Display panel and display device

Abstract

The embodiment of the invention discloses a display panel and a display device, the display panel comprises a display area, the display area comprises a plurality of pixel units arranged in an array, and the pixel units are used for executing image display according to data signals. The pixel unit comprises a driving unit and an adjusting unit. The adjusting unit is connected with the scanning lines and the data lines and used for receiving image signals from the data lines under the control of scanning signals output by the scanning lines in the data loading period and transmitting the image signals to the driving unit. The driving unit is connected with the scanning line and the first power supply end and is used for receiving the image signal from the adjusting unit under the control of the scanning signal in a data loading period, and the image signal is matched with the first power supply in a light emitting period to output a driving current to the light emitting element so as to drive the light emitting element to emit light corresponding to the image signal to display an image; and leakage current transmission from the adjusting unit to the data line is cut off in the light emitting period, so that the display effect of the display panel and the display device is better.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] Organic Light-Emitting Diode (OLED), as a current-type light-emitting device, has been increasingly used in high-performance display devices. Due to its many advantages such as self-luminescence, ultra-lightness, flexibility, bright colors, wide viewing angle, and high contrast, OLED is becoming more and more a mainstream display device.

[0003] During the display process of the OLED display panel, the driving switch transistor in the pixel unit drives the light-emitting device OLED to emit light according to the data signal. However, since the driving switch transistor still has leakage current transmission in the cut-off state, the driving current provided for driving the light-emitting device OLED is relatively poor in stability and the light brightness is uneven, which in turn affects the poor image display effect of the OLED display panel. Summary of the invention

[0004] In view of the above technical deficiencies, the present application provides a display panel and a display device with better image display effect.

[0005] The present application provides a display panel, including a display area, wherein the display area includes a plurality of pixel units arranged in an array, wherein the pixel units are used to perform image display according to data signals, including: the pixel units include a driving unit and an adjusting unit, wherein the adjusting unit is connected to a scan line and a data line, and is used to receive an image signal from the data line under the control of a scan signal output by the scan line during a data loading period, and transmit the image signal to the driving unit, wherein the driving unit is connected to the scan line and a first power supply terminal, and is used to receive the image signal from the adjusting unit under the control of the scan signal during the data loading period, wherein the image signal cooperates with the first power supply to output a driving current to a light-emitting element during a light-emitting period, so as to drive the light-emitting element to emit light corresponding to the image signal to display an image, and wherein the leakage current transmission from the adjusting unit to the data line is blocked during the light-emitting period.

[0006] In an embodiment of the present application, the adjustment unit is further configured to provide a compensation current to the driving unit during the light emitting period, and the compensation current has the same magnitude as the leakage current transmitted from the driving unit to the adjustment unit.

[0007] In one embodiment of the present application, the driving unit includes a control switch tube, a driving switch tube and a first energy storage element. The driving switch tube is connected to the control switch tube through a first node, connected to the first power supply end through a second node, and is also connected to the light-emitting element through a driving node. The first energy storage element is connected to the first node and the second node. The control switch tube is connected to the scan line, the first node and the third node. The control switch tube is used to receive the image signal from the adjustment unit under the control of the scan signal during the data loading period. The image signal is directly stored in the first energy storage element as a data signal. The first energy storage element controls the voltage of the first node to be a data voltage corresponding to the data signal. The data voltage cooperates with the first power supply to output the driving current.

[0008] In one embodiment of the present application, the adjustment unit includes at least one unidirectional conductive element, which is between the data line and the third node. The unidirectional conductive element is used to control the data line to provide the image signal for transmission to the third node, while blocking the transmission of leakage current from the adjustment unit to the data line.

[0009] In one embodiment of the present application, the adjustment circuit further includes a data loading switch tube, an adjustment switch tube, a second energy storage element, and a third energy storage element. The data loading switch tube is connected to the data line, the unidirectional conductive element, and the scan line, and is used to be turned on under the control of the scan signal during the data loading period, so as to receive the data signal from the data line and load the data voltage corresponding to the data signal to the third node through the unidirectional conductive element. The adjustment switch tube is connected to the scan line, the third node, and the buffer node, and is used to be turned on when the scan signal is received during the data loading period, so as to transmit the data voltage received by the third node to the buffer node and the control switch tube; the energy storage element is connected to the buffer node, and is used to store the data voltage when the data voltage is loaded on the buffer node and maintain the voltage of the buffer node as the data voltage. The third energy storage element is connected between the buffer node and the first node, and is used to control the voltage of the cache node to be the same as that of the first node, and to control the voltage of the cache node and the first node to be greater than the voltage of the third node.

[0010] In one embodiment of the present application, the driving unit includes a control switch tube, a driving switch tube and a first energy storage element, the driving switch tube is connected to the control switch tube through a first node, connected to the first power supply end through a second node, and is also connected to the light-emitting element through a driving node, the first energy storage element is connected to the first node and the second node, the control switch tube is connected to a compensation scan line, the first node and a third node, wherein the compensation scan line is used to output a compensation scan signal in a first time period of the data writing period, the control switch tube is used to receive a compensation data signal from the adjustment unit as the image signal under the control of the compensation scan signal in the first time period, and convert the compensation data signal into a data signal and store it in the first energy storage element, and control the voltage of the first node to be a data voltage corresponding to the data signal, and the data voltage is used to cooperate with the driving power supply to provide the driving current corresponding to the data signal.

[0011] In one embodiment of the present application, the adjustment unit includes at least one unidirectional conductive element, which is between the data line and the third node. The unidirectional conductive element is used to control the data line to provide the image signal for transmission to the third node, while blocking the transmission of leakage current from the adjustment unit to the data line.

[0012] In one embodiment of the present application, the adjustment circuit further includes a data loading switch tube, an adjustment switch tube and a second energy storage element. The data loading switch tube is connected to the data line, the unidirectional conductive element and the scan line, and is used to be turned on under the control of the scan signal in the first and second periods of the data loading period, so as to load the compensation data voltage corresponding to the compensation data signal received from the data line to the third node through the unidirectional conductive element, and the first period and the second period are sequentially arranged and continuous in time. The adjustment switch tube is connected to the scan line, the third node and the buffer node, and is used to be turned on when the scan signal is received in the first and second periods, so as to transmit the compensation data voltage received by the third node to the buffer node and the control switch tube. In the first period, the compensation data voltage is converted into a data voltage through the control switch tube and the first energy storage element and loaded on the first node. The second energy storage element is connected to the buffer node, and is used to store the data voltage when the data voltage is loaded on the buffer node and maintain the voltage of the buffer node as the compensation data voltage corresponding to the compensation data signal.

[0013] In an embodiment of the present application, the compensation data voltage corresponding to the compensation data signal is greater than the data voltage.

[0014] In one embodiment of the present application, the compensation scanning signal is a pulse signal with the same potential as the compensation signal, wherein the duration of the pulse signal of the compensation scanning signal is a first duration, and the duration of the pulse signal of the scanning signal is the sum of the first duration and the second duration;

[0015] The compensation data signal corresponds to a change in the threshold voltage of the driving switch tube. During the light-emitting period, the compensation current provided by the adjustment switch tube according to the compensation data voltage corresponds to the leakage current transmitted by the driving switch tube.

[0016] In a second aspect, the present application provides a display device, comprising a power module and the aforementioned display panel, wherein the power module is used to provide driving power for the display panel to display images.

[0017] Compared with the problems in the prior art, since the pixel unit in the present application can perform light-emitting period when the light-emitting element performs light-emitting to display an image, the adjustment unit cuts off the leakage current transmitted by the driving unit in the direction of the data line, thereby accurately maintaining the driving unit to accurately provide the driving current to the light-emitting element according to the data signal, ensuring that the driving current output to the light-emitting element is also relatively stable, so that the pixel unit accurately performs image display and ensures the uniformity of the image display brightness of the display panel, resulting in better effect.

[0018] Furthermore, the adjustment unit also provides a compensation current for the driving unit, which further ensures the working stability and reliability of the adjustment unit and ensures that the output driving current is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the structure of a display device provided in this application;

[0021] Figure 2 for Figure 1 A schematic diagram of the planar layout structure of the display panel shown;

[0022] Figure 3 for Figure 1 A schematic diagram of the circuit structure of any pixel unit shown;

[0023] Figure 4 for Figure 3 The driving timing diagram of the pixel unit in the process of performing image display is shown;

[0024] Figure 5 for Figure 3 A schematic diagram of current flow in a pixel unit during image display;

[0025] Figure 6 for Figure 5 A schematic diagram showing the change of current and voltage in the control switch tube of the pixel unit;

[0026] Figure 7 In the first embodiment of this application, Figure 2 The circuit block diagram of the pixel unit in the display panel shown;

[0027] Figure 8 For Figure 7 The working timing diagram of the pixel unit shown;

[0028] Fig. 9 In the second embodiment of this application, Figure 1 A schematic diagram of the planar layout structure of the display panel shown;

[0029] Fig.10 For Fig. 9 A schematic diagram of the circuit structure of a pixel unit in the display panel shown;

[0030] Fig.11 for Fig.10 The working timing diagram of the pixel unit shown;

[0031] Fig.12 for Fig.10 Schematic diagram of the working state of the pixel unit shown.

[0032] Description of reference numerals:

[0033] Display device-100, display panel-10, power module-20, support frame-30, display area-10a, non-display area-10b, pixel unit-P, first direction-F1, second direction-F2, data line-D1~Dm, data line-Di, scan line-G1~Gn, scan signal-Gsi, compensation scan line-Gct1~Gctn, data line-D1~Dm, timing control circuit-11, data drive circuit-12, scan drive circuit-13, control switch tube-M1, drive switch tube-M2, first energy storage element-C1, first node-N1, second node-N2, drive node-Nd, third node-N3, first power supply terminal-VDD, second power supply terminal-VSS, light-emitting element-L, data loading stage-Td, light-emitting period-Te, leakage current-I leak, compensation current -Icp, data voltage -Vdata, voltage of the first node -Va, driving unit -200, adjustment unit -300, data loading switch tube -M3, data loading control end -M30, first data loading conductive end -M31, second data loading conductive end -M32, adjustment switch tube -M4, adjustment control end -M40, first adjustment conductive end -M41, second adjustment conductive end -M42, unidirectional conductive element D1, first conductive end -D11, second conductive end -D12, second energy storage element -C2, third energy storage element -C3, buffer node -Nh. DETAILED DESCRIPTION

[0034] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0035] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be used to implement. The serial numbers for the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present application, unless otherwise specified, include direct and indirect connections (couplings). The directional terms mentioned in the present application, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0036] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. It should be noted that the terms "first", "second", etc. in the specification, claims, and drawings of the present application are used to distinguish different objects, rather than to describe a specific order.

[0037] In addition, the terms "include", "may include", "contain", or "may include" used in the present application indicate the existence of the corresponding functions, operations, elements, etc. disclosed, and do not limit one or more other functions, operations, elements, etc. In addition, the terms "include" or "contain" indicate the existence of the corresponding features, numbers, steps, operations, elements, components, or combinations thereof disclosed in the specification, and do not exclude the existence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, and are intended to cover non-exclusive inclusions. In addition, when describing the embodiments of the present application, "may" is used to indicate "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0039] See also Figure 1 , Figure 1 A schematic diagram of the structure of a display device provided in the present application. The display device 100 includes a display panel 10 and a power module (not shown), and the power module is arranged on the back side of the display panel 10, that is, the non-display side of the display panel 10. The power module is used to provide a power supply voltage for the display panel 10 to display images. In other embodiments of the present application, the display device 100 can be a desktop computer, a portable electronic device, such as a mobile phone, a tablet computer, etc.

[0040] See also Figure 2 , Figure 2 for Figure 1 A schematic diagram of the planar layout structure of the display panel 10 is shown.

[0041] like Figure 2 As shown, the display area 10 a of the display panel 10 includes a plurality of n*m pixel units P arranged in a matrix, m data lines D1 -Dm, and n scan lines G1 -Gn, where m and n are natural numbers greater than 1.

[0042] The n scan lines G1-Gn extend along the first direction F1 and are insulated and arranged in parallel along the second direction F2. The m data lines D1-Dm extend along the second direction F2 and are insulated and arranged in parallel along the first direction F1. The first direction F1 is perpendicular to the second direction F2.

[0043] Corresponding to the non-display area 10 b of the display panel 10 , the display device 100 further includes a timing control circuit 11 for driving the pixel unit P to display an image, a data driving circuit 12 , and a scan driving circuit 13 disposed in the display panel 10 .

[0044] Among them, the timing control circuit 11 is electrically connected to the data driving circuit 12 and the scan driving circuit 13, and is used to receive RGB encoded image signals from the outside, and output corresponding clock signals, synchronization signals and decoded image signals (data signals Data) to the data driving circuit 12 and the scan driving circuit 13 respectively to control the working timing of the two. Specifically, the timing control circuit 11 outputs corresponding timing control signals to the data driving circuit 12 and the scan driving circuit 13 to control when the scan driving circuit 13 outputs the corresponding scan signal and when the data driving circuit 12 outputs the data signal Data corresponding to the image signal.

[0045] The data driving circuit 12 is electrically connected to the m data lines D1 -Dm, and is used to transmit image signals to be displayed to the plurality of pixel units P through the m data lines D1 -Dm in the form of data voltages corresponding to the data signals Data in analog form.

[0046] The scan driving circuit 13 is electrically connected to the n scan lines G1-Gn, and is used to output scan signals to the pixel unit P through the n scan lines G1-Gn, so as to control when the pixel unit P receives the data signal Data. The scan driving circuit 13 outputs scan signals from the n scan lines G1-Gn arranged in position order, and sequentially from the scan lines G1, G2, ..., Gn according to the temporally continuous scan cycles in each frame image display period.

[0047] See also Figure 3 , Figure 3 for Figure 1 The circuit structure diagram of any pixel unit shown in FIG. Figure 3 As shown, the pixel unit P includes a control switch tube M1, a driving switch tube M2 and a first energy storage element C1.

[0048] The driving switch tube M2 is connected to the control switch tube M1 through the first node N1, and the driving switch tube M2 is also connected to the first power supply terminal VDD through the second node N2, and is connected to the light-emitting element L through the driving node Nd. The light-emitting element L is connected to the driving node Nd and the second power supply terminal VSS. The first energy storage element C1 is connected to the first node N1 and the second node N2. In this embodiment, the light-emitting element L is a light-emitting diode, wherein the anode of the light-emitting diode as the light-emitting element L is connected to the driving node Nd, and the cathode is connected to the second power supply terminal VSS, and the second power supply terminal VSS can be the ground terminal GND.

[0049] The control switch tube M1 is connected to the data line Dj, the scan line Gi and the first node N1. The control switch tube M1 is used to receive the scan signal Gsi and the data signal Data during the data writing period of a frame image display period. The scan signal Gsi is used to control the corresponding control switch tube M1 to transmit the received data signal Data to the first energy storage element C1. The data signal Data is used to control the driving switch tube M2 to cooperate with the driving power Ids provided by the first power supply terminal VDD to output the corresponding driving current to the light-emitting element L during the light-emitting period of a frame image display period, so as to drive the light-emitting element L to emit light to display an image.

[0050] In this embodiment, the control switch tube M1 and the drive switch tube M2 are P-type low-temperature polysilicon (LTPS) thin film transistors. Of course, in other embodiments of the present application, the control switch tube M1 and the drive switch tube M2 can also be N-type low-temperature polysilicon LTPS thin film transistors.

[0051] Please also read Figure 4-Figure 6 As shown, Figure 4 for Figure 3 The driving timing diagram of the pixel unit in the process of image display is shown. Figure 5 for Figure 3 A schematic diagram of current flow in a pixel unit during image display; Figure 6 for Figure 5 The diagram shows the current and voltage changes of the control switch tube M1 in the pixel unit during operation.

[0052] like Figure 4 As shown, in any frame image period, each pixel unit at least includes a data loading phase Td and a light emitting period Te which are continuous and sequentially arranged in time.

[0053] like Figure 5 As shown, in the data loading stage Td, the scan line Gi outputs the scan signal Gsi to the control switch tube M1, the control switch tube M1 is turned on under the control of the scan signal Gsi, and the data signal Data is transmitted to the first energy storage element C1 connected to the first node N1 through the control switch tube M1 for storage. It can be understood that the first energy storage element C1 can maintain the voltage of the first node N1 as the data voltage Vdata corresponding to the data signal Data within a preset period of time.

[0054] During the light-emitting period Te, the scan line Gi stops outputting the scan signal Gsi, the control switch tube M1 is turned off, and the driving switch tube M2 is turned on under the control of the data voltage Vdata of the first node N1. The driving power source VDD cooperates with the data voltage to continuously provide the driving current Ids to the light-emitting element L, wherein the driving current Ids provided to the light-emitting element L is controlled by the driving transistor M2, which satisfies the following formula (1):

[0055]

[0056] Wherein, VDD is the voltage provided by the driving power supply, W and L are respectively the width and length of the conductive channel of the driving switch tube M2, μ is the effective carrier mobility of the driving switch tube M2, Cox is the unit area capacitance of the gate oxide layer in the driving switch tube M2, Vdata is the data voltage Vdata corresponding to the input data signal Data, and Vth is the threshold voltage of the driving switch tube M2.

[0057] In the data loading stage Td, after the control switch tube M1 is turned on, the data signal Data provided by the data line Dj is transmitted along the arrow direction to the first energy storage element C1 connected to the first node N1, so that the voltage Va of the first node N1 is the same as the data voltage Vdata of the data signal Data. At this time, the voltage Va of the first node N1 is used as the off voltage (Voff) of the driving switch tube M2, that is, the voltage Va of the first node N1 has not reached the threshold voltage of the driving switch tube M2, and the driving switch tube M2 is in the off state and is not turned on.

[0058] like Figure 5-Figure 6 As shown, in the light-emitting stage Te, when the scanning line Gi does not output the scanning signal Gsi, the control switch tube M1 is turned off, and the first energy storage element C1 maintains the voltage Va of the first node N1, so that the driving switch tube M2 is in the on state, and the voltage Va of the first node N1 reaches the turn-on voltage (Von) of the driving switch tube M2. In which, due to the characteristics of the control switch tube M1 itself, there is a turn-on delay and a turn-off delay in the light-emitting stage Te.

[0059] However, since the control switch tube M1 still has some leakage current I when it is turned off leak If the voltage of the data voltage Vdata in the data line Dj is greater than the voltage Va of the first node N1, the leakage current I leak The direction of the leakage current I is from the data line Dj to the first energy storage element C1. If the voltage Va of the first node N1 is greater than the data voltage Vdata in the data line Dj, the leakage current I leak The flow direction of the first energy storage element C1 flows to the control switch tube M1, so that the leakage current I of the control switch tube M1 leak will be transmitted to the data line Dj. Thus, the leakage current I of the control switch tube M1 isleak The voltage at both ends of the first energy storage element C1 will be affected, and the voltage Va at the first node N1 will change, which will directly affect the opening degree of the driving switch tube M2 and the size of the driving current Ids, and further affect the brightness accuracy of the light emitted by the light-emitting element L. At the same time, the leakage current I generated by the control switch tube M1 leak It will affect the data voltage Vdata on the data line Dj, thereby affecting the accurate transmission of the data signal Data. It can be understood that the leakage current I leak It is used to control the current transmitted between the drain and the source when the switch tube M1 is turned off.

[0060] It can be seen that due to the large leakage current of the LTPS thin film transistor, especially in the low frequency (low refresh rate) display state, the gate and source potential difference of the driving transistor M2 is easily unstable due to the large leakage current, resulting in the unstable driving current Ids of the OLED light emitting element, and the display device 100 flickers. At the same time, the leakage current I leak This will affect the data voltage Vdata on the data line Dj, thereby affecting the accurate transmission of the data signal Data, resulting in the image being unable to be displayed normally and accurately, and resulting in a poor display effect.

[0061] The embodiment of the present application provides a pixel unit P, which can effectively slow down or eliminate the leakage current I in the control switch tube M1. leak The driving current Ids and the data signal Data on the data line Dj are affected, so that the brightness of each pixel unit P in the display area 10a of the entire display panel 10 is more uniform, and the display effect is better.

[0062] Specifically, see Figure 7 , which is as in the first embodiment of the present application Figure 2 FIG. 1 is a schematic diagram of a circuit structure of a pixel unit P in a display panel 10. Figure 7 As shown, the pixel unit P includes a driving unit 200 and an adjusting unit 300, wherein the adjusting unit 300 is connected between the driving unit 200 and the data line Dj, and the adjusting unit 300 and the driving unit 200 are connected to the scanning line Gi, and the adjusting unit 300 is used to adjust the light during the light emitting period Te ( Figure 8 ) provides a compensation current Icp to the driving unit 200 to compensate for the leakage current I generated when the driving unit 200 is working. leak , thereby improving the working stability and accuracy of the driving unit 200.

[0063] Specifically, the driving unit 200 includes a control switch tube M1, a driving switch tube M2 and a first energy storage element C1. The driving switch tube M2 is connected to the control switch tube M1 through a first node N1, and the driving switch tube M2 is also connected to a first power supply terminal VDD through a second node N2, and is connected to a light-emitting element L through a driving node Nd. The light-emitting element L is connected to the driving node Nd and the second power supply terminal VSS. The first energy storage element C1 is connected to the first node N1 and the second node N2.

[0064] The control switch tube M1 is connected to the first node N1 and the scan line Gi, and is connected to the adjustment unit 300 through the third node N3, and is used to receive the scan signal Gsi from the scan line Gi in the data loading stage Td of a frame image display period, and receive the data signal Data from the self-adjustment unit 300. The scan signal Gsi is used to control the corresponding control switch tube M1 to transmit the received data signal Data to the first energy storage element C1. The data signal Data controls the driving switch tube M2 to cooperate with the driving power provided by the first power supply terminal VDD to output the corresponding driving current Ids to the light-emitting element L during the light-emitting period Te of the frame image display period, so as to drive the light-emitting element L to emit light to display an image.

[0065] In this embodiment, the control switch tube M1 and the driving switch tube M2 can be N-type or P-type low temperature polycrystalline silicon (LTPS) thin film transistors. Among them, the gates of the control switch tube M1 and the driving switch tube M2 can be used as control terminals, and the source and drain are used as conductive terminals respectively. Specifically, the gate of the control switch tube M1 is used as a control terminal to connect the scan line Gi, and the source and drain are used as conductive terminals to connect the data line Dj and the first node N1 respectively. The gate of the driving switch tube M2 is used as a control terminal to connect the first node N1, and the source and drain are used as conductive terminals to connect the second node N2 and the driving node Nd respectively.

[0066] The adjustment unit 300 includes a data loading switch tube M3, an adjustment switch tube M4, a unidirectional conductive element D1, a second energy storage element C2 and a third energy storage element C3.

[0067] The data loading switch tube M3 is connected to the data line Dj, the unidirectional conductive element D1 and the scan line Gi, and is used to receive the data signal Data from the data line Dj in the data loading phase Td, and transmit the data signal Data to the driving unit 200 through the unidirectional conductive element D1 and the third node N3.

[0068] The data loading switch tube M3 includes a data loading control terminal M30, a first data loading conductive terminal M31 and a second data loading conductive terminal M32, wherein the data loading control terminal M30 is connected to the scan line Gi, the first data loading conductive terminal M31 is connected to the data line Dj, and the second data loading conductive terminal M32 is connected to the unidirectional conductive element D1. The data loading switch tube M3 is turned on under the control of the scan signal Gsi output by the scan line Gi. When the data loading switch tube M3 is turned on, the data signal Data provided by the data line Dj is transmitted to the unidirectional conductive element D1 through the data loading switch tube M3.

[0069] In this embodiment, the data loading switch tube M3 is an N-type LTPS thin film transistor, whose gate can be used as the data loading control terminal M30, or directly connected to the data loading control terminal M30, and its source and drain are respectively used as the first data loading conductive terminal M31 and the second data loading conductive terminal M32, or the source and drain are respectively directly connected to the first data loading conductive terminal M31 and the second data loading conductive terminal M32. When the data loading switch tube M3 is an N-type transistor, the corresponding scanning signal Gsi is a high-potential pulse signal.

[0070] In other embodiments of the present application, the data loading switch M3 may also be a P-type LTPS thin film transistor, and the corresponding scanning signal Gsi is a low-potential pulse signal.

[0071] The unidirectional conductive element D1 is connected between the data loading switch M3 and the third node N3, and is used to unidirectionally transmit the data signal Data to the third node N3 and the driving unit 200, while preventing the current in the driving unit 200 from being transmitted to the data loading switch M3 and the data line Dj through the third node N3.

[0072] Among them, the unidirectional conductive element D1 includes a first conductive end D11 and a second conductive end D12, the first conductive end D11 is connected to the second data loading conductive end M32 of the data loading switch tube M3, and the second conductive end D12 is connected to the third node N3. The unidirectional conductive element D1 is used to limit the current direction to only the first conductive end D11 and to the second conductive end D12, and to cut off the current from the second conductive end D12 to the first conductive end D11, thereby isolating the leakage current transmitted by the driving unit 200 from the data line Dj.

[0073] In this embodiment, the unidirectional conductive element D1 is a diode, wherein the first conductive end D11 is the anode of the diode, and the second conductive end D12 is the cathode of the diode.

[0074] The adjustment switch tube M4 is connected to the scan line Gi, the third node N3 and the buffer node Nh, and is used for transmitting the data voltage Vdata received by the third node N3 to the buffer node Nh when receiving the scan signal Gsi.

[0075] The adjustment switch tube M4 includes an adjustment control terminal M40, a first adjustment conductive terminal M41 and a second adjustment conductive terminal M42, wherein the adjustment control terminal M40 is connected to the scan line Gi, the first adjustment conductive terminal M41 is connected to the third node N3, and the second adjustment conductive terminal M42 is connected to the buffer node Nh. The adjustment switch tube M4 is turned on under the control of the scan signal Gsi output by the scan line Gi. When the adjustment switch tube M4 is turned on, the data voltage Vdata loaded on the third node N3 is transmitted to the buffer node Nh through the adjustment switch tube M3. Correspondingly, when the adjustment switch tube M4 stops receiving the scan signal Gsi, it is turned off.

[0076] In this embodiment, the adjustment switch tube M3 is an N-type LTPS thin film transistor, whose gate can be used as the adjustment control terminal M40, or directly connected to the adjustment control terminal M40, and whose source and drain are respectively used as the first adjustment conductive terminal M51 and the second adjustment conductive terminal M42, or the source and drain are respectively directly connected to the first adjustment conductive terminal M51 and the second adjustment conductive terminal M42. When the adjustment switch tube M4 is an N-type transistor, the corresponding scanning signal Gsi is a high-potential pulse signal.

[0077] In other embodiments of the present application, the adjustment switch M4 may also be a P-type LTPS thin film transistor, and the corresponding scan signal Gsi is a low-potential pulse signal.

[0078] The second energy storage element C2 is connected to the buffer node Nh and the ground terminal GND, and is used to maintain the voltage of the buffer node Nh as the data voltage Vdata during a preset period after the self-adjusting switch tube M4 receives the data signal Data. In this embodiment, the second energy storage element C2 is a capacitor.

[0079] The third energy storage element C3 is connected between the buffer node Nh and the first node N1 to maintain the buffer node Nh and the first node N1 at the same voltage. In this embodiment, the third energy storage element C3 is a capacitor.

[0080] Please also read Figure 7-Figure 8 ,in, Figure 8 For Figure 7 The working timing diagram of the pixel unit P is shown.

[0081] In the data loading stage Td, the scan line Gi outputs the scan signal Gsi to the control switch tube M1, the data loading switch tube M3 and the adjustment switch tube M4. The control switch tube M1, the data loading switch tube M3 and the adjustment switch tube M4 are turned on under the control of the scan signal Gsi. The data signal Data is transmitted to the third node N3 through the data loading switch tube M3 and the unidirectional conductive element D1, and is respectively transmitted to the first node N1 and the buffer node Nh through the third node N3. The first energy storage element C1 and the second energy storage element C2 respectively store the data voltage Vdata corresponding to the data signal Data, so that the voltages of the first node N1, the third node N3 and the buffer node Nh are all the data voltage Vdata.

[0082] During the light-emitting period Te, the scan line Gi stops outputting the scan signal Gsi, the control switch tube M1, the data loading switch tube M3 and the adjustment switch tube M4 are all turned off, and the driving switch tube M2 is turned on under the control of the data voltage Vdata at the first node N1, and the first power supply terminal VDD provides a driving power supply to cooperate with the data voltage to continuously provide a driving current Ids to the light-emitting element L.

[0083] At the same time, since the third energy storage element C3 is connected between the buffer node Nh and the first node N1, the voltages of the buffer node Nh and the first node N1 are the same and are both the data voltage Vdata, and the leakage current generated by the adjustment switch tube M4 is used as the compensation current Icp to flow from the buffer node Nh to the third node N3. At the same time, the driving unit 200 has a leakage current I leak The buffer node N adjusts the compensation current Icp transmitted by the switch tube M4 to the third node N3 and the leakage current Icp transmitted by the driving unit 200 to the third node N3. leak The magnitudes of the voltages are basically the same, but the directions are opposite, so that the voltage Va of the first node N1 is offset at the third node N3, thereby ensuring that the voltage Va of the first node N1 does not change, that is, the leakage current Icp provided by the switch tube M4 is adjusted to the leakage current Icp transmitted from the driving unit 200 to the data line Dj. leak Offset compensation is performed to maintain the voltage of the first node N1 at the data voltage Vdata, so that the gate-source voltage of the driving switch tube M2 in the driving unit 200 is stable, ensuring that the output driving current Ids is also relatively stable.

[0084] See also Fig. 9 , Fig. 9 In the second embodiment of this application, Figure 1 FIG. 1 is a schematic diagram of a planar layout structure of a display panel 20 .

[0085] In this embodiment, Fig. 9The structure of the display panel 20 is similar to Figure 2 The structure of the display panel 10 shown is basically the same, the only difference is that in the display area 10a, n compensation scanning lines Gc1-Gcn are connected to the pixel unit P, and the data lines D1-Dm are used to output the compensation data signal Tdata corresponding to the image signal to the pixel unit P. Corresponding to the compensation data signal Tdata, the pixel unit P can obtain the data voltage Vdata corresponding to the data signal Data according to the compensation data signal Tdata, and obtain the corresponding driving current Ids in cooperation with the driving power supply. It can be understood that in this embodiment, the compensation data voltage Vcp corresponding to the compensation data signal Tdata is greater than the data voltage Vdata corresponding to the data signal Data.

[0086] Specifically, Fig. 9 As shown, the display area 10a of the display panel 10 includes a plurality of n*m pixel units P arranged in a matrix, m data lines D1-Dm, n scan lines G1-Gn and n compensation scan lines Gc1-Gcn, where m and n are natural numbers greater than 1.

[0087] The n scan lines G1-Gn and the n compensation scan lines Gc1-Gcn extend along the first direction F1 and are insulated from each other and arranged in parallel along the second direction F2, the m data lines D1-Dm extend along the second direction F2 and are insulated from each other and arranged in parallel along the first direction F1, and the first direction F1 is perpendicular to the second direction F2. The pixel unit P is located at the intersection of the scan line and the data line, and each pixel unit P is connected to at least one scan line Gi, one data line Dj and one compensation scan line Gci.

[0088] Corresponding to the non-display area 10 b of the display panel 20 , the display panel 20 further includes a timing control circuit 11 for driving the pixel unit P to display an image, a data driving circuit 12 , and a scan driving circuit 13 disposed in the display panel 20 .

[0089] Among them, the timing control circuit 11 is electrically connected to the data driving circuit 12 and the scan driving circuit 13, and is used to control the RGB encoded image data signal received from the outside. It is used to output the corresponding clock signal, synchronization signal and decoded data signal Data to the data driving circuit 12 and the scan driving circuit 13 respectively to control the working timing of the two. Specifically, the timing control circuit 11 outputs the corresponding timing control signal to the data driving circuit 12 and the scan driving circuit 13 to control when the scan driving circuit 13 outputs the corresponding scan signal and when the data driving circuit 12 outputs the compensation data signal (Tdata) corresponding to the image signal.

[0090] The data driving circuit 12 is electrically connected to the m data lines D1-Dm, and is used to transmit the compensation data signal (Tdata) to be displayed to the plurality of pixel units P through the m data lines D1-Dm in the form of a data voltage corresponding to the data signal in analog form. In this embodiment, the compensation data signal Tdata is a compensation data signal provided according to the threshold voltage drift of the driving switch tube M2 in the pixel unit P, that is, the compensation data signal Tdata corresponds to the threshold voltage change of the driving switch tube M2.

[0091] The pixel unit P obtains a data signal Data corresponding to a desired target according to the compensated data signal Tdata, so that the data signal Data cooperates with the driving power supply to provide a driving current Ids for the light emitting element L.

[0092] The scan driving circuit 13 is electrically connected to the n scan lines G1-Gn and the n compensation scan lines Gc1-Gcn, and is used to output scan signals through the n scan lines G1-Gn and output compensation scan signals to the pixel unit P through the n compensation scan lines Gc1-Gcn, so as to control when the pixel unit P receives the compensation data signal Tdata.

[0093] Specifically, see Fig.10 , which is as follows Fig. 9 FIG. 2 is a schematic diagram of a circuit structure of a pixel unit P in a display panel 20. In this embodiment, Fig.10 The pixel unit P shown is Figure 7 The circuit structures of the pixel units P shown are basically the same, the only difference is that the adjustment unit 300 does not include the third energy storage element C3, and the scanning signal received by the control switch tube M1 in the driving unit 200 is different.

[0094] The pixel unit P includes a driving unit 200 and an adjustment unit 300, wherein the adjustment unit 300 is connected between the driving unit 200 and the data line Dj, and the adjustment unit 300 and the driving unit 200 are respectively connected to different scanning lines Gi and compensation scanning lines Gci, and the adjustment unit 300 is used to compensate for the leakage current generated when the driving unit 200 is working, so as to improve the working stability and accuracy of the driving unit 200.

[0095] like Fig.10 As shown, the driving unit 200 includes a control switch tube M1, a driving switch tube M2, a light emitting element L and a first energy storage element C1. The control switch tube M1 is connected to the compensation scan line Gci, the third node N3 and the first node N1, the driving switch tube M2 is connected to the control switch tube M1 through the first node N1, and the driving switch tube M2 is also connected to the first power supply terminal VDD through the second node N2, and is connected to the light emitting element L. The light emitting element L is also connected to the second power supply terminal VSS. The first energy storage element C1 is connected to the first node N1 and the second node N2.

[0096] More specifically, the control switch tube M1 is connected to the first node N1, the compensation scan line Gci and the adjustment unit 300, and is used to receive the scan signal Gti from the compensation scan line Gci during the data loading stage Td of a frame image display period, and receive the compensation data signal Tdata from the adjustment unit 300. The adjustment unit 300 and the control switch tube M1 cooperate with the scan signal Gsi and the compensation scan signal Gti to provide the first node N1 with a data voltage Vdata corresponding to the data signal Data, and the data voltage Vdata corresponding to the data signal Data is stored through the first energy storage element C1. The data signal Data is used to control the driving switch tube M2 to cooperate with the driving power provided by the first power supply terminal VDD to output the corresponding driving current to the light-emitting element L during the light-emitting period Te of a frame image display period, so as to drive the light-emitting element L to emit light to display an image.

[0097] In this embodiment, the control switch tube M1 and the driving switch tube M2 may be N-type or P-type low temperature polycrystalline silicon (LTPS) thin film transistors.

[0098] The adjustment unit 300 includes a data loading switch tube M3, an adjustment switch tube M4, a unidirectional conductive element D1 and a second energy storage element C2.

[0099] The data loading switch tube M3 is connected to the data line Dj, the third node N3 and the scan line Gi, and is used to receive the data signal Data from the data line Dj in the data loading phase Td, and transmit the data signal Data to the driving unit 200 through the unidirectional conductive element D1 and the third node N3.

[0100] The data loading switch tube M3 includes a data loading control terminal M30, a first data loading conductive terminal M31 and a second data loading conductive terminal M32, wherein the data loading control terminal M30 is connected to the scan line Gi, the first data loading conductive terminal M31 is connected to the data line Dj, and the second data loading conductive terminal M32 is connected to the unidirectional conductive element D1. The data loading switch tube M3 is turned on under the control of the scan signal Gsi output by the scan line Gi. When the data loading switch tube M3 is turned on, the data signal Data provided by the data line Dj is transmitted to the unidirectional conductive element D1 through the data loading switch tube M3.

[0101] In this embodiment, the data loading switch tube M3 is an N-type LTPS thin film transistor, whose gate can be used as the data loading control terminal M30, or directly connected to the data loading control terminal M30, and its source and drain are respectively used as the first data loading conductive terminal M31 and the second data loading conductive terminal M32, or the source and drain are respectively directly connected to the first data loading conductive terminal M31 and the second data loading conductive terminal M32. When the data loading switch tube M3 is an N-type transistor, the corresponding scanning signal Gsi is a high-potential pulse signal.

[0102] In other embodiments of the present application, the data loading switch M3 may also be a P-type LTPS thin film transistor, and the corresponding scanning signal Gsi is a low-potential pulse signal.

[0103] The unidirectional conductive element D1 is connected between the data loading switch M3 and the third node N3, and is used to unidirectionally transmit the data signal Data to the third node N3 and the driving unit 200, while preventing the current in the driving unit 200 from being transmitted to the data loading switch M3 and the data line Dj through the third node N3.

[0104] Among them, the unidirectional conductive element D1 includes a first conductive end D11 and a second conductive end D12, the first conductive end D11 is connected to the second data loading conductive end M32 of the data loading switch tube M3, and the second conductive end D12 is connected to the third node N3. The unidirectional conductive element D1 is used to limit the current direction to only the first conductive end D11 and to the second conductive end D12, and to cut off the current from the second conductive end D12 to the first conductive end D11, thereby isolating the leakage current transmitted by the driving unit 200 from the data line Dj.

[0105] In this embodiment, the unidirectional conductive element D1 is a diode, wherein the first conductive end D11 is the anode of the diode, and the second conductive end D12 is the cathode of the diode.

[0106] The adjustment switch tube M4 is connected to the scan line Gi, the third node N3 and the buffer node Nh, and is used for transmitting the data voltage Vdata received by the third node N3 to the buffer node Nh when receiving the scan signal Gsi.

[0107] The adjustment switch tube M4 includes an adjustment control terminal M40, a first adjustment conductive terminal M41 and a second adjustment conductive terminal M42, wherein the adjustment control terminal M40 is connected to the scan line Gi, the first adjustment conductive terminal M41 is connected to the third node N3, and the second adjustment conductive terminal M42 is connected to the buffer node Nh. The adjustment switch tube M4 is turned on under the control of the scan signal Gsi output by the scan line Gi. When the adjustment switch tube M4 is turned on, the data voltage Vdata loaded on the third node N3 is transmitted to the buffer node Nh through the adjustment switch tube M3.

[0108] In this embodiment, the adjustment switch tube M3 is an N-type LTPS thin film transistor, whose gate can be used as the adjustment control terminal M40, or directly connected to the adjustment control terminal M40, and whose source and drain are respectively used as the first adjustment conductive terminal M51 and the second adjustment conductive terminal M42, or the source and drain are respectively directly connected to the first adjustment conductive terminal M51 and the second adjustment conductive terminal M42. When the adjustment switch tube M4 is an N-type transistor, the corresponding scanning signal Gsi is a high-potential pulse signal.

[0109] In other embodiments of the present application, the adjustment switch M4 may also be a P-type LTPS thin film transistor, and the corresponding scan signal Gsi is a low-potential pulse signal.

[0110] The second energy storage element C2 is connected to the buffer node Nh and the ground terminal GND, and is used to maintain the voltage of the buffer node Nh as the data voltage Vdata during a preset period after the self-adjusting switch tube M4 receives the data signal Data. In this embodiment, the second energy storage element C2 is a capacitor.

[0111] Please also read Fig.11 and Fig.12 , Fig.11 for Fig.10 The working timing diagram of the pixel unit P is shown in FIG. Fig.12 for Fig.10 Schematic diagram of the working state of the pixel unit P shown.

[0112] In this embodiment, the data loading stage Td includes a first time period Td1 and a second time period Td2 which are arranged successively in time. In the first time period Td1 of the data loading stage Td, the compensation scanning line Gci outputs the compensation scanning signal Gci to the control switch tube M1, and the scanning line Gi outputs the scanning signal Gsi to the data loading switch tube M3 and the adjustment switch tube M4. The control switch tube M1 is turned on under the control of the compensation scanning signal Gti, the data loading switch tube M3 and the adjustment switch tube M4 under the control of the scanning signal Gsi, and the data signal Data is transmitted to the third node N3 through the data loading switch tube M3 and the unidirectional conductive element D1, and is transmitted to the first node N1 and the buffer node Nh respectively through the third node N3, and the first energy storage element C1 and the second energy storage element C2 are stored respectively, so that the voltages of the first node N1, the third node N3 and the buffer node Nh are all the compensation data voltage Vcp. In this embodiment, the compensation data voltage Vcp is greater than the data voltage Vdata corresponding to the data signal Data.

[0113] In the second time period Td2 of the data loading stage Td, the compensation scan line Gci stops outputting the compensation scan signal Gci to the control switch tube M1, and the scan line Gi continues to output the scan signal Gsi. At this time, the data loading switch tube M3 and the adjustment switch tube M4 maintain the on state, and the control switch tube M1 is turned off, that is, the control switch tube M1 is turned off earlier than the data loading switch tube M3 and the adjustment switch tube M4.

[0114] In this embodiment, Fig.11 As shown, the compensation scanning signal Gci and the compensation signal Gsi are both pulse signals with the same potential, wherein the pulse signal duration of the compensation scanning signal Gci is the duration of the first period T1, and the pulse signal duration of the scanning signal Gsi is the sum of the durations of the first period T1 and the second period T2.

[0115] Since the data loading switch tube M3 and the adjustment switch tube M4 are turned on, the voltage of the buffer node Vh will be continuously charged to the compensation data voltage Vdata.

[0116] During the charging and energy storage process of the first energy storage element C1 as a capacitor, the voltage between its two poles will gradually increase over time. The capacitor voltage charging formula is a formula that describes the change of the voltage between the two poles of the capacitor over time. The formula is as follows:

[0117] Vc=V0(1-e^(-t / RC))(2).

[0118] Wherein, Vc represents the voltage between the two electrodes of the capacitor, V0 represents the voltage value when the capacitor starts to charge, t is the charging time, R is the resistance value of the capacitor, C is the capacitance value of the capacitor, and e is a logarithmic function with a natural constant as the base. R and C are known quantities at the beginning of the design, so the voltage Vc of the third node N3 = Vdata(1-e^(-t / RC)) = VDD-VA, and the voltage VA of the first node N1 = VDD-Vdata(1-e^(-t / RC)). It can be concluded that the voltage VA of the first node N1 is related to the charging time, that is, it is related to the duration of the second time period Td2.

[0119] Therefore, the time of the second period Td2 is determined according to the required data voltage Vdata of the first node N1, the control switch M1 is closed earlier than the data loading switch M3, the charging time of the first energy storage element C1 is Td1, and the charging time of the second energy storage element C2 is Td1+Td2. Therefore, by setting the time of the second period Td2, the data voltage Vdata corresponding to the data signal Data can be accurately obtained.

[0120] During the light-emitting period Te, the scan line Gi also stops outputting the scan signal Gsi, the data loading switch tube M3 and the adjustment switch tube M4 are both turned off, the driving switch tube M2 is turned on under the control of the data voltage Vdata of the first node N1, and the driving power supply VDD cooperates with the data voltage to continuously provide the driving current Ids to the light-emitting element L.

[0121] At the same time, Fig.12 As shown, the buffer node Nh is at the compensation data voltage Vcp under the energy storage maintenance of the second energy storage element C2, the voltage Va of the first node N1 is the data voltage Vdata, and the adjustment switch tube M4 provides a leakage current corresponding to the compensation data voltage Vcp to the third node N3 as the compensation current Icp, and the compensation current Icp will flow from the first node N1 to the third node N3 with the leakage current Icp of the driving switch tube M2. leak The voltage Va of the first node N1 does not change, that is, the leakage current I in the driving unit 200 is adjusted by adjusting the switch tube M4. leak The offset compensation is performed to maintain the voltage Va of the first node N1 accurately at the data voltage Vdata, thereby stabilizing the gate-source voltage of the driving switch tube M2 in the driving unit 200, ensuring that the output driving current Ids is also relatively stable, so that the light-emitting element L can accurately emit light to display an image according to the brightness of the data voltage Vdata corresponding to the data signal Data.

[0122] Since the compensation data voltage Vcp is a voltage adjusted in real time according to the driving switch tube M2, it is not a fixed value, that is, the compensation data voltage Vcp is related to the aging degree, gate-source voltage, and source-drain voltage of the driving switch tube M2 device itself. At the same time, the magnitude of the leakage current of the driving switch tube M2 is also related to the aging degree, gate-source voltage, and source-drain voltage of the driving switch tube M2 device itself. Then, when the compensation data voltage Vcp provided by the driving switch tube M2 can effectively adjust the leakage current of the switch tube M4, the leakage current I of the driving switch tube M2 can be dynamically compensated. leak The size of the first node N1 is ensured to be accurately maintained at the data voltage Vdata.

[0123] At the same time, since the voltage Vc of the third node N3 is greater than the voltage VA of the first node N1, that is, the potential of the third node N3 is higher than the voltage of the first node N1, the leakage current I leak Flows to the third node N3, thereby accurately maintaining the voltage VA of the first node N1 at the data voltage Vdata, ensuring that the driving current Ids output to the light-emitting element L is also relatively stable, so that the pixel unit P accurately performs image display and ensures that the display effect of the display panel 20 is better.

[0124] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A display panel, comprising a display area, wherein the display area comprises a plurality of pixel units arranged in an array, wherein the pixel units are used to perform image display according to data signals, wherein: The pixel unit includes a driving unit and an adjusting unit, wherein the adjusting unit is connected to a scan line and a data line, and is used to receive an image signal from the data line under the control of a scan signal output by the scan line during a data loading period, and transmit the image signal to the driving unit, wherein the driving unit is connected to the scan line and a first power supply terminal, and is used to receive the image signal from the adjusting unit under the control of the scan signal during the data loading period, and during a light-emitting period, the image signal cooperates with the first power supply to output a driving current to a light-emitting element, so as to drive the light-emitting element to emit light corresponding to the image signal to display an image, and during the light-emitting period, the leakage current transmission from the adjusting unit to the data line is blocked.

2. The display panel according to claim 1, characterized in that: The adjustment unit is further used for providing a compensation current to the driving unit during the light emitting period, and the compensation current has the same magnitude as the leakage current transmitted from the driving unit to the adjustment unit.

3. The display panel according to claim 1 or 2, characterized in that: The driving unit includes a control switch tube, a driving switch tube and a first energy storage element. The driving switch tube is connected to the control switch tube through a first node, connected to the first power supply end through a second node, and is also connected to the light-emitting element through a driving node. The first energy storage element is connected to the first node and the second node. The control switch tube is connected to the scan line, the first node and the third node. The control switch tube is used to receive the image signal from the adjustment unit under the control of the scan signal during the data loading period. The image signal is directly stored in the first energy storage element as a data signal. The first energy storage element controls the voltage of the first node to be a data voltage corresponding to the data signal. The data voltage cooperates with the first power supply to output the driving current.

4. The display panel according to claim 3, wherein: The adjustment unit includes at least one unidirectional conductive element, which is between the data line and the third node. The unidirectional conductive element is used to control the data line to provide the image signal for transmission to the third node, while blocking the leakage current transmission from the adjustment unit to the data line.

5. The display panel according to claim 4, wherein: The adjustment circuit also includes a data loading switch tube, an adjustment switch tube, a second energy storage element and a third energy storage element; The data loading switch tube is connected to the data line, the unidirectional conductive element and the scan line, and is used to be turned on under the control of the scan signal during the data loading period, so as to receive the data signal from the data line and load the data voltage corresponding to the data signal to the third node through the unidirectional conductive element; The adjustment switch tube is connected to the scan line, the third node and the buffer node, and is used to be turned on when the scan signal is received during the data loading period, so as to transmit the data voltage received by the third node to the buffer node and the control switch tube; The energy storage element is connected to the buffer node, and is used to store the data voltage and maintain the voltage of the buffer node as the data voltage when the data voltage is loaded on the buffer node; The third energy storage element is connected between the buffer node and the first node, and is used to control the voltage of the buffer node to be the same as that of the first node, and to control the voltage of the buffer node and the first node to be greater than the voltage of the third node.

6. The display panel according to claim 1 or 2, characterized in that: The driving unit includes a control switch tube, a driving switch tube and a first energy storage element. The driving switch tube is connected to the control switch tube through a first node, connected to the first power supply end through a second node, and connected to the light-emitting element through a driving node. The first energy storage element is connected to the first node and the second node. The control switch tube is connected to a compensation scan line, the first node and a third node. The compensation scan line is used to output a compensation scan signal in a first time period of the data writing period. The control switch tube is used to receive a compensation data signal as the image signal from the adjustment unit under the control of the compensation scan signal in the first time period, and convert the compensation data signal into a data signal and store it in the first energy storage element, and control the voltage of the first node to be a data voltage corresponding to the data signal. The data voltage is used to cooperate with the driving power supply to provide the driving current corresponding to the data signal.

7. The display panel according to claim 6, wherein: The adjustment unit includes at least one unidirectional conductive element, which is between the data line and the third node. The unidirectional conductive element is used to control the data line to provide the image signal for transmission to the third node, while blocking the leakage current transmission from the adjustment unit to the data line.

8. The display panel according to claim 7, wherein: The adjustment circuit also includes a data loading switch tube, an adjustment switch tube and a second energy storage element; The data loading switch tube is connected to the data line, the unidirectional conductive element and the scan line, and is used to be turned on under the control of the scan signal in the first period and the second period of the data loading period, so as to load the compensation data voltage corresponding to the compensation data signal received from the data line to the third node through the unidirectional conductive element, and the first period and the second period are sequentially arranged and continuous in time; The adjustment switch tube is connected to the scan line, the third node and the buffer node, and is used to be turned on when receiving the scan signal in the first period and the second period, so as to transmit the compensation data voltage received by the third node to the buffer node and the control switch tube. In the first period, the compensation data voltage is converted into a data voltage through the control switch tube and the first energy storage element and loaded on the first node; The second energy storage element is connected to the buffer node, and is used for storing the data voltage and maintaining the voltage of the buffer node as the compensation data voltage corresponding to the compensation data signal when the data voltage is loaded on the buffer node.

9. The display panel according to claim 7, wherein: The compensation data voltage corresponding to the compensation data signal is greater than the data voltage; The compensation scanning signal and the scanning signal are pulse signals with the same potential, wherein the duration of the pulse signal of the compensation scanning signal is the duration of the first period, and the duration of the pulse signal of the scanning signal is the sum of the durations of the first period and the second period; The compensation data signal corresponds to a change in the threshold voltage of the driving switch tube. During the light-emitting period, the compensation current provided by the adjustment switch tube according to the compensation data voltage corresponds to the leakage current transmitted by the driving switch tube.

10. A display device, characterized in that: It comprises a power supply module and a display panel as described in any one of claims 1 to 9, wherein the power supply module is used to provide driving power for the display panel to display images.

Images