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

Abstract

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 and a switch 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 a fingerprint sensing line of the display panel. The switch circuit includes a plurality of first ends and a plurality of second ends. The first end is coupled to the first circuit and the second circuit. The second end can be configured to be coupled to the display panel via a plurality of first pins of the electronic circuit. Each of the first pins can be configured to be coupled to a corresponding data line and a corresponding fingerprint sensing line in the display panel.

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 the electronic device, the fingerprint sensing area may overlap with the display area of ​​the electronic device. For example, under-display fingerprint recognition technology is to embed the fingerprint sensor into the display panel, and the fingerprint sensor can sense or capture 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 preset interface. Then, the application processor further controls the display drive circuit to drive the display panel to display the image for fingerprint sensing. On the other hand, the application processor further controls the fingerprint sensing circuit to perform a fingerprint sensing operation. The fingerprint sensing circuit transmits the sensing information to the application processor for fingerprint recognition after the fingerprint sensing operation. Then, the application processor completes the fingerprint recognition based on the sensing information.

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

[0004] The present invention is directed to an electronic circuit, an electronic device and a display panel, wherein the width of the fan-out area corresponding to the electronic circuit and the frame size of the display panel near the electronic circuit are small. In addition, the number of I / O pins of the electronic circuit and the display panel is also small.

[0005] In an embodiment of the present invention, an electronic circuit is suitable for driving a display panel including a touch sensor and a fingerprint sensor. The electronic circuit includes a first circuit, a second circuit, and a first switching 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 a fingerprint sensing line of the display panel. The first switching circuit includes a plurality of first ends and a plurality of second ends. The first end is coupled to the first circuit and the second circuit. The second end can be configured to be coupled to the display panel via a plurality of first pins of the electronic circuit. Each of the first pins can be configured to be coupled to a corresponding data line and a corresponding fingerprint sensing line in the display panel.

[0006] In an embodiment of the present invention, a display panel includes a plurality of pixels and a plurality of fingerprint sensors, a plurality of data lines, a plurality of fingerprint sensing lines, and a plurality of pins. The fingerprint sensor is configured to sense a fingerprint image and generate a fingerprint sensing signal corresponding to the fingerprint image. The data line is coupled to the pixel and configured to receive a display driving signal. The fingerprint sensing line is coupled to the fingerprint sensor and configured to transmit a fingerprint sensing signal. Each of the plurality of pins is coupled to a corresponding data line and a corresponding fingerprint sensing line.

[0007] In an embodiment of the present invention, an electronic device includes a display panel and an electronic circuit. The display panel includes a plurality of data lines and a plurality of fingerprint sensing lines. The electronic circuit is suitable for driving the display panel with a display drive signal and receiving a fingerprint sensing signal corresponding to a fingerprint image from the fingerprint sensing line. The electronic circuit includes a plurality of first pins, and the display panel includes a plurality of second pins. The number of first pins is equal to the number of second pins. The electronic circuit is coupled to the display panel via the first pin and the second pin. Each of the plurality of second pins is coupled to a corresponding data line and a corresponding fingerprint sensing line in the display panel. Each of the plurality of first pins is coupled to a corresponding data line and a corresponding fingerprint sensing line in the display panel via a corresponding second pin.

[0008] In an embodiment of the present invention, an electronic circuit is 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 third circuit and a first switch 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 a fingerprint sensing line of the display panel. The third circuit is configured to determine touch information based on the touch sensing signal from the touch sensor. The second circuit receives the fingerprint sensing signal through the fingerprint sensing line of the display panel selected according to the touch information. The first switch circuit includes a plurality of first ends and a plurality of second ends. The first end is coupled to the first circuit and the second circuit. The second end can be configured to be coupled to the display panel via a plurality of first pins of the electronic circuit. Each of the plurality of first pins can be configured to be coupled to a corresponding data line and a corresponding fingerprint sensing line in the display panel.

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

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

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

[0012] Figure 2 To show Figure 1 Schematic diagram of the display panel depicted in .

[0013] Figure 3 To show Figure 1 Schematic block diagram of the electronic circuit depicted in .

[0014] Figure 4A FIG. 1 is a schematic diagram showing an electronic device according to another embodiment of the present invention.

[0015] Figure 4B FIG. 1 is a schematic diagram showing an electronic device according to another embodiment of the present invention.

[0016] Figure 5 To show Figure 4A Schematic diagram of the electronic circuit depicted in .

[0017] Figure 6 FIG. 1 is a schematic diagram showing an electronic device according to another embodiment of the present invention.

[0018] Figure 7 and Figure 8 FIG. 1 is a schematic diagram showing a wiring structure between an electronic circuit and a display panel according to an embodiment of the present invention.

[0019] Fig.9A FIG. 1 is a schematic diagram showing a detailed structure of a display panel according to an embodiment of the present invention.

[0020] Fig. 9B To show the control Fig.9A Graph depicting a waveform of a control signal of a switching element.

[0021] Fig. 9C FIG. 1 is a schematic diagram showing a detailed structure of a display panel side according to another embodiment of the present invention.

[0022] Fig. 10A FIG. 1 is a schematic diagram showing a detailed structure of a display panel side according to another embodiment of the present invention.

[0023] Fig. 10B To show the control Fig. 10A Graph depicting a waveform of a control signal of a switching element.

[0024] Fig.11 FIG. 1 is a schematic diagram showing a detailed structure of a display panel side according to another embodiment of the present invention.

[0025] Fig.12 FIG. 1 is a schematic diagram showing a fan-out region of an electronic circuit according to an embodiment of the present invention.

[0026] Fig.13 FIG. 1 is a schematic diagram showing a fan-out area corresponding to an electronic circuit in the related art.

[0027] Fig.14 FIG. 1 is a schematic diagram illustrating the operation of a display panel for fingerprint sensing according to an embodiment of the present invention.

[0028] Fig.15 FIG. 1 is a schematic diagram showing a wiring structure of an electronic circuit according to an embodiment of the present invention.

[0029] Fig.16 FIG. 1 is a schematic diagram showing a wiring structure of an electronic circuit according to another embodiment of the present invention.

[0030] Fig.17A and Fig. 17B FIG. 1 is a schematic diagram showing a wiring structure of an electronic circuit according to another embodiment of the present invention.

[0031] Fig.18A To illustrate a method for controlling the Fig.17A and Fig. 17B Waveform diagram of the control signal of the switching element.

[0032] Fig.18B To illustrate a method for controlling a Fig.17A and Fig. 17B Waveform diagram of the control signal of the switching element.

[0033] Fig.19 FIG. 4 is a schematic diagram showing the detailed structure of a fingerprint sensor according to an embodiment of the present invention.

[0034] Description of Figure Numbers

[0035] 11, 110: electronic circuits;

[0036] 91, 910: fan-out area;

[0037] 100: electronic device;

[0038] 112: display driving circuit;

[0039] 114: touch sensing circuit;

[0040] 116: fingerprint sensing circuit;

[0041] 118: first pin;

[0042] 119: Wire grouping circuit;

[0043] 120: display panel;

[0044] 121: timing controller;

[0045] 122, 122A, 122B: display pixels;

[0046] 123: other controllers or processors;

[0047] 124: touch sensor;

[0048] 126: fingerprint sensor;

[0049] 128: second pin;

[0050] 129: Switching element;

[0051] 130: control circuit;

[0052] 140: Transmission line;

[0053] 141: touch controller;

[0054] 161: Digital circuits;

[0055] 163, 604: AFE circuit;

[0056] 401, 402, 403, 404: fingerprint sensing area;

[0057] 501: a first switching element;

[0058] 502: a second switch element;

[0059] 502_1: a first switch device;

[0060] 502_2: second switch device;

[0061] 503: a third switch element;

[0062] 504: a fourth switch element;

[0063] 505: fifth switch element;

[0064] 601: output buffer circuit;

[0065] 602: Gamma circuit;

[0066] 603: input buffer circuit;

[0067] 605: ADC circuit;

[0068] BPT: bypass transistor;

[0069] DAC: signal converter;

[0070] FSL: Fingerprint sensing line;

[0071] GD1, GD2, GDL, GDm, GDx: display scan lines;

[0072] GND, VDD: system voltage;

[0073] GS1, GS2, GSL, GSm, GSx: fingerprint scanning line;

[0074] MUX1, MUX2: switch unit;

[0075] N1D, N1F, N1T: first end;

[0076] N2: second end;

[0077] N3D, N3F: third terminal;

[0078] N4: fourth terminal;

[0079] PD: photodiode;

[0080] RST: reset transistor;

[0081] RSTc, SELc, SW13FP, SW1FP, SW1SD, SW1TP, SW2B, SW2B1, SW2B2, SW2FP, SW2FP1, SW2FP2, SW2G, SW2G1, SW2G2, SW2R, SW2R1, SW2R2, SW2W, SW3FP, TXc: control signal;

[0082] S1: touch sensing signal;

[0083] S2: display drive signal;

[0084] S3: fingerprint sensing signal;

[0085] S6: touch drive signal;

[0086] S7: synchronous driving signal;

[0087] SD1, SD2, SDL, SDn, SDy: display data lines;

[0088] SEL: row select transistor;

[0089] SO1, SO2, SOn, SOy: fingerprint sensing lines;

[0090] SOP: output buffer;

[0091] SW1: first switch circuit;

[0092] SW2: second switch circuit;

[0093] T1: display driving stage;

[0094] T2: fingerprint sensing stage;

[0095] T3: touch sensing stage;

[0096] TSA: Touch Area;

[0097] TSL: touch sensing line;

[0098] TX: transfer transistor;

[0099] W0, W1: width;

[0100] X, Y: direction;

[0101] Fingerprint images: FPI_1, FPI_2, FPI_3, FPI_4. DETAILED DESCRIPTION

[0102] Embodiments are provided below to describe the present invention in detail, but the present invention is not limited to the embodiments provided, and the embodiments provided may be appropriately combined. The terms "coupling / coupled" or "connecting / connected" used in the 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 "a first device is directly connected to a second device" or "a first device is indirectly connected to a 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 a first signal and a second signal".

[0103] Figure 1 2 is a schematic block diagram of 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.

[0104] 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 smart phone, a non-smart phone, a wearable electronic device, a tablet computer, a personal digital assistant, a notebook computer, and other portable electronic devices that can be independently operated and have 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 table lamp, and the like.

[0105] Figure 2 To show Figure 1 A schematic diagram of the display panel depicted in FIG. Figure 2 , the display panel 120 of the present 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 display scan lines GDL and 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 touch scan lines and 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 the present embodiment, in Figure 2 In the embodiment, an embedded touch sensor is used as an example. For the embedded touch sensor, the display panel 120 does not have a touch scan line. For other types of touch sensors, the display panel 120 may have a touch scan line for transmitting a touch drive signal. Figure 2 In the embodiment of the present invention, the touch sensing line TSL may also be 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.

[0106] In one embodiment, the display panel 120 may be a liquid crystal display (LCD) panel, such as a low temperature polysilicon (LTPS) panel or an amorphous silicon (a-Si) LCD panel or an organic light-emitting diode (OLED) panel. In one embodiment, the display panel 120 may be an embedded 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, that is, a fingerprint identification operation. In one embodiment, the fingerprint sensor 126 may be an optical fingerprint sensor.

[0107] Figure 3 To show Figure 1 A schematic block diagram of the electronic circuit depicted in FIG. Figure 3 , the electronic circuit 110 may include a display driving circuit 112 (first circuit), a fingerprint sensing circuit 116 (second circuit) and a touch sensing circuit 114 (third circuit). The display driving circuit 112 is configured to drive and control the display pixel 122 to display an image via the display scan line GDL and the display data line SDL. The display driving circuit 112 generates a display driving signal for driving the display data line SDL of the display panel 120. The display driving circuit 112 may include a timing controller 121, a display driver, and other functional circuits for display operation. The display driving circuit 112 may also include other controllers or processors 123 for other control operations of the display operation. The touch sensing circuit 114 is configured to drive and control the touch sensor 124 to sense a touch event of the display panel 120 via the touch sensing line 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 the 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.

[0108] 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 that can drive and control 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, and the control circuit 130 may be a circuit based on a microcontroller to perform all control operations of the display operation, touch sensing operation, and fingerprint sensing operation. The control circuit 130 may include at least one of the timing controller 121, the touch controller 141, the digital circuit 161, and other controllers or processors 123 of the display driver circuit 112.

[0109] The display driving 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.

[0110] about Figure 3 The hardware structure of the components in the embodiment of the present invention, 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 technicians in the field, 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 driving circuit 112, the touch sensing circuit 114 and the fingerprint sensing circuit 116 can be obtained by referring to the common knowledge in the relevant technology, which will not be repeated below.

[0111] Figure 4A FIG. 1 is a schematic diagram showing an electronic device according to another embodiment of the present invention. Figure 5 To show Figure 4A A schematic diagram of the electronic circuit depicted in . Figure 4A and Figure 5 , the display panel 120 includes a plurality of display pixels 122A and a plurality of fingerprint sensors 126. In the present embodiment, the display panel 120 may be an LCD panel. The display panel 120 further includes a plurality of display data lines SD1, SD2 to SDn, a plurality of display scan lines GD1, GD2 to GDm, a plurality of fingerprint sensing lines SO1, SO2 to SOn, and a plurality of fingerprint scan lines GS1, GS2 to GSm, where n and m are natural numbers. Figure 5 As shown in , the display pixel 122A is coupled to the corresponding display data line SDy and the corresponding display scan line GDx, and the fingerprint sensor 126 is coupled to the corresponding fingerprint sensing line SOy and the corresponding fingerprint scan line GSx.

[0112] Taking the LCD panel as an example, the electronic circuit 110 uses the display driving signal S2 to drive the display pixel 122A of the display panel 120 via the display data line SD1, the display data line SD2 to the display data line SDn. For example, the display driving circuit 112 includes an output buffer circuit 601 and a gamma circuit 602. The gamma circuit 602 is configured to generate and output a gamma voltage to the output buffer circuit 601. The output buffer circuit 601 receives the gamma voltage from the gamma circuit 602 and outputs the gamma voltage (display driving signal) to drive the display pixel 122A via the display data line SD1, the display data line SD2 to the display data line SDn.

[0113] The electronic circuit 110 drives the fingerprint sensor 126 to perform a fingerprint recognition operation through the fingerprint scanning lines GS1, GS2 to GSm and receives a fingerprint sensing signal S3 corresponding to a fingerprint image from the fingerprint sensing lines SO1, SO2 to SOn. For example, the fingerprint sensing circuit 116 (e.g., a readout circuit) includes an input buffer circuit 603, an AFE circuit 604, and an ADC circuit 605. The fingerprint sensing circuit 116 receives the fingerprint sensing signal S3 from the fingerprint sensing lines SO1, SO2 to SOn and can process and output the processed signal to the next stage circuit.

[0114] In the present embodiment, the electronic circuit 110 further includes a switch circuit SW1 (first switch circuit) and operates in a time-division multiplexing manner. In the time-division multiplexing manner, the electronic circuit 110 transmits the display driving signal S2 and receives the fingerprint sensing signal S3 over the shared signal path 140 by means of the switch circuit SW1. The switch circuit SW1 switches to the output terminal of the display driving circuit 112 for transmitting the display driving signal S2 in the display driving phase, and switches to the input terminal of the fingerprint sensing circuit 116 for transmitting the fingerprint sensing signal S3 in the fingerprint sensing phase. Therefore, the pin 118 of the electronic circuit 110 is shared by the display driving circuit 112 and the fingerprint sensing circuit 116.

[0115] refer to Figure 4A , the electronic circuit 110 includes a plurality of first pins 118, and the display panel 120 includes a plurality of second pins 128. The number of the first pins 118 is equal to the number of the second pins 128. Each of the first pins 118 is coupled to the corresponding second pin 128 via a connection line 140. The electronic circuit 110 may be configured to be coupled to the display panel 120 via the first pins 118 and the second pins 128. In the display panel 120, each of the second pins 128 is coupled to a corresponding data line and a corresponding fingerprint sensing line. For example, Figure 5 As shown in FIG. 1 , the data line SDy and the fingerprint sensing line SOy share the same second pin 128 .

[0116] Figure 4B FIG. 2 is a schematic diagram showing an electronic device according to another embodiment of the present invention. Figure 4A and Figure 4B The electronic device 100 of this embodiment and Figure 4A The electronic device 100 is similar to the electronic device 100 described in the embodiment, and the main difference is that the display panel 120 of the present embodiment is an OLED panel. The structure of the display pixel 122B of the OLED panel is different from the structure of the display pixel 122A of the LCD panel.

[0117] in addition, Figure 4A and Figure 4B The fingerprint sensing lines SO1, SO2 to SOn and the display data lines SD1, SD2 to SDn are directly coupled to the corresponding common pins 128 without switching elements, for example, without switching elements. Figure 6 The switching element 129 of the switching circuit SW2.

[0118] Figure 6 FIG. 2 is a schematic diagram showing an electronic device according to another embodiment of the present invention. Figure 4A and Figure 6The electronic device 100 of this embodiment and Figure 4A The electronic device 100 is similar to the electronic device 100 depicted in FIG. 1 , and the main difference is that the display panel 120 of the present embodiment further includes a switch circuit SW2 (a second switch circuit). In the present embodiment, the switch circuit SW2 on the display panel 120 can switch one or more data lines and at least one fingerprint sensing line to share a single pin 128 of the display panel 120, and the shared pin 128 is coupled to the corresponding pin 118 of the electronic circuit 110.

[0119] For example, the switch element 129 of the switch circuit SW2 is switched to the endpoint of the display data line SD1 for transmitting the display drive signal S2 in the display driving stage, and is switched to the endpoint of the fingerprint sensing line SO1 for transmitting the fingerprint sensing signal S3 in the fingerprint sensing stage. Therefore, the pin 128 of the display panel 120 is shared by the display data line SD1 and the fingerprint sensing line SO1, and the pin 128 is coupled to the corresponding pin 118 of the electronic circuit 110.

[0120] In such FIG. 4A to FIG. 6 In the exemplary embodiment disclosed in , the electronic circuit 110 and the display panel 120 have the same number of pins. For the display panel 120, the display data input and the sensing signal output share the same pin, which can reduce the number of pins. The electronic circuit 110 operates in a time division multiplexing manner. The switch circuit SW1 can be switched to output the display data to the display panel 120 or receive the sensing signal from the display panel 120. Therefore, the number of pins of the electronic circuit 110 and the display panel 120 can be reduced, and the wiring therebetween becomes simple.

[0121] Figure 7 and Figure 8 FIG. 2 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 3 , Figure 7 as well as Figure 8 , the electronic circuit 110 includes a switch circuit SW1 (a first switch circuit). The display panel 120 includes a switch circuit SW2 (a second switch circuit). The switch circuit SW1 can be configured to be coupled to the switch circuit SW2 via the transmission line 140. In this embodiment, the switch circuit SW1 is configured in the electronic circuit 110, and the display panel 120 does not include the switch circuit SW1. Therefore, the frame size of the display panel 120 close to the electronic circuit 110 can be reduced.

[0122] The switch circuit SW1 includes a plurality of first terminals N1D and N1F and a plurality of second terminals N2. The number of the first terminals N1D and the first terminals N1F is greater than the number of the second terminals N2. The first terminal N1D is coupled to the display driving circuit 112. In the present embodiment, the display driving circuit 112 includes an output buffer SOP and a signal converter DAC and outputs a display driving 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 may be configured as a switch circuit SW2 coupled to the display panel 120 via the transmission line 140.

[0123] In the present embodiment, the switch circuit SW1 includes a plurality of switch units MUX1. Each of the switch units 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 a corresponding one of the second terminals N2. The first switch element 501 is controlled to transmit the display drive signal S2 from the first circuit 112 in the display drive phase (first time interval). The second switch element 502 is coupled between the second circuit 116 and a corresponding one of the second terminals N2. The second switch element 502 is controlled to transmit the fingerprint sensing signal S3 from the display panel 120 to the second circuit 116 in the fingerprint sensing phase (second time interval).

[0124] The second switch element 502 may include a first switch device 502_1 and a second switch device 502_2. The first switch device 502_1 is coupled to a corresponding one of the second terminals N2 and the second circuit 116. The first switch device 502_1 is controlled to transmit the fingerprint sensing signal S3 to the second circuit 116 in the fingerprint sensing phase. The second switch device 502_2 is coupled between the first switch device 502_1 and the second circuit 116. The second switch device 502_2 is controlled to transmit the fingerprint sensing signal S3 to the second circuit 116 in response to the determination of the touch information in the fingerprint sensing phase. The first switch device 502_1 and the second switch device 502_2 are controlled by different control signals SW1FP and SW3FP, respectively. That is, the control signal SW1FP is asserted in the fingerprint sensing phase and the control signal SW3FP is asserted according to the touch information in the fingerprint sensing phase.

[0125] The switch circuit SW2 includes a plurality of third terminals N3D and N3F and a plurality of fourth terminals N4. The number of the third terminals N3D and the third terminals N3F is greater than the number of the 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 be coupled to the switch circuit SW1 of the electronic circuit 110 via the transmission line 140.

[0126] Specifically, the second switch circuit SW2 includes a plurality of switch units MUX2. Each of the switch units MUX2 includes a plurality of third switch elements 503 and one or more fourth switch elements 504. The third switch element 503 is coupled between the third terminal N3D and the fourth terminal N4. The third switch element 503 is coupled to the data line SDL via the corresponding third terminal N3D and is coupled to the second pin 128 via the corresponding fourth terminal N4. The fourth switch element 504 is coupled between the third terminal N3F and the fourth terminal N4. The fourth switch element 504 is coupled to the fingerprint sensing line FSL via the corresponding third terminal N3F and is coupled to the second pin 128 via the corresponding fourth terminal N4. That is, the third terminal N3D and the first part N3D of the third terminal N3F are coupled to the data line SDL of the display panel 120, and the third terminal N3D and the second part N3F of the third terminal N3F are coupled to the fingerprint sensing line FSL. In the present embodiment, the third switch element 503 is switched to receive the display drive signal S2 from the electronic circuit 110 in the display drive phase. The fourth switch element 504 is switched to transmit the fingerprint sensing signal S3 to the electronic circuit 110 in the fingerprint sensing phase.

[0127] In the present 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 control signals SW1SD, SW1FP, and SW3FP to control corresponding switch elements in the switch circuit SW1, and generates control signals SW2R, SW2G, SW2B, and SW2FP to control corresponding switch elements in the switch circuit SW2.

[0128] In the display driving stage, the control signal SW1SD turns on the corresponding switch element in the switch circuit SW1, and the control signals SW2R, SW2G, and SW2B turn on the corresponding switch element in the switch circuit SW2. The switch circuit SW2 is switched to receive the display drive signal S2 from the electronic circuit 110 in the display driving stage. Specifically, the third switch element 503 is switched to receive the display drive signal S2 from the electronic circuit 110 in the display driving stage. On the other hand, in the display driving stage, the control signals SW1FP and SW3FP turn off the corresponding switch element in the switch circuit SW1, and the control signal SW2FP turns off the corresponding switch element in the switch circuit SW2.

[0129] 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 circuit SW1 and the switch circuit SW2. That is, the control circuit 130 generates the control signal SW1SD, the control signal SW2R, the control signal SW2G and the control signal SW2B for controlling the switch circuit SW1 and the switch circuit SW2 to control the electronic circuit 110 to transmit the display drive signal S2 from the display drive circuit 112 to the data line SDL through the switch circuit SW1 and the switch circuit SW2 in the display drive phase. In the present embodiment, the display pixel 122 includes three sub-pixels, but the present invention is not limited thereto. The display drive signal S2 is an RGB signal in this case, and is transmitted to the corresponding data line SDL on the display panel 120 through the switch circuit SW1 and the switch circuit SW2.

[0130] In the fingerprint sensing stage, the control signal SW1FP and the control signal SW3FP turn on the corresponding switch elements in the switch circuit SW1, and the control signal SW2FP turns on the corresponding switch element in the switch circuit SW2. The switch circuit SW2 is switched to transmit the fingerprint sensing signal S3 from the display panel 120 to the electronic circuit 110 in the fingerprint sensing stage. Specifically, the fourth switch element 504 is switched to transmit the fingerprint sensing signal S3 to the electronic circuit 110 in the fingerprint sensing stage.

[0131] On the other hand, the control signal SW1SD turns off the corresponding switch element in the switch circuit SW1, and the control signals SW2R, SW2G, and SW2B turn off the corresponding switch element in the switch circuit SW2. Therefore, the fingerprint sensing signal S3 is input from the display panel 120 to the electronic circuit 110 via the transmission line 140 and the switch circuits SW1 and SW2. That is, the control circuit 130 generates the control signals SW1FP, SW3FP, and SW2FP for controlling the switch circuits SW1 and SW2 to control the electronic circuit 110 to receive the fingerprint sensing signal S3 from the fingerprint sensor 126 to the AFE circuit 163 of the fingerprint sensing circuit 116 through the switch circuits SW1 and SW2 during the fingerprint sensing phase. In the present embodiment, the transmission line 140 is shared by the display drive signal S2 and the fingerprint sensing signal S3. At different time stages, the display drive signal S2 and the fingerprint sensing signal S3 are transmitted on the transmission line 140.

[0132] In the touch sensing phase (third time interval), the control signals of the corresponding switch elements in the control switch circuit SW1 and the switch circuit SW2 may be appropriately enabled to transmit the signal to the data line SDL and / or the fingerprint sensing line FSL of the display panel 120 to perform the touch sensing operation. For example, the control signal SW2R, the control signal SW2G, the control signal SW2B, and the control signal SW2FP may turn on the corresponding switch elements in the switch circuit SW2 in the touch sensing phase to transmit the signal to the data line SDL and / or the fingerprint sensing line FSL. The signal may be a DC voltage (such as a ground voltage) or other AC voltage that can reduce the parasitic capacitance in the touch sensing operation.

[0133] Alternatively, the control signals for the corresponding switch elements in the switch circuit SW1 and the switch circuit SW2 may be deasserted appropriately to block signal transmission to the data line SDL and / or the fingerprint sensing line FSL of the display panel 120. The control signals SW1SD, SW1FP, and SW3FP may disconnect the corresponding switch elements in the switch circuit SW1, and / or the control signals SW2R, SW2G, SW2B, and SW2FP may disconnect the corresponding switch elements in the switch circuit SW2 during the touch sensing phase to block signal transmission to the data line SDL and / or the fingerprint sensing line FSL. Blocking signal transmission may make the data line SDL and / or the fingerprint sensing line FSL floating to avoid coupling noise from parasitic capacitance during the touch sensing operation. Therefore, the control circuit 130 generates control signals SW1SD, SW1FP, SW3FP and SW2R, SW2G, SW2B, SW2FP for controlling the switch circuit SW1 and the switch circuit SW2, respectively, so as to make the data line SDL and / or the fingerprint sensing line FSL of the display panel 120 float or be coupled to a DC voltage during the touch sensing phase. Since the data line SDL and / or the fingerprint sensing line FSL of the display panel 120 are floated or coupled to a DC voltage, the parasitic capacitance affecting the touch sensing signal can be reduced.

[0134] In this embodiment, the second terminal N2 is coupled to the first pin 118, and the fourth terminal N4 is coupled to the second pin 128. The number of the first pins 118 is equal to the number of the second pins 128. Each of the first pins 118 is coupled to a corresponding data line SDL and a corresponding fingerprint sensing line FSL in the display panel 120 via a corresponding second pin 128.

[0135] Fig.9A FIG. 1 is a schematic diagram showing a detailed structure of a display panel according to an embodiment of the present invention. Fig. 9B To show the control Fig.9AThe waveform diagram of the control signal of the switching element is depicted in FIG. Fig.9A and Fig. 9B In this embodiment, the switch unit MUX2 is a 1:4 multiplexer. In the display driving stage T1, the control signal SW2R, the control signal SW2G and the control signal SW2B sequentially turn on the corresponding switch elements in the switch unit MUX2. In the fingerprint sensing stage T2, the control signal SW2FP turns on the corresponding switch elements in the switch unit MUX2.

[0136] Fig. 9C FIG. 2 is a schematic diagram showing a detailed structure of a display panel according to another embodiment of the present invention. Fig.9A and Fig. 9C The display panel 120 of this embodiment and Fig.9A The display panel 120 is similar to that shown in FIG. 1 , and the main difference is that the switch unit MUX2 is a 1:3 multiplexer in this embodiment. Fig. 9C In the display panel 120, the fingerprint sensing line FSL does not pass through the switch element (eg Fig.9A The switching element 504 is coupled to the pin 128.

[0137] In the display driving stage T1, the control signals SW2R, SW2G and SW2B sequentially turn on the corresponding switch elements in the switch unit MUX2. In the fingerprint sensing stage T2, the fingerprint sensing line FSL is directly coupled to the pin 128, and on the electronic circuit side, the control signal SW1SD turns off the corresponding switch element in the switch circuit SW1, and the control signals SW1FP and SW3FP turn on the corresponding switch element in the switch circuit SW1.

[0138] Fig. 10A FIG. 1 is a schematic diagram showing a detailed structure of a display panel side according to another embodiment of the present invention. Fig. 10B To show the control Fig. 10A The waveform diagram of the control signal of the switching element is depicted in FIG. Fig. 10A and Fig. 10BIn this embodiment, the switch unit MUX2 is a 1:8 multiplexer. That is, in this embodiment, the six data lines SDL of the display pixel 122 and the two fingerprint sensing lines FSL of the fingerprint sensor 126 share a fourth terminal N4 and perform a time multiplexing operation through the shared fourth terminal N4. In the display driving stage T1, the control signal SW2R1, the control signal SW2G1, the control signal SW2B1, the control signal SW2R2, the control signal SW2G2 and the control signal SW2B2 sequentially turn on the corresponding switch elements in the switch unit MUX2. In the fingerprint sensing stage T2, the control signal SW2FP1 and the control signal SW2FP2 sequentially turn on the corresponding switch elements in the switch unit MUX2.

[0139] Fig.11 FIG. 2 is a schematic diagram showing a detailed structure of a display panel according to another embodiment of the present invention. Fig.11 In the present embodiment, the display pixel 122 includes four sub-pixels, such as a red sub-pixel, a green sub-pixel, a blue sub-pixel, and a white sub-pixel, but the present invention is not limited thereto. In this case, the display drive signal S2 is an RGBW signal, and is transmitted to the corresponding data line SDL on the display panel 120 through the switch circuit SW1 and the switch circuit SW2. The switch unit MUX2 is a 1:5 multiplexer. In the display drive stage T1, the control signal SW2R, the control signal SW2G, the control signal SW2B, and the control signal SW2W sequentially turn on the corresponding switch elements in the switch unit MUX2. In the fingerprint sensing stage T2, the control signal SW2FP turns on the corresponding switch elements in the switch unit MUX2.

[0140] Fig.12 FIG. 1 is a schematic diagram showing a fan-out region of an electronic circuit according to an embodiment of the present invention. Fig.13 FIG. 1 is a schematic diagram showing a fan-out area corresponding to an electronic circuit in the related art. Figure 7 and Figure 8 In the embodiment of the present invention, the electronic circuit 110 is connected via the same I / O node (eg Figure 8100 ) outputs the display drive signal S2 to the display panel 120 and receives the fingerprint sensing signal S3 from the display panel 120. In different stages, the display drive signal S2 and the fingerprint sensing signal S3 are transmitted on the transmission line 140, and the transmission line 140 is 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 area 910 corresponding to the electronic circuit 110 is smaller than the width W0 of the fan-out area 91 corresponding to the electronic circuit 110. The size of the border close to the electronic circuit 110 in the display panel 120 can be reduced. For example, in the present embodiment, even if the fingerprint sensing function is integrated into the electronic device 100, the border size can be kept within a specific width, such as 2 mm.

[0141] Fig.14 FIG. 1 is a schematic diagram illustrating the operation of a display panel for fingerprint sensing according to an embodiment of the present invention. Fig.15 FIG. 2 is a schematic diagram showing a wiring structure of an electronic circuit according to an embodiment of the present invention. Figure 7 , Figure 8 , Fig.14 as well as Fig.15 , the electronic circuit 110 can drive and control the display panel 120 to sense one or more fingerprint images FPI_1, FPI_2, FPI_3 and FPI_4 presented on the display panel 120. In this embodiment, the fingerprint sensing lines FSL extend in the direction Y (e.g., the vertical direction) and are arranged in parallel in the direction X (e.g., the horizontal direction), such as Figure 2 As shown in . The display panel 120 is not pre-fixedly divided into fingerprint sensing areas for fingerprint sensing at least in the direction X. That is, the display panel 120 does not have a fingerprint sensing area pre-determined for the fingerprint sensing line FSL in the X direction. The size and shape of the fingerprint sensing area are not predetermined. The fingerprint sensing area 401, the fingerprint sensing area 402, the fingerprint sensing area 403, and the fingerprint sensing area 404 can be flexibly formed for fingerprint sensing by selecting a portion of the fingerprint sensing lines FSL among the multiple fingerprint sensing lines FSL configured above the display panel 120. The edges or boundaries of the fingerprint sensing areas 401, 402, 403, and 404 may correspond to any of the fingerprint sensing lines FSL without restriction. Since there is no predetermined fingerprint sensing area in the X direction, there is no need to perform cross over sensing during the sensing process to process signals from different fingerprint sensing areas. Cross over sensing generally requires more fingerprint sensing time and may cause sensing delay.

[0142] Specifically, the control circuit 130 is based on the Figure 2The touch sensing signal S1 output by the touch sensing line TSL depicted in the figure is used to determine one or more touch areas TSA corresponding to the fingerprint image FPI_1, the fingerprint image FPI_2, the fingerprint image FPI_3 and the fingerprint image FPI_4. The control circuit 130 can determine the size and range (Size / Range) for the touch area TSA. The range of the touch area TSA can be determined by the touch area of ​​the finger or can be a predetermined value. Alternatively, in one embodiment, the control circuit 130 can determine the coordinate information of the center or the vicinity of the center of each touch area TSA and determine the size of the touch area TSA. The size of each touch area TSA can be determined according to 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 covering the fingerprint image. In the fingerprint sensing stage, the control circuit 130 enables the control signal SW1FP, and controls the first switch device 502_1 to be turned on by using the enabled control signal SW1FP. On the other hand, in the fingerprint sensing stage, the control circuit 130 validates the control signal SW3FP according to 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 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. Fig.15 In the embodiment of the present invention, the second switch device 502_2 corresponding to the selected fingerprint sensing line FSL is turned on according to the valid control signal SW3FP, and the second switch device 502_2 corresponding to the unselected fingerprint sensing line FSL is turned off according to the invalid 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. That is, the touch sensing circuit 114 determines the touch information according to 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 determination of the touch information. The fingerprint sensing circuit 116 receives the fingerprint sensing signal S3 through the fingerprint sensing line FSL of the display panel 120 selected according to the touch information.

[0143] By controlling the conduction state of the second switch device 502_2, a fingerprint sensing line FSL corresponding to the touch area TSA on the display panel 120 is selected from the plurality of fingerprint sensing lines FSL above the display panel 120. In the present embodiment, a portion of the fingerprint sensing lines FSL can be flexibly selected to form a fingerprint sensing area 401, a fingerprint sensing area 402, a fingerprint sensing area 403 or a fingerprint sensing area 404, the size and range of which are determined by the touch area TSA. Therefore, the AFE circuit 163 can receive the fingerprint sensing signal of the fingerprint image FPI_1, the fingerprint image FPI_2, the fingerprint image FPI_3 or the fingerprint image FPI_4 in a single-turn in the horizontal direction (X direction), without performing the cross-region cross sensing operation. Therefore, the problem of cross-region cross sensing when receiving the fingerprint sensing signal of the fingerprint image FPI_1, the fingerprint image FPI_2, the fingerprint image FPI_3 or the fingerprint image FPI_4 in the horizontal direction can be solved, thereby reducing the fingerprint sensing time.

[0144] exist Fig.15 In the embodiment, the switch circuit SW1 includes a plurality of switch units MUX1, and each of the switch units 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.

[0145] In this embodiment, the number of the first pins 118 is equal to the number of the second pins 128. Each of the first pins 118 is coupled to a corresponding data line SDL ( Fig.15 (not shown) and the corresponding fingerprint sensing line FSL.

[0146] In the present 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 divided into a plurality of groups and are coupled 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. Each second switch component 502 can be controlled by the control circuit 130. The second switch element 502 includes a first switch device 502_1 and a second switch device 502_2 ... according to the touch information (e.g. Fig.14The touch area TSA depicted in FIG. 1 is used to determine which second switch element 502 is turned on or off. That is, the second switch device 502_2 can be controlled to transmit the fingerprint sensing signal S3 to the fingerprint sensing circuit 116 in response to the determination of the touch information (e.g., the touch area TSA) in the fingerprint sensing phase, and turn on the corresponding first switch device 502_1. The turned-on second switch element 502 establishes the coupling between the fingerprint sensing line FSL and the fingerprint sensing channel for the fingerprint sensing operation.

[0147] In the present embodiment, the wire grouping circuit 119 is coupled between the switch circuit SW1 and the AFE circuit 163 for coupling the plurality of fingerprint sensing lines FSL to each of the sensing channels in the AFE circuit 163 in a wire-OR manner. By grouping the second switch elements, the wire grouping circuit 119 divides the fingerprint sensing lines FSL into a plurality of groups, and the groups are correspondingly coupled to the fingerprint sensing channels in the AFE circuit 163. Each group of the fingerprint sensing lines FSL corresponds to one fingerprint sensing channel. For example, the AFE circuit 163 may be designed to have 200 fingerprint sensing channels, and the number of the fingerprint sensing lines FSL is 1000. The 1000 fingerprint sensing lines are divided into 200 groups, each having five fingerprint sensing lines. The first fingerprint sensing line, the 201st fingerprint sensing line, the 401st fingerprint sensing line, the 601st fingerprint sensing line, and the 801st fingerprint sensing line are coupled to each other and coupled to the first fingerprint sensing channel in the same group via the corresponding switch device 502_1 and the switch device 502_2 and the wire grouping circuit 119. Similarly, the second fingerprint sensing line, the 202nd fingerprint sensing line, the 402nd fingerprint sensing line, the 602nd fingerprint sensing line, and the 802nd fingerprint sensing line are coupled to each other and coupled to the second fingerprint sensing channel in the same group via the corresponding switch devices 502_1 and 502_2 and the wire grouping circuit 119. The connection relationship of the remaining fingerprint sensing lines and fingerprint sensing channels can be deduced in the same way. In the same group, the fingerprint sensing lines FSL are coupled in a wired-OR manner and are not short-circuited at the same time.

[0148] 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 only used for illustration, and the present invention is not limited thereto.

[0149] The control circuit 130 generates a control signal SW1FP, a control signal SW1SD, and a control signal SW3FP for controlling the switch circuit SW1 to control the electronic circuit 110 to receive the fingerprint sensing signal S3 from the fingerprint sensor 126 to the AFE circuit 163 through the switch circuit SW1 in the fingerprint sensing stage. In the fingerprint sensing stage, the control signal SW1FP and the control signal SW3FP turn on the corresponding switch element in the switch circuit SW1, and the control signal SW1SD turns off the corresponding switch element in 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. In the fingerprint sensing stage, the control signal SW1FP is enabled, and in the fingerprint sensing stage, the control signal SW3FP is enabled according to the touch information. That is, in the switch circuit SW1, the transmission path between the first terminal N1F and the second terminal N2 is turned on according to the touch information. Therefore, the electronic circuit 110 receives the fingerprint sensing signal S3 from the fingerprint sensor 126 through the switch circuit SW1.

[0150] Fig.16 FIG. 2 is a schematic diagram showing a wiring structure of an electronic circuit according to another embodiment of the present invention. Fig.15 and Fig.16 The electronic circuit 110 of this embodiment and Fig.15 The electronic circuit 110 is similar to the electronic circuit 110 depicted in FIG. 1 , and the main difference therebetween is that the second switch element 502 of this embodiment is controlled by the control signal SW13FP. In this embodiment, according to design requirements, Fig.15 The second switch device 502_2 can be Fig.16 is omitted or considered to be combined with the first switch device 502_1 to form Fig.16 The second switching element 502 is depicted in FIG.

[0151] Specifically, in the fingerprint sensing stage, the control circuit 130 validates the control signal SW13FP according to the touch information. The control circuit 130 controls a portion of the second switch element 502 to be turned on by using the validated control signal SW13FP. The second switch element 502 that is turned on according to the touch area TSA (that is, the touch information) can select a portion of the fingerprint sensing line FSL for the fingerprint sensing operation. That is, the second switch element 502 corresponding to the selected fingerprint sensing line FSL will be turned on. Fig.16 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.

[0152] 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 only used for illustration, and the present invention is not limited thereto.

[0153] In addition, the operation of the electronic circuit 110 of this embodiment can be Fig.14 and Fig.15 Sufficient teaching, suggestions and implementation instructions are obtained from the embodiments of the present invention, so no further description is provided herein.

[0154] Fig.17A and Fig. 17B FIG. 2 is a schematic diagram showing a wiring structure of an electronic circuit according to another embodiment of the present invention. Fig.15 , Fig.17A as well as Fig. 17B The electronic circuit 110 of this embodiment and Fig.15 The electronic circuit 110 is similar to the electronic circuit 110 depicted in FIG. 1 , and the main difference therebetween is that each of the switch units MUX1 further comprises a fifth switch element 505 corresponding to the touch sensing circuit 114. The fifth switch element 505 is controlled by a control signal SW1TP.

[0155] The touch sensing circuit 114 outputs a touch driving signal S6 for driving the touch sensor 124. The touch driving signal S6 may be transmitted as follows: Figure 2 1 to drive the touch sensor 124. The first terminal N1T of the switch circuit SW1 is coupled to the touch sensing circuit 114. The fifth switch element 505 can be controlled by the control circuit 130 to output the synchronous driving signal S7 to the data line SDL and / or the fingerprint sensing line FSL in the touch sensing phase.

[0156] Fig.18A To illustrate a method for controlling the Fig.17A and Fig. 17B. In the touch sensing stage T3, the control circuit 130 generates control signals SW1TP, SW1SD, SW1FP, and SW3FP for controlling the switch circuit SW1, and generates control signals SW2R, SW2G, SW2B, and SW2FP for controlling the switch circuit SW2, so as to control the electronic circuit 110 to transmit the synchronous driving signal S7 to the data line SDL and / or the fingerprint sensing line FSL of the display panel 120 through the switch circuit SW1 and the switch circuit SW2. For example, in the touch sensing stage T3, the control signal SW1TP can turn on the fifth switch element 505 of the switch circuit SW1, and the control signals SW2R, SW2G, SW2B, and SW2FP can turn on the third switch element 503 and the fourth switch element 504 of the switch circuit SW2, so that the synchronous driving signal S7 is simultaneously transmitted to the data line SDL and the fingerprint sensing line FSL when the touch sensing operation is performed. On the other hand, the control signals SW1SD, SW1FP, and SW3FP disconnect the corresponding switch elements 501 and 502 in the switch circuit SW1 in the touch sensing phase T3. In the present embodiment, the synchronous drive signal S7 may have the same phase, frequency, and / or waveform (i.e., the same phase, frequency, and amplitude) as the touch drive signal S6. When performing a touch sensing operation, since the data line SDL and the fingerprint sensing line FSL are driven by the synchronous drive signal S7 having the same phase, frequency, and / or waveform as the touch drive signal S6, the parasitic capacitance affecting the touch sensing signal S1 may be reduced. In some other embodiments, a DC voltage such as a ground voltage may also be applied to the data line SDL and / or the fingerprint sensing line FSL in the touch sensing phase T3. There are many ways to control the switch elements of the switch circuit SW1 and the switch circuit SW2 so that the data line SDL and / or the fingerprint sensing line FSL are coupled to the DC voltage from the DC voltage source. For example, a DC voltage may be provided from the touch sensing circuit 114 to replace the synchronous driving signal S7 , so that the data line SDL and / or the fingerprint sensing line FSL may be coupled to the DC voltage through the same conduction path as the synchronous driving signal S7 .

[0157] In the display driving phase T1 and the fingerprint sensing phase T2, the control signal for controlling the operation of the electronic circuit 110 may be Figures 4A to 11 Sufficient teaching, suggestions and implementation instructions are obtained from the embodiments of the present invention, so no further description is provided herein.

[0158] Fig.18B To illustrate a method for controlling a Fig.17A and Fig. 17B The waveform diagram of the control signal of the switching element. Fig.17A , Fig. 17B as well as Fig.18B In this embodiment, the control signals SW2R, SW2G, SW2B, and SW2FP can respectively disconnect the switch element 503 and the switch element 504 of the switch circuit SW2, so that the synchronous driving signal S7 cannot be transmitted to the data line SDL and / or the fingerprint sensing line FSL of the display panel 120 in the touch sensing phase T3, so the data line SDL and / or the fingerprint sensing line FSL are floating, that is, in a high impedance (Hi-Z) state. In addition to the above-mentioned methods, there are still other methods to control the switch circuit SW1 and the switch circuit SW2 to make the data line SDL and / or the fingerprint sensing line FSL float. For example, at least the control signal SW1SD and the control signal SW1TP can be disabled to respectively disconnect the switch element 501 and the switch element 505 of the switch circuit SW1 to make the data line SDL and / or the fingerprint sensing line FSL float. That is, in any possible manner, the control circuit 130 generates the control signals SW1TP, SW1SD, SW1FP, SW3FP and SW2R, SW2G, SW2B, SW2FP for controlling the first switch circuit SW1 and the second switch circuit SW2, so as to make the data line SDL and / or the fingerprint sensing line FSL of the display panel 120 float in the touch sensing phase T3. Since the data line SDL and / or the fingerprint sensing line FSL of the display panel 120 are floated, the flow of charges is blocked, thereby reducing the parasitic capacitance affecting the touch sensing signal.

[0159] In addition, the operation of the electronic circuit 110 of this embodiment can be Figures 15 to 18A Sufficient teaching, suggestions and implementation instructions are obtained from the embodiments of the present invention, so no further description is provided herein.

[0160] Fig.19 FIG. 1 is a schematic diagram showing the detailed structure of a fingerprint sensor according to an embodiment of the present invention. Fig.19, 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 selection transistor SEL. The gate terminals of the reset transistor RST, the transfer transistor TX, and the row selection transistor SEL are controlled by a control signal RSTc, a control signal TXc, and a control signal SELc, respectively. These control signals are used for fingerprint scanning control and are enabled only in the fingerprint sensing phase T2. In other words, the row selection transistor SEL of the fingerprint sensor 126 is disconnected in the touch sensing phase T3, 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 in the touch sensing phase T3. This helps control the switch circuit SW1 and the switch circuit SW2 to transmit the synchronous drive signal S7 to the fingerprint sensing line FSL in the touch sensing phase T3. In addition, sufficient teachings, suggestions, and implementation instructions for the operation of the fingerprint sensor 126 can be obtained by referring to the common knowledge in the relevant technology, so it is not repeated here.

[0161] In summary, in an embodiment of the present invention, the electronic circuit and the display panel have the same number of pins. For the display panel, the display data input and the sensing signal output share the same pin, which can reduce the number of pins of the electronic circuit and the display panel. In different stages, the display drive signal and the fingerprint sensing signal are transmitted on the same transmission line. The transmission line is shared by the display drive signal and the fingerprint sensing signal. The electronic circuit outputs the display drive signal to the display panel via the same pin coupled to the transmission line and receives the fingerprint sensing signal from the display panel. The wiring between the electronic circuit and the display panel is relatively simple. The width of the fan-out area corresponding to the electronic circuit and the size of the border close to the electronic circuit in the display panel are small.

[0162] In addition, the touch area is determined to form a sensing area for the fingerprint image. The control circuit selects a portion of the fingerprint sensing line for the fingerprint sensing operation according to the touch area. The switch corresponding to the selected fingerprint sensing line is turned on to couple the selected fingerprint sensing line to the fingerprint sensing channel of the fingerprint sensing circuit. By selecting a fingerprint sensing line corresponding to the touch area from a plurality of fingerprint sensing lines of the display panel, a fingerprint sensing area whose size / range is determined by the touch area can be flexibly formed, so that the fingerprint sensing channel can receive the fingerprint sensing signal at one time in the horizontal direction, which can reduce the time of fingerprint sensing. Therefore, the method for fingerprint sensing and identification is more efficient, and the user has a good user experience.

[0163] 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 invention. In view of the foregoing, it is intended that the present invention encompass modifications and variations within the scope of the appended claims and their equivalents.

Claims

1. An electronic circuit, suitable for driving 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 a fingerprint sensing line of the display panel; as well as a first switch circuit, comprising a plurality of first terminals and a plurality of second terminals, wherein the first terminals are coupled to the first circuit and the second circuit, and the second terminals are configurable to be coupled to the display panel via a plurality of first pins of the electronic circuit, Each of the first pins can be configured to be coupled to a corresponding data line and a corresponding fingerprint sensing line in the display panel, The fingerprint sensing line and the data line are independent lines, and the fingerprint sensing line and the data line are located on the display panel. Each of the first pins is an external terminal of the electronic circuit, and the width of the fan-out area corresponding to the electronic circuit and the size of the frame of the display panel close to the electronic circuit are smaller.

2. The electronic circuit according to claim 1, wherein the display panel further comprises a plurality of second pins, each of the second pins being coupled to the corresponding data line and the corresponding fingerprint sensing line in the display panel, and The number of the first pins is equal to the number of the second pins, and each of the first pins may be configured to be coupled to the corresponding data line and the corresponding fingerprint sensing line in the display panel via the corresponding second pin.

3. The electronic circuit according to claim 1, further comprising: a control circuit configured to generate a control signal for controlling the first switch circuit to controlling the electronic circuit to transmit the display drive signal from the first circuit to the data line through the first switch circuit 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 first switching circuit in a second time interval. 4 . The electronic circuit according to claim 3 , wherein the first time interval corresponds to a display driving phase, and the second time interval corresponds to a fingerprint sensing phase. The electronic circuit according to claim 3 , wherein the number of the first terminals is greater than the number of the second terminals.

6. The electronic circuit according to claim 3, wherein the first switch circuit comprises a plurality of switch units, and each of the switch units of the first switch circuit comprises: a first switch element coupled between the first circuit and a corresponding one of the second terminals and controlled to transmit the display drive signal from the first circuit in the first time interval; and A second switch element 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.

7. The electronic circuit according to claim 6, further comprising: A wire grouping circuit is coupled between the second circuit and the first switch circuit, wherein the second switch elements are divided into a plurality of groups and are coupled to the second circuit through the wire grouping circuit.

8. The electronic circuit according to claim 3, wherein The first circuit generates the display driving signal for driving the data line through a second switch circuit on the display panel, wherein the second end of the first switch circuit is configurable to be coupled to the second switch circuit; The second circuit receives the fingerprint sensing signal corresponding to the fingerprint image from the fingerprint sensor through the second switch circuit; as well as The control circuit generates the control signal for further controlling the second switch circuit to controlling the electronic circuit and the second switch circuit to transmit the display drive signal from the first circuit to the data line through the first switch circuit and the second switch circuit in the first time interval, and The electronic circuit and the second switch circuit are controlled to receive the fingerprint sensing signal from the fingerprint sensor through the second switch circuit and the first switch circuit in the second time interval.

9. The electronic circuit according to claim 8, wherein The control circuit generates the control signal for further controlling the second switch circuit to The electronic circuit and the second switch circuit are controlled to make the data line and / or the fingerprint sensing line of the display panel float in a third time interval corresponding to a touch sensing phase.

10. The electronic circuit according to claim 3, further comprising: A third circuit is configured to output a touch driving signal for driving the touch sensor and receive a touch sensing signal from the touch sensor, wherein the first end of the first switch circuit is further coupled to the third circuit. 11 . The electronic circuit according to claim 10 , wherein the third circuit determines touch information according to the touch sensing signal, and the second circuit receives the fingerprint sensing signal through a fingerprint sensing line of the display panel selected according to the touch information.

12. The electronic circuit according to claim 11, wherein the first switch circuit comprises a plurality of switch elements, the switch elements are configured to transmit the fingerprint sensing signal to the second circuit, and a portion of the switch elements are turned on to transmit the fingerprint sensing signal to the second circuit according to the touch information.

13. The electronic circuit according to claim 10 , wherein the control circuit generates the control signal for controlling the first switch circuit to The electronic circuit is controlled to transmit a synchronous driving signal having the same phase as the touch driving signal to the data line and / or the fingerprint sensing line of the display panel through the first switching circuit in a third time interval corresponding to a touch sensing phase. The electronic circuit according to claim 13 , wherein the synchronization driving signal has the same waveform as the touch driving signal.

15. The electronic circuit according to claim 10, wherein The control circuit generates the control signal for controlling the first switch circuit. The data line and / or the fingerprint sensing line of the display panel is made to be floating in a third time interval corresponding to a touch sensing phase.

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

17. A display panel, comprising: a plurality of pixels and a plurality of fingerprint sensors, wherein the fingerprint sensors are configured to sense a fingerprint image and generate a fingerprint sensing signal corresponding to the fingerprint image; a plurality of data lines coupled to the pixels and configured to receive display drive signals; a plurality of fingerprint sensing lines coupled to the fingerprint sensor and configured to transmit the fingerprint sensing signal; as well as a plurality of pins, wherein each of the pins is coupled to a corresponding data line and a corresponding fingerprint sensing line, The fingerprint sensing line and the data line are independent lines, and the fingerprint sensing line and the data line are located on the display panel. The width of the fan-out area corresponding to the electronic circuit and the size of the frame of the display panel close to the electronic circuit are smaller. The pins of the display panel may be configured to be coupled to a plurality of pins of an electronic circuit, and the electronic circuit is suitable for driving the display panel. 18 . The display panel according to claim 17 , wherein the number of the pins of the display panel is equal to the number of the pins of the electronic circuit.

19. The display panel according to claim 17, further comprising: A switch circuit includes a plurality of first ends and a plurality of second ends, wherein the first ends are coupled to the data lines and the fingerprint sensing lines, and the second ends are configurable to be coupled to an electronic circuit, wherein the switch circuit is switched to receive the display driving signal from the electronic circuit in a first time interval, and the switch circuit is switched to transmit the fingerprint sensing signal to the electronic circuit in a second time interval.

20. The display panel according to claim 19, wherein the switch circuit comprises: A plurality of first switch elements are coupled to the data line via respective first ends and to the pin via respective second ends, and the first switch elements are switched to receive the display driving signal from the electronic circuit in the first time interval. 21 . The display panel of claim 20 , wherein the fingerprint sensing line is not coupled to the pin via a switching element.

22. The display panel according to claim 20, wherein the switch circuit further comprises: A plurality of second switch elements are coupled to the fingerprint sensing line via the corresponding first ends and to the pin via the corresponding second ends, and the second switch elements are switched to transmit the fingerprint sensing signal to the electronic circuit in the second time interval. 23 . The display panel according to claim 22 , wherein the first time interval corresponds to a display driving phase, and the second time interval corresponds to a fingerprint sensing phase.

24. The display panel according to claim 22, wherein the number of the first switching elements is greater than the number of the second switching elements. 25 . The display panel according to claim 19 , wherein the switch circuit is switched to make the data line and / or the fingerprint sensing line floating in a third time interval corresponding to a touch sensing phase.

26. The display panel according to claim 19, wherein the switch circuit is switched to transmit a synchronous drive signal having the same phase as a touch drive signal to the data line and / or the fingerprint sensing line in a third time interval corresponding to a touch sensing phase. 27 . The display panel according to claim 26 , wherein the synchronization driving signal has the same waveform as the touch driving signal.

28. An electronic device comprising: A display panel, including a plurality of data lines and a plurality of fingerprint sensing lines; and an electronic circuit adapted to drive the display panel with a display driving signal and to receive a fingerprint sensing signal corresponding to a fingerprint image from the fingerprint sensing line, wherein the electronic circuit comprises a plurality of first pins, the display panel comprises a plurality of second pins, the number of the first pins is equal to the number of the second pins, and the electronic circuit is coupled to the display panel via the first pins and the second pins, wherein each of the second pins is coupled to a corresponding data line and a corresponding fingerprint sensing line in the display panel, and each of the first pins is coupled to the corresponding data line and the corresponding fingerprint sensing line of the display panel via the corresponding second pin, The fingerprint sensing line and the data line are independent lines, and the fingerprint sensing line and the data line are located on the display panel. Each of the first pins is an external terminal of the electronic circuit, and the width of the fan-out area corresponding to the electronic circuit and the size of the frame of the display panel close to the electronic circuit are smaller.

29. The electronic device of claim 28, wherein the electronic circuit comprises: a first switching circuit; a first circuit configured to generate the display driving signal for driving the data line of the display panel through a second switch circuit, wherein the display panel further includes the second switch circuit; as well as A second circuit is configured to receive the fingerprint sensing signal corresponding to the fingerprint image from the fingerprint sensing line through the second switch circuit, wherein the first switch circuit includes a plurality of first ends coupled to the first circuit and the second circuit and a plurality of second ends of the second switch circuit coupled to the display panel via the first pin and the second pin.

30. The electronic device of claim 29, wherein the number of the first ends is greater than the number of the second ends.

31. The electronic device of claim 29, wherein the electronic circuit further comprises: a control circuit configured to generate a control signal for controlling the first switch circuit and the second switch circuit to controlling the electronic circuit to transmit the display drive signal from the first circuit to the data line through the first switch circuit and the second switch circuit in a first time interval, and The electronic circuit is controlled to receive the fingerprint sensing signal from the fingerprint sensing line of the display panel through the second switching circuit and the first switching circuit in a second time interval.

32. The electronic device of claim 31, wherein the first time interval corresponds to a display driving phase, and the second time interval corresponds to a fingerprint sensing phase.

33. The electronic device according to claim 31, wherein the first switch circuit comprises a plurality of switch units, and each of the switch units of the first switch circuit comprises: a first switch element coupled between the first circuit and a corresponding one of the second terminals and controlled to transmit the display drive signal from the first circuit in the first time interval; and A second switch element 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.

34. The electronic device of claim 33, wherein the electronic circuit further comprises: A wire grouping circuit is coupled between the second circuit and the first switch circuit, wherein the second switch elements are divided into a plurality of groups and are coupled to the second circuit through the wire grouping circuit.

35. The electronic device according to claim 31, wherein The control circuit generates the control signal for further controlling the second switch circuit to The electronic circuit and the second switch circuit are controlled to make the data line and / or the fingerprint sensing line of the display panel float in a third time interval corresponding to a touch sensing phase.

36. The electronic device according to claim 31, wherein the display panel further comprises a touch sensor, and the electronic circuit further comprises: A third circuit is configured to output a touch driving signal for driving the touch sensor and receive a touch sensing signal from the touch sensor, wherein the first end of the first switch circuit is further coupled to the third circuit.

37. The electronic device according to claim 36, wherein the third circuit determines touch information according to the touch sensing signal, and the second circuit receives the fingerprint sensing signal through a fingerprint sensing line of the display panel selected according to the touch information.

38. The electronic device according to claim 37, wherein the first switch circuit comprises a plurality of switch elements configured to transmit the fingerprint sensing signal to the second circuit, and a portion of the switch elements are turned on to transmit the fingerprint sensing signal to the second circuit according to the touch information.

39. The electronic device according to claim 36, wherein the control circuit generates the control signal for controlling the first switch circuit to The electronic circuit is controlled to transmit a synchronous driving signal having the same phase as the touch driving signal to the data line and / or the fingerprint sensing line of the display panel through the first switching circuit in a third time interval corresponding to a touch sensing phase. 40 . The electronic device according to claim 39 , wherein the synchronization driving signal has the same waveform as the touch driving signal.

41. The electronic device of claim 36, wherein The control circuit generates the control signal for controlling the first switch circuit. The data line and / or the fingerprint sensing line of the display panel is made to be floating in a third time interval corresponding to a touch sensing phase.

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

43. The electronic device according to claim 28, wherein the display panel further comprises: a plurality of pixels and a plurality of fingerprint sensors, wherein the data lines are coupled to the pixels and configured to receive the display driving signals, and the fingerprint sensing lines are coupled to the fingerprint sensors and configured to transmit the fingerprint sensing signals; and A second switch circuit has a plurality of first ends and a plurality of second ends, wherein the first ends are coupled to the data line and the fingerprint sensing line and the second ends are coupled to the electronic circuit, wherein the second switch circuit is switched to receive the display driving signal from the electronic circuit in a first time interval, and the second switch circuit is switched to transmit the fingerprint sensing signal to the electronic circuit in a second time interval.

44. The electronic device according to claim 43, wherein the second switch circuit comprises: A plurality of first switch elements are coupled to the data line via respective first ends and to the second pin via respective second ends, and the first switch elements are switched to receive the display driving signal from the electronic circuit in the first time interval.

45. The electronic device of claim 44, wherein the fingerprint sensing line is not coupled to the second pin via a switching element.

46. ​​The electronic device according to claim 44, wherein the second switch circuit further comprises: A plurality of second switch elements are coupled to the fingerprint sensing line via the corresponding first ends and to the second pin via the corresponding second ends, and the second switch elements are switched to transmit the fingerprint sensing signal to the electronic circuit in the second time interval.

47. The electronic device of claim 46, wherein the first time interval corresponds to a display driving phase, and the second time interval corresponds to a fingerprint sensing phase.

48. The electronic device according to claim 46, wherein the number of the first switching elements is greater than the number of the second switching elements.

49. The electronic device of claim 43, wherein the second switch circuit is switched to make the data line and / or the fingerprint sensing line floating in a third time interval corresponding to a touch sensing phase.

50. The electronic device according to claim 43, wherein the second switch circuit is switched to transmit a synchronous drive signal having the same phase as a touch drive signal to the data line and / or the fingerprint sensing line in a third time interval corresponding to a touch sensing phase. The electronic device according to claim 50 , wherein the synchronization driving signal has the same waveform as the touch driving signal.

52. An electronic circuit, suitable for driving 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 a fingerprint sensing line of the display panel; a third circuit configured to determine touch information according to a touch sensing signal from the touch sensor, wherein the second circuit receives the fingerprint sensing signal through a fingerprint sensing line of the display panel selected according to the touch information; as well as a first switch circuit, comprising a plurality of first terminals and a plurality of second terminals, wherein the first terminals are coupled to the first circuit and the second circuit, and the second terminals are configurable to be coupled to the display panel via a plurality of first pins of the electronic circuit, Each of the first pins can be configured to be coupled to a corresponding data line and a corresponding fingerprint sensing line in the display panel, The fingerprint sensing line and the data line are independent lines, and the fingerprint sensing line and the data line are located on the display panel. Each of the first pins is an external terminal of the electronic circuit, and the width of the fan-out area corresponding to the electronic circuit and the size of the frame of the display panel close to the electronic circuit are smaller.

53. The electronic circuit according to claim 52, wherein the display panel further comprises a plurality of second pins, each of the second pins being coupled to the corresponding data line and the corresponding fingerprint sensing line of the display panel, and The number of the first pins is equal to the number of the second pins, and each of the first pins may be configured to be coupled to the corresponding data line and the corresponding fingerprint sensing line of the display panel via the corresponding second pin.

54. The electronic circuit of claim 52, further comprising: a control circuit configured to generate a control signal for controlling the first switch circuit to controlling the electronic circuit to transmit the display drive signal from the first circuit to the data line through the first switch circuit 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 first switching circuit in a second time interval.

55. The electronic circuit of claim 54, wherein the first time interval corresponds to a display driving phase and the second time interval corresponds to a fingerprint sensing phase.

56. The electronic circuit of claim 54, wherein the number of the first terminals is greater than the number of the second terminals.

57. The electronic circuit according to claim 54, wherein the first switch circuit comprises a plurality of switch units, and each of the switch units of the first switch circuit comprises: a first switch element coupled between the first circuit and a corresponding one of the second terminals and controlled to transmit the display drive signal from the first circuit in the first time interval; and A second switch element 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.

58. The electronic circuit of claim 57, further comprising: A wire grouping circuit is coupled between the second circuit and the first switch circuit, wherein the second switch elements are divided into a plurality of groups and are coupled to the second circuit through the wire grouping circuit.

59. The electronic circuit of claim 54, wherein The first circuit generates the display driving signal for driving the data line through a second switch circuit on the display panel, wherein the second end of the first switch circuit is configurable to be coupled to the second switch circuit; The second circuit receives the fingerprint sensing signal corresponding to the fingerprint image from the fingerprint sensor through the second switch circuit; as well as The control circuit generates the control signal for further controlling the second switch circuit to controlling the electronic circuit and the second switch circuit to transmit the display drive signal from the first circuit to the data line through the first switch circuit and the second switch circuit in the first time interval, and The electronic circuit and the second switch circuit are controlled to receive the fingerprint sensing signal from the fingerprint sensor through the second switch circuit and the first switch circuit in the second time interval.

60. The electronic circuit of claim 59, wherein The control circuit generates the control signal for further controlling the second switch circuit to The electronic circuit and the second switch circuit are controlled to make the data line and / or the fingerprint sensing line of the display panel float in a third time interval corresponding to a touch sensing phase.

61. An electronic circuit according to claim 54, wherein the third circuit is further configured to output a touch drive signal for driving the touch sensor and receive the touch sensing signal from the touch sensor, wherein the first end of the first switching circuit is further coupled to the third circuit.

62. An electronic circuit according to claim 61, wherein the first switching circuit includes a plurality of switching elements configured to transmit the fingerprint sensing signal to the second circuit, and a portion of the switching elements are turned on to transmit the fingerprint sensing signal to the second circuit based on the touch information.

63. The electronic circuit according to claim 61, wherein the control circuit generates the control signal for controlling the first switch circuit to The electronic circuit is controlled to transmit a synchronous driving signal having the same phase as the touch driving signal to the data line and / or the fingerprint sensing line of the display panel through the first switching circuit in a third time interval corresponding to a touch sensing phase.

64. The electronic circuit of claim 63, wherein the synchronization drive signal has the same waveform as the touch drive signal.

65. The electronic circuit of claim 61 , wherein The control circuit generates the control signal for controlling the first switch circuit. The data line and / or the fingerprint sensing line of the display panel is made to be floating in a third time interval corresponding to a touch sensing phase.

66. The electronic circuit of claim 54, wherein the electronic circuit is implemented in a semiconductor chip.

Images