Display device and electronic equipment

Abstract

The application discloses a display device and electronic equipment, the display device includes display panel and drive circuit, through refreshing the display data of multiple pixels in each frame of the exposure stage of the fingerprint working cycle, the number of frames of refreshing the display data in the fingerprint working cycle is increased, compared with refreshing the display data once every other frame in the fingerprint working cycle, not only the refresh frequency of the display panel is improved, and the number of frames of the pixel voltage is changed greatly is fundamentally reduced, thereby the phenomenon that the display with fingerprint identification flashes is improved.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display device and electronic device. Background Technology

[0002] In display devices with fingerprint recognition capabilities, the operating time of the display device typically includes alternating fingerprint working cycles and display working cycles. During the fingerprint working cycle, the brightness of the display device differs significantly from that during the display working cycle, resulting in a flickering phenomenon that is perceptible to the human eye in the display effect. Summary of the Invention

[0003] This application provides a display device and electronic device to alleviate the technical problem of flickering in displays with fingerprint recognition.

[0004] In a first aspect, this application provides a display device, which includes a display panel and a driving circuit. The display panel includes a plurality of pixels and at least one fingerprint recognition sensor. Each fingerprint working cycle of the fingerprint recognition sensor includes a reset phase, an exposure phase, and a reading phase. The driving circuit is connected to the plurality of pixels. The driving circuit stops refreshing the display data of the plurality of pixels during the reset phase and the reading phase, and refreshes the display data of the plurality of pixels in each frame of the exposure phase.

[0005] In some implementations, the exposure phase is located between the reset phase and the reading phase in a fingerprint cycle.

[0006] In some implementations, the duration of the reset phase and the reading phase are both at least one frame; the duration of the exposure phase is at least two frames.

[0007] In some implementations, the duration of the reset phase and the reading phase are both one frame; the duration of the exposure phase is three frames.

[0008] In some implementations, the driving circuit stops refreshing the display data of multiple pixels during the reset phase and the reading phase according to the fingerprint recognition command, and refreshes the display data of multiple pixels in each frame of the exposure phase.

[0009] In some embodiments, the driving circuit includes a gate driving circuit and a data driving circuit connected to multiple pixels. After receiving a fingerprint recognition command, the data driving circuit adjusts the gamma voltage of each pixel to a first gamma voltage in the frame before the reset phase and the frame before the read phase.

[0010] In some implementations, the data driving circuit adjusts the gamma voltage of each pixel to a second gamma voltage in the frame following the reset phase and the frame following the read phase, the second gamma voltage being lower than the first gamma voltage.

[0011] In some implementations, the exposure phase includes successive frames and a last frame. In the last frame, the data driving circuit adjusts the gamma voltage of each pixel to a first gamma voltage, and in each of the other frames, adjusts the gamma voltage of each pixel to a second gamma voltage, where the second gamma voltage is lower than the first gamma voltage.

[0012] In some implementations, the data driving circuit outputs a data signal with a second gamma voltage to the corresponding pixel in the frame preceding the frame of the reset phase, and receives a fingerprint recognition command.

[0013] Secondly, this application provides an electronic device, which includes a terminal and the aforementioned display device.

[0014] The display device and electronic device provided in this application increase the number of frames for refreshing display data in the fingerprint working cycle by refreshing the display data of multiple pixels in each frame of the exposure phase of the fingerprint working cycle. Compared with refreshing the display data once every frame in the fingerprint working cycle, this not only improves the refresh rate of the display panel, but also fundamentally reduces the number of frames in which the pixel voltage changes significantly, thereby improving the flickering phenomenon of the display with fingerprint recognition. Attached Figure Description

[0015] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the structure of a display device in related technologies.

[0017] Figure 2 This is a timing diagram shown in the related technology.

[0018] Figure 3 This is a timing diagram illustrating the display and touch control in related technologies.

[0019] Figure 4 This is a timing diagram of a display and fingerprint recognition technology.

[0020] Figure 5 This is a schematic diagram comparing the changes in pixel voltage corresponding to whether fingerprint recognition is working in related technologies.

[0021] Figure 6 This is a schematic diagram of the structure of the display device provided in the embodiments of this application.

[0022] Figure 7 for Figure 6 The timing diagram of the display device is shown.

[0023] Figure 8 for Figure 7 The timing diagram shown is a specific illustration.

[0024] Figure 9 for Figure 8 The diagram shows the change in pixel voltage corresponding to the timing sequence.

[0025] Figure 10 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features thus defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more unless otherwise explicitly specified.

[0028] With the development of full-screen products, the space occupied by the fingerprint unlocking module located at the bottom of the front of the screen urgently needs to be freed up. Various solutions have been proposed to address this, such as moving the fingerprint unlocking module from the bottom of the front to the back or side. However, this method has a significant drawback: it increases the overall thickness of the product, which does not meet the demand for a thinner and lighter design. Another solution is to use iris unlocking or facial recognition technologies. These technologies also require a non-display area on the front for placing a camera or other detection modules, and they also cannot achieve an extreme screen-to-body ratio.

[0029] In contrast, a highly competitive solution is in-display fingerprint technology. This under-display fingerprint recognition design typically involves placing the fingerprint recognition module directly beneath the screen. By touching a fixed location on the screen, the fingerprint information is collected by the recognition module and compared to complete the unlocking process.

[0030] This technology also has some limitations. For example, it almost always only supports single-finger recognition. Also, it is more suitable for self-emissive display products, such as organic light-emitting diode (OLED) display devices, but it is not very compatible with liquid crystal display (LCD) devices. This is mainly because LCD products require a back panel structure, which blocks the propagation of light, causing the optical fingerprint recognition module to be unable to receive the light signal.

[0031] Based on the above, in-display fingerprint recognition technology has emerged, offering the ability to recognize fingerprints anywhere on the screen and supports multi-fingerprint recognition. Simultaneously, this solution achieves an extremely high screen-to-body ratio. It is implemented by directly integrating the fingerprint sensor into the screen, i.e., the display panel, similar to embedding a touch sensor (in-cell TP) within the pixels of the display panel. This method eliminates the need for an additional fingerprint recognition module, thus offering significant advantages in terms of overall thinness and lightness. More importantly, this solution is not limited by the type of display panel technology; it can be used in both self-emissive display devices and liquid crystal display devices.

[0032] refer to Figure 1 , Figure 1 As an example of a display device with in-screen fingerprint recognition, the display device here is used in mobile phone products. The display device has a visible area (VA), which includes a display area AA. The display area AA has multiple arrayed pixels PL. Each pixel PL may include a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B.

[0033] To achieve pixel-level fingerprint recognition accuracy, the fingerprint sensor S is integrated into the screen. For example, at least one fingerprint sensor S can be placed at each pixel PL, and fingerprint information can be collected when a finger touches any position on the display area AA.

[0034] In addition to the display area AA, the display device also has a data driving circuit 100 and a fingerprint driving circuit 200. The data driving circuit 100 is connected to each pixel PL through a data line to provide corresponding display data, and the fingerprint driving circuit 200 is connected to each fingerprint recognition sensor S to realize fingerprint recognition.

[0035] While the aforementioned in-screen fingerprint technology has many advantages, it also has many technical limitations. For example, in terms of driving, since it integrates the fingerprint sensor S into the panel, it is similar to in-cell TP in that it also needs to consider the problem of mutual interference. Therefore, a time-division driving scheme is required.

[0036] Unlike in-cell touchscreens, this in-screen fingerprint recognition solution uses a large number of fingerprint sensors (S), making the fingerprint acquisition and recognition process time-consuming. Therefore, most existing driving methods employ frame skipping, as referenced here. Figures 2 to 4 The explanation is as follows.

[0037] For example, Figure 2 As a common driving timing method, this example displays the panel at a fixed refresh rate. Each frame is incremented by F1, F2, F3, F4, F5, F... N F N+1 F N+2 F N+3 These are identified and defined as normal display frames (NF).

[0038] Figure 3 As an example of a normal display frame, the driving timing of an in-cell TP design is used as an example. Each normal display frame NF is usually composed of three time parts: the display phase DT, the touch phase TT, and the blank phase BT. The blank phase BT mentioned here is the time in a frame other than the display phase DT and the touch phase TT. Figure 3 This example demonstrates a driving timing design for an in-cell touch panel (TP), where the display phase (DT) and touch phase (TT) alternate. Other timing types exist but are not listed here.

[0039] Figure 4 The diagram shows the driving timing of the display device including the in-screen fingerprint sensor S. This driving timing has alternating normal display frames NF and blank frames BF during the fingerprint recognition working interval. Specifically, the third frame (F3) to the (N+1)th frame (F... N+1 The area containing the fingerprint sensor is the working area for fingerprint recognition. Within this area, the fingerprint recognition process cycles through alternating normal display frames (NF) and blank frames (BF) until fingerprint data acquisition is complete. Each normal display frame (NF) refreshes the displayed data, while each blank frame (BF) does not.

[0040] For multi-finger touch, the fingerprint recognition process takes longer to collect information from multiple fingerprints. Consequently, the actual display refresh rate is reduced to half its original frequency over a longer period, for example, from 60Hz to 30Hz. This timing issue causes the display panel's brightness to differ between normal display conditions and the fingerprint recognition's operating range, resulting in screen flickering.

[0041] refer to Figure 5As shown in the diagram above when the fingerprint sensor is not working, for a single pixel, its voltage level is not constant within each frame. From the start of charging, the pixel's voltage rises until it reaches the target level; after charging stops, its voltage slowly decreases over time. The difference between the highest and lowest voltage levels of this pixel within a frame is represented by ΔV1. Assuming the display data is the same for each frame, the voltage level repeats the aforementioned process in each frame. Different ΔV1 values ​​will cause different brightness changes on the display. When ΔV1 reaches a certain level, the resulting screen brightness change becomes perceptible to the human eye, causing visual flicker. In general products, ΔV1 is very small; these minute brightness changes occur at a certain frequency and are imperceptible to the human eye.

[0042] When the in-screen fingerprint recognition is working, refer to Figure 5 As shown in the diagram below, for example, starting from the third frame F3, the refresh mode alternates between one normal display frame NF and one blank frame BF. The pixel voltage level still has a difference of ΔV1 at F2. However, because the pixel is not recharged in the third frame F3, its voltage level continues to decrease. Ultimately, the difference in pixel voltage reaches ΔV2 throughout the entire second frame F2 and third frame F3, where ΔV2 is greater than ΔV1. Specifically, the first frame F1, the second frame F2, the fourth frame F4, and the sixth frame F6 are all normal display frames NF; the third frame F3, the fifth frame F5, and the seventh frame F7 are all blank frames BF. Therefore, throughout the fingerprint recognition range, the display refresh rate is reduced to half of its original value, and the voltage change of a single pixel is ΔV2.

[0043] For multi-finger fingerprint capture, the voltage change for a single pixel is ΔV2, and the cycle period of ΔV2 is half of the original display frequency. This means a large voltage difference changes repeatedly over a longer period at a lower frequency, resulting in a corresponding increase in brightness change at the corresponding pixel location. Furthermore, due to the lower frequency, this change is more easily detected by the human eye. If the display refresh rate is reduced to 1 / N of the original frequency during fingerprint-driven fingerprint capture, then ΔV2 will be even larger, and the cycle period of ΔV2 will be (1 / N) × (FR), where FR is the frame rate.

[0044] This embodiment provides a display device; please refer to [link / reference]. Figures 6 to 9 The display device includes a display panel 300 and a driving circuit 800. The display panel 300 includes a plurality of pixels PL and at least one fingerprint recognition sensor S. Each fingerprint working cycle PT of the fingerprint recognition sensor S includes a reset phase, an exposure phase, and a reading phase. The driving circuit 800 is connected to the plurality of pixels PL. The driving circuit 800 stops refreshing the display data of the plurality of pixels PL during the reset phase and the reading phase, and refreshes the display data of the plurality of pixels PL in each frame of the exposure phase.

[0045] It is understood that the display device provided in this embodiment refreshes the display data of multiple pixels PL in each frame of the exposure phase of the fingerprint working cycle PT, thereby increasing the number of frames for refreshing the display data in the fingerprint working cycle PT. Compared with refreshing the display data once every frame in the fingerprint working cycle PT, this not only improves the refresh rate of the display panel 300, but also fundamentally reduces the number of frames in which the pixel PL voltage changes significantly, thereby improving the flickering phenomenon of the display with fingerprint recognition.

[0046] It should be noted that each pixel PL may include a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. The red sub-pixel R, green sub-pixel G, and blue sub-pixel B in each pixel PL can be located in the same row and arranged sequentially along the row direction. At least one fingerprint recognition sensor S can be disposed at the corresponding location of each pixel PL to improve the accuracy of fingerprint recognition. It is understood that the pixel PL arrangement or the fingerprint recognition sensor S placement method in this application is not limited to this; it is applicable to any display with fingerprint recognition, touch recognition, or pressure recognition capabilities.

[0047] Multiple pixels PL can be arrayed in the display panel 300. Multiple fingerprint recognition sensors S can also be arrayed in the display panel 300.

[0048] In one embodiment, the driving circuit 800 includes a gate driving circuit 400 and a data driving circuit 100 connected to a plurality of pixels PL. The data driving circuit 100 may include one or more data driving chips.

[0049] It should be noted that, under the control of the gate driving circuit 400, the display data output by the data driving circuit 100 can be written into the corresponding pixel PL. In some other embodiments, the cooperation of the gate driving circuit 400 is not required, and the data driving circuit 100 provides display data without pulses, which also prevents the display data in the corresponding pixel PL from being refreshed.

[0050] In one embodiment, the display device may further include a fingerprint driving circuit 200, which is connected to at least one fingerprint recognition sensor S.

[0051] In other embodiments, the fingerprint driving circuit 200 may be included in the data driving circuit 100, or the fingerprint driving circuit 200, the data driving circuit 100, and the gate driving circuit 400 may all be included in the driving circuit 800.

[0052] Figure 7 for Figure 6The diagram shows the timing of the display device. The display data output sequentially by the data driving circuit 100 can be from the first frame F1 to the (N+3)th frame F1. N+3 Assuming the data driving circuit 100 receives the fingerprint recognition command CMD in the first frame F1, the fingerprint working cycle PT includes the third frame F3 to the (N+2)th frame F1. N+2 .

[0053] In each fingerprint working cycle, the reset phase, exposure phase, and reading phase are performed sequentially.

[0054] The reset phase can last for at least one frame; for example, it can be the third frame F3. This third frame F3 is a blank frame BF, in which the display data of multiple pixels PL is not refreshed. The read phase can also last for at least one frame; for example, it can be the (N+2)th frame F3. N+2 The (N+2)th frame F N+2 Also known as a blank frame (BF), the display data of multiple pixels (PL) in a blank frame (BF) is also stopped refreshing.

[0055] The exposure phase lasts for at least two frames. For example, the exposure phase could be exemplarily from frame 4 (F4) to frame N+1 (F4). N+1 Among them, the fourth frame F4 to the (N+1)th frame F N+1 Each frame refreshes the display data of multiple pixels (PL).

[0056] Therefore, by increasing the number of frames for display data refresh during the fingerprint working cycle PT, that is, by also refreshing the display data during the blank frames BF of the original fingerprint working cycle PT, the refresh rate of the display panel 300 is increased, and the frequency of ΔV2 of pixel PL is fundamentally reduced.

[0057] In one embodiment, the data driving circuit 100 configures a second gamma voltage, Gamma_1, for each pixel PL in the first frame F1. This second gamma voltage Gamma_1 is understood to enable the display of the normal display frame NF. After the data driving circuit 100 receives the fingerprint recognition command CMD, it displays the second frame F2 (the frame preceding the reset phase) and the (N+1)th frame F1 (the frame preceding the reading phase). N+1 The gamma voltage of each pixel's PL is adjusted to the first gamma voltage Gamma_2. The first gamma voltage Gamma_2 is higher than the second gamma voltage Gamma_1.

[0058] Understandably, this reduces the variation in gamma voltage between the second frame (F2) and the third frame (F3), thereby reducing the overall brightness difference between them and also narrowing the brightness difference with the first frame (F1) and the fourth frame (F4), thus further improving flicker. Similarly, the gamma voltage can also be reduced in the (N+1)th frame (F... N+1 and frame N+2 F N+2 The amount of change in the value, thus reducing the value of F in the (N+1)th frame. N+1 and frame N+2 F N+2 The overall brightness difference in the frame has also decreased compared to frame N+1. N+1 , frame N+3 F N+3 The difference in brightness can further improve the flickering phenomenon.

[0059] It should be noted that the higher the gamma voltage, the higher the brightness. The data drive circuit 100 operates in the frame following the reset phase (the fourth frame, F4) and in the frame following the read phase (the N+3rd frame, F). N+3 The gamma voltage of each pixel PL is adjusted to the second gamma voltage Gamma_1 to achieve normal display of the frame NF.

[0060] Specifically, the exposure phase includes subsequent frames (e.g., the fourth frame F4...) and the last frame (e.g., the N+1th frame F...). N+1 In the last frame, the data driving circuit 100 adjusts the gamma voltage of each pixel PL to the first gamma voltage Gamma_2, and in each other frame, adjusts the gamma voltage of each pixel PL to the second gamma voltage Gamma_1, where the second gamma voltage Gamma_1 is lower than the first gamma voltage Gamma_2.

[0061] Figure 8 for Figure 7 This is a specific schematic diagram of the timing sequence shown. (And...) Figure 7 compared to, Figure 8 The reset phase shown is the third frame, F3. This third frame, F3, is a blank frame, BF, in which the display data of multiple pixels, PL, is not refreshed. The read phase is the seventh frame, F7. This seventh frame, F7, is also a blank frame, BF, and similarly, the display data of multiple pixels, PL, is not refreshed. The exposure phase is from the fourth frame, F4, to the sixth frame, F6. In each of these frames, the display data of multiple pixels, PL, is refreshed.

[0062] Specifically, when the system application requires fingerprint recognition, the system sends a fingerprint recognition command (CMD) to the data driver circuit 100, informing the data driver circuit 100 that fingerprint recognition needs to be started. Figure 8 The example shows the fingerprint recognition command CMD issued when F1 is pressed in the first frame.

[0063] Step 1: After receiving the fingerprint recognition command CMD in the first frame F1, the data driving circuit 100 starts adjusting the gamma voltage (Gamma) of the display device from the second frame F2. That is, in the first frame F1, Gamma is configured as the second gamma voltage Gamma_1, while in the second frame F2, Gamma is configured as the first gamma voltage Gamma_2.

[0064] Step 2: After the second frame F2 ends, the third frame F3 is entered, which is the blank frame (BF). In this blank frame, the display data of each pixel PL is not updated; the fingerprint recognition enters the working state. Taking the active photodiode sensor (APS) as an example, this is the reset stage of the fingerprint recognition sensor S, which completes the action of assigning initial values ​​to the fingerprint recognition sensor S.

[0065] Step 3: The third frame F3 ends and the fourth frame F4, which is a normal display frame, begins. In this example, the fourth frame F4 and the fifth frame F5 are both normal display frames. At this time, the display data of each pixel PL is updated in each frame, and Gamma is configured to the second gamma voltage Gamma_1.

[0066] Step 4: After the fifth frame (F5) ends, the sixth frame (F6) begins. The display data of each pixel's PL is updated, and Gamma is configured to the first gamma voltage, Gamma_2.

[0067] Step 5: The sixth frame (F6) ends and the seventh frame (F7) begins, which is a blank frame. In this blank frame, the display data of each pixel (PL) is not updated. The fingerprint recognition enters the working state. Taking APS as an example, this is the reading stage of the fingerprint recognition sensor S, which reads the fingerprint data of the fingerprint recognition sensor S.

[0068] Step 6: After the seventh frame (F7) ends, the entire fingerprint working cycle PT operation is completed, and the eighth frame (F8) is entered, which is the normal display frame. The display data of each pixel (PL) is updated, and Gamma is configured to the second gamma voltage Gamma_1.

[0069] At this point, the fingerprint driving circuit 200 and the fingerprint recognition sensor S have completed a full fingerprint recognition process. Figure 8 In the example, the third frame F3 to the seventh frame F7 is one fingerprint working cycle PT, that is, the behavior range of one fingerprint recognition.

[0070] Figure 9 for Figure 8 The diagram shows the change in pixel PL voltage corresponding to the timing sequence. Figure 9The diagram illustrates the voltage change trend of a single pixel. In the first frame (F1), the voltage change is still ΔV1. In the second frame (F2), due to the change in Gamma, the voltage value also changes, and the single pixel is charged to a value higher than the target value. The difference between this voltage and the original target voltage is ΔV'2, and the corresponding pixel brightness is higher than the target brightness. During the non-charging period, until the end of the third frame (F3), the voltage of this pixel continues to decrease slowly. At this time, the difference between the lowest voltage and the original target voltage is ΔV3. Compared with ΔV2, both ΔV'2 and ΔV3 are smaller than ΔV2, thus the corresponding brightness change is also reduced. When entering the fourth frame (F4), the voltage of a single pixel is charged to the original target voltage. Since the fourth frame (F4) and the fifth frame (F5) re-enter the normal display frames, the voltage difference of the pixels returns to ΔV1. This continues until entering the sixth frame (F6) and the seventh frame (F7), where the voltage difference of the pixels again reaches ΔV'2 and ΔV3, which are smaller than ΔV2. Figure 5 Compared to the figure below, the implementation scheme proposed in this application avoids the phenomenon of high brightness differences repeating at a lower frequency, thereby solving the screen flickering problem caused by blank frames.

[0071] Based on the above analysis, it can be concluded that: compared to Figure 4 The proposed solution only stops refreshing the display data during the reset and reading phases of the fingerprint sensor S, for example, entering blank frames only in the third frame (F3) and the seventh frame (F7). At other times, all display data is still refreshed. This fundamentally reduces the number of frames where pixel voltage changes significantly. Figure 4 In this process, frame skipping is performed throughout the entire fingerprint recognition range, which reduces the refresh rate by at least half.

[0072] In addition, for the frame preceding a skipped or blank frame, namely the second frame F2 and the sixth frame F6, the display refreshes normally but adjusts its Gamma to a higher first gamma voltage Gamma_2. This reduces the amount of change in pixel voltage, thereby reducing the difference in pixel brightness.

[0073] Therefore, it can be concluded that this application can not only improve the screen flickering problem caused by low-frequency driving in the in-screen fingerprint integrated display panel 300, but also improve product performance while increasing integration.

[0074] In one embodiment, such as Figure 10 As shown, this embodiment provides an electronic device 3000, which includes a terminal 2000 and the aforementioned display device 1000.

[0075] It is understood that since the electronic device 3000 provided in this embodiment includes the aforementioned display device 1000, it can also increase the number of frames for refreshing display data in the fingerprint working cycle PT by refreshing the display data of multiple pixels PL in each frame of the exposure phase of the fingerprint working cycle PT. Compared with refreshing the display data once every other frame in the fingerprint working cycle PT, this not only improves the refresh rate of the display panel 300, but also fundamentally reduces the number of frames in which the pixel PL voltage changes significantly, thereby improving the flickering phenomenon of the fingerprint recognition display.

[0076] It should be noted that the aforementioned electronic device 3000 can be a mobile phone, wristband, watch, virtual reality device, augmented reality device, etc.

[0077] The display device 1000 can be a liquid crystal display device or a self-emissive display device, such as an organic light-emitting diode display device, a mini light-emitting diode display device, a micro light-emitting diode display device, or a quantum dot light-emitting diode display device.

[0078] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0079] The display device and electronic device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display device, characterized in that, The display device includes: The display panel includes multiple pixels and at least one fingerprint recognition sensor, and each fingerprint working cycle of the fingerprint recognition sensor includes a reset phase, an exposure phase, and a reading phase. A driving circuit is connected to the plurality of pixels. The driving circuit stops refreshing the display data of the plurality of pixels during the reset phase and the read phase, and refreshes the display data of the plurality of pixels in each frame of the exposure phase. The driving circuit includes a gate driving circuit and a data driving circuit connected to the plurality of pixels. After receiving the fingerprint recognition command, the data driving circuit adjusts the gamma voltage of each pixel to a first gamma voltage in the frame before the reset phase and the frame before the read phase. The exposure phase includes successive frames and a last frame. In the last frame, the data driving circuit adjusts the gamma voltage of each pixel to a first gamma voltage, and in each of the other frames, adjusts the gamma voltage of each pixel to a second gamma voltage, wherein the second gamma voltage is lower than the first gamma voltage.

2. The display device according to claim 1, characterized in that, In one of the fingerprint working cycles, the exposure phase is located between the reset phase and the reading phase.

3. The display device according to claim 2, characterized in that, The duration of the reset phase and the duration of the read phase are both at least one frame; the duration of the exposure phase is at least two frames.

4. The display device according to claim 3, characterized in that, The duration of the reset phase and the duration of the read phase are both one frame; the duration of the exposure phase is three frames.

5. The display device according to any one of claims 1-4, characterized in that, The driving circuit stops refreshing the display data of the plurality of pixels in the reset phase and the reading phase according to the fingerprint recognition command, and refreshes the display data of the plurality of pixels in each frame of the exposure phase.

6. The display device according to claim 5, characterized in that, The data driving circuit adjusts the gamma voltage of each pixel to a second gamma voltage in the frame following the reset phase and the frame following the read phase, where the second gamma voltage is lower than the first gamma voltage.

7. The display device according to claim 6, characterized in that, The data driving circuit outputs a data signal with the second gamma voltage to the corresponding pixel in the frame preceding the frame of the reset phase, and receives the fingerprint recognition command.

8. An electronic device, characterized in that, The electronic device includes a terminal and a display device as described in any one of claims 1-7.

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