Display device

Abstract

A display device includes a peripheral circuit, a first display gate line, and a first fingerprint gate line. The peripheral circuit includes a first demultiplexer. The first display gate line is electrically connected to the first demultiplexer, and the first fingerprint gate line is electrically connected to the first demultiplexer. The first display gate line transmits a first display scan signal, and the first fingerprint gate line transmits a first fingerprint scan signal.

Description

Technical Field

[0001] The present disclosure relates to a display device, and more particularly to a display device integrating a display function and a fingerprint scanning function. Background Art

[0002] As mobile devices are increasingly used, they often have a biometric recognition function, such as being able to verify identity by recognizing a user's fingerprint.

[0003] For example, mobile devices use photosensitive elements to capture the user's fingerprint features for identification. In order to facilitate user operation, the photosensitive element is integrated with the display panel of the mobile device. In this case, the circuit driving the photosensitive element and the circuit driving the display panel are both set in the peripheral area of ​​the display panel, making it difficult to reduce the width of the peripheral area of ​​the display panel. Summary of the invention

[0004] An embodiment of the present disclosure provides a display device, which includes a peripheral circuit, a first display gate line, and a first fingerprint gate line.

[0005] The peripheral circuit includes a first demultiplexer. The first display gate line is electrically connected to the first demultiplexer, and the first fingerprint gate line is electrically connected to the first demultiplexer. The first display gate line transmits a first display scan signal, and the first fingerprint gate line transmits a first fingerprint scan signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a schematic diagram of a display device according to an embodiment of the present disclosure

[0007] Figure 2 In one embodiment of the present disclosure, Figure 1 Signal timing diagram of the display device during fingerprint scanning.

[0008] Figure 3 In one embodiment of the present disclosure, Figure 1 Schematic diagram of a photosensitive pixel.

[0009] Figure 4 is a schematic diagram of a photosensitive pixel according to another embodiment of the present disclosure.

[0010] Figure 5 is a schematic diagram of a display device according to another embodiment of the present disclosure.

[0011] Figure 6 In one embodiment of the present disclosure, Figure 1 Schematic diagram of a demultiplexer.

[0012] Explanation of reference numerals: 100, 200-display device; 110, 210-peripheral circuit; 120-display scan driver; 130, 230A, 230B-fingerprint scan driver; DGL1 to DGLM-display gate lines; FGL1 to FGL(M+1)-fingerprint gate lines; DDL1 to DDLN-display data lines; DOL1 to DOLN-readout data lines; DP(1,1) to DP(M,N)-display pixels; FP(1,1) to FP(M,N), FP'-photosensitive pixels; DMUX1 to DMUX(M+1)-demultiplexers; SR1 to SR(M+1)-shift registers; LS1 to LS(M+1)-voltage conversion circuits; SIG DS1 To SIG DSM -Display scanning signal; SIG FS1 To SIG FS(M+1) -Fingerprint scanning signal; SIG DRV -Drive signal; SIG DI1 -Show scanning start signal; SIG FI1 , SIG FI2 - fingerprint scanning start signal; OR1, OR2-OR gate; T1, T2, T3-time period; PS1A, PS1B-photosensitive element; M1A, M2A, M3A, M1B, M2B-transistor; C1-capacitor; VDD-operating voltage terminal; Vbias-bias terminal; A1, A2-sensing area; 240-touch module; 250A, 250B-controller; SIG ctrl1 , SIG ctrl2 -Control signal. DETAILED DESCRIPTION

[0013] Reference will now be made in detail to some embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0014] A structure (or layer, component, substrate) described in the present disclosure is located on / above another structure (or layer, component, substrate), which may refer to the two structures being adjacent and directly connected, or may refer to the two structures being adjacent but not directly connected, and indirect connection means that there is at least one intermediate structure (or intermediate layer, intermediate component, intermediate substrate, intermediate interval) between the two structures, the lower surface of one structure is adjacent to or directly connected to the upper surface of the intermediate structure, and the upper surface of the other structure is adjacent to or directly connected to the lower surface of the intermediate structure, and the intermediate structure may be composed of a single-layer or multi-layer physical structure or a non-physical structure, without limitation. In the present disclosure, when a certain structure is disposed "on" another structure, it may refer to the certain structure being "directly" on the other structure, or to the certain structure being "indirectly" on the other structure, that is, at least one structure is sandwiched between the certain structure and the other structure.

[0015] The electrical connection or electrical connection described in the present disclosure may refer to direct connection or indirect connection. In the case of direct connection, the endpoints of the components on the two circuits are directly connected or connected to each other by a conductor segment, and in the case of indirect connection, there is a switch, diode, capacitor, inductor, resistor, other suitable components, or a combination of the above components between the endpoints of the components on the two circuits, but it is not limited to these.

[0016] Although the terms first, second, third, etc. can be used to describe a variety of components, the components are not limited to these terms. These terms are only used to distinguish a single component from other components in the specification. The same terms may not be used in the claims, but may be replaced by first, second, third, etc. according to the order in which the components are declared in the claims. Therefore, in the following description, the first component may be the second component in the claims.

[0017] In the present disclosure, the display device has a display function, and may selectively include sensing, touch, antenna, other suitable functions or a combination of the above functions, but is not limited thereto. In some embodiments, the display device may include a splicing device, but is not limited thereto. The display device may include a liquid crystal molecule (LC molecule), an organic light-emitting diode (OLED), an inorganic light-emitting diode (LED), such as a micro-LED (micro-LED, mini-LED), a quantum dot (QDs) material, a quantum dot light-emitting diode (QLED, QDLED), a fluorescence material, a phosphor material, other suitable materials or a combination of the above, but is not limited thereto. In addition, the display device may be a color display device or a monochrome display device, and the shape of the display device may be a rectangle, a circle, a polygon, a shape with curved edges or other suitable shapes, but is not limited thereto. In the following, the display device is exemplified as a color display device having a light-emitting diode (such as an organic light-emitting diode, an inorganic light-emitting diode or a quantum dot light-emitting diode) for exemplary description, but the display device is not limited thereto. In some embodiments, the display device may also be a display device including a liquid crystal panel or other suitable display devices. Figure 1 is a schematic diagram of a display device 100 according to an embodiment of the present disclosure, the display device 100 includes a peripheral circuit 110, display gate lines DGL1 to DGLM, and fingerprint gate lines FGL1 to FGL(M+1), where M is a positive integer greater than 1. Figure 1In the embodiment, the display device 100 may further include display pixels DP(1,1) to DP(M,N) and photosensitive pixels FP(1,1) to FP(M,N).

[0018] exist Figure 1 In the display scanning operation, the display pixels DP(1,1) to DP(1,N) can be electrically connected to the display gate line DGL1, and can be electrically connected to the display data lines DDL1 to DDLN, respectively. In the display scanning operation, the display pixels DP(1,1) to DP(1,N) can be electrically connected to the display gate line DGL1 according to the display scanning signal SIG DS1 The display data on the display data lines DDL1 to DDLN are synchronized. Similarly, the display pixels DP(M, 1) to DP(M, N) can be electrically connected to the display gate line DGLM, and can be electrically connected to the display data lines DDL1 to DDLN, respectively. In this case, the display pixels DP(M, 1) to DP(M, N) can be controlled according to the display scan signal SIG on the display gate line DGLM. DSM The display data on the display data lines DDL1 to DDLN are displayed synchronously. In this way, after the display scanning operation is completed, the display pixels DP(1,1) to DP(M,N) can emit color light of corresponding intensity according to the display data received by each, so as to jointly present the screen that the system wants to display. In some embodiments, the display pixels DP(1,1) to DP(M,N) may include monochromatic light, such as the display pixel DP(1,1) is red, the display pixel DP(1,2) is green, and the display pixel DP(1,3) is blue, which are arranged in sequence to the display pixel DP(M,N), but the present disclosure is not limited to this. In some embodiments, display pixel DP(1,1) to display pixel DP(M,N) may include multi-color light, for example, display pixel DP(1,1) may include a red sub-pixel and a green sub-pixel, display pixel DP(1,2) may include a green sub-pixel and a blue sub-pixel, and they are arranged in sequence to display pixel DP(M,N); or display pixel DP(1,1) may include a red sub-pixel, a green sub-pixel and a blue sub-pixel, and display pixel DP(1,2) may also include a red sub-pixel, a green sub-pixel and a blue sub-pixel, and they are arranged in sequence to display pixel DP(M,N). The present disclosure is not limited to this.

[0019] In addition, the photosensitive pixels FP(1,1) to FP(1,N) can be electrically connected to the fingerprint gate line FGL1, and can be electrically connected to the readout data lines DOL1 to DOLN, respectively. In the fingerprint scanning operation, the photosensitive pixels FP(1,1) to FP(1,N) can be electrically connected to the fingerprint gate line FGL1 according to the fingerprint scanning signal SIG FS1The photosensitive data is synchronously output to the readout data lines DOL1 to DOLN. Similarly, the photosensitive pixels FP(M,1) to FP(M,N) can be electrically connected to the fingerprint gate line FGLM, and can be electrically connected to the readout data lines DOL1 to DOLN, respectively. In this case, the photosensitive pixels FP(M,1) to FP(M,N) can be based on the fingerprint scanning signal SIG on the fingerprint gate line FGLM. FSM The light-sensing data is synchronously output to the readout data lines DOL1 to DOLN. In this way, after the fingerprint scanning operation is completed, the light-sensing pixels FP(1,1) to FP(M,N) can output light-sensing data according to their respective light-sensing states, so that the system can determine the result of the fingerprint scanning.

[0020] In some embodiments, the peripheral circuit 110 may include demultiplexers DMUX1 to DMUXM, the demultiplexer DMUX1 may be electrically connected to the display gate line DGL1 and the fingerprint gate line FGL1, and the demultiplexer DMUXM may be electrically connected to the display gate line DGLM and the fingerprint gate line FGLM. The demultiplexer DMUX1 may transmit the display scan signal SIG via the display gate line DGL1. DS1 Or transmit the fingerprint scanning signal SIG via the fingerprint gate line FGL1 FS1 Similarly, the demultiplexer DMUXM can transmit the display scan signal SIG via the display gate line DGLM. DSM Or transmit the fingerprint scanning signal SIG via the fingerprint gate line FGLM FSM .

[0021] That is, by switching the operation mode of the demultiplexer DMUX1 to the demultiplexer DMUXM, the peripheral circuit 110 can use the same circuit to generate the display scan signal SIG. DS1 To display scan signal SIG DSM And fingerprint scanning signal SIG FS1 To fingerprint scanning signal SIG FSM , and sends corresponding signals to the display gate line DGL1 to the display gate line DGLM and the fingerprint gate line FGL1 to the fingerprint gate line FGLM. In this way, the circuit area required for the peripheral circuit 110 can be reduced, thereby reducing the frame width of the display device 100.

[0022] exist Figure 1 In the embodiment, the peripheral circuit 110 may include shift registers SR1 to SRM. The shift registers SR1 to SRM may be electrically connected to the demultiplexers DMUX1 to DMUXM, respectively. The shift register SR1 may be configured to receive a display scan start signal SIG1 and a display scan start signal SIG2. DI1 Generate display scan signal SIGDS1 , and can scan the fingerprint start signal SIG FI1 Generate fingerprint scanning signal SIG FS1 , and the shift register SR2 can be based on the display scan signal SIG DS1 Generate display scan signal SIG DS2 , and can scan the fingerprint signal SIG FS1 Generate fingerprint scanning signal SIG FS2 , and so on.

[0023] In some embodiments, since the display pixels DP(M, 1) to DP(M, N) and the photosensitive pixels FP(M, 1) to FP(M, N) have different structures, the required signal voltages are also different. That is, the display scan signal SIG DS1 To display scan signal SIG DSM The voltage may be different from the fingerprint scanning signal SIG FS1 To fingerprint scanning signal SIG FSM In this case, the display device 100 may further include a voltage conversion circuit LS1 to a voltage conversion circuit LSM. The voltage conversion circuit LS1 may be electrically connected to the demultiplexer DMUX1 and the fingerprint gate line FGL1, and may adjust the fingerprint scanning signal SIG FS1 Similarly, the voltage conversion circuit LSM can be electrically connected to the demultiplexer DMUXM and the fingerprint gate line FGLM, and can adjust the fingerprint scanning signal SIG FSM In this way, the peripheral circuit 110 can use the shift register SR1 to the shift register SRM to generate the gate signals required by the display pixel DP(1,1) to the display pixel DP(M,N) and the photosensitive pixel FP(1,1) to the photosensitive pixel FP(M,N).

[0024] In addition, in some embodiments, each of the photosensitive pixels FP(1,1) to FP(M,N) can be electrically connected to two fingerprint gate lines to perform a reset operation and a readout operation. For example, the photosensitive pixels FP(1,1) to FP(1,N) can be electrically connected to the fingerprint gate lines FGL1 and FGL2, and the photosensitive pixels FP(1,1) to FP(1,N) will be based on the fingerprint scanning signal SIG transmitted by the fingerprint gate line FGL1. FS1 Perform a read operation and transmit the fingerprint scanning signal SIG according to the fingerprint gate line FGL2 FS2 Therefore, in Figure 1In the embodiment, the peripheral circuit 110 may further include a shift register SR(M+1), a demultiplexer DMUX(M+1), a voltage conversion circuit LS(M+1) and a fingerprint gate line FGL(M+1), and the photosensitive pixels FP(M,1) to FP(M,N) may further be electrically connected to the fingerprint gate line FGL(M+1) to receive the fingerprint scanning signal SIG generated by the shift register SR(M+1). FS(M+1) And perform a reset operation.

[0025] Furthermore, in Figure 1 In the embodiment of the present invention, the display device 100 may further include a display scan driver 120, a fingerprint scan driver 130 and an OR gate OR1. The display scan driver 120 may generate a display scan start signal SIG DI1 , and the fingerprint scanning driver 130 can generate a fingerprint scanning start signal SIG FI1 The OR gate OR1 has a first input terminal, a second input terminal and an output terminal. The first input terminal of the OR gate OR1 can be electrically connected to the fingerprint scanning driver 130 to receive the fingerprint scanning start signal SIG. FI1 The second input terminal of the OR gate OR1 can be electrically connected to the display scan driver 120 to receive the display scan start signal SIG DI1 , and the output end of the OR gate OR1 can be electrically connected to the shift register SR1.

[0026] In some embodiments, the fingerprint scanning driver 130 and the display scanning driver 120 can drive the fingerprint scanning driver 130 and the display scanning driver 120 according to the same driving signal SIG DRV , generate fingerprint scanning start signal SIG at different time periods FI1 And display scanning start signal SIG DI1 For example, when the driving signal SIG DRV When the voltage is high, the display scan driver 120 can generate a display scan start signal SIG DI1 , and the fingerprint scanning driver 130 does not generate the fingerprint scanning start signal SIG FI1 ; When the driving signal SIG DRV When the voltage is low, the display scan driver 120 does not generate the display scan start signal SIG DI1 , and the fingerprint scanning driver 130 generates a fingerprint scanning start signal SIG FI1 However, the present disclosure is not limited thereto. In some other embodiments, the driving signal SIG DRV There may also be other actuation relationships between the fingerprint scanning driver 130 and the display scanning driver 120 , or the fingerprint scanning driver 130 and the display scanning driver 120 may be controlled according to different driving signals respectively.

[0027] In some embodiments, when the display device 100 intends to perform fingerprint scanning through the photosensitive pixels FP(1,1) to the photosensitive pixels FP(M,N), the photosensitive pixels FP(1,1) to the photosensitive pixels FP(M,N) are first reset, and then light is sensed after the reset is completed, and the light-sensing data generated by the photosensitive pixels FP(1,1) to the photosensitive pixels FP(M,N) after the light sensing is completed, such as voltage, is read out from the readout data line DOL1 to the readout data line DOLN. In some embodiments, during the period when the photosensitive pixels FP(1,1) to the photosensitive pixels FP(M,N) are performing light sensing, the display device 100 can use the peripheral circuit 110 to make the display pixels DP(1,1) to the display pixels DP(M,N) enter the display scanning operation. In this way, the update of the display screen will not be interrupted for a long time due to the fingerprint scanning operation, resulting in poor image quality.

[0028] Figure 2 is a signal timing diagram of the display device 100 during the fingerprint scanning period in one embodiment of the present disclosure. During the fingerprint scanning period of the display device 100, the driving signal SIG DRV The voltage may be low during the period T1, at which time the fingerprint scanning driver 130 may generate a fingerprint scanning start signal SIG. FI1 , and the shift register SR1 to the shift register SR(M+1) will also generate the fingerprint scanning signal SIG in sequence FS1 To fingerprint scanning signal SIG FS(M+1) , so that the photosensitive pixels FP(1,1) to FP(M,N) are reset. In the light-sensing process after the photosensitive pixels FP(1,1) to FP(M,N) are reset, the display device 100 can make the driving signal SIG DRV becomes a high voltage, and the scan driver 120 generates a display scan start signal SIG DI1 , and the shift register SR1 to the shift register SRM will also generate the display scanning signal SIG in sequence DS1 To display scan signal SIG DSM , so that the display pixels DP(1,1) to DP(M,N) enter the scanning state and obtain the display data that the system wants to present. Then, after the photosensitive pixels FP(1,1) to FP(M,N) complete the light sensing, the driving signal SIG DRV The voltage may be changed back to low voltage in the period T3, at which time the fingerprint scanning driver 130 may generate the fingerprint scanning start signal SIG again. FI1 , and the shift register SR1 to the shift register SR(M+1) will also generate the fingerprint scanning signal SIG in sequence FS1 To fingerprint scanning signal SIG FS(M+1), so as to read the photosensitive data generated by the photosensitive pixels FP(1,1) to FP(M,N) after being exposed from the data readout line DOL1 to the data readout line DOLN, and then reset the photosensitive pixels FP(1,1) to FP(M,N) to facilitate the next fingerprint scan.

[0029] Figure 3 is a schematic diagram of a photosensitive pixel FP(1,1) according to an embodiment of the present disclosure. Figure 3 The middle photosensitive pixel FP(1,1) may include a photosensitive element PS1A and transistors M1A, M2A and M3A.

[0030] The photosensitive element PS1A has a first end and a second end, and the second end of the photosensitive element PS1A can be electrically connected to the bias end Vbias. The transistor M1A has a first end, a second end, and a third end, and the first end of the transistor M1A can be electrically connected to the operating voltage end VDD, the second end of the transistor M1A can be electrically connected to the first end of the photosensitive element PS1A, and the third end of the transistor M1A can be electrically connected to the fingerprint gate line FGL2. The transistor M2A has a first end, a second end, and a third end, and the first end of the transistor M2A can be electrically connected to the operating voltage end VDD, and the third end of the transistor M2A can be electrically connected to the first end of the photosensitive element PS1A. The transistor M3A has a first end, a second end, and a third end, and the first end of the transistor M3A can be electrically connected to the second end of the transistor M2A, the second end of the transistor M3A can be electrically connected to the readout data line DOL1, and the third end of the transistor M3A can be electrically connected to the fingerprint gate line FGL1.

[0031] In some embodiments, the photosensitive element PS1A may be a photodiode, and its main operation may include three stages, a reset stage, a photosensitive stage, and a reading stage. In the reset stage, the voltage at the first end of the photosensitive element PS1A may be reset to a preset voltage. Then, in the photosensitive stage, the photosensitive element PS1A generates a current leakage of the reverse bias voltage of the photosensitive diode according to the received light intensity, resulting in the voltage at the first end of the photosensitive element PS1A being reduced to varying degrees. At the end of the photosensitive stage, the voltage at the first end of the photosensitive element PS1A may be regarded as the sensing voltage of the photosensitive element PS1A. Then, in the reading stage, the photosensitive pixel FP(1,1) may generate photosensitive data according to the sensing voltage at the first end of the photosensitive element PS1A, and output it from the data readout line DOL1. In this way, the processor in the display device 100 or the system may analyze the light receiving degree of the photosensitive element PS1A in the photosensitive pixel FP(1,1) according to the photosensitive data, and then determine the texture of the surface of the object, such as but not limited to fingerprints. In addition, the present disclosure is not limited to using a photodiode as the light sensing element PS1A. In some embodiments, the light sensing element PS1A may also use a photo transistor or CIS (CMOS Image Sensor), but the present disclosure is not limited thereto.

[0032] by Figure 2 As an example, in period T1, when the fingerprint scanning signal SIG FS2 When the fingerprint gate line FGL2 is transmitted to the third terminal of the transistor M1A, the transistor M1A will be turned on, and the voltage of the first terminal of the photosensitive element PS1A will be reset. Then, when the fingerprint gate line FGL2 returns to a low potential, the transistor M1A will be turned off, and the photosensitive element PS1A can enter the photosensitive stage. In the period T3, when the fingerprint scanning signal SIG FS1 When the fingerprint is transmitted to the third terminal of the transistor M3A via the fingerprint gate line FGL1, the transistor M3A will be turned on. At this time, the transistor M2A will generate a voltage signal of corresponding magnitude as the photosensitivity data according to the voltage of the first terminal of the photosensitive element PS1A, and can be output to the data readout line DOL1 via the transistor M3A.

[0033] In addition, the photosensitive pixels FP(1,1) to FP(M,N) disclosed in the present invention are not limited to Figure 3 The structure shown is limited. In some other embodiments, the photosensitive pixels FP(1,1) to FP(M,N) also have other structures. Figure 4 1 is a schematic diagram of a photosensitive pixel FP' according to another embodiment of the present disclosure. In some embodiments, the photosensitive pixels FP(1,1) to FP(M,N) in the display device 100 may also have the same structure as the photosensitive pixel FP'.

[0034] The photosensitive pixel FP' includes a photosensitive element PS1B, a capacitor C1, and transistors M1B and M2B. The photosensitive element PS1B has a first end and a second end, and the second end of the photosensitive element PS1B can be electrically connected to the fingerprint gate line FGL2. The capacitor C1 has a first end and a second end, and the first end of the capacitor C1 can be electrically connected to the operating voltage terminal VDD, and the second end of the capacitor C1 can be electrically connected to the first end of the photosensitive element PS1B. The transistor M1B has a first end, a second end, and a third end, and the first end of the transistor M1B can be electrically connected to the operating voltage terminal VDD, and the third end of the transistor M1B can be electrically connected to the first end of the photosensitive element PS1B. The transistor M2B has a first end, a second end, and a third end, and the first end of the transistor M2B can be electrically connected to the second end of the transistor M1B, and the second end of the transistor M2B can be electrically connected to the readout data line DOL1, and the third end of the transistor M2B can be electrically connected to the fingerprint gate line FGL1.

[0035] In this embodiment, when the fingerprint scanning signal SIG FS2 When the fingerprint gate line FGL2 is transmitted to the second end of the photosensitive element PS1B, the photosensitive element PS1B will present a forward bias, so that the voltage of the first end of the photosensitive element PS1B is reset. Then, when the fingerprint gate line FGL2 returns to a low potential, the photosensitive element PS1B will be in a reverse bias, and the photosensitive element PS1B can enter the photosensitive stage. FS1 When the fingerprint is transmitted to the third terminal of the transistor M2B via the fingerprint gate line FGL1, the transistor M2B will be turned on. At this time, the transistor M1B will generate a voltage signal of a corresponding magnitude as the photosensitive data according to the voltage of the first terminal of the photosensitive element PS1B, and can be output to the data readout line DOL1 via the transistor M2B.

[0036] Figure 3 and Figure 4 The photosensitive pixels shown only provide some possible embodiments of the present disclosure and are not intended to limit the structure of the photosensitive pixels FP(1,1) to FP(M,N). In some other embodiments, the photosensitive pixels FP(1,1) to FP(M,N) may also have other structures.

[0037] In addition, in common usage scenarios, for example, the size of a finger only occupies a small portion of the screen. Therefore, if all photosensitive pixels FP(1,1) to photosensitive pixels FP(M,N) are scanned each time a fingerprint is scanned, the time required for scanning the fingerprint may be prolonged, resulting in a waste of time and power. In some embodiments, the display device can scan the photosensitive pixels FP(1,1) to photosensitive pixels FP(M,N) in partitions through a peripheral device to shorten the time required for fingerprint scanning.

[0038] Figure 5 is a schematic diagram of a display device 200 according to an embodiment of the present disclosure. The display device 200 has a similar structure to the display device 100 and can operate according to similar principles. The display device 200 can divide the photosensitive pixels of every m columns into a zone, and can scan each zone independently, where m is an integer greater than 0 and less than M. For example, the photosensitive pixels FP(1,1) to FP(m,N) in the first to mth columns can be regarded as photosensitive pixels of the first sensing area A1, and the photosensitive pixels FP(m+1,1) to FP(2m,N) in the (m+1)th to (2m)th columns can be regarded as photosensitive pixels of the second sensing area A2, and so on.

[0039] In addition, the display device 200 may include a touch module 240, which can determine the coordinates of the display device 200 being touched. When the touch module 240 determines that the touched coordinates fall within the first sensing area A1, the peripheral circuit 210 can scan the photosensitive pixels FP(1,1) to the photosensitive pixels FP(m,N) in the first sensing area A1, but not scan other photosensitive pixels. Similarly, when the touch module 240 determines that the touched coordinates fall within the second sensing area A2, the peripheral circuit 210 can scan the photosensitive pixels FP(m+1,1) to the photosensitive pixels FP(2m,N) in the second sensing area A2, but not scan other photosensitive pixels. In this way, the display device 200 can perform fingerprint scanning on the area where the finger is located, thereby shortening the time required for fingerprint scanning and improving the efficiency of fingerprint scanning.

[0040] In this embodiment, the display device 200 may include a plurality of fingerprint scanning drivers, wherein the fingerprint scanning driver 230A may generate a fingerprint scanning start signal SIG FI1 , and the fingerprint scanning driver 230B can generate a fingerprint scanning start signal SIG FI2 For example, when the touch module 240 determines that the touched coordinates fall within the first sensing area A1, the fingerprint scanning driver 230A may generate a fingerprint scanning start signal SIG FI1 , and the fingerprint scanning driver 230B does not generate the fingerprint scanning start signal SIG FI2 At this time, the shift register SR1 can be based on the fingerprint scanning start signal SIG FI1 Generate fingerprint scanning signal SIG FS1 Similarly, when the touch module 240 determines that the touched coordinates fall within the second sensing area A2, the fingerprint scanning driver 230B may generate a fingerprint scanning start signal SIG. FI2 , and the fingerprint scanning driver 230A does not generate the fingerprint scanning start signal SIG FI1At this time, the shift register SR(m+1) can be used according to the fingerprint scanning start signal SIG FI2 Generate fingerprint scanning signal SIG FS(m+1) .

[0041] However, the present disclosure does not limit the display device 200 to only scanning one sensing area at a time. In some other embodiments, the display device 200 may also scan two or more sensing areas. For example, after the display device 200 performs fingerprint scanning on the first sensing area A1, it may continue to perform fingerprint scanning on the second sensing area A2 to ensure that a complete fingerprint can be scanned. In this case, the shift register SR(m+1) will be based on the fingerprint scanning signal SIG FSm Generate a fingerprint scanning signal SIGFS(m+1).

[0042] exist Figure 5 In the embodiment, the display device 200 may further include an OR gate OR2. The OR gate OR2 has a first input terminal, a second input terminal and an output terminal. The first input terminal of the OR gate OR2 may receive the fingerprint scanning start signal SIG. FI2 The second input terminal of the OR gate OR2 can be electrically connected to the shift register SRm to receive the fingerprint scanning signal SIG FSm And display scan signal SIG DSm , and the output end of the OR gate OR2 can be electrically connected to the shift register SR(m+1).

[0043] In addition, in some embodiments, since the shift register SR(m+1) receives the fingerprint scanning signal SIG FSm After that, a fingerprint scanning signal SIG will be generated accordingly. FS(m+1) Therefore, if the display device 200 only wants to scan the photosensitive pixels FP(1,1) to FP(m,N) in the first sensing area A1, and does not want to scan the photosensitive pixels FP(m+1,1) to FP(2m,N) in the second sensing area A2, the demultiplexers DMUX(m+1) to DMUX(2m) can stop transmitting the fingerprint scanning signal SIG FS(m+1) To fingerprint scanning signal SIG FS(2m) Transmitted to the fingerprint gate line FGL(m+1) to the fingerprint gate line FGL(2m).

[0044] For example, the display device 200 may further include a plurality of controllers, wherein the controller 250A may generate the control signal SIG ctrl1 To control the demultiplexers DMUX1 to DMUXm, the controller 250B can generate a control signal SIG ctrl2To control the demultiplexer DMUX(m+1) to the demultiplexer DMUX(2m). That is, the display device 200 can use different controllers to control the demultiplexers corresponding to different sensing areas to ensure that the photosensitive pixels in the corresponding sensing area can receive the fingerprint scanning signal in a timely manner.

[0045] Figure 6 Schematic diagram of a demultiplexer DMUX1 according to an embodiment of the present disclosure. The demultiplexer DMUX1 may include a first control transistor CM1 and a second control transistor CM2. The first control transistor CM1 has a first end, a second end, and a third end. The first end of the first control transistor CM1 may be electrically connected to the shift register SR1, and the second end of the first control transistor CM1 may be electrically connected to the display gate line DGL1. The second control transistor CM2 has a first end, a second end, and a third end. The first end of the second control transistor CM2 may be electrically connected to the shift register SR1, and the second end of the second control transistor CM2 may be electrically connected to the fingerprint gate line FGL1.

[0046] exist Figure 6 In the embodiment, the first control transistor CM1 is an N-type transistor, and the second control transistor CM2 is a P-type transistor, so the third terminal of the first control transistor CM1 and the third terminal of the second control transistor CM2 can receive the same control signal SIG ctrl1 . However, in some other embodiments, the first control transistor CM1 is a P-type transistor, and the second control transistor CM2 is an N-type transistor. Alternatively, in some other embodiments, the first control transistor CM1 and the second control transistor CM2 may also be both N-type transistors or both P-type transistors. In this case, the third end of the first control transistor CM1 and the third end of the second control transistor CM2 may respectively receive two complementary control signals to ensure that the display gate line DGL1 and the fingerprint gate line FGL1 do not transmit the scan signal at the same time.

[0047] In summary, the display device provided by the present disclosure can switch the mode of the demultiplexer so that the peripheral circuit uses the same circuit to generate the display scanning signal and the fingerprint scanning signal, and sends the corresponding signal to the display gate line and the fingerprint gate line. In this way, the circuit area required by the peripheral circuit can be reduced, and the frame width of the display device can be reduced.

[0048] The above description is only an embodiment of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A display device, characterized in that: Include: Peripheral circuits, including: a first demultiplexer; and A first shift register, electrically connected to the first demultiplexer, for generating a first display scanning signal according to a display scanning start signal and generating a first fingerprint scanning signal according to a first fingerprint scanning start signal; A first display gate line electrically connected to the first demultiplexer for transmitting the first display scanning signal; and A first fingerprint gate line electrically connected to the first demultiplexer for transmitting the first fingerprint scanning signal; During the fingerprint scanning period of the display device: The display device generates the first fingerprint scanning start signal to reset a plurality of photosensitive pixels in the display device; During the light-sensing process after the plurality of light-sensing pixels are reset, the display device generates the display scanning start signal; and After the plurality of photosensitive pixels complete the photosensitive processing, the display device generates the first fingerprint scanning start signal again to read the plurality of photosensitive data generated by the plurality of photosensitive pixels.

2. The display device according to claim 1, wherein: The first demultiplexer transmits the first display scanning signal via the first display gate line or transmits the first fingerprint scanning signal via the first fingerprint gate line according to the first control signal.

3. The display device according to claim 1, wherein: It includes a first photosensitive pixel electrically connected to the first fingerprint gate line.

4. The display device according to claim 1, wherein: It includes a first display pixel electrically connected to the first display gate line.

5. The display device according to claim 1, wherein: Also includes: A second display gate line, used for transmitting a second display scanning signal; A second fingerprint gate line, used to transmit a second fingerprint scanning signal; and A first photosensitive pixel is electrically connected to the first fingerprint gate line and the second fingerprint gate line; The peripheral circuit further comprises: a second shift register electrically connected to the first shift register, for generating the second display scanning signal according to the first display scanning signal and generating the second fingerprint scanning signal according to the first fingerprint scanning signal; and The second demultiplexer is electrically connected to the second shift register, the second display gate line and the second fingerprint gate line.

6. The display device according to claim 5, characterized in that Also includes: A third display gate line, used for transmitting a third display scanning signal; A fourth display gate line, used for transmitting a fourth display scanning signal; A third fingerprint gate line, used to transmit a third fingerprint scanning signal; a fourth fingerprint gate line, used to transmit a fourth fingerprint scanning signal; and A third photosensitive pixel is electrically connected to the third fingerprint gate line and the fourth fingerprint gate line; The peripheral circuit further comprises: A third shift register, used for generating the third display scanning signal and the third fingerprint scanning signal; A third demultiplexer is electrically connected to the third shift register, the third display gate line and the third fingerprint gate line; a fourth shift register, configured to generate the fourth display scan signal according to the third display scan signal, and to generate the fourth fingerprint scan signal according to the second fingerprint scan start signal or the third fingerprint scan signal; and The fourth demultiplexer is electrically connected to the fourth shift register, the fourth display gate line and the fourth fingerprint gate line.

7. The display device according to claim 1, wherein: The first demultiplexer further comprises: A first control transistor and a second control transistor, wherein one end of the first control transistor and one end of the second control transistor are electrically connected to the same control signal, the other end of the first control transistor is electrically connected to the first display gate line, and the other end of the second control transistor is electrically connected to the first fingerprint gate line.

8. The display device according to claim 7, characterized in that The first control transistor is an N-type transistor, and the second control transistor is a P-type transistor.

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