CN111696485B - Pixel circuit, display module, dimming method and display device - Google Patents
Pixel circuit, display module, dimming method and display device Download PDFInfo
- Publication number
- CN111696485B CN111696485B CN202010663604.XA CN202010663604A CN111696485B CN 111696485 B CN111696485 B CN 111696485B CN 202010663604 A CN202010663604 A CN 202010663604A CN 111696485 B CN111696485 B CN 111696485B
- Authority
- CN
- China
- Prior art keywords
- dimming
- control
- light
- circuit
- electrically connected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
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]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
Abstract
The invention provides a pixel circuit, a display module, a dimming method and a display device. The pixel circuit comprises a pixel driving circuit, a first light-emitting element and a dimming circuit; the pixel driving circuit generates a driving current for driving the first light-emitting element to emit light according to the power voltage and the data voltage under the control of the gate driving signal and the light-emitting control signal; the dimming circuit is electrically connected with the second pole of the first light-emitting element; the dimming circuit comprises N dimming light-emitting elements and a dimming sub-circuit; n is a positive integer; the dimming sub-circuit is used for controlling whether the pixel driving circuit drives the dimming light-emitting element to emit light or not under the control of the dimming control signal. The invention can control the power supply voltage to change in a small range, can realize full-brightness DC (direct current) dimming without regulating the power supply voltage to low voltage, and solves the problems of wiping cloth screen, color deviation, smear and the like under low brightness of the DC dimming.
Description
Technical Field
The invention relates to the technical field of display, in particular to a pixel circuit, a display module, a dimming method and a display device.
Background
When an existing AMOLED (active matrix organic light emitting diode) display screen works, when PWM (pulse width modulation) dimming is adopted, the PWM dimming mode is a technology for adjusting brightness through rapid flicker, even if human eyes cannot sense picture change in a switching process, people can react to the phenomenon in the brain, frequent flicker easily causes fatigue to muscles on two sides of eyes, and therefore a light bending system is stimulated to link, and aging of eyesight is accelerated. The conventional DC (direct current) dimming method adopted by the AMOLED display screen needs to control the variation range of the power supply voltage to be large, and when the AMOLED display screen displays low brightness, problems such as a wiping screen, color deviation, and smearing can occur.
Disclosure of Invention
The invention mainly aims to provide a pixel circuit, a display module, a dimming method and a display device, which solve the problems that the prior art cannot eliminate the wiping screen, color deviation and smear of DC dimming under low brightness on the premise of realizing full-brightness DC dimming.
In order to achieve the above object, the present invention provides a pixel circuit applied to a display panel, the pixel circuit including a pixel driving circuit, a first light emitting element, and a dimming circuit, wherein,
the pixel driving circuit is respectively electrically connected with a data line, a light-emitting control line, a grid line, a power voltage end and a first electrode of a first light-emitting element, and is used for generating a driving current for driving the first light-emitting element to emit light according to a power voltage provided by the power voltage end and a data voltage on the data line under the control of a grid driving signal provided by the grid line and a light-emitting control signal provided by the light-emitting control line;
the dimming circuit is electrically connected with the second pole of the first light-emitting element;
the dimming circuit comprises N dimming light-emitting elements and a dimming sub-circuit; n is a positive integer;
the dimming sub-circuit is used for controlling the pixel driving circuit to drive the dimming light-emitting element to emit light or not under the control of a dimming control signal.
Optionally, N is equal to 1;
the dimming circuit comprises a first dimming light emitting element and a dimming sub-circuit, the dimming sub-circuit comprising a first dimming switching transistor; the dimming control signal comprises a first dimming control signal;
a first electrode of the first dimming light-emitting element is electrically connected with a second electrode of the first light-emitting element, and the second electrode of the first dimming light-emitting element is electrically connected with a first voltage end;
the control electrode of the first dimming switch transistor is electrically connected with a first dimming control signal end, the first electrode of the first dimming switch transistor is electrically connected with the first electrode of the first dimming light-emitting element, and the second electrode of the first dimming switch transistor is electrically connected with a second voltage end.
Optionally, N is equal to 2;
the dimming circuit comprises a first dimming light-emitting element, a second dimming light-emitting element and a dimming sub-circuit, wherein the dimming sub-circuit comprises a first dimming switching transistor and a second dimming switching transistor; the dimming control signal comprises a first dimming control signal and a second dimming control signal;
a first pole of the first dimming light emitting element is electrically connected to a second pole of the first light emitting element, and the second pole of the first dimming light emitting element is electrically connected to the first pole of the second dimming light emitting element; the second pole of the second dimming light-emitting element is electrically connected with the first voltage end;
a control electrode of the first dimming switching transistor is electrically connected with a first dimming control signal end, a first electrode of the first dimming switching transistor is electrically connected with a first electrode of the first dimming light-emitting element, and a second electrode of the first dimming switching transistor is electrically connected with a second voltage end;
the control electrode of the second dimming switch transistor is electrically connected with the second dimming control signal end, the first electrode of the second dimming switch transistor is electrically connected with the first electrode of the second dimming light-emitting element, and the second electrode of the second dimming switch transistor is electrically connected with the second voltage end.
Optionally, the pixel driving circuit includes a driving circuit, a data writing circuit, a first light-emitting control circuit, a second light-emitting control circuit, a compensation control circuit, and an energy storage circuit;
the data writing circuit is respectively electrically connected with the grid line, the data line and the first end of the driving circuit and is used for controlling the data voltage on the data line to be supplied to the first end of the driving circuit under the control of a grid driving signal supplied by the grid line;
the first light-emitting control circuit is respectively electrically connected with a light-emitting control line, a power supply voltage end and the first end of the driving circuit and is used for controlling the communication between the power supply voltage end and the first end of the driving circuit under the control of a light-emitting control signal provided by the light-emitting control line;
the second light-emitting control circuit is respectively electrically connected with a light-emitting control line, a second end of the driving circuit and the first pole of the first light-emitting element, and is used for controlling the communication between the second end of the driving circuit and the first pole of the first light-emitting element under the control of a light-emitting control signal provided by the light-emitting control line;
the compensation control circuit is respectively electrically connected with the grid line, the control end of the drive circuit and the second end of the drive circuit and is used for controlling the communication between the control end of the drive circuit and the second end of the drive circuit under the control of the grid drive signal;
the energy storage circuit is electrically connected with the control end of the driving circuit and used for storing electric energy;
the drive circuit is used for generating the drive current under the control of the potential of the control end of the drive circuit.
Optionally, the pixel driving circuit further includes a reset circuit;
the reset circuit is respectively electrically connected with the reset end, the initial voltage end and the control end of the drive circuit and is used for controlling the initial voltage end to be communicated with the control end of the drive circuit under the control of a reset control signal provided by the reset end.
Optionally, the driving circuit includes a driving transistor, the data writing circuit includes a data writing transistor, the first light emission control circuit includes a first light emission control transistor, the second light emission control circuit includes a second light emission control transistor, the compensation control circuit includes a compensation control transistor, and the energy storage circuit includes a storage capacitor;
the control electrode of the driving transistor is electrically connected with the control end of the driving circuit, the first electrode of the driving transistor is electrically connected with the first end of the driving circuit, and the second electrode of the driving transistor is electrically connected with the second end of the driving circuit;
a control electrode of the data writing transistor is electrically connected with the grid line, a first electrode of the data writing transistor is electrically connected with the data line, and a second electrode of the data writing transistor is electrically connected with the first electrode of the driving transistor;
a control electrode of the first light-emitting control transistor is electrically connected to the light-emitting control line, a first electrode of the first light-emitting control transistor is electrically connected to the power supply voltage terminal, and a second electrode of the first light-emitting control transistor is electrically connected to the first electrode of the driving transistor;
a control electrode of the second light emission control transistor is electrically connected to the light emission control line, a first electrode of the second light emission control transistor is electrically connected to a second electrode of the driving transistor, and the second electrode of the second light emission control transistor is electrically connected to the first electrode of the first light emitting element;
a control electrode of the compensation control transistor is electrically connected with the grid line, a first electrode of the compensation control transistor is electrically connected with a control electrode of the driving transistor, and a second electrode of the compensation control transistor is electrically connected with a second electrode of the driving transistor;
the first end of the storage capacitor is electrically connected with the control electrode of the driving transistor, and the second end of the storage capacitor is electrically connected with the power supply voltage end.
Optionally, the reset circuit comprises a reset transistor;
the control electrode of the reset transistor is electrically connected with the reset end, the first electrode of the reset transistor is electrically connected with the control end of the driving circuit, and the second electrode of the reset transistor is electrically connected with the initial voltage end.
The invention also provides a display module, which comprises a display panel and a dimming control circuit, wherein the display panel comprises the pixel circuit and the dimming control circuit;
the dimming control circuit is used for controlling and adjusting the dimming control signal, the data voltage and the power supply voltage according to the expected brightness of the display panel.
The invention also provides a dimming method applied to the display module, and the dimming method comprises the following steps:
the dimming control circuit controls and adjusts the dimming control signal, the data voltage and the power voltage according to the desired brightness of the display panel.
Optionally, the dimming method includes:
when the expected brightness of the display panel is larger than or equal to a first preset expected brightness, the dimming control circuit controls to provide the dimming control signal so as to control the N dimming light-emitting elements to emit light in a light-emitting stage, and the dimming control circuit correspondingly adjusts the power supply voltage according to the expected brightness;
when the expected brightness of the display panel is greater than or equal to a second preset expected brightness and less than the first preset expected brightness, the dimming control circuit provides the dimming control signal according to the expected brightness so as to control at least one of the N dimming light-emitting elements not to emit light in a light-emitting stage, and the dimming control circuit correspondingly adjusts the power supply voltage according to the expected brightness;
when the expected brightness of the display panel is smaller than the second preset expected brightness, the dimming control circuit controls to provide the dimming control signal so as to control none of the N dimming light-emitting elements to emit light in a light-emitting stage, and the dimming control circuit correspondingly adjusts the data voltage and the power supply voltage according to the expected brightness; n is a positive integer.
The invention also provides a display device which comprises the display module.
The pixel circuit, the display module, the dimming method and the display device can control the power supply voltage to change within a small range, can realize full-brightness DC (direct current) dimming without regulating the power supply voltage to low voltage, and solve the problems of wiping cloth screen, color deviation, smear and the like under low brightness of the DC dimming.
Drawings
Fig. 1 is a structural diagram of a pixel circuit according to an embodiment of the present invention;
fig. 2 is a block diagram of a pixel circuit according to another embodiment of the present invention;
fig. 3 is a block diagram of a pixel circuit according to yet another embodiment of the present invention;
fig. 4 is a structural diagram of a pixel circuit according to still another embodiment of the present invention;
FIG. 5 is a circuit diagram of a first embodiment of a pixel circuit according to the present invention;
fig. 6 is a circuit diagram of a second embodiment of the pixel circuit according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 transistors used in all embodiments of the present invention may be transistors, thin film transistors, or field effect transistors or other devices with the same characteristics. In the embodiment of the present invention, in order to distinguish two poles of the transistor except the control pole, one pole is called a first pole, and the other pole is called a second pole.
In practical operation, when the transistor is a triode, the control electrode may be a base electrode, the first electrode may be a collector electrode, and the second electrode may be an emitter electrode; alternatively, the control electrode may be a base electrode, the first electrode may be an emitter electrode, and the second electrode may be a collector electrode.
In practical operation, when the transistor is a thin film transistor or a field effect transistor, the control electrode may be a gate electrode, the first electrode may be a drain electrode, and the second electrode may be a source electrode; alternatively, the control electrode may be a gate electrode, the first electrode may be a source electrode, and the second electrode may be a drain electrode.
The pixel circuit according to the embodiment of the present invention is applied to a display panel, and as shown in fig. 1, the pixel circuit includes a pixel driving circuit 11, a first light emitting element EL1, and a dimming circuit 12, wherein,
the pixel driving circuit 11 is electrically connected to a Data line Data, a light emitting control line EM, a Gate line Gate, a power voltage terminal ELVDD, and a first electrode of a first light emitting element EL1, and is configured to generate a driving current for driving the first light emitting element EL1 to emit light according to a power voltage Vdd and a Data voltage on the Data line Data under control of a Gate driving signal provided by the Gate line Gate and a light emitting control signal provided by the light emitting control line EM; the power supply voltage terminal ELVDD is used to provide the power supply voltage Vdd;
the dimming circuit 12 is electrically connected to the second pole of the first light emitting element EL 2;
the dimming circuit 12 comprises N dimming light emitting elements and a dimming sub-circuit (not shown in fig. 1); n is a positive integer;
the dimming sub-circuit is used for controlling whether the pixel driving circuit 11 drives the dimming light-emitting element to emit light or not under the control of a dimming control signal.
The pixel circuit provided by the embodiment of the invention can realize full-brightness DC dimming, avoids the damage of PWM (pulse width modulation) dimming low-frequency flicker to the vision of human eyes, can control the change of the power voltage within a small range, can realize full-brightness DC dimming without regulating the power voltage to low voltage, and eliminates the problems of wiping cloth screen, color deviation, smear and the like of the DC dimming under low brightness.
In the embodiment of the present invention, the first light emitting element may be an organic light emitting diode, but is not limited thereto; the first electrode of the first light emitting element is an anode, and the second electrode of the first light emitting element is a cathode.
In the embodiment of the present invention, the dimming light emitting element may also be an organic light emitting diode, but is not limited thereto.
According to a particular embodiment, N is equal to 1;
the dimming circuit comprises a first dimming light emitting element and a dimming sub-circuit, the dimming sub-circuit comprising a first dimming switching transistor; the dimming control signal comprises a first dimming control signal;
a first electrode of the first dimming light-emitting element is electrically connected with a second electrode of the first light-emitting element, and the second electrode of the first dimming light-emitting element is electrically connected with a first voltage end;
the control electrode of the first dimming switch transistor is electrically connected with a first dimming control signal end, the first electrode of the first dimming switch transistor is electrically connected with the first electrode of the first dimming light-emitting element, and the second electrode of the first dimming switch transistor is electrically connected with a second voltage end.
In the embodiment of the present invention, the first voltage terminal may be a low voltage terminal or a ground terminal, and the second voltage terminal may be a low voltage terminal or a ground terminal, but not limited thereto.
As shown in fig. 2, on the basis of the embodiment of the pixel circuit shown in fig. 1, the dimming circuit includes a first dimming light emitting element EL21 and a dimming sub-circuit 20, and the dimming sub-circuit 20 includes a first dimming switching transistor T7; the dimming control signal comprises a first dimming control signal;
a first pole of the first dimming light emitting element EL21 is electrically connected with a second pole of the first light emitting element EL1, and a second pole of the first dimming light emitting element EL21 is electrically connected with a first voltage terminal V1;
the gate of the first dimming switching transistor T7 is electrically connected to a first dimming control signal terminal Vdc1, the source of the first dimming switching transistor T7 is electrically connected to the first pole of the first dimming light emitting element EL1, and the drain of the first dimming switching transistor T7 is electrically connected to a second voltage terminal V2.
In the embodiment shown in fig. 2, T7 is a p-type tft, but not limited thereto.
In the embodiment of the present invention, L0 is the highest brightness of the display panel.
In operation of the embodiment of the invention as shown in figure 2,
when the desired luminance range is greater than or equal to 0.5L0 and less than or equal to L0, Vdc1 provides the high voltage, T7 is turned off, pixel drive circuit 11 drives EL1 and EL21 to both emit light, and controls Vdd to be adjusted between the first supply voltage Vdd1 to the second supply voltage Vdd2 according to the desired luminance; for example, Vdd1 may be 2.5V, Vdd2 may be 5V, Vdd is Vdd1 when the desired luminance is 0.5L0, and Vdd is Vdd2 when the desired luminance is L0, but not limited thereto;
when the desired brightness range is greater than or equal to 0.25L0 and less than 0.5L0, Vdc1 provides low voltage, T7 is turned on, the pixel driving circuit 11 drives EL1 to emit light, EL21 does not emit light, the display brightness is reduced by 50% as a whole, and then DC dimming is realized by adjusting Vdd to control the magnitude of the driving current flowing through EL 1; controlling Vdd to be adjusted between a first power supply voltage Vdd1 to a second power supply voltage Vdd2 according to a desired brightness; for example, Vdd1 may be 2.5V, Vdd2 may be 5V, Vdd is Vdd1 when the desired luminance is 0.25L0, and Vdd may be Vdd2 when the desired luminance is 0.5L0, but not limited thereto;
when the desired luminance range is less than 0.25L0, Vdc1 provides a low voltage, T7 is turned on, the pixel driving circuit 11 drives EL1 to emit light, EL21 does not emit light, the display luminance is reduced by 50% as a whole, the overall luminance can be reduced to 25% in combination with Vdd regulation (for example, Vdd can also be regulated between the first power supply voltage Vdd1 and the second power supply voltage Vdd 2), and then DC dimming is implemented by compressing the data voltage through a software algorithm, which may be as follows:
wherein Ceil is an integer function, x is a brightness adjustment percentage, Lmax is the actually displayed highest gray scale, Lorigin is the unadjusted front gray scale, and Ldisplay is the adjusted rear gray scale; for example, when x is equal to 5.4%, that is, the desired luminance is 0.054L0, Lmax is equal to 127, Ldisplay is equal to 127 when Lorigin is 255 or 254, Ldisplay is equal to 0 when Lorigin is 1 or 0; when the desired luminance is 0.054L0 and the gray scale originally supplied to Tcon (timing controller) is, for example, 255, the adjusted gray scale supplied to the source driver is set to 127 by a software algorithm in Tcon, and the source driver supplies a Data voltage corresponding to the adjusted gray scale to the pixel circuit through the Data line Data.
As can be seen from the above working process of the embodiment of the present invention as shown in fig. 2, even if the desired brightness is low, the power voltage Vdd does not need to be adjusted to a low voltage, and Vdd is adjusted between Vdd1 and Vdd2, so that full-brightness DC dimming can be realized, and meanwhile, the problems of wiping, color deviation, and smear at low brightness can be eliminated, and the damage of PWM (pulse width modulation) dimming low-frequency flicker to the vision of human eyes can be avoided. By analogy, the brightness during the intervention of the software algorithm can be reduced by increasing the number of the light-emitting elements in the dimming unit, so that the DC dimming under the low brightness can be better realized.
According to another embodiment, N is equal to 2;
the dimming circuit comprises a first dimming light-emitting element, a second dimming light-emitting element and a dimming sub-circuit, wherein the dimming sub-circuit comprises a first dimming switching transistor and a second dimming switching transistor; the dimming control signal comprises a first dimming control signal and a second dimming control signal;
a first pole of the first dimming light emitting element is electrically connected to a second pole of the first light emitting element, and the second pole of the first dimming light emitting element is electrically connected to the first pole of the second dimming light emitting element; the second pole of the second dimming light-emitting element is electrically connected with the first voltage end;
a control electrode of the first dimming switching transistor is electrically connected with a first dimming control signal end, a first electrode of the first dimming switching transistor is electrically connected with a first electrode of the first dimming light-emitting element, and a second electrode of the first dimming switching transistor is electrically connected with a second voltage end;
the control electrode of the second dimming switch transistor is electrically connected with the second dimming control signal end, the first electrode of the second dimming switch transistor is electrically connected with the first electrode of the second dimming light-emitting element, and the second electrode of the second dimming switch transistor is electrically connected with the second voltage end.
In specific implementation, N may also be an integer greater than 2.
As shown in fig. 3, on the basis of the embodiment of the pixel circuit shown in fig. 1, the dimming circuit includes a first dimming light emitting element EL21, a second dimming light emitting element EL22 and a dimming sub-circuit 20, and the dimming sub-circuit 20 includes a first dimming switching transistor T7 and a second dimming switching transistor T8; the dimming control signal comprises a first dimming control signal and a second dimming control signal;
a first pole of the first dimming light emitting element EL21 is electrically connected to a second pole of the first light emitting element EL1, and a second pole of the first dimming light emitting element EL21 is electrically connected to a first pole of the second dimming light emitting element EL 22; a second pole of the second dimmed light emitting element EL22 is electrically connected to a first voltage terminal V1;
a gate of the first dimming switching transistor T7 is electrically connected to a first dimming control signal terminal Vdc1, a source of the first dimming switching transistor T7 is electrically connected to a first pole of the first dimming light emitting element EL21, and a drain of the first dimming switching transistor T7 is electrically connected to a second voltage terminal V2;
the gate of the second dimming switching transistor T8 is electrically connected to a second dimming control signal terminal Vdc2, the source of the second dimming switching transistor T8 is electrically connected to the first pole of the second dimming light emitting element EL22, and the drain of the second dimming switching transistor T8 is electrically connected to a second voltage terminal V2.
In the embodiment shown in fig. 3, V1 can be a low voltage terminal or a ground terminal, and V2 can be a low voltage terminal or a ground terminal, but not limited thereto.
In the embodiment shown in fig. 3, T7 and T8 may be p-type thin film transistors, but are not limited thereto.
In the embodiment of the invention, the pixel driving circuit comprises a driving circuit, a data writing circuit, a first light-emitting control circuit, a second light-emitting control circuit, a compensation control circuit and an energy storage circuit;
the data writing circuit is respectively electrically connected with the grid line, the data line and the first end of the driving circuit and is used for controlling the data voltage on the data line to be supplied to the first end of the driving circuit under the control of a grid driving signal supplied by the grid line;
the first light-emitting control circuit is respectively electrically connected with a light-emitting control line, a power supply voltage end and the first end of the driving circuit and is used for controlling the communication between the power supply voltage end and the first end of the driving circuit under the control of a light-emitting control signal provided by the light-emitting control line;
the second light-emitting control circuit is respectively electrically connected with a light-emitting control line, a second end of the driving circuit and the first pole of the first light-emitting element, and is used for controlling the communication between the second end of the driving circuit and the first pole of the first light-emitting element under the control of a light-emitting control signal provided by the light-emitting control line;
the compensation control circuit is respectively electrically connected with the grid line, the control end of the drive circuit and the second end of the drive circuit and is used for controlling the communication between the control end of the drive circuit and the second end of the drive circuit under the control of the grid drive signal;
the energy storage circuit is electrically connected with the control end of the driving circuit and used for storing electric energy;
the drive circuit is used for generating the drive current under the control of the potential of the control end of the drive circuit.
In the embodiment of the present invention, the structure of the pixel driving circuit is not limited to the above structure.
In a specific implementation, the pixel driving circuit may further include a reset circuit;
the reset circuit is respectively electrically connected with the reset end, the initial voltage end and the control end of the drive circuit and is used for controlling the initial voltage end to be communicated with the control end of the drive circuit under the control of a reset control signal provided by the reset end.
As shown in fig. 4, on the basis of the embodiment of the pixel circuit shown in fig. 1, the pixel driving circuit includes a driving circuit 41, a data writing circuit 42, a first light emission control circuit 431, a second light emission control circuit 432, a compensation control circuit 44, a tank circuit 45, and a reset circuit 46;
the Data writing circuit 42 is electrically connected to the Gate line Gate, the Data line Data and the first end of the driving circuit 41, respectively, and is configured to control the Data voltage on the Data line Data to be supplied to the first end of the driving circuit 41 under the control of the Gate driving signal supplied by the Gate line Gate;
the first light emitting control circuit 431 is electrically connected to a light emitting control line EM, a power supply voltage terminal ELVDD, and a first end of the driving circuit 41, respectively, and is configured to control communication between the power supply voltage terminal ELVDD and the first end of the driving circuit 41 under the control of a light emitting control signal provided by the light emitting control line EM;
the second emission control circuit 432 is electrically connected to an emission control line EM, a second terminal of the driving circuit 41, and a first electrode of the first emission element EL1, respectively, for controlling communication between the second terminal of the driving circuit 41 and the first electrode of the first emission element EL1 under the control of an emission control signal provided by the emission control line EM;
the compensation control circuit 44 is electrically connected to the Gate line Gate, the control terminal of the driving circuit 41 and the second terminal of the driving circuit 41, respectively, and is configured to control the communication between the control terminal of the driving circuit 41 and the second terminal of the driving circuit 41 under the control of the Gate driving signal;
the energy storage circuit 45 is electrically connected with the control end of the driving circuit 41 and is used for storing electric energy;
the driving circuit 41 is configured to generate the driving current under control of a potential of a control terminal thereof;
the Reset circuit 46 is electrically connected to a Reset terminal Reset, an initial voltage terminal, and a control terminal of the driving circuit 41, and is configured to control the initial voltage terminal to communicate with the control terminal of the driving circuit 41 under the control of a Reset control signal provided by the Reset terminal Reset; the starting voltage end is used for providing a starting voltage Vinit.
Optionally, the driving circuit includes a driving transistor, the data writing circuit includes a data writing transistor, the first light emission control circuit includes a first light emission control transistor, the second light emission control circuit includes a second light emission control transistor, the compensation control circuit includes a compensation control transistor, and the energy storage circuit includes a storage capacitor;
the control electrode of the driving transistor is electrically connected with the control end of the driving circuit, the first electrode of the driving transistor is electrically connected with the first end of the driving circuit, and the second electrode of the driving transistor is electrically connected with the second end of the driving circuit;
a control electrode of the data writing transistor is electrically connected with the grid line, a first electrode of the data writing transistor is electrically connected with the data line, and a second electrode of the data writing transistor is electrically connected with the first electrode of the driving transistor;
a control electrode of the first light-emitting control transistor is electrically connected to the light-emitting control line, a first electrode of the first light-emitting control transistor is electrically connected to the power supply voltage terminal, and a second electrode of the first light-emitting control transistor is electrically connected to the first electrode of the driving transistor;
a control electrode of the second light emission control transistor is electrically connected to the light emission control line, a first electrode of the second light emission control transistor is electrically connected to a second electrode of the driving transistor, and the second electrode of the second light emission control transistor is electrically connected to the first electrode of the first light emitting element;
a control electrode of the compensation control transistor is electrically connected with the grid line, a first electrode of the compensation control transistor is electrically connected with a control electrode of the driving transistor, and a second electrode of the compensation control transistor is electrically connected with a second electrode of the driving transistor;
the first end of the storage capacitor is electrically connected with the control electrode of the driving transistor, and the second end of the storage capacitor is electrically connected with the power supply voltage end.
Optionally, the reset circuit comprises a reset transistor;
the control electrode of the reset transistor is electrically connected with the reset end, the first electrode of the reset transistor is electrically connected with the control end of the driving circuit, and the second electrode of the reset transistor is electrically connected with the initial voltage end.
As shown in fig. 5, on the basis of the embodiment of the pixel circuit shown in fig. 4, in the first embodiment of the pixel circuit according to the present invention,
the first light emitting element is a first organic light emitting diode OLED 1;
the dimming circuit comprises a first dimming organic light emitting diode OLED21 and a dimming sub-circuit 20, the dimming sub-circuit 20 comprising a first dimming switching transistor T7; the dimming control signal comprises a first dimming control signal;
the anode of the OLED21 is electrically connected to the cathode of the OLED1, and the cathode of the OLED21 is electrically connected to the low voltage terminal ELVSS;
the gate electrode of the first dimming switching transistor T7 is electrically connected to a first dimming control signal terminal Vdc1, the source electrode of the first dimming switching transistor T7 is electrically connected to the anode electrode of the OLED1, and the drain electrode of the first dimming switching transistor T7 is electrically connected to a low voltage terminal ELVSS;
the driving circuit 41 includes a driving transistor T3, the data writing circuit 42 includes a data writing transistor T6, the first light emission control circuit 431 includes a first light emission control transistor T1, the second light emission control circuit 432 includes a second light emission control transistor T5, the compensation control circuit 44 includes a compensation control transistor T2, and the tank circuit 45 includes a storage capacitor Cst;
the Gate of the Data writing transistor T6 is electrically connected to the Gate line Gate, the source of the Data writing transistor T6 is electrically connected to the Data line Data, and the drain of the Data writing transistor T6 is electrically connected to the source of the driving transistor T3;
a gate of the first light emitting control transistor T1 is electrically connected to the light emitting control line EM, a source of the first light emitting control transistor T1 is electrically connected to the power voltage terminal ELVDD, and a drain of the first light emitting control transistor T1 is electrically connected to the source of the driving transistor T3;
a gate of the second light emission controlling transistor T5 is electrically connected to the light emission control line EM, a source of the second light emission controlling transistor T5 is electrically connected to the drain of the driving transistor T3, and a drain of the second light emission controlling transistor T5 is electrically connected to an anode of the OLED 1;
the Gate of the compensation control transistor T2 is electrically connected to the Gate line Gate, the source of the compensation control transistor T2 is electrically connected to the Gate G of the driving transistor T3, and the drain of the compensation control transistor T2 is electrically connected to the drain of the driving transistor T3;
a first terminal of the storage capacitor Cst is electrically connected to the gate electrode G of the driving transistor T3, and a second terminal of the storage capacitor Cst is electrically connected to the power supply voltage terminal ELVDD;
the reset circuit 46 includes a reset transistor T4;
the gate of the Reset transistor T4 is electrically connected to the Reset terminal Reset, the source of the Reset transistor T4 is electrically connected to the drain of the driving transistor T3, and the drain of the Reset transistor T4 is electrically connected to the initial voltage terminal; the initial voltage terminal is used for providing Vinit.
In the first embodiment of the pixel circuit, T1-T7 are all p-type thin film transistors, but not limited thereto.
As shown in fig. 6, on the basis of the embodiment of the pixel circuit shown in fig. 4, in the second embodiment of the pixel circuit according to the present invention,
the first light emitting element is a first organic light emitting diode OLED 1;
the dimming circuit comprises a first dimming organic light emitting diode OLED21, a second dimming organic light emitting diode OLED22, and a dimming sub-circuit 20, the dimming sub-circuit 20 comprising a first dimming switching transistor T7 and a second dimming switching transistor T8; the dimming control signal comprises a first dimming control signal and a second dimming control signal;
the anode of OLED21 is electrically connected to the cathode of OLED1, and the cathode of OLED21 is electrically connected to the anode of OLED 22; the cathode of the OLED22 is electrically connected to the low voltage terminal ELVSS;
the gate electrode of the first dimming switching transistor T7 is electrically connected to a first dimming control signal terminal Vdc1, the source electrode of the first dimming switching transistor T7 is electrically connected to the anode electrode of the OLED21, and the drain electrode of the first dimming switching transistor T7 is electrically connected to the low voltage terminal ELVSS;
the gate electrode of the second dimming switching transistor T8 is electrically connected to the second dimming control signal terminal Vdc2, the source electrode of the second dimming switching transistor T8 is electrically connected to the anode electrode of the OLED22, and the drain electrode of the second dimming switching transistor T8 is electrically connected to the low voltage terminal ELVSS;
the driving circuit 41 includes a driving transistor T3, the data writing circuit 42 includes a data writing transistor T6, the first light emission control circuit 431 includes a first light emission control transistor T1, the second light emission control circuit 432 includes a second light emission control transistor T5, the compensation control circuit 44 includes a compensation control transistor T2, and the tank circuit 45 includes a storage capacitor Cst;
the Gate of the Data writing transistor T6 is electrically connected to the Gate line Gate, the source of the Data writing transistor T6 is electrically connected to the Data line Data, and the drain of the Data writing transistor T6 is electrically connected to the source of the driving transistor T3;
a gate of the first light emitting control transistor T1 is electrically connected to the light emitting control line EM, a source of the first light emitting control transistor T1 is electrically connected to the power voltage terminal ELVDD, and a drain of the first light emitting control transistor T1 is electrically connected to the source of the driving transistor T3;
a gate of the second light emission controlling transistor T5 is electrically connected to the light emission control line EM, a source of the second light emission controlling transistor T5 is electrically connected to the drain of the driving transistor T3, and a drain of the second light emission controlling transistor T5 is electrically connected to an anode of the OLED 1;
the Gate of the compensation control transistor T2 is electrically connected to the Gate line Gate, the source of the compensation control transistor T2 is electrically connected to the Gate G of the driving transistor T3, and the drain of the compensation control transistor T2 is electrically connected to the drain of the driving transistor T3;
a first terminal of the storage capacitor Cst is electrically connected to the gate electrode G of the driving transistor T3, and a second terminal of the storage capacitor Cst is electrically connected to the power supply voltage terminal ELVDD;
the reset circuit 46 includes a reset transistor T4;
the gate of the Reset transistor T4 is electrically connected to the Reset terminal Reset, the source of the Reset transistor T4 is electrically connected to the drain of the driving transistor T3, and the drain of the Reset transistor T4 is electrically connected to the initial voltage terminal; the initial voltage terminal is used for providing Vinit.
In the second embodiment of the pixel circuit, T7 and T8 are p-type thin film transistors, and T1 to T6 are all p-type thin film transistors, but not limited thereto.
The display module comprises a display panel and a dimming control circuit, wherein the display panel comprises the pixel circuit and the dimming control circuit;
the dimming control circuit is used for controlling and adjusting the dimming control signal, the data voltage and the power supply voltage according to the expected brightness of the display panel.
The display module can realize full-brightness DC dimming, avoids the damage of PWM (pulse width modulation) dimming low-frequency flicker to the vision of human eyes, can control the change of the power voltage within a small range, can realize full-brightness DC dimming without regulating the power voltage to low voltage, and eliminates the problems of wiping cloth screen, color deviation, smear and the like of the DC dimming under low brightness.
The dimming method provided by the embodiment of the invention is applied to the display module, and comprises the following steps:
the dimming control circuit controls and adjusts the dimming control signal, the data voltage and the power voltage according to the desired brightness of the display panel.
In particular implementation, the dimming method may include:
when the expected brightness of the display panel is larger than or equal to a first preset expected brightness, the dimming control circuit controls to provide the dimming control signal so as to control the N dimming light-emitting elements to emit light in a light-emitting stage, and the dimming control circuit correspondingly adjusts the power supply voltage according to the expected brightness; n is a positive integer;
when the expected brightness of the display panel is greater than or equal to a second preset expected brightness and less than the first preset expected brightness, the dimming control circuit provides the dimming control signal according to the expected brightness so as to control at least one of the N dimming light-emitting elements not to emit light in a light-emitting stage, and the dimming control circuit correspondingly adjusts the power supply voltage according to the expected brightness;
when the expected brightness of the display panel is smaller than the second preset expected brightness, the dimming control circuit controls to provide the dimming control signal so as to control none of the N dimming light-emitting elements to emit light in a light-emitting stage, and the dimming control circuit correspondingly adjusts the data voltage and the power supply voltage according to the expected brightness; n is a positive integer.
In the embodiment of the present invention, the first predetermined desired luminance and the second predetermined desired luminance may be selected according to actual conditions, for example, when the structure of the pixel circuit is as shown in fig. 2, the first predetermined desired luminance may be 0.5L0, and the second predetermined desired luminance may be 0.25L 0.
The display device provided by the embodiment of the invention comprises the display module.
The display device provided by the embodiment of the invention can be any product or component with a display function, such as a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A display module is characterized by comprising a display panel and a dimming control circuit, wherein the display panel comprises a pixel circuit;
the pixel circuit includes a pixel driving circuit, a first light emitting element, and a dimming circuit, wherein,
the pixel driving circuit is respectively electrically connected with a data line, a light-emitting control line, a grid line, a power voltage end and a first electrode of a first light-emitting element, and is used for generating a driving current for driving the first light-emitting element to emit light according to a power voltage provided by the power voltage end and a data voltage on the data line under the control of a grid driving signal provided by the grid line and a light-emitting control signal provided by the light-emitting control line;
the dimming circuit is electrically connected with the second pole of the first light-emitting element;
the dimming circuit comprises N dimming light-emitting elements and a dimming sub-circuit; n is a positive integer;
the dimming sub-circuit is used for controlling the pixel driving circuit to drive the dimming light-emitting element to emit light or not under the control of a dimming control signal;
the dimming control circuit is used for controlling and adjusting a dimming control signal, a data voltage and a power supply voltage according to the expected brightness of the display panel;
when the expected brightness of the display panel is larger than or equal to a first preset expected brightness, the dimming control circuit is used for controlling and providing the dimming control signal so as to control the N dimming light-emitting elements to emit light in a light-emitting stage, and the dimming control circuit adjusts the power supply voltage according to the expected brightness;
when the desired brightness of the display panel is greater than or equal to a second predetermined desired brightness and less than the first predetermined desired brightness, the dimming control circuit is used for providing the dimming control signal according to the desired brightness to control at least one of the N dimming light-emitting elements not to emit light in a light-emitting stage, and the dimming control circuit correspondingly adjusts the power supply voltage according to the desired brightness;
when the expected brightness of the display panel is smaller than the second preset expected brightness, the dimming control circuit is used for controlling the dimming control signal to be provided so as to control the N dimming light-emitting elements not to emit light in a light-emitting stage, and the dimming control circuit correspondingly adjusts the data voltage and the power supply voltage according to the expected brightness.
2. The display module of claim 1, wherein N is equal to 1;
the dimming circuit comprises a first dimming light emitting element and a dimming sub-circuit, the dimming sub-circuit comprising a first dimming switching transistor; the dimming control signal comprises a first dimming control signal;
a first electrode of the first dimming light-emitting element is electrically connected with a second electrode of the first light-emitting element, and the second electrode of the first dimming light-emitting element is electrically connected with a first voltage end;
the control electrode of the first dimming switch transistor is electrically connected with a first dimming control signal end, the first electrode of the first dimming switch transistor is electrically connected with the first electrode of the first dimming light-emitting element, and the second electrode of the first dimming switch transistor is electrically connected with a second voltage end.
3. The display module of claim 1, wherein N is equal to 2;
the dimming circuit comprises a first dimming light-emitting element, a second dimming light-emitting element and a dimming sub-circuit, wherein the dimming sub-circuit comprises a first dimming switching transistor and a second dimming switching transistor; the dimming control signal comprises a first dimming control signal and a second dimming control signal;
a first pole of the first dimming light emitting element is electrically connected to a second pole of the first light emitting element, and the second pole of the first dimming light emitting element is electrically connected to the first pole of the second dimming light emitting element; the second pole of the second dimming light-emitting element is electrically connected with the first voltage end;
a control electrode of the first dimming switching transistor is electrically connected with a first dimming control signal end, a first electrode of the first dimming switching transistor is electrically connected with a first electrode of the first dimming light-emitting element, and a second electrode of the first dimming switching transistor is electrically connected with a second voltage end;
the control electrode of the second dimming switch transistor is electrically connected with the second dimming control signal end, the first electrode of the second dimming switch transistor is electrically connected with the first electrode of the second dimming light-emitting element, and the second electrode of the second dimming switch transistor is electrically connected with the second voltage end.
4. The display module according to any one of claims 1 to 3, wherein the pixel driving circuit comprises a driving circuit, a data writing circuit, a first light-emitting control circuit, a second light-emitting control circuit, a compensation control circuit and a tank circuit;
the data writing circuit is respectively electrically connected with the grid line, the data line and the first end of the driving circuit and is used for controlling the data voltage on the data line to be supplied to the first end of the driving circuit under the control of a grid driving signal supplied by the grid line;
the first light-emitting control circuit is respectively electrically connected with a light-emitting control line, a power supply voltage end and the first end of the driving circuit and is used for controlling the communication between the power supply voltage end and the first end of the driving circuit under the control of a light-emitting control signal provided by the light-emitting control line;
the second light-emitting control circuit is respectively electrically connected with a light-emitting control line, a second end of the driving circuit and the first pole of the first light-emitting element, and is used for controlling the communication between the second end of the driving circuit and the first pole of the first light-emitting element under the control of a light-emitting control signal provided by the light-emitting control line;
the compensation control circuit is respectively electrically connected with the grid line, the control end of the drive circuit and the second end of the drive circuit and is used for controlling the communication between the control end of the drive circuit and the second end of the drive circuit under the control of the grid drive signal;
the energy storage circuit is electrically connected with the control end of the driving circuit and used for storing electric energy;
the drive circuit is used for generating the drive current under the control of the potential of the control end of the drive circuit.
5. The display module of claim 4, wherein the pixel driving circuit further comprises a reset circuit;
the reset circuit is respectively electrically connected with the reset end, the initial voltage end and the control end of the drive circuit and is used for controlling the initial voltage end to be communicated with the control end of the drive circuit under the control of a reset control signal provided by the reset end.
6. The display module as recited in claim 4 wherein said drive circuit comprises a drive transistor, said data write circuit comprises a data write transistor, said first emission control circuit comprises a first emission control transistor, said second emission control circuit comprises a second emission control transistor, said compensation control circuit comprises a compensation control transistor, said tank circuit comprises a storage capacitor;
the control electrode of the driving transistor is electrically connected with the control end of the driving circuit, the first electrode of the driving transistor is electrically connected with the first end of the driving circuit, and the second electrode of the driving transistor is electrically connected with the second end of the driving circuit;
a control electrode of the data writing transistor is electrically connected with the grid line, a first electrode of the data writing transistor is electrically connected with the data line, and a second electrode of the data writing transistor is electrically connected with the first electrode of the driving transistor;
a control electrode of the first light-emitting control transistor is electrically connected to the light-emitting control line, a first electrode of the first light-emitting control transistor is electrically connected to the power supply voltage terminal, and a second electrode of the first light-emitting control transistor is electrically connected to the first electrode of the driving transistor;
a control electrode of the second light emission control transistor is electrically connected to the light emission control line, a first electrode of the second light emission control transistor is electrically connected to a second electrode of the driving transistor, and the second electrode of the second light emission control transistor is electrically connected to the first electrode of the first light emitting element;
a control electrode of the compensation control transistor is electrically connected with the grid line, a first electrode of the compensation control transistor is electrically connected with a control electrode of the driving transistor, and a second electrode of the compensation control transistor is electrically connected with a second electrode of the driving transistor;
the first end of the storage capacitor is electrically connected with the control electrode of the driving transistor, and the second end of the storage capacitor is electrically connected with the power supply voltage end.
7. The display module of claim 5, wherein the reset circuit comprises a reset transistor;
the control electrode of the reset transistor is electrically connected with the reset end, the first electrode of the reset transistor is electrically connected with the control end of the driving circuit, and the second electrode of the reset transistor is electrically connected with the initial voltage end.
8. A dimming method applied to the display module set according to any one of claims 1 to 7, wherein the dimming method comprises:
the dimming control circuit controls and adjusts the dimming control signal, the data voltage and the power supply voltage according to the expected brightness of the display panel;
the dimming method comprises the following steps:
when the expected brightness of the display panel is larger than or equal to a first preset expected brightness, the dimming control circuit controls to provide the dimming control signal so as to control the N dimming light-emitting elements to emit light in a light-emitting stage, and the dimming control circuit adjusts the power supply voltage according to the expected brightness;
when the desired brightness of the display panel is greater than or equal to a second predetermined desired brightness and less than the first predetermined desired brightness, the dimming control circuit provides the dimming control signal according to the desired brightness to control at least one of the N dimming light emitting elements not to emit light in a light emitting phase, and the dimming control circuit adjusts the power supply voltage according to the desired brightness;
when the expected brightness of the display panel is smaller than the second preset expected brightness, the dimming control circuit controls to provide the dimming control signal so as to control none of the N dimming light-emitting elements to emit light in a light-emitting stage, and the dimming control circuit correspondingly adjusts the data voltage and the power supply voltage according to the expected brightness; n is a positive integer.
9. A display device, comprising the display module set claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010663604.XA CN111696485B (en) | 2020-07-10 | 2020-07-10 | Pixel circuit, display module, dimming method and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010663604.XA CN111696485B (en) | 2020-07-10 | 2020-07-10 | Pixel circuit, display module, dimming method and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111696485A CN111696485A (en) | 2020-09-22 |
| CN111696485B true CN111696485B (en) | 2021-10-12 |
Family
ID=72485302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010663604.XA Active CN111696485B (en) | 2020-07-10 | 2020-07-10 | Pixel circuit, display module, dimming method and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111696485B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112863436B (en) * | 2021-01-11 | 2022-06-10 | 京东方科技集团股份有限公司 | Pixel circuit, driving method, electroluminescent display panel and display device |
| CN112992040B (en) * | 2021-04-13 | 2022-11-22 | 成都天马微电子有限公司 | Adjusting circuit and display device |
| CN114783357B (en) * | 2022-04-14 | 2023-07-25 | Tcl华星光电技术有限公司 | Pixel driving circuit and display panel |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102473379A (en) * | 2009-07-17 | 2012-05-23 | 普瑞光电股份有限公司 | Reconfigurable LED array and use in lighting system |
| CN102576811A (en) * | 2009-08-17 | 2012-07-11 | 希百特股份有限公司 | Amoled with cascaded OLED structures |
| CN107564478A (en) * | 2017-10-18 | 2018-01-09 | 京东方科技集团股份有限公司 | A kind of display panel and its display methods, display device |
| CN107644948A (en) * | 2017-10-10 | 2018-01-30 | 京东方科技集团股份有限公司 | A kind of luminescent device, image element circuit, its control method and related device |
| CN108648690A (en) * | 2018-04-26 | 2018-10-12 | 上海天马有机发光显示技术有限公司 | A kind of display panel and display device |
| CN109119027A (en) * | 2018-09-10 | 2019-01-01 | 京东方科技集团股份有限公司 | Pixel circuit and its driving method and display panel |
| CN110288940A (en) * | 2018-12-12 | 2019-09-27 | 友达光电股份有限公司 | Display device and its operating method |
| CN110400820A (en) * | 2018-04-19 | 2019-11-01 | 群创光电股份有限公司 | Electronic device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE602007007804D1 (en) * | 2006-11-10 | 2010-08-26 | Philips Solid State Lighting | METHOD AND DEVICE FOR CONTROLLING REAR-OPERATED LED |
| JP2019139896A (en) * | 2018-02-08 | 2019-08-22 | シャープ株式会社 | Light-emitting module and light-emitting device |
-
2020
- 2020-07-10 CN CN202010663604.XA patent/CN111696485B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102473379A (en) * | 2009-07-17 | 2012-05-23 | 普瑞光电股份有限公司 | Reconfigurable LED array and use in lighting system |
| CN102576811A (en) * | 2009-08-17 | 2012-07-11 | 希百特股份有限公司 | Amoled with cascaded OLED structures |
| CN107644948A (en) * | 2017-10-10 | 2018-01-30 | 京东方科技集团股份有限公司 | A kind of luminescent device, image element circuit, its control method and related device |
| CN107564478A (en) * | 2017-10-18 | 2018-01-09 | 京东方科技集团股份有限公司 | A kind of display panel and its display methods, display device |
| CN110400820A (en) * | 2018-04-19 | 2019-11-01 | 群创光电股份有限公司 | Electronic device |
| CN108648690A (en) * | 2018-04-26 | 2018-10-12 | 上海天马有机发光显示技术有限公司 | A kind of display panel and display device |
| CN109119027A (en) * | 2018-09-10 | 2019-01-01 | 京东方科技集团股份有限公司 | Pixel circuit and its driving method and display panel |
| CN110288940A (en) * | 2018-12-12 | 2019-09-27 | 友达光电股份有限公司 | Display device and its operating method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111696485A (en) | 2020-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111696485B (en) | Pixel circuit, display module, dimming method and display device | |
| CN109272940B (en) | Pixel driving circuit, driving method thereof and display substrate | |
| KR101258857B1 (en) | active matrix organic light emitting diode display | |
| JP4145737B2 (en) | Organic electroluminescent device and driving method thereof | |
| CN108630151B (en) | Pixel circuit, driving method thereof, array substrate and display device | |
| CN112102785A (en) | Pixel circuit, display panel, driving method of display panel and display device | |
| CN111445857A (en) | Pixel driving circuit, driving method thereof and display device | |
| KR101065321B1 (en) | Organic light emitting display device and driving method thereof | |
| CN112992069A (en) | Display control device, display device, recording medium, and control method | |
| CN111937065B (en) | Display device driving method and display device | |
| CN114038420B (en) | Display panel and display device | |
| CN113892132B (en) | Pixel circuit, driving method and display device | |
| CN213277408U (en) | Pixel circuit, display panel and display device | |
| US20240078972A1 (en) | Display panel, method for driving display panel, driving circuit and display device | |
| WO2023207195A1 (en) | Pixel driving circuit, control method, display screen and display device | |
| CN112216244A (en) | Display panel, driving method thereof and display module | |
| CN114724514A (en) | Pixel driving circuit, driving method thereof, display panel and display device | |
| CN109872693B (en) | Pixel, driving method, display panel with pixel and display device | |
| CN113554985B (en) | Organic light emitting diode driving apparatus, control method and display device | |
| CN110706657B (en) | Pixel circuit and display device | |
| KR20050036238A (en) | Organic electro-luminescent panel, and display device having the same | |
| CN112967683A (en) | Power supply control method, power supply control chip, display panel and display device | |
| KR20080060897A (en) | Organic light emitting display and method for driving the same | |
| CN114187872B (en) | Display panel driving method and display device | |
| US20230230535A1 (en) | Display panel and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |