TWI791194B - Electronic circuit having display driving function, touch sensing function and fingerprint sensing function - Google Patents

Abstract

An electronic circuit adapted to drive a display panel including touch sensors and fingerprint sensors is provided. The electronic circuit includes a switch circuit and a control circuit. The switch circuit includes a plurality of first switch elements and a plurality of second switch elements. The control circuit is configured to generate control signals for controlling the switch circuit, so as to control the electronic circuit to transmit the display driving signals from the first circuit to the data lines through a first part of the first switch elements in a first time interval, and control the electronic circuit to receive the fingerprint sensing signals from the fingerprint sensors of the display panel through the second switch elements in a second time interval.

Description

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

The present invention relates to an electronic circuit, an electronic device and a display panel, and in particular to an electronic circuit suitable for driving a display panel including a touch sensor and a fingerprint sensor, and an electronic circuit and a display panel. Panel electronics.

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 can overlap with the display area of the electronic device. For example, the under-display fingerprint identification technique is to embed a fingerprint sensor into a display panel, and the fingerprint sensor can sense or obtain a fingerprint image through the display panel. When a touch event such as fingerprint identification occurs, the touch sensing circuit can report it to the application processor of the electronic device through a designated interface. Subsequently, the application processor further controls the display driving circuit to drive the display panel to display an image for fingerprint sensing. On the other hand, the application processor further controls the fingerprint sensing circuit to perform fingerprint sensing operation. The fingerprint sensing circuit transmits sensing information to the application processor for fingerprint identification after the fingerprint sensing operation, and then the application processor performs fingerprint identification according to the sensing information.

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

On the other hand, the display panel can be equipped with a plurality of multiplexers to receive display data from the electronic circuit. For example, if the display panel includes red, green and blue pixels, then the multiplexer is designed as a 1:3 multiplexer for receiving red, green and blue display data from the electronic circuit. However, for some applications the display panel may contain red, green, blue and white pixels, and thus the multiplexer is designed as a 1:4 multiplexer for receiving red, green, blue and white display material. In this case, the resolution of the fingerprint image may be reduced.

The present invention provides an electronic circuit, an electronic device, and a display panel in which the width of a fan-out area corresponding to the electronic circuit and the size of a frame border close to the electronic circuit in the display panel are small. In addition, the resolution of the fingerprint image can also be maintained.

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 display driving signals for driving data lines of the display panel. The second circuit is configured to receive a fingerprint sensing signal corresponding to a fingerprint image from the fingerprint sensor. The first switching circuit includes a plurality of first switching elements and a plurality of second switching elements. The first switching element is coupled to the first circuit, and the second switching element is coupled to the second circuit. The control circuit is configured to generate a control signal for controlling the first switching circuit to control the electronic circuit to transmit the display driving signal from the first circuit to the data line through the first part of the first switching element in the first time interval, and the control electronic circuit The circuit receives a fingerprint sensing signal from the fingerprint sensor of the display panel through the second switching element during the second time interval.

An embodiment of the invention provides a display panel, which includes 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 switch circuit. 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 a fingerprint sensing signal. The switch circuit includes a plurality of first switch units and a plurality of second switch units. The first switch unit is coupled to the data line and the first portion of the fingerprint sensing line, and the second switch unit is coupled to the second portion of the fingerprint sensing line. The first switch unit is switched to receive a display driving signal from the electronic circuit in a first time interval, and the first switch unit and the second switch unit are switched to transmit a fingerprint sensing signal to the electronic circuit in a second time interval.

An embodiment of the invention provides an electronic device including a display panel and an electronic circuit. The display panel contains a touch sensor and a fingerprint sensor. The electronic circuit may be configured to be coupled to the display panel and adapted to drive the display panel with a display drive signal and receive a fingerprint sensing signal corresponding to a fingerprint image from the fingerprint sensor. The electronic circuit includes a first switching circuit. The first switching circuit includes a plurality of first switching elements and a plurality of second switching elements. The electronic circuit generates a control signal for controlling the first switching circuit to transmit the display driving signal to the display panel through the first part of the first switching element in the first time interval and through the second switching element in the second time interval A fingerprint sensing signal is received from the fingerprint sensor.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail together with the accompanying drawings.

Examples are provided below to describe the present invention in detail, but the present invention is not limited to the provided examples, and the provided examples can be appropriately combined. The terms "coupling/coupled" or "connecting/connected" used in the description of this application (including the scope of claims) may refer to any direct or indirect connection. For example, "the first device is coupled to the second device" should be interpreted as "the first device is directly connected to the second device" or "the first device is indirectly connected to the second device through other devices or connection members". The term "signal" may refer to current, voltage, charge, temperature, data, electromagnetic wave, or any one or more signals. Additionally, the term "and/or" may mean "at least one of". For example, "the first signal and/or the second signal" should be interpreted as "at least one of the first signal and the second signal".

FIG. 1 is a schematic block diagram illustrating an electronic device according to an embodiment of the present invention. Referring to FIG. 1 , the electronic device 100 of this embodiment includes an electronic circuit 110 and a display panel 120 . The display panel 120 includes a touch sensor and a fingerprint sensor. The electronic circuit 110 may be configured to be coupled to a display panel 120 . The electronic circuit 110 is adapted to drive the display panel 120 .

In this embodiment, the electronic device 100 may be an electronic device having a display function, a touch sensing function, and a fingerprint sensing function. In one embodiment, the electronic device 100 may be, but 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 an independently operated display function, a touch sensing function, and a fingerprint sensor. Other portable electronic devices with sensing functions. In an embodiment, the electronic device 100 may be, but not limited to, a portable or non-portable electronic device in a vehicle intelligence system. In one embodiment, the electronic device 100 may be, but not limited to, a smart home appliance, such as a TV, a computer, a refrigerator, a washing machine, a telephone, an induction cooker, a desk lamp, and the like.

FIG. 2 is a schematic diagram illustrating the display panel of FIG. 1 . Referring to FIG. 2 , the display panel 120 of this embodiment includes a plurality of display pixels 122 , a plurality of touch sensors 124 and a plurality of fingerprint sensors 126 . The electronic circuit 110 drives and controls the display panel 120 to perform display operation, touch sensing operation and fingerprint sensing operation. Specifically, the electronic circuit 110 drives and controls the display pixels 122 to display images via the display scan lines GDL and the display data lines SDL. The electronic circuit 110 also drives and controls the touch sensor 124 to sense a touch event of the display panel 120 via the touch scan line and the touch sense line 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 this embodiment, as shown in FIG. 2 , the touch sensor 124 of the display panel 120 may be an in-cell touch sensor. For the pixel-embedded touch sensor, the display panel 120 inherently does not have a touch scan line, and the touch driving signal can be directly transmitted to the touch sensor 124 through the touch sensing line TSL. For other types of touch sensors, the display panel 120 may have touch scan lines for transmitting touch driving signals. In the embodiment of FIG. 2 , 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 the fingerprint image on the display panel 120 via the fingerprint scanning line GSL and the fingerprint sensing line FSL.

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

FIG. 3 is a block schematic diagram illustrating the electronic circuit of FIG. 1 . Referring to FIG. 2 and FIG. 3 , the electronic circuit 110 may include a display driving circuit 112 , a fingerprint sensing circuit 116 and a touch sensing circuit 114 . The display driving circuit 112 is configured to drive and control the display pixels 122 to display images via the display scan lines GDL and the display data lines SDL. The display driving circuit 112 generates display driving signals for driving the display data lines 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. Display drive circuitry 112 may also include a controller or processor 123 for other control functions of display operation. The touch sensing circuit 114 is configured to drive and control the touch sensor 124 to sense a touch event of the display panel 120 via the touch sensing line TSL. The touch sensing circuit 114 may include a touch controller 141 , an analog front end (AFE) circuit, an analog-to-digital converter (ADC) circuit, and other functional circuits for touch sensing operations. The fingerprint sensing circuit 116 is configured to drive and control the fingerprint sensor 126 to sense a fingerprint on the display panel 120 via the fingerprint scanning line GSL and the fingerprint sensing line FSL. The fingerprint sensing circuit 116 receives a fingerprint sensing signal corresponding to a fingerprint image from the fingerprint sensor 126 and further processes 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.

In one embodiment, electronic circuit 110 is implemented as a single semiconductor die. When the electronic circuit 110 is implemented as a single chip integrated circuit capable of driving and controlling the display panel 120 for display operation, touch sensing operation, and fingerprint sensing operation, the electronic circuit 110 may include a control circuit 130, and the control circuit 130 is, for example, A micro-controller based core circuit is used to perform all control functions of display operation, touch sensing operation and fingerprint sensing operation. The control circuit 130 may include at least one of a timing controller 121 , a touch controller 141 , a digital circuit 161 and other controllers of the display driving circuit 112 or a processor 123 .

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

Regarding the hardware structure of the elements in the embodiment of FIG. 3 , the timing controller 121 , the touch controller 141 and the digital circuit 161 may be processors with computing capabilities. Alternatively, the timing controller 121, the touch controller 141, and the digital circuit 161 can be designed by hardware description language (hardware description language, HDL) or any other design method for digital circuits familiar to those skilled in the art, and can 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 descriptions 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 common knowledge in the related art, which will not be repeated below.

4 , 5A and 5B are schematic diagrams illustrating a wiring structure between an electronic circuit and a display panel according to an embodiment of the present invention. Referring to FIGS. 3 to 5B , the electronic circuit 110 includes a switch circuit SW1 (first switch circuit). The display panel 120 includes a switch circuit SW2 (second switch circuit). Switching circuit SW1 may be configured to be coupled to switching circuit SW2 via a transmission line 140 . In this embodiment, the switch circuit SW1 is configured in the electronic circuit 110, and the display panel 120 does not include the switch circuit SW1. Accordingly, the size of the frame border close to the electronic circuit in the display panel 120 near the electronic circuit 110 can be reduced.

The switch circuit SW1 includes a plurality of first terminals N1D and N1F, and a plurality of second terminals N2. The number of the first terminals N1D and the first terminals N1F is greater than the number of the second terminals N2. The first terminal N1D is coupled to the display driving circuit 112 . In this 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 to be coupled to the switch circuit SW2 of the display panel 120 via the transmission line 140 .

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

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

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

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

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

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

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

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

In the display driving phase, the control signal SW1SD turns on the first part 111 of the switching element 501, but turns off the second part 113 of the switching element 501 of the switching circuit SW1. In the display driving phase, the control signal SW2R, the control signal SW2G, the control signal SW2B, and the control signal SW2W also turn on the corresponding switching elements of the switching circuit SW2. The switch circuit SW2 is switched to receive the display driving signal S2 from the electronic circuit 110 in the display driving phase. Specifically, the third switching element 503 is switched to receive the display driving signal S2 from the electronic circuit 110 in the display driving phase. On the other hand, in the display driving phase, the control signal SW1FP and the control signal SW3FP turn off all the switching elements 502 of the switching circuit SW1, and the control signal SW2FP turns off the switching elements 504 and 505 of the switching circuit SW2.

Therefore, the display driving signal S2 is output from the electronic circuit 110 to the display panel 120 via the transmission line 140 and the switching circuits SW1 and SW2 . That is to say, the control circuit 130 generates the control signal SW1SD, the control signal SW2R, the control signal SW2G, the control signal SW2B and the control signal SW2W for controlling the switch circuit SW1 and the switch circuit SW2, so as to control the electronic circuit 110 through the The switch circuit SW1 (eg, the first part 111 of the switch element 501 ) and the switch circuit SW2 transmit the display drive signal S2 from the display drive circuit 112 to the data line SDL. In this embodiment, because the data line SDL coupled to the same first switch unit MUX2_1 is connected to four sub-pixels of different colors arranged in a pixel column, the display driving signal S2 is a multiplexed RGBW signal, and passes through the switch circuit SW1 and switch circuit SW2 are transmitted to corresponding data lines SDL on the display panel 120 .

In the fingerprint sensing stage, the control signal SW1FP and the control signal SW3FP turn on the corresponding switching elements of the switching circuit SW1, and the control signal SW2FP turns on the corresponding switching elements of the switching 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 switching element 504 and the fifth switching element 505 are switched to transmit the fingerprint sensing signal S3 to the electronic circuit 110 in the fingerprint sensing phase.

On the other hand, the control signal SW1SD turns off the corresponding switch elements of the switch circuit SW1, and the control signals SW2R, SW2G, SW2B, and SW2W turn off the corresponding switch elements 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 to say, the control circuit 130 generates the control signal SW1FP, the control signal SW3FP and the control signal SW2FP for controlling the switch circuit SW1 and the switch circuit SW2, so as to control the electronic circuit 110 to pass the switch circuit SW1 (for example, the Two switch elements 502 ) and the switch circuit SW2 receive the fingerprint sensing signal S3 from the fingerprint sensor 126 to the AFE circuit 163 of the fingerprint sensing circuit 116 . In this embodiment, the transmission line 140 is shared by the display driving signal S2 and the fingerprint sensing signal S3. The display driving signal S2 and the fingerprint sensing signal S3 are transmitted on the transmission line 140 in different stages.

In this embodiment, the switch unit MUX2_1 may be a 1:5 multiplexer in this embodiment. In the display driving phase, the control signal SW2R, the control signal SW2G, the control signal SW2B, and the control signal SW2W turn on the corresponding switching elements of the switching unit MUX2_1 in sequence. In the fingerprint sensing phase, the control signal SW2FP turns on the corresponding switching elements of the switching unit MUX2_1 and the switching unit MUX2_2.

FIG. 6 is a schematic diagram illustrating a wiring structure between an electronic circuit and a display panel according to an embodiment of the present invention. Referring to FIG. 4 and FIG. 6, the electronic device 100 of this embodiment is similar to the electronic device 100 shown in FIG. Neighboring. Every six first switch units MUX2_1 are grouped into a unit group, and each unit group is equipped with two second switch units MUX2_2 as shown in FIG. 6 . The second switch unit MUX2_2 is adjacent.

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

FIG. 7 is a schematic diagram illustrating a fan-out area corresponding to an electronic circuit according to an embodiment of the present invention. FIG. 8 is a schematic diagram showing a fan-out area corresponding to an electronic circuit in the related art. In the embodiment of FIGS. 4 to 6, the electronic circuit 110 outputs the display drive signal S2 to the display panel 120 via the same I/O node (eg, an I/O pin) as shown in FIGS. 5A and 5B and The fingerprint sensing signal S3 is received from the display panel 120 . The display driving 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 driving signal S2 and the fingerprint sensing signal S3. The number of I/O nodes is less, and the wiring between the electronic circuit 110 and the display panel 120 is simpler. Therefore, the width W1 corresponding to the fan-out region 910 of the electronic circuit 110 is smaller than the width W0 corresponding to the fan-out region 91 of the electronic circuit 11 . The embodiment of FIG. 7 can reduce the size of the border of the frame near the electronic circuit 110 in the display panel 120 . For example, even though the fingerprint sensing function is integrated into the electronic device 100 in this embodiment, the size of the frame border can still be maintained within a specified width of, for example, 2 mm.

FIG. 9 is a schematic diagram showing a wiring structure of an electronic circuit according to an embodiment of the present invention. Referring to FIG. 9 , in this embodiment, the switch circuit SW1 includes a plurality of switch units MUX1 , and each switch unit MUX1 includes a first switch element 501 and a second switch element 502 . The second switching element 502 includes a first switching device 502_1 and a second switching device 502_2. For clarity, only the fingerprint sensor 126 , the fingerprint scanning line GSL and the fingerprint sensing line FSL are shown in the display panel 120 . The detailed structure of the display panel 120 can refer to FIG. 4 .

In this embodiment, the electronic circuit 110 further includes a wire grouping circuit 119 . The wire grouping circuit 119 is coupled between the switch circuit SW1 and the AFE circuit 163 of the fingerprint sensing circuit 116 . The second switching elements 502 are grouped into a plurality of groups and connected to the AFE circuit 163 through the wire grouping circuit 119 . The control circuit 130 generates a control signal SW1FP and a control signal SW3FP for controlling the second switching element 502 . The second switching element 502 can be independently controlled by the control circuit 130 . The second switching element 502 includes a first switching device 502_1 and a second switching device 502_2. The control circuit 130 determines which second switch element 502 to turn on or off according to the touch information (eg, the touch area TSA shown in FIG. 10 ). For example, the second switch device 502_2 can be controlled to transmit the fingerprint sensing signal S3 to the fingerprint sensing circuit 116 in response to the determination of the touch information (such as the touch area TSA) in the fingerprint sensing stage, and turn on the corresponding second switch device 502_2. A switching device 502_1. The turned-on second switching element 502 establishes a coupling between the fingerprint sensing line FSL and the fingerprint sensing channel for fingerprint sensing operation.

In this embodiment, the wire grouping circuit 119 is coupled between the switch circuit SW1 and the AFE circuit 163 for connecting a plurality of fingerprint sensing lines FSL to each of the AFE circuits 163 in a wire-OR manner. sensing channel. By grouping the second switching elements, the wire grouping circuit 119 groups 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 fingerprint sensing lines FSL corresponds to a fingerprint sensing channel. For example, the AFE circuit 163 can be designed to have 200 fingerprint sensing channels, and the number of fingerprint sensing lines FSL is 1000. The 1000 fingerprint sensing lines are grouped into 200 groups of five fingerprint sensing lines each. 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 pass through the corresponding switch device 502_1 and switch device 502_2 and the wire grouping circuit 119 in the same The groups are connected to each other and coupled to the first fingerprint sensing channel. 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 pass through the corresponding switch device 502_1 and switch device 502_2 and the wire grouping circuit 119 are connected to each other in the same group and coupled to the second fingerprint sensing channel. The connections between the rest of the fingerprint sensing lines and the rest of the fingerprint sensing channels can be deduced by analogy. In the same group, the fingerprint sensing lines FSL are connected in a wire-OR manner and not shorted at the same time.

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 just for illustration, and the present invention is not limited thereto.

The control circuit 130 generates the control signal SW1FP, the control signal SW1SD and the control signal SW3FP for controlling the switch circuit SW1, so as to control the electronic circuit 110 to receive information from the fingerprint sensor 126 to the AFE circuit 163 through the switch circuit SW1 in the fingerprint sensing phase. Fingerprint sensing signal S3. In the fingerprint sensing stage, the control signal SW1FP and the control signal SW3FP turn on the corresponding switching elements of the switching circuit SW1 , and the control signal SW1SD turns off the corresponding switching elements of the switching circuit SW1 . In this embodiment, the first switching device 502_1 and the second switching device 502_2 are respectively controlled by different control signals SW1FP and SW3FP. The control signal SW1FP is asserted during the fingerprint sensing phase, and the control signal SW3FP is asserted according to the touch information during the fingerprint sensing phase. That is to say, 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.

FIG. 10 is a schematic diagram illustrating the operation of a display panel for fingerprint sensing according to an embodiment of the present invention. 4, FIG. 5A, FIG. 5B, FIG. 9 and FIG. 10, the electronic circuit 110 can drive and control the display panel 120 to sense one or more fingerprint images FPI_1, fingerprint image FPI_2, fingerprint detected on the display panel 120. Image FPI_3 and fingerprint image FPI_4. In this embodiment, the fingerprint sensing lines FSL extend in a direction Y (eg, vertical direction), and are arranged parallel and juxtaposed in a direction X (eg, horizontal direction), as shown in FIG. 2 . The display panel 120 is not pre-divided into fixed areas for fingerprint sensing in at least the direction X. That is to say, the display panel 120 does not have a fingerprint sensing area predetermined 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. The fingerprint sensing area 401, the fingerprint sensing area 402, the fingerprint sensing area 403, and the fingerprint sensing area 404 can be flexibly formed by selecting a part of the fingerprint sensing lines FSL arranged above the display panel 120. for fingerprint sensing. Edges or borders of the fingerprint sensing area 401 , the fingerprint sensing area 402 , the fingerprint sensing area 403 and the fingerprint sensing area 404 may correspond to any one of the fingerprint sensing lines FSL without limitation. Since the size and shape of the fingerprint sensing area are not predetermined in the X direction, there is no need to perform cross over sensing to process signals of different areas during the sensing process. Cross-area cross-sensing usually requires more fingerprint sensing time, which may cause sensing delay.

Specifically, the control circuit 130 determines one or more fingerprint images corresponding to the fingerprint image FPI_1, the fingerprint image FPI_2, the fingerprint image FPI_3, and the fingerprint image FPI_4 according to the touch sensing signal S1 output through the touch sensing line TSL as shown in FIG. touch area TSA. The control circuit 130 can determine the size and range of the touch area TSA, and the range of the touch area TSA can be determined by the touch area of a finger or can be a predetermined value. Alternatively, in one embodiment, the control circuit 130 may determine the coordinate information of the center or near the center of each touch area TSA and determine the size of the touch area TSA. The size of each touch area TSA may depend on design requirements, for example, the number of fingerprint sensing channels designed in the AFE circuit 163 . The touch area TSA corresponds to the fingerprint sensing area covering the fingerprint image.

In the fingerprint sensing stage, the control circuit 130 asserts the control signal SW1FP, and controls the first switch device 502_1 to be turned on by using the asserted control signal SW1FP. On the other hand, in the fingerprint sensing phase, the control circuit 130 validates 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 validated control signal SW3FP. The second switch device 502_2 turned on according to the touch area TSA may select a part 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 is turned on. In FIG. 11, the second switch device 502_2 corresponding to the selected fingerprint sensing line FSL is turned on according to the valid control signal SW3FP, and the second switch device 502_2 corresponding to the unselected fingerprint sensing line FSL is turned off according to the disabled control signal SW3FP. Two switch devices 502_2. 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 to say, 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.

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 this embodiment, a part of the fingerprint sensing line 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, and its size and range are determined by Touch area TSA to decide. Therefore, the AFE circuit 163 can receive the fingerprint sensing signals 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 (X direction) at one time (single-turn), without performing cross-region crossing. sensing operation. Therefore, it can solve the problem of cross-area cross-sensing when receiving the fingerprint sensing signals 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, thereby reducing the time for fingerprint sensing.

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

Specifically, in the fingerprint sensing phase, the control circuit 130 activates the control signal SW13FP according to the touch information. By using the effective control signal SW13FP, the control circuit 130 controls a part of the second switching elements 502 to be turned on. According to the touch area TSA. The portion of the second switching element 502 that is turned on may select the fingerprint sensing line FSL for a fingerprint sensing operation. That is, the second switching element 502 corresponding to the selected fingerprint sensing line FSL is turned on. In FIG. 11, the second switch element 502 corresponding to the selected fingerprint sensing line FSL is turned on according to the valid control signal SW13FP, and the second switch element 502 corresponding to the unselected fingerprint sensing line FSL is turned off according to the disabled control signal SW13FP. Two switching elements 502 .

In the above embodiments, the number of the fingerprint sensing lines FSL, the number of the fingerprint sensing channels, and the connections between the fingerprint sensing lines FSL and the fingerprint sensing channels are just for illustration, and the present invention is not limited thereto.

In addition, the operation of the electronic circuit 110 of this embodiment can be sufficiently taught, suggested and implemented in the embodiments of FIG. 9 and FIG. 10 , and thus no further description is provided herein.

FIG. 12 is a schematic diagram illustrating a detailed structure of a fingerprint sensor according to an embodiment of the present invention. Referring to FIG. 12 , the fingerprint sensor 126 operates between a system voltage VDD and a 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 column selection transistor SEL. The gate terminals of the reset transistor RST, the transfer transistor TX, and the column selection transistor SEL are controlled by the control signal RSTc, the control signal TXc, and the control signal SELc, respectively. These control signals are manipulated for fingerprint scanning control and are only enabled in the fingerprint sensing phase. In other words, the column selection transistor SEL of the fingerprint sensor 126 is turned off during the touch sensing phase, so that the fingerprint sensor 126 does not drive the fingerprint sensing line FSL. Therefore, the fingerprint sensor 126 does not affect the conducting state of the fingerprint sensing line FSL during the touch sensing phase. This helps to control the switching circuit SW1 and the switching circuit SW2 to transmit the synchronous driving signal S7 to the fingerprint sensing line FSL in the touch sensing phase. In addition, sufficient teachings, suggestions, and implementation descriptions for the operation of the fingerprint sensor 126 can be obtained by referring to common sense in the related art, and thus will not be repeated here.

To sum up, in the embodiments of the present invention, the display driving signal and the fingerprint sensing signal are transmitted on the same transmission line in different stages. The transmission lines are shared by display driving signals and fingerprint sensing signals. The electronic circuit outputs display drive signals to the display panel and receives fingerprint sensing signals from the display panel via the same pins connected to the transmission lines. The wiring between the electronic circuit and the display panel is relatively simple. The width corresponding to the fan-out area of the electronic circuit and the size of the border of the frame in the display panel close to the electronic circuit may also be smaller. In addition, the touch area is determined as a fingerprint sensing area for forming a fingerprint image. The control circuit selects a portion of the fingerprint sensing line for a 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 the fingerprint sensing line corresponding to the touch area from among the multiple fingerprint sensing lines of the display panel, it is possible to flexibly form a fingerprint sensing area whose size/range is determined by the touch area, so that the fingerprint sensing channel can be used in the horizontal direction at one time. (single-turn) receiving the fingerprint sensing signal can reduce the time for fingerprint sensing. Therefore, the method for fingerprint sensing and identification is more efficient, and the user can have a good user experience.

In addition, the fingerprint sensing signal is transmitted from the fingerprint sensing line to the electronic circuit via the transmission line, and the switch circuit of the display panel has a switch unit for the signal transmission of the fingerprint sensing signal. Therefore, under the condition that the transmission line is shared by the display driving signal and the fingerprint sensing signal, the resolution of the fingerprint image can also be maintained.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field may make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention should be defined by the scope of the appended patent application.

11, 110: electronic circuit 91, 910: Fan-out area 100: Electronic device 111: Part One 112: Display drive circuit 113: Part Two 114: Touch sensing circuit 116: Fingerprint sensing circuit 119: wire grouping circuit 120: display panel 121: Timing controller 122: display pixels 122_1, 122_2, 122_3, 122_4: pixels 123: Other controllers or processors 124: Touch sensor 125. MUX2_1: the first switch unit 127. MUX2_2: second switch unit 126:Fingerprint sensor 130: control circuit 140: Transmission line 141:Touch controller 161: Digital circuit 163: Analog front-end circuit 401, 402, 403, 404: fingerprint sensing area 501: the first switching element 502: second switching element 502_1: First switching device 502_2: Second switching device 503: the third switching element 504: the fourth switching element 505: fifth switching element B: blue sub-pixel BPT: bypass transistor DAC: signal converter FPI_1, FPI_2, FPI_3, FPI_4: fingerprint image FSL: Fingerprint Sensing Line G: Green sub-pixel GDL: display scanline GND, VDD: system voltage GSL: Fingerprint Scanning Line MUX1: switch unit N1D, N1F: first terminal N2: the second terminal N3D, N3F: the third terminal N4: The fourth terminal N5F: fifth terminal N6: the sixth terminal PD: photodiode R: red subpixel RST: reset transistor RSTc, SELc, SW13FP, SW1FP, SW1SD, SW2B, SW2FP, SW2G, SW2R, SW2W, SW3FP, TXc: control signal S1: touch sensing signal S2: display drive signal S3: Fingerprint sensing signal S7: Synchronous drive signal SDL: Display Data Line SEL: column selection transistor SOP: output buffer SW1, SW2: switch circuit TSA: Touch Area TSL: Touch Sensing Line TX: transfer transistor W: white subpixel W0, W1: Width

FIG. 1 is a schematic block diagram illustrating an electronic device according to an embodiment of the present invention. FIG. 2 is a schematic diagram illustrating the display panel of FIG. 1 . FIG. 3 is a block schematic diagram illustrating the electronic circuit of FIG. 1 . 4 , 5A and 5B are schematic diagrams illustrating a wiring structure between an electronic circuit and a display panel according to an embodiment of the present invention. FIG. 6 is a schematic diagram illustrating a wiring structure between an electronic circuit and a display panel according to another embodiment of the present invention. FIG. 7 is a schematic diagram illustrating a fan-out area corresponding to an electronic circuit according to an embodiment of the present invention. FIG. 8 is a schematic diagram showing a fan-out area corresponding to an electronic circuit in the related art. FIG. 9 is a schematic diagram showing a wiring structure of an electronic circuit according to an embodiment of the present invention. FIG. 10 is a schematic diagram illustrating the operation of a display panel for fingerprint sensing according to an embodiment of the present invention. FIG. 11 is a schematic diagram showing a wiring structure of an electronic circuit according to another embodiment of the present invention. FIG. 12 is a schematic diagram illustrating a detailed structure of a fingerprint sensor according to an embodiment of the present invention.

110: Electronic circuit

112: Display drive circuit

114: Touch sensing circuit

116: Fingerprint sensing circuit

121: Timing controller

123: Controller/processor

130: control circuit

141:Touch controller

161: Digital circuit

Claims (45)

An electronic circuit adapted to drive a display panel including a touch sensor and a fingerprint sensor, the electronic circuit comprising: a first circuit configured to generate a display drive signal for driving a data line of the display panel; Two circuits, configured to receive fingerprint sensing signals corresponding to fingerprint images from the fingerprint sensor; a first switching circuit, including a plurality of first switching elements coupled to the first circuit and coupled to the second a plurality of second switching elements of a circuit; and a control circuit configured to generate a control signal for controlling said first switching circuit and for: controlling said electronic circuit to pass said first switch during a first time interval The first part of the element transmits the display driving signal from the first circuit to the data line, and controls the electronic circuit to transmit the display drive signal from the display panel through the second switching element in a second time interval. The fingerprint sensor receives the fingerprint sensing signal. The electronic circuit of claim 1, wherein the control circuit turns on the first portion of the first switching element and turns off a second portion of the first switching element during the first time interval. The electronic circuit of claim 2, wherein the control circuit turns off all of the second switching elements during the first time interval. The electronic circuit of claim 1, wherein the control circuit turns off all of the first switching elements during the second time interval. The electronic circuit of claim 1, wherein the first time interval corresponds to a display driving phase, and the second time interval corresponds to a fingerprint sensing phase. The electronic circuit of claim 1, wherein the first switch circuit comprises: a plurality of first terminals coupled to the first circuit and the second circuit; and a plurality of second terminals configurable to couple to the second switch circuit on the display panel. The electronic circuit according to claim 6, wherein the first switch circuit includes a plurality of switch units, and each switch unit of the first switch circuit includes: one of the first switch elements a switching element coupled between the first circuit and a corresponding one of the second terminals; and a second switching element of the second switching element coupled between the second circuit and the between the corresponding one of the second terminals. The electronic circuit according to claim 7, wherein the second switching element comprises: a first switching device coupled to the corresponding one of the second terminals and the second circuit, and controlled to transmit the fingerprint sensing signal to the second circuit during the second time interval; and a second switching device coupled between the first switching device and the second circuit and controlled to transmit the fingerprint sensing signal to the second circuit in response to touch information, wherein the first switching device A switching device and said second switching device are controlled by different control signals. The electronic circuit as claimed in claim 6, wherein the second switch circuit includes: a plurality of third terminals, coupled to the data line and the fingerprint sensing line of the display panel; and a plurality of fourth terminals, configurable coupled to the second terminal of the first switch circuit. The electronic circuit according to claim 9, wherein the second switch circuit includes a plurality of first switch units, and each of the first switch units of the second switch circuit includes: a plurality of third switch elements, coupled between a respective first portion of said third terminal and a fourth one of said fourth terminals, and switches said third switching element to receive said electronic circuit during said first time interval the display driving signal; and one or more fourth switching elements, coupled between the corresponding second portion of the third terminal and the one of the fourth terminals, and switching the fourth A switching element to transmit the fingerprint sensing signal to the electronic circuit during the second time interval. The electronic circuit of claim 10, wherein The first portion of the third terminal is coupled to the data line of the display panel, and the second portion of the third terminal is coupled to the fingerprint sensing line. The electronic circuit according to claim 10, wherein the data lines coupled to the same first switch unit are connected to sub-pixels of four different colors, and the sub-pixels of the four different colors are arranged in a row. The electronic circuit according to claim 10, wherein the second switch circuit further comprises: a plurality of fifth terminals coupled to the fingerprint sensing lines of the display panel; and a plurality of sixth terminals configured to be coupled to the second terminal of the first switching circuit. The electronic circuit according to claim 13, wherein the second switch circuit further includes a plurality of second switch units, and each of the second switch units of the second switch circuit includes: a fifth switch element coupled to between the respective fifth terminal and the respective sixth terminal, wherein the fifth switching element is switched to transmit the fingerprint sensing signal to the electronic circuit during the second time interval the second switching element. The electronic circuit of claim 14, wherein at least two of the second switching units are adjacent. The electronic circuit according to claim 14, wherein the second switching units are not adjacent to each other. The electronic circuit of claim 1, wherein the electronic circuit is implemented in a semiconductor wafer. A display panel, comprising: a plurality of pixels and a touch sensor; a plurality of data lines coupled to the pixels and configured to receive a display drive signal; a plurality of fingerprint sensors configured to sense a fingerprint image and generate a fingerprint corresponding to the fingerprint image Sensing signals; a plurality of fingerprint sensing lines, coupled to the fingerprint sensor and configured to transmit the fingerprint sensing signals; and a switch circuit, including: a plurality of first switch units, coupled to the data lines and the a first part of the fingerprint sensing line; and a plurality of second switching units coupled to the second part of the fingerprint sensing line, wherein the first switching unit is switched to receive the display from the electronic circuit in a first time interval driving signal, and switch the first switch unit and the second switch unit to transmit the fingerprint sensing signal to the electronic circuit in a second time interval. The display panel as claimed in claim 18, wherein the switch circuit includes: a plurality of first terminals coupled to the data line and the fingerprint sensing line; and a plurality of second terminals configurable to be coupled to the electronic circuit. The display panel according to claim 19, wherein each of the first switch units includes: a plurality of first switch elements, coupled between a corresponding first part of the first terminal and a second one of the second terminals between terminals, and switches the first switching element to receive the display drive signal from the electronic circuit during the first time interval; and one or more second switching elements coupled between respective second portions of the first terminals and the one of the second terminals and switching the second switching elements to switch between the The fingerprint sensing signal is transmitted to the electronic circuit during a second time interval. The display panel of claim 20, wherein the first portion of the first terminal is coupled to the data line of the display panel, and the second portion of the first terminal is coupled to the fingerprint sensing line. The display panel according to claim 21, wherein the data lines coupled to the same first switch unit are connected to sub-pixels of four different colors, and the sub-pixels of the four different colors are arranged in a row. The display panel as claimed in claim 20, wherein the switch circuit further comprises: a plurality of third terminals coupled to the fingerprint sensing lines of the display panel; and a plurality of fourth terminals configurable to be coupled to the the electronic circuit. The display panel according to claim 23, wherein each of the second switch units includes: a third switch element coupled between the corresponding third terminal and the corresponding fourth terminal, wherein the third A switching element to transmit the fingerprint sensing signal to the electronic circuit during the second time interval. The display panel according to claim 24, wherein at least two of the second switch units are adjacent. The display panel as claimed in claim 24, wherein the second switch units are not adjacent to each other. The display panel as claimed in claim 18, wherein the first time interval corresponds to a display driving phase, and the second time interval corresponds to a fingerprint sensing phase. An electronic device comprising: a display panel including a touch sensor and a fingerprint sensor; and an electronic circuit configurable to be coupled to the display panel and adapted to drive the display panel with a display drive signal and from the The fingerprint sensor receives a fingerprint sensing signal corresponding to a fingerprint image, wherein the electronic circuit includes a first switch circuit, the first switch circuit includes a plurality of first switch elements and a plurality of second switch elements, and the An electronic circuit generates a control signal for controlling the first switching circuit to transmit the display driving signal to the display panel through the first part of the first switching element in a first time interval, and in a second time interval The fingerprint sensing signal is received from the fingerprint sensor through the second switching element during a time interval, wherein the first switching element is used to transmit the display driving signal to the display panel. The electronic device according to claim 28, wherein the first time interval corresponds to a display driving phase, and the second time interval corresponds to a fingerprint sensing phase. The electronic device according to claim 28, wherein the electronic circuit comprises: a first circuit configured to generate the display driving signal for driving a data line of the display panel through the first switching circuit; A second circuit configured to receive the fingerprint sensing signal corresponding to the fingerprint image from the fingerprint sensor through the first switch circuit; and a control circuit configured to generate a signal for controlling the first switch the control signal of the circuit, and for: controlling the electronic circuit to transmit the display driving signal from the first circuit to the the data line, and control the electronic circuit to receive the fingerprint sensor from the fingerprint sensor of the display panel through the second switch element and the first switch circuit in the second time interval test signal. The electronic device of claim 30, wherein the control circuit turns on the first portion of the first switching element and turns off a second portion of the first switching element during the first time interval. The electronic device according to claim 31, wherein the control circuit turns off all of the second switching elements during the first time interval. The electronic device according to claim 30, wherein the control circuit turns on all the second switching elements and turns off all the first switching elements during the second time interval. The electronic device as claimed in claim 30, wherein the first switch circuit comprises: a plurality of first terminals coupled to the first circuit and the second circuit; and a plurality of second terminals configured to be coupled to the second switch circuit on the display panel. The electronic device according to claim 34, wherein the first switch circuit includes a plurality of switch units, each of the switch units of the first switch circuit includes: a first switch in the first switch element an 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 during the first time interval and a second switching element of the second switching elements coupled between the second circuit and the corresponding one of the second terminals and controlled to switch between the second transmitting the fingerprint sensing signal to the second circuit in a time interval. The electronic device as claimed in claim 35, wherein the second switching element comprises: a first switching device coupled to the corresponding one of the second terminals and the second circuit, and controlled to transmit the fingerprint sensing signal to the second circuit during the second time interval; and a second switching device coupled between the first switching device and the second circuit and controlled The fingerprint sensing signal is transmitted to the second circuit in response to touch information, wherein the first switching device and the second switching device are controlled by different control signals. The electronic device of claim 28, wherein the electronic circuit is implemented in a semiconductor wafer. The electronic device according to claim 28, wherein the display panel further comprises: a plurality of pixels; a plurality of data lines coupled to the pixels and configured to receive the display driving signal; a plurality of fingerprint sensing lines coupled to The fingerprint sensor is configured to transmit the fingerprint sensing signal; and the second switch circuit includes: a plurality of third terminals coupled to the data line and the fingerprint sensing line; and a plurality of fourth terminals , may be configured to be coupled to the electronic circuit. The electronic device according to claim 38, wherein the second switch circuit includes a plurality of first switch units, and each of the first switch units of the second switch circuit includes: a plurality of third switch elements, coupled between a respective first portion of the third terminal and a fourth one of the fourth terminals, and switches the third switching element to receive the a display drive signal; and one or more fourth switching elements coupled between a corresponding second portion of the third terminal and the one of the fourth terminals, and switching the first Four switching elements to transmit the fingerprint sensing signal to the electronic circuit during the second time interval. The electronic device as claimed in claim 39, wherein the first portion of the third terminal is coupled to the data line of the display panel, and the second portion of the third terminal is coupled to the fingerprint sensing line. The electronic device according to claim 39, wherein the data lines coupled to the same first switch unit are connected to sub-pixels of four different colors, and the sub-pixels of the four different colors are arranged in a row. The electronic device according to claim 39, wherein the second switch circuit further comprises: a plurality of fifth terminals coupled to the fingerprint sensing lines of the display panel; and a plurality of sixth terminals configured to be coupled to the second terminal of the first switching circuit. The electronic device according to claim 42, wherein the second switch circuit further includes a plurality of second switch units, and each of the second switch units of the second switch circuit includes: a fifth switch element coupled to between the respective fifth terminal and the respective sixth terminal, wherein the fifth switching element is switched to transmit the fingerprint sensing signal to the electronic circuit during the second time interval the second switching element. The electronic device according to claim 43, wherein at least two of the second switch units are adjacent. The electronic device according to claim 43, wherein the second switch units are not adjacent to each other.

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