Electronic circuit with display driving, touch sensing and fingerprint sensing functions

Abstract

The present invention provides an electronic circuit with display driving, touch sensing, and fingerprint sensing functions. The electronic circuit is suitable for driving a display panel including a touch sensor and a fingerprint sensor. The electronic circuit includes a switching circuit and a control circuit. The switching circuit includes a plurality of first switching elements and a plurality of second switching elements. The control circuit is configured to generate a control signal for controlling the switching circuit to control the electronic circuit to transmit a display driving signal from the first circuit to a data line via a first portion of the first switching element during a first time interval, and to control the electronic circuit to receive a fingerprint sensing signal from the fingerprint sensor of the display panel via the second switching element during a second time interval.

Description

Technical Field

[0001] The present invention relates to an electronic circuit, an electronic device, and a display panel, and more particularly, to an electronic circuit suitable for driving a display panel including a touch sensor and a fingerprint sensor, and to an electronic device including the electronic circuit and the display panel. Background Art

[0002] In recent years, the demand for fingerprint sensing has gradually increased. In order to reduce the size of electronic devices, the fingerprint sensing area may overlap with the display area of ​​the electronic device. For example, the under-display fingerprint identification technique is to embed the fingerprint sensor into the display panel, and the fingerprint sensor can sense or obtain the fingerprint image through the display panel. When a touch event such as fingerprint recognition occurs, the touch sensing circuit can report it to the application processor of the electronic device via a designated interface. Subsequently, the application processor further controls the display driving circuit to drive the display panel to display an image for fingerprint sensing. On the other hand, the application processor further controls the fingerprint sensing circuit to perform a fingerprint sensing operation. After the fingerprint sensing operation, the fingerprint sensing circuit transmits the sensing information to the application processor for fingerprint recognition, and then the application processor completes the fingerprint recognition based on the sensing information.

[0003] However, for an electronic circuit capable of driving a display panel to perform display operations, touch sensing operations, and fingerprint sensing operations, multiple input and output (I / O) nodes and complex wiring may be required between the electronic circuit and the display panel for signal transmission. The multiple I / O nodes and complex wiring will increase the width of the fan-out area corresponding to the electronic circuit and the size of the frame boundary of the display panel near the electronic circuit.

[0004] On the other hand, the display panel may be equipped with multiple multiplexers to receive display data from the electronic circuit. For example, if the display panel includes red, green, and blue pixels, the multiplexer is designed as a 1:3 multiplexer to receive red, green, and blue display data from the electronic circuit. However, for some applications, the display panel may include red, green, blue, and white pixels, and therefore the multiplexer is designed as a 1:4 multiplexer to receive red, green, blue, and white display data from the electronic circuit. In this case, the resolution of the fingerprint image may be reduced. Summary of the Invention

[0005] The present invention is directed to an electronic circuit, an electronic device, and a display panel, wherein the width of the fan-out area of ​​the electronic circuit corresponds to the size of the frame boundary near the electronic circuit in the display panel. In addition, the resolution of the fingerprint image can be maintained.

[0006] An embodiment of the present invention provides an electronic circuit suitable for driving a display panel including a touch sensor and a fingerprint sensor. The electronic circuit includes a first circuit, a second circuit, a first switching circuit, and a control circuit. The first circuit is configured to generate a display drive signal for driving a data line of the display panel. The second circuit is configured to receive a fingerprint sensing signal corresponding to a fingerprint image from the fingerprint sensor. The first switching circuit includes a plurality of first switching elements and a plurality of second switching elements. The first switching element is coupled to the first circuit, and the second switching element is coupled to the second circuit. The control circuit is configured to generate a control signal for controlling the first switching circuit to control the electronic circuit to transmit the display drive signal from the first circuit to the data line through the first part of the first switching element in a first time interval, and to control the electronic circuit to receive the fingerprint sensing signal from the fingerprint sensor of the display panel through the second switching element in a second time interval.

[0007] An embodiment of the present invention provides a display panel comprising a plurality of pixels and touch sensors, a plurality of data lines, a plurality of fingerprint sensors, a plurality of fingerprint sensing lines, and a switching circuit. The data lines are coupled to the pixels and configured to receive display drive signals. The fingerprint sensors are configured to sense a fingerprint image and generate fingerprint sensing signals corresponding to the fingerprint images. The fingerprint sensing lines are coupled to the fingerprint sensors and configured to transmit the fingerprint sensing signals. The switching circuit comprises a plurality of first switching units and a plurality of second switching units. The first switching units are coupled to the data lines and a first portion of the fingerprint sensing lines, and the second switching units are coupled to a second portion of the fingerprint sensing lines. The first switching units are switched to receive the display drive signals from the electronic circuit in a first time interval, and the first switching units and the second switching units are switched to transmit the fingerprint sensing signals to the electronic circuit in a second time interval.

[0008] An embodiment of the present invention provides an electronic device comprising a display panel and an electronic circuit. The display panel comprises a touch sensor and a fingerprint sensor. The electronic circuit can be configured to be coupled to the display panel and is adapted to drive the display panel with a display drive signal and receive a fingerprint sensing signal corresponding to a fingerprint image from the fingerprint sensor. The electronic circuit comprises a first switching circuit. The first switching circuit comprises a plurality of first switching elements and a plurality of second switching elements. The electronic circuit generates a control signal for controlling the first switching circuit so as to transmit the display drive signal to the display panel via a first portion of the first switching element in a first time interval and receive the fingerprint sensing signal from the fingerprint sensor via the second switching element in a second time interval.

[0009] In order to make the foregoing content easier to understand, several embodiments are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

[0011] Figure 1 is a schematic block diagram illustrating an electronic device according to an embodiment of the present invention.

[0012] Figure 2 It shows Figure 1 Schematic diagram of the display panel shown in .

[0013] Figure 3 It shows Figure 1 Schematic block diagram of the electronic circuit shown in .

[0014] Figure 4 、 Figure 5A as well as Figure 5B is a schematic diagram illustrating a wiring structure between an electronic circuit and a display panel according to an embodiment of the present invention.

[0015] Figure 6 FIG. 1 is a schematic diagram illustrating a wiring structure between an electronic circuit and a display panel according to another embodiment of the present invention.

[0016] Figure 7 is a schematic diagram illustrating a fan-out area corresponding to an electronic circuit according to an embodiment of the present invention.

[0017] Figure 8 is a schematic diagram illustrating a fan-out area corresponding to an electronic circuit in the related art.

[0018] Figure 9 is a schematic diagram showing a wiring structure of an electronic circuit according to an embodiment of the present invention.

[0019] Figure 10 is a schematic diagram illustrating operation of a display panel for fingerprint sensing according to an embodiment of the present invention.

[0020] Figure 11 is a schematic diagram showing a wiring structure of an electronic circuit according to another embodiment of the present invention.

[0021] Figure 12 FIG. 1 is a schematic diagram showing the detailed structure of a fingerprint sensor according to an embodiment of the present invention.

[0022] Explanation of Figure Numbers

[0023] 11, 110: electronic circuits;

[0024] 91, 910: fan-out area;

[0025] 100: electronic device;

[0026] 111: Part I;

[0027] 112: display driving circuit;

[0028] 113: Part II;

[0029] 114: touch sensing circuit;

[0030] 116: fingerprint sensing circuit;

[0031] 119: Wire grouping circuit;

[0032] 120: display panel;

[0033] 121: timing controller;

[0034] 122: display pixels;

[0035] 122_1, 122_2, 122_3, 122_4: pixels;

[0036] 123: other controllers or processors;

[0037] 124: touch sensor;

[0038] 125. MUX2_1: first switch unit;

[0039] 127. MUX2_2: second switch unit;

[0040] 126: fingerprint sensor;

[0041] 130: control circuit;

[0042] 140: transmission line;

[0043] 141: touch controller;

[0044] 161: Digital circuits;

[0045] 163: Analog front-end circuit;

[0046] 401, 402, 403, 404: fingerprint sensing area;

[0047] 501: first switching element;

[0048] 502: second switching element;

[0049] 502_1: first switch device;

[0050] 502_2: second switch device;

[0051] 503: a third switching element;

[0052] 504: fourth switching element;

[0053] 505: fifth switching element;

[0054] B: blue sub-pixel;

[0055] BPT: bypass transistor;

[0056] DAC: signal converter;

[0057] FPI_1, FPI_2, FPI_3, FPI_4: fingerprint images;

[0058] FSL: fingerprint sensing line;

[0059] G: green sub-pixel;

[0060] GDL: Display scan lines;

[0061] GND, VDD: system voltage;

[0062] GSL: fingerprint scanning line;

[0063] MUX1: switch unit;

[0064] N1D, N1F: first terminal;

[0065] N2: second terminal;

[0066] N3D, N3F: third terminal;

[0067] N4: fourth terminal;

[0068] N5F: fifth terminal;

[0069] N6: sixth terminal;

[0070] PD: photodiode;

[0071] R: red sub-pixel;

[0072] RST: reset transistor;

[0073] RSTc, SELc, SW13FP, SW1FP, SW1SD, SW2B, SW2FP, SW2G, SW2R, SW2W, SW3FP, TXc: control signals;

[0074] S1: touch sensing signal;

[0075] S2: display drive signal;

[0076] S3: fingerprint sensing signal;

[0077] S7: synchronous driving signal;

[0078] SDL: display data line;

[0079] SEL: row select transistor;

[0080] SOP: output buffer;

[0081] SW1, SW2: switch circuit;

[0082] TSA: touch area;

[0083] TSL: touch sensing line;

[0084] TX: transfer transistor;

[0085] W: white sub-pixel;

[0086] W0, W1: width. DETAILED DESCRIPTION

[0087] The following embodiments are provided to describe the present disclosure in detail, but the present disclosure is not limited to the provided embodiments, and the provided embodiments can be appropriately combined. The terms "coupling / coupled" or "connecting / connected" used in this specification (including claims) of this application may refer to any direct or indirect connection method. For example, "a first device is coupled to a second device" should be interpreted as "the first device is directly connected to the second device" or "the first device is indirectly connected to the second device through other devices or connecting members". The term "signal" may refer to current, voltage, charge, temperature, data, electromagnetic waves or any one or more signals. In addition, the term "and / or" may refer to "at least one of". For example, "a first signal and / or a second signal" should be interpreted as "at least one of the first signal and the second signal".

[0088] Figure 1 1 is a schematic block diagram showing an electronic device according to an embodiment of the present invention. Figure 1 The electronic device 100 of this embodiment includes an electronic circuit 110 and a display panel 120. The display panel 120 includes a touch sensor and a fingerprint sensor. The electronic circuit 110 can be configured to be coupled to the display panel 120. The electronic circuit 110 is suitable for driving the display panel 120.

[0089] In this embodiment, the electronic device 100 may be an electronic device with a display function, a touch sensing function, and a fingerprint sensing function. In one embodiment, the electronic device 100 may be, but is not limited to, a smartphone, a non-smartphone, a wearable electronic device, a tablet computer, a personal digital assistant, a notebook computer, or other independently operable portable electronic device with a display function, a touch sensing function, and a fingerprint sensing function. In one embodiment, the electronic device 100 may be, but is not limited to, a portable or non-portable electronic device in a vehicle intelligent system. In one embodiment, the electronic device 100 may be, but is not limited to, a smart home appliance, such as a television, a computer, a refrigerator, a washing machine, a telephone, an induction cooker, a desk lamp, etc.

[0090] Figure 2 It shows Figure 1 Schematic diagram of the display panel shown in . Figure 2 , the display panel 120 of this embodiment includes a plurality of display pixels 122, a plurality of touch sensors 124, and a plurality of fingerprint sensors 126. The electronic circuit 110 drives and controls the display panel 120 to perform display operations, touch sensing operations, and fingerprint sensing operations. Specifically, the electronic circuit 110 drives and controls the display pixels 122 to display images via the display scan lines GDL and the display data lines SDL. The electronic circuit 110 also drives and controls the touch sensors 124 to sense touch events of the display panel 120 via the touch scan lines and the touch sensing lines TSL. In one embodiment, the touch sensors 124 may be touch sensing electrodes in the touch sensing phase, and the touch sensors 124 may be common electrodes in the display phase. In this embodiment, as Figure 2 As shown, the touch sensor 124 of the display panel 120 may be an in-cell touch sensor. For an in-cell touch sensor, the display panel 120 inherently does not have a touch scan line, and the touch drive signal may be directly transmitted to the touch sensor 124 via the touch sensing line TSL. For other types of touch sensors, the display panel 120 may have a touch scan line for transmitting the touch drive signal. Figure 2 In the embodiment of the present invention, the touch sensing line TSL is further configured to transmit a touch driving signal from the electronic circuit 110. The electronic circuit 110 also drives and controls the fingerprint sensor 126 to sense a fingerprint image on the display panel 120 via the fingerprint scanning line GSL and the fingerprint sensing line FSL.

[0091] In one embodiment, the display panel 120 may be an in-cell fingerprint, touch, and display panel in which a fingerprint sensor and a touch sensor are embedded, but the present invention is not limited thereto. In one embodiment, the electronic circuit 110 may drive and control the electronic device 100 to perform an in-display fingerprint recognition operation, i.e., a fingerprint identification operation. In one embodiment, the fingerprint sensor 126 may be an optical fingerprint sensor.

[0092] Figure 3 It shows Figure 1 Schematic block diagram of the electronic circuit shown in . Figure 2 and Figure 3 The electronic circuit 110 may include a display driver circuit 112 (first circuit), a fingerprint sensing circuit 116 (second circuit), and a touch sensing circuit 114 (third circuit). The display driver circuit 112 is configured to drive and control the display pixels 122 to display images via the display scan lines GDL and the display data lines SDL. The display driver circuit 112 generates display drive signals for driving the display data lines SDL of the display panel 120. The display driver circuit 112 may include a timing controller 121, a display driver, and other functional circuits for display operations. The display driver circuit 112 may also include other controllers or processors 123 for other control activities of the display operations. The touch sensing circuit 114 is configured to drive and control the touch sensor 124 to sense touch events of the display panel 120 via the touch sensing lines TSL. The touch sensing circuit 114 may include a touch controller 141, an analog front end (AFE) circuit, an analog-to-digital converter (ADC) circuit, and other functional circuits for touch sensing operations. The fingerprint sensing circuit 116 is configured to drive and control the fingerprint sensor 126 to sense a fingerprint on the display panel 120 via the fingerprint scanning line GSL and the fingerprint sensing line FSL. The fingerprint sensing circuit 116 receives a fingerprint sensing signal corresponding to a fingerprint image from the fingerprint sensor 126 and may also process the fingerprint sensing signal to obtain a fingerprint image. The fingerprint sensing circuit 116 may include a digital circuit 161, an AFE circuit, an ADC circuit, and other functional circuits for fingerprint sensing operations.

[0093] In one embodiment, the electronic circuit 110 is implemented as a single semiconductor chip. When the electronic circuit 110 is implemented as a single-chip integrated circuit capable of driving and controlling the display panel 120 to perform display operations, touch sensing operations, and fingerprint sensing operations, the electronic circuit 110 may include a control circuit 130. The control circuit 130 is, for example, a microcontroller-based circuit that performs all control activities for the display, touch sensing, and fingerprint sensing operations. The control circuit 130 may include a timing controller 121, a touch controller 141, a digital circuit 161, and at least one of other controllers or processors 123 of the display driver circuit 112.

[0094] The display driver circuit 112, the touch sensing circuit 114, and the fingerprint sensing circuit 116 communicate with each other via a signal transmission interface, such as a Mobile Industry Processor Interface (MIPI), an Inter-Integrated Circuit (I2C) interface, a Serial Peripheral Interface (SPI), and / or other similar or suitable interfaces.

[0095] about Figure 3 In the hardware structure of the components in the embodiment, the timing controller 121, the touch controller 141 and the digital circuit 161 can be a processor with computing capabilities. Alternatively, the timing controller 121, the touch controller 141 and the digital circuit 161 can be designed by a hardware description language (HDL) or any other design method for digital circuits familiar to those skilled in the art, and can be a hardware circuit implemented by a field programmable gate array (FPGA), a complex programmable logic device (CPLD) or an application-specific integrated circuit (ASIC). In addition, sufficient teachings, suggestions and implementation instructions for the hardware structure of the display driver circuit 112, the touch sensing circuit 114 and the fingerprint sensing circuit 116 can be obtained by referring to common sense in the relevant art, which will not be repeated below.

[0096] Figure 4 、 Figure 5A as well as Figure 5BSchematic diagram showing a wiring structure between an electronic circuit and a display panel according to an embodiment of the present invention. Figures 3 to 5B , electronic circuit 110 includes a switch circuit SW1 (a first switch circuit). Display panel 120 includes a switch circuit SW2 (a second switch circuit). Switch circuit SW1 can be configured to be coupled to switch circuit SW2 via transmission line 140. In this embodiment, switch circuit SW1 is disposed in electronic circuit 110, and display panel 120 does not include switch circuit SW1. Therefore, the size of the frame border of display panel 120 near electronic circuit 110 can be reduced.

[0097] The switch circuit SW1 includes a plurality of first terminals N1D and N1F, and a plurality of second terminals N2. The number of first terminals N1D and N1F is greater than the number of second terminals N2. The first terminal N1D is coupled to the display driver circuit 112. In this embodiment, the display driver circuit 112 includes an output buffer SOP and a signal converter DAC, and outputs a display drive signal S2 for driving the display panel 120. The first terminal N1F is coupled to the AFE circuit 163 of the fingerprint sensing circuit 116. The second terminal N2 can be configured to couple to the switch circuit SW2 of the display panel 120 via the transmission line 140.

[0098] In this embodiment, the switch circuit SW1 includes a plurality of switch units MUX1. Each switch unit MUX1 includes a first switch element 501 and a second switch element 502. The first switch element 501 is coupled between the first circuit 112 and the corresponding second terminal N2. The second switch element 502 is coupled between the second circuit 116 and the corresponding second terminal N2.

[0099] The second switching element 502 may include a first switching device 502_1 and a second switching device 502_2. The first switching device 502_1 is coupled to the corresponding second terminal N2 and the second circuit 116. The first switching device 502_1 is controlled to transmit the fingerprint sensing signal S3 to the second circuit 116 during the fingerprint sensing phase. The second switching device 502_2 is coupled between the first switching device 502_1 and the second circuit 116. The second switching device 502_2 is controlled to transmit the fingerprint sensing signal S3 to the second circuit 116 in response to touch information during the fingerprint sensing phase. The first switching device 502_1 and the second switching device 502_2 are controlled by different control signals SW1FP and SW3FP, respectively. That is, the control signal SW1FP is asserted during the fingerprint sensing phase, and the control signal SW3FP is asserted during the fingerprint sensing phase based on touch information.

[0100] The switch circuit SW2 includes a plurality of third terminals N3D and a third terminal N3F, and a plurality of fourth terminals N4. The number of third terminals N3D and third terminals N3F is greater than the number of fourth terminals N4. The third terminal N3D is coupled to the display data line SDL. The third terminal N3F is coupled to the fingerprint sensing line FSL. The fourth terminal N4 can be configured to couple to the switch circuit SW1 of the electronic circuit 110 via the transmission line 140. In addition, the switch circuit SW2 further includes a plurality of fifth terminals N5F and a plurality of sixth terminals N6. The number of fifth terminals N5F is equal to the number of sixth terminals N6. The fifth terminal N5F is coupled to the fingerprint sensing line FSL. The sixth terminal N6 can be configured to couple to the switch circuit SW1 of the electronic circuit 110 via the transmission line 140.

[0101] Specifically, the second switch circuit SW2 includes a plurality of switch units MUX2_1 (first switch units) and switch units MUX2_2 (second switch units). In this embodiment, every three first switch units MUX2_1 are grouped into a unit group, and each unit group is equipped with a second switch unit MUX2_2. The second switch units MUX2_2 are not adjacent to each other. For example, the second switch unit 127 is located between two first switch units MUX2_1 and is not adjacent to the next second switch unit, wherein Figure 4 The first switching unit to the right of the second switching unit 127 and the next second switching unit are not shown.

[0102] Each switching unit MUX2_1 includes a plurality of third switching elements 503 and one or more fourth switching elements 504. The third switching elements 503 are coupled between a third terminal N3D (a corresponding first portion of the third terminal) and a fourth terminal N4 (one of the fourth terminals). The fourth switching element 504 is coupled between a third terminal N3F (a corresponding second portion of the third terminal) and a fourth terminal N4 (one of the fourth terminals). The third terminal N3D and a first portion N3D of the third terminal N3F are coupled to a data line SDL of the display panel 120, and the third terminal N3D and a second portion N3F of the third terminal N3F are coupled to a fingerprint sensing line FSL. In this embodiment, the third switching elements 503 are switched to receive the display drive signal S2 from the electronic circuit 110 during the display drive phase. The fourth switching element 504 is switched to transmit the fingerprint sensing signal S3 to the electronic circuit 110 during the fingerprint sensing phase.

[0103] Each switch unit MUX2_2 includes a fifth switch element 505. The fifth switch element 505 is coupled between the corresponding fifth terminal N5F and the corresponding sixth terminal N6. The fifth switch element 505 is switched to transmit the fingerprint sensing signal S3 to the second switch element 502 of the electronic circuit 110 in the second time interval.

[0104] In this embodiment, pixels 122_1, 122_2, 122_3, and 122_4 each include sub-pixels of different colors. For example, pixel 122_1 includes a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B, and pixel 122_2 includes a white sub-pixel W, a red sub-pixel R, and a green sub-pixel G. Furthermore, a data line SDL coupled to the same first switch unit MUX2_1 connects to the four sub-pixels of different colors, and the four sub-pixels of different colors are arranged in a row. For example, a data line SDL coupled to the same first switch unit 125 connects to the red sub-pixel R, a green sub-pixel G, a blue sub-pixel B, and a white sub-pixel W, and the red sub-pixels R, green sub-pixel G, blue sub-pixel B, and white sub-pixel W are arranged in a first pixel row. On the other hand, the data line SDL coupled to the same first switch unit 125 is connected to the blue sub-pixel B, the white sub-pixel W, the red sub-pixel R, and the green sub-pixel G, and the blue sub-pixel B, the white sub-pixel W, the red sub-pixel R, and the green sub-pixel G are arranged in the second pixel row. The connection relationship between the data line SDL and the sub-pixels is shown in FIG. Figure 4 and therefore will not be repeated in this article.

[0105] In this embodiment, the control circuit 130 is configured to generate control signals for controlling the switch circuit SW1 and the switch circuit SW2. For example, the control circuit 130 generates the control signals SW1SD, SW1FP, and SW3FP to control the corresponding switch elements of the switch circuit SW1, and generates the control signals SW2R, SW2G, SW2B, SW2W, and SW2FP to control the corresponding switch elements of the switch circuit SW2.

[0106] During the display drive phase, control signal SW1SD turns on first portion 111 of switching element 501 but turns off second portion 113 of switching element 501 of switching circuit SW1. During the display drive phase, control signals SW2R, SW2G, SW2B, and SW2W also turn on corresponding switching elements of switching circuit SW2. Switching circuit SW2 is switched to receive display drive signal S2 from electronic circuit 110 during the display drive phase. Specifically, third switching element 503 is switched to receive display drive signal S2 from electronic circuit 110 during the display drive phase. On the other hand, during the display drive phase, control signals SW1FP and SW3FP turn off all switching elements 502 of switching circuit SW1, and control signal SW2FP turns off switching elements 504 and 505 of switching circuit SW2.

[0107] Therefore, the display drive signal S2 is output from the electronic circuit 110 to the display panel 120 via the transmission line 140 and the switch circuits SW1 and SW2. Specifically, the control circuit 130 generates control signals SW1SD, SW2R, SW2G, SW2B, and SW2W for controlling the switch circuits SW1 and SW2 to control the electronic circuit 110 to transmit the display drive signal S2 from the display driver circuit 112 to the data line SDL via the switch circuits SW1 (e.g., the first portion 111 of the switch element 501) and SW2 during the display drive phase. In this embodiment, because the data lines SDL coupled to the same first switch unit MUX2_1 are connected to four sub-pixels of different colors arranged in pixel rows, the display drive signal S2 is a multiplexed RGBW signal and is transmitted to the corresponding data lines SDL on the display panel 120 via the switch circuits SW1 and SW2.

[0108] During the fingerprint sensing phase, control signals SW1FP and SW3FP turn on the corresponding switching elements of switch circuit SW1, and control signal SW2FP turns on the corresponding switching element of switch circuit SW2. Switch circuit SW2 is switched to transmit fingerprint sensing signal S3 from display panel 120 to electronic circuit 110 during the fingerprint sensing phase. Specifically, fourth switch element 504 and fifth switch element 505 are switched to transmit fingerprint sensing signal S3 to electronic circuit 110 during the fingerprint sensing phase.

[0109] On the other hand, control signal SW1SD turns off the corresponding switching element of switch circuit SW1, and control signals SW2R, SW2G, SW2B, and SW2W turn off the corresponding switching element of switch circuit SW2. Therefore, fingerprint sensing signal S3 is input from display panel 120 to electronic circuit 110 via transmission line 140 and switch circuits SW1 and SW2. That is, control circuit 130 generates control signals SW1FP, SW3FP, and SW2FP for controlling switch circuits SW1 and SW2 to control electronic circuit 110 to receive fingerprint sensing signal S3 from fingerprint sensor 126 to AFE circuit 163 of fingerprint sensing circuit 116 via switch circuit SW1 (e.g., second switch element 502) and switch circuit SW2 during the fingerprint sensing phase. In this embodiment, transmission line 140 is shared by display drive signal S2 and fingerprint sensing signal S3. Display drive signal S2 and fingerprint sensing signal S3 are transmitted on transmission line 140 in different phases.

[0110] In this embodiment, switch unit MUX2_1 can be a 1:5 multiplexer. During the display driving phase, control signals SW2R, SW2G, SW2B, and SW2W sequentially turn on the corresponding switches of switch unit MUX2_1. During the fingerprint sensing phase, control signal SW2FP turns on the corresponding switches of switch units MUX2_1 and MUX2_2.

[0111] Figure 6 FIG2 is a schematic diagram showing a wiring structure between an electronic circuit and a display panel according to an embodiment of the present invention. Figure 4 and Figure 6 The electronic device 100 of this embodiment is similar to Figure 4 The electronic device 100 shown in FIG. 1 is a block diagram of an embodiment of the present invention, and the main difference therebetween is that, in this embodiment, at least two of the second switch units MUX2_2 are adjacent. Every six first switch units MUX2_1 are grouped into a unit group, and each unit group is equipped with a plurality of switches. Figure 6 The two second switch units MUX2_2 shown in FIG. 2 are adjacent to each other.

[0112] exist Figure 4 and Figure 6 In the embodiment, a second switching unit MUX2_2 is added to the second switching circuit for signal transmission. The second switching unit MUX2_2 is configured to transmit the fingerprint sensing signal S3 from the fingerprint sensing line FSL to the electronic circuit 110 via the transmission line 140. Therefore, under the condition that the transmission line 140 is shared by the display driving signal S2 and the fingerprint sensing signal S3, the resolution of the fingerprint image can be maintained.

[0113] Figure 7 is a schematic diagram illustrating a fan-out area corresponding to an electronic circuit according to an embodiment of the present invention. Figure 8 FIG. 1 is a schematic diagram showing a fan-out area corresponding to an electronic circuit in the related art. Figures 4 to 6 In the embodiment of the present invention, the electronic circuit 110 is connected via Figure 5A and Figure 5B The same I / O node (e.g., I / O pin) shown in FIG1 outputs the display drive signal S2 to the display panel 120 and receives the fingerprint sensing signal S3 from the display panel 120. The display drive signal S2 and the fingerprint sensing signal S3 are transmitted on the transmission line 140 in different stages and are shared by the display drive signal S2 and the fingerprint sensing signal S3. The number of I / O nodes is small, and the wiring between the electronic circuit 110 and the display panel 120 is simpler. Therefore, the width W1 of the fan-out region 910 corresponding to the electronic circuit 110 is smaller than the width W0 of the fan-out region 91 corresponding to the electronic circuit 11. Figure 7The embodiment can reduce the size of the frame border of the display panel 120 near the electronic circuit 110. For example, in this embodiment, even if the fingerprint sensing function is integrated into the electronic device 100, the frame border size can still be maintained within a specified width, such as 2 mm.

[0114] Figure 9 Schematic diagram showing a wiring structure of an electronic circuit according to an embodiment of the present invention. Figure 9 In this embodiment, the switch circuit SW1 includes a plurality of switch units MUX1, and each switch unit MUX1 includes a first switch element 501 and a second switch element 502. The second switch element 502 includes a first switch device 502_1 and a second switch device 502_2. For the sake of clarity, only the fingerprint sensor 126, the fingerprint scanning line GSL, and the fingerprint sensing line FSL are shown in the display panel 120. The detailed structure of the display panel 120 can be referred to. Figure 4 .

[0115] In this embodiment, the electronic circuit 110 further includes a wire grouping circuit 119. The wire grouping circuit 119 is coupled between the switch circuit SW1 and the AFE circuit 163 of the fingerprint sensing circuit 116. The second switch elements 502 are grouped into a plurality of groups and connected to the AFE circuit 163 through the wire grouping circuit 119. The control circuit 130 generates a control signal SW1FP and a control signal SW3FP for controlling the second switch elements 502. The second switch elements 502 can be independently controlled by the control circuit 130. The second switch elements 502 include a first switch device 502_1 and a second switch device 502_2. The control circuit 130 generates a control signal SW1FP and a control signal SW3FP for controlling the second switch elements 502. Figure 10 The second switching element 502 is determined to be on or off based on the touch area TSA shown in FIG. For example, the second switching device 502_2 can be controlled to transmit the fingerprint sensing signal S3 to the fingerprint sensing circuit 116 in response to touch information (e.g., the touch area TSA) during the fingerprint sensing phase, and to turn on the corresponding first switching device 502_1. The turned-on second switching element 502 establishes coupling between the fingerprint sensing line FSL and the fingerprint sensing channel for fingerprint sensing operations.

[0116] In this embodiment, the wire grouping circuit 119 is coupled between the switch circuit SW1 and the AFE circuit 163 to connect multiple fingerprint sensing lines FSL to each sensing channel in the AFE circuit 163 in a wire-OR configuration. By grouping the second switch elements, the wire grouping circuit 119 groups the fingerprint sensing lines FSL into multiple groups, and these groups are correspondingly connected to the fingerprint sensing channels in the AFE circuit 163. Each group of fingerprint sensing lines FSL corresponds to one fingerprint sensing channel. For example, the AFE circuit 163 can be designed to have 200 fingerprint sensing channels and 1000 fingerprint sensing lines FSL. The 1000 fingerprint sensing lines are grouped into 200 groups, each with five fingerprint sensing lines. The 1st, 201st, 401st, 601st, and 801st fingerprint sensing lines are connected to one another in the same group via corresponding switch devices 502_1 and 502_2, and wire grouping circuit 119, and are coupled to the first fingerprint sensing channel. Similarly, the 2nd, 202nd, 402nd, 602nd, and 802nd fingerprint sensing lines are connected to one another in the same group via corresponding switch devices 502_1 and 502_2, and wire grouping circuit 119, and are coupled to the second fingerprint sensing channel. The connection relationships of the remaining fingerprint sensing lines and channels can be similarly derived. Within the same group, the fingerprint sensing lines FSL are connected in a wired-OR fashion and are not simultaneously shorted.

[0117] The number of fingerprint sensing lines FSL, the number of fingerprint sensing channels, and the connection relationship between the fingerprint sensing lines FSL and the fingerprint sensing channels are merely for illustration, and the present invention is not limited thereto.

[0118] The control circuit 130 generates control signals SW1FP, SW1SD, and SW3FP for controlling the switch circuit SW1. This control signals SW1FP and SW3FP control the electronic circuit 110 during the fingerprint sensing phase, allowing the fingerprint sensing signal S3 from the fingerprint sensor 126 to be transmitted to the AFE circuit 163 via the switch circuit SW1. During the fingerprint sensing phase, the control signals SW1FP and SW3FP turn on the corresponding switching elements of the switch circuit SW1, while the control signal SW1SD turns off the corresponding switching elements of the switch circuit SW1. In this embodiment, the first switch device 502_1 and the second switch device 502_2 are controlled by different control signals SW1FP and SW3FP, respectively. The control signal SW1FP is asserted during the fingerprint sensing phase, and the control signal SW3FP is asserted during the fingerprint sensing phase based on touch information. In other words, the transmission path between the first terminal N1F and the second terminal N2 in the switch circuit SW1 is conducted based on the touch information. Therefore, the electronic circuit 110 receives the fingerprint sensing signal S3 from the fingerprint sensor 126 via the switch circuit SW1.

[0119] Figure 10 Schematic diagram showing the operation of a display panel for fingerprint sensing according to an embodiment of the present invention. Figure 4 、 Figure 5A 、 Figure 5B 、 Figure 9 as well as Figure 10 The electronic circuit 110 can drive and control the display panel 120 to sense one or more fingerprint images FPI_1, fingerprint image FPI_2, fingerprint image FPI_3, and fingerprint image FPI_4 detected on the display panel 120. In this embodiment, the fingerprint sensing lines FSL extend in direction Y (e.g., vertical direction) and are arranged in parallel in direction X (e.g., horizontal direction), as shown in FIG. Figure 2As shown, the display panel 120 is not pre-divided into fixed areas for fingerprint sensing in at least the X direction. That is, the display panel 120 does not have a predetermined fingerprint sensing area for each fingerprint sensing line FSL in the X direction. The size and shape of the fingerprint sensing area of ​​the display panel 120 are not predetermined. Fingerprint sensing areas 401, 402, 403, and 404 can be flexibly formed for fingerprint sensing by selecting a portion of the plurality of fingerprint sensing lines FSL arranged above the display panel 120. The edges or boundaries of the fingerprint sensing areas 401, 402, 403, and 404 can correspond to any of the fingerprint sensing lines FSL without restriction. Because the size and shape of the fingerprint sensing area in the X direction are not predetermined, cross-over sensing is not required to process signals from different areas during the sensing process. Cross-over sensing typically requires more fingerprint sensing time and may cause sensing delays.

[0120] Specifically, the control circuit 130 is based on the Figure 2 The touch sensing signal S1 output by the touch sensing line TSL shown in the figure is used to determine one or more touch areas TSA corresponding to the fingerprint image FPI_1, fingerprint image FPI_2, fingerprint image FPI_3 and fingerprint image FPI_4. The control circuit 130 can determine the size and range of the touch area TSA. The range of the touch area TSA can be determined by the touch area of ​​the finger or a predetermined value. Alternatively, in one embodiment, the control circuit 130 can determine the coordinate information of the center or near the center of each touch area TSA and determine the size of the touch area TSA. The size of each touch area TSA can depend on design requirements, for example, the number of fingerprint sensing channels designed in the AFE circuit 163. The touch area TSA corresponds to the fingerprint sensing area used to cover the fingerprint image.

[0121] In the fingerprint sensing phase, the control circuit 130 validates the control signal SW1FP and controls the first switch device 502_1 to be turned on by using the validated control signal SW1FP. On the other hand, in the fingerprint sensing phase, the control circuit 130 validates the control signal SW3FP based on the touch information and controls a portion of the second switch device 502_2 to be turned on by using the validated control signal SW3FP. The second switch device 502_2 that is turned on according to the touch area TSA can select a portion of the fingerprint sensing line FSL for the fingerprint sensing operation. That is, the second switch device 502_2 corresponding to the selected fingerprint sensing line FSL will be turned on. Figure 11In the example, the second switch device 502_2 corresponding to the selected fingerprint sensing line FSL is turned on according to the asserted control signal SW3FP, and the second switch device 502_2 corresponding to the unselected fingerprint sensing line FSL is turned off according to the deasserted control signal SW3FP. The fingerprint sensing signal S3 from the fingerprint sensor 126 is transmitted to the AFE circuit 163 via the selected fingerprint sensing line FSL. In other words, the touch sensing circuit 114 determines touch information based on the touch sensing signal S1, and the second switch device 502_2 is controlled to transmit the fingerprint sensing signal S3 to the fingerprint sensing circuit 116 in response to the touch information determination. The fingerprint sensing circuit 116 receives the fingerprint sensing signal S3 by selecting the fingerprint sensing line FSL of the display panel 120 based on the touch information.

[0122] By controlling the conduction state of the second switching device 502_2, a fingerprint sensing line FSL corresponding to the touch area TSA is selected from the plurality of fingerprint sensing lines FSL on the display panel 120. Therefore, in this embodiment, a portion of the fingerprint sensing lines FSL can be flexibly selected to form fingerprint sensing area 401, fingerprint sensing area 402, fingerprint sensing area 403, or fingerprint sensing area 404, the size and range of which are determined by the touch area TSA. Consequently, the AFE circuit 163 can receive fingerprint sensing signals for fingerprint image FPI_1, fingerprint image FPI_2, fingerprint image FPI_3, or fingerprint image FPI_4 in a single turn in the horizontal direction (X direction), eliminating the need for cross-zone sensing. This eliminates the need for cross-zone sensing when receiving fingerprint sensing signals for fingerprint image FPI_1, fingerprint image FPI_2, fingerprint image FPI_3, or fingerprint image FPI_4 in the horizontal direction, thereby reducing the time required for fingerprint sensing.

[0123] Figure 11 Schematic diagram showing a wiring structure of an electronic circuit according to another embodiment of the present invention. Figure 9 and Figure 11 , the electronic circuit 110 of this embodiment is similar to Figure 9 The electronic circuit 110 shown in FIG. 1 is a circuit diagram of an embodiment of the present invention, and the main difference therebetween is that the second switch element 502 of the embodiment is controlled by the control signal SW13FP. In the embodiment, according to the design requirements, Figure 9 The second switching device 502_2 can be Figure 11 is omitted or considered to be combined with the first switch device 502_1 to form Figure 11 The second switching element 502 is shown in FIG.

[0124] Specifically, in the fingerprint sensing phase, the control circuit 130 validates the control signal SW13FP based on the touch information. By using the validated control signal SW13FP, the control circuit 130 controls a portion of the second switch elements 502 to be turned on. According to the touch area TSA, the portion of the second switch elements 502 that are turned on can select the fingerprint sensing line FSL for the fingerprint sensing operation. In other words, the second switch element 502 corresponding to the selected fingerprint sensing line FSL is turned on. Figure 11 In the embodiment, the second switch element 502 corresponding to the selected fingerprint sensing line FSL is turned on according to the asserted control signal SW13FP, and the second switch element 502 corresponding to the unselected fingerprint sensing line FSL is turned off according to the deactivated control signal SW13FP.

[0125] In the above embodiments, the number of fingerprint sensing lines FSL, the number of fingerprint sensing channels, and the connection relationship between the fingerprint sensing lines FSL and the fingerprint sensing channels are merely illustrative, and the present invention is not limited thereto.

[0126] In addition, the operation of the electronic circuit 110 of this embodiment can be Figure 9 and Figure 10 Sufficient teaching, suggestion and implementation instructions are obtained from the embodiments of the present invention, and therefore no further description is provided herein.

[0127] Figure 12 FIG is a schematic diagram showing the detailed structure of a fingerprint sensor according to an embodiment of the present invention. Figure 12 The fingerprint sensor 126 operates between the system voltage VDD and the system voltage GND. The fingerprint sensor 126 includes a photodiode PD, a reset transistor RST, a transfer transistor TX, a bypass transistor BPT, and a row select transistor SEL. The gate terminals of the reset transistor RST, the transfer transistor TX, and the row select transistor SEL are controlled by control signals RSTc, TXc, and SELc, respectively. These control signals are used for fingerprint scanning control and are only enabled during the fingerprint sensing phase. In other words, the row select transistor SEL of the fingerprint sensor 126 is turned off during the touch sensing phase, so that the fingerprint sensor 126 does not drive the fingerprint sensing line FSL. Therefore, the fingerprint sensor 126 does not affect the conduction state of the fingerprint sensing line FSL during the touch sensing phase. This facilitates controlling the switch circuits SW1 and SW2 to transmit the synchronous drive signal S7 to the fingerprint sensing line FSL during the touch sensing phase. Furthermore, sufficient teachings, suggestions, and implementation instructions for the operation of the fingerprint sensor 126 can be obtained by referring to common knowledge in the relevant art and are not repeated here.

[0128] In summary, in embodiments of the present invention, display drive signals and fingerprint sensing signals are transmitted over the same transmission line in different stages. The transmission line is shared by both the display drive signal and the fingerprint sensing signal. The electronic circuit outputs the display drive signal to the display panel and receives the fingerprint sensing signal from the display panel via the same pin connected to the transmission line. This simplifies the wiring between the electronic circuit and the display panel. The width of the fan-out region corresponding to the electronic circuit and the size of the display panel frame border near the electronic circuit can also be small. Furthermore, a touch area is determined to form a fingerprint sensing zone for forming a fingerprint image. Based on the touch area, a control circuit selects a portion of the fingerprint sensing line for fingerprint sensing. The switch corresponding to the selected fingerprint sensing line is turned on to couple the selected fingerprint sensing line to a fingerprint sensing channel of the fingerprint sensing circuit. By selecting a fingerprint sensing line corresponding to the touch area from among multiple fingerprint sensing lines on the display panel, a fingerprint sensing zone can be flexibly formed whose size / range is determined by the touch area. This allows the fingerprint sensing channel to receive fingerprint sensing signals in a single horizontal turn, reducing the time required for fingerprint sensing. Consequently, the method for fingerprint sensing and identification is more efficient, providing users with a better user experience.

[0129] Furthermore, the fingerprint sensing signal is transmitted from the fingerprint sensing line to the electronic circuit via a transmission line. The display panel's switching circuit includes a switch unit for transmitting the fingerprint sensing signal. Therefore, while the transmission line is shared between the display drive signal and the fingerprint sensing signal, the resolution of the fingerprint image can be maintained.

[0130] It will be appreciated by those skilled in the art that various modifications and variations may be made to the disclosed embodiments without departing from the scope or spirit of the present disclosure. In view of the foregoing, it is intended that the present disclosure cover modifications and variations, provided that the modifications and variations fall within the scope of the appended claims and their equivalents.

Claims

1. An electronic circuit adapted to drive a display panel including a touch sensor and a fingerprint sensor, the electronic circuit comprising: a first circuit configured to generate a display driving signal for driving a data line of the display panel; a second circuit configured to receive a fingerprint sensing signal corresponding to a fingerprint image from the fingerprint sensor; a first switching circuit comprising a plurality of first switching elements coupled to the first circuit and a plurality of second switching elements coupled to the second circuit; as well as a control circuit configured to generate a control signal for controlling the first switch circuit, and to: controlling the electronic circuit to transmit the display drive signal from the first circuit to the data line through the first portion of the first switching element in a first time interval, and The electronic circuit is controlled to receive the fingerprint sensing signal from the fingerprint sensor of the display panel through the second switching element in a second time interval. 2 . The electronic circuit of claim 1 , wherein the control circuit switches on the first portion of the first switching element and switches off a second portion of the first switching element in the first time interval. 3 . The electronic circuit according to claim 2 , wherein the control circuit turns off all of the second switching elements in the first time interval. 4 . The electronic circuit according to claim 1 , wherein the control circuit turns off all of the first switching elements in the second time interval. 5 . The electronic circuit according to claim 1 , wherein the first time interval corresponds to a display driving phase, and the second time interval corresponds to a fingerprint sensing phase.

6. The electronic circuit according to claim 1 , wherein the first switching circuit comprises: a plurality of first terminals coupled to the first circuit and the second circuit; and a plurality of second terminals configured to be coupled to a second switch circuit on the display panel.

7. The electronic circuit according to claim 6, wherein the first switch circuit comprises a plurality of switch units, and each of the switch units of the first switch circuit comprises: One of the first switching elements is coupled between the first circuit and a corresponding one of the second terminals; as well as One of the second switching elements is coupled between the second circuit and the corresponding one of the second terminals.

8. The electronic circuit according to claim 7, wherein the second switching element comprises: a first switching device coupled to the corresponding one of the second terminals and the second circuit and controlled to transmit the fingerprint sensing signal to the second circuit in the second time interval; as well as a second switching device coupled between the first switching device and the second circuit and controlled to transmit the fingerprint sensing signal to the second circuit in response to touch information, The first switching device and the second switching device are controlled by different control signals.

9. The electronic circuit according to claim 6, wherein the second switching circuit comprises: a plurality of third terminals coupled to the data lines and fingerprint sensing lines of the display panel; and a plurality of fourth terminals configured to be coupled to the second terminals of the first switching circuit.

10. The electronic circuit according to claim 9, wherein the second switch circuit comprises a plurality of first switch units, and each of the first switch units of the second switch circuit comprises: a plurality of third switching elements coupled between respective first portions of the third terminal and one of the fourth terminals, and switching the third switching elements to receive the display drive signal from the electronic circuit in the first time interval; as well as One or more fourth switching elements are coupled between corresponding second portions of the third terminal and the one of the fourth terminals, and are switched to transmit the fingerprint sensing signal to the electronic circuit in the second time interval.

11. The electronic circuit according to claim 10, wherein The first portion of the third terminal is coupled to the data line of the display panel, and the second portion of the third terminal is coupled to the fingerprint sensing line. 12 . The electronic circuit according to claim 10 , wherein the data line coupled to the same first switching unit is connected to sub-pixels of four different colors, and the sub-pixels of the four different colors are arranged in a row.

13. The electronic circuit according to claim 10, wherein the second switch circuit further comprises: a plurality of fifth terminals coupled to the fingerprint sensing lines of the display panel; and a plurality of sixth terminals configured to be coupled to the second terminal of the first switching circuit.

14. The electronic circuit according to claim 13, wherein the second switch circuit further comprises a plurality of second switch units, and each of the second switch units of the second switch circuit comprises: a fifth switching element coupled between the corresponding fifth terminal and the corresponding sixth terminal, wherein the fifth switching element is switched to transmit the fingerprint sensing signal to the second switching element of the electronic circuit in the second time interval. The electronic circuit according to claim 14 , wherein at least two of the second switching units are adjacent. The electronic circuit according to claim 14 , wherein the second switching units are not adjacent to each other.

17. The electronic circuit of claim 1, wherein the electronic circuit is implemented in a semiconductor chip.

18. A display panel comprising: Multiple pixels and touch sensors; a plurality of data lines coupled to the pixels and configured to receive display drive signals; a plurality of fingerprint sensors configured to sense fingerprint images and generate fingerprint sensing signals corresponding to the fingerprint images; a plurality of fingerprint sensing lines coupled to the fingerprint sensor and configured to transmit the fingerprint sensing signal; as well as The switch circuit includes: a plurality of first switch units coupled to the data line and a first portion of the fingerprint sensing line; and a plurality of second switching units coupled to a second portion of the fingerprint sensing line, wherein the first switching unit is switched to receive the display driving signal from the electronic circuit in a first time interval, and the first switching unit and the second switching unit are switched to transmit the fingerprint sensing signal to the electronic circuit in a second time interval.

19. The display panel according to claim 18, wherein the switch circuit comprises: a plurality of first terminals coupled to the data line and the fingerprint sensing line; and a plurality of second terminals configured to be coupled to the electronic circuit.

20. The display panel according to claim 19, wherein each of the first switching units comprises: a plurality of first switching elements coupled between respective first portions of the first terminals and one of the second terminals, and switching the first switching elements to receive the display drive signal from the electronic circuit in the first time interval; as well as One or more second switching elements are coupled between corresponding second portions of the first terminals and the one of the second terminals, and are switched to transmit the fingerprint sensing signal to the electronic circuit in the second time interval.

21. The display panel according to claim 20, wherein The first portion of the first terminal is coupled to the data line of the display panel, and the second portion of the first terminal is coupled to the fingerprint sensing line. 22 . The display panel according to claim 21 , wherein the data lines coupled to the same first switching unit are connected to sub-pixels of four different colors, and the sub-pixels of the four different colors are arranged in a row.

23. The display panel according to claim 20, wherein the switch circuit further comprises: a plurality of third terminals coupled to the fingerprint sensing lines of the display panel; and a plurality of fourth terminals configured to be coupled to the electronic circuit.

24. The display panel according to claim 23, wherein each of the second switching units comprises: A third switching element is coupled between the corresponding third terminal and the corresponding fourth terminal, wherein the third switching element is switched to transmit the fingerprint sensing signal to the electronic circuit in the second time interval.

25. The display panel of claim 24, wherein at least two of the second switching units are adjacent. The display panel according to claim 24 , wherein the second switching units are not adjacent to each other. 27 . The display panel according to claim 18 , wherein the first time interval corresponds to a display driving phase, and the second time interval corresponds to a fingerprint sensing phase.

28. An electronic device comprising: display panel, including touch sensor and fingerprint sensor; as well as an electronic circuit configured to be coupled to the display panel and adapted to drive the display panel with a display driving signal and receive a fingerprint sensing signal corresponding to a fingerprint image from the fingerprint sensor, The electronic circuit includes a first switching circuit, the first switching circuit includes a plurality of first switching elements and a plurality of second switching elements, and the electronic circuit generates a control signal for controlling the first switching circuit so as to transmit the display driving signal to the display panel through a first part of the first switching elements in a first time interval, and receive the fingerprint sensing signal from the fingerprint sensor through the second switching elements in a second time interval. 29 . The electronic device according to claim 28 , wherein the first time interval corresponds to a display driving phase, and the second time interval corresponds to a fingerprint sensing phase.

30. The electronic device of claim 28, wherein the electronic circuit comprises: a first circuit configured to generate the display driving signal for driving the data line of the display panel through the first switching circuit; a second circuit configured to receive the fingerprint sensing signal corresponding to the fingerprint image from the fingerprint sensor through the first switching circuit; as well as a control circuit configured to generate the control signal for controlling the first switching circuit, and to: controlling the electronic circuit to transmit the display drive signal from the first circuit to the data line through the first portion of the first switching element during the first time interval, and The electronic circuit is controlled to receive the fingerprint sensing signal from the fingerprint sensor of the display panel through the second switching element and the first switching circuit in the second time interval.

31. The electronic device of claim 30, wherein the control circuit turns on the first portion of the first switching element and turns off a second portion of the first switching element in the first time interval.

32. The electronic device of claim 31, wherein the control circuit turns off all of the second switching elements in the first time interval.

33. The electronic device of claim 30, wherein the control circuit turns on all of the second switching elements and turns off all of the first switching elements in the second time interval.

34. The electronic device according to claim 30, wherein the first switch circuit comprises: a plurality of first terminals coupled to the first circuit and the second circuit; and a plurality of second terminals configured to be coupled to a second switch circuit on the display panel.

35. The electronic device according to claim 34, wherein the first switch circuit comprises a plurality of switch units, each of the switch units of the first switch circuit comprises: a first switching element among the first switching elements, coupled between the first circuit and a corresponding one of the second terminals, and controlled to transmit the display driving signal from the first circuit in the first time interval; as well as One of the second switching elements is coupled between the second circuit and the corresponding one of the second terminals, and is controlled to transmit the fingerprint sensing signal to the second circuit in the second time interval.

36. The electronic device according to claim 35, wherein the second switching element comprises: a first switching device coupled to the corresponding one of the second terminals and the second circuit and controlled to transmit the fingerprint sensing signal to the second circuit in the second time interval; as well as a second switching device coupled between the first switching device and the second circuit and controlled to transmit the fingerprint sensing signal to the second circuit in response to touch information, The first switching device and the second switching device are controlled by different control signals.

37. The electronic device of claim 28, wherein the electronic circuit is implemented in a semiconductor chip.

38. The electronic device according to claim 28, wherein the display panel further comprises: Multiple pixels; a plurality of data lines coupled to the pixels and configured to receive the display driving signals; a plurality of fingerprint sensing lines coupled to the fingerprint sensor and configured to transmit the fingerprint sensing signal; as well as The second switch circuit includes: a plurality of third terminals coupled to the data line and the fingerprint sensing line; and a plurality of fourth terminals configured to be coupled to the electronic circuit.

39. The electronic device according to claim 38, wherein the second switch circuit comprises a plurality of first switch units, each of the first switch units of the second switch circuit comprises: a plurality of third switching elements coupled between respective first portions of the third terminal and one of the fourth terminals, and switching the third switching elements to receive the display drive signal from the electronic circuit in the first time interval; as well as One or more fourth switching elements are coupled between corresponding second portions of the third terminal and the one of the fourth terminals, and are switched to transmit the fingerprint sensing signal to the electronic circuit in the second time interval.

40. The electronic device according to claim 39, wherein The first portion of the third terminal is coupled to the data line of the display panel, and the second portion of the third terminal is coupled to the fingerprint sensing line.

41. The electronic device according to claim 39, wherein the data lines coupled to the same first switching unit are connected to sub-pixels of four different colors, and the sub-pixels of the four different colors are arranged in a row.

42. The electronic device according to claim 39, wherein the second switch circuit further comprises: a plurality of fifth terminals coupled to the fingerprint sensing lines of the display panel; and a plurality of sixth terminals configured to be coupled to the second terminals of the first switching circuit.

43. The electronic device according to claim 42, wherein the second switch circuit further comprises a plurality of second switch units, and each of the second switch units of the second switch circuit comprises: a fifth switching element coupled between the corresponding fifth terminal and the corresponding sixth terminal, wherein the fifth switching element is switched to transmit the fingerprint sensing signal to the second switching element of the electronic circuit in the second time interval. The electronic device according to claim 43 , wherein at least two of the second switching units are adjacent. The electronic device according to claim 43 , wherein the second switching units are not adjacent to each other.

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