CN112086070A - Pixel driving circuit and display panel - Google Patents
Pixel driving circuit and display panel Download PDFInfo
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- CN112086070A CN112086070A CN202010980993.9A CN202010980993A CN112086070A CN 112086070 A CN112086070 A CN 112086070A CN 202010980993 A CN202010980993 A CN 202010980993A CN 112086070 A CN112086070 A CN 112086070A
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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
- 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]
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- 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)
- Control Of El Displays (AREA)
Abstract
The application discloses a pixel driving circuit and a display panel, wherein the pixel driving circuit comprises a driving transistor, a first transistor, a second transistor, a storage capacitor and a voltage division capacitor; by presetting the electric potential of the grid electrode, the drain electrode and the source electrode of the driving transistor before light emission, the light-emitting current flowing through the driving transistor can not be influenced by the threshold voltage of the driving transistor during light emission, and the phenomenon of uneven light emission caused by the drift of the threshold voltage is eliminated.
Description
Technical Field
The application relates to the technical field of display, in particular to the technical field of driving circuits, and particularly relates to a pixel driving circuit and a display panel.
Background
With the development of display technology, the demand for display quality is increasing, and it is urgently needed to meet the requirements of high-frequency dynamic picture display (smoother image quality) and low power consumption of ordinary display, so that a dynamic frame frequency technology is developed, and the requirements of a display panel for ultra-low frequency (1 to 5Hz) and ultra-high frequency (120 to 360Hz) can be met at the same time. With the consequent increase in the requirements for the display area: the charging capability is strong: the charging time of each line in the high-frequency state is extremely short; strong picture Holding (Holding) capability: the Holding time per frame for the low frequency state is extended.
Low Temperature Polycrystalline Oxide (LTPO) combines the advantages of Low temperature poly-silicon (LTPS) and Indium Gallium Zinc Oxide (IGZO) technologies. The pixel driving circuit adopting the low-temperature polycrystalline oxide type thin film transistor has the characteristics of strong driving capability and low power consumption, and is a good technology in the display field at present.
However, the driving transistor in the conventional pixel driving circuit is affected by the factors such as the self-process, the circuit design, etc., and the threshold voltage of the driving transistor often drifts, so that the light emission of the display area is not uniform, which affects the application effect of the LTPO type thin film transistor in the dynamic frame rate technology field.
Disclosure of Invention
The application provides a pixel driving circuit and a display panel, which solve the problem of uneven light emission caused by the drift of the threshold voltage of a driving transistor.
In a first aspect, the present application provides a pixel driving circuit, which includes a driving transistor, a first transistor, a second transistor, a storage capacitor, and a voltage dividing capacitor; the driving transistor is connected in series with a light-emitting loop formed by a first power supply signal and a second power supply signal and is used for controlling the current flowing through the light-emitting loop; the first transistor is connected with the drain electrode of the driving transistor and used for compensating the drain electrode potential of the driving transistor with an initial signal according to a first scanning signal; the second transistor is connected with the grid electrode of the driving transistor and used for writing a data signal according to a second scanning signal and accessing a reference signal so as to reset the grid electrode potential and the source electrode potential of the driving transistor; the storage capacitor is connected between the grid electrode of the driving transistor and the source electrode thereof in series and is used for storing the grid electrode potential of the driving transistor; and the voltage division capacitor is connected between the source electrode of the driving transistor and the first power supply signal in series and used for adjusting the grid potential of the driving transistor.
Based on the first aspect, in a first implementation manner of the first aspect, a channel type of the driving transistor is different from a channel type of the first transistor; and a channel material of the driving transistor is different from a channel material of the first transistor and a channel material of the second transistor.
In a second implementation form of the first aspect, based on the first implementation form of the first aspect, the channel type of the first transistor and the channel type of the second transistor are different; and the channel material of the first transistor and the channel material of the second transistor are the same.
In a third implementation manner of the first aspect, based on the second implementation manner of the first aspect, the pixel driving circuit further comprises a first light-emitting control transistor; one of a source/drain of the first light emitting control transistor is connected with a first power supply signal; the other of the source/drain of the first light emission control transistor is connected to the source of the drive transistor; the gate of the first light emission control transistor is connected to the first light emission control signal.
In a fourth implementation form of the first aspect, based on the third implementation form of the first aspect, the pixel driving circuit further comprises a second emission control transistor; one of a source/drain of the second light emission control transistor is connected to the drain of the driving transistor; the gate of the second light emission control transistor is connected to a second light emission control signal.
In a fifth implementation form of the first aspect, in the fourth implementation form of the first aspect, the pixel driving circuit further comprises at least one light emitting device; the other of the source/drain of the second light emission controlling transistor is connected to an anode of the light emitting device; the cathode of the light emitting device is connected to a second power signal.
In a sixth implementation manner of the first aspect, based on the fifth implementation manner of the first aspect, the channel type of the driving transistor is the same as the channel type of the first light emission control transistor and the channel type of the second light emission control transistor; and a channel material of the driving transistor is the same as a channel material of the first light emission control transistor and a channel material of the second light emission control transistor.
In a seventh implementation manner of the first aspect, based on the sixth implementation manner of the first aspect, the driving transistor is a P-type channel polycrystalline silicon thin film transistor; the first transistor is a P-type channel polycrystalline oxide thin film transistor; the second transistor is an N-type channel polycrystalline oxide thin film transistor.
In an eighth implementation form of the first aspect as any of the implementation forms of the first aspect, the potential of the first power supply signal is higher than the potential of the second power supply signal; and the first power signal, the second power signal and the initial signal are all constant voltage signals.
In a second aspect, the present application provides a display panel including at least one pixel driving circuit of any one of the above embodiments.
According to the pixel driving circuit and the display panel, the electric potential is preset on the grid electrode, the drain electrode and the source electrode of the driving transistor before light emitting, so that the light emitting current flowing through the driving transistor can not be influenced by the threshold voltage of the driving transistor when the light emitting is carried out, and the phenomenon of uneven light emitting caused by the drift of the threshold voltage is eliminated.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic circuit diagram of a pixel driving circuit according to an embodiment of the present disclosure.
Fig. 2 is a signal flow diagram illustrating the pixel driving circuit in fig. 1 during a reset phase.
Fig. 3 is a signal flow diagram illustrating the pixel driving circuit in fig. 1 operating in a compensation phase.
Fig. 4 is a signal flow diagram illustrating the pixel driving circuit in fig. 1 during a writing phase.
Fig. 5 is a signal flow diagram illustrating the pixel driving circuit in fig. 1 operating in a light-emitting stage.
FIG. 6 is a timing diagram of the pixel driving circuit shown in FIG. 1.
FIG. 7 is another timing diagram of the pixel driving circuit of FIG. 1.
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. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1 to 7, the present embodiment provides a pixel driving circuit, which includes a driving transistor T2, a first transistor T4, a second transistor T3, a storage capacitor C1, and a voltage dividing capacitor C2; the driving transistor T2 is connected in series to a light emitting loop formed by the first power signal VDD and the second power signal VSS, and is configured to control a current flowing through the light emitting loop; the first transistor T4 is connected to the drain of the driving transistor T2 for compensating the drain potential of the driving transistor T2 with an initial signal Vint according to the first SCAN signal SCAN 2; the second transistor T3 is connected to the gate of the driving transistor T2, for writing the data signal Vdata according to the second SCAN signal SCAN1 and turning on the reference signal Ref to reset the gate potential of the driving transistor T2 and the source potential thereof; the storage capacitor C1 is connected in series between the gate of the driving transistor T2 and the source thereof, and is used for storing the gate potential of the driving transistor T2; and the voltage dividing capacitor C2 is connected in series between the source of the driving transistor T2 and the first power signal VDD, and is used for adjusting the gate potential of the driving transistor T2. One of the source/drain electrodes of the first transistor T4 is connected to the drain electrode of the driving transistor T2; the other of the source/drain of the first transistor T4 is connected to the initial signal Vint.
As shown in fig. 1, in one embodiment, the pixel driving circuit further includes a first light emission controlling transistor T1, a second light emission controlling transistor T5, and at least one light emitting device LED.
Specifically, one of the source/drain electrodes of the first light emission controlling transistor T1 is connected to the first power supply signal VDD; the other of the source/drain of the first light emitting control transistor T1 is connected to the source of the driving transistor T2; the gate of the first light emission control transistor T1 is connected to the first light emission control signal EM 1. One of the source/drain electrodes of the second light emission controlling transistor T5 is connected to the drain electrode of the driving transistor T2; the gate of the second emission control transistor T5 is connected to a second emission control signal EM 2. The other of the source/drain of the second light emission controlling transistor T5 is connected to the anode of the light emitting device LED; the cathode of the light emitting device LED is connected to a second power signal VSS.
Note that the potential of the first power supply signal VDD is higher than the potential of the second power supply signal VSS. The first power signal VDD, the second power signal VSS, and the initial signal Vint are all constant voltage signals.
The light emitting device LED may be, but not limited to, an OLED, and may also be a self-emitting device such as a micro LED or a MiniLED.
In one embodiment, the channel type of the driving transistor T2 is different from the channel type of the second transistor T3; and a channel material of the driving transistor T2 is different from a channel material of the first transistor T4 and a channel material of the second transistor T3. The channel type of the first transistor T4 and the channel type of the second transistor T3 are different; and the channel material of the first transistor T4 and the channel material of the second transistor T3 are the same. In one embodiment, the channel type of the driving transistor T2 is the same as the channel type of the first light emission controlling transistor T1 and the channel type of the second light emission controlling transistor T5; and a channel material of the driving transistor T2 is the same as a channel material of the first light emission controlling transistor T1 and a channel material of the second light emission controlling transistor T5.
Specifically, the driving transistor T2, the first light emitting control transistor T1, and the second light emitting control transistor T5 may be, but not limited to, P-channel polysilicon thin film transistors, and may also be P-channel low temperature polysilicon thin film transistors. The P-channel type first transistor T4 and the N-channel type second transistor T3 may be, but not limited to, polycrystalline oxide thin film transistors, low temperature polycrystalline oxide thin film transistors, or low temperature polycrystalline metal oxide thin film transistors.
As can be seen from the above description of the pixel driving circuit provided by the present disclosure, the pixel driving circuit provided by the present disclosure only employs at most 5 thin film transistors, and compared with a pixel driving circuit having a larger number of thin film transistors, the pixel driving circuit provided by the present disclosure can effectively improve the yield in the manufacturing process.
The pixel driving circuit provided by the present disclosure is divided into the following working stages:
reset phase Rst: the first emission control signal EM1 is at a low potential, the second emission control signal EM2 is at a high potential, the first SCAN signal SCAN2 is at a high potential, and the second SCAN signal SCAN1 is at a high potential, at this time, the first emission control transistor T1 and the second transistor T3 are turned on, and the reference signal Ref resets the gate potential of the driving transistor T2; meanwhile, the first power supply signal VDD resets the source potential of the driving transistor T2 through the first light emitting control transistor T1. The arrows shown in fig. 2 indicate the signal flow direction of the pixel driving circuit in the reset period Rst.
Compensation phase Pgm: the first emission control signal EM1 is at a high potential, the second emission control signal EM2 is at a high potential, the first SCAN signal SCAN2 is at a low potential, and the second SCAN signal SCAN1 is at a low potential and a high potential in sequence, at this time, the first emission control transistor T1 and the second emission control transistor T5 are both turned off, the first transistor T4 is turned on, the second transistor T3 is turned on after being turned off, the source potential of the driving transistor T2 leaks electricity to the drain thereof, and the initial signal Vint compensates the drain potential of the driving transistor T2 through the first transistor T4 until the potential difference between the gate and the source of the driving transistor T2 is equal to the threshold voltage of the driving transistor T2. The arrows shown in fig. 3 indicate the signal flow direction of the pixel driving circuit during the compensation phase Pgm.
Writing stage WR: when the first emission control signal EM1 is at a high potential, the second emission control signal EM2 is at a high potential, the first SCAN signal SCAN2 is at a high potential, and the second SCAN signal SCAN1 is at a high potential, the second transistor T3 is turned on, and the data signal Vdata is written into the gate of the driving transistor T2. The arrows shown in fig. 4 indicate the signal flow direction of the pixel driving circuit in the writing period WR.
And (3) luminescence phase EM: the first emission control signal EM1 is at a low potential, the second emission control signal EM2 is at a low potential, the first SCAN signal SCAN2 is at a high potential, and the second SCAN signal SCAN1 is at a low potential, at this time, the first emission control transistor T1, the second emission control transistor T5, and the driving transistor T2 are all turned on, the light emitting circuit is turned on, and the driving transistor T2 controls the current flowing through the light emitting circuit, so as to drive the light emitting device LED to emit light with a corresponding brightness. The arrows shown in fig. 5 indicate the signal flow of the pixel driving circuit in the emission phase EM.
The main node voltage of the driving transistor T2 corresponding to each operation stage is shown in the following table:
g, S, D and Vgs are respectively the gate potential, the source potential, the drain potential and the potential difference between the gate and the source of the driving transistor T2 in sequence; vref is the potential of the reference signal Ref; vth is the threshold voltage of the driving transistor T2; vdd is the potential of the first power supply signal Vdd; v1 is the potential of the initial signal Vint; vdata here is the potential of the data signal; k ═ C1/(C1+ C2), where C1 is the capacitance of the storage capacitor and C2 is the capacitance of the voltage-dividing capacitor. Then, the magnitude of the light emission current I in the light emission phase is:
I＝(m·u·W)/2L*((Vdata-Vref+V1)*(1-K))2
wherein, m, u, W and L in the above formula are relative constants and are not described in detail. As can be seen from the formula, the magnitude of the light emitting current I is independent of the threshold voltage of the driving transistor T2, so that the pixel driving circuit provided by the present application can be free from the influence of the threshold voltage of the driving transistor T2, which is beneficial to uniform light emission of the display region.
In the above working process, the gate of the driving transistor T2 fixedly seals the source of the driving transistor T2, the source of the driving transistor T2 is leaked to Vgs which is Vth by means of simultaneous bottom-mounting of the gate and the drain of the driving transistor T2, and compensation is completed, and then the data signal Vdata can be written into the gate and the source of the driving transistor T2 by the matching of the storage capacitor C1 and the voltage-dividing capacitor C2, so that the regulation of the potential difference Vgs between the gate and the source of the driving transistor T2 is realized, and the current source function in the Vth compensation state is further realized. On this basis, the first transistor T4 and the second transistor T3 connected to the gate of the driving transistor T2 are replaced by low-temperature poly-oxide thin film transistors with lower leakage current, so that the holding time of the gate level of the driving transistor T2 can be further prolonged, the display with ultralow frequency and low power consumption can be realized, and better visual experience can be achieved.
In one embodiment, the pixel driving circuit provided by the present disclosure, the second SCAN signal SCAN1 and the second emission control signal EM2 may selectively share one control signal, which may be the second SCAN signal SCAN1 or the second emission control signal EM2, so that one input signal line may be saved for the pixel driving circuit. Moreover, when the pulse widths of the first emission control signal EM1 and the second emission control signal EM2 are not consistent as shown in fig. 6, two different emission driving circuits (EM GOAs) are required to provide the corresponding emission control signals, respectively; as shown in fig. 7, when the pulse widths of the first emission control signal EM1 and the second emission control signal EM2 are the same, the first emission control signal EM1 and the second emission control signal EM2 may share a set of emission driving circuits, for example, the first emission control signal EM1 may adopt the second emission control signal EM2 of the next row/the scanning signal of the next row, so that a set of emission driving circuits may be saved, and the frame space may be effectively saved; at least one input signal line or two input signal lines can be reduced, and the layout space of the signal lines in the display area can be further optimized.
In one embodiment, the present application provides a display panel including at least one pixel driving circuit of any one of the above embodiments.
The display panel may include a plurality of pixel driving circuits including a plurality of light emitting device LEDs, the plurality of light emitting device LEDs being distributed in an array on the display panel.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The pixel driving circuit and the display panel provided in the embodiments of the present application are described in detail above, and a specific example is applied in the description to explain the principle and the implementation of the present application, and the description of the embodiments above is only used to help understanding the technical solution and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A pixel driving circuit, comprising:
the driving transistor is connected in series with a light emitting loop formed by a first power supply signal and a second power supply signal and is used for controlling the current flowing through the light emitting loop;
a first transistor connected to a drain of the driving transistor for compensating a drain potential of the driving transistor with an initial signal according to a first scan signal;
a second transistor connected to a gate of the driving transistor, for writing a data signal according to a second scan signal and accessing a reference signal to reset a gate potential of the driving transistor and a source potential thereof;
the storage capacitor is connected between the grid electrode of the driving transistor and the source electrode of the driving transistor in series and used for storing the grid electrode potential of the driving transistor; and
and the voltage division capacitor is connected between the source electrode of the driving transistor and the first power supply signal in series and used for adjusting the grid potential of the driving transistor.
2. The pixel driving circuit according to claim 1, wherein a channel type of the driving transistor is different from a channel type of the second transistor; and a channel material of the driving transistor is different from a channel material of the first transistor and a channel material of the second transistor.
3. The pixel driving circuit according to claim 2, wherein a channel type of the first transistor and a channel type of the second transistor are different; and the channel material of the first transistor and the channel material of the second transistor are the same.
4. The pixel driving circuit according to claim 3, further comprising a first light emission control transistor;
one of a source/drain of the first light emitting control transistor is connected with the first power supply signal; the other of the source/drain of the first light emission control transistor is connected to the source of the driving transistor; and the grid electrode of the first light-emitting control transistor is connected with a first light-emitting control signal.
5. The pixel driving circuit according to claim 4, further comprising a second emission control transistor;
one of a source/drain of the second light emission control transistor is connected to the drain of the driving transistor; and the grid electrode of the second light-emitting control transistor is connected with a second light-emitting control signal.
6. The pixel driving circuit according to claim 5, further comprising at least one light emitting device;
the other of the source/drain of the second light emission controlling transistor is connected to an anode of the light emitting device; the cathode of the light emitting device is connected with the second power signal.
7. The pixel driving circuit according to claim 6, wherein a channel type of the driving transistor is the same as a channel type of the first emission control transistor and a channel type of the second emission control transistor; and a channel material of the driving transistor is the same as a channel material of the first emission control transistor and a channel material of the second emission control transistor.
8. The pixel driving circuit according to claim 3, wherein the driving transistor is a P-channel polysilicon thin film transistor; and the first transistor is a P-type channel polycrystalline oxide thin film transistor; the second transistor is an N-type channel polycrystalline oxide thin film transistor.
9. The pixel driving circuit according to any one of claims 1 to 8, wherein a potential of the first power supply signal is higher than a potential of the second power supply signal; and the first power signal, the second power signal and the initial signal are all constant voltage signals.
10. A display panel comprising at least one pixel driving circuit as claimed in any one of claims 1 to 9.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112802429A (en) * | 2021-03-12 | 2021-05-14 | 深圳市华星光电半导体显示技术有限公司 | Pixel driving circuit and display panel |
| CN114627803A (en) * | 2022-03-25 | 2022-06-14 | 武汉华星光电技术有限公司 | Display panel, pixel driving circuit and display device |
| WO2023087486A1 (en) * | 2021-11-16 | 2023-05-25 | 武汉华星光电半导体显示技术有限公司 | Pixel circuit and display apparatus |
| WO2024000701A1 (en) * | 2022-06-29 | 2024-01-04 | 武汉华星光电半导体显示技术有限公司 | Pixel circuit and display panel |
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| WO2024000701A1 (en) * | 2022-06-29 | 2024-01-04 | 武汉华星光电半导体显示技术有限公司 | Pixel circuit and display panel |
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