CN109389933B - Driving method of fingerprint identification module and display device - Google Patents
Driving method of fingerprint identification module and display device Download PDFInfo
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- CN109389933B CN109389933B CN201811562518.9A CN201811562518A CN109389933B CN 109389933 B CN109389933 B CN 109389933B CN 201811562518 A CN201811562518 A CN 201811562518A CN 109389933 B CN109389933 B CN 109389933B
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- 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
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- 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
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- 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
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- 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
- G06V40/1347—Preprocessing; Feature extraction
- G06V40/1359—Extracting features related to ridge properties; Determining the fingerprint type, e.g. whorl or loop
Abstract
The invention discloses a driving method and a display device of a fingerprint identification module, and relates to the technical field of display, wherein the fingerprint identification module comprises a plurality of fingerprint scanning lines, a plurality of fingerprint signal lines, a plurality of fingerprint identification units and a fingerprint identification driving circuit, and the fingerprint identification units on the same line are electrically connected with the same fingerprint scanning line; the driving method at least comprises a first working stage, in the first working stage, along the extending direction of the fingerprint signal lines, the fingerprint identification driving circuit at least provides driving scanning signals for two fingerprint scanning lines at each time, and at least four fingerprint scanning lines of two adjacent driving scanning comprise at least the same fingerprint scanning line. The overlapped scanning driving mode in the same scanning period is equivalent to connecting the fingerprint identification units which are scanned repeatedly, and the area of the fingerprint identification units is increased, so that the semaphore of the fingerprint identification units, the fingerprint identification accuracy and the detection effect are improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a driving method of a fingerprint identification module and a display device.
Background
The fingerprint is a line formed by concave-convex skin on the finger abdomen at the tail end of a human finger, also called as a palm print, namely a raised line on the epidermis, and the fingerprint of a person is a combination of heredity and environment and is closely related to the health of the human body, so that the fingerprint is common to all people but different from each other. The display device integrated with the fingerprint identification function can enable the display device to execute a specific function by using the fingerprint identification function when a user uses the display device, and the fingerprint identification function is convenient, quick and high in safety and is one of the research and development directions of the display device.
However, in the display device provided by the prior art, the fingerprint identification module needs to be additionally added to realize the fingerprint identification function, and after the display panel and the fingerprint identification module are respectively manufactured and completed, the display panel and the fingerprint identification module are assembled to realize the electrical connection, so that the process of the display device is increased, and the fingerprint identification module possibly occupies a certain area in the display device, which is not beneficial to realizing a full-screen. To this, prior art provides one kind with fingerprint identification module and display panel integrated technical scheme, specifically, integrates a plurality of fingerprint identification components and parts in display panel's display area, forms fingerprint identification components and parts array, then sets up drive circuit through the frame district at display panel, realizes the drive of fingerprint identification components and parts array, accomplishes fingerprint identification. However, in this method, in addition to requiring an additional fingerprint recognition component and being greatly affected by the mechanism of the whole device, the fingerprint recognition area can only be designed to be small so as not to affect the display effect of the display panel, so that the signal quantity of fingerprint recognition is small and the recognition is difficult.
Therefore, it is an urgent technical problem to provide a driving method and a display device for a fingerprint identification module, which can improve the scanning precision and the semaphore of the fingerprint identification module and improve the fingerprint identification effect.
Disclosure of Invention
In view of this, the present invention provides a driving method of a fingerprint identification module and a display device, and aims to solve the problems of low fingerprint identification signal amount, high fingerprint identification difficulty and low identification precision.
The invention provides a driving method of a fingerprint identification module, wherein the fingerprint identification module comprises a plurality of fingerprint scanning lines, a plurality of fingerprint signal lines, a plurality of fingerprint identification units and a fingerprint identification driving circuit, the fingerprint scanning lines and the fingerprint signal lines are crossed and insulated to define areas where the plurality of fingerprint identification units are located, the same line of fingerprint identification units are electrically connected with the same fingerprint scanning line, and the fingerprint identification driving circuit is electrically connected with the fingerprint scanning line; the driving method at least comprises a first working stage, in the first working stage, along the extending direction of the fingerprint signal lines, the fingerprint identification driving circuit at least provides driving scanning signals for two fingerprint scanning lines at each time, and at least four fingerprint scanning lines of two adjacent driving scanning comprise at least the same fingerprint scanning line.
Based on the same idea, the invention also provides a display device which comprises a display panel and the fingerprint identification module described in the driving method of the fingerprint identification module.
Compared with the prior art, the driving method and the display device of the fingerprint identification module at least realize the following beneficial effects:
the fingerprint identification device provides a driving voltage signal to the fingerprint identification unit through the fingerprint scanning lines and the fingerprint signal lines, so that the fingerprint identification unit finishes fingerprint identification and detection work, is electrically connected with each fingerprint scanning line through the fingerprint identification driving circuit, and provides a driving scanning signal to the same row of fingerprint identification units through the same fingerprint scanning line, so that the driving of the fingerprint identification unit array is realized, the fingerprint identification is finished, and then the fingerprint identification result is transmitted to the fingerprint detection result receiving unit through the fingerprint signal lines. Further, the fingerprint scanning lines of adjacent two-time drive scanning at least comprise the same fingerprint scanning line, namely in the same scanning period, the fingerprint identification driving circuit at least has a process of repeatedly providing a drive scanning signal for a certain fingerprint scanning line, the overlapped scanning driving mode is adopted, equivalently, the fingerprint identification units repeatedly scanned in the second direction are connected together, the area of the fingerprint identification units is increased, the signal quantity of the fingerprint identification units is increased, and the fingerprint identification accuracy and the detection effect are favorably improved.
Of course, it is not necessary for any product in which the present invention is practiced to specifically achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic plan view of a fingerprint identification module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a driving method of a fingerprint identification module according to an embodiment of the present invention;
FIG. 3 is a timing diagram of the corresponding output driving scan signals of FIG. 2;
fig. 4 is a schematic structural diagram of another driving method of a fingerprint identification module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another driving method of a fingerprint identification module according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another driving method of a fingerprint identification module according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another driving method of a fingerprint identification module according to an embodiment of the present invention;
FIG. 8 is a timing diagram illustrating another driving scan of the fingerprint identification module according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a planar structure of another fingerprint identification module according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of a planar structure of another fingerprint identification module according to an embodiment of the present invention;
FIG. 11 is a timing diagram of scan signals corresponding to the fingerprint identification driving circuit of FIG. 10;
FIG. 12 is a timing diagram of another driving scan signal according to an embodiment of the present invention;
FIG. 13 is a schematic diagram of a planar structure of another fingerprint identification module according to an embodiment of the present invention;
FIG. 14 is a timing diagram of scan signals corresponding to the fingerprint identification driving circuit of FIG. 13;
FIG. 15 is a schematic diagram of a planar structure of another fingerprint identification module according to an embodiment of the present invention;
FIG. 16 is a timing diagram of scan signals corresponding to the fingerprint identification driver circuit of FIG. 15;
FIG. 17 is a schematic diagram of a planar structure of another fingerprint identification module according to an embodiment of the present invention;
FIG. 18 is a timing diagram of scan signals corresponding to the fingerprint identification driver circuit of FIG. 17;
FIG. 19 is a timing diagram of another driving scan signal according to an embodiment of the present invention;
FIG. 20 is a schematic diagram of a planar structure of another fingerprint identification module according to an embodiment of the present invention;
FIG. 21 is a timing diagram of scan signals corresponding to the fingerprint identification driver circuit of FIG. 20;
fig. 22 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 23 is a schematic structural diagram of another display device according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1, fig. 1 is a schematic plan view of a fingerprint identification module according to an embodiment of the present invention, and a driving method of the fingerprint identification module according to the embodiment of the present invention includes a plurality of fingerprint scanning lines 10, a plurality of fingerprint signal lines 20, a plurality of fingerprint identification units 30, and a fingerprint identification driving circuit 40, where the fingerprint scanning lines 10 and the fingerprint signal lines 20 are crossed and insulated to define an area where the plurality of fingerprint identification units 30 are located, the same row of fingerprint identification units 30 are electrically connected to the same fingerprint scanning line 10, and the fingerprint identification driving circuit 40 is electrically connected to the fingerprint scanning lines 10;
the driving method of the fingerprint identification module 100 provided by this embodiment at least includes a first working phase, and in the first working phase, along the extending direction of the fingerprint signal line 20, the fingerprint identification driving circuit 40 provides the driving scanning signal to at least two fingerprint scanning lines 10 at a time, and at least includes the same fingerprint scanning line 10 in at least four fingerprint scanning lines 10 of two adjacent driving scans.
Specifically, the fingerprint identification module 100 of this embodiment includes many fingerprint scanning lines 10, many fingerprint signal line 20, fingerprint scanning line 10 and fingerprint signal line 20 all are connected with fingerprint identification unit 30 electricity, and fingerprint scanning line 10 extends along first direction X, and fingerprint signal line 20 extends along second direction Y to provide the mode of driving voltage signal through fingerprint scanning line 10 and fingerprint signal line 20 to fingerprint identification unit 30, make fingerprint identification unit 30 accomplish fingerprint identification and detection work. The fingerprint scanning lines 10 and the fingerprint signal lines 20 are in a crossed insulation mode to limit the area where the plurality of fingerprint identification units 30 are located, namely the plurality of fingerprint identification units 30 are arranged in an array mode, the same row of fingerprint identification units 30 are electrically connected with the same fingerprint scanning line 10, namely the same row of fingerprint identification units 30 are electrically connected with each fingerprint scanning line 10 through the fingerprint identification driving circuit 40, the same fingerprint scanning line 10 is enabled to provide a driving scanning signal for the same row of fingerprint identification units 30, the array driving of the fingerprint identification units 30 is achieved, fingerprint identification is completed, and then the result of the fingerprint identification is transmitted to the fingerprint detection result receiving unit 50 through the fingerprint signal lines 20.
The driving method of the fingerprint identification module 100 of this embodiment at least includes a first working stage, in which, along the extending direction of the fingerprint signal line 20, i.e., the second direction Y, the fingerprint identification driving circuit 40 supplies driving scanning signals to at least two fingerprint scanning lines 10 at a time, and at least four fingerprint scanning lines 10 of two adjacent driving scans at least include the same fingerprint scanning line 10, specifically, if the fingerprint identification module 100 of this embodiment includes n fingerprint scanning lines 10, including G1, G2, … …, and G (n), which extend along the first direction X and are sequentially arranged in the second direction Y, then in the first working stage, along the second direction Y, the fingerprint identification driving circuit 40 may have the following driving scanning methods in the process of providing the driving scanning signals to the n fingerprint scanning lines 10 (in the drawing, whether the driving scanning is simultaneously turned on or not is distinguished by different filling of the fingerprint identification unit 30):
as shown in fig. 2 and fig. 3, fig. 2 is a schematic structural diagram of a driving method of a fingerprint identification module according to an embodiment of the present invention, fig. 3 is a timing diagram of driving scanning signals correspondingly output in fig. 2, the fingerprint identification driving circuit 40 of the present embodiment provides driving scanning signals to only two fingerprint scanning lines 10 each time, and four fingerprint scanning lines 10 of two adjacent driving scans include the same fingerprint scanning line 10, that is, the fingerprint identification driving circuit 40 provides driving scanning signals to n fingerprint scanning lines 10 sequentially according to the sequence of (G1+ G2), (G2+ G3), (G3+ G4), … …, (G (n-1) + G (n)); it should be noted that "+" in (G1+ G2) herein is used to indicate that G1 and G2 in the fingerprint scan line 10 perform the scan driving operation at the same time, and the remaining "+" in each place also indicates the same meaning, and is not repeated herein; gout1, Gout2, … …, Gout (n) are scanning driving signals supplied to each row of fingerprint identification cells 30 by the fingerprint identification driving circuit 40.
As shown in fig. 4, fig. 4 is a schematic structural diagram of another driving method of a fingerprint identification module according to an embodiment of the present invention, in which the fingerprint identification driving circuit 40 of this embodiment only provides driving scanning signals to three fingerprint scanning lines 10 at a time, and six fingerprint scanning lines 10 of two adjacent driving scans include the same fingerprint scanning line 10, that is, the fingerprint identification driving circuit 40 sequentially provides driving scanning signals to n fingerprint scanning lines 10 according to the sequence of (G1+ G2+ G3), (G3+ G4+ G5), (G5+ G6+ G7), … …, (G (n-2) + G (n-1) + G (n));
as shown in fig. 5, fig. 5 is a schematic structural diagram of another driving method of a fingerprint identification module according to an embodiment of the present invention, in which the fingerprint identification driving circuit 40 of this embodiment only provides driving scanning signals to three fingerprint scanning lines 10 at a time, and six fingerprint scanning lines 10 of two adjacent driving scans include the same two fingerprint scanning lines 10, that is, the fingerprint identification driving circuit 40 sequentially provides driving scanning signals to n fingerprint scanning lines 10 according to the sequence of (G1+ G2+ G3), (G2+ G3+ G4), (G3+ G4+ G5), … …, (G (n-2) + G (n-1) + G (n));
as shown in fig. 6 and 7, fig. 6 is a schematic structural diagram of another driving method of a fingerprint identification module according to an embodiment of the present invention, fig. 7 is a schematic structural diagram of another driving method of a fingerprint identification module according to an embodiment of the present invention, the fingerprint identification driving circuit 40 of this embodiment provides driving scanning signals to at least two fingerprint scanning lines 10 each time, the number of the fingerprint scanning lines 10 in adjacent times may be different, and the fingerprint scanning lines 10 in adjacent two times of driving scanning at least include the same fingerprint scanning line 10, that is, the fingerprint identification driving circuit 40 may provide driving scanning signals to n fingerprint scanning lines 10 in sequence according to (G1+ G2), (G2+ G3+ G4), (G4+ G5), (G5+ G6+ G7), … …, (G (n-2) + G (n-1) + G (n) (as shown in fig. 6), it is also possible that the fingerprint identification driving circuit 40 sequentially supplies the driving scanning signals to the n fingerprint scanning lines 10 in the order of (G1+ G2+ G3), (G2+ G3+ G4), (G4+ G5), (G5+ G6+ G7), (G6+ G7+ G8), (G8+ G9), … …, (G (n-2) + G (n-1) + G (n)) (as shown in fig. 7);
it should be noted that, this embodiment is merely an example of the driving method of the fingerprint identification module in this embodiment, but not limited to the above several scanning modes, but also can be other scanning modes, this embodiment is not described herein, it only needs to satisfy that the fingerprint scanning lines 10 of two adjacent driving scans at least include the same fingerprint scanning line 10, i.e. in the same scanning period, the fingerprint identification driving circuit 40 at least has a process of repeatedly providing a driving scanning signal to a certain fingerprint scanning line 10, adopt this overlap scanning driving mode, equivalently connect together the fingerprint identification units 30 of repeated scanning in the second direction Y, the area of the fingerprint identification unit 30 has been increased, thereby the semaphore of the fingerprint identification unit 30 has been increased, and the fingerprint identification accuracy and the detection effect can be improved.
It should be further noted that, as can be seen from the foregoing embodiments, when the driving method shown in fig. 2, 5 or 7 is used to perform the scanning driving operation of the fingerprint identification module, the signal amount superposed by the fingerprint identification units 30 in each row can be made as uniform as possible, and the remaining driving scanning operation time does not need to be additionally inserted in the middle of scanning, so as to further improve the accuracy and detection effect of fingerprint identification.
In some optional embodiments, please refer to fig. 1 and 8, fig. 8 is another driving and scanning timing diagram of the fingerprint identification module according to an embodiment of the present invention, in this embodiment, in a scanning period, the driving method of the fingerprint identification module further includes a second working phase B and a third working phase C, and the first working phase a is located between the second working phase B and the third working phase C;
in the second working phase B, the fingerprint identification driving circuit 40 only provides the driving scanning signal to the first fingerprint scanning line 10;
in the third operation phase C, the fingerprint identification driving circuit 40 provides the driving scanning signal to only the last fingerprint scanning line 10.
In this embodiment, it is further limited that in one scanning cycle, the driving method of the fingerprint identification module further includes a second working phase B before the first working phase a and a third working phase C after the first working phase a, since the fingerprint identification driving circuit 40 cannot perform overlapping scanning on the fingerprint identification units 30 in the first row and the fingerprint identification units 30 in the last row when the overlapped scanning driving method in the above embodiment provides the scanning driving signal to the fingerprint identification units 30, the embodiment adds the second working phase B and the third working phase C, wherein Gout1, Gout2, … …, Gout (n) are the scanning driving signals provided by the fingerprint identification driving circuit 40 to each row of fingerprint identification units 30, and this embodiment can improve the situation that the driving scanning on the fingerprint identification units 30 in all rows cannot be performed in the first working phase a, therefore, the signal quantity of each line of fingerprint identification units 30 is further improved, the signal quantity after superposition scanning of each line of fingerprint identification units 30 can be uniformized, and the fingerprint identification accuracy and identification effect are further improved.
It should be noted that, in some optional embodiments, in one scanning cycle, the scanning cycle may include a first working phase a, a second working phase B, and a third working phase C, may also include only the first working phase a and the second working phase B, and may also include only the first working phase a and the third working phase C.
In some optional embodiments, please refer to fig. 9, fig. 9 is a schematic plan view of another fingerprint identification module according to an embodiment of the present invention, in which the fingerprint identification module 100 is a capacitive fingerprint identification module or an optical fingerprint identification module.
The fingerprint identification module of this embodiment can be capacitanc fingerprint identification module, also can be optical fingerprint identification module.
The theory of operation of fingerprint identification unit 30 of capacitanc fingerprint identification module (not shown in the figure) is integrated the capacitive sensor ware in a chip, when the chip surface was pressed to the fingerprint, fingerprint identification unit 30 formed the electric field with electrically conductive subcutaneous electrolyte, the valley of fingerprint and the height fluctuation of ridge can lead to the pressure differential between the two to appear different changes, the capacitive sensor ware can be according to the fingerprint crest and the trough and the charge difference that produces, form the fingerprint image, borrow this way measuring of can realizing accurate fingerprint, this mode adaptability is strong, there is not special requirement to service environment.
Each fingerprint recognition unit 30 of the optical fingerprint recognition module (as shown in fig. 9) generally comprises two thin film transistors, one of which is a switch transistor T1 for controlling the switch, and the other is a photo transistor T2 for serving as a photo sensor, the photo transistor T2 is used for detecting the intensity of light, and the switch transistor T1 is used for controlling the output of photocurrent as a switch. When carrying out fingerprint scanning, because the difference between the fingerprint valley ridge, the light source shines and to produce different reflection on the finger, thereby make the light intensity that reaches sensitization transistor T2 department appear changing, produce different photocurrent differences, when switching transistor T1 opens (by fingerprint scanning line 10 to the grid of switching transistor T1 provide the scanning drive signal), current signal can be carried fingerprint test result receiving element 50 through fingerprint signal line 20 and handled, then acquire corresponding light intensity information, can realize the detection to fingerprint valley ridge, optical fingerprint identification module has antistatic ability reinforce, system stability is better, long service life, advantages such as sensitivity height.
In some optional embodiments, referring to fig. 1, in the present embodiment, the fingerprint identification driving circuit 40 is located at one side of the fingerprint scanning line 10 and electrically connected to the fingerprint scanning line 10.
The embodiment further illustrates that the fingerprint identification driving circuit 40 is located on one side of the fingerprint scanning line 10, and is electrically connected with the fingerprint scanning line 10, that is, the fingerprint identification module of the embodiment adopts a single-side driving mode, and the fingerprint identification driving circuit 40 provides a scanning driving signal on the same lateral fingerprint scanning line 10, so that the available space on one side of the display device opposite to the fingerprint identification driving circuit 40 can be increased, the size of the frame of the display device is reduced, and the narrow frame of the display device is further facilitated to be realized.
In some optional embodiments, please refer to fig. 10 and 11 in combination, fig. 10 is a schematic plane structure diagram of another fingerprint identification module provided in an embodiment of the present invention, fig. 11 is a timing diagram of scan signals corresponding to the fingerprint identification driving circuit of fig. 10, in this embodiment, the fingerprint identification module 100 includes M fingerprint scan lines 10, where M is greater than or equal to 2 and is an integer;
the fingerprint identification driving circuit 40 includes M cascaded Shift Register (SR) units 401 and M-1 or gate (or gate) circuit units 402, two input terminals of an mth or gate circuit unit 402 are electrically connected to output terminals of the mth shift register unit 401 and the (M + 1) th shift register unit 401, respectively, an output terminal of the mth or gate circuit unit 402 is electrically connected to the (M + 1) th fingerprint scanning line 10, where M is greater than or equal to 1 and is greater than or equal to M-1, and M is an integer.
The present embodiment further explains the connection structure of the fingerprint identification driving circuit 40, which includes M cascaded shift register units 401(SR1, SR2, SR3, … …, SR (M)), M-1 OR gate units 402(OR1, OR1, OR2, OR3, … …, OR (M-1)), two input terminals of the mth OR gate unit 402 are electrically connected to the output terminals of the mth shift register unit 401 and the M +1 shift register unit 401, respectively, and the output terminal of the mth OR gate unit 402 is electrically connected to the M +1 fingerprint scanning line 10, where M is equal to OR less than 1 and M is an integer. Optionally, the output end of the first stage shift register unit SR1 is electrically connected to the first fingerprint scanning line 10, and the output ends of the remaining stages of shift register units 401 are electrically connected to the remaining fingerprint scanning lines 10 through the or gate units 402, respectively. In fig. 11 of this embodiment, STV is a start shift signal, CKV1 and CKV2 are clock signals, Gin1, Gin2, Gin3, … …, Gin (M) are signals at the output terminals of the first to mth shift register units 401, and Gout1, Gout2, Gout3, … …, Gout (M) are scan driving signals output by the fingerprint identification driving circuit 40 and provided to the fingerprint scanning line 10. Through the fingerprint identification drive circuit 40 of above-mentioned connection structure, can realize providing drive scanning signal to two fingerprint scanning lines 10 at every turn, and include same fingerprint scanning line 10 in four fingerprint scanning lines 10 of adjacent twice drive scanning, make fingerprint identification unit 30 open with the form overlap of every two lines, realize the overlap drive to fingerprint identification unit 30 to the semaphore of fingerprint identification unit 30 has been increased, fingerprint identification's accuracy and detection effect have been improved.
It should be noted that, this embodiment is only an example of the connection structure of the fingerprint identification driving circuit 40, but is not limited to this structure, and the fingerprint identification driving circuit 40 may also be other connection structures capable of implementing the same or similar functions and effects of this embodiment, for example, optionally, M-1 or gate circuit units 402 in the fingerprint identification driving circuit 40 of this embodiment may be changed into a data selector (data selector) circuit controlled by a clock signal, which may implement the same function, and this embodiment is not described herein again.
Optionally, referring to fig. 12, fig. 12 is another timing diagram of the driving scan signals provided by the embodiment of the present invention, as can be seen from the timing diagram of the driving scan signals in the above embodiment, when the overlapped scanning driving method of the above embodiment provides the scan driving signals to the fingerprint identification units 30, the fingerprint identification driving circuit 40 cannot realize overlapping scan of the fingerprint identification units 30 in the first row and the fingerprint identification units 30 in the last row, so that in the present embodiment, by increasing the timing sequences of the driving scan signals output by the second working phase B and the third working phase C, through the change of the timing signals, it is compatible to realize that only the fingerprint identification units 30 in the first row are scanned during the first scan, and finally, only the fingerprint identification units 30 in the last row are scanned once again, so as to perfect the situation that the driving scan of the fingerprint identification units 30 in all rows cannot be realized in the first working phase a, therefore, the signal quantity of each line of fingerprint identification units 30 is further improved, the signal quantity after superposition scanning of each line of fingerprint identification units 30 can be uniformized, and the fingerprint identification accuracy and identification effect are further improved.
Optionally, please refer to fig. 13 and 14, fig. 13 is a schematic plane structure diagram of another fingerprint identification module according to an embodiment of the present invention, fig. 14 is a timing diagram of a scan signal corresponding to the fingerprint identification driving circuit of fig. 13, as can be seen from the timing diagram of the scan signal in the above embodiment, when the overlapped scan driving method of the above embodiment provides the scan driving signal to the fingerprint identification unit 30, the fingerprint identification driving circuit 40 cannot perform overlapped scan on the fingerprint identification units 30 in the first row, so the fingerprint identification module 100 of the present embodiment includes M-1 fingerprint scan lines 10, where M is greater than or equal to 2 and is an integer;
the fingerprint identification driving circuit 40 includes M cascaded Shift Register (SR) units 401 and M-1 or gate (or gate) circuit units 402, two input ends of an mth or gate circuit unit 402 are respectively electrically connected to output ends of the mth shift register unit 401 and the (M + 1) th shift register unit 401, an output end of the mth or gate circuit unit 402 is electrically connected to the mth fingerprint scanning line 10, M is greater than or equal to 1 and is less than or equal to M-1, and M is an integer.
The present embodiment further explains the connection structure of the fingerprint identification driving circuit 40, which includes M cascaded shift register units 401(SR1, SR2, SR3, … …, SR (M)), M-1 OR gate units 402(OR1, OR1, OR2, OR3, … …, OR (M-1)), two input terminals of the mth OR gate unit 402 are electrically connected to the output terminals of the mth shift register unit 401 and the M +1 shift register unit 401, respectively, and the output terminal of the mth OR gate unit 402 is electrically connected to the mth fingerprint scanning line 10, where M is equal to OR greater than 1 and equal to M is equal to OR less than M-1 and M is an integer. The output end of the first stage shift register unit SR1 is dummy, and the output ends of the other stages of shift register units 401 are respectively and sequentially electrically connected to each fingerprint scanning line 10 through the or gate circuit unit 402 in a one-to-one correspondence manner. In fig. 14 of this embodiment, STV is a start shift signal of the fingerprint identification driving circuit 40, CKV1 and CKV2 are clock signals of the fingerprint identification driving circuit 40, Gin1, Gin2, Gin3, … …, Gin (M) are signals at output terminals of the first to mth shift register units 401, and Gout2, Gout3, … …, Gout (M) are scanning driving signals provided by the fingerprint identification driving circuit 40 to M-1 fingerprint scanning lines 10. Through the fingerprint identification driving circuit 40 with the connection structure, the output end of the first-stage shift register unit SR1 is nominal, even if the first-stage shift register unit SR1 is normally driven, the output end of the first-stage shift register unit SR1 is not connected with the first-row fingerprint identification unit 30, no scanning driving signal is provided for the first-row fingerprint identification unit 30, and the output end of the second-stage shift register unit SR2 is sequentially and electrically connected with the fingerprint identification units 30 in each row, so that overlapping driving scanning is performed on the fingerprint identification units 30 in each row, the signal quantity after overlapping scanning of the fingerprint identification units 30 in each row is further homogenized, and the accuracy and the identification effect of fingerprint identification are further improved.
In some optional embodiments, please refer to fig. 15 and 16 in combination, fig. 15 is a schematic plane structure diagram of another fingerprint identification module provided in an embodiment of the present invention, fig. 16 is a timing diagram of scan signals corresponding to the fingerprint identification driving circuit of fig. 15, in this embodiment, the fingerprint identification module 100 includes N fingerprint scan lines 10, where N is greater than or equal to 3 and is an integer;
the fingerprint identification driving circuit 40 comprises N-1 cascaded first shift register units 4011 and N-1 cascaded second shift register units 4012; the N-1 first shift register units 4011 and the N-1 second shift register units 4012 are respectively positioned at two ends of the fingerprint scanning line 10;
the first to the N-1 th fingerprint scanning lines 10 are respectively and correspondingly electrically connected with the first to the N-1 th stage first shift register units 4011, and the second to the N-1 th fingerprint scanning lines 10 are respectively and correspondingly electrically connected with the first to the N-1 th stage second shift register units 4012.
This embodiment further illustrates that the N-1 cascaded first shift register units 4011 and the N-1 cascaded second shift register units 4012 of the fingerprint identification driving circuit 40 are respectively located at two ends of the fingerprint scan lines 10 and electrically connected to the fingerprint scan lines 10, that is, the fingerprint identification module of this embodiment adopts a bilateral simultaneous driving mode for the rest of the fingerprint scan lines 10 except for the unilateral driving mode for the first fingerprint scan line 10 and the last fingerprint scan line 10, and the fingerprint identification driving circuit 40 provides scanning driving signals to the fingerprint scan lines 10 at two ends of the fingerprint scan lines 10 at the same time, so that the charging time of the scanning driving can be reduced, and the scanning driving efficiency can be improved.
The present embodiment further explains the connection structure of the fingerprint identification driving circuit 40, which includes N-1 cascaded first shift register units 4011(SR _ L1, SR _ L2, SR _ L3, … …, SR _ L (N-1)) and N-1 cascaded second shift register units 4012(SR _ R1, SR _ R2, SR _ R3, … …, SR _ R (N-1)); the N-1 first shift register units 4011 and the N-1 second shift register units 4012 are respectively positioned at two ends of the fingerprint scanning line 10; the first to the N-1 th fingerprint scanning lines 10 are respectively and correspondingly electrically connected with the first to the N-1 th stage first shift register units 4011, and the second to the N-1 th fingerprint scanning lines 10 are respectively and correspondingly electrically connected with the first to the N-1 th stage second shift register units 4012. It should be noted that, the timing diagram of the scan signals corresponding to the fingerprint identification driving circuit 40 of this embodiment is shown in fig. 16, STV _ L is the start shift signal of N-1 first shift register units 4011, CKV _ L1 and CKV _ L2 are the clock signals of N-1 first shift register units 4011, Gout _ L1, Gout _ L2, Gout _ L3, … … and Gout _ L (N-1) are the scan driving signals output by N-1 first shift register units 4011 and provided to the first to (N-1) th fingerprint scan lines 10, STV _ R is the start shift signal of N-1 second shift register units 4012, CKV _ R1 and CKV _ R2 are the clock signals of N-1 second shift register units 4012, Gout _ R1, Gout _ R2, Gout _ R3, … … and Gout _ R (N-1) are the clock signals output by N-1 second shift register units 4012 and provided to the second shift register units 4012 The nth fingerprint scanning line 10. Through the fingerprint identification drive circuit 40 of above-mentioned connection structure, can realize providing drive scanning signal to two fingerprint scanning lines 10 at every turn, and include same fingerprint scanning line 10 in four fingerprint scanning lines 10 of adjacent twice drive scanning, make fingerprint identification unit 30 open with the form overlap of every two lines, realize the overlap drive to fingerprint identification unit 30 to the semaphore of fingerprint identification unit 30 has been increased, fingerprint identification's accuracy and detection effect have been improved.
In some optional embodiments, please refer to fig. 17 and 18, fig. 17 is a schematic plane structure diagram of another fingerprint identification module according to an embodiment of the present invention, fig. 18 is a timing diagram of scan signals corresponding to the fingerprint identification driving circuit of fig. 17, in this embodiment, the start shift signal STV and the clock signal CKV of the first shift register unit 4011 and the second shift register unit 4012 are synchronous.
This embodiment further defines that the start shift signal STV and the clock signal CKV of both the first shift register unit 4011 and the second shift register unit 4012 at both ends of the fingerprint scan line 10 are synchronous, that is, the first shift register unit 4011 and the second shift register unit 4012 share one start shift signal STV and one CKV clock signal, as shown in fig. 17 and fig. 18, where STV is the start shift signal of the fingerprint identification driving circuit 40, CKV1 and CKV2 are the clock signals of the fingerprint identification driving circuit 40, Gout1, Gout2, Gout3, … …, Gout (N) are the scan driving signals output by the fingerprint identification driving circuit 40 and provided to N fingerprint scan lines 10, so that the first shift register unit 4011 and the second shift register unit 4012 can start scanning at the same time, signal transmission is synchronous, overlap driving of the fingerprint identification unit 30, the signal quantity of the fingerprint identification unit 30 is increased, and the fingerprint identification accuracy and detection effect are improved.
Optionally, referring to fig. 19, fig. 19 is another timing diagram of the driving scan signals provided by the embodiment of the present invention, as can be seen from the timing diagram of the driving scan signals in the above embodiment, when the overlapped scanning driving method of the above embodiment provides the scan driving signals to the fingerprint identification units 30, the fingerprint identification driving circuit 40 cannot realize overlapping scan of the fingerprint identification units 30 in the first row and the fingerprint identification units 30 in the last row, so that in the present embodiment, by increasing the timing sequences of the driving scan signals output by the second working phase B and the third working phase C, through the change of the timing signals, it is compatible to realize that only the fingerprint identification units 30 in the first row are scanned during the first scan, and finally, only the fingerprint identification units 30 in the last row are scanned once again, so as to perfect the situation that the driving scan of the fingerprint identification units 30 in all rows cannot be realized in the first working phase a, therefore, the signal quantity of each line of fingerprint identification units 30 is further improved, the signal quantity after superposition scanning of each line of fingerprint identification units 30 can be uniformized, and the fingerprint identification accuracy and identification effect are further improved.
Optionally, please refer to fig. 20 and 21, fig. 20 is a schematic plane structure diagram of another fingerprint identification module according to an embodiment of the present invention, fig. 21 is a timing diagram of a scan signal corresponding to the fingerprint identification driving circuit of fig. 20, as can be seen from the timing diagram of the scan signal in the above embodiment, when the overlapped scan driving method of the above embodiment provides the scan driving signal to the fingerprint identification unit 30, the fingerprint identification driving circuit 40 cannot perform overlapped scanning on the fingerprint identification unit 30 in the first row and the fingerprint identification unit 30 in the last row, so in this embodiment of the present embodiment, the fingerprint identification module 100 includes N-1 fingerprint scanning lines 10, and N is greater than or equal to 3 and is an integer;
the fingerprint identification driving circuit 40 includes N cascaded first shift register units 4011 and N cascaded second shift register units 4012; except the output end of the first-stage first shift register unit 4011 in the N first shift register units 4011, the rest N-1 first shift register units 4011 are sequentially and correspondingly electrically connected with one end of the N-1 fingerprint scanning lines 10, except the output end of the last-stage second shift register unit 4012 in the N second shift register units 4012, the rest N-1 second shift register units 4012 are sequentially and correspondingly electrically connected with the other end of the N-1 fingerprint scanning lines 10; the fingerprint identification module of this embodiment is except that the mode that is unilateral drive to first fingerprint scan line 10 and last fingerprint scan line 10 adoption, all adopts the mode that bilateral simultaneous drive to remaining fingerprint scan line 10, and fingerprint identification drive circuit 40 provides scanning drive signal to fingerprint scan line 10 simultaneously at the both ends of fingerprint scan line 10 to can reduce scanning drive's charge time, improve scanning drive efficiency.
The present embodiment further explains the connection structure of the fingerprint identification driving circuit 40, which includes N cascaded first shift register units 4011(SR _ L1, SR _ L2, SR _ L3, … …, SR _ L (N)) and N cascaded second shift register units 4012(SR _ R1, SR _ R2, SR _ R3, … …, SR _ R (N)); the N first shift register units 4011 and the N second shift register units 4012 are respectively located at two ends of the fingerprint scan line 10; except the output end nominal of the first shift register unit 4011 at the first stage in the N first shift register units 4011, the rest N-1 first shift register units 4011 are sequentially and correspondingly electrically connected with one end of the N-1 fingerprint scanning lines 10, except the output end nominal of the second shift register unit 4012 at the last stage in the N second shift register units 4012, the rest N-1 second shift register units 4012 are sequentially and correspondingly electrically connected with the other end of the N-1 fingerprint scanning lines 10. It should be noted that, the timing diagram of the scan signals corresponding to the fingerprint identification driving circuit 40 of the present embodiment is shown in fig. 21, STV is the start shift signal of the fingerprint identification driving circuit 40, CKV1 and CKV2 are the clock signals of the fingerprint identification driving circuit 40, Gout1, Gout2, Gout3, … … and Gout (N-1) are the scan driving signals output by the fingerprint identification driving circuit 40 and provided to N-1 fingerprint scanning lines 10. Through the fingerprint identification driving circuit 40 with the connection structure, the output end of the first-stage first shift register unit SR _ L1 is nominal, and the output end Gout of the last-stage second shift register unit SR _ RN is nominal, so that the fingerprint identification units 30 in each row are subjected to overlapping driving scanning, the signal quantity after the fingerprint identification units 30 in each row are subjected to overlapping scanning is further homogenized, and the fingerprint identification accuracy and the fingerprint identification effect are further improved.
In some optional embodiments, please refer to fig. 22, where fig. 22 is a schematic structural diagram of a display device 111 according to an embodiment of the present invention, and the display device 111 according to this embodiment includes a display panel and the fingerprint identification module 100 according to the above embodiment of the present invention. Optionally, the fingerprint identification module 100 of this embodiment may be located in the entire display area of the display device 111, and is used for the entire fingerprint identification (as shown in fig. 22) of the display device 111, or may be located only in a partial display area of the display device 111 (for example, located only in the lower half screen or the upper half screen of the display device 111, which is not shown in the figure) and is used for the local fingerprint identification of the display device 111, and during the specific implementation, the fingerprint identification module may be designed according to the actual situation. The embodiment of fig. 22 is only an example of a mobile phone, and the display device 111 is described, it is understood that the display device 111 provided in the embodiment of the present invention may be another display device 111 having a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device 111 provided in the embodiment of the present invention has the beneficial effects of the fingerprint identification module 100 provided in the embodiment of the present invention, and specific descriptions of the fingerprint identification module 100 in the above embodiments may be specifically referred to, and this embodiment is not described herein again.
In some optional embodiments, please refer to fig. 23, fig. 23 is a schematic structural diagram of another display device 111 according to an embodiment of the present invention, in which the display device 111 further includes at least one notch 200, and the fingerprint identification module 100 is located in the notch 200.
The embodiment further illustrates that the display device 111 occupies the ratio for the better screen that improves the display device 111, so that the display effect is more prominent, the display device 111 is designed to have a gap 200 with a smaller area (the position and the shape of the gap 200 can be set according to actual requirements), and the position of the gap 200 is used for placing the fingerprint identification module 100 of the embodiment, so that the fingerprint identification module 100 does not occupy the display area of the display device 111, and the improvement of the screen occupation ratio is more facilitated. Because the occupied area of fingerprint identification module 100 is less, the semaphore that leads to fingerprint identification is very little, and is more difficult to discern, consequently through the overlap formula scanning drive method of fingerprint identification module 100 that above-mentioned embodiment provided, can realize the overlap drive to fingerprint identification unit in fingerprint identification module 100 to fingerprint identification's semaphore has been increased, fingerprint identification's accuracy and detection effect have been improved.
According to the embodiment, the driving method and the display device of the fingerprint identification module at least achieve the following beneficial effects:
the fingerprint identification device provides a driving voltage signal to the fingerprint identification unit through the fingerprint scanning lines and the fingerprint signal lines, so that the fingerprint identification unit finishes fingerprint identification and detection work, is electrically connected with each fingerprint scanning line through the fingerprint identification driving circuit, and provides a driving scanning signal to the same row of fingerprint identification units through the same fingerprint scanning line, so that the driving of the fingerprint identification unit array is realized, the fingerprint identification is finished, and then the fingerprint identification result is transmitted to the fingerprint detection result receiving unit through the fingerprint signal lines. Further, at least one fingerprint scanning line is included in the fingerprint scanning lines of two adjacent driving scans, namely, in the same scanning period, the fingerprint identification driving circuit has a process of repeatedly providing a driving scanning signal for a certain fingerprint scanning line, the overlapped scanning driving mode is adopted, equivalently, the fingerprint identification units repeatedly scanned in the second direction are connected together, the area of the fingerprint identification units is increased, the signal quantity of the fingerprint identification units is increased, and the fingerprint identification accuracy and the detection effect are improved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (6)
1. A driving method of a fingerprint identification module is characterized in that the fingerprint identification module comprises N fingerprint scanning lines, a plurality of fingerprint signal lines, a plurality of fingerprint identification units and a fingerprint identification driving circuit, wherein N is more than or equal to 3 and is an integer; the fingerprint scanning lines and the fingerprint signal lines are crossed and insulated to define areas where a plurality of fingerprint identification units are located, the fingerprint identification units in the same row are electrically connected with the same fingerprint scanning line, and the fingerprint identification driving circuit is electrically connected with the fingerprint scanning line;
the fingerprint identification driving circuit comprises N-1 cascaded first shift register units and N-1 cascaded second shift register units; the N-1 first shift register units and the N-1 second shift register units are respectively positioned at two ends of the fingerprint scanning line;
the first to the N-1 th fingerprint scanning lines are respectively and correspondingly electrically connected with the first shift register units from the first stage to the N-1 st stage, and the second to the N-1 th fingerprint scanning lines are respectively and correspondingly electrically connected with the second shift register units from the first stage to the N-1 st stage;
the driving method at least comprises a first working phase, wherein in the first working phase, along the extension direction of the fingerprint signal lines, the fingerprint identification driving circuit provides driving scanning signals to at least two fingerprint scanning lines at each time, at least four fingerprint scanning lines of two adjacent driving scanning comprise at least one same fingerprint scanning line, the fingerprint identification units are overlapped and started in a mode of at least one line, and the fingerprint identification units are overlapped and driven.
2. The driving method of fingerprint recognition module of claim 1,
in one scanning period, the driving method further comprises a second working phase and a third working phase, wherein the first working phase is positioned between the second working phase and the third working phase;
in the second working phase, the fingerprint identification driving circuit only provides a driving scanning signal for the first fingerprint scanning line;
in the third working phase, the fingerprint identification driving circuit only provides a driving scanning signal for the last fingerprint scanning line.
3. The driving method of fingerprint recognition module of claim 1,
fingerprint identification module is capacitanc fingerprint identification module or optical type fingerprint identification module.
4. The method for driving a fingerprint recognition module of claim 1, wherein the start shift signal and the clock signal of both the first shift register unit and the second shift register unit are synchronous.
5. A display device, comprising a display panel and the fingerprint recognition module of any one of claims 1-4.
6. The display device according to claim 5, further comprising at least one notch, wherein the fingerprint identification module is located in the notch.
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| CN110008883B (en) * | 2019-03-28 | 2021-06-18 | 厦门天马微电子有限公司 | Display panel and display device |
| CN113227889B (en) * | 2019-09-04 | 2023-11-03 | 京东方科技集团股份有限公司 | Grain recognition device and display device |
| CN110715792B (en) * | 2019-10-30 | 2021-11-19 | 厦门天马微电子有限公司 | Display panel, test method and tool thereof and display device |
| CN110796124B (en) * | 2019-11-27 | 2022-07-01 | 厦门天马微电子有限公司 | Display panel driving method and display device |
| CN113158742B (en) * | 2021-01-29 | 2024-02-02 | 合肥维信诺科技有限公司 | Fingerprint identification circuit, driving method thereof and fingerprint identification equipment |
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