WO2021218071A1 - 具有指纹感测功能的电子装置 - Google Patents

具有指纹感测功能的电子装置 Download PDF

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Publication number
WO2021218071A1
WO2021218071A1 PCT/CN2020/123152 CN2020123152W WO2021218071A1 WO 2021218071 A1 WO2021218071 A1 WO 2021218071A1 CN 2020123152 W CN2020123152 W CN 2020123152W WO 2021218071 A1 WO2021218071 A1 WO 2021218071A1
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electrically connected
circuit
electronic device
pixels
pixel
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PCT/CN2020/123152
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English (en)
French (fr)
Inventor
黄耀立
林郁轩
彭子洋
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神盾股份有限公司
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Priority to KR1020227033680A priority Critical patent/KR20220145904A/ko
Priority to US17/802,531 priority patent/US20230152916A1/en
Publication of WO2021218071A1 publication Critical patent/WO2021218071A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
    • G—PHYSICS
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    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2085—Special arrangements for addressing the individual elements of the matrix, other than by driving respective rows and columns in combination
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275—Details of drivers for data electrodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/131—Interconnections, e.g. wiring lines or terminals
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H10K59/351—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/40—OLEDs integrated with touch screens
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
    • H10K59/65—OLEDs integrated with inorganic image sensors
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery

Definitions

  • the invention relates to a device, in particular to an electronic device with fingerprint sensing function.
  • fingerprint recognition technology has been widely used in various electronic devices to provide various identity login or identity verification functions.
  • the current technical principles of fingerprint recognition include optical, capacitive, thermal, and ultrasonic.
  • the fingerprint sensor since the above-mentioned fingerprint sensors are installed in the electronic device, the fingerprint sensor usually needs to occupy a part of the device volume of the electronic device.
  • the general fingerprint sensor can be installed or attached to the bottom of the screen, the Home button or the body of the electronic device, for example. Back and so on. In other words, the general fingerprint sensor will increase the overall device volume or thickness of the electronic device, and further increase the manufacturing cost of the electronic device. In view of this, the following will propose solutions in several embodiments.
  • the present invention is directed to an electronic device that can provide a large-area fingerprint sensing function.
  • the electronic device of the present invention includes a touch display panel and an integrated chip.
  • the touch display panel includes a pixel array.
  • the integrated chip is electrically connected to the pixel array.
  • the integrated chip includes a fingerprint sensing circuit and a display driving circuit.
  • the fingerprint sensing circuit and the display driving circuit are electrically connected to a plurality of display data lines and sensing data lines through the same pin.
  • the plurality of display data lines are respectively electrically connected to a plurality of color sub-pixels of the pixel array.
  • the sensing data line is electrically connected to a plurality of fingerprint sensing pixels of the pixel array.
  • the plurality of color sub-pixels are a plurality of organic light emitting diode pixels.
  • the electronic device of the present invention can realize the full-screen fingerprint sensing function by forming a plurality of fingerprint sensing pixels in the pixel array of the touch display panel, and because the fingerprint sensing pixels are embedded in the touch display panel Therefore, the electronic device of the present invention can effectively reduce the space of the functional module required for fingerprint sensing, thereby reducing the overall device volume or thickness of the electronic device.
  • FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the present invention.
  • FIG. 2 is a schematic circuit diagram of a part of a pixel array according to an embodiment of the present invention.
  • FIG. 3 is a schematic circuit diagram of an integrated chip and a switching circuit according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of internal functional circuits of an integrated chip according to an embodiment of the present invention.
  • FIG. 5 is a signal timing diagram of a plurality of signals used to operate an integrated chip according to an embodiment of the present invention.
  • 131_2 analog to digital converter
  • demultiplexer 141, 142, 143, 144, 145: demultiplexer
  • D1 ⁇ D4, D6 display data line
  • G1, G2 grid lines
  • T1 ⁇ T7 Transistor
  • FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the invention.
  • the electronic device 100 includes a touch display panel 110, a pixel array 120 and an integrated chip (IC) 130.
  • the pixel array 120 is electrically connected to the integrated chip 130.
  • the touch display panel 110 may include, for example, a glass substrate and a touch panel.
  • the pixel array 120 is formed on the glass substrate in the active area (AA) of the touch display panel 110.
  • the integrated chip 130 is formed in the peripheral area (PA) of the touch display panel 110.
  • the integrated chip 130 includes a fingerprint sensing circuit 131 and a display driving circuit 132. It is worth noting that the touch display panel 110 of this embodiment may adopt an in-cell fingerprint, touch and display panel architecture.
  • the integrated chip 130 may be a fingerprint, touch and display driver integrated (Fingerprint, Touch, Display Driver Integrated, FTDDI) chip.
  • the integrated chip 130 can be electrically connected to a plurality of display pixels and a plurality of fingerprint sensing pixels in the pixel array 120 through the same pin (Pin), and the integrated chip 130 drives the touch in a time-sharing manner.
  • the integrated chip 130 of this embodiment can drive the display module and the fingerprint sensor module in the touch display panel 110 with fewer pins, thereby effectively reducing the space occupied by the pins and circuits in the electronic device 100.
  • the electronic device 100 is, for example, a smart phone, a tablet computer, a game console, or other electronic products with a fingerprint recognition function.
  • the touch display panel 110 may, for example, include an Organic Light-Emitting Diode (OLED) display panel, so the multiple color sub-pixels of the multiple pixel units of the pixel array 120 are multiple organic light-emitting diode pixel units.
  • the plurality of pixel units of the pixel array 120 can be composed of a plurality of first color sub-pixels, a plurality of second color sub-pixels, a plurality of third color sub-pixels, and a plurality of fingerprint sensing pixels. Constituted.
  • the first to third color sub-pixels may be, for example, red color sub-pixels, green color sub-pixels, and blue color sub-pixels, but the present invention is not limited thereto.
  • the plurality of pixel units of the pixel array 120 may further include a plurality of fourth color sub-pixels, where the fourth color sub-pixels may be, for example, white color sub-pixels, but the present invention is not limited thereto.
  • the plurality of color sub-pixels may be formed on the first semiconductor layer of the touch display panel 110, and the plurality of fingerprint sensing pixels may be formed on the first semiconductor layer of the touch display panel 110.
  • the second semiconductor layer may be formed on the first semiconductor layer of the touch display panel 110.
  • FIG. 2 is a schematic circuit diagram of a part of a pixel array according to an embodiment of the present invention.
  • the pixel unit 120P in FIG. 2 is a configuration result of one pixel in the pixel array 120.
  • the pixel unit 120P includes a first color subpixel 121, a second color subpixel 122, a third color subpixel 123, a fourth color subpixel 124, and a fingerprint sensing pixel 125.
  • the first color subpixel 121, the second color subpixel 122, the third color subpixel 123, the fourth color subpixel 124, and the fingerprint sensing pixel 125 are electrically connected to the gate line G1.
  • the gate line G2 is used to electrically connect to the pixel unit of the next column, and so on.
  • the first color sub-pixel 121 to the fourth color sub-pixel 124 are electrically connected to the display data lines D1 to D4, respectively.
  • the fingerprint sensing pixel 125 is electrically connected to the sensing data line D5.
  • the display data line D6 is used to electrically connect to the sub-pixels of the next row, and so on.
  • the gate line G1 can be used to receive a scan signal to turn on the first color sub-pixel 121, the second color sub-pixel 122, the third color sub-pixel 123, the fourth color sub-pixel 124, and the fingerprint sensing pixel 125 .
  • the display data lines D1 to D4 are used to transmit a plurality of display driving signals (display data) provided by the integrated chip 130 to the first color sub-pixel 121, the second color sub-pixel 122, and the third color sub-pixel.
  • the sensing data line D5 is used to transmit the sensing signal of the fingerprint sensing pixel 125 to the integrated chip 130, so that the integrated chip 130 can generate a corresponding fingerprint sensing image according to the sensing signal.
  • the arrangement order of the color sub-pixels of the present invention is not limited to the above. Moreover, the placement position of the fingerprint sensing pixel 125 can also be set between any two color sub-pixels.
  • Fig. 3 is a schematic circuit diagram of an integrated chip and a switching circuit according to an embodiment of the present invention.
  • the integrated chip 130 includes a fingerprint sensing circuit 131 and a display driving circuit 132.
  • the fingerprint sensing circuit 131 and the display driving circuit 132 are electrically connected to one end of the switching transistors T1 to T5 through the same pin N1 (that is, forming a common pin), and the other ends of the switching transistors T1 to T5 It is electrically connected to the display data lines D1 to D4 and the sensing data line D5.
  • the control ends of the switching transistors T1 to T5 are electrically connected to demultiplexers (Demultiplexer, DMUX) 141 to 145, respectively.
  • Demultiplexer DMUX
  • the demultiplexers 141 to 145 switch signals to the switching transistors T1 to T5 with different timings to receive signals from the color sub-pixels 121 to 124 or the fingerprint sensing pixel 125 in different periods.
  • the demultiplexers 141 to 145 may be composed of one or more transistors or switch circuits, respectively, and the demultiplexers 141 to 145 may form a demultiplexer circuit.
  • the display data lines D1 to D4 and the sensing data line D5 are electrically connected to a row pixel group of the pixel array 120, wherein the row pixel group may include a plurality of pixel units 120P according to the above-mentioned embodiment of FIG. 2
  • the sequence is arranged along the data line.
  • the fingerprint sensing circuit 131 and the display driving circuit 132 of the integrated chip 130 provide a plurality of data signals via the same pin N1 to a plurality of rows of pixel groups electrically connected to the display data lines D1 to D4. Color sub-pixels, and receive the sensing results of multiple fingerprint sensing pixels in the row pixel group through the sensing data line D5.
  • the pin N1 may also be electrically connected to other multiple row pixel groups in the pixel array 120, or the integrated chip 130 may be electrically connected via another plurality of pins similar to the pin N1. It is connected to other multiple row pixel groups in the pixel array 120.
  • the timing of the multiple switching signals, multiple display driving signals, and sensing signals of this embodiment will be described in detail in the following embodiment of FIG. 5.
  • Fig. 4 is a schematic diagram of internal functional circuits of an integrated chip according to an embodiment of the present invention.
  • the integrated chip 130 includes a fingerprint sensing circuit 131, a display driving circuit 132 and a control circuit 133.
  • the control circuit 133 is electrically connected between the pin N1 and the fingerprint sensing circuit 131 via the first switching circuit, and is electrically connected between the pin N1 and the display driving circuit 132 via the second switching circuit .
  • the control circuit is used to alternately turn on the first switching circuit and the second switching circuit.
  • the first switching circuit may be a switching transistor T6, and the second switching circuit may be a switching transistor T7, but the present invention is not limited to this.
  • One end of the switch transistor T6 is electrically connected to the pin N1, and one end of the switch transistor T7 is electrically connected to the pin N1 and one end of the switch transistor T6.
  • the control terminals of the switching transistor T6 and the switching transistor T7 are electrically connected to the control circuit 133.
  • the control circuit 133 can output two switching signals S1 and S2 to the switching transistor T6 and the switching transistor T7 to control the switching transistor T6 and the switching transistor T7.
  • the fingerprint sensing circuit 131 includes an amplifier 131_1, an analog-to-digital converter 131_2, and a digital processor 131_3.
  • the input end of the amplifier 131_1 is electrically connected to the other end of the switching transistor T6.
  • the input terminal of the analog-to-digital converter 131_2 is electrically connected to the output terminal of the amplifier 131_1.
  • the digital processor 131_3 is electrically connected to the output terminal of the analog-to-digital converter 131_2.
  • the display driving circuit 132 includes a source amplifier 132_1 and a timing control circuit 132_2.
  • the input end of the source amplifier 132_1 is electrically connected to the timing control circuit 132_2, and the output end of the source amplifier 132_1 is electrically connected to the other end of the switching transistor T7.
  • the pin N1 is electrically connected to the switching transistors T1 to T5 on the side opposite to the pin N1.
  • the switching transistors T1 to T5 are electrically connected to the display data lines D1 to D4 and the sensing data line D5.
  • the amplifier 131_1 can receive the sensing signal and provide the amplified sensing signal FS to the analog-to-digital converter 131_2.
  • the analog-to-digital converter 131_2 can provide the digital signal of the fingerprint sensing result to the digital processor 131_3, so that the digital processor 131_3 can generate fingerprint sensing information according to the digital signal provided by the analog-to-digital converter 131_2, for example, generate fingerprints Sensing images.
  • the timing control circuit 132_2 of the display driving circuit 132 can provide a timing control signal to the source amplifier 132_1, so that the source amplifier 132_1 outputs the display driving signal DS according to the designed display timing.
  • FIG. 5 is a signal timing diagram of a plurality of signals used to operate an integrated chip according to an embodiment of the present invention.
  • time t0 to time t6 is the driving period of the pixel unit 120P (or called the driving period of a row of pixel groups), where the driving period includes a display driving period and a fingerprint sensing period, and the display driving period and The fingerprint sensing period does not overlap, for example, the display driving period is from time t0 to time t5.
  • the fingerprint sensing period is from time t5 to time t6.
  • the color sub-pixels 121 to 124 and the fingerprint sensing pixel 125 of the pixel unit 120P receive the scan signal GS1 via the gate line G1, and are turned on from time t0 to time t5.
  • the switching transistor T7 receives the switching signal S1
  • the switching transistor T6 receives the switching signal S2.
  • the switching transistors T1 to T5 respectively receive the switching signals M_1 to M_5 provided by the demultiplexers 141 to 145, respectively.
  • the switching transistor T6 is off during the display driving period (time t0 to time t5), and the switching transistor T7 is on during the display driving period (time t0 to time t5).
  • the display driving period includes four sub display driving periods.
  • the four sub display driving periods are time t1 to time t2, time t2 to time t3, time t3 to time t4, and time t4 to time t5, respectively.
  • the switching transistors T1 to T4 receive the switching signals M_1 to M_4 during the four sub-display driving periods and are turned on in different periods, and the switching transistor T5 is turned off.
  • the signal waveforms of the switching signals M_1 to M_4 do not overlap each other in time.
  • the display driving circuit 132 outputs the first to fourth display driving signals in different periods via the pin N1 (as shown in FIG. 5, the display driving signal DS is in the four sub-display driving periods). Waveform) to display data lines D1 ⁇ D4.
  • the display driving circuit 132 can output the display driving signal DS to the color sub-pixels 121 to 124 via the display data lines D1 to D4, so that the pixel unit 120P performs a display function.
  • the display driving signal DS in FIG. 5 only represents the timing relationship of the signal waveform, rather than the actual signal waveform.
  • the voltage level or the level of the display data of the display driving signal DS can be determined by different display effects or individual sub-pixel types, and the present invention is not limited.
  • the switching transistor T5 is turned on during the fingerprint sensing period (time t5 to time t6), and the switching transistor T6 is turned off during the fingerprint sensing period (time t5 to time t6).
  • the switching transistors T1 to T4 are off, and the switching transistor T5 is on.
  • the signal waveform of the switching signal M_5 does not overlap with the signal waveforms of the switching signals M_1 to M_4. Therefore, the fingerprint sensing circuit 131 can receive the sensing signal FS from the fingerprint sensing pixel 125 via the sensing data line D5, so that the pixel unit 120P performs a fingerprint sensing function.
  • the sensing signal FS in FIG. 5 only represents the timing relationship of the signal waveform, rather than the actual signal waveform. In this regard, the voltage level or potential level of the sensing data of the sensing signal FS can be determined by different sensing results.
  • the electronic device of the present invention implements an in-cell fingerprint, touch and display panel architecture, and uses fingerprint, touch and display driver integrated chips to drive multiple embedded Touch display panel with fingerprint sensing pixels. Therefore, the electronic device of the present invention can save the space occupied by the driving circuit in the peripheral area of the panel in the peripheral area of the panel.
  • the integrated chip of the present invention can transmit the display driving signal and the sensing signal through the same pin, which can effectively save the space occupied by the pins and the circuit in the peripheral area of the panel.

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  • Engineering & Computer Science (AREA)
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  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
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  • Computer Hardware Design (AREA)
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  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

本发明提供一种具有指纹感测功能的电子装置。电子装置包括触控显示面板以及集成芯片。触控显示面板包括像素阵列。集成芯片电性连接至像素阵列。集成芯片包括指纹感测电路以及显示驱动电路。指纹感测电路以及显示驱动电路经由同一个接脚电性连接至多个显示数据线以及感测数据线。所述多个显示数据线分别电性连接至像素阵列的多个颜色子像素。感测数据线电性连接至像素阵列的多个指纹感测像素。所述多个颜色子像素为多个有机发光二极管像素。

Description

具有指纹感测功能的电子装置 技术领域
本发明涉及一种装置，尤其涉及一种具有指纹感测功能的电子装置。
背景技术
近年来，指纹识别技术被广泛地应用在各式电子装置上，以提供各种身份登录或身份验证功能。目前现有的指纹识别的技术原理包括光学式、电容式、热敏式和超声波式等。对此，由于上述几种方式的指纹传感器设置于电子装置，指纹传感器通常需要占有电子装置的一部分装置体积，其中一般的指纹传感器可例如设置或外挂在电子装置的屏幕下方、Home键或机身背部等。换言之，一般的指纹传感器会造成电子装置的整体装置体积或厚度增加，且进而导致电子装置的制造成本的增加。有鉴于此，以下将提出几个实施例的解决方案。
发明内容
本发明是针对一种电子装置可提供大面积的指纹感测功能。
根据本发明的实施例，本发明的电子装置包括触控显示面板以及集成芯片。触控显示面板包括像素阵列。集成芯片电性连接至像素阵列。集成芯片包括指纹感测电路以及显示驱动电路。指纹感测电路以及显示驱动电路经由同一个接脚电性连接至多个显示数据线以及感测数据线。所述多个显示数据线分别电性连接至像素阵列的多个颜色子像素。感测数据线电性连接至像素阵列的多个指纹感测像素。所述多个颜色子像素为多个有机发光二极管像素。
基于上述，本发明的电子装置可通过在触控显示面板的像素阵列中形成多个指纹感测像素的方式来实现全屏指纹感测功能，并且由于指纹感测像素内嵌于触控显示面板当中，因此本发明的电子装置可有效降低指纹感测所需的功能模块空间，进而可降低电子装置的整体装置体积或厚度。
为让本发明的上述特征和优点能更明显易懂，下文特举实施例，并配合附图做详细说明如下。
附图说明
图1是本发明一实施例的电子装置的示意图；
图2是本发明一实施例的部分像素阵列的电路示意图；
图3是本发明一实施例的集成芯片与切换电路的电路示意图；
图4是本发明一实施例的集成芯片的内部功能电路示意图；
图5是本发明一实施例的用于操作集成芯片的多个信号的信号时序图。
附图标记说明
100:电子装置；
110:触控显示面板；
120:像素阵列；
130:集成芯片；
131:指纹感测电路；
131_1:放大器；
131_2:模拟至数字转换器；
131_3:数字处理器；
132:显示驱动电路；
132_1:源极放大器；
132_2:时序控制电路；
133:控制电路；
141、142、143、144、145:解多路复用器；
D1～D4、D6:显示数据线；
D5:感测数据线；
DS:显示驱动信号；
G1、G2:栅极线；
GS1:扫描信号；
FS:感测信号；
M_1～M_5、S1、S2:切换信号；
N1:接脚；
T1～T7:晶体管；
t0～t6:时间。
具体实施方式
现将详细地参考本发明的示范性实施例，示范性实施例的实例说明于附图中。只要有可能，相同元件符号在附图和描述中用来表示相同或相似部分。
图1是本发明一实施例的电子装置的示意图。参考图1，电子装置100包括触控显示面板110、像素阵列120以及集成芯片(Integrated chip，IC)130。像素阵列120电性连接至集成芯片130。在本实施例中，触控显示面板110可例如包括玻璃基板以及触控面板，其中像素阵列120形成于触控显示面板110的主动区(Active area，AA)的所述玻璃基板上。集成芯片130形成于触控显示面板110的周边区(Peripheral area，PA)。在本实施例中，集成芯片130包括指纹感测电路131以及显示驱动电路132。值得注意的是，本实施例的触控显示面板110可为采用一种内嵌式(In-Cell)的指纹、触控及显示面板架构。集成芯片130可为一种指纹、触控及显示驱动集成(Fingerprint,Touch,Display Driver Integrated,FTDDI)芯片。
在本实施例中，集成芯片130可通过同一个接脚(Pin)电性连接至像素阵列120中的多个显示像素以及多个指纹感测像素，并且集成芯片130以分时方式驱动触控显示面板110的显示模块以及触控显示面板110。换言之，本实施例的集成芯片130可通过较少的接脚驱动触控显示面板110中的显示模块以及指纹感测模块，进而有效降低接脚及线路在电子装置100当中所占的空间。
在本实施例中，电子装置100例如是智能手机(smart phone)、平板计算机、游戏机或其他具有指纹识别功能的电子产品。触控显示面板110可例如包括有机发光二极管(Organic Light-Emitting Diode，OLED)显示面板，因此像素阵列120的多个像素单元的多个颜色子像素为多个有机发光二极管像素单元。详细而言，在本实施例中，像素阵列120的多个像素单元的可由多个第一颜色子像素、多个第二颜色子像素、多个第三颜色子像素以及多个指纹感测像素所组成。所述第一至第三颜色子像素可例如是红色颜色子像素、绿色颜色子像素以及蓝色颜色子像素，但本发明并不限于此。在一实施例中，像素阵 列120的多个像素单元可还包括多个第四颜色子像素，其中所述第四颜色子像素可例如是白色颜色子像素，但本发明亦不限于此。值得注意的是，在本实施例中，所述多个颜色子像素可形成于触控显示面板110的第一半导体层，并且所述多个指纹感测像素可形成于触控显示面板110的第二半导体层。
图2是本发明一实施例的部分像素阵列的电路示意图。参考图1以及图2，图2的像素单元120P为像素阵列120中的一个像素的配置结果。在本实施例中，像素单元120P包括一个第一颜色子像素121、一个第二颜色子像素122、一个第三颜色子像素123、一个第四颜色子像素124以及一个指纹感测像素125。第一颜色子像素121、第二颜色子像素122、第三颜色子像素123、第四颜色子像素124以及指纹感测像素125电性连接至栅极线G1。栅极线G2用于电性连接至下一列的像素单元，依此类推。第一颜色子像素121至第四颜色子像素124分别电性连接至显示数据线D1～D4。指纹感测像素125则电性连接至感测数据线D5。显示数据线D6用于电性连接至下一行的子像素，依此类推。
在本实施例中，栅极线G1可用于接收扫描信号而开启第一颜色子像素121、第二颜色子像素122、第三颜色子像素123、第四颜色子像素124以及指纹感测像素125。在本实施例中，显示数据线D1～D4用于传输由集成芯片130提供的多个显示驱动信号(显示数据)至第一颜色子像素121、第二颜色子像素122、第三颜色子像素123以及第四颜色子像素124，以使第一颜色子像素121、第二颜色子像素122、第三颜色子像素123以及第四颜色子像素124分别依据相应的显示驱动信号(显示数据)提供显示功能。在本实施例中，感测数据线D5用于传输指纹感测像素125的感测信号至集成芯片130，以使集成芯片130可依据感测信号生成对应的指纹感测影像。本发明的颜色子像素的排列顺序并不限于上述。并且，指纹感测像素125的摆放位置亦可设置在任两个颜色子像素之间。
图3是本发明一实施例的集成芯片与切换电路的电路示意图。参考图1至图3，集成芯片130包括指纹感测电路131以及显示驱动电路132。在本实施例中，指纹感测电路131以及显示驱动电路132经由同一个接脚N1(即形成共接脚)电性连接至开关晶体管T1～T5的一端，并且开关晶体管T1～T5的另一端电性连接至显示数据线D1～D4以及感测数据线D5。开关晶体管T1～T5 的控制端分别电性连接至解多路复用器(Demultiplexer，DMUX)141～145。在本实施例中，解多路复用器141～145以不同时序的切换信号至开关晶体管T1～T5，以在不同期间接收来自颜色子像素121～124或指纹感测像素125的信号。解多路复用器141～145可分别是由一个或多个晶体管或开关电路所组成，并且解多路复用器141～145可形成一个解多路复用器电路。
在本实施例中，显示数据线D1～D4以及感测数据线D5电性连接至像素阵列120的一个行像素组，其中行像素组可包括多个如上述图2实施例的像素单元120P依序沿着数据线排列。换言之，集成芯片130的指纹感测电路131以及显示驱动电路132经由同一个接脚N1来提供多个数据信号至电性连接至显示数据线D1～D4的所述一个行像素组中的多个颜色子像素，并且透过感测数据线D5接收行像素组中的多个指纹感测像素的感测结果。然而，在一实施例中，接脚N1还可电性连接至像素阵列120中的其他的多个行像素组，或者集成芯片130可经由类似于接脚N1的另外的多个接脚来电性连接至像素阵列120中的其他的多个行像素组。另外，关于本实施例的多个切换信号、多个显示驱动信号以及感测信号的时序将由以下图5实施例来详细说明之。
图4是本发明一实施例的集成芯片的内部功能电路示意图。参考图4，集成芯片130包括指纹感测电路131、显示驱动电路132以及控制电路133。在本实施例中，控制电路133经由第一切换电路电性连接在接脚N1以及指纹感测电路131之间，并且经由第二切换电路电性连接在接脚N1以及显示驱动电路132之间。控制电路用于交替地开启第一切换电路以及第二切换电路。在本实施例中，第一切换电路可为开关晶体管T6，并且第二切换电路可为开关晶体管T7，但本发明并不限于此。开关晶体管T6的一端电性连接至接脚N1，并且开关晶体管T7的一端电性连接至接脚N1以及开关晶体管T6的一端。开关晶体管T6以及开关晶体管T7的控制端电性连接至控制电路133。控制电路133可输出两个切换信号S1、S2至开关晶体管T6以及开关晶体管T7，以控制开关晶体管T6以及开关晶体管T7。
在本实施例中，指纹感测电路131包括放大器131_1、模拟至数字转换器131_2以及数字处理器131_3。放大器131_1的输入端电性连接至开关晶体管T6的另一端。模拟至数字转换器131_2的输入端电性连接至放大器 131_1的输出端。数字处理器131_3电性连接至模拟至数字转换器131_2的输出端。在本实施例中，显示驱动电路132包括源极放大器132_1以及时序控制电路132_2。源极放大器132_1的输入端电性连接至时序控制电路132_2，并且源极放大器132_1的输出端电性连接至开关晶体管T7的另一端。在本实施例中，接脚N1在相对于接脚N1的一侧电性连接至开关晶体管T1～T5。开关晶体管T1～T5电性连接至显示数据线D1～D4以及感测数据线D5。
在本实施例中，放大器131_1可接收感测信号，并将信号放大后的感测信号FS提供至模拟至数字转换器131_2。模拟至数字转换器131_2可将指纹感测结果的数字信号提供至数字处理器131_3，以使数字处理器131_3可依据模拟至数字转换器131_2提供的数字信号来产生指纹感测信息，例如生成指纹感测影像。在本实施例中，显示驱动电路132的时序控制电路132_2可提供时序控制信号至源极放大器132_1，以使源极放大器132_1依据设计的显示时序来输出显示驱动信号DS。
图5是本发明一实施例的用于操作集成芯片的多个信号的信号时序图。参考图2至图5，时间t0至时间t6为像素单元120P的驱动期间(或称一个行像素组的驱动期间)，其中此驱动期间包括显示驱动期间以及指纹感测期间，且显示驱动期间与指纹感测期间未重叠，例如，显示驱动期间为时间t0至时间t5。指纹感测期间为时间t5至时间t6。在一实施例中，像素单元120P的颜色子像素121～124以及指纹感测像素125经由栅极线G1接收扫描信号GS1，而在时间t0至时间t5被开启。在本实施例中，开关晶体管T7接收切换信号S1，并且开关晶体管T6接收切换信号S2。开关晶体管T1～T5分别接收由解多路复用器141～145分别提供的切换信号M_1～M_5。
在本实施例中，开关晶体管T6在显示驱动期间(时间t0至时间t5)为关闭，并且开关晶体管T7在显示驱动期间(时间t0至时间t5)为开启。在显示驱动期间中，显示驱动期间包括四个子显示驱动期间，其中四个子显示驱动期间分别为时间t1至时间t2、时间t2至时间t3、时间t3至时间t4以及时间t4至时间t5。开关晶体管T1～T4分别在四个子显示驱动期间接收切换信号M_1～M_4而在不同期间开启，并且开关晶体管T5为关闭。切换信号M_1～M_4的信号波形在时间上彼此未重叠。因此，在四个子显示驱动期间中，显示驱动电路132经由接脚N1在不同期间分别输出第一至第四显示驱动信号(如图5所示 的显示驱动信号DS在四个子显示驱动期间的方波波形)至显示数据线D1～D4。
对此，在显示驱动期间中，显示驱动电路132可经由显示数据线D1～D4输出显示驱动信号DS至颜色子像素121～124，使像素单元120P进行显示功能。然而，需注意的是，图5的显示驱动信号DS仅表示信号波形的时序关系，而非真实信号波形。对此，显示驱动信号DS的显示数据的电压高低或电位高低可由不同显示效果或个别的子像素类型来决定，而本发明并不加以限制。
在本实施例中，开关晶体管T5在指纹感测期间(时间t5至时间t6)为开启，并且开关晶体管T6在指纹感测期间(时间t5至时间t6)为关闭。在指纹感测期间中，开关晶体管T1～T4为关闭，并且开关晶体管T5为开启。切换信号M_5的信号波形未与切换信号M_1～M_4的信号波形重叠。因此，指纹感测电路131可经由感测数据线D5从指纹感测像素125接收感测信号FS，而使像素单元120P进行指纹感测功能。然而，需注意的是，图5的感测信号FS仅表示信号波形的时序关系，而非真实信号波形。对此，感测信号FS的感测数据的电压高低或电位高低可由不同感测结果来决定。
综上所述，本发明的电子装置为实施一种内嵌式(In-Cell)的指纹、触控及显示面板架构，并且使用指纹、触控及显示驱动集成芯片来驱动内嵌有多个指纹感测像素的触控显示面板。因此，本发明的电子装置可在面板的周边区节省驱动电路在面板的周边区中所占的空间。或者，本发明的集成芯片可经由同一个接脚来传输显示驱动信号以及感测信号，而可有效节省接脚及线路在面板的周边区中所占的空间。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (12)

  1. 一种电子装置，其特征在于，包括：
    触控显示面板，包括像素阵列；以及
    集成芯片，电性连接至所述像素阵列，并且包括指纹感测电路以及显示驱动电路，
    其中所述指纹感测电路以及所述显示驱动电路经由同一个接脚电性连接至多个显示数据线以及感测数据线，
    其中所述多个显示数据线电性连接至所述像素阵列的多个颜色子像素，并且所述感测数据线分别电性连接至所述像素阵列的多个指纹感测像素，其中所述多个颜色子像素为多个有机发光二极管像素。
  2. 根据权利要求1所述的电子装置，其特征在于，所述接脚经由多个晶体管电性连接至所述多个显示数据线，并且所述接脚经由另一晶体管电性连接至所述感测数据线。
  3. 根据权利要求2所述的电子装置，其特征在于，所述多个晶体管的控制端分别接收多个切换信号，并且所述多个切换信号的信号波形在时间上未重叠。
  4. 根据权利要求1所述的电子装置，其特征在于，所述显示驱动电路在显示驱动期间中经由所述接脚输出多个显示驱动信号，以驱动所述多个颜色子像素，并且所述指纹感测电路在指纹感测期间中经由所述接脚接收所述多个指纹感测像素的感测信号，其中所述显示驱动期间与所述指纹感测期间未重叠。
  5. 根据权利要求4所述的电子装置，其特征在于，所述显示驱动期间包括多个子显示驱动期间，并且在所述多个子显示驱动期间中，所述显示驱动电路经由所述接脚在不同时间分别输出所述多个显示驱动信号至所述多个显示数据线。
  6. 根据权利要求1所述的电子装置，其特征在于，所述集成芯片还包括：
    第一切换电路，具有一端电性连接至所述接脚，并且具有另一端电性连接至所述指纹感测电路；
    第二切换电路，具有一端电性连接至所述接脚，并且具有另一端电性连接至所述显示驱动电路；以及
    控制电路，电性连接至所述第一切换电路以及第二切换电路，其中所述控制电路交替地开启所述第一切换电路以及所述第二切换电路。
  7. 根据权利要求6所述的电子装置，其特征在于，所述指纹感测电路包括：
    放大器，具有输入端电性连接至所述第一切换电路的所述另一端；
    模拟至数字转换器，具有输入端电性连接至所述放大器的输出端；以及
    数字处理器，电性连接至所述模拟至数字转换器的输出端。
  8. 根据权利要求6所述的电子装置，其特征在于，所述显示驱动电路包括：
    时序控制电路；以及
    源极放大器，具有输入端电性连接至所述时序控制电路，并且具有输出端电性连接至所述第二切换电路的所述另一端。
  9. 根据权利要求1所述的电子装置，其特征在于，所述多个颜色子像素形成于所述触控显示面板的第一半导体层，并且所述多个指纹感测像素形成于所述触控显示面板的第二半导体层。
  10. 根据权利要求1所述的电子装置，其特征在于，所述多个颜色子像素包括至少一红色子像素、至少一绿色子像素以及至少一蓝色子像素。
  11. 根据权利要求1所述的电子装置，其特征在于，所述多个颜色子像素包括至少一红色子像素、至少一绿色子像素、至少一蓝色子像素以及至少一白色子像素。
  12. 根据权利要求1所述的电子装置，其特征在于，所述集成芯片还包括触控驱动电路。
PCT/CN2020/123152 2020-04-29 2020-10-23 具有指纹感测功能的电子装置 WO2021218071A1 (zh)

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