Brightness adjusting method of display device and display device

Abstract

The invention provides a brightness adjusting method of a display device and the display device, and the method comprises the steps that an optical fingerprint sensor obtains light rays emitted by a display panel, and sends first brightness information to a display driving integrated circuit, and the first brightness information comprises the brightness characteristics of the light rays; the display driving integrated circuit receives the first brightness information and sends a first adjusting signal to the display panel, and the first adjusting signal is used for adjusting the display brightness of the display panel. The display device can acquire the brightness information when the first frame is displayed through the light fingerprint sensor, and adjust the brightness when the second frame is displayed according to the brightness characteristics when the first frame is displayed, so that the flicker problem of the display panel can be simply relieved.

Description

Technical Field

[0001] This application relates to the field of display technologies, and more particularly, to a method for adjusting the brightness of a display device and a display device. Background Art

[0002] Organic light-emitting diode (OLED) display technology has been widely applied due to its excellent light-emitting performance. Due to the characteristics of OLED devices themselves, there may be significant differences in the brightness between different frames displayed by OLED devices, resulting in a situation where the display brightness fluctuates significantly, causing a serious flicker problem. Therefore, there is an urgent need for a simple brightness adjustment scheme that can effectively alleviate the flicker problem. Summary of the Invention

[0003] This application provides a method for adjusting the brightness of a display device and a display device. The display device provided by this application can effectively reduce the brightness flicker problem of the display panel.

[0004] In a first aspect, a method for adjusting the brightness of a display device is provided. The display device includes a display panel, an optical fingerprint sensor, and a display driving integrated circuit. The display panel and the optical fingerprint sensor are electrically connected to the display driving integrated circuit respectively. The method includes: the optical fingerprint sensor obtains the light emitted by the display panel and sends first brightness information to the display driving integrated circuit, where the first brightness information includes the brightness characteristics of the light; the display driving integrated circuit sends a first adjustment signal to the display panel according to the first brightness information, and the first adjustment signal is used to adjust the display brightness of the display panel.

[0005] Based on the above technical solution, the display driving integrated circuit can adjust the display brightness of the display panel through the brightness characteristics of the light obtained by the optical fingerprint sensor, thereby alleviating the flicker problem of the display panel.

[0006] In combination with the first aspect, in some implementation manners of the first aspect, the first adjustment signal is specifically used to adjust the brightness when the display panel displays a second frame, and the second frame is the next frame after the display panel displays a first frame.

[0007] Based on the above technical solution, the display device can obtain the brightness information when displaying the first frame through the light fingerprint sensor, and adjust the brightness when displaying the second frame according to the brightness characteristics when displaying the first frame, thereby being able to simply alleviate the flicker problem of the display panel.

[0008] In combination with the first aspect, in some implementations of the first aspect, the first brightness information includes a first fluctuation value F, and the first fluctuation value F is used to represent the amplitude of brightness fluctuation when the display panel displays the first frame.

[0009] In some possible implementations, the first fluctuation value F satisfies the following formula:

[0010]

[0011] Wherein, the first maximum brightness value L max represents the maximum brightness value when the display panel displays the first frame, and the first minimum brightness value L min represents the minimum brightness value when the display panel displays the first frame.

[0012] In combination with the first aspect, in some implementations of the first aspect, the method further includes: the display driving integrated circuit determines a first difference, and determines the first adjustment signal according to the first difference, wherein the first difference is the difference between the first fluctuation value F and a target fluctuation value, and the target fluctuation value is a preset value.

[0013] Based on the above technical solution, by determining the amplitude of brightness fluctuation when the display panel displays the first frame, the parameters of the first adjustment signal can be determined according to the amplitude of brightness fluctuation, and the effect of alleviating the flicker problem of the display panel can be improved.

[0014] In combination with the first aspect, in some implementations of the first aspect, the display panel includes a pixel circuit and a driving circuit connected electrically, and the method further includes: when the driving circuit receives the first adjustment signal, the driving circuit sends a first adjustment parameter to the pixel circuit according to the first adjustment signal, and the first adjustment parameter includes one or more of an ESTV signal parameter, a second initialization voltage value Vinit2 parameter, a driving voltage value ELVDD parameter, or a common terminal voltage ELVSS parameter.

[0015] Based on the above technical solution, by adjusting multiple variable signals in the driving circuit and the pixel circuit, the flexibility in alleviating the flicker problem of the display panel can be improved.

[0016] In combination with the first aspect, in some implementations of the first aspect, the method further includes: the display driving integrated circuit determines the first adjustment signal according to a first mapping relationship, and each mapping relationship in the first mapping relationship is used to indicate the corresponding relationship between a first brightness information and a first adjustment signal.

[0017] Based on the above technical solution, the scheme for adjusting brightness can be directly retrieved through the first mapping relationship, which is beneficial to the efficiency in alleviating the flicker problem of the display panel.

[0018] In combination with the first aspect, in some implementations of the first aspect, the first mapping relationship is stored in the display driving integrated circuit.

[0019] Based on the above technical solution, the first mapping relationship can be stored in the display device, and during the use of the display device, the user can alleviate the flicker problem of the display panel through the first mapping relationship, improving the user experience.

[0020] In a second aspect, a display device is provided. The display device includes: a display panel, an optical fingerprint sensor, and a display driving integrated circuit. The display panel and the optical fingerprint sensor are electrically connected to the display driving integrated circuit respectively. The optical fingerprint sensor is configured to acquire light emitted by the display panel and send first brightness information to the display driving integrated circuit, where the first brightness information includes the brightness characteristics of the light. The display driving integrated circuit is configured to send a first adjustment signal to the display panel according to the first brightness information, and the first adjustment signal is used to adjust the display brightness of the display panel.

[0021] Based on the above technical solution, the display driving integrated circuit can adjust the display brightness of the display panel through the brightness characteristics of the light acquired by the optical fingerprint sensor, thereby alleviating the flicker problem of the display panel.

[0022] In combination with the second aspect, in some implementations of the second aspect, the first adjustment signal is specifically used to adjust the brightness when the display panel displays the second frame, and the second frame is the next frame after the display panel displays the first frame.

[0023] Based on the above technical solution, the display device can acquire the brightness information when displaying the first frame through the light fingerprint sensor, and adjust the brightness when displaying the second frame according to the brightness characteristics when displaying the first frame, thereby being able to simply alleviate the flicker problem of the display panel.

[0024] In combination with the second aspect, in some implementations of the second aspect, the first brightness information includes a first fluctuation value F, and the first fluctuation value F is used to represent the brightness fluctuation amplitude when the display panel displays the first frame.

[0025] In some possible implementations, the first fluctuation value F satisfies the following formula:

[0026]

[0027] where the first maximum value L max represents the maximum brightness value when the display panel displays the first frame, and the first minimum value L min represents the minimum brightness value when the display panel displays the first frame.

[0028] Based on the above technical solution, by determining the amplitude of brightness fluctuation when the display panel displays the first frame, the parameters of the first adjustment signal can be determined according to the amplitude of brightness fluctuation, thereby improving the effect of alleviating the flicker problem of the display panel.

[0029] Combined with the second aspect, in some implementation manners of the second aspect, the display driving integrated circuit is further configured to determine a first difference, and determine the first adjustment signal according to the first difference, where the first difference is the difference between the first fluctuation value F and a target fluctuation value, and the target fluctuation value is a preset value.

[0030] Combined with the second aspect, in some implementation manners of the second aspect, the display panel includes a pixel circuit and a driving circuit connected electrically; when the driving circuit receives the first adjustment signal, the driving circuit is further configured to send a first adjustment parameter to the pixel circuit according to the first adjustment signal.

[0031] Combined with the second aspect, in some implementation manners of the second aspect, the first adjustment parameter includes one or more of an ESTV signal parameter, a second initialization voltage value Vinit2 parameter, a driving voltage value ELVDD parameter, or a common terminal voltage ELVSS parameter.

[0032] Based on the above technical solution, by adjusting multiple variable signals in the driving circuit and the pixel circuit, the flexibility in alleviating the flicker problem of the display panel can be improved.

[0033] Combined with the second aspect, in some implementation manners of the second aspect, the display driving integrated circuit is further configured to determine the first adjustment signal according to a first mapping relationship, and each mapping relationship in the first mapping relationship is used to indicate the corresponding relationship between one piece of the first brightness information and one first adjustment signal.

[0034] Based on the above technical solution, the solution for adjusting brightness can be directly retrieved through the first mapping relationship, which is beneficial to the efficiency in alleviating the flicker problem of the display panel.

[0035] Combined with the second aspect, in some implementation manners of the second aspect, the first mapping relationship is stored in the display driving integrated circuit.

[0036] Based on the above technical solution, the first mapping relationship can be stored in the display device, and during the process of using the display device by the user, the flicker problem of the display panel can be alleviated through the first mapping relationship, thereby improving the user experience.

[0037] In a third aspect, a display device is provided. The display device includes a display panel, an optical fingerprint sensor, and a display driving integrated circuit. The display panel and the optical fingerprint sensor are electrically connected to the display driving integrated circuit respectively to implement the brightness adjustment method as described in the first aspect and any one of its implementation manners.

[0038] In a fourth aspect, a readable storage medium is provided, on which a program is stored. When the program is executed by a processor, the processor is caused to implement the brightness adjustment method as described in the first aspect and any one of its implementation manners.

[0039] In a fifth aspect, a program product is provided. When the program product runs on a display device, the display device is caused to implement the brightness adjustment method as described in the first aspect and any one of its implementation manners. Description of the Drawings

[0040] Figure 1 FIG. is a schematic structural diagram of a display device provided by an embodiment of the present application;

[0041] Figure 2 FIG. is a schematic diagram of a pixel circuit provided by an embodiment of the present application;

[0042] Figure 3 FIG. is a schematic structural diagram of another display device provided by an embodiment of the present application;

[0043] Figure 4 FIG. is a schematic diagram of the corresponding relationship between an ESTV signal and the brightness curve of a pixel circuit;

[0044] Figure 5 FIG. is a schematic flowchart of a brightness adjustment method for a display device provided by an embodiment of the present application. Detailed Embodiments

[0045] Next, the technical solutions in the present application will be described with reference to the drawings.

[0046] Embodiments of the present application will present various aspects, embodiments, or features around a system including multiple devices, components, modules, etc. It should be understood and appreciated that each system may include additional devices, components, modules, etc., and / or may not include all the devices, components, modules, etc. discussed in conjunction with the drawings. In addition, combinations of these solutions may also be used.

[0047] In addition, in the embodiments of the present application, words such as "exemplary" and "for example" are used to represent examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of the word "exemplary" is intended to present concepts in a specific manner.

[0048] The business scenarios described in the embodiments of this application are for more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. Those of ordinary skill in the art will know that with the evolution of technology and the emergence of new business scenarios, the technical solutions provided by the embodiments of this application are equally applicable to similar technical problems.

[0049] In this specification, the reference to "one embodiment" or "some embodiments" etc. means that in one or more embodiments of this application, the specific features, structures or characteristics described in combination with that embodiment are included. Thus, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all of the embodiments", unless otherwise specifically emphasized in another way. The terms "comprise", "include", "have" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in another way.

[0050] In the embodiments of this application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can mean: including the case of A existing alone, the case of A and B existing simultaneously, and the case of B existing alone, where A and B can be singular or plural. The character " / " generally means that the associated objects before and after are in an "or" relationship. "At least one (item)" or its similar expression below refers to any combination of these items, including any combination of a single item or plural items. For example, at least one (item) of a, b, or c can mean: a, b, c, a - b, a - c, b - c, or a - b - c, where a, b, c can be single or multiple.

[0051] In the description of the embodiments of this application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "vertical", "horizontal" etc. is defined relative to the orientation or position where the components in the drawings are schematically placed. It should be understood that these directional terms are relative concepts, and they are used for description and clarification relative to, rather than indicating or implying that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. It can change accordingly with the change of the orientation where the components in the drawings are placed, and thus cannot be understood as a limitation on this application.

[0052] In the embodiments of the present application, the same reference numeral is used to denote the same component or the same part. For the same parts in the embodiments of the present application, only one of the parts or components may be marked with a reference numeral in the figure. It should be understood that the reference numerals are equally applicable to other identical parts or components. In addition, the parts and components in the figures are not drawn to scale, and the sizes and dimensions of the parts and components shown in the figures are only exemplary and should not be construed as a limitation to the present application.

[0053] The embodiments of the present application provide a display device, and the display device may be, for example, an electronic device. The electronic device may be, for example, a consumer electronic product, a home electronic product, a vehicle-mounted electronic product, or a financial electronic product. Among them, the consumer electronic product may be a mobile phone, a tablet computer (pad), a laptop computer, an e-reader, a personal computer (PC), a personal digital assistant (PDA), a desktop display, a smart wearable product (for example, a smart watch, a smart bracelet), a virtual reality (VR) electronic device, an augmented reality (AR) electronic device, a drone, etc. The home electronic product may be a smart door lock, a television, a refrigerator, a small household electrical appliance for charging (for example, a soymilk machine, a floor sweeping robot), etc. The vehicle-mounted electronic product may be a vehicle-mounted navigator, a vehicle-mounted DVD, etc. The financial electronic product may be an ATM machine, an electronic device for self-service business handling, etc.

[0054] The embodiments of the present application do not impose any special restrictions on the specific form of the above-mentioned electronic device. For the convenience of description in the following embodiments, the display device is taken as an example of a mobile phone for illustration.

[0055] Figure 1 It is a schematic diagram of the architecture of a display device provided by the embodiments of the present application.

[0056] Figure 1 Taking the display device 1 as an example of a mobile phone for illustration, it is only an illustration in the embodiments of the present application.

[0057] The display driver integrated circuit (DDIC) 20 is further configured to output the scan control signals SCS (such as a clock signal CLK, a gate start signal STV, a reset signal RST, etc.) required for display to the display panel 10.

[0058] In a possible embodiment, the display panel 10 is a liquid crystal display (LCD). Based on this, the display device 1 further includes a backlight module (BLU) located on the back of the liquid crystal display panel. The backlight module can provide a light source to the liquid crystal display panel so that each subpixel in the liquid crystal display panel can emit light to achieve image display.

[0059] In another possible embodiment, the display panel 10 is a self-emitting display panel 10 such as an organic light-emitting diode (OLED) display panel 10, an active-matrix organic light-emitting diode (AMOLED) display panel 10, a mini organic light-emitting diode (Mini-OLED) display panel 10, a micro light-emitting diode (Micro-LED) display panel 10, a micro organic light-emitting diode (Micro-OLED) display panel 10, or a quantum dot light emitting diodes (QLED) display panel 10. In this case, the display panel 10 can be a rigid display panel or a flexible display panel.

[0060] For any of the above display panels 10, the display panel 10 includes a pixel circuit 11 and a driving circuit 12.

[0061] The driving circuit 12 receives the scan control signal SCS provided by the display driver integrated circuit 20, and the pixel circuit 11 can receive the voltage signal provided by the driving circuit 12 and convert it into a current flowing through the light-emitting device.

[0062] In this application, the pixel circuit 11 is described by taking the matrix arrangement as an example. The pixel circuits 11 arranged in a row along the horizontal direction are called the same row of pixel circuits 11, and the pixel circuits 11 arranged in a row along the vertical direction are called the same column of pixel circuits 11.

[0063] In some embodiments, the pixel circuit 11 generally includes a driving circuit composed of multiple transistors and a light-emitting unit. The driving circuit generates a driving current to drive the light-emitting unit to emit light, so as to realize the light emission of the pixel circuit 11.

[0064] The driving circuit can be a gate driver on array (GOA) circuit, and the GOA circuit can output different control signals to the pixel circuit to control the transistors in the pixel circuit.

[0065] The GOA circuit is the abbreviation of the gate on array circuit, which refers to the circuit integrating the gate drive on the array substrate. The GOA panel adopts the same manufacturing process as the thin-film transistor to fabricate the line scanning drive circuit on the glass panel to realize the line-by-line scanning drive function.

[0066] When the scanning row is selected and gated, the GOA circuit outputs a high-voltage level signal, and when it is not selected and gated, the row outputs a low-level voltage signal until the next frame signal is input.

[0067] First, different GOA signals in the GOA circuit are described.

[0068] The GOA signal includes a gate start (start vertical signal, STV) signal, which is used to activate the first row of GOA units and trigger line-by-line scanning. The GOA signal also includes a reset (reset signal, RESET) signal, which is used to turn off the output of the current row of GOA units and clear the residual charge to ensure timing stability.

[0069] The STV signal can further include an extended gate start (extended start vertical signal, ESTV) signal, a global gate start (global start vertical signal, GSTV) signal, and a secondary (next-level start vertical signal, NSTV) gate start signal.

[0070] The ESTV signal is used in the scenario of parallel driving of multiple groups of GOA circuits. Each group of GOA units is assigned an independent ESTV signal to support the partition scanning of high-resolution panels.

[0071] The GSTV signal has a similar function to the STV signal, but a wider coverage range. In an extra-large display panel, the GSTV signal synchronizes the start timing of multi-region GOA units through long-distance wiring to reduce the scanning delay.

[0072] The NSTV signal is used for the timing transfer between cascaded GOA units. For example, when a row of GOA units completes scanning, its output signal serves as the NSTV signal of the next row to achieve line-by-line activation.

[0073] The RESET signal may further include a hardware-level global reset (H-RESET) signal and a partial reset (P-RESET) signal.

[0074] The H-RESET signal is used to force all GOA units into the initial state under abnormal conditions (such as unstable voltage).

[0075] The P-RESET signal resets a specific row or area, for example, adjusting the local scanning timing during dynamic refresh rate switching.

[0076] Figure 2 It is a schematic diagram of a pixel circuit provided by an embodiment of the present application.

[0077] Figure 2 The shown schematic diagram of the pixel circuit may be a schematic diagram of a pixel circuit composed of low temperature polycrystalline oxide (LTPO).

[0078] The pixel circuit 11 includes a first transistor 111, a second transistor 112, a third transistor 113, a fourth transistor 114, a fifth transistor 115, a sixth transistor 116, a seventh transistor 117, an eighth transistor 118, a storage capacitor 119, and a light-emitting unit 110. The light-emitting unit 110 may be an OLED, for example.

[0079] It should be noted that the control electrode of the transistor may be the gate of the transistor, and the first electrode and the second electrode of the transistor are the source and drain of the transistor, respectively.

[0080] The first electrode of the first transistor 111 is coupled to the first initialization voltage terminal Vinit1, the control electrode of the first transistor 111 is coupled to the P-RESET signal terminal, and the second electrode of the first transistor 111 is coupled to the second node N2.

[0081] The control electrode of the second transistor 112 is coupled to the GSTV signal terminal, the first electrode of the second transistor 112 is coupled to the third node N3, and the second electrode of the second transistor 112 is coupled to the second node N2.

[0082] The first electrode of the third transistor 113 is coupled to the first node N1, the second electrode of the third transistor 113 is coupled to the second node N2, the control electrode of the third transistor 113 is coupled to the third node N3, and a storage capacitor 119 is coupled between the second node N2 and the third node N3.

[0083] The first pole of the fourth transistor 114 is coupled to the data voltage terminal Vdata, the second pole of the fourth transistor 114 is coupled to the first node N1, and the control pole of the fourth transistor 114 is coupled to the NSTV signal terminal. The data signal input at the data voltage terminal Vdata is related to the refreshed screen data.

[0084] The first pole of the fifth transistor 115 is coupled to the first power supply voltage terminal ELVDD, the second pole of the fifth transistor 115 is coupled to the first node N1, and the control pole of the fifth transistor 115 is coupled to the ESTV signal terminal.

[0085] The first pole of the sixth transistor 116 is coupled to the second node N2, the second pole of the sixth transistor 116 is coupled to the fourth node, the control pole of the sixth transistor 116 is coupled to the ESTV signal terminal, the second pole of the sixth transistor 116 is also coupled to the light-emitting unit 110, and the light-emitting unit 110 is also coupled to the second power supply voltage terminal ELVSS.

[0086] The first pole of the seventh transistor 117 is coupled to the second initialization voltage terminal Vinit2, the second pole of the seventh transistor 117 is coupled to the fourth node, and the control pole of the seventh transistor 117 is coupled to the H-RESET signal terminal.

[0087] The first pole of the eighth transistor 118 is coupled to the third initialization voltage terminal Vinit3, the second pole of the eighth transistor 118 is coupled to the first node N1, and the control pole of the eighth transistor 118 is coupled to the H-RESET signal terminal.

[0088] By way of example and not limitation, the second transistor 112 may be an N-type transistor that conducts under the control of a high-level signal, and the first transistor 111, the third transistor 113, the fourth transistor 114, the fifth transistor 115, the sixth transistor 116, the seventh transistor 117, and the eighth transistor 118 may be P-type transistors, respectively.

[0089] Taking the LTPO pixel circuit 11 as an example, in the pixel circuit 11 driven by the GOA circuit, there are a refresh frame and a hold frame, and the loaded data of the refresh frame and the hold frame are different. Since the Vdata data needs to be written for displaying the refresh frame, during the display process of the refresh frame, the five GOA signals of ESTV, GSTV, NSTV, H-RESET, and P-RESET all work normally. However, in the hold frame state, no data needs to be written, and the two signals of GSTV and NSTV do not need to be turned on. In these two different frame display states, there may be a large difference in brightness, resulting in a situation where the display brightness amplitude fluctuates, thus causing a serious flicker problem. Since the brightness of each frame may be different, it may cause a fluctuation amplitude of the brightness when the pixel circuit 11 emits light, resulting in poor display effects. Each frame includes a process of lighting and extinguishing. Since the duration of lighting for each frame may be different, the brightness of the display panel 10 may change when displaying different frames. Since the display brightness is different between frames, a flicker phenomenon occurs.

[0090] Based on the above problems, there is an urgent need for a simple brightness adjustment scheme that can effectively alleviate the flicker problem.

[0091] To solve the above problems, the embodiments of the present application provide a brightness adjustment method and a display device 1 for the display device 1, which can effectively alleviate the flicker problem during the display process and improve the display effect of the display device 1.

[0092] Figure 3 It is a schematic diagram of the architecture of another display device 1 provided by the embodiments of the present application.

[0093] As Figure 3 shown, the display device 1 provided by the embodiments of the present application includes a display panel 10, an optical fingerprint sensor 30, and a display driving integrated circuit 20. The display panel 10 and the optical fingerprint sensor 30 are respectively electrically connected to the display driving integrated circuit 20.

[0094] The optical fingerprint sensor 30 is used to obtain the light emitted by the display panel 10 and send first brightness information to the display driving integrated circuit 20. The first brightness information includes the brightness characteristics of the light.

[0095] The display driving integrated circuit 20 is used to send a first adjustment signal to the display panel 10 according to the first brightness information. The first adjustment signal is used to adjust the display brightness of the display panel 10.

[0096] In some possible implementations, the display device further includes a control chip. The control chip is electrically connected to the optical fingerprint sensor and the display driving integrated circuit respectively. The control chip is configured to control the optical fingerprint sensor to acquire the light emitted by the display panel, and control the optical fingerprint sensor to send first brightness information to the display driving integrated circuit. The first brightness information includes the brightness characteristics of the light.

[0097] The control chip is further configured to control the display driving integrated circuit to receive the first brightness information, and control the display driving integrated circuit to send a first adjustment signal to the display panel. The first adjustment signal is used to adjust the display brightness of the display panel.

[0098] In some possible implementations, the first adjustment signal is specifically configured to adjust the brightness when the display panel 10 displays the second frame, and the second frame is the next frame after the display panel 10 displays the first frame.

[0099] Wherein, the display panel 10 may include a light-emitting front surface and a back surface opposite to the light-emitting front surface. The optical fingerprint sensor 30 is generally disposed on the back surface of the display panel 10. The light emitted by the display panel 10 can propagate through the back surface of the display panel 10 to the optical fingerprint sensor 30, so that the optical fingerprint sensor 30 can acquire the light emitted by the display panel 10.

[0100] The first brightness information may be a waveform information of a kind of light. The waveform information of the light can be regarded as a mixture of curves with different frequencies and different amplitudes. The frequency with a larger amplitude can indicate a higher brightness at that position, and it can be considered as a frequency that needs to be optimized, that is, the larger amplitude needs to be reduced to be closer to the target value. The first brightness information can also be regarded as a kind of brightness value.

[0101] In some possible implementations, the display panel 10 further includes a pixel circuit 11 and a driving circuit 12 which are electrically connected. The driving circuit 12 is configured to receive the first adjustment signal, and is further configured to send a first adjustment parameter to the pixel circuit 11 when receiving the first adjustment signal.

[0102] Wherein, the first adjustment parameter may include one or more of an ESTV signal parameter, a second initialization voltage value Vinit2 parameter, a driving voltage value ELVDD parameter, or a common terminal voltage ELVSS parameter.

[0103] It should be noted that the ESTV signal can change the duty cycle of light emission per unit time, so as to change the actual light emission time to adjust the brightness. For example, within the time of one frame, the wider the width of the ESTV signal, the longer the light emission time and the greater the brightness. The ESTV signal parameter may refer to the width of the ESTV signal.

[0104] The second initialization voltage value Vinit2 is the anode reset voltage of the pixel circuit 11, which can finely adjust the emission brightness. The larger the amplitude of Vinit2, the higher the brightness.

[0105] The drive voltage value ELVDD and the common terminal voltage ELVSS can also change the voltage magnitude in the pixel circuit 11, and can finely adjust the emission brightness.

[0106] In some possible implementation manners, the first adjustment parameter may include the ESTV signal parameter, and the emission brightness of the pixel circuit 11 is adjusted through the ESTV signal. Alternatively, the first adjustment parameter may also include the ESTV signal parameter and the second initialization voltage value Vinit2, and the emission brightness of the pixel circuit 11 is jointly adjusted through the ESTV signal and the second initialization voltage value Vinit2. Alternatively, the first adjustment parameter may also include the adjustment parameters of other signals sent by the drive circuit 12 to the pixel circuit 11.

[0107] In some possible implementation manners, the first brightness information includes the first fluctuation value F, and the first fluctuation value F is used to represent the brightness fluctuation amplitude when the display panel 10 displays the first frame.

[0108] In some possible implementation manners, the first fluctuation value F may satisfy the following formula:

[0109]

[0110] Wherein, the first maximum brightness value L max represents the maximum brightness value when the display panel 10 displays the first frame, and the first minimum brightness value L min represents the minimum brightness value when the display panel 10 displays the first frame.

[0111] The display driving integrated circuit 20 can further convert the first brightness information into the first fluctuation value F.

[0112] The lower the first fluctuation value F, the smaller the change amplitude of the brightness of the display panel 10 when displaying the first frame. In an ideal state, when the first fluctuation value is 0, it indicates that the brightness of the display panel 10 remains consistent when displaying the first frame.

[0113] In some possible implementation manners, the display driving integrated circuit 20 is further configured to determine a first difference, and determine a first adjustment signal according to the first difference, wherein the first difference is the difference between the first fluctuation value F and a target fluctuation value, and the target fluctuation value is a preset value.

[0114] In some possible implementation manners, the control chip is configured to control the display driving integrated circuit to determine the first difference, and determine the first adjustment signal according to the first difference.

[0115] Among them, the target fluctuation value can be a preset value. For example, the target fluctuation value can be 0.

[0116] The display driving integrated circuit 20 can adjust the first adjustment signal according to the first maximum brightness value L when the display panel 10 displays the first frame max and the first minimum brightness value L min to change the specific parameter value in the first adjustment parameter.

[0117] In some possible implementation manners, the display driving integrated circuit 20 is further configured to determine the first adjustment signal according to the first mapping relationship, and each mapping relationship in the first mapping relationship is used to indicate the corresponding relationship between a piece of first brightness information and a first adjustment signal.

[0118] The first mapping relationship can be constructed in the form of a table as a first mapping table, or these mapping relationships can be modeled and represented by a formula. A possible form of the first mapping relationship can be an index group, and a possible form of the first mapping table can also be a mapping set.

[0119] As an example, relationship information between multiple pieces of first brightness information and the first adjustment signal can be established, and the corresponding relationship can be characterized by means of the relationship information. When the first brightness information is obtained, the first adjustment signal corresponding to the first brightness information can be determined by looking up the relationship information. The relationship information can be determined by one or more methods such as experience, theoretical derivation, experiment, or simulation.

[0120] Exemplarily, the relationship between the multiple pieces of first brightness information and the multiple first adjustment signals can be modeled, and the corresponding relationship can be characterized by means of the model. When the first brightness information is obtained, the first brightness information is input into the model to obtain the corresponding first adjustment signal.

[0121] Exemplarily, the reference corresponding relationship can also be represented in other forms, such as converting the corresponding relationship into a visual relationship diagram, etc.

[0122] In some possible implementation manners, the first mapping relationship is stored in the display driving integrated circuit 20.

[0123] For example, during the aging test before leaving the factory after the display device 1 is assembled, different ESTV signals and voltage values are used to make the display panel 10 display images in different application scenarios. The optical fingerprint sensor 30 can record the first brightness information in different application scenarios during this process. The display driving integrated circuit 20 can determine different first adjustment signals according to different first brightness information to obtain a first mapping relationship, and store the first mapping relationship in the display driving integrated circuit 20, so that the display driving integrated circuit 20 can read the stored first mapping relationship.

[0124] In some possible implementation manners, the first mapping relationship can also be stored in the memory of the display device. The display driving integrated circuit 20 can read the first mapping relationship stored in the memory to adjust the display brightness of the display panel.

[0125] Since the first mapping relationship is preset in the display driving integrated circuit 20, during the subsequent operation of the display device 1, when switching different application scenarios, the information in the preset first mapping relationship can be called to avoid obvious changes in brightness.

[0126] In some possible implementation manners, the first mapping relationship can be updated in real time during the use of the display device 1. For example, during the use of the display device 1 by the user, the optical fingerprint sensor 30 continuously obtains the light emitted by the display panel 10, and sends the first brightness information to the display driving integrated circuit 20, and determines the corresponding first adjustment signal. The display driving integrated circuit 20 can form the first mapping relationship in real time with the first brightness information and the corresponding first adjustment signal during the use of the display device 1. During the subsequent use of the display device 1, the first mapping relationship can be retrieved for brightness adjustment.

[0127] Figure 4 The schematic diagram shows the corresponding relationship between the ESTV signal and the brightness curve of the pixel circuit 11.

[0128] The ESTV signal mainly adjusts the duty cycle, that is, changes the time ratio of actual light emission to adjust the brightness of the pixel circuit 11. The wider the width of the ESTV signal, the greater the brightness of light emission. The second initialization voltage Vinit2 is the anode reset voltage, which can finely adjust the light emission brightness. The greater the amplitude of the second initialization voltage Vinit2 (negative voltage), the higher the brightness.

[0129] When the ESTV signal is at a low level, the path of the pixel circuit 11 is turned on, and the light-emitting unit 110 starts to emit light. Among them, the first frame can be a refresh frame, and the second to fourth frames can be hold frames. Each frame can have three ESTV signals, and the widths of the three ESTV signals can be the same or different. In the figure, S1, S2, and S3 respectively refer to the areas enclosed by the brightness change curves caused by the three ESTV signals and the time axis, and the areas of S1, S2, and S3 need to be as close as possible. S1 represents the stage when the light just starts to turn on in this frame, S2 represents the stable stage, and S3 represents the end stage.

[0130] Among them, Figure 4 the first frame in Figure 4 can represent the first frame displayed on the display panel 10.

[0131] In the display state of the refresh frame, the areas of S1 and S2 can be adjusted by adjusting the width of the ESTV signal (i.e., Figure 4 A marked by the arrow in Figure 4 to make them as close as possible. The d in Figure 4 refers to the possible brightness difference value between the refresh frame and the hold frame. This is because the data loaded in the refresh frame and the hold frame is different. That is, in the display state of the refresh frame, Vdata data needs to be written, and the five GOA signals of ESTV, GSTV, NSTV, H-RESET, and P-RESET all work normally; while in the display state of the hold frame, Vdata data does not need to be written, and GSTV and NSTV do not need to be turned on. Therefore, before brightness adjustment, the brightness of the hold frame is usually lower than that of the refresh frame. In the display state of the hold frame, the brightness of the light emission in the display state of the hold frame can be increased by adjusting the width of the ESTV signal (i.e.,

[0132] B marked by the arrow in

[0133] so as to reduce the brightness difference between the refresh frame and the hold frame and reduce the probability of the occurrence of the flicker problem.

[0134] In some possible implementation manners, the display driving integrated circuit 20 and the optical fingerprint sensor 30 are integrally designed in the display device 1. The display driving integrated circuit 20 can be integrated with the optical fingerprint sensor 30. The display driving integrated circuit 20 can determine first brightness information based on the light emitted by the display panel 10 acquired by the optical fingerprint sensor 30, and then determine a first adjustment signal according to the first brightness information. That is to say, after the optical fingerprint sensor 30 acquires the light emitted by the display panel 10, the display driving integrated circuit 20 can obtain the first brightness information through the optical fingerprint sensor 30, and it is not necessary for the optical fingerprint sensor 30 to send the first brightness information to the display driving integrated circuit 20.

[0135] The embodiment of the present application further provides a method for adjusting the brightness of a display device.

[0136] Figure 5 It is a schematic flowchart of a method 500 for adjusting the brightness of a display device provided by the embodiment of the present application.

[0137] The display device includes a display panel, an optical fingerprint sensor, and a display driving integrated circuit. The display panel and the optical fingerprint sensor are respectively electrically connected to the display driving integrated circuit. The method 500 may include the following steps:

[0138] S510. Acquire the light emitted by the display panel, and send first brightness information, where the first brightness information includes the brightness characteristics of the light.

[0139] Among them, acquiring the light of the display panel may be acquired by the optical fingerprint sensor. The optical fingerprint sensor sends the first brightness information to the display driving integrated circuit.

[0140] S520. Receive the first brightness information, and send a first adjustment signal to the display panel, where the first adjustment signal is used to adjust the display brightness of the display panel.

[0141] Among them, the display driving integrated circuit may receive the first brightness information and send a first adjustment signal to the display panel according to the first brightness information.

[0142] In some possible implementation manners, the first adjustment signal is specifically used to adjust the brightness when the display panel displays the second frame, and the second frame is the next frame after the display panel displays the first frame.

[0143] In some possible implementation manners, the first brightness information includes a first fluctuation value F, and the first fluctuation value F is used to represent the brightness fluctuation amplitude when the display panel displays the first frame.

[0144] In some possible implementations, the method further includes: the display driving integrated circuit determines a first difference, and determines a first adjustment signal according to the first difference, where the first difference is the difference between a first fluctuation value F and a target fluctuation value, and the target fluctuation value is a preset value.

[0145] In some possible implementations, the method further includes: the driving circuit receives the first adjustment signal, and when the driving circuit receives the first adjustment signal, it sends a first adjustment parameter to the pixel circuit, where the display panel includes a pixel circuit and a driving circuit that are electrically connected.

[0146] In some possible implementations, the first adjustment parameter includes one or more of an ESTV signal parameter, a second initialization voltage value Vinit2 parameter, a driving voltage value ELVDD parameter, or a common terminal voltage ELVSS parameter.

[0147] In some possible implementations, the display driving integrated circuit determines the first adjustment signal according to a first mapping relationship, and each mapping relationship in the first mapping relationship is used to indicate the corresponding relationship between a first brightness information and a first adjustment signal.

[0148] In some possible implementations, the first mapping relationship is stored in the display driving integrated circuit.

[0149] The steps in the method 500 provided by the embodiments of the present application can refer to the description of the display device above. For the sake of brevity, they will not be repeated here.

[0150] The embodiments of the present application further provide a display device, which includes: a display panel, an optical fingerprint sensor, and a display driving integrated circuit. The display panel and the optical fingerprint sensor are respectively electrically connected to the display driving integrated circuit to implement any one of the brightness adjustment methods described in the embodiments of the present application.

[0151] The embodiments of the present application further provide a readable storage medium, on which a program is stored. When the program is executed by a processor, the processor is enabled to implement any one of the brightness adjustment methods described in the embodiments of the present application.

[0152] The embodiments of the present application further provide a program product. When the program product runs on a display device, the display device is enabled to implement any one of the brightness adjustment methods described in the embodiments of the present application.

[0153] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Skilled professionals can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0154] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0155] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0156] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0157] In addition, the functional units in each embodiment of this application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0158] When the above-mentioned functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art or a part of this technical solution can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. The foregoing storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs.

[0159] As described above, the foregoing are only specific implementation manners of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of changes or substitutions, which should all be covered by the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

1. A method for adjusting the brightness of a display device, characterized in that, The display device includes a display panel, an optical fingerprint sensor, and a display driving integrated circuit. The display panel and the optical fingerprint sensor are electrically connected to the display driving integrated circuit respectively. The method includes: The optical fingerprint sensor acquires the light emitted by the display panel and sends first brightness information to the display driving integrated circuit. The first brightness information includes the brightness characteristics of the light. The display driving integrated circuit sends a first adjustment signal to the display panel according to the first brightness information. The first adjustment signal is used to adjust the display brightness of the display panel.

2. The method according to claim 1, wherein: The first adjustment signal is specifically used to adjust the brightness when the display panel displays a second frame, and the second frame is the next frame after the display panel displays a first frame.

3. The method according to claim 2, wherein: The first brightness information includes a first fluctuation value F, and the first fluctuation value F is used to represent the brightness fluctuation amplitude when the display panel displays the first frame.

4. The method according to claim 3, wherein The method further includes: The display driving integrated circuit determines a first difference and determines the first adjustment signal according to the first difference. The first difference is the difference between the first fluctuation value F and a target fluctuation value, and the target fluctuation value is a preset value.

5. The method according to any one of claims 1-4, characterized in that, The display panel includes a pixel circuit and a driving circuit connected electrically. The method further includes: When the driving circuit receives the first adjustment signal, the driving circuit sends a first adjustment parameter to the pixel circuit according to the first adjustment signal. The first adjustment parameter includes one or more of an ESTV signal parameter, a second initialization voltage value Vinit2 parameter, a driving voltage value ELVDD parameter, or a common terminal voltage ELVSS parameter.

6. The method according to any one of claims 1-5, characterized in that, The method further includes: The display driving integrated circuit determines the first adjustment signal according to a first mapping relationship. Each mapping relationship in the first mapping relationship is used to indicate the corresponding relationship between a piece of the first brightness information and a first adjustment signal.

7. The method according to claim 6, wherein: The first mapping relationship is stored in the display driving integrated circuit.

8. A display device, characterized in that, The display device includes: a display panel, an optical fingerprint sensor, and a display driving integrated circuit. The display panel and the optical fingerprint sensor are electrically connected to the display driving integrated circuit respectively to implement the brightness adjustment method according to any one of claims 1 to 7.

9. A readable storage medium, characterized in that, A program is stored thereon. When the program is executed by a processor, the processor implements the brightness adjustment method according to any one of claims 1 to 7.

10. A program product, characterized in that, When the program product runs on the display device, the display device implements the brightness adjustment method according to any one of claims 1 to 7.

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