CN117351875A - Pixel circuit and display panel using same - Google Patents
Pixel circuit and display panel using same Download PDFInfo
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- CN117351875A CN117351875A CN202311432639.2A CN202311432639A CN117351875A CN 117351875 A CN117351875 A CN 117351875A CN 202311432639 A CN202311432639 A CN 202311432639A CN 117351875 A CN117351875 A CN 117351875A
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- 238000001514 detection method Methods 0.000 claims description 14
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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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]
-
- 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
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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]
- G09G3/3266—Details of drivers for scan electrodes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0243—Details of the generation of driving signals
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The application discloses a pixel circuit and a display panel using the same. The pixel circuit is coupled to a control circuit. The pixel circuit includes: a write circuit for receiving a data signal and a gate control signal; a driving circuit coupled to the writing circuit; and a light emitting element coupled to the driving circuit. In a data writing stage, the grid control signal turns on the writing circuit, the data signal is written into the driving circuit through the writing circuit, the control circuit is turned off by a light emitting control signal, and the light emitting element does not emit light; and in a light-emitting stage, the grid control signal enables the write circuit to be closed, and the light-emitting control signal enables the control circuit to be conducted, so that the light-emitting element emits light.
Description
Technical Field
The invention relates to a pixel circuit and a display panel using the same.
Background
Micro LEDs (Micro LEDs) are excellent in bending, stretching, and other properties because of small crystal grains. In addition, the micro LED panel has the advantages of high resolution, high transparency and the like because more small grains can be accommodated. In addition, a single Micro LED has high brightness, and can achieve the effect of saving electricity.
However, in order to improve the performance of the Micro LED display panel, how to increase the aperture ratio and further improve the image definition is one of the efforts in the industry.
Disclosure of Invention
According to an aspect of the present disclosure, a pixel circuit coupled to a control circuit is provided, the pixel circuit comprising: a write circuit for receiving a data signal and a gate control signal; a driving circuit coupled to the writing circuit; and a light emitting element coupled to the driving circuit. In a data writing stage, the grid control signal turns on the writing circuit, the data signal is written into the driving circuit through the writing circuit, the control circuit is turned off by a light emitting control signal, and the light emitting element does not emit light; and in a light-emitting stage, the grid control signal enables the write circuit to be closed, and the light-emitting control signal enables the control circuit to be conducted, so that the light-emitting element emits light.
According to another aspect of the present disclosure, there is provided a display panel including: an active region including a plurality of pixel circuits, each of the pixel circuits including: a write circuit receiving one of a plurality of data signals and one of a plurality of gate control signals, a driving circuit coupled to the write circuit, and a light emitting element coupled to the driving circuit; and at least one control circuit coupled to the active region, wherein the pixel circuits share the at least one control circuit. In a data writing stage, the gate control signals conduct the writing circuits of the pixel circuits, the data signals are sequentially written into the driving circuits of the pixel circuits through the writing circuits of the pixel circuits, the at least one control circuit is turned off by a light emitting control signal, and the light emitting elements of the pixel circuits do not emit light; and in a light-emitting stage, the grid control signals enable the writing circuits of the pixel circuits to be closed, and the light-emitting control signals enable the at least one control circuit to be conducted, so that the light-emitting elements of the pixel circuits emit light.
For a better understanding of the above and other aspects of the invention, reference will now be made in detail to the following examples, examples of which are illustrated in the accompanying drawings.
Drawings
Fig. 1 shows functional blocks and circuit diagrams of a pixel circuit according to an embodiment of the present disclosure.
Fig. 2 shows a schematic diagram of a display panel according to an embodiment of the disclosure.
Fig. 3 is a schematic view illustrating an operation of a display panel according to an embodiment of the present disclosure.
Reference numerals illustrate:
100: the pixel circuit 110: write circuit
120: the driving circuit 130: detection circuit
C: capacitance 140: light-emitting element
150: control circuit
T1 to T4: transistor with a high-voltage power supply
200: display panel 210: active region
220: pixel circuit
P1 to P2: stage(s)
Detailed Description
Technical terms in the present specification are terms commonly used in the art, and a part of the terms are described or defined as the present specification, and the explanation of the part of the terms is based on the description or the definition of the present specification. Various embodiments of the present disclosure each have one or more technical features. Those skilled in the art may selectively implement some or all of the features of any of the embodiments, or may selectively combine some or all of the features of any of the embodiments, as the implementation may be possible.
Fig. 1 shows functional blocks and circuit diagrams of a pixel circuit according to an embodiment of the present disclosure. The pixel circuit 100 according to an embodiment of the present disclosure may be applied to, for example, but not limited to, a micro LED display panel. The pixel circuit 100 according to an embodiment of the present disclosure includes: write circuit 110, drive circuit 120, detection circuit 130, capacitor C, and light emitting element 140. Wherein the detection circuit 130 is a selective element. The pixel circuit 100 of an embodiment of the present disclosure is coupled to the control circuit 150 of the display panel.
Write circuit 110 includes, for example, but is not limited to, a transistor T1. The transistor T1 has: a first terminal receiving the DATA signal DATA, a second terminal, and a control terminal receiving the gate control signal SN.
The driving circuit 120 is coupled to the writing circuit 110. The driving circuit 120 includes, for example, but is not limited to, a transistor T2. The transistor T2 has: a first terminal receiving the operating voltage VDD, a second terminal, and a control terminal coupled to the second terminal of the transistor T1.
The detection circuit 130 is coupled to the driving circuit 120. The detection circuit 130 includes, for example, but is not limited to, a transistor T3. The transistor T3 has: a first terminal receiving the DATA signal DATA, a second terminal, and a control terminal receiving the test signal AT.
The capacitor C is coupled to the driving circuit 120. The capacitor C is coupled between the operating voltage VDD and the second terminal of the transistor T1, or between the first terminal of the transistor T2 and the control terminal of the transistor T2, for stabilizing the gate-source voltage of the transistor T2. Further, the capacitor C is used to store the DATA signal DATA.
The light emitting element 140 is coupled to the driving circuit 120. The light emitting element 140 includes an LED, such as, but not limited to, a micro LED. The LED of the light emitting element 140 is coupled between the second terminal of the transistor T2 and a terminal VSS'.
The control circuit 150 is coupled to the light emitting element 140. The control circuit 150 includes, for example, but is not limited to, a transistor T4. The transistor T4 has: a first terminal coupled to the ground terminal VSS, a second terminal coupled to the LED of the light emitting device 140, and a control terminal connected to the light control signal EM.
In one embodiment of the present disclosure, the pixel circuit 100 has 2 phases of operation: a data writing stage (first stage) and a light emitting stage (second stage). The transistor T3 is used for detection, and the transistor T3 is turned off in both the data writing stage (first stage) and the light emitting stage (second stage). During the detection phase, the transistor T3 is turned on.
In the DATA writing stage (first stage), the gate control signal SN turns on the transistor T1, so that the DATA signal DATA is written into the control terminal of the transistor T2 through the transistor T1, the light emitting control signal EM turns off the transistor T4, the test signal AT turns off the transistor T3, and the on or off of the transistor T2 is determined by the DATA signal DATA, but since the transistor T4 is turned off, the LED of the light emitting element 140 does not emit light.
In the light emitting stage (second stage), the transistor T1 is turned off by the gate control signal SN, the transistor T3 is also turned off by the test signal AT, the transistor T4 is turned on by the light emitting control signal EM, and the LED of the light emitting element 140 emits light (has current passing through).
Fig. 2 shows a schematic diagram of a display panel according to an embodiment of the disclosure. As shown in fig. 2, a display panel 200 according to an embodiment of the present disclosure includes: the active region 210 and at least one control circuit 150. Although fig. 2 shows only 2 control circuits 150, the present disclosure is not limited thereto.
The active region 210 includes a plurality of pixel circuits 220. The pixel circuits 220 are arranged in a matrix. Compared to the pixel circuit 100 of fig. 1, the pixel circuit 220 of fig. 2 has fewer detection circuits 130. Therefore, the circuit architecture of the pixel circuit 220 of fig. 2 and the detailed description thereof are omitted herein. In fig. 2, the control terminal (Gate) of the transistor T1 of the pixel circuit 220 receives one of the Gate control signals Gate 1 to Gate n, and the first terminal of the transistor T1 of the pixel circuit 220 receives one of the Data signals Data 1 to Data n.
Since the detection circuit 130 is an optional element, in other possible embodiments of the present disclosure, the plurality of pixel circuits included in the active region 210 may also be substantially the same as the pixel circuit 100 of fig. 1 (i.e., including the detection circuit 130), which is within the scope of the present disclosure.
The pixel circuits 220 share the at least one control circuit 150.
Fig. 3 is a schematic view illustrating an operation of a display panel according to an embodiment of the present disclosure.
In the Data writing stage (first stage) P1, the Gate control signals Gate 1 to Gate n turn on the transistors T1 of the pixel circuits, so that the Data signals Data 1 to Data n are sequentially written to the control terminals of the transistors T2 of the pixel circuits through the transistors T1 of the pixel circuits, and the control terminal voltages VG1n to VGnn of the transistors T2 of the pixel circuits are affected by the Data signals Data 1 to Data n, respectively. In addition, in the data writing stage (first stage) P1, the light emission control signal EM at this time makes the at least one transistor T4 of the at least one control circuit 150 turned off. Since the transistor T4 of the at least one control circuit 150 is turned off, the LEDs of the light emitting elements of the pixel circuits 220 will not emit light at this time.
In the light emitting stage (second stage), the Gate control signals Gate 1 to Gate n turn off the transistors T1 of the pixel circuits 220, and the light emitting control signal EM turns on the transistor T4 of the at least one control circuit 150, so that the LEDs of the light emitting elements of the pixel circuits 220 emit light (have current passing through).
As can be seen from the above, in the pixel circuit and the display panel using the same according to an embodiment of the disclosure, the active area can greatly reduce the required wiring, so that the aperture ratio can be improved (e.g., 12% can be improved), thereby improving the definition of the display image.
In summary, although the present invention has been described in terms of the above embodiments, it is not limited thereto. Those skilled in the art to which the invention pertains will appreciate that numerous variations and modifications can be made without departing from the spirit and scope of the invention. Accordingly, the scope of the invention is defined by the appended claims.
Claims (6)
1. A pixel circuit coupled to a control circuit, the pixel circuit comprising:
a write circuit for receiving a data signal and a gate control signal;
a driving circuit coupled to the writing circuit; and
a light emitting device coupled to the driving circuit,
wherein,
in a data writing stage, the grid control signal turns on the writing circuit, the data signal is written into the driving circuit through the writing circuit, the control circuit is turned off by a light emitting control signal, and the light emitting element does not emit light; and
in a light emitting stage, the gate control signal turns off the write circuit, and the light emitting control signal turns on the control circuit to make the light emitting element emit light.
2. The pixel circuit of claim 1, wherein,
the write circuit includes a first transistor having: a first end receiving the data signal, a second end, and a control end receiving the gate control signal;
the driving circuit includes a second transistor having: a first terminal receiving an operating voltage, a second terminal, and a control terminal coupled to the second terminal of the first transistor; and
the light emitting element comprises a micro LED coupled between the second end and an end point of the second transistor.
3. The pixel circuit of claim 2, further comprising:
a detection circuit coupled to the driving circuit, the detection circuit including a third transistor having: a first end receiving the data signal, a second end, and a control end receiving a test signal, the test circuit being turned on during a test phase; and
and a capacitor coupled between the operating voltage and the second terminal of the first transistor for stabilizing a gate-source voltage of the second transistor, and for storing the data signal.
4. A display panel, comprising:
an active region including a plurality of pixel circuits, each of the pixel circuits including: a write circuit receiving one of a plurality of data signals and one of a plurality of gate control signals, a driving circuit coupled to the write circuit, and a light emitting element coupled to the driving circuit; and
at least one control circuit coupled to the active region, the pixel circuits sharing the at least one control circuit,
wherein,
in a data writing stage, the gate control signals conduct the writing circuits of the pixel circuits, the data signals are sequentially written into the driving circuits of the pixel circuits through the writing circuits of the pixel circuits, the at least one control circuit is turned off by a light emitting control signal, and the light emitting elements of the pixel circuits do not emit light; and
in a light emitting stage, the gate control signals enable the write circuits of the pixel circuits to be turned off, and the light emitting control signals enable the at least one control circuit to be turned on, so that the light emitting elements of the pixel circuits emit light.
5. The display panel of claim 4, wherein, for each of the pixel circuits,
the write circuit includes a first transistor having: a first end receiving one of the data signals, a second end, and a control end receiving one of the gate control signals;
the driving circuit includes a second transistor having: a first terminal receiving an operating voltage, a second terminal, and a control terminal coupled to the second terminal of the first transistor; and
the light emitting element comprises a micro LED coupled between the second end and an end point of the second transistor.
6. The display panel of claim 5, wherein each of the pixel circuits further comprises:
a detection circuit coupled to the driving circuit, the detection circuit including a third transistor having: a first end receiving one of the data signals, a second end, and a control end receiving a test signal, the test circuit being turned on during a test phase; and
and a capacitor coupled between the operating voltage and the second terminal of the first transistor for stabilizing a gate-source voltage of the second transistor, and for storing one of the data signals.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW112120876A TWI852604B (en) | 2023-06-05 | Pixel circuit and display panel using the same | |
| TW112120876 | 2023-06-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117351875A true CN117351875A (en) | 2024-01-05 |
Family
ID=89369144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311432639.2A Pending CN117351875A (en) | 2023-06-05 | 2023-10-31 | Pixel circuit and display panel using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117351875A (en) |
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2023
- 2023-10-31 CN CN202311432639.2A patent/CN117351875A/en active Pending
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