Display panel and electronic equipment

Abstract

The invention relates to a display panel and electronic equipment, the display panel comprises a light emitting element, a driving circuit and a pixel circuit, the driving circuit comprises a control branch, and the control branch is used for generating a first control signal; the pixel circuit is electrically connected with the control branch circuit and the light-emitting element, and comprises a first branch circuit which is used for receiving a first control signal; when the pixel circuit detects the first control signal, the first branch circuit resets the light-emitting element at least once in the preset frame according to the first control signal. The first control signal is generated through the control branch circuit of the driving circuit, and the first branch circuit of the pixel circuit resets the light-emitting element for at least one time in the preset frame according to the first control signal, so that the charge accumulated at the anode of the light-emitting element is less, and the turn-on voltage of the light-emitting element is not easy to reach; the problem of transverse leakage current between adjacent pixels is solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of display devices, and in particular to a display panel and an electronic device. Background Art

[0002] With the development of display technology, display devices in electronic devices are becoming more and more important, especially in the field of smartphones. As one of the important components of display devices, with the increase in the proportion of organic laser display and organic light-emitting semiconductor (OLED) panels in the market of various electronic devices, consumers' requirements for display panels are also getting higher and higher. Among them, high resolution, high contrast and high color gamut are the most urgent needs of customers.

[0003] However, in the development process of high-resolution screens, due to the small spacing between sub-pixels of high-resolution screens, the charge of a lit sub-pixel will leak to the adjacent sub-pixel through the common layer. Over time, the adjacent pixels will also emit light, resulting in a decrease in color gamut and contrast. One of the problems encountered by developers is the crosstalk between different pixels, which in turn leads to a decrease in color gamut and contrast. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a display panel and an electronic device.

[0005] According to a first aspect of an embodiment of the present disclosure, a display panel is provided, comprising: a light-emitting element; a driving circuit, the driving circuit comprising a control branch, the control branch being used to generate a first control signal; a pixel circuit, electrically connected to the control branch and the light-emitting element, respectively, the pixel circuit comprising a first branch, the first branch being used to receive the first control signal; wherein, when the pixel circuit detects the first control signal, the first branch resets the light-emitting element at least once within a preset frame according to the first control signal.

[0006] In some possible implementations, the control branch is provided with a first switch transistor, and a control terminal of the first switch transistor is connected to a reset control signal.

[0007] In some possible implementations, within the preset frame, the frequency of the reset control signal is the same as the display frequency of the display panel.

[0008] In some possible implementations, the first branch is provided with a second switch transistor, one end of the second switch transistor is connected to the light emitting element, the other end of the second switch transistor is connected to a reference signal, and a control end of the second switch transistor is connected to the first control signal.

[0009] In some possible embodiments, the pixel circuit also includes a second branch, the second branch includes a third switch transistor and a fourth switch transistor connected in series, one end of the fourth switch transistor is connected to the light-emitting element, one end of the third switch transistor is connected to a high-level input end, and the control ends of the third switch transistor and the fourth switch transistor are connected to a light-emitting control signal.

[0010] In some possible embodiments, within a preset frame, the frequency of the light-emitting control signal is the same as the frequency of the first control signal, and the frequency of the first control signal is N times the display frequency of the display panel, so that the light-emitting element is reset N times within the preset frame, N≥1.

[0011] In some possible implementations, the control branch is further used to generate a second control signal, and the pixel circuit includes a compensation branch, and the compensation branch is used to receive the second control signal.

[0012] In some possible implementations, within the preset frame, the frequency of the second control signal is the same as the display frequency of the display panel.

[0013] In some possible implementations, the second control signal is triggered in the first phase of the preset frame.

[0014] In some possible embodiments, the compensation branch includes: a fifth switching transistor and a sixth switching transistor, one end of the fifth switching transistor is connected to the sixth switching transistor, the other end of the fifth switching transistor is connected to a reference signal, one end of the sixth switching transistor is connected to the fifth switching transistor, the other end of the sixth switching transistor is connected to the light-emitting element, and the control ends of the fifth switching transistor and the sixth switching transistor are both connected to the second control signal.

[0015] In some possible implementations, the display panel is provided with a display area and a frame area arranged around the display area, the pixel circuit is arranged in the display area, and the driving circuit is arranged in the frame area.

[0016] In some possible embodiments, the display panel includes a first switching transistor, a second switching transistor, a third switching transistor, a fourth switching transistor, a fifth switching transistor and a sixth switching transistor, the first switching transistor is an NMOS transistor, and the second switching transistor, the third switching transistor, the fourth switching transistor, the fifth switching transistor and the sixth switching transistor are all PMOS transistors.

[0017] According to a second aspect of the embodiments of the present disclosure, there is provided an electronic device, comprising: a display panel as described in any one of the implementations of the first aspect above.

[0018] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: the present disclosure provides a display panel, the driving circuit includes a control branch, the control branch is used to generate a first control signal, the pixel circuit is electrically connected to the control branch and the light-emitting element respectively, the pixel circuit includes a first branch, the first branch is used to receive the first control signal, when the pixel circuit detects the first control signal, the first branch resets the light-emitting element at least once within a preset frame according to the first control signal. The present disclosure generates the first control signal through the control branch of the driving circuit, and the first branch of the pixel circuit resets the light-emitting element at least once within a preset frame according to the first control signal, so that the anode of the light-emitting element accumulates less charge, and it is not easy to reach the light-on voltage of the light-emitting element, so as to solve the problem of lateral leakage current between adjacent pixels.

[0019] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0021] Figure 1 This is a circuit diagram of a pixel circuit driven by the same control signal in the prior art.

[0022] Figure 2 Timing diagram of driving pixel circuit in the prior art.

[0023] Figure 3 It is a schematic diagram of the path of lateral leakage current between adjacent pixels in the prior art.

[0024] Figure 4 is a circuit diagram of a pixel circuit in a display panel according to an exemplary embodiment.

[0025] Figure 5 is a timing diagram of driving a pixel circuit in a display panel according to an exemplary embodiment.

[0026] Figure 6 is a circuit diagram of a driving circuit in a display panel according to an exemplary embodiment.

[0027] Figure 7 is a timing diagram of controlling a driving circuit in a display panel according to an exemplary embodiment. DETAILED DESCRIPTION

[0028] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0029] Figure 1 This is a circuit diagram of a pixel circuit driven by the same control signal in the prior art. Figure 2 The timing diagram of driving pixel circuit in the prior art. Figure 1 As shown, in the 7T1C circuit of the prior art in which the same control signal drives the pixel circuit, the switch transistors T2, T3, T4, and T7 are all generated by a group of GOA (Gate On Array) drive circuits, so the same refresh frequency is maintained. Figure 2 As shown, in low grayscale display, the light control signal EM often adopts PWM mode, that is, pulse width modulation. The circuit signal control mode (Pulse Width Modulation) is a very effective mode for controlling analog circuits using the digital output of a microprocessor. For example, in a 120Hz low grayscale display, the frequency of the light control signal EM will be switched to 480Hz or 1960Hz, so within one frame, the waveform of the light control signal EM will be switched to 4 pulses or 16 pulses. However, since the frequency of the switching transistor T3 and the switching transistor T4 must be 120Hz, the frequency of the switching transistor T7 is also 120Hz.

[0030] Figure 3 It is a schematic diagram of the path of lateral leakage current between adjacent pixels in the prior art. Assume that the G (Green) screen is lit in a high-resolution screen. As the spacing between the R (Red) pixel and the G (Green) pixel becomes smaller, the leakage current Ileak between adjacent pixels will become larger. Since there is no reset process at the anode point A of the light-emitting diode during a frame display process, the anode potential of the R pixel will continue to accumulate over time. When it exceeds the lighting voltage of the R pixel, the R pixel will be lit, resulting in a decrease in the color gamut. The lateral leakage current is serious in the high-resolution screen, the low grayscale color gamut is poor, and the contrast is reduced.

[0031] In order to solve the problem of lateral leakage, the conventional solution in the related technology is to improve the organic electroluminescent material system and reduce the mobility between the common layers, but the side effect is that it will reduce the efficiency of the organic electroluminescent material. In addition, the development time of the material system is generally long and cannot be introduced into the project in a short period of time. Therefore, improving the organic electroluminescent material system has a long development cycle and will reduce the efficiency of the organic electroluminescent material, resulting in increased power consumption.

[0032] In order to solve the above technical problems, the present disclosure provides a display panel and an electronic device.

[0033] According to a first aspect of an embodiment of the present disclosure, a display panel is provided, comprising: a light-emitting element; a driving circuit, the driving circuit comprising a control branch, the control branch being used to generate a first control signal; a pixel circuit, electrically connected to the control branch and the light-emitting element, respectively, the pixel circuit comprising a first branch, the first branch being used to receive the first control signal; when the pixel circuit detects the first control signal, the first branch resets the light-emitting element at least once within a preset frame according to the first control signal.

[0034] The light-emitting element may be an organic light-emitting diode (OLED), also known as an organic electroluminescence display or an organic electroluminescence display (OLED).

[0035] The first control signal may be a reset signal.

[0036] The driving circuit may be a 9T2C circuit or other circuits, and the present disclosure does not make any specific limitation on this.

[0037] The pixel circuit may be a 7T1C circuit or other circuits, and the present disclosure does not make any specific limitation on this.

[0038] The preset frame may be one frame. When the pixel circuit detects the first control signal, the first branch only needs to reset the light emitting element at least once within one frame according to the first control signal.

[0039] The present invention generates a first control signal through a control branch of a driving circuit. The first branch of a pixel circuit resets a light-emitting element at least once within a preset frame according to the first control signal, so that less charge is accumulated at the anode of the light-emitting element and the start-up voltage of the light-emitting element is not easily reached, thereby solving the problem of lateral leakage current between adjacent pixels.

[0040] According to a second aspect of the embodiments of the present disclosure, there is provided an electronic device, comprising: a display panel as in any one of the implementations of the first aspect above.

[0041] The present invention generates a first control signal through a control branch of a driving circuit in a display panel. The first branch of a pixel circuit resets a light-emitting element at least once within a preset frame according to the first control signal, so that less charge is accumulated at the anode of the light-emitting element, and it is not easy to reach the start-up voltage of the light-emitting element, so as to solve the problem of lateral leakage current between adjacent pixels, and further solve the problem of light crosstalk between different pixels in electronic devices, which leads to a decrease in color gamut and contrast.

[0042] Figure 4 is a circuit diagram of a pixel circuit in a display panel according to an exemplary embodiment. Figure 5 is a timing diagram of driving a pixel circuit in a display panel according to an exemplary embodiment. Figure 6 is a circuit diagram of a driving circuit in a display panel according to an exemplary embodiment. Figure 7 is a timing diagram of controlling a driving circuit in a display panel according to an exemplary embodiment.

[0043] like Figure 4-7 As shown, according to a first aspect of an embodiment of the present disclosure, a display panel is provided, and the display panel includes: a light emitting element 10, a driving circuit 20 and a pixel circuit 30.

[0044] The driving circuit 20 includes a control branch 21, which is used to generate a first control signal SP*; the pixel circuit 30 is electrically connected to the control branch 21 and the light-emitting element 10, respectively, and the pixel circuit 30 includes a first branch 31, which is used to receive the first control signal SP*; when the pixel circuit 30 detects the first control signal SP*, the first branch 31 resets the light-emitting element 10 at least once within a preset frame according to the first control signal SP*.

[0045] The light emitting element 10 may be an organic light emitting diode (OLED), also known as an organic electroluminescence display or an organic electroluminescence display (OLED).

[0046] The first control signal SP* may be a reset signal.

[0047] The driving circuit 20 may be a 9T2C circuit or other circuits, which is not specifically limited in the present disclosure.

[0048] One end of the control branch 21 is connected to the signal output node of the driving circuit 20, and the other end of the control branch 21 is connected to the element circuit 30, which is used to generate a first control signal SP*, and the period of the first control signal SP* is consistent with the period of the light-emitting control signal EM of the light-emitting element 10.

[0049] The pixel circuit 30 may be a 7T1C circuit or other circuits, which is not specifically limited in the present disclosure.

[0050] One end of the first branch 31 is electrically connected to the light emitting element 10 , and the other end of the first branch 31 is connected to the reference voltage Vref. The first branch 31 resets the light emitting element 10 at least once within a preset frame according to the first control signal SP*.

[0051] The preset frame may be one frame. When the pixel circuit 30 detects the first control signal SP*, the first branch 31 resets the light emitting element 10 at least once in one frame according to the first control signal SP*.

[0052] like Figure 5 As shown, when a monochrome picture (such as G) is displayed at a low grayscale, the display frequency of the display panel can be 120 Hz, and the frequencies of the light-emitting control signal EM and the first control signal SP* of the light-emitting element 10 are both 120*N Hz (N≥1). Within one frame, there are N pulses of the light-emitting control signal EM and the first control signal SP* of the light-emitting element 10, so the anode of the light-emitting element 10 will be reset N times within one frame. For the non-luminous R pixels and B pixels, although there is a leakage path from the G pixels, due to the N reset actions of the anode point, the anode of the light-emitting element 10 accumulates less charge, and it is not easy to reach the light-on voltage of the light-emitting element 10. Therefore, the problem of stealing light caused by the lateral leakage current between adjacent pixels can be solved.

[0053] The present invention generates a first control signal SP* through the control branch 21 of the driving circuit 20. The first branch 31 of the pixel circuit 30 resets the light-emitting element 10 at least once within a preset frame according to the first control signal SP*, so that the anode of the light-emitting element 10 accumulates less charge and it is not easy to reach the start-up voltage of the light-emitting element 10, so as to solve the problem of lateral leakage current between adjacent pixels.

[0054] In some possible implementations, such as Figure 6 As shown, the control branch 21 is provided with a first switch transistor T9, and the control end of the first switch transistor T9 is connected to the reset control signal CTRL.

[0055] It can be understood that the frequency of the reset control signal CTRL is the same as the display frequency of the display panel. For example, the frequency of the reset control signal CTRL and the display frequency of the display panel can both be 120 Hz, 30 Hz, 60 Hz, or other frequencies. The embodiments of the present disclosure do not specifically limit this.

[0056] The first switch transistor T9 can be NMOS, specifically, IGZO indium gallium zinc oxide (IndiumGallium Zinc Oxide), and the reset control signal CTRL can provide two signals, one signal is a first signal, which makes the first switch transistor T9 in an on state, and the other signal is a second signal, which makes the first switch transistor T9 in an off state.

[0057] Exemplarily, the first signal of the reset control signal CTRL is a high level, which may be 0V, and the second signal of the reset control signal CTRL is a low level, which may be VGL1. To ensure that the low level at the signal output node B of the drive circuit 20 can be fully output, the low level VGL1 of the reset control signal CTRL needs to be at least one threshold voltage Vth lower than the low level VGL at the signal output node B of the drive circuit 20. For example, the low level VGL1 of the reset control signal CTRL may be -10V.

[0058] Exemplarily, the first signal of the reset control signal CTRL is a high level, which may be 0V, and the second signal of the reset control signal CTRL is a low level, which may be VGL1. To ensure that the low level at the signal output node B of the drive circuit 20 can be fully output, the low level VGL1 of the reset control signal CTRL needs to be at least one threshold voltage Vth lower than the low level VGL at the signal output node B of the drive circuit 20. For example, the low level VGL1 of the reset control signal CTRL may be -10V, the high level at the signal output node B of the drive circuit 20 may be 7V, and the low level at the signal output node B of the drive circuit 20 may be -7V.

[0059] In some possible implementations, such as Figure 5 As shown, within a preset frame, the frequency of the reset control signal CTRL is the same as the display frequency of the display panel.

[0060] The preset frame may be one frame, and the frequency of the reset control signal CTRL and the display frequency of the display panel may both be 120 Hz.

[0061] like Figure 4-5 As shown, when a monochrome image (for example, G) is displayed at a low grayscale, the frequencies of the light-emitting control signal EM and the first control signal SP* of the light-emitting element 10 can both be 120*N Hz (N≥1), the display frequency of the display panel can be 120 Hz, and the frequency of the reset control signal CTRL is the same as the display frequency of the display panel, that is, the frequency of the reset control signal CTRL is also 120 Hz.

[0062] In one frame, the light control signal EM and the first control signal SP* of the light emitting element 10 have N pulses, so the anode of the light emitting element 10 will be reset N times in one frame. For the non-luminous R pixels and B pixels, although there is a leakage path from the G pixels, since there are N reset actions at the anode point, the charge accumulated at the anode of the light emitting element 10 is small, and it is not easy to reach the start-up voltage of the light emitting element 10. Therefore, the problem of stealing light caused by lateral leakage current between adjacent pixels can be solved.

[0063] In some possible implementations, such as Figure 4 As shown, the first branch 31 is provided with a second switch transistor T7, one end of the second switch transistor T7 is connected to the light emitting element 10, the other end of the second switch transistor T7 is connected to the reference signal Vref, and the control end of the second switch transistor T7 is connected to the first control signal SP*.

[0064] The second switch transistor T7 may be a PMOS, and the first control signal SP* may provide two signals, one signal being a third signal to turn on the second switch transistor T7, and the other signal being a fourth signal to turn off the second switch transistor T7.

[0065] Exemplarily, the fourth signal of the first control signal SP* is at a high level, and the third signal of the first control signal SP* is at a low level.

[0066] like Figure 5 As shown, the dotted box represents the reset phase timing within a frame. When the pixel circuit 30 detects the first control signal SP*, the first branch 31 is in a conductive state according to the third signal of the first control signal SP*, and the second switch transistor T7 is in a conductive state. The anode voltage of the light-emitting element 10 is reset to a reference level by the reference signal Vref, and the anode voltage of the light-emitting element 10 is reset from a high level to a low level, so that the light-emitting element 10 is reset at least once within a preset frame, so that the anode of the light-emitting element 10 accumulates less charge and is not easy to reach the light-on voltage of the light-emitting element 10. Therefore, the light-stealing problem caused by the lateral leakage current between adjacent pixels can be solved.

[0067] In some possible implementations, such as Figure 4 As shown, the pixel circuit 30 also includes a second branch 32, the second branch 32 includes a third switch transistor T5 and a fourth switch transistor T6 connected in series, one end of the fourth switch transistor T6 is connected to the light-emitting element 10, one end of the third switch transistor T5 is connected to the high-level input terminal VDD, and the control ends of the third switch transistor T5 and the fourth switch transistor T6 are connected to the light-emitting control signal EM.

[0068] Among them, the third switch transistor T5 can be a PMOS, the fourth switch transistor T6 can be a PMOS, and the light-emitting control signal EM can provide two signals, one signal is the fifth signal, which makes the third switch transistor T5 and the fourth switch transistor T6 in the on state, and the other signal is the sixth signal, which makes the third switch transistor T5 and the fourth switch transistor T6 in the off state.

[0069] Exemplarily, the sixth signal of the light emitting control signal EM is at a high level, and the fifth signal of the light emitting control signal EM is at a low level.

[0070] like Figure 5 As shown, when in a non-reset stage, that is, in a light-emitting stage, the light-emitting control signal EM is the fifth signal, so that the third switch transistor T5 and the fourth switch transistor T6 are in a conducting state. The first control signal SP* is the fourth signal, and the second switch transistor T7 is in a cut-off state. At this time, the light-emitting element 10 is in a light-emitting stage; the dotted box represents the reset stage timing in a frame. When the pixel circuit 30 detects the first control signal SP*, the first branch 31 is in a conducting state according to the third signal of the first control signal SP*, and the anode voltage of the light-emitting element 10 is reset to a reference level by the reference signal Vref, and the anode voltage of the light-emitting element 10 is reset from a high level to a low level, so that the light-emitting element 10 is reset at least once in a preset frame, so that the anode of the light-emitting element 10 accumulates less charge, and it is not easy to reach the start-up voltage of the light-emitting element 10, so that the light-stealing problem caused by the lateral leakage current between adjacent pixels can be solved.

[0071] In some possible embodiments, within a preset frame, the frequency of the light emitting control signal EM is the same as the frequency of the first control signal Sp*, and the frequency of the first control signal Sp* is N times the display frequency of the display panel, so that the light emitting element 10 is reset N times within the preset frame, N≥1.

[0072] The display frequency of the display panel may be 120 Hz, and the frequency of the light emitting control signal EM and the frequency of the first control signal Sp* are both 120*N Hz, where N≥1.

[0073] Exemplarily, when N=1, the frequency of the light-emitting control signal EM and the frequency of the first control signal Sp* are both 120 Hz. When the pixel circuit 30 detects the first control signal SP*, the first branch 31 is in an on state according to the third signal of the first control signal SP*, and the second switch transistor T7 is in an on state. The anode voltage of the light-emitting element 10 is reset to a reference level by the reference signal Vref, and the anode voltage of the light-emitting element 10 is reset from a high level to a low level, so that the light-emitting element 10 is reset once within a preset frame, so that the anode of the light-emitting element 10 accumulates less charge, and it is not easy to reach the start-up voltage of the light-emitting element 10. Therefore, the problem of stealing light caused by lateral leakage current between adjacent pixels can be solved.

[0074] Exemplarily, when N=2, the frequency of the light-emitting control signal EM and the frequency of the first control signal Sp* are both 240 Hz. When the pixel circuit 30 detects the first control signal SP*, the first branch 31 is in an on state according to the third signal of the first control signal SP*, and the second switch transistor T7 is in an on state. The anode voltage of the light-emitting element 10 is reset to a reference level by the reference signal Vref, and the anode voltage of the light-emitting element 10 is reset from a high level to a low level, so that the light-emitting element 10 is reset twice within a preset frame, so that the anode of the light-emitting element 10 accumulates less charge, and it is not easy to reach the start-up voltage of the light-emitting element 10. Therefore, the problem of stealing light caused by lateral leakage current between adjacent pixels can be solved.

[0075] Exemplarily, when N=3, the frequency of the light-emitting control signal EM and the frequency of the first control signal Sp* are both 360 Hz. When the pixel circuit 30 detects the first control signal SP*, the first branch 31 is in an on state according to the third signal of the first control signal SP*, and the second switch transistor T7 is in an on state. The anode voltage of the light-emitting element 10 is reset to a reference level by the reference signal Vref, and the anode voltage of the light-emitting element 10 is reset from a high level to a low level, so that the light-emitting element 10 is reset three times within a preset frame, so that the anode of the light-emitting element 10 accumulates less charge, and it is not easy to reach the start-up voltage of the light-emitting element 10. Therefore, the problem of stealing light caused by lateral leakage current between adjacent pixels can be solved.

[0076] Exemplarily, when N=4, the frequency of the light-emitting control signal EM and the frequency of the first control signal Sp* are both 480 Hz. When the pixel circuit 30 detects the first control signal SP*, the first branch 31 is in an on state according to the third signal of the first control signal SP*, and the second switch transistor T7 is in an on state. The anode voltage of the light-emitting element 10 is reset to a reference level by the reference signal Vref, and the anode voltage of the light-emitting element 10 is reset from a high level to a low level, so that the light-emitting element 10 is reset four times within a preset frame, so that the anode of the light-emitting element 10 accumulates less charge, and it is not easy to reach the start-up voltage of the light-emitting element 10. Therefore, the problem of stealing light caused by lateral leakage current between adjacent pixels can be solved.

[0077] In some possible implementations, such as Figure 4-6 As shown, the control branch 21 is further used to generate a second control signal Sp, and the pixel circuit 30 includes a compensation branch 33, which is used to receive the second control signal Sp.

[0078] The frequency of the second control signal Sp is consistent with the display frequency of the display panel. The frequency of the second control signal Sp and the display frequency of the display panel can both be 30 Hz, 60 Hz, or 120 Hz, which is not specifically limited in the embodiments of the present disclosure.

[0079] The compensation branch 33 changes the gate-source voltage of the switch transistor in the pixel circuit 30 by charging until the gate-source voltage is related to Vth, where Vth is the threshold voltage of the drive switch transistor in the pixel circuit 30.

[0080] like Figure 7 As shown, the frequency of the STV signal is the same as the frequency of the first control signal Sp* and the light-emitting control signal EM of the light-emitting element 10, and both can be 120*MHz, M≥1, for example, 360Hz; the frequency of the reset control signal CTRL is the same as the display frequency of the display panel, that is, both can be 120Hz, and its duty cycle is 1 / M, that is, the time of low-level opening is 1 / (120*M). The high level of the CK / XCK signal is 7V, and the low level is -7V. The high level of the reset control signal CTRL is 0V, and the low level is VGL1. In order to prevent the low level of the signal output node B of the driving circuit 20 from being unable to be fully output, the low level VGL of the signal output node B of the driving circuit 20 is at least one threshold voltage Vth lower. For example, the low level VGL1 of the reset control signal CTRL can be -10V.

[0081] In one frame, the STV signal has M pulses, and one frame time is divided into M equal parts. In stage a, the reset control signal CTRL is at a low level, for example -10V, and the high and low levels (7V, -7V) of the signal output node B of the drive circuit 20 can be output through the first switch transistor T9; in stages b and c, the reset control signal CTRL is at a high level, for example 0V, and the high level 7V of the signal output node B of the drive circuit 20 can be output, but the low level -7V of the signal output node B of the drive circuit 20 cannot be output through the first switch transistor T9. Therefore, in stages b and c within a frame, the second control signal Sp maintains a high level, and finally the second control signal Sp has only one pulse within a frame.

[0082] Since the first control signal Sp* is directly outputted from the signal output node B of the driving circuit 20 , the frequency of the first control signal Sp* is 120*MHz, and M≥1, that is, the first control signal Sp* may have M pulses in one frame.

[0083] In the embodiment of the present disclosure, the same group of control branches 21 can simultaneously generate signals of two frequencies, namely, two groups of signals of the second control signal Sp and the first control signal Sp*, without causing an increase in the frame of the electronic device.

[0084] In some possible implementations, within a preset frame, the frequency of the second control signal Sp is the same as the display frequency of the display panel.

[0085] The frequency of the second control signal Sp is consistent with the display frequency of the display panel. The frequency of the second control signal Sp and the display frequency of the display panel can both be 30 Hz, 60 Hz, or 120 Hz, which is not specifically limited in the embodiments of the present disclosure.

[0086] In some possible implementations, such as Figure 7 As shown, the second control signal Sp is triggered in the first phase of the preset frame, ie, phase a.

[0087] In one frame, the STV signal has M pulses, and one frame time is divided into M equal parts. In stage a, the reset control signal CTRL is at a low level, for example -10V, and the high and low levels (7V, -7V) of the signal output node B of the drive circuit 20 can be output through the first switch transistor T9; in stages b and c, the reset control signal CTRL is at a high level, for example 0V, and the high level 7V of the signal output node B of the drive circuit 20 can be output, but the low level -7V of the signal output node B of the drive circuit 20 cannot be output through the first switch transistor T9. Therefore, in stages b and c within a frame, the second control signal Sp maintains a high level, and finally the second control signal Sp has only one pulse within a frame.

[0088] In some possible implementations, such as Figure 4 As shown, the compensation branch includes: a fifth switch transistor T3 and a sixth switch transistor T4, one end of the fifth switch transistor T3 is connected to the sixth switch transistor T4, the other end of the fifth switch transistor T3 is connected to the reference signal, one end of the sixth switch transistor T4 is connected to the fifth switch transistor T3, the other end of the sixth switch transistor T4 is connected to the light emitting element 10, and the control ends of the fifth switch transistor T3 and the sixth switch transistor T4 are both connected to the second control signal Sp.

[0089] Among them, the fifth switch transistor T3 and the sixth switch transistor T4 can both be PMOS, and the second control signal Sp can provide two signals, one signal is the seventh signal, so that the fifth switch transistor T3 and the sixth switch transistor T4 are in the on state, and the other signal is the eighth signal, so that the fifth switch transistor T3 and the sixth switch transistor T4 are in the off state.

[0090] Exemplarily, the eighth signal of the second control signal Sp is at a high level, and the seventh signal of the second control signal Sp is at a low level.

[0091] In the embodiment of the present disclosure, the fifth switch transistor T3 and the sixth switch transistor T4 share a set of second control signals Sp, wherein the control waveform of the sixth switch transistor T4 is one CLK cycle earlier than the control waveform of the fifth switch transistor T3.

[0092] In some possible implementations, the display panel is provided with a display area and a frame area arranged around the display area, the pixel circuit 30 is arranged in the display area, and the driving circuit 20 is arranged in the frame area.

[0093] It should be noted that the display area is an effective display area, and the frame area is a non-display area.

[0094] In the embodiment of the present disclosure, a first control signal SP* is generated by a driving circuit 20, and the pixel circuit 30 resets the light-emitting element 10 at least once within a preset frame according to the first control signal SP*, so that the charge accumulated at the anode of the light-emitting element 10 is less and it is not easy to reach the start-up voltage of the light-emitting element 10, so as to solve the problem of lateral leakage current between adjacent pixels.

[0095] In some possible implementations, such as Figure 4 and Figure 6As shown, the display panel includes a first switch transistor T9, a second switch transistor T7, a third switch transistor T5, a fourth switch transistor T6, a fifth switch transistor T3 and a sixth switch transistor T4, the first switch transistor T9 is an NMOS transistor, and the second switch transistor T7, the third switch transistor T5, the fourth switch transistor T6, the fifth switch transistor T3 and the sixth switch transistor T4 are all PMOS transistors.

[0096] It can be understood that the control end of the NMOS transistor is the gate of the switching transistor, one end is the source of the switching transistor, and the other end is the drain of the switching transistor. A high level is applied to the control end of the switching transistor to turn on the switching transistor.

[0097] The control end of the PMOS transistor is the gate of the first switch transistor T9, one end is the source of the first switch transistor T9, and the other end is the drain of the first switch transistor T9. A low level is applied to the control end of the first switch transistor T9 to turn on the first switch transistor T9.

[0098] Based on the same inventive concept, according to a second aspect of the present disclosure, an electronic device is provided, and the electronic device includes: a display panel as in any one of the embodiments of the first aspect.

[0099] Among them, the electronic device can be called terminal equipment, user equipment (UE), mobile station (MS), mobile terminal (MT), etc., which is a device that provides voice and / or data connectivity to users. The electronic device can be: a smart phone (Mobile Phone), a pocket computer (Pocket Personal Computer, PPC), a handheld computer, a personal digital assistant (Personal Digital Assistant, PDA), a laptop, a tablet computer, a wearable device, or a vehicle-mounted device, etc.

[0100] The present disclosure generates a first control signal SP* through the control branch 21 of the driving circuit 20 in the display panel. The first branch 31 of the pixel circuit 30 resets the light-emitting element 10 at least once within a preset frame according to the first control signal SP*, so that the anode of the light-emitting element 10 accumulates less charge and it is not easy to reach the start-up voltage of the light-emitting element 10, so as to solve the problem of lateral leakage current between adjacent pixels, and further solve the problem of light crosstalk between different pixels in electronic devices, which leads to a decrease in color gamut and contrast.

[0101] It is to be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

[0102] It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0103] It will be further understood that the terms “center”, “longitudinal”, “lateral”, “front”, “back”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0104] It can be further understood that, unless otherwise specified, “connection” includes a direct connection without other components between the two, and also includes an indirect connection with other components between the two.

[0105] It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0106] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following scope of rights.

[0107] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. A display panel, characterized in that: The display panel comprises: Light emitting element; A driving circuit, the driving circuit comprising a control branch, the control branch being used to generate a first control signal; a pixel circuit, electrically connected to the control branch and the light-emitting element, respectively, the pixel circuit comprising a first branch, the first branch being used to receive the first control signal; Wherein, when the pixel circuit detects the first control signal, the first branch resets the light-emitting element at least once within a preset frame according to the first control signal.

2. The display panel according to claim 1, characterized in that: The control branch is provided with a first switch transistor, and a control terminal of the first switch transistor is connected to a reset control signal.

3. The display panel according to claim 2, characterized in that: In the preset frame, the frequency of the reset control signal is the same as the display frequency of the display panel.

4. The display panel according to claim 1, characterized in that: The first branch is provided with a second switch transistor, one end of the second switch transistor is connected to the light emitting element, the other end of the second switch transistor is connected to a reference signal, and the control end of the second switch transistor is connected to the first control signal.

5. The display panel according to claim 1, characterized in that: The pixel circuit also includes a second branch, which includes a third switch transistor and a fourth switch transistor connected in series, one end of the fourth switch transistor is connected to the light-emitting element, one end of the third switch transistor is connected to a high-level input end, and the control ends of the third switch transistor and the fourth switch transistor are connected to a light-emitting control signal.

6. The display panel according to claim 5, characterized in that: In a preset frame, the frequency of the light emitting control signal is the same as the frequency of the first control signal, and the frequency of the first control signal is N times the display frequency of the display panel, so that the light emitting element is reset N times in the preset frame, N≥1.

7. The display panel according to claim 1, characterized in that: The control branch is also used to generate a second control signal, The pixel circuit includes a compensation branch, and the compensation branch is used to receive a second control signal.

8. The display panel according to claim 7, characterized in that: In the preset frame, the frequency of the second control signal is the same as the display frequency of the display panel.

9. The display panel according to claim 7, characterized in that: The second control signal is triggered in the first phase of the preset frame.

10. The display panel according to claim 7, characterized in that: The compensation branch includes: a fifth switch transistor and a sixth switch transistor, one end of the fifth switch transistor is connected to the sixth switch transistor, the other end of the fifth switch transistor is connected to the reference signal, one end of the sixth switch transistor is connected to the fifth switch transistor, the other end of the sixth switch transistor is connected to the light-emitting element, and the control ends of the fifth switch transistor and the sixth switch transistor are both connected to the second control signal.

11. The display panel according to claim 1, characterized in that: The display panel is provided with a display area and a frame area arranged around the display area, the pixel circuit is arranged in the display area, and the driving circuit is arranged in the frame area.

12. The display panel according to claim 1, characterized in that: The display panel includes a first switch transistor, a second switch transistor, a third switch transistor, a fourth switch transistor, a fifth switch transistor and a sixth switch transistor, the first switch transistor is an NMOS transistor, and the second switch transistor, the third switch transistor, the fourth switch transistor, the fifth switch transistor and the sixth switch transistor are all PMOS transistors.

13. An electronic device, characterized in that: include: A display panel as claimed in any one of claims 1 to 12.

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