Method, display panel, device, processing equipment and terminal for adjusting fingerprint brightness

Abstract

The present application provides a method, display panel, device, processing equipment and terminal for adjusting fingerprint brightness, which obtains the actual brightness of the fingerprint spot when the screen is in the target mode, calculates the difference between the actual brightness and the target brightness, and uses the difference to compensate the target brightness to obtain the compensated brightness. According to the pre-established correspondence between the brightness and grayscale of the fingerprint spot area in the reference mode, the reference brightness corresponding to the compensated brightness and the reference grayscale corresponding to the reference brightness are obtained, and the reference grayscale is used as the target grayscale of the fingerprint spot, so that the brightness of the fingerprint spot is within the target brightness range. In this way, the reference grayscale is used as the target grayscale of the fingerprint spot, and the brightness of the initial grayscale of the fingerprint spot in the reference mode is converted to the compensated brightness. The compensated brightness is greater than the target brightness. Then, when the screen is in the target mode, the actual brightness of the fingerprint spot can be within the target brightness range and approach the target brightness, thereby achieving the purpose of unlocking.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a method for adjusting fingerprint brightness, a display panel, a device, a processing equipment and a terminal. Background Art

[0002] With the rapid development of science and technology, the requirements for mobile phone performance are constantly increasing. In order to improve the security of mobile terminals, fingerprint unlocking is used to unlock mobile terminals.

[0003] In order to increase the screen-to-body ratio, fingerprint unlocking can use light-sensing unlocking. Light-sensing unlocking means that when the finger touches the screen, the light emitted by the OLED (Organic Light-Emitting Diode) screen penetrates the cover to illuminate the fingerprint texture, and the light reflected by the fingerprint penetrates the screen and returns to the light sensor. The light sensor converts the optical signal into an electrical signal and transmits it to the processor of the mobile terminal. The processor converts the electrical signal into a digital signal for comparison with the fingerprint information, thereby completing the light-sensing unlocking.

[0004] At present, in order to save screen power consumption, the OLED screen of the mobile terminal sets different cathode (ELVSS) voltage, erase (VREFN) voltage or state (VGSP) voltage at different brightness (Digital Brightness Value, DBV). However, the change of ELVSS voltage, VREFN voltage or VGSP voltage may cause the brightness of the fingerprint spot to fail to meet the fingerprint unlocking requirements. Summary of the invention

[0005] The present application provides a method, display panel, device, processing equipment and terminal for adjusting fingerprint brightness, so as to adjust the brightness of the fingerprint spot so that the brightness of the fingerprint spot meets the requirements of fingerprint unlocking.

[0006] In a first aspect, the present application provides a method for adjusting fingerprint brightness, comprising:

[0007] The actual brightness of the fingerprint spot when the screen is in the target mode is obtained, the difference between the actual brightness and the target brightness is calculated, and the target brightness is compensated by the difference to obtain the compensated brightness. The actual brightness is the fingerprint spot brightness of the fingerprint spot area at the initial grayscale in the reference mode, and the target brightness is the reference fingerprint spot brightness required for fingerprint unlocking;

[0008] Obtaining a reference brightness corresponding to the compensation brightness and a reference grayscale corresponding to the reference brightness according to a pre-established correspondence between the fingerprint spot brightness and the grayscale of the fingerprint spot area in the reference mode;

[0009] The reference grayscale is used as the target grayscale of the fingerprint light spot, so that the brightness of the fingerprint light spot is within a target brightness range, and the target brightness range is the fingerprint light spot brightness range required for fingerprint unlocking.

[0010] In some embodiments, the fingerprint spot brightness in the reference mode is greater than or equal to the fingerprint spot brightness in the target mode.

[0011] In some embodiments, compensating the target brightness by using the difference to obtain compensated brightness specifically includes:

[0012] The difference value and the target brightness are added, and the added brightness is used as the compensation brightness.

[0013] In some embodiments, obtaining the reference brightness corresponding to the compensation brightness and the reference grayscale corresponding to the reference brightness according to the pre-established correspondence between the fingerprint spot brightness and the grayscale in the reference mode specifically includes:

[0014] Finding a reference brightness that has the smallest difference from the compensation brightness in the pre-established correspondence between the brightness of the fingerprint spot and the grayscale in the reference mode of the fingerprint spot area;

[0015] A reference gray scale corresponding to the reference brightness is obtained.

[0016] In some embodiments, before obtaining the target grayscale corresponding to the compensation brightness according to the pre-established correspondence between the fingerprint spot brightness and the grayscale of the fingerprint spot area in the reference mode, the method further includes:

[0017] Establishing the corresponding relationship between the brightness and gray scale of the fingerprint spot area in the reference mode;

[0018] Preferably, the maximum fingerprint spot brightness in the corresponding relationship is greater than the compensation brightness.

[0019] In some embodiments, establishing the correspondence between the brightness of the fingerprint spot and the grayscale of the fingerprint spot area in the reference mode specifically includes:

[0020] The gamma voltage of the fingerprint spot area when it is in the reference mode is adjusted, and the grayscale and fingerprint spot brightness corresponding to each gamma voltage are obtained to establish a corresponding relationship between the grayscale and the fingerprint spot brightness.

[0021] In some embodiments, adjusting the gamma voltage of the fingerprint spot area to obtain the grayscale and fingerprint spot brightness corresponding to each gamma voltage specifically includes:

[0022] Obtaining a gamma voltage when the fingerprint spot area is in a reference mode, adjusting the gamma voltage in the reference mode according to a preset interval, and obtaining a grayscale and fingerprint spot brightness corresponding to each gamma voltage;

[0023] Preferably, the gamma voltage in the reference mode is adjusted according to a preset interval, and the grayscale and fingerprint spot brightness corresponding to each gamma voltage are obtained until the fingerprint spot brightness corresponding to the gamma voltage is greater than the compensation brightness.

[0024] In a second aspect, the present application provides a display panel including a fingerprint spot area, and the brightness of the fingerprint spot area is adjusted using the method in the first aspect and any possible design of the first aspect.

[0025] In a third aspect, the present application provides a device for adjusting fingerprint brightness, comprising:

[0026] The first acquisition module is used to acquire the actual brightness of the fingerprint spot when the screen is in the target mode, calculate the difference between the actual brightness and the target brightness, and use the difference to compensate the target brightness to obtain the compensated brightness. The actual brightness is the fingerprint spot brightness at the initial grayscale when the fingerprint spot area is converted to the reference mode, and the target brightness is the reference fingerprint spot brightness required for fingerprint unlocking;

[0027] A second acquisition module, used for acquiring a reference brightness corresponding to the compensation brightness and a reference grayscale corresponding to the reference brightness according to a pre-established correspondence between the fingerprint spot brightness and the grayscale of the fingerprint spot area in the reference mode;

[0028] The adjustment module is used to use the reference grayscale as the target grayscale of the fingerprint light spot so that the brightness of the fingerprint light spot is within a target brightness range, and the target brightness range is the fingerprint light spot brightness range required for fingerprint unlocking.

[0029] In a fourth aspect, the present application provides a processing device, a processor, and a memory communicatively connected to the processor;

[0030] The memory is used to store instructions; the processor is used to call the instructions in the memory to execute the method for adjusting fingerprint brightness in the first aspect and any possible design of the first aspect.

[0031] In a fifth aspect, the present application provides a terminal, comprising the display panel of the second aspect and the processing device of the fourth aspect.

[0032] The method for adjusting fingerprint brightness provided in the present application obtains the actual brightness of the fingerprint spot when the screen is in the target mode, calculates the difference between the actual brightness and the target brightness, and uses the difference to compensate the target brightness to obtain the compensated brightness. According to the correspondence between the brightness and grayscale of the fingerprint spot area in the reference mode established in advance, the reference brightness corresponding to the compensated brightness and the reference grayscale corresponding to the reference brightness are obtained, and the reference grayscale is used as the target grayscale of the fingerprint spot, so that the brightness of the fingerprint spot is within the target brightness range. In this way, using the reference grayscale as the target grayscale of the fingerprint spot, when the screen is in the reference mode, the brightness corresponding to the fingerprint spot at the initial grayscale is converted to the compensated brightness, and when the screen is in the target mode, the compensated brightness changes, so that the actual brightness of the fingerprint spot can be within the target brightness range and approach the target brightness, thereby achieving the purpose of unlocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A flowchart of a method for adjusting fingerprint brightness provided in one embodiment of the present application;

[0035] Figure 2 A schematic diagram of a fingerprint spot brightness curve provided in an embodiment of the present application;

[0036] Figure 3 A schematic diagram of the structure of a device for adjusting fingerprint brightness provided in one embodiment of the present application;

[0037] Figure 4 A schematic diagram of the structure of a processing device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] Currently, most fingerprint unlocking methods use light sensing unlocking, which has high requirements for brightness. Under different screen brightness under different unlocking screen backgrounds, the brightness of the fingerprint spot needs to meet certain requirements to complete the unlocking. For example, the brightness of the fingerprint spot should be close to 800nit to complete the unlocking.

[0040] In order to save screen power consumption, it is necessary to set dynamic ELVSS voltage, dynamic VREFN voltage and dynamic VGSP voltage, that is, different ELVSS voltage, VREFN voltage and VGSP voltage are set under different screen brightness. ELVSS voltage refers to the cathode voltage of the screen, that is, the cathode voltage of the light source, and VREFN voltage refers to the erasing voltage of the screen. For example, when the brightness bar of the screen is a high brightness bar (51), the ELVSS voltage uses a negative bias with a larger absolute value, the VREFN voltage uses a negative bias with a larger absolute value, and the VGSP voltage uses a smaller positive bias. When the brightness bar of the screen is a medium and low brightness bar (51), the ELVSS voltage uses a negative bias with a smaller absolute value, the VREFN voltage uses a negative bias with a smaller absolute value, and the VGSP voltage uses a larger positive bias. Different brightness bars have corresponding brightness (DBV), and the high brightness bar is, for example, a brightness of more than 600nit, and the medium and low brightness bar is, for example, a brightness of less than 600nit.

[0041] When fingerprint unlocking, it is generally based on the reference mode, and the reference mode is the fingerprint spot brightness under the initial grayscale when the high brightness mode (High Brightness Mode, HBM) is unlocked. The initial grayscale is, for example, 255 grayscale (gray), and the target brightness is the initial brightness corresponding to the initial grayscale when the initial voltage does not change. When the brightness of the screen changes, at least one dynamic voltage among the ELVSS voltage, VREFN voltage and VGSP voltage will change, so that the brightness of the fingerprint spot changes accordingly and cannot approach the target brightness, that is, the initial voltage changes, and the brightness corresponding to the initial grayscale changes, and cannot approach the target brightness. When the mode of the screen is converted, the brightness of the fingerprint spot area will change; for example, when the screen is converted from the reference mode to the normal mode (Normal), the screen brightness dims, and at least one dynamic voltage among the ELVSS voltage, VREFN voltage and VGSP voltage will change, and the brightness of the fingerprint spot area is affected by the ELVSS voltage, VREFN voltage and / or VGSP voltage and changes. When the screen is in normal mode, the brightness corresponding to the initial grayscale of the fingerprint spot is lower than the target brightness and has a large difference from the target brightness, which cannot reach the fingerprint spot brightness required for fingerprint unlocking, resulting in fingerprint unlocking failure. For example, when the screen is converted from normal mode to reference mode, the screen brightness becomes brighter, and the brightness of the fingerprint spot changes due to the influence of ELVSS voltage, VREFN voltage and / VGSP voltage. When the screen is in reference mode, the brightness corresponding to the initial grayscale of the fingerprint spot can reach the fingerprint spot brightness required for fingerprint unlocking, thereby achieving fingerprint unlocking.

[0042] The applicant considers that when the screen is in the target mode, the brightness of the fingerprint spot is dimmed due to the influence of the ELVSS voltage, the VREFN voltage and / or the VGSP voltage, and thus may not be able to achieve the fingerprint spot brightness required for fingerprint unlocking.

[0043] In order to solve the above problems, the present application proposes a method for adjusting fingerprint brightness, taking into account the difference between the actual brightness and the target brightness when the screen is in target mode, obtaining the actual brightness of the fingerprint spot when the screen is in target mode, calculating the difference between the actual brightness and the target brightness, and using the difference to compensate the target brightness to obtain the compensated brightness, the actual brightness is the fingerprint spot brightness under the initial grayscale in the reference mode (HBM), and the target brightness is the reference fingerprint spot brightness required for fingerprint unlocking. According to the pre-established correspondence between the fingerprint spot brightness and the grayscale of the fingerprint spot area in the reference mode, the reference brightness corresponding to the compensated brightness and the reference grayscale corresponding to the reference brightness are obtained, and the reference grayscale is used as the target grayscale of the fingerprint spot, so that the brightness of the fingerprint spot is within the target brightness range, and the target brightness range is the actual fingerprint spot brightness range required for fingerprint unlocking. In this way, the reference grayscale is used as the target grayscale of the fingerprint spot. When the screen is in the reference mode, the brightness of the fingerprint spot at the initial grayscale is converted to the compensation brightness. When the screen is in the target mode, the compensation brightness changes, so that the actual brightness of the fingerprint spot can be within the target brightness range and approach the target brightness, thereby achieving the purpose of unlocking. Generally, the brightness of the fingerprint spot in the reference mode is greater than that in the target mode; when the target mode is the reference mode, the brightness of the fingerprint spots of the two are equal or close.

[0044] The following specific embodiments are used to describe the technical solution of the application in detail. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0045] Figure 1 A flow chart of a method for adjusting fingerprint brightness provided by an embodiment of the present application is shown.

[0046] like Figure 1 As shown, the method of this embodiment may include the following steps:

[0047] S01. Acquire the actual brightness of the fingerprint spot when the screen is in the target mode, calculate the difference between the actual brightness and the target brightness, and use the difference to compensate the target brightness to obtain the compensated brightness.

[0048] When the screen is in the reference mode, the fingerprint spot has a corresponding brightness at the initial grayscale. Generally, the screen is unlocked based on this brightness. The actual brightness is the brightness of the fingerprint spot at the initial grayscale in the reference mode (HBM). The target brightness is the reference fingerprint spot brightness required for fingerprint spot unlocking. It can be understood that in this reference mode, when the initial voltage does not change, the brightness corresponding to the initial grayscale, the fingerprint unlocking can be achieved when the brightness approaches the target brightness. However, when the screen mode changes, its initial voltage will change, then the actual brightness will change and differ greatly from the target brightness. For example, when the reference mode is converted to the normal mode, the actual brightness changes, then the actual brightness when the screen is in the normal mode deviates from the target brightness. When the actual brightness is lower than the target brightness and the actual brightness differs greatly from the target brightness, the brightness required for fingerprint unlocking cannot be reached, and fingerprint unlocking cannot be achieved.

[0049] In some embodiments, when the screen switches between different modes, the ELVSS voltage, VREFN voltage and / or VGSP voltage changes, causing the actual brightness of the fingerprint spot to change. When the screen is in the reference mode, the brightness of the fingerprint spot corresponding to the initial grayscale changes. When the screen is in the target mode, the actual brightness of the fingerprint spot at the initial grayscale is lower than the target brightness.

[0050] The target mode can be any mode in the normal mode (Normal). As shown in Table 1, the normal modes include Normal1, Normal2, Normal3, Normal4, Normal5, Normal6, Normal7, Normal8 and Normal9. The actual brightness of the fingerprint spot is obtained when the screen is in the target mode. The actual brightness of the fingerprint spot is 750nit in Normal1 mode, 700nit in Normal2 mode, 650nit in Normal3 mode, 650nit in Normal4 mode, 650nit in Normal5 mode, 650nit in Normal6 mode, 650nit in Normal7 mode, 650nit in Normal8 mode, and 650nit in Normal9 mode.

[0051] Table 1

[0052]

[0053] In some embodiments, after calculating the difference between the actual brightness and the target brightness, the difference and the target brightness can be added, and the added brightness is used as the compensation brightness, and the compensation brightness takes the difference between the actual brightness and the target brightness into account. Referring to Table 1, when the target mode is the reference mode, the digital brightness value of the screen is 0FFF, the corresponding ELVSS voltage is -4V, the VREFN voltage is -3.2V, the VGSP voltage is 2V, the target brightness of the fingerprint spot is 800nit, and the actual brightness of the fingerprint spot at the initial grayscale is 800nit. The actual brightness of the fingerprint spot at the initial grayscale is consistent with the target brightness, and can achieve the brightness required for fingerprint unlocking.

[0054] When the target mode is Normal1 mode, the digital brightness value of the screen is 0D76, and the corresponding ELVSS voltage is -3.5V, VREFN voltage is -3.1V, and VGSP voltage is 2.2V. Since the ELVSS voltage, VREFN voltage, and VGSP voltage change when the screen mode changes, the brightness of the fingerprint spot changes. When the screen is in Normal1, the actual brightness of the fingerprint spot at the initial grayscale is 750nit. The difference between the actual brightness and the target brightness is calculated to be 50nit. The difference is used to compensate the target brightness to obtain a compensated brightness of 850nit.

[0055] When the target mode is Normal2 mode, the digital brightness value of the screen is 0A14, and the corresponding ELVSS voltage is -3V, VREFN voltage is -3V, and VGSP voltage is 2.5V. When the screen is in Normal2 mode, the actual brightness of the fingerprint spot is 700nit at the initial grayscale. The difference between the actual brightness and the target brightness is calculated to be 100nit. The target brightness is compensated by the difference to obtain a compensated brightness of 900nit.

[0056] When the target mode is Normal3, the digital brightness value of the screen is 0608, and the corresponding ELVSS voltage is -2.5V, VREFN voltage is -2.9V, and VGSP voltage is 2.5V. When the screen is in Normal3, the actual brightness of the fingerprint spot is 650nit at the initial grayscale. The difference between the actual brightness and the target brightness is 150nit. The target brightness is compensated by the difference to obtain a compensated brightness of 950nit.

[0057] When the target mode is Normal4 mode, the digital brightness value of the screen is 05A9, and the corresponding ELVSS voltage is -2.5V, VREFN voltage is -2.9V, and VGSP voltage is 2.5V. When the screen is in Normal4 mode, the actual brightness of the fingerprint spot is 650nit at the initial grayscale. The difference between the actual brightness and the target brightness is 150nit. The difference is used to compensate the target brightness to obtain a compensated brightness of 950nit.

[0058] When the target mode is Normal5 mode, the digital brightness value of the screen is 0507, and the corresponding ELVSS voltage is -2.5V, VREFN voltage is -2.8V, and VGSP voltage is 2.5V. When the screen is in Normal5 mode, the actual brightness of the fingerprint spot is 650nit at the initial grayscale. The difference between the actual brightness and the target brightness is calculated to be 150nit. The target brightness is compensated by the difference to obtain a compensated brightness of 950nit.

[0059] When the target mode is Normal6 mode, the digital brightness value of the screen is 031D, and the corresponding ELVSS voltage is -2.5V, VREFN voltage is -2.8V, and VGSP voltage is 2.5V. When the screen is in Normal6 mode, the actual brightness of the fingerprint spot is 650nit at the initial grayscale. The difference between the actual brightness and the target brightness is 150nit. The difference is used to compensate the target brightness to obtain a compensated brightness of 950nit.

[0060] When the target mode is Normal7 mode, the digital brightness value of the screen is 020C, and the corresponding ELVSS voltage is -2.5V, VREFN voltage is -2.8V, and VGSP voltage is 2.5V. When the screen is in Normal7 mode, the actual brightness of the fingerprint spot is 650nit at the initial grayscale. The difference between the actual brightness and the target brightness is 150nit. The difference is used to compensate the target brightness to obtain a compensated brightness of 950nit.

[0061] When the target mode is Normal8 mode, the digital brightness value of the screen is 00BD, and the corresponding ELVSS voltage is -2.5V, VREFN voltage is -2.8V, and VGSP voltage is 2.5V. When the screen is in Normal8 mode, the actual brightness of the fingerprint spot is 650nit at the initial grayscale. The difference between the actual brightness and the target brightness is 150nit. The difference is used to compensate the target brightness to obtain a compensated brightness of 950nit.

[0062] When the target mode is Normal9 mode, the digital brightness value of the screen is 0001, and the corresponding ELVSS voltage is -2.5V, VREFN voltage is -2.8V, and VGSP voltage is 2.5V. When the screen is in Normal9 mode, the actual brightness of the fingerprint spot is 650nit at the initial grayscale. The difference between the actual brightness and the target brightness is 150nit. The target brightness is compensated by the difference to obtain a compensated brightness of 950nit.

[0063] S02. Obtain a reference brightness corresponding to the compensation brightness and a reference grayscale corresponding to the reference brightness according to a pre-established correspondence between the fingerprint spot brightness and the grayscale of the fingerprint spot area in the reference mode.

[0064] The corresponding relationship between the brightness and grayscale of the fingerprint spot area in the reference mode is established in advance, and the corresponding relationship between the brightness and grayscale of the fingerprint spot is stored in the driver chip (DDIC). After obtaining the compensation brightness, the reference brightness corresponding to the compensation brightness and the reference grayscale corresponding to the reference brightness can be obtained according to the corresponding relationship between the brightness and grayscale of the fingerprint spot area in the reference mode established in advance. Preferably, the maximum fingerprint spot brightness in the corresponding relationship between the brightness and grayscale of the fingerprint spot is greater than the compensation brightness, so as to ensure that the reference brightness corresponding to the compensation brightness can be found in the corresponding relationship between the brightness and grayscale of the fingerprint spot, and the brightness of the maximum fingerprint spot can be adjusted according to the performance of the actual device, so as to save power consumption and ensure that the reference brightness corresponding to the compensation brightness can be obtained. It should be noted that the fingerprint spot area under the background of an unlocking screen can be in different modes, and the fingerprint spot area under the background of an unlocking screen can have different fingerprint spot brightnesses, and each fingerprint spot area under the background of an unlocking screen can be in different modes, so the corresponding relationship between the brightness and grayscale of the fingerprint spot area under the background of different unlocking screens can be established in advance.

[0065] In some embodiments, when the fingerprint spot area is in the reference mode, the corresponding relationship between the fingerprint spot brightness and the grayscale is established by adjusting the gamma voltage of the fingerprint spot area. For example, when the screen is in an unlocking screen background and the fingerprint spot area is in the reference mode, the gamma voltage of the fingerprint spot area is adjusted to establish the corresponding relationship between the fingerprint spot brightness and the grayscale when the fingerprint spot area is in the reference mode under the unlocking screen background.

[0066] As an implementation method, the gamma voltage of the fingerprint spot area is adjusted according to a preset interval, multiple gamma voltages are obtained, and a set of grayscale and fingerprint spot brightness corresponding to each gamma voltage is obtained. Then, multiple sets of grayscale and fingerprint spot brightness can be obtained, thereby establishing a corresponding relationship between the fingerprint spot brightness and the grayscale. The preset interval can be determined according to the specific situation. For example, the preset interval is 2, which is not limited here.

[0067] The gamma voltage when the screen is in the reference mode can be obtained, and the gamma voltage in the reference mode is used as a reference, and the gamma voltage in the reference mode is adjusted according to a preset interval to obtain multiple gamma voltages, and a corresponding relationship between a set of grayscales and fingerprint spot brightness corresponding to each gamma voltage is obtained, thereby obtaining multiple sets of grayscales and fingerprint spot brightness, thereby establishing a corresponding relationship between fingerprint spot brightness and grayscale. As an implementation method, the gamma voltage can be stopped from being adjusted when the fingerprint spot brightness corresponding to a certain gamma voltage is greater than the compensation brightness. As another implementation method, after the brightness of the fingerprint spot is greater than the compensation brightness, the gamma voltage can be continued to be adjusted until the brightness of the fingerprint spot is much greater than the compensation brightness, which can be determined according to the specific situation and is not limited here.

[0068] The reference brightness corresponding to the compensation brightness and the reference grayscale corresponding to the reference brightness are searched in the pre-established correspondence between the fingerprint spot brightness and the grayscale in the reference mode of the fingerprint spot area. In some embodiments, the reference brightness whose difference with the compensation brightness is within a threshold value can be searched in the pre-established correspondence between the fingerprint spot brightness and the grayscale in the reference mode of the fingerprint spot area. The purpose of fingerprint unlocking can be achieved at this reference brightness. The threshold value is, for example, 3% of the target brightness. As an implementation method, selecting the brightness with the smallest difference from the compensation brightness as the reference brightness in the correspondence can reduce power consumption loss, increase the service life of the device, and avoid overexposure problems.

[0069] As shown in Table 1, when the screen is in Normal1 mode, the compensation brightness is 850nit. In the corresponding relationship between the fingerprint spot brightness and the grayscale, the reference brightness with the smallest difference from the compensation brightness is 851.25nit, and the grayscale corresponding to 851.25nit is 237. When the screen is in Normal2 mode, the compensation brightness is 900nit. In the corresponding relationship between the fingerprint spot brightness and the grayscale, the reference brightness with the smallest difference from the compensation brightness is 899.38nit, and the grayscale corresponding to 899.38nit is 243. When the screen is in Normal3 mode, the compensation brightness is 950nit. In the corresponding relationship between the fingerprint spot brightness and the grayscale, the reference brightness with the smallest difference from the compensation brightness is 948.96nit, and the grayscale corresponding to 948.96nit is 249. When the screen is in Normal4 mode, the compensation brightness is 950nit. In the correspondence between the fingerprint spot brightness and the grayscale, the reference brightness with the smallest difference from the compensation brightness is 948.96nit, and the grayscale corresponding to 948.96nit is 249. When the screen is in Normal5 mode, the compensation brightness is 950nit. In the correspondence between the fingerprint spot brightness and the grayscale, the reference brightness with the smallest difference from the compensation brightness is 948.96nit, and the grayscale corresponding to 948.96nit is 249. When the screen is in Normal6 mode, the compensation brightness is 950nit. In the correspondence between the fingerprint spot brightness and the grayscale, the reference brightness with the smallest difference from the compensation brightness is 948.96nit, and the grayscale corresponding to 948.96nit is 249. When the screen is in Normal7 mode, the compensation brightness is 950nit. In the correspondence between the fingerprint spot brightness and the grayscale, the reference brightness with the smallest difference from the compensation brightness is 948.96nit, and the grayscale corresponding to 948.96nit is 249. When the screen is in Normal8 mode, the compensation brightness is 950nit. In the correspondence between the fingerprint spot brightness and the grayscale, the reference brightness with the smallest difference from the compensation brightness is 948.96nit, and the grayscale corresponding to 948.96nit is 249. When the screen is in Normal9 mode, the compensation brightness is 950nit. In the correspondence between the fingerprint spot brightness and the grayscale, the reference brightness with the smallest difference from the compensation brightness is 948.96nit, and the grayscale corresponding to 948.96nit is 249.

[0070] S103: Using the reference grayscale as the target grayscale of the fingerprint light spot, so that the brightness of the fingerprint light spot is within the target brightness range.

[0071] The reference grayscale is used as the target grayscale of the fingerprint spot. Since the target grayscale corresponds to the reference brightness, and the reference brightness is close to the compensation brightness, when the screen is in target mode, the compensation brightness changes, but it can still be within the target brightness range, thereby achieving the purpose of unlocking. The target brightness range is the range of brightness required to achieve fingerprint unlocking. Within this range, fingerprint unlocking can be achieved, and the target brightness is within the target brightness range. For example, the target brightness can be 800nit, and the target brightness range can be 795nit~805nit.

[0072] like Figure 2 As shown, when the target mode is Normal1, the gamma voltage corresponding to the fingerprint spot is adjusted to Gamma1, and Gamma1 corresponds to grayscale 249, so that the brightness of the fingerprint spot can be within the target brightness range at grayscale 249. When the target mode is Normal2, the gamma voltage corresponding to the fingerprint spot is adjusted to Gamma2, and Gamma2 corresponds to grayscale 249, so that the brightness of the fingerprint spot can be within the target brightness range at grayscale 249. When the target mode is Normal3, the gamma voltage corresponding to the fingerprint spot is adjusted to Gamma3, and Gamma3 corresponds to grayscale 249, so that the brightness of the fingerprint spot can be within the target brightness range at grayscale 249. When the target mode is Normal4, the gamma voltage corresponding to the fingerprint spot is adjusted to Gamma4, and Gamma4 corresponds to grayscale 249, so that the fingerprint spot can be within the target brightness range at grayscale 249. When the target mode is Normal5, the gamma voltage corresponding to the fingerprint spot is adjusted to Gamma5, and Gamma5 corresponds to grayscale 249, so that the fingerprint spot can be within the target brightness range at grayscale 249. When the target mode is Normal6, the gamma voltage corresponding to the fingerprint spot is adjusted to Gamma6, and Gamma6 corresponds to grayscale 249, so that the fingerprint spot can be within the target brightness range at grayscale 249. When the target mode is Normal7, the gamma voltage corresponding to the fingerprint spot is adjusted to Gamma7, and Gamma7 corresponds to grayscale 249, so that the fingerprint spot can be within the target brightness range at grayscale 249. When the target mode is Normal8, the gamma voltage corresponding to the fingerprint spot is adjusted to Gamma8, and Gamma8 corresponds to grayscale 249, so that the fingerprint spot can be within the target brightness range at grayscale 249. When the target mode is Normal9, the gamma voltage corresponding to the fingerprint spot is adjusted to Gamma9, and Gamma9 corresponds to grayscale 249, so that the fingerprint spot can be within the target brightness range at grayscale 249.

[0073] The method for adjusting fingerprint brightness provided in the present application uses a reference grayscale as the target grayscale of the fingerprint spot. The brightness of the fingerprint spot is converted from the initial grayscale to the compensation brightness in the reference mode. When the screen is in the target mode, the compensation brightness changes, so that the actual brightness of the fingerprint spot can be within the target brightness range and approach the target brightness, thereby achieving the purpose of unlocking.

[0074] An embodiment of the present application provides a display panel, including a fingerprint spot area, and uses the above-mentioned method for adjusting fingerprint brightness to adjust the brightness of a fingerprint spot in the fingerprint spot area.

[0075] The display panel includes a fingerprint spot area. When the screen is in the target mode, the actual brightness of the fingerprint spot in the fingerprint spot area is obtained, and the difference between the actual brightness of the fingerprint spot and the target brightness is calculated. The difference is used to compensate the target brightness to obtain the actual brightness. The actual brightness is the fingerprint spot brightness of the fingerprint spot area at the initial grayscale in the reference mode, and the target brightness is the reference fingerprint spot brightness required for fingerprint unlocking. According to the correspondence between the fingerprint spot brightness and the grayscale of the fingerprint spot area in the reference mode, the reference brightness corresponding to the compensation brightness and the reference grayscale corresponding to the reference brightness are obtained, and the reference grayscale is used as the target grayscale of the fingerprint spot. The brightness of the fingerprint spot in the reference mode is converted from the initial grayscale brightness to the compensation brightness. When the screen is in the target mode, the compensation brightness changes, so that the actual brightness of the fingerprint spot in the fingerprint spot area is within the target brightness range and approaches the target brightness.

[0076] Figure 3 FIG. 1 shows a schematic diagram of a structure of a device for adjusting fingerprint brightness provided by an embodiment of the present application. Figure 3 As shown, the device 10 for adjusting fingerprint brightness in this embodiment includes:

[0077] The first acquisition module 11 is used to obtain the actual brightness of the fingerprint spot when the screen is in the target mode, calculate the difference between the actual brightness and the target brightness, and use the difference to compensate the target brightness to obtain the compensated brightness, wherein the actual brightness is the fingerprint spot brightness under the initial grayscale in the reference mode (High Brightness Mode, HBM), and the target brightness is the reference fingerprint spot brightness required for fingerprint unlocking;

[0078] A second acquisition module 12 is used to acquire a reference brightness corresponding to the compensation brightness and a reference grayscale corresponding to the reference brightness according to a pre-established correspondence between the fingerprint spot brightness and the grayscale of the fingerprint spot area in the reference mode;

[0079] The adjustment module 13 is used to use the reference grayscale as the target grayscale of the fingerprint light spot, so that the brightness of the fingerprint light spot is within a target brightness range, and the target brightness range is the fingerprint light spot brightness range required for fingerprint unlocking.

[0080] The device 10 for adjusting fingerprint brightness provided in the embodiment of the present application can execute the above method embodiment. Its specific implementation principle and technical effects can be found in the above method embodiment, which will not be described in detail in this embodiment.

[0081] Figure 4 FIG. 1 shows a schematic diagram of a processing device provided in an embodiment of the present application. Figure 4 As shown, the processing device 20 of this embodiment may include: a memory 21 , a processor 22 and a communication interface 23 .

[0082] The memory 21 is used to store computer instructions. The memory 21 may include a high-speed random access memory (RAM), and may also include a non-volatile memory (NVM), such as at least one disk memory, and may also be a USB flash drive, a mobile hard disk, a read-only memory, a disk or an optical disk.

[0083] The processor 22 is used to execute the computer instructions stored in the memory to implement the method for adjusting the fingerprint brightness in the above embodiment. For details, please refer to the relevant description in the above method embodiment. The processor 22 can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the invention can be directly embodied as being executed by a hardware processor, or by a combination of hardware and software modules in the processor.

[0084] The communication interface 23 may be connected to the processor 22. The processor 22 may control the communication interface 23 to implement the functions of receiving and sending data.

[0085] The processing device provided in this embodiment can be used to execute the above-mentioned method for adjusting brightness. Its implementation method and technical effect are similar, and this embodiment will not be repeated here.

[0086] An embodiment of the present application further provides a terminal, comprising the above-mentioned display panel and a processing device, wherein the processing device is used to adjust the brightness of a fingerprint spot in a fingerprint spot area on the display panel.

[0087] The processing device adjusts the brightness of the fingerprint spot in the fingerprint spot area on the display panel. When the brightness of the screen changes, the brightness of the fingerprint spot can reach the brightness required for fingerprint unlocking, thereby effectively performing fingerprint unlocking.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for adjusting fingerprint brightness, characterized in that: The method comprises: The actual brightness of the fingerprint spot when the screen is in the target mode is obtained, the difference between the actual brightness and the target brightness is calculated, and the target brightness is compensated by the difference to obtain the compensated brightness. The actual brightness is the fingerprint spot brightness at the initial grayscale when the fingerprint spot area is converted to the reference mode, and the target brightness is the reference fingerprint spot brightness required for fingerprint unlocking; Obtaining a reference brightness corresponding to the compensation brightness and a reference grayscale corresponding to the reference brightness according to a pre-established correspondence between the fingerprint spot brightness and the grayscale of the fingerprint spot area in the reference mode; The reference grayscale is used as the target grayscale of the fingerprint light spot, so that the brightness of the fingerprint light spot is within a target brightness range, and the target brightness range is the fingerprint light spot brightness range required for fingerprint unlocking.

2. The method according to claim 1, characterized in that The using the difference to compensate the target brightness to obtain the compensated brightness specifically includes: The difference value and the target brightness are added, and the added brightness is used as the compensation brightness.

3. The method according to claim 1, characterized in that The obtaining, according to the pre-established correspondence between the fingerprint spot brightness and the grayscale of the fingerprint spot area in the reference mode, a reference grayscale corresponding to the compensation brightness and a reference grayscale corresponding to the reference brightness specifically includes: Finding a reference brightness that has the smallest difference from the compensation brightness in the pre-established correspondence between the brightness of the fingerprint spot and the grayscale in the reference mode of the fingerprint spot area; A reference gray scale corresponding to the reference brightness is obtained.

4. The method according to any one of claims 1 to 3, characterized in that: Before obtaining the target grayscale corresponding to the compensation brightness according to the pre-established correspondence between the fingerprint spot brightness and the grayscale of the fingerprint spot area in the reference mode, the method further includes: The corresponding relationship between the brightness and grayscale of the fingerprint spot area in the reference mode is established.

5. The method according to claim 4, characterized in that The maximum fingerprint spot brightness in the corresponding relationship is greater than the compensation brightness.

6. The method according to claim 4, characterized in that The establishing of the corresponding relationship between the brightness of the fingerprint spot and the gray scale in the reference mode of the fingerprint spot area specifically includes: The gamma voltage of the fingerprint spot area when it is in the reference mode is adjusted, and the grayscale and fingerprint spot brightness corresponding to each gamma voltage are obtained to establish a corresponding relationship between the grayscale and the fingerprint spot brightness.

7. The method according to claim 6, characterized in that The step of adjusting the gamma voltage of the fingerprint spot area to obtain the grayscale and fingerprint spot brightness corresponding to each gamma voltage specifically includes: The gamma voltage of the fingerprint spot area when it is in the reference mode is obtained, the gamma voltage of the reference mode is adjusted according to a preset interval, and the gray scale and fingerprint spot brightness corresponding to each gamma voltage are obtained.

8. The method according to claim 6, characterized in that The step of adjusting the gamma voltage of the fingerprint spot area to obtain the grayscale and fingerprint spot brightness corresponding to each gamma voltage specifically includes: The gamma voltage in the reference mode is adjusted according to a preset interval, and the grayscale and fingerprint spot brightness corresponding to each gamma voltage are obtained until the fingerprint spot brightness corresponding to the gamma voltage is greater than the compensation brightness.

9. A display panel, comprising a fingerprint spot area, characterized in that: The fingerprint spot brightness in the fingerprint spot area is adjusted using the method described in any one of claims 1 to 8.

10. A device for adjusting fingerprint brightness, characterized in that: include: The first acquisition module is used to acquire the actual brightness of the fingerprint spot when the screen is in the target mode, calculate the difference between the actual brightness and the target brightness, and use the difference to compensate the target brightness to obtain the compensated brightness. The actual brightness is the fingerprint spot brightness at the initial grayscale when the fingerprint spot area is converted to the reference mode, and the target brightness is the reference fingerprint spot brightness required for fingerprint unlocking; A second acquisition module, used for acquiring a reference brightness corresponding to the compensation brightness and a reference grayscale corresponding to the reference brightness according to a pre-established correspondence between the fingerprint spot brightness and the grayscale of the fingerprint spot area in the reference mode; The adjustment module is used to use the reference grayscale as the target grayscale of the fingerprint light spot so that the brightness of the fingerprint light spot is within a target brightness range, and the target brightness range is the fingerprint light spot brightness range required for fingerprint unlocking.

11. A processing device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method for adjusting fingerprint brightness according to any one of claims 1 to 8.

12. A terminal, characterized in that: The invention comprises the display panel according to claim 9 and the processing device according to claim 11.

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