CN109325384A - Cell type optical identification of fingerprint shows equipment - Google Patents
Cell type optical identification of fingerprint shows equipment Download PDFInfo
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- CN109325384A CN109325384A CN201710636966.8A CN201710636966A CN109325384A CN 109325384 A CN109325384 A CN 109325384A CN 201710636966 A CN201710636966 A CN 201710636966A CN 109325384 A CN109325384 A CN 109325384A
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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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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The present invention proposes that a kind of cell type optical identification of fingerprint shows equipment comprising an at least light source, a light guide plate, a tft layer and a touch-control sensing and shared electrode layer.The radiation direction of a light guide plate guiding at least light source.Tft layer is located at the side of the light guide plate, has several pixel circuits, several photosensitive circuits, several scan lines and several data lines, and several scan lines and several data lines are arranged according to the first, second direction.Touch-control sensing and shared electrode layer are located at the side back to the light guide plate of tft layer, it has several transparent sensing electrode blocks, several transparent sensing electrode blocks are arranged according to first and second direction, wherein, several photosensitive circuits receive the reflected light of an at least light source, to generate an optical finger print image.
Description
Technical field
The present invention relates to the technical field of identification of fingerprint, espespecially a kind of cell type optical identification of fingerprint shows equipment.
Background technique
The competition of mobile phone market.Therefore many functions have been added in Cell Phone Design, such as touch detection, fingerprint
The functions such as identification.Simultaneously in order to reduce the thickness of mobile phone and reduce assembly program, existing mobile phone mainly uses embedded touch skill
Art (in-cell touch detection technology).Fig. 1 is the schematic diagram of an existing mobile phone 100.As shown, its
With an identification of fingerprint module 110 and a Touch Screen 120.Due to placed identification of fingerprint module 110 in mobile phone front, and make
The region that the Touch Screen 120 of mobile phone can be shown becomes smaller.
In Cell Phone Design, to show more information, mobile phone display screen curtain is towards high screen accounting.Simultaneously in order in mobile phone
Fingerprint identification system or camera are placed in front, and Touch Screen 120 needs to carry out special-shaped cutting to place relevant component.Fig. 2 is
The schematic diagram of another existing mobile phone 200.In order to accommodate identification of fingerprint module 110, abnormal shape can be carried out to mobile phone display screen curtain 220 and cut
It cuts, to hollow out one piece of region in display screen 220, as shown in the dotted-line ellipse in Fig. 2.However display screen 220 is carried out different
When type is cut, need to display screen associated component (such as substrate, light guide plate, tft layer ..., protection glass etc.) into
The special-shaped cutting of row, this increases many processing programs, while also increasing the degree of difficulty of assembling, and then greatly improve cost.Therefore,
Existing cell type optical identification of fingerprint shows that equipment still has improved space in fact.
Summary of the invention
The purpose of the present invention is mainly providing a kind of cell type optical identification of fingerprint display equipment, is in liquid crystal display
The identification of equipment shows that several photosensitive circuits are arranged in equipment tft layer, to carry out identification of fingerprint operation, can allow same
Panel has the function of display, touch detection and three kinds of identification of fingerprint.Since panel does not need special-shaped cutting, panel yield at
Originally it can reduce again.It does not need additionally to prepare identification of fingerprint component again simultaneously, cost can be reduced and simplifies material keyholed back plate.And
Finger print identification function can be integrated into panel because not needing special-shaped cutting, so aperture is not required on Cell Phone Design, Ke Yizeng
Add waterproofness.
A characteristic according to the present invention, the present invention propose that a kind of cell type optical identification of fingerprint shows equipment comprising extremely
A few light source, a light guide plate, a tft layer and a touch-control sensing and shared electrode layer.The light guide plate guides this at least
The radiation direction of one light source.The tft layer is located at the side of the light guide plate, have several pixel circuits, several
Photosensitive circuit, several scan lines and several data lines, several scan lines are arranged according to a first direction, this is several
Data line is arranged according to a second direction.The touch-control sensing and shared electrode layer be located at the tft layer back to this
The side of light guide plate, has several transparent sensing electrode blocks, several transparent sensing electrode blocks be according to this
One direction and second direction setting, wherein several photosensitive circuits receive the reflected light of an at least light source, to generate one
Optical finger print image.
Cell type optical identification of fingerprint shows equipment, further includes: an optical collimator, positioned at the back of several photosensitive circuits
For the corresponding section of the side of the light guide plate, the advance of the reflected light is assisted to reach parallel straight.
Cell type optical identification of fingerprint shows equipment, further includes: a reflecting plate, positioned at the light guide plate back in the film
The side of transistor layer, the light exported with reflective portion from the light guide plate；One diffuser plate, positioned at the light guide plate to face this thin
The side of film transistor layer；One back side brightness enhancement film, positioned at the side for facing the tft layer of the diffuser plate；And one
Front brightness enhancement film, positioned at the side for facing the tft layer of the back side brightness enhancement film.
Cell type optical identification of fingerprint shows equipment, further includes: a cover board；One light shield layer, positioned at the cover board relative to
The same side of tft layer, the light shield layer have most shading lines；And a chromatic filter layer, positioned at the light shield layer
Between the most shading lines and surface of most shading lines.
Cell type optical identification of fingerprint shows equipment, further includes: each scan line and each scan-line data line are handed over
The place of connecing is provided with a pixel circuit or a photosensitive circuit.
The pixel circuit include a thin film transistor (TFT) and a capacitor, the photosensitive circuit include a thin film transistor (TFT),
One capacitor and a light sensitive diode.
Cell type optical identification of fingerprint shows equipment, and further include: a fingerprint and scan drive circuit are connected to this several
Scan line, sequentially or at random to open the corresponding pixel circuit of a scan line or the photosensitive electricity in several scan lines
Road；And
One display, touch-control and optical finger print control circuit, are connected to the fingerprint and scan drive circuit and several numbers
According to line.
The it has been shown that, touch-control and optical finger print control circuit include: a multi-task unit, have several multiplexers, often
One multiplexer has a first end, a second end and a third end, which is connected to one in several data lines
Respective data lines；One display driver element is connected to the second end of each multiplexer, will show that data are more via this
TU task unit and several data lines and be written to corresponding pixel circuit；And one optical finger print driving and sensing unit,
It is connected to the third end of each multiplexer, initial voltage is write via the multi-task unit and several data lines
Enter to the corresponding photosensitive circuit or reads in the corresponding photosensitive circuit via the multi-task unit and several data lines
Induced voltage.
The it has been shown that, touch-control and optical finger print control circuit further include: a shared electrode and touch-control sensing unit are connected to this
Several touch-control sensing electrode blocks of this of touch-control sensing and shared electrode layer so that several transparent sensing electrode blocks into
Row self-capacitance touch detection makes several touch-control sensing electrode blocks provide a common voltage to carry out display operation；With
And a control unit, it is connected to that the multi-task unit, the display driver element, optical finger print driving and sensing unit, this is total
Electrode and touch-control sensing unit and the fingerprint and scan drive circuit are enjoyed, operated with one display operation of offer, a touch detection,
Or one identification of fingerprint operation correlation timing and control signal.
The priority of touch detection operation is higher than the priority of the display operation and the priority of identification of fingerprint operation,
The priority of the display operation is identical with the priority that the identification of fingerprint operates.
The tft layer further includes: several fingerprint data lines, is arranged according to the second direction, wherein if should
Each scan line of dry scan line and each data line junction of several data lines are provided with a picture element electricity
Each fingerprint data line junction of road, each scan line and several fingerprint data lines is provided with a photosensitive electricity
Road.
The tft layer further includes: several finger scan lines, is arranged according to the first direction；And several
Fingerprint data line, this is arranged according to the second direction, wherein each scan line of several scan lines and this several
Each data line junction of data line is provided with a pixel circuit, and each fingerprint of several finger scan lines is swept
The each fingerprint data line junction for retouching line and several fingerprint data lines is provided with a photosensitive circuit.
Further, which is comprising the polaroid with optically focused micro-structure.
Further, which is to be located at a light shield layer, which is to face film crystalline substance positioned at a cover board
The side of body tube layer, the light shield layer are made of a most shading lines, which uses phase with the majority bar shading line
It is made with light shield.
Further, which be located in a chromatic filter layer, and the optical collimator and the chromatic filter layer use
Identical light shield is made.
Further, which is for by several liquid crystal picture elements for being located at several photosensitive circuit corresponding sections
It is constituted.
Further, which is for cold cathode fluorescent tube light source, thermic cathode fluorimetric pipe light source or light-emitting diodes
Pipe light source.
Further, this at least a light source further includes infrared ray or visible light source.
In the present invention, several photosensitive circuits are set in the tft layer, it, can to carry out identification of fingerprint operation
Same panel is allowed to have the function of display, touch detection and three kinds of identification of fingerprint.Since panel does not need special-shaped cutting, panel is good
Rate can reduce again with cost.It does not need additionally to prepare identification of fingerprint component again simultaneously, cost can be reduced and simplifies material
Keyholed back plate.And finger print identification function can be integrated into panel because not needing special-shaped cutting, so being not required to additionally carry out component
Aperture process can increase the waterproofness of end product, such as mobile phone.
Detailed description of the invention
Fig. 1 is the schematic diagram of an existing mobile phone.
Fig. 2 is the schematic diagram of another existing mobile phone.
Fig. 3 is the diagrammatic cross-section that cell type optical identification of fingerprint of the invention shows equipment.
Fig. 4 is tft layer of the invention, fingerprint and scan drive circuit and display, touch-control and optical finger print control
One embodiment schematic diagram of circuit processed.
Fig. 5 is the block diagram of display of the invention, touch-control and optical finger print control circuit.
Fig. 6 is the schematic diagram of photosensitive circuit of the invention, multiplexer and fingerprint sensing signal detecting circuit.
Fig. 7 is the time diagram of photosensitive circuit of the invention, multiplexer and fingerprint sensing signal detecting circuit.
Fig. 8 is tft layer of the invention, fingerprint and scan drive circuit and display, touch-control and optical finger print control
Another embodiment schematic diagram of circuit processed.
Fig. 9 is the block diagram of the display of Fig. 8 of the present invention, touch-control and optical finger print control circuit.
Figure 10 is tft layer of the invention, fingerprint and scan drive circuit and display, touch-control and optical finger print control
The another embodiment schematic diagram of circuit processed.
Figure 11 is the corresponding timing diagram of Figure 10 of the present invention.
Figure 12 is a schematic diagram of light guide plate of the present invention.
Figure 13 is a schematic diagram of optical collimator of the invention.
Figure 14 is another schematic diagram of optical collimator of the invention.
Figure 15 is the another schematic diagram of optical collimator of the invention.
Figure 16 is another schematic diagram of optical collimator of the invention.
Figure 17 is the use schematic diagram that cell type optical identification of fingerprint of the present invention shows equipment.
Detailed description of the invention
100 identification of fingerprint module 110 of mobile phone
120 mobile phone 200 of Touch Screen
220 cell type optical identification of fingerprint of mobile phone display screen curtain shows equipment 300
305 reflecting plate 310 of supporting layer
315 light guide plate 320 of light source
325 back side brightness enhancement film 330 of diffuser plate
The lower polarizing layer 340 of front brightness enhancement film 335
345 display material layer 350 of tft layer
Touch-control sensing and 355 chromatic filter layer 360 of shared electrode layer
365 cover board 370 of light shield layer
375 shading line 3651 of optical collimator
3551 photosensitive circuit 440 of induction electrode block
Fingerprint and the display of scan drive circuit 410, touch-control and optical finger print control circuit 420
430 data line 460 of pixel circuit
450,451,453 thin film transistor (TFT) 431,441 of scan line
433,443 light sensitive diode 445 of capacitor
The display of multi-task unit 510 driving single 520
Optical finger print driving and 530 shared electrode of sensing unit and touch-control sensing unit 540
550 multiplexer 511 of control unit
First end a second end b
Third end c initial voltage Vini
Common voltage Vcom fingerprint sensing signal detecting circuit 531
610 capacitor 620 of switch
Operational amplifier 630 resets signal Reset
Scan the voltage Vc of signal Scan capacitor 443
810 finger scan line 1010 of fingerprint data line
1020 fingerprint driving circuit 1040 of finger print data line
1030 period of scan drive circuit T1~T7
Line segment BB ' polaroid 1310
1311 region A of optically focused micro-structure
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 3 is the diagrammatic cross-section that cell type optical identification of fingerprint of the invention shows equipment 300.The cell type optical refers to
Line identification display equipment 300 include a supporting layer (Bezel) 305, one reflecting plate (Reflector) 310, at least one light source 315,
One light guide plate (Light Guide Plate) 320, one diffuser plate (Diffuser), 325, one back side brightness enhancement film (Rear Bright
Enhancement Film, RBEF) 330, one front brightness enhancement film (Front Bright Enhancement Film, FBEF)
335, once polarizing layer 340, a tft layer 345, a display material layer 350, a touch-control sensing and shared electrode layer
355, a chromatic filter layer (Color Filter, CF) 360, one light shield layer (Black Matrix, BM) 365, one cover board 370,
An and optical collimator (Collimator) 375.
An at least light source 315 is located at a side of the light guide plate 320, to provide irradiation.The light guide plate 320 guides this extremely
The radiation direction of a few light source 315.
The reflecting plate 310 is located on supporting layer 305 and positioned at the light guide plate 320 back in the tft layer 345
Side, the light which leaks out is reflected back in the light guide plate 320, prevents this at least outside the light of a light source 315
Leakage.The diffuser plate 325 is located at the side for facing the tft layer 345 of the light guide plate 320, by the light guide plate 320
The light of output forms a uniform area source.
The back side brightness enhancement film 330 is located at the side for facing the tft layer 345 of the diffuser plate 325, with blast
The area source of the diffuser plate 325 output.What brightness enhancement film 335 was located at the back side brightness enhancement film 330 before this faces the film crystal
The side of tube layer 345, the area source exported with the blast diffuser plate 325.
The lower polarizing layer 340 is located at the side for facing the tft layer 345 of brightness enhancement film 335 before this, will
The non-polarized area source that brightness enhancement film 335 exports before this is changed into polarization area source.
The tft layer 345 is located at the side of the light guide plate 320, has several pixel circuits, several senses
Optical circuit, several scan lines and several data lines (being shown in Fig. 4).Several photosensitive circuits receive an at least light source
315 reflected light, to generate an optical finger print image.
The display material layer 350 be located at the tft layer 345 back in the side of the light guide plate 320.The display
The material of material layer 350 can be liquid crystal.
The touch-control sensing and shared electrode layer 355 be located at the tft layer 345 back to the one of the light guide plate 320
Side, have several touch-control sensing electrode blocks 3551, several touch-control sensing electrode blocks 3551 be according to this first
Direction and second direction setting.Wherein can be with touch-control sensing electrode block 3551 it is transparent or close to transparent material, and can
To carry out touch detection.
The light shield layer 365 is located at the side for facing tft layer 345 of the cover board 370, which has
Most shading lines 3651.The majority shading line 3651 is to arrange in a matrix fashion, this is to be familiar with liquid crystal display technology
Personnel known to, therefore be no longer described in detail.The chromatic filter layer 360 is located between most shading lines 3651 of the light shield layer 365
And the surface of most shading lines 3651.
The optical collimator 375 is located at the corresponding section back to the side in the light guide plate 320 of several photosensitive circuits, with
The advance of the reflected light is assisted to reach parallel straight.The optical collimator 375 is to be located at the reflected light to reach several photosensitive circuits
Light path on.The optical collimator (Collimator) can be located at tft layer 345, light shield layer (BM) 365, colorized optical filtering
Layer (CF) 360 or display material layer 350.
The cell type optical identification of fingerprint show equipment 300 further include a fingerprint and scan drive circuit 410 and a display,
Touch-control and optical finger print control circuit 420 and tft layer 345, as shown in Figure 4.If the tft layer 345 has
Dry pixel circuit 430, several photosensitive circuits 440, several scan lines 450 and several data lines 460, this several are swept
Retouching line 450 is arranged according to a first direction (Y direction), which is that (X is arranged according to a second direction
Axis direction) setting.
Each scan line 450 and 460 junction of each data line are provided with a pixel circuit 430 or a sense
Optical circuit 440.Wherein, each pixel circuit 430 includes a thin film transistor (TFT) 431 and a capacitor 433, each is photosensitive
Circuit 440 includes 441, capacitors 443 of a thin film transistor (TFT) and a light sensitive diode 445.
As shown in figure 4, scan line 451 is connected to several thin film transistor (TFT)s 431, it is to carry out simple display operation.
Scan line 453 is connected to several thin film transistor (TFT)s 431 and several thin film transistor (TFT)s 441, then is to carry out display operation
And identification of fingerprint operation.
The fingerprint and scan drive circuit 410 are connected to several scan lines 450, several sequentially or at random to open this
Pixel circuit 430 or photosensitive circuit 440 corresponding to a scan line in scan line 450.The it has been shown that, touch-control and optical finger print
Control circuit 420 is connected to the fingerprint and scan drive circuit 410 and several data lines 460.As shown in figure 4, photosensitive electricity
Road 440 and pixel circuit 430 make together, therefore photosensitive circuit 440 may be provided in display area.
Fig. 5 is the block diagram of display of the invention, touch-control and optical finger print control circuit 420.As shown in figure 5, the display,
It includes that a multi-task unit 510, one display drives single 520, one optical finger print to drive that touch-control and optical finger print control circuit, which include 420,
Dynamic and sensing unit 530, a shared electrode and touch-control sensing unit 540 and a control unit 550.
The multi-task unit 510 has several multiplexers 511, and each multiplexer 511 has a first end a, one
Second end b and a third end c, first end a are connected to a respective data lines 460 in several data lines.The display
Driving unit 520 is connected to the second end b of each multiplexer 511, will show data via the multi-task unit 510 and be somebody's turn to do
Several data lines 460 and be written to corresponding pixel circuit 430.
Optical finger print driving is connected to the third end c of each multiplexer 511 with sensing unit 530, initial by one
Voltage Vini is written via the multi-task unit 510 and several data lines 460 to corresponding photosensitive circuit 440 or warp
An induced voltage of corresponding photosensitive circuit 440 is read in by the multi-task unit 510 and several data lines 460.
The shared electrode and touch-control sensing unit 540 be connected to the touch-control sensing and shared electrode layer 355 several thoroughly
Bright induction electrode block 3551, so that several transparent sensing electrode blocks 3551 carry out e.g. self-capacitance (self-
Capacitance) formula touch detection or make several touch-control sensing electrode blocks 3551 provide a common voltage Vcom with into
Row display operation.
By the touch-control sensing and shared electrode layer 355 is cut, several touch-control sensing electrode blocks 3551 can be formed,
And e.g. self-capacitance (self-capacitance) formula touching is carried out using several touch-control sensing electrode blocks 3551 and is detectd
It surveys, or when display operation, a common voltage is applied to several transparent sensing electrode blocks 3551, to allow this several
Touch-control sensing electrode block 3551 forms a common voltage layer, this is that the known operator can be complete based on contents of the present invention institute
At it will not go into details.
The control unit 550 be connected to the multi-task unit 510, the display driver element 520, the optical finger print driving with
Sensing unit 530, the shared electrode and touch-control sensing unit 540 and the fingerprint and scan drive circuit 410, it is aobvious to provide one
Show operation, the correlation timing of touch detection operation or identification of fingerprint operation and control signal.
Optical finger print driving and sensing unit 530 include a fingerprint sensing signal detecting circuit 531, to detect the sense
The fingerprint sensing signal that optical circuit 440 is sensed.Fig. 6 is photosensitive circuit 440 of the invention, multiplexer 511 and fingerprint sensing
The schematic diagram of signal detecting circuit 531.
Fingerprint sensing signal detecting circuit 531 includes a switch 610, a capacitor 620 and an operational amplifier 630.This is opened
The one end for closing 610 is connected to the anti-of the second end b of the multiplexer 511, one end of the capacitor 620 and the operational amplifier 630
Phase input terminal (-).The other end of the switch 610 is connected to the output of the other end and the operational amplifier 630 of the capacitor 620
End.One control terminal of the switch 610 is connected to a resetting signal Reset, and resetting signal Reset is by the control unit 550
It is produced.The non-inverting input (+) of the operational amplifier 630 is connected to a reference voltage Vref.The lock of thin film transistor (TFT) 441
Pole is connected to a scanning signal Scan, and scanning signal Scan is as produced by the fingerprint and scan drive circuit 410.
Fig. 7 is the timing of photosensitive circuit 440 of the invention, multiplexer 511 and fingerprint sensing signal detecting circuit 531
Schematic diagram.In Fig. 7, the voltage Vc of solid line is represented when not having finger on the photosensitive circuit 440, the voltage of the capacitor 443.Dotted line
Voltage Vc represent when having finger on the photosensitive circuit 440, the voltage of the capacitor 443.Fingerprint is carried out using the photosensitive circuit 440
Image detecting is that the known operator can be done based on the contents of the present invention, and it will not go into details.
Fig. 8 is tft layer 345 of the invention, fingerprint and scan drive circuit 410 and display, touch-control and optics
Another embodiment schematic diagram of fingerprint control circuit 420.The tft layer 345 has several pixel circuits 430, several
A photosensitive circuit 440, several scan lines 450, several data lines 460 and several fingerprint data lines 810, this several
Scan line 450 is arranged according to the first direction (Y direction), which is according to the second direction (X-axis
Direction) setting, which be arranged according to the second direction (X-direction).
As shown in figure 8, each scan line of several scan lines 450 and each of several data lines 460
Data line junction is provided with a pixel circuit 430, each scan line 450 and several fingerprint data lines 810
Each fingerprint data line junction is provided with a photosensitive circuit 440.
Also that is, in the fig. 4 embodiment, the photosensitive circuit 440 and the pixel circuit 430 share scan line 450 and data
Line 460, and in the embodiment in fig. 8, which only shares scan line 453 with the pixel circuit 430, the photosensitive electricity
Road 440 uses independent finger print data line 810.
Fig. 9 is the block diagram of the display of Fig. 8 of the present invention, touch-control and optical finger print control circuit 420.It is compared with Fig. 5, due to
The photosensitive circuit 440 uses independent finger print data line 810, therefore in Fig. 9, the display, touch-control and optical finger print control circuit
420 include display driving list 520, optical finger print driving and sensing unit 530, the shared electrode and touch-control sensing unit
540 and the control unit 550.
Figure 10 is tft layer 345 of the invention, fingerprint and scan drive circuit 410 and display, touch-control and optics
The another embodiment schematic diagram of fingerprint control circuit 420.The tft layer 345 has several pixel circuits 430, several
A photosensitive circuit 440, several scan lines 450, several data lines 460, several finger scan lines 1010 and several fingers
Texel data line 1020.Several scan lines 450 are arranged according to the first direction (Y direction), several data lines 460
It is to be arranged according to the second direction (X-direction).Several finger scan lines 1010 are set according to the first direction (Y direction)
It sets, which be arranged according to the second direction (X-direction).
As shown in Figure 10, each scan line of several scan lines 450 and each of several data lines 460
Data line junction is provided with a pixel circuit 430, each scan line of several finger scan lines 1010 and this is several
Each fingerprint data line junction of bar fingerprint data line 1020 is provided with a photosensitive circuit 440.
Also that is, in the embodiment in fig. 8, the photosensitive circuit 440 and the pixel circuit 430 share scan line 450, this is photosensitive
Circuit 440 uses independent data line 810.In the embodiment in figure 10, the photosensitive circuit 440 photosensitive circuit 440 uses only
Vertical finger scan line 1010 and finger print data line 1020.And it is routed for convenience, fingerprint and turntable driving in Figure 10 embodiment
Circuit can be divided into a fingerprint driving circuit 1040 and a scan drive circuit 1030.
The touch detection operation priority be above the display operation priority and the identification of fingerprint operation it is preferential
Power, the priority of the display operation be with the priority that the identification of fingerprint operates be identical.Figure 11 is that Figure 10 of the present invention is corresponding
Timing diagram.Wherein, as shown, carrying out display operation in period T1, which, which sequentially exports, opens signal
Capacitor 433 is written in order to by an image signal to open the corresponding thin film transistor (TFT) 431 of scan line 450 to scan line 450.Yu Shi
Section T2 carries out touch detection operation, since the priority of touch detection operation is higher than the priority of the display operation, first
Suspend display operation, and carries out touch detection operation.It is also such in period T3, T5, T4, T6.Fingerprint is first carried out in period T7
Identification operation executes display operation after having executed identification of fingerprint operation again.Signal is opened in the fingerprint driving circuit 1040 output
Capacitor is written in order to by initial voltage to open the corresponding thin film transistor (TFT) 441 of finger scan line 1010 to finger scan line 1010
443, or read the induced voltage on capacitor 443.
Figure 12 is a schematic diagram of light guide plate 320 of the present invention.It as shown in figure 12, is to show that the cell type optical fingerprint is distinguished
Know sectional view of the display equipment 300 at line segment BB '.An at least light source 315 is located at a side of the light guide plate 320.This is led
Tabula rasa 320 guides and changes the radiation direction of an at least light source 315, shows equipment to provide the cell type optical identification of fingerprint
The irradiation of identification display equipment 300.
Light source 315 can be cold cathode fluorescent tube (CCFL) light source, thermic cathode fluorimetric pipe light source or light emitting diode
(LED) light source, to provide the irradiation that the cell type optical identification of fingerprint shows equipment identification display equipment 300.It also provides simultaneously
The irradiation of the photosensitive circuit 440.That is, this can generate a reflected light, the photosensitive circuit when at least a light source 315 shines a finger
440 receive the reflected light of an at least light source 315, to generate an optical finger print image.
When carrying out identification of fingerprint operation, if finger has dirty or grease, it is seen that light is easy to be absorbed, therefore this is photosensitive
The optical finger print image that circuit 440 obtains is often incomplete uneven.Therefore, the light source other than visible wavelength can be used, to obtain
Preferable optical finger print image.In an embodiment, light source further includes infrared light sources 317, in order to the preferable optical finger print of acquisition
Image.
Optical collimator 375 is to be located at the reflected light to reach on the light path of several photosensitive circuits 440, to assist this anti-
The advance for penetrating light reaches parallel straight, in order to diverging when avoiding the reflected light travels, leads to light energy losses.Figure 13 is of the invention
One schematic diagram of optical collimator 375.As shown in figure 13, which is inclined comprising one with optically focused micro-structure 1311
Mating plate 1310, with allow reflected light can straight parallel enter up to several photosensitive circuits 440.
Figure 14 is another schematic diagram of optical collimator 375 of the invention.As shown in figure 14, which is to be located at
The light shield layer (BM) 365, the light shield layer 365 are positioned at the side for facing tft layer 345 of cover board 370, the shading
Layer 365 is made of a most shading lines 3651, the optical collimator 375 light shield identical as 3651 use of majority shading line
It is made.
Figure 15 is the another schematic diagram of optical collimator 375 of the invention.As shown in figure 15, which is to be located at
In one chromatic filter layer (CF) 360, which same process can be used to make with the chromatic filter layer 360, Yi Jili
Relevant design is hindered with RGB color, carries out the optical collimator 375 design.
Figure 16 is another schematic diagram of optical collimator 375 of the invention.As shown in figure 16, which is to serve as reasons
Several liquid crystal picture elements positioned at several 440 corresponding sections of photosensitive circuit are constituted.Also that is, utilizing several photosensitive electricity
The rotation angle of the liquid crystal of the top of road 440, with allow reflected light can straight parallel enter up to several photosensitive circuits 440, and reach
The function of optical collimator.
In Fig. 4, Fig. 8 and Figure 10, several photosensitive circuits are only arranged in the region A in the tft layer 345
440, this is only for convenience of description.Since the size of photosensitive circuit 440 is less than the size of pixel circuit 430, in other embodiments
In, photosensitive circuit 440 and pixel circuit 430 can be also arranged in region A simultaneously.
Figure 17 is the use schematic diagram that cell type optical identification of fingerprint of the present invention shows equipment 300.It is using embedded
Optical finger print identification shows the touching function of equipment 300 to wake up optical finger print discriminating function.Also that is, only when finger touching exists
When having 440 region (such as region A) of photosensitive circuit, optical finger print discriminating function can just start operation.When finger touching is not having
When 440 region (non-area A) of photosensitive circuit, optical finger print discriminating function can't be operated.Optical finger print discriminating function is by just
It really changes after waking up, at least a light source 315 can just be opened for this, to avoid unnecessary power loss.Photosensitive circuit can in the present invention
The processing procedure of collocation pixel circuit is prepared together, therefore, optical finger print function can be embedded in display area, screen also can be improved and account for
Than.
In the present invention, several photosensitive circuits 440 are set in the tft layer 345, to carry out identification of fingerprint
Operation can allow same LCD panel to have the function of to show, touch detection and three kinds of identification of fingerprint.It is cut since panel does not need abnormal shape
It cuts, panel yield can reduce again with cost.Simultaneously do not need additionally to prepare identification of fingerprint component again, can reduce cost and
Simplify material keyholed back plate.And finger print identification function can be integrated into LCD panel because not needing special-shaped cutting, so being not required to additional
Aperture process is carried out to component, end product, such as the waterproofness of mobile phone can be increased.
Specific case is applied herein, and equipment and embodiment, which carry out, to be shown to cell type optical identification of fingerprint of the invention
It illustrates, the explanation of embodiment of above is merely used to help understand method and its core concept of the invention；Meanwhile for ability
The those skilled in the art in domain, according to the thought of the present invention, there will be changes on specific embodiment and its application range, comprehensive
On, the contents of this specification are not to be construed as limiting the invention, and protection scope of the present invention should be with the attached claims
It is quasi-.
Claims (18)
1. a kind of cell type optical identification of fingerprint show equipment, characterized by comprising:
An at least light source；
One light guide plate guides the radiation direction of an at least light source；
One tft layer, positioned at the side of the light guide plate, if having several pixel circuits, several photosensitive circuits,
Dry scan line and several data lines, several scan lines are arranged according to a first direction, which is
It is arranged according to a second direction；And
One touch-control sensing and shared electrode layer, positioned at the side back to the light guide plate of the tft layer, with several
A touch-control sensing electrode block, several transparent sensing electrode blocks are arranged according to the first direction and the second direction,
Wherein, which receives the reflected light of an at least light source, to generate an optical finger print image.
2. cell type optical identification of fingerprint as described in claim 1 shows equipment, which is characterized in that further include:
One optical collimator assists this anti-positioned at the corresponding section back to the side in the light guide plate of several photosensitive circuits
The advance for penetrating light reaches parallel straight.
3. cell type optical identification of fingerprint as claimed in claim 2 shows equipment, which is characterized in that further include:
One reflecting plate, it is defeated from the light guide plate with reflective portion positioned at the light guide plate back in the side of the tft layer
Light out；
One diffuser plate, positioned at the side for facing the tft layer of the light guide plate；
One back side brightness enhancement film, positioned at the side for facing the tft layer of the diffuser plate；And
One front brightness enhancement film, positioned at the side for facing the tft layer of the back side brightness enhancement film.
4. cell type optical identification of fingerprint as claimed in claim 2 shows equipment, which is characterized in that further include:
One cover board；
One light shield layer, positioned at the same side relative to tft layer of the cover board, which has most shading lines；
And
One chromatic filter layer, between most shading lines of the light shield layer and the surface of most shading lines.
5. cell type optical identification of fingerprint as described in claim 1 shows equipment, which is characterized in that each scan line and every
One scan-line data line junction is provided with a pixel circuit or a photosensitive circuit.
6. cell type optical identification of fingerprint as claimed in claim 5 shows equipment, which is characterized in that the pixel circuit includes one
A thin film transistor (TFT) and a capacitor, the photosensitive circuit include a thin film transistor (TFT), a capacitor and a light sensitive diode.
7. cell type optical identification of fingerprint as claimed in claim 6 shows equipment, which is characterized in that further include:
One fingerprint and scan drive circuit are connected to several scan lines, sequentially or at random to open several scan lines
In the corresponding pixel circuit of a scan line or the photosensitive circuit；And
One display, touch-control and optical finger print control circuit, are connected to the fingerprint and scan drive circuit and several data lines.
8. cell type optical identification of fingerprint as claimed in claim 7 shows equipment, which is characterized in that the display, touch-control and light
Learning fingerprint control circuit includes:
One multi-task unit, has several multiplexers, and each multiplexer has a first end, a second end and one the
Three ends, the first end are connected to a respective data lines in several data lines；
One display driver element is connected to the second end of each multiplexer, and data will be shown via the multi-task unit
And several data lines and be written to corresponding pixel circuit；And
The driving of one optical finger print and sensing unit, are connected to the third end of each multiplexer, by initial voltage via this
Multi-task unit and several data lines and be written to the corresponding photosensitive circuit or via the multi-task unit and this is several
Data line and the induced voltage for reading in the corresponding photosensitive circuit.
9. cell type optical identification of fingerprint as claimed in claim 8 shows equipment, which is characterized in that the display, touch-control and light
Fingerprint control circuit is learned to further include:
One shared electrode and touch-control sensing unit are connected to several touch-control sensings electricity of the touch-control sensing and shared electrode layer
Polar region block, so that several transparent sensing electrode blocks carry out self-capacitance touch detection or keep several touch-control sensings electric
Polar region block provides a common voltage to carry out display operation；And
One control unit is connected to the multi-task unit, the display driver element, optical finger print driving and sensing unit, is somebody's turn to do
Shared electrode and touch-control sensing unit and the fingerprint and scan drive circuit, to provide a display operation, touch detection behaviour
Work or the correlation timing and control signal of identification of fingerprint operation.
10. cell type optical identification of fingerprint as claimed in claim 9 shows equipment, which is characterized in that touch detection operation
Priority be higher than the display operation priority and the identification of fingerprint operation priority, the priority of the display operation with should
The priority of identification of fingerprint operation is identical.
11. cell type optical identification of fingerprint as described in claim 1 shows equipment, which is characterized in that the tft layer
It further includes:
Several fingerprint data lines are arranged according to the second direction,
Wherein, each data line junction of each scan line of several scan lines and several data lines is arranged
There is a pixel circuit, each fingerprint data line junction setting of each scan line and several fingerprint data lines
There is a photosensitive circuit.
12. cell type optical identification of fingerprint as described in claim 1 shows equipment, which is characterized in that the tft layer
It further includes:
Several finger scan lines are arranged according to the first direction；And
Several fingerprint data lines, this is arranged according to the second direction,
Wherein, each data line junction of each scan line of several scan lines and several data lines is arranged
Have a pixel circuit, each finger scan line of several finger scan lines and several fingerprint data lines it is each
Fingerprint data line junction is provided with a photosensitive circuit.
13. cell type optical identification of fingerprint as claimed in claim 2 shows equipment, which is characterized in that the optical collimator is packet
Containing the polaroid with optically focused micro-structure.
14. cell type optical identification of fingerprint as claimed in claim 2 shows equipment, which is characterized in that the optical collimator is position
In a light shield layer, which is positioned at the side for facing tft layer of a cover board, which is by most items
Shading line is constituted, which is made with the majority shading line using identical light shield.
15. cell type optical identification of fingerprint as claimed in claim 2 shows equipment, which is characterized in that the optical collimator is position
In a chromatic filter layer, which is made with the chromatic filter layer using identical light shield.
16. cell type optical identification of fingerprint as claimed in claim 2 shows equipment, which is characterized in that the optical collimator be for
Several liquid crystal picture elements by being located at several photosensitive circuit corresponding sections are constituted.
17. cell type optical identification of fingerprint as described in claim 1 shows equipment, which is characterized in that at least a light source is for this
For cold cathode fluorescent tube light source, thermic cathode fluorimetric pipe light source or LED source.
18. cell type optical identification of fingerprint as claimed in claim 16 shows equipment, which is characterized in that an at least light source is more
Including infrared ray or visible light source.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710636966.8A CN109325384B (en) | 2017-07-31 | 2017-07-31 | Embedded optical fingerprint identification display equipment |
| CN202111482522.6A CN114187617A (en) | 2017-07-31 | 2017-07-31 | Control circuit of embedded optical fingerprint identification display device and embedded optical fingerprint identification display equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710636966.8A CN109325384B (en) | 2017-07-31 | 2017-07-31 | Embedded optical fingerprint identification display equipment |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111482522.6A Division CN114187617A (en) | 2017-07-31 | 2017-07-31 | Control circuit of embedded optical fingerprint identification display device and embedded optical fingerprint identification display equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109325384A true CN109325384A (en) | 2019-02-12 |
| CN109325384B CN109325384B (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111482522.6A Pending CN114187617A (en) | 2017-07-31 | 2017-07-31 | Control circuit of embedded optical fingerprint identification display device and embedded optical fingerprint identification display equipment |
| CN201710636966.8A Active CN109325384B (en) | 2017-07-31 | 2017-07-31 | Embedded optical fingerprint identification display equipment |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111482522.6A Pending CN114187617A (en) | 2017-07-31 | 2017-07-31 | Control circuit of embedded optical fingerprint identification display device and embedded optical fingerprint identification display equipment |
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Also Published As
| Publication number | Publication date |
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| CN109325384B (en) | 2022-05-13 |
| CN114187617A (en) | 2022-03-15 |
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