CN114023237B - Pixel circuit and display panel - Google Patents
Pixel circuit and display panel Download PDFInfo
- Publication number
- CN114023237B CN114023237B CN202111340310.4A CN202111340310A CN114023237B CN 114023237 B CN114023237 B CN 114023237B CN 202111340310 A CN202111340310 A CN 202111340310A CN 114023237 B CN114023237 B CN 114023237B
- Authority
- CN
- China
- Prior art keywords
- light emitting
- pixel circuit
- emitting device
- compensation
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 135
- 239000002184 metal Substances 0.000 claims description 112
- 239000003086 colorant Substances 0.000 claims description 40
- 239000000758 substrate Substances 0.000 claims description 21
- 230000008878 coupling Effects 0.000 abstract description 13
- 238000010168 coupling process Methods 0.000 abstract description 13
- 238000005859 coupling reaction Methods 0.000 abstract description 13
- 238000010586 diagram Methods 0.000 description 15
- 230000000694 effects Effects 0.000 description 4
- 208000032005 Spinocerebellar ataxia with axonal neuropathy type 2 Diseases 0.000 description 3
- 208000033361 autosomal recessive with axonal neuropathy 2 spinocerebellar ataxia Diseases 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
Abstract
The embodiment of the invention discloses a pixel circuit and a display panel, wherein a capacitance compensation module comprises at least one compensation capacitor, a first polar plate of the compensation capacitor is connected with a first polar plate of a light-emitting device, a second polar plate of the compensation capacitor is connected with a fixed voltage, which is equivalent to increasing the coupling capacitance of a first polar node and an internal structure of the pixel circuit or the coupling capacitance between the first polar node and a signal line connected with the pixel circuit and/or the coupling capacitance between the pixel circuit internal structure and the signal line connected with the pixel circuit, so that the total capacitance at the first polar node of the light-emitting device is increased, a driving transistor in the pixel circuit needs to be turned on to complete the charging of the light-emitting device, and the light-emitting device can be turned on only when the light-emitting device is turned off, therefore, the data voltage (namely black state voltage) provided for the driving transistor can be reduced, and the power consumption of the display panel can be reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a pixel circuit and a display panel.
Background
With the development of display technology, the problem of power consumption of a display panel has been attracting more and more attention.
In the conventional display panel, a pixel circuit and a light emitting device are generally included, and a driving current is supplied to the light emitting device through the pixel circuit to drive the light emitting device to emit light. When the light emitting device is controlled to be turned off, a black state voltage needs to be supplied to the driving transistor in the pixel circuit to disable the pixel circuit from turning on the light emitting device.
The black voltage is related to the total capacitance at the anode node of the light emitting device, and the total capacitance at the anode node in the existing pixel circuit is smaller, so that the black voltage is larger, and the power consumption of the display panel is larger.
Disclosure of Invention
The invention provides a pixel circuit and a display panel, which are used for reducing the black state voltage of the driving pixel circuit and saving the power consumption of the display panel.
In a first aspect, an embodiment of the present invention provides a pixel circuit, including: the driving module, the capacitance compensation module, the first power supply voltage input end, the second power supply voltage input end and the driving current output end are connected with at least one light emitting device;
the driving module is connected with a first pole of the light emitting device through a driving current output end of the pixel circuit, and the driving module and the light emitting device are connected between a first power supply voltage input end and a second power supply voltage input end;
The capacitance compensation module comprises at least one compensation capacitor, a first polar plate of the compensation capacitor is electrically connected with a first pole of the light-emitting device, and a second polar plate of the compensation capacitor is connected with a fixed voltage;
in the planar topological structure of the pixel circuit, the compensation capacitor is positioned at one side of the first pole node far away from the driving module and/or at one side of the first pole node close to the power line, and the power line is connected with the first power supply voltage input end; wherein the first pole node comprises at least part of the connection line between the drive current output and the first pole of the light emitting device.
Optionally, the capacitance compensation module includes a first compensation capacitor, a first polar plate of the first compensation capacitor is electrically connected with a first pole of the light emitting device, and a second polar plate of the first compensation capacitor is electrically connected with the first power supply voltage input end;
optionally, in the planar topology of the pixel circuit, the first compensation capacitor is located at a side of the first pole node close to the power line.
Optionally, the pixel circuit further includes an initialization module and an initialization voltage input end, the initialization voltage input end is connected to the initialization signal line, and the initialization module is used for writing the initialization voltage into the control end of the driving module and/or the first pole of the light emitting device in the initialization stage;
Optionally, in the planar topology structure of the pixel circuit, the capacitance compensation module further includes a second compensation capacitor, a first polar plate of the second compensation capacitor is electrically connected with the first pole of the light emitting device, and a second polar plate of the second compensation capacitor is electrically connected with the initialization voltage input end;
the second compensation capacitor is positioned on one side of the first electrode node away from the driving module.
Optionally, the pixel circuit further includes a data writing module, where the data writing module is configured to write a data voltage to a control end of the driving module in a data writing stage;
optionally, the pixel circuit further includes a light emitting control module, where the light emitting control module is configured to control a conduction state between the first power supply voltage input end and the first end of the driving module and/or between the second end of the driving module and the first pole of the light emitting device;
optionally, the light-emitting control module includes a first light-emitting control transistor and a second light-emitting control transistor, the first light-emitting control transistor is connected between the first power supply voltage input end and the first end of the driving module, the first pole of the second light-emitting control transistor is electrically connected with the second end of the driving module, the second pole of the second light-emitting control transistor is electrically connected with the first pole of the light-emitting device, and the second pole of the second light-emitting control transistor is used as the driving current output end;
Optionally, the driving module includes a driving transistor, and the pixel circuit further includes a threshold voltage compensation module for writing information including a threshold voltage of the driving transistor to a gate of the driving transistor in a data writing stage;
optionally, the pixel circuit further includes a storage module, where the storage module is configured to store a control terminal voltage of the driving module.
In a second aspect, embodiments of the present invention further provide a display panel, including the pixel circuit of the first aspect.
Optionally, the display panel includes a substrate;
a pixel circuit layer located at one side of the substrate, the pixel circuit layer including a plurality of pixel circuits;
a pixel defining layer located on a side of the pixel circuit layer away from the substrate, the pixel defining layer including a plurality of openings;
a light emitting device layer comprising at least two light emitting devices of different colors, the light emitting layer of the light emitting device being located in the opening;
optionally, the pixel circuit layer includes an active layer, a first metal layer, a second metal layer, and a third metal layer stacked on one side of the substrate;
the first metal layer comprises a light-emitting control signal wire which is electrically connected with the control end of the light-emitting control module; the second metal layer comprises an initialization signal wire which is electrically connected with the initialization input end; the third metal layer comprises a power line;
The light-emitting control signal line and the initialization signal line extend along a first direction, the power line extends along a second direction, and the first direction intersects the second direction; the first electrode node is positioned between an initialization signal line which is connected with the light-emitting control signal line and is adjacent to one side of a driving module in a pixel circuit which is connected with the light-emitting control signal line and is far away from the light-emitting control signal line;
alternatively, the respective openings of the light emitting devices of at least two different emission colors are different in size.
Optionally, the pixel circuits to which the light emitting devices of different light emission colors are connected are different;
the total capacitance value of each compensation capacitor included in the capacitance compensation module in the pixel circuit connected with the light emitting devices with different light emitting colors is equal;
or the total capacitance values of the compensation capacitors included in the capacitance compensation modules in the pixel circuits connected with the light emitting devices with at least two different light emitting colors are not equal; preferably, the larger the opening corresponding to the light emitting device is, the smaller the total capacitance value of each compensation capacitor of the capacitance compensation module in the pixel circuit connected with the light emitting device is; or the pixel circuits and the light emitting devices are arranged in an array manner, the light emitting devices with at least two light emitting colors are positioned in the same column, the display panel further comprises a plurality of data lines extending along the second direction, wherein the larger the opening corresponding to the light emitting device is in the light emitting devices with different light emitting colors driven by the pixel circuits connected with the same data line, the smaller the total capacitance value of the compensation capacitor included in the capacitance compensation module in the pixel circuit connected with the light emitting device is.
Optionally, the second metal layer further includes a first metal portion, where the first metal portion is connected between the light emission control signal line and an initialization signal line adjacent to a side of the light emission control signal line, which is far away from a driving module in the pixel circuit connected with the first metal portion, and one end of the first metal portion, which is close to the first electrode node, is electrically connected with the first electrode node;
the active layer comprises a first active part, and one side of the first active part, which is close to the power line, is electrically connected with the power line; the first metal part and the first active part are overlapped to form a first compensation capacitor;
preferably, the third metal layer further comprises a second metal portion, and the first metal portion is electrically connected to the first pole node through the second metal portion.
Optionally, the pixel circuit layer further includes a fourth metal layer on a side of the third metal layer away from the substrate; the fourth metal layer comprises a third metal part, the third metal part is positioned at one side of the light-emitting control signal line far away from the driving module in the pixel circuit connected with the third metal part, and at least part of the third metal part is overlapped with the initialization signal line to form a second compensation capacitor;
optionally, the third metal portion includes a first sub-metal portion extending along the first direction and a second sub-metal portion extending along the second direction, where the first sub-metal portion overlaps the initialization signal line to form a second compensation capacitor, and the second sub-metal portion connects the first sub-metal portion and the first pole node.
Optionally, the display panel includes a first color light emitting device, a second color light emitting device, and a third color light emitting device, where the opening corresponding to the first color light emitting device is smaller than the opening corresponding to the second color light emitting device, and the opening corresponding to the second color light emitting device is smaller than the opening corresponding to the third color light emitting device;
the capacitance compensation module in the pixel circuit connected with the first color light emitting device comprises a first compensation capacitance and a second compensation capacitance; the capacitance compensation modules in the pixel circuit connected with the second color light emitting device and the pixel circuit connected with the third color light emitting device respectively comprise one of a first compensation capacitor and a second compensation capacitor, and the capacitance value of the compensation capacitor included in the pixel circuit connected with the second color light emitting device is larger than that of the compensation capacitor included in the pixel circuit connected with the third color light emitting device.
According to the pixel circuit and the display panel provided by the embodiment of the invention, the capacitance compensation module comprises at least one compensation capacitor, the first polar plate of the compensation capacitor is connected with the first pole of the light-emitting device, the second polar plate of the compensation capacitor is connected with the fixed voltage, which is equivalent to increasing the coupling capacitance between the first polar node and the internal structure of the pixel circuit or the coupling capacitance between the first polar node and the signal line connected with the pixel circuit, so that the total capacitance at the first polar node of the light-emitting device is increased, wherein the first polar node can be an anode node, and further, when the pixel circuit charges the light-emitting device, the driving transistor in the pixel circuit can complete charging of the light-emitting device only by being turned on to a larger degree, and therefore, when the driving transistor is a P-type transistor, the data voltage required to be provided for the driving transistor is lower, and correspondingly, the data voltage (namely black voltage) provided for the driving transistor when the light-emitting device is turned off can be reduced, and further, the power consumption of the display panel can be reduced. In the planar topology structure of the pixel circuit, a relatively large space is reserved on one side of the first electrode node, which is far away from the driving transistor, and one side of the first electrode node, which is close to the power line, so that the compensation capacitor is arranged on one side of the first electrode node, which is far away from the driving transistor, and/or one side of the first electrode node, which is close to the power line, and the compensation capacitor is conveniently arranged.
Drawings
Fig. 1 is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a planar topology of a pixel circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of another pixel circuit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of another pixel circuit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a planar topology of another pixel circuit according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of another pixel circuit according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a planar topology of another pixel circuit according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 9 is a cross-sectional view of a display panel according to an embodiment of the present invention;
FIG. 10 is an enlarged view of a portion of FIG. 8;
fig. 11 is a schematic structural diagram of another display panel according to an embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
As described in the background art, in the conventional display panel, when the light emitting device is controlled to be turned off, a black state voltage needs to be supplied to the driving transistor in the pixel circuit to make the pixel circuit unable to light the light emitting device. The black voltage is related to the total capacitance at the anode node of the light emitting device, and the total capacitance at the anode node in the existing pixel circuit is smaller, so that the black voltage is larger, and the power consumption of the display panel is larger. The inventor researches have found that the reason why the above problem occurs is that in the existing pixel circuit, the total capacitance at the anode node generally includes the capacitance of the light emitting device itself, the coupling capacitance between the anode node and the internal structure of the pixel circuit, and/or the coupling capacitance between the anode node and the signal line to which the pixel circuit is connected, and since the influence of the capacitance at the anode node on the black state voltage is not considered in designing the pixel circuit, the coupling capacitance is not designed, so that the capacitance value of the coupling capacitance is smaller, resulting in smaller total capacitance at the anode node. The smaller the total capacitance at the anode node is, the better the pixel circuit charges the anode of the light emitting device, so that the light emitting device can be charged when the opening degree of the driving transistor in the pixel circuit is smaller, and then the light emitting device is lightened, the light emitting device can be lightened by providing relatively higher data voltage for the structure that the driving transistor in the pixel circuit is a P-type transistor, and therefore, the data voltage (namely black state voltage) provided for the driving transistor when the light emitting device is extinguished is also higher, so that the power consumption of the display panel is larger.
For the above reasons, the embodiment of the present invention provides a pixel circuit, fig. 1 is a schematic structural diagram of the pixel circuit provided by the embodiment of the present invention, fig. 2 is a schematic planar topological structure of the pixel circuit provided by the embodiment of the present invention, and referring to fig. 1 and 2, the pixel circuit 100 includes:
the driving module 101, the capacitance compensation module 110, the first power voltage input terminal VDD, the second power voltage input terminal VSS and the driving current output terminal OUT1, wherein the driving current output terminal OUT1 is connected with at least one light emitting device D1;
the driving module 101 is connected with a first pole of the light emitting device D1 through a driving current output end OUT1 of the pixel circuit, and the driving module 101 and the light emitting device D1 are connected between a first power supply voltage input end VDD and a second power supply voltage input end VSS;
the capacitance compensation module 110 comprises at least one compensation capacitor C, a first polar plate of the compensation capacitor C is electrically connected with a first polar of the light emitting device D1, and a second polar plate of the compensation capacitor C is connected with a fixed voltage V0;
in the planar topology of the pixel circuit, the compensation capacitor C is located at a side of the first pole node N1 away from the module 101 and/or at a side of the first pole node N1 close to the power line VDDL, where the power line VDDL is connected to the first power voltage input terminal VDD; wherein the first pole node N1 comprises at least part of the connection line between the driving current output OUT1 and the first pole of the light emitting device D1.
Referring to fig. 1, the driving module 101 may optionally include a driving transistor DT.
The pixel circuit may be formed on a substrate and includes a plurality of film structures, and the planar topology of the pixel circuit may refer to a planar structure formed by orthographic projection of each film structure of the pixel circuit on the substrate. The pixel circuit of this embodiment includes a capacitance compensation module 110, where the capacitance compensation module 110 includes at least one compensation capacitor C, a first polar plate of the compensation capacitor C is connected to a first polar plate of the light emitting device D1, and a second polar plate of the compensation capacitor C is connected to a fixed voltage, which is equivalent to increasing a coupling capacitance between a first polar node and an internal structure of the pixel circuit or a coupling capacitance between the first polar node and a signal line connected to the pixel circuit, so as to increase a total capacitance at the first polar node of the light emitting device D1, where the first polar node may be an anode node, so that when the pixel circuit charges the light emitting device D1, the driving transistor DT in the pixel circuit needs to be turned on to complete charging of the light emitting device D1 to a greater extent, so that when the driving transistor DT is a P-type transistor, a data voltage to be provided to the driving transistor DT is lower, and accordingly, a data voltage (i.e., a black voltage) to be provided to the driving transistor when the light emitting device is turned off is also reduced, so that power consumption of the display panel may be reduced.
And moreover, the second electrode plate of the compensation capacitor C is connected with a fixed voltage, so that the setting of the compensation capacitor C can not influence the potential of the first electrode node of the light-emitting device D1, and the light-emitting brightness of the light-emitting device D1 is ensured to be stable.
In this embodiment, in the planar topology of the pixel circuit, the compensation capacitor C is located on a side of the first pole node away from the driving transistor DT and/or on a side of the first pole node close to the power line VDDL, where the power line VDDL is connected to the first power voltage input terminal VDD. Fig. 2 schematically shows a case where the compensation module includes a compensation capacitor C, and the compensation capacitor C is located on a side of the first pole node N1 near the power line VDDL. In the planar topology of the pixel circuit, a side of the first pole node N1 far from the driving transistor DT and a side of the first pole node near the power line VDDL have relatively large spaces, so that the setting of the compensation capacitor C is facilitated. And, set up compensation capacitor C in first utmost point node N1 and be close to one side of power cord VDDL, can make compensation capacitor C's second polar plate insert fixed voltage more convenient, with compensation capacitor C's second polar plate direct with power cord VDDL be connected.
According to the pixel circuit provided by the embodiment of the invention, the capacitance compensation module comprises at least one compensation capacitor, the first polar plate of the compensation capacitor is connected with the first pole of the light-emitting device, and the second polar plate of the compensation capacitor is connected with a fixed voltage, which is equivalent to increasing the coupling capacitance between the first polar node and the internal structure of the pixel circuit or the coupling capacitance between the first polar node and the signal line connected with the pixel circuit, so that the total capacitance at the first polar node of the light-emitting device is increased, wherein the first polar node can be an anode node, and further, when the pixel circuit charges the light-emitting device, the driving transistor in the pixel circuit can complete charging of the light-emitting device only by being turned on to a larger degree, therefore, when the driving transistor is a P-type transistor, the data voltage required to be provided for the driving transistor is lower, and correspondingly, the data voltage (namely black voltage) provided for the driving transistor when the light-emitting device is turned off can also be reduced, and further, the power consumption of the display panel can be reduced. In the planar topology structure of the pixel circuit, a relatively large space is reserved on one side of the first electrode node, which is far away from the driving transistor, and one side of the first electrode node, which is close to the power line, so that the compensation capacitor is arranged on one side of the first electrode node, which is far away from the driving transistor, and/or one side of the first electrode node, which is close to the power line, and the compensation capacitor is conveniently arranged.
Fig. 3 is a schematic structural diagram of another pixel circuit according to an embodiment of the present invention, and referring to fig. 2 and 3, the capacitance compensation module 110 optionally includes a first compensation capacitor C1, a first electrode plate of the first compensation capacitor C1 is electrically connected to a first electrode of the light emitting device D1, and a second electrode plate of the first compensation capacitor C1 is electrically connected to the first power voltage input terminal VDD;
optionally, in the planar topology of the pixel circuit, the first compensation capacitor C1 is located on a side of the first pole node close to the power line VDDL.
Specifically, the first power supply voltage input terminal VDD is connected to the power supply line VDDL, and the voltage on the power supply line VDDL is fixed, so that the second electrode plate of the first compensation capacitor C1 is electrically connected to the first power supply voltage input terminal VDD, and there is no need to additionally provide a port for providing a fixed voltage to the second electrode plate of the first compensation capacitor C1 in the pixel circuit, and accordingly, there is no need to additionally provide a signal line for transmitting the fixed voltage to the second electrode plate of the first compensation capacitor C1 in the display panel including the pixel circuit, so that the wiring of the display panel can be ensured to be simplified. In the planar topology of the pixel circuit, the first compensation capacitor C1 is located on a side of the first node close to the power line VDDL, so that the second plate of the first compensation capacitor C1 can be conveniently connected to the power line VDDL.
Fig. 4 is a schematic structural diagram of another pixel circuit according to an embodiment of the present invention, and fig. 5 is a schematic planar topological structure of another pixel circuit according to an embodiment of the present invention, and referring to fig. 4 and 5, optionally, the pixel circuit further includes an initialization module 120 and an initialization voltage input terminal Vref, the initialization voltage input terminal Vref is connected to the initialization signal line VRL, and the initialization module 120 is configured to write an initialization voltage to the control terminal of the driving module 101 and/or the first electrode of the light emitting device D1 in an initialization stage;
the capacitance compensation module 110 further includes a second compensation capacitor C2, a first electrode plate of the second compensation capacitor C2 is electrically connected to the first electrode of the light emitting device D1, and a second electrode plate of the second compensation capacitor C2 is electrically connected to the initialization voltage input terminal Vref;
optionally, in the planar topology of the pixel circuit, the second compensation capacitor C2 is located on a side of the first pole node away from the driving module 101.
Referring to fig. 4, a case in which the initialization module 120 includes a first initialization transistor T1 and a second initialization transistor T2 is schematically illustrated in fig. 4, wherein the first initialization transistor T1 is connected between the initialization voltage input terminal Vref and the control terminal of the driving module 101 for writing an initialization voltage to the control terminal of the driving module 101 in an initialization phase, and the second initialization transistor T2 is connected between the initialization voltage input terminal Vref and the first pole of the light emitting device D1 for writing an initialization voltage to the first pole of the light emitting device D1 in the initialization phase.
Specifically, the initialization voltage input terminal Vref is connected to the initialization signal line VRL, and the voltage on the initialization signal line VRL is fixed, so that the second electrode plate of the second compensation capacitor C2 is electrically connected to the initialization voltage input terminal Vref, and there is no need to additionally provide a port for providing a fixed voltage to the second electrode plate of the second compensation capacitor C2 in the pixel circuit, and accordingly, there is no need to additionally provide a signal line for transmitting a fixed voltage to the second electrode plate of the second compensation capacitor C2 in the display panel including the pixel circuit, so that the wiring of the display panel can be ensured to be simplified. In the display panel including the pixel circuit of the present embodiment, the initialization signal line VRL connected to the first electrode node N1 in the pixel circuit is located at a side of the first electrode node N1 away from the driving module 101 in the pixel circuit, and thus is disposed in the planar topology of the pixel circuit, and the second compensation capacitor C2 is located at a side of the first electrode node away from the driving module 101, so that the second plate of the second compensation capacitor C2 can be conveniently connected to the initialization signal line VRL.
Fig. 6 is a schematic structural diagram of another pixel circuit according to an embodiment of the present invention, and fig. 7 is a schematic planar topological structure of another pixel circuit according to an embodiment of the present invention, and referring to fig. 6 and fig. 7, gates of the first initializing transistor T1 and the second initializing transistor T2 are electrically connected to the first Scan signal input terminal Scan1, and the first Scan signal input terminal Scan1 is electrically connected to the first Scan line S1 in the display panel including the pixel circuit according to the embodiment. Optionally, the pixel circuit further includes a data writing module 130, where the data writing module 130 is configured to write the data voltage to the control terminal of the driving module 101 during the data writing phase. Optionally, the data writing module 130 includes a data writing transistor T3, the driving module 101 includes a driving transistor DT, a first pole of the data writing transistor T3 is connected to the data voltage input terminal Vdata, a second pole of the data writing transistor T3 is electrically connected to the first pole of the driving transistor DT, a gate of the data writing transistor T3 is electrically connected to a second Scan signal input terminal Scan2, and the second Scan signal input terminal Scan2 is electrically connected to a second Scan line S2 in the display panel including the pixel circuit of the embodiment.
In which, fig. 6 schematically shows a case where the data writing module 130 is connected to the first electrode of the driving transistor DT, the data writing module 130 writes the data voltage to the gate electrode of the driving transistor DT through the driving transistor DT and the threshold voltage compensation module 150. In other alternative embodiments of the present invention, the pixel circuit may not include the threshold voltage compensation module 150, and the data writing module 130 may be directly electrically connected to the gate of the driving transistor DT.
With continued reference to fig. 6, the optional pixel circuit further includes a light-emitting control module 140, where the light-emitting control module 140 is configured to control a conduction state between the first power supply voltage input terminal VDD and the first terminal of the driving module 101 and/or the second terminal of the driving module 101 and the first electrode of the light-emitting device D1.
Optionally, the light emitting control module 140 includes a first light emitting control transistor T4 and a second light emitting control transistor T5, the first light emitting control transistor T4 is connected between the first power voltage input terminal VDD and the first terminal of the driving module 101, a first pole of the second light emitting control transistor T5 is electrically connected to the second terminal of the driving module 101, a second pole of the second light emitting control transistor T5 is electrically connected to the first pole of the light emitting device D1, and a second pole of the second light emitting control transistor T5 is used as the driving current output terminal OUT1. The gates of the first light emission control transistor T4 and the second light emission control transistor T5 are electrically connected to a light emission control signal input terminal Emit electrically connected to a light emission control signal line EML in a display panel including the pixel circuit of the present embodiment.
Optionally, the driving module 101 comprises a driving transistor DT, and the pixel circuit further comprises a threshold voltage compensation module 150, the threshold voltage compensation module 150 being configured to write information comprising the threshold voltage of the driving transistor DT to the gate of the driving transistor DT during the data writing phase. Optionally, the threshold voltage compensation module 150 includes a compensation transistor T6, wherein a gate of the compensation transistor T6 is electrically connected to the second Scan signal input Scan2, a first pole of the compensation transistor T6 is electrically connected to a second pole of the driving transistor DT, and a second pole of the compensation transistor T6 is electrically connected to the gate of the driving transistor DT.
Optionally, the pixel circuit further includes a storage module 160, where the storage module 160 is configured to store the control terminal voltage of the driving module 101. Optionally, the storage module 160 includes a storage capacitor Cst.
The case where the pixel circuit includes both the first compensation capacitor C1 and the second compensation capacitor C2 is schematically illustrated in fig. 6 and 7, and the pixel circuit may further include one of the first compensation capacitor C1 and the second compensation capacitor C2.
The embodiment of the invention also provides a display panel, and fig. 8 is a schematic structural diagram of the display panel provided by the embodiment of the invention, where the display panel includes the pixel circuit according to any of the above embodiments of the invention.
Fig. 9 is a cross-sectional view of a display panel according to an embodiment of the present invention, and referring to fig. 9, an alternative display panel includes:
a substrate 210;
a pixel circuit layer 220 located at one side of the substrate 210, the pixel circuit layer 220 including a plurality of pixel circuits;
a pixel defining layer 230 located at a side of the pixel circuit layer 220 remote from the substrate 210, the pixel defining layer 230 including a plurality of openings;
light emitting device layer 240. Light emitting device layer 240 includes at least two different color light emitting devices, light emitting layer 242 of the light emitting devices being located in the opening.
The substrate 210 may be a flexible substrate 210 or a hard substrate 210, which is not particularly limited herein. The pixel circuit of the pixel circuit layer 220 is the pixel circuit of any of the above embodiments of the present invention. The opening of the pixel defining layer 230 serves to define the light emitting device.
The light emitting device layer 240 may include a first electrode layer 241, a light emitting layer 242, and a second electrode layer 243 of the sub-pixel circuit layer 220 disposed in a direction away from the substrate 210, wherein the first electrode layer 241 may include a plurality of first electrodes, the first electrode layer 241 may be an anode layer, and the second electrode layer 243 may be a cathode layer.
Optionally, the pixel circuit layer includes an active layer, a first metal layer, a second metal layer, and a third metal layer stacked on one side of the substrate;
Referring to fig. 8, the first metal layer includes a light emission control signal line EML electrically connected with a control terminal of the light emission control module; the second metal layer comprises an initialization signal line VRL, and the initialization signal line VRL is electrically connected with the initialization input end; the third metal layer comprises a power supply line VDDL;
the light emission control signal line EML and the initialization signal line VRL extend in a first direction x1, the power supply line VDDL extends in a second direction y1, and the first direction x1 intersects the second direction y 1; the first electrode node N1 (in this embodiment and the embodiments described below, the first electrode node N1 may be a portion of the active layer connecting the second light emission control transistor T5 and the first electrode of the light emitting device) is located between the light emission control signal line EML and the initialization signal line VRL adjacent to the side of the driving module 101 in the pixel circuit connected thereto, which is far from the light emission control signal line EML.
In combination with fig. 8 and 9, the corresponding opening sizes of the light emitting devices of at least two different light emitting colors may alternatively be different. In fig. 9, light emitting devices including three light emitting colors, that is, a first color light emitting device 244, a second color light emitting device 245, and a third color light emitting device 246 are schematically illustrated in the display panel, and the case where the opening sizes of the pixel defining layers 230 corresponding to the light emitting devices of the three light emitting colors are all different is schematically illustrated.
Fig. 10 is a partially enlarged view of fig. 8, wherein fig. 10 may correspond to an enlarged view of an area outlined by a dotted line frame 01 in fig. 8. With continued reference to fig. 8 and 10, the second metal layer may further include a first metal portion 221, where the first metal portion 221 is located between the light emission control signal line EML and an initialization signal line VRL adjacent to a side of the driving module (including the driving transistor DT) in the pixel circuit connected thereto, which is far away from the light emission control signal line EML, and one end of the first metal portion 221 near the first electrode node is electrically connected to the first electrode node; the active layer includes a first active portion 211, and a side of the first active portion 211, which is close to the power line VDDL, is electrically connected to the power line VDDL; the first metal part 221 overlaps the first active part 211 to form a first compensation capacitor C1.
Specifically, the first metal portion 221 serves as a first plate of the first compensation capacitor C1, and the first active portion 211 serves as a second plate of the first compensation capacitor C1. By disposing the first metal portion 221 on the second metal layer and forming the first compensation capacitor C1 by disposing the active layer including the first active portion 211, the total capacitance at the first electrode node can be increased without adding a film structure in the display panel, thereby reducing the black voltage. In addition, in the conventional display panel, since the active layer and the third metal layer are connected by the via hole, the connection between the first active portion 211 and the power line VDDL can be achieved by opening the via hole between the two, so that no mask is required to be added, and the process steps are saved.
With continued reference to fig. 10, optionally, the first metal portion 211 further overlaps the power line VDDL to form a third compensation capacitor C3, thereby further increasing the total capacitance at the first pole node.
With continued reference to fig. 8 and 10, the third metal layer optionally further includes a second metal portion 222, the first metal portion 221 being electrically connected to the first pole node through the second metal portion 222.
Specifically, in the existing display panel, the second metal layer is connected with the third metal layer through holes, and the third metal layer is connected with the active layer through holes, so that the first metal part 221 is electrically connected with the first electrode node through the second metal part 222, that is, the first metal part 221 is connected with the second metal part 222 through the through holes, the second metal part 222 is electrically connected with the first electrode node through the through holes, and further connection between the first metal part 221 and the first electrode node is realized, and a mask is not required to be added when the display panel is manufactured, so that the process steps are saved.
With continued reference to fig. 8 and 10, the pixel circuit layer 220 may optionally further include a fourth metal layer on a side of the third metal layer remote from the substrate 210; the fourth metal layer includes a third metal part 223, the third metal part 223 is located at a side of the emission control signal line EML away from the driving module (including the driving transistor DT) in the pixel circuit to which it is connected, and at least part of the third metal part 223 overlaps the initialization signal line VRL to form a second compensation capacitor C2.
Specifically, the portion of the third metal portion 223 overlapping the initialization signal line VRL serves as a first plate of the second compensation capacitor C2, and the portion of the initialization signal line VRL overlapping the third metal portion 223 serves as a second plate of the second compensation capacitor C2. By providing the third metal portion 223 on the fourth metal layer, the third metal portion 223 at least partially overlaps the initialization signal line VRL to form the second compensation capacitor C2, so that the total capacitance at the first electrode node can be increased without adding a film structure in the display panel, thereby reducing the black state voltage. In addition, in the conventional display panel, since the active layer and the third metal layer are connected by the via hole, the connection between the third metal portion 223 and the first electrode node can be realized by opening the via hole between the two, so that the mask is not required to be added, and the process steps are saved.
Optionally, the fourth metal layer may further include a fourth metal portion 224 for connecting the first electrode of the light emitting device with the second metal portion 222.
With continued reference to fig. 8 and 10, the third metal part 223 may optionally include a first sub-metal part 2231 extending in the first direction x1 and a second sub-metal part 2232 extending in the second direction y1, the first sub-metal part 2231 overlapping the initialization signal line VRL to form a second compensation capacitor C2, the second sub-metal part 2232 connecting the first sub-metal part 2231 and the first pole node.
Providing the third metal part 223 to include the first sub-metal part 2231 extending in the first direction x1 may allow the first sub-metal part 2231 and the initialization signal line VRL to have a sufficiently large overlapping area, thereby easily forming the larger second compensation capacitance C2. In the present embodiment, the second sub-metal portion 2232 is connected to the first pole node by the connection with the fourth metal portion 224.
It should be noted that, in fig. 8, a case where the pixel circuit of the display panel includes both the first compensation capacitor C1 and the second compensation capacitor C2 is schematically illustrated, and in other alternative embodiments of the present invention, the pixel circuit of the display panel may include only one of the first compensation capacitor C1 and the second compensation capacitor C2.
Optionally, the pixel circuits to which the light emitting devices of different light emission colors are connected are different; the total capacitance values of the compensation capacitors included in the capacitance compensation modules in the pixel circuits connected with the light emitting devices with different light emitting colors are equal.
Referring to fig. 8 and 9, a structure on the left side of the first dotted line L1 may be a pixel circuit to which the first color light emitting device 244 is connected, a structure between the first dotted line L1 and the second dotted line L2 may be a pixel circuit to which the second color light emitting device 245 is connected, and a structure on the right side of the second dotted line L2 may be a pixel circuit to which the third color light emitting device 246 is connected. In the pixel circuit to which the light emitting devices of different light emitting colors are connected, the total capacitance values of the compensation capacitances included in the capacitance compensation module are equal, fig. 8 schematically shows a case where the capacitance compensation module includes the first compensation capacitance C1 and the second compensation capacitance C2, and in the pixel circuit to which the light emitting devices of different light emitting colors are connected, the capacitance sum of the first compensation capacitance C1 and the second compensation capacitance C2 included in the capacitance compensation module is equal. In this embodiment, the total capacitance values of the compensation capacitors included in the capacitance compensation modules in the pixel circuits connected with the light emitting devices with different light emitting colors are equal, so that the total capacitance at the first electrode node of the light emitting devices with different light emitting colors is increased, which is beneficial to reducing the black state voltage of the pixel circuits driving the light emitting devices with different light emitting colors, and further is beneficial to reducing the power consumption of the whole display panel.
Optionally, in the pixel circuit connected with the light emitting devices with different light emitting colors, the number of the compensating capacitors included in the capacitance compensating module is the same; in addition, in the pixel circuits connected with the light emitting devices with different light emitting colors, the capacitance values of the same compensation capacitors included in the capacitance compensation modules are equal, so that the structures of the capacitance compensation modules are completely the same in the pixel circuits connected with the light emitting devices with different light emitting colors, and further, the pixel circuits with different topological structures are not required to be prepared for the light emitting devices with different colors, and the preparation process of the display panel is simplified.
When the existing display panel comprises at least two light emitting devices with different light emitting colors, the total capacitance at the first electrode node of the pixel circuit for driving the different light emitting devices is unequal, so that the data voltage for driving the light emitting devices with different light emitting colors is larger in difference under the same display gray scale, and the display effect is affected.
Fig. 11 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and referring to fig. 11, optionally, total capacitance values of compensation capacitors included in a capacitance compensation module in a pixel circuit connected to light emitting devices of at least two different light emitting colors are not equal.
Specifically, the capacitance compensation module is arranged in the pixel circuit, so that the total capacitance at the first electrode node can be increased, the effect of reducing the black state voltage corresponding to the pixel circuit can be achieved, and the power consumption of the display panel can be reduced. Therefore, when the total capacitance values of the compensation capacitances included in the capacitance compensation modules are not equal in the pixel circuits connected with the light emitting devices with different light emitting colors, the power consumption of the display panel can be reduced.
Optionally, the larger the opening corresponding to the light emitting device, the smaller the total capacitance value of each compensation capacitor of the capacitance compensation module in the pixel circuit connected to the light emitting device.
Referring to fig. 9 and 11, the display panel includes a first color light emitting device 244, a second color light emitting device 245, and a third color light emitting device 246, wherein the corresponding opening of the first color light emitting device 244 is smaller than the corresponding opening of the second color light emitting device 245, and the corresponding opening of the second color light emitting device 245 is smaller than the corresponding opening of the third color light emitting device 246; the capacitance compensation module in the pixel circuit to which the first color light emitting device 244 is connected includes a first compensation capacitance C1 and a second compensation capacitance C2; the capacitance compensation modules in the pixel circuit connected to the second color light emitting device 245 and the pixel circuit connected to the third color light emitting device 246 each include one of the first compensation capacitor C1 and the second compensation capacitor C2, and the capacitance value of the compensation capacitor included in the pixel circuit connected to the second color light emitting device 245 is larger than the capacitance value of the compensation capacitor included in the pixel circuit connected to the third color light emitting device 246.
The structure on the left side of the first dotted line L1 may be a pixel circuit connected to the first color light emitting device 244, the structure between the first dotted line L1 and the second dotted line L2 may be a pixel circuit connected to the second color light emitting device 245, and the structure on the right side of the second dotted line L2 may be a pixel circuit connected to the third color light emitting device 246. In the pixel circuit connected to the light emitting devices of different light emitting colors, the total capacitance values of the compensation capacitors included in the capacitance compensation module are not equal, specifically, the total capacitance value of the compensation capacitors included in the capacitance compensation module in the pixel circuit connected to the first color light emitting device 244 is larger than the total capacitance value of the compensation capacitors included in the capacitance compensation module in the pixel circuit connected to the second color light emitting device 245, the total capacitance value of the compensation capacitors included in the capacitance compensation module in the pixel circuit connected to the second color light emitting device 245 is larger than the total capacitance value of the compensation capacitors included in the capacitance compensation module in the pixel circuit connected to the third color light emitting device 246, fig. 11 schematically shows that the capacitance compensation module in the pixel circuit connected to the first color light emitting device 244 includes a first compensation capacitor C1 and a second compensation capacitor C2, the capacitance compensation module in the pixel circuit connected to the second color light emitting device 245 includes a second compensation capacitor C2, the capacitance compensation module in the pixel circuit connected to the third color light emitting device 245 includes a first compensation capacitor C1, and the capacitance module in the pixel circuit connected to the second color light emitting device 246 includes a second compensation capacitor C2. In this embodiment, the larger the opening corresponding to the light emitting device (the larger the capacitance of the light emitting device itself), the smaller the total capacitance value of each compensation capacitor of the capacitance compensation module in the pixel circuit connected with the light emitting device, so as to reduce the total capacitance difference at the first electrode node in the pixel circuit connected with the light emitting devices of different colors, further reduce the data voltage difference of driving the light emitting devices of different light emitting colors under the same display gray level, further reduce the voltage jump during display, and improve the display effect.
It should be noted that, in the technical solution corresponding to the display panel structure shown in fig. 11 is only an alternative exemplary solution that the larger the opening corresponding to the light emitting device is, the smaller the total capacitance value of each compensation capacitor of the capacitance compensation module in the pixel circuit connected to the light emitting device is, in other alternative embodiments of the present invention, the number of compensation capacitors included in the capacitance compensation module in the pixel circuit connected to the light emitting device with different colors may be flexibly set, and the larger the opening corresponding to the light emitting device is realized by adjusting the size of the compensation capacitors, so that the smaller the total capacitance value of each compensation capacitor of the capacitance compensation module in the pixel circuit connected to the light emitting device is, thereby reducing the data voltage difference of driving the light emitting devices with different light emitting colors under the same display gray scale.
In another alternative embodiment of the present invention, the pixel circuits and the light emitting devices are arranged in an array, the light emitting devices of at least two light emitting colors are located in the same column, and the display panel further includes a plurality of data lines extending along the second direction, wherein the larger the opening corresponding to the light emitting device is, the smaller the total capacitance value of the compensation capacitor included in the capacitance compensation module in the pixel circuit connected to the light emitting device is in the light emitting devices of different light emitting colors driven by the pixel circuit connected to the same data line.
Specifically, the data voltages of the pixel circuits connected to the same data line are all transmitted by the same data line, so that the larger the corresponding opening of the light emitting device (the larger the capacitance of the light emitting device) is, the smaller the total capacitance value of the compensation capacitor included in the capacitance compensation module in the pixel circuit connected to the light emitting device is, the voltage jump on the data line can be reduced, and the display effect is further improved.
With continued reference to fig. 8 and 11, the display panel further includes a first scan line S1, a second scan line S2, and a Data line Data, wherein the first scan line S1 is connected to the first scan signal input terminal of the pixel circuit, the second scan line S2 is connected to the second scan signal input terminal of the pixel circuit, and the Data line Data is connected to the Data voltage input terminal of the pixel circuit.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. 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, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (14)
1. A display panel, which is characterized in that,
the display panel comprises
A substrate;
a pixel circuit layer located at one side of the substrate, the pixel circuit layer including a plurality of pixel circuits;
a pixel defining layer located on a side of the pixel circuit layer remote from the substrate, the pixel defining layer including a plurality of openings;
a light emitting device layer comprising at least two light emitting devices of different colors, the light emitting layers of the light emitting devices being located in the openings;
the pixel circuit layer comprises an active layer, a first metal layer, a second metal layer and a third metal layer which are stacked on one side of the substrate;
the first metal layer comprises a light-emitting control signal wire, and the light-emitting control signal wire is electrically connected with the control end of the light-emitting control module; the second metal layer comprises an initialization signal wire, and the initialization signal wire is electrically connected with an initialization input end; the third metal layer comprises a power line;
the light emission control signal line and the initialization signal line extend in a first direction, the power line extends in a second direction, and the first direction intersects the second direction; the first electrode node is positioned between the light-emitting control signal line and the initialization signal line which is adjacent to one side of the drive module in the pixel circuit connected with the light-emitting control signal line and is far away from the drive module;
The corresponding opening sizes of the light emitting devices of at least two different light emitting colors are different;
the second metal layer further comprises a first metal part, wherein the first metal part is arranged between the initialization signal wire which is connected with the light-emitting control signal wire and is adjacent to one side, far away from a driving module, of a pixel circuit connected with the light-emitting control signal wire, and one end, close to the first electrode node, of the first metal part is electrically connected with the first electrode node;
the active layer comprises a first active part, and one side of the first active part, which is close to the power line, is electrically connected with the power line; the first metal part and the first active part are overlapped to form a first compensation capacitor;
the third metal layer further comprises a second metal part, and the first metal part is electrically connected with the first electrode node through the second metal part;
the pixel circuit layer further comprises a fourth metal layer, wherein the fourth metal layer is far away from one side of the substrate; the fourth metal layer comprises a third metal part which is positioned at one side of the light-emitting control signal line far away from the driving module in the pixel circuit connected with the third metal part, and at least part of the third metal part is overlapped with the initialization signal line to form a second compensation capacitor;
The third metal part comprises a first sub-metal part extending along the first direction and a second sub-metal part extending along the second direction, the first sub-metal part and the initialization signal line are overlapped to form a second compensation capacitor, and the second sub-metal part is connected with the first sub-metal part and the first electrode node.
2. The display panel according to claim 1, wherein the pixel circuit comprises: the driving module, the capacitance compensation module, the first power supply voltage input end, the second power supply voltage input end and the driving current output end are connected with at least one light emitting device;
the driving module is connected with a first pole of the light emitting device through a driving current output end of the pixel circuit, and the driving module and the light emitting device are connected between the first power supply voltage input end and the second power supply voltage input end;
the capacitance compensation module comprises at least one compensation capacitor, a first polar plate of the compensation capacitor is electrically connected with a first pole of the light-emitting device, and a second polar plate of the compensation capacitor is connected with a fixed voltage;
in the planar topology structure of the pixel circuit, the compensation capacitor is located at one side of the first electrode node far away from the driving module and/or one side of the first electrode node close to a power line, and the power line is connected with the first power supply voltage input end; wherein the first pole node comprises at least part of a connection line between the drive current output and the first pole of the light emitting device.
3. The display panel of claim 2, wherein the capacitance compensation module comprises a first compensation capacitance, a first plate of the first compensation capacitance is electrically connected to a first electrode of the light emitting device, and a second plate of the first compensation capacitance is electrically connected to the first power supply voltage input terminal.
4. A display panel according to claim 3, characterized in that in the planar topology of the pixel circuit the first compensation capacitance is located at a side of the first pole node close to the power supply line.
5. The display panel according to claim 2, wherein the pixel circuit further comprises an initialization module and an initialization voltage input terminal, the initialization voltage input terminal being connected to an initialization signal line, the initialization module being configured to write an initialization voltage to the control terminal of the driving module and/or the first electrode of the light emitting device during an initialization phase;
the capacitance compensation module further comprises a second compensation capacitor, wherein a first polar plate of the second compensation capacitor is electrically connected with the first polar plate of the light-emitting device, and a second polar plate of the second compensation capacitor is electrically connected with the initialization voltage input end.
6. The display panel of claim 5, wherein in a planar topology of the pixel circuit, the second compensation capacitor is located on a side of the first pole node remote from the drive module.
7. The display panel according to any one of claims 2-6, wherein the pixel circuit further comprises a data writing module for writing data voltages to the control terminal of the driving module during a data writing phase.
8. The display panel according to claim 7, wherein the pixel circuit further comprises a light emission control module for controlling a conduction state between a first power supply voltage input terminal and a first terminal of the driving module and/or a second terminal of the driving module and a first pole of the light emitting device.
9. The display panel of claim 8, wherein the light emission control module comprises a first light emission control transistor and a second light emission control transistor, the first light emission control transistor being connected between the first power supply voltage input terminal and the first terminal of the driving module, the first pole of the second light emission control transistor being electrically connected to the second terminal of the driving module, the second pole of the second light emission control transistor being electrically connected to the first pole of the light emitting device, the second pole of the second light emission control transistor being the driving current output terminal.
10. The display panel according to claim 7, wherein the driving module includes a driving transistor, and the pixel circuit further includes a threshold voltage compensation module for writing information including a threshold voltage of the driving transistor to a gate of the driving transistor in a data writing stage.
11. The display panel of claim 7, wherein the pixel circuit further comprises a memory module for storing a control terminal voltage of the driving module.
12. The display panel according to claim 2, wherein the pixel circuits to which the light emitting devices of different light emission colors are connected are different;
the total capacitance value of each compensation capacitor included in the capacitance compensation module in the pixel circuit connected with the light emitting devices with different light emitting colors is equal;
or the total capacitance value of each compensation capacitor included in the capacitance compensation module in the pixel circuit connected with the light emitting devices with at least two different light emitting colors is not equal.
13. The display panel according to claim 12, wherein the total capacitance value of the compensation capacitances included in the capacitance compensation module in the pixel circuit to which the light emitting devices of the at least two different light emission colors are connected is not equal; the larger the opening corresponding to the light emitting device is, the smaller the total capacitance value of each compensation capacitor of the capacitance compensation module in the pixel circuit connected with the light emitting device is; or the pixel circuits and the light emitting devices are arranged in an array, the light emitting devices with at least two light emitting colors are located in the same column, the display panel further comprises a plurality of data lines extending along a second direction, wherein the larger the opening corresponding to the light emitting device is, the smaller the total capacitance value of the compensation capacitor included in the capacitance compensation module in the pixel circuit connected with the light emitting device is in the light emitting devices with different light emitting colors driven by the pixel circuits connected with the same data line.
14. The display panel of claim 2, wherein the display panel comprises a first color light emitting device, a second color light emitting device, and a third color light emitting device, wherein a corresponding opening of the first color light emitting device is smaller than a corresponding opening of the second color light emitting device, and wherein a corresponding opening of the second color light emitting device is smaller than a corresponding opening of the third color light emitting device;
the capacitance compensation module in the pixel circuit connected with the first color light emitting device comprises a first compensation capacitance and a second compensation capacitance; the capacitance compensation modules in the pixel circuit connected with the second color light emitting device and the pixel circuit connected with the third color light emitting device respectively comprise one of a first compensation capacitor and a second compensation capacitor, and the capacitance value of the compensation capacitor included in the pixel circuit connected with the second color light emitting device is larger than that of the compensation capacitor included in the pixel circuit connected with the third color light emitting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111340310.4A CN114023237B (en) | 2021-11-12 | 2021-11-12 | Pixel circuit and display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111340310.4A CN114023237B (en) | 2021-11-12 | 2021-11-12 | Pixel circuit and display panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114023237A CN114023237A (en) | 2022-02-08 |
| CN114023237B true CN114023237B (en) | 2024-01-16 |
Family
ID=80063860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111340310.4A Active CN114023237B (en) | 2021-11-12 | 2021-11-12 | Pixel circuit and display panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114023237B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114464134B (en) * | 2022-03-30 | 2023-09-05 | 京东方科技集团股份有限公司 | Pixel circuit and display device |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009037100A (en) * | 2007-08-03 | 2009-02-19 | Sony Corp | Display device |
| JP2009109519A (en) * | 2007-10-26 | 2009-05-21 | Sony Corp | Display device and electronic apparatus |
| CN101577085A (en) * | 2008-05-08 | 2009-11-11 | 索尼株式会社 | Display apparatus, display-apparatus driving method and electronic instrument |
| CN111508996A (en) * | 2018-12-07 | 2020-08-07 | 三星显示有限公司 | Organic light emitting diode display |
| CN111508422A (en) * | 2020-04-27 | 2020-08-07 | 昆山国显光电有限公司 | Pixel circuit, driving method thereof and display panel |
| CN111599311A (en) * | 2020-05-28 | 2020-08-28 | 维沃移动通信有限公司 | Pixel circuit, display unit and terminal equipment |
| CN111627341A (en) * | 2020-06-30 | 2020-09-04 | 武汉天马微电子有限公司 | Display panel and display device |
| CN112037716A (en) * | 2020-09-21 | 2020-12-04 | 京东方科技集团股份有限公司 | Pixel circuit, display panel and display device |
| CN112562593A (en) * | 2021-01-05 | 2021-03-26 | 湖北长江新型显示产业创新中心有限公司 | Display panel and display device |
| CN112802873A (en) * | 2019-10-28 | 2021-05-14 | 乐金显示有限公司 | Light emitting display panel |
| CN113178163A (en) * | 2021-04-27 | 2021-07-27 | 武汉天马微电子有限公司 | Display panel and display device |
| CN113196498A (en) * | 2019-11-29 | 2021-07-30 | 京东方科技集团股份有限公司 | Display substrate and display device |
| CN113436578A (en) * | 2021-06-30 | 2021-09-24 | 合肥维信诺科技有限公司 | Display panel and display device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107342043B (en) * | 2017-08-15 | 2019-10-01 | 上海天马微电子有限公司 | Pixel-driving circuit and its control method, display panel and display device |
| US10984724B2 (en) * | 2019-05-14 | 2021-04-20 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Pixel compensation circuit and OLED display device |
-
2021
- 2021-11-12 CN CN202111340310.4A patent/CN114023237B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009037100A (en) * | 2007-08-03 | 2009-02-19 | Sony Corp | Display device |
| JP2009109519A (en) * | 2007-10-26 | 2009-05-21 | Sony Corp | Display device and electronic apparatus |
| CN101577085A (en) * | 2008-05-08 | 2009-11-11 | 索尼株式会社 | Display apparatus, display-apparatus driving method and electronic instrument |
| CN111508996A (en) * | 2018-12-07 | 2020-08-07 | 三星显示有限公司 | Organic light emitting diode display |
| CN112802873A (en) * | 2019-10-28 | 2021-05-14 | 乐金显示有限公司 | Light emitting display panel |
| CN113196498A (en) * | 2019-11-29 | 2021-07-30 | 京东方科技集团股份有限公司 | Display substrate and display device |
| CN111508422A (en) * | 2020-04-27 | 2020-08-07 | 昆山国显光电有限公司 | Pixel circuit, driving method thereof and display panel |
| CN111599311A (en) * | 2020-05-28 | 2020-08-28 | 维沃移动通信有限公司 | Pixel circuit, display unit and terminal equipment |
| CN111627341A (en) * | 2020-06-30 | 2020-09-04 | 武汉天马微电子有限公司 | Display panel and display device |
| CN112037716A (en) * | 2020-09-21 | 2020-12-04 | 京东方科技集团股份有限公司 | Pixel circuit, display panel and display device |
| CN112562593A (en) * | 2021-01-05 | 2021-03-26 | 湖北长江新型显示产业创新中心有限公司 | Display panel and display device |
| CN113178163A (en) * | 2021-04-27 | 2021-07-27 | 武汉天马微电子有限公司 | Display panel and display device |
| CN113436578A (en) * | 2021-06-30 | 2021-09-24 | 合肥维信诺科技有限公司 | Display panel and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114023237A (en) | 2022-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11183112B2 (en) | Display device | |
| CN107274825B (en) | Display panel, display device, pixel driving circuit and control method thereof | |
| US11374084B2 (en) | Organic light emitting display panel and display device | |
| CN112289267A (en) | Pixel circuit and display panel | |
| CN110136642B (en) | Pixel circuit, driving method thereof and display panel | |
| CN107481668B (en) | Display panel and display device | |
| KR20230110685A (en) | Display device | |
| US20090243977A1 (en) | Pixel and organic light emitting display device including the same | |
| KR100649253B1 (en) | Light emitting display, and display panel and driving method thereof | |
| CN110322842B (en) | Pixel driving circuit and display device | |
| CN110428778B (en) | Pixel circuit, driving method thereof and display panel | |
| WO2021217993A1 (en) | Display substrate and display device | |
| CN112885850A (en) | Display panel and display device | |
| CN216818344U (en) | Display panel and display device | |
| CN210837108U (en) | Display panel and display device | |
| CN114023237B (en) | Pixel circuit and display panel | |
| CN106847190B (en) | Pixel charging circuit, driving method thereof and organic light emitting display device | |
| CN110930949A (en) | Pixel circuit and display panel | |
| CN111508431A (en) | Pixel driving circuit, method and display device | |
| CN114743471A (en) | OLED display panel and display device | |
| CN113920935A (en) | Pixel driving circuit, display panel, display device and pixel driving method | |
| CN115023756B (en) | Pixel driving circuit, driving method thereof and display panel | |
| CN111883060B (en) | Display panel and display device | |
| CN114783372B (en) | Pixel driving circuit, display panel and display device | |
| CN113643662B (en) | Pixel circuit, driving method thereof and display substrate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |