CN110223633B - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN110223633B
CN110223633B CN201910487136.2A CN201910487136A CN110223633B CN 110223633 B CN110223633 B CN 110223633B CN 201910487136 A CN201910487136 A CN 201910487136A CN 110223633 B CN110223633 B CN 110223633B
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Prior art keywords
reference line
emitting diode
electrode
pixel
light
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CN110223633A (en
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李玥
张蒙蒙
杨帅
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Wuhan Tianma Microelectronics Co Ltd
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Shanghai Tianma AM OLED Co Ltd
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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
    • 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)
  • Electroluminescent Light Sources (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention provides a display panel and a display device. The display panel comprises a first pixel and a first reference line which are connected, and a second pixel and a second reference line which are connected; the first pixel comprises a first light emitting diode and a pixel driving circuit, the second pixel comprises a second light emitting diode and a pixel driving circuit, and the pixel driving circuit comprises a driving transistor and a compensating transistor; in the pixel driving circuit, the compensation transistor is used for detecting the threshold voltage of the driving transistor; in the first pixel, the pixel driving circuit is used for controlling the potential of the first reference line to be transmitted to the first A electrode of the first light-emitting diode; in the second pixel, the pixel driving circuit is used for controlling the potential of the second reference line to be transmitted to the second electrode of the second light-emitting diode; the lighting voltage of the first light emitting diode is smaller than that of the second light emitting diode, and the potential of the first reference line is smaller than that of the second reference line. In the present invention, the brightness of the display panel is uniform.

Description

Display panel and display device
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a display panel and a display device.
[ background of the invention ]
In the related art, organic light emitting display panels are widely used for smart phones or similar devices; however, the red, green, and blue organic light emitting diodes in the organic light emitting display panel are different, and the signal lines in the organic light emitting display panel are not reasonable, so that the luminance of the organic light emitting display panel is not uniform.
[ summary of the invention ]
In order to solve the above technical problems, the present invention provides a display panel and a display device.
In a first aspect, a display panel includes a first pixel and a first reference line connected, a second pixel and a second reference line connected;
the first pixel comprises a first light emitting diode and a pixel driving circuit, the second pixel comprises a second light emitting diode and the pixel driving circuit, and the pixel driving circuit comprises a driving transistor and a compensating transistor;
in the pixel driving circuit, the compensation transistor is used for detecting the threshold voltage of the driving transistor;
in the first pixel, the pixel driving circuit is used for controlling the potential of the first reference line to be transmitted to a first electrode of the first light-emitting diode;
in the second pixel, the pixel driving circuit is used for controlling the potential of the second reference line to be transmitted to the second electrode of the second light-emitting diode;
the lighting voltage of the first light emitting diode is smaller than that of the second light emitting diode, and the potential of the first reference line is smaller than that of the second reference line.
Optionally, the first pixels comprise red pixels and/or green pixels and the second pixels comprise blue pixels.
Optionally, the potential of the first reference line and the potential of the second reference line are both greater than-4 volts and less than-3 volts.
Optionally, a difference between the potential of the first reference line and the potential of the second reference line is greater than 0.1 volt and less than 0.3 volt.
Optionally, the resistivity of the first reference line is less than the resistivity of the second reference line.
Optionally, the cross-sectional area of the first reference line is greater than the cross-sectional area of the second reference line.
Optionally, the display panel further includes a first conductive layer, a second conductive layer, and a third conductive layer, wherein the second conductive layer is located between the first conductive layer and the third conductive layer;
the display panel further comprises a gate line and a data line, wherein the gate line is located on the first conductive layer, and the data line is located on the third conductive layer;
the first reference line is located on the second conductive layer, and the second reference line is not located on the second conductive layer.
Optionally, the display panel further includes a fourth conductive layer, where the fourth conductive layer is located on a side of the third conductive layer away from the first conductive layer;
the first electrode of the first light-emitting diode and the second electrode of the second light-emitting diode are both positioned on the fourth conducting layer;
the second reference line is located on the fourth conductive layer.
Optionally, the display panel further comprises a fifth conductive layer, the fifth conductive layer being located between the second conductive layer and the third conductive layer;
the second reference line is located on the fifth conductive layer.
Optionally, an extending direction of the first reference line is the same as an extending direction of the gate line, and an extending direction of the second reference line is the same as an extending direction of the gate line.
Alternatively, the plurality of first reference lines are arranged in an extending direction of the gate line, and the plurality of second reference lines are arranged in the extending direction of the gate line.
Optionally, an extending direction of the first reference line is the same as an extending direction of the gate line, and an extending direction of the second reference line is the same as an extending direction of the data line.
Optionally, the pixel driving circuit further includes a first initialization transistor, a second initialization transistor, a data writing transistor, a first light emission control transistor, a second light emission control transistor, and a storage capacitor;
the first electrode of the first initialization transistor is electrically connected with the control electrode of the driving transistor;
the first electrode of the second initialization transistor is electrically connected with the first electrode of the first light-emitting diode or the second first electrode of the second light-emitting diode;
the first electrode of the data writing transistor is electrically connected with the first electrode of the driving transistor;
the first electrode of the first light-emitting control transistor is electrically connected with the first electrode of the driving transistor;
a first electrode of the second light-emitting control transistor is electrically connected with a second electrode of the driving transistor, and a second electrode of the second light-emitting control transistor is electrically connected with a first electrode of the first light-emitting diode or a second electrode of the second light-emitting diode;
the first electrode of the storage capacitor is electrically connected to the control electrode of the driving transistor.
In a second aspect, a display device includes the display panel.
In the invention, the first pixel comprises a first light emitting diode and a pixel driving circuit, and the pixel driving circuit drives the first light emitting diode to emit light; the second pixel comprises a second light emitting diode and a pixel driving circuit, and the pixel driving circuit drives the second light emitting diode to emit light; the pixel driving circuit supplies a driving current to the first light emitting diode equal to a driving current to the second light emitting diode. The starting voltage of the first light-emitting diode is smaller than that of the second light-emitting diode, and the brightness-voltage characteristic of the first light-emitting diode is different from that of the second light-emitting diode; the brightness of the first light-emitting diode is equal to that of the second light-emitting diode, and the voltage across the first light-emitting diode is smaller than that across the second light-emitting diode. In the first pixel, the pixel driving circuit is used for controlling the potential of the first reference line to be transmitted to the first A electrode of the first light-emitting diode; in the second pixel, the pixel driving circuit is used for controlling the potential of the second reference line to be transmitted to the second electrode of the second light-emitting diode; the potential of the first reference line is less than the potential of the second reference line. The electric potential of the first electrode of the first light-emitting diode is smaller than the electric potential of the second electrode of the second light-emitting diode, the electric potential of the first second electrode of the first light-emitting diode is equal to the electric potential of the second electrode of the second light-emitting diode, and the voltage across the first light-emitting diode is smaller than the voltage across the second light-emitting diode, so that the brightness of the first light-emitting diode is equal to that of the second light-emitting diode, and the brightness of the display panel is uniform. In addition, the first reference line is only connected with the first pixel but not connected with the second pixel, the second reference line is only connected with the second pixel but not connected with the first pixel, the load connected with the first reference line is reduced, the load connected with the second reference line is reduced, the voltage drop of the first reference line is reduced, the voltage drop of the second reference line is reduced, the potential of the first reference line is relatively uniform, and the potential of the second reference line is relatively uniform.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art display panel;
FIG. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 3A is a circuit diagram of a first pixel in a display panel according to an embodiment of the invention;
FIG. 3B is a circuit diagram of a second pixel in the display panel according to the embodiment of the invention;
FIG. 4 is a graph of the luminance vs. voltage characteristics of LEDs in a display panel according to an embodiment of the present invention;
FIG. 5 is a schematic view of another structure of a display panel according to an embodiment of the present invention;
FIG. 6 is a schematic view of another structure of a display panel according to an embodiment of the present invention;
FIG. 7 is a schematic view of another structure of a display panel according to an embodiment of the present invention;
FIG. 8 is a schematic view of another structure of a display panel according to an embodiment of the present invention;
FIG. 9 is a schematic view of another structure of a display panel according to an embodiment of the present invention;
FIG. 10 is a schematic view of another structure of a display panel according to an embodiment of the present invention;
FIG. 11 is a schematic view of another structure of a display panel according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a display device according to an embodiment of the invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used herein to describe devices in accordance with embodiments of the present invention, these devices should not be limited by these terms. These terms are only used to distinguish one device from another. For example, a first device may also be referred to as a second device, and similarly, a second device may also be referred to as a first device, without departing from the scope of embodiments of the present invention.
Fig. 1 is a schematic structural diagram of a display panel in the prior art.
As shown in fig. 1, in the prior art, a display panel 100 includes a first pixel 110, a second pixel 120, and a reference line 130, the reference line 130 is electrically connected to the first pixel 110 and the second pixel 120, a lighting voltage of the first pixel 110 is less than a lighting voltage of the second pixel 120, a difference between the lighting voltage of the first pixel 110 and the lighting voltage of the second pixel 120 is greater than 0.1 v, a same potential of the reference line 130 is transmitted to the first pixel 110 and the second pixel 120, a luminance of the first pixel 110 is greater than a luminance of the second pixel 120, and a luminance of the display panel 100 is not uniform.
In order to solve the above technical problems, embodiments of the present invention provide a display panel and a display device.
FIG. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention; FIG. 3A is a circuit diagram of a first pixel in a display panel according to an embodiment of the invention; FIG. 3B is a circuit diagram of a second pixel in the display panel according to the embodiment of the invention.
As shown in fig. 2, 3A, and 3B, the display panel 200 includes a first pixel PX1 and a first reference line RL1 connected, a second pixel PX2 and a second reference line RL2 connected; the first pixel PX1 includes a first light emitting diode D1, a pixel driving circuit PD, the second pixel PX2 includes a second light emitting diode D2, a pixel driving circuit PD, the pixel driving circuit PD includes a driving transistor T3, a compensating transistor T4; in the pixel driving circuit PD, the compensation transistor T4 is used for detecting the threshold voltage of the driving transistor T3; in the first pixel PX1, the pixel driving circuit PD is configured to control the potential of the first reference line RL1 to be transmitted to the first a electrode D11 of the first light emitting diode D1; in the second pixel PX2, the pixel driving circuit PD is configured to control the potential of the second reference line RL2 to be transmitted to the second gate electrode D21 of the second light emitting diode D2; the lighting voltage of the first light emitting diode D1 is lower than that of the second light emitting diode D2, and the potential of the first reference line RL1 is lower than that of the second reference line RL 2.
As shown in fig. 3A and 3B, the display panel 200 includes a first scan line SL1, a second scan line SL2, an emission line EL, a data line DL, a first power line VL1, a second power line VL2, a first reference line RL1, a second reference line RL2, a first light emitting diode D1, and a second light emitting diode D2. The pixel driving circuit PD includes a driving transistor T3, a compensation transistor T4, a first initialization transistor T5, a second initialization transistor T7, a data writing transistor T2, a first light emission control transistor T1, a second light emission control transistor T6, and a storage capacitor C. A first electrode of the first initialization transistor T5 is electrically connected to the control electrode of the driving transistor T3, a second electrode of the first initialization transistor T5 is electrically connected to the first reference line RL1 or the second reference line RL2, and a control electrode of the first initialization transistor T5 is electrically connected to the first scan line SL 1. A first electrode of the second initializing transistor T7 is electrically connected to the first electrode D11 of the first light emitting diode D1 or the second electrode D21 of the second light emitting diode D2, a second electrode of the second initializing transistor T7 is electrically connected to the first reference line RL1 or the second reference line RL2, and a control electrode of the second initializing transistor T7 is electrically connected to the first scan line SL 1. A first electrode of the data writing transistor T2 is electrically connected to a first electrode of the driving transistor T3, a second electrode of the data writing transistor T2 is electrically connected to the data line DL, and a control electrode of the data writing transistor T2 is electrically connected to the second scan line SL 2. A first electrode of the compensation transistor T4 is electrically connected to the control electrode of the driving transistor T3, a second electrode of the compensation transistor T4 is electrically connected to the second electrode of the driving transistor T3, and a control electrode of the compensation transistor T4 is electrically connected to the second scan line SL 2. A first electrode of the first light emission controlling transistor T1 is electrically connected to a first electrode of the driving transistor T3, a second electrode of the first light emission controlling transistor T1 is electrically connected to the first power supply line VL1, and a control electrode of the first light emission controlling transistor T1 is electrically connected to the emission line EL. A first electrode of the second light emission controlling transistor T6 is electrically connected to the second electrode of the driving transistor T3, a second electrode of the second light emission controlling transistor T6 is electrically connected to the first electrode D11 of the first light emitting diode D1 or the second electrode D21 of the second light emitting diode D2, and a control electrode of the second light emission controlling transistor T6 is electrically connected to the emission line EL. A first electrode of the storage capacitor C is electrically connected to the control electrode of the driving transistor T3, and a second electrode of the storage capacitor C is electrically connected to the first power supply line VL 1. The first second electrode D12 of the first light emitting diode D1 or the second electrode D22 of the second light emitting diode D2 is electrically connected to the second power line VL 2. The control electrode of the transistor is a grid electrode of the transistor, the first electrode of the transistor is a source electrode or a drain electrode of the transistor, the second electrode of the transistor is a source electrode or a drain electrode of the transistor, the first electrode of the light-emitting diode is an anode of the light-emitting diode, and the second electrode of the light-emitting diode is a cathode of the light-emitting diode.
As shown in fig. 3A and 3B, the display panel 200 performs an initialization phase S1, a data writing phase S2, and a light emission control phase S3, respectively. In the initialization stage S1, the first scan line SL1 transmits the turn-on potential to the second scan lineA control electrode of the initialization transistor T5, the first initialization transistor T5 is turned on, and the potential of the first reference line RL1 or the potential of the second reference line RL2 reaches the control electrode of the driving transistor T3 and the first electrode of the storage capacitor C through the first initialization transistor T5; the first scan line SL1 transmits a turn-on potential to the control electrode of the second initialization transistor T7, the second initialization transistor T7 is turned on, and the potential of the first reference line RL1 or the potential of the second reference line RL2 reaches the first electrode D11 of the first light emitting diode D1/the second electrode D21 of the second light emitting diode D2 through the second initialization transistor T7. In the data writing phase S2, the second scan line SL2 transmits a turn-on potential to the control electrode of the data writing transistor T2, the data writing transistor T2 is turned on, the potential of the data line DL reaches the first electrode of the driving transistor T3 through the data writing transistor T2, the absolute value of the difference between the potential of the first reference line RL1 or the potential of the second reference line RL2 and the potential of the data line DL is greater than the threshold voltage of the driving transistor T3, the gate-source voltage of the driving transistor T3 is greater than the threshold voltage of the driving transistor T3, and the driving transistor T3 is turned on; the second scan line SL2 transmits a turn-on potential to the control electrode of the compensation transistor T4, the compensation transistor T4 is turned on, the data line DL charges the control electrode of the driving transistor T3 through the data writing transistor T2, the driving transistor T3, and the compensation transistor T4, the potential of the control electrode of the driving transistor T3 becomes the sum of the potential of the data line DL and the threshold voltage of the driving transistor T3, the driving transistor T3 is turned off, and the potential of the first electrode of the storage capacitor C becomes the sum of the potential of the data line DL and the threshold voltage of the driving transistor T3. In the emission control period S3, the emission line EL transmits a turn-on potential to the control electrode of the first emission control transistor T1, the first emission control transistor T1 is turned on, the potential of the first power supply line VL1 reaches the first electrode of the driving transistor T3 through the first emission control transistor T1, the gate-source voltage of the driving transistor T3 is equal to the potential of the data line DL plus the threshold voltage of the driving transistor T3 minus the potential of the first power supply line VL1, the driving transistor T3 supplies a driving current, I ∈ (VD-VDD)2I is a driving current of the driving transistor T3, VD is a potential of the data line DL, VDD is a potential of the first power line VL1, the driving current and the drivingThe threshold voltage of the transistor T3 is independent; the emission line EL transmits a turn-on potential to the control electrode of the second emission control transistor T6, the second emission control transistor T6 is turned on, the driving current of the driving transistor T3 reaches the first electrode D11 of the first light emitting diode D1/the second electrode D21 of the second light emitting diode D2 through the second emission control transistor T6, the potential of the second power supply line VL2 reaches the first second electrode D12 of the first light emitting diode D1/the second electrode D22 of the second light emitting diode D2, the difference between the potential of the first reference line RL 1/the potential of the second reference line RL2 and the potential of the second power supply line VL2 is larger than the turn-on voltage of the first light emitting diode D1/the turn-on voltage of the second light emitting diode D2, the cross-voltage of the first light emitting diode D1/the cross-voltage of the second light emitting diode D2 is larger than the turn-on voltage of the first light emitting diode D1/the turn-on voltage of the second light emitting diode D2, the first light emitting diode D1/the second light emitting diode D2 emit light. The transistor is a PMOS type transistor, and the conducting potential of the transistor is low potential; the transistor is an NMOS type transistor, and the on potential of the transistor is a high potential.
FIG. 4 is a graph of the luminance versus voltage characteristics of the LEDs in the display panel according to the embodiment of the invention.
As shown in fig. 4, the luminance L of the led is related to the voltage V across the led, and the luminance-voltage characteristics of the first led D1 are different from those of the second led D2. The brightness L of the first led D1 is equal to the brightness L of the second led D2, and the voltage V across the first led D1 is less than the voltage V across the second led D2. The voltage across the first led D1 is equal to the voltage across the second led D2, and the luminance L of the first led D1 is greater than the luminance L of the second led D2. It is defined here that the luminance L of the led is equal to 0.1 NIT (NIT), and the voltage V across the led is equal to the turn-on voltage of the led. The lighting voltage of the first light emitting diode D1 is greater than 2.25 v and less than 2.30 v, the lighting voltage of the second light emitting diode D2 is greater than 2.50 v and less than 2.55 v, and the lighting voltage of the first light emitting diode D1 is less than the lighting voltage of the second light emitting diode D2.
In the embodiment of the present invention, the first pixel PX1 includes a first light emitting diode D1, a pixel driving circuit PD which drives the first light emitting diode D1 to emit light; the second pixel PX2 includes a second light emitting diode D2, a pixel driving circuit PD, and the pixel driving circuit PD drives the second light emitting diode D2 to emit light; the pixel driving circuit PD supplies a driving current to the first light emitting diode D1 equal to a driving current supplied to the second light emitting diode D2 by the pixel driving circuit PD. The on-off voltage of the first light-emitting diode D1 is lower than the on-off voltage of the second light-emitting diode D2, and the luminance-voltage characteristics of the first light-emitting diode D1 are different from those of the second light-emitting diode D2; the brightness of the first light emitting diode D1 is equal to the brightness of the second light emitting diode D2, and the voltage across the first light emitting diode D1 is less than the voltage across the second light emitting diode D2. In the first pixel PX1, the pixel driving circuit PD is configured to control the potential of the first reference line RL1 to be transmitted to the first a electrode D11 of the first light emitting diode D1; in the second pixel PX2, the pixel driving circuit PD is configured to control the potential of the second reference line RL2 to be transmitted to the second gate electrode D21 of the second light emitting diode D2; the potential of the first reference line RL1 is smaller than the potential of the second reference line RL 2. The potential of the first electrode D11 of the first led D1 is less than the potential of the second first electrode D21 of the second led D2, the potential of the first second electrode D12 of the first led D1 is equal to the potential of the second electrode D22 of the second led D2, and the voltage across the first led D1 is less than the voltage across the second led D2, so that the brightness of the first led D1 is equal to the brightness of the second led D2, and the brightness of the display panel 200 is uniform. In addition, the first reference line RL1 is connected to the first pixel PX1 only and not the second pixel PX2, the second reference line RL2 is connected to the second pixel PX2 only and not the first pixel PX1 only, the load connected to the first reference line RL1 is reduced, the load connected to the second reference line RL2 is reduced, the voltage drop of the first reference line RL1 is reduced, the voltage drop of the second reference line RL2 is reduced, the potential of the first reference line RL1 is relatively uniform, and the potential of the second reference line RL2 is relatively uniform.
As shown in fig. 2, the first pixel PX1 includes a red pixel R and/or a green pixel G, and the second pixel PX2 includes a blue pixel B.
In the embodiment of the invention, the red pixel R utilizes a red light-emitting diode to realize light emission, the green pixel G utilizes a green light-emitting diode to realize light emission, the blue pixel B utilizes a blue light-emitting diode to realize light emission, and the organic light-emitting material of the red light-emitting diode, the organic light-emitting material of the green light-emitting diode and the organic light-emitting material of the blue light-emitting diode are different from each other; the difference between the brightness-voltage-across characteristic of the red light-emitting diode and the brightness-voltage-across characteristic of the green light-emitting diode is very small, the difference between the starting voltage of the red light-emitting diode and the starting voltage of the green light-emitting diode is less than 0.1V, the difference between the brightness-voltage-across characteristic of the red light-emitting diode and the brightness-voltage-across characteristic of the blue light-emitting diode is very large, the difference between the starting voltage of the red light-emitting diode and the starting voltage of the blue light-emitting diode is more than 0.1V, the difference between the brightness-voltage-across characteristic of the green light-emitting diode and the brightness-voltage-across characteristic of the blue light-emitting diode is very large, and the difference between the starting voltage of the green light-emitting diode and the starting voltage of the blue light-emitting diode is more than 0.1V; the pixel driving circuit of the red pixel R is electrically connected with the first reference line RL1, the pixel driving circuit of the green pixel G is electrically connected with the first reference line RL1, and the voltage across the red light-emitting diode is equal to the voltage across the green light-emitting diode, so that the brightness of the red light-emitting diode is basically equal to that of the green light-emitting diode; the pixel driving circuit of the red pixel R is electrically connected with the first reference line RL1, the pixel driving circuit of the blue pixel B is electrically connected with the second reference line RL2, and the voltage across the red light-emitting diode is less than that across the blue light-emitting diode, so that the brightness of the red light-emitting diode is equal to that of the blue light-emitting diode; the pixel driving circuit of the green pixel R is electrically connected with the first reference line RL1, the pixel driving circuit of the blue pixel B is electrically connected with the second reference line RL2, and the voltage across the green light-emitting diode is smaller than that across the blue light-emitting diode, so that the brightness of the green light-emitting diode is equal to that of the blue light-emitting diode.
As shown in fig. 3A, 3B, in the pixel driving circuit PD, in the initialization stage S1, the potential of the first reference line RL 1/the potential of the second reference line RL2 reaches the control electrode of the driving transistor T3; in the data writing phase S2, the data line DL charges the control electrode of the driving transistor T3, and the potential of the control electrode of the driving transistor T3 becomes the sum of the potential of the data line DL and the threshold voltage of the driving transistor T3; in the light emission control stage S3, the driving transistor T3 provides a driving current, the driving current is independent of the threshold voltage of the driving transistor T3, the driving current of the driving transistor T3 reaches the first light emitting diode D1/the second light emitting diode D2, and the first light emitting diode D1/the second light emitting diode D2 emits light. However, the excessively low potential of the first reference line RL 1/the potential of the second reference line RL2 reaches the control electrode of the driving transistor T3, the data line DL charges the control electrode of the driving transistor T3 for an excessively long time, the potential of the control electrode of the driving transistor T3 is less than the sum of the potential of the data line DL and the threshold voltage of the driving transistor T3, the driving current provided by the driving transistor T3 is related to the threshold voltage of the driving transistor T3, and the driving transistor T3 drives the first light emitting diode D1/the second light emitting diode D2 to emit uneven light, so that the image of the display panel 200 has sand-like spots (Sandy Mura).
Fig. 5 is another schematic structural diagram of a display panel according to an embodiment of the invention.
As shown in fig. 5, the first light emitting diode D1 includes a first electrode D11, a first organic functional layer D13, a first second organic functional layer D14, and a first second electrode D12, and the second light emitting diode D2 includes a second electrode D21, a second first organic functional layer D23, a second first organic functional layer D24, and a second electrode D22, wherein the first organic functional layer D13 is disconnected from the second first organic functional layer D23, and the first second organic functional layer D14 is connected to the second first organic functional layer D24. The first light emitting diode D1 is a red light emitting diode or a green light emitting diode, the second light emitting diode D2 is a blue light emitting diode, the first electrode D11 and the second electrode D21 are both anodes, the first electrode D12 and the second electrode D22 are both cathodes, the first organic functional layer D13 and the second organic functional layer D23 are both light emitting layers, and the first organic functional layer D14 and the second organic functional layer D24 are both electron injecting layers or electron transporting layers or hole injecting layers or hole transporting layers. However, the potential of the second reference line RL2 is too high, the cross voltage of the second light emitting diode D2 is too high, the pixel driving circuit PD drives the second light emitting diode D2 to emit light and does not drive the first light emitting diode D1 to emit light, there is a lateral current from the second organic functional layer D24 to the first organic functional layer D14, the turn-on voltage of the first light emitting diode D1 is smaller than the turn-on voltage of the second light emitting diode D2, and the first light emitting diode D1 lights up.
As shown in FIG. 2, the potential of first reference line RL1 and the potential of second reference line RL2 are both greater than-4 volts and less than-3 volts.
In an embodiment of the present invention, on the one hand, the potential of the first reference line RL1 and the potential of the second reference line RL2 are both greater than-4 volts, and the potential of the first reference line RL1 is less than the potential of the second reference line RL2, so as to prevent the potential of the first reference line RL1 and the potential of the second reference line RL2 from being too low to cause the image of the display panel 200 to have sand-like spots (Sandy Mura); on the other hand, the potential of the first reference line RL1 and the potential of the second reference line RL2 are both smaller than-3 volts, and the potential of the first reference line RL1 is smaller than the potential of the second reference line RL2, so as not to cause the first light-emitting diode D1 to sneak light because the potential of the first reference line RL1 and the potential of the second reference line RL2 are also too high.
As shown in FIG. 2, the difference between the potential of the first reference line RL1 and the potential of the second reference line RL2 is greater than 0.1 volts and less than 0.3 volts.
In the embodiment of the invention, on the one hand, the potential of the first reference line RL1 is less than that of the second reference line RL2, the difference between the potential of the first reference line RL1 and the potential of the second reference line RL2 is greater than 0.1 v, the voltage across the first light emitting diode D1 is less than that of the second light emitting diode D2, and the difference between the voltage across the first light emitting diode D1 and the voltage across the second light emitting diode D2 is large enough to make the brightness of the first light emitting diode D1 equal to that of the second light emitting diode D2; on the other hand, the difference between the potential of the first reference line RL1 and the potential of the second reference line RL2 is less than 0.3 v, so as to prevent the potential of the second reference line RL2 from being too high or the potential of the first reference line RL1 from being too low due to too large difference between the potential of the first reference line RL1 and the potential of the second reference line RL2, and prevent the image of the display panel 200 from being sneaked with sand-like spots (Sandy Mura) or the first light emitting diode D1.
As shown in FIG. 2, the resistivity of the first reference line RL1 is less than the resistivity of the second reference line RL 2.
In the embodiment of the present invention, the first reference line RL1 is connected to the first pixel PX1, the first pixel PX1 includes a red pixel R and a green pixel G, the second reference line RL2 is connected to the second pixel PX2, the second pixel PX2 includes a blue pixel B, and the load resistance connected to the first reference line RL1 is greater than the load resistance connected to the second reference line RL 2. The resistivity of the first reference line RL1 is less than that of the second reference line RL2, and the self-resistance of the first reference line RL1 is less than that of the second reference line RL 2. The sum of the load resistance connected to the first reference line RL1 and the self-resistance of the first reference line RL1 is equal to the sum of the load resistance connected to the second reference line RL2 and the self-resistance of the second reference line RL 2. The voltage drop of the first reference line RL1 is equal to the voltage drop of the second reference line RL 2. The potential of the first reference line RL1 is relatively uniform, and the potential of the second reference line RL2 is relatively uniform.
As shown in FIG. 2, the cross-sectional area of the first reference line RL1 is greater than the cross-sectional area of the second reference line RL 2.
In the embodiment of the present invention, the first reference line RL1 is connected to the first pixel PX1, the first pixel PX1 includes a red pixel R and a green pixel G, the second reference line RL2 is connected to the second pixel PX2, the second pixel PX2 includes a blue pixel B, and the load resistance connected to the first reference line RL1 is greater than the load resistance connected to the second reference line RL 2. The cross-sectional area of the first reference line RL1 is smaller than that of the second reference line RL2, and the self-resistance of the first reference line RL1 is smaller than that of the second reference line RL 2. The sum of the load resistance connected to the first reference line RL1 and the self-resistance of the first reference line RL1 is equal to the sum of the load resistance connected to the second reference line RL2 and the self-resistance of the second reference line RL 2. The voltage drop of the first reference line RL1 is equal to the voltage drop of the second reference line RL 2. The potential of the first reference line RL1 is relatively uniform, and the potential of the second reference line RL2 is relatively uniform.
FIG. 6 is a schematic view of another structure of a display panel according to an embodiment of the present invention; FIG. 7 is a schematic view of another structure of a display panel according to an embodiment of the present invention; FIG. 8 is a schematic view of another structure of a display panel according to an embodiment of the present invention; fig. 9 is another schematic structural diagram of a display panel according to an embodiment of the invention.
As shown in fig. 6 to 9, the display panel 200 further includes a first conductive layer M1, a second conductive layer MC1, and a third conductive layer M2, wherein the second conductive layer MC1 is located between the first conductive layer M1 and the third conductive layer M2; the display panel 200 further includes a gate line GL on the first conductive layer M1 and a data line DL on the third conductive layer M2; the first reference line RL1 is located on the second conductive layer MC1, and the second reference line RL2 is not located on the second conductive layer MC 1.
In the embodiment of the present invention, the gate line GL includes a first scan line SL1, a second scan line SL2, and an emission line EL. The first reference line RL1 is located on the second conductive layer MC1, and the second reference line RL2 is located on the other conductive layer except for the second conductive layer MC 1. For example, the second reference line RL2 is located on the side of the third conductive layer M2 away from the first conductive layer M1, or the second reference line RL2 is located between the second conductive layer MC1 and the third conductive layer M2. The first reference line RL1 and the second reference line RL2 are positioned on two different conductive layers, and the first reference line RL1 and the second reference line RL2 do not influence each other.
As shown in fig. 6 and 7, the display panel 200 further includes a fourth conductive layer RE located on a side of the third conductive layer M2 away from the first conductive layer M1; the first and second electrodes D11 and D21 of the first and second light emitting diodes D1 and D2 are both located on the fourth conductive layer RE; the second reference line RL2 is located on the fourth conductive layer RE.
In the embodiment of the invention, the first electrode D11 of the first light emitting diode D1 is an anode of the first light emitting diode D1, and the second electrode D21 of the second light emitting diode D2 is an anode of the second light emitting diode D2. The first scan line SL1, the second scan line SL2, and the emission line EL are all located on the first conductive layer M1, the first reference line RL1 is located on the second conductive layer MC1, the data line DL is located on the third conductive layer M2, the anode of the first light-emitting diode D1 and the anode of the second light-emitting diode D2 are all located on the fourth conductive layer RE, and the first conductive layer M1, the second conductive layer MC1, the third conductive layer M2, and the fourth conductive layer RE are all existing conductive layers. The second reference line RL2 is located on the fourth conductive layer RE but not on the non-existing conductive layer, and the second reference line RL2, the anode of the first light emitting diode D1, and the anode of the second light emitting diode D2 are simultaneously manufactured by patterning the fourth conductive layer RE so as not to manufacture the second reference line RL2 by patterning the non-existing conductive layer. The first reference line RL1 and the second reference line RL2 are positioned on two different conductive layers, and the first reference line RL1 and the second reference line RL2 do not influence each other.
As shown in fig. 8 and 9, the display panel 200 further includes a fifth conductive layer MC2, the fifth conductive layer MC2 is located between the second conductive layer MC1 and the third conductive layer M2; the second reference line RL2 is located on the fifth conductive layer MC 2.
In the embodiment of the present invention, the first scan line SL1, the second scan line SL2, and the emission line EL are all located on the first conductive layer M1, the first reference line RL1 is located on the second conductive layer MC1, the data line DL is located on the third conductive layer M2, the anode of the first light emitting diode D1 and the anode of the second light emitting diode D2 are all located on the fourth conductive layer RE, and the first conductive layer M1, the second conductive layer MC1, the third conductive layer M2, and the fourth conductive layer RE are all existing conductive layers. The second reference line RL2 is located at the fifth conductive layer MC2 and not at the existing conductive layer so as not to affect the first scan line SL1, the second scan line SL2, the emission line EL, the first reference line RL1, the data line DL, the anode of the first light emitting diode D1, and the anode of the second light emitting diode D2 by the second reference line RL 2.
As shown in fig. 2, the first reference line RL1 extends in the same direction as the gate lines, and the second reference line RL2 extends in the same direction as the gate lines.
In the embodiment of the invention, the extending direction of the gate line is a transverse direction, the extending direction of the data line is a longitudinal direction, and the length of the gate line in the transverse direction is smaller than that of the data line in the longitudinal direction. The extending direction of the first reference line RL1 is the same as the extending direction of the gate line, the extending direction of the second reference line RL2 is the same as the extending direction of the gate line, the extending direction of the first reference line RL1 and the extending direction of the second reference line RL2 are both transverse rather than longitudinal, the length of the first reference line RL1 in the transverse direction and the length of the second reference line RL2 in the transverse direction are both smaller, the self-resistance of the first reference line RL1 and the self-resistance of the second reference line RL2 are both smaller, the voltage drop of the first reference line RL1 and the voltage drop of the second reference line RL2 are both smaller, the potential of the first reference line RL1 is more uniform, and the potential of the second reference line RL2 is more uniform.
Fig. 10 is a schematic structural diagram of a display panel according to an embodiment of the invention.
As shown in fig. 10, a plurality of first reference lines RL1 are arranged in the extending direction of the gate lines, and a plurality of second reference lines RL2 are arranged in the extending direction of the gate lines.
In the embodiment of the present invention, the extending direction of the gate lines is a transverse direction, the extending direction of the data lines is a longitudinal direction, the data lines are arranged in the transverse direction and are not arranged in the longitudinal direction, and the number of the data lines is equal to the number of columns of pixel columns in the transverse direction and is less than the number of rows of pixel rows in the longitudinal direction. The plurality of first reference lines RL1 are arranged in the extending direction of the gate lines, the plurality of second reference lines RL2 are arranged in the extending direction of the gate lines, the plurality of first reference lines RL1 and the plurality of second reference lines RL2 are all arranged in the transverse direction without being arranged in the longitudinal direction, the sum of the number of first reference lines RL1 and the number of second reference lines RL2 is equal to the number of columns of pixel columns in the transverse direction and is smaller than the number of rows of pixel rows in the longitudinal direction, and the first reference lines RL1 and the second reference lines RL2 are reduced and simplified.
Fig. 11 is another schematic structural diagram of a display panel according to an embodiment of the invention.
As shown in fig. 11, the first reference line RL1 extends in the same direction as the gate line, and the second reference line RL2 extends in the same direction as the data line.
In the embodiment of the invention, the extending direction of the gate line is a transverse direction, the extending direction of the data line is a longitudinal direction, and the length of the gate line in the transverse direction is smaller than that of the data line in the longitudinal direction. The extending direction of the first reference line RL1 is the same as the extending direction of the gate line, the extending direction of the second reference line RL2 is the same as the extending direction of the data line, the extending direction of the first reference line RL1 is the transverse direction, the extending direction of the second reference line RL2 is the longitudinal direction, the length of the first reference line RL1 in the transverse direction is smaller than the length of the second reference line RL2 in the longitudinal direction, and the self-resistance of the first reference line RL1 is smaller than the self-resistance of the second reference line RL 2. The first reference line RL1 is connected to the first pixel PX1, the first pixel PX1 includes a red pixel R and a green pixel G, the second reference line RL2 is connected to the second pixel PX2, the second pixel PX2 includes a blue pixel B, and the load resistance connected to the first reference line RL1 is greater than the load resistance connected to the second reference line RL 2. The sum of the load resistance connected to the first reference line RL1 and the self-resistance of the first reference line RL1 is equal to the sum of the load resistance connected to the second reference line RL2 and the self-resistance of the second reference line RL 2. The voltage drop of the first reference line RL1 is equal to the voltage drop of the second reference line RL 2. The potential of the first reference line RL1 is relatively uniform, and the potential of the second reference line RL2 is relatively uniform.
As shown in fig. 2, the pixel driving circuit PD further includes a first initialization transistor T5, a second initialization transistor T7, a data writing transistor T2, a first light emission controlling transistor T1, a second light emission controlling transistor T6, a storage capacitor C; a first electrode of the first initializing transistor T5 is electrically connected to the control electrode of the driving transistor T3; a first electrode of the second initialization transistor T7 is electrically connected to the first electrode D11 of the first light emitting diode D1 or the second electrode D21 of the second light emitting diode D2; the first electrode of the data write transistor T2 is electrically connected to the first electrode of the driving transistor T3; a first electrode of the first light emission controlling transistor T1 is electrically connected to a first electrode of the driving transistor T3; a first electrode of the second light emission controlling transistor T6 is electrically connected to the second electrode of the driving transistor T3, and a second electrode of the second light emission controlling transistor T6 is electrically connected to the first electrode D11 of the first light emitting diode D1 or the second electrode D21 of the second light emitting diode D2; the first electrode of the storage capacitor C is electrically connected to the control electrode of the driving transistor T3.
Fig. 12 is a schematic structural diagram of a display device according to an embodiment of the invention.
As shown in fig. 12, the display device 300 includes a display panel 200.
In the embodiment of the present invention, the display device 300 implements display by using the display panel 200, such as a smart phone or the like. The display panel 200 is described above and will not be described in detail.
In summary, the present invention provides a display panel and a display device. The display panel comprises a first pixel and a first reference line which are connected, and a second pixel and a second reference line which are connected; the first pixel comprises a first light emitting diode and a pixel driving circuit, the second pixel comprises a second light emitting diode and a pixel driving circuit, and the pixel driving circuit comprises a driving transistor and a compensating transistor; in the pixel driving circuit, the compensation transistor is used for detecting the threshold voltage of the driving transistor; in the first pixel, the pixel driving circuit is used for controlling the potential of the first reference line to be transmitted to the first A electrode of the first light-emitting diode; in the second pixel, the pixel driving circuit is used for controlling the potential of the second reference line to be transmitted to the second electrode of the second light-emitting diode; the lighting voltage of the first light emitting diode is smaller than that of the second light emitting diode, and the potential of the first reference line is smaller than that of the second reference line. In the present invention, the brightness of the display panel is uniform.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (11)

1. A display panel is characterized by comprising a first pixel and a first reference line which are connected, and a second pixel and a second reference line which are connected;
the first pixels include red pixels and/or green pixels, and the second pixels include blue pixels;
the first pixel comprises a first light emitting diode and a pixel driving circuit, the second pixel comprises a second light emitting diode and the pixel driving circuit, and the pixel driving circuit comprises a driving transistor and a compensating transistor;
in the pixel driving circuit, the compensation transistor is used for detecting the threshold voltage of the driving transistor;
in the first pixel, the pixel driving circuit is used for controlling the potential of the first reference line to be transmitted to a first electrode of the first light-emitting diode;
in the second pixel, the pixel driving circuit is used for controlling the potential of the second reference line to be transmitted to the second electrode of the second light-emitting diode;
the lighting voltage of the first light emitting diode is smaller than that of the second light emitting diode, and the potential of the first reference line is smaller than that of the second reference line;
the potential of the first reference line and the potential of the second reference line are both greater than-4 volts and less than-3 volts;
the difference between the potential of the first reference line and the potential of the second reference line is greater than 0.1 volts and less than 0.3 volts.
2. The display panel of claim 1, wherein the resistivity of the first reference line is less than the resistivity of the second reference line.
3. The display panel of claim 1, wherein the cross-sectional area of the first reference line is greater than the cross-sectional area of the second reference line.
4. The display panel according to claim 1, further comprising a first conductive layer, a second conductive layer, and a third conductive layer, wherein the second conductive layer is located between the first conductive layer and the third conductive layer;
the display panel further comprises a gate line and a data line, wherein the gate line is located on the first conductive layer, and the data line is located on the third conductive layer;
the first reference line is located on the second conductive layer, and the second reference line is not located on the second conductive layer.
5. The display panel according to claim 4, wherein the display panel further comprises a fourth conductive layer on a side of the third conductive layer away from the first conductive layer;
the first electrode of the first light-emitting diode and the second electrode of the second light-emitting diode are both positioned on the fourth conducting layer;
the second reference line is located on the fourth conductive layer.
6. The display panel according to claim 4, wherein the display panel further comprises a fifth conductive layer between the second conductive layer and the third conductive layer;
the second reference line is located on the fifth conductive layer.
7. The display panel according to claim 4, wherein the first reference line extends in the same direction as the gate line, and wherein the second reference line extends in the same direction as the gate line.
8. The display panel according to claim 4, wherein a plurality of the first reference lines are arranged in an extending direction of the gate lines, and a plurality of the second reference lines are arranged in the extending direction of the gate lines.
9. The display panel according to claim 4, wherein the first reference line extends in the same direction as the gate line, and the second reference line extends in the same direction as the data line.
10. The display panel according to claim 1, wherein the pixel driving circuit further comprises a first initialization transistor, a second initialization transistor, a data writing transistor, a first light emission control transistor, a second light emission control transistor, a storage capacitor;
the first electrode of the first initialization transistor is electrically connected with the control electrode of the driving transistor;
the first electrode of the second initialization transistor is electrically connected with the first electrode of the first light-emitting diode or the second first electrode of the second light-emitting diode;
the first electrode of the data writing transistor is electrically connected with the first electrode of the driving transistor;
the first electrode of the first light-emitting control transistor is electrically connected with the first electrode of the driving transistor;
a first electrode of the second light-emitting control transistor is electrically connected with a second electrode of the driving transistor, and a second electrode of the second light-emitting control transistor is electrically connected with a first electrode of the first light-emitting diode or a second electrode of the second light-emitting diode;
the first electrode of the storage capacitor is electrically connected to the control electrode of the driving transistor.
11. A display device characterized by comprising the display panel according to any one of claims 1 to 10.
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Publication number Priority date Publication date Assignee Title
CN110675821B (en) * 2019-09-30 2020-11-27 上海天马有机发光显示技术有限公司 Display panel, display device and driving method of display panel
CN111463254B (en) * 2020-04-30 2022-04-19 武汉天马微电子有限公司 Display panel and display device
CN111429844B (en) * 2020-04-30 2021-11-05 武汉天马微电子有限公司 Display panel and display device
CN112863438A (en) * 2021-01-19 2021-05-28 武汉华星光电半导体显示技术有限公司 Display panel and display device
CN112863428B (en) * 2021-01-25 2022-07-01 京东方科技集团股份有限公司 Pixel circuit, driving method, display panel and display device
CN115699148A (en) * 2021-05-24 2023-02-03 京东方科技集团股份有限公司 Display substrate, driving method thereof and display device
KR20230109211A (en) * 2022-01-12 2023-07-20 삼성디스플레이 주식회사 Display panel
CN116168632A (en) 2022-12-29 2023-05-26 武汉天马微电子有限公司 Display panel, driving circuit and display device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104252836A (en) * 2013-06-26 2014-12-31 乐金显示有限公司 Organic light emitting diode display device
CN109243369A (en) * 2018-09-28 2019-01-18 昆山国显光电有限公司 Display panel, the driving method of pixel circuit and display device
CN109285500A (en) * 2018-12-05 2019-01-29 武汉天马微电子有限公司 Pixel driving circuit and organic light emitting display device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101859474B1 (en) * 2011-09-05 2018-05-23 엘지디스플레이 주식회사 Pixel circuit of organic light emitting diode display device
KR102091485B1 (en) * 2013-12-30 2020-03-20 엘지디스플레이 주식회사 Organic light emitting display device and method for driving thereof
KR102216995B1 (en) * 2014-06-26 2021-02-22 삼성디스플레이 주식회사 Organic light emitting display device
KR102168879B1 (en) * 2014-07-10 2020-10-23 엘지디스플레이 주식회사 Organic Light Emitting Display For Sensing Degradation Of Organic Light Emitting Diode
CN106409233B (en) * 2016-11-28 2019-08-06 上海天马有机发光显示技术有限公司 A kind of pixel circuit, its driving method and organic light emitting display panel
CN106910468B (en) * 2017-04-28 2019-05-10 上海天马有机发光显示技术有限公司 The driving method of display panel, display device and pixel circuit
CN109192143A (en) * 2018-09-28 2019-01-11 昆山国显光电有限公司 Pixel circuit and its driving method, display panel, display device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104252836A (en) * 2013-06-26 2014-12-31 乐金显示有限公司 Organic light emitting diode display device
CN109243369A (en) * 2018-09-28 2019-01-18 昆山国显光电有限公司 Display panel, the driving method of pixel circuit and display device
CN109285500A (en) * 2018-12-05 2019-01-29 武汉天马微电子有限公司 Pixel driving circuit and organic light emitting display device

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