CN112201200A - Pixel driving circuit and display device - Google Patents
Pixel driving circuit and display device Download PDFInfo
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- CN112201200A CN112201200A CN202011154381.0A CN202011154381A CN112201200A CN 112201200 A CN112201200 A CN 112201200A CN 202011154381 A CN202011154381 A CN 202011154381A CN 112201200 A CN112201200 A CN 112201200A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- 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
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- Control Of El Displays (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The application provides a pixel driving circuit and a display device, wherein the pixel driving circuit comprises a data input module, an adjusting module and a light emitting module; the data input module is accessed to a scanning signal and a first data signal and is used for outputting the first data signal to the light-emitting module under the control of the scanning signal; the adjusting module is connected to a first control signal and a second data signal and used for outputting the second data signal to the light-emitting module under the control of the first control signal; the light emitting module is connected to the first data signal, the second data signal and the second control signal, and is used for adjusting the light emitting brightness according to the first data signal and the second data signal under the control of the second control signal. This application can adjust display device's demonstration luminance, obtains higher-order display effect to promote display quality.
Description
Technical Field
The application relates to the technical field of display, in particular to a pixel driving circuit and a display device.
Background
With the continuous development of science and technology, people are in more and more frequent contact with electronic equipment, and the requirements on display devices are also continuously improved. The MiniLED (Mini Light-Emitting Diode) display device has many advantages such as high brightness, flexibility, and being capable of manufacturing high dynamic contrast display technology, narrow frame display technology, and special-shaped display technology, and has become a hot point of market research. In addition, as the market advances in display specifications, techniques have emerged to vary the contrast and brightness of the display device as the ambient brightness varies. For example, high contrast and low luminance are required in night display, and low contrast and high luminance are required in daytime display or outdoor display.
However, the brightness and the gray scale number of the display device cannot be improved better due to the characteristics of the light emitting device and other factors, and therefore, a pixel driving circuit capable of adjusting the brightness and improving the display quality is provided.
Disclosure of Invention
The application provides a pixel driving circuit and a display device to adjust the display brightness of the display device, obtain higher-order display effect and improve display quality.
The application provides a pixel driving circuit, which comprises a data input module, an adjusting module and a light emitting module;
the data input module is accessed to a scanning signal and a first data signal and is used for outputting the first data signal to the light-emitting module under the control of the scanning signal;
the adjusting module is connected to a first control signal and a second data signal and used for outputting the second data signal to the light-emitting module under the control of the first control signal;
the light emitting module is connected to the first data signal, the second data signal, the power voltage and the second control signal, and is used for adjusting the light emitting brightness according to the first data signal and the second data signal under the control of the second control signal.
In the pixel driving circuit provided by the application, the data input module comprises a first transistor and a capacitor;
the gate of the first transistor is connected to the scanning signal, the source of the first transistor is connected to the first data signal, the drain of the first transistor is electrically connected to a first node, the first end of the capacitor is electrically connected to the first node, and the second end of the capacitor is grounded.
In the pixel driving circuit provided by the application, the adjusting module comprises a second transistor;
the gate of the second transistor is connected to the first control signal, the source of the second transistor is connected to the second data signal, and the drain of the second transistor is electrically connected to the first node.
In the pixel driving circuit provided by the application, the light emitting module comprises a third transistor, a fourth transistor and a light emitting device;
the gate of the third transistor is electrically connected to the first node, the source of the third transistor is grounded, the drain of the third transistor is electrically connected to the second end of the light emitting device, the gate of the fourth transistor is connected to the second control signal, the source of the fourth transistor is connected to the power voltage, and the drain of the fourth transistor is electrically connected to the first end of the light emitting device.
In the pixel driving circuit provided by the present application, the first transistor, the second transistor, the third transistor, and the fourth transistor are all transistors of the same type.
In the pixel driving circuit provided by the application, the pixel driving circuit comprises a first working mode and a second working mode;
in the first working mode, the first control signal is at a low potential, and the light-emitting module emits light according to the first data signal;
in the second working mode, the first control signal is at a high potential, and the light emitting module adjusts the light emitting brightness according to the first data signal and the second data signal.
In the pixel driving circuit provided by the present application, in the second operating mode, a driving timing of the pixel driving circuit includes a first data writing phase, a first light emitting phase, a second data writing phase, and a second light emitting phase;
in the first data writing stage, the scanning signal is at a high potential, and both the first control signal and the second control signal are at a low potential;
in the first light-emitting stage, the second control signal is at a high potential, and both the scanning signal and the first control signal are at a low potential;
in the second data writing stage, the first control signal is at a high potential, and the scanning signal and the second control signal are both at a low potential;
in the second light-emitting stage, the second control signal is at a high potential, and the scanning signal and the first control signal are both at a low potential.
In the pixel driving circuit provided by the present application, a time length of the second light emitting period is longer than a time length of the first light emitting period.
In the pixel driving circuit provided by the present application, a voltage value of the second data voltage is greater than or less than a voltage value of the first data voltage.
The present application also provides a display device including the pixel driving circuit described in any one of the above.
The application provides a pixel drive circuit and display device, through increase the adjustment module in pixel drive circuit, utilize the combination each other of scanning signal, first control signal and second control signal for pixel drive circuit can work under different mode, and through adjusting first data voltage and second data voltage, can realize the display luminance of different specifications simultaneously, obtains higher-order display effect, promotes display quality.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a pixel driving circuit provided in the present application;
FIG. 2 is a circuit schematic of a pixel driving circuit provided herein;
FIG. 3 is a signal timing diagram of the pixel driving circuit of FIG. 2 in a first operating mode;
FIG. 4 is a first signal timing diagram of the pixel driving circuit of FIG. 2 in a second operating mode;
fig. 5 is a second signal timing diagram of the pixel driving circuit in fig. 2 in a second operation mode.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
The transistors used in all embodiments of the present application may be thin film transistors or field effect transistors or other devices with the same characteristics, and since the source and drain of the transistors used herein are symmetrical, the source and drain may be interchanged. In the embodiment of the present application, to distinguish two poles of a transistor except for a gate, one of the two poles is referred to as a source, and the other pole is referred to as a drain. The form in the drawing provides that the middle end of the switching transistor is a grid, the signal input end is a source, and the output end is a drain. In addition, the transistors used in the embodiments of the present application may include a P-type transistor and/or an N-type transistor, where the P-type transistor is turned on when the gate is at a low level and turned off when the gate is at a high level, and the N-type transistor is turned on when the gate is at a high level and turned off when the gate is at a low level.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a pixel driving circuit provided in the present application.
In the embodiment of the present application, the pixel driving circuit 100 includes a data input module 101, an adjustment module 102, and a light emitting module 103. The data input module 101, the adjusting module 102 and the light emitting module 103 are electrically connected to the first node Q.
The data input module 101 accesses the scan signal scan and the first data signal data1 for outputting the first data signal data1 to the light emitting module 103 under the control of the scan signal scan. The adjusting module 102 is connected to the first control signal EN and the second data signal data2, and is used for outputting the second data signal data2 to the light emitting module 103 under the control of the first control signal EN. The light emitting module 103 is connected to the first data signal data1, the second data signal data2, the power voltage VDD and the second control signal EM, and is configured to adjust the light emitting brightness according to the first data signal data1 and the second data signal data2 under the control of the second control signal EM.
The first data signal data1 and the second data signal data2 can be provided by the source driver chip; the scan signal scan can be provided by a Gate Driver on Array (GOA) circuit; the first control signal EN and the second control signal EM may be provided by a timing controller; this is not a particular limitation of the present application.
The application provides a pixel driving circuit 100, through increasing adjusting module 102 in pixel driving circuit 100, utilize the mutual combination of scan signal scan, first control signal EN and second control signal EM for pixel driving circuit 100 can work under different mode, simultaneously through adjusting first data voltage data1 and second data voltage data2, can realize the display luminance of different specifications, obtain higher-order display effect simultaneously, promote display quality.
Referring to fig. 2, fig. 2 is a circuit diagram of a pixel driving circuit according to the present application.
The data input module 101 includes a first transistor T1 and a capacitor C.
The gate of the first transistor T1 is connected to the scan signal scan. The source of the first transistor T1 is connected to the first data signal data 1. The drain of the first transistor T1 is electrically connected to the first node Q. The first end a of the capacitor C is electrically connected to the first node Q. The second terminal b of the capacitor C is grounded.
The adjusting module 102 includes a second transistor T2.
The gate of the second transistor T2 is connected to the first control signal EN. The source of the second transistor T2 is connected to the second data signal data 2. The drain of the second transistor T2 is electrically connected to the first node Q.
The light emitting module 103 includes a third transistor T3, a fourth transistor T4, and a light emitting device D.
The gate of the third transistor T3 is electrically connected to the first node Q. The source of the third transistor T3 is grounded. The drain of the third transistor T3 is electrically connected to the second end n of the light emitting device D. The gate of the fourth transistor T4 is switched on the second control signal EM. The source of the fourth transistor T4 is connected to the supply voltage VDD. The drain of the fourth transistor T4 is electrically connected to the first end m of the light emitting device D.
It should be noted that the specific circuit structures of the data input module 101, the adjusting module 102 and the light emitting module 103 are not limited thereto, and the specific circuit structures are within the scope of the present application as long as the conditions for transmitting the first data signal data1 and the second data signal data2 to the light emitting module 103 in a time-sharing manner can be satisfied.
In the present embodiment, the light emitting device D may be an organic light emitting diode. At this time, the first end m of the light emitting device D is an anode of the organic light emitting diode, and the second end n of the light emitting device D is a cathode of the organic light emitting diode.
In the embodiment, the first transistor T1, the second transistor T2, the third transistor T3, and the fourth transistor T4 are all transistors of the same type, so as to avoid that the difference between the different types of transistors affects the operation performance of the pixel driving circuit 100.
In the following embodiments, the first transistor T1, the second transistor T2, the third transistor T3, and the fourth transistor T4 are all N-type transistors, but the present invention is not limited thereto.
Further, the pixel driving circuit 100 includes a first operation mode and a second operation mode.
Referring to fig. 3, fig. 3 is a signal timing diagram of the pixel driving circuit in fig. 2 in a first operating mode. As shown in fig. 3, in the first operation mode, the first control signal EN is kept at a low level, and the light emitting module 103 emits light according to the first data signal data 1.
Specifically, in the first operation mode, the pixel driving circuit 100 includes a first data writing phase t1 and a first light emitting phase t 2.
In the first data writing period T1, the first control signal EN is low, and the second transistor T2 is turned off. The scan signal scan rises to a high level, the first transistor T1 is turned on, the first data signal data1 is written into the first terminal a of the capacitor C through the first transistor T1, and the potential of the first node Q is pulled high.
In this embodiment, the high potential region of the scan signal scan covers the high potential region of the first data signal data1, so that insufficient charging is avoided, and the display quality is further improved.
In the first light emitting period T2, the first control signal EN is kept at the low level, and the second transistor T2 is kept in an off state. The scan signal T2 falls to low level, and the first transistor T1 is turned off. Since the potential of the first node Q is maintained at the high potential, the third transistor T3 is turned on. At this time, the second control signal EM rises to the high potential, the fourth transistor T4 is turned on, the power voltage VDD is transmitted to the second terminal n of the light emitting device D through the first terminal m of the light emitting device D, and the light emitting device D emits light.
In this embodiment, the luminance of the display device in the first operating mode may be set as the standard luminance, and the luminance specification of the standard luminance may be set according to actual requirements. On the other hand, the first data voltage data1 may be set according to the brightness specification of standard brightness. For example, for an 8-bit display device, if the image data signal is 8 bits and the display screen can represent 256 gray scales, 256 first data voltages data1 need to be obtained according to a fixed voltage division. The specific method of dividing the pressure is well known to those skilled in the art and will not be described herein.
In addition, the first working mode is mainly suitable for night, indoor or outdoor places with dark environment.
Referring to fig. 4, fig. 4 is a timing diagram of a first signal of the pixel driving circuit in fig. 2 in a second operation mode. As shown in fig. 4, in the second operation mode, the first control signal EN is high, and the light emitting module 103 adjusts the light emitting brightness according to the first data signal data1 and the second data signal data 2.
Specifically, in the second operation mode, the driving timing of the pixel driving circuit 100 includes a first data writing phase t1, a first light emitting phase t2, a second data writing phase t3 and a second light emitting phase t 4.
In the first data writing phase T1, the scan signal scan is raised to a high level, the first transistor T1 is turned on, the first data signal data1 is written into the first terminal a of the capacitor C through the first transistor T1, the potential of the first node Q is pulled high, and the third transistor T3 is turned on. The first control signal EN and the second control signal EM are both low, and the second transistor T2 and the fourth transistor T4 are turned off.
In the first light emitting period T2, the scan signal T2 is lowered to low level, and the first transistor T1 is turned off. Since the potential of the first node Q is maintained at the high potential, the third transistor T3 is maintained in an on state. At this time, the second control signal EM rises to the high potential, the fourth transistor T4 is turned on, the power voltage VDD is transmitted to the second terminal n of the light emitting device D through the first terminal m of the light emitting device D, and the light emitting device D emits light.
In the second data writing period T3, the scan signal scan is maintained at a low level, and the first transistor T1 is turned off. The second control signal EM is lowered to the low potential, the fourth transistor T4 is turned off, and the light emitting device D stops emitting light. The first control signal EN rises to the high potential, the second transistor T2 is turned on, the second data signal data2 is written into the first terminal a of the capacitor C through the second transistor T2, the potential of the first node Q is pulled high, and the third transistor T3 is turned on.
In the second light-emitting period T4, the first control signal EN is lowered to low level, and the second transistor T2 is turned off. Since the potential of the first node Q is maintained at the high potential, the third transistor T3 is maintained in an on state. At this time, the second control signal EM rises to the high potential, the fourth transistor T4 is turned on, the power voltage VDD is transmitted to the second terminal n of the light emitting device D through the first terminal m of the light emitting device D, and the light emitting device D emits light.
It should be noted that, since the voltage value of the first data signal data1 and the voltage value of the second data signal data2 are different, the light emitting device D has different light emitting luminances in the first light emitting period t2 and the second light emitting period t 4. However, human eyes are not sensitive to high-frequency signals, so that under the condition of high display picture frequency, the human eyes only see an average brightness, and the phenomenon of picture flicker cannot occur.
Therefore, in the second operation mode, the voltage value of the second data voltage data2 is adjusted, so that the light emitting brightness of the display device can be adjusted to be suitable for different brightness specifications based on the light mixing effect of the first light emitting phase t2 and the second light emitting phase t 4.
Specifically, referring to fig. 4, in the embodiment, the voltage value of the second data voltage data2 is greater than the voltage value of the first data voltage data1, so that the display luminance of the display device in the second operating mode is greater than the display luminance of the display device in the first operating mode.
Therefore, when the display device is placed in an outdoor place where the environment is bright or a high-luminance display screen is required to make the user feel a feeling of immersion, the display device may display a higher luminance through the second data voltage data2 in the second light emitting period t4, thereby improving the overall display luminance of the display device.
Of course, in another embodiment of the present application, the voltage value of the second data voltage data2 may be smaller than the voltage value of the first data voltage data 1.
It can be understood that, in the prior art, since the input voltage of the voltage dividing circuit is a fixed value, the first data voltage data1 generated by the voltage dividing circuit is also fixed. In the case of low gray scale and low brightness, the actually used input voltage interval is small, so that the number of actually used gray scales is reduced, and thus a sufficient first data voltage data1 cannot be obtained, resulting in a reduction in display effect. Therefore, in the second operating mode, a plurality of second data voltages data2 can be set, and the voltage value of the second data voltage data2 is smaller than the voltage value of the first data voltage data1, so that more low gray levels can be obtained by adjusting the brightness of the emitted light, and the picture effect presented by the display device is more fine and smooth.
Further, in the present embodiment, the time length Δ t4 of the second light emitting period t4 is equal to the time length Δ t1 of the first light emitting period t 1. The present embodiment simply adjusts the light emitting brightness by changing the voltage value of the second data signal data2, simplifying the signal timing.
In another embodiment of the present application, referring to fig. 5, fig. 5 is a second signal timing diagram of the pixel driving circuit in fig. 2. The difference from the first signal timing diagram shown in fig. 4 is that, in the present embodiment, the time length Δ t4 of the second light-emitting period t4 is greater than the time length Δ t1 of the first light-emitting period t 1. That is, according to the principle that the human eye senses the brightness as an integral over time, the ratio of the time length Δ t4 of the second lighting period t4 to the time length Δ t1 of the first lighting period t1 can be adjusted to make the display device display different gray-scale brightness.
In the embodiment, the voltage value of the second data voltage data2, the time duration Δ t1 of the first light-emitting period t1, and the time duration Δ t4 of the second light-emitting period t4 are adjusted simultaneously, so that the light-emitting brightness can be adjusted more flexibly, and a higher-order display effect can be obtained.
In an embodiment of the present application, the number of the second data voltages data2 may be greater than or equal to the number of the first data voltages data 1.
Specifically, if it is only necessary to increase the light emitting brightness of the display device, the voltage value of the second data voltage data2 is set to be greater than the voltage value of the first data voltage data1, and the number of the second data voltages data2 is equal to the number of the first data voltages data 1.
If the brightness and the number of gray scales of the display device need to be increased simultaneously (for example, the display device is changed from 8 bits to 10 bits), the number of the second data voltages data2 is greater than the number of the first data voltages data1, that is, the display device displays different brightness by combining the plurality of second data voltages data2 with the corresponding first data voltages data1, so as to obtain a higher-order display effect.
In addition, the pixel driving circuit 100 provided in the present application can be used in a MiniLED display panel or an OLED (organic light-Emitting Diode) display panel.
It should be noted that the transistors in the pixel driving circuit 100 provided in the present application may be low-temperature polysilicon thin film transistors, oxide semiconductor thin film transistors, or amorphous silicon thin film transistors, which is not specifically limited in the present application.
Accordingly, the present application further provides a display device, which includes the pixel driving circuit described in any of the above embodiments, and the pixel driving circuit can refer to the above contents specifically, which is not described herein again. In addition, the display device may be a smart phone, a tablet computer, an electronic book reader, a smart watch, a camera, a game machine, and the like, which is not limited in this application.
The application provides a pixel driving circuit and a display device, wherein the pixel driving circuit comprises a data input module, an adjusting module and a light emitting module; the data input module is accessed to a scanning signal and a first data signal and is used for outputting the first data signal to the light-emitting module under the control of the scanning signal; the adjusting module is connected to a first control signal and a second data signal and used for outputting the second data signal to the light-emitting module under the control of the first control signal; the light emitting module is connected to the first data signal, the second data signal, the power voltage and the second control signal, and is used for adjusting the light emitting brightness according to the first data signal and the second data signal under the control of the second control signal. This application is enough to adjust display device's demonstration luminance, obtains higher-order display effect, promotes the display quality.
The pixel driving circuit and the display device provided by the embodiments of the present application are described in detail above, and the principles and embodiments of the present application are explained herein by applying specific examples, and the above description of the embodiments is only used to help understanding the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
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| CN202011154381.0A CN112201200A (en) | 2020-10-26 | 2020-10-26 | Pixel driving circuit and display device |
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| CN202011154381.0A CN112201200A (en) | 2020-10-26 | 2020-10-26 | Pixel driving circuit and display device |
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| CN113012632A (en) * | 2021-02-25 | 2021-06-22 | Oppo广东移动通信有限公司 | Screen brightness adjusting method and device, storage medium and electronic equipment |
| CN113707094A (en) * | 2021-08-25 | 2021-11-26 | 京东方科技集团股份有限公司 | Display panel, driving circuit and driving method of display panel |
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