CN117238245A - Display panel and display device - Google Patents
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- CN117238245A CN117238245A CN202311467773.6A CN202311467773A CN117238245A CN 117238245 A CN117238245 A CN 117238245A CN 202311467773 A CN202311467773 A CN 202311467773A CN 117238245 A CN117238245 A CN 117238245A
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Abstract
The embodiment of the application discloses a display panel and a display device, which comprise a plurality of scanning lines, a plurality of data lines and a plurality of pixel units which are arranged in an array, wherein the pixel units are used for receiving data signals from the data lines under the control of the scanning lines to execute image display. The pixel unit is connected to the power end and the low voltage end and is used for receiving driving voltage from the power end under the control of the data signal, the driving voltage and the low voltage end form voltage difference to drive the pixel unit to emit light, the display panel further comprises a voltage control unit, the voltage control unit is connected to the power end or the low voltage end and is used for controlling the voltage difference between the power end and the low voltage end to be located in a preset range, and therefore the utilization rate of the driving voltage output by the power end can be effectively improved, and the power consumption of the display panel is reduced.
Description
Technical Field
The application relates to the technical field of display, in particular to a display panel and a display device.
Background
An Organic Light-Emitting Diode (OLED) display device has the advantages of self-luminescence, low driving current, high luminous efficiency, short response time, high definition and contrast, a viewing angle of nearly 180 degrees, wide use temperature range, capability of realizing flexible display, large-area full-color display and the like, and is considered as a display device with certain development potential in the industry. In the OLED display panel, a fixed voltage is generally applied across the cathode and anode of the organic light emitting diode to drive the organic light emitting diode to emit light.
However, in order to satisfy all gray scale display, it is necessary to control the voltage difference between two ends of the light emitting diode to be maintained at a high level, so that the light emitting diode has a low driving voltage utilization rate when performing low gray scale brightness, and has a high power consumption, and the light emitting diode is always in a high voltage difference state, so that the life of the organic light emitting diode is consumed fast.
Disclosure of Invention
In view of the above-mentioned shortcomings, the present application provides a display panel and a display device capable of effectively improving the driving voltage utilization ratio and reducing the power consumption.
The embodiment of the application discloses a display panel which comprises a plurality of scanning lines, a plurality of data lines and a plurality of pixel units, wherein the scanning lines extend along a first direction and are sequentially arranged along a second direction, the data lines extend along the second direction and are sequentially arranged along the first direction, and the pixel units are arranged in an array, and are used for receiving data signals from the data lines under the control of the scanning lines to execute image display. The pixel unit is connected to a power end and a low-voltage end and is used for receiving a driving voltage from the power end under the control of the data signal, the driving voltage and the low-voltage end form a voltage difference to drive the pixel unit to emit light, and the display panel further comprises a voltage control unit, wherein the voltage control unit is connected to the power end or the low-voltage end and is used for controlling the voltage difference between the power end and the low-voltage end to be in a preset range.
Optionally, the low voltage end includes a first low voltage end and a second low voltage end, the voltage control unit is connected to the first end of the light emitting element emitting light in the pixel unit, the first low voltage end and the second low voltage end, when the gray scale displayed by the pixel unit is greater than a preset gray scale, the voltage control unit controls the first low voltage end to be connected to the first end of the light emitting element so as to provide a first voltage to the light emitting element, and is used for controlling the voltage difference between the first end and the second end of the light emitting element to be a first voltage difference. When the gray scale displayed by the pixel unit is smaller than or equal to the preset gray scale, the voltage control unit controls the second low-voltage end to be connected to the first end of the light-emitting element so as to provide a second voltage to the light-emitting element, and is used for controlling the voltage difference between the first end and the second end of the light-emitting element to be a second voltage difference, wherein the first voltage is smaller than the second voltage, and the first voltage difference is larger than the second voltage difference.
Optionally, the voltage control unit includes a first control switch tube and a second control switch tube, a gate of the first control switch tube is connected to a control end, a source of the first control switch tube is connected to the first low-voltage end, a drain of the first control switch tube is connected to the first end of the light emitting element, and is used for being conducted under control of the control end so as to control the first low-voltage end to be connected to the first end of the light emitting element. The grid electrode of the second control switch tube is connected to the control end, the source electrode of the second control switch tube is connected to the second low-voltage end, the drain electrode of the second control switch tube is connected to the first end of the light-emitting element and used for being conducted under the control of the control end so as to control the second low-voltage end to be connected to the first end of the light-emitting element.
Optionally, the power supply terminal includes a first power supply terminal and a second power supply terminal, the voltage control unit is connected to the second terminal of the light emitting element, the first power supply terminal and the second power supply terminal, when the gray scale displayed by the pixel unit is greater than a preset gray scale, the voltage control unit controls the first power supply terminal to be connected to the second terminal of the light emitting element, so as to provide a first driving voltage to the light emitting element, and is used for controlling the voltage difference between the first terminal and the second terminal of the light emitting element to be a first voltage difference. When the gray scale displayed by the pixel unit is smaller than or equal to the preset gray scale, the voltage control unit controls the second power supply end to be connected to the second end of the light emitting element so as to provide a second driving voltage to the light emitting element, wherein the voltage difference between the first end and the second end of the light emitting element is controlled to be a second voltage difference, the first driving voltage is larger than the second driving voltage, and the first voltage difference is larger than the second voltage difference.
Optionally, the voltage control unit includes a first control switch tube and a second control switch tube, a gate of the first control switch tube is connected to a control end, a source of the first control switch tube is connected to the first power end, and a drain of the first control switch tube is connected to the second end of the light emitting element and is used for being conducted under control of the control end so as to control the first power end to be connected to the second end of the light emitting element. The grid electrode of the second control switch tube is connected to the control end, the source electrode of the second control switch tube is connected to the second power end, the drain electrode of the second control switch tube is connected to the second end of the light-emitting element and used for being conducted under the control of the control end so as to control the second power end to be connected to the second end of the light-emitting element.
Optionally, the low voltage terminal includes a first low voltage terminal, a second low voltage terminal and a third low voltage terminal, the voltage control unit is connected to the first terminal, the first low voltage terminal, the second low voltage terminal and the third low voltage terminal of the light emitting element, when the gray scale displayed by the pixel unit is greater than a first preset gray scale, the voltage control unit controls the first low voltage terminal to be connected to the first terminal of the light emitting element so as to provide a first voltage to the light emitting element, and is used for controlling the voltage difference between the first terminal and the second terminal of the light emitting element to be a first voltage difference. When the gray scale displayed by the pixel unit is larger than a second preset gray scale and smaller than or equal to a first preset gray scale, the voltage control unit controls the second low-voltage end to be connected to the first end of the light-emitting element so as to provide a second voltage to the light-emitting element, and the voltage difference between the first end and the second end of the light-emitting element is controlled to be a second voltage difference. When the gray scale displayed by the pixel unit is smaller than a second preset gray scale, the voltage control unit controls the third low-voltage end to be connected to the first end of the light-emitting element so as to provide a third voltage to the light-emitting element, and the voltage difference between the first end and the second end of the light-emitting element is controlled to be a third voltage difference. The first voltage is smaller than the second voltage, the second voltage is smaller than the third voltage, the first voltage difference is larger than the second voltage difference, the second voltage difference is larger than the third voltage difference, and the first preset gray level is larger than the second preset gray level.
Optionally, the voltage control unit includes a first control switch tube, a second control switch tube and a third control switch tube, a gate of the first control switch tube is connected to a control end, a source of the first control switch tube is connected to the first low-voltage end, a drain of the first control switch tube is connected to the first end of the light emitting element, and is used for being conducted under the control of the control end so as to control the first low-voltage end to be connected to the first end of the light emitting element. The grid electrode of the second control switch tube is connected to the control end, the source electrode of the second control switch tube is connected to the second low-voltage end, the drain electrode of the second control switch tube is connected to the first end of the light-emitting element and used for being conducted under the control of the control end so as to control the second low-voltage end to be connected to the first end of the light-emitting element. The grid electrode of the third control switch tube is connected to the control end, the source electrode of the third control switch tube is connected to the third low-voltage end, the drain electrode of the third control switch tube is connected to the first end of the light-emitting element and used for being conducted under the control of the control end so as to control the third low-voltage end to be connected to the first end of the light-emitting element.
Optionally, the power supply terminal includes a first power supply terminal, a second power supply terminal and a third power supply terminal, the voltage control unit is connected to the first end of the light emitting element, the first power supply terminal, the second power supply terminal and the third power supply terminal, when the gray scale displayed by the pixel unit is greater than a first preset gray scale, the voltage control unit controls the first power supply terminal to be connected to the second end of the light emitting element, so as to provide a first driving voltage to the light emitting element, and is used for controlling the voltage difference between the first end and the second end of the light emitting element to be a first voltage difference. When the gray scale displayed by the pixel unit is larger than a second preset gray scale and smaller than or equal to a first preset gray scale, the voltage control unit controls the second power end to be connected to the second end of the light emitting element so as to provide a second driving voltage to the light emitting element, and the voltage control unit is used for controlling the voltage difference between the first end and the second end of the light emitting element to be a second voltage difference. When the gray scale displayed by the pixel unit is smaller than a second preset gray scale, the voltage control unit controls the third power supply end to be connected to the second end of the light emitting element so as to provide a third driving voltage to the light emitting element, and the voltage difference between the first end and the second end of the light emitting element is controlled to be a third voltage difference. The first driving voltage is larger than the second driving voltage, the second driving voltage is larger than the third driving voltage, the first voltage difference is larger than the second voltage difference, the second voltage difference is larger than the third voltage difference, and the first preset gray level is larger than the second preset gray level.
Optionally, the pixel unit includes a first switch tube, a second switch tube, and a light emitting diode, where the light emitting diode is used as the light emitting element, an anode of the light emitting diode is a first end of the light emitting element, and an anode of the light emitting diode is a second end of the light emitting element. The grid electrode of the first switching tube is connected to the scanning line, the source electrode of the first switching tube is connected to the data line, the drain electrode of the first switching tube is connected to the grid electrode of the second switching tube and used for being conducted under the control of a scanning signal output by the scanning line so as to transmit the data signal to the second switching tube, the source electrode of the second switching tube is connected to the power end, the drain electrode of the second switching tube is connected to the light emitting diode and used for being conducted under the control of the data signal and transmitting the driving voltage to the light emitting diode so as to control the light emitting diode to emit light.
The embodiment of the application also discloses a device which comprises a power supply module and the display panel, wherein the power supply module is used for providing a driving power supply for the display panel when displaying images.
Compared with the prior art, the application has the advantages that the voltage control unit is arranged, the voltage difference between the two ends of the pixel unit is regulated through the voltage control unit, when the pixel unit displays different brightness, different voltage differences are provided for the pixel unit, so that the utilization rate of driving voltages between the two ends of the pixel unit is improved, when the pixel unit displays low gray scale, the voltage difference between the two ends of the pixel unit is reduced, so that the power consumption of the pixel unit is reduced, and when the pixel unit displays high gray scale, the voltage difference between the two ends of the pixel unit is increased, so that the high gray scale display of the pixel unit is satisfied.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the application;
FIG. 2 is a schematic side view of the display panel of FIG. 1;
FIG. 3 is a schematic plan layout of the array substrate in FIG. 2;
FIG. 4 is a schematic diagram of an equivalent circuit of the pixel unit in FIG. 3;
FIG. 5 is a schematic diagram of pixel unit connection according to a second embodiment of the present application;
FIG. 6 is a schematic diagram of a pixel unit connection according to a third embodiment of the present application;
fig. 7 is a schematic diagram of pixel unit connection according to a fourth embodiment of the present application;
fig. 8 is a schematic diagram of pixel unit connection according to a fifth embodiment of the present application.
Reference numerals illustrate:
the display device comprises a display device 100, a display panel 10, a power module 20, a display area 10a, a non-display area 10b, an array substrate 10C, a counter substrate 10D, a display medium layer 10e, m data lines S1-Sm, n scanning lines G1-Gn, a first direction F1, a second direction F2, a time sequence control circuit 11, a data driving circuit 12, a scanning driving circuit 13, a pixel unit 15, a power end-VDD, a low voltage end-VSS, an ith scanning line Gi, a jth data line-Sj, a signal receiving module 151, a driving module 152, a light emitting module 153, a first switching tube T1, a second switching tube T2, a stabilizing capacitor C, a light emitting diode D, a voltage control unit 16, a control end-17, a first control switching tube-TK 1, a second control switching tube-TK 2, a third control switching tube TK3, a first low voltage end-VSS 1, a second low voltage end-VDD, a third power end-VSS 2 and a third power end-VDD.
Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the application. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
The following description of the embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the application may be practiced. The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated. Directional terms, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., in the present application are merely referring to the directions of the attached drawings, and thus, directional terms are used for better, more clear explanation and understanding of the present application, rather than indicating or implying that the apparatus or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art. It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and in the drawings are used for distinguishing between different objects and not for describing a particular sequential order.
Furthermore, the terms "comprises," "comprising," "includes," "including," or "having," when used in this specification, are intended to specify the presence of stated features, operations, elements, etc., but do not limit the presence of one or more other features, operations, elements, etc., but are not limited to other features, operations, elements, etc. Furthermore, the terms "comprises" or "comprising" mean that there is a corresponding feature, number, step, operation, element, component, or combination thereof disclosed in the specification, and that there is no intention to exclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof. Furthermore, when describing embodiments of the application, use of "may" means "one or more embodiments of the application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a display device 100 according to a first embodiment of the application. The display device 100 includes a display panel 10 and a power module 20, wherein the power module 20 is disposed on a back surface of the display panel 10, i.e. a non-display surface of the display panel 10. The power module 20 is used for providing driving power for displaying images on the display panel 10.
Referring to fig. 2, fig. 2 is a schematic side view of the display panel 10 in fig. 1.
As shown in fig. 2, the display panel 10 includes a display region 10a for an image and a non-display region 10b. The display area 10a is used for performing image display, and the non-display area 10b is disposed around the display area 10a to provide other auxiliary components or modules, and specifically, the display panel 10 includes an array substrate 10c and an opposite substrate 10d, and a display medium layer 10e sandwiched between the array substrate 10c and the opposite substrate 10 d. In this embodiment, the display medium in the display medium layer 10e may be a material such as liquid crystal molecules, OLED, micro LED, mini LED, etc.
Referring to fig. 3, fig. 3 is a schematic plan layout of the array substrate 10c in fig. 2. As shown in fig. 3, the array substrate 10c includes a plurality of pixel units 15 arranged in a matrix, m data lines S1 to Sm, and n scan lines G1 to Gn, where m and n are natural numbers greater than 1.
The n scan lines G1-Gn extend along a first direction F1 and are mutually insulated and arranged in parallel along a second direction F2, the m data lines S1-Sm extend along the second direction F2 and are mutually insulated and arranged in parallel along the first direction F1, and the first direction F1 and the second direction F2 are mutually perpendicular.
The display device 100 further includes a timing control circuit 11, a data driving circuit 12, and a scan driving circuit 13 provided on the array substrate 10c for driving the pixel units to display an image, corresponding to the non-display region 10b (fig. 2) of the display panel 10.
The timing control circuit 11 is electrically connected to the data driving circuit 12 and the scan driving circuit 13, and is used for controlling the working timings of the data driving circuit 12 and the scan driving circuit 13, i.e. outputting corresponding timing control signals to the data driving circuit 12 to the scan driving circuit 13, so as to control when to output corresponding scan signals and data signals.
The Data driving circuit 12 is electrically connected to the m Data lines S1 to Sm, and is configured to transmit a Data signal (Data) for displaying to the plurality of pixel units 15 in the form of a Data voltage through the m Data lines S1 to Sm.
The scan driving circuit 13 is electrically connected to the n scan lines G1 to Gn, and is configured to output a scan signal through the n scan lines G1 to Gn for controlling when the pixel unit 15 receives a data signal. The scan driving circuit 13 sequentially outputs scan signals from the n scan lines G1 to Gn in the position arrangement order from the scan lines G1, G2, … …, gn in the scan period.
In the present embodiment, the circuit elements in the scan driving circuit 13 and the pixel units 15 in the array substrate 10c are fabricated in the same process in the array substrate 10c, i.e. GOA (Gate Driver on Array) technology.
Referring to fig. 4, fig. 4 is an equivalent circuit schematic diagram of the pixel unit in fig. 3.
As shown in fig. 4, the pixel unit 15 includes a signal receiving module 151, a driving module 152 and a light emitting module 153, wherein the signal receiving module is connected to the j-th data line Sj and the driving module 152, and is configured to receive a data signal from the j-th data line Sj and transmit the data signal to the driving module 152, the driving module 152 is connected to the driving power terminal VDD and the light emitting module, and is configured to control the driving power terminal VDD to drive the light emitting module 153 according to the received data signal, and the light emitting module 153 is connected to the driving module 152 and the low voltage terminal VSS, and is configured to emit light under the driving of a voltage difference formed by the driving power terminal VDD and the low voltage terminal VSS.
The signal receiving module 151 includes a first switching tube T1, where a gate of the first switching tube T1 is connected to the ith scan line Gi, a source of the first switching tube T1 is connected to the jth data line Sj, and a drain of the first switching tube T1 is connected to the driving module 152, and the first switching tube T1 is configured to receive a data signal from the jth data line Sj under control of a scan signal output by the ith scan line Gi and transmit the data signal to the driving module 152, where 1 is greater than or equal to i and less than or equal to n, and 1 is greater than or equal to j and less than or equal to m.
The driving module 152 includes a second switching tube T2 and a voltage stabilizing capacitor C, where a gate of the second switching tube T2 is connected to a drain of the first switching tube T1, a source of the second switching tube T2 is connected to the driving power terminal VDD, a drain of the second switching tube T2 is connected to the light emitting module 153, and the second switching tube T2 is used for being turned on under control of a data signal to receive the driving power from the driving power terminal VDD and transmit the driving power to the light emitting module 153.
The light emitting module 153 includes a light emitting diode D, an anode of the light emitting diode D is connected to a drain of the second switching tube T2, and a cathode of the light emitting diode D is connected to the low voltage terminal VSS for emitting light under control of a voltage difference formed between the driving power source output from the driving power source terminal VDD and the low voltage terminal VSS.
The voltages of the driving power supply terminal VDD and the low voltage terminal VSS are fixed voltages, and the light emitting diode D controls the opening degree of the second switching tube T2 according to the magnitude of the data signal, that is, controls the magnitude of the current transmitted to the light emitting diode D by the second switching tube T2, thereby controlling the brightness of the light emitting diode D.
Since the voltage difference between the driving power supply terminal VDD and the low voltage terminal VSS is a fixed value, the power consumption of the pixel unit is unchanged when the light emitting diode D performs high-gray-scale or low-gray-scale display. When the light emitting diode D is performing high gray scale display, the required voltage of the light emitting diode D is large, so that most of the voltage output by the driving power supply terminal VDD can be utilized, that is, the voltage utilization rate of the light emitting diode D is high during high gray scale display, but when the light emitting diode D is performing low gray scale display, the required voltage of the light emitting diode D is small, so that only a small part of the voltage output by the driving power supply terminal VDD can be utilized, that is, the voltage utilization rate of the light emitting diode D is low during low gray scale display.
Referring to fig. 5, fig. 5 is a schematic diagram of a pixel unit connection according to a second embodiment of the present application.
As shown in fig. 5, the display panel 10 further includes a plurality of voltage control units 16, and the voltage control units 16 are connected to the low voltage terminal for controlling the voltage difference between the power source terminal and the low voltage terminal to be within a predetermined range. That is, each voltage control unit 16 is respectively connected to a row of pixel units, wherein the voltage control unit 16 is connected to the cathode of each led D in a row of pixel units, and is configured to provide different low voltages to the cathode of the led D to adjust the voltage difference between two ends of the led D, that is, respectively form different voltage differences with the driving voltage output by the power supply terminal VDD, so as to drive the led D to emit light.
The voltage control unit 16 includes a first control switch tube TK1 and a second control switch tube TK2, where a gate of the first control switch tube TK1 is connected to the control end 17, a source of the first control switch tube TK1 is connected to the first low voltage end VSS1, a drain of the first control switch tube TK1 is connected to a cathode of the light emitting diode D, and the first control switch tube TK1 is used for being turned on under control of the control end 17 to connect the first low voltage end VSS1 to the cathode of the light emitting diode D in the corresponding row, and is used for providing a first voltage to the cathode of the light emitting diode D.
The grid electrode of the second control switch tube TK2 is connected to the control end 17, the source electrode of the second control switch tube TK2 is connected to the second low-voltage end VSS2, the drain electrode of the second control switch tube TK2 is connected to the cathode of the light emitting diode D, and the second control switch tube TK2 is used for being conducted under the control of the control end 17 so as to connect the second low-voltage end VSS2 with the cathodes of the light emitting diodes of the corresponding row and is used for providing a second voltage for the cathodes of the light emitting diodes D. Wherein the second voltage is greater than the first voltage.
Specifically, when at least one pixel unit of the i-th row of the plurality of pixel units displays a gray level greater than a preset gray level, the control terminal 17 outputs a first control signal to the voltage control unit 16 for controlling the first control switch tube TK1 to be turned on so as to connect the first low voltage terminal VSS1 to the cathode of the light emitting diode D in the i-th row of pixel units, and for providing the first voltage to the light emitting diode D, so that the voltage difference between the anode and the cathode of the light emitting diode D is the first voltage difference.
When the gray levels displayed by the pixel units in the ith row are smaller than the preset gray levels, the control end 17 outputs a second control signal to the second control switch tube TK2 to connect the second low-voltage end VSS2 to the cathode of the light emitting diode D in the pixel unit in the ith row, so as to provide a second voltage for the light emitting diode D, so that the voltage difference between the anode and the cathode of the light emitting diode D is the second voltage difference.
In an exemplary embodiment, the preset gray level may be set to 100 gray levels, the first voltage may be set to 0.1V, the second voltage may be set to between 0.4 and 0.6 times the power supply voltage, preferably, the second voltage is set to 3V, and the preset gray level and the first voltage may be set to other values according to specific needs, which is not limited in the present application.
In an exemplary embodiment, the first control switch tube TK1 may be an N-type transistor, the second control switch tube TK2 may be a P-type transistor, the first control signal output by the control end 17 is a high level signal to control the first control switch tube TK1 to be turned on, the second control switch tube TK2 to be turned off, and the second control signal output by the control end 17 is a low level signal to control the first control switch tube TK1 to be turned off and the second control switch tube TK2 to be turned on.
Referring to fig. 6, fig. 6 is a schematic diagram illustrating a pixel unit connection according to a third embodiment of the present application.
As shown in fig. 6, the display panel 10 further includes a plurality of voltage control units 16, each voltage control unit 16 is respectively connected to a row of pixel units, wherein the voltage control units 16 are connected to anodes of each light emitting diode D in the row of pixel units, and are used for providing different driving voltages for the anodes of the light emitting diodes D so as to adjust a voltage difference across the light emitting diodes D, and for reducing power consumption of the pixel units while driving the light emitting diodes D to emit light.
The voltage control unit 16 includes a first control switch tube TK1 and a second control switch tube TK2, where a gate of the first control switch tube TK1 is connected to the control end 17, a source of the first control switch tube TK1 is connected to the first power end VDD1, a drain of the first control switch tube TK1 is connected to an anode of the light emitting diode D, and the first control switch tube TK1 is used for being turned on under control of the control end 17 to connect the first power end VDD1 with the anode of the light emitting diode D in a corresponding row, and is used for providing a first driving voltage for the anode of the light emitting diode D.
The grid electrode of the second control switch tube TK2 is connected to the control end 17, the source electrode of the second control switch tube TK2 is connected to the second power end VDD2, the drain electrode of the second control switch tube TK2 is connected to the anode of the light emitting diode D, and the second control switch tube TK2 is used for being conducted under the control of the control end 17 so as to connect the second power end VDD2 with the anodes of the light emitting diodes of the corresponding row and is used for providing a second driving voltage for the anode of the light emitting diode D. The second driving voltage is smaller than the first driving voltage, that is, the first voltage difference is larger than the second voltage difference.
Specifically, when at least one pixel unit of the i-th row of the plurality of pixel units displays a gray level greater than a preset gray level, the control terminal 17 outputs a first control signal to the voltage control unit 16 for controlling the first control switch tube TK1 to be turned on so as to connect the first power supply terminal VDD1 to the anode of the light emitting diode D in the i-th row of pixel units, and for providing the first driving voltage for the light emitting diode D, so that the voltage difference between the cathode and the anode of the light emitting diode D is the first voltage difference.
When the gray levels displayed by the pixel units in the ith row are smaller than the preset gray levels, the control end 17 outputs a second control signal to the second control switch tube TK2 to connect the second power end VDD2 to the anode of the light emitting diode D in the pixel unit in the ith row, so as to provide a second driving voltage for the light emitting diode D, so that the voltage difference between the cathode and the anode of the light emitting diode D is the second voltage difference.
In an exemplary embodiment, the preset gray level may be set to 100 gray levels, the first driving voltage may be set to 6V, the second driving voltage may be set to 3V, and the preset gray level, the first driving voltage, and the second driving voltage may be set to other values according to specific needs, which is not limited in the present application.
In an exemplary embodiment, the first control switch tube TK1 may be an N-type transistor, the second control switch tube TK2 may be a P-type transistor, the first control signal output by the control end 17 is a high level signal to control the first control switch tube TK1 to be turned on, the second control switch tube TK2 to be turned off, and the second control signal output by the control end 17 is a low level signal to control the first control switch tube TK1 to be turned off and the second control switch tube TK2 to be turned on.
Referring to fig. 7, fig. 7 is a schematic diagram of a pixel unit connection according to a fourth embodiment of the application.
As shown in fig. 7, the display panel 10 further includes a plurality of voltage control units 16, wherein each voltage control unit 16 is respectively connected to a row of pixel units, and the voltage control unit 16 is connected to a cathode of each light emitting diode D in the row of pixel units, and is configured to provide different low voltages to the cathode of the light emitting diode D to adjust a voltage difference across the light emitting diode D, that is, respectively form different voltage differences with the driving voltage output by the power source terminal VDD, so as to drive the light emitting diode D to emit light.
The voltage control unit 16 includes a first control switch tube TK1, a second control switch tube TK2, and a third control switch tube TK3, where a gate of the first control switch tube TK1 is connected to the control end 17, a source of the first control switch tube TK1 is connected to the first low voltage end VSS1, a drain of the first control switch tube TK1 is connected to a cathode of the light emitting diode D, and the first control switch tube TK1 is used for being turned on under control of the control end 17 to connect the first low voltage end VSS1 to the cathode of the light emitting diode D in the corresponding row, and is used for providing a first voltage to the cathode of the light emitting diode D.
The grid electrode of the second control switch tube TK2 is connected to the control end 17, the source electrode of the second control switch tube TK2 is connected to the second low-voltage end VSS2, the drain electrode of the second control switch tube TK2 is connected to the cathode of the light emitting diode D, and the second control switch tube TK2 is used for being conducted under the control of the control end 17 so as to connect the second low-voltage end VSS2 with the cathodes of the light emitting diodes of the corresponding row and is used for providing a second voltage for the cathodes of the light emitting diodes D.
The grid electrode of the third control switch tube TK3 is connected to the control end 17, the source electrode of the third control switch tube TK3 is connected to the third low-voltage end VSS3, the drain electrode of the third control switch tube TK3 is connected to the cathode of the light emitting diode D, and the third control switch tube TK3 is used for being conducted under the control of the control end 17 so as to connect the third low-voltage end VSS3 with the cathodes of the light emitting diodes of the corresponding row and is used for providing a third voltage for the cathodes of the light emitting diodes D.
The first voltage is smaller than the second voltage, and the second voltage is smaller than the third voltage.
Specifically, when at least one pixel unit of the i-th row of the plurality of pixel units displays a gray level greater than a first preset gray level, the control terminal 17 outputs a first control signal to the voltage control unit 16 for controlling the first control switch tube TK1 to be turned on so as to connect the first low voltage terminal VSS1 to the cathode of the light emitting diode D in the i-th row of pixel units, and is used for providing a first voltage for the light emitting diode D, so that the voltage difference between the anode and the cathode of the light emitting diode D is the first voltage difference.
When at least one pixel unit of the i-th row of the plurality of pixel units displays a gray level greater than a second preset gray level and less than the first preset gray level, the control end 17 outputs a second control signal to the second control switch tube TK2 to connect the second low voltage end VSS2 to the cathode of the light emitting diode D in the i-th row of pixel units, so as to provide a second voltage for the light emitting diode D, so that the voltage difference between the anode and the cathode of the light emitting diode D is the second voltage difference.
When the gray levels displayed by the pixel units in the ith row are smaller than the second preset gray level, the control end 17 outputs a third control signal to the third control switch tube TK3 to connect the third low voltage end VSS3 to the cathode of the light emitting diode D in the pixel unit in the ith row, so as to provide a third voltage for the light emitting diode D, so that the voltage difference between the anode and the cathode of the light emitting diode D is the third voltage difference.
The first voltage is smaller than the second voltage, the second voltage is smaller than the third voltage, namely the first voltage difference is larger than the second voltage difference, the second voltage difference is larger than the third voltage difference, and the first gray scale is larger than the second gray scale.
When the gray level displayed by the pixel unit is greater than the first gray level, the driving voltage required by the light emitting diode D is greater, that is, the voltage difference required between the cathode and the anode of the light emitting diode D is greater, at this time, the first low voltage terminal VSS1 is controlled to output the first voltage, so that the greater voltage difference formed by the first voltage and the driving voltage output by the power supply terminal VDD, that is, the first voltage difference, is formed, thereby effectively driving the light emitting diode D to display the preset brightness, and at this time, the light emitting diode D has a higher utilization ratio on the driving voltage.
When the gray scale displayed by the pixel unit is between the first gray scale and the second gray scale, the driving voltage required by the light emitting diode D is reduced, that is, the voltage difference required between the cathode and the anode of the light emitting diode D is reduced, at this time, the second low voltage terminal VSS2 is controlled to output the second voltage, so that the second voltage and the driving voltage output by the power supply terminal VDD form a second voltage difference smaller than the first voltage difference, thereby reducing the power consumption and improving the driving voltage utilization ratio when the light emitting diode D is driven.
When the gray scale displayed by the pixel unit is smaller than the second gray scale, the driving voltage required by the light emitting diode D is further reduced, that is, the voltage difference required between the cathode and the anode of the light emitting diode D is smaller, at this time, the third low voltage terminal VSS3 is controlled to output the third voltage, so that the third voltage and the driving voltage output by the power supply terminal VDD form a third voltage difference smaller than the second voltage difference, thereby further reducing the power consumption and improving the utilization ratio of the driving voltage when the light emitting diode D is driven. By dividing the gray scale brightness displayed by the pixel units, different driving voltage differences are provided for the two ends of the light emitting diode D in different gray scale ranges, so that the voltage difference of the two ends of the light emitting diode D is reduced while the normal light emission of the light emitting diode D is maintained, the driving voltage utilization rate is improved, and the power consumption of the pixel units is reduced.
In an exemplary embodiment, the first gray level may be set to 180 gray levels, the second gray level may be set to 90 gray levels, the first voltage may be set to 0.1V, the second voltage may be set to 2V, and the third voltage may be set to 4V, when the gray level displayed by the pixel unit is greater than 180 gray levels, the cathode of the light emitting diode in the pixel unit is provided with a voltage of 0.1V, when the gray level displayed by the pixel unit is greater than 90 gray levels and less than or equal to 180 gray levels, the cathode of the light emitting diode D in the pixel unit is provided with a voltage of 2V, but when the gray level displayed by the pixel unit is less than or equal to 90 gray levels, the cathode of the light emitting diode D is provided with a voltage of 4V, although the gray level and the voltage value may also be set according to specific needs, and the present application is not limited thereto.
For example, in a frame image display process, when at least one pixel unit in the first row of pixel units is about to display a gray level greater than 180, such as 192 gray levels, 225 gray levels, etc., the voltage control unit 16 corresponding to the first row of pixel units controls the first low voltage terminal VSS1 to be connected to the cathode of the light emitting diode D in the first row of pixel units, so as to provide the light emitting diode D with a first voltage, i.e. 0.1V, and the voltage of the power supply terminal VDD can be 6V, the voltage difference between two ends of the light emitting diode D, i.e. the first voltage difference is 6V-0.1 v=5.1V, so as to drive the pixel units to display high gray level brightness.
When at least one pixel unit in the first row of pixel units is about to display gray scale greater than 90 and less than or equal to 180, the voltage control unit 16 corresponding to the first row of pixel units controls the second low voltage end VSS2 to be connected to the cathode of the light emitting diode D in the first row of pixel units, so as to provide the second voltage, i.e. 2V, for the light emitting diode D, and at the moment, the voltage difference between the two ends of the light emitting diode D and the second voltage difference are 6V-2 v=4v, so as to drive the pixel units to display medium gray scale brightness.
When the gray scale to be displayed by the pixel units in the first row of pixel units is smaller than or equal to 90, the voltage control unit 16 corresponding to the first row of pixel units controls the third low voltage terminal VSS3 to be connected to the cathode of the light emitting diode D in the first row of pixel units, so as to provide the third voltage, i.e. 3V, for the light emitting diode D, and the voltage difference between the two ends of the light emitting diode D and the second voltage difference are 6V-4 v=2v, so as to drive the pixel units to display low gray scale brightness.
Referring to fig. 8, fig. 8 is a schematic diagram of a pixel unit connection according to a fifth embodiment of the application.
As shown in fig. 8, the display panel 10 further includes a plurality of voltage control units 16, wherein each voltage control unit 16 is respectively connected to a row of pixel units, and the voltage control unit 16 is connected to an anode of each light emitting diode D in the row of pixel units, and is configured to provide different driving voltages for the anode of the light emitting diode D to adjust a voltage difference across the light emitting diode D, that is, respectively form different voltage differences with the low voltage output by the low voltage terminal VSS to drive the light emitting diode D to emit light.
The voltage control unit 16 includes a first control switch tube TK1, a second control switch tube TK2, and a third control switch tube TK3, where a gate of the first control switch tube TK1 is connected to the control end 17, a source of the first control switch tube TK1 is connected to the first power end VDD1, a drain of the first control switch tube TK1 is connected to an anode of the light emitting diode D, and the first control switch tube TK1 is used for being turned on under the control of the control end 17 to connect the first power end VDD1 with the anode of the light emitting diode D in a corresponding row, and is used for providing a first driving voltage for the anode of the light emitting diode D.
The grid electrode of the second control switch tube TK2 is connected to the control end 17, the source electrode of the second control switch tube TK2 is connected to the second power end VDD2, the drain electrode of the second control switch tube TK2 is connected to the anode of the light emitting diode D, and the second control switch tube TK2 is used for being conducted under the control of the control end 17 so as to connect the second power end VDD2 with the anodes of the light emitting diodes of the corresponding row and is used for providing a second driving voltage for the anode of the light emitting diode D.
The grid electrode of the third control switch tube TK3 is connected to the control end 17, the source electrode of the third control switch tube TK3 is connected to the third power end VDD3, the drain electrode of the third control switch tube TK3 is connected to the anode of the light emitting diode D, and the third control switch tube TK3 is used for being conducted under the control of the control end 17 so as to connect the third power end VDD3 with the anodes of the light emitting diodes of the corresponding row and is used for providing a third driving voltage for the anode of the light emitting diode D.
The first driving voltage is larger than the second driving voltage, and the second driving voltage is larger than the third driving voltage.
Specifically, when at least one pixel unit of the i-th row of the plurality of pixel units displays a gray level greater than a first preset gray level, the control terminal 17 outputs a first control signal to the voltage control unit 16 for controlling the first control switch tube TK1 to be turned on so as to connect the first power supply terminal VDD1 to the anode of the light emitting diode D in the i-th row of pixel units, and is used for providing a first driving voltage for the light emitting diode D, so that the voltage difference between the cathode and the anode of the light emitting diode D is the first driving voltage difference.
When at least one pixel unit of the ith row of pixel units displays a gray level greater than a second preset gray level and less than the first preset gray level, the control end 17 outputs a second control signal to the second control switch tube TK2 to connect the second power supply end VDD2 to the anode of the light emitting diode D in the ith row of pixel units, for providing a second driving voltage for the light emitting diode D, so that the voltage difference between the cathode and the anode of the light emitting diode D is the second driving voltage difference.
When the gray levels displayed by the pixel units in the ith row are smaller than the second preset gray level, the control end 17 outputs a third control signal to the third control switching tube TK3 to connect the third power supply end VDD3 to the anode of the light emitting diode D in the pixel unit in the ith row for providing the third driving voltage for the light emitting diode D, so that the voltage difference between the cathode and the anode of the light emitting diode D is the third driving voltage difference.
The first driving voltage is greater than the second driving voltage, which is greater than the third driving voltage, i.e. the first voltage difference is greater than the second voltage difference, which is greater than the third voltage difference, and the first gray level is greater than the second gray level.
When the gray scale displayed by the pixel unit is larger than the first gray scale, the driving voltage required by the light emitting diode D is larger, that is, the voltage difference required between the anode and the cathode of the light emitting diode D is larger, at this time, the first power supply terminal VDD1 is controlled to output the first driving voltage, so that the first driving voltage and the low voltage output by the low voltage terminal VSS form a larger voltage difference, that is, the first voltage difference, thereby effectively driving the light emitting diode D to display the preset brightness, and at this time, the light emitting diode D has a higher utilization ratio to the driving voltage.
When the gray scale displayed by the pixel unit is between the first gray scale and the second gray scale, the driving voltage required by the light emitting diode D is reduced, that is, the voltage difference required between the anode and the cathode of the light emitting diode D is reduced, at this time, the second power supply terminal VDD2 is controlled to output the second driving voltage, so that the second driving voltage and the low voltage output by the low voltage terminal VSS form a second voltage difference smaller than the first voltage difference, thereby reducing the power consumption and improving the driving voltage utilization rate when the light emitting diode D is driven.
When the gray scale displayed by the pixel unit is smaller than the second gray scale, the driving voltage required by the light emitting diode D is further reduced, that is, the voltage difference required between the anode and the cathode of the light emitting diode D is smaller, at this time, the third power supply terminal VDD3 is controlled to output the third driving voltage, so that the third driving voltage and the driving voltage output by the low voltage terminal VSS form a third driving voltage difference smaller than the second driving voltage difference, thereby further reducing the power consumption and improving the utilization ratio of the driving voltage when the light emitting diode D is driven.
In an exemplary embodiment, the first gray level may be set to 180 gray levels, the second gray level may be set to 90 gray levels, the first driving voltage may be set to 6V, the second driving voltage may be set to 4V, and the third driving voltage may be set to 2V, when the gray level displayed by the pixel unit is greater than 180 gray levels, a voltage of 6V is provided to the anode of the light emitting diode in the pixel unit, when the gray level displayed by the pixel unit is greater than 90 gray levels and less than or equal to 180 gray levels, a voltage of 4V is provided to the anode of the light emitting diode D in the pixel unit, but when the gray level displayed by the pixel unit is less than or equal to 90 gray levels, a voltage of 0.1V is provided to the cathode of the light emitting diode D, although the gray level and the voltage value may also be set according to specific needs, and the present application is not limited thereto.
The gray scale brightness displayed by the pixel units is divided, different voltage differences are provided for the two ends of the light emitting diode D in different gray scale ranges, and the voltage differences of the two ends of the light emitting diode D are reduced while the normal light emission of the light emitting diode D is maintained, so that the utilization rate of driving voltage is improved, and the power consumption of the pixel units is reduced.
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (10)
1. A display panel comprises a plurality of scanning lines extending along a first direction and sequentially arranged along a second direction, a plurality of data lines extending along the second direction and sequentially arranged along the first direction, and a plurality of pixel units arranged in an array, wherein the pixel units are used for receiving data signals from the data lines under the control of the scanning lines to execute image display;
the display panel is characterized in that the pixel unit is connected to a power end and a low-voltage end and is used for receiving a driving voltage from the power end under the control of the data signal, the driving voltage and the low-voltage end form a voltage difference to drive the pixel unit to emit light, and the display panel further comprises a voltage control unit which is connected to the power end or the low-voltage end and is used for controlling the voltage difference between the power end and the low-voltage end to be in a preset range.
2. The display panel of claim 1, wherein the low voltage terminal comprises a first low voltage terminal and a second low voltage terminal, the voltage control unit is connected to the first terminal of the light emitting element for emitting light in the pixel unit, the first low voltage terminal and the second low voltage terminal, and when the gray scale displayed by the pixel unit is greater than a preset gray scale, the voltage control unit controls the first low voltage terminal to be connected to the first terminal of the light emitting element so as to provide a first voltage to the light emitting element, and is used for controlling the voltage difference between the first terminal and the second terminal of the light emitting element to be a first voltage difference;
when the gray scale displayed by the pixel unit is smaller than or equal to the preset gray scale, the voltage control unit controls the second low-voltage end to be connected to the first end of the light-emitting element so as to provide a second voltage to the light-emitting element, and is used for controlling the voltage difference between the first end and the second end of the light-emitting element to be a second voltage difference, wherein the first voltage is smaller than the second voltage, and the first voltage difference is larger than the second voltage difference.
3. The display panel according to claim 2, wherein the voltage control unit includes a first control switching tube and a second control switching tube, a gate of the first control switching tube is connected to a control terminal, a source of the first control switching tube is connected to the first low voltage terminal, and a drain of the first control switching tube is connected to the first terminal of the light emitting element for being turned on under control of the control terminal to control the first low voltage terminal to be connected to the first terminal of the light emitting element;
The grid electrode of the second control switch tube is connected to the control end, the source electrode of the second control switch tube is connected to the second low-voltage end, the drain electrode of the second control switch tube is connected to the first end of the light-emitting element and used for being conducted under the control of the control end so as to control the second low-voltage end to be connected to the first end of the light-emitting element.
4. The display panel of claim 1, wherein the power supply terminal comprises a first power supply terminal and a second power supply terminal, the voltage control unit is connected to the second terminal of the light emitting element, the first power supply terminal and the second power supply terminal, and when the gray scale displayed by the pixel unit is greater than a preset gray scale, the voltage control unit controls the first power supply terminal to be connected to the second terminal of the light emitting element so as to provide a first driving voltage to the light emitting element, and is used for controlling the voltage difference between the first terminal and the second terminal of the light emitting element to be a first voltage difference;
when the gray scale displayed by the pixel unit is smaller than or equal to the preset gray scale, the voltage control unit controls the second power supply end to be connected to the second end of the light emitting element so as to provide a second driving voltage to the light emitting element, wherein the voltage difference between the first end and the second end of the light emitting element is controlled to be a second voltage difference, the first driving voltage is larger than the second driving voltage, and the first voltage difference is larger than the second voltage difference.
5. The display panel according to claim 4, wherein the voltage control unit includes a first control switching tube and a second control switching tube, a gate of the first control switching tube is connected to a control terminal, a source of the first control switching tube is connected to the first power terminal, and a drain of the first control switching tube is connected to the second terminal of the light emitting element, for being turned on under control of the control terminal to control the first power terminal to be connected to the second terminal of the light emitting element;
the grid electrode of the second control switch tube is connected to the control end, the source electrode of the second control switch tube is connected to the second power end, the drain electrode of the second control switch tube is connected to the second end of the light-emitting element and used for being conducted under the control of the control end so as to control the second power end to be connected to the second end of the light-emitting element.
6. The display panel of claim 1, wherein the low voltage terminal comprises a first low voltage terminal, a second low voltage terminal and a third low voltage terminal, the voltage control unit is connected to the first terminal, the first low voltage terminal, the second low voltage terminal and the third low voltage terminal of the light emitting element, and when the gray scale displayed by the pixel unit is greater than a first preset gray scale, the voltage control unit controls the first low voltage terminal to be connected to the first terminal of the light emitting element so as to provide a first voltage to the light emitting element for controlling the voltage difference between the first terminal and the second terminal of the light emitting element to be a first voltage difference;
When the gray scale displayed by the pixel unit is larger than a second preset gray scale and smaller than or equal to a first preset gray scale, the voltage control unit controls the second low-voltage end to be connected to the first end of the light-emitting element so as to provide a second voltage to the light-emitting element, and the voltage control unit is used for controlling the voltage difference between the first end and the second end of the light-emitting element to be a second voltage difference;
when the gray scale displayed by the pixel unit is smaller than a second preset gray scale, the voltage control unit controls the third low-voltage end to be connected to the first end of the light-emitting element so as to provide a third voltage to the light-emitting element, and the voltage difference between the first end and the second end of the light-emitting element is controlled to be a third voltage difference;
the first voltage is smaller than the second voltage, the second voltage is smaller than the third voltage, the first voltage difference is larger than the second voltage difference, the second voltage difference is larger than the third voltage difference, and the first preset gray level is larger than the second preset gray level.
7. The display panel according to claim 6, wherein the voltage control unit includes a first control switching tube, a second control switching tube and a third control switching tube, the gate of the first control switching tube is connected to the control terminal, the source of the first control switching tube is connected to the first low voltage terminal, the drain of the first control switching tube is connected to the first terminal of the light emitting element, and is used for being turned on under the control of the control terminal to control the first low voltage terminal to be connected to the first terminal of the light emitting element;
The grid electrode of the second control switch tube is connected to the control end, the source electrode of the second control switch tube is connected to the second low-voltage end, the drain electrode of the second control switch tube is connected to the first end of the light-emitting element and is used for being conducted under the control of the control end so as to control the second low-voltage end to be connected to the first end of the light-emitting element;
the grid electrode of the third control switch tube is connected to the control end, the source electrode of the third control switch tube is connected to the third low-voltage end, the drain electrode of the third control switch tube is connected to the first end of the light-emitting element and used for being conducted under the control of the control end so as to control the third low-voltage end to be connected to the first end of the light-emitting element.
8. The display panel of claim 1, wherein the power supply terminal comprises a first power supply terminal, a second power supply terminal and a third power supply terminal, the voltage control unit is connected to the first terminal, the first power supply terminal, the second power supply terminal and the third power supply terminal of the light emitting element, and when the gray scale displayed by the pixel unit is greater than a first preset gray scale, the voltage control unit controls the first power supply terminal to be connected to the second terminal of the light emitting element so as to provide a first driving voltage to the light emitting element, and is used for controlling the voltage difference between the first terminal and the second terminal of the light emitting element to be a first voltage difference;
When the gray scale displayed by the pixel unit is larger than a second preset gray scale and smaller than or equal to a first preset gray scale, the voltage control unit controls the second power supply end to be connected to the second end of the light emitting element so as to provide a second driving voltage to the light emitting element, and the voltage control unit is used for controlling the voltage difference between the first end and the second end of the light emitting element to be a second voltage difference;
when the gray scale displayed by the pixel unit is smaller than a second preset gray scale, the voltage control unit controls the third power supply end to be connected to the second end of the light emitting element so as to provide a third driving voltage to the light emitting element, and the voltage difference between the first end and the second end of the light emitting element is controlled to be a third voltage difference;
the first driving voltage is larger than the second driving voltage, the second driving voltage is larger than the third driving voltage, the first voltage difference is larger than the second voltage difference, the second voltage difference is larger than the third voltage difference, and the first preset gray level is larger than the second preset gray level.
9. The display panel of any one of claims 2-8, wherein the pixel cell comprises a first switching tube, a second switching tube, and a light emitting diode, wherein the light emitting diode is the light emitting element, an anode of the light emitting diode is a first end of the light emitting element, and an anode of the light emitting diode is a second end of the light emitting element;
The grid electrode of the first switching tube is connected with the scanning line, the source electrode of the first switching tube is connected with the data line, the drain electrode of the first switching tube is connected with the grid electrode of the second switching tube, and the first switching tube is used for being conducted under the control of a scanning signal output by the scanning line so as to transmit the data signal to the second switching tube;
the source electrode of the second switching tube is connected to the power end, the drain electrode of the second switching tube is connected to the light emitting diode and used for conducting under the control of the data signal and transmitting the driving voltage to the light emitting diode so as to control the light emitting diode to emit light.
10. A display device comprising a power supply module and a display panel according to any one of claims 1 to 9, the power supply module being adapted to supply a driving power for image display of the display panel.
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