embodiment of the present invention；
Fig. 5 to 16 is the structural schematic diagram of pixel circuit provided in an embodiment of the present invention；
Figure 17 is a kind of flow chart of the driving method of pixel circuit provided in an embodiment of the present invention；
Figure 18 is a kind of timing diagram of the driving process of pixel circuit provided in an embodiment of the present invention；
Figure 19 is the flow chart of the driving method of another pixel circuit provided in an embodiment of the present invention；
Figure 20 is the flow chart of the driving method of another pixel circuit provided in an embodiment of the present invention.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with attached drawing to the application embodiment party Formula is described in further detail.
The transistor used in all embodiments of the invention all can be thin film transistor (TFT) or field-effect tube or other characteristics Identical device is mainly switching transistor according to transistor used by effect the embodiment of the present invention in circuit.By It is symmetrical in the source electrode of the switching transistor used here, drain electrode, so its source electrode, drain electrode can be interchanged.In this hair In bright embodiment, wherein it will be known as the first order by source electrode, drain electrode is known as the second level.The centre of transistor is provided by the form in attached drawing End is grid, signal input part is source electrode, signal output end is drain electrode.In addition, switch crystal used by the embodiment of the present invention Pipe may include p-type switching transistor and N-type switching transistor, wherein p-type switching transistor is led when grid is low level It is logical, end when grid is high level, N-type switching transistor is connected when grid is high level, cuts when grid is low level Only.
As known for inventor, electric current that the light emission luminance of luminescent device is provided to luminescent device based on pixel circuit it is big The size of small determination, the electric current is determined based on the charging voltage of pixel circuit.And the charging voltage of pixel circuit is according to the data The data-signal of signal end output and the power supply signal of power end output determine.
Illustratively, Fig. 1 is pixel circuit in the related technology, as shown in Figure 1, the pixel circuit includes: transistor J1, crystalline substance Body pipe J2, transistor J3, transistor J4, transistor J5, transistor J6, transistor J7 and capacitor C.
Wherein, the grid of transistor J1 is connect with node M 2, and the source level of transistor J1 is connect with power end Y1, transistor J1 Drain connect with node M 3；The grid of transistor J2 is connect with gate drive signal end G, the source level and node M 3 of transistor J2 Connection, the drain of transistor J2 are connect with node M 2；The grid of transistor J3 is connect with gate drive signal end G, transistor J3 Source level connect with data signal end D, the drain of transistor J3 is connect with node M 1；The grid of transistor J4 and the second control are believed Number end EM2 connection, the source level of transistor J4 connect with power end Y2, and the drain of transistor J4 is connect with node M 1；Transistor J5 Grid connect with reset signal end RST, the source level of transistor J5 is connect with power end Y2, the drain of transistor J5 and node M 1 Connection；The grid of transistor J6 is connect with first control signal end EM1, and the source level of transistor J6 is connect with node M 3, transistor The drain of J6 and one end of luminescent device connect；The grid of transistor J7 is connect with reset signal end RST, the source level of transistor J7 It is connect with power end Y3, the drain of transistor J7 is connect with node M 2.The first end of capacitor C is connect with node M 1, capacitor C Second end connect with node M 2.
The course of work of the pixel circuit includes: reset phase, charging stage, compensated stage and light emitting phase.It is resetting In stage, transistor J5 is opened, so that the current potential of node M 1 is equal to the current potential Vref of the signal of power end Y2 output, and, it is brilliant Body pipe J7 is opened, so that the current potential of node M 2 is equal to the current potential Vint of the signal of power end Y3 output.In the charging stage, crystal Pipe J3 is opened, so that the current potential of node M 1 is equal to the current potential Vdata of the data-signal of data signal end D output, and, transistor J1 and transistor J2 is opened, so that the current potential of node M 2 is equal to VDD+Vth, which is the current potential of the signal of power end Y1 output, Vth is the cut-in voltage of transistor J1.In compensated stage, transistor J4 is opened, so that the current potential of node M 1 is equal to power end The current potential Vref of the signal of Y2 output, at this point, the current potential of node M 2 becomes Vref+ (VDD+ under the coupling of capacitor C Vth-Vdata).In light emitting phase, under the action of node M 2, to the driving current I of luminescent device offerd=0.5 × K × (Vgs-Vth)2=0.5 × K × [(Vref+ (VDD+Vth-Vdata)-VDD)-Vth]2=0.5 × K × (Vref-Vdata)2。 Wherein, Vgs is the voltage difference between the grid and source electrode of transistor J1, and μ indicates the electron mobility of transistor J1, CoxIndicate brilliant The capacitor of body pipe J1 unit conducting channel breadth length ratio, W/L indicate the breadth length ratio of the conducting channel of transistor J1.
According to the formula it is found that the size for the electric current that pixel circuit is provided to luminescent device is according to power supply signal Vref sum number It is believed that number determination, and the voltage of data-signal is determined generally according to the grayscale of display image, the amplitude of power supply signal Vref is usual For steady state value, therefore, no matter the light of display device local environment intensity it is much, the electric current that pixel circuit luminescent device provides Size will not usually change, and cause the light emission luminance of luminescent device in display device constant, and then lead to not effectively Adjust the light emission luminance of luminescent device.
Although having at present through an included sensor of adjusting use pattern and display device to display device The implementation that brightness is adjusted, still, when adjusting the brightness of display device using this kind of mode, usually according to the sensing The size of the unified adjustment electric current that luminescent device provides in all pixels unit into display device of the signal of device detection, causes pair The Adjustment precision of light emission luminance is lower.In addition, sensor is generally arranged at the display side of display device, which can occupy aobvious Show area, causes the screen of display device to account for smaller.
Fig. 2 is a kind of structural schematic diagram of pixel circuit provided in an embodiment of the present invention.As shown in Fig. 2, pixel circuit 1 wraps It includes: the first Data write. module 11, memory module 12, drive module 13, light emitting control module 14 and photosensitive module 15.
First Data write. module 11 is connect with gate drive signal end G, data signal end D and first node 31 respectively, For being provided to first node 31 and coming from data-signal under the control of the gate drive signal from gate drive signal end G Hold the data-signal of D.
Memory module 12 is connect with first node 31 and second node 32 respectively, for control the current potential of second node 32 with With the synchronous variation of the current potential of first node 31.
Drive module 13 connects with gate drive signal end G, second node 32, the first power end V1 and third node 33 respectively It connects, under the control of second node 32 and gate drive signal, provides to third node 33 and second node 32 from the The first power supply signal of one power end V1.
Light emitting control module 14 respectively with the luminous mould in first control signal end EM1, third node 33 and pixel unit Block 20 connects, for providing to come to light emitting module 20 under the control of the first control signal from first control signal end EM1 From the signal of third node 33.
Photosensitive module 15 is located on the access of 32 input signal of second node, and photosensitive module 15 is used for detection pixel circuit Optical signal in local environment, and according to the current potential of optical signal control second node 32.Wherein, Fig. 2 is that photosensitive module 15 is located at From schematic diagram of the third node 32 on the access of 31 input signal of second node.
Wherein, photosensitive module is able to detect the intensity of the light in pixel circuit local environment, and the electricity at photosensitive module both ends Press the intensity of light in (i.e. the partial pressure of photosensitive module) and pixel circuit local environment negatively correlated.Due to the current potential of second node and this The partial pressure of photosensitive module is negatively correlated, and the current potential of the electric current and the second node provided to light emitting module is positively correlated, so as to hair The intensity of light is positively correlated in the electric current and pixel circuit local environment that optical module provides, and therefore, can be adjusted by photosensitive module The size of current provided in different light intensity environment to light emitting module, so that the brightness of light emitting module is according to the strong of the light in environment Degree changes.
In conclusion pixel circuit provided in an embodiment of the present invention includes photosensitive module, photosensitive module is located to the second section On the access of point input signal, and photosensitive module is able to detect the intensity of light in pixel circuit local environment, and according to the light The current potential of strength control second node so as to light emitting module provide electric current and pixel circuit local environment in light intensity just Correlation, compared to the prior art, the electric current that can be provided according to the intensity adjustment of light in different light intensity environment to light emitting module Size, achieve the effect that adjust luminescent device light emission luminance, improve the display performance of display panel.
Optionally, as shown in Figure 3 and Figure 4, photosensitive module may include: first resistor 151 and light-sensitive element in parallel 152.Wherein, the resistance value of first resistor can determine according to actual needs, illustratively, and the resistance value of first resistor can be 10 ohm Or 12 ohm etc..And the light-sensitive element can be photodiode etc..
Light-sensitive element has the characteristic of one-way conduction, and light-sensitive element works under the action of backward voltage.Illustratively, such as Shown in Fig. 4, light-sensitive element 152 includes p type island region, N-type region, and the PN junction between p type island region and N-type region.When power supply is light When the electric current that quick element 152 provides flows to N-type region by p type island region, the voltage that power supply applies to light-sensitive element 152 is forward voltage, And electric current at this time is forward current；When power supply is that the electric current that provides of light-sensitive element 152 flows to p type island region by N-type region, power supply to The voltage that light-sensitive element 152 applies is backward voltage, and electric current at this time is reverse current.
Also, when applying backward voltage, and the light that is radiated on light-sensitive element 152 to light-sensitive element 152 by power supply When intensity is weaker, the reverse current for flowing to p type island region by N-type region is very small, so that light-sensitive element 152 is in off state, the light The resistance of quick element 152 is close to infinity.When the enhanced strength for the light being radiated on light-sensitive element 152, energy is carried Photon enters PN junction, and gives the energy to the electronics fettered on covalent bond in PN junction, so that part electronics shakes off covalent bond, produces Raw electron-hole pair, the electron-hole pair are properly termed as photo-generated carrier.Photo-generated carrier is under the action of voltage, to close The direction of p type island region moves, and generates biggish reverse current.Also, the intensity for being radiated at the light on light-sensitive element 152 is stronger, should Reverse current is bigger, correspondingly, the region being in light-sensitive element 152 is bigger, so that the resistance of light-sensitive element 152 is got over It is small.It that is to say, the intensity of the light in the resistance of light-sensitive element 152 and the environment being radiated on light-sensitive element 152 is negatively correlated.Cause This, the partial pressure of photo resistance and the intensity of the light in the environment being radiated on light-sensitive element 152 are negatively correlated.
Optionally, the setting position of photosensitive module can have a variety of achievable modes, and the embodiment of the present invention is with following several It is illustrated for the achievable mode of kind.
Photosensitive module the first can in realization mode, as shown in figure 5, drive module 13 include: respectively with the second section The first driven submodule 131 and the second driven submodule 132 of 32 connection of point, and photosensitive module 15 is connected on the second driving submodule Between block 132 and third node 33.
As shown in figure 5, the first driven submodule 131 respectively with second node 32, the first power end V1 and third node 33 Connection, for providing the first power supply signal from the first power end V1 to third node 33 under the control of second node 32. Second driven submodule 132 is connect with one end of gate drive signal end G, second node 32 and photosensitive module 15 respectively, is used for Under the control of gate drive signal, the signal from photosensitive module 15 is provided to second node 32.And due to the photosensitive module 15 other end is connect with third node 33, therefore, to the second node 32 signal position from the third node 33 letter Number.Simultaneously as photosensitive module 15 is connected between the second driven submodule 132 and third node 33, so that the photosensitive module 15 share a part of pressure drop of the signal from third node 33, i.e., provided to second node 32 from third node 33 Signal is the signal after partial pressure, therefore, when the resistance of photosensitive module 15 changes with light intensity, the voltage of the second node 32 It may also change accordingly.
Further, Fig. 3 and Fig. 6 are please referred to, the first driven submodule 131 may include the first transistor T1, this first The grid of transistor T1 is connect with second node 32, and the first order of the first transistor T1 is connect with the first power end V1, this The second level of one transistor T1 is connect with third node 33.
Second driven submodule 132 includes second transistor T2, the grid and gate drive signal of second transistor T2 Hold G connection, the first order of second transistor T2 connect with one end of photosensitive module 15, the second level of second transistor T2 and Second node 32 connects.
With continued reference to FIG. 5, the first Data write. module 11 respectively with gate drive signal end G, data signal end D and One node 31 connection, for being provided to first node 31 under the control of the gate drive signal from gate drive signal end G Data-signal from data signal end D.
Please continue to refer to Fig. 3 and Fig. 6, the first Data write. module 11 includes: third transistor T3, third transistor T3 Grid connect with gate drive signal end G, the first order of third transistor T3 is connect with data signal end D, and the third is brilliant The second level of body pipe T3 is connect with first node 31.
With continued reference to FIG. 5, pixel circuit 1 can also include: the second Data write. module 16, which is written mould Block 16 is connect with second control signal end EM2, second source end V2 and first node 31 respectively, for from the second control letter Number end EM2 second control signal control under, to first node 31 provide the second source signal from second source end V2.
With continued reference to FIG. 6, the second Data write. module 16 may include: the 4th transistor T4, the 4th transistor T4 Grid connect with second control signal end EM2, the first order of the 4th transistor T4 is connect with second source end V2, the 4th The second level of transistor T4 is connect with first node 31.
Further, it with continued reference to FIG. 5, the second Data write. module 16 can also be connect with reset signal end RST, uses Under the control in the reset signal from reset signal end RST, the from second source end V2 is provided to first node 31 Two power supply signals.
Correspondingly, with continued reference to FIG. 6, the second Data write. module 16 can also include: the 5th transistor T5, the 5th The grid of transistor T5 is connect with reset signal end RST, and the first order of the 5th transistor T5 is connect with second source end V2, should The second level of 5th transistor T5 is connect with first node 31.
With continued reference to FIG. 5, light emitting control module 14 respectively with third node 33, first control signal end EM1 and shine Module 20 connects, for being provided under the control of the first control signal from first control signal end EM1 to light emitting module 20 Signal from third node 33.
Further, as shown in Figure 3 and Figure 6, light emitting control module 14 may include: the 6th transistor T6.6th is brilliant The grid of body pipe T6 is connect with first control signal end EM1, and the first order of the 6th transistor T6 is connect with third node 33, should The second level of 6th transistor T6 is connect with light emitting module 20.
With continued reference to FIG. 5, memory module 12 is connected between first node 31 and second node 32, the memory module 12 Current potential for controlling second node 32 follows the synchronous variation of the current potential of first node 31, and/or, the memory module 12 is for controlling The node of system control first node 31 follows the synchronous variation of the current potential of second node 32.
Further, please continue to refer to Fig. 3 and Fig. 6, memory module 12 may include: first capacitor 121, first capacitor 121 first end is connect with first node 31, and the second end of first capacitor is connect with second node 32.
Optionally, referring to FIG. 5, pixel circuit can also include: reseting module 17.Reseting module 17 is believed with reset respectively Number end RST, third power end V3 and second node 32 connect, for the control in the reset signal from reset signal end RST Under, the third power supply signal from third power end V3 is provided to second node 32.
Further, referring to FIG. 6, reseting module 17 may include: the 7th transistor T7, the grid of the 7th transistor T7 Pole is connect with reset signal end RST, and the first order of the 7th transistor T7 is connect with third power end V3, the 7th transistor T7 The second level connect with second node 32.
In second of achievable mode of photosensitive module, as shown in fig. 7, drive module 13 include: respectively with third section The first driven submodule 131 and the second driven submodule 132 of 33 connection of point, photosensitive module 15 are connected on the second driven submodule Between 132 and second node 32.
As shown in fig. 7, the first driven submodule 131 respectively with second node 32, the first power end V1 and third node 33 Connection, for providing the first power supply signal from the first power end V1 to third node 33 under the control of second node 32. Second driven submodule 132 is connect with gate drive signal end G, one end of photosensitive module 15 and third node 33 respectively, is used for Under the control of gate drive signal, the signal from third node 33 is provided to second node 32 by photosensitive module 15.Its In, the other end of photosensitive module 15 is connect with second node 32.
Further, referring to FIG. 8, the first driven submodule 131 includes: the first transistor T1, the first transistor T1 Grid connect with second node 32, the first order of the first transistor T1 is connect with the first power end V1, the first transistor The second level of T1 is connect with third node 33.
Second driven submodule 132 includes second transistor T2, the grid and gate drive signal of second transistor T2 G connection is held, the first order of second transistor T2 is connect with third node 33, the second level of second transistor T2 and photosensitive mould One end of block 15 connects.
In second of achievable mode of the photosensitive module, the first Data write. module 11,14 and of light emitting control module The connection type and specific structure of memory module 12, can correspond to reference photosensitive module the first can in realization mode first The connection type and specific structure of Data write. module, light emitting control module and memory module, the embodiment of the present invention are not done herein It repeats.
Further, as shown in fig. 7, pixel circuit can also include: the second Data write. module 16 and reseting module 17. And the connection type and specific structure of second Data write. module 16 and reseting module 17, reference photosensitive module can be corresponded to The first can the second Data write. module and reseting module in realization mode connection type and specific structure, the present invention implemented This will not be repeated here for example.
The third in photosensitive module can be in realization mode, as shown in figure 9, photosensitive module 15 is connected on the write-in of the first data Between module 11 and first node 31.
As shown in figure 9, the first Data write. module 11 respectively with gate drive signal end G, data signal end D and photosensitive mould One end of block 15 connects, for passing through photosensitive module 15 under the control of the gate drive signal from gate drive signal end G The data-signal from data signal end D is provided to first node 31.And due to the other end and first node of photosensitive module 15 31 connections, so that the photosensitive module 15 shares a part of pressure drop of the data-signal from data signal end D, i.e., to first node The signal from data signal end D of 31 offers is the signal after partial pressure, therefore, when the resistance of photosensitive module 15 is with light intensity When variation, the voltage of the first node 31 be may also change accordingly.
Further, as shown in Figure 10, the first Data write. module 11 may include: third transistor T3, and the third is brilliant The grid of body pipe T3 is connect with gate drive signal end G, and the first order of third transistor T3 is connect with data signal end D, should The second level of third transistor T3 is connect with one end of photosensitive module 15.
The third in the photosensitive module can be in realization mode, as shown in figure 9, drive module 13 includes: the first driving Module 131 and the second driven submodule 132.First driven submodule 131 respectively with second node 32, the first power end V1 and Three nodes 33 connection, for providing first from the first power end V1 to third node 33 under the control of second node 32 Power supply signal.Second driven submodule 132 is connect with gate drive signal end G, second node 32 and third node 33 respectively, is used In under the control of gate drive signal, the signal from third node 33 is provided to second node 32.
Referring to FIG. 10, the first driven submodule 131 may include the first transistor T1, the grid of the first transistor T1 It being connect with second node 32, the first order of the first transistor T1 is connect with the first power end V1, and the of the first transistor T1 Second level is connect with third node 33.
Second driven submodule 132 includes second transistor T2, the grid and gate drive signal of second transistor T2 G connection is held, the first order of second transistor T2 is connect with third node 33, the second level of second transistor T2 and the second section 32 connection of point.
The third in the photosensitive module can be in realization mode, the connection type of light emitting control module 14 and memory module 12 And specific structure, can by corresponding reference photosensitive module the first can in a manner of realization in light emitting control module and memory module company Mode and specific structure are connect, this will not be repeated here for the embodiment of the present invention.
Further, as shown in figure 9, pixel circuit can also include: the second Data write. module 16 and reseting module 17. Wherein, the connection type and specific structure of the second Data write. module 16 and reseting module 17, can corresponding reference photosensitive module The first can the second Data write. module and reseting module in realization mode connection type and specific structure, the present invention is real Applying example, this will not be repeated here.
In the 4th kind of achievable mode of photosensitive module, as shown in figure 11, photosensitive module 15 is connected on the first data and writes Enter between module 11 and data signal end D.
Please refer to Figure 11, the first Data write. module 11 respectively with gate drive signal end G, first node 31 and photosensitive mould One end of block 15 connects, for being mentioned under the control of the gate drive signal from gate drive signal end G to first node 31 It is the data-signal from data signal end D for the signal from photosensitive module 15, and from the signal of photosensitive module 15.Due to The other end of photosensitive module 15 is connect with data signal end D, so that the photosensitive module 15 shares the data from data signal end D A part of pressure drop of signal, i.e., to first node 31 provide the signal from data signal end D be by partial pressure after signal, Therefore, when the resistance of photosensitive module 15 changes with light intensity, the voltage of the first node 31 be may also change accordingly.
Further, as shown in figure 12, the first Data write. module 11 may include: third transistor T3, and the third is brilliant The grid of body pipe T3 is connect with gate drive signal end G, and the first order of third transistor T3 and one end of photosensitive module 15 connect It connects, the second level of third transistor T3 is connect with first node 31.
In the 4th kind of achievable mode of the photosensitive module, the connection type and specific structure of drive module, Ke Yixiang Answer reference photosensitive module the third can drive module in realization mode connection type and specific structure；Light emitting control module With the connection type and specific structure of memory module, can by corresponding reference photosensitive module the first can in a manner of realization in shine The connection type and specific structure of control module and memory module, this will not be repeated here for the embodiment of the present invention.
Further, as shown in figure 11, pixel circuit can also include: the second Data write. module 16 and reseting module 17.The connection type and specific structure of second Data write. module 16 and reseting module 17, can corresponding reference photosensitive module The first can the second Data write. module and reseting module in realization mode connection type and specific structure, the present invention implemented This will not be repeated here for example.
In the 5th kind of achievable mode of photosensitive module, as shown in figure 13, pixel circuit can also include: the second data Writing module 16, the second Data write. module 16 are connect with second control signal end EM2 and second source end V2 respectively, photosensitive mould Block 15 is connected between the second Data write. module 16 and first node 31.
Please refer to Figure 13, the second Data write. module 16 respectively with second control signal end EM2, second source end V2 and light One end of quick module 15 connects, under the control of the second control signal from second control signal end EM2, Xiang Guangmin mould Block 15 provide the second source signal from second source end V2, and via photosensitive module 15 to first node 31 provide this second Power supply signal.And between the other end due to photosensitive module 15 and first node 31, so that photosensitive module 15 is shared from second A part of pressure drop of the second source signal of power end V2 is from second source end V2 to the signal that first node 31 provides Signal by partial pressure after signal, therefore, when the resistance of photosensitive module 15 changes with light intensity, the voltage of the first node 31 It may also change accordingly.
Further, as shown in figure 14, the second Data write. module 16 may include: the 4th transistor T4, and the 4th is brilliant The grid of body pipe T4 is connect with second control signal end EM2, and the first order of the 4th transistor T4 is connect with second source end V2, The second level of 4th transistor T4 is connect with one end of photosensitive module 15.
Still further, please referring to Figure 13, the second Data write. module 16 can also be connect with reset signal end RST, be used Under the control in the reset signal from reset signal end RST, the from second source end V2 is provided to photosensitive module 15 Two power supply signals.
Correspondingly, as shown in figure 14, the second Data write. module 16 can also include: the 5th transistor T5, the 5th is brilliant The grid of body pipe T5 is connect with reset signal end RST, and the first order of the 5th transistor T5 is connect with second source end V2, this The second level of five transistor T5 is connect with one end of photosensitive module 15.
In the 5th kind of achievable mode of the photosensitive module, the connection type and specific structure of drive module 13 can be with Reference photosensitive module the third can drive module in realization mode connection type and specific structure, the embodiment of the present invention exists This is not repeated them here.The connection type and specific structure of first Data write. module 11, light emitting control module 14 and memory module 12, Can by corresponding reference photosensitive module the first can in a manner of realization in the first Data write. module, light emitting control module and storage The connection type and specific structure of module, this will not be repeated here for the embodiment of the present invention.
Further, as shown in figure 13, pixel circuit can also include: reseting module 17.Wherein, the company of reseting module 17 Connect mode and specific structure can by reference photosensitive module the first can in a manner of realization in reseting module connection type and tool Body structure, this will not be repeated here for the embodiment of the present invention.
In the 6th kind of achievable mode of photosensitive module, as shown in figure 15, pixel circuit can also include: the second data Writing module 16, the second Data write. module 16 are connect with first node 31, and photosensitive module 15 is connected on the second data write-in mould Between block 16 and second source end V2.
Please refer to Figure 15, the second Data write. module 16 respectively with second control signal end EM2, first node 31 and photosensitive One end of module 15 connects, under the control of the second control signal from second control signal end EM2, to first node 31 provide the signal from photosensitive module 15, wherein the signal from photosensitive module 15 is second from second source end V2 Power supply signal.And between the other end due to photosensitive module 15 and second source end V2, so that photosensitive module 15 is shared from A part of pressure drop of the second source signal of two power end V2, i.e., the letter from second source end V2 provided to first node 31 It number is the signal after partial pressure, therefore, when the resistance of photosensitive module 15 changes with light intensity, the voltage of the first node 31 It can corresponding change.
Further, as shown in figure 16, the second Data write. module 16 may include: the 4th transistor T4, and the 4th is brilliant The grid of body pipe T4 is connect with second control signal end EM2, the first order of the 4th transistor T4 and one end of photosensitive module 15 Connection, the second level of the 4th transistor T4 is connect with first node 31.
Still further, please referring to Figure 15, the second Data write. module 16 can also be connect with reset signal end RST, be used Under the control in the reset signal from reset signal end RST, the signal from photosensitive module 15 is provided to first node 31.
Correspondingly, the second Data write. module 16 can also include: the 5th transistor T5, the grid of the 5th transistor T5 It is connect with reset signal end RST, the first order of the 5th transistor T5 is connect with one end of photosensitive module 15, the 5th transistor The second level of T5 is connect with first node 31.
In this kind of achievable mode, the connection type and specific structure of drive module 13 can be with reference photosensitive modules The third can drive module 13 in realization mode connection type and specific structure, this will not be repeated here for the embodiment of the present invention. The connection type and specific structure of first Data write. module 11, light emitting control module 14 and memory module 12, can join respectively Examine photosensitive module 15 the first can the first Data write. module in realization mode, light emitting control module and memory module company Mode and specific structure are connect, this will not be repeated here for the embodiment of the present invention.
Further, as shown in figure 15, pixel circuit can also include: reseting module 17.Wherein, the company of reseting module 17 Connect mode and specific structure can by reference photosensitive module the first can in a manner of realization in reseting module connection type and tool Body structure, this will not be repeated here for the embodiment of the present invention.
In conclusion pixel circuit provided in an embodiment of the present invention includes photosensitive module, photosensitive module is located to the second section On the access of point input signal, and photosensitive module is able to detect the intensity of light in pixel circuit local environment, and according to the light The current potential of strength control second node so as to light emitting module provide electric current and pixel circuit local environment in light intensity just Correlation, compared to the prior art, the electric current that can be provided according to the intensity adjustment of light in different light intensity environment to light emitting module Size, achieve the effect that adjust luminescent device light emission luminance, improve the display performance of display panel.
Also, since the light-sensitive element in the embodiment of the present invention is arranged in pixel circuit, so that in each pixel unit Pixel circuit can according to the intensity of light, adjust in the pixel unit luminescent device provide driving current size, Therefore, the realization side of the size of the electric current provided to luminescent device is provided compared to the sensor by being arranged in display device Formula improves the precision for adjusting driving current, effectively improves the efficiency for adjusting driving current.
In addition, since the light-sensitive element in the embodiment of the present invention is arranged in pixel circuit, so that without in display device In sensor is additionally set so that display device can have biggish display area, improve the screen accounting of display device.
The embodiment of the invention provides a kind of driving method of pixel circuit, can be used for driving such as Fig. 2, Fig. 3, Fig. 5 extremely Pixel circuit shown in Fig. 8 is any.As shown in figure 17, the driving method of the pixel circuit may include: the charging stage and shine Stage.
Step 1701, in the charging stage, the gate drive signal of pole driving signal end output is significant level, the first electricity First power supply signal of source output is significant level, and the data-signal of data signal end output is significant level, the first data Writing module provides data-signal under the control of gate drive signal, to first node, and memory module controls second node Current potential follows the potential change of first node, and, drive module provides first under the control of second node, to third node Power supply signal, and the optical signal in photosensitive module detection pixel circuit local environment, drive module is also in gate drive signal Under control, the signal from third node is provided to second node by photosensitive module.
Step 1702, in light emitting phase, first control signal end output first control signal be significant level, second Node remains significant level, and drive module provides the first power supply signal under the control of second node, to third node, shines For control module under the control of first control signal, the light emitting module into pixel unit provides the signal from third node.
In conclusion the driving method of pixel circuit provided in an embodiment of the present invention, by inputting letter to second node Number access on photosensitive module is set, enable drive module under the control of gate drive signal, by photosensitive module to Second node provides the signal from third node, with the electricity of the strength control second node of the light detected according to photosensitive module Position, compared to the prior art, can be according to the electric current that the intensity adjustment of light in different light intensity environment is provided to light emitting module Size improves the display performance of display panel.
Further, the driving luminescence method of pixel circuit can also include: the reset phase before the charging stage, and Compensated stage between charging stage and light emitting phase.
In reset phase, the reset signal of reset signal end output is significant level, the third of third power end output Power supply signal is inactive level, and reseting module is provided to second node from third power end under the control of reset signal Third power supply signal, the second Data write. module provide to first node under the control of reset signal and come from second source end Second source signal.
In compensated stage, the second control signal of second control signal end output is significant level, the write-in of the second data Module provides the second source signal from second source end under the control of second control signal, to first node.
Figure 18 is a kind of timing diagram of the driving process of pixel circuit provided in an embodiment of the present invention.Below shown in Fig. 6 Pixel circuit, and low level be significant level, high level be inactive level for, picture provided by the above embodiment is discussed in detail The driving principle of plain circuit.
In reset phase t1, the reset signal of reset signal end RST output is low level, and the 7th transistor T7 is multiple at this It is connected under the driving of position signal.Third power end V3 inputs third power supply signal to second node 32 by the 7th transistor T7, Second node 32 is reset, so that the current potential of second node is equal to the amplitude Vint of third power supply signal.The first transistor T1 is turned off under the control of the second node 32.Meanwhile the 5th transistor T5 be connected under the driving of reset signal, second source V2 is held to input second source signal to first node 31 by the 5th transistor T5, so that the current potential of first node 31 is equal to second The amplitude Vref of power supply signal.
In charging stage t2, the gate drive signal of gate drive signal end G output is low level, data signal end D The data-signal of output is in low level, and third transistor T3 is connected under the driving of the gate drive signal, data signal end D By third transistor T3 to 31 input data signal of first node, so that the current potential of first node 31 is reduced to data-signal Current potential Vdata.At this point, the current potential of second node 32 is reduced to Vint+ (Vref- therewith under the coupling of first capacitor Vdata), and the current potential of the second node 32 is in low level.The first transistor T1 is connected under the driving of the second node 32, And second transistor T2 is connected under the driving of gate drive signal, the first power end V1 passes through the first transistor T1 to third section Point 33 provides the first power supply signal from the first power end V1, and third node passes sequentially through photosensitive module and second transistor T2 First power supply signal is provided to second node 32, so that the current potential of second node 32 is finally controlled as Vdd+Vth-V.Its In, Vdd is the voltage magnitude of the first power supply signal, and Vth is the cut-in voltage of the first transistor T1, and V is the partial pressure of photosensitive module.
In compensated stage t3, the second control signal of second control signal end EM2 output is low level, the 4th transistor T4 is connected under the driving of the second control signal, and second source end V2 is by the 4th transistor T4 to the input of first node 31 the Two power supply signals, so that the current potential of first node 31 becomes Vref from Vdata.At this point, under the coupling of first capacitor, the The current potential of two nodes 32 becomes (Vdd+Vth-V)+(Vref-Vdata).Wherein, (Vref-Vdata) is the in compensated stage The potential change amount of one node 31.
In light emitting phase t4, the first control signal of first control signal end EM1 output is low level, the 6th transistor T6 is connected under the control of first control signal.Also, the current potential of second node 32 remains (Vdd+Vth-V)+(Vref- Vdata), i.e., the current potential of the second node 32 is in low level, so that the first transistor T1 is under the driving of the second node 32 Conducting, the first power end V1 provide the first power supply letter from the first power end V1 to third node 33 by the first transistor T1 Number.And then third node 33 inputs first power supply signal to light emitting module 20 by the 6th transistor T6, to drive luminous mould Block 20 shines.
At this point, the electric current for flowing through light emitting module 20 is big are as follows: I=0.5 × K × (Vgs-Vth)2, wherein Vgs is first brilliant Voltage difference between the grid and source electrode (i.e. the first order of the first transistor T1) of body pipe T1, K=μ × Cox× W/L, K indicate the The characterisitic parameter of one transistor T1, μ indicate the electron mobility of the first transistor T1, CoxIndicate the capacitor of the first transistor T1, W/L indicates the breadth length ratio of the conducting channel of the first transistor T1.
The current potential of the grid of the first transistor T1 is equal to the current potential of second node 32, the i.e. grid of the first transistor T1 Current potential are as follows: (Vdd+Vth-V)+(Vref-Vdata), the current potential of the first transistor T1 first order are Vdd, therefore, Vgs=(Vdd+ Vth-V+Vref-Vdata)-Vdd=Vth-V+Vref-Vdata.At this point, Vgs-Vth=(Vth-V+Vref-Vdata)-Vth =Vref-Vdata-V.Then flow through the size of current of light emitting module 20 are as follows: I=0.5 × K × (Vref-Vdata-V)2.According to this Known to current formula: flowing through the size of current and (Vref-Vdata-V) of light emitting module 202It is positively correlated.And (Vref-Vdata+V)2 It is related with the partial pressure V of photosensitive module, therefore, the size of the electric current provided to light emitting module can be adjusted by photosensitive module.
Also, when the light of the environment locating for the light-sensitive element is darker, light-sensitive element is in off state, the light-sensitive element phase When in open circuit, at this point, the resistance of photosensitive module is approximately equal to the resistance value of first resistor.The light of the environment locating for the light-sensitive element compared with When bright, light-sensitive element is on the stage, at this point, the resistance of photosensitive module is the electricity after light-sensitive element is in parallel with first resistor Resistance.Since the resistance of light-sensitive element and the intensity for the light being radiated in the environment on light-sensitive element are negatively correlated, so that photosensitive module Resistance and the intensity of light that is radiated in the environment on light-sensitive element it is negatively correlated, correspondingly, the partial pressure and environment of photosensitive module In light intensity it is negatively correlated.It that is to say, the intensity of the light in environment is bigger, and the resistance of light-sensitive element is with regard to smaller, first resistor All-in resistance with light-sensitive element is with regard to smaller, and the partial pressure of photosensitive module is with regard to smaller.Also, according to the size of current for flowing through light emitting module Formula in as can be seen that flow through light emitting module electric current and photosensitive module partial pressure it is negatively correlated, therefore, flow through light emitting module The intensity of light in electric current and environment is positively correlated.It can thus be seen that second node can be adjusted by photosensitive module in difference Current potential in light intensity environment makes the brightness of light emitting module with the strong of the light in environment to adjust the electric current provided to light emitting module Degree is positively correlated variation.
In conclusion the driving method of pixel circuit provided in an embodiment of the present invention, by inputting letter to second node Number access on photosensitive module is set, enable drive module under the control of gate drive signal, by photosensitive module to Second node provides the signal from third node, with the electricity of the strength control second node of the light detected according to photosensitive module Position, compared to the prior art, can be according to the electric current that the intensity adjustment of light in different light intensity environment is provided to light emitting module Size improves the display performance of display panel.
Also, since the light-sensitive element in the embodiment of the present invention is arranged in pixel circuit, so that in each pixel unit Pixel circuit can according to the intensity of light, adjust in the pixel unit luminescent device provide driving current size, Therefore, the realization side of the size of the electric current provided to luminescent device is provided compared to the sensor by being arranged in display device Formula improves the precision for adjusting driving current, effectively improves the efficiency for adjusting driving current.
In addition, since the light-sensitive element in the embodiment of the present invention is arranged in pixel circuit, so that without in display device In sensor is additionally set so that display device can have biggish display area, improve the screen accounting of display device.
The embodiment of the invention provides the driving method of another pixel circuit, can be used for driving such as Fig. 2, Fig. 3, Fig. 9 To Figure 12 it is any shown in pixel circuit.As shown in figure 19, the driving method of the pixel circuit may include: charging stage and hair Photophase.
Step 1901, in the charging stage, gate drive signal end output gate drive signal be significant level, first First power supply signal of power end output is significant level, and the data-signal of data signal end output is significant level, photosensitive mould Optical signal in block detection pixel circuit local environment, the first Data write. module pass through under the control of gate drive signal Photosensitive module provides data-signal to first node, and the current potential of memory module control second node follows the current potential of first node to become Change, and, drive module provides the first power supply signal under the control of gate drive signal and second node, to third node, And drive module provides the signal from third node to second node also under the control of gate drive signal.
Step 1902, in light emitting phase, first control signal end output first control signal be significant level, second Node remains significant level, and drive module provides the first power supply signal under the control of second node, to third node, shines For control module under the control of first control signal, the light emitting module into pixel unit provides the signal from third node.
In conclusion the driving method of pixel circuit provided in an embodiment of the present invention, by inputting letter to second node Number access on photosensitive module is set so that the first Data write. module is under the control of gate drive signal, by photosensitive mould Block provides data-signal to first node, with the current potential of the strength control second node of the light detected according to photosensitive module, phase Compared with the prior art, the size for the electric current that can be provided according to the intensity adjustment of light in different light intensity environment to light emitting module, Improve the display performance of display panel.
Further, the driving method of pixel circuit can also include: the reset phase before the charging stage, Yi Ji Compensated stage between charging stage and light emitting phase.
In reset phase, the reset signal of reset signal end output is significant level, the third of third power end output Power supply signal is inactive level, and reseting module is provided to second node from third power end under the control of reset signal Third power supply signal, the second Data write. module provide to first node under the control of reset signal and come from second source end Second source signal.
In compensated stage, the second control signal of second control signal end output is significant level, the write-in of the second data Module provides the second source signal from second source end under the control of second control signal, to first node.
Below with timing diagram shown in Figure 18 and pixel circuit shown in Fig. 10, and low level is significant level, high electricity It puts down as the driving principle of pixel circuit provided by the above embodiment for inactive level, is discussed in detail.
In reset phase t1, the reset signal of reset signal end RST output is low level, and the 7th transistor T7 is multiple at this It is connected under the driving of position signal.Third power end V3 inputs third power supply signal to second node 32 by the 7th transistor T7, Second node 32 is reset, so that the current potential of second node is equal to the amplitude Vint of third power supply signal.The first transistor T1 is turned off under the control of the second node 32.Meanwhile the 5th transistor T5 be connected under the driving of reset signal, second source V2 is held to input second source signal to first node 31 by the 5th transistor T5, so that the current potential of first node 31 is equal to second The amplitude Vref of power supply signal.
In charging stage t2, the gate drive signal of gate drive signal end G output is low level, data signal end D The data-signal of output is in low level, and third transistor T3 is connected under the driving of the gate drive signal, data signal end D By third transistor T3 and photosensitive module to 31 input data signal of first node, at this point, photosensitive module is from the data-signal In partial pressure be V so that the jump in potential of first node 31 be Vdata-V, the Vdata be data-signal current potential.At this point, Under the coupling of first capacitor, the current potential of second node 32 is reduced to Vint+ (Vref-Vdata+V) therewith, i.e. second section The current potential of point 32 is in low level.The first transistor T1 is connected under the driving of the second node 32, and second transistor T2 exists It is connected under the driving of gate drive signal, the first power end V1 is provided to third node 33 by the first transistor T1 and come from first The first power supply signal of power end V1, third node 33 are provided to second node 32 by second transistor T2 and come from the first power supply The first power supply signal for holding V1, so that the current potential of second node 32 is finally controlled as Vdd+Vth.Wherein, Vdd is the first power supply The voltage magnitude of signal, Vth are the cut-in voltage of the first transistor T1.
In compensated stage t3, the second control signal of second control signal end EM2 output is low level, the 4th transistor T4 is connected under the driving of the second control signal, and second source end V2 is by the 4th transistor T4 to the input of first node 31 the Two power supply signals, so that the current potential of first node 31 becomes Vref from Vdata-V.At this point, under the coupling of first capacitor, The current potential of second node 32 becomes Vdd+Vth+ (Vref-Vdata+V).Wherein, (Vref-Vdata+V) is in compensated stage The potential change amount of first node 31.
In light emitting phase t4, the first control signal of first control signal end EM1 output is low level, the 6th transistor T6 is connected under the control of first control signal.Also, the current potential of second node 32 remains Vdd+Vth+ (Vref-Vdata+ V), i.e., the current potential of the second node 32 is in low level, so that the first transistor T1 is connected under the driving of the second node 32, First power end V1 provides the first power supply signal from the first power end V1, third to third node by the first transistor T1 Node 33 inputs the first power supply signal from the first power end V1 to light emitting module 20 by the 6th transistor T6, to drive hair Optical module 20 shines.
At this point, the electric current for flowing through light emitting module 20 is big are as follows: I=0.5 × K × (Vgs-Vth)2, wherein Vgs is first brilliant Voltage difference between the grid and source electrode (i.e. the first order of the first transistor T1) of body pipe T1, K=μ × Cox× W/L, K indicate the The characterisitic parameter of one transistor T1, μ indicate the electron mobility of the first transistor T1, CoxIndicate the capacitor of the first transistor T1, W/L indicates the breadth length ratio of the conducting channel of the first transistor T1.
The current potential of the grid of the first transistor T1 is equal to the current potential of second node 32, the i.e. grid of the first transistor T1 Current potential are as follows: Vdd+Vth+ (Vref-Vdata+V), the current potential of the first transistor T1 first order are Vdd, therefore, Vgs=(Vdd+ Vth+Vref-Vdata+V)-Vdd=Vth+Vref-Vdata+V.At this point, Vgs-Vth=(Vth+Vref-Vdata+V)-Vth =Vref-Vdata+V.Then flow through the size of current of light emitting module 20 are as follows: I=0.5 × K × (Vref-Vdata+V)2.According to this Known to current formula: flowing through the size of current and (Vref-Vdata+V) of light emitting module 202It is positively correlated.And (Vref-Vdata+V)2 It is related with the partial pressure V of photosensitive module, therefore, the size of the electric current provided to light emitting module can be adjusted by photosensitive module.
In conclusion the driving method of pixel circuit provided in an embodiment of the present invention, by inputting letter to second node Number access on photosensitive module is set so that the first Data write. module is under the control of gate drive signal, by photosensitive mould Block provides data-signal to first node, with the current potential of the strength control second node of the light detected according to photosensitive module, phase Compared with the prior art, the size for the electric current that can be provided according to the intensity adjustment of light in different light intensity environment to light emitting module, Improve the display performance of display panel.
Also, since the light-sensitive element in the embodiment of the present invention is arranged in pixel circuit, so that in each pixel unit Pixel circuit can according to the intensity of light, adjust in the pixel unit luminescent device provide driving current size, Therefore, the realization side of the size of the electric current provided to luminescent device is provided compared to the sensor by being arranged in display device Formula improves the precision for adjusting driving current, effectively improves the efficiency for adjusting driving current.
In addition, since the light-sensitive element in the embodiment of the present invention is arranged in pixel circuit, so that without in display device In sensor is additionally set so that display device can have biggish display area, improve the screen accounting of display device.
The embodiment of the invention provides the driving method of another pixel circuit, can be used for driving such as Fig. 2, Fig. 3, Figure 13 To Figure 16 it is any shown in pixel circuit.As shown in figure 20, the driving method of the pixel circuit may include: charging stage and hair Photophase.
Step 2001, in the charging stage, gate drive signal end output gate drive signal be significant level, first First power supply signal of power end output is significant level, and the second source signal of second source end output is significant level, number Data-signal according to signal end output is significant level, and the second control signal of second control signal end output is significant level, Optical signal in photosensitive module detection pixel circuit local environment, control of first Data write. module in gate drive signal Under, data-signal is provided to first node, the second Data write. module is under the control of second control signal, by photosensitive module Second source signal is provided to first node, the current potential of memory module control second node follows the potential change of first node, And drive module provides the first power supply signal to third node, drive module is also driven in grid under the control of second node Under the control of dynamic signal, the signal from third node is provided to second node.
Step 2002, in light emitting phase, first control signal end output first control signal be significant level, second Node remains significant level, and drive module provides the first power supply signal under the control of second node, to third node, shines For control module under the control of first control signal, the light emitting module into pixel unit provides the signal from third node.
In conclusion the driving method of pixel circuit provided in an embodiment of the present invention, by inputting letter to second node Number access on photosensitive module is set, enable the second drive module under the control of second control signal, by photosensitive mould Block provides second source signal to first node, with the electricity of the strength control second node of the light detected according to photosensitive module Position, compared to the prior art, can be according to the electric current that the intensity adjustment of light in different light intensity environment is provided to light emitting module Size improves the display performance of display panel.
Further, the driving method of pixel circuit can also include: the reset phase before the charging stage, Yi Ji Compensated stage between charging stage and light emitting phase.
In reset phase, the reset signal of reset signal end output is significant level, the third of third power end output Power supply signal is inactive level, and reseting module is provided to second node from third power end under the control of reset signal Third power supply signal, the second Data write. module provide to first node under the control of reset signal and come from second source end Second source signal.
In compensated stage, the second control signal of second control signal end output is significant level, the write-in of the second data Module provides the second source signal from second source end under the control of second control signal, to first node.
Below with pixel circuit shown in timing diagram shown in Figure 18 and Figure 14, and low level is significant level, high electricity It puts down as the driving principle of pixel circuit provided by the above embodiment for inactive level, is discussed in detail.
In reset phase t1, the reset signal of reset signal end RST output is low level, and the 7th transistor T7 is multiple at this It is connected under the driving of position signal.Third power end V3 inputs third power supply signal to second node 32 by the 7th transistor T7, Second node 32 is reset, so that the current potential of second node is equal to the amplitude Vint of third power supply signal.The first transistor T1 is turned off under the control of the second node 32.Meanwhile the 5th transistor T5 be connected under the driving of reset signal, second source V2 is held to input second source signal to first node 31 by the 5th transistor T5 and photosensitive module, at this point, photosensitive module is to the The partial pressure of two power supply signals is V, so that the current potential of first node 31 is controlled as Vref-V, wherein Vref is second source letter Number voltage magnitude.
In charging stage t2, the gate drive signal of gate drive signal end G output is low level, data signal end D The data-signal of output is in low level, and third transistor T3 is connected under the driving of the gate drive signal, data signal end D By third transistor T3 to 31 input data signal of first node, so that the current potential of first node 31 is reduced to data-signal Current potential Vdata.At this point, the current potential of second node 32 is reduced to Vint+ (Vref-V- therewith under the coupling of first capacitor Vdata), and the current potential of the second node 32 is in low level, so that the first transistor T1 is under the driving of the second node 32 Conducting, and second transistor T2 is connected under the driving of gate drive signal, the first power end V1 by the first transistor T1 to Third node 33 provides the first power supply signal from the first power end V1, and third node 33 passes through second transistor T2 to second Node 32 provides first power supply signal, so that the current potential of second node 32 is controlled as Vdd+Vth.Wherein, Vdd is the first electricity The voltage magnitude of source signal, Vth are the cut-in voltage of the first transistor T1.
In compensated stage t3, the second control signal of second control signal end EM2 output is low level, the 4th transistor T4 is connected under the driving of the second control signal, and second source end V2 passes through the 4th transistor T4 and photosensitive module 15 to first Node 31 inputs second source signal, at this point, photosensitive module is V to the partial pressure of second source signal, so that first node 31 Current potential becomes Vref-V from Vdata.At this point, the current potential of second node 32 becomes Vdd+Vth under the coupling of first capacitor +(Vref-V-Vdata).Wherein, (Vref-V-Vdata) is the potential change amount of the first node 31 in compensated stage.
In light emitting phase t4, the first control signal of first control signal end EM1 output is low level, the 6th transistor T6 is connected under the control of first control signal.Also, the current potential of second node 32 remains Vdd+Vth+ (Vref-V- Vdata), and the current potential of the second node 32 is in low level, so that the first transistor T1 is under the driving of the second node 32 Conducting, the first power end V1 provide the first power supply letter from the first power end V1 to third node by the first transistor T1 Number, third node 33 provides the first power supply signal to light emitting module 20 by the 6th transistor T6, to drive light emitting module 20 to send out Light.
At this point, the electric current for flowing through light emitting module 20 is big are as follows: I=0.5 × K × (Vgs-Vth)2, wherein Vgs is first brilliant Voltage difference between the grid and source electrode (i.e. the first order of the first transistor T1) of body pipe T1, K=μ × Cox× W/L, K indicate the The characterisitic parameter of one transistor T1, μ indicate the electron mobility of the first transistor T1, CoxIndicate the capacitor of the first transistor T1, W/L indicates the breadth length ratio of the conducting channel of the first transistor T1.
The current potential of the grid of the first transistor T1 is equal to the current potential of second node 32, the i.e. grid of the first transistor T1 Current potential are as follows: Vdd+Vth+ (Vref-V-Vdata), the current potential of the first transistor T1 first order are Vdd, therefore, Vgs=(Vdd+ Vth+Vref-V-Vdata)-Vdd=Vth+Vref-V-Vdata.At this point, Vgs-Vth=(Vth+Vref-V-Vdata)-Vth =Vref-V-Vdata.Flow through the size of current of light emitting module 20 are as follows: I=0.5 × K × (Vref-V-Vdata)2.According to the electricity Known to stream formula: flowing through the size of current and (Vref-V-Vdata) of light emitting module 202It is positively correlated.And (Vref-V-Vdata)2With The partial pressure V of photosensitive module is related, therefore, the size of the electric current provided to light emitting module can be adjusted by photosensitive module.
In conclusion the driving method of pixel circuit provided in an embodiment of the present invention, by inputting letter to second node Number access on photosensitive module is set, enable the second drive module under the control of second control signal, by photosensitive mould Block provides second source signal to first node, with the electricity of the strength control second node of the light detected according to photosensitive module Position, compared to the prior art, can be according to the electric current that the intensity adjustment of light in different light intensity environment is provided to light emitting module Size improves the display performance of display panel.
Also, since the light-sensitive element in the embodiment of the present invention is arranged in pixel circuit, so that in each pixel unit Pixel circuit can according to the intensity of light, adjust in the pixel unit luminescent device provide driving current size, Therefore, the realization side of the size of the electric current provided to luminescent device is provided compared to the sensor by being arranged in display device Formula improves the precision for adjusting driving current, effectively improves the efficiency for adjusting driving current.
In addition, since the light-sensitive element in the embodiment of the present invention is arranged in pixel circuit, so that without in display device In sensor is additionally set so that display device can have biggish display area, improve the screen accounting of display device.
The embodiment of the invention provides a kind of pixel unit, which may include: light emitting module and the present invention The pixel circuit that embodiment provides.Wherein, pixel circuit is connect with light emitting module.
The embodiment of the invention provides a kind of display panel, which may include: multiple hairs of array arrangement The pixel unit that bright embodiment provides.
The embodiment of the invention provides a kind of display device, which may include: provided in an embodiment of the present invention Display panel.The display device can be with are as follows: liquid crystal display panel, Electronic Paper, Organic Light Emitting Diode (English: organic light- Emitting diode, referred to as: OLED) panel, mobile phone, tablet computer, television set, display, laptop, digital phase Any products or components having a display function such as frame, navigator.
The foregoing is merely the alternative embodiments of the application, not to limit the application, it is all in spirit herein and Within principle, any modification, equivalent replacement, improvement and so on be should be included within the scope of protection of this application.

Claims (10)

1. a kind of pixel circuit, which is characterized in that the pixel circuit includes: the first Data write. module, memory module, driving Module, light emitting control module and photosensitive module；
First Data write. module is connect with gate drive signal end, data signal end and first node respectively, is used for Under the control of gate drive signal from the gate drive signal end, Xiang Suoshu first node is provided to be believed from the data Number end data-signal；
The memory module is connect with the first node and second node respectively, for control the current potential of the second node with With the synchronous variation of the current potential of the first node；
The drive module connects with the gate drive signal end, the second node, the first power end and third node respectively It connects, under the control of the second node and the gate drive signal, Xiang Suoshu third node and the second node The first power supply signal from first power end is provided；
The light emitting control module connects with the light emitting module in first control signal end, the third node and pixel unit respectively It connects, under the control of the first control signal from the first control signal end, the offer of Xiang Suoshu light emitting module to be come from The signal of the third node；
The photosensitive module is located on the access of the second node input signal, and the photosensitive module is for detecting the picture Optical signal in plain circuit local environment, and control according to the optical signal current potential of the second node.
2. pixel circuit according to claim 1, which is characterized in that the drive module includes: the first driven submodule With the second driven submodule；
First driven submodule is connect with the second node, first power end and the third node respectively, is used Under the control in the second node, Xiang Suoshu third node provides the first power supply signal from first power end；
Second driven submodule respectively with the gate drive signal end, the second node and the photosensitive module one End connection, under the control of the gate drive signal, Xiang Suoshu second node to provide the letter from the photosensitive module Number；
The other end of the photosensitive module is connect with the third node.
3. pixel circuit according to claim 1, which is characterized in that
The photosensitive module and first Data write. module are connected between the data signal end and the first node.
4. pixel circuit according to claim 1, which is characterized in that the pixel circuit further include: the write-in of the second data Module；
Second Data write. module is connect with second control signal end, second source end and the first node respectively, is used Under the control in the second control signal from the second control signal end, Xiang Suoshu first node is provided from described the The second source signal of two power ends；
The photosensitive module and second Data write. module are connected between the second source end and the first node.
5. according to any pixel circuit of claim 2 to 4, which is characterized in that the photosensitive module includes: in parallel the One resistance and light-sensitive element.
6. pixel circuit according to any one of claims 1 to 4, which is characterized in that the pixel circuit further include: reset mould Block；
The reseting module is connect with reset signal end, third power end and the second node respectively, for from described Under the control of the reset signal at reset signal end, Xiang Suoshu second node provides the third power supply letter from the third power end Number.
7. a kind of driving method of pixel circuit, which is characterized in that the pixel circuit includes: the first Data write. module, deposits Store up module, drive module, light emitting control module and photosensitive module, which comprises charging stage and light emitting phase；
In the charging stage, the gate drive signal of gate drive signal end output is significant level, the output of the first power end First power supply signal is significant level, and the data-signal of data signal end output is significant level, and mould is written in first data Block provides the data-signal, the memory module control second under the control of the gate drive signal, to first node The current potential of node follows the potential change of the first node, and, the drive module under the control of the second node, First power supply signal is provided to third node, and the photosensitive module detects the letter of the light in the pixel circuit local environment Number, the drive module mentions also under the control of the gate drive signal, by the photosensitive module to the second node For the signal from the third node；
In light emitting phase, the first control signal of first control signal end output is significant level, and the second node is kept For significant level, for the drive module under the control of the second node, Xiang Suoshu third node provides first power supply Signal, under the control of the first control signal, the light emitting module into pixel unit provides to be come the light emitting control module From the signal of the third node.
8. a kind of driving method of pixel circuit, which is characterized in that the pixel circuit includes: the first Data write. module, deposits Store up module, drive module, light emitting control module and photosensitive module, which comprises charging stage and light emitting phase；
In the charging stage, the gate drive signal of gate drive signal end output is significant level, the output of the first power end First power supply signal is significant level, and the data-signal of data signal end output is significant level, and the photosensitive module detects institute State the optical signal in pixel circuit local environment, first Data write. module under the control of the gate drive signal, The data-signal is provided to first node by the photosensitive module, the current potential of the memory module control second node follows The potential change of the first node, and, the drive module provides under the control of the second node to third node First power supply signal, also under the control of the gate drive signal, Xiang Suoshu second node provides the drive module Signal from the third node；
In light emitting phase, the first control signal of first control signal end output is significant level, and the second node is kept For significant level, for the drive module under the control of the second node, Xiang Suoshu third node provides first power supply Signal, under the control of the first control signal, the light emitting module into pixel unit provides to be come the light emitting control module From the signal of the third node.
9. a kind of driving method of pixel circuit, which is characterized in that the pixel circuit includes: the first Data write. module, Two Data write. modules, memory module, drive module, light emitting control module and photosensitive module, which comprises charging stage And light emitting phase；
In the charging stage, the gate drive signal of gate drive signal end output is significant level, the output of the first power end First power supply signal is significant level, and the second source signal of second source end output is significant level, data signal end output Data-signal be significant level, second control signal end output second control signal be significant level, the photosensitive module Detect the optical signal in the pixel circuit local environment, control of first Data write. module in the gate drive signal Under system, the data-signal, control of second Data write. module in the second control signal are provided to first node Under, the second source signal is provided to the first node by the photosensitive module, the memory module controls the second section The current potential of point follows the potential change of the first node, and, the drive module under the control of the second node, to Third node provides first power supply signal, and the drive module is also under the control of the gate drive signal, Xiang Suoshu Second node provides the signal from the third node；
In light emitting phase, the first control signal of first control signal end output is significant level, and the second node is kept For significant level, for the drive module under the control of the second node, Xiang Suoshu third node provides first power supply Signal, under the control of the first control signal, the light emitting module into pixel unit provides to be come the light emitting control module From the signal of the third node.
10. a kind of display panel, which is characterized in that the display panel includes: multiple pixel units of array arrangement, each picture Plain unit includes: light emitting module and the pixel circuit as described in claim 1 to 6 is any.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112669766A (en) * 2020-09-16 2021-04-16 友达光电股份有限公司 Pixel driving circuit
CN112863454A (en) * 2021-01-15 2021-05-28 厦门天马微电子有限公司 Gate drive circuit, drive method thereof and display panel
CN114241982A (en) * 2021-12-29 2022-03-25 湖北长江新型显示产业创新中心有限公司 Display panel and display device
CN115798408A (en) * 2022-11-30 2023-03-14 惠科股份有限公司 Pixel driving circuit and display device

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090174731A1 (en) * 2008-01-09 2009-07-09 Kim Do-Youb Photo sensor and flat panel display using the same
CN103235276A (en) * 2013-03-28 2013-08-07 国家电网公司 Partial discharge signal generator
CN104108341A (en) * 2014-07-17 2014-10-22 湖北开特汽车电子电器系统股份有限公司 Multifunctional optical sensor device with alarm lamp
CN104618027A (en) * 2013-11-05 2015-05-13 上海雷盘电子科技有限公司 Novel 1W high-power LED infrared ray transmitting tube dedicated for long-distance monitoring
CN105206221A (en) * 2014-06-13 2015-12-30 京东方科技集团股份有限公司 Pixel driving circuit, driving method, array substrate and display device
CN105679245A (en) * 2016-03-31 2016-06-15 上海天马有机发光显示技术有限公司 Pixel compensation circuit and pixel structure
CN107180612A (en) * 2017-07-24 2017-09-19 京东方科技集团股份有限公司 A kind of image element circuit and display panel
CN107566047A (en) * 2017-09-22 2018-01-09 昂纳信息技术（深圳）有限公司 A kind of photoelectric detective circuit and optical-electric module
US20180301080A1 (en) * 2017-04-13 2018-10-18 Samsung Electronics Co., Ltd. Display panel and driving method of display panel
CN108877668A (en) * 2018-07-27 2018-11-23 京东方科技集团股份有限公司 A kind of pixel circuit, its driving method and display panel
CN109256087A (en) * 2018-10-23 2019-01-22 深圳市华星光电技术有限公司 Display device, pixel-driving circuit and its driving method

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090174731A1 (en) * 2008-01-09 2009-07-09 Kim Do-Youb Photo sensor and flat panel display using the same
CN103235276A (en) * 2013-03-28 2013-08-07 国家电网公司 Partial discharge signal generator
CN104618027A (en) * 2013-11-05 2015-05-13 上海雷盘电子科技有限公司 Novel 1W high-power LED infrared ray transmitting tube dedicated for long-distance monitoring
CN105206221A (en) * 2014-06-13 2015-12-30 京东方科技集团股份有限公司 Pixel driving circuit, driving method, array substrate and display device
CN104108341A (en) * 2014-07-17 2014-10-22 湖北开特汽车电子电器系统股份有限公司 Multifunctional optical sensor device with alarm lamp
CN105679245A (en) * 2016-03-31 2016-06-15 上海天马有机发光显示技术有限公司 Pixel compensation circuit and pixel structure
US20180301080A1 (en) * 2017-04-13 2018-10-18 Samsung Electronics Co., Ltd. Display panel and driving method of display panel
CN107180612A (en) * 2017-07-24 2017-09-19 京东方科技集团股份有限公司 A kind of image element circuit and display panel
CN107566047A (en) * 2017-09-22 2018-01-09 昂纳信息技术（深圳）有限公司 A kind of photoelectric detective circuit and optical-electric module
CN108877668A (en) * 2018-07-27 2018-11-23 京东方科技集团股份有限公司 A kind of pixel circuit, its driving method and display panel
CN109256087A (en) * 2018-10-23 2019-01-22 深圳市华星光电技术有限公司 Display device, pixel-driving circuit and its driving method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112669766A (en) * 2020-09-16 2021-04-16 友达光电股份有限公司 Pixel driving circuit
CN112863454A (en) * 2021-01-15 2021-05-28 厦门天马微电子有限公司 Gate drive circuit, drive method thereof and display panel
CN114241982A (en) * 2021-12-29 2022-03-25 湖北长江新型显示产业创新中心有限公司 Display panel and display device
CN114241982B (en) * 2021-12-29 2023-08-15 湖北长江新型显示产业创新中心有限公司 Display panel and display device
CN115798408A (en) * 2022-11-30 2023-03-14 惠科股份有限公司 Pixel driving circuit and display device
CN115798408B (en) * 2022-11-30 2024-01-16 惠科股份有限公司 Pixel driving circuit and display device

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