Display method, display panel and display equipment

Abstract

The invention discloses a display method, a display panel and a display device, and relates to the technical field of display, and the method comprises the steps: converting diffuse reflection light generated by a sub-pixel region into light current for storage based on a voltage compensation circuit under the condition that the sub-pixel region is in a light emitting state, and when it is detected that the sub-pixel region has a voltage compensation demand, outputting the light current; and the stored light current is output to the pixel driving circuit, and voltage compensation is performed on the sub-pixel region, so that the voltage compensation is performed on the sub-pixel region through the voltage compensation circuit under the condition that external voltage does not need to be accessed to cause power consumption improvement, and picture improvement of the corresponding display region is realized.

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 process of pursuing energy saving and extending battery life, existing display devices usually 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, 15 Hz or lower, thereby reducing overall power consumption.

[0003] However, this method of reducing the frequency will cause gate leakage in the driving transistor, resulting in flickering and insufficient display brightness. In order to restore the display brightness and stabilize the display, the driving voltage of the pixel area is usually increased. However, this approach will bring additional power consumption, which is contrary to the original intention of designing a low-frequency display state to reduce power consumption. Summary of the invention

[0004] The main purpose of the present 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 under low-frequency display state without increasing power consumption.

[0005] To achieve the above-mentioned purpose, the present application proposes a display method, which is applied to a display panel, the display panel is composed of a plurality of 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: 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; When it is detected that there is a voltage compensation requirement in the sub-pixel region, the stored photocurrent is output to the pixel driving circuit to perform voltage compensation on the sub-pixel region.

[0006] 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, 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: 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 there is a voltage compensation requirement in the sub-pixel area, and sending a conduction control signal to a voltage compensation circuit; The stored photocurrent is transmitted to the first node through the voltage compensation circuit in the on state.

[0007] 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, 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: Determine whether the low-frequency display panel is in a low-frequency display state; 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; The stored photocurrent is transmitted to the first node through the voltage compensation circuit in the on state.

[0008] In addition, to achieve the above-mentioned purpose, 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 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 region, the light-sensing input terminal senses diffusely reflected light in the sub-pixel region, 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 region; A voltage compensation circuit is used to receive a pixel voltage generated by the sub-pixel region through a voltage input terminal when the sub-pixel region is in a light-emitting state, and based on the pixel voltage, convert the diffusely reflected light sensed through the photosensitive input terminal into a photocurrent for storage; The voltage compensation circuit is further used to enter a conduction state according to a conduction control signal connected to the output control terminal, and transmit the stored photocurrent to the first node through the voltage output terminal; 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 a sub-pixel region via a pixel voltage output terminal.

[0009] In one embodiment, the voltage compensation circuit includes a first control device, a storage capacitor and a photosensitive 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.

[0010] In one embodiment, 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.

[0011] 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; The photosensitive device is arranged on the glass substrate; Wherein, the first metal layer disposed 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 arranged 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; The second gate insulating layer is provided with a photosensitive semiconductor as the first control end of the photosensitive device, and the two ends of the photosensitive semiconductor are respectively provided with a second metal layer as the input end of the photosensitive device and a third metal layer as the output end of the photosensitive device.

[0012] In one embodiment, 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.

[0013] 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; 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.

[0014] In addition, to achieve the above objectives, 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.

[0015] One or more technical solutions proposed in this application have at least the following technical effects: A display method implemented on a display panel is proposed. The display panel is composed of a plurality of 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 comprises: when the sub-pixel area is in a light-emitting state, converting diffuse reflected light generated by the sub-pixel area into photocurrent for storage; when it is detected that there is a voltage compensation demand for the sub-pixel area, outputting the stored photocurrent to the pixel driving circuit to perform voltage compensation on the sub-pixel area.

[0016] The present application adds 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 when it is in a light-emitting state, converts the diffuse 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 ensure the display demand of the display area corresponding to the sub-pixel area, so that the display area has an abnormal picture phenomenon of dark state or flickering picture. At this time, the photocurrent is transmitted to the pixel driving circuit, the conduction ability of the pixel driving circuit is improved, and the voltage value transmitted to the sub-pixel area is enhanced. In this way, the sub-pixel area is voltage compensated without connecting to an external voltage, which causes an increase in power consumption, so as to achieve picture improvement in the corresponding display area. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of a flow chart provided for an embodiment of a display method of the present application; Figure 2 A circuit structure diagram when the display panel of the present application is a partitioned multi-frequency display panel; Figure 3 This is a circuit structure diagram when the display panel of the present application is a low-frequency display panel; Figure 4 It is a timing diagram of the voltage output terminals of each pixel within one frame time under high and low frequency partitioning; Figure 5 The display panel is a schematic diagram of the component layout of a partitioned multi-frequency display panel; Figure 6 The schematic diagram of the component layout of a display panel which is a low-frequency display panel; Figure 7 A schematic diagram of the structure of the drive switch device; Figure 8 The schematic diagram of the preparation structure of the photosensitive device; Fig. 9 It is a schematic diagram of the device structure of the hardware operating environment involved in the display method in the embodiment of the present application.

[0020] Description of Figure Numbers: Pixel, sub-pixel area; 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; 20. voltage compensation circuit; T1, first control device; Ca, storage capacitor; Ta, photosensitive device; La, control end of the first control device; 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; 108, first metal layer; 109, photosensitive semiconductor; 110, second metal layer; 111, third metal layer; 112, first opening.

[0021] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0023] 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.

[0024] 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 a plurality of 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 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 for the sub-pixel area, outputting the stored photocurrent to the pixel driving circuit to perform voltage compensation on the sub-pixel area.

[0025] The frequency reduction method proposed in the prior art will cause gate leakage in the driving transistor, resulting in screen flickering and insufficient display brightness in some display areas that require high-frequency display. In order to restore the display brightness and stabilize the screen display, the driving voltage of the pixel area is usually increased. However, this approach will bring additional power consumption, which is contrary to the original intention of designing a low-frequency display state to reduce power consumption.

[0026] 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, converts the diffuse 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 not enough to ensure the display demand of the display area corresponding to the sub-pixel area, so that the display area has an abnormal picture phenomenon of dark state or flickering picture, at this time, the photocurrent is transmitted to the pixel driving circuit, the conduction ability of the pixel driving circuit is improved, and the voltage value transmitted to the sub-pixel area is enhanced, so that the sub-pixel area is voltage compensated without connecting to an external voltage, which causes an increase in power consumption, and the picture of the corresponding display area is improved.

[0027] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device, a display device, etc. capable of realizing the above functions. The following takes a display device as an example to illustrate this embodiment and the following embodiments.

[0028] Based on this, the present application embodiment provides a display method, referring to Figure 1 , Figure 1 It is a flowchart diagram of the first embodiment of the display method of the present application.

[0029] In this embodiment, the display method includes steps S10 to S20: 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.

[0030] Because the display method that can be implemented in this embodiment is implemented based on the improved display panel of this embodiment, it is necessary to first describe the structure of the improved display panel.

[0031] In this embodiment, a voltage compensation circuit is added to the original pixel driving circuit for performing voltage compensation on the voltage transmitted to 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.

[0032] Specifically: a voltage input terminal of a voltage compensation circuit is connected to a sub-pixel region, a photosensitive input terminal of the voltage compensation circuit senses diffusely reflected light in the sub-pixel region, an output control terminal of the voltage compensation circuit is connected to a control device, and a voltage output terminal of the voltage compensation circuit is connected to a first node of a pixel driving circuit.

[0033] Because the pixel voltage output terminal of the pixel driving circuit is connected to the sub-pixel area, the voltage compensation circuit provided in the present embodiment can receive excess diffusely reflected light emitted by the sub-pixel area through its photosensitive input terminal when the sub-pixel area to which it is connected is in a light-emitting state, and form electron-hole pairs in the photosensitive input terminal. Because the sub-pixel area will enter the light-emitting state only when there is a voltage, the voltage input terminal 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 terminal. Under the action of the pixel voltage, the electron-hole pairs in the photosensitive input terminal will separate under the action of the electric field to form a photocurrent. At this time, the voltage compensation circuit in a closed state will first store the photocurrent.

[0034] 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.

[0035] Step S20: when it is detected that there is a voltage compensation requirement in the sub-pixel region, the stored photocurrent is output to the pixel driving circuit to perform voltage compensation on the sub-pixel region.

[0036] 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, that is, it is determined that there is a need for voltage compensation in the sub-pixel area at this time, the control device is controlled to transmit a conduction control signal to the output control end of the voltage compensation circuit, so that the voltage compensation circuit is changed to an on 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 caused by insufficient voltage.

[0037] 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 under the low-frequency display state.

[0038] In this embodiment, a voltage compensation circuit is added 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 ensure the display demand of the display area corresponding to the sub-pixel area, so that the display area has an abnormal picture phenomenon of dark state or flickering picture. At this time, the photocurrent is transmitted to the pixel driving circuit, the conduction ability of the pixel driving circuit is improved, and the voltage value transmitted to the sub-pixel area is enhanced. In this way, the sub-pixel area is voltage compensated without connecting to an external voltage, which causes an increase in power consumption, so as to achieve picture improvement in the corresponding display area.

[0039] 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 area Pixel when the display panel is a partitioned multi-frequency display panel and 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 photosensitive input terminal, an output control terminal, and a voltage output terminal.

[0040] according to Figure 2 and Figure 3It can be seen that the voltage compensation circuit 20 includes a first control device T1, a storage capacitor Ca and a photosensitive device Ta. The output end of the first control device T1 is used as a voltage output end and is connected to the first node A; the control end La of the first control device T1 is used as an output control end and is connected to the control device; the input end of the first control device T1 is connected to the first end of the storage capacitor Ca; the second end of the storage capacitor Ca is connected to the output end of the photosensitive device Ta; the first control end of the photosensitive device Ta is used as a light-sensitive input end to receive diffusely reflected light; the input end of the photosensitive device Ta is used as a voltage input end and is connected to the sub-pixel area Pixel.

[0041] The pixel driving circuit 10 includes a driving switch device Tb, wherein 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 is used as the pixel voltage output terminal G(n) and is connected to the sub-pixel area Pixel.

[0042] It should be noted that Figure 2 and Figure 3 The pixel driving circuit 10 is also used to store and reset the driving voltage in the first capacitor Cb according to the conduction state of each control device included in it at different timings. It includes a second control device T2, the input end of the second control device T2 is connected to the voltage terminal VDS, the conduction state of the second control device T2 is controlled by the previous pixel voltage output terminal G(n-1), the output end of the second control device T2 is respectively connected to the control end of the third control device T3 and the input end of the fourth control device T4, the input end of the third control device T3 is connected to the clock signal terminal CK, the output end of the third control device T3 is connected to the input end of the fifth control device T5, the control end of the fourth control device T4 and the control end of the fifth control device T5 are connected to the next pixel voltage output terminal G(n+1), and the output end of the fourth control device T4 and the output end of the fifth control device T5 are connected to the gate low voltage terminal VGL. The first capacitor Cb is connected between the output end of the second control device T2 and the output end of the third control device T3, and one end of the first capacitor Cb is connected to the pixel voltage output terminal G(n).

[0043] The difference is that the access method of the voltage compensation circuit 20 is different under different display panel types.

[0044] ①Reference Figure 2 In the case where the display panel is a partitioned multi-frequency display panel, because the overall display area corresponding to the display panel is divided into multiple display areas, each display area can be driven independently at a different frequency, so at this time, the voltage compensation circuit 20 is connected to the following Figure 2As shown in the figure, because the first node A is close to the pixel voltage output terminal G(n), that is, close to the gate of the driving switch device Tb set in the pixel driving circuit 10, cross interference caused by frequency change can be avoided. Voltage compensation near the gate can ensure the stable driving performance of the driving switch device Tb under various frequencies. The corresponding step S20 specifically includes steps S21-S22: Step S21, obtaining a target refresh rate of a display area corresponding to a sub-pixel area, and when detecting that the target refresh rate is greater than a preset refresh rate, determining that there is a voltage compensation requirement in the sub-pixel area, and sending a conduction control signal to a voltage compensation circuit.

[0045] 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 demand. 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.

[0046] 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 into the sub-pixel area Pixel under 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 demand 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, so as to turn on the transmission channel between the storage capacitor Ca and the pixel driving circuit 10.

[0047] Step S22: transmitting the stored photocurrent to the first node A through the voltage compensation circuit 20 which is in the on state.

[0048] 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, thereby compensating the driving voltage on the pixel driving circuit 10 through the first node A, increasing the voltage value output from the pixel voltage output terminal G(n) to the driving switch device Tb, and improving the conduction capacity of the driving switch device Tb.

[0049] 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 to transfer the photocurrent stored in the storage capacitor Ca to the corresponding driving switch device Tb to enhance the pixel voltage on the sub-pixel area Pixel.

[0050] Combined with Figure 4 The timing example shown is used for explanation. Assume that the sub-pixel area 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 is the low-frequency area S1 within one frame time, and 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 one frame time.

[0051] 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 first pixel voltage output terminal G1, the second pixel voltage output terminal G2 and the third pixel voltage output terminal G3 are not driven for voltage compensation. 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.

[0052] 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 additional power consumption, so as to achieve a high- and low-frequency partitioned display effect with low power consumption when the display panel is in a low-frequency display state.

[0053] ②Reference Figure 3 In the case where the display panel is a low-frequency display panel, because 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 3 When 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, so that the driving voltage on the first node A decreases. The voltage on the first node A is used to turn on the driving switch device Tb. Therefore, when the driving voltage on the first node A decreases, the driving voltage output to the driving switch device Tb will 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, therefore step S20 specifically includes steps S24 to S26: Step S24, determining whether the low-frequency display panel is in a low-frequency display state.

[0054] 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 at this time has a voltage instability phenomenon.

[0055] 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 .

[0056] 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 ability 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, so as to turn on the transmission channel between the storage capacitor Ca and the pixel driving circuit 10.

[0057] Step S26: transmitting the stored photocurrent to the first node A through the voltage compensation circuit 20 which is in the on state.

[0058] 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 at this time will be output to the first node A by the first control device T1 whose channel is turned on. The photocurrent is transmitted to the control end of the driving switch device Tb via the pixel voltage output terminal G(n) through the first node A. By raising the driving voltage on the first node A, the driving voltage of the first node A drops due to the gate leakage current defect of the second control device T2, thereby avoiding the problem of reduced conduction ability of the driving switch device Tb.

[0059] In this embodiment, according to different display panel types, the access position of the newly added voltage compensation circuit 20 is dynamically planned to enhance the driving voltage compensation effect of the photocurrent stored in the voltage compensation circuit 20 on the driving switching device Tb, thereby effectively solving the display problems existing in different display panel types under low-frequency display conditions.

[0060] In addition, because the connection position of the voltage compensation circuit 20 is different in different display panel types, the component layout diagrams of the corresponding display panels after the voltage compensation circuit 20 is connected are also different. Figure 5 The display panel is a component layout diagram of a partitioned multi-frequency display panel, Figure 6 The component layout diagram of the display panel is a low-frequency display panel. The component layout diagram is equivalent to a specific circuit structure. For the sake of easy distinction, the materials constituting 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.

[0061] It can be seen that, because the driving switch devices Tb in the pixel driving circuit 10 in the two component layout diagrams shown in this embodiment are all arranged at the lower left of the corresponding sub-pixel area Pixel, the photosensitive device Ta of the voltage compensation circuit 20 can only be arranged at the other opening of the sub-pixel area Pixel, that is, the upper right of the sub-pixel area Pixel, to avoid interference between different devices. In the actual setting process, the position of the photosensitive device Ta can be dynamically adjusted according to the specific component layout state.

[0062] 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 arranged at the lower left of the sub-pixel area Pixel, the fourth metal layer 106 forming the output end of the driving switch device Tb is connected to the sub-pixel area Pixel. Specifically, it is arranged on the glass substrate 101, and is isolated from the glass substrate 101 based on a first gate insulating layer 102, and a fifth metal layer 103 arranged on the first gate insulating layer 102 forms the gate of the driving switch device Tb, and a second gate insulating layer 104 is also arranged on the fifth metal layer 103, and a conductive semiconductor 105 serving as an enable end of the driving switch device Tb is arranged in the second gate insulating layer 104, and the conductive semiconductor 105 has a sixth metal layer 107 and a fourth metal layer 106 at both ends, respectively, wherein the sixth metal layer 107 is the input end of the driving switch device Tb.

[0063] Therefore, the preparation structure of the newly added photosensitive device Ta in this embodiment is as follows Figure 8As shown, the first metal layer 108 disposed on the glass substrate 101 forms the second control end of the photosensitive device Ta; the first gate insulating layer 102 and the second gate insulating layer 104 are sequentially disposed on the first metal layer 108, and the second gate insulating layer 104 and the first gate insulating layer 102 are vertically opened to form a first opening 112; the second gate insulating layer 104 is provided with a photosensitive semiconductor 109 as the first control end of the photosensitive device Ta, and the two ends of the photosensitive semiconductor 109 are respectively provided with a second metal layer 110 as the input end of the photosensitive device Ta, and a third metal layer 111 as the output end of the photosensitive device Ta. It should be noted that the third metal layer 111 is disposed above the first opening 112. Among them, the first control end of the photosensitive device Ta serves as the light-sensitive input end of the photosensitive device Ta.

[0064] 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 the figure is the output end of the photosensitive device and corresponds to the first opening 112 on the first metal layer 108.

[0065] 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 executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the display method in the above-mentioned embodiment 1.

[0066] Reference below Fig. 9, which shows a schematic diagram of the structure of a display device suitable for implementing an embodiment of the present application. The display device in the embodiment 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: tablet computers), PMPs (Portable Media Players: portable multimedia players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Fig. 9 The display device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0067] like Fig. 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 according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the display device are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the display device to communicate with other devices wirelessly or by wire 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 alternatively.

[0068] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a 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 through 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.

[0069] The display device provided by the present application adopts the display method in the above embodiment, which can solve the technical problem of avoiding abnormal display screen caused by gate leakage phenomenon in low-frequency display state without increasing power consumption. Compared with the prior art, the beneficial effects of the display device provided by the present application are the same as the beneficial effects of the display method provided by the above embodiment, and other technical features in the display device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0070] It should be understood that the various parts disclosed in this application can be implemented by 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.

[0071] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0072] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications 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 is composed of a plurality of 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: When the sub-pixel region is in a light-emitting state, converting diffusely reflected light generated by the sub-pixel region into photocurrent for storage; When it is detected that there is a voltage compensation requirement in the sub-pixel region, the stored photocurrent is output to the pixel driving circuit to perform voltage compensation on the sub-pixel region.

2. The display method according to claim 1, characterized in that: 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 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: 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 there is a voltage compensation requirement for the sub-pixel area, 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. The display method according to claim 1, characterized in that: 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, 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; The stored photocurrent is transmitted to the first node through the voltage compensation circuit in the on state.

4. A display panel, characterized in that: The display panel is applied to the display method according to any one of claims 1 to 3, wherein the display panel comprises 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 region, the light-sensing input terminal senses diffusely reflected light from the sub-pixel region, the output control terminal is connected to a control device, the voltage output terminal is connected to the first node, and the pixel voltage output terminal is connected to the sub-pixel region; The voltage compensation circuit is used to receive the pixel voltage generated by the sub-pixel area through the voltage input terminal when the sub-pixel area is in a light-emitting state, and convert the diffusely reflected light sensed through the photosensitive 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 connected to the output control terminal, and transmit the stored photocurrent to the first node through the voltage output terminal; 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.

5. The display panel according to claim 4, wherein: The voltage compensation circuit includes a first control device, a storage capacitor and a photosensitive 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 photosensitive 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.

6. The display panel according to claim 5, 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.

7. The display panel according to claim 6, 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 photosensitive 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 disposed 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 disposed 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; The second gate insulating layer is provided with a photosensitive semiconductor as the first control end of the photosensitive device, and the two ends of the photosensitive semiconductor are respectively provided with a second metal layer as the input end of the photosensitive device and a third metal layer as the output end of the photosensitive device.

8. The display panel according to claim 7, 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 end connected to the third metal layer to the storage capacitor for storage.

9. The display panel according to claim 6, 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.

10. A display device, characterized in that: The display device comprises: 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 3.

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