CN109977785A - Finger print input device - Google Patents
Finger print input device Download PDFInfo
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- CN109977785A CN109977785A CN201910154709.XA CN201910154709A CN109977785A CN 109977785 A CN109977785 A CN 109977785A CN 201910154709 A CN201910154709 A CN 201910154709A CN 109977785 A CN109977785 A CN 109977785A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
- G06V10/12—Details of acquisition arrangements; Constructional details thereof
- G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
- G06V10/147—Details of sensors, e.g. sensor lenses
-
- 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
-
- 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
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
Abstract
The present invention relates to a kind of finger print input devices.The finger print input device includes luminescent layer, the micro-lens arrays layer being arranged on luminescent layer non-light source side and micro-lens arrays layer is arranged in far from the imaging sensor on luminescent layer side, the light of luminescent layer outgoing is reflected back by fingerprint, the light being reflected back toward is focused on the pixel array of imaging sensor by micro-lens arrays layer, to reduce the crosstalk between pixel, improve the directive property of illumination, enhance the intensity of illumination simultaneously and improve the utilization rate of luminous energy, imaging sensor is able to carry out detection and generates the image information of high quality corresponding with fingerprint.
Description
Technical field
The present invention relates to field of display technology, more particularly to a kind of finger print input device.
Background technique
Bio-identification fingerprint technique continues to develop in highly safe a networked society.Due to mature technology, fingerprint is known
It is not widely used in safety, immigrant's even financial certification authority application.The mainstream of fingerprint sensing method is capacitive and optical type.Capacitor
Formula sensing technology distinguishes ridge and the paddy of fingerprint using capacitance difference, however due to sensing principle, crosstalk severe jamming signal is simultaneously led
Cause poor image quality.Optical type sensing technology usually provides better image quality, however, due to prism and optical element etc.
Huge volume but limits their certain applications.
Therefore, there is crosstalk severe jamming signal and lead to poor image quality in illustrative finger print input device.
Summary of the invention
Based on this, it is necessary to provide a kind of finger print input device for capableing of improving image quality.
In order to achieve the object of the present invention, the present invention adopts the following technical scheme:
A kind of finger print input device, comprising:
Luminescent layer；
Micro-lens arrays layer on luminescent layer non-light source side is set, and the micro-lens arrays layer is set as fingerprint
The light of reflection focuses on imaging sensor；And
Imaging sensor of the micro-lens arrays layer on the luminescent layer side, described image sensor are set
It is set as sensing the light reflected by fingerprint, image information corresponding with the fingerprint is generated according to the light of reflection.
The finger print input device further includes the encapsulated layer of setting on the light-emitting layer in one of the embodiments,.
The finger print input device further includes the transparency cover being arranged on the encapsulated layer in one of the embodiments,
Plate, the transparent cover plate have fingerprint contact surface.
The luminescent layer includes: in one of the embodiments,
Driving backboard on the micro-lens arrays layer is set；And
Luminescence unit on the driving backboard is set.
The driving backboard includes transmission region and non-transparent region in one of the embodiments,；The light of fingerprint reflection
The micro-lens arrays layer is incident to by the transmission region.
The pixel array that the driving backboard includes substrate and is disposed on the substrate in one of the embodiments, it is described
Colored filter is pasted on pixel array；
The luminescence unit includes the first electrode and second electrode being oppositely arranged, and setting in the first electrode and
Organic luminous layer between second electrode.
The micro-lens arrays layer includes the lenticule battle array towards the luminescent layer direction protrusion in one of the embodiments,
Column.
Described image sensor includes photo transistor sensor layer and sensor pixel battle array in one of the embodiments,
Column.
The photo transistor sensor layer includes a-Si TFT phototransistor sensing in one of the embodiments,
Device, the sensor pixel array include a-Si TFT pixel.
A kind of finger print input device, comprising:
Luminescent layer；
Micro-lens arrays layer on luminescent layer non-light source side is set, and the micro-lens arrays layer is set as fingerprint
The light of reflection focuses in described image sensor；
Imaging sensor of the micro-lens arrays layer on the luminescent layer side, described image sensor are set
It is set as sensing the light reflected by fingerprint, image information corresponding with the fingerprint is generated according to the light of reflection；
Wherein, the luminescent layer includes the driving backboard being arranged on the micro-lens arrays layer and is arranged in the drive
Luminescence unit on dynamic backboard；The driving backboard includes transmission region and non-transparent region, and the light of fingerprint reflection passes through described
Transmission region is incident to the micro-lens arrays layer；
The micro-lens arrays layer includes the microlens array towards the luminescent layer direction protrusion；
Described image sensor includes photo transistor sensor layer and sensor pixel array, and the phototransistor passes
Sensor layer includes a-Si TFT photo transistor sensor, and the sensor pixel array includes a-Si TFT pixel.
Above-mentioned finger print input device, including luminescent layer, the micro-lens arrays layer being arranged on luminescent layer non-light source side and
Micro-lens arrays layer is set far from the imaging sensor on luminescent layer side, the light of luminescent layer outgoing is reflected back by fingerprint, quilt
The light being reflected back is focused on the pixel array of imaging sensor by micro-lens arrays layer, to reduce the string between pixel
It disturbs, improves the directive property of illumination, while enhancing the intensity of illumination and improving the efficiency of light energy utilization, imaging sensor is able to carry out detection
And generate the image information of high quality corresponding with fingerprint.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the finger print input device of an embodiment；
Fig. 2 is the structural schematic diagram of the luminescent layer of 1 finger print input device of corresponding diagram；
Fig. 3 is the structural schematic diagram of the driving backboard of 2 luminescent layer of corresponding diagram；
Fig. 4 is the structural schematic diagram of the luminescence unit of 2 luminescent layer of corresponding diagram；
Fig. 5 is the structural schematic diagram of another luminescence unit of 2 luminescent layer of corresponding diagram；
Fig. 6 is the partial structural diagram of 1 finger print input device of corresponding diagram；
Fig. 7 is the partial structural diagram of 1 finger print input device of corresponding diagram；
Fig. 8 is the structural schematic diagram of the finger print input device of another embodiment.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give optional embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, purpose of providing these embodiments is keeps the understanding to the disclosure more saturating
It is thorough comprehensive.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
Body embodiment purpose, it is not intended that in limitation the present invention.
It is the structural schematic diagram of the finger print input device in the present embodiment referring to Fig. 1, Fig. 1.
In the present embodiment, finger print input device 10 includes luminescent layer 110, is arranged on 110 non-light source side of luminescent layer
Micro-lens arrays layer 120 and imaging sensor 130 of the micro-lens arrays layer 120 on 110 side of luminescent layer is set.
In embodiments of the present invention, luminescent layer 110 is set as emitting the light with one or more colors in emission side.Tool
Body, sensing surface of the light that luminescent layer 110 is emitted in fingerprint contacting area is incident, and incident light is reflected back by fingerprint, is reflected
The light returned is focused on imaging sensor 130 by micro-lens arrays layer 120.Wherein, which includes but is not limited near ultraviolet
One of light, purple light, blue light, green light, sodium yellow, red light, near infrared light or white light are a variety of, according to luminous
The difference of the actual setting of layer 110, the color of light may also be different out.Luminescent layer 110 can be the layer structure of single layer, can also be with
It is the combination of multilayered structure, such as can be display panel.
In one embodiment, referring to fig. 2, luminescent layer 110 may include the driving back being arranged on micro-lens arrays layer 120
Plate 111 and the luminescence unit 112 being arranged on driving backboard.
Wherein, driving backboard 111 includes transmission region and non-transparent region, and transmission region and non-transparent region alternately go out
It is existing.The width of each transmission region can be equal, can also be unequal；The width in each non-transparent region can also be equal,
It can be unequal.The light of fingerprint reflection can be focused on micro-lens arrays layer 120 by transmission region.It is real one referring to Fig. 3
It applies in example, driving backboard 111 includes substrate 111a and the pixel array 111b being arranged on substrate 111a, and pixel array 111b is set
It sets and is pasted with colored filter 111c, colored filter 111c on the non-transparent region of driving backboard 111, pixel array 111b
Color blocking including respectively corresponding red (R), green (G), blue (B) and white (W), passes through pixel array 111b and colored filter 111c
Drive the true color of luminescence unit 112.Wherein, pixel array 111b is TFT (Thin Film Transistor, film crystal
Pipe) pixel array.
Wherein, luminescence unit 112 can be OLED (Organic Light-Emitting Diode, organic light-emitting diodes
Pipe) device, QLED (Quantum Dot Light Emitting Diodes, light emitting diode with quantum dots) device or TFT-
LCD (Thin film transistor-liquid crystal display, Thin Film Transistor-LCD) liquid crystal display
One of device, specifically, luminescence unit 112 can also be AMOLED (Active-matrix organic light
Emitting diode, active matrix organic light-emitting diode) device.It is illustrated with OLED device.Referring to fig. 4, it sends out
Light unit 112 includes the first electrode 112a and second electrode 112b that are oppositely arranged, and setting is in first electrode 112a and the
One or more organic luminous layer 112c between two electrode 112b (Fig. 4 is by taking an organic luminous layer as an example).Wherein, the first electricity
Pole 112a is anode, and second electrode 112b is cathode, which is top emitting device.Organic luminous layer 112c can be with
Including one of feux rouges green light emitting layer, blue light-emitting or two kinds.It should be noted that in order to enhance luminescence unit
112 luminous efficiency, luminescence unit 112 can also increase corresponding functional layer, and for example, with reference to Fig. 5, luminescence unit 112 can be with
Including anode 1121, hole injection layer 1122, the first hole transmission layer 1123, the blue light-emitting 1124, first set gradually
Electron transfer layer 1125, the first electron injecting layer 1126, intermediate connector 1127, the second hole transmission layer 1128, feux rouges green light
Luminescent layer 1129, the second electron transfer layer 1130, the second electron injecting layer 1131 and cathode 1132.
In embodiments of the present invention, micro-lens arrays layer 120 is arranged on 110 non-light source side of luminescent layer, and reception passes through drive
The light of the fingerprint reflection of dynamic 111 transmission region of backboard.Specifically, micro-lens arrays layer 120 includes towards 110 direction of luminescent layer protrusion
Microlens array, with assemble fingerprint reflection light.Microlens array can be directly integrated on imaging sensor 130, thus
It does not need additionally to increase supporting layer in imaging sensor 130, reduces the cost of imaging sensor 130.It is micro- referring to Fig. 6
Each lenticule in lens array may include the light transmission medium portion 121 being arranged on imaging sensor 130 and be arranged in light transmission
Lens section 122 in dielectric portion 121.Wherein, the focal plane of lens section 122 is on the pixel array of imaging sensor 130, lens
122 convex surface of portion includes but is not limited to round, ellipse.When the emergent light of luminescent layer 110 is when fingerprint contact surface is reflected, lens
Portion 122 focuses to the light that fingerprint reflects on the pixel array of imaging sensor 130, to reduce the crosstalk between pixel, mentions
The directive property that bloom is shone, while enhancing the intensity of illumination, so that imaging sensor 130 is able to carry out detection and generates and fingerprint phase
The image information of corresponding high quality.Wherein, the refractive index of 121 material of light transmission medium portion is less than the refraction of 122 material of lens section
Rate, to guarantee that each lens section 122 gives full play to focusing light effect.Wherein, the thickness in light transmission medium portion 121 is according to lens section 122
Convex surface is at a distance from luminescent layer 110, the folding of 122 material of the focal length of 122 radius of curvature of lens section, lens section 122 and lens section
It penetrates rate etc. to be configured, keeps light transmission medium portion 121 again when guaranteeing that lens section 122 can play corresponding light focussing force
Thickness it is as thin as possible, even, light transmission medium portion 121 can be zero.In one embodiment, micro-lens arrays layer 120 can be with
It is 10 μm -500 μm, thus in guarantee, it can play corresponding light aggtegation, while avoid entire finger print input device again
Thickness it is too big.
In embodiments of the present invention, imaging sensor 130 is set as sensing the light reflected by fingerprint, is produced according to the light of reflection
Raw image information corresponding with fingerprint.Specifically, the light emitted using luminescent layer 110 is as light source, when light source encounters fingerprint
The place of wave crest will form stronger reflected light；If encountering the place of fingerprint trough, then weaker reflected light is formed.Image
Sensor 130 utilizes read signal strength or weakness, can rebuild the shape of fingerprint.
In one embodiment, imaging sensor 130 includes photo transistor sensor array 131 and sensor pixel battle array
Column 132, sensor pixel array 132 sense the light that is reflected by fingerprint, and photo transistor sensor array 131 is according to the light of reflection
Generate image information corresponding with fingerprint.
Wherein, the size of each pixel in sensor pixel array 132 can be selected according to the demand of actual product
Setting.Multiple sensor pixels can arrange in line-column matrix.The quantity of sensor pixel can be opposite with the quantity of lenticule
It answers, in one embodiment, can be the corresponding lenticule of a sensor pixel.Sensor pixel array 132 can be set
It sets on photo transistor sensor array 131 (Fig. 7 is with this example), and the setting of each pixel is specifically corresponded in driving backboard 131
Light transmission part projected position at, so as to receive the light being reflected back by micro-lens arrays layer 120.Sensor pixel
Array 132 can also be disposed on the substrate parallel with photo transistor sensor array 131.In one embodiment, photoelectric crystal
Tube sensor array 131 includes a-Si TFT photo transistor sensor, and sensor pixel array 132 includes a-Si TFT picture
Element, imaging sensor 130 have high optics utilization rate, to improve the quality of optical information transmitting.In another embodiment,
Photo transistor sensor array 131 includes a-Si:H TFT photo transistor sensor, and sensor pixel array 132 includes a-
Si:H TFT pixel, imaging sensor 130 have higher optics utilization rate, to improve the quality of optical information transmitting.
Finger print input device provided in this embodiment including luminescent layer 110, is arranged on 110 non-light source side of luminescent layer
Micro-lens arrays layer 120 and micro-lens arrays layer 120 is set far from the imaging sensor 130 on 110 side of luminescent layer, hair
The light that photosphere 110 is emitted is reflected back by fingerprint, and the light being reflected back toward focuses on imaging sensor by micro-lens arrays layer 120
On 130 pixel array, to reduce the crosstalk between pixel, improve the directive property of illumination, at the same enhance illumination intensity and
The efficiency of light energy utilization is improved, imaging sensor 120 is able to carry out detection and generates the image information of high quality corresponding with fingerprint.
The present embodiment additionally provides another finger print input device 20, and referring to Fig. 8, which includes shining
Layer 210, the micro-lens arrays layer 220 being arranged on 210 non-light source side of luminescent layer, setting are in micro-lens arrays layer 220 away from hair
Imaging sensor 230 on 210 side of photosphere, the encapsulated layer 240 being arranged on luminescent layer 210 and it is arranged in encapsulated layer 240
On transparent cover plate 250.Wherein, luminescent layer 210, micro-lens arrays layer 220 and imaging sensor 230 are referring to a upper embodiment
The associated description of luminescent layer 110, micro-lens arrays layer 120 and imaging sensor 130, details are not described herein.
In the present embodiment, luminescent layer 210 is affected by environment in order to prevent, starvation and moisture, shines to improve
The service life of the luminous stability of layer 210 and finger print input device, finger print input device further include being arranged in luminescent layer 210
On encapsulated layer 240.Encapsulated layer 240 is photic zone, can be single layer structure, is also possible to the overlapping of multilayer；It can be substrate,
It is also possible to film.The material of encapsulated layer 240 is not limited, such as can be inorganic material layer, and including but not limited to silicon aoxidizes
Object, silicon nitride etc. can be used as the effective barrier layer of water/oxygen；It is also possible to organic material layer, including but not limited to macromolecule
The materials such as polymer, resin can be used as flexible package layer.
In the present embodiment, in order to improve the service life of finger print input device, finger print input device 20 further includes setting
Transparent cover plate 250 on encapsulated layer 240, to protect luminescent layer 210, micro-lens arrays layer 220 and imaging sensor 230.
Transparent cover plate has fingerprint contact surface, can directly contact with the ridge region of fingerprint.
Finger print input device provided by the embodiment, including luminescent layer 210, micro-lens arrays layer 220, imaging sensor 230,
Encapsulated layer 240 and transparent cover plate 250, the light that luminescent layer 210 is emitted are reflected back by fingerprint, and the light being reflected back toward passes through lenticule
Array layer 220 focuses on the pixel array of imaging sensor 230, to reduce the crosstalk between pixel, improves the finger of illumination
Tropism, at the same enhance illumination intensity and improve the efficiency of light energy utilization, imaging sensor 220 be able to carry out detection and generate and fingerprint
The image information of corresponding high quality；Meanwhile it can further isolation environment pair by encapsulated layer 240 and transparent cover plate 250
The influence of finger print input device 20 improves the stability and safety of finger print input device 20, improves service life.
The present embodiment additionally provides a kind of display device, which includes the input dress of fingerprint described in embodiment as above
It sets.Display device provided in this embodiment can show the image information of high quality corresponding with fingerprint.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of finger print input device characterized by comprising
Luminescent layer；
Micro-lens arrays layer on luminescent layer non-light source side is set, and the micro-lens arrays layer is set as reflecting in fingerprint
Light focus on imaging sensor；And
Imaging sensor of the micro-lens arrays layer on the luminescent layer side, described image sensor setting are set
To sense the light reflected by fingerprint, image information corresponding with the fingerprint is generated according to the light of reflection.
2. finger print input device according to claim 1, which is characterized in that the finger print input device further includes that setting exists
Encapsulated layer on the luminescent layer.
3. finger print input device according to claim 2, which is characterized in that the finger print input device further includes that setting exists
Transparent cover plate on the encapsulated layer, the transparent cover plate have fingerprint contact surface.
4. finger print input device according to claim 1-3, which is characterized in that the luminescent layer includes:
Driving backboard on the micro-lens arrays layer is set；And
Luminescence unit on the driving backboard is set.
5. finger print input device according to claim 4, which is characterized in that the driving backboard includes transmission region and non-
Transmission region；The light of fingerprint reflection is incident to the micro-lens arrays layer by the transmission region.
6. finger print input device according to claim 4, which is characterized in that the driving backboard includes that substrate and setting exist
Pixel array on substrate is pasted with colored filter on the pixel array；
The luminescence unit includes the first electrode and second electrode being oppositely arranged, and is arranged in the first electrode and second
Organic luminous layer between electrode.
7. finger print input device according to claim 1-3, which is characterized in that the micro-lens arrays layer includes
Towards the microlens array of the luminescent layer direction protrusion.
8. finger print input device according to claim 1-3, which is characterized in that described image sensor includes light
Electric transistor sensor layer and sensor pixel array.
9. finger print input device according to claim 8, which is characterized in that the photo transistor sensor layer includes a-
Si TFT photo transistor sensor, the sensor pixel array include a-Si TFT pixel.
10. a kind of finger print input device characterized by comprising
Luminescent layer；
Micro-lens arrays layer on luminescent layer non-light source side is set, and the micro-lens arrays layer is set as reflecting in fingerprint
Light focus in described image sensor；And
Imaging sensor of the micro-lens arrays layer on the luminescent layer side, described image sensor setting are set
To sense the light reflected by fingerprint, image information corresponding with the fingerprint is generated according to the light of reflection；
Wherein, the luminescent layer includes that the driving backboard being arranged on the micro-lens arrays layer and setting are carried on the back in the driving
Luminescence unit on plate；The driving backboard includes transmission region and non-transparent region, and the light of fingerprint reflection passes through the light transmission
Region is incident to the micro-lens arrays layer；
The micro-lens arrays layer includes the microlens array towards the luminescent layer direction protrusion；
Described image sensor includes photo transistor sensor layer and sensor pixel array, the photo transistor sensor
Layer includes a-Si TFT photo transistor sensor, and the sensor pixel array includes a-Si TFT pixel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910154709.XA CN109977785A (en) | 2019-03-01 | 2019-03-01 | Finger print input device |
| PCT/CN2019/078115 WO2020177151A1 (en) | 2019-03-01 | 2019-03-14 | Fingerprint input device and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910154709.XA CN109977785A (en) | 2019-03-01 | 2019-03-01 | Finger print input device |
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| CN109977785A true CN109977785A (en) | 2019-07-05 |
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| CN201910154709.XA Pending CN109977785A (en) | 2019-03-01 | 2019-03-01 | Finger print input device |
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| WO (1) | WO2020177151A1 (en) |
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| CN110728266A (en) * | 2019-10-30 | 2020-01-24 | 维沃移动通信（杭州）有限公司 | Display module and electronic equipment |
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| Publication number | Publication date |
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| WO2020177151A1 (en) | 2020-09-10 |
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