WO2022067516A1 - 指纹识别基板及其驱动方法和显示装置 - Google Patents

指纹识别基板及其驱动方法和显示装置 Download PDF

Info

Publication number
WO2022067516A1
WO2022067516A1 PCT/CN2020/118871 CN2020118871W WO2022067516A1 WO 2022067516 A1 WO2022067516 A1 WO 2022067516A1 CN 2020118871 W CN2020118871 W CN 2020118871W WO 2022067516 A1 WO2022067516 A1 WO 2022067516A1
Authority
WO
WIPO (PCT)
Prior art keywords
fingerprint identification
signal
group
signal transmission
groups
Prior art date
Application number
PCT/CN2020/118871
Other languages
English (en)
French (fr)
Inventor
刘屹
王世君
穆文凯
冯博
杨心澜
王洋
魏旃
丁腾飞
樊君
徐成福
Original Assignee
京东方科技集团股份有限公司
北京京东方显示技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司, 北京京东方显示技术有限公司 filed Critical 京东方科技集团股份有限公司
Priority to CN202080002204.2A priority Critical patent/CN114787758A/zh
Priority to PCT/CN2020/118871 priority patent/WO2022067516A1/zh
Priority to US17/419,909 priority patent/US11810389B2/en
Publication of WO2022067516A1 publication Critical patent/WO2022067516A1/zh

Links

Images

Classifications

    • 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
    • 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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • 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
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • 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
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to a fingerprint identification substrate, a driving method thereof, and a display device.
  • the fingerprint identification unit is the smallest unit in the fingerprint identification device.
  • the fingerprint identification unit transmits the acquired fingerprint signal to the signal receiving unit (for example, fingerprint identification IC) through the signal reading line, so that the signal receiving unit can identify the fingerprint according to the fingerprint signal.
  • the signal receiving unit for example, fingerprint identification IC
  • the conventional setting method is that one column of fingerprint identification units corresponds to one signal reading line, one signal reading line is connected to one signal transmission channel (Channel) in the signal receiving unit, and the signal reading line corresponds to the signal transmission channel one-to-one.
  • the present disclosure proposes a fingerprint identification substrate, a driving method thereof, and a display device.
  • an embodiment of the present disclosure provides a fingerprint identification substrate, comprising: a plurality of fingerprint identification units arranged in an array, a plurality of signal reading line groups and a plurality of gate circuits, a plurality of the fingerprint identification units Divided into a plurality of first fingerprint identification groups arranged in the row direction, the first fingerprint identification group corresponds to the signal reading line group one-to-one, and the signal reading line group and the gating circuit one-to-one correspond;
  • the first fingerprint identification group includes: continuous multiple columns of the fingerprint identification units arranged in the row direction, and the signal reading line group includes: a plurality of columns of the fingerprint identification units in the corresponding first fingerprint identification group.
  • a plurality of signal reading lines corresponding to the units one-to-one, and the signal reading lines are connected with a corresponding column of the fingerprint identification units;
  • the gating circuit includes: a plurality of switch circuits corresponding to a plurality of the signal read lines in the corresponding signal read line group, and each of the signal read lines passes through the corresponding signal read lines.
  • the switch circuit is connected to a signal transmission channel on the signal receiving unit, and the switch circuit is used to control the on-off between the signal reading line connected thereto and the signal transmission channel;
  • different signal readout lines in the same signal readout line group are connected to different signal transmission channels, and there are at least two signal readout lines in different signal readout line groups The signal reading lines are connected to the same signal transmission channel.
  • the signal transmission channels on the signal receiving unit are divided into at least two signal transmission channel groups, each of the signal reading line groups corresponds to one of the signal transmission channel groups, and the signal transmission The number of the signal transmission channels in the channel group is greater than the number of the signal readout lines in the corresponding signal readout line group.
  • the number of columns of the fingerprint identification units in each of the first fingerprint identification groups is the same;
  • the number of the signal readout lines in each signal readout line group is the same.
  • a plurality of the signal readout line groups are sequentially arranged in the row direction, and the at least two signal transmission channel groups include: a first signal transmission channel group and a second signal transmission channel group;
  • the signal readout line group located in the odd-numbered order corresponds to the first signal transmission channel group
  • the signal readout line group located in the even order corresponds to the second signal transmission channel group.
  • all the signal readout lines in each of the signal readout line groups are sequentially arranged in a row direction;
  • the signal readout lines with the same order are connected to the same signal transmission channel in the first signal transmission channel group;
  • the signal readout lines with the same order are connected to the same signal transmission channel in the second signal transmission channel group.
  • the number of signal transmission channels in each of the signal transmission channel groups is the same.
  • the switch circuits located in the same gating circuit are connected to the same control signal line, and the switch circuits located in different gating circuits are connected to different control signal lines;
  • the switch circuits located in the same gating circuit are configured to be turned on or off simultaneously under the control of the control signal provided by the same control signal line.
  • the switch circuit includes: a switch transistor
  • the control pole of the switch transistor is connected to the corresponding control signal line, the first pole of the switch transistor is connected to the corresponding signal reading line, and the second pole of the switch transistor is connected to the corresponding signal Transmission channel connection.
  • a plurality of the fingerprint identification units are divided into a plurality of second fingerprint identification groups arranged in a column direction
  • the fingerprint identification substrate further includes: a plurality of gate driving circuits and a plurality of scanning driving line groups , the second fingerprint identification group has a one-to-one correspondence with the scan drive line group, and the scan drive line group has a one-to-one correspondence with the gate drive circuit;
  • the second fingerprint identification group includes: a plurality of consecutive rows of the fingerprint identification units arranged in the column direction, and the scan drive line group includes: a plurality of rows of the fingerprint identification units in the corresponding second fingerprint identification group; One-to-one corresponding multiple scan drive lines, the scan drive lines are connected to a corresponding row of the fingerprint identification units;
  • the gate drive circuit includes: a plurality of cascaded shift registers corresponding to a plurality of scan drive lines in the corresponding scan drive line group one-to-one, and the signal output end of the shift register corresponds to the corresponding scan drive line. drive line connection.
  • all the scan drive line groups are sequentially arranged in the column direction
  • the gate drive circuits connected to the scan drive line groups located at odd-numbered positions are located on the first side of the corresponding scan drive line groups, and the gate drive circuits connected to the scan drive line groups located at even-numbered positions are located on the first side of the corresponding scan drive line groups.
  • the gate driving circuit is located on the second side of the corresponding scan driving line group, and the first side and the second side are opposite sides of the scan driving line group in the row direction.
  • the number of rows of the fingerprint identification units in each of the second fingerprint identification groups is the same;
  • the number of the scan driving lines in each scan driving line group is the same.
  • an embodiment of the present disclosure further provides a display device, including: the fingerprint recognition substrate provided in the first aspect above.
  • an embodiment of the present disclosure further provides a fingerprint recognition driving method, the driving method is based on a fingerprint recognition substrate, and the fingerprint recognition substrate adopts the fingerprint recognition substrate provided in the first aspect, each of the first The fingerprint identification group has a corresponding fingerprint identification area, and the driving method includes:
  • All switch circuits in the gating circuit corresponding to the first fingerprint identification group where the fingerprint identification area overlaps with the fingerprint area are turned on, and the switch circuit in the on state switches the signal reading line connected to the switch circuit.
  • the detection signal transmits the corresponding signal transmission channel.
  • all the fingerprint identification units are divided into a plurality of second fingerprint identification groups arranged in a column direction
  • the fingerprint identification substrate further includes: a plurality of gate driving circuits and a plurality of scanning driving line groups
  • the driving method further includes:
  • All of the gate drive circuits start scan driving in synchronization.
  • FIG. 1 is a schematic diagram of a circuit structure of a fingerprint identification substrate provided by an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of a circuit structure of a fingerprint identification unit in an embodiment of the disclosure
  • FIG. 3 is a schematic diagram of the circuit structure of a first fingerprint identification group and its corresponding signal reading line group and gating circuit in the embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of the circuit structure of a second fingerprint identification group and its corresponding scan drive line group and gate drive circuit according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of another circuit structure of the fingerprint identification substrate provided by the embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of a circuit structure of a fingerprint identification block in an embodiment of the present disclosure
  • FIG. 7 is a flowchart of another fingerprint recognition driving method provided by an embodiment of the present disclosure.
  • FIG. 1 is a schematic diagram of a circuit structure of a fingerprint identification substrate provided in an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of a circuit structure of a fingerprint identification unit in an embodiment of the disclosure
  • FIG. 3 is a first fingerprint identification in an embodiment of the disclosure
  • Figure 4 is a schematic diagram of the circuit structure of a second fingerprint identification group and its corresponding scanning driving line group and gate driving circuit in the embodiment of the disclosure . As shown in FIG. 1 to FIG.
  • the fingerprint identification substrate includes: a plurality of fingerprint identification units 1 arranged in an array, a plurality of signal reading line groups 6 and a plurality of gate circuits MUX_1 to MUX_n, a plurality of fingerprint identification units 1 is divided into a plurality of first fingerprint identification groups 2 arranged in the row direction, the first fingerprint identification group 2 is in one-to-one correspondence with the signal reading line group 6, and the signal reading line group 6 is one-to-one with the gating circuits MUX_1 ⁇ MUX_n correspond.
  • the first fingerprint identification group 2 includes: continuous multiple columns of fingerprint identification units 1 arranged in the row direction, and the signal reading line group 6 includes: one-to-one correspondence with the multiple columns of fingerprint identification units 1 in the corresponding first fingerprint identification group 2.
  • a plurality of signal reading lines RL are connected to a corresponding row of fingerprint identification units 1 .
  • the gate circuits MUX_1 to MUX_n include: a plurality of switch circuits T_1 to T_b corresponding to the plurality of signal read lines RL in the corresponding signal read line group 6 one-to-one, and each signal read line RL passes through a corresponding switch
  • the circuits T1-Tb are connected to a signal transmission channel channel_1-channel_2b on the signal receiving unit 5, and the switch circuits T_1-T_b are used to control the on-off between the connected signal read line RL and the signal transmission channel channel_1-channel_2b.
  • the signal receiving unit 5 may specifically be a fingerprint identification IC.
  • connection between the signal reading line RL and the corresponding signal transmission channel specifically means that the signal reading line RL is electrically connected to the corresponding signal transmission channel through the configured switch circuits T_1 to T_b , does not mean that the signal reading line RL is directly connected to the corresponding signal transmission channel.
  • the fingerprint identification unit 1 is the smallest unit in the fingerprint identification process, and can be used to identify the situation of the valley and ridge on the part of the fingerprint facing the fingerprint identification unit 1 .
  • the fingerprint identification unit 1 is an optical fingerprint identification unit, including: a transistor M and a photodiode P, the control electrode of the transistor M is connected to the scanning drive line Gate of the corresponding row, The first pole of the transistor M is connected to the photodiode P, the second pole of the transistor M is connected to the signal reading line RL of the corresponding column, and the photodiode P has a PIN structure, which can generate a photoelectric effect.
  • the currents read by the read signal lines at the positions of the ridges and the valleys are different, so as to realize the difference between the valleys and ridges of the fingerprint. detection.
  • the fingerprint identification unit 1 shown in FIG. 2 only serves as an example, and does not limit the technical solutions of the present disclosure; in the embodiment of the present disclosure, the fingerprint identification unit 1 includes but is not limited to Optical fingerprint identification unit, ultrasonic fingerprint identification unit, capacitive fingerprint identification unit, the specific structure of the fingerprint identification unit is not limited by the technical solutions of the present disclosure.
  • the fingerprint identification unit 1 and the signal reading line RL in the row direction, and setting the switch circuits T_1 to T_b between the signal reading line RL and the corresponding signal transmission channel, so that the The signal reading lines RL located in different signal reading lines RL can share the signal transmission channel, so that the number of signal transmission channels required to be configured in the fingerprint identification unit 1 array is reduced, and the number of signal transmission channels on the signal receiving unit 5 is required. reduce.
  • the length of the fingerprint identification area corresponding to the first fingerprint identification group 2 in the column direction since the length of columns of the fingerprint identification units 1 included in each first fingerprint identification group 2 is controlled by controlling , the length of the fingerprint identification area corresponding to the first fingerprint identification group 2 in the row direction can be controlled, so as to realize the control of the area of the fingerprint identification area corresponding to the first fingerprint identification group 2 .
  • the length in the row direction of the fingerprint identification area corresponding to each first fingerprint identification group 2 is slightly larger than the length of a complete fingerprint (which can be obtained through empirical data).
  • the number of columns of the fingerprint identification units 1 included in each first fingerprint identification group 2 can be designed separately, and the fingerprint identification units included in each first fingerprint identification group 2
  • the number of columns of 1 can be the same or different.
  • FIG. 5 is a schematic diagram of another circuit structure of the fingerprint identification substrate provided by the embodiment of the present disclosure. As shown in FIG. 5 , as an optional embodiment, the number of columns of fingerprint identification units 1 in each first fingerprint identification group 2 is the same, and the number of signal reading lines RL in each signal reading line group 6 is the same, All signal readout line groups 6 correspond to the same plurality of signal transmission channels.
  • a plurality of fingerprint identification units 1 are grouped along the row direction to obtain n first fingerprint identification groups 2, and the number of signal reading line groups 6 and gate circuits MUX_1 to MUX_n is n.
  • the first fingerprint identification group 2 includes b columns of fingerprint identification units 1, each signal read line group 6 includes b signal read lines RL, and each gate circuit MUX_1 to MUX_n includes b switch circuits T_1 to T_b,n
  • the signal readout line groups 6 correspond to b signal transmission channels channel_1 to channel_b. It can be seen that, for n*b signal read lines RL, only b signal transmission channels channel_1 to channel_b need to be configured. At this time, each signal transmission channel channel_1 to channel_b is connected to n signal read lines RL.
  • the signal transmission channels on the signal receiving unit 5 are divided into at least two signal transmission channel groups, each signal reading line group 6 corresponds to a signal transmission channel group, and the number of signal transmission channels in the signal transmission channel group It is greater than the number of the signal reading lines RL in the corresponding signal reading line group 6 .
  • the number of signal transmission channels in each signal transmission channel group is the same.
  • the signal transmission channels on the signal receiving unit 5 can be grouped, and the signal reading line group 6 can be corresponding to the signal transmission channel group, so as to facilitate the management and control of the signal transmission channel pair.
  • the number of signal transmission channels in each signal transmission channel group may be the same or different, and it is only necessary to ensure that the number of signal transmission channels in the signal transmission channel group is greater than that of each corresponding signal reading line group 6
  • each signal transmission channel group may correspond to 0, 1, 2 or more signal readout line groups 6.
  • a plurality of signal readout line groups 6 are sequentially arranged in the row direction, and at least two signal transmission channel groups include: a first signal transmission channel group and a second signal transmission channel group;
  • the signal readout line group 6 corresponds to the first signal transmission channel group;
  • the signal readout line group 6 located in the even-numbered order corresponds to the second signal transmission channel group.
  • the first signal transmission channel group includes b signal transmission channels channel_1 to channel_b
  • the second signal transmission channel group includes b signal transmission channels channel_b+1 to channel_2b.
  • Each first fingerprint identification group 2 includes 54 columns of fingerprint identification units 1, each signal read line group 6 includes 54 signal read lines RL, and each gate circuit MUX_1 to MUX_n includes 54 switch circuits T_1 to T_b;
  • the signal receiving unit 5 has 108 signal transmission channels, which are respectively recorded as: channel_1 ⁇ channel_108, channel_1 ⁇ channel_54 are used as the first signal transmission channel group, and channel_55 ⁇ channel_108 are used as the second signal transmission channel group (that is, the value of b above is 54).
  • the 54 signal read lines RL located in the odd-numbered signal readout line group 6 correspond to the 54 signal transmission channels in the first signal transmission channel group, and the 54 signal readout lines located in the even-ordered signal readout line group 6
  • the read line RL corresponds to the 54 signal transmission channels in the second signal transmission channel group.
  • all the signal reading lines RL in each signal reading line group 6 are sequentially arranged in the row direction; in all the signal reading line groups 6 located in odd order, the signal reading lines with the same order The line RL is connected with the same signal transmission channel in the first signal transmission channel group; in all the signal readout line groups 6 located in the even order, the signal readout line RL with the same order is connected with the second signal transmission channel group connected within the same signal transmission channel.
  • the i-th signal readout line RL is connected to the i-th signal transmission channel in the first signal transmission channel group. Specifically, Ground, for the signal readout line group 6 located in the odd-numbered order, the i-th signal readout line RL is connected to the signal transmission channel channel_i. In each signal read line group 6 located in the even order, the i-th signal read line RL is connected to the i-th signal transmission channel in the second signal transmission channel group. Specifically, for the signal read line located in the even order The line fetching group 6, in which the i-th signal reading line RL is connected to the signal transmission channel channel_i+54. where i is an integer and 1 ⁇ i ⁇ 54.
  • the switch circuits T_1 ⁇ T_b located in the same gating circuit MUX_1 ⁇ MUX_n are connected to the same control signal line mux_1 ⁇ mux_n, and the switching circuits T_1 ⁇ T_b located in different gating circuits MUX_1 ⁇ MUX_n are connected to different control signal lines mux_1 ⁇ mux_n; the switch circuits T_1 ⁇ T_b located in the same gating circuit MUX_1 ⁇ MUX_n are configured to be turned on or off simultaneously under the control of the control signal provided by the same control signal line mux_1 ⁇ mux_n. This setting can effectively reduce the number of control signal lines, save wiring space, and facilitate narrow borders.
  • the switch circuits T_1 to T_b include: switch transistors; the control electrodes of the switch transistors are connected to the corresponding control signal lines mux_1 to mux_n, and the first electrodes of the switch transistors are connected to the corresponding control signal lines mux_1 to mux_n.
  • the signal reading line RL is connected, and the second pole of the switching transistor is connected with the corresponding signal transmission channel.
  • the switching transistors located in the same gating circuit MUX_1 ⁇ MUX_n can be simultaneously turned on or off under the control of a corresponding control signal line.
  • the gating circuits MUX_1 ⁇ MUX_n corresponding to the different gating circuits MUX_1 ⁇ MUX_n of the same signal transmission channel group is in a conducting state at any time (the gating circuit MUX_1 ⁇ MUX_n
  • the switch circuits T_1 ⁇ T_b in the circuits MUX_1 ⁇ MUX_n are simultaneously turned on), so as to transmit the signal on each signal reading line RL in the corresponding signal reading line group 6 to the signal receiving unit 5 .
  • the different strobe circuits MUX_1 to MUX_n corresponding to the same signal transmission channel group can be turned on in sequence at different times, so as to transmit the signals on the signal reading lines RL in the different signal reading line groups 6 to the signal receiving unit in turn 5. Based on the above technical means, time-division multiplexing of the signal transmission channel can be realized.
  • the fingerprint recognition driving and the screen display driving are staggered, that is, during the fingerprint recognition driving process, the screen display driving is suspended. Therefore, in order to ensure that the fingerprint recognition driving time is not too long and affects the display product For the overall display effect, the time required to complete a complete fingerprint identification is less than the refresh time of one frame of display image.
  • the scanning driving time t corresponding to a row of fingerprint identification units 1 (referred to as row scanning driving) is fixed, the time required to complete a complete fingerprint identification is determined by the number of row scanning driving; in the related art, generally Each row of fingerprint identification units 1 on the fingerprint identification substrate is sequentially scanned and driven.
  • the time required to complete a complete fingerprint identification increases, and it is extremely easy to exceed one frame of display. The refresh time of the image, resulting in a poor display.
  • the plurality of fingerprint identification units 1 are divided into a plurality of second fingerprint identification groups 3 arranged in the column direction
  • the fingerprint identification substrate further includes: a plurality of gate driving circuits GOA1-GOAm and The plurality of scanning driving line groups 7 and the second fingerprint identification group 3 are in one-to-one correspondence with the scanning driving line groups 7, and the scanning driving line groups 7 are in one-to-one correspondence with the gate driving circuits GOA1-GOAm.
  • the second fingerprint identification group 3 includes: continuous multiple rows of fingerprint identification units 1 arranged in the column direction, and the scanning drive line group 7 includes: a one-to-one correspondence with the multiple rows of fingerprint identification units 1 in the corresponding second fingerprint identification group 3
  • a scanning driving line Gate is provided, and the scanning driving line Gate is connected with a corresponding row of fingerprint identification units 1 .
  • the gate driving circuits GOA1-GOAm include: a plurality of cascaded shift registers SR1-SRa corresponding to the plurality of scanning driving lines Gate in the corresponding scanning driving line group 7 one-to-one, and the signal outputs of the shift registers SR1-SRa The terminal is connected to the corresponding scan driving line Gate.
  • the specific circuit structures of the shift registers SR1 to SRa are not limited, and the circuit structures of any existing shift registers may be adopted.
  • the shift register SR in the first stage is connected to a corresponding one of the scanning driving start signal terminals STV1 ⁇ STVm.
  • the scanning driving start signal terminals STV1 ⁇ STVm provide valid signals
  • the corresponding gate driving circuits GOA1 ⁇ GOAm start to perform progressive scanning driving.
  • the specific working process of the gate driving circuit belongs to the conventional technology in the art, and will not be repeated here.
  • the length of the fingerprint identification area corresponding to the second fingerprint identification group 3 in the row direction has been determined, by controlling the number of rows of the fingerprint identification units 1 included in each second fingerprint identification group 3, That is, the length of the fingerprint identification area corresponding to the second fingerprint identification group 3 in the column direction can be controlled, so as to realize the control of the area of the fingerprint identification area corresponding to the second fingerprint identification group 3 .
  • the length in the column direction of the fingerprint recognition area corresponding to each second fingerprint recognition group 3 is slightly larger than the length of a complete fingerprint.
  • the number of rows of the fingerprint identification units 1 included in each second fingerprint identification group 3 can be designed separately, and the number of rows of the fingerprint identification units 1 included in each second fingerprint identification group 3 can be designed separately.
  • the number of rows of fingerprint identification units 1 included may be the same or different.
  • the number of rows of fingerprint identification units 1 in each second fingerprint identification group 3 is the same, and the number of scan drive lines Gate in each scan drive line group 7 is the same .
  • each second fingerprint identification group 3 corresponds to one scanning driving line group 7 and one gate driving circuit, therefore Each second fingerprint identification group 3 can be individually scanned and driven.
  • only the second fingerprint identification group 3 in which the fingerprint identification area overlaps with the fingerprint area may be scanned and driven.
  • all gate driving circuits GOA1 to GOAm can also be controlled. The synchronization starts to scan the drive. It should be noted that, in the process that the plurality of gate driving circuits GOA1 to GOAm start scanning and driving synchronously, the length in the column direction of the fingerprint identification area corresponding to the second fingerprint identification group 3 is slightly larger than that of a complete fingerprint.
  • a plurality of scan driving line groups 7 are sequentially arranged in the column direction; the gate driving circuits GOA1, GOA3 . . On the first side, the gate drive circuits GOA2, GOA3 . Group 7 is on opposite sides in the row direction.
  • the gate driving circuits GOA1-GOAm are uniformly arranged on opposite sides of the design fingerprint identification substrate in the row direction, so that the space occupied by each gate driving circuit GOA1-GOAm can be increased, which is convenient for layout design.
  • FIG. 6 is a schematic diagram of a circuit structure of a fingerprint identification block in an embodiment of the present disclosure.
  • the first fingerprint identification group 2 after dividing the plurality of fingerprint identification units 1 into the first fingerprint identification group 2 along the row direction and the first fingerprint identification group 2 along the column direction, it is possible to obtain the first fingerprint identification group 2 arranged in an array.
  • the number of the first fingerprint identification group 2 and the gating circuits MUX_1 to MUX_n is n
  • each of the first fingerprint identification group 2 includes the fingerprint identification unit 1 of column b
  • the number of the second fingerprint identification group 3 is m.
  • each first fingerprint identification group 2 includes a row of fingerprint identification units 1, and at this time, m*n fingerprint identification blocks 4 can be obtained, and each fingerprint identification block 4 includes a row a, column b, a total of a*b fingerprint identification units 1.
  • Each of the gating circuits MUX_1 to MUX_n includes b switching circuits; the values of a and b can be set according to actual conditions. In practical applications, when the values of a and b are set, the fingerprint identification area corresponding to one fingerprint identification block 4 can completely accommodate a complete fingerprint (the parameters of the complete fingerprint can be obtained through empirical data).
  • An embodiment of the present disclosure also provides a fingerprint recognition driving method, the fingerprint recognition driving method is based on the fingerprint recognition substrate provided in the previous embodiment, and the fingerprint recognition driving method includes:
  • Step S1 all switch circuits in the gate circuit corresponding to the first fingerprint identification group where the fingerprint identification area and the fingerprint area overlap are turned on, and the switch circuit in the on state transmits the detection signal in the connected signal reading line Corresponding signal transmission channel.
  • any two first fingerprint identification groups in the two or more first fingerprint identification groups correspond to different
  • all switch circuits in the gating circuits corresponding to the two or more first fingerprint identification groups can be turned on at the same time.
  • first fingerprint identification groups There are two or more first fingerprint identification groups that overlap the fingerprint identification area and the fingerprint area, and there are two or more first fingerprint identification groups corresponding to the two or more first fingerprint identification groups.
  • multiple gating circuits connected to two or more first fingerprint identification groups corresponding to the same transmission channel group need to be turned on in sequence in each row scanning driving stage.
  • FIG. 7 is a flowchart of another fingerprint recognition driving method provided by an embodiment of the present disclosure.
  • the fingerprint recognition driving method is based on the fingerprint recognition substrate provided in the previous embodiment, wherein the fingerprint recognizes multiple fingerprints on the substrate
  • the identification unit is divided into a plurality of second fingerprint identification groups arranged along the column direction, the second fingerprint identification groups are in one-to-one correspondence with the scanning driving line groups, and the scanning driving line groups are in one-to-one correspondence with the gate driving circuits.
  • the fingerprint identification driving method include:
  • Step S1 all switch circuits in the gate circuit corresponding to the first fingerprint identification group where the fingerprint identification area and the fingerprint area overlap are turned on, and the switch circuit in the on state transmits the detection signal in the connected signal reading line Corresponding signal transmission channel.
  • Step S2 all gate driving circuits start to perform scan driving synchronously.
  • step S1 and step S2 are performed synchronously.
  • the fingerprint area is positioned in advance (implemented by the touch function module in the display product) to determine the existence of the fingerprint recognition area and the fingerprint area.
  • all gate drive circuits start to scan and drive synchronously. Turn on at the same time or turn on sequentially (if there are multiple gating circuits determined and there are at least two gating circuits corresponding to the same transmission channel group, then at least two gating circuits in the same transmission channel group need to be turned on in sequence) .
  • the second fingerprint identification group and the corresponding gate driving circuit in which the fingerprint identification area and the fingerprint area overlap may also be determined.
  • the gate driving circuit determined in advance it is only necessary to control the gate driving circuit determined in advance to perform scanning driving (when there are two or more gate driving circuits determined, the two or more gate driving circuits determined
  • the gate driving circuits can perform scan driving synchronously or sequentially), while other gate driving circuits do not perform scan driving.
  • An embodiment of the present disclosure further provides a display device, including: a fingerprint identification substrate, and the fingerprint identification substrate adopts the fingerprint identification substrate provided in any of the above embodiments.
  • the display device further includes: a display function module, the display function module may be a liquid crystal display function module or an organic light-emitting display function module, and the display function module may be on the same substrate as the fingerprint recognition substrate, or may be on a different substrate .
  • the display device may further include a touch function module. The specific structures of the display function module and the touch function module and their integration with the fingerprint identification substrate belong to the conventional technical content in the art, and will not be repeated here.
  • the display device provided by the embodiments of the present disclosure may be a computer, a television, a vehicle-mounted display device, or other structures or devices with a display function, which are not specifically limited in the present invention.
  • the display device provided by the embodiment of the present invention has the beneficial effects of the fingerprint recognition substrate provided by the embodiment of the present invention. For details, reference may be made to the specific description of the fingerprint recognition substrate in the above-mentioned embodiments, which will not be repeated in this embodiment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Image Input (AREA)

Abstract

一种指纹识别基板，包括：呈阵列排布的多个指纹识别单元（1）、多个信号读取线组（6）和多个选通电路（MUX_1～MUX_n），多个指纹识别单元（1）划分为沿行方向排布的多个第一指纹识别组（2），第一指纹识别组（2）、信号读取线组（6）和选通电路（MUX_1～MUX_n）中任意两者均一一对应；第一指纹识别组（2）包括：在行方向排布的连续多列指纹识别单元（1），信号读取线组（6）包括：多条信号读取线（RL），信号读取线（RL）与对应的一列指纹识别单元（1）连接；选通电路（MUX_1～MUX_n）包括：多个开关电路（T_1～T_b），每条信号读取线（RL）均通过对应的开关电路（T_1～T_b）与信号接收单元（5）上的一个信号传输通道（channel_1～channel_2b）连接；在全部信号读取线（RL）中，位于同一信号读取线组（6）中的不同信号读取线（RL）连接不同信号传输通道（channel_1～channel_2b），且存在位于不同信号读取线组（6）中的至少两条信号读取线（RL）连接同一信号传输通道（channel_1～channel_2b）。

Description

指纹识别基板及其驱动方法和显示装置 技术领域
本公开涉及显示技术领域，特别涉及一种指纹识别基板及其驱动方法和显示装置。
背景技术
指纹识别技术被广泛应用于保护个人信息安全的各种领域，尤其是显示技术领域，例如手机、笔记本电脑、平板的电脑、数码相机等。指纹识别单元是指纹识别器件中的最小单元，指纹识别单元将获取到的指纹信号通过信号读取线传递至信号接收单元(例如，指纹识别IC)，以供信号接收单元根据指纹信号识别出指纹的谷脊。目前，常规设置方式是一列指纹识别单元对应一条信号读取线，一条信号读取线与信号接收单元中的一个信号传输通道(Channel)连接，且信号读取线与信号传输通道一一对应。
然而，随着指纹识别应用场景的增多，对指纹识别全屏化和指纹识别精度的需求也逐渐提升，显示装置中需要布置的指纹识别单元和信号读取线的数量也相应增多；对应地，信号接收单元中所需配置的信号传输通道数量增多，从而信号接收单元的开发难度增大且成本增加。
发明内容
本公开提出了一种指纹识别基板及其驱动方法和显示装置。
第一方面，本公开实施例提供了一种指纹识别基板，包括：呈阵列排布的多个指纹识别单元、多个信号读取线组和多个选通电路，多个所述指纹识别单元划分为沿行方向排布的多个第一指纹识别组，所述第一指纹识别组与所述信号读取线组一一对应，所述信号读取线组与所述选 通电路一一对应；
所述第一指纹识别组包括：在行方向排布的连续多列所述指纹识别单元，所述信号读取线组包括：与所对应所述第一指纹识别组内多列所述指纹识别单元一一对应的多条信号读取线，所述信号读取线与对应的一列所述指纹识别单元连接；
所述选通电路包括：与所对应的所述信号读取线组内多条所述信号读取线一一对应的多个开关电路，每条所述信号读取线均通过对应的所述开关电路与信号接收单元上的一个信号传输通道连接，所述开关电路用于控制其所连接的所述信号读取线和所述信号传输通道之间的通断；
在全部信号读取线中，位于同一所述信号读取线组中的不同所述信号读取线连接不同所述信号传输通道，且存在位于不同所述信号读取线组中的至少两条所述信号读取线连接同一所述信号传输通道。
在一些实施例中，所述信号接收单元上的所述信号传输通道划分为至少两个信号传输通道组，每个所述信号读取线组对应一个所述信号传输通道组，所述信号传输通道组中所述信号传输通道的数量大于其所对应的信号读取线组中所述信号读取线的数量。
在一些实施例中，每个所述第一指纹识别组中所述指纹识别单元的列数相同；
每个信号读取线组中所述信号读取线的数量相同。
在一些实施例中，多个所述信号读取线组在行方向上依次排布，至少两个信号传输通道组包括：第一信号传输通道组和第二信号传输通道组；
位于奇数位次的所述信号读取线组对应所述第一信号传输通道组；
位于偶数位次的所述信号读取线组对应所述第二信号传输通道组。
在一些实施例中，每个所述信号读取线组中全部所述信号读取线在行方向上依次排布；
在位于奇数位次的所有所述信号读取线组内，具有相同位次的所述信号读取线与所述第一信号传输通道组内的同一信号传输通道连接；
在位于偶数位次的所有所述信号读取线组内，具有相同位次的所述信号读取线与所述第二信号传输通道组内的同一信号传输通道连接。
在一些实施例中，每个所述信号传输通道组中信号传输通道的数量相同。
在一些实施例中，位于同一所述选通电路中的所述开关电路连接同一控制信号线，位于不同所述选通电路中的所述开关电路连接不同控制信号线；
位于同一所述选通电路中的所述开关电路配置为在同一所述控制信号线所提供控制信号的控制下同时导通或断路。
在一些实施例中，所述开关电路包括：开关晶体管；
所述开关晶体管的控制极与对应的所述控制信号线连接，所述开关晶体管的第一极与对应的所述信号读取线连接，所述开关晶体管的第二极与对应的所述信号传输通道连接。
在一些实施例中，多个所述指纹识别单元划分为沿列方向排布的多个第二指纹识别组，所述指纹识别基板还包括：多个栅极驱动电路和多个扫描驱动线组，所述第二指纹识别组与所述扫描驱动线组一一对应，所述扫描驱动线组与所述栅极驱动电路一一对应；
所述第二指纹识别组包括：在列方向排布的连续多行所述指纹识别单元，所述扫描驱动线组包括：与所对应所述第二指纹识别组内多行所述指纹识别单元一一对应的多条扫描驱动线，所述扫描驱动线与对应的一行所述指纹识别单元连接；
所述栅极驱动电路包括：与所对应的所述扫描驱动线组内多条扫描驱动线一一对应的多个级联的移位寄存器，所述移位寄存器的信号输出端与对应的扫描驱动线连接。
在一些实施例中，全部所述扫描驱动线组在列方向上依次排布；
与位于奇数位次的所述扫描驱动线组相连的所述栅极驱动电路位于对应的所述扫描驱动线组的第一侧，与位于偶数位次的所述扫描驱动线组相连的所述栅极驱动电路位于对应的所述扫描驱动线组的第二侧，所述第一侧和所述第二侧为所述扫描驱动线组在行方向上的相对两侧。
在一些实施例中，每个所述第二指纹识别组中所述指纹识别单元的行数相同；
每个扫描驱动线组中所述扫描驱动线的数量相同。
第二方面，本公开实施例还提供了一种显示装置，包括：如上述第一方面提供的所述指纹识别基板。
第三方面，本公开实施例还提供了一种指纹识别驱动方法，所述驱动方法基于指纹识别基板，所述指纹识别基板采用第一方面提供的所述指纹识别基板，每个所述第一指纹识别组具有对应的指纹识别区域，所述驱动方法包括：
指纹识别区域与指纹区域存在交叠的所述第一指纹识别组所对应所述选通电路内所有开关电路导通，处于导通状态的开关电路将所连接的所述信号读取线中的检测信号传递对应的信号传输通道。
在一些实施例中，全部所述指纹识别单元划分为沿列方向排布的多个第二指纹识别组，所述指纹识别基板还包括：多个栅极驱动电路和多个扫描驱动线组，所述驱动方法还包括：
全部所述栅极驱动电路同步开始进行扫描驱动。
附图说明
图1为本公开实施例提供的指纹识别基板的一种电路结构示意图；
图2为本公开实施例中指纹识别单元的一种电路结构示意图；
图3为本公开实施例中一个第一指纹识别组及其对应的信号读取线 组和选通电路的电路结构示意图；
图4为本公开实施例中一个第二指纹识别组及其对应的扫描驱动线组和栅极驱动电路的电路结构示意图；
图5为本公开实施例提供的指纹识别基板的另一种电路结构示意图；
图6为本公开实施例中一个指纹识别块的电路结构示意图；
图7为本公开实施例提供的另一种指纹识别驱动方法的流程图。
具体实施方式
为使本领域的技术人员更好地理解本公开的技术方案，下面结合附图对本公开提供的一种指纹识别基板及其驱动方法和显示装置进行详细描述。
图1为本公开实施例提供的指纹识别基板的一种电路结构示意图，图2为本公开实施例中指纹识别单元的一种电路结构示意图，图3为本公开实施例中一个第一指纹识别组及其对应的信号读取线组和选通电路的电路结构示意图，图4为本公开实施例中一个第二指纹识别组及其对应的扫描驱动线组和栅极驱动电路的电路结构示意图。如图1至图4所示，该指纹识别基板包括：呈阵列排布的多个指纹识别单元1、多个信号读取线组6和多个选通电路MUX_1～MUX_n，多个指纹识别单元1划分为沿行方向排布的多个第一指纹识别组2，第一指纹识别组2与信号读取线组6一一对应，信号读取线组6与选通电路MUX_1～MUX_n一一对应。
第一指纹识别组2包括：在行方向排布的连续多列指纹识别单元1，信号读取线组6包括：与所对应第一指纹识别组2内多列指纹识别单元1一一对应的多条信号读取线RL，信号读取线RL与对应的一列指纹识别单元1连接。
选通电路MUX_1～MUX_n包括：与所对应的信号读取线组6内多条信 号读取线RL一一对应的多个开关电路T_1～T_b，每条信号读取线RL均通过对应的开关电路T1～Tb与信号接收单元5上的一个信号传输通道channel_1～channel_2b连接，开关电路T_1～T_b用于控制其所连接的信号读取线RL和信号传输通道channel_1～channel_2b之间的通断。其中，信号接收单元5具体可以为指纹识别IC。
在全部信号读取线RL中，位于同一信号读取线组6中的不同信号读取线RL连接不同信号传输通道，且存在位于不同信号读取线组6中的至少两条信号读取线RL连接同一信号传输通道。需要说明的是，本公开实施例中，信号读取线RL与对应的信号传输通道连接具体是指信号读取线RL通过所配置的开关电路T_1～T_b来与对应的信号传输通道实现电连接，并不表示信号读取线RL与对应的信号传输通道直接相连。
指纹识别单元1为指纹识别过程中的最小单元，可用于识别指纹上与该指纹识别单元1正对部分的谷脊情况。如图2所示，在一些实施例中，指纹识别单元1为一种光学指纹识别单元，包括：包括：晶体管M和光敏二极管P，晶体管M的控制极与对应行的扫描驱动线Gate连接，晶体管M的第一极与光敏二极管P连接，晶体管M的第二极与对应列的信号读取线RL连接，光敏二极管P具有PIN结构，该PIN结构能够产生光电效应。在此情况下，当扫描驱动线Gate输入有扫描驱动信号时，上述信号读取线RL施加高压，使得光敏二极管P反偏。此时，当手指与指纹识别基板相接触时，背光源提供的光线透过指纹识别基板照射至指纹的表面，并通过指纹表面反射至上述光敏二极管P。其中，反射至光敏二极管P的光线越强，光敏二极管P向读取信号线输出的电流(即指纹信号)越大。由于指纹表面的脊线和谷线反射至光敏二极管P的光线强度不同，从而使得脊线和谷线位置处的读取信号线读出的电流的大小不同，以实现指纹谷线或脊线的检测。
需要说明的是，图2中所示指纹识别单元1的具体结构仅起到示例 性作用，其不会对本公开的技术方案产生限制；在本公开实施例中，指纹识别单元1包括但不限于光学指纹识别单元、超声指纹识别单元、电容式指纹识别单元，对于指纹识别单元的具体结构，本公开的技术方案不作限定。
在本公开实施例中，通过将指纹识别单元1和信号读取线RL均沿行方向进行分组，且在信号读取线RL与对应的信号传输通道之间设置开关电路T_1～T_b，以使得位于不同信号读取线RL中的信号读取线RL能够共用信号传输通道，从而使得指纹识别单元1阵列所需配置的信号传输通道数量减小，对信号接收单元5上的信号传输通道数要求降低。
在本公开实施例中，由于第一指纹识别组2所对应指纹识别区域在列方向上的长度已经确定，因此通过对各第一指纹识别组2所包含的指纹识别单元1的列数进行控制，即可对第一指纹识别组2所对应指纹识别区域在行方向上的长度进行控制，从而实现对第一指纹识别组2所对应指纹识别区域的面积进行控制。作为一种可选方案，各第一指纹识别组2所对应的指纹识别区域在行方向上的长度略大于一个完整指纹的长度(可通过经验数据来得到)。
在对多个指纹识别单元1沿行方向进行分组时，各第一指纹识别组2所包含的指纹识别单元1的列数可分别进行设计，各第一指纹识别组2所包含的指纹识别单元1的列数可以相同，也可以不同。
图5为本公开实施例提供的指纹识别基板的另一种电路结构示意图。如图5所示，作为一种可选实施方案，每个第一指纹识别组2中指纹识别单元1的列数相同，每个信号读取线组6中信号读取线RL的数量相同，所有信号读取线组6对应相同的多个信号传输通道。
以图5中所示情况为例，多个指纹识别单元1沿行方向进行分组得到n个第一指纹识别组2，信号读取线组6和选通电路MUX_1～MUX_n的数量为n，每个第一指纹识别组2包括b列指纹识别单元1，每个信号读 取线组6包括b条信号读取线RL，每个选通电路MUX_1～MUX_n包括b个开关电路T_1～T_b，n个信号读取线组6对应b个信号传输通道channel_1～channel_b。由此可见，针对n*b条信号读取线RL，仅需配置b个信号传输通道channel_1～channel_b，此时每个信号传输通道channel_1～channel_b连接n条信号读取线RL。
在一些实施例中，信号接收单元5上的信号传输通道划分为至少两个信号传输通道组，每个信号读取线组6对应一个信号传输通道组，信号传输通道组中信号传输通道的数量大于其所对应的信号读取线组6中信号读取线RL的数量。作为一种可选实施方案，每个信号传输通道组中信号传输通道的数量相同。
在本公开实施例中，可对信号接收单元5上的信号传输通道进行分组，并将信号读取线组6与信号传输通道组进行对应，以便于信号传输通道对进行管理和控制。需要说明的是，每个信号传输通道组中信号传输通道的数量可以相同，也可以不同，仅需保证信号传输通道组中信号传输通道的数量大于其所对应的每一个信号读取线组6中信号读取线RL的数量；另外，每个信号传输通道组可以对应0个、1个、2个或多个信号读取线组6。此外，由于本公开中存在位于不同信号读取线组6中的至少两条信号读取线RL连接同一信号传输通道的情况，因此必然存在至少一个信号传输通道组对应于2个或多个信号读取线组6。
参见图1中所示，多个信号读取线组6在行方向上依次排布，至少两个信号传输通道组包括：第一信号传输通道组和第二信号传输通道组；位于奇数位次的信号读取线组6对应第一信号传输通道组；位于偶数位次的信号读取线组6对应第二信号传输通道组。
作为一个可选示例，第一信号传输通道组包括b个信号传输通道channel_1～channel_b，第二信号传输通道组包括b个信号传输通道channel_b+1～channel_2b。
每个第一指纹识别组2包括54列指纹识别单元1，每个信号读取线组6包括54条信号读取线RL，每个选通电路MUX_1～MUX_n包括54个开关电路T_1～T_b；信号接收单元5具有108个信号传输通道，分别记为：channel_1～channel_108，channel_1～channel_54作为第一信号传输通道组，channel_55～channel_108作为第二信号传输通道组(即上述b取值为54)。位于奇数位次的信号读取线组6中的54条信号读取线RL对应第一信号传输通道组中54个信号传输通道，位于偶数位次的信号读取线组6中的54条信号读取线RL对应第二信号传输通道组中54个信号传输通道。
在一些实施例中，每个信号读取线组6中全部信号读取线RL在行方向上依次排布；在位于奇数位次的所有信号读取线组6内，具有相同位次的信号读取线RL与第一信号传输通道组内的同一信号传输通道连接；在位于偶数位次的所有信号读取线组6内，具有相同位次的信号读取线RL与第二信号传输通道组内的同一信号传输通道连接。
以图1中所示情况为例，在各位于奇数位次的信号读取线组6内，第i条信号读取线RL与第一信号传输通道组内第i个信号传输通道连接，具体地，对于位于奇数位次的信号读取线组6，其内第i条信号读取线RL与信号传输通道channel_i连接。在各位于偶数位次的信号读取线组6内，第i条信号读取线RL与第二信号传输通道组内第i个信号传输通道连接，具体地，对于位于偶数位次的信号读取线组6，其内第i条信号读取线RL与信号传输通道channel_i+54连接。其中，i为整数且1≤i≤54。
在一些实施例中，位于同一选通电路MUX_1～MUX_n中的开关电路T_1～T_b连接同一控制信号线mux_1～mux_n，位于不同选通电路MUX_1～MUX_n中的开关电路T_1～T_b连接不同控制信号线mux_1～mux_n；位于同一选通电路MUX_1～MUX_n中的开关电路T_1～T_b配置为 在同一控制信号线mux_1～mux_n所提供控制信号的控制下同时导通或断路。通过该设置可有效的减少控制信号线的数量，节省布线空间，有利于窄边框化。
参见图1和图5所示，在一些实施例中，开关电路T_1～T_b包括：开关晶体管；开关晶体管的控制极与对应的控制信号线mux_1～mux_n连接，开关晶体管的第一极与对应的信号读取线RL连接，开关晶体管的第二极与对应的信号传输通道连接。位于同一选通电路MUX_1～MUX_n中的开关晶体管在所对应的一条控制信号线的控制下，可实现同时导通或断路。
在本公开实施例中，在进行指纹识别过程中，对应于同一信号传输通道组的不同选通电路MUX_1～MUX_n，在任意时刻至多仅一个选通电路MUX_1～MUX_n处于导通状态(该选通电路MUX_1～MUX_n内的开关电路T_1～T_b同时导通)，以将对应的信号读取线组6中各信号读取线RL上的信号传递给信号接收单元5。对应于同一信号传输通道组的不同选通电路MUX_1～MUX_n，可以在不同时刻依次导通，以实现将不同信号读取线组6中各信号读取线RL上的信号依次传递给信号接收单元5。基于上述技术手段，可实现对信号传输通道的分时复用。
在显示产品中，指纹识别驱动与画面显示驱动是在错开进行的，即在进行指纹识别驱动过程中，画面显示驱动是暂停的，因此为保证避免指纹识别驱动时间过长而影响到显示产品的整体显示效果，需使得完成一次完整的指纹识别的时间要小于1帧显示图像的刷新时间。在一行指纹识别单元1所对应的扫描驱动(简称行扫描驱动)时间t固定的情况下，完成一次完整的指纹识别所需要的时间由进行行扫描驱动的次数所决定；在相关技术中，一般是对指纹识别基板上的每一行指纹识别单元1依次进行行扫描驱动，然而随着指纹识别单元1的行数增多，完成一次完整的指纹识别所需花费的时间增长，极其容易超过1帧显示图像的 刷新时间，从而显示效果不佳。
为克服上述技术问题，本公开实施例提供了相应的解决方案，下面将结合附图进行详细描述。
继续参见图1和图5中所示，多个指纹识别单元1划分为沿列方向排布的多个第二指纹识别组3，指纹识别基板还包括：多个栅极驱动电路GOA1～GOAm和多个扫描驱动线组7，第二指纹识别组3与扫描驱动线组7一一对应，扫描驱动线组7与栅极驱动电路GOA1～GOAm一一对应。
第二指纹识别组3包括：在列方向排布的连续多行指纹识别单元1，扫描驱动线组7包括：与所对应第二指纹识别组3内多行指纹识别单元1一一对应的多条扫描驱动线Gate，扫描驱动线Gate与对应的一行指纹识别单元1连接。
栅极驱动电路GOA1～GOAm包括：与所对应的扫描驱动线组7内多条扫描驱动线Gate一一对应的多个级联的移位寄存器SR1～SRa，移位寄存器SR1～SRa的信号输出端与对应的扫描驱动线Gate连接。
在本公开实施例中，对于移位寄存器SR1～SRa的具体电路结构不作限定，其可以采用现有任意移位寄存器的电路结构。针对每个栅极驱动电路GOA1～GOAm，其内第一级的移位寄存器SR与对应的一个扫描驱动起始信号端STV1～STVm连接。在扫描驱动起始信号端STV1～STVm提供有效信号时，则对应的栅极驱动电路GOA1～GOAm开始进行逐行扫描驱动。栅极驱动电路的具体工作过程属于本领域的常规技术，此处不再赘述。
在本公开实施例中，由于第二指纹识别组3所对应指纹识别区域在行方向上的长度已经确定，因此通过对各第二指纹识别组3所包含的指纹识别单元1的行数进行控制，即可对第二指纹识别组3所对应指纹识别区域在列方向上的长度进行控制，从而实现对第二指纹识别组3所对应指纹识别区域的面积进行控制。作为一种可选方案，各第二指纹识别 组3所对应的指纹识别区域的在列方向上的长度略大于一个完整指纹的长度，这样的设计是为了保证在同时对各第二指纹识别组3中的各行指纹识别单元1进行依次行扫描驱动时，在任意时刻位于同一列的指纹识别单元1中至多存在一个指纹识别单元1输出有效的指纹信号。
在实际应用中，在对多个指纹识别单元1沿列方向进行分组时，各第二指纹识别组3所包含的指纹识别单元1的行数可分别进行设计，各第二指纹识别组3所包含的指纹识别单元1的行数可以相同，也可以不同。
继续参见图1和图5中所示，在一些实施例中，每个第二指纹识别组3中指纹识别单元1的行数相同，每个扫描驱动线组7中扫描驱动线Gate的数量相同。
在本公开实施例中，通过对通过将指纹识别单元1和扫描驱动线Gate沿列方向进行分组，且每一个第二指纹识别组3对应一个扫描驱动线组7和一个栅极驱动电路，因此可以对每一个第二指纹识别组3单独进行扫描驱动。
作为一种可选驱动方案，可仅对指纹识别区域与指纹区域存在交叠的第二指纹识别组3进行扫描驱动。
作为另一种可选驱动方案，在各第二指纹识别组3所对应的指纹识别区域的在列方向上的长度略大于一个完整指纹的长度时，也可以控制全部栅极驱动电路GOA1～GOAm同步开始进行扫描驱动。需要说明的是，在多个栅极驱动电路GOA1～GOAm同步开始进行扫描驱动的过程中，由于第二指纹识别组3所对应的指纹识别区域的在列方向上的长度略大于一个完整指纹的长度，因此在位于同一列且被同时驱动的多个指纹识别单元1中至多存在一个指纹识别单元1输出有指纹信号，该列上的其他指纹识别单元1由于未被指纹所覆盖因此即便被驱动也无指纹信号的输出，因而不会产生多个指纹信号串扰的问题。
在一些实施例中，多个扫描驱动线组7在列方向上依次排布；与位于奇数位次的扫描驱动线组7相连的栅极驱动电路GOA1、GOA3…位于对应的扫描驱动线组7的第一侧，与位于偶数位次的扫描驱动线组7相连的栅极驱动电路GOA2、GOA3…位于对应的扫描驱动线组7的第二侧，第一侧和第二侧为扫描驱动线组7在行方向上的相对两侧。上述将栅极驱动电路GOA1～GOAm均匀设置于设计指纹识别基板在行方向上的相对两侧，可使得每个栅极驱动电路GOA1～GOAm可占用空间增大，便于版图设计。
图6为本公开实施例中一个指纹识别块的电路结构示意图。如图1、图5和图6所示，在将多个指纹识别单元1沿行方向划分第一指纹识别组2、沿列方向划分第一指纹识别组2后，可以得到呈阵列排布的多个指纹识别块4。示例性地，第一指纹识别组2和选通电路MUX_1～MUX_n的数量为n个，每个第一指纹识别组2包括b列指纹识别单元1，第二指纹识别组3的数量为m个，每个第一指纹识别组2包括a行指纹识别单元1，此时可得到m*n个指纹识别块4，每个指纹识别块4包括a行、b列共计a*b个指纹识别单元1，每个选选通电路MUX_1～MUX_n包括b个开关电路；其中，a和b的取值可根据实际情况来设定。在实际应用中，在对a和b的取值进行设定时，可使得一个指纹识别块4所对应的指纹识别区域能够完全容纳一个完整指纹(完整指纹的参数可通过经验数据来得到)。
本公开实施例还提供了一种指纹识别驱动方法，该指纹识别驱动方法基于前面实施例提供的指纹识别基板，该指纹识别驱动方法包括：
步骤S1、指纹识别区域与指纹区域存在交叠的第一指纹识别组所对应选通电路内所有开关电路导通，处于导通状态的开关电路将所连接的信号读取线中的检测信号传递对应的信号传输通道。
其中，在指纹识别区域与指纹区域存在交叠的第一指纹识别组有2 个或多个，且该2个或多个第一指纹识别组中的任意两个第一指纹识别组都对应不同的传输通道组时，则该2个或多个第一指纹识别组所对应选通电路内所有开关电路可以同时导通。
在指纹识别区域与指纹区域存在交叠的第一指纹识别组有2个或多个，且且该2个或多个第一指纹识别组中存在某2个或多个第一指纹识别组对应同一传输通道组时，则对应于同一传输通道组的某2个或多个第一指纹识别组所连接的多个选通电路需要在每一个行扫描驱动阶段中依次导通。
图7为本公开实施例提供的另一种指纹识别驱动方法的流程图，如图7所示，该指纹识别驱动方法基于前面实施例提供的指纹识别基板，其中指纹识别基板上的多个指纹识别单元划分为沿列方向排布的多个第二指纹识别组，第二指纹识别组与扫描驱动线组一一对应，扫描驱动线组与栅极驱动电路一一对应，该指纹识别驱动方法包括：
步骤S1、指纹识别区域与指纹区域存在交叠的第一指纹识别组所对应选通电路内所有开关电路导通，处于导通状态的开关电路将所连接的信号读取线中的检测信号传递对应的信号传输通道。
步骤S2、全部栅极驱动电路同步开始进行扫描驱动。
其中，步骤S1与步骤S2同步进行。
以图1中所示情况为例；作为一种可选的指纹识别驱动方案，事先对指纹区域进行定位(由显示产品中的触控功能模块实现)，以确定出指纹识别区域与指纹区域存在交叠的第一指纹识别组及其对应的选通电路。在进行指纹识别驱动过程中，全部栅极驱动电路同步开始进行扫描驱动，在每一个行扫描驱动阶段中，通过向事先确定出的选通电路提供相应的控制信号，使得确定出的选通电路同时导通或依次导通(若确定出的选通电路为多个且存在至少两个选通电路对应同一传输通道组时，则同一传输通道组的至少两个选通电路需要依次导通)。
作为另一种可选的指纹识别驱动方案，在进行指纹识别驱动过程中，全部栅极驱动电路同步开始进行扫描驱动，在每一个行扫描驱动阶段中，各选通电路依次导通，在该过程中必然会存在指纹识别区域与指纹区域存在交叠的第一指纹识别组所对应选通电路导通的步骤。该驱动方案的优势在于无需对指纹区域进行事先定位。
需要说明的是，在事先对指纹区域进行定位的情况下，也可以确定出指纹识别区域与指纹区域存在交叠的第二指纹识别组及其对应的栅极驱动电路。在进行指纹识别驱动过程中，仅需控制事先确定出的栅极驱动电路进行扫描驱动(在所确定出的栅极驱动电路为2个或多个时，所确定出的2个或多个栅极驱动电路可以同步进行扫描驱动或依次进行扫描驱动)，而其他栅极驱动电路不进行扫描驱动。
本公开实施例还提供了一种显示装置，包括：指纹识别基板，该指纹识别基板采用上述任一实施例提供的指纹识别基板。
在一些实施例中，显示装置还包括：显示功能模块，显示功能模块可为液晶显示功能模块或有机发光显示功能模块，显示功能模块可以与指纹识别基板在同一基板上，也可以在不同基板上。另外，显示装置还可以包括触控功能模块。显示功能模块和触控功能模块的具体结构以及与指纹识别基板的集成，均属于本领域的常规技术内容，此处不再赘述。
本公开实施例提供的显示装置，可以是电脑、电视、车载显示装置等其他具有显示功能的结构或装置，本发明对此不作具体限制。本发明实施例提供的显示装置，具有本发明实施例提供的指纹识别基板的有益效果，具体可以参考上述各实施例对于指纹识别基板的具体说明，本实施例在此不再赘述。
可以理解的是，以上实施方式仅仅是为了说明本公开的原理而采用的示例性实施方式，然而本公开并不局限于此。对于本领域内的普通技 术人员而言，在不脱离本公开的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本公开的保护范围。

Claims (14)

  1. 一种指纹识别基板，其中，包括：呈阵列排布的多个指纹识别单元、多个信号读取线组和多个选通电路，多个所述指纹识别单元划分为沿行方向排布的多个第一指纹识别组，所述第一指纹识别组与所述信号读取线组一一对应，所述信号读取线组与所述选通电路一一对应；
    所述第一指纹识别组包括：在行方向排布的连续多列所述指纹识别单元，所述信号读取线组包括：与所对应所述第一指纹识别组内多列所述指纹识别单元一一对应的多条信号读取线，所述信号读取线与对应的一列所述指纹识别单元连接；
    所述选通电路包括：与所对应的所述信号读取线组内多条所述信号读取线一一对应的多个开关电路，每条所述信号读取线均通过对应的所述开关电路与信号接收单元上的一个信号传输通道连接，所述开关电路用于控制其所连接的所述信号读取线和所述信号传输通道之间的通断；
    在全部信号读取线中，位于同一所述信号读取线组中的不同所述信号读取线连接不同所述信号传输通道，且存在位于不同所述信号读取线组中的至少两条所述信号读取线连接同一所述信号传输通道。
  2. 根据权利要求1所述的指纹识别基板，其中，所述信号接收单元上的所述信号传输通道划分为至少两个信号传输通道组，每个所述信号读取线组对应一个所述信号传输通道组，所述信号传输通道组中所述信号传输通道的数量大于其所对应的信号读取线组中所述信号读取线的数量。
  3. 根据权利要求2所述的指纹识别基板，其中，每个所述第一指纹识别组中所述指纹识别单元的列数相同；
    每个信号读取线组中所述信号读取线的数量相同。
  4. 根据权利要求3所述的指纹识别基板，其中，多个所述信号读取线组在行方向上依次排布，至少两个信号传输通道组包括：第一信号传输通道组和第二信号传输通道组；
    位于奇数位次的所述信号读取线组对应所述第一信号传输通道组；
    位于偶数位次的所述信号读取线组对应所述第二信号传输通道组。
  5. 根据权利要求4所述的指纹识别基板，其中，每个所述信号读取线组中多条所述信号读取线在行方向上依次排布；
    在位于奇数位次的所有所述信号读取线组内，具有相同位次的所述信号读取线与所述第一信号传输通道组内的同一信号传输通道连接；
    在位于偶数位次的所有所述信号读取线组内，具有相同位次的所述信号读取线与所述第二信号传输通道组内的同一信号传输通道连接。
  6. 根据权利要求2所述的指纹识别基板，其中，每个所述信号传输通道组中信号传输通道的数量相同。
  7. 根据权利要求1所述的指纹识别基板，其中，位于同一所述选通电路中的所述开关电路连接同一控制信号线，位于不同所述选通电路中的所述开关电路连接不同控制信号线；
    位于同一所述选通电路中的所述开关电路配置为在同一所述控制信号线所提供控制信号的控制下同时导通或断路。
  8. 根据权利要求7所述的指纹识别基板，其中，所述开关电路包括：开关晶体管；
    所述开关晶体管的控制极与对应的所述控制信号线连接，所述开关晶体管的第一极与对应的所述信号读取线连接，所述开关晶体管的第二极与对应的所述信号传输通道连接。
  9. 根据权利要求1-8中任一所述的指纹识别基板，其中，多个所述指纹识别单元划分为沿列方向排布的多个第二指纹识别组，所述指纹识别基板还包括：多个栅极驱动电路和多个扫描驱动线组，所述第二指纹识别组与所述扫描驱动线组一一对应，所述扫描驱动线组与所述栅极驱动电路一一对应；
    所述第二指纹识别组包括：在列方向排布的连续多行所述指纹识别单元，所述扫描驱动线组包括：与所对应所述第二指纹识别组内多行所述指纹识别单元一一对应的多条扫描驱动线，所述扫描驱动线与对应的一行所述指纹识别单元连接；
    所述栅极驱动电路包括：与所对应的所述扫描驱动线组内多条扫描驱动线一一对应的多个级联的移位寄存器，所述移位寄存器的信号输出端与对应的扫描驱动线连接。
  10. 根据权利要求9所述的指纹识别基板，其中，多个所述扫描驱动线组在列方向上依次排布；
    与位于奇数位次的所述扫描驱动线组相连的所述栅极驱动电路位于对应的所述扫描驱动线组的第一侧，与位于偶数位次的所述扫描驱动线组相连的所述栅极驱动电路位于对应的所述扫描驱动线组的第二侧，所述第一侧和所述第二侧为所述扫描驱动线组在行方向上的相对两侧。
  11. 根据权利要求9所述的指纹识别基板，其中，每个所述第二指纹识别组中所述指纹识别单元的行数相同；
    每个扫描驱动线组中所述扫描驱动线的数量相同。
  12. 一种显示装置，其中，包括：如上述权利要求1-11中任一所述的指纹识别基板。
  13. 一种指纹识别驱动方法，其中，所述驱动方法基于指纹识别基板，所述指纹识别基板采用权利要求1-11中任一所述的指纹识别基板，每个所述第一指纹识别组具有对应的指纹识别区域，所述驱动方法包括：
    指纹识别区域与指纹区域存在交叠的所述第一指纹识别组所对应所述选通电路内所有开关电路导通，处于导通状态的开关电路将所连接的所述信号读取线中的检测信号传递对应的信号传输通道。
  14. 根据权利要求13所述的纹识别驱动方法，其中，所述指纹识别基板采用上述权利要求9所述的指纹识别基板，所述驱动方法还包括：
    全部所述栅极驱动电路同步开始进行扫描驱动。
PCT/CN2020/118871 2020-09-29 2020-09-29 指纹识别基板及其驱动方法和显示装置 WO2022067516A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202080002204.2A CN114787758A (zh) 2020-09-29 2020-09-29 指纹识别基板及其驱动方法和显示装置
PCT/CN2020/118871 WO2022067516A1 (zh) 2020-09-29 2020-09-29 指纹识别基板及其驱动方法和显示装置
US17/419,909 US11810389B2 (en) 2020-09-29 2020-09-29 Fingerprint recognition substrate, driving method thereof and display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/118871 WO2022067516A1 (zh) 2020-09-29 2020-09-29 指纹识别基板及其驱动方法和显示装置

Publications (1)

Publication Number Publication Date
WO2022067516A1 true WO2022067516A1 (zh) 2022-04-07

Family

ID=80949275

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/118871 WO2022067516A1 (zh) 2020-09-29 2020-09-29 指纹识别基板及其驱动方法和显示装置

Country Status (3)

Country Link
US (1) US11810389B2 (zh)
CN (1) CN114787758A (zh)
WO (1) WO2022067516A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230154229A1 (en) * 2021-11-15 2023-05-18 Hannstouch Solution Incorporated Fingerprint sensing device and display device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114694192A (zh) * 2022-03-31 2022-07-01 上海天马微电子有限公司 检测电路及其驱动方法和显示装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105205440A (zh) * 2015-02-13 2015-12-30 比亚迪股份有限公司 用于指纹传感器的数据处理方法及电子装置
CN110263750A (zh) * 2019-06-27 2019-09-20 厦门天马微电子有限公司 显示面板和显示装置
CN110851024A (zh) * 2019-12-20 2020-02-28 厦门天马微电子有限公司 显示面板及显示装置
CN111124184A (zh) * 2019-12-26 2020-05-08 厦门天马微电子有限公司 显示模组及显示装置
CN111160287A (zh) * 2019-12-31 2020-05-15 厦门天马微电子有限公司 显示面板及其指纹识别方法、显示装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105205440A (zh) * 2015-02-13 2015-12-30 比亚迪股份有限公司 用于指纹传感器的数据处理方法及电子装置
CN110263750A (zh) * 2019-06-27 2019-09-20 厦门天马微电子有限公司 显示面板和显示装置
CN110851024A (zh) * 2019-12-20 2020-02-28 厦门天马微电子有限公司 显示面板及显示装置
CN111124184A (zh) * 2019-12-26 2020-05-08 厦门天马微电子有限公司 显示模组及显示装置
CN111160287A (zh) * 2019-12-31 2020-05-15 厦门天马微电子有限公司 显示面板及其指纹识别方法、显示装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230154229A1 (en) * 2021-11-15 2023-05-18 Hannstouch Solution Incorporated Fingerprint sensing device and display device

Also Published As

Publication number Publication date
US11810389B2 (en) 2023-11-07
US20220319221A1 (en) 2022-10-06
CN114787758A (zh) 2022-07-22

Similar Documents

Publication Publication Date Title
US11227538B2 (en) Display panel and display apparatus having a light-transmitting display area
US10776602B2 (en) Print recognition module, method for driving the same, and display device
CN109241940B (zh) 一种显示面板及其指纹识别驱动方法、显示装置
US10095905B2 (en) Fingerprint identification device, driving method thereof, display panel and display apparatus
CN108648691A (zh) 显示面板及其驱动方法、显示装置
WO2022067516A1 (zh) 指纹识别基板及其驱动方法和显示装置
US9927919B2 (en) Array substrate, drive method, display panel and display device
CN108664907B (zh) 阵列基板、显示面板及显示装置
US10423255B2 (en) Touch control display panel
US11042238B1 (en) Display panel and display device
CN110688030B (zh) 一种触控显示面板和显示装置
WO2020107435A1 (zh) 扫描电路、驱动电路、触控显示面板、接收切换电路及驱动方法
CN107450770B (zh) 内嵌式触控显示面板
US11687193B2 (en) Display substrate and display device
CN111160287B (zh) 显示面板及其指纹识别方法、显示装置
JP6533785B2 (ja) Ｏｌｅｄパネル、端末、及び、認識制御方法
US10141385B2 (en) Thin film transistor substrate and display panel using same
US10423252B2 (en) Array substrate, touch display panel, and touch display device
US10222897B2 (en) Array substrate, driving method, manufacturing method thereof and corresponding display apparatus
CN111752413B (zh) 触控显示面板及其驱动方法、显示装置
CN108828816B (zh) 一种支持全屏指纹识别的rgbw模组、显示屏及终端设备
WO2017041341A1 (zh) 阵列基板及触控显示装置
CN111007960A (zh) 触控显示面板与其驱动方法
US11158238B2 (en) Display panel and driving method thereof
CN111695547B (zh) 显示面板和显示装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20955542

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 10/07/2023)

122 Ep: pct application non-entry in european phase

Ref document number: 20955542

Country of ref document: EP

Kind code of ref document: A1