CN115050307A - Pixel driving circuit and display panel - Google Patents

Pixel driving circuit and display panel Download PDF

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Publication number
CN115050307A
CN115050307A CN202210840246.4A CN202210840246A CN115050307A CN 115050307 A CN115050307 A CN 115050307A CN 202210840246 A CN202210840246 A CN 202210840246A CN 115050307 A CN115050307 A CN 115050307A
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CN
China
Prior art keywords
circuit
light
control circuit
emitting
emitting control
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Pending
Application number
CN202210840246.4A
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Chinese (zh)
Inventor
周仁杰
刘常富
郑浩旋
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HKC Co Ltd
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HKC Co Ltd
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Application filed by HKC Co Ltd filed Critical HKC Co Ltd
Priority to CN202210840246.4A priority Critical patent/CN115050307A/en
Publication of CN115050307A publication Critical patent/CN115050307A/en
Pending legal-status Critical Current

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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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

The application provides a pixel driving circuit and a display panel, which relate to the technical field of display, wherein the pixel driving circuit comprises a data input circuit, an energy storage circuit, a first light-emitting control circuit and a second light-emitting control circuit; the data input circuit is connected with the control end of the first light-emitting control circuit and used for outputting data voltage to the first light-emitting control circuit; the energy storage circuit is connected between the control end and the input end of the first light-emitting control circuit and used for storing electric energy; the input end of the first light-emitting control circuit is connected with the power supply, the output end of the first light-emitting control circuit is connected with the light-emitting device, and the first light-emitting control circuit is used for outputting a first driving current to the light-emitting device; the second light-emitting control circuit is connected with the first light-emitting control circuit in parallel, the control end of the second light-emitting control circuit is electrically connected with the output end of the data input circuit, and the second light-emitting control circuit is used for outputting a second driving current to the light-emitting device. The technical scheme provided by the application can improve the luminous efficiency of the blue sub-pixel.

Description

Pixel driving circuit and display panel
Technical Field
The present application relates to the field of display technologies, and in particular, to a pixel driving circuit and a display panel.
Background
Display panels based on Light Emitting devices such as Organic Light Emitting Diodes (OLEDs) are increasingly widely used in products such as televisions and mobile phones because of their characteristics of lightness, thinness, energy saving, wide viewing angle, wide color gamut, high contrast, etc.
The display panel comprises a series of pixels, each pixel generally comprising 3 red, green and blue sub-pixels, wherein the blue sub-pixel has a lower luminance than the red and green sub-pixels. In order to ensure the display effect of the display panel, the current method generally increases the area of the blue sub-pixel to increase the luminance of the blue sub-pixel. However, this approach may reduce the pixel density of the display panel, resulting in reduced resolution.
Disclosure of Invention
In view of the above, the present disclosure provides a pixel driving circuit and a display panel, which are used to increase the luminance of a blue sub-pixel without reducing the resolution of the display panel, so as to improve the display effect of the display panel.
In order to achieve the above object, in a first aspect, an embodiment of the present application provides a pixel driving circuit, including: the LED lamp comprises a data input circuit, an energy storage circuit, a first light-emitting control circuit and a second light-emitting control circuit;
the data input circuit is connected with the control end of the first light-emitting control circuit and is used for outputting data voltage to the first light-emitting control circuit;
the energy storage circuit is connected between the control end and the input end of the first light-emitting control circuit and used for storing electric energy;
the input end of the first light-emitting control circuit is connected with a power supply, the output end of the first light-emitting control circuit is connected with a light-emitting device, and the first light-emitting control circuit is used for outputting a first driving current to the light-emitting device;
the second light-emitting control circuit is connected in parallel with the first light-emitting control circuit, a control end of the second light-emitting control circuit is electrically connected with an output end of the data input circuit, and the second light-emitting control circuit is used for outputting a second driving current to the light-emitting device.
As an optional implementation manner of this embodiment, the second light-emitting control circuit includes a driving thin film transistor, a gate of the driving thin film transistor is electrically connected to the output end of the data input circuit, a first pole of the driving thin film transistor is connected to the power supply, and a second pole of the driving thin film transistor is connected to the light-emitting device.
As an optional implementation manner of this embodiment, the pixel driving circuit further includes: and the current adjusting circuit is connected between the control end of the second light-emitting control circuit and the output end of the data input circuit and is used for adjusting the second driving current.
As an optional implementation manner of the embodiment of the present application, the current regulation circuit includes a first resistor.
As an optional implementation manner of the embodiment of the present application, the current regulation circuit is located on a PCB.
As an optional implementation manner of this embodiment, the pixel driving circuit further includes: and the switching circuit is connected between the control end of the second light-emitting control circuit and the output end of the data input circuit, the control end of the switching circuit is connected with the control circuit, and the control circuit is used for controlling the switching circuit to be switched on or switched off.
As an optional implementation manner of the embodiment of the present application, the control circuit includes: the switch circuit is electrically connected with the output end of the level signal wire through the voltage stabilizing circuit, and the level signal wire outputs a high level or low level signal.
As an optional implementation manner of the embodiment of the present application, the switch circuit includes a switch tube, a gate of the switch tube is electrically connected to the control circuit, a first pole of the switch tube is electrically connected to the output end of the data input circuit, and a second pole of the switch tube is electrically connected to the control end of the second light-emitting control circuit.
As an optional implementation manner of this embodiment of this application, the first light emission control circuit and the second light emission control circuit are both composed of P-type field effect transistors.
In a second aspect, the present application provides a display panel, which includes a plurality of pixel units, and a blue sub-pixel of each pixel unit includes the pixel driving circuit and the light emitting device as described in the first aspect or any embodiment of the first aspect.
The pixel driving circuit and the display panel provided by the embodiment of the application comprise a data input circuit, an energy storage circuit, a first light-emitting control circuit and a second light-emitting control circuit; the data input circuit is connected with the control end of the first light-emitting control circuit and used for outputting data voltage to the first light-emitting control circuit; the energy storage circuit is connected between the control end and the input end of the first light-emitting control circuit and used for storing electric energy; the input end of the first light-emitting control circuit is connected with the power supply, the output end of the first light-emitting control circuit is connected with the light-emitting device, and the first light-emitting control circuit is used for outputting a first driving current to the light-emitting device; the second light-emitting control circuit is connected with the first light-emitting control circuit in parallel, the control end of the second light-emitting control circuit is electrically connected with the output end of the data input circuit, and the second light-emitting control circuit is used for outputting a second driving current to the light-emitting device. In the above scheme, the second light-emitting control circuit is connected in parallel with the first light-emitting control circuit, and the control terminal of the second light-emitting control circuit is electrically connected with the output terminal of the data input circuit, so that the second light-emitting control circuit can be switched on through the voltage at the output terminal of the data input circuit when the first light-emitting circuit is switched on, and outputs the second driving current to the light-emitting device, that is, the driving current of the light-emitting device is increased by the second driving current on the basis of the original first driving current.
Drawings
Fig. 1 is a schematic structural diagram of a blue sub-pixel in any pixel unit in a display panel according to an embodiment of the present disclosure;
FIG. 2 is a circuit diagram of the pixel driving circuit shown in FIG. 1;
fig. 3 is another circuit structure diagram of the pixel driving circuit in fig. 1.
Detailed Description
The embodiments of the present application will be described below with reference to the drawings. The terminology used in the description of the embodiments herein is for the purpose of describing particular embodiments herein only and is not intended to be limiting of the application. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
The Light Emitting device in the embodiment of the present application may be any one of an OLED, an inorganic Light Emitting Diode (LED), a Quantum Dot Light Emitting diode (QLED), and a submillimeter Light Emitting diode (Mini LED); the present embodiment will be described by taking the light emitting device as an OLED as an example.
Fig. 1 is a schematic structural diagram of a blue sub-pixel in any pixel unit of a display panel provided in the embodiment of the present application, where the display panel provided in the embodiment of the present application may include a plurality of pixel units, and each pixel unit may include a blue sub-pixel, a red sub-pixel, and a green sub-pixel, as shown in fig. 1, the blue sub-pixel may include: a power supply VDD, a pixel driving circuit, and a light emitting device OLED.
The pixel driving circuit may include: a data input circuit 10, a tank circuit 20, a first light emission control circuit 30, a second light emission control circuit 40, a current adjusting circuit 50, and a switch circuit 60.
The data input circuit 10 is connected to a control terminal of the first light-emitting control circuit 30, and is configured to output a data voltage to the first light-emitting control circuit 30.
The energy storage circuit 20 is connected between the control terminal and the input terminal of the first lighting control circuit 30, and is used for storing electric energy.
The input end of the first light emitting control circuit 30 is connected to the power supply VDD, the output end of the first light emitting control circuit 30 is connected to the light emitting device OLED, and the first light emitting control circuit 30 is configured to output a first driving current to the light emitting device OLED.
The second light-emitting control circuit 40 is connected in parallel to the first light-emitting control circuit 30, a control terminal of the second light-emitting control circuit 40 is electrically connected to the output terminal of the data input circuit 10, and the second light-emitting control circuit 40 is configured to output a second driving current to the light-emitting device OLED. The control ends of the first light-emitting control circuit 30 and the second light-emitting control circuit 40 are electrically connected with the control end of the data input circuit 10, so that the data voltage at the output end of the data input circuit 10 can enable the first light-emitting control circuit 30 and the second light-emitting control circuit 40 to be simultaneously conducted, and therefore the first driving current and the second driving current are output to the light-emitting device OLED, namely the driving current of the light-emitting device OLED is increased, the light-emitting device OLED is brighter, and the light-emitting rate of the blue sub-pixel corresponding to the light-emitting device OLED can be improved while the resolution of the display panel is not reduced.
The current adjusting circuit 50 is connected between the control terminal of the second light-emission control circuit 40 and the output terminal of the data input circuit 10, and adjusts the second driving current. The current adjusting circuit 50 can adjust the magnitude of the second driving current, so as to adjust the brightness of the light emitting device OLED, and further adjust the light emitting rate of the blue sub-pixel corresponding to the light emitting device OLED, so that the blue sub-pixel in each pixel is not too bright relative to the red sub-pixel and the green sub-pixel, and the display effect of the display panel is further improved.
The current adjusting Circuit 50 may be disposed on the array substrate, and since the manufacturing cost of the array substrate may reach hundreds of thousands, and the internal Circuit of the array substrate is difficult to adjust after the array substrate is manufactured, the current adjusting Circuit 50 may also be disposed on a Printed Circuit Board (PCB), and the manufacturing cost of the PCB is much lower than that of the array substrate, so that the second driving current may be adjusted by modifying the current adjusting Circuit 50 on the PCB or directly replacing the PCB, thereby greatly reducing the cost of adjusting the luminance of the blue sub-pixel.
In view of the above, in this embodiment, whether to increase the luminance of the blue sub-pixel may be controlled by adding the switch circuit 60 to the pixel driving circuit of the blue sub-pixel, so as to improve adaptability and flexibility.
The switch circuit 60 may be connected between the control terminal of the second light-emitting control circuit 40 and the output terminal of the data input circuit 10, the control terminal of the switch circuit 60 is connected to the control circuit 70, and the control circuit 70 is used for controlling the switch circuit 60 to be turned on or off.
Both the switch circuit 60 and the control circuit 70 may be disposed on a PCB to reduce the cost of subsequently adjusting the switch circuit 60 and the control circuit 70.
The control circuit 70 may include a voltage stabilizing circuit and a level signal line, and the switching circuit 60 is electrically connected to an output terminal of the level signal line through the voltage stabilizing circuit, and the level signal line may output a high level or a low level signal.
The control circuit 70 may also include a switching circuit, a first voltage stabilizing circuit and a second voltage stabilizing circuit, wherein a control end of the switching circuit is connected to the control line, a fixed end of the switching circuit is connected to the control end of the switch circuit 60, a first active end of the switching circuit is connected to the output end of the first voltage stabilizing circuit, a second active end of the switching circuit is connected to the output end of the second voltage stabilizing circuit, and the control line is used for outputting a control signal to control the active end of the switching circuit.
The input end of the first voltage stabilizing circuit can be connected with a high-level signal, and correspondingly, the input end of the second voltage stabilizing circuit can be connected with a low-level signal; the input end of the first voltage stabilizing circuit may be connected to a low level signal, and correspondingly, the input end of the second voltage stabilizing circuit is connected to a high level signal, which is not limited in this embodiment.
The present embodiment is exemplified by the control circuit 70 including a voltage stabilizing circuit and a level signal line.
Fig. 2 is a schematic circuit structure diagram of the pixel driving circuit in fig. 1, and as shown in fig. 2, the Data input circuit 10 may include a first switch T1, a Data line Data and a Scan line Scan, a gate of the first switch T1 is electrically connected to the Scan line Scan, a first pole of the first switch T1 is electrically connected to an output end of the Data line Data, and a second pole of the first switch T1 is electrically connected to a control end of the first light-emitting control circuit 30.
The tank circuit 20 may include a capacitor C1, one end of the capacitor C1 is electrically connected to the control terminal of the first lighting control circuit 30, and the other end of the capacitor C1 is connected to the input terminal of the first lighting control circuit 30.
The first light emission control circuit 30 may include a first driving thin film transistor T2, a gate electrode of the first driving thin film transistor T2 being electrically connected to the output terminal of the data input circuit 10, a first electrode of the first driving thin film transistor T2 being connected to the power source VDD, and a second electrode of the first driving thin film transistor T2 being connected to the light emitting device OLED.
The second light emission control circuit 40 may include a second driving thin film transistor T3, the second driving thin film transistor T3 being connected in parallel with the first driving thin film transistor T2, a gate electrode of the second driving thin film transistor T3 being electrically connected to an output terminal of the data input circuit 10, a first electrode of the second driving thin film transistor T3 being connected to the power source VDD, and a second electrode of the second driving thin film transistor T3 being connected to the light emitting device OLED.
The current adjusting circuit 50 may include a first resistor R1, the first resistor R1 is connected between the output terminal of the data input circuit 10 and the control terminal of the second light-emitting control circuit 40, and the resistance of the first resistor R1 may be adjusted, so as to adjust the second driving current, adjust the light-emitting luminance of the light-emitting device OLED, and adjust the light-emitting ratio of the corresponding blue sub-pixel.
The switch circuit 60 may include a second switch T4, a gate of the second switch T4 electrically connected to the control circuit 70, a first pole of the second switch T4 electrically connected to the output terminal of the data input circuit 10, and a second pole of the second switch T4 electrically connected to the control terminal of the second light-emitting control circuit 40.
The first driving thin film transistor T2, the second driving thin film transistor T3, the first switch transistor T1 and the second switch transistor T4 may all be P-type field effect transistors, so that the current in the circuit is more uniform, when the driving thin film transistors and the switch transistors are P-type field effect transistors, the first electrodes of the driving thin film transistors and the switch transistors are source electrodes, and the second electrodes are drain electrodes; the first driving thin film transistor T2, the second driving thin film transistor T3, the first switch transistor T1 and the second switch transistor T4 may also be N-type field effect transistors to increase the turn-on speed of each driving thin film transistor and each switch transistor, and when each driving thin film transistor and each switch transistor is an N-type field effect transistor, the first electrode of each driving thin film transistor and each switch transistor is a drain electrode, and the second electrode thereof is a gate electrode. In the following description, the switching transistors of the driving tfts are all P-type field effect transistors for exemplary purposes.
The voltage stabilizing circuit may include a second resistor R2, and the second resistor R2 is connected between the level signal line and the gate of the second switching transistor T4. When the light emitting rate of the blue sub-pixel needs to be increased, the level signal line can output a low level signal Vdown, at this time, the second switching tube T4 is turned on, the second driving thin film transistor T3 is turned on, the driving current of the light emitting device OLED is increased, and the light emitting rate of the blue sub-pixel is increased; when the light emitting rate of the blue sub-pixel does not need to be increased, as shown in fig. 3, the level signal line outputs a high level signal Vup, at this time, the second switching tube T4 is turned off, the second driving thin film transistor T3 is turned off, and the driving current of the light emitting device OLED is unchanged.
The technical scheme provided by the embodiment of the application comprises a data input circuit, an energy storage circuit, a first light-emitting control circuit and a second light-emitting control circuit; the data input circuit is connected with the control end of the first light-emitting control circuit and used for outputting data voltage to the first light-emitting control circuit; the energy storage circuit is connected between the control end and the input end of the first light-emitting control circuit and used for storing electric energy; the input end of the first light-emitting control circuit is connected with the power supply, the output end of the first light-emitting control circuit is connected with the light-emitting device, and the first light-emitting control circuit is used for outputting a first driving current to the light-emitting device; the second light-emitting control circuit is connected with the first light-emitting control circuit in parallel, a control end of the second light-emitting control circuit is electrically connected with an output end of the data input circuit, and the second light-emitting control circuit is used for outputting a second driving current to the light-emitting device. In the above scheme, the second light-emitting control circuit is connected in parallel with the first light-emitting control circuit, and the control terminal of the second light-emitting control circuit is electrically connected with the output terminal of the data input circuit, so that the second light-emitting control circuit can be switched on through the voltage at the output terminal of the data input circuit when the first light-emitting circuit is switched on, and outputs the second driving current to the light-emitting device, that is, the driving current of the light-emitting device is increased by the second driving current on the basis of the original first driving current.
In the above embodiments, the description of each embodiment has its own emphasis, and reference may be made to the related description of other embodiments for parts that are not described or recited in any embodiment.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The naming or numbering of the steps appearing in the present application does not mean that the steps in the method flow have to be executed in the chronological/logical order indicated by the naming or numbering, and the named or numbered process steps may be executed in a modified order depending on the technical purpose to be achieved, as long as the same or similar technical effects are achieved.
In the description of the present application, "/" indicates a relationship in which the objects linked before and after are "or", for example, a/B may indicate a or B; in the present application, "and/or" is only an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural.
Also, in the description of the present application, "a plurality" means two or more than two unless otherwise specified. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, described with reference to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A pixel driving circuit, comprising: the LED lamp comprises a data input circuit, an energy storage circuit, a first light-emitting control circuit and a second light-emitting control circuit;
the data input circuit is connected with the control end of the first light-emitting control circuit and is used for outputting data voltage to the first light-emitting control circuit;
the energy storage circuit is connected between the control end and the input end of the first light-emitting control circuit and used for storing electric energy;
the input end of the first light-emitting control circuit is connected with a power supply, the output end of the first light-emitting control circuit is connected with a light-emitting device, and the first light-emitting control circuit is used for outputting a first driving current to the light-emitting device;
the second light-emitting control circuit is connected in parallel with the first light-emitting control circuit, a control end of the second light-emitting control circuit is electrically connected with an output end of the data input circuit, and the second light-emitting control circuit is used for outputting a second driving current to the light-emitting device.
2. The circuit of claim 1, wherein the second light emission control circuit comprises a driving thin film transistor, a gate of the driving thin film transistor is electrically connected to the output terminal of the data input circuit, a first pole of the driving thin film transistor is connected to the power supply, and a second pole of the driving thin film transistor is connected to the light emitting device.
3. The circuit of claim 1, wherein the pixel driving circuit further comprises: and the current adjusting circuit is connected between the control end of the second light-emitting control circuit and the output end of the data input circuit and is used for adjusting the second driving current.
4. The circuit of claim 3, wherein the current regulation circuit comprises a first resistor.
5. The circuit of claim 3, wherein the current regulation circuit is located on a PCB board.
6. The circuit of claim 1, wherein the pixel driving circuit further comprises: and the switching circuit is connected between the control end of the second light-emitting control circuit and the output end of the data input circuit, the control end of the switching circuit is connected with the control circuit, and the control circuit is used for controlling the switching circuit to be switched on or switched off.
7. The circuit of claim 6, wherein the control circuit comprises: the switch circuit is electrically connected with the output end of the level signal line through the voltage stabilizing circuit, and the level signal line outputs a high level or low level signal.
8. The circuit of claim 6, wherein the switching circuit comprises a switching tube, a gate of the switching tube is electrically connected to the control circuit, a first pole of the switching tube is electrically connected to the output terminal of the data input circuit, and a second pole of the switching tube is electrically connected to the control terminal of the second light-emitting control circuit.
9. The circuit of any of claims 1-8, wherein the first and second emission control circuits are each comprised of P-type field effect transistors.
10. A display panel comprising a plurality of pixel units, the blue sub-pixel of each of the pixel units comprising the pixel driving circuit and the light emitting device according to any one of claims 1 to 9.
CN202210840246.4A 2022-07-18 2022-07-18 Pixel driving circuit and display panel Pending CN115050307A (en)

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Application Number Priority Date Filing Date Title
CN202210840246.4A CN115050307A (en) 2022-07-18 2022-07-18 Pixel driving circuit and display panel

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Application Number Priority Date Filing Date Title
CN202210840246.4A CN115050307A (en) 2022-07-18 2022-07-18 Pixel driving circuit and display panel

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CN115050307A true CN115050307A (en) 2022-09-13

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Application publication date: 20220913