CN113487998A - Pixel circuit, driving method thereof and display panel - Google Patents

Pixel circuit, driving method thereof and display panel Download PDF

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Publication number
CN113487998A
CN113487998A CN202110832704.5A CN202110832704A CN113487998A CN 113487998 A CN113487998 A CN 113487998A CN 202110832704 A CN202110832704 A CN 202110832704A CN 113487998 A CN113487998 A CN 113487998A
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China
Prior art keywords
module
control
driving
light
transistor
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CN202110832704.5A
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Chinese (zh)
Inventor
安磊
隋鑫
达仕勋
张峰
郭志林
孙丹丹
张民
王丽娟
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Hefei Visionox Technology Co Ltd
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Hefei Visionox Technology Co Ltd
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Priority to CN202110832704.5A priority Critical patent/CN113487998A/en
Publication of CN113487998A publication Critical patent/CN113487998A/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • 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
    • G09G3/22—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]
    • G09G3/3275—Details of drivers for data electrodes
    • G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)

Abstract

The invention discloses a pixel circuit, a driving method thereof and a display panel. The pixel circuit includes: the first driving module is used for generating a first driving current; a first light emitting module for emitting light in response to the first driving current; the second driving module is used for generating a second driving current; the second light-emitting module is used for responding to the second driving current to emit light; the first storage module is used for maintaining the electric potential of the control end of the first driving module; the second storage module is used for maintaining the electric potential of the control end of the second driving module; the data writing module is used for writing a first data voltage into the control end of the first driving module and writing a second data voltage into the control end of the second driving module; and the threshold compensation module is used for compensating the threshold voltages of the second driving module and the first driving module in a data writing stage. The invention can improve the uniformity of display.

Description

Pixel circuit, driving method thereof and display panel
Technical Field
The present invention relates to display technologies, and in particular, to a pixel circuit, a driving method thereof, and a display panel.
Background
With the development of display technology, the application of display panels is becoming more and more extensive, and the demand for display technology is becoming higher and higher accordingly.
The pixel circuit is used as an important component of the display panel, and can drive the light-emitting module therein to emit light, so as to realize the display function of the display panel.
Disclosure of Invention
The invention provides a pixel circuit, a driving method thereof and a display panel, which are used for improving the display uniformity of the display panel.
In a first aspect, an embodiment of the present invention provides a pixel circuit, where the pixel circuit includes:
the first driving module is used for generating a first driving current; a first light emitting module for emitting light in response to the first driving current; the second driving module is used for generating a second driving current; the second light-emitting module is used for responding to the second driving current to emit light; the first storage module is used for maintaining the electric potential of the control end of the first driving module; the second storage module is used for maintaining the electric potential of the control end of the second driving module;
the data writing module is used for writing a first data voltage into the control end of the first driving module and writing a second data voltage into the control end of the second driving module;
and the threshold compensation module is used for compensating the threshold voltages of the second driving module and the first driving module in a data writing stage. The threshold compensation module captures a threshold voltage of the first driving module to a control end of the first driving module and captures a threshold voltage of the second driving module to a control end of the second driving module.
Optionally, the pixel circuit further comprises:
a first initialization module, a first end of which is electrically connected to an initialization signal input end of the pixel circuit, a second end of which is electrically connected to a control end of the first driving module and a control end of the second driving module, and a control end of which is electrically connected to a first scanning signal input end of the pixel circuit;
a second initialization module, a first end of which is electrically connected to the initialization signal input end, a second end of which is electrically connected to the first end of the first light emitting module and the first end of the second light emitting module, and a control end of which is electrically connected to the first scanning signal input end.
Optionally, the pixel circuit further comprises: the lighting control system comprises a first lighting control module, a second lighting control module, a third lighting control module and a fourth lighting control module;
the first end of the data writing module is electrically connected with the data signal input end of the pixel circuit, the second end of the data writing module is electrically connected with the first end of the first driving module and the first end of the second driving module, and the control end of the data writing module is electrically connected with the second scanning signal input end of the pixel circuit;
a first end of the threshold compensation module is electrically connected with a control end of the first driving module and a control end of the second driving module, a second end of the threshold compensation module is electrically connected with a second end of the first driving module and a second end of the second driving module, and a control end of the threshold compensation module is electrically connected with the second scanning signal input end;
the first end of the first light-emitting control module is electrically connected with a first power end of the pixel circuit, the second end of the first light-emitting control module is electrically connected with the first end of the first driving module, and the control end of the first light-emitting control module is electrically connected with a first enable signal input end of the pixel circuit;
a first end of the second light emitting control module is electrically connected with a second end of the first driving module, a second end of the second light emitting control module is electrically connected with a first end of the first light emitting module, and a control end of the second light emitting control module is electrically connected with the first enable signal input end;
a first end of the third light-emitting control module is electrically connected with the first power end, a second end of the third light-emitting control module is electrically connected with a first end of the second driving module, and a control end of the third light-emitting control module is electrically connected with a second enable signal input end of the pixel circuit;
a first end of the fourth light-emitting control module is electrically connected with a second end of the second driving module, and a second end of the fourth light-emitting control module is electrically connected with a first end of the second light-emitting module;
the first end of the first storage module is electrically connected with the first power supply end, and the second end of the first storage module is electrically connected with the control end of the first driving module;
the first end of the second storage module is electrically connected with the first power supply end, and the second end of the second storage module is electrically connected with the control end of the second driving module.
Optionally, the data writing module includes a first transistor, a first end of the first transistor is used as a first end of the data writing module, a second end of the first transistor is used as a second end of the data writing module, and a control end of the first transistor is used as a control end of the data writing module;
the first driving module comprises a second transistor, a first end of the second transistor is used as a first end of the first driving module, a second end of the second transistor is used as a second end of the first driving module, and a control end of the second transistor is used as a control end of the first driving module;
the second driving module comprises a third transistor, a first end of the third transistor is used as a first end of the second driving module, a second end of the third transistor is used as a second end of the second driving module, and a control end of the third transistor is used as a control end of the second driving module;
the threshold compensation module comprises a fourth transistor, wherein a first end of the fourth transistor is used as a first end of the threshold compensation module, a second end of the fourth transistor is used as a second end of the threshold compensation module, and a control end of the fourth transistor is used as a control end of the threshold compensation module;
the first light emitting control module comprises a fifth transistor, wherein a first end of the fifth transistor is used as a first end of the first light emitting control module, a second end of the fifth transistor is used as a second end of the first light emitting control module, and a control end of the fifth transistor is used as a control end of the first light emitting control module;
the second light-emitting control module comprises a sixth transistor, a first end of the sixth transistor is used as a first end of the second light-emitting control module, a second end of the sixth transistor is used as a second end of the second light-emitting control module, and a control end of the sixth transistor is used as a control end of the second light-emitting control module;
the third light emitting control module comprises a seventh transistor, a first end of the seventh transistor is used as a first end of the third light emitting control module, a second end of the seventh transistor is used as a second end of the third light emitting control module, and a control end of the seventh transistor is used as a control end of the third light emitting control module;
the fourth light emitting control module comprises an eighth transistor, a first end of the eighth transistor is used as a first end of the fourth light emitting control module, a second end of the eighth transistor is used as a second end of the fourth light emitting control module, and a control end of the eighth transistor is used as a control end of the fourth light emitting control module;
the first initialization module comprises a ninth transistor, a first end of the ninth transistor is used as a first end of the fourth light emitting control module, a second end of the ninth transistor is used as a second end of the first initialization module, and a control end of the ninth transistor is used as a control end of the first initialization module;
the second initialization module comprises a tenth transistor, a first terminal of the tenth transistor is used as a first terminal of the second initialization module, a second terminal of the tenth transistor is used as a second terminal of the second initialization module, and a control terminal of the tenth transistor is used as a control terminal of the second initialization module;
the first storage module comprises a first capacitor, a first end of the first capacitor is used as a first end of the first storage module, and a second end of the first capacitor is used as a second end of the first storage module;
the second storage module comprises a second capacitor, a first end of the second capacitor is used as a first end of the second storage module, and a second end of the second capacitor is used as a second end of the second storage module.
In a second aspect, an embodiment of the present invention further provides a driving method of a pixel circuit, where the pixel circuit includes: the first driving module is used for generating a first driving current; a first light emitting module for emitting light in response to the first driving current; the second driving module is used for generating a second driving current; the second light-emitting module is used for responding to the second driving current to emit light; the first storage module is used for maintaining the electric potential of the control end of the first driving module; the second storage module is used for maintaining the electric potential of the control end of the second driving module; the data writing module is used for writing a first data voltage into the control end of the first driving module and writing a second data voltage into the control end of the second driving module; the threshold compensation module is used for capturing the threshold voltage of the first driving module to the control end of the first driving module and capturing the threshold voltage of the second driving module to the control end of the second driving module;
the driving method includes:
in a first data writing stage, controlling the data writing module to write a first data voltage into a control end of the first driving module;
in a first light-emitting stage, controlling the first light-emitting module to emit light;
in a second data writing stage, controlling the data writing module to write a second data voltage into the control end of the second driving module;
and in a second light-emitting stage, controlling the second light-emitting module to emit light.
Optionally, the pixel circuit further comprises: a first initialization module, a first end of which is electrically connected to an initialization signal input end of the pixel circuit, a second end of which is electrically connected to a control end of the first driving module and a control end of the second driving module, and a control end of which is electrically connected to a first scanning signal input end of the pixel circuit; a second initialization module, a first end of which is electrically connected to the initialization signal input end, a second end of which is electrically connected to the first end of the first light emitting module and the first end of the second light emitting module, and a control end of which is electrically connected to the first scanning signal input end;
before the first data writing phase, the method further comprises the following steps:
a first initialization stage, which is used for controlling the first initialization module to initialize the first driving module and simultaneously controlling the second initialization module to initialize the first light-emitting module;
before the second data writing phase, the method further comprises:
and in the second initialization stage, the second initialization module is controlled to initialize the second driving module, and the second initialization module is simultaneously controlled to initialize the second light-emitting module.
In a third aspect, an embodiment of the present invention further provides a driving method of a pixel circuit, where the pixel circuit includes: the first driving module is used for generating a first driving current; a first light emitting module for emitting light in response to the first driving current; the second driving module is used for generating a second driving current; the second light-emitting module is used for responding to the second driving current to emit light; the first storage module is used for maintaining the electric potential of the control end of the first driving module; the second storage module is used for maintaining the electric potential of the control end of the second driving module; the data writing module is used for writing a first data voltage into the control end of the first driving module and writing a second data voltage into the control end of the second driving module; the threshold compensation module is used for capturing the threshold voltage of the first driving module to the control end of the first driving module and capturing the threshold voltage of the second driving module to the control end of the second driving module;
the driving method includes:
in a data writing stage, controlling the data writing module to write a first data voltage into a control end of the first driving module, and simultaneously controlling the data writing module to write a second data voltage into a control end of the second driving module; wherein the first data voltage is the same as the second data voltage;
and in the light emitting stage, controlling the first light emitting module and the second light emitting module to emit light simultaneously.
Optionally, the pixel circuit further comprises: a first initialization module, a first end of which is electrically connected to an initialization signal input end of the pixel circuit, a second end of which is electrically connected to a control end of the first driving module and a control end of the second driving module, and a control end of which is electrically connected to a first scanning signal input end of the pixel circuit; a second initialization module, a first end of which is electrically connected to the initialization signal input end, a second end of which is electrically connected to the first end of the first light emitting module and the first end of the second light emitting module, and a control end of which is electrically connected to the first scanning signal input end;
before the data writing phase, the method further comprises the following steps:
and in the initialization stage, the first initialization module is controlled to initialize the first driving module and the second driving module, and the second initialization module is controlled to initialize the first light-emitting module and the second light-emitting module at the same time.
In a fourth aspect, an embodiment of the present invention further provides a display panel, where the display panel includes the pixel circuit described in the first aspect, and the display panel includes a transparent display area and a main display area; the pixel circuit is arranged in the transparent display area.
Optionally, the first driving module is disposed corresponding to the first light emitting module, and the second driving module is disposed corresponding to the second light emitting module.
According to the technical scheme of the embodiment of the invention, the adopted pixel circuit comprises: the first driving module is used for generating a first driving current; a first light emitting module for emitting light in response to a first driving current; the second driving module is used for generating a second driving current; a second light emitting module for emitting light in response to the second driving current; the first storage module is used for maintaining the electric potential of the control end of the first driving module; the second storage module is used for maintaining the electric potential of the control end of the second driving module; the data writing module is used for writing the first data voltage into the control end of the first driving module and writing the second data voltage into the control end of the second driving module; and the threshold compensation module is used for capturing the threshold voltage of the first driving module to the control end of the first driving module and capturing the threshold voltage of the second driving module to the control end of the second driving module. The two driving modules (the first driving module and the second driving module) are adopted to respectively drive the main light-emitting module and the auxiliary light-emitting module (the first light-emitting module and the second light-emitting module), the length difference between a wire (anode wiring of the first light-emitting module) between the first driving module and the first light-emitting module and a wire (anode wiring of the second light-emitting module) between the second driving module and the second light-emitting module is less, so that the resistance difference caused by the anode wiring difference is avoided, the display uniformity is improved, and the display effect is improved.
Drawings
Fig. 1 is a schematic circuit structure diagram of a pixel circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of another pixel circuit according to an embodiment of the present invention;
FIG. 3 is a timing diagram of a pixel circuit according to an embodiment of the present invention;
FIG. 4 is a timing diagram of a pixel circuit according to another embodiment of the present invention;
fig. 5 is a flowchart of a driving method of a pixel circuit according to an embodiment of the invention;
fig. 6 is a flowchart illustrating a driving method of a pixel circuit according to another embodiment of the invention;
fig. 7 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 8 is a cross-sectional view of a display panel according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As mentioned in the background art, the existing display panel is prone to display non-uniformity, and the applicant has found through careful study that the reason for this technical problem is: the display panel is usually provided with a main display area and a transparent display area, the transparent display area can be correspondingly provided with a camera under a screen, for example, in order to improve the light transmittance in the transparent display area, one pixel driving circuit can be arranged to include one driving transistor and two light-emitting units, however, the difference of the lengths of wires between the driving transistor and the two light-emitting units in the pixel circuit is large (the difference of the anode wires of the light-emitting units is large), the difference of the resistance of the anode wires is also large, and thus the display effect is seriously affected.
Based on the technical problem, the invention provides the following solution:
fig. 1 is a schematic circuit structure diagram of a pixel circuit according to an embodiment of the present invention, and referring to fig. 1, the pixel circuit includes: a first driving module 101 for generating a driving current; a first light emitting module 102 for emitting light in response to a first driving current; the second driving module 103 is used for generating a second driving current; a second light emitting module 104 for emitting light in response to the second driving current; a first storage module 105 for maintaining the potential of the control terminal of the first driving module 101; the second storage module 106 is used for maintaining the potential of the control end of the second driving module 103; a data writing module 107, configured to write a first data voltage into a control terminal of the first driving module 101, and write a second data voltage into a control terminal of the second driving module 102; the threshold compensation module 108 is configured to capture a threshold voltage of the first driving module 101 to a control end of the first driving module 101, and capture a threshold voltage of the second driving module 102 to a control end of the second driving module 102.
Specifically, the pixel circuit of the present embodiment may be disposed in a portion of a transparent display area in a display panel, where the display panel may include a main display area and the transparent display area, and the transparent display area is used for correspondingly disposing an off-screen camera; the first light emitting module 102 may be a main light emitting module, and the second light emitting module 104 may be an auxiliary light emitting module, and it should be noted that, in this embodiment, the main light emitting module and the auxiliary light emitting module have the same structure, and it is different that the light transmittance of the position corresponding to the main light emitting module is lower, and the light transmittance of the position corresponding to the auxiliary light emitting module is higher; the first Light Emitting module 102 and the second Light Emitting module 104 may be OLEDs (Organic Light Emitting diodes), which typically include an anode, a hole injection layer, a hole transport layer, an electron blocking layer, a Light Emitting layer, a hole blocking layer, an electron transport layer, an electron injection layer, and a cathode, and the Light Emitting principle thereof is well known to those skilled in the art and is not described herein again. The first driving module 101 may generate a corresponding first driving current according to the first data voltage to drive the first light emitting module 102 to emit light, the second driving module 103 may generate a corresponding second driving current according to the second data voltage to drive the second light emitting module 104 to emit light, the first data voltage may be multiplexed into the second data voltage (which will be described later), in this embodiment, two driving modules (the first driving module 101 and the second driving module 103) are adopted to respectively drive the main light emitting module and the sub light emitting module (the first light emitting module 102 and the second light emitting module 104), the length difference between the conductive line between the first driving module 101 and the first light emitting module 102 (the anode trace of the first light emitting module 102) and the conductive line between the second driving module 103 and the second light emitting module 104 (the anode of the second light emitting module 104) will be less, so as to avoid the resistance difference caused by the anode trace difference, the display effect is improved; meanwhile, in this embodiment, the first storage module 105 may be used to maintain the potential of the control end of the first driving module 101, and the second storage module 106 may be used to maintain the potential of the control end of the second driving module 103, which is equivalent to increasing the overall charge storage capability of the pixel circuit, so that the potentials of the control ends of the first driving module 101 and the second driving module 103 can be stabilized, and the display stability can be improved; in addition, the data writing module 107 in this embodiment can write data voltage into the first driving module 101 and write data voltage into the second driving module 103, and the threshold compensation module 108 can capture both the threshold voltage of the first driving module 101 and the threshold voltage of the second driving module 103.
In the technical solution of this embodiment, the pixel circuit includes: the first driving module is used for generating a first driving current; a first light emitting module for emitting light in response to a first driving current; the second driving module is used for generating a second driving current; a second light emitting module for emitting light in response to the second driving current; the first storage module is used for maintaining the electric potential of the control end of the first driving module; the second storage module is used for maintaining the electric potential of the control end of the second driving module; the data writing module is used for writing the first data voltage into the control end of the first driving module and writing the second data voltage into the control end of the second driving module; and the threshold compensation module is used for capturing the threshold voltage of the first driving module to the control end of the first driving module and capturing the threshold voltage of the second driving module to the control end of the second driving module. The two driving modules (the first driving module and the second driving module) are adopted to respectively drive the main light-emitting module and the auxiliary light-emitting module (the first light-emitting module and the second light-emitting module), the length difference between a wire (anode wiring of the first light-emitting module) between the first driving module and the first light-emitting module and a wire (anode wiring of the second light-emitting module) between the second driving module and the second light-emitting module is less, so that the resistance difference caused by the anode wiring difference is avoided, the display uniformity is improved, and the display effect is improved.
Optionally, with continued reference to fig. 1, the pixel circuit further comprises: a first initialization module 108, a first end of the first initialization module 108 being electrically connected to an initialization signal input end Vint of the pixel circuit, a second end of the first initialization module 108 being electrically connected to a control end of the first driving module 101 and a control end of the second driving module 103, a control end of the first initialization module 108 being electrically connected to a first scanning signal input end S1 of the pixel circuit; a first end of the second initialization module 109 is electrically connected to the initialization signal input terminal Vint, a second end of the second initialization module 109 is electrically connected to the first end of the first light emitting module 101 and the first end of the second light emitting module 104, and a control end of the second initialization module 109 is electrically connected to the first scan signal input terminal S1.
Specifically, the first initialization module 108 can conduct its first terminal with its second terminal under the action of its control terminal control signal, for example, when the control terminal control signal is at a low level, conduct its first terminal with its second terminal, so as to transmit the initialization signal input by the initialization signal input terminal Vint to the control terminal of the first driving module 101 and the control terminal of the second driving module 103, and initialize the first driving module 101 and the second driving module 103, on one hand, preventing the previous frame signal from affecting the first driving module 101 and the second driving module 103, on the other hand, facilitating the conduction of the first driving module 101 and the second driving module 103 in the next stage (to be described later); the second initialization module 109 can conduct its first end with its second end under the action of its control end control signal, for example, when the control end control signal is at low level, conduct its first end with its second end, so as to transmit the initialization signal input by the initialization signal input terminal Vint to the first end of the first light emitting module 102 and the first end of the second light emitting module 104, initialize the first light emitting module 102 and the second light emitting module 104, and prevent the last frame signal from remaining on the first light emitting module 102 and the second light emitting module 104, thereby avoiding the problems of image sticking and the like.
Optionally, with continued reference to fig. 1, the pixel circuit further comprises: a first light emitting control module 110, a second light emitting control module 111, a third light emitting control module 112 and a fourth light emitting control module 113; a first end of the Data writing module 107 is electrically connected to the Data signal input end Data of the pixel circuit, a second end of the Data writing module 107 is electrically connected to a first end of the first driving module 101 and a first end of the second driving module 103, and a control end of the Data writing module 107 is electrically connected to the second scanning signal input end S2 of the pixel circuit; a first end of the threshold compensation module 108 is electrically connected to a control end of the first driving module 101 and a control end of the second driving module 103, a second end of the threshold compensation module 108 is electrically connected to a second end of the first driving module 101 and a second end of the second driving module 103, and a control end of the threshold compensation module 108 is electrically connected to an input end of the second scan signal S2; a first end of the first light-emitting control module 110 is electrically connected with a first power supply end VDD of the pixel circuit, a second end of the first light-emitting control module 110 is electrically connected with a first end of the first driving module 101, and a control end of the first light-emitting control module 110 is electrically connected with a first enable signal input end EM1 of the pixel circuit; a first end of the second light emitting control module 111 is electrically connected with a second end of the first driving module 101, a second end of the second light emitting control module 111 is electrically connected with a first end of the first light emitting module 102, and a control end of the second light emitting control module 111 is electrically connected with the first enable signal input end EM 1; a first end of the third light-emitting control module 112 is electrically connected to the first power terminal VDD, a second end of the third light-emitting control module 112 is electrically connected to the first end of the second driving module 103, and a control end of the third light-emitting control module 112 is electrically connected to the second enable signal input end EM2 of the pixel circuit; a first end of the fourth light emitting control module 113 is electrically connected with a second end of the second driving module 103, and a second end of the fourth light emitting control module 113 is electrically connected with a first end of the second light emitting module 104; a first end of the first memory module 105 is electrically connected to a first power terminal VDD, and a second end of the first memory module 105 is electrically connected to a control terminal of the first driving module 101; a first terminal of the second memory module 106 is electrically connected to the first power terminal VDD, and a second terminal of the second memory module 106 is electrically connected to the control terminal of the second driving module 103.
Specifically, both the second terminal of the first light emitting module 102 and the second terminal of the second light emitting module 104 may be electrically connected to a second power source terminal VSS of the pixel circuit, the first power source terminal VDD transmits a first level signal, the second power source terminal VSS transmits a second power source signal, the first power source signal and the second power source signal have different high and low levels, the first power source signal may be a high level, and the second power source signal may be a low level; for example, fig. 2 is a schematic circuit diagram of another pixel circuit according to an embodiment of the invention, in which the data writing module 107 includes a first transistor M1, a first terminal of the first transistor M1 is used as a first terminal of the data writing module 107, a second terminal of the first transistor M1 is used as a second terminal of the data writing module 107, and a control terminal of the first transistor M1 is used as a control terminal of the data writing module 107; the first driving module 101 comprises a second transistor M2, a first terminal of the second transistor M2 is used as a first terminal of the first driving module 101, a second terminal of the second transistor M2 is used as a second terminal of the first driving module 101, and a control terminal of the second transistor M2 is used as a control terminal of the first driving module 101; the second driving module 102 includes a third transistor M3, a first terminal of the third transistor M3 is used as a first terminal of the second driving module 102, a second terminal of the third transistor M3 is used as a second terminal of the second driving module 102, and a control terminal of the third transistor M3 is used as a control terminal of the second driving module 102; the threshold compensation module 108 comprises a fourth transistor M4, a first terminal of the fourth transistor M4 is used as a first terminal of the threshold compensation module 108, a second terminal of the fourth transistor M4 is used as a second terminal of the threshold compensation module 108, and a control terminal of the fourth transistor M4 is used as a control terminal of the threshold compensation module 108; the first light emitting control module 110 includes a fifth transistor M5, a first terminal of the fifth transistor M5 is used as a first terminal of the first light emitting control module 110, a second terminal of the fifth transistor M5 is used as a second terminal of the first light emitting control module 110, and a control terminal of the fifth transistor M5 is used as a control terminal of the first light emitting control module 110; the second light emitting control module 111 includes a sixth transistor M6, a first terminal of the sixth transistor M6 is used as the first terminal of the second light emitting control module 111, a second terminal of the sixth transistor M6 is used as the second terminal of the second light emitting control module 111, and a control terminal of the sixth transistor M6 is used as the control terminal of the second light emitting control module 111; the third lighting control module 112 includes a seventh transistor M7, a first terminal of the seventh transistor M7 is used as the first terminal of the third lighting control module 112, a second terminal of the seventh transistor M7 is used as the second terminal of the third lighting control module 112, and a control terminal of the seventh transistor M7 is used as the control terminal of the third lighting control module 112; the fourth light emitting control module 113 includes an eighth transistor M8, a first terminal of the eighth transistor M8 is used as a first terminal of the fourth light emitting control module 113, a second terminal of the eighth transistor M8 is used as a second terminal of the fourth light emitting control module 113, and a control terminal of the eighth transistor M8 is used as a control terminal of the fourth light emitting control module 113; the first initialization module 108 includes a ninth transistor M9, a first terminal of the ninth transistor M9 is a first terminal of the fourth light emission control module 113, a second terminal of the ninth transistor M9 is a second terminal of the first initialization module 108, and a control terminal of the ninth transistor M9 is a control terminal of the first initialization module 108; the second initialization module 109 includes a tenth transistor M10, a first terminal of the tenth transistor M10 is used as the first terminal of the second initialization module 109, a second terminal of the tenth transistor M10 is used as the second terminal of the second initialization module 109, and a control terminal of the tenth transistor M10 is used as the control terminal of the second initialization module 109; the first memory module 105 comprises a first capacitor C1, a first terminal of the first capacitor C1 is used as a first terminal of the first memory module 105, and a second terminal of the first capacitor C1 is used as a second terminal of the first memory module 105; the second memory module 106 includes a second capacitor C2, a first terminal of the second capacitor C2 is used as a first terminal of the second memory module 106, and a second terminal of the second capacitor C2 is used as a second terminal of the second memory module 106.
Specifically, the first transistor M1, the second transistor M2, the third transistor M3, the fourth transistor M4, the fifth transistor M5, the sixth transistor M6, the seventh transistor M7, the eighth transistor M8, the ninth transistor M9, and the tenth transistor M10 may be P-type transistors, but may also be N-type transistors in other embodiments, and all P-type transistors are exemplified in this embodiment; wherein, the fourth transistor M4 and the ninth transistor M9 may be double gate transistors to reduce leakage current;
fig. 3 is a timing diagram of a pixel circuit according to an embodiment of the present invention, which may correspond to the pixel circuit shown in fig. 2, in this embodiment, the first light emitting module 102 and the second light emitting module 104 are driven to emit light at different times, so as to implement time-sharing driving of the first light emitting module 102 and the second light emitting module 104, and implement real high PPI display in the transparent display area;
as shown in fig. 3, the driving method of the pixel circuit may include:
a first initialization stage T11, in which the first scan signal input terminal S1 is at a low level, the second scan signal input terminal S2, the first enable signal input terminal EM1 and the second enable signal input terminal EM2 are at a high level, the first initialization module 108 and the second initialization module 109 are turned on, and the initialization signal input by the initialization signal input terminal Vint initializes the control terminal of the first driving module 101 and the first terminal of the first light emitting module 102; it should be noted that, if there is a large difference between the performances of the first driving module 101 and the second driving module 103, the input initialization signal may correspond to the initialization signal of the first driving module 101 at this time, so as to ensure that the first driving module 101 can be turned on in the first data writing stage;
a first data writing phase T12, in which the second scan signal input terminal S2 is at low level, the first scan signal input terminal S1, the first enable signal input terminal EM1 and the second enable signal input terminal EM2 are all at high level, the data writing module 107 is turned on, meanwhile, the first driving module 101 and the threshold compensation module 108 are turned on, the first Data voltage inputted from the Data signal output terminal Data is written into the control terminal of the first driving module 101 after passing through the Data writing module 107, the first driving module 101 and the threshold compensation module 108, when the difference between the voltage of the control terminal of the first driving module 101 and the voltage of the first terminal thereof is the threshold voltage of the first driving module 101, the threshold compensation module 108 is turned off, so that the potential finally written to the control terminal of the first driving module 101 contains the threshold voltage information of the first driving module 101, so that the driving current generated by the first driving module 101 at the time of final light emission is independent of the threshold voltage of the first driving module 101;
a first light-emitting period T13, in which the first enable signal input end EM1 is at a low level and the second enable signal input end EM2 is at a high level, so as to control the first light-emitting control module 110 and the second light-emitting control module 111 to be turned on, provide a current path for the first light-emitting module 102, and control the first light-emitting module 102 to emit light; at this time, the third light-emitting control module 112 and the fourth light-emitting control module 113 are turned off, and the second light-emitting module 104 does not emit light;
a second initialization stage T21, in which the first scan signal input terminal S1 is at a low level, the second scan signal input terminal S2, the first enable signal input terminal EM1 and the second enable signal input terminal EM2 are at a high level, the first initialization module 108 and the second initialization module 109 are turned on, and the initialization signal input by the initialization signal input terminal Vint initializes the control terminal of the second driving module 103 and the first terminal of the second light emitting module 104; it should be noted that, if there is a large difference between the performances of the first driving module 101 and the second driving module 103, the input initialization signal may correspond to the initialization signal of the second driving module 103 at this time, so as to ensure that the second driving module 103 can be turned on in the first data writing stage;
a second data writing phase T22, in which the second scan signal input terminal S2 is at low level, the first scan signal input terminal S1, the first enable signal input terminal EM1 and the second enable signal input terminal EM2 are all at high level, the data writing module 107 is turned on, meanwhile, the second driving module 103 and the threshold compensation module 108 are turned on, the second Data voltage inputted from the Data signal output terminal Data is written into the control terminal of the second driving module 103 after passing through the Data writing module 107, the second driving module 103 and the threshold compensation module 108, when the difference between the voltage of the control terminal of the second driving module 103 and the voltage of the first terminal thereof is the threshold voltage of the second driving module 103, the threshold compensation module 108 is turned off, so that the potential finally written to the control terminal of the second driving module 103 contains the threshold voltage information of the second driving module 103, so that the driving current generated by the second driving module 103 at the time of final light emission is independent of the threshold voltage of the second driving module 103;
a second light-emitting period T23, in which the second enable signal input end EM2 is at a low level and the first enable signal input end EM1 is at a high level, so as to control the third light-emitting control module 112 and the fourth light-emitting control module 113 to be turned on, provide a current path for the second light-emitting module 104, and control the second light-emitting module 104 to emit light; at this time, the first light-emitting control module 110 and the second light-emitting control module 111 are turned off, and the first light-emitting module 102 does not emit light;
therefore, time-sharing driving of the first light emitting module 102 and the second light emitting module 104 is realized, and real high PPI display of the transparent display region is realized.
Alternatively, fig. 4 is a timing diagram of another pixel circuit according to an embodiment of the present invention, which may correspond to the pixel circuit shown in fig. 2, and with reference to fig. 2 and fig. 4, the driving timing of the pixel circuit may include:
an initialization stage T1, in which a low level signal is input from the first scan signal input terminal S1, the second scan signal input terminal S2, the first enable signal input terminal EM1 and the second enable signal input terminal EM2 are all high levels, that is, the first initialization module 108 is turned on, the second initialization module 109 is turned on, the rest of the modules are turned off, and the initialization signal input from the initialization signal input terminal Vint initializes the first light emitting module 102, the second light emitting module 104, the control terminal of the first driving module 101 and the control terminal of the second driving module 103;
a Data writing phase T2, in which the input signal of the first scan signal input terminal S1 is at a high level, the input signal of the second scan signal input terminal S2 is at a low level, the first enable signal input terminal EM1 and the second enable signal input terminal EM2 both input high level signals, the Data writing module 107 is turned on, and due to the initialization function of the initialization phase, the first driving module 101 and the second driving module 103 are both turned on, the Data signal input by the Data signal output terminal Data is written into the control terminal of the first driving module 101 after passing through the Data writing module 107, the first driving module 101 and the threshold compensation module 108, when the difference between the potential of the control terminal of the first driving module 101 and the potential of the first terminal thereof is the threshold voltage of the first driving module 101, the threshold compensation module 108 is turned off, so that the potential finally written into the control terminal of the first driving module 101 contains the threshold voltage information of the first driving module 101, so that the driving current generated by the first driving module 101 at the time of final light emission is independent of the threshold voltage of the first driving module 101; meanwhile, a Data signal input by the Data signal output end Data is written into the control end of the second driving module 103 after passing through the Data writing module 107, the second driving module 103 and the threshold compensation module 108, when the potential difference value between the potential of the control end of the second driving module 103 and the potential of the first end of the second driving module is the threshold voltage of the second driving module 103, the threshold compensation module 108 is turned off, so that the potential finally written into the control end of the second driving module 103 contains the threshold voltage information of the second driving module 103, and the driving current generated by the second driving module 103 during final light emission is unrelated to the threshold voltage of the second driving module 103; in this embodiment, the threshold voltages of the first driving module 101 and the second driving module 103 are approximately the same, and the Data signal input from the Data signal output terminal Data is used as both the first Data voltage and the second Data voltage.
In the light emitting period T3, the first scan signal input terminal S1 and the second scan signal input terminal S2 are both at a high level, and the first enable signal input terminal EM1 and the second enable signal input terminal EM2 are both at a low level, so that the first light emitting control module 110, the second light emitting control module 111, the third light emitting control module 112 and the fourth light emitting control module 113 are turned on to provide a current path for the first light emitting module 102 and the second light emitting module 104, thereby controlling the first light emitting module 102 and the second light emitting module 104 to emit light simultaneously.
The driving method of the pixel circuit of this embodiment is used for driving the pixel circuit provided in any embodiment of the present invention, and has the same beneficial effects as the pixel circuit, and details are not repeated here.
An embodiment of the present invention further provides a driving method of a pixel circuit, as shown in fig. 5, fig. 5 is a flowchart of the driving method of the pixel circuit provided in the embodiment of the present invention, and the pixel circuit may be a pixel circuit provided in any embodiment of the present invention, where the driving method includes:
step S601, in a first data writing stage, controlling a data writing module to write a first data voltage into a control end of a first driving module;
step S602, in a first light-emitting stage, controlling a first light-emitting module to emit light;
step S603, in the second data writing stage, controlling the data writing module to write the second data voltage into the control end of the second driving module;
step S604, in the second light-emitting stage, controlling the second light-emitting module to emit light;
specifically, the driving method of the pixel circuit of the present embodiment may correspond to the timing chart shown in fig. 4, and for a specific working process, reference may be made to the description of the portion of fig. 4 in the present invention, which is not repeated herein. Preferably, before the first data writing phase, the method further comprises: in the first initialization stage, the first initialization module is controlled to initialize the first driving module, and the second initialization module is controlled to initialize the first light-emitting module; before the second data writing phase, the method further comprises the following steps: and in the second initialization stage, the second initialization module is controlled to initialize the second driving module, and the second initialization module is controlled to initialize the second light-emitting module.
The driving method of the pixel circuit of this embodiment is used for driving the pixel circuit provided in any embodiment of the present invention, and has the same beneficial effects as the pixel circuit, and details are not repeated here.
An embodiment of the present invention further provides a driving method of a pixel circuit, as shown in fig. 6, fig. 6 is a flowchart of another driving method of a pixel circuit provided in an embodiment of the present invention, where the pixel circuit may be a pixel circuit provided in any embodiment of the present invention, and the driving method includes:
step S501, in the data writing stage, controlling the data writing module to write the first data voltage into the control end of the first driving module, and simultaneously controlling the data writing module to write the second data voltage into the control end of the second driving module; wherein the first data voltage is the same as the second data voltage;
step S502, in the light emitting stage, controlling the first light emitting module and the second light emitting module to emit light simultaneously.
Specifically, the driving method of the pixel circuit of the present embodiment may correspond to the timing chart shown in fig. 3, and for a specific working process, reference may be made to the description of the portion of fig. 3 in the present invention, which is not repeated herein. Preferably, before the data writing phase, the method further comprises:
and in the initialization stage, the first initialization module is controlled to initialize the first driving module and the second driving module, and the second initialization module is controlled to initialize the first light-emitting module and the second light-emitting module at the same time.
Fig. 7 is a schematic structural diagram of a display panel according to an embodiment of the present invention, where the display panel includes a pixel circuit according to any embodiment of the present invention, and the display panel includes a transparent display area 702 and a main display area 701, and the pixel circuit is disposed in the transparent display area.
Specifically, the main display area 701 is mainly used for displaying main content on a picture, and the transparent display area 702 is also used for preventing a camera from being under a screen besides being used for displaying partial content of the picture, and the display panel may be, for example, a display panel on a mobile phone, a tablet computer, a smart watch, an MP3, an MP4, a smart helmet, or other wearable devices.
Optionally, fig. 8 is a cross-sectional view of a display panel according to an embodiment of the present invention, and referring to fig. 8, a first driving module 101 is disposed corresponding to a first light emitting module 102, and a second driving module 103 is disposed corresponding to a second light emitting module 104.
Specifically, in the present embodiment, the first driving module 101 is correspondingly disposed corresponding to the first light-emitting module 102, which means that along the thickness direction of the display panel, the projection of the first driving module 101 overlaps with the projection of the first light-emitting unit 102 by a relatively large amount, for example, more than 80% of the area of the projection of the first driving module 101 is covered by the projection of the first light-emitting unit 102; the second driving module 103 is correspondingly disposed corresponding to the second light emitting module 104, which means that along the thickness direction of the display panel, the projection of the second driving module 103 overlaps with the projection of the second light emitting unit 104 to a greater extent, for example, more than 80% of the area of the projection of the second driving module 103 is covered by the projection of the second light emitting unit 104; by the arrangement, the length difference between the lead (the anode wiring of the first light-emitting module) between the first driving module and the first light-emitting module and the length difference between the lead (the anode wiring of the second light-emitting module) between the second driving module and the second light-emitting module can be reduced, so that the resistance difference caused by the anode wiring difference is avoided, and the display effect is improved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. A pixel circuit, comprising:
the first driving module is used for generating a first driving current; a first light emitting module for emitting light in response to the first driving current; the second driving module is used for generating a second driving current; the second light-emitting module is used for responding to the second driving current to emit light; the first storage module is used for maintaining the electric potential of the control end of the first driving module; the second storage module is used for maintaining the electric potential of the control end of the second driving module;
the data writing module is used for writing a first data voltage into the control end of the first driving module and writing a second data voltage into the control end of the second driving module;
and the threshold compensation module is used for compensating the threshold voltages of the second driving module and the first driving module in a data writing stage.
2. The pixel circuit according to claim 1, further comprising:
a first initialization module, a first end of which is electrically connected to an initialization signal input end of the pixel circuit, a second end of which is electrically connected to a control end of the first driving module and a control end of the second driving module, and a control end of which is electrically connected to a first scanning signal input end of the pixel circuit;
a second initialization module, a first end of which is electrically connected to the initialization signal input end, a second end of which is electrically connected to the first end of the first light emitting module and the first end of the second light emitting module, and a control end of which is electrically connected to the first scanning signal input end.
3. The pixel circuit according to claim 2, further comprising: the lighting control system comprises a first lighting control module, a second lighting control module, a third lighting control module and a fourth lighting control module;
the first end of the data writing module is electrically connected with the data signal input end of the pixel circuit, the second end of the data writing module is electrically connected with the first end of the first driving module and the first end of the second driving module, and the control end of the data writing module is electrically connected with the second scanning signal input end of the pixel circuit;
a first end of the threshold compensation module is electrically connected with a control end of the first driving module and a control end of the second driving module, a second end of the threshold compensation module is electrically connected with a second end of the first driving module and a second end of the second driving module, and a control end of the threshold compensation module is electrically connected with the second scanning signal input end;
the first end of the first light-emitting control module is electrically connected with a first power end of the pixel circuit, the second end of the first light-emitting control module is electrically connected with the first end of the first driving module, and the control end of the first light-emitting control module is electrically connected with a first enable signal input end of the pixel circuit;
a first end of the second light emitting control module is electrically connected with a second end of the first driving module, a second end of the second light emitting control module is electrically connected with a first end of the first light emitting module, and a control end of the second light emitting control module is electrically connected with the first enable signal input end;
a first end of the third light-emitting control module is electrically connected with the first power end, a second end of the third light-emitting control module is electrically connected with a first end of the second driving module, and a control end of the third light-emitting control module is electrically connected with a second enable signal input end of the pixel circuit;
a first end of the fourth light-emitting control module is electrically connected with a second end of the second driving module, and a second end of the fourth light-emitting control module is electrically connected with a first end of the second light-emitting module;
the first end of the first storage module is electrically connected with the first power supply end, and the second end of the first storage module is electrically connected with the control end of the first driving module;
the first end of the second storage module is electrically connected with the first power supply end, and the second end of the second storage module is electrically connected with the control end of the second driving module.
4. The pixel circuit according to claim 3, wherein the data writing module comprises a first transistor, a first terminal of the first transistor is used as a first terminal of the data writing module, a second terminal of the first transistor is used as a second terminal of the data writing module, and a control terminal of the first transistor is used as a control terminal of the data writing module;
the first driving module comprises a second transistor, a first end of the second transistor is used as a first end of the first driving module, a second end of the second transistor is used as a second end of the first driving module, and a control end of the second transistor is used as a control end of the first driving module;
the second driving module comprises a third transistor, a first end of the third transistor is used as a first end of the second driving module, a second end of the third transistor is used as a second end of the second driving module, and a control end of the third transistor is used as a control end of the second driving module;
the threshold compensation module comprises a fourth transistor, wherein a first end of the fourth transistor is used as a first end of the threshold compensation module, a second end of the fourth transistor is used as a second end of the threshold compensation module, and a control end of the fourth transistor is used as a control end of the threshold compensation module;
the first light emitting control module comprises a fifth transistor, wherein a first end of the fifth transistor is used as a first end of the first light emitting control module, a second end of the fifth transistor is used as a second end of the first light emitting control module, and a control end of the fifth transistor is used as a control end of the first light emitting control module;
the second light-emitting control module comprises a sixth transistor, a first end of the sixth transistor is used as a first end of the second light-emitting control module, a second end of the sixth transistor is used as a second end of the second light-emitting control module, and a control end of the sixth transistor is used as a control end of the second light-emitting control module;
the third light emitting control module comprises a seventh transistor, a first end of the seventh transistor is used as a first end of the third light emitting control module, a second end of the seventh transistor is used as a second end of the third light emitting control module, and a control end of the seventh transistor is used as a control end of the third light emitting control module;
the fourth light emitting control module comprises an eighth transistor, a first end of the eighth transistor is used as a first end of the fourth light emitting control module, a second end of the eighth transistor is used as a second end of the fourth light emitting control module, and a control end of the eighth transistor is used as a control end of the fourth light emitting control module;
the first initialization module comprises a ninth transistor, a first end of the ninth transistor is used as a first end of the fourth light emitting control module, a second end of the ninth transistor is used as a second end of the first initialization module, and a control end of the ninth transistor is used as a control end of the first initialization module;
the second initialization module comprises a tenth transistor, a first terminal of the tenth transistor is used as a first terminal of the second initialization module, a second terminal of the tenth transistor is used as a second terminal of the second initialization module, and a control terminal of the tenth transistor is used as a control terminal of the second initialization module;
the first storage module comprises a first capacitor, a first end of the first capacitor is used as a first end of the first storage module, and a second end of the first capacitor is used as a second end of the first storage module;
the second storage module comprises a second capacitor, a first end of the second capacitor is used as a first end of the second storage module, and a second end of the second capacitor is used as a second end of the second storage module.
5. A driving method of a pixel circuit, the pixel circuit comprising: the first driving module is used for generating a first driving current; a first light emitting module for emitting light in response to the first driving current; the second driving module is used for generating a second driving current; the second light-emitting module is used for responding to the second driving current to emit light; the first storage module is used for maintaining the electric potential of the control end of the first driving module; the second storage module is used for maintaining the electric potential of the control end of the second driving module; the data writing module is used for writing a first data voltage into the control end of the first driving module and writing a second data voltage into the control end of the second driving module; the threshold compensation module is used for capturing the threshold voltage of the first driving module to the control end of the first driving module and capturing the threshold voltage of the second driving module to the control end of the second driving module;
the driving method includes:
in a first data writing stage, controlling the data writing module to write a first data voltage into a control end of the first driving module;
in a first light-emitting stage, controlling the first light-emitting module to emit light;
in a second data writing stage, controlling the data writing module to write a second data voltage into the control end of the second driving module;
and in a second light-emitting stage, controlling the second light-emitting module to emit light.
6. The driving method according to claim 5, wherein the pixel circuit further comprises: a first initialization module, a first end of which is electrically connected to an initialization signal input end of the pixel circuit, a second end of which is electrically connected to a control end of the first driving module and a control end of the second driving module, and a control end of which is electrically connected to a first scanning signal input end of the pixel circuit; a second initialization module, a first end of which is electrically connected to the initialization signal input end, a second end of which is electrically connected to the first end of the first light emitting module and the first end of the second light emitting module, and a control end of which is electrically connected to the first scanning signal input end;
before the first data writing phase, the method further comprises the following steps:
a first initialization stage, which is used for controlling the first initialization module to initialize the first driving module and simultaneously controlling the second initialization module to initialize the first light-emitting module;
before the second data writing phase, the method further comprises:
and in the second initialization stage, the second initialization module is controlled to initialize the second driving module, and the second initialization module is simultaneously controlled to initialize the second light-emitting module.
7. A driving method of a pixel circuit, the pixel circuit comprising: the first driving module is used for generating a first driving current; a first light emitting module for emitting light in response to the first driving current; the second driving module is used for generating a second driving current; the second light-emitting module is used for responding to the second driving current to emit light; the first storage module is used for maintaining the electric potential of the control end of the first driving module; the second storage module is used for maintaining the electric potential of the control end of the second driving module; the data writing module is used for writing a first data voltage into the control end of the first driving module and writing a second data voltage into the control end of the second driving module; the threshold compensation module is used for capturing the threshold voltage of the first driving module to the control end of the first driving module and capturing the threshold voltage of the second driving module to the control end of the second driving module;
the driving method includes:
in a data writing stage, controlling the data writing module to write a first data voltage into a control end of the first driving module, and simultaneously controlling the data writing module to write a second data voltage into a control end of the second driving module; wherein the first data voltage is the same as the second data voltage;
and in the light emitting stage, controlling the first light emitting module and the second light emitting module to emit light simultaneously.
8. The driving method according to claim 7, wherein the pixel circuit further comprises: a first initialization module, a first end of which is electrically connected to an initialization signal input end of the pixel circuit, a second end of which is electrically connected to a control end of the first driving module and a control end of the second driving module, and a control end of which is electrically connected to a first scanning signal input end of the pixel circuit; a second initialization module, a first end of which is electrically connected to the initialization signal input end, a second end of which is electrically connected to the first end of the first light emitting module and the first end of the second light emitting module, and a control end of which is electrically connected to the first scanning signal input end;
before the data writing phase, the method further comprises the following steps:
and in the initialization stage, the first initialization module is controlled to initialize the first driving module and the second driving module, and the second initialization module is controlled to initialize the first light-emitting module and the second light-emitting module at the same time.
9. A display panel comprising the pixel circuit according to any one of claims 1 to 4, the display panel comprising a transparent display region and a main display region; the pixel circuit is arranged in the transparent display area.
10. The display panel according to claim 9, wherein the first driving module is disposed corresponding to the first light emitting module, and the second driving module is disposed corresponding to the second light emitting module.
CN202110832704.5A 2021-07-22 2021-07-22 Pixel circuit, driving method thereof and display panel Pending CN113487998A (en)

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CN1779767A (en) * 2004-11-22 2006-05-31 三星Sdi株式会社 Pixel and luminescent display device
CN103474024A (en) * 2013-09-06 2013-12-25 京东方科技集团股份有限公司 Pixel circuit and displayer
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US20160019844A1 (en) * 2014-07-18 2016-01-21 Samsung Display Co., Ltd. Organic light emitting display and driving method thereof
CN109473061A (en) * 2017-09-08 2019-03-15 京东方科技集团股份有限公司 Pixel compensation circuit unit, pixel circuit and display device
CN111063301A (en) * 2020-01-09 2020-04-24 京东方科技集团股份有限公司 Pixel circuit, driving method thereof, array substrate and display device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1779767A (en) * 2004-11-22 2006-05-31 三星Sdi株式会社 Pixel and luminescent display device
CN103474024A (en) * 2013-09-06 2013-12-25 京东方科技集团股份有限公司 Pixel circuit and displayer
US20160012779A1 (en) * 2014-07-14 2016-01-14 Samsung Display Co., Ltd. Pixel circuit and organic light emitting display including the same
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Application publication date: 20211008