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

Abstract

The present invention provides an electronic circuit with display driving, touch sensing and fingerprint sensing functions, which 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 first switch circuit and a control circuit. The first circuit generates a display driving signal for driving the display panel. The second circuit receives a fingerprint sensing signal from a fingerprint sensor. The first switch circuit is coupled to the second switch circuit on the display panel. The control circuit generates a control signal for controlling the first switch circuit and the second switch circuit, so as to control the electronic circuit to transmit the display driving 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 to control the electronic circuit to receive the fingerprint sensing signal from the fingerprint sensor through the first switch circuit and the second switch circuit in a second time interval.

Description

Technical Field

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

[0002] In recent years, the demand for fingerprint sensing has gradually increased. In order to reduce the size of 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 specified interface. Subsequently, the application processor further controls the display driving circuit to drive the display panel to display an image for fingerprint sensing. On the other hand, the application processor further controls the fingerprint sensing circuit to perform a fingerprint sensing operation. The fingerprint sensing circuit transmits the sensing information to the application processor for fingerprint recognition after the fingerprint sensing operation, and the application processor then completes the fingerprint recognition based on the sensing information.

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

[0004] The present invention provides an electronic circuit, an electronic device and a display panel, wherein the width of a fan-out area corresponding to the electronic circuit and the size of a frame boundary close to the electronic circuit in the display panel are smaller.

[0005] Embodiments of the present invention provide an electronic circuit suitable for driving a display panel including a touch sensor and a fingerprint sensor. The electronic circuit includes a first circuit, a second circuit, a first switch circuit, and a control circuit. The first circuit is configured to generate a display drive signal for driving a data line of the display panel. The second circuit is configured to receive a fingerprint sensing signal corresponding to a fingerprint image from a fingerprint sensor. The first switch circuit includes a plurality of first terminals and a plurality of second terminals. The first terminal is coupled to the first circuit and the second circuit, and the second terminal is configurable to be coupled to a second switch circuit on the display panel. The control circuit is configured to generate a control signal for controlling the first switch circuit and the second switch circuit, so as to control 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 to control the electronic circuit to receive a fingerprint sensing signal from the fingerprint sensor of the display panel through the second switch circuit and the first switch circuit in a second time interval.

[0006] Embodiments of the present invention provide a display panel including a plurality of pixels and touch sensors, a plurality of data lines, a plurality of fingerprint sensors, a plurality of fingerprint sensing lines, and a switching circuit. The data lines are coupled to the pixels and configured to receive display drive signals. The fingerprint sensor is configured to sense a fingerprint image and generate a fingerprint sensing signal corresponding to the fingerprint image. The fingerprint sensing line is coupled to the fingerprint sensor and configured to transmit the fingerprint sensing signal. The switching circuit includes a plurality of first terminals and a plurality of second terminals. The first terminal is coupled to the data line and the fingerprint sensing line, and the second terminal can be configured to be coupled to an electronic circuit. The switching circuit is switched to receive the display drive signal from the electronic circuit in a first time interval, and the switching circuit is switched to transmit the fingerprint sensing signal to the electronic circuit in a second time interval.

[0007] An embodiment of the present invention provides an electronic device including a display panel and an electronic circuit. The display panel includes a touch sensor and a fingerprint sensor. The electronic circuit can be configured to be coupled to the display panel and is suitable for driving the display panel by displaying a drive signal and receiving a fingerprint sensing signal corresponding to a fingerprint image from the fingerprint sensor. Each of the display panel and the electronic circuit includes at least one switching circuit. The electronic circuit generates a control signal for controlling the switching circuit, so as to transmit the display drive signal to the display panel through the switching circuit in a first time interval, and receive the fingerprint sensing signal from the fingerprint sensor through the switching circuit in a second time interval.

[0008] Embodiments of the present invention provide an electronic circuit suitable for driving a display panel. The display panel includes a plurality of data lines, a plurality of fingerprint sensing lines, and a plurality of first switch units. Each of the first switch units includes a plurality of first terminals, a common second terminal, and a plurality of first control terminals. The first terminal is coupled to at least one of the data lines and at least one of the fingerprint sensing lines. The electronic circuit includes a plurality of common third terminals, a first circuit, a second circuit, and a control circuit. Each of the common third terminals can be configured to be coupled to one of the common second terminals of the first switch units of the display panel. The first circuit is configured to output a display drive signal to the data line via the common third terminal. The second circuit is configured to receive a fingerprint sensing signal corresponding to a fingerprint image from the fingerprint sensing line via the common third terminal. The control circuit is configured to be coupled to the first control terminal of each of the first switch units and generate a control signal for controlling the switching operation of the first switch unit.

[0009] An embodiment of the present invention provides an electronic circuit suitable for driving a display panel including a touch sensor and a fingerprint sensor. The electronic circuit includes a first circuit, a second circuit, a third circuit, a first switch circuit, and a control circuit. The first circuit is configured to generate a display drive signal for driving a data line of a display panel. The second circuit is configured to receive a fingerprint sensing signal corresponding to a fingerprint image from a fingerprint sensor. The third circuit is configured to determine touch information according to the touch sensing signal from the touch sensor. The first switch circuit includes a plurality of first terminals and a plurality of second terminals. The first terminal is coupled to the first circuit and the second circuit, and the second terminal can be configured to be coupled to the display panel. The control circuit is configured to generate a control signal for controlling the first switch circuit, so as to control 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 to control the electronic circuit to receive a fingerprint sensing signal from the fingerprint sensor of the display panel through the first switch circuit in a second time interval. The second circuit receives the fingerprint sensing signal through the fingerprint sensing line of the display panel selected according to the touch information.

[0010] In order that the foregoing may be better understood, several embodiments are described in detail below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

[0012] Figure 1 is a schematic block diagram illustrating an electronic device according to an embodiment of the present invention.

[0013] Figure 2 Yes Description Figure 1Schematic diagram of the display panel depicted in .

[0014] Figure 3 Yes Description Figure 1 Schematic block diagram of the electronic circuit depicted in .

[0015] Figure 4 and Figure 5 is a schematic diagram illustrating a wiring structure between an electronic circuit and a display panel according to an embodiment of the present invention.

[0016] Fig. 6A is a schematic diagram illustrating a detailed structure of a display panel according to an embodiment of the present invention.

[0017] Figure 6B It is used to control Fig. 6A Graph showing the waveform of the control signal of the switching element depicted in FIG.

[0018] Fig. 7A is a schematic diagram illustrating a detailed structure of a display panel according to another embodiment of the present invention.

[0019] Figure 7B It is used to control Fig. 7A Graph showing the waveform of the control signal of the switching element depicted in FIG.

[0020] Figure 8 is a schematic diagram illustrating a detailed structure of a display panel according to another embodiment of the present invention.

[0021] Fig. 9 is a schematic diagram illustrating a fan-out region corresponding to an electronic circuit according to an embodiment of the present invention.

[0022] Fig.10 is a schematic diagram illustrating a fan-out area corresponding to an electronic circuit in the related art.

[0023] Fig.11 is a schematic diagram illustrating a wiring structure of an electronic circuit according to an embodiment of the present invention.

[0024] Fig.12 is a schematic diagram illustrating the operation of a display panel for fingerprint sensing according to an embodiment of the present invention.

[0025] Fig.13 is a schematic diagram illustrating a wiring structure of an electronic circuit according to another embodiment of the present invention.

[0026] Fig.14A and Fig. 14B is a schematic diagram illustrating a wiring structure of an electronic circuit according to another embodiment of the present invention.

[0027] Fig.15AThe invention is a method for controlling Fig.14A and Fig. 14B Waveform diagram of the control signal of the switching element.

[0028] Fig. 15B The invention is a method for controlling the Fig.14A and Fig. 14B Waveform diagram of the control signal of the switching element.

[0029] Fig.16 FIG. 4 is a schematic diagram illustrating the detailed structure of a fingerprint sensor according to an embodiment of the present invention.

[0030] Description of Figure Numbers

[0031] 11, 110: electronic circuits;

[0032] 91, 910: fan-out area;

[0033] 100: electronic device;

[0034] 112: display driving circuit;

[0035] 114: touch sensing circuit;

[0036] 116: fingerprint sensing circuit;

[0037] 119: Wire grouping circuit;

[0038] 120: display panel;

[0039] 121: timing controller;

[0040] 122: display pixels;

[0041] 123: other controllers or processors;

[0042] 124: touch sensor;

[0043] 126: fingerprint sensor;

[0044] 130: control circuit;

[0045] 140: Transmission line;

[0046] 141: touch controller;

[0047] 161: Digital circuits;

[0048] 163: AFE circuit;

[0049] 401, 402, 403, 404: fingerprint sensing area;

[0050] 501: a first switching element;

[0051] 502: a second switch element;

[0052] 502_1: a first switch device;

[0053] 502_2: second switch device;

[0054] 503: a third switch element;

[0055] 504: a fourth switch element;

[0056] 505: fifth switch element;

[0057] BPT: bypass transistor;

[0058] DAC: signal converter;

[0059] FPI_1, FPI_2, FPI_3, FPI_4: fingerprint images;

[0060] FSL: Fingerprint sensing line;

[0061] GDL: Display scan lines;

[0062] GND, VDD: system voltage;

[0063] GSL: fingerprint scanning line;

[0064] MUX1, MUX2: switch unit;

[0065] N1D, N1F, N1T: first terminal;

[0066] N2: second terminal;

[0067] N3D, N3F: the third terminal;

[0068] N4: the fourth terminal;

[0069] PD: photodiode;

[0070] RST: reset transistor;

[0071] RSTc, SELc, SW1SD, SW1FP, SW1TP, SW2B, SW2B1, SW2B2, SW2FP, SW2FP1, SW2FP2, SW2G, SW2G1, SW2G2, SW2R, SW2R1, SW2R2, SW2W, SW3FP, SW13FP, TXc: control signal;

[0072] S1: touch sensing signal;

[0073] S2: display drive signal;

[0074] S3: fingerprint sensing signal;

[0075] S6: touch drive signal;

[0076] S7: synchronous driving signal;

[0077] SEL: row select transistor;

[0078] SDL: Display data line;

[0079] SOP: output buffer;

[0080] SW1, SW2: switch circuit;

[0081] T1: display driving stage;

[0082] T2: fingerprint sensing stage;

[0083] T3: touch sensing stage;

[0084] TSA: Touch Area;

[0085] TSL: touch sensing line;

[0086] TX: transfer transistor;

[0087] W0, W1: width. DETAILED DESCRIPTION

[0088] The following embodiments are provided to describe the present disclosure in detail, but the present disclosure is not limited to the provided embodiments, and the provided embodiments may be suitably combined. The terms "coupling / coupled" or "connecting / connected" used in this specification (including claims) of the present 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 the first signal and the second signal".

[0089] Figure 1 is a schematic block diagram illustrating an electronic device according to an embodiment of the present invention. Figure 1The 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.

[0090] 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.

[0091] Figure 2 Yes Description 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 sensor 124 may be a touch sensing electrode in the touch sensing phase, and the touch sensor 124 may be a common electrode in the display phase. In the present embodiment, as Figure 2 As shown, the touch sensor 124 of the display panel 120 may be an in-cell touch sensor. For the in-cell touch sensor, the display panel 120 does not have a touch scan line, and the touch drive signal may be directly transmitted to the touch sensor 124 via the touch sensing line TSL. For other types of touch sensors, the display panel 120 may have a touch scan line for transmitting the touch drive signal. Figure 2 In the embodiment of the present invention, the touch sensing line TSL is also 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.

[0092] In one embodiment, the display panel 120 may be an in-unit fingerprint, touch, and display panel in which a fingerprint sensor and a touch sensor are embedded, but the present invention is not limited thereto. In one embodiment, the electronic circuit 110 may drive and control the electronic device 100 to perform an in-display fingerprint recognition operation, i.e., a fingerprint identification operation. In one embodiment, the fingerprint sensor 126 may be an optical fingerprint sensor.

[0093] Figure 3 Yes Description Figure 1 A schematic block diagram of the electronic circuit depicted in FIG. Figure 2 and 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 activities of the display operation. The touch sensing circuit 114 is configured to drive and control the touch sensor 124 to sense the 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 operation. 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.

[0094] 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 is, for example, a circuit based on a microcontroller core to perform all control activities of the display operation, touch sensing operation, and fingerprint sensing operation. The control circuit 130 may include a timing controller 121, a touch controller 141, a digital circuit 161, and at least one of other controllers or processors 123 of the display driver circuit 112.

[0095] 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.

[0096] 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. In one embodiment, 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 is not repeated below.

[0097] Figure 4 and Figure 5 Schematic diagram illustrating a wiring structure between an electronic circuit and a display panel according to an embodiment of the present invention. Figures 3 to 5 , 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 the present embodiment, the switch circuit SW1 is disposed in the electronic circuit 110, and the display panel 120 does not include the switch circuit SW1. Therefore, the size of the frame boundary of the display panel 120 close to the electronic circuit 110 can be reduced.

[0098] The switch circuit SW1 includes a plurality of first terminals N1D and a first terminal N1F and a plurality of second terminals N2. The number of the first terminals N1D and the first terminal 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.

[0099] 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).

[0100] 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.

[0101] The switch circuit SW2 includes a plurality of third terminals N3D and a third terminal N3F and a plurality of fourth terminals N4. The number of 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.

[0102] 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 (the corresponding first portion of the third terminal) and the fourth terminal N4 (one of the fourth terminals). The fourth switch element 504 is coupled between the third terminal N3F (the corresponding second portion of the third terminal) and the fourth terminal N4 (one of the fourth terminals). The third terminal N3D and the first portion 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 portion 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.

[0103] 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 the corresponding switch elements of the switch circuit SW1, and generates control signals SW2R, SW2G, SW2B, and SW2FP to control the corresponding switch elements of the switch circuit SW2.

[0104] In the display driving stage, the control signal SW1SD turns on the corresponding switch element of the switch circuit SW1, and the control signals SW2R, SW2G, and SW2B turn on the corresponding switch element of 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 of the switch circuit SW1, and the control signal SW2FP turns off the corresponding switch element of the switch circuit SW2.

[0105] 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, so as 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 a multiplexed RGB signal in this case, and is delivered to the corresponding data line SDL on the display panel 120 through the switch circuit SW1 and the switch circuit SW2.

[0106] In the fingerprint sensing stage, the control signal SW1FP and the control signal SW3FP turn on the corresponding switch elements of the switch circuit SW1, and the control signal SW2FP turns on the corresponding switch element of 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.

[0107] On the other hand, the control signal SW1SD turns off the corresponding switch element of the switch circuit SW1, and the control signals SW2R, SW2G, and SW2B turn off the corresponding switch element of 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, so as 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 in 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. The display drive signal S2 and the fingerprint sensing signal S3 are transmitted on the transmission line 140 in different phases.

[0108] In the touch sensing phase (third time interval), control signals for corresponding switch elements of the control switch circuit SW1 and the switch circuit SW2 may be appropriately enabled to permit signal transmission to the data line SDL and / or the fingerprint sensing line FSL of the display panel 120 to facilitate 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 of the switch circuit SW2 in the touch sensing phase to allow signal transmission to the data line SDL and / or the fingerprint sensing line FSL. The signal may be a direct current (DC) voltage (such as a ground voltage) or other alternating current (AC) voltage capable of reducing parasitic noise in the touch sensing operation.

[0109] In one embodiment, the control signals of the corresponding switch elements of the switch circuit SW1 and the switch circuit SW2 may be deasserted to prevent the signal from being transmitted 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 of the switch circuit SW1, and / or the control signals SW2R, SW2G, SW2B, and SW2FP may disconnect the corresponding switch elements of the switch circuit SW2 during the touch sensing phase to prevent the signal from being transmitted to the data line SDL and / or the fingerprint sensing line FSL. Blocking the 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 float or couple the data line SDL and / or the fingerprint sensing line FSL of the display panel 120 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 is reduced.

[0110] Fig. 6A is a schematic diagram illustrating a detailed structure of a display panel according to an embodiment of the present invention. Figure 6B It is used to control Fig. 6A The waveform diagram of the control signal of the switching element is depicted in FIG. Fig. 6A and Figure 6B 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 of the switch unit MUX2. In the fingerprint sensing stage T2, the control signal SW2FP turns on the corresponding switch elements of the switch unit MUX2.

[0111] Fig. 7A is a schematic diagram illustrating a detailed structure of a display panel according to another embodiment of the present invention. Figure 7B It is used to control Fig. 7A The waveform diagram of the control signal of the switching element is depicted in FIG. Fig. 7A and Figure 7B, the switch unit MUX2 is a 1:8 multiplexer in this embodiment. That is, the six data lines SDL of the display pixel 122 and the two fingerprint sensing lines FSL of the fingerprint sensor 126 share one of the fourth terminals N4 in this embodiment and perform time-division multiplexing (TDM) through one of the fourth terminals N4. In the display driving stage T1, the control signals SW2R1, SW2G1, SW2B1, SW2R2, SW2G2 and SW2B2 sequentially turn on the corresponding switch elements of the switch unit MUX2. In the fingerprint sensing stage T2, the control signals SW2FP1 and SW2FP2 sequentially turn on the corresponding switch elements of the switch unit MUX2.

[0112] Figure 8 FIG. 2 is a schematic diagram illustrating a detailed structure of a display panel according to another embodiment of the present invention. Figure 8 , the display pixel 122 includes four sub-pixels in this embodiment, 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. The display drive signal S2 is a multiplexed RGBW signal in this case, and is delivered 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 phase 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 of the switch unit MUX2. In the fingerprint sensing phase T2, the control signal SW2FP turns on the corresponding switch elements of the switch unit MUX2.

[0113] Fig. 9 is a schematic diagram illustrating a fan-out region corresponding to an electronic circuit according to an embodiment of the present invention. Fig.10 Schematic diagram of a fan-out region corresponding to an electronic circuit in the related art. Figure 4 and Figure 5 In the embodiment of the present invention, the electronic circuit 110 is connected via Figure 5The same I / O node (e.g., I / O pin) depicted in the figure outputs the display drive signal S2 to the display panel 120 and receives the fingerprint sensing signal S3 from the display panel 120. The display drive signal S2 and the fingerprint sensing signal S3 are transmitted on the transmission line 140 in different stages, and 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 frame boundary of the display panel 120 close to the electronic circuit 110 can be reduced. For example, in the present embodiment, even if the electronic device 100 combines the fingerprint sensing function, the size of its frame boundary can be maintained within a specified width of, for example, 2 mm.

[0114] Fig.11 Schematic diagram illustrating a wiring structure of an electronic circuit according to an embodiment of the present invention. Figure 4 , Figure 5 as well as Fig.11 In this 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.

[0115] 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 connected to the AFE circuit 163 through the wire grouping circuit 119. The control circuit 130 generates a control signal SW1FP and a control signal SW3FP for controlling the second switch elements 502. Each second switch element 502 can be independently 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. The control circuit 130 generates a control signal SW1FP and a control signal SW3FP for controlling the second switch elements 502 according to the touch information (e.g., Fig.12 ) to determine which second switch element 502 is turned on or off. For example, the second switch device 502_2 may be controlled to transmit the fingerprint sensing signal S3 to the fingerprint sensing circuit 116 in response to the touch information (e.g., the touch area TSA) during the fingerprint sensing phase, and turn on the corresponding first switch device 502_1. The turned-on second switch element 502 establishes coupling between the fingerprint sensing line FSL and the fingerprint sensing channel for the fingerprint sensing operation.

[0116] In the present embodiment, the wire grouping circuit 119 is coupled between the switch circuit SW1 and the AFE circuit 163 for connecting 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 connected 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 1st 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 connected to each other in the same group and coupled to the first fingerprint sensing channel via the corresponding switch device 502_1 and the switch device 502_2 and the wire grouping circuit 119. Similarly, the 2nd 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 connected to each other in the same group and coupled to the second fingerprint sensing channel via the corresponding switch device 502_1 and the switch device 502_2 and the wire grouping circuit 119. The connection relationship of the remaining fingerprint sensing lines and the remaining fingerprint sensing channels can be derived similarly. In the same group, the fingerprint sensing lines FSL are connected in a wired-OR manner and are not short-circuited at the same time.

[0117] In this embodiment, 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.

[0118] The control circuit 130 generates a control signal SW1FP, a control signal SW1SD, and a control signal SW3FP for controlling the switch circuit SW1, so as 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 signals SW1FP and SW3FP turn on the corresponding switch elements of the switch circuit SW1, and the control signal SW1SD turns off the corresponding switch elements of the switch circuit SW1. In this embodiment, the first switch device 502_1 and the second switch device 502_2 are controlled by different control signals SW1FP and SW3FP, respectively. The control signal SW1FP is enabled in the fingerprint sensing stage, and the control signal SW3FP is enabled according to the touch information in the fingerprint sensing stage. That is, the transmission path between the first terminal N1F and the second terminal N2 is turned on in the switch circuit SW1 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.

[0119] Fig.12 is a schematic diagram illustrating the operation of a display panel for fingerprint sensing according to an embodiment of the present invention. Figure 4 , Figure 5 , Fig.11 as well as Fig.12 , the electronic circuit 110 can drive and control the display panel 120 to sense one or more fingerprint images FPI_1, fingerprint image FPI_2, fingerprint image FPI_3 and fingerprint image FPI_4 presented on the display panel 120. In this embodiment, the fingerprint sensing lines FSL extend in direction Y (e.g., vertical direction) and are arranged in parallel in direction X (e.g., horizontal direction), such as Figure 2 As shown. The display panel 120 is not pre-divided into fixed areas for fingerprint sensing in at least 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 of ​​the display panel 120 are not predetermined. Fingerprint sensing areas 401, 402, 403, and 404 can be flexibly formed for fingerprint sensing by selecting a portion of the fingerprint sensing lines FSL among the plurality of fingerprint sensing lines FSL arranged above the display panel 120. The edges or boundaries of the fingerprint sensing areas 401, 402, 403, and 404 may correspond to any of the fingerprint sensing lines FSL. Since the size and shape of the fingerprint sensing area are not pre-determined in the X direction, there is no need to perform cross-over sensing to process signals from different areas during the sensing process. Cross-over sensing generally requires more fingerprint sensing time and may cause sensing delays.

[0120] Specifically, the control circuit 130 is based on Figure 2 The 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 of 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 depend on the 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 of ​​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 enables the control signal SW3FP according to the touch information and controls a part of the second switch device 502_2 to be turned on by using the enabled 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.11 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 effective control signal SW3FP, and the second switch device 502_2 corresponding to the unselected fingerprint sensing line FSL is turned off according to the ineffective 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 by selecting the fingerprint sensing line FSL of the display panel 120 according to the touch information.

[0121] By controlling the conduction state of the second switch device 502_2, the fingerprint sensing line FSL corresponding to the touch area TSA is selected from the plurality of fingerprint sensing lines FSL of the display panel 120. Therefore, in the present embodiment, a part of the fingerprint sensing lines FSL can be flexibly selected to form the fingerprint sensing area 401, the fingerprint sensing area 402, the fingerprint sensing area 403 or the 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), and there is no need to perform 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 time used for fingerprint sensing.

[0122] Fig.13 Schematic diagram illustrating a wiring structure of an electronic circuit according to another embodiment of the present invention. Fig.11 and Fig.13 , the electronic circuit 110 of this embodiment is similar to Fig.11 The electronic circuit 110 of the embodiment is shown in FIG. 1 , and the main difference therebetween is that the second switch element 502 of the embodiment is controlled by the control signal SW13FP. In the embodiment, according to the design requirements, Fig.11 The second switch device 502_2 can be Fig.13 is omitted or considered to be combined with the first switch device 502_1 to form Fig.13 The second switching element 502 is depicted in FIG.

[0123] Specifically, in the fingerprint sensing stage, the control circuit 130 validates the control signal SW13FP according to the touch information. By using the validated control signal SW13FP, the control circuit 130 controls a portion of the second switch elements 502 to be turned on. According to the touch area TSA, the portion of the second switch element 502 that is turned on can select 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 is turned on. Fig.13 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.

[0124] 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.

[0125] In addition, the operation of the electronic circuit 110 of this embodiment can be Fig.11 and Fig.12 Sufficient teaching, suggestions and implementation instructions are obtained in the embodiments of the present invention, and therefore no further description is provided herein.

[0126] Fig.14A and Fig. 14B Schematic diagram illustrating a wiring structure of an electronic circuit according to another embodiment of the present invention. Fig.11 , Fig.14A as well as Fig. 14B , the electronic circuit 110 of this embodiment is similar to Fig.11 , and the main difference therebetween is that each of the switch units MUX1 further includes a fifth switch element 505 corresponding to the touch sensing circuit 114. The fifth switch element 505 is controlled by a control signal SW1TP.

[0127] 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 The depicted touch sensing line TSL drives 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.

[0128] Fig.15A The invention is a method for controlling Fig.14A and Fig. 14B. 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 of 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 the touch sensing operation is performed, 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, the parasitic capacitance affecting the touch sensing signal (S1) is 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 to allow the data line SDL and / or the fingerprint sensing line FSL to be coupled to the DC voltage from the DC voltage source. For example, a DC voltage may be provided by 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.

[0129] In the display driving phase T1 and the fingerprint sensing phase T2, the control signal for controlling the operation of the electronic device 100 may be Figures 4 to 8 Sufficient teaching, suggestions and implementation instructions are obtained in the embodiments of the present invention, and therefore no further description is provided herein.

[0130] Fig. 15B The invention is a method for controlling the Fig.14A and Fig. 14B The waveform diagram of the control signal of the switching element. Fig.14A , Fig. 14B as well as Fig. 15B 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, and thus the data line SDL and / or the fingerprint sensing line FSL are in a floating state, i.e., a high impedance (Hi-Z) state. In addition to the above-mentioned methods, there are other methods for controlling the switch circuits SW1 and 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 float the data line SDL and / or the fingerprint sensing line FSL of the display panel 120 in the touch sensing phase T3. Since the data line SDL and / or the fingerprint sensing line FSL of the display panel 120 are floating, the flow of charges is blocked, thereby reducing the parasitic capacitance affecting the touch sensing signal.

[0131] In addition, the operation of the electronic circuit 110 of this embodiment can be Figures 11 to 15A Sufficient teaching, suggestions and implementation instructions are obtained in the literature, and therefore no further description is provided herein.

[0132] Fig.16 Schematic diagram illustrating the detailed structure of a fingerprint sensor according to an embodiment of the present invention. Fig.16, 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 to 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.

[0133] In one embodiment, an electronic circuit (110) is provided for driving a display panel (120) including a touch sensor (124) and a fingerprint sensor (126). The electronic circuit (110) includes a first circuit (112), a second circuit (116), a first switch circuit (SW1), and a control circuit (130). The first circuit (112) is configured to generate a display drive signal (S2) for driving a data line (SDL) of the display panel (120). The second circuit (116) is configured to receive a fingerprint sensing signal (S3) corresponding to a fingerprint image (FPI_1, FPI_2, FPI_3, and / or FPI_4) from the fingerprint sensor (126). The first switch circuit (SW1) includes a plurality of first terminals (N1D and N1F) and a plurality of second terminals (N2). The first terminals (N1D and N1F) are coupled to the first circuit (112) and the second circuit (116), and the second terminal (N2) can be configured to be coupled to a second switch circuit (SW2) on the display panel (120). The control circuit (130) is configured to generate control signals (SW1SD, SW1FP, SW3FP, SW2R, SW2G, SW2B and / or SW2FP) for controlling the first switch circuit (SW1) and the second switch circuit (SW2), so as to control the electronic circuit (110) to transmit the display drive signal (S2) from the first circuit (112) to the data line (SDL) through the first switch circuit (SW1) and the second switch circuit (SW2) in a first time interval (T1), and to control the electronic circuit (110) to receive the fingerprint sensing signal (S3) from the fingerprint sensor (126) of the display panel (120) through the second switch circuit (SW2) and the first switch circuit (SW1) in a second time interval (T2).

[0134] In one embodiment, a display panel (120) is provided that includes a plurality of pixels (122) and a touch sensor (124), a plurality of data lines (SDL), a plurality of fingerprint sensors (126), a plurality of fingerprint sensing lines (FSL), and a switch circuit (SW2). The data line (SDL) is coupled to the pixel (122) and configured to receive a display drive signal (S2). The fingerprint sensor (126) is configured to sense a fingerprint image (FPI_1, FPI_2, FPI_3, and / or FPI_4) and generate a fingerprint sensing signal (S3) corresponding to the fingerprint image (FPI_1, FPI_2, FPI_3, and / or FPI_4). The fingerprint sensing line (FSL) is coupled to the fingerprint sensor (126) and configured to transmit the fingerprint sensing signal (S3). The switch circuit (SW2) includes a plurality of first terminals (N3D, N3F) and a plurality of second terminals (N4). The first terminal (N3D, N3F) is coupled to a data line (SDL) and a fingerprint sensing line (FSL), and the second terminal (N4) is configurable to be coupled to an electronic circuit (110). The switch circuit (SW2) is switched to receive a display driving signal (S2) from the electronic circuit (110) in a first time interval (T1), and the switch circuit (SW2) is switched to transmit a fingerprint sensing signal (S3) to the electronic circuit (110) in a second time interval (T2).

[0135] In one embodiment, an electronic device (100) is provided that includes a display panel (120) and an electronic circuit (110). The display panel (110) includes a touch sensor (124) and a fingerprint sensor (126). The electronic circuit (110) can be configured to be coupled to the display panel (120) and is suitable for driving the display panel (120) through a display drive signal (S2) and receiving a fingerprint sensing signal (S3) corresponding to a fingerprint image (FPI_1, FPI_2, FPI_3 and / or FPI_4) from the fingerprint sensor (126). Each of the display panel (120) and the electronic circuit (110) includes at least one switch circuit (SW2 or SW1). The electronic circuit (110) generates a control signal (SW1SD, SW1FP, SW3FP, SW2R, SW2G, SW2B and / or SW2FP) for controlling the switch circuit (SW1, SW2) so as to transmit a display driving signal (S2) to the display panel (120) through the switch circuit (SW1, SW2) in a first time interval (T1), and receive a fingerprint sensing signal (S3) from the fingerprint sensor (126) through the switch circuit (SW1, SW2) in a second time interval (T2).

[0136] In one embodiment, an electronic circuit (110) is provided for driving a display panel (120). The display panel (120) includes a plurality of data lines (SDL), a plurality of fingerprint sensing lines (FSL), and a plurality of first switch units (MUX2). Each of the first switch units (MUX2) includes a plurality of first terminals (N3D, N3F), a common second terminal (N4), and a plurality of first control terminals (terminals for receiving control signals). The first terminals (N3D, N3F) are coupled to at least one of the data lines (SDL) and at least one of the fingerprint sensing lines (FSL). The electronic circuit (110) includes a plurality of common third terminals (N2), a first circuit (112), a second circuit (116), and a control circuit (130). Each of the common third terminals (N2) can be configured to be coupled to one of the common second terminals (N4) of the first switch units (MUX2) of the display panel (120). The first circuit (112) is configured to output a display driving signal (S2) to the data line (SDL) via the common third terminal (N2). The second circuit (116) is configured to receive a fingerprint sensing signal (S3) corresponding to the fingerprint image (FPI_1, FPI_2, FPI_3 and / or FPI_4) from the fingerprint sensing line (FSL) via the common third terminal (N2). The control circuit (130) is configured to be coupled to a first control terminal (a terminal receiving a control signal) of each of the first switch units (MUX2) and generate a control signal (SW2R, SW2G, SW2B and / or SW2FP) for controlling the switching operation of the first switch unit (MUX2).

[0137] In one embodiment, an electronic circuit (110) is provided for driving a display panel (120) including a touch sensor (124) and a fingerprint sensor (126). The electronic circuit (110) includes a first circuit (112), a second circuit (116), a third circuit (114), a first switch circuit (SW1), and a control circuit (130). The first circuit (112) is configured to generate a display drive signal (S2) for driving a data line (SDL) of the display panel (120). The second circuit (116) is configured to receive a fingerprint sensing signal (S3) corresponding to a fingerprint image (FPI_1, FPI_2, FPI_3, and / or FPI_4) from the fingerprint sensor (126). The third circuit (114) is configured to determine touch information (TSA) based on the touch sensing signal (S1) from the touch sensor (124). The first switch circuit (SW1) includes a plurality of first terminals (N1D, N1F) and a plurality of second terminals (N2). The first terminal (N1D, N1F) is coupled to the first circuit (112) and the second circuit (116), and the second terminal (N2) can be configured to be coupled to the display panel (120). The control circuit (130) is configured to generate a control signal (SW1SD, SW1FP and / or SW3FP) for controlling the first switch circuit (SW1) to control the electronic circuit (110) to transmit the display drive signal (S2) from the first circuit (112) to the data line (SDL) through the first switch circuit (SW1) in a first time interval (T1), and to control the electronic circuit (110) to receive a fingerprint sensing signal (S3) from a fingerprint sensor (126) of the display panel (120) through the first switch circuit (SW1) in a second time interval (T2). The second circuit (116) receives the fingerprint sensing signal (S3) through a fingerprint sensing line (FSL) of the display panel (120) selected according to the touch information (TSA).

[0138] In summary, in an embodiment of the present invention, a display drive signal and a fingerprint sensing signal are transmitted on the same transmission line in different stages. 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 and receives the fingerprint sensing signal from the display panel via the same pin connected to the transmission line. 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 frame boundary near the electronic circuit in the display panel can also be small. In addition, the touch area is determined to form a fingerprint sensing area for a fingerprint image. The control circuit selects a portion of the fingerprint sensing line for 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, and the time for fingerprint sensing can be reduced. Therefore, the method for fingerprint sensing and identification is more efficient, so that the user has a good user experience.

[0139] Those skilled in the art will appreciate that various modifications and variations of the disclosed embodiments may be made without departing from the scope or spirit of the present disclosure. In view of the foregoing, it is intended that the present disclosure encompass modifications and variations of the present disclosure that fall 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 include: A first circuit configured to generate a display driving signal for driving a data line of the display panel, wherein the display driving signal is transmitted to the display panel via the data line and is used to drive the display panel to display an image; a second circuit configured to receive a fingerprint sensing signal corresponding to a fingerprint image from the fingerprint sensor; 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 a second switch circuit on the display panel; as well as a control circuit configured to generate a control signal for controlling the first switch circuit and the second switch circuit for 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 sensor of the display panel through the second switching circuit and the first switching circuit in a second time interval. 2 . The electronic circuit according to claim 1 , wherein the first time interval corresponds to a display driving phase, and the second time interval corresponds to a fingerprint sensing phase. 3 . The electronic circuit according to claim 1 , wherein the number of the first terminals is greater than the number of the second terminals.

4. The electronic circuit according to claim 1, wherein the first switch circuit comprises a plurality of switch units, and each of the switch units of the first switch circuit include: a first switching 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; as well as 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.

5. The electronic circuit according to claim 4, wherein the second switching element include: a first switch device coupled to the corresponding one of the second terminals and the second circuit and controlled to transmit the fingerprint sensing signal to the second circuit in the second time interval; as well as a second switch device coupled between the first switch device and the second circuit and controlled to transmit the fingerprint sensing signal to the second circuit in response to a determination of touch information, The first switch device and the second switch device are controlled by different control signals.

6. The electronic circuit according to claim 4, further comprising: include: 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 connected to the second circuit through the wire grouping circuit.

7. The electronic circuit according to claim 1, wherein the second switch circuit comprises a plurality of third terminals and a plurality of fourth terminals, the third terminals being coupled to the data lines and the fingerprint sensing lines of the display panel, and the fourth terminals being configurable to be coupled to the second terminals of the first switch circuit.

8. The electronic circuit according to claim 7, wherein the second switch circuit comprises a plurality of switch units, and each of the switch units of the second switch circuit include: a plurality of third switching elements coupled between respective first portions of the third terminal and one of the fourth terminals, the third switching elements being switched to receive the display drive signal from the electronic circuit in the first time interval; as well as One or more fourth switch elements are coupled between the corresponding second portion of the third terminal and the one of the fourth terminals, and the fourth switch elements are switched to transmit the fingerprint sensing signal to the electronic circuit in the second time interval.

9. The electronic circuit according to claim 8, wherein The first portion of the third terminal is coupled to the data line of the display panel, and the second portion of the third terminal is coupled to the fingerprint sensing line.

10. The electronic circuit according to claim 1, further comprising: include: 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 terminal of the first switch circuit is further coupled to the third circuit.

11. The electronic circuit according to claim 10, wherein the control circuit generates the control signal for controlling the first switch circuit and the second 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 and the second switching circuit in a third time interval corresponding to a touch sensing phase. 12 . The electronic circuit according to claim 11 , wherein the synchronization driving signal has the same waveform as the touch driving signal. 13 . 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.

14. The electronic circuit according to claim 13, wherein the first switch circuit comprises a plurality of second switch elements configured to transmit the fingerprint sensing signal to the second circuit, and a portion of the second switch elements are turned on to transmit the fingerprint sensing signal to the second circuit according to the touch information.

15. The electronic circuit according to claim 10, wherein The control circuit generates the control signal for controlling the first switch circuit and the second switch circuit, so as to The data line and / or the fingerprint sensing line of the display panel is floated or coupled to a direct current voltage in a third time interval corresponding to a touch sensing phase.

16. The electronic circuit of claim 1, wherein the second circuit is further configured to process the fingerprint sensing signal to obtain the fingerprint image.

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

18. A display panel, include: Multiple pixels and touch sensors; a plurality of data lines coupled to the pixels and configured to receive display driving signals, wherein the display driving signals are transmitted to the display panel via the data lines and used to drive the display panel to display an image; a plurality of fingerprint sensors configured to sense fingerprint images and generate fingerprint sensing signals corresponding to the fingerprint images; a plurality of fingerprint sensing lines coupled to the fingerprint sensor and configured to transmit the fingerprint sensing signal; as well as A switch circuit includes a plurality of first terminals and a plurality of second terminals, wherein the first terminals are coupled to the data lines and the fingerprint sensing lines, and the second terminals can be configured to be coupled to an electronic circuit, wherein the switch circuit is switched to receive the display drive 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.

19. The display panel according to claim 18, wherein the switch circuit comprises a plurality of switch units, and each of the switch units include: a plurality of first switching elements coupled between respective first portions of the first terminals and one of the second terminals, the first switching elements being switched to receive the display drive signal from the electronic circuit in the first time interval; as well as One or more second switching elements are coupled between the corresponding second portion of the first terminal and the one of the second terminals, and the second switching elements are switched to transmit the fingerprint sensing signal to the electronic circuit in the second time interval.

20. The display panel according to claim 19, wherein The first portion of the first terminal is coupled to the data line of the display panel, and the second portion of the first terminal is coupled to the fingerprint sensing line.

21. The display panel according to claim 19, wherein the number of the first switching elements is greater than the number of the second switching elements. 22 . The display panel according to claim 18 , wherein the first time interval corresponds to a display driving phase, and the second time interval corresponds to a fingerprint sensing phase.

23. The display panel according to claim 18, wherein the switch circuit is switched to float or couple the data line and / or the fingerprint sensing line to a DC voltage in a third time interval corresponding to a touch sensing phase.

24. The display panel according to claim 18, 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. 25 . The display panel according to claim 24 , wherein the synchronization driving signal has the same waveform as the touch driving signal. 26 . The display panel of claim 18 , wherein the fingerprint sensing line is selected to transmit the fingerprint sensing signal to the electronic circuit according to touch information determined by the electronic circuit.

27. An electronic device, include: display panel, including touch sensor and fingerprint sensor; as well as an electronic circuit, which may be configured to be coupled to the display panel and is suitable for driving the display panel through a display driving signal and receiving a fingerprint sensing signal corresponding to a fingerprint image from the fingerprint sensor, wherein the display driving signal is transmitted to the display panel via a data line and is used to drive the display panel to display an image, Each of the display panel and the electronic circuit includes at least one switching circuit, and the electronic circuit generates a control signal for controlling the switching circuit, so as to transmit the display driving signal to the display panel through the switching circuit in a first time interval, and receive the fingerprint sensing signal from the fingerprint sensor through the switching circuit in a second time interval. 28 . The electronic device of claim 27 , wherein the first time interval corresponds to a display driving phase, and the second time interval corresponds to a fingerprint sensing phase.

29. The electronic device according to claim 27, wherein the electronic circuit include: a first circuit configured to generate the display driving signal for driving the data line of the display panel through the switch circuit on the display panel; a second circuit configured to receive the fingerprint sensing signal corresponding to the fingerprint image from the fingerprint sensor through the switch circuit on the display panel; a first switch circuit, comprising a plurality of first terminals and a plurality of second terminals, the first terminals being coupled to the first circuit and the second circuit, the second terminals being configurable to be coupled to the switch circuit on the display panel, wherein the first switch circuit is the switch circuit included in the electronic circuit; as well as A control circuit configured to generate the control signal for controlling the first switch circuit and the switch circuit on the display panel, so as 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 switch circuit on the display panel in the first time interval, and The electronic circuit is controlled to receive the fingerprint sensing signal from the fingerprint sensor of the display panel through the switch circuit and the first switch circuit on the display panel in the second time interval.

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

31. The electronic device according to claim 29, wherein the first switch circuit comprises a plurality of switch units, each of the switch units of the first switch circuit include: a first switching 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; as well as 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.

32. The electronic device according to claim 31, wherein the second switch element include: a first switch device coupled to the corresponding one of the second terminals and the second circuit and controlled to transmit the fingerprint sensing signal to the second circuit in the second time interval; as well as a second switch device coupled between the first switch device and the second circuit and controlled to transmit the fingerprint sensing signal to the second circuit in response to a determination of touch information, The first switch device and the second switch device are controlled by different control signals.

33. The electronic device according to claim 31, wherein the electronic circuit is further include: 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 connected to the second circuit through the wire grouping circuit.

34. The electronic device according to claim 29, wherein the electronic circuit is further include: 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 terminal of the first switch circuit is further coupled to the third circuit.

35. The electronic device according to claim 34, wherein the control circuit generates the control signal for controlling the first switch circuit and the switch circuit on the display panel, so as 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 and the switching circuit on the display panel in a third time interval corresponding to a touch sensing phase. The electronic device according to claim 35 , wherein the synchronization driving signal has the same waveform as the touch driving signal.

37. The electronic device according to claim 34, 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 of claim 34, wherein The control circuit generates the control signal for controlling the first switch circuit and the switch circuit on the display panel, so as to The data line and / or the fingerprint sensing line of the display panel is floated or coupled to a direct current voltage in a third time interval corresponding to a touch sensing phase.

40. The electronic device of claim 29, wherein the second circuit is further configured to process the fingerprint sensing signal to obtain the fingerprint image.

41. The electronic device according to claim 27, wherein the display panel is include: Multiple pixels; a plurality of data lines coupled to the pixels and configured to receive the display driving signals; a plurality of fingerprint sensing lines coupled to the fingerprint sensor and configured to transmit the fingerprint sensing signal; as well as A second switching circuit includes a plurality of third terminals and a plurality of fourth terminals, wherein the third terminals are coupled to the data lines and the fingerprint sensing lines, and the fourth terminals can be configured to be coupled to the electronic circuit, wherein the second switching circuit is the switching circuit included in the display panel.

42. The electronic device according to claim 41, wherein the second switch circuit comprises a plurality of switch units, each of the switch units of the second switch circuit include: a plurality of third switching elements coupled between respective first portions of the third terminal and one of the fourth terminals, the third switching elements being switched to receive the display drive signal from the electronic circuit in the first time interval; as well as One or more fourth switch elements are coupled between the corresponding second portion of the third terminal and the one of the fourth terminals, and the fourth switch elements are switched to transmit the fingerprint sensing signal to the electronic circuit in the second time interval.

43. The electronic device according to claim 42, wherein The first portion of the third terminal is coupled to the data line of the display panel, and the second portion of the third terminal is coupled to the fingerprint sensing line.

44. The electronic device according to claim 42, wherein the number of the third switching elements is greater than the number of the fourth switching elements.

45. The electronic device of claim 27, wherein the electronic circuit is implemented in a single semiconductor chip.

46. ​​An electronic circuit, adapted to drive a display panel, wherein the display panel comprises a plurality of data lines, a plurality of fingerprint sensing lines, and a plurality of first switch units, and each of the first switch units comprises a plurality of first terminals, a common second terminal, and a plurality of first control terminals, the first terminal being coupled to at least one of the data lines and at least one of the fingerprint sensing lines, the electronic circuit include: a plurality of common third terminals, each of which is configurable to be coupled to one of the common second terminals of the first switch unit of the display panel; a first circuit configured to output a display driving signal to the data line via the common third terminal, wherein the display driving signal is transmitted to the display panel via the data line and is used to drive the display panel to display an image; a second circuit configured to receive a fingerprint sensing signal corresponding to a fingerprint image from the fingerprint sensing line via the common third terminal; as well as A control circuit is configured to be coupled to the first control terminal of each of the first switch units and to generate a control signal for controlling a switching operation of the first switch units.

47. The electronic circuit according to claim 46, further comprising a plurality of second switch units, wherein each of the second switch units comprises one of the common third terminals, a plurality of fourth terminals coupled to the first circuit and the second circuit, and a plurality of second control terminals, and The control circuit is coupled to the second control terminal of each of the second switch units and is configured to generate the control signal for controlling a switching operation of the second switch units.

48. The electronic circuit according to claim 47, wherein the control circuit controls the switching operations of the first switch unit and the second switch unit to controlling the electronic circuit to output the display drive signal to the data line in a first time interval, and The electronic circuit is controlled to receive the fingerprint sensing signal from the fingerprint sensing line in a second time interval.

49. The electronic circuit of claim 48, wherein the first time interval corresponds to a display driving phase and the second time interval corresponds to a fingerprint sensing phase.

50. The electronic circuit according to claim 48, wherein each of the second switch units include: a first switching element coupled between the first circuit and a corresponding one of the common third terminals and controlled to transmit the display drive signal from the first circuit in the first time interval; as well as A second switch element is coupled between the second circuit and the corresponding one of the common third terminals and is controlled to transmit the fingerprint sensing signal to the second circuit in the second time interval.

51. The electronic circuit of claim 50, wherein the second switching element include: a first switch device coupled to the corresponding one of the common third terminals and the second circuit and controlled to transmit the fingerprint sensing signal to the second circuit in the second time interval; as well as a second switch device coupled between the first switch device and the second circuit and controlled to transmit the fingerprint sensing signal to the second circuit in response to a determination of touch information, The first switch device and the second switch device are controlled by different control signals.

52. The electronic circuit according to claim 50, further comprising: include: A wire grouping circuit is coupled between the second circuit and the second switch unit, wherein the second switch elements of the second switch unit are divided into a plurality of groups and connected to the second circuit through the wire grouping circuit.

53. The electronic circuit according to claim 47, further comprising: include: A third circuit is configured to output a touch driving signal for driving a touch sensor of the display panel and receive a touch sensing signal from the touch sensor, wherein the fourth terminal of the second switch unit is further coupled to the third circuit.

54. The electronic circuit according to claim 53, wherein the control circuit controls the switching operations of the first switch unit and the second switch unit 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 unit and the second switching unit in a third time interval corresponding to a touch sensing phase.

55. The electronic circuit of claim 54, wherein the synchronization drive signal has the same waveform as the touch drive signal.

56. The electronic circuit according to claim 53, wherein the third circuit determines touch information according to the touch sensing signal, and the second circuit receives the fingerprint sensing signal through the fingerprint sensing line of the display panel selected according to the touch information.

57. An electronic circuit according to claim 56, wherein the second switching unit includes a plurality of second switching elements configured to transmit the fingerprint sensing signal to the second circuit, and a portion of the second switching elements are turned on to transmit the fingerprint sensing signal to the second circuit according to the touch information.

58. The electronic circuit of claim 53, wherein The control circuit controls the switching operations of the first switch unit and the second switch unit to The data line and / or the fingerprint sensing line of the display panel are floated or coupled to a direct current voltage in a third time interval corresponding to a touch sensing phase.

59. The electronic circuit of claim 46, wherein the second circuit is further configured to process the fingerprint sensing signal to obtain the fingerprint image.

60. The electronic circuit of claim 46, wherein the electronic circuit is implemented in a single semiconductor chip.

61. An electronic circuit, suitable for driving a display panel including a touch sensor and a fingerprint sensor, the electronic circuit include: A first circuit configured to generate a display driving signal for driving a data line of the display panel, wherein the display driving signal is transmitted to the display panel via the data line and is used to drive the display panel to display an image; a second circuit configured to receive a fingerprint sensing signal corresponding to a fingerprint image from the fingerprint sensor; a third circuit configured to determine touch information according to a touch sensing signal from the touch sensor; a first switch circuit comprising a plurality of first terminals and a plurality of second terminals, the first terminals being coupled to the first circuit and the second circuit, and the second terminals being configurable to be coupled to the display panel; as well as A control circuit configured to generate a control signal for controlling the first switch circuit, so as 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, wherein the second circuit receives the fingerprint sensing signal through a fingerprint sensing line of the display panel selected according to the touch information.

62. The electronic circuit of claim 61, wherein the first time interval corresponds to a display driving phase and the second time interval corresponds to a fingerprint sensing phase.

63. The electronic circuit of claim 61, wherein the number of the first terminals is greater than the number of the second terminals.

64. The electronic circuit according to claim 61, wherein the first switch circuit comprises a plurality of switch units, each of the switch units of the first switch circuit include: a first switching 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; as well as 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.

65. The electronic circuit of claim 64, wherein the second switching element include: a first switch device coupled to the corresponding one of the second terminals and the second circuit and controlled to transmit the fingerprint sensing signal to the second circuit in the second time interval; as well as a second switch device coupled between the first switch device and the second circuit and controlled to transmit the fingerprint sensing signal to the second circuit according to the touch information, The first switch device and the second switch device are controlled by different control signals.

66. The electronic circuit according to claim 64, further comprising: include: 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 connected to the second circuit through the wire grouping circuit.

67. An electronic circuit according to claim 61, 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 terminal of the first switching circuit is further coupled to the third circuit.

68. The electronic circuit according to claim 67, 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.

69. The electronic circuit of claim 68, wherein the synchronization drive signal has the same waveform as the touch drive signal.

70. 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 according to the touch information.

71. The electronic circuit of claim 67, wherein The control circuit generates the control signal for controlling the first switch circuit so as to float the data line and / or the fingerprint sensing line of the display panel or couple to a DC voltage in a third time interval corresponding to a touch sensing phase.

72. The electronic circuit of claim 61, wherein the second circuit is further configured to process the fingerprint sensing signal to obtain the fingerprint image.

73. The electronic circuit of claim 61 , 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 terminal 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; and 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.

74. An electronic circuit according to claim 73, wherein The control circuit generates the control signal for further controlling the second switching circuit, so as to control the electronic circuit and the second switching circuit to float or couple the data line and / or the fingerprint sensing line of the display panel to a DC voltage in a third time interval corresponding to a touch sensing phase.

75. The electronic circuit of claim 61, wherein the electronic circuit is implemented in a single semiconductor chip.

76. An electronic circuit according to claim 73, wherein the second switching circuit comprises a plurality of third terminals and a plurality of fourth terminals, the third terminals being coupled to the data lines and the fingerprint sensing lines of the display panel, and the fourth terminals being configurable to be coupled to the second terminals of the first switching circuit.

77. The electronic circuit according to claim 76, wherein the second switch circuit comprises a plurality of switch units, and each of the switch units of the second switch circuit include: a plurality of third switching elements coupled between respective first portions of the third terminal and one of the fourth terminals, the third switching elements being switched to receive the display drive signal from the electronic circuit in the first time interval; as well as One or more fourth switch elements are coupled between the corresponding second portion of the third terminal and the one of the fourth terminals, and the fourth switch elements are switched to transmit the fingerprint sensing signal to the electronic circuit in the second time interval.

78. The electronic circuit of claim 77, wherein the first portion of the third terminal is coupled to the data line of the display panel, and the second portion of the third terminal is coupled to the fingerprint sensing line.

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