Display panel and display control method

Abstract

The invention discloses a display panel and a display control method, and the display panel comprises a display pixel array which comprises a plurality of display pixels, a pixel circuit corresponding to each display pixel comprises a first charging path, the first charging path is provided with at least one switch, and the number of the at least one switch is smaller than or equal to 2; the data driving line is connected with the first end of the first charging path; and the driving controller is used for providing charging voltage for the charging path through the data driving line, so that the display pixels are charged.

Description

Technical Field

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

[0002] In recent years, with the development of display technology, the application of OLED display panels has become more and more common, and users have higher and higher performance requirements for OLED display panels. Among them, ultra-high refresh rate (≥240Hz) has become the core competitiveness of high-end display devices. Therefore, how to improve the refresh rate of OLED display panels has become a research hotspot in this field. Summary of the invention

[0003] In view of the above problems, the present application provides a display panel and a display control method to achieve the purpose of increasing the refresh frequency of the OLED display panel. The specific solution is as follows:

[0004] A display panel, comprising:

[0005] A display pixel array includes a plurality of display pixels, wherein a pixel circuit corresponding to each display pixel includes a first charging path, wherein the first charging path has at least one switch and the number of the at least one switch is less than or equal to 2;

[0006] a data driving line connected to the first end of the first charging path;

[0007] A driving controller provides a charging voltage to the charging path through the data driving line, so that the display pixel is charged.

[0008] Optionally, the pixel circuit corresponding to each display pixel includes a driving switch, and the driving controller provides a charging voltage to the charging path through the data driving line, so as to pull up the voltage of the control end of the driving switch to a first target voltage through the charging path, thereby realizing charging of the display pixel;

[0009] The first charging path includes: a first switch and a first capacitor, wherein the first end of the first switch is connected to the data driving line, the second end of the first switch is connected to the first plate of the first capacitor, and the second plate of the first capacitor is connected to the control end of the driving switch. When the first switch is turned on, the voltage signal output by the data driving line charges the first plate of the first capacitor via the first switch to increase the voltage of the second plate of the first capacitor, so that the voltage of the control end of the driving switch is increased to the first target voltage.

[0010] Optionally, the pixel circuit corresponding to each display pixel also includes a second charging path, and the second charging path is connected in parallel with the first charging path; the pixel circuit corresponding to each display pixel includes a driving switch, and the driving controller provides a charging voltage to the charging path through the data driving line, so as to raise the voltage of the control end of the driving switch to a first target voltage through the first charging path and the second charging path, thereby realizing charging of the display pixel.

[0011] Optionally, the number of switches included in the first charging path is smaller than the number of switches included in the second charging path, and the charging end time of the first charging path is earlier than the charging end time of the second charging path.

[0012] Optionally, the first charging path has only one switch, and the second charging path has three switches.

[0013] Optionally, the first charging path includes: a first switch, a first end of the first switch is connected to the data driving line, a second end of the first switch is connected to the control end of the driving switch, and when the first switch is turned on, a voltage signal output by the data driving line is transmitted to the control end of the driving switch via the first switch to increase the voltage of the control end of the driving switch;

[0014] The second charging path includes: a second switch, a third switch and the driving switch, wherein a first end of the second switch is connected to the data driving line, a second end of the second switch is connected to the first end of the driving switch, a first end of the third switch is connected to the second end of the driving switch, and a second end of the third switch is connected to the control end of the driving switch. When the second switch, the third switch and the driving switch are all turned on, a voltage signal output by the data driving line is sequentially transmitted to the control end of the driving switch via the second switch, the driving switch and the third switch to pull up the voltage of the control end of the driving switch.

[0015] Optionally, the first charging path has two switches, and the second charging path has three switches.

[0016] Optionally, the first charging path includes:

[0017] a second switch and a fourth switch, wherein a first end of the second switch is connected to the data drive line, a second end of the second switch is connected to a first end of the fourth switch, and a second end of the fourth switch is connected to a control end of the drive switch, and when the second switch and the fourth switch are turned on, a voltage signal output by the data drive line is sequentially transmitted to the control end of the drive switch through the second switch and the fourth switch, thereby raising the voltage of the control end of the drive switch;

[0018] The second charging path includes:

[0019] a second switch, a third switch and the driving switch, wherein a first end of the second switch is connected to the data driving line, a second end of the second switch is connected to the first end of the driving switch, a first end of the third switch is connected to the second end of the driving switch, and a second end of the third switch is connected to the control end of the driving switch; when the second switch, the third switch and the driving switch are all turned on, a voltage signal output by the data driving line is sequentially transmitted to the control end of the driving switch via the second switch, the driving switch and the third switch to pull up the voltage of the control end of the driving switch.

[0020] A display control method, comprising:

[0021] In the pixel charging stage, the data drive line is controlled to provide a charging voltage for a first charging path in a pixel circuit corresponding to each display pixel in the display panel to charge the display pixel. The first charging path has at least one switch and the number of the at least one switch is less than or equal to 2.

[0022] Optionally, also include:

[0023] In the pixel charging stage, the data drive line is controlled to provide a charging voltage for the second charging path in the pixel circuit corresponding to each display pixel in the display panel to charge the display pixel, wherein the speed at which the first charging path charges the display pixel is greater than the speed at which the second charging path charges the display pixel, and the charging end time of the first charging path is earlier than the charging end time of the second charging path. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and the originals and elements are not necessarily drawn to scale.

[0025] Figure 1-Figure 3 It is a schematic diagram of the structure of three pixel circuits in the existing display panel;

[0026] Figure 4 A top view of a display panel provided by an embodiment of the present application;

[0027] Figure 5 A schematic diagram of the structure of a display panel provided by an embodiment of the present application;

[0028] Figure 6A schematic diagram of the structure of a display panel provided by another embodiment of the present application;

[0029] Figure 7 for Figure 6 A schematic diagram of a charging path of the corresponding display panel in the first stage of the pixel charging stage;

[0030] Figure 8 for Figure 6 A schematic diagram of a charging path of the corresponding display panel in the second stage of the pixel charging stage;

[0031] Fig. 9 A schematic diagram of the structure of a display panel provided by another embodiment of the present application;

[0032] Fig.10 for Fig. 9 A schematic diagram of a charging path of the corresponding display panel in the first stage of the pixel charging stage;

[0033] Fig.11 for Fig. 9 A schematic diagram of a charging path of the corresponding display panel in the second stage of the pixel charging stage;

[0034] Fig.12 A flowchart of a display control method provided by one embodiment of the present application. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the embodiments in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0036] It is obvious to those skilled in the art that various modifications and changes can be made in this application without departing from the spirit or scope of this application. Therefore, this application is intended to cover modifications and changes of this application that fall within the scope of the corresponding claims (technical solutions claimed for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of this application can be combined with each other without contradiction.

[0037] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] As described in the background technology section, how to increase the refresh rate of OLED display panels has become a research hotspot in the technical field.

[0039] It should be noted that the refresh frequency of the display panel, also known as the refresh rate, refers to the number of times the display panel refreshes the display screen per second, usually in Hertz (Hz). In specific applications, the higher the refresh rate of the display panel, the smoother the display screen of the display panel will be, the less obvious the flicker and smear of the display screen will be, and the better the user's visual experience will be.

[0040] Specifically, the refresh time of each frame of the display panel is 1 / f, where f is the refresh frequency of the display panel. Since the display panel is refreshed row by row during display, taking the display panel including M rows of display pixels as an example, the refresh time of a row of display pixels is 1 / (f*M). Therefore, in order to increase the refresh rate of the display panel, it is necessary to shorten the refresh time of each row of display pixels in the display panel. Taking a display panel with a resolution of 1220*2712 (i.e., the display panel includes 1220 columns of display pixels and 2712 rows of display pixels) as an example, if the refresh rate of the display panel is to reach 144Hz, the refresh time of a row of display pixels in the display panel must be 1 / (144*2712)=2.56 microseconds; if the refresh rate of the display panel is to reach 240 Hz, the refresh time of a row of display pixels in the display panel must be 1 / (240*2712)=1.5 microseconds.

[0041] In practical applications, each display pixel of the display panel is provided with a corresponding pixel circuit, and the display state of each display pixel is determined by its corresponding pixel circuit, such as Figure 1-Figure 3 As shown, Figure 1-Figure 3 The schematic diagram of the structure of three pixel circuits in the existing display panel is shown, in which, when the light-emitting control transistors T5 and T6 are turned on, each display pixel starts to display, and its driving current (i.e., the current flowing through the light-emitting element D) is the current output by the drain of the driving transistor T1 (referred to as the drain current). The drain current Id of the driving transistor T1 is ∝(Vgs - |Vth|)²), in which Vth represents the threshold voltage of the driving transistor T1, |Vth| represents the absolute value of the threshold voltage of the driving transistor T1, and Vgs represents the gate-source voltage of the driving transistor T1. Figure 1-Figure 3 The gate-source voltage Vgs of the driving transistor in the corresponding pixel circuit is V(N2)-V(N1), V(N2)=V(ELVDD), V(N2) is the voltage of the N2 node, and V(N1) is the voltage of the N1 node.

[0042] Since different display pixels in the same row of the display panel are scanned simultaneously, and different driving transistors may have different threshold voltages Vth due to differences in manufacturing processes, and for the same driving transistor, as its working time increases or the working temperature is different, its threshold voltage Vth may also shift. Since V (ELVDD) is a fixed value, if the threshold voltage Vth shifts, even if the same gate voltage V (N1) is input, the actual driving current of the display pixel will change, resulting in inconsistent OLED light brightness.

[0043] Therefore, in order to improve the display uniformity of the display panel during operation of the display panel, before T5 and T6 are turned on at the same time, the gate voltage V(N1) of the driving transistor T1 needs to be adjusted to be equal to V(Data)-|Vth|, so that when V(Data) is fixed during operation of the display panel, the drain current Id of the driving transistor is a fixed value. Before T5 and T6 are turned on at the same time, the time for adjusting the gate voltage V(N1) of the driving transistor T1 to be equal to V(Data)-|Vth| will affect the refresh time of a row of display pixels, thereby affecting the refresh frequency of the display panel.

[0044] like Figure 1-Figure 3 As shown by the dashed arrow, Figure 1-Figure 3 The dashed arrow in the middle shows the charging path where the gate voltage V(N1) of the driving transistor T1 is adjusted to be equal to V(Data)-|Vth|. Figure 1-Figure 3 It can be seen that in Figure 1-Figure 3 In the pixel circuit shown, the charging path for adjusting the gate voltage V(N1) of the driving transistor T1 to be equal to V(Data)-|Vth| needs to pass through the three transistors T2, T1 and T3 in sequence, resulting in a longer time for adjusting the gate voltage V(N1) of the driving transistor T1 to be equal to V(Data)-|Vth| (charging time of the driving transistor T1).

[0045] In view of this, an embodiment of the present application provides a display panel, such as Figure 4 and Figure 5 As shown, the display panel includes:

[0046] A display pixel array, the display pixel array comprising a plurality of display pixels 10, wherein a pixel circuit 11 corresponding to each display pixel 10 comprises a first charging path A1, and the first charging path A1 has at least one switch and the number of the at least one switch is less than or equal to 2, that is, the number of the at least one switch is not greater than 2;

[0047] a data driving line 20, wherein the data driving line 20 is connected to a first end of the first charging path A1;

[0048] The driving controller 30 provides a charging voltage for the charging path through the data driving line 20, so that the display pixel is charged. It should be noted that, in this embodiment, the driving controller 30 provides a charging voltage for the charging path through the data driving line 20, so that the display pixel is charged, at least including the driving controller 30 providing a charging voltage for the first charging path through the data driving line 20, so that the display pixel is charged.

[0049] Continue as Figure 4 As shown, in one embodiment of the present application, the display pixel array includes a plurality of display pixels 10 arranged in rows and columns. Figure 5 As shown, each display pixel 10 includes a pixel circuit 11 and a light-emitting element 12 electrically connected to the pixel circuit, wherein the light-emitting element 12 emits light under the control of the pixel circuit 11, so that the display pixel realizes display. Optionally, the light-emitting element is an organic light-emitting diode, but this application does not limit this, and it depends on the specific situation.

[0050] In the display panel provided in the embodiment of the present application, the number of switches in the first charging path is less than or equal to 2, that is, the number of switches in the first charging path is not greater than 2, so that the driving controller provides a charging voltage to the charging path through the data driving line, so that when the display pixel is charged, the charging speed of the display pixel can be accelerated, and the charging time of the display pixel can be shortened, which is beneficial to shorten the refresh time of a row of display pixels in the display panel, and further beneficial to shorten the refresh time of a frame of display picture in the display panel, and improve the refresh frequency of the display panel.

[0051] Optionally, in one embodiment of the present application, the switches in the pixel circuit are transistors, but the present application does not limit this and it depends on the specific circumstances. The following describes the display panel provided in the embodiment of the present application by taking the example that the switches in the pixel circuit are all transistors.

[0052] Specifically, in one embodiment of the present application, continue as follows Figure 5 As shown, the pixel circuit 11 corresponding to each display pixel 10 includes a driving switch T10. In this embodiment, the driving controller 30 provides a charging voltage for the charging path through the data driving line 20, so as to pull up the voltage of the control terminal N11 of the driving switch T10 to the first target voltage through the charging path to realize charging of the display pixel 10.

[0053] Optionally, in one embodiment of the present application, continue as Figure 5As shown, the first charging path A1 includes a first switch T11 and a first capacitor Cst1, a first end of the first switch T11 is connected to the data driving line 20, a second end of the first switch T11 is connected to a first plate of the first capacitor Cst1, a second plate of the first capacitor Cst1 is connected to a control terminal N11 of the driving switch T10, when the first switch T11 is turned on, the voltage signal output by the data driving line 20 charges the first plate of the first capacitor Cst1 via the first switch T11, see Figure 5 The red dotted line is used to pull up the voltage of the second plate of the first capacitor Cst1, so that the voltage of the control terminal N11 of the driving switch T10 is pulled up until the voltage of the control terminal N11 of the driving switch T10 is pulled up to the first target voltage, completing the charging of the display pixel. The first target voltage is V(Data)-Vth.

[0054] Continue as Figure 5 As shown, in this embodiment, the pixel circuit further includes: a third switch T13 connecting the control terminal N11 of the driving switch T10 and the second terminal N13 thereof, a fifth switch T15 connecting the first plate of the first capacitor Cst1 and the voltage VI1 input terminal (recorded as the fifth voltage input terminal); a sixth switch T16 connecting the high voltage signal input terminal (recorded as the first voltage input terminal) ELVDD and the first terminal N15 of the driving switch T10; a seventh switch T17 connecting the second terminal N13 of the driving switch T10 and the positive terminal of the light-emitting element 12; an eighth switch T18 connecting the positive terminal of the light-emitting element 12 and the voltage VI2 input terminal (recorded as the fourth voltage input terminal); and a ninth switch T19 connecting the first terminal N15 of the driving switch T10 and the voltage VI3 input terminal (recorded as the third voltage input terminal). Among them, the control end of the third switch T13 inputs the first scan signal Scan1, the control end of the fifth switch T15 inputs the second scan signal Scan2, the control end of the first switch T11 inputs the third scan signal Scan3, the control end of the sixth switch T16 inputs the second light-emitting control signal EM2, the control end of the seventh switch T17 inputs the first light-emitting control signal EM1, and the control ends of the eighth switch T18 and the ninth switch T19 input the first control signal SP*. It should be noted that in other embodiments of the present application, the control ends of the eighth switch T18 and the ninth switch T19 can also be controlled by different control signals, which is not limited in the present application and depends on the specific situation.

[0055] It should be noted that when the display panel is working, the working process of the pixel circuit includes a reset stage, a charging stage and a light emitting control stage; Figure 5The display pixel structure shown in the figure takes the case where each transistor in the pixel circuit is a low-level on transistor as an example to describe the working process of the pixel circuit, wherein VI1 is a high level, such as VI1=V(ELVDD), and VI2 and VI3 are low levels; specifically, in this embodiment,

[0056] In the reset stage, the first control terminal SP* in the pixel circuit inputs a conduction signal, so that the eighth switch T18 and the ninth switch T19 are turned on. At the same time, the first light-emitting control signal EM1 and the first scan signal Scan1 input a conduction signal, so that the seventh switch T17 and the third switch T13 in the pixel circuit are turned on, so that the voltage signal VI2 input to the first terminal of the eighth switch T18 is sequentially input to the second terminal N13 of the driving switch T10 through the eighth switch T18 and the seventh switch T17, and then input to the driving switch T10 through the third switch T13. The control terminal N11 of the switch T10 makes V(N11)=V(N13)=VI2, so as to reset the voltage of the control terminal of the driving switch T10, and makes the voltage signal VI3 inputted at the input terminal of the ninth switch T19 inputted to the first terminal N15 of the driving switch T10 through the ninth switch T19, so as to make V(N15)=VI3, so as to reset the voltage of the first terminal N15 of the driving switch T10, thereby eliminating the influence of the signal inputted during the display process of the previous frame of the display picture on the device characteristics of the driving switch T10; It should be noted that, in the above process, the voltage signal VI2 inputted at the input terminal of the eighth switch T18 will reach the positive terminal N14 of the light emitting element 12 through the eighth switch T18, therefore, the voltage signal VI2 inputted at the input terminal of the eighth switch T18 will also make V(N14)=VI2, so as to reset the positive terminal of the light emitting element 12;

[0057] After the reset is completed, the pixel charging stage is entered. In the first stage of the pixel charging stage, the second scan signal Scan2 in the pixel circuit inputs a turn-on signal, so that the fifth switch T15 is turned on. At this time, the voltage signal VI1 inputted at the input end of the fifth switch T15 is transmitted to the first plate of the first capacitor Cst1 through the fifth switch T15, and the voltage of the first plate of the first capacitor Cst1 is pulled up, so that the voltage V(N12) of the first plate of the first capacitor Cst1 is VI1=V(ELVDD); at the same time, the second light-emitting control signal EM2 inputs a turn-on signal, so that the sixth switch T16 is turned on, and the first scan signal Scan1 continues to input a turn-on signal, so that the third switch T13 in the pixel circuit remains turned on. In the reset stage, the control end of the drive switch T10 is at a low level. Therefore, at this time, the drive switch T10 is also in the conduction state. The sixth switch T16 is in an on state, so that the voltage V (ELVDD) inputted at the first end of the sixth switch T16 is transmitted to the first end N15 of the driving switch T10 through the sixth switch T16, and then transmitted to the second end N13 of the driving switch T10 through the driving switch T10, and then transmitted to the control end N11 of the driving switch T10 through the third switch T13, so as to gradually increase the voltage of the control end N11 of the driving switch T10. In the process that the voltage of the control end N11 of the driving switch T10 gradually increases, the on-current of the driving switch T10 gradually decreases until the on-current of the driving switch T10 is zero. At this time, the voltage of the control end and the second end of the driving switch T10 is maintained stable, and the voltage difference between the control end and the second end of the driving switch T10 is its threshold voltage Vth. Therefore, the voltage of the control end N11 of the driving switch T10 is V (ELVDD) - Vth, that is, the voltage of the second plate of the first capacitor Cst1 is V(ELVDD)-Vth, so that the voltage difference between the first plate and the second plate of the first capacitor Cst1 is V(ELVDD)-(V(ELVDD)-Vth)=Vth;

[0058] In the second stage of the pixel charging stage, the third scanning signal Scan3 inputs a turn-on signal, the first switch T11 is turned on, and the voltage signal V (Data) input at the first end of the first switch T11 is transmitted to the first plate of the first capacitor Cst1 through the first switch T11, so that the voltage of the first plate of the first capacitor Cst1 is V (Data), and then through the coupling between the two plates of the first capacitor Cst1, the voltage of the second plate of the first capacitor Cst1 is adjusted, so that the voltage of the second plate of the first capacitor Cst1 gradually changes from Vth to V (Data) - Vth, that is, the voltage of the control terminal N11 of the driving switch T10 changes from Vth to V (Data) - Vth. In the process of the voltage at the control terminal N11 of the driving switch T10 changing from Vth to V(Data)-Vth, since V(Data) is transmitted from the first end of the first switch T11 to the control terminal N11 of the driving switch T10 through only one transistor of the first switch T11, the process of the voltage at the control terminal N11 of the driving switch T10 changing from Vth to V(Data)-Vth is significantly accelerated, thereby greatly improving the charging speed of the display pixel.

[0059] After the voltage of the control terminal N11 of the driving switch T10 becomes V(Data)-Vth, the light emitting control stage is entered. In the light emitting control stage, the first light emitting control signal EM1 and the second light emitting control signal EM2 input turn-on signals, the sixth switch T16 and the seventh switch T17 are turned on, the voltage V(N15) of the first terminal N15 of the driving switch T10 = V(ELVDD), the voltage V(N11) of the control terminal N11 of the driving switch T10 = Vdata-Vth; the voltage V(N13) of the second terminal N13 of the driving switch T10 = VELVSS +Voled, the current flowing through the light emitting element (i.e., the driving current of the display pixel) Id=K(VELVDD -Vdata+Vth-Vth)2=K(VELVDD -Vdata)2, where K is a fixed coefficient and Voled is the voltage of the positive terminal N4 of the light emitting diode.

[0060] Optionally, in one embodiment of the present application, each switch in the pixel circuit is a low-temperature polysilicon transistor. It should be noted that after entering the light-emitting control stage, the potential of the control terminal N11 of the driving switch T10 is maintained by the storage capacitor Cst2, and the more stable the potential of the control terminal N11 of the driving switch T10, the better the display quality of the display panel. Therefore, in one embodiment of the present application, the first switch T11 and the third switch T13 are dual-gate low-temperature polysilicon transistors to reduce the leakage current of the control terminal N11 of the driving switch T10 and improve the stability of the control terminal N11 of the driving switch T10, but the present application does not limit this and it depends on the specific circumstances.

[0061] As can be seen from the above, in the embodiment of the present application, the first charging path includes a first switch and a first capacitor, and the driving controller provides a charging voltage for the charging path through the data driving line, so as to pull up the voltage of the control end of the driving switch through the charging path, so as to realize charging of the display pixels. The charging speed of the display pixels can be greatly improved, and the charging time can be significantly shortened, and the refresh time of each row of display pixels includes the signal transmission time of the signal line corresponding to the row of pixels and the reset time and charging time of the pixel circuit corresponding to each display pixel. Therefore, in the embodiment of the present application, the driving controller provides a charging voltage for the charging path through the data driving line, so as to pull up the voltage of the control end of the driving switch through the charging path, so as to realize charging of the display pixels, which can shorten the refresh time of a row of display pixels, and is conducive to improving the refresh frequency of the display panel.

[0062] It should be noted that, in the above embodiment, the first charging path requires the first capacitor to have a larger capacitance value and occupies a larger area. Therefore, it is more suitable for display panels that have higher requirements on refresh frequency but not too high requirements on resolution.

[0063] In another embodiment of the present application, Figure 6 and Figure 7 As shown, the pixel circuit corresponding to each display pixel further includes a second charging path A2, and the second charging path A2 is connected in parallel with the first charging path A1. Figure 7 The red dotted line is a schematic diagram of a charging signal in the first charging path A1, and the blue dotted line is a schematic diagram of a charging signal in the second charging path A2. In this embodiment, the pixel circuit corresponding to each display pixel includes a driving switch T10, and the driving controller provides a charging voltage for the charging path through the data driving line, so as to raise the voltage of the control terminal N11 of the driving switch T10 through the first charging path A1 and the second charging path A2, thereby realizing charging of the display pixel.

[0064] Optionally, in one embodiment of the present application, the drive controller provides a charging voltage for the first charging path through the data drive line to provide a second target voltage for the control end of the drive switch through the first charging path, and provides a charging voltage for the second charging path through the data drive line to provide a first target voltage for the control end of the drive switch through the second charging path; in this embodiment, the second target voltage is greater than the first target voltage, and the charging end time of the first charging path is earlier than the charging end time of the second charging path, so as to increase the voltage increase speed of the control end of the drive switch through the second target voltage, and the charging end time of the first charging path is earlier than the charging end time of the second charging path, so that when the first charging path and the second charging path both end charging, the voltage at the control end of the drive switch is related to the first target voltage provided by the second charging path.

[0065] On the basis of the above embodiments, in one embodiment of the present application, the number of switches of the first charging path is less than the number of switches of the second charging path, so that the charging speed of the first charging path is greater than the charging speed of the second charging path. It should be noted that, in this embodiment, the charging end time of the first charging path is earlier than the charging end time of the second charging path, so that when the first charging path and the second charging path both end charging, the voltage of the control end of the driving switch is related to the charging voltage of the second charging path.

[0066] Optionally, in one embodiment of the present application, the first charging path has only one switch, and the second charging path has three switches, so as to increase the charging speed of the first charging path.

[0067] Based on the above embodiment, in one embodiment of the present application, continue as follows Figure 6 As shown, the first charging path A1 includes: a first switch T11, a first end of the first switch T11 is connected to the data driving line 20, a second end of the first switch T11 is connected to the control end N11 of the driving switch T10, when the first switch T11 is turned on, the voltage signal output by the data driving line 20 is directly transmitted to the control end N11 of the driving switch T10 through the first switch T11, and the voltage of the control end N11 of the driving switch T10 is pulled high;

[0068] The second charging path A2 includes: a second switch T12, a third switch T13 and the driving switch T10, wherein a first end of the second switch T12 is connected to the data driving line 20, a second end of the second switch T12 is connected to a first end N15 of the driving switch T10, a first end of the third switch T13 is connected to a second end N13 of the driving switch T10, and a second end of the third switch T13 is connected to a control end N11 of the driving switch T10. When the second switch T12, the third switch T13 and the driving switch T10 are all turned on, a voltage signal output by the data driving line 20 is sequentially transmitted to the control end N11 of the driving switch through the second switch T12, the driving switch T10 and the third switch T13, so that the voltage of the control end N11 of the driving switch T10 is pulled high.

[0069] Continue as Figure 6 As shown, in this embodiment, the pixel circuit further includes: a fifth switch T15 connected to the control terminal N11 of the driving switch T10 and the voltage VI1 input terminal (recorded as the fifth voltage input terminal); a sixth switch T16 connected to the high voltage signal input terminal (recorded as the first voltage input terminal) ELVDD and the first terminal N15 of the driving switch T10; a seventh switch T17 connected to the second terminal N13 of the driving switch T10 and the positive terminal of the light-emitting element 12; and an eighth switch T18 connected to the positive terminal of the light-emitting element 12 and the voltage VI2 input terminal (recorded as the fourth voltage input terminal). Among them, the control terminals of the first switch T11 and the third switch T13 input the sixth scan signal Scan6, the control terminal of the fifth switch T15 inputs the fourth scan signal Scan4, the control terminal of the eighth switch T18 inputs the fifth scan signal Scan5, and the control terminals of the sixth switch T16 and the seventh switch T17 input the third light-emitting control signal EM3.

[0070] Combine the following Figure 6 The display pixel structure shown in the figure takes the case where each transistor in the pixel circuit is a low-level on transistor as an example to describe the working process of the pixel circuit, wherein VI1 and VI2 are low levels; specifically, in this embodiment,

[0071] In the reset stage, the fourth scan signal Scan4 inputs a conduction signal, the fifth switch T15 is turned on, and the voltage signal VI1 input to the first end of the fifth switch T15 is transmitted to the control end N11 of the driving switch T10, so as to reset the control end N11 of the driving switch T10; the fifth scan signal Scan5 inputs a conduction signal, the eighth switch T18 is turned on, and the voltage signal VI2 input to the input end of the eighth switch T18 is transmitted to the positive terminal N14 of the light-emitting element 12 through the eighth switch T18, so as to reset the positive terminal of the light-emitting element 12;

[0072] After the reset is completed, the pixel charging stage begins. In the first stage of the pixel charging stage, Figure 7 As shown, the control terminal SP of the first switch T11 inputs a conduction signal, the first switch T11 is turned on, and the voltage signal V (Data) output by the data driving line 20 is transmitted to the control terminal N11 of the driving switch T10 through the first switch, directly raising the voltage of the control terminal N11 of the driving switch T10, see Figure 7 The red arrow dotted line in FIG. 2 ; at the same time, the sixth scan signal Scan6 input to the control end of the second switch T12 and the third switch T13 inputs a conduction signal, and the second switch T12 and the third switch T13 are turned on. In addition, due to the reset stage, the potential of the control end N11 of the driving switch T10 is low. Therefore, at this time, the driving switch T10 is in the on state, and the voltage signal V (Data) output by the data driving line 20 is transmitted to the control end N11 of the driving switch through the second switch T12, the driving switch T10 and the third switch T13 in sequence, and the voltage of the control end N11 of the driving switch T10 is pulled up, see Figure 7 In this stage, the voltage signal V (Data) output by the data driving line 20 simultaneously pulls up the voltage of the control terminal N11 of the driving switch T10 through the first charging path A1 and the second charging path A2;

[0073] As the voltage of the control terminal N11 of the driving switch T10 increases, the conduction current in the driving switch T10 gradually decreases. Before the voltage of the control terminal N11 of the driving switch T10 increases to V(Data)-Vth, the second stage of pixel charging is entered, and the control terminal SP of the first switch T11 inputs a shutdown signal, the first switch T11 is closed, and the voltage signal V(Data) output by the data driving line 20 is no longer transmitted to the control terminal N11 of the driving switch T10 through the first switch; at this time, the sixth scan signal Scan6 input to the control terminals of the second switch T12 and the third switch T13 continues to input a conduction signal, the second switch T12 and the third switch T13 remain turned on, and the voltage signal V(Data) output by the data driving line 20 continues to be transmitted to the control terminal N11 of the driving switch through the second switch T12, the driving switch T10 and the third switch T13 in sequence, and the voltage of the control terminal N11 of the driving switch T10 is pulled up, see Figure 8In this stage, the voltage signal V (Data) output by the data driving line 20 only pulls up the voltage of the control terminal N11 of the driving switch T10 through the second charging path A2. As the voltage of the control terminal N11 of the driving switch T10 continues to increase, the conduction current in the driving switch T10 continues to decrease until the conduction current in the driving switch T10 drops to zero. The voltage difference between the control terminal N11 and the second terminal N13 of the driving switch T10 is Vth. At this time, the voltage of the control terminal N11 of the driving switch T10 is V (Data) - Vth.

[0074] After the voltage of the control terminal N11 of the driving switch T10 becomes V(Data)-Vth, it enters the light-emitting control stage. In the light-emitting control stage, the third light-emitting control signal EM3 inputs a turn-on signal, the sixth switch T16 and the seventh switch T17 are turned on, the voltage V(N15) of the first terminal N15 of the driving switch T10 = V(ELVDD), the voltage V(N11) of the control terminal N11 of the driving switch T10 = Vdata-Vth; the voltage V(N13) of the second terminal N13 of the driving switch T10 = VELVSS +Voled, the current flowing through the light-emitting element (that is, the driving current of the display pixel) Id=K(VELVDD -Vdata+Vth-Vth)2=K(VELVDD -Vdata)2, where K is a fixed coefficient and Voled is the voltage of the positive terminal N4 of the light-emitting diode.

[0075] It should be noted that, in the above embodiment, the charging time of the first charging path can be obtained in advance through simulation experiments and actual measurement experiments, and this application will not go into details.

[0076] Optionally, in one embodiment of the present application, each switch in the pixel circuit is a low-temperature polysilicon transistor. It should be noted that after entering the light-emitting control stage, the potential of the control terminal N11 of the driving switch T10 is maintained by the storage capacitor CST, and the more stable the potential of the control terminal N11 of the driving switch T10, the better the display quality of the display panel. Therefore, in one embodiment of the present application, the first switch T11 and the third switch T13 are dual-gate low-temperature polysilicon transistors to reduce the leakage current of the control terminal N11 of the driving switch T10 and improve the stability of the control terminal N11 of the driving switch T10, but the present application does not limit this and it depends on the specific circumstances.

[0077] As can be seen from the above, the display panel provided in the embodiment of the present application, in the pixel charging stage, raises the voltage of the control end of the driving switch through the first charging path and the second charging path, wherein the charging speed of the first charging path is faster, so as to increase the raising speed of the voltage of the control end of the driving switch. Moreover, in the present embodiment, the second charging path includes the driving switch, so that by controlling the charging end time of the first charging path to be earlier than the end time of the second charging path, the voltage of the control end of the driving switch can be related to the threshold voltage of the driving switch, thereby increasing the voltage raising speed of the control end of the driving switch on the basis of ensuring the display uniformity of the display panel.

[0078] Compared to Figure 5 The display panel shown, Figure 6 The display panel shown needs to introduce capacitors with large capacitance values, so that it does not need to occupy much space, which is beneficial for improving the refresh rate and resolution of the display panel at the same time.

[0079] In yet another embodiment of the present application, the first charging path has two switches, and the second charging path has three switches.

[0080] Optionally, in one embodiment of the present application, Fig. 9 and Fig.10 As shown, the first charging path A1 includes:

[0081] a second switch T12 and a fourth switch T14, wherein a first end of the second switch T12 is connected to the data driving line 20, a second end of the second switch T12 is connected to a first end of the fourth switch T14, and a second end of the fourth switch T14 is connected to a control end N11 of the driving switch T10; when the second switch T12 and the fourth switch T14 are turned on, a voltage signal output by the data driving line 20 is sequentially transmitted to the control end N11 of the driving switch T10 through the second switch T12 and the fourth switch T14, thereby raising the voltage of the control end N11 of the driving switch T10;

[0082] The second charging path A2 includes: a second switch T12, a third switch T13 and the driving switch T10, wherein a first end of the second switch T12 is connected to the data driving line 20, a second end of the second switch T12 is connected to the first end N15 of the driving switch T10, a first end of the third switch T13 is connected to the second end N13 of the driving switch T10, and a second end of the third switch T13 is connected to the control end N11 of the driving switch T10. When the second switch T12, the third switch T13 and the driving switch T10 are all turned on, the voltage signal output by the data driving line 20 is sequentially transmitted to the control end N11 of the driving switch through the second switch T12, the driving switch T10 and the third switch T13 to pull up the voltage of the control end N11 of the driving switch T10.

[0083] Continue as Fig. 9 As shown, in this embodiment, the pixel circuit further includes: a fifth switch T15 connected to the first end of the fourth switch T14 and the voltage VI1 input end (recorded as the fifth voltage input end); a sixth switch T16 connected to the high voltage signal input end (recorded as the first voltage input end) ELVDD and the first end N15 of the driving switch T10; a seventh switch T17 connected to the second end N13 of the driving switch T10 and the positive end of the light emitting element 12; an eighth switch T18 connected to the positive end of the light emitting element 12 and the voltage VI2 input end (recorded as the fourth voltage input end); and a ninth switch T19 connected to the first end N15 of the driving switch T10 and the voltage VI3 input end (recorded as the third voltage input end). Among them, the control end of the first switch T11 is input with the seventh scan signal Scan7, the control end of the third switch T13 is input with the third control signal SN1, the control end of the fourth switch T14 is input with the fourth control signal SN2, the control end of the fifth switch T15 is input with the eighth scan signal Scan8, the control ends of the sixth switch T16 and the seventh switch T17 are input with the fourth light-emitting control signal EM4, the control end of the eighth switch T18 is input with the sixth light-emitting control signal EM6, and the control end of the ninth switch T19 is input with the fifth light-emitting control signal EM5.

[0084] Combine the following Fig. 9 The display pixel structure shown in the figure takes the case where each transistor in the pixel circuit is a low-level on transistor as an example to describe the working process of the pixel circuit, wherein VI1, VI2 and VI3 are all low levels; specifically, in this embodiment,

[0085] In the first stage of the reset stage, the third control signal SN1 inputs a turn-on signal, the third switch T13 is turned on, the fifth light-emitting control signal EM5 inputs a turn-on signal, the eighth switch T18 is turned on, and the voltage signal VI2 inputted at the first end thereof is transmitted to the positive end of the light-emitting element 12, and the positive end of the light-emitting element 12 is reset. At the same time, the ninth switch T19 is turned on, and the voltage signal VI3 inputted at the first end thereof is transmitted to the first end N15 of the driving switch T10, and the first end N15 of the driving switch T10 is reset.

[0086] In the second stage of the reset phase, the fourth control signal SN2 inputs a turn-on signal, the eighth scan signal inputs a turn-on signal Scan8 inputs a turn-on signal, the fourth switch T14 and the fifth switch T15 are turned on, and the voltage signal VI1 input to the first end of the fifth switch T15 is sequentially transmitted to the control end N11 of the driving switch T10 through the fifth switch T15 and the fourth switch T14, and the control end N11 of the driving switch T10 is reset;

[0087] After the reset is completed, the pixel charging stage is entered. In the first stage of the pixel charging stage, the fourth control signal SN2 continuously inputs a conduction signal, the seventh scan signal Scan7 inputs a conduction signal, the second switch T12 and the fourth switch T14 are turned on, and the voltage signal V (Data) output by the data driving line 20 is sequentially transmitted to the control terminal N11 of the driving switch T10 through the second switch T12 and the fourth switch T14, and the voltage of the control terminal N11 of the driving switch T10 is pulled up. Fig.10 At the same time, the first control signal SN1 input to the control terminal of the third switch T13 inputs a turn-on signal, the second switch T12 and the third switch T13 are turned on, and because the potential of the control terminal N11 of the driving switch T10 is low during the reset phase, the driving switch T10 is in the on state at this time, and the voltage signal V (Data) output by the data driving line 20 is sequentially transmitted to the control terminal N11 of the driving switch through the second switch T12, the driving switch T10 and the third switch T13, and the voltage of the control terminal N11 of the driving switch T10 is pulled up, see Fig.10 In this stage, the voltage signal V (Data) output by the data driving line 20 simultaneously pulls up the voltage of the control terminal N11 of the driving switch T10 through the first charging path A1 and the second charging path A2;

[0088] As the voltage at the control terminal N11 of the driving switch T10 increases, the conduction current in the driving switch T10 gradually decreases. Before the voltage at the control terminal N11 of the driving switch T10 increases to V(Data)-Vth, the second stage of the pixel charging stage is entered, and the fourth control signal SN2 input to the control terminal of the fourth switch T14 is switched to a shutdown signal, the fourth switch T14 is closed, and the voltage signal V(Data) output by the data driving line 20 is no longer transmitted to the control terminal N11 of the driving switch T10 through the fourth switch T14; at this time, the seventh scan signal Scan7 input to the control terminal of the second switch T12 continues to input a conduction signal, and the first control signal SN1 input to the control terminal of the third switch T13 inputs a conduction signal, the second switch T12 and the third switch T13 remain turned on, and the voltage signal V(Data) output by the data driving line 20 continues to be transmitted to the control terminal N11 of the driving switch through the second switch T12, the driving switch T10 and the third switch T13 in sequence, and the voltage of the control terminal N11 of the driving switch T10 is pulled up, see Fig.11 In this stage, the voltage signal V (Data) output by the data driving line 20 only pulls up the voltage of the control terminal N11 of the driving switch T10 through the second charging path A2. As the voltage of the control terminal N11 of the driving switch T10 continues to increase, the conduction current in the driving switch T10 continues to decrease until the conduction current in the driving switch T10 drops to zero. The voltage difference between the control terminal N11 and the second terminal N13 of the driving switch T10 is Vth. At this time, the voltage of the control terminal N11 of the driving switch T10 is V (Data) - Vth.

[0089] After the voltage of the control terminal N11 of the driving switch T10 becomes V(Data)-Vth, the secondary reset stage is entered, the fifth light-emitting control signal EM5 inputs a conduction signal, the eighth switch T18 is turned on, and the voltage signal VI2 inputted at the first terminal thereof is transmitted to the positive terminal of the light-emitting element 12, and the positive terminal of the light-emitting element 12 is reset again. At the same time, the ninth switch T19 is turned on, and the voltage signal VI32 inputted at the first terminal thereof is transmitted to the first terminal N15 of the driving switch T10, and the first terminal N15 of the driving switch T10 is reset again.

[0090] After the secondary reset is completed, the light-emitting control stage is entered. In the light-emitting control stage, the fourth light-emitting control signal EM4 inputs a turn-on signal, the sixth switch T16 and the seventh switch T17 are turned on, the voltage V(N15) of the first terminal N15 of the driving switch T10 is V(ELVDD), and the voltage V(N11) of the control terminal N11 of the driving switch T10 is Vdata-Vth; the voltage V(N13) of the second terminal N13 of the driving switch T10 is VELVSS +Voled, and the current flowing through the light-emitting element (that is, the driving current of the display pixel) Id=K(VELVDD -Vdata+Vth-Vth)2=K(VELVDD -Vdata)2, where K is a fixed coefficient and Voled is the voltage of the positive terminal N4 of the light-emitting diode.

[0091] It should be noted that, in the above embodiment, the charging time of the first charging path can be obtained in advance through simulation experiments and actual measurement experiments, and this application will not go into details.

[0092] It should also be noted that in actual applications, the display panel will not only involve scenarios with high requirements for refresh frequency, such as gaming or video playback, but also scenarios with low requirements for refresh frequency, such as screen saver image playback. In order to reduce the power consumption of the display panel, when the display panel is used in scenarios with low requirements for refresh frequency, the refresh frequency of the display panel can be reduced to reduce the power consumption of the display panel. In the application scenario of low refresh frequency, in one frame of display, the potential of the control terminal N11 of the driving switch T10 needs to be stable for a longer time. Therefore, the display panel requires a lower leakage current at the control terminal of the driving switch T10.

[0093] Optionally, in one embodiment of the present application, the fourth switch T14 and the third switch T13 are metal oxide transistors to further reduce the leakage current of the control terminal N11 of the driving switch T10 and improve the stability of the control terminal N11 of the driving switch T10, but the present application does not limit this and it depends on the specific situation.

[0094] It should be noted that in the light-emitting control stage, charges will accumulate at the sixth switch T16, the seventh switch T17 and the light-emitting element 12. The lower the refresh frequency of the display panel, the more charges will accumulate at the sixth switch T16, the seventh switch T17 and the light-emitting element 12. The more charges need to be cleared when resetting the first end of the driving switch T10 and the positive end of the light-emitting element 12, and the longer the time required.

[0095] Therefore, in the present embodiment, the working process of the display panel also includes a secondary reset stage, so as to clean up the charges accumulated by the sixth switch T16, the seventh switch T17 and the light-emitting element 12 when the previous frame of the display picture is displayed through two reset stages, but the present application is not limited to this. In other embodiments of the present application, the working process of the pixel circuit may also include only one reset stage, and the charges accumulated by the sixth switch T16, the seventh switch T17 and the light-emitting element 12 when the previous frame of the display picture is displayed are cleaned up through the reset time of the reset stage, depending on the specific situation.

[0096] Based on any of the above embodiments, in one embodiment of the present application, the display panel can be a display panel of electronic devices such as a mobile phone, a tablet computer, a wearable device, a vehicle-mounted device, an augmented reality (AR) / virtual reality (VR) device, a laptop computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), etc., and the embodiment of the present application does not impose any restrictions on this.

[0097] Accordingly, the embodiment of the present application also provides a display control method, such as Fig.12 As shown, the method includes:

[0098] In the pixel charging stage, the data drive line is controlled to provide a charging voltage for a first charging path in a pixel circuit corresponding to each display pixel in the display panel to charge the display pixel. The first charging path has at least one switch and the number of the at least one switch is less than or equal to 2.

[0099] It should be noted that, in this embodiment, the display pixel array includes a plurality of display pixels arranged in rows and columns, and each display pixel includes a pixel circuit and a light-emitting element electrically connected to the pixel circuit, wherein the light-emitting element emits light under the control of the pixel circuit so that the display pixel realizes display. Optionally, the light-emitting element is an organic light-emitting diode, but this application does not limit this, depending on the specific circumstances. Among them, the pixel circuit can be the pixel circuit provided in any of the above embodiments, and this application will not repeat it.

[0100] Optionally, in one embodiment of the present application, continue as Fig.12As shown, the method also includes a reset stage before the pixel charging stage. In the reset stage, the method includes: resetting the source of the driving switch and the positive electrode of the light-emitting element in the pixel circuit to eliminate the influence of the signal input during the display process of the previous frame of the display image on the device characteristics of the driving switch.

[0101] Optionally, in one embodiment of the present application, continue as Fig.12 As shown, the method further includes a light-emitting control stage after the pixel charging stage. In the light-emitting control stage, the method includes controlling the conduction of the path where the light-emitting element is located to provide a driving current to the light-emitting element so that the light-emitting element emits light.

[0102] In the display control method provided in the embodiment of the present application, the number of switches in the first charging path is less than or equal to 2, that is, the number of switches in the first charging path is not greater than 2, so that when the data drive line is controlled to provide a charging voltage to the charging path, the charging speed of the display pixel can be accelerated when the display pixel is charged, and the charging time of the display pixel can be shortened, which is beneficial to shorten the refresh time of a row of display pixels in the display panel, and further beneficial to shorten the refresh time of a frame of display picture in the display panel, and improve the refresh frequency of the display panel, so as to be applied to application scenarios requiring high refresh frequency.

[0103] Optionally, in one embodiment of the present application, continue as Figure 5 As shown, the first charging path 1 includes a first switch T11 and a first capacitor Cst1, a first end of the first switch T11 is connected to the data driving line 20, a second end of the first switch T11 is connected to a first plate of the first capacitor Cst1, and a second plate of the first capacitor Cst1 is connected to a control terminal N11 of the driving switch T10. When the first switch T11 is turned on, the voltage signal output by the data driving line 20 charges the first plate of the first capacitor Cst1 via the first switch T11. Figure 5 The red dotted line in the middle is used to pull up the voltage of the second plate of the first capacitor Cst1, so that the voltage of the control terminal N11 of the driving switch T10 is pulled up, until the voltage of the control terminal N11 of the driving switch T10 is pulled up to the first target voltage, completing the charging of the display pixel.

[0104] In this embodiment, the first charging path includes only one switch, which can greatly improve the charging speed of the display pixels, so that the charging time of the display pixels can be significantly shortened, and the refresh time of each row of display pixels includes the signal transmission time of the signal line corresponding to the row of pixels and the reset time and charging time of the pixel circuit corresponding to each display pixel. Therefore, the display control method provided in the embodiment of the present application can shorten the refresh time of a row of display pixels, which is conducive to improving the refresh frequency of the display panel.

[0105] It should be noted that, in the above embodiment, the first charging path requires the first capacitor to have a larger capacitance value and occupies a larger area. Therefore, it is more suitable for display panels that have higher requirements on refresh frequency but not too high requirements on resolution.

[0106] In another embodiment of the present application, the method further includes: in the pixel charging stage, controlling the data drive line to provide a charging voltage for the second charging path in the pixel circuit corresponding to each display pixel in the display panel to charge the display pixel, wherein the charging voltage provided to the display pixel by the first charging path is greater than the charging voltage provided to the display pixel by the second charging path, that is, the speed at which the first charging path charges the display pixel is greater than the speed at which the second charging path charges the display pixel, and the charging end time of the first charging path is earlier than the charging end time of the second charging path. In this embodiment, the method charges the display pixel through the first charging path and the second charging path at the same time, and the charging voltage provided to the display pixel by the first charging path is greater than the charging voltage provided to the display pixel by the second charging path, thereby utilizing the first charging path to accelerate the charging speed of the display pixel.

[0107] Optionally, in one embodiment of the present application, the method includes: in a pixel charging stage, providing a charging voltage to the first charging path through the data driving line, so as to provide a second target voltage to the control end of the driving switch through the first charging path, and providing a charging voltage to the second charging path through the data driving line, so as to provide a first target voltage to the control end of the driving switch through the second charging path; wherein the second target voltage is greater than the first target voltage, and the charging end time of the first charging path is earlier than the charging end time of the second charging path, so as to increase the voltage increase speed of the control end of the driving switch through the second target voltage, and the charging end time of the first charging path is earlier than the charging end time of the second charging path, so that when both the first charging path and the second charging path end charging, the voltage at the control end of the driving switch is related to the first target voltage provided by the second charging path.

[0108] On the basis of the above embodiments, in one embodiment of the present application, the pixel charging stage includes two stages. Optionally, the method includes:

[0109] In the first stage of pixel charging, a charging voltage is provided to the first charging path through the data driving line, so as to provide a second target voltage to the control end of the driving switch through the first charging path, and a charging voltage is provided to the second charging path through the data driving line, so as to provide the first target voltage to the control end of the driving switch through the second charging path, so as to charge the display pixel through the first charging path and the second charging path at the same time, thereby improving the charging speed of the display pixel;

[0110] In the second stage of pixel charging, the first charging path is closed, and a charging voltage is provided to the second charging path only through the data drive line, so as to provide a first target voltage to the control end of the drive switch through the second charging path, so that when both the first charging path and the second charging path finish charging, the voltage at the control end of the drive switch is related to the first target voltage provided by the second charging path.

[0111] It should be noted that, in the above embodiment, the second charging path includes a driving switch, so that in the light emitting control stage, the voltage at the control end of the driving switch is V(Data)-Vth, wherein V(Data) is the voltage signal input to the data driving line, and Vth is the threshold voltage of the driving switch, thereby solving the problem of poor display brightness consistency caused by the threshold voltage offset of the driving switch due to different driving switches or different stages of the same driving switch.

[0112] Optionally, in one embodiment of the present application, the first charging path has only one switch and the second charging path has three switches. In another embodiment of the present application, the first charging path has only two switches and the second charging path has three switches. The present application does not limit this and it depends on the specific circumstances.

[0113] It should be noted that the display control method provided in the embodiment of the present application can be applied not only to application scenarios requiring a high refresh rate, but also to application scenarios requiring a low refresh rate.

[0114] Optionally, in one embodiment of the present application, when applied to an application scenario with a low refresh frequency, the method further includes lowering the refresh frequency of the display panel to reduce power consumption of the display panel.

[0115] Since after entering the light-emitting control stage, the more stable the potential of the control end of the driving switch is, the better the display consistency of the display image of the display panel is, therefore, in one embodiment of the present application, the switches directly connected to the control end of the driving switch in the pixel circuit are all dual-gate low-temperature polysilicon transistors to reduce the leakage current of the control end of the driving switch and improve the stability of the control end of the driving switch; in another embodiment of the present application, the switches directly connected to the control end of the driving switch in the pixel circuit are all metal oxide transistors to further reduce the leakage current of the control end of the driving switch and improve the stability of the control end of the driving switch. The present application does not limit this and it depends on the specific circumstances.

[0116] It should be noted that during the light-emitting control stage, charges will accumulate at the source of the driving switch and the light-emitting element. The lower the refresh frequency of the display panel, the more charges will accumulate at the source of the driving switch and the light-emitting element. The more charges need to be cleared when resetting the source of the driving switch and the positive terminal of the light-emitting element, and the longer the time required.

[0117] Therefore, based on any of the above embodiments, in one embodiment of the present application, the method further includes a secondary reset stage after the pixel charging stage and before the light emitting control stage. In the secondary reset stage, the method includes resetting the source of the driving switch and the positive terminal of the light emitting element to further eliminate the influence of the previous frame display on the current display, but the present application is not limited to this. In other embodiments of the present application, the method can also further eliminate the influence of the previous frame display on the current display by extending the reset time of the reset stage before the pixel charging stage, depending on the specific circumstances.

[0118] In summary, in the display panel and display control method provided in the embodiments of the present application, the number of switches in the first charging path is less than or equal to 2, that is, the number of switches in the first charging path is not greater than 2, so that when the charging voltage is provided to the charging path through the data drive line, the charging speed of the display pixel can be accelerated when the display pixel is charged, and the charging time of the display pixel can be shortened, which is beneficial to shorten the refresh time of a row of display pixels in the display panel, and further beneficial to shorten the refresh time of a frame of display picture in the display panel, and improve the refresh frequency of the display panel.

[0119] In this specification, each embodiment is described in a progressive, parallel, or progressive and parallel manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0120] It should be noted that in the description of the present application, it should be understood that the description of the drawings and embodiments is illustrative rather than restrictive. It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish an entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the article or equipment including a series of elements includes not only those elements, but also includes other elements that are not clearly listed, or also includes elements inherent to such articles or equipment. In the absence of more restrictions, the elements limited by the statement "including one..." do not exclude the existence of other identical elements in the article or equipment including the above-mentioned elements.

[0121] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, comprising: A display pixel array includes a plurality of display pixels, wherein a pixel circuit corresponding to each display pixel includes a first charging path, wherein the first charging path has at least one switch and the number of the at least one switch is less than or equal to 2; a data driving line connected to the first end of the first charging path; A driving controller provides a charging voltage to the charging path through the data driving line, so that the display pixel is charged.

2. The display panel according to claim 1, wherein the pixel circuit corresponding to each display pixel comprises a driving switch, and the driving controller provides a charging voltage to the charging path through the data driving line, so as to pull up the voltage of the control terminal of the driving switch to the first target voltage through the charging path, thereby realizing charging of the display pixel; The first charging path includes: A first switch and a first capacitor, wherein the first end of the first switch is connected to the data drive line, the second end of the first switch is connected to the first plate of the first capacitor, and the second plate of the first capacitor is connected to the control end of the drive switch. When the first switch is turned on, the voltage signal output by the data drive line charges the first plate of the first capacitor through the first switch to increase the voltage of the second plate of the first capacitor, so that the voltage of the control end of the drive switch is increased to a first target voltage.

3. According to the display panel of claim 1, the pixel circuit corresponding to each display pixel also includes a second charging path, and the second charging path is connected in parallel with the first charging path; the pixel circuit corresponding to each display pixel includes a driving switch, and the driving controller provides a charging voltage to the charging path through the data driving line, so as to raise the voltage of the control end of the driving switch to the first target voltage through the first charging path and the second charging path, thereby realizing charging of the display pixel. 4 . The display panel according to claim 3 , wherein the number of switches of the first charging path is smaller than the number of switches of the second charging path, and the charging end time of the first charging path is earlier than the charging end time of the second charging path. 5 . The display panel according to claim 4 , wherein the first charging path has only one switch, and the second charging path has three switches.

6. The display panel according to claim 5, wherein the first charging path comprises: a first switch, wherein a first end of the first switch is connected to the data driving line, a second end of the first switch is connected to a control end of the driving switch, and when the first switch is turned on, a voltage signal output by the data driving line is transmitted to the control end of the driving switch via the first switch to increase the voltage of the control end of the driving switch; The second charging path includes: a second switch, a third switch and the driving switch, wherein a first end of the second switch is connected to the data driving line, a second end of the second switch is connected to the first end of the driving switch, a first end of the third switch is connected to the second end of the driving switch, and a second end of the third switch is connected to the control end of the driving switch. When the second switch, the third switch and the driving switch are all turned on, a voltage signal output by the data driving line is sequentially transmitted to the control end of the driving switch via the second switch, the driving switch and the third switch to pull up the voltage of the control end of the driving switch. 7 . The display panel according to claim 4 , wherein the first charging path has two switches, and the second charging path has three switches.

8. The display panel according to claim 7, wherein the first charging path comprises: a second switch and a fourth switch, wherein a first end of the second switch is connected to the data drive line, a second end of the second switch is connected to a first end of the fourth switch, and a second end of the fourth switch is connected to a control end of the drive switch, and when the second switch and the fourth switch are turned on, a voltage signal output by the data drive line is sequentially transmitted to the control end of the drive switch through the second switch and the fourth switch, thereby raising the voltage of the control end of the drive switch; The second charging path includes: a second switch, a third switch and the driving switch, wherein a first end of the second switch is connected to the data driving line, a second end of the second switch is connected to the first end of the driving switch, a first end of the third switch is connected to the second end of the driving switch, and a second end of the third switch is connected to the control end of the driving switch; when the second switch, the third switch and the driving switch are all turned on, a voltage signal output by the data driving line is sequentially transmitted to the control end of the driving switch via the second switch, the driving switch and the third switch to pull up the voltage of the control end of the driving switch.

9. A display control method, comprising: In the pixel charging stage, the data drive line is controlled to provide a charging voltage for a first charging path in a pixel circuit corresponding to each display pixel in the display panel to charge the display pixel. The first charging path has at least one switch and the number of the at least one switch is less than or equal to 2.

10. The display control method according to claim 9, further comprising: In the pixel charging stage, the data driving line is controlled to provide a charging voltage to the second charging path in the pixel circuit corresponding to each display pixel in the display panel to charge the display pixel, wherein: The speed at which the first charging path charges the display pixel is greater than the speed at which the second charging path charges the display pixel, and the charging end time of the first charging path is earlier than the charging end time of the second charging path.

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