CN107945743A - A kind of image element circuit, its driving method and display device - Google Patents
A kind of image element circuit, its driving method and display device Download PDFInfo
- Publication number
- CN107945743A CN107945743A CN201810007456.9A CN201810007456A CN107945743A CN 107945743 A CN107945743 A CN 107945743A CN 201810007456 A CN201810007456 A CN 201810007456A CN 107945743 A CN107945743 A CN 107945743A
- Authority
- CN
- China
- Prior art keywords
- switching transistor
- transistor
- driving transistor
- pole
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 15
- 238000007667 floating Methods 0.000 claims description 5
- 230000014759 maintenance of location Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 20
- 230000009471 action Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241001270131 Agaricus moelleri Species 0.000 description 1
- 206010047571 Visual impairment Diseases 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229920001690 polydopamine Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000010409 thin film Substances 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
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3266—Details of drivers for scan electrodes
-
- 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
- G09G2320/0257—Reduction of after-image effects
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a kind of image element circuit, its driving method and display device, wherein image element circuit includes：Data write. module, the first light emitting control module, the second light emitting control module, threshold value compensation module, anode reseting module, capacitance module, driving transistor and light emitting diode；In reseting stage, the anode of light emitting diode is resetted using anode reseting module, the anode of the light emitting diode of second light emitting control module control at the same time is turned on the second pole of driving transistor, and the grid of threshold value compensation module control driving transistor is turned on the first pole of driving transistor；So that the voltage of the first pole of driving transistor discharges until driving transistor is in cut-off state to anode reseting module direction, so that it is guaranteed that the gate source voltage of driving transistor is a steady state value, from the influence of last signal/picture, so as to solve image retention problem.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a pixel circuit, a driving method thereof, and a display device.
Background
Organic Light Emitting Diode (OLED) displays are one of the hot spots in the research field of flat panel displays, and compared with Liquid Crystal displays, OLED displays have the advantages of low energy consumption, low production cost, self-luminescence, wide viewing angle, fast response speed, etc. at present, OLED displays have begun to replace the conventional Liquid Crystal Display (LCD) in the flat panel Display fields of mobile phones, PDAs, digital cameras, etc. The pixel circuit design is the core technical content of the OLED display, and has important research significance.
As shown in fig. 1a, when a displayed image has both a high gray scale and a low gray scale, and the image is to be switched to a gray scale image with the same gray scale as shown in fig. 1b after being displayed for a period of time, due to the hysteresis effect of the driving transistor of the pixel circuit, the I-V curves of the forward scanning and the reverse scanning of the gate-source voltage Vgs of the driving transistor are not overlapped. For example, when the gray level is switched from the gray level L255 to the gray level L128 and the gray level is switched from the gray level L0 to the gray level L128, the driving current is different due to the different changing directions of the gate-source voltage Vgs of the driving transistor, and the afterimage is generated due to the different pixel brightness, as shown in fig. 1c, and the image shown in fig. 1b is changed after the period of time in fig. 1 c.
Disclosure of Invention
The embodiment of the invention provides a pixel circuit, a driving method thereof and a display device, which are used for improving the residual image problem of a display panel.
The embodiment of the invention provides a pixel circuit, which comprises: the device comprises a data writing module, a first light emitting control module, a second light emitting control module, a threshold compensation module, an anode resetting module, a capacitor module, a driving transistor and a light emitting diode; wherein,
the anode reset module is used for resetting the anode of the light-emitting diode in a reset stage;
the data writing module is used for writing a data signal into the first pole of the driving transistor in a data writing stage;
the threshold compensation module is used for controlling the grid electrode of the driving transistor to be conducted with the second pole of the driving transistor in the reset phase and the data writing phase;
the first light-emitting control module is used for providing power supply voltage to the first electrode of the driving transistor in a light-emitting stage;
the second light-emitting control module is used for controlling the conduction of the anode of the light-emitting diode and the second electrode of the driving transistor in the reset phase and the light-emitting phase;
the driving transistor is used for driving the light emitting diode to emit light in the light emitting stage;
the capacitance module is used for keeping the grid voltage of the driving transistor stable when the grid of the driving transistor is in floating connection.
Optionally, in the pixel circuit provided in the embodiment of the present invention, the anode reset module includes a first switching transistor; wherein,
the grid electrode of the first switch transistor is connected with the reset control end or the first scanning signal end, the first pole of the first switch transistor is connected with the initialization signal end, and the second pole of the first switch transistor is connected with the anode of the light-emitting diode.
Optionally, in the pixel circuit provided in the embodiment of the present invention, the data writing module includes a second switching transistor, the threshold compensation module includes a third switching transistor, and the capacitance module includes a capacitance; wherein,
the grid electrode of the second switch transistor is connected with a second scanning signal end, the first pole of the second switch transistor is connected with the first pole of the driving transistor, and the second pole of the second switch transistor is connected with a data signal end;
the grid electrode of the third switching transistor is connected with the reset control end, the first pole of the third switching transistor is connected with the grid electrode of the driving transistor, and the second pole of the third switching transistor is connected with the second pole of the driving transistor;
one end of the capacitor is connected with a first power supply voltage end, and the other end of the capacitor is connected with the grid electrode of the driving transistor.
Optionally, in the pixel circuit provided in the embodiment of the present invention, the first light-emitting control module includes a fourth switching transistor, and the second light-emitting control module includes a fifth switching transistor;
the grid electrode of the fourth switching transistor is connected with the first light-emitting control end, the first electrode of the fourth switching transistor is connected with the first power supply voltage end, and the second electrode of the fourth switching transistor is connected with the first electrode of the driving transistor;
the grid electrode of the fifth switching transistor is connected with the second light-emitting control end or the second scanning signal end, the first pole of the fifth switching transistor is connected with the second pole of the driving transistor, and the second pole of the fifth switching transistor is connected with the anode of the light-emitting diode.
Optionally, in the pixel circuit provided in the embodiment of the present invention, a gate of the first switching transistor is connected to the reset control terminal, and a gate of the fifth switching transistor is connected to the second light-emitting control terminal;
the driving transistor, the first switching transistor, the second switching transistor and the third switching transistor are P-type transistors, and the fourth switching transistor and the fifth switching transistor are N-type transistors; or,
the driving transistor, the second switching transistor, the fourth switching transistor and the fifth switching transistor are P-type transistors, and the first switching transistor and the third switching transistor are N-type transistors.
Optionally, in the pixel circuit provided in the embodiment of the present invention, a gate of the first switching transistor is connected to the reset control terminal, and a gate of the fifth switching transistor is connected to the second scan signal terminal;
the driving transistor, the second switching transistor and the fourth switching transistor are P-type transistors, and the first switching transistor, the third switching transistor and the fifth switching transistor are N-type transistors; or,
the driving transistor, the fourth switching transistor and the fifth switching transistor are P-type transistors, and the first switching transistor, the second switching transistor and the third switching transistor are N-type transistors.
Optionally, in the pixel circuit provided in this embodiment of the present invention, a gate of the first switching transistor is connected to the first scan signal terminal, and a gate of the fifth switching transistor is connected to the second light emission control signal terminal;
the driving transistor, the first switching transistor, the second switching transistor, the fourth switching transistor and the fifth switching transistor are P-type transistors, and the third switching transistor is an N-type transistor; or,
the driving transistor and the third switching transistor are P-type transistors, and the first switching transistor, the second switching transistor, the fourth switching transistor and the fifth switching transistor are N-type transistors.
Optionally, in the pixel circuit provided in the embodiment of the present invention, the reset control terminal and the first light-emitting control terminal are the same terminal.
Correspondingly, the embodiment of the invention also provides a display device which comprises any one of the pixel circuits provided by the embodiment of the invention.
Correspondingly, an embodiment of the present invention further provides a driving method of the pixel circuit, including:
in a reset stage, the anode reset module resets the anode of the light emitting diode, the second light emitting control module controls the anode of the light emitting diode to be conducted with the second pole of the driving transistor, and the threshold compensation module controls the gate of the driving transistor to be conducted with the first pole of the driving transistor;
in a writing stage, the data writing module writes a data signal into the first pole of the driving transistor, and the threshold compensation module controls the grid electrode of the driving transistor to be conducted with the first pole of the driving transistor;
in a light emitting stage, the first light emitting control module provides a power voltage to a first pole of the driving transistor, the second light emitting control module controls the conduction of an anode of the light emitting diode and a second pole of the driving transistor, the driving transistor controls the light emitting diode to emit light, and the capacitor module keeps the grid voltage of the driving transistor stable.
The invention has the following beneficial effects:
the pixel circuit, the driving method thereof and the display device provided by the embodiment of the invention comprise: the device comprises a data writing module, a first light emitting control module, a second light emitting control module, a threshold compensation module, an anode resetting module, a capacitor module, a driving transistor and a light emitting diode; in the resetting stage, the anode of the light-emitting diode is reset by using the anode resetting module, meanwhile, the second light-emitting control module controls the conduction of the anode of the light-emitting diode and the second pole of the driving transistor, and the threshold compensation module controls the conduction of the grid of the driving transistor and the first pole of the driving transistor; therefore, the voltage of the first electrode of the driving transistor is discharged towards the anode reset module until the driving transistor is in a cut-off state, the gate-source voltage of the driving transistor is ensured to be a constant value and is not influenced by the last signal/picture, and the problem of image retention is solved.
Drawings
FIGS. 1a to 1c are schematic diagrams of conventional pixel circuits displaying different gray scales;
fig. 2 is a schematic structural diagram of a pixel circuit according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
fig. 4 is a second schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
fig. 5 is a third schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
FIG. 6 is a fourth exemplary schematic diagram of a pixel circuit according to an embodiment of the present invention;
fig. 7 is a fifth exemplary schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
fig. 8 is a sixth schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
fig. 9 is a seventh schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
fig. 10 is an eighth schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
fig. 11 is a ninth schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
FIG. 12 is an input timing diagram corresponding to the pixel circuit shown in FIG. 3;
FIG. 13 is an input timing diagram for the pixel circuit shown in FIG. 4;
FIG. 14 is an input timing diagram for the pixel circuit shown in FIG. 5;
FIG. 15 is an input timing diagram for the pixel circuit shown in FIG. 6;
FIG. 16 is an input timing diagram for the pixel circuit shown in FIG. 7;
FIG. 17 is an input timing diagram for the pixel circuit shown in FIG. 8;
FIG. 18 is an input timing diagram for the pixel circuit shown in FIG. 9;
FIG. 19 is an input timing diagram for the pixel circuit shown in FIG. 10;
fig. 20 is an input timing chart corresponding to the pixel circuit shown in fig. 11;
fig. 21 is a flowchart illustrating a driving method of a pixel circuit according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, specific embodiments of a pixel circuit, a driving method thereof and an organic electroluminescent display panel according to an embodiment of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments described below are only for illustrating and explaining the present invention and are not to be used for limiting the present invention. And the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The shapes and sizes of the various elements in the drawings are not to scale and are merely intended to illustrate the invention.
As shown in fig. 2, a pixel circuit according to an embodiment of the present invention includes: the device comprises a data writing module 2, a first light-emitting control module 4, a second light-emitting control module 5, a threshold compensation module 3, an anode reset module 1, a capacitance module 6, a driving transistor DT and a light-emitting diode oled; wherein,
the anode reset module 1 is used for resetting the anode of the light emitting diode oled in the reset stage;
the data writing module 2 is used for writing a data signal into the first pole of the driving transistor DT in a data writing phase;
the threshold compensation module 3 is used for controlling the grid electrode of the driving transistor DT to be conducted with the second pole of the driving transistor DT in the reset phase and the data writing phase;
the first light emitting control module 4 is used for providing a power supply voltage to the first pole of the driving transistor DT in a light emitting phase;
the second light-emitting control module 5 is used for controlling the conduction of the anode of the light-emitting diode oled and the second electrode of the driving transistor DT in the reset phase and the light-emitting phase;
the driving transistor DT is used for driving the light emitting diode to emit light in a light emitting stage;
the capacitance module 6 is used for keeping the gate voltage of the driving transistor DT stable when the gate of the driving transistor DT is floating.
In the pixel circuit provided by the embodiment of the invention, in a reset stage, the anode of the light emitting diode is reset by using the anode reset module, meanwhile, the second light emitting control module controls the conduction of the anode of the light emitting diode and the second pole of the driving transistor, and the threshold compensation module controls the conduction of the grid of the driving transistor and the first pole of the driving transistor; thereby discharging the voltage of the first electrode of the driving transistor towards the anode reset module until the driving transistor is in a cut-off state, thereby ensuring that the gate-source voltage Vgs of the driving transistor is a constant value and is not influenced by the last signal/picture, and solving the problem of image retention.
And the data writing module is used for writing data signals in a data writing stage, and the threshold compensation module is used for controlling the grid electrode of the driving transistor and the second electrode of the driving transistor to be conducted in the data writing stage so as to compensate the threshold voltage drift of the driving transistor, so that the problem of uneven display caused by the threshold voltage drift of the driving transistor due to process and transistor aging is solved through internal compensation.
In the embodiment of the present invention, the reset phase, the data write phase, and the light-emitting phase are sequentially generated.
The present invention will be described in detail with reference to specific examples. It should be noted that the present embodiment is intended to better explain the present invention, but not to limit the present invention.
Alternatively, in the pixel circuit provided in the embodiment of the present invention, as shown in fig. 3 to 11, the anode reset module 1 includes a first switching transistor M1; wherein,
as shown in fig. 3 to 6, the Gate of the first switching transistor M1 is connected to the reset control terminal Comp, or as shown in fig. 7 and 8, the Gate of the first switching transistor M1 is connected to the first scan signal terminal Gate 1;
a first pole of the first switching transistor M1 is connected to the initialization signal terminal Vint, and a second pole of the first switching transistor MI is connected to the anode of the light emitting diode oled.
Optionally, in the pixel circuit provided in the embodiment of the present invention, as shown in fig. 3 to 11, the data writing module 2 includes a second switching transistor M2, the threshold compensation module 3 includes a third switching transistor M3, and the capacitance module 6 includes a capacitor C1; wherein,
a gate electrode of the second switching transistor M2 is connected to the second scan signal terminal, a first electrode of the second switching transistor M2 is connected to the first electrode of the driving transistor DT, and a second electrode of the second switching transistor M2 is connected to the Data signal terminal Data;
the gate of the third switching transistor M3 is connected to the reset control terminal Comp, the first pole of the third switching transistor M3 is connected to the gate of the driving transistor DT, and the second pole of the third switching transistor M3 is connected to the second pole of the driving transistor DT;
one terminal of the capacitor C1 is connected to the first power voltage terminal VDD, and the other terminal of the capacitor C1 is connected to the gate of the driving transistor DT.
Alternatively, in the pixel circuit provided in the embodiment of the present invention, as shown in fig. 3 to 11, the first light emission control module 4 includes a fourth switching transistor M4, and the second light emission control module 5 includes a fifth switching transistor M5;
a gate electrode of the fourth switching transistor M4 is connected to the first light emitting control terminal EM1, a first electrode of the fourth switching transistor M4 is connected to the first power voltage terminal VDD, and a second electrode of the fourth switching transistor M4 is connected to the first electrode of the driving transistor DT;
as shown in fig. 3, 4, 7, 8, 9 and 11, the Gate of the fifth switching transistor M5 is connected to the second light emission control terminal EM2, or as shown in fig. 5, 6 and 10, the Gate of the fifth switching transistor M5 is connected to the second scan signal terminal Gate 2;
a first pole of the fifth switching transistor M5 is connected to the second pole of the driving transistor DT, and a second pole of the fifth switching transistor M5 is connected to the anode of the light emitting diode oled.
The above is merely an example of the specific structure of each block in the pixel circuit, and in the specific implementation, the specific structure of each block is not limited to the above structure provided in the embodiment of the present invention, and may be other structures known to those skilled in the art, and is not limited herein.
Specifically, in the pixel circuit provided by the embodiment of the invention, as shown in fig. 3 to fig. 11, the cathode of the light emitting diode oled is connected to the second power voltage terminal VEE, and the voltage of the second power voltage terminal VEE is generally a negative voltage or ground.
In the pixel circuit provided by the embodiment of the invention, in the reset stage, it is required to ensure that the first switching transistor M1, the third switching transistor M3 and the fifth switching transistor M5 are turned on, and the second switching transistor M2 and the fourth switching transistor M4 are turned off. In this stage, the signal of the initialization signal terminal Vint is transmitted to the first node N1 through the turned-on first switching transistor M1, the turned-on fifth switching transistor M5 and the turned-on third switching transistor M3 in sequence, so that the driving transistor DT is turned on, and the second node N2 is in a floating state (floating), so that the voltage of the second node N2 is discharged toward the initialization signal terminal Vint, and the driving transistor DT is turned off until the voltage of the second node N2 becomes Vint-Vth, so that the driving transistor DT is in a turned-off state. In the data writing stage, it is necessary to ensure that the second switching transistor M2 and the third switching transistor M3 are turned on, the fourth switching transistor M4 and the fifth switching transistor M5 are turned off, and the first switching transistor M1 starts to be turned on or turned off, whereAnd are not limited. The Data signal at the Data signal terminal Data is transmitted to the second node N2 through the turned-on second switching transistor M2, the voltage at the second node N2 becomes Vdata, the driving transistor DT is turned on, the voltage at the first node N1 is charged to Vdata + Vth, and the driving transistor DT is turned off. The writing of the data signal is thus achieved at this stage, and the threshold voltage Vth of the driving transistor DT is locked. In the light emitting period, the fourth switching transistor M4 and the fifth switching transistor M5 are turned on, and the first switching transistor M1, the second switching transistor M2 and the third switching transistor M3 are turned off. In this stage, the power voltage of the first power voltage terminal VDD is transmitted to the second node N2 through the turned-on fourth switching transistor M4, the voltage of the second node N2 becomes VDD, and the voltage of the first node N1 is still Vdata + Vth due to the effect of the capacitor C1. The driving transistor DT is operated in a saturation state, and as can be seen from the current characteristic in the saturation state, the operating current I flowing through the driving transistor DT and used for driving the light emitting diode oled to emit light satisfies the formula: k (V)gs–Vth)2＝K(Vdata+Vth-VDD–Vth)2＝K(Vdata-VDD)2Where K is a structural parameter, this number is relatively stable in the same structure and can be calculated as a constant. Therefore, the working current of the organic light emitting diode oled is not affected by the threshold voltage Vth of the driving transistor DT, and the problem of the threshold voltage Vth drift of the driving transistor DT caused by the process and the long-time operation is solved, so that the display nonuniformity of the panel is improved.
According to the pixel circuit provided by the embodiment of the invention, the grid voltage and the first electrode voltage of the driving transistor DT are fixed values at the end of the reset stage, so that the grid-source voltage of the driving transistor DT is fixed value at the reset stage of each frame, and the problem of image sticking is solved.
The operation of the pixel circuit provided by the embodiments of the present invention is described below with reference to a circuit timing diagram by several specific embodiments. In the following description, 1 denotes a high potential, and 0 denotes a low potential. It should be noted that 1 and 0 are logic potentials, which are only used to better explain the specific operation of the embodiment of the present invention, and not specific voltage values.
Examples one,
In the pixel circuit provided by the embodiment of the present invention, as shown in fig. 3, the gate of the first switching transistor M1 is connected to the reset control terminal Comp, and the gate of the fifth switching transistor M5 is connected to the second emission control terminal EM 2; the driving transistor DT, the first switching transistor M1, the second switching transistor M2, and the third switching transistor M3 are P-type transistors, and the fourth switching transistor M4 and the fifth switching transistor M5 are N-type transistors. The corresponding input timing is shown in fig. 12.
In the T1 phase (reset phase), Gate2 ═ 1, Comp ═ 0, EM1 ═ 0, and EM2 ═ 1. The first, third, and fifth switching transistors M1, M3, and M5 are turned on, and the second and fourth switching transistors M2 and M4 are turned off. The voltage at the first node N1 is Vint, and the voltage at the second node N2 is Vint-Vth.
In the T2 phase (data writing phase), Gate2 is 0, Comp is 0, EM1 is 0, and EM2 is 0. The first, second, and third switching transistors M1, M2, and M3 are turned on, and the fourth and fifth switching transistors M4 and M5 are turned off. The voltage of the first node N1 is Vdata + Vth, and the voltage of the second node N2 is Vdata.
In the T3 stage (light emitting stage), Gate2 is 1, Comp is 1, EM1 is 1, and EM2 is 1. The fourth switching transistor M4 and the fifth switching transistor M5 are turned on, and the first switching transistor M1, the second switching transistor M2 and the third switching transistor M3 are turned off. The voltage of the first node N1 is Vdata + Vth, the voltage of the second node N2 is VDD, and the light emitting diode oled emits light.
Examples two,
In the pixel circuit provided by the embodiment of the present invention, as shown in fig. 4, the gate of the first switching transistor M1 is connected to the reset control terminal Comp, and the gate of the fifth switching transistor M5 is connected to the second emission control terminal EM 2; the driving transistor DT, the second switching transistor M2, the fourth switching transistor M4, and the fifth switching transistor M5 are P-type transistors, and the first switching transistor M1 and the third switching transistor M3 are N-type transistors. The corresponding input timing is shown in fig. 13.
In the T1 phase (reset phase), Gate2 ═ 1, Comp ═ 1, EM1 ═ 1, and EM2 ═ 0. The first, third, and fifth switching transistors M1, M3, and M5 are turned on, and the second and fourth switching transistors M2 and M4 are turned off. The voltage at the first node N1 is Vint, and the voltage at the second node N2 is Vint-Vth.
In the T2 phase (data writing phase), Gate2 is 0, Comp is 1, EM1 is 1, and EM2 is 1. The first, second, and third switching transistors M1, M2, and M3 are turned on, and the fourth and fifth switching transistors M4 and M5 are turned off. The voltage of the first node N1 is Vdata + Vth, and the voltage of the second node N2 is Vdata.
In the T3 stage (light emitting stage), Gate2 ═ 1, Comp ═ 0, EM1 ═ 0, and EM2 ═ 0. The fourth switching transistor M4 and the fifth switching transistor M5 are turned on, and the first switching transistor M1, the second switching transistor M2 and the third switching transistor M3 are turned off. The voltage of the first node N1 is Vdata + Vth, the voltage of the second node N2 is VDD, and the light emitting diode oled emits light.
Examples III,
In the pixel circuit provided by the embodiment of the present invention, as shown in fig. 5, the Gate of the first switching transistor M1 is connected to the reset control terminal Comp, and the Gate of the fifth switching transistor M5 is connected to the second scan signal terminal Gate 2;
the driving transistor DT, the second switching transistor M2, and the fourth switching transistor M4 are P-type transistors, and the first switching transistor M1, the third switching transistor M3, and the fifth switching transistor M5 are N-type transistors. The corresponding input timing is shown in fig. 14.
In the T1 phase (reset phase), Gate2 ═ 1, Comp ═ 1, and EM1 ═ 1. The first, third, and fifth switching transistors M1, M3, and M5 are turned on, and the second and fourth switching transistors M2 and M4 are turned off. The voltage at the first node N1 is Vint, and the voltage at the second node N2 is Vint-Vth.
In the T2 stage (data writing stage), Gate2 is 0, Comp is 1, and EM1 is 1. The first, second, and third switching transistors M1, M2, and M3 are turned on, and the fourth and fifth switching transistors M4 and M5 are turned off. The voltage of the first node N1 is Vdata + Vth, and the voltage of the second node N2 is Vdata.
In the T3 stage (light emitting stage), Gate2 ═ 1, Comp ═ 0, and EM1 ═ 0. The fourth switching transistor M4 and the fifth switching transistor M5 are turned on, and the first switching transistor M1, the second switching transistor M2 and the third switching transistor M3 are turned off. The voltage of the first node N1 is Vdata + Vth, the voltage of the second node N2 is VDD, and the light emitting diode oled emits light.
Example four,
In the pixel circuit provided by the embodiment of the present invention, as shown in fig. 6, the gate of the first switching transistor M1 is connected to the reset control terminal Comp, and the gate of the fifth switching transistor M5 is connected to the second scan signal terminal;
the driving transistor DT, the fourth switching transistor M4, and the fifth switching transistor M5 are P-type transistors, and the first switching transistor M1, the second switching transistor M2, and the third switching transistor M3 are N-type transistors. The corresponding input timing is shown in fig. 15.
In the T1 phase (reset phase), Gate2 ═ 0, Comp ═ 1, and EM1 ═ 1. The first, third, and fifth switching transistors M1, M3, and M5 are turned on, and the second and fourth switching transistors M2 and M4 are turned off. The voltage at the first node N1 is Vint, and the voltage at the second node N2 is Vint-Vth.
In the T2 stage (data writing stage), Gate2 ═ 1, Comp ═ 1, and EM1 ═ 1. The first, second, and third switching transistors M1, M2, and M3 are turned on, and the fourth and fifth switching transistors M4 and M5 are turned off. The voltage of the first node N1 is Vdata + Vth, and the voltage of the second node N2 is Vdata.
In the T3 stage (light emitting stage), Gate2 ═ 0, Comp ═ 0, and EM1 ═ 0. The fourth switching transistor M4 and the fifth switching transistor M5 are turned on, and the first switching transistor M1, the second switching transistor M2 and the third switching transistor M3 are turned off. The voltage of the first node N1 is Vdata + Vth, the voltage of the second node N2 is VDD, and the light emitting diode oled emits light.
Examples five,
In the pixel circuit provided by the embodiment of the invention, as shown in fig. 7, the Gate of the first switching transistor M1 is connected to the first scan signal terminal Gate1, and the Gate of the fifth switching transistor M5 is connected to the second emission control signal terminal EM 2;
the driving transistor DT, the first switching transistor M1, the second switching transistor M2, the fourth switching transistor M4, and the fifth switching transistor M5 are P-type transistors, and the third switching transistor M3 is an N-type transistor; the corresponding input timing is shown in fig. 16.
In the T1 phase (reset phase), Gate1 is 0, Gate2 is 1, Comp is 1, EM1 is 1, and EM2 is 0. The first, third, and fifth switching transistors M1, M3, and M5 are turned on, and the second and fourth switching transistors M2 and M4 are turned off. The voltage at the first node N1 is Vint, and the voltage at the second node N2 is Vint-Vth.
In the T2 phase (data writing phase), Gate1 is 1, Gate2 is 0, Comp is 1, EM1 is 1, and EM2 is 1. The second switching transistor M2 and the third switching transistor M3 are turned on, and the first switching transistor M1, the fourth switching transistor M4 and the fifth switching transistor M5 are turned off. The voltage of the first node N1 is Vdata + Vth, and the voltage of the second node N2 is Vdata.
In the T3 stage (light emitting stage), Gate1 is 1, Gate2 is 1, Comp is 0, EM1 is 0, and EM2 is 0. The fourth switching transistor M4 and the fifth switching transistor M5 are turned on, and the first switching transistor M1, the second switching transistor M2 and the third switching transistor M3 are turned off. The voltage of the first node N1 is Vdata + Vth, the voltage of the second node N2 is VDD, and the light emitting diode oled emits light.
Examples six,
In the pixel circuit provided by the embodiment of the invention, as shown in fig. 8, the Gate of the first switching transistor M1 is connected to the first scan signal terminal Gate1, and the Gate of the fifth switching transistor M5 is connected to the second emission control signal terminal EM 2;
the driving transistor DT and the third switching transistor M3 are P-type transistors, and the first switching transistor M1, the second switching transistor M2, the fourth switching transistor M4, and the fifth switching transistor M5 are N-type transistors. The corresponding input timing is shown in fig. 17.
In the T1 phase (reset phase), Gate1 is 1, Gate2 is 0, Comp is 0, EM1 is 0, and EM2 is 1. The first, third, and fifth switching transistors M1, M3, and M5 are turned on, and the second and fourth switching transistors M2 and M4 are turned off. The voltage at the first node N1 is Vint, and the voltage at the second node N2 is Vint-Vth.
In the T2 phase (data writing phase), Gate1 is 0, Gate2 is 1, Comp is 0, EM1 is 0, and EM2 is 0. The second switching transistor M2 and the third switching transistor M3 are turned on, and the first switching transistor M1, the fourth switching transistor M4 and the fifth switching transistor M5 are turned off. The voltage of the first node N1 is Vdata + Vth, and the voltage of the second node N2 is Vdata.
In the T3 stage (light emitting stage), Gate1 is 0, Gate2 is 0, Comp is 1, EM1 is 1, and EM2 is 1. The fourth switching transistor M4 and the fifth switching transistor M5 are turned on, and the first switching transistor M1, the second switching transistor M2 and the third switching transistor M3 are turned off. The voltage of the first node N1 is Vdata + Vth, the voltage of the second node N2 is VDD, and the light emitting diode oled emits light.
Alternatively, in the pixel circuit provided in the embodiment of the present invention, as shown in fig. 9 to 11, the reset control terminal Comp is the same as the first light-emitting control terminal EM 1. That is, the first lighting control terminal EM1 is used instead of the reset control terminal Comp, so that the wiring can be reduced by reducing one signal terminal. Specifically, fig. 9 shows the input timing, fig. 10 shows the input timing, fig. 19 shows the input timing, and fig. 11 shows the input timing, fig. 20 shows the input timing.
However, in consideration of the signal delay, as shown in fig. 3 to 11, the reset control terminal Comp is provided separately from the first emission control terminal EM1, so that as shown in fig. 12 to 17, the reset control terminal Comp changes after the potential of the first emission control terminal EM1 changes at the stage of T1, and changes before the potential of the first emission control terminal EM1 changes at the stage of T1, so that the output abnormality due to the signal delay can be avoided.
Specifically, in the pixel circuit provided by the embodiment of the invention, the N-type transistor is turned on under the action of a high potential signal and is turned off under the action of a low potential signal; the P-type transistor is turned on under the action of a low potential signal and turned off under the action of a high potential signal.
Specifically, in the pixel circuit provided by the embodiment of the present invention, the first pole of the transistor may be a source and the second pole thereof is a drain, or the first pole of the transistor may be a drain and the second pole thereof is a source, which are not specifically distinguished herein.
Specifically, in the pixel circuit provided in the embodiment of the present invention, any switching transistor may be configured to have a double gate structure from the viewpoint of reducing leakage current, which is not limited herein.
In specific implementation, in the display panel provided in the embodiment of the present invention, the driving transistor is a P-type transistor, and for the case that the driving transistor is an N-type transistor, the design principle is the same as that of the present invention, and also falls within the protection scope of the present invention.
In a specific implementation, the driving transistor and the switching transistor may be Thin Film Transistors (TFTs) or Metal Oxide Semiconductor field effect transistors (MOS), and are not limited herein. In specific implementations, the first and second poles of these transistors may be interchanged in function, depending on the type of transistor and the input signal, and are not specifically distinguished herein.
Based on the same inventive concept, embodiments of the present invention further provide a driving method for the pixel circuit, and since the principle of the driving method for solving the problem is similar to that of the pixel circuit, the implementation of the driving method can refer to the implementation of the method, and repeated details are not repeated.
Specifically, the driving method of a pixel circuit provided in the embodiment of the present invention, as shown in fig. 21, includes:
s2101, in a reset stage, the anode reset module resets the anode of the light-emitting diode, the second light-emitting control module controls the anode of the light-emitting diode to be conducted with the second pole of the driving transistor, and the threshold compensation module controls the grid of the driving transistor to be conducted with the first pole of the driving transistor;
s2102, in a writing stage, the data writing module writes a data signal into the first pole of the driving transistor, and the threshold compensation module controls the grid electrode of the driving transistor to be conducted with the first pole of the driving transistor;
s2103, in the light emitting phase, the first light emitting control module provides a power voltage to the first electrode of the driving transistor, the second light emitting control module controls the conduction between the anode of the light emitting diode and the second electrode of the driving transistor, the driving transistor controls the light emitting diode to emit light, and the capacitor module keeps the gate voltage of the driving transistor stable.
Based on the same inventive concept, embodiments of the present invention further provide a display device, including any one of the pixel circuits provided in embodiments of the present invention. The display device can be a mobile phone, and can also be any product or part with a display function, such as a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Since the principle of the display device to solve the problem is similar to the pixel circuit, the implementation of the display device can be referred to the implementation of the pixel circuit, and repeated descriptions are omitted.
The pixel circuit, the driving method thereof and the display device provided by the embodiment of the invention comprise: the device comprises a data writing module, a first light emitting control module, a second light emitting control module, a threshold compensation module, an anode resetting module, a capacitor module, a driving transistor and a light emitting diode; in the resetting stage, the anode of the light-emitting diode is reset by using the anode resetting module, meanwhile, the second light-emitting control module controls the conduction of the anode of the light-emitting diode and the second pole of the driving transistor, and the threshold compensation module controls the conduction of the grid of the driving transistor and the first pole of the driving transistor; thereby discharging the voltage of the first electrode of the driving transistor towards the anode reset module until the driving transistor is in a cut-off state, thereby ensuring that the gate-source voltage Vgs of the driving transistor is a constant value and is not influenced by the last signal/picture, and solving the problem of image retention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A pixel circuit, comprising: the device comprises a data writing module, a first light emitting control module, a second light emitting control module, a threshold compensation module, an anode resetting module, a capacitor module, a driving transistor and a light emitting diode; wherein,
the anode reset module is used for resetting the anode of the light-emitting diode in a reset stage;
the data writing module is used for writing a data signal into the first pole of the driving transistor in a data writing stage;
the threshold compensation module is used for controlling the grid electrode of the driving transistor to be conducted with the second pole of the driving transistor in the reset phase and the data writing phase;
the first light-emitting control module is used for providing power supply voltage to the first electrode of the driving transistor in a light-emitting stage;
the second light-emitting control module is used for controlling the conduction of the anode of the light-emitting diode and the second electrode of the driving transistor in the reset phase and the light-emitting phase;
the driving transistor is used for driving the light emitting diode to emit light in the light emitting stage;
the capacitance module is used for keeping the grid voltage of the driving transistor stable when the grid of the driving transistor is in floating connection.
2. The pixel circuit of claim 1, wherein the anode reset module comprises a first switching transistor; wherein,
the grid electrode of the first switch transistor is connected with the reset control end or the first scanning signal end, the first pole of the first switch transistor is connected with the initialization signal end, and the second pole of the first switch transistor is connected with the anode of the light-emitting diode.
3. The pixel circuit according to claim 2, wherein the data writing module comprises a second switching transistor, the threshold compensation module comprises a third switching transistor, and the capacitance module comprises a capacitance; wherein,
the grid electrode of the second switch transistor is connected with a second scanning signal end, the first pole of the second switch transistor is connected with the first pole of the driving transistor, and the second pole of the second switch transistor is connected with a data signal end;
the grid electrode of the third switching transistor is connected with the reset control end, the first pole of the third switching transistor is connected with the grid electrode of the driving transistor, and the second pole of the third switching transistor is connected with the second pole of the driving transistor;
one end of the capacitor is connected with a first power supply voltage end, and the other end of the capacitor is connected with the grid electrode of the driving transistor.
4. The pixel circuit according to claim 3, wherein the first light emission control module comprises a fourth switching transistor, the second light emission control module comprises a fifth switching transistor;
the grid electrode of the fourth switching transistor is connected with the first light-emitting control end, the first electrode of the fourth switching transistor is connected with the first power supply voltage end, and the second electrode of the fourth switching transistor is connected with the first electrode of the driving transistor;
the grid electrode of the fifth switching transistor is connected with the second light-emitting control end or the second scanning signal end, the first pole of the fifth switching transistor is connected with the second pole of the driving transistor, and the second pole of the fifth switching transistor is connected with the anode of the light-emitting diode.
5. The pixel circuit according to claim 4, wherein a gate of the first switching transistor is connected to the reset control terminal, and a gate of the fifth switching transistor is connected to the second light emission control terminal;
the driving transistor, the first switching transistor, the second switching transistor and the third switching transistor are P-type transistors, and the fourth switching transistor and the fifth switching transistor are N-type transistors; or,
the driving transistor, the second switching transistor, the fourth switching transistor and the fifth switching transistor are P-type transistors, and the first switching transistor and the third switching transistor are N-type transistors.
6. The pixel circuit according to claim 4, wherein a gate of the first switching transistor is connected to the reset control terminal, and a gate of the fifth switching transistor is connected to the second scan signal terminal;
the driving transistor, the second switching transistor and the fourth switching transistor are P-type transistors, and the first switching transistor, the third switching transistor and the fifth switching transistor are N-type transistors; or,
the driving transistor, the fourth switching transistor and the fifth switching transistor are P-type transistors, and the first switching transistor, the second switching transistor and the third switching transistor are N-type transistors.
7. The pixel circuit according to claim 4, wherein a gate of the first switching transistor is connected to the first scan signal terminal, and a gate of the fifth switching transistor is connected to the second light emission control signal terminal;
the driving transistor, the first switching transistor, the second switching transistor, the fourth switching transistor and the fifth switching transistor are P-type transistors, and the third switching transistor is an N-type transistor; or,
the driving transistor and the third switching transistor are P-type transistors, and the first switching transistor, the second switching transistor, the fourth switching transistor and the fifth switching transistor are N-type transistors.
8. The pixel circuit according to any of claims 5 to 7, wherein the reset control terminal is the same terminal as the first light emission control terminal.
9. A display device comprising the pixel circuit according to any one of claims 1 to 8.
10. A method of driving a pixel circuit according to any one of claims 1 to 8, comprising:
in a reset stage, the anode reset module resets the anode of the light emitting diode, the second light emitting control module controls the anode of the light emitting diode to be conducted with the second pole of the driving transistor, and the threshold compensation module controls the gate of the driving transistor to be conducted with the first pole of the driving transistor;
in a writing stage, the data writing module writes a data signal into the first pole of the driving transistor, and the threshold compensation module controls the grid electrode of the driving transistor to be conducted with the first pole of the driving transistor;
in a light emitting stage, the first light emitting control module provides a power voltage to a first pole of the driving transistor, the second light emitting control module controls the conduction of an anode of the light emitting diode and a second pole of the driving transistor, the driving transistor controls the light emitting diode to emit light, and the capacitor module keeps the grid voltage of the driving transistor stable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810007456.9A CN107945743A (en) | 2018-01-04 | 2018-01-04 | A kind of image element circuit, its driving method and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810007456.9A CN107945743A (en) | 2018-01-04 | 2018-01-04 | A kind of image element circuit, its driving method and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107945743A true CN107945743A (en) | 2018-04-20 |
Family
ID=61938340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810007456.9A Pending CN107945743A (en) | 2018-01-04 | 2018-01-04 | A kind of image element circuit, its driving method and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107945743A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108766361A (en) * | 2018-05-31 | 2018-11-06 | 京东方科技集团股份有限公司 | Pixel circuit and its driving method, display device |
| CN109147673A (en) * | 2018-09-19 | 2019-01-04 | 京东方科技集团股份有限公司 | Pixel circuit and its driving method, display device |
| CN109166528A (en) * | 2018-09-28 | 2019-01-08 | 昆山国显光电有限公司 | Pixel circuit and its driving method |
| CN109448637A (en) * | 2019-01-04 | 2019-03-08 | 京东方科技集团股份有限公司 | A kind of pixel-driving circuit and its driving method, display panel |
| CN110033734A (en) * | 2019-04-25 | 2019-07-19 | 京东方科技集团股份有限公司 | A kind of display driver circuit and its driving method, display device |
| CN110176213A (en) * | 2018-06-08 | 2019-08-27 | 京东方科技集团股份有限公司 | Pixel circuit and its driving method, display panel |
| CN111341251A (en) * | 2019-05-17 | 2020-06-26 | 友达光电股份有限公司 | Pixel circuit |
| CN112102785A (en) * | 2020-10-15 | 2020-12-18 | 厦门天马微电子有限公司 | Pixel circuit, display panel, driving method of display panel and display device |
| WO2021062785A1 (en) * | 2019-09-30 | 2021-04-08 | 重庆康佳光电技术研究院有限公司 | Sub-pixel circuit, active electroluminescence display, and drive method thereof |
| CN112735314A (en) * | 2020-12-30 | 2021-04-30 | 合肥维信诺科技有限公司 | Pixel circuit, driving method thereof, display panel and display device |
| CN112863448A (en) * | 2021-01-11 | 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 |
| CN114067720A (en) * | 2021-12-03 | 2022-02-18 | 武汉华星光电半导体显示技术有限公司 | Pixel circuit and display device |
| US11257437B2 (en) | 2020-04-09 | 2022-02-22 | Samsung Display Co., Ltd. | Light-emitting display device and pixel thereof |
| CN114758619A (en) * | 2018-08-30 | 2022-07-15 | 京东方科技集团股份有限公司 | Pixel circuit, driving method thereof, display panel and display device |
| WO2023201817A1 (en) * | 2022-04-18 | 2023-10-26 | 深圳市华星光电半导体显示技术有限公司 | Pixel compensation circuit, display panel, and pixel compensation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106531076A (en) * | 2017-01-12 | 2017-03-22 | 京东方科技集团股份有限公司 | Pixel circuit, display panel and driving method thereof |
| KR20170132598A (en) * | 2016-05-24 | 2017-12-04 | 엘지전자 주식회사 | Pixel circuit comprising organic light emitting diode and display device comprising the pixel circuit |
| CN107452339A (en) * | 2017-07-31 | 2017-12-08 | 上海天马有机发光显示技术有限公司 | Image element circuit, its driving method, organic electroluminescence display panel and display device |
-
2018
- 2018-01-04 CN CN201810007456.9A patent/CN107945743A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170132598A (en) * | 2016-05-24 | 2017-12-04 | 엘지전자 주식회사 | Pixel circuit comprising organic light emitting diode and display device comprising the pixel circuit |
| CN106531076A (en) * | 2017-01-12 | 2017-03-22 | 京东方科技集团股份有限公司 | Pixel circuit, display panel and driving method thereof |
| CN107452339A (en) * | 2017-07-31 | 2017-12-08 | 上海天马有机发光显示技术有限公司 | Image element circuit, its driving method, organic electroluminescence display panel and display device |
Cited By (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108766361A (en) * | 2018-05-31 | 2018-11-06 | 京东方科技集团股份有限公司 | Pixel circuit and its driving method, display device |
| CN110176213B (en) * | 2018-06-08 | 2023-09-26 | 京东方科技集团股份有限公司 | Pixel circuit, driving method thereof and display panel |
| CN110176213A (en) * | 2018-06-08 | 2019-08-27 | 京东方科技集团股份有限公司 | Pixel circuit and its driving method, display panel |
| US11373582B2 (en) | 2018-06-08 | 2022-06-28 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Pixel circuit and driving method thereof, display panel |
| US11631369B2 (en) | 2018-06-08 | 2023-04-18 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Pixel circuit and driving method thereof, display panel |
| WO2019233120A1 (en) * | 2018-06-08 | 2019-12-12 | 京东方科技集团股份有限公司 | Pixel circuit and driving method therefor, and display panel |
| US11837162B2 (en) | 2018-06-08 | 2023-12-05 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Pixel circuit and driving method thereof, display panel |
| CN114758619A (en) * | 2018-08-30 | 2022-07-15 | 京东方科技集团股份有限公司 | Pixel circuit, driving method thereof, display panel and display device |
| CN109147673A (en) * | 2018-09-19 | 2019-01-04 | 京东方科技集团股份有限公司 | Pixel circuit and its driving method, display device |
| CN109166528B (en) * | 2018-09-28 | 2020-05-19 | 昆山国显光电有限公司 | Pixel circuit and driving method thereof |
| CN109166528A (en) * | 2018-09-28 | 2019-01-08 | 昆山国显光电有限公司 | Pixel circuit and its driving method |
| US11217175B2 (en) | 2019-01-04 | 2022-01-04 | Boe Technology Group Co., Ltd. | Pixel-driving circuit and method, and a display utilizing the same |
| WO2020140694A1 (en) * | 2019-01-04 | 2020-07-09 | Boe Technology Group Co., Ltd. | Pixel-driving circuit and method, and a display utilizing the same |
| CN109448637A (en) * | 2019-01-04 | 2019-03-08 | 京东方科技集团股份有限公司 | A kind of pixel-driving circuit and its driving method, display panel |
| WO2020215890A1 (en) * | 2019-04-25 | 2020-10-29 | 京东方科技集团股份有限公司 | Display driving circuit and driving method therefor, and display device |
| CN110033734A (en) * | 2019-04-25 | 2019-07-19 | 京东方科技集团股份有限公司 | A kind of display driver circuit and its driving method, display device |
| CN110033734B (en) * | 2019-04-25 | 2021-08-10 | 京东方科技集团股份有限公司 | Display driving circuit, driving method thereof and display device |
| CN111341251A (en) * | 2019-05-17 | 2020-06-26 | 友达光电股份有限公司 | Pixel circuit |
| CN111341251B (en) * | 2019-05-17 | 2021-06-01 | 友达光电股份有限公司 | Pixel circuit |
| WO2021062785A1 (en) * | 2019-09-30 | 2021-04-08 | 重庆康佳光电技术研究院有限公司 | Sub-pixel circuit, active electroluminescence display, and drive method thereof |
| US11682340B2 (en) | 2019-09-30 | 2023-06-20 | Chongqing Konka Photoelectric Technology Research Institute Co., Ltd. | Sub-pixel circuit, and active electroluminescence display and driving method thereof |
| US11645980B2 (en) | 2020-04-09 | 2023-05-09 | Samsung Display Co., Ltd. | Light-emitting display device and pixel thereof |
| US11257437B2 (en) | 2020-04-09 | 2022-02-22 | Samsung Display Co., Ltd. | Light-emitting display device and pixel thereof |
| CN112102785A (en) * | 2020-10-15 | 2020-12-18 | 厦门天马微电子有限公司 | Pixel circuit, display panel, driving method of display panel and display device |
| CN112102785B (en) * | 2020-10-15 | 2024-04-16 | 厦门天马微电子有限公司 | Pixel circuit, display panel, driving method of display panel and display device |
| KR20230017283A (en) * | 2020-12-30 | 2023-02-03 | 허페이 비젼녹스 테크놀로지 컴퍼니 리미티드 | Pixel circuit and its display panel |
| CN112735314A (en) * | 2020-12-30 | 2021-04-30 | 合肥维信诺科技有限公司 | Pixel circuit, driving method thereof, display panel and display device |
| CN112735314B (en) * | 2020-12-30 | 2023-01-13 | 合肥维信诺科技有限公司 | Pixel circuit, driving method thereof, display panel and display device |
| WO2022142559A1 (en) * | 2020-12-30 | 2022-07-07 | 合肥维信诺科技有限公司 | Pixel circuit and display panel thereof |
| US11869402B2 (en) | 2020-12-30 | 2024-01-09 | Hefei Visionox Technology Co., Ltd. | Pixel circuit and display panel thereof |
| KR102706184B1 (en) * | 2020-12-30 | 2024-09-13 | 허페이 비젼녹스 테크놀로지 컴퍼니 리미티드 | Pixel circuit and display panel thereof |
| CN112863448A (en) * | 2021-01-11 | 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 |
| CN114067720A (en) * | 2021-12-03 | 2022-02-18 | 武汉华星光电半导体显示技术有限公司 | Pixel circuit and display device |
| WO2023201817A1 (en) * | 2022-04-18 | 2023-10-26 | 深圳市华星光电半导体显示技术有限公司 | Pixel compensation circuit, display panel, and pixel compensation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107610652B (en) | Pixel circuit, its driving method, display panel and display device | |
| CN113838421B (en) | Pixel circuit, driving method thereof and display panel | |
| CN107945743A (en) | A kind of image element circuit, its driving method and display device | |
| US11881164B2 (en) | Pixel circuit and driving method thereof, and display panel | |
| CN107358917B (en) | Pixel circuit, driving method thereof, display panel and display device | |
| CN107358915B (en) | Pixel circuit, driving method thereof, display panel and display device | |
| CN106910468B (en) | The driving method of display panel, display device and pixel circuit | |
| US11620942B2 (en) | Pixel circuit, driving method thereof and display device | |
| CN107316613B (en) | Pixel circuit, its driving method, organic light emitting display panel and display device | |
| CN104318897B (en) | A kind of image element circuit, organic EL display panel and display device | |
| CN107452338B (en) | A kind of pixel circuit, its driving method, display panel and display device | |
| CN109712565B (en) | Pixel circuit, driving method thereof and electroluminescent display panel | |
| CN106205491B (en) | A kind of pixel circuit, its driving method and relevant apparatus | |
| CN105427800B (en) | Pixel circuit, driving method, organic EL display panel and display device | |
| CN109493794B (en) | Pixel circuit, pixel driving method and display device | |
| CN110021273B (en) | Pixel circuit, driving method thereof and display panel | |
| CN104269133B (en) | A kind of image element circuit and organic EL display panel | |
| CN109887464B (en) | Pixel circuit, driving method thereof, display panel and display device | |
| US10515590B2 (en) | Pixel compensation circuit, driving method, display panel and display device | |
| CN108428434B (en) | Pixel circuit, organic light-emitting display panel and display device | |
| CN105185305A (en) | Pixel circuit, driving method thereof and related device | |
| CN104809989A (en) | Pixel circuit, drive method thereof and related device | |
| CN105161051A (en) | Pixel circuit and driving method therefor, array substrate, display panel and display device | |
| CN104751804A (en) | Pixel circuit, driving method thereof and relevant device | |
| CN106960656B (en) | A kind of organic light emitting display panel and its display methods |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180420 |
|
| RJ01 | Rejection of invention patent application after publication |