Display method, display panel, and display device

Abstract

The present application discloses a display method, a display panel, and a display device, which relate to the field of display technology, including: based on a voltage compensation circuit, when the sub-pixel area is in a light-emitting state, the diffusely reflected light generated by the sub-pixel area is converted into a photocurrent for storage; when it is detected that there is a voltage compensation demand in the sub-pixel area, the stored photocurrent is output to the pixel driving circuit to perform voltage compensation on the sub-pixel area. In this way, through the voltage compensation circuit, the sub-pixel area is voltage compensated without the need to connect to an external voltage to increase power consumption, thereby achieving picture improvement in the corresponding display area.

Description

Technical Field

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

[0002] In the pursuit of energy conservation and battery life extension, existing display devices often adopt a strategy of reducing the display frequency when in standby mode or when displaying certain special images. This strategy reduces the display frequency to, for example, 15Hz or lower, thereby reducing overall power consumption.

[0003] However, this frequency reduction method can cause gate leakage in the drive transistor, resulting in flickering and insufficient display brightness. To restore display brightness and stabilize the image, the drive voltage in the pixel area is usually increased. However, this approach results in additional power consumption, which contradicts the original intention of designing a low-frequency display state to reduce power consumption. Summary of the Invention

[0004] The main purpose of this application is to provide a display method, a display panel and a display device, aiming to solve the technical problem of how to avoid abnormal display images caused by gate leakage in a low-frequency display state without increasing power consumption.

[0005] To achieve the above objectives, the present application proposes a display method, which is applied to a display panel. The display panel is composed of multiple sub-pixel regions. The sub-pixel regions are driven and controlled by a pixel driving circuit and a voltage compensation circuit. The voltage output terminal of the voltage compensation circuit is connected to the pixel driving circuit, the voltage input terminal of the voltage compensation circuit is connected to the sub-pixel region, and the pixel voltage output terminal of the pixel driving circuit is connected to the sub-pixel region. The display method includes:

[0006] When the sub-pixel region is in a light-emitting state, the diffusely reflected light generated by the sub-pixel region is converted into a photocurrent for storage;

[0007] When it is detected that a voltage compensation requirement exists in the sub-pixel region, the stored photocurrent is output to the pixel driving circuit to perform voltage compensation on the sub-pixel region.

[0008] In one embodiment, when the display panel is a partitioned multi-frequency display panel, the voltage compensation circuit is connected to the first node of the pixel driving circuit. When a voltage compensation requirement is detected in a sub-pixel region, the step of outputting the stored photocurrent to the pixel driving circuit includes:

[0009] Obtaining a target refresh rate of a display area corresponding to the sub-pixel area, and when detecting that the target refresh rate is greater than a preset refresh rate, determining that a voltage compensation requirement exists in the sub-pixel area, and sending a conduction control signal to the voltage compensation circuit;

[0010] The stored photocurrent is transmitted to the first node through the voltage compensation circuit in the on state.

[0011] In one embodiment, when the display panel is a low-frequency display panel, the voltage compensation circuit is connected to the first node of the pixel driving circuit. When a voltage compensation requirement is detected in a sub-pixel region, the step of outputting the stored photocurrent to the pixel driving circuit includes:

[0012] Determine whether the low-frequency display panel is in a low-frequency display state;

[0013] If the low-frequency display panel is in a low-frequency display state, it is determined that there is a voltage compensation requirement in the sub-pixel area, and a conduction control signal is sent to the voltage compensation circuit;

[0014] The stored photocurrent is transmitted to the first node through the voltage compensation circuit in the on state.

[0015] In addition, to achieve the above-mentioned object, the present application also proposes a display panel, which is applied to the display method as described above, wherein the display panel includes a display area composed of multiple sub-pixel areas, and the sub-pixel areas are driven and controlled by a pixel driving circuit and a voltage compensation circuit;

[0016] The pixel driving circuit includes a first node and a pixel voltage output terminal, and the voltage compensation circuit includes a voltage input terminal, a light-sensitive input terminal, an output control terminal and a voltage output terminal;

[0017] The voltage input terminal is connected to the sub-pixel area, the light-sensing input terminal senses the diffusely reflected light of the sub-pixel area, the output control terminal is connected to the control device, the voltage output terminal is connected to the first node, and the pixel voltage output terminal is connected to the sub-pixel area;

[0018] a voltage compensation circuit for receiving a pixel voltage generated in the sub-pixel region through a voltage input terminal when the sub-pixel region is in a light-emitting state, and converting diffusely reflected light sensed through the photosensitive input terminal into a photocurrent for storage based on the pixel voltage;

[0019] The voltage compensation circuit is further configured to enter a conduction state according to a conduction control signal input to the output control terminal, and transmit the stored photocurrent to the first node through the voltage output terminal;

[0020] The pixel driving circuit is used for, in an on state, using the voltage on the first node as a driving voltage to perform voltage compensation on the sub-pixel region via the pixel voltage output terminal.

[0021] In one embodiment, the voltage compensation circuit includes a first control device, a storage capacitor, and a light sensing device;

[0022] The output terminal of the first control device is connected to the first node, the control terminal of the first control device is connected to the control device, and the input terminal of the first control device is connected to the first terminal of the storage capacitor;

[0023] The second end of the storage capacitor is connected to the output end of the light sensing device;

[0024] The first control end of the photosensitive device receives the diffusely reflected light, and the input end of the photosensitive device is connected to the sub-pixel area.

[0025] In one embodiment, the pixel driving circuit includes a driving switching device;

[0026] The input terminal of the driving switch device is connected to the data signal terminal, the control terminal of the driving switch device is connected to the pixel voltage output terminal, and the output terminal of the driving switch device is connected to the sub-pixel area.

[0027] In one embodiment, along the light emitting direction of the display panel, when the driving switch device is arranged at the lower left of the sub-pixel area, the light sensing device is arranged at the upper right of the sub-pixel area;

[0028] The photosensitive device is arranged on the glass substrate;

[0029] Wherein, the first metal layer provided on the glass substrate forms the second control terminal of the light sensing device;

[0030] A first gate insulating layer and a second gate insulating layer are sequentially provided on the first metal layer, and a vertical opening operation is performed on the second gate insulating layer and the first gate insulating layer to form a first opening;

[0031] A photosensitive semiconductor serving as the first control terminal of the photosensitive device is provided in the second gate insulating layer. Two ends of the photosensitive semiconductor are respectively provided with a second metal layer serving as the input terminal of the photosensitive device and a third metal layer serving as the output terminal of the photosensitive device.

[0032] In one embodiment, the third metal layer is disposed above the first opening;

[0033] The first opening is used to transmit the photocurrent generated by the first control terminal connected to the third metal layer to the storage capacitor for storage.

[0034] In one embodiment, the pixel driving circuit further includes a second control device, a third control device, a fourth control device, a fifth control device and a first capacitor;

[0035] The control terminal of the second control device is connected to the pixel voltage output terminal of the previous stage, and the output terminal of the second control device is connected to the control terminal of the third control device;

[0036] The control end of the fourth control device and the control end of the fifth control device are respectively connected to the voltage output end of the next stage pixel;

[0037] The output terminal of the second control device is connected to the input terminal of the fourth control device, and the output terminal of the third control device is connected to the input terminal of the fifth control device;

[0038] The first capacitor is connected between the output terminal of the second control device and the output terminal of the third control device, and one terminal of the first capacitor is connected to the pixel voltage output terminal.

[0039] In addition, to achieve the above-mentioned purpose, the present application also proposes a display device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the display method described above.

[0040] One or more technical solutions proposed in this application have at least the following technical effects:

[0041] A display method implemented on a display panel is proposed. The display panel is composed of multiple sub-pixel areas. The sub-pixel areas are driven and controlled by a pixel driving circuit and a voltage compensation circuit. The voltage output terminal of the voltage compensation circuit is connected to the pixel driving circuit, the voltage input terminal of the voltage compensation circuit is connected to the sub-pixel area, and the pixel voltage output terminal of the pixel driving circuit is connected to the sub-pixel area. The display method includes: when the sub-pixel area is in a light-emitting state, converting diffusely reflected light generated by the sub-pixel area into a photocurrent for storage; when it is detected that the sub-pixel area has a voltage compensation requirement, outputting the stored photocurrent to the pixel driving circuit to perform voltage compensation on the sub-pixel area.

[0042] The present application adds a voltage compensation circuit on the basis of the original pixel driving circuit. The voltage compensation circuit utilizes the excess diffusely reflected light emitted by the sub-pixel area when it is in the luminous state, converts the diffusely reflected light into photocurrent, and there is a voltage compensation demand in the sub-pixel area. That is, due to the gate leakage phenomenon, the voltage transmitted to the sub-pixel area is insufficient to meet the display requirements of the display area corresponding to the sub-pixel area, resulting in an abnormal picture phenomenon of dark state or flickering in the display area. At this time, the photocurrent is transmitted to the pixel driving circuit to improve the conduction ability of the pixel driving circuit and enhance the voltage value transmitted to the sub-pixel area. In this way, the sub-pixel area is voltage compensated without the need to connect to an external voltage, which causes an increase in power consumption, thereby achieving picture improvement in the corresponding display area. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0044] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0045] Figure 1 A schematic diagram of a flow chart provided for an embodiment of a display method of the present application;

[0046] Figure 2 This is a circuit structure diagram when the display panel of this application is a partitioned multi-frequency display panel;

[0047] Figure 3 This is a circuit structure diagram when the display panel of this application is a low-frequency display panel;

[0048] Figure 4 This is a timing diagram of the voltage output terminals of each pixel within one frame time under high and low frequency partitioning;

[0049] Figure 5 A schematic diagram of the component layout of a partitioned multi-frequency display panel;

[0050] Figure 6 A schematic diagram of component layout of a low-frequency display panel;

[0051] Figure 7 A schematic diagram of the structure for preparing a driving switch device;

[0052] Figure 8 Schematic diagram of the preparation structure of the photosensitive device;

[0053] Figure 9 Schematic diagram of the device structure of the hardware operating environment involved in the display method in the embodiment of the present application.

[0054] Description of Figure Numbers:

[0055] Pixel, sub-pixel area;

[0056] 10. Pixel driving circuit; Tb, driving switch device; T2, second control device; T3, third control device; T4, fourth control device; T5, fifth control device; Cb, first capacitor; VDS, voltage terminal; CK, clock signal terminal; VGL, gate low voltage terminal; DATA, data signal terminal; G(n), pixel voltage output terminal; G(n-1), previous level pixel voltage output terminal; G(n+1), next level pixel voltage output terminal; A, first node;

[0057] 20. Voltage compensation circuit; T1, first control device; Ca, storage capacitor; Ta, photosensitive device; La, control terminal of the first control device;

[0058] 101, glass substrate; 102, first gate insulating layer; 103, fifth metal layer; 104, second gate insulating layer; 105, conductive semiconductor; 106, fourth metal layer; 107, sixth metal layer;

[0059] 108 , first metal layer; 109 , photosensitive semiconductor; 110 , second metal layer; 111 , third metal layer; 112 , first opening.

[0060] The purpose, features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0061] It should be understood that the specific embodiments described herein are merely used to explain the technical solutions of the present application and are not intended to limit the present application.

[0062] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0063] The main solution of the embodiment of the present application is: a display method implemented on a display panel is proposed, the display panel is composed of multiple sub-pixel areas, the sub-pixel areas are driven and controlled by a pixel driving circuit and a voltage compensation circuit, the voltage output end of the voltage compensation circuit is connected to the pixel driving circuit, the voltage input end of the voltage compensation circuit is connected to the sub-pixel area, and the pixel voltage output end of the pixel driving circuit is connected to the sub-pixel area. The display method includes: when the sub-pixel area is in a light-emitting state, converting the diffusely reflected light generated by the sub-pixel area into a photocurrent for storage; when it is detected that there is a voltage compensation demand in the sub-pixel area, outputting the stored photocurrent to the pixel driving circuit to perform voltage compensation on the sub-pixel area.

[0064] The existing frequency reduction method can cause gate leakage in the drive transistor, leading to screen flickering and insufficient brightness in areas requiring high-frequency display. To restore brightness and stabilize the display, the drive voltage in these pixel areas is typically increased. However, this approach consumes additional power, defeating the original purpose of designing a low-frequency display state to reduce power consumption.

[0065] The present application provides a solution by adding a voltage compensation circuit on the basis of the original pixel driving circuit. The voltage compensation circuit utilizes the excess diffuse reflected light emitted by the sub-pixel area in the luminous state to convert the diffuse reflected light into photocurrent. There is a voltage compensation demand in the sub-pixel area. That is, due to the gate leakage phenomenon, the voltage transmitted to the sub-pixel area is insufficient to meet the display requirements of the display area corresponding to the sub-pixel area, resulting in an abnormal picture phenomenon of dark state or flickering in the display area. At this time, the photocurrent is transmitted to the pixel driving circuit to improve the conduction ability of the pixel driving circuit and enhance the voltage value transmitted to the sub-pixel area. In this way, the sub-pixel area is voltage compensated without the need to connect to an external voltage, which causes an increase in power consumption, thereby achieving picture improvement in the corresponding display area.

[0066] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, mobile phone, etc., or an electronic device or display device capable of implementing the above functions. The following uses a display device as an example to illustrate this embodiment and the following embodiments.

[0067] Based on this, the embodiment of the present application provides a display method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the display method of this application.

[0068] In this embodiment, the display method includes steps S10 to S20:

[0069] Step S10 , when the sub-pixel region is in a light-emitting state, converting the diffusely reflected light generated by the sub-pixel region into a photocurrent for storage.

[0070] Because the display method that can be implemented in this embodiment is implemented based on the improved display panel of this embodiment, the structure of the improved display panel needs to be described first.

[0071] In this embodiment, a voltage compensation circuit is added to the original pixel driving circuit to compensate the voltage input into the pixel driving circuit. That is, the original sub-pixel area is driven and controlled only by the pixel driving circuit, while the sub-pixel area in this embodiment is driven and controlled by the pixel driving circuit and the newly added voltage compensation circuit.

[0072] Specifically, the voltage input terminal of the voltage compensation circuit is connected to the sub-pixel area, the photosensitive input terminal of the voltage compensation circuit senses the diffusely reflected light in the sub-pixel area, the output control terminal of the voltage compensation circuit is connected to the control device, and the voltage output terminal of the voltage compensation circuit is connected to the first node of the pixel driving circuit.

[0073] Because the pixel voltage output end of the pixel driving circuit is connected to the sub-pixel area, the voltage compensation circuit provided in this embodiment can receive excess diffusely reflected light emitted by the sub-pixel area through its photosensitive input end when the sub-pixel area to which it is connected is in a light-emitting state, thereby forming electron-hole pairs in the photosensitive input end. Since the sub-pixel area will only enter the light-emitting state when there is a voltage, the voltage input end of the voltage compensation circuit at this time will sense the pixel voltage of the sub-pixel area and be connected. The pixel voltage will be transmitted to the photosensitive input end. Under the action of the pixel voltage, the electron-hole pairs in the photosensitive input end will separate under the action of the electric field to form a photocurrent. At this time, the voltage compensation circuit in the closed state will first store the photocurrent.

[0074] That is, the pixel voltage in the sub-pixel area is recycled, and the pixel voltage that has been used to drive the sub-pixel area to emit light is processed and then stored again.

[0075] Step S20 : When it is detected that the sub-pixel region has a voltage compensation requirement, the stored photocurrent is output to the pixel driving circuit to perform voltage compensation on the sub-pixel region.

[0076] When it is detected that the display area corresponding to the sub-pixel area has abnormal display conditions such as too low brightness or display flickering, it is determined that the sub-pixel area at this time has a voltage compensation requirement. At this time, the control device transmits a conduction control signal to the output control end of the voltage compensation circuit, so that the voltage compensation circuit is changed to a conduction state, and the stored photocurrent is transmitted to the pixel driving circuit through the voltage output end. Therefore, the photocurrent transmitted to the pixel driving circuit at this time will improve the conduction ability of the pixel driving circuit, allowing more current to pass through the pixel voltage output end, and perform voltage compensation on the sub-pixel area, thereby improving the display brightness of the sub-pixel area and improving the display flickering phenomenon due to insufficient voltage.

[0077] That is, the pixel voltage that has been used to drive the sub-pixel area to emit light is recycled to compensate the voltage of the sub-pixel area, so as to solve the existing abnormal display phenomenon without increasing additional power consumption and achieve the low power consumption requirement in the low-frequency display state.

[0078] In this embodiment, a voltage compensation circuit is added to the original pixel driving circuit. The voltage compensation circuit utilizes the excess diffusely reflected light emitted by the sub-pixel area when it is in a light-emitting state, converts the diffusely reflected light into photocurrent, and there is a voltage compensation demand in the sub-pixel area. That is, due to the gate leakage phenomenon, the voltage transmitted to the sub-pixel area is insufficient to meet the display demand of the display area corresponding to the sub-pixel area, resulting in an abnormal picture phenomenon of dark state or flickering in the display area. At this time, the photocurrent is transmitted to the pixel driving circuit to improve the conduction ability of the pixel driving circuit and enhance the voltage value transmitted to the sub-pixel area. In this way, the sub-pixel area is voltage compensated without the need to connect to an external voltage, which causes an increase in power consumption, thereby achieving picture improvement in the corresponding display area.

[0079] For ease of explanation, first refer to Figure 2 and Figure 3 , the specific circuit structures of the pixel driving circuit 10 and the voltage compensation circuit 20 for driving and controlling the sub-pixel region Pixel when the display panel is a partitioned multi-frequency display panel or a low-frequency display panel are described. The pixel driving circuit 10 includes a first node A and a pixel voltage output terminal G(n), and the voltage compensation circuit 20 includes a voltage input terminal, a light-sensing input terminal, an output control terminal, and a voltage output terminal.

[0080] according to Figure 2 and Figure 3 As can be seen, the voltage compensation circuit 20 includes a first control device T1, a storage capacitor Ca, and a photosensitive device Ta. The output terminal of the first control device T1 serves as a voltage output terminal and is connected to the first node A. The control terminal La of the first control device T1 serves as an output control terminal and is connected to the control device. The input terminal of the first control device T1 is connected to the first terminal of the storage capacitor Ca. The second terminal of the storage capacitor Ca is connected to the output terminal of the photosensitive device Ta. The first control terminal of the photosensitive device Ta serves as a light-sensing input terminal and receives diffusely reflected light. The input terminal of the photosensitive device Ta serves as a voltage input terminal and is connected to the sub-pixel area Pixel.

[0081] The pixel driving circuit 10 includes a driving switch device Tb. The input terminal of the driving switch device Tb is connected to the data signal terminal DATA; the control terminal of the driving switch device Tb is connected to the pixel voltage output terminal G(n); and the output terminal of the driving switch device Tb serves as the pixel voltage output terminal G(n) and is connected to the sub-pixel area Pixel.

[0082] It should be noted that Figure 2 and Figure 3The pixel driving circuit 10 is further configured to store and reset the driving voltage in the first capacitor Cb according to the conduction states of the control devices included therein at different timings. The circuit includes a second control device T2, the input of which is connected to the voltage terminal VDS. The conduction state of the second control device T2 is controlled by the pixel voltage output terminal G(n-1) of the previous stage. The output of the second control device T2 is respectively connected to the control terminal of the third control device T3 and the input terminal of the fourth control device T4. The input terminal of the third control device T3 is connected to the clock signal terminal CK. The output of the third control device T3 is connected to the input terminal of the fifth control device T5. The control terminals of the fourth control device T4 and the fifth control device T5 are connected to the pixel voltage output terminal G(n+1) of the next stage. The output terminals of the fourth control device T4 and the fifth control device T5 are connected to the gate low voltage terminal VGL. The first capacitor Cb is connected between the output terminal of the second control device T2 and the output terminal of the third control device T3, and one terminal of the first capacitor Cb is connected to the pixel voltage output terminal G(n).

[0083] The difference is that the voltage compensation circuit 20 is connected in different ways under different display panel types.

[0084] ①Reference Figure 2 In the case where the display panel is a partitioned multi-frequency display panel, since the entire display area corresponding to the display panel is divided into multiple display areas, each display area can be driven independently at a different frequency. Therefore, the voltage compensation circuit 20 is connected to the display panel 20 as shown in FIG. Figure 2 As shown in FIG1 , the first node A is located near the pixel voltage output terminal G(n), that is, near the gate of the driving switch device Tb provided in the pixel driving circuit 10. This can avoid cross interference caused by frequency variation. Voltage compensation near the gate can ensure stable driving performance of the driving switch device Tb under various frequencies. The corresponding step S20 specifically includes steps S21 to S22:

[0085] Step S21, obtaining the target refresh rate of the display area corresponding to the sub-pixel area, and when detecting that the target refresh rate is greater than the preset refresh rate, determining that there is a voltage compensation requirement in the sub-pixel area, and sending a conduction control signal to the voltage compensation circuit.

[0086] First, when the display panel is in a low-frequency display state, it is necessary to determine whether the display area corresponding to each sub-pixel area Pixel has a high-frequency display requirement. Specifically: obtain the refresh rate called when the driver chip controls each display area to enter the display drive state, and determine whether each sub-pixel area Pixel is a high-frequency area according to the target refresh rate corresponding to each display area, so as to determine which sub-pixel areas Pixel need voltage compensation in the low-frequency display state. For example, if the refresh rate of the display panel in the low-frequency display state is 60Hz, 60Hz is set as the preset refresh rate. If the driver chip obtains a display area with a target refresh rate greater than 60Hz, the sub-pixel area Pixel corresponding to the display area is determined to be a high-frequency area.

[0087] If it is determined that there is a sub-pixel area Pixel in the high-frequency area, it is considered that the driving voltage input to the sub-pixel area Pixel in the low-frequency display state is insufficient to ensure the normal picture display of the corresponding display area, that is, it is determined that there is a voltage compensation requirement for the sub-pixel area Pixel. At this time, the control device is controlled to transmit a conduction control signal to the control terminal La of the first control device T1 in the voltage compensation circuit 20 that drives the sub-pixel area Pixel, thereby turning on the transmission channel between the storage capacitor Ca and the pixel driving circuit 10.

[0088] Step S22: The stored photocurrent is transmitted to the first node A through the voltage compensation circuit 20 in the on state.

[0089] The photocurrent converted by the voltage compensation circuit 20 is stored in the storage capacitor Ca included therein. Therefore, when the transmission channel between the storage capacitor Ca and the first node A, that is, the channel where the first control device T1 is located, is turned on, the photocurrent on the storage capacitor Ca will be output to the first node A through the turned-on first control device T1. In this way, the driving voltage on the pixel driving circuit 10 is compensated through the first node A, and the voltage value output by the pixel voltage output terminal G(n) to the driving switch device Tb is increased, thereby improving the conduction capability of the driving switch device Tb.

[0090] In addition, if it is determined that any sub-pixel area Pixel is a low-frequency area, it means that the display area corresponding to the sub-pixel area Pixel needs to reduce the display frequency. Therefore, it is not necessary to turn on the first control device T1 at this time, and the photocurrent stored in the storage capacitor Ca is transmitted to the corresponding driving switch device Tb to enhance the pixel voltage on the sub-pixel area Pixel.

[0091] Combined with Figure 4The timing example shown in FIG. 1 is used to illustrate. Assume that the sub-pixel regions Pixel corresponding to the first pixel voltage output terminal G1, the second pixel voltage output terminal G2, and the third pixel voltage output terminal G3 are in the low-frequency region S1 within one frame time, and the sub-pixel regions Pixel corresponding to the fourth pixel voltage output terminal G4 and the fifth pixel voltage output terminal G5 are in the high-frequency region S2 within one frame time.

[0092] Therefore, within this frame time, the voltage compensation circuit 20 connected to the first pixel voltage output terminal G1, the second pixel voltage output terminal G2 and the third pixel voltage output terminal G3 is controlled not to be turned on, that is, the corresponding first control device T1 is controlled to be in a closed state, so that the photocurrent is stored in the storage capacitor Ca, and the driving voltage compensation is not performed on the first pixel voltage output terminal G1, the second pixel voltage output terminal G2 and the third pixel voltage output terminal G3. Therefore, at this time, the first pixel voltage output terminal G1, the second pixel voltage output terminal G2 and the third pixel voltage output terminal G3 will only output a high voltage once within this frame time.

[0093] Because the sub-pixel area Pixel corresponding to the fourth pixel voltage output terminal G4 and the fifth pixel voltage output terminal G5 is the high-frequency area S2 within the frame time, after the fourth pixel voltage output terminal G4 and the fifth pixel voltage output terminal G5 output a high voltage according to the original output, the control device will output a conduction control signal to turn on the first control device T1, and the corresponding storage capacitor Ca outputs a photocurrent to the fourth pixel voltage output terminal G4 and the fifth pixel voltage output terminal G5, so that the fourth pixel voltage output terminal G4 and the fifth pixel voltage output terminal G5 output a high voltage again, so that the pixel voltage output terminal G(n) corresponding to the high-frequency area S2 is controlled to complete two high voltage outputs within one frame time without the need for additional power consumption, thereby achieving a high- and low-frequency partitioned display effect with low power consumption when the display panel is in a low-frequency display state.

[0094] ②Reference Figure 3 In the case where the display panel is a low-frequency display panel, since the entire display area of the display panel operates in a wider frequency range, it is necessary to ensure the stability of the driving voltage for turning on the driving switch device Tb to ensure the display consistency of the entire display area. Figure 3 It can be seen that in the low-frequency display state, Figure 3When the second control device T2 shown in the figure works in the low-frequency display state for a long time, the leakage current of its gate will be aggravated, thereby causing the voltage transmitted to the first node A through the second control device T2 to decrease, causing the driving voltage on the first node A to decrease. The voltage on the first node A is used to drive the driving switch device Tb to turn on. Therefore, when the driving voltage on the first node A decreases, it will cause the driving voltage output to the driving switch device Tb to be unstable, causing the display screen to flicker and other problems. Therefore, the voltage compensation circuit 20 at this time needs to be connected as shown in FIG. Figure 3 On the first node A shown, step S20 specifically includes steps S24 to S26:

[0095] Step S24: determining whether the low-frequency display panel is in a low-frequency display state.

[0096] First, it is necessary to determine whether the current low-frequency display panel is in a low-frequency display state, that is, to determine whether the driving voltage transmitted to the driving switch device Tb connected to each sub-pixel area Pixel is unstable.

[0097] In step S25 , if the low-frequency display panel is in the low-frequency display state, it is determined that the sub-pixel area Pixel has a voltage compensation requirement, and a conduction control signal is sent to the voltage compensation circuit 20 .

[0098] If it is determined that the current low-frequency display panel is in a low-frequency display state, it is considered that the picture display based on the low-frequency display panel at this time has an abnormal display condition of display flickering, and it is necessary to enhance the conduction capability of the driving switch device Tb. At this time, the control device will be controlled to transmit a conduction control signal to the control terminal La of the first control device T1 in the voltage compensation circuit 20, thereby turning on the transmission channel between the storage capacitor Ca and the pixel driving circuit 10.

[0099] Step S26: The stored photocurrent is transmitted to the first node A through the voltage compensation circuit 20 in the on state.

[0100] When the transmission channel between the storage capacitor Ca and the pixel driving circuit 10, that is, the channel where the first control device T1 is located, is turned on, the photocurrent on the storage capacitor Ca will be output to the first node A by the first control device T1 through which the channel is turned on. The photocurrent is then transmitted to the control end of the driving switch device Tb via the pixel voltage output end G(n) through the first node A. By raising the driving voltage on the first node A, the driving voltage drop of the first node A caused by the gate leakage current defect of the second control device T2, and the problem of reduced conduction capability of the driving switch device Tb, can be avoided.

[0101] In this embodiment, the access position of the newly added voltage compensation circuit 20 is dynamically planned according to different display panel types, so as to enhance the driving voltage compensation effect of the photocurrent stored in the voltage compensation circuit 20 on the driving switching device Tb, and effectively solve the display problems existing in different display panel types under low-frequency display state.

[0102] In addition, because the connection position of the voltage compensation circuit 20 is different under different display panel types, the component layout diagrams after the corresponding display panel is connected to the voltage compensation circuit 20 are also different. Figure 5 The display panel is a component layout diagram of a partitioned multi-frequency display panel. Figure 6 This is a component layout diagram for a low-frequency display panel. The component layout diagram corresponds to a specific circuit structure. For ease of distinction, the materials that make up the corresponding devices are patterned here. Figures 5 to 8 In the example, the same pattern means that the same material is used. Figure 5 and Figure 6 113, 114 and 115 are all made of metal.

[0103] As can be seen, because the driving switch device Tb in the pixel driving circuit 10 in the two component layouts shown in this embodiment is located at the lower left of its corresponding sub-pixel area Pixel, the photosensitive device Ta of the voltage compensation circuit 20 can only be located at the other opening of the sub-pixel area Pixel, that is, at the upper right of the sub-pixel area Pixel, to avoid interference between different devices. In actual configuration, the position of the photosensitive device Ta can be dynamically adjusted according to the specific component layout.

[0104] Specifically, because the original manufacturing structure of the driving switch device Tb is as follows Figure 7 As shown. It can be seen that because the original driving switch device Tb is located at the lower left of the sub-pixel area Pixel, the fourth metal layer 106, which forms the output terminal of the driving switch device Tb, is connected to the sub-pixel area Pixel. Specifically, it is disposed on a glass substrate 101 and isolated from the glass substrate 101 by a first gate insulating layer 102. A fifth metal layer 103 disposed on the first gate insulating layer 102 forms the gate of the driving switch device Tb. A second gate insulating layer 104 is also disposed on the fifth metal layer 103. The second gate insulating layer 104 contains a conductive semiconductor 105, which serves as the enable terminal of the driving switch device Tb. The conductive semiconductor 105 has a sixth metal layer 107 and a fourth metal layer 106 at its two ends, respectively. The sixth metal layer 107 serves as the input terminal of the driving switch device Tb.

[0105] Therefore, the preparation structure of the newly added photosensitive device Ta in this embodiment is as follows Figure 8As shown, a first metal layer 108 disposed on a glass substrate 101 forms the second control terminal of the photosensitive device Ta; a first gate insulating layer 102 and a second gate insulating layer 104 are sequentially disposed on the first metal layer 108. A vertical opening 112 is formed on the second gate insulating layer 104 and the first gate insulating layer 102; a photosensitive semiconductor 109 serving as the first control terminal of the photosensitive device Ta is disposed in the second gate insulating layer 104. The two ends of the photosensitive semiconductor 109 are respectively provided with a second metal layer 110 serving as the input terminal of the photosensitive device Ta and a third metal layer 111 serving as the output terminal of the photosensitive device Ta. It should be noted that the third metal layer 111 is disposed above the first opening 112. The first control terminal of the photosensitive device Ta serves as the light-sensing input terminal of the photosensitive device Ta.

[0106] From Figure 5 and Figure 6 It can be seen that the reason why the preparation structure of the newly added photosensitive device Ta is different from the preparation structure of the original driving switch device Tb is that one end of the storage capacitor Ca connected to the photosensitive device Ta is made of the same first metal layer 108 as the second control end. In order to avoid the interference of one end of the storage capacitor on the photosensitive device Ta, the storage capacitor Ca cannot be directly installed in the sub-pixel area Pixel, and needs to be isolated from the photosensitive device Ta. However, because the photosensitive device Ta needs to be connected to the storage capacitor Ca, an opening can only be made in the photosensitive device Ta. Therefore, in order to avoid damage to the first metal layer 108 caused by the opening operation, the first metal layer 108 needs to be set on the glass substrate 101, and the first gate insulating layer 102 and the second gate insulating layer 104 are set together. By performing an opening operation on the first gate insulating layer 102 and the second gate insulating layer 104, the third metal layer 111 is set above the first opening 112, so that the photocurrent generated on the third metal layer 111 can pass through the first opening 112 and be transmitted to the first metal layer 108 of the storage capacitor Ca. For details, please refer to Figure 5 and Figure 6 Point P in FIG. 1 is the output end of the photosensitive device and corresponds to the first opening 112 on the first metal layer 108 .

[0107] The present application provides a display device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the display method in the above-mentioned embodiment one.

[0108] Reference below Figure 9, which shows a schematic diagram of the structure of a display device suitable for implementing the embodiments of the present application. The display device in the embodiments of the present application may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), in-vehicle terminals (such as in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 9 The display device shown is merely an example and should not limit the functions and scope of use of the embodiments of the present application.

[0109] like Figure 9 As shown, the display device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes based on programs stored in a read-only memory (ROM) 1002 or programs loaded from a storage device 1003 into a random access memory (RAM) 1004. RAM 1004 also stores various programs and data required for the operation of the display device. Processing device 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems may be connected to I / O interface 1006: input devices 1007, such as a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008, such as a liquid crystal display (LCD), speaker, vibrator, etc.; storage device 1003, such as a magnetic tape or hard disk; and communication devices 1009. Communication device 1009 can allow the display device to communicate with other devices wirelessly or wired to exchange data. Although the figure shows a display device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or have instead.

[0110] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program comprising program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0111] The display device provided by this application, employing the display method of the aforementioned embodiment, can solve the technical problem of avoiding abnormal display images caused by gate leakage under low-frequency display conditions without increasing power consumption. Compared with the prior art, the beneficial effects of the display device provided by this application are the same as those of the display method provided by the aforementioned embodiment, and the other technical features of the display device are the same as those disclosed in the method of the aforementioned embodiment, and are not further described here.

[0112] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0113] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0114] The above description is only part of the embodiments of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A display method, characterized in that: The display method is applied to a display panel, the display panel being composed of a plurality of sub-pixel regions, the sub-pixel regions being driven and controlled by a pixel driving circuit and a voltage compensation circuit, the voltage output terminal of the voltage compensation circuit being connected to the pixel driving circuit, the voltage input terminal of the voltage compensation circuit being connected to the sub-pixel regions, and the pixel voltage output terminal of the pixel driving circuit being connected to the sub-pixel regions, the display method comprising: When the sub-pixel region is in a light-emitting state, converting the diffusely reflected light generated by the sub-pixel region into a photocurrent for storage; When it is detected that the sub-pixel area has a voltage compensation requirement, the stored photocurrent is output to the pixel driving circuit to perform voltage compensation on the sub-pixel area; In the case where the display panel is a partitioned multi-frequency display panel, the voltage compensation circuit is connected to the first node of the pixel driving circuit, and when a voltage compensation requirement is detected in the sub-pixel area, the step of outputting the stored photocurrent to the pixel driving circuit includes: obtaining a target refresh rate of a display area corresponding to the sub-pixel area, and when detecting that the target refresh rate is greater than a preset refresh rate, determining that the sub-pixel area has a voltage compensation requirement, and sending a conduction control signal to the voltage compensation circuit; The stored photocurrent is transmitted to the first node through the voltage compensation circuit in the on state.

2. The display method according to claim 1, wherein: In the case where the display panel is a low-frequency display panel, the voltage compensation circuit is connected to the first node of the pixel driving circuit, and when it is detected that there is a voltage compensation requirement in the sub-pixel area, the step of outputting the stored photocurrent to the pixel driving circuit includes: determining whether the low-frequency display panel is in a low-frequency display state; If the low-frequency display panel is in the low-frequency display state, determining that there is a voltage compensation requirement in the sub-pixel region, and sending a conduction control signal to the voltage compensation circuit; The stored photocurrent is transmitted to the first node through the voltage compensation circuit in the on state.

3. A display panel, characterized in that: The display panel is applied to the display method according to any one of claims 1 to 2, wherein the display panel includes a display area composed of a plurality of sub-pixel areas, and the sub-pixel areas are driven and controlled by a pixel driving circuit and a voltage compensation circuit; The pixel driving circuit includes a first node and a pixel voltage output terminal, and the voltage compensation circuit includes a voltage input terminal, a light-sensitive input terminal, an output control terminal and a voltage output terminal; The voltage input terminal is connected to the sub-pixel area, the light-sensing input terminal senses diffusely reflected light from the sub-pixel area, the output control terminal is connected to the control device, the voltage output terminal is connected to the first node, and the pixel voltage output terminal is connected to the sub-pixel area; The voltage compensation circuit is configured to receive a pixel voltage generated by the sub-pixel region through the voltage input terminal when the sub-pixel region is in a light-emitting state, and convert the diffusely reflected light sensed through the light-sensitive input terminal into a photocurrent for storage based on the pixel voltage; The voltage compensation circuit is further configured to enter a conduction state according to a conduction control signal input to the output control terminal, and transmit the stored photocurrent to the first node through the voltage output terminal; The pixel driving circuit is configured to, in an on state, use the voltage on the first node as a driving voltage and perform voltage compensation on the sub-pixel region via the pixel voltage output terminal.

4. The display panel according to claim 3, wherein: The voltage compensation circuit includes a first control device, a storage capacitor and a light sensing device; The output terminal of the first control device is connected to the first node, the control terminal of the first control device is connected to the control device, and the input terminal of the first control device is connected to the first terminal of the storage capacitor; The second end of the storage capacitor is connected to the output end of the light sensing device; The first control end of the photosensitive device receives the diffusely reflected light, and the input end of the photosensitive device is connected to the sub-pixel area.

5. The display panel according to claim 4, wherein: The pixel driving circuit includes a driving switch device; The input terminal of the driving switch device is connected to the data signal terminal, the control terminal of the driving switch device is connected to the pixel voltage output terminal, and the output terminal of the driving switch device is connected to the sub-pixel area.

6. The display panel according to claim 5, wherein: Along the light emitting direction of the display panel, when the driving switch device is arranged at the lower left of the sub-pixel area, the light sensing device is arranged at the upper right of the sub-pixel area; The photosensitive device is arranged on a glass substrate; Wherein, the first metal layer provided on the glass substrate forms the second control terminal of the photosensitive device; A first gate insulating layer and a second gate insulating layer are sequentially provided on the first metal layer, and a vertical opening operation is performed on the second gate insulating layer and the first gate insulating layer to form a first opening; A photosensitive semiconductor serving as the first control terminal of the photosensitive device is provided in the second gate insulating layer, and two ends of the photosensitive semiconductor are respectively provided with a second metal layer serving as the input terminal of the photosensitive device and a third metal layer serving as the output terminal of the photosensitive device.

7. The display panel according to claim 6, wherein: The third metal layer is disposed above the first opening; The first opening is used to transmit the photocurrent generated by the first control terminal connected to the third metal layer to the storage capacitor for storage.

8. The display panel according to claim 7, wherein: The pixel driving circuit further includes a second control device, a third control device, a fourth control device, a fifth control device and a first capacitor; The control terminal of the second control device is connected to the pixel voltage output terminal of the previous stage, and the output terminal of the second control device is connected to the control terminal of the third control device; The control end of the fourth control device and the control end of the fifth control device are respectively connected to the next-stage pixel voltage output end; The output end of the second control device is connected to the input end of the fourth control device, and the output end of the third control device is connected to the input end of the fifth control device; The first capacitor is connected between the output terminal of the second control device and the output terminal of the third control device, and one terminal of the first capacitor is connected to the pixel voltage output terminal.

9. A display device, characterized in that: The display device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the display method according to any one of claims 1 to 2.

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