Fingerprint display device and integrated integrated circuit and method for driving the same

Abstract

A fingerprint display device has a plurality of pixel rows, wherein each of n pixel rows in the plurality of pixel rows has a plurality of display pixel units and a plurality of fingerprint pixel units, n is an integer greater than 1, and the n pixel rows are driven by at least corresponding n display scan lines and n reset and selection multiplexing lines for display and fingerprint sensing, each fingerprint pixel unit has a reset end and a selection end, the reset end of the fingerprint pixel unit of the i-th pixel row in the n pixel rows is connected to the i-th reset and selection multiplexing line among the n reset and selection multiplexing lines, and the selection end of the fingerprint pixel unit of the i-th pixel row in the n pixel rows is connected to the i-1th reset and selection multiplexing line among the n reset and selection multiplexing lines, wherein i is any integer between 1 and n.

Description

Technical Field

[0001] The present invention relates to a fingerprint display device, in particular to a fingerprint display device integrating an optical fingerprint sensor and a flat display panel, and an integrated circuit and a method for driving the same. Background Art

[0002] Figure 1 1 is a schematic diagram for explaining the integration of an optical fingerprint sensor and a liquid crystal display (LCD display) panel. The fingerprint sensor 11 is, for example, disposed between a thin film transistor layer 12 and a filter substrate layer 13 of the LCD display panel structure, so that the backlight from the reflective layer 14 can be reflected to the fingerprint sensor 11 after encountering the finger on the glass substrate 15. Since the reflectivity of the peaks and valleys of the fingerprint is different, the fingerprint image can be reconstructed according to the sensing amount of the fingerprint sensor 11.

[0003] In order to drive the aforementioned fingerprint sensor to perform fingerprint recognition on the display panel, it is generally necessary to additionally set a reset line (RST) and a select line (SEL) to control the operation of the fingerprint sensor 11. However, since the optical fingerprint sensor 11 is embedded in the pixels of the liquid crystal display panel, the additional reset line and select line will cause the aperture ratio of the liquid crystal display panel to be greatly reduced, resulting in a decrease in display brightness.

[0004] Therefore, there are still many deficiencies in the design of existing fingerprint display devices, and there is a need for improvement. Summary of the invention

[0005] The main purpose of the present invention is to provide a fingerprint display device and an integrated circuit and method for driving the same, by integrating the reset line and the selection line in the fingerprint display device into a reset and selection multiplexing line to effectively improve the panel aperture ratio.

[0006] According to one aspect of the present invention, a fingerprint display device is provided, having a plurality of pixel rows, wherein each pixel row of n pixel rows among the plurality of pixel rows has a plurality of display pixel units and a plurality of fingerprint pixel units, wherein n is an integer greater than 1, and the n pixel rows are driven by at least corresponding n display scan lines and n reset and selection multiplexing lines for display and fingerprint sensing, wherein each fingerprint pixel unit has a reset end and a selection end, wherein the reset end of the fingerprint pixel unit of the i-th pixel row among the n pixel rows is connected to the i-th reset and selection multiplexing line among the n reset and selection multiplexing lines, and the selection end of the fingerprint pixel unit of the i-th pixel row among the n pixel rows is connected to the i-1-th reset and selection multiplexing line among the n reset and selection multiplexing lines, wherein i is any integer between 1 and n.

[0007] According to another aspect of the present invention, a driving method of a fingerprint display device is provided, wherein the fingerprint display device has a plurality of pixel rows, each of n pixel rows among the plurality of pixel rows has a plurality of display pixel units and a plurality of fingerprint pixel units, n is an integer greater than 1, and the n pixel rows are driven by at least corresponding n display scan lines and n reset and selection multiplexing lines for display and fingerprint sensing, and each fingerprint pixel unit has a reset end and a selection end, and the method comprises: sequentially driving the n reset and selection multiplexing lines, wherein when driving the i-1th reset and selection multiplexing line among the n reset and selection multiplexing lines, the reset end of the fingerprint pixel unit of the i-1th pixel row among the n pixel rows is activated, and the selection end of the fingerprint pixel unit of the i-th pixel row among the n pixel rows is activated, wherein i is any integer between 1 and n.

[0008] According to another aspect of the present invention, an integrated integrated circuit is provided to control the aforementioned fingerprint display device to sequentially drive the display scan lines for display, and sequentially drive the reset and selection multiplexing lines for fingerprint sensing.

[0009] The above summary and the following detailed description are exemplary in nature and are intended to further illustrate the claims of the present invention. Other objects and advantages of the present invention will be described in the subsequent description and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Schematic diagram showing the integration of an optical fingerprint sensor and a liquid crystal display panel.

[0011] Figure 2A A circuit diagram showing an optical fingerprint pixel unit.

[0012] Figure 2B A circuit diagram showing another optical fingerprint pixel unit.

[0013] Figure 3 A system architecture diagram showing the fingerprint display device of the present invention.

[0014] Figure 4 The pixel rows of the i-1th row, the ith row, the i+1th row, etc. in the fingerprint display device of the present invention are schematically shown.

[0015] Figure 5A A circuit diagram showing the fingerprint pixel unit of the i-th pixel row according to an embodiment of the present invention.

[0016] Figure 5B Another circuit diagram of the fingerprint pixel unit of the i-th pixel row according to an embodiment of the present invention is shown.

[0017] Figure 6 Show the invention Figure 5ASchematic diagram of integrating the fingerprint pixel unit into the display pixel unit.

[0018] Fig. 7A The present invention adopts Figure 5A An operation timing diagram of a fingerprint display device having a fingerprint pixel unit.

[0019] Figure 7B The present invention adopts Figure 5A Another operation timing diagram of the fingerprint display device of the fingerprint pixel unit.

[0020] Figure 8 Show the invention Figure 5B Schematic diagram of integrating the fingerprint pixel unit into the display pixel unit.

[0021] Fig. 9 A schematic diagram showing the routing of the bottom gate line of the reset transistor on the panel.

[0022] Fig.10 The present invention adopts Figure 5B Operation timing diagram of the fingerprint pixel unit.

[0023] Fig.11A A circuit diagram showing the fingerprint pixel unit of the i-th pixel row according to another embodiment of the present invention.

[0024] Fig. 11B Another circuit diagram of the fingerprint pixel unit of the i-th pixel row is shown in another embodiment of the present invention.

[0025] Fig.12 Show the invention Fig.11A Schematic diagram of integrating the fingerprint pixel unit into the display pixel unit.

[0026] Fig.13 A circuit diagram showing the reset switch control wiring of the present invention in the display area of ​​the panel and its periphery.

[0027] Fingerprint sensor 11 Thin film transistor layer 12

[0028] Filter substrate layer 13 Reflection layer 14

[0029] Glass substrate 15 Fingerprint pixel unit 21,23

[0030] Reset transistor T1 Drive transistor T2

[0031] Select transistor T3 Load transistor T4

[0032] Optical sensor component PS Capacitor C

[0033] Panel 31 Display area 311

[0034] GOA circuit for display driver 33 Integrated integrated circuit 39

[0035] Fingerprint sensor driven GOA circuit 35 pixel row 37

[0036] Display pixel unit 41 Data line 61

[0037] Line 65 Bottom gate line 81

[0038] Switch 91 Reset line RST

[0039] Reset terminal RST' Select line SEL

[0040] Select terminal SEL' Read line RO

[0041] Readout terminals RO', RO" display scan line G-disp

[0042] Reset and select multiplexing line G-comb Reset switch control line G-RST

[0043] Control terminal G Connection terminal D, S

[0044] First end e1 Second end e2

[0045] Voltage VDD1, VDD2, VB, VSS, SVSS, SVDD, Vbias DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the implementation of the present invention and are not intended to limit the present invention.

[0047] Figure 2A A circuit diagram of an optical fingerprint pixel unit 21 is shown, which is a three-transistor (3T) fingerprint pixel circuit. The fingerprint pixel unit 21 is implemented by a reset transistor T1, a drive transistor T2, a selection transistor T3, an optical sensing element (photo sensor) PS, and a capacitor C. An array composed of multiple fingerprint pixel units 21 constitutes a fingerprint sensor. In the array composed of multiple fingerprint pixel units, the fingerprint pixel units 21 in the same column share a load transistor T4, such as Figure 2A The load transistor T4 connected to the fingerprint pixel unit 21 shown in FIG. Figure 2AThe transistors T1-T4 shown in the figure are NMOS transistors, but this is only an example and not a limitation. It is conceivable that the transistors T1-T4 may also be other types of MOS transistors, such as PMOS transistors. Each transistor T1-T4 has a control terminal and two connection terminals. For MOS transistors, the control terminal is the gate (G), and the two connection terminals are the drain (D) and the source (S). In addition, optionally, the reset transistor T1 may be constructed in the form of a dual gate. Furthermore, the reset transistor T1, the drive transistor T2 or the selection transistor T3 are not limited to a single transistor, and may also be a series connection of two transistors with control terminals connected together.

[0048] In the aforementioned Figure 2A In the optical fingerprint pixel unit 21, the control terminal (G) of the reset transistor T1 is connected to the reset line RST, and its two connection terminals (D, S) are respectively connected to the first voltage VDD1 and the optical sensing component PS. The control terminal (G) of the driving transistor T2 is connected to the connection terminal (S) of the reset transistor T1 and the optical sensing component PS, and its two connection terminals (D, S) are respectively connected to the second voltage VDD2 and the connection terminal (D) of the selection transistor T3, wherein the first voltage VDD1 and the second voltage VDD2 can be the same DC voltage source or different DC voltage sources. The control terminal (G) of the selection transistor T3 is connected to the selection line SEL, and its two connection terminals (D, S) are respectively connected to the connection terminal (S) of the driving transistor T2 and the readout line RO. The two ends of the capacitor C are respectively connected to the control terminal (G) of the driving transistor T2 and the bias voltage Vbias, and this capacitor C can be a capacitor structure formed by the components inside the optical sensing component PS, or an additionally configured capacitor structure, or a combination of the two. The two ends of the optical sensing component PS are respectively connected to the connection terminal (S) of the reset transistor T1 and the bias voltage Vbias. The control terminal (G) of the load transistor T4 is connected to the fifth voltage VB, and the two connection terminals (D, S) thereof are respectively connected to the readout line RO and the sixth voltage VSS.

[0049] With the aforementioned Figure 2AThe operation of the optical fingerprint pixel unit 21 for fingerprint sensing is as follows: first, the reset line RST is driven to turn on the reset transistor T1, and the terminal voltage of the capacitor C is reset to a default value, that is, the first voltage VDD; then, the reset transistor T1 is turned off, so that the optical sensing element PS is continuously exposed for a period of time, and as the illumination intensity and the exposure time are different, the discharge amount of the capacitor C is different, so the terminal voltage of the capacitor C is also different; when the default exposure time is reached, the selection line SEL is driven to turn on the selection transistor T3, so that the driving transistor T2 outputs a current to the readout line RO, wherein the magnitude of the output current is related to the voltage of the terminal of the capacitor C connected to the control terminal (G) of the driving transistor T2, that is, related to the illumination intensity and the exposure time, and the load transistor T4 connected to the readout line RO is equivalent to an active load, therefore, the voltage of the readout terminal RO" of the readout line RO is related to the resistance of the reset transistor T1 and the active load, and the voltage of the readout terminal RO" is read by the integrated circuit to determine the illumination intensity.

[0050] Figure 2B A circuit diagram of another optical fingerprint pixel unit 21 is shown, which is a two-transistor (2T) fingerprint pixel circuit. The fingerprint pixel unit 21 is implemented by a reset transistor T1, a driving transistor T2, an optical sensing element (photosensor) PS, and a capacitor C. An array composed of multiple fingerprint pixel units 21 constitutes a fingerprint sensor. In the array composed of multiple fingerprint pixel units 21, the fingerprint pixel units 21 in the same column share a load transistor T4, such as Figure 2B The load transistor T4 connected to the fingerprint pixel unit 21 shown in FIG. Figure 2B The transistors T1, T2 and T4 shown in the figure are NMOS transistors, but this is only for example and not for limitation. It is conceivable that the transistors T1, T2 and T4 may also be other types of MOS transistors, such as PMOS transistors. Each of the transistors T1, T2 and T4 has a control terminal and two connection terminals. For MOS transistors, the control terminal is the gate (G), and the two connection terminals are the drain (D) and the source (S). In addition, optionally, the reset transistor T1 may be constructed in the form of a dual gate. Furthermore, the reset transistor T1 or the driving transistor T2 is not limited to a single transistor, and may also be a series connection of two transistors with control terminals connected together.

[0051] In the aforementioned Figure 2BIn the optical fingerprint pixel unit 21, the control terminal (G) of the reset transistor T1 is connected to the reset line RST, and its two connection terminals (D, S) are respectively connected to the third voltage SVSS and the optical sensing component PS. The control terminal (G) of the driving transistor T2 is connected to the connection terminal (S) of the reset transistor T1 and the optical sensing component PS, and its two connection terminals (D, S) are respectively connected to the fourth voltage SVDD and the readout line RO. The two ends of the optical sensing component PS are respectively connected to the connection terminal (S) of the reset transistor T1 and the control terminal (G) of the driving transistor T2, and the selection line SEL. The two ends of the capacitor C are also respectively connected to the connection terminal (S) of the reset transistor T1 and the control terminal (G) of the driving transistor T2, and the selection line SEL. This capacitor C can be a capacitor structure formed by the components inside the optical sensing component PS, or an additionally configured capacitor structure, or a combination of the two. The control terminal (G) of the load transistor T4 is connected to the fifth voltage VB, and its connection terminal (D) is connected to the readout line RO.

[0052] With the aforementioned Figure 2B The operation of the optical fingerprint pixel unit 21 for fingerprint sensing is as follows: first, the reset line RST is driven to turn on the reset transistor T1, and the terminal voltage Vp of the capacitor C is reset to the default value, that is, the third voltage SVSS, whereby the third voltage SVSS ensures that the driving transistor T2 is turned off; then, the reset transistor T1 is turned off, so that the optical sensing element PS is continuously exposed for a period of time, and the discharge amount of the capacitor C is different with the difference in light intensity and exposure time, so the terminal voltage Vp of the capacitor C is also different; when the default exposure time is reached, the selection line SEL is driven to switch the voltage of the selection line SEL from a low level to a high level (potential difference ΔV), and because of the coupling effect, the terminal voltage Vp of the capacitor C will also increase by ΔV, so the driving transistor T2 can be turned on to output current to the readout line RO. The output current is related to the terminal voltage Vp of the capacitor C, that is, it is related to the light intensity and exposure time. The load transistor T4 connected to the readout line RO is equivalent to an active load. Therefore, the voltage at the readout terminal RO" of the readout line RO is related to the resistance of the reset transistor T1 and the active load. By reading the voltage at the readout terminal RO" through the integrated circuit, the illumination intensity can be determined.

[0053] To avoid Figure 2A and Figure 2B The problem of significantly reducing the aperture ratio of the display panel due to the need to set up additional reset lines RST and select lines SEL is solved. In one embodiment of the fingerprint display device of the present invention, the reset lines RST and select lines SEL of adjacent rows are reused, so that only one reset and select multiplexing line G-comb is required in an optical fingerprint pixel unit. Please refer to Figure 3The system architecture diagram of the fingerprint display device of the present invention is shown, wherein a display gate GOA (gate on array) circuit 33 is provided on the left and right sides of a panel 31, which is used to sequentially drive the display scan line G-disp according to the control signal of an integrated integrated circuit 39 for display. In addition, in order to realize the fingerprint detection function, a fingerprint sensing drive GOA circuit 35 is provided on the left and right sides of the panel 31, which is used to sequentially drive the reset and selection multiplexing line G-comb according to the control signal of the integrated integrated circuit 39 for fingerprint sensing, and the sensed fingerprint data is read by the readout line RO to the integrated integrated circuit 39 for fingerprint recognition. Specifically, in the actual circuit, after the readout line RO extends out of the panel 31, it can enter the integrated integrated circuit 39 through a multiplexer and multiplex the same line with the data line to save the number of pins of the integrated integrated circuit 39. In the present invention, the panel 31 can be any type of flat display panel, such as an LCD panel or an OLED panel. Although the present embodiment shows that the display-driven GOA circuit 33 and the fingerprint-sensing-driven GOA circuit 35 are both disposed on the left and right sides of the panel 31, the present invention is not limited thereto. In other embodiments, the display-driven GOA circuit 33 and the fingerprint-sensing-driven GOA circuit 35 may also be disposed on the same side of the panel 31, or the display-driven GOA circuit 33 is disposed on one side of the panel 31, and the fingerprint-sensing-driven GOA circuit 35 is disposed on the other side of the panel 31. In addition, the panel 31 of the fingerprint display device of the present invention may also provide a touch sensing function, for example, by cutting the common electrode of the panel 31 to serve as a touch sensor (not shown), the touch sensor senses the touch of the user's finger and transmits the touch signal to the integrated integrated circuit 39 for touch detection to realize the touch sensing function, wherein the cutting of the common electrode as a touch sensor is known to those skilled in the art, so it will not be repeated here. That is to say, in one embodiment, the present invention may provide an electronic device having three-in-one functions such as fingerprint sensing, touch sensing and display, and an integrated circuit and a driving method thereof that can be used to drive the electronic device.

[0054] At Figure 3The fingerprint display device of the present invention has multiple pixel rows 37, among which n pixel rows 37 can provide display and fingerprint recognition functions, n is an integer greater than 1, that is, each pixel row 37 of the n pixel rows 37 has multiple display pixel units 41 and multiple fingerprint pixel units 21, and the n pixel rows 37 are driven by at least n display scan lines G-disp and n reset and selection multiplexing lines G-comb to perform display and fingerprint sensing. In one embodiment, the number of display pixel units 41 in a pixel row 37 is the same as the number of fingerprint pixel units 21. However, the present invention is not limited thereto. In other embodiments, the number of fingerprint pixel units 21 in a pixel row 37 may be less than the number of display pixel units 41. In addition, the pixel rows 37 in the entire display area of ​​the panel 31 may have display pixel units 41 and fingerprint pixel units 21, or only a portion of the display area, for example, the pixel rows 37 in one-third of the display area have display pixel units 41 and fingerprint pixel units 21, while the pixel rows 37 in the remaining display area only have display pixel units 41.

[0055] Please refer to Figure 4 The figure schematically shows the i-1th, i-th and i+1th pixel rows 37 of the n pixel rows 37 of the fingerprint display device, wherein the pixel row 37 has a display pixel unit 41 and Figure 2A2B, a display pixel unit 41 in a pixel row 37 corresponds to a fingerprint pixel unit 21, but this is only for convenience of explanation and not limitation. The display pixel units 41 in the same pixel row 37 are connected to the same display scan line G-disp, and the fingerprint pixel units 21 on the same pixel row 37 are connected to the reset and selection multiplexing line G-comb corresponding to the pixel row 37 and the reset and selection multiplexing line G-comb corresponding to the previous pixel row 37. Accordingly, the n pixel rows 37 are driven by the corresponding n display scan lines G-disp and n reset and selection multiplexing lines G-comb for display and fingerprint sensing, wherein each fingerprint pixel unit 21 has a reset terminal R ST' and a selection terminal SEL', the reset terminal RST' of the fingerprint pixel unit 21 of the i-th pixel row among the n pixel rows 37 is connected to the i-th reset and selection multiplexing line G-comb(i) among the n reset and selection multiplexing lines G-comb, and the selection terminal SEL' of the fingerprint pixel unit 21 of the i-th pixel row among the n pixel rows 37 is connected to the i-1-th reset and selection multiplexing line G-comb(i-1) among the n reset and selection multiplexing lines G-comb, where i is any integer between 1 and n. Accordingly, the fingerprint display device of the present invention drives the display pixel unit 41 of the i-th pixel row among the n pixel rows 37 with the i-th display scan line G-disp(i) among the n display scan lines G-disp for display, and drives the selection end SEL' and the reset end RST' of the fingerprint pixel unit 21 of the i-th pixel row among the n pixel rows 37 with the i-1-th reset and selection multiplexing line G-comb(i-1) and the i-th reset and selection multiplexing line G-comb(i) among the n reset and selection multiplexing lines G-comb for fingerprint sensing.

[0056] Please refer to Figure 5AA circuit diagram of a fingerprint pixel unit 21 of the i-th pixel row among the n pixel rows 37 according to an embodiment of the present invention is shown, wherein the reset transistor T1 has a control terminal (G), a first connection terminal (D) and a second connection terminal (S), the control terminal (G) is used as the reset terminal RST' and is connected to the i-th reset and selection multiplexing line G-comb (i) among the n reset and selection multiplexing lines G-comb, and the first connection terminal (D) is connected to the first voltage VDD1; the driving transistor T2 has a control terminal (G), a first connection terminal (D) and a second connection terminal (S), the control terminal (G) is connected to the second connection terminal (S) of the reset transistor T1, and the i-th reset and selection multiplexing line G-comb (i) is connected to the first voltage VDD1; a connection terminal (D) connected to a second voltage VDD2, wherein the first voltage VDD1 and the second voltage VDD2 may be the same DC voltage source or different DC voltage sources; a selection transistor T3 having a control terminal (G), a first connection terminal (D) and a second connection terminal (S), wherein the control terminal (G) is used as a selection terminal SEL' and is connected to the i-1th reset and selection multiplexing line G-comb (i-1) among the n reset and selection multiplexing lines G-comb, the first connection terminal (D) is connected to the second connection terminal (S) of the driving transistor T2, and the second connection terminal (S) is used as a readout terminal RO' and is connected to the readout line RO; an optical sensing element (photo sensor) PS having two ends respectively connected to the second connection terminal (S) of the reset transistor T1 and a bias voltage Vbias; and a capacitor C having two ends respectively connected to the control terminal (G) of the driving transistor T2 and the bias voltage Vbias. In one embodiment, the capacitor C may be a capacitor structure formed by components inside the optical sensing element PS, but is not limited thereto.

[0057] Depend on Figure 5A It can be seen that the present invention can replace the original two reset lines RST and selection line SEL with a reset and selection multiplexing line G-comb, so it can drive a pixel row by reducing one driving line, thereby improving the panel penetration rate. The reset and selection multiplexing lines G-comb (1), G-comb (2) ... G-comb (n-1), G-comb (n) in the entire fingerprint sensing array are driven in sequence. When the reset and selection multiplexing line G-comb (i-1) is driven, the selection transistor T3 of the fingerprint pixel unit 21 of the i-th pixel row in the n pixel rows is turned on to read out the fingerprint signal, and then the reset and selection multiplexing line G-comb (i) is driven to turn on the reset transistor T1 to reset the level of the capacitor C, thereby achieving the effect of fingerprint sensing.

[0058] Figure 5BAnother circuit diagram of the fingerprint pixel unit 21 of the i-th pixel row among the n pixel rows according to an embodiment of the present invention is shown, wherein the reset transistor T1 has a control terminal (G), a first connection terminal (D) and a second connection terminal (S), the control terminal (G) is used as the reset terminal RST' and is connected to the i-th reset and selection multiplexing line G-comb (i) among the n reset and selection multiplexing lines G-comb, and the first connection terminal (D) is connected to a third voltage SVSS; the driving transistor T2 has a control terminal (G), a first connection terminal (D) and a second connection terminal (S), the control terminal (G) is connected to the second connection terminal (S) of the reset transistor T1, the first connection terminal (D) is connected to a fourth voltage SVDD, and the second connection terminal (S) is used as the readout terminal RO' and is connected to the readout line RO; the optical sensing component (photo The optical sensor component PS has a first end and a second end, the first end is connected to the second connection end (S) of the reset transistor T1, and the second end is used as a selection end SEL' and is connected to the i-1th reset and selection multiplexing line G-comb (i-1) among the n reset and selection multiplexing lines G-comb; the capacitor C has two ends respectively connected to the control end (G) of the driving transistor T2 and the second end of the optical sensor component PS. In one embodiment, the capacitor C can be a capacitor structure formed by components inside the optical sensor component PS, but is not limited thereto.

[0059] Depend on Figure 5B It can be seen that the present invention can replace the original two reset lines RST and selection line SEL with a reset and selection multiplexing line G-comb, so it is possible to drive a pixel row by reducing one driving line, thereby improving the panel penetration rate. The reset and selection multiplexing lines G-comb (1), G-comb (2)...G-comb (n-1), G-comb (n) in the array of the entire fingerprint sensor are driven in sequence. When the reset and selection multiplexing line G-comb (i-1) is driven, the optical sensing component PS of the fingerprint pixel unit 21 of the i-th pixel row in the n pixel rows is powered to increase the voltage level of the selection terminal SEL', thereby turning on the driving transistor T2 to read out the fingerprint signal. Then, the reset and selection multiplexing line G-comb (i) is driven to turn on the reset transistor T1 of the fingerprint pixel unit 21 of the i-th pixel row in the n pixel rows to reset the level of the capacitor C, thereby achieving the effect of fingerprint sensing. In addition, at Figure 5BIn the figure, since the fingerprint pixel unit 21 maintains the same level of the reset and selection multiplexing lines G-comb(i-1) and G-comb(i) during the exposure time, when the exposure amount is large, the photocurrent of the optical sensing element PS is large, resulting in the terminal potential Vp of the capacitor C being very close to or even equal to the potential of the reset and selection multiplexing line G-comb, that is, the Vgs of the reset transistor T1 is close to 0V. In order to prevent the reset transistor T1 from being turned on during the exposure time, an additional gate can be added to the reset transistor T1, that is, as shown in the figure, the reset transistor T1 can be a top gate transistor and connected to a bottom gate (bottom gate, BG). By adjusting the voltage of the bottom gate (BG), the threshold voltage (Vth) of the reset transistor T1 can be adjusted to adjust the threshold voltage (Vth) to a preset ideal value without changing the process conditions, thereby ensuring that the reset transistor T1 will not be turned on during the exposure time.

[0060] Figure 6 Show the invention Figure 5A Schematic diagram of the fingerprint pixel unit 21 integrated into the display pixel unit 41, which shows that the display pixel unit 41 including the three RGB sub-pixels of the LCD integrates a fingerprint pixel unit 21, wherein the circuit area of ​​the fingerprint pixel unit 21 is configured in the lower area of ​​the three RGB sub-pixels, but this is only an example and not a limitation. It is conceivable that the circuit area of ​​the fingerprint pixel unit 21 can also be concentrated in the lower area of ​​a specific sub-pixel. In addition, this embodiment takes the LCD panel as an example, but the present invention is not limited to this. The present invention is also applicable to other types of panels such as OLED, or other types of pixel arrangements such as RGBW. Although the pixel unit 41 and the fingerprint pixel unit 21 shown in the figure belong to different pixel rows, they can also be classified as the same pixel row in other embodiments. In the present invention, the fingerprint pixel unit 21 is mainly configured between the RGB sub-pixels of multiple display pixel units 41. Whether they are in the same row can be adjusted according to design requirements and is not limited to this.

[0061] exist Figure 6 In the embodiment, the LTPS LCD process is used as an example, the display scan line G-disp and the reset and selection multiplexing line G-comb can be made of metal layer 1 (metal-1, M1). The data line 61 connecting the three RGB sub-pixels can be made of metal layer 2 (metal-2, M2). Figure 6Indicated as R(M2), G(M2) and B(M2), the function of these data lines 61 is to transmit display data to each display sub-pixel. In one embodiment, the reset and selection multiplexing line G-comb(i-1) can be transferred from M1 to other conductive layers, such as metal layer 0 (metal-0, M0) through a via 63, and then connected to the circuit area of ​​the fingerprint pixel unit 21 of the i-th row by the routing line 65 of the metal layer 0. In order not to affect the aperture ratio, the routing line 65 of the metal layer 0 can be arranged below the data line 61 and substantially overlap with the data line 61. In another embodiment, the conductive layer used for layer transfer can be metal layer 3 (metal-3, M3), and its routing line 65 is arranged above the data line 61 and extends along the data line 61 substantially overlapping.

[0062] Fig. 7A The present invention adopts Figure 5A The fingerprint display device of the present embodiment includes the functions of display, touch and fingerprint. Fig. 7A In the figure, DISP stands for display, TP stands for touch, FP stands for fingerprint sensing, Vb stands for vertical blanking, Hi-Z stands for high impedance, and FDR stands for full drive. Fig. 7A As shown, when fingerprint detection is not activated (FP off), display driving and touch sensing are performed in time sharing. In the display period (DISP), in order to reduce the capacitive load of the reset and selection multiplexing line G-comb on the data line 61, the reset and selection multiplexing line G-comb is set to high impedance (Hi-Z), that is, the reset and selection multiplexing line G-comb is not electrically connected to the voltage source and becomes a floating state, thereby reducing the capacitive load on the data line 61. However, the present invention is not limited to this. If the capacitive load of the data line 61 is within an acceptable range, the reset and selection multiplexing line G-comb can also be selected to be connected to a voltage source. In the touch sensing period (TP), the reset and selection multiplexing line G-comb can be fed with the same full drive signal as the touch sensing driving signal, that is, the voltage swing (voltage swing), phase and frequency of this full drive signal are substantially the same as the signal driving the touch sensing electrode, thereby reducing the load of the touch sensing electrode. When fingerprint detection is activated (FP on), in order to match the fingerprint detection and exposure time, the update frequency of the display data can be adjusted accordingly. In this embodiment, the update frequency is slowed down. During the fingerprint detection period, the reset and selection multiplexing lines G-comb are driven in sequence to achieve the aforementioned functions of reading fingerprint signals and resetting capacitors.

[0063] Figure 7B The present invention adopts Figure 5AAnother operation timing diagram of the fingerprint display device of the fingerprint pixel unit 21 is similar to Fig. 7A The difference is that: at an interval such as a vertical blanking (Vb) interval, the reset and selection multiplexing line G-comb is connected to a DC bias voltage (DC bias) to prevent the reset and selection multiplexing line G-comb from being in an unstable potential due to being in a floating state for a long time, or charge accumulation near the reset and selection multiplexing line G-comb.

[0064] Figure 8 Show the invention Figure 5B Schematic diagram of the fingerprint pixel unit 21 integrated into the display pixel unit 41, which shows that the display pixel unit 41 including the three RGB sub-pixels of the LCD integrates a fingerprint pixel unit 21, wherein the circuit area of ​​the fingerprint pixel unit 21 is configured in the lower area of ​​the three RGB sub-pixels, but this is only an example and not a limitation. It is conceivable that the circuit area of ​​the fingerprint pixel unit 21 can also be concentrated in the lower area of ​​a specific sub-pixel. In addition, this embodiment takes the LCD panel as an example, but the present invention is not limited to this. The present invention is also applicable to other types of panels such as OLED, or other types of pixel arrangements such as RGBW. Although the pixel unit 41 and the fingerprint pixel unit 21 shown in the figure belong to different pixel rows, they can also be classified as the same pixel row in other embodiments. In the present invention, the fingerprint pixel unit 21 is mainly configured between the RGB sub-pixels of multiple display pixel units 41. Whether they are in the same row can be adjusted according to design requirements and is not limited to this.

[0065] exist Figure 8 In the embodiment, the LTPS LCD process is used as an example, the display scan line G-disp and the reset and selection multiplexing line G-comb can be made of metal layer 1 (metal-1, M1). The data line 61 of the three RGB sub-pixels can be made of metal layer 2 (metal-2, M2). Figure 8Indicated as R(M2), G(M2) and B(M2), the function of these data lines 61 is to transmit display data to each display sub-pixel. In one embodiment, the reset and selection multiplexing line G-comb(i-1) can be transferred from metal layer 1 to other conductive layers, such as metal layer 0 (metal-0, M0) through a via 63, and then connected to the circuit area of ​​the fingerprint pixel unit 21 of the i-th row by the routing line 65 of metal layer 0. In order not to affect the aperture ratio, this metal layer 0 routing line 65 can be designed below the data line 61 and overlap with the data line 61. In addition, the bottom gate line 81 connected to the bottom gate (BG) of the reset transistor T1 can be made of metal layer 0 and arranged below the data line 61 and overlap with the data line 61. In another embodiment, the above-mentioned conductive layer for layer transfer can be metal layer 3 (metal-3, M3), and its routing line 65 is arranged above the data line 61 and extends along the data line 61 in a substantially overlapping manner.

[0066] Fig. 9 The schematic diagram of the wiring of the bottom gate line 81 of the reset transistor T1 on the panel 31 is shown, wherein, outside the display area (active area) 311 of the panel 31, the bottom gate line 81 is connected to a bottom gate bias voltage V-BG via a switch 91, and the switch 91 is controlled by a switch signal SW-BG to be turned on or off. Because the bottom gate line 81 overlaps with the data line 61, during the display data writing period, the switch 91 is turned off to make the bottom gate line 81 floating, which can reduce the capacitive load of the data line 61. During the fingerprint detection period, the switch 91 is turned on to connect the bottom gate line 81 to the bottom gate bias voltage V-BG, so that the threshold voltage (Vth) of the reset transistor T1 can be adjusted by the bottom gate bias voltage V-BG to prevent the reset transistor T1 from leaking during the exposure time. In one embodiment, the switch 91 can also be omitted, for example, if the capacitive load is within an acceptable range, the switch 91 can be omitted.

[0067] Fig.10 The present invention shows that Figure 5B The fingerprint pixel unit 21 of the present embodiment has the following operation timing diagram: the fingerprint display device of the present embodiment includes the functions of display, touch control and fingerprint. Fig.10 In the figure, DISP stands for display, TP stands for touch, FP stands for fingerprint sensing, and Vb stands for vertical blanking. Fig.10As shown, in case 1, during the display and touch period, the switch signal SW-BG maintains a low level to disconnect the switch 91, so as to achieve the above-mentioned bottom gate line 81 to be kept floating and reduce the load of the data line 61, and during the fingerprint detection period, the switch signal SW-BG is cut to a high level to bias the bottom gate line 81 to the bottom gate bias voltage V-BG, thereby adjusting the threshold voltage (Vth) of the reset transistor T1. In case 2, it is the same as the driving in case 1, but during a period of time such as the vertical blanking (Vb) interval, the level of the bottom gate line 81 is updated to the bottom gate bias voltage V-BG to avoid the potential drift and charge accumulation caused by the long-term floating of the bottom gate line 81. In case 3, it is the same as the driving in case 2, but during the touch period, the switch signal SW-BG is cut to a high level to turn on the switch 91, wherein the bottom gate bias voltage V-BG is the same full-drive signal as the touch sensing drive signal, that is, the voltage swing, phase and frequency of the full-drive signal are substantially the same as the signal driving the touch sensing electrode, thereby reducing the load of the touch sensing electrode.

[0068] Fig.11A A circuit diagram of the fingerprint pixel unit 23 of the i-th pixel row among the n pixel rows according to another embodiment of the present invention is shown. The components of the fingerprint pixel unit 23 are the same as those of Figure 5AThe fingerprint pixel unit 21 is a fingerprint pixel unit 21, but a reset switch transistor SW-RST is added. As shown in the figure, the optical sensing component PS has a first end e1 and a second end e2 connected to a bias voltage Vbias; the capacitor C has two ends respectively connected to the first end e1 and the second end e2 of the optical sensing component PS, and the capacitor C can be a capacitor structure formed by the components inside the optical sensing component PS; the reset transistor T1 has a first connection end (D), a second connection end (S), and a control end (G) as the reset end RST' and is connected to the i-th reset and selection multiplexing line G-comb (i) among the n reset and selection multiplexing lines G-comb; the reset switch transistor SW-RST has a first connection end (D), a second connection end (S), and a control end (G) connected to a reset switch control line G-RST, wherein the reset transistor T1 and the reset switch transistor SW-RST are connected in series to the first voltage VDD1 and the optical sensing component PS through their respective connection ends. The driving transistor T2 has a control terminal (G) connected to the first terminal e1 of the optical sensing element PS, a first connection terminal (D) connected to the second voltage VDD2, and a second connection terminal (S), wherein the first voltage VDD1 and the second voltage VDD2 can be the same DC voltage source or different DC voltage sources; the selection transistor T3 has a control terminal (G) as a selection terminal SEL' and connected to the i-1th reset and selection multiplexing line G-comb (i-1) among the n reset and selection multiplexing lines, a first connection terminal (D) connected to the second connection terminal (S) of the driving transistor T2, and a second connection terminal (S) as a readout terminal RO' and connected to the readout line RO; in addition, the control terminal (G) of the load transistor T4 is connected to the fifth voltage VB, and its two connection terminals (D, S) are respectively connected to the readout line RO and the sixth voltage VSS. Specifically, the second connection terminal (S) of the reset transistor T1 is connected to the first terminal e1 of the optical sensing component PS, the first connection terminal (D) of the reset transistor T1 is connected to the second connection terminal (S) of the reset switch transistor SW-RST, and the first connection terminal (D) of the reset switch transistor SW-RST is connected to the first voltage VDD1.

[0069] Fig. 11B Another circuit diagram of the fingerprint pixel unit 23 of the i-th pixel row among the n pixel rows according to another embodiment of the present invention is shown. The components of the fingerprint pixel unit 23 are the same as those of Figure 5BThe fingerprint pixel unit 21 is a fingerprint pixel unit 21, but a reset switch transistor SW-RST is added. As shown in the figure, the optical sensing component PS has a first end e1 and a second end e2 as a selection end SEL' and is connected to the i-1th reset and selection multiplexing line G-comb (i-1) among the n reset and selection multiplexing lines G-comb; the capacitor C has two ends respectively connected to the first end e1 and the second end e2 of the optical sensing component PS, and this capacitor C can be a capacitor structure formed by the components inside the optical sensing component PS itself, but is not limited to this; the reset transistor T1 has a first connection end (D), a second connection end (S), and a control end (G) as a reset end RST' and is connected to the i-th reset and selection multiplexing line G-comb (i) among the n reset and selection multiplexing lines G-comb; the reset The switch transistor SW-RST has a control terminal (G) connected to a reset switch control line G-RST, a first connection terminal (D), and a second connection terminal (S), wherein the reset transistor T1 and the reset switch transistor SW-RST are connected in series between the third voltage SVSS and the first terminal e1 of the optical sensing element PS via their respective connection terminals; the driving transistor T2 has a control terminal (G) connected to the first terminal e1 of the optical sensing element PS, a first connection terminal (D) connected to the fourth voltage SVDD, and a second connection terminal (S) as a readout terminal RO' and connected to the readout line RO; in addition, the control terminal (G) of the load transistor T4 is connected to the fifth voltage VB, and its first connection terminal (D) is connected to the readout line RO. Specifically, the second connection terminal (S) of the reset transistor T1 is connected to the first terminal e1 of the optical sensing element PS, the first connection terminal (D) of the reset transistor T1 is connected to the second connection terminal (S) of the reset switch transistor SW-RST, and the first connection terminal (D) of the reset switch transistor SW-RST is connected to the third voltage SVSS.

[0070] Fig.12 Show the invention Fig.11A Schematic diagram of fingerprint pixel unit 23 integrated into display pixel unit 41, which shows that display pixel unit 41 including three RGB sub-pixels of LCD integrates a fingerprint pixel unit 23, wherein the circuit area of ​​fingerprint pixel unit 23 is configured in the lower area of ​​three RGB sub-pixels, but this is only an example and not a limitation, and it is conceivable that the circuit area of ​​fingerprint pixel unit 23 can also be concentrated in the lower area of ​​a specific sub-pixel. In addition, this embodiment takes LCD panel as an example, but the present invention is not limited to this, and the present invention can also be applied to other types of panels such as OLED, or other types of pixel arrangements such as RGBW.

[0071] exist Fig.12In the embodiment, the LTPS LCD process is used as an example, the display scan line G-disp and the reset and selection multiplexing line G-comb can be made of metal layer 1 (metal-1, M1). The data line 61 connecting the three RGB sub-pixels can be made of metal layer 2 (metal-2, M2). Figure 6 Indicated as R(M2), G(M2) and B(M2), the function of these data lines 61 is to transmit display data to each display sub-pixel. In one embodiment, the reset and selection multiplexing line G-comb(i-1) can be transferred from M1 to other conductive layers, such as metal layer 0 (metal-0, M0) through a via 63, and then connected to the circuit area of ​​the fingerprint pixel unit 23 of the i-th row by the routing line 65 of the metal layer 0. In order not to affect the aperture ratio, the routing line 65 of the metal layer 0 can be arranged below the data line 61 and substantially overlap with the data line 61. In another embodiment, the conductive layer used for layer transfer can be metal layer 3 (metal-3, M3), and its routing line 65 is arranged above the data line 61 and extends along the data line 61 substantially overlapping. The reset switch control trace G-RST can also be made of metal layer 0 (metal-0, M0) or metal layer 3 (metal-3, M3) and set to overlap with the data line 61, so that the aperture ratio will not be affected by the introduction of the reset switch control trace G-RST. Fig. 11B The fingerprint pixel unit 23 is integrated into the display pixel unit 41 similarly to the above Fig.12 , so I will not go into details.

[0072] Fig.13 A schematic diagram of a circuit showing a reset switch control trace G-RST in the display area 71 of the panel 31 and its periphery, wherein the reset switch control trace G-RST is connected to the reset voltage V-RST via the first switch SW1. For the convenience of control, each first switch SW1 can be connected to the same reset switch control signal V-SW-RST, wherein the reset switch control signal V-SW-RST and the reset voltage V-RST are generated by Figure 3 The integrated integrated circuit 39 in FIG. 3 is provided. Since the reset switch control line G-RST overlaps with the data line, when its RC load is large, it is necessary to use the aforementioned first switch SW1 to avoid the influence of the load, that is, the first switch SW1 is closed in the display interval to make the reset switch control line G-RST floating, and when the fingerprint detection action is performed, the first switch SW1 is opened; and when the RC load is within an acceptable range, the voltage can be directly applied to the reset switch control line G-RST without setting the first switch SW1.

[0073] With the aforementioned Fig.11A or Fig. 11BThe fingerprint pixel unit 23 performs display and fingerprint sensing operations similar to Figure 5A or 5B fingerprint pixel unit 21, but can be further used Figure 3 The integrated integrated circuit 39 is connected or disconnected through the reset switch control line G-RST to further adjust the exposure time. When the reset switch transistor SW-RST is turned on and the fingerprint pixel unit 23 is as if there is no reset switch transistor SW-RST, the reset and selection multiplexing line G-comb(i-1) is turned on (that is, the selection end SEL' is turned on), and then the reset and selection multiplexing line G-comb(i) is turned on (that is, the reset end RST' is turned on). When the reset switch control line G-RST is used to disconnect the reset switch transistor SW-RST, the reset transistor T1 is not activated, causing the capacitor C to discharge. Since the added reset switch transistor SW-RST can determine whether the storage capacitor C is reset, the exposure time can be adjusted.

[0074] From the above description, it can be seen that the reset line RST and the select line SEL based on the optical fingerprint sensor are the main reasons for the reduction of the aperture ratio of the embedded fingerprint display panel. In the fingerprint display device and the integrated circuit and method for driving the same of the present invention, by integrating the reset line and the select line into a reset and select multiplexing line, the aperture ratio of the above panel can be effectively improved, and the fingerprint sensing effect can be achieved at the same time.

[0075] The above embodiments are merely examples for the convenience of description. The scope of rights claimed by the present invention should be based on the claims, but not limited to the above embodiments.

Claims

1. A fingerprint display device having a plurality of pixel rows, wherein each of n pixel rows of the plurality of pixel rows has a plurality of display pixel units and a plurality of fingerprint pixel units, n being an integer greater than 1, and the n pixel rows are driven by corresponding n display scan lines and n reset and selection multiplexing lines for display and fingerprint sensing, characterized in that: Each fingerprint pixel unit has a reset end and a selection end, the reset end of the fingerprint pixel unit of the i-th pixel row among the n pixel rows is connected to the i-th reset and selection multiplexing line among the n reset and selection multiplexing lines, and the selection end of the fingerprint pixel unit of the i-th pixel row among the n pixel rows is connected to the i-1-th reset and selection multiplexing line among the n reset and selection multiplexing lines, where i is any integer between 1 and n.

2. The fingerprint display device according to claim 1, characterized in that: The fingerprint pixel unit of the i-th pixel row among the n pixel rows comprises: a reset transistor having a control terminal as the reset terminal and connected to the i-th reset and selection multiplexing line among the n reset and selection multiplexing lines, a first connection terminal connected to a first voltage, and a second connection terminal; a driving transistor having a control terminal connected to the second connection terminal of the reset transistor, a first connection terminal connected to a second voltage, and a second connection terminal; a selection transistor having a control terminal as the selection terminal and connected to the (i-1)th reset and selection multiplexing line among the n reset and selection multiplexing lines, a first connection terminal connected to the second connection terminal of the driving transistor, and a second connection terminal; An optical sensing element having two ends respectively connected to the second connection terminal of the reset transistor and a bias voltage; and A capacitor has two ends respectively connected to the control end of the driving transistor and the bias voltage.

3. The fingerprint display device according to claim 2, characterized in that: The second connection terminal of the selection transistor serves as a readout terminal and is connected to a readout line. The readout terminals of the fingerprint pixel units located in the same column are connected to a load transistor and share the load transistor. The load transistor has a control terminal connected to a fifth voltage, a first connection terminal connected to the readout line, and a second connection terminal connected to a sixth voltage.

4. The fingerprint display device according to claim 2, characterized in that: The reset and selection multiplexing lines are driven sequentially. When the i-1th reset and selection multiplexing line among the n reset and selection multiplexing lines is driven, the selection transistor of the fingerprint pixel unit of the i-th pixel row among the n pixel rows is turned on to read out the fingerprint signal. Then, the i-th reset and selection multiplexing line among the n reset and selection multiplexing lines is driven to turn on the reset transistor of the fingerprint pixel unit of the i-th pixel row among the n pixel rows to reset the level of the capacitor.

5. The fingerprint display device according to claim 3, characterized in that: The plurality of pixel units are arranged on a panel, and an integrated integrated circuit controls a display-driven GOA circuit to sequentially drive the display scan lines for display, and controls a fingerprint-sensing-driven GOA circuit to sequentially drive the reset and selection multiplexing lines for fingerprint sensing, wherein the sensed fingerprint data is read out by the readout line to the integrated integrated circuit for fingerprint recognition.

6. The fingerprint display device according to claim 5, characterized in that: The panel senses the touch of the user's finger and transmits a touch signal to the integrated integrated circuit to provide a touch sensing function.

7. The fingerprint display device according to claim 2, characterized in that: The display scan line and the reset and selection multiplexing line are made of metal layer 1, and the data line connecting the sub-pixels of the display pixel unit is made of metal layer 2. The i-1th reset and selection multiplexing line among the n reset and selection multiplexing lines is transferred from metal layer 1 to metal layer 0 or metal layer 3 via a through hole, and then connected to the fingerprint pixel unit of the i-th row among the n pixel rows by the routing of metal layer 0 or metal layer 3, among which the routing of metal layer 0 or metal layer 3 is set to overlap with the data line.

8. The fingerprint display device according to claim 6, characterized in that: When fingerprint detection is not activated, display driving and touch sensing are performed on the panel in a time-sharing manner. When display driving is performed, the reset and selection multiplexing lines are set to high impedance. When touch sensing is performed, a full drive signal identical to the touch sensing driving signal is sent to the reset and selection multiplexing lines. When fingerprint detection is performed, the reset and selection multiplexing lines are driven sequentially.

9. The fingerprint display device according to claim 8, characterized in that: During a period of time between vertical blanking intervals, the reset and select multiplexing lines are connected to a DC bias voltage.

10. The fingerprint display device according to claim 1, characterized in that: The fingerprint pixel unit of the i-th pixel row among the n pixel rows comprises: a reset transistor having a control terminal as the reset terminal and connected to the i-th reset and selection multiplexing line among the n reset and selection multiplexing lines, a first connection terminal connected to a third voltage, and a second connection terminal; a driving transistor having a control terminal connected to the second connection terminal of the reset transistor, a first connection terminal connected to a fourth voltage, and a second connection terminal; an optical sensing element having a first terminal connected to the second connection terminal of the reset transistor, and a second terminal as a selection terminal and connected to the i-1th reset and selection multiplexing line among the n reset and selection multiplexing lines; and A capacitor has two ends respectively connected to the control end of the driving transistor and the second end of the optical sensing element.

11. The fingerprint display device according to claim 10, characterized in that: The reset transistor is connected to a bottom gate.

12. The fingerprint display device according to claim 10, characterized in that: The second connection terminal of the driving transistor serves as a readout terminal and is connected to a readout line. The readout terminals of the fingerprint pixel units located in the same column are connected to a load transistor and share the load transistor. The load transistor has a control terminal connected to a fifth voltage, a first connection terminal connected to the readout line, and a second connection terminal.

13. The fingerprint display device according to claim 10, characterized in that: The reset and selection multiplexing lines are driven sequentially. When the i-1th reset and selection multiplexing line among the n reset and selection multiplexing lines is driven, power is supplied to the optical sensing element of the fingerprint pixel unit of the i-th pixel row among the n pixel rows to increase the voltage level of the selection end, thereby turning on the driving transistor to read out the fingerprint signal, and then the i-th reset and selection multiplexing line among the n reset and selection multiplexing lines is driven to turn on the reset transistor of the fingerprint pixel unit of the i-th pixel row among the n pixel rows to reset the level of the capacitor.

14. The fingerprint display device according to claim 12, characterized in that: The plurality of pixel units are arranged on a panel, and an integrated integrated circuit controls a display-driven GOA circuit to sequentially drive the display scan lines for display, and controls a fingerprint-sensing-driven GOA circuit to sequentially drive the reset and selection multiplexing lines for fingerprint sensing, wherein the sensed fingerprint data is read out by the readout line to the integrated integrated circuit for fingerprint recognition.

15. The fingerprint display device according to claim 14, characterized in that: The panel senses the touch of the user's finger and transmits a touch signal to the integrated integrated circuit to provide a touch sensing function.

16. The fingerprint display device according to claim 11, characterized in that: The display scan line and the reset and selection multiplexing line are made of metal layer 1, and the data line connecting the sub-pixels of the display pixel unit is made of metal layer 2. The i-1th reset and selection multiplexing line among the n reset and selection multiplexing lines is transferred from metal layer 1 to metal layer 0 or metal layer 3 via a through hole, and then connected to the fingerprint pixel unit of the i-th pixel row among the n pixel rows by the routing of metal layer 0 or metal layer 3, among which the routing of metal layer 0 or metal layer 3 is set to overlap with the data line, and the bottom gate line connected to the bottom gate connected to the reset transistor is made of metal layer 0 or metal layer 3 and is set to overlap with the data line.

17. The fingerprint display device according to claim 16, characterized in that: The bottom gate line is connected to a bottom gate bias voltage via a switch. During a display data writing period, the switch is turned off to make the bottom gate line floating. During a fingerprint detection period, the switch is turned on to connect the bottom gate line to the bottom gate bias voltage.

18. The fingerprint display device according to claim 17, characterized in that: During a period of time in the vertical blanking interval, the potential of the bottom gate line is updated to the bottom gate bias voltage.

19. The fingerprint display device according to claim 17, characterized in that: During a touch period, the switch is turned on and the bottom gate bias voltage is the same as the full drive signal carrier of the touch sensing driving signal.

20. The fingerprint display device according to claim 1, characterized in that: The fingerprint pixel unit of the i-th pixel row among the n pixel rows comprises: An optical sensing element having a first end and a second end connected to a bias voltage; A capacitor having two ends respectively connected to a first end and a second end of the optical sensing component; a reset transistor having a control terminal as the reset terminal and connected to the i-th reset and selection multiplexing line among the n reset and selection multiplexing lines, a first connection terminal, and a second connection terminal; a reset switch transistor having a control terminal connected to a reset switch control trace, a first connection terminal, and a second connection terminal, wherein the reset transistor and the reset switch transistor are connected in series between a first voltage and the first terminal of the optical sensing component; a driving transistor having a control terminal connected to the first terminal of the optical sensing element, a first connection terminal connected to a second voltage, and a second connection terminal; and A selection transistor has a control end as the selection end and connected to the i-1th reset and selection multiplexing line among the n reset and selection multiplexing lines, a first connection end connected to the second connection end of the driving transistor T2, and a second connection end.

21. The fingerprint display device according to claim 20, characterized in that: The second connection terminal of the selection transistor serves as a readout terminal and is connected to a readout line. The readout terminals of the fingerprint pixel units located in the same column are connected to a load transistor and share the load transistor. The load transistor has a control terminal connected to a fifth voltage, a first connection terminal connected to the readout line, and a second connection terminal connected to a sixth voltage.

22. The fingerprint display device according to claim 20, characterized in that: The second connection terminal of the reset transistor is connected to the first terminal of the optical sensing component, the first connection terminal of the reset transistor is connected to the second connection terminal of the reset switch transistor, and the first connection terminal of the reset switch transistor is connected to the first voltage.

23. The fingerprint display device according to claim 20, characterized in that: The reset switch transistor is controlled by a reset switch control wiring to determine whether the capacitor is reset to adjust the exposure time.

24. The fingerprint display device according to claim 1, characterized in that: The fingerprint pixel unit of the i-th pixel row among the n pixel rows comprises: an optical sensing element having a first end and a second end as selection ends and connected to the i-1th reset and selection multiplexing line among the n reset and selection multiplexing lines; A capacitor having two ends respectively connected to a first end and a second end of the optical sensing component; a reset transistor T1 having a control terminal as the reset terminal and connected to the i-th reset and selection multiplexing line among the n reset and selection multiplexing lines, a first connection terminal, and a second connection terminal; a reset switch transistor having a control terminal connected to a reset switch control trace, a first connection terminal, and a second connection terminal, wherein the reset transistor and the reset switch transistor are connected in series between a third voltage and the first terminal of the optical sensing component; and A driving transistor has a control terminal connected to the first terminal of the optical sensing element, a first connection terminal connected to a fourth voltage, and a second connection terminal.

25. The fingerprint display device according to claim 24, characterized in that: The second connection terminal of the driving transistor serves as a readout terminal and is connected to a readout line. The readout terminals of the fingerprint pixel units located in the same column are connected to a load transistor and share the load transistor. The load transistor has a control terminal connected to a fifth voltage, a first connection terminal connected to the readout line, and a second connection terminal.

26. The fingerprint display device according to claim 24, characterized in that: The second connection terminal of the reset transistor is connected to the first terminal of the optical sensing component, the first connection terminal of the reset transistor is connected to the second connection terminal of the reset switch transistor, and the first connection terminal of the reset switch transistor is connected to the third voltage.

27. The fingerprint display device according to claim 24, characterized in that: The reset switch transistor SW-RST is controlled by the reset switch control wiring to determine whether the capacitor is reset to adjust the exposure time.

28. A method for driving a fingerprint display device, the fingerprint display device having a plurality of pixel rows, each of n pixel rows of the plurality of pixel rows having a plurality of display pixel units and a plurality of fingerprint pixel units, n being an integer greater than 1, the n pixel rows being driven by at least corresponding n display scan lines and n reset and selection multiplexing lines for display and fingerprint sensing, each fingerprint pixel unit having a reset terminal and a selection terminal, the method comprising: The n reset and selection multiplexing lines are driven sequentially, characterized in that: When driving the i-1th reset and selection multiplexing line among the n reset and selection multiplexing lines, the reset end of the fingerprint pixel unit of the i-1th pixel row among the n pixel rows is activated and the selection end of the fingerprint pixel unit of the i-th pixel row among the n pixel rows is activated, where i is any integer between 1 and n.

29. An integrated integrated circuit for controlling the fingerprint display device as claimed in claim 1, 2, 10, 20 or 24 to sequentially drive the display scan lines for display and sequentially drive the reset and selection multiplexing lines for fingerprint sensing.

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