CN109902651A - Biological characteristic detects mould group and backlight module and electronic device - Google Patents
Biological characteristic detects mould group and backlight module and electronic device Download PDFInfo
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- CN109902651A CN109902651A CN201910178924.3A CN201910178924A CN109902651A CN 109902651 A CN109902651 A CN 109902651A CN 201910178924 A CN201910178924 A CN 201910178924A CN 109902651 A CN109902651 A CN 109902651A
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- backlight
- biological characteristic
- mould group
- light beam
- backlight module
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Abstract
The invention discloses a kind of biological characteristics to detect mould group, the biological characteristic detection mould group can receive the detection light beam of external object transmitting and/or reflection through a backlight module, the detection light beam detects mould group or other light sources by the biological characteristic and emits in external object or the detection light beam is that external object emits, the detection light beam can be used in the biological characteristic detection and identification of the two dimension or three-dimensional of external object, the backlight module can provide backlight beam to a display panel, detection light beam of the backlight module described in directive adjacent to biological characteristic detection mould group side can penetrate the backlight module, and backlight beam of the backlight module described in directive adjacent to biological characteristic detection mould group side can be reflected by the backlight module.The invention also discloses a kind of backlight module and electronic devices.Biological characteristic detection mould group of the present invention and backlight module and electronic device have biological characteristic detection effect under preferable shield.
Description
Technical field
The present invention relates to field of photoelectric technology more particularly to a kind of biological characteristic detection mould groups and backlight module and electronics dress
It sets.
Background technique
As technological progress and people's living standard improve, for the electronic products such as mobile phone, tablet computer, camera, user
Require more multi-functional and fashion appeal.Currently, the development trend of mobile phone is frivolous, close screen comprehensively, while having preposition
The functions such as camera self-timer and recognition of face.And as the function that electronic equipment is supported is more and more abundant, the element for needing to be arranged
Quantity is also more and more, needs to occupy the position of the positive display area of a part of electronic equipment, influences beautiful and user experience.
Recently, in order to realize screen comprehensively or close to screen effect comprehensively, shield lower biological characteristic detection technique and come into being, also
It is the lower section that biological characteristic detection mould group is placed on to display screen, detection light beam is sent or received by display screen and realizes biological characteristic
Detection.However for the display screen of non-spontaneous light type, such as liquid crystal display, shields lower biological characteristic detection and need to solve screen
The problem of about detection beam transmittance.Part manufacturer, which is proposed, is placed on biological characteristic detection mould group below backlight module, and
To the scheme of entire display screen and backlight module aperture.Although this scheme can be realized the lower biological characteristic detection of screen, but need
Relative complex technique, product cost is higher, and due to needing the aperture on screen and backlight module, so that screen is integrally shown
The visual effect and beauty shown are poor, and because light leakage and display that aperture will lead to are uneven, also cause to shield lower biological special
Sign detection experience and effect are poor.
Summary of the invention
In view of this, the present invention provide it is a kind of for solve prior art problem for shielding lower biological characteristic detection mould
Group and backlight module and electronic device.
One aspect of the present invention discloses a kind of biological characteristic detection mould group, and the biological characteristic detection mould group can be saturating
The detection light beam that a backlight module receives external object transmitting and/or reflection is crossed, the detection light beam is by the biological characteristic
Detection mould group or other light sources emit in external object or the detection light beam is that external object emits, the detection light beam energy
The biological characteristic detection and identification, the backlight module for being enough in the two dimension or three-dimensional of external object can give a display panel
Backlight beam is provided, detection light beam of the backlight module described in directive adjacent to biological characteristic detection mould group side can penetrate institute
Backlight module is stated, and backlight beam of the backlight module described in directive adjacent to biological characteristic detection mould group side can be described
Backlight module reflection.
Optionally, the backlight module is greater than the disperse function of the backlight beam and makees to the diverging of the detection light beam
With.
Optionally, the backlight module includes the reflector plate through the detection light beam and the reflection backlight beam, institute
Biological characteristic detection mould group is stated to be at least partially disposed below the reflector plate.
Optionally, the detection light beam enters through the transmission angle after a diffusion sheet of the backlight module relative to it
The offset of firing angle degree is less than offset of the backlight beam through the transmission angle after the diffusion sheet relative to its incident angle.
Optionally, the biological characteristic detection mould group is at least partially disposed in below the backlight module, and the biology is special
Sign detection mould group can penetrate on backlight module transmitting detection light beam to external object, or directly transmitting detection light beam is outside
On portion's object, the infrared light that the detection light beam is wavelength 800nm or more, the backlight beam is visible light.
Optionally, the backlight module includes the reflection that can penetrate the detection light beam and the reflection backlight beam
Piece, the reflector plate be by multilayer to it is described detection light beam and backlight beam refractive index it is not exactly the same polymer superposition or
Fitting is constituted, and the reflector plate has 80% or more transmitance to the light beam of 800nm above wavelength, to 780nm or less wavelength
Light beam have 90% or more reflectivity.
Optionally, the diffusion sheet is quantum dot film or nano-porous films.
Optionally, the biological characteristic detection mould group includes transmitting unit and receiving unit, and the receiving unit can be saturating
The detection light beam from the transmitting unit that the backlight module receives external object reflection is crossed, the transmitting unit setting exists
Below the reflector plate or side is integrated in the backlight module, and the transmitting unit is for emitting the detection light beam
Onto external object, biological characteristic detection mould group can according to the two dimension of the detection light beam acquisition external object received or
Three-dimensional biological information is to realize biological characteristic detection and identification.
One aspect of the present invention discloses a kind of backlight module, and it can be used to above-mentioned biological characteristic detection mould group is saturating
It crosses the backlight module and receives the detection light beam for detecting and identifying for biological characteristic, the backlight module can give a display surface
Plate provides backlight beam, back of the backlight module backlight module described in directive adjacent to biological characteristic detection mould group side
The backlight beam diverging of the reflection of light light beam and the backlight module described in directive far from biological characteristic detection mould group side, it is described
Detection light beam can penetrate the backlight module.
Optionally, the backlight module includes reflector plate, the light guide plate being successively set on the reflector plate and optics group
Part and the backlight that the light guide plate side is arranged in, for emitting backlight beam, the reflector plate is used for the backlight
The backlight beam that backlight emits is reflected into light guide plate and the detection light beam is allowed to be directed through, the light guide plate includes one
A and neighbouring light-emitting surface of optical module, the light guide plate are used for so that from the backlight beam that its side enters from the light-emitting surface
It is emitted and enters the optical module, the optical module includes being greater than the detection light beam to the backlight beam disperse function
Diffusion sheet, the reflector plate reflects the backlight beam and penetrates the detection light beam.
One aspect of the present invention discloses a kind of electronic device, including display and is arranged in below the display
Biological characteristic detects mould group, and the display includes backlight module and display panel, and the backlight module is arranged in the display
Below the panel, the biological characteristic detection mould group are at least partially disposed in below the backlight module, the biological characteristic detection
Mould group is that above-mentioned biological characteristic detects mould group.
Compared to the prior art, electronic device of the present invention, backlight module and biological characteristic detection mould group are by using to inspection
Light beam transmission and the backlight module to backlight beam reflection and disperse function are surveyed, just can without being punched on backlight module
It realizes biological characteristic detection and the identification under screen, there is preferable whole visual effect and user experience, so that under screen of the present invention
Biological characteristic detection effect is preferable, also from the one hand reducing process costs.
Detailed description of the invention
Fig. 1 is the stereoscopic schematic diagram of one embodiment of the present of invention；
Fig. 2 is the partial cutaway schematic view of embodiment illustrated in fig. 1；
Fig. 3 is the reflector plate transmittance curve schematic diagram of embodiment illustrated in fig. 1；
Fig. 4 is the partial structure diagram of embodiment illustrated in fig. 1；
Fig. 5 is the schematic diagram of one change embodiment of the present invention；
Fig. 6 is the schematic diagram of one change embodiment of the present invention.
Specific embodiment
In the specific descriptions to the embodiment of the present invention, it should be understood that when substrate, piece, layer or pattern are referred to as another
When "above" or "below" a substrate, another piece, another layer or another pattern, it can be " directly " or " indirectly " another
On one substrate, another piece, another layer or another pattern, or there may also be one or more middle layers.In order to
The thickness and size of layer each of can be exaggerated, omit or schematically show Figure of description to clear purpose.This
Outside, the size of element and non-fully reflect actual size in attached drawing.
An embodiment provides a kind of biological characteristics to detect mould group, and the biological characteristic detection mould group can
The detection light beam of external object transmitting and/or reflection is received through a backlight module.The detection light beam is special by the biology
Sign detection mould group or other light sources emit to being reflected in external object and by the external object or the detection light beam is by outer
The transmitting of portion's object.The detection light beam can be used in the biological characteristic detection and identification of the two dimension or three-dimensional of external object.It is described
Backlight module can provide backlight beam to a display panel, and backlight module described in directive detects mould adjacent to the biological characteristic
The detection light beam of group side can penetrate the backlight module, and backlight module described in directive detects mould adjacent to the biological characteristic
The backlight beam of group side can be reflected by the backlight module.
The biological characteristic detection mould group is at least partially disposed in below the backlight module, and the biological characteristic detects mould
Group can detect on light beam to external object through backlight module transmitting, or directly transmitting detects light beam to external object
On.The backlight module is greater than the disperse function to the detection light beam to the disperse function of the backlight beam.
The backlight module includes the reflector plate through the detection light beam and the reflection backlight beam, and the biology is special
Sign detection mould group is at least partially disposed below the reflector plate.
The detection light beam is through the transmission angle after a diffusion sheet of the backlight module relative to its incident angle
Offset be less than offset of the backlight beam through the transmission angle after the diffusion sheet relative to its incident angle.
Biological characteristic detection mould group by when the collecting biological feature information of the detection external portion's object of light beam not
Influence the backlight beam be provided to a display panel for show illumination.The backlight module includes to the backlight light
Misconvergence of beams effect is greater than the diffusion sheet of the detection light beam.The diffusion sheet is quantum dot film or nano-porous films.
The infrared light that the detection light beam is wavelength 800nm or more, the backlight beam are visible light.The backlight module
Reflector plate including that can penetrate the detection light beam and the reflection backlight beam, the reflector plate is by multilayer to the inspection
The not exactly the same polymer superposition or fitting of refractive index for surveying light beam and backlight beam is constituted, the reflector plate to 800nm with
The light beam of upper wavelength has 80% or more transmitance, has 90% or more reflectivity to the light beam of 780nm or less wavelength.
The biological characteristic detection mould group includes transmitting unit and receiving unit.The receiving unit can penetrate the back
Optical mode group receives the detection light beam from the transmitting unit of external object reflection.The transmitting unit is arranged in the reflection
Below piece or side is integrated in the backlight module, and the transmitting unit is right to outside for emitting the detection light beam
As upper.The biological characteristic detection mould group can be according to the life of the two dimension or three-dimensional of the detection light beam acquisition external object received
Object characteristic information is to realize biological characteristic detection and identification.
When carrying out biological characteristic detection, the detection light beam of the transmitting unit transmitting is aobvious by the backlight module and one
Show that panel is emitted to outside or the detection light beam of transmitting unit transmitting directly passes through the display panel and is emitted to outside, or
The detection light beam of the transmitting unit transmitting is directly emitted to outside；The detection light beam is emitted to outside and anti-by external object
The receiving unit can be reached after penetrating by the display panel and backlight module, the biological characteristic detection mould group being capable of root
According to the two dimension of the detection light beam acquisition external object received or the biological information of three-dimensional to realize that biological characteristic detects
And identification.
Other embodiments of the invention additionally provide a kind of backlight module, can be used in such as any of the above-described biological characteristic
It detects mould group and receives the detection light beam for detecting and identifying for biological characteristic through the backlight module.The backlight module can be given
One display panel provides backlight beam, backlight of the backlight module described in directive adjacent to biological characteristic detection mould group side
The backlight beam diverging of light beam reflection and the backlight module described in directive far from biological characteristic detection mould group side.The inspection
The backlight module can be penetrated by surveying light beam.
The backlight module include the reflector plate, the light guide plate being successively set on the reflector plate and optical module,
And the backlight of the light guide plate side is set.The backlight is for emitting backlight beam.The reflector plate is used for will
The backlight beam of backlight transmitting is reflected into light guide plate and is directed through the detection light beam.The light guide plate includes one and light
The neighbouring light-emitting surface of component is learned, the light guide plate is used for so that being emitted simultaneously from the backlight beam that its side enters from the light-emitting surface
Into the optical module.The optical module includes the diffusion sheet.
Other embodiments of the invention additionally provide a kind of electronic device including above-mentioned biological characteristic detection mould group, including aobvious
The biological characteristic detection mould group showing device and being arranged in below the display.The display includes backlight module and display surface
Plate, the backlight module are arranged below the display panel.The biological characteristic detection mould group is at least partially disposed in described
Below backlight module, the biological characteristic detection mould group is that above-mentioned biological characteristic detects mould group.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1 and Fig. 2, in one embodiment of the present of invention, an electronic device includes liquid crystal display 1 and setting
Biological characteristic below the liquid crystal display 1 detects mould group 2.The liquid crystal display 1 includes backlight module 10 and liquid crystal
Display panel 11, the backlight module 10 are arranged below the liquid crystal display panel 11.The biological characteristic detects mould group 2
It is at least partially disposed on 10 lower section of backlight module.The biological characteristic detection mould group 2 can be through liquid crystal display 1
Backlight module 10 and the transmitting of liquid crystal display panel 11 and/or reception detection light beam.The biological characteristic detection mould group 2 can penetrate
The backlight module 10 receives the detection light beam of external object reflection.The detection light beam by the biological characteristic detect mould group or
Other light sources emit in external object or the detection light beam be external object transmitting to can be used in external object biology special
The light beam of sign detection and identification.The backlight module 10 can provide backlight beam to liquid crystal display panel 11.Backlight beam by
A backlight 140 transmitting in the backlight module 10, and from part directive one after the entrance of the side of a light guide plate 120
Reflector plate 110.
Wherein, detection light beam of the backlight module 10 described in directive adjacent to biological characteristic detection 2 side of mould group can be saturating
The backlight module 10 is crossed, and backlight module 10 described in directive is adjacent to the backlight beam of biological characteristic detection 2 side of mould group
It can be reflected by the backlight module 10.
The biological characteristic detection mould group 2 includes transmitting unit 21 and receiving unit 22.The transmitting unit 21 and reception
Unit 22 can be individual chip unit respectively, can also be and be integrated in a chip unit.It transmitting unit 21 and is connect in Fig. 1
Receiving unit 22 is only to schematically show, does not represent transmitting unit 21, receiving unit 22 and shape, structure and position between them
Set any restriction of relationship.
In embodiment of the present invention and change embodiment, the receiving unit 22 be can be set in the backlight module 10
Lower section；The transmitting unit 21 is perhaps arranged below the backlight module 10 or is arranged in 10 side of backlight module
Side, is perhaps integrated in the backlight module 10 or is arranged above the backlight module 10.Such as, but not limited to, described
Transmitting unit 21 and the interval of the backlight module 10 are close to be arranged in 10 side of backlight module.The side includes but not
It is limited to upper side or side-lower or part side etc., side here can be regarded as the transmitting unit 21 in the liquid crystal
Show at least there is a projection, at least part of the projection and the backlight module nothing on the projecting direction on panel 11
Overlapping.
In embodiment of the present invention and change embodiment, the detection light beam that the transmitting unit 21 emits can be external
It is received by backlight module 10 by the receiving unit 22 after object (such as finger or face) reflection.
In further embodiment, when the biological characteristic detection mould group 2 is for fingerprint detection and identification, the transmitting is single
Member 21 and receiving unit 22 are all disposed within 10 lower section of backlight module.
In further embodiment, when the biological characteristic detection mould group 2 is used for human face detection and recognition, the transmitting is single
21 setting of member is integrated in the backlight module 10 in 10 side of backlight module or top or the transmitting unit 21；
The receiving unit 22 is arranged below the backlight module 10.
The biological characteristic detection mould group 2 can emit through backlight module 10 and/or receive detection light beam.The transmitting
Unit 21 can detect on light beam to external object or be not through the backlight module 10 through the backlight module 10 transmitting and send out
It penetrates on detection light beam to external object.The receiving unit 22 can be reflected through the backlight module 10 reception by external object
The detection light beam.The receiving unit 22 can also receive external object transmitting and/or anti-by the backlight module 10
Other light beams penetrated.The backlight module 10 is greater than the diffusion to the detection light beam to the diffusion of backlight beam.
The detection light beam can be used in the detection and identification of the biological information of external object.
Clear with understanding for convenience, the transmitting unit 21 can be used in transmitting the first detection light beam 101, and institute
Outside can be emitted to by the liquid crystal display 1 by stating the first detection light beam 101.The receiving unit 22 can be used in receiving
Second detection light beam 102, the second detection light beam 102 may include that the reception list is reached by the liquid crystal display 1
The light beam of member 22.Such as: the second detection light beam 102 may include the first detection light beam 101 in external object
By reaching the receiving unit 22 after the liquid crystal display panel 11 and backlight module 10 in reflected light after reflecting.This
In the case of kind, the second detection light beam 102 is essentially the reflected beams of the first detection light beam 101 in external object.It is logical
Cross first detection of the transmitting of transmitting unit 21 light beam 101, the receiving unit 22 receives the second detection light beam 102, the life
Object feature detection mould group 2 can obtain the two dimension of external object and/or the image information or biological information of three-dimensional.Described
External object can be the finger of user, face, iris or other objects with recognizable biological characteristic.
In addition, the second detection light beam 102 can also include other light beams that external object emits or reflects, Er Fei
The reflected beams of one detection light beam 101.For example, second detection light beam 102 can also include external object emit or reflect can
Light-exposed, the second detection light beam 102 that the receiving unit 22 can also receive the visible light of external object reflection is outer to obtain
The visible light image information of portion's object；Or second detection light beam 102 can also include external object emit or reflect it is infrared
Light, such as the irradiating infrared light of organism transmitting, so as to detect the biology character of external object, such as temperature, distance, the heart
It jumps, posture, etc..
The second light beam 102 that the biological characteristic detection mould group 2 is reflected or emitted by external object can obtain outside
The two-dimensional image information of object or biological information.The biological characteristic detection mould group 2 can also include that (figure is not for processor
Show), the processor can calculate second light beam 102 about the offset of the first light beam 101 and then obtain external object
Depth information.Further, biological information data are also stored in advance in the processor, and the processor can be by that will obtain
The two-dimensional signal and/or depth information of the external object obtained and pre-stored biological information data are compared, thus
Realize the biological characteristic detection and identification of external object, such as, but not limited to: fingerprint recognition, face recognition, iris recognition etc..
It is detected and is identified by the biological characteristic to external object, the biological characteristic detection mould group 2 can be applied to
Electronic device (such as: mobile phone) locks or unlocks, the verifying of on-line payment business, the authentication of financial system or public security system,
The multiple products such as the pass authentication of access control system and application scenarios.
As depicted in figs. 1 and 2, the backlight module 10 include reflector plate 110, be arranged on reflector plate light guide plate 120,
The backlight 140 that light guide plate side is set, the optical module 130 being arranged on light guide plate 120.The backlight 140 is used for
Emit backlight beam, backlight beam imports the optical module 130 by the light guide plate 120, and specifically, backlight beam is from described
A light-emitting surface (light guide plate 120 is adjacent to surface of the lower diffusion sheet 131 in Fig. 2) for light guide plate 120 enters the optics group
Part 130.The reflector plate 110 can be used in the backlight beam being emitted from 12 bottom surface of light guide plate for emitting backlight 140
Reflect back into the light guide plate 120 and is directed through the detection light beam (the first detection light beam 101 and the second detection light beam
102).The light guide plate 120 includes one and the neighbouring light-emitting surface (not labeled) of optical module 130, and the light guide plate 120 is used for
It is emitted the backlight beam entered from its side from the light-emitting surface and enters the optical module 130.110 He of reflector plate
The biological characteristic detection mould group 2 is close to or interval setting, and the biological characteristic detection mould group 2 is at least partially disposed on described
110 lower section of reflector plate.
In the embodiment and change embodiment, the optical module 130 may include one or more diffusion sheets
(Diffusion Film, DF), or one or more brightening pieces (Brightness Enhancement Film, BEF), or
The combination of diffusion sheet and brightening piece described in person.Such as the optical module 130 may include the lower expansion set gradually from bottom to up
Discrete piece, lower brightening piece and upper brightening piece；Or the optical module 130 include set gradually from bottom to up lower diffusion sheet, under
Brightening piece, upper diffusion sheet and upper brightening piece.About the structure and composition of optical module 130, description of the invention and attached drawing are only made
It schematically illustrates, it is fixed to be not limited thereto.
In the present embodiment, the optical module 130 includes lower diffusion sheet 131, the lower brightening piece set gradually from bottom to up
132, upper diffusion sheet 133 and upper brightening piece 134.The lower diffusion sheet 131 is close to the light guide plate 120 and is arranged.The lower diffusion
Piece 131, upper diffusion sheet 133 can be used in spreading backlight beam, and the lower brightening piece 132, upper brightening piece 134 can be used in assembling
Backlight beam simultaneously improves beam brightness in visible angle.
Therefore, the backlight beam from light guide plate 120 uniformly can be mixed and be assembled by the optical module 130,
Brightness in the uniformity and visible angle to improve the backlight beam for being emitted to the liquid crystal display panel 11.
The backlight 140 includes luminescence unit 141.The luminescence unit 141 may be provided on a circuit board 142.
The luminescence unit 142 can be light emitting diode (LED), and the luminescence unit 142 can be used in backlight beam.The backlight
Light beam can be visible light, such as white light or monochromatic light etc..In some embodiments, the backlight beam can also be invisible
Light.
For example, in a change embodiment of the present embodiment, the lower diffusion sheet 131 a part can be entered it is described under
Diverging through the lower diffusion sheet 131 and allows a part to enter the lower diffusion after the wavelength shift of the light beam of diffusion sheet 131
The light beam of piece 131 is directed through.Such as: the diffusion sheet 131, which can be converted to the backlight beam of shorter wavelength, has difference
Longer wavelength backlight beam.At this point, the backlight 140 can emit the backlight beam of blue light and by the leaded light
Plate 120 enters the lower diffusion sheet 131, and a portion blue light is converted to green light and red by the lower diffusion sheet 131
Light, another part blue light and the green light, red light dissipate injection after being mixed into white light.The lower brightening piece 132, on
Diffusion sheet 133 and upper brightening piece 134 enable to the backlight beam of the different wave length through lower diffusion sheet 131 further uniform
Mixing forms white light after assembling, and is supplied to liquid crystal display panel 11 as display illumination.
In other embodiments of the invention, the lower diffusion sheet 131 can be quantum dot film, have change light beam wavelength and
The optical characteristics of divergent beams, such as can be elongated by a part of wavelength of incident blue light, be converted to red light and green
Light.The quantum dot film is not less than 50% to the transmitance of infrared light.Therefore lower diverging of the diffusion sheet 131 to the backlight beam
Effect is greater than the disperse function to the detection light beam.
In another change embodiment in the present embodiment, the lower diffusion sheet 131 can also be nano-porous films
(nanoporous PE), the nano-porous films include it is multiple be connected with each other (interconnected) diameters 10nm~
Microcellular structure between 800nm.The backlight beam be visible light and detection light beam (including first detection light beam 101 and second
Detect light beam 102) when being infrared light, the backlight beam passes through generation diffraction and scattering, the inspection when nano-porous films
Light beam is surveyed to penetrate with being substantially unaffected.Therefore the lower diffusion sheet 131 plays disperse function to backlight beam, and to detection light
Beam does not dissipate or dissipates unobvious.The nano-porous films can be polyethylene (polyethylene, PE) material, or poly- to benzene
Dioctyl phthalate second diester (Polyethylene terephthalate, PET) material is other similar with good optical characteristic
Material is made.
Above-described embodiment although being described for following diffusion sheet 131, the upper diffusion sheet 133 also can have with
The same or similar structure of the lower diffusion sheet 131.In addition, in some embodiments, the lower diffusion sheet 131 and upper diffusion sheet
133 also can integrate as a single diffusion sheet.It will be understood by those skilled in the art that in order to realize the invention purpose
And the change to some or all of embodiment of the present invention or other change embodiments, it deforms, replacement, extension or combination etc.
It all belongs to the scope of protection of the present invention.
Therefore, in the above embodiment of the present invention, change embodiment and other embodiments, the detection light beam penetrates the back
Transmission angle after one diffusion sheet of optical mode group 10 is less than the backlight beam relative to the offset of its incident angle and penetrates institute
Offset of the transmission angle relative to its incident angle after stating diffusion sheet.
It should be noted that the backlight beam referred in this specification, can indicate the backlight in the backlight module 10
The light beam for changing wavelength by the lower diffusion sheet 131 that the light beam and the backlight 140 that source 140 emits emit, may be used also
To indicate the white light formed after the backlight beam of different wave length mixes.The effect of all these backlight beams is provided to institute
State illuminating bundle needed for liquid crystal display panel 11 provides display.The detection light beam referred in this specification can indicate described
Biological characteristic detect mould group issue and/or it is received for biological characteristic detection light beam, such as first detection light beam 101 and/or
Second detection light beam 102 also may indicate that external object dissipates or other light sources transmitting can be used by what external object reflected
In the light beam of biological characteristic detection.
Referring to Fig. 3, being the transmittance curve schematic diagram of the reflector plate 110 of embodiment illustrated in fig. 1, the reflector plate 110
There is 80% or more transmitance to the infrared light between wave-length coverage 900nm~1000nm.
Referring to Fig. 4, being the partial structure diagram of embodiment illustrated in fig. 1.The reflector plate 110 can be used in through institute
Stating detection light beam (when " detection light beam " referenced below, indicates the first detection light beam 101 and/or the second detection light beam
102).The reflector plate 110 can be used in reflecting backlight beam 103.Wherein, the backlight beam 103 that backlight 140 emits passes through
One side (i.e. incidence surface) of light guide plate 120 enters light guide plate 120, and part of backlight beam 103 passes through the light guide plate
120 bottom surface is emitted and reaches the reflector plate 110.The reflector plate 110 can be superimposed or be bonded using multi-layer optical membrane
It is formed together, by may include tens to several hundred layers optical diaphragm.Every layer of optical diaphragm is to the backlight beam 103 and detection
Light beam (including the first detection light beam 101 and/or the second detection light beam 102) has not exactly the same refractive index, backlight beam
103 finally make when penetrating above-mentioned multi-layer optical membrane with detection light beam due to reflecting or reflecting in every layer of optical diaphragm generation
The backlight beam 103 is reflected, and the detection light beam penetrates.In other words, by being constantly superimposed, configuring different optical characteristics
Multiple optical diaphragms, so that backlight beam 103 is constantly reflected and reflected between multiple optical diaphragms, and detecting light beam can be saturating
Multiple optical diaphragms are crossed, to realize that the reflector plate 110 can penetrate the detection light beam and reflect the backlight beam
103.The optical diaphragm can be made of polymer or other materials.
In the present embodiment, the reflector plate 110 be by multilayer to it is described detection light beam and backlight beam 103 refractive index not
Identical polymer superposition or fitting are constituted, and the reflector plate is to the light beam of 800nm above wavelength with 80% or more
Transmitance has 90% or more reflectivity to the light beam of 780nm or less wavelength.
In the present embodiment, the detection light beam (the first detection light beam 101 and/or the second detection light beam 102) is infrared light,
Such as wavelength is the infrared light of 800nm~1000nm；The backlight beam 103 is visible light.Due to detection light beam and backlight light
Beam 103 is respectively infrared light and visible light, so biological characteristic detection mould group 2 passes through the external portion's object of detection light beam
Collecting biological feature information when do not influence the backlight beam be provided to a display panel for show illumination.
In one change embodiment of embodiment illustrated in fig. 4, shown reflector plate 110 can be the multilayer for including overlapping setting
Niobium pentaoxide layer and multi-layer silica dioxide layer.
In the present embodiment, above-mentioned other embodiments or change embodiment, the transmitting unit 21, receiving unit 22 can be set
It sets below the reflector plate 110, the first detection light beam 101 and the second detection light beam 102 penetrate the reflector plate 110 respectively.
In the present embodiment, above-mentioned other embodiments or change embodiment, the transmitting unit 21 can be not arranged in described
110 lower section of reflector plate, receiving unit 22 can be set below the reflector plate 110, and the first detection light beam 101 does not need to penetrate
The reflector plate 110 simultaneously directly reaches in external object, and the second detection light beam 102 reflected by external object penetrates the reflection
Piece 110 is received the reception of unit 22.For example, the backlight mould above the reflector plate 110 can be set in the transmitting unit 21
In group 10；Or the transmitting unit 21 may be provided at 10 top of backlight module, be located at the backlight module 10 and liquid crystal
Between display panel 11；Or the side except the backlight module 10 and liquid crystal display panel 11 is arranged in the transmitting unit 21
Side.In the present embodiment, above-mentioned other embodiments or change embodiment, the position that the biological characteristic detection mould group 2 is arranged is corresponding
Among 11 bottom of liquid crystal display panel or the biological characteristic detects the position that mould group 2 can also have other different
Setting, the present invention is with no restriction.
Referring to Fig. 5, the transmitting unit 21 is arranged described in a change embodiment of electronic device shown in Fig. 1
In the part drops non-display area at the top of liquid crystal display panel 11 (this display panel is logical be referred to colloquially as " water droplet screen " or
" beauty's point ").The transmitting unit 21 is located at below a glass cover-plate (not shown), and the glass cover-plate covers the liquid crystal
Display panel 11 and the transmitting unit 21.The receiving unit 22 is arranged below the backlight module 10.At this point, the electricity
Sub-device can be used in face detection and identification.
Referring to Fig. 6, in a change embodiment of electronic device shown in Fig. 1, the transmitting unit 21 and receiving unit
22 are all disposed within 10 lower section of backlight module, and the electronic device can be used in fingerprint or face detection and identification at this time.
Therefore, in the present embodiment, above-mentioned other embodiments or change embodiment, the backlight module 10 meets: to directive
Backlight beam reflection of the backlight module 10 adjacent to biological characteristic detection 2 side of mould group and the backlight module described in directive
The 10 backlight beam divergings far from biological characteristic detection 2 side of mould group.And the detection light beam can penetrate the backlight
Mould group 10, either backlight module 10 described in directive detect backlight mould described in 2 side of mould group or directive adjacent to the biological characteristic
Group 10 detects 2 side of mould group far from the biological characteristic.
In the present embodiment, above-mentioned other embodiments or change embodiment, the liquid crystal display panel 11 may include opposite sets
The liquid crystal layer between two substrate is arranged in the two substrates set, the multiple thin film transistor (TFT) (Thin being disposed on the substrate
Film Transistor, TFT), multiple grid lines, multiple data lines, multiple pixel electrodes, color filter film etc., and its formed
The multiple pixel units and data drive circuit in array distribution, sequential control circuit, power circuit etc..
The present invention is above-mentioned or changes in embodiment, and the reflector plate 110 can also be by mixing wherein to visible light height
It scatters and the particle of infrared light high transmission is realized；Or the reflector plate 110 can also be covered by surface on it or lower surface
It covers and particle of the visible light height scattering to infrared light high transmission is realized；Or the reflector plate 110 can also pass through table on it
Face or lower surface carry out chemical etching or mechanical grinding processes the micro- surface to be formed to the scattering of visible light height to infrared light high transmission
Structure.High transmission described here refers to that transmitance is greater than 80%, and high reflection refers to that reflectivity is greater than 90%.
The present invention is above-mentioned or changes in embodiment, and 110 lower surface of reflector plate is equipped with anti-reflection film, can further increase
Transmitance of the reflector plate 110 to the detection light beam of infrared light.
The present invention is above-mentioned or changes in embodiment, and electronic device can be mobile phone, and tablet computer, smartwatch, enhancing is now
Reality/virtual reality device, human action detection device, autonomous driving vehicle, smart home device, security device, intelligence machine
People or other have can be used in object organisms feature detection and identification electronic device.
Compared to the prior art, electronic device of the present invention, backlight module and biological characteristic detection mould group are by using to inspection
Light beam transmission and the backlight module to backlight beam reflection and disperse function are surveyed, just can without being punched on backlight module
It realizes biological characteristic detection and the identification under screen, there is preferable whole visual effect and user experience, so that under screen of the present invention
Biological characteristic detection effect is preferable, also from the one hand reducing process costs.
Ground is changed, in some embodiments, the liquid crystal display panel 11 can also be replaced by other suitable types
Display panel, such as electronic paper display panel.
Further, the biological characteristic detection mould group 2 can also be used to carry out 3 D image drawing to the external object,
Alternatively, the close or distance etc. for sensing the external object.
It should be noted that it will be understood by those skilled in the art that without creative efforts, the present invention
Some or all of embodiment, and the deformation for some or all of embodiment, replacement, change, fractionation, combination, extension
Deng being considered as being covered by innovation and creation thought of the invention, belong to the scope of protection of the present invention.
Knot is indicated for any reference of " one embodiment ", " embodiment ", " example embodiment " etc. in the present specification
The a particular feature, structure, or characteristic for closing embodiment description is included at least one embodiment of the invention.In this explanation
This phrase that different location occurs in book might not all refer to identical embodiment.In addition, when combining any embodiment to retouch
When stating specific feature or structure, advocated, realizes this feature or knot in conjunction with the other embodiments of these embodiments
Structure is within the technical scope of those skilled in the art.
" length " that is likely to occur in description of the invention, " width ", "upper", "lower", "front", "rear", " back side ", " just
The orientation or positional relationship of the instructions such as face ", "vertical", "horizontal", " top ", " bottom ", " inside ", " outside " is based on attached drawing
Shown in orientation or positional relationship, be merely for convenience of the description embodiment of the present invention and simplify description, rather than indication or suggestion
Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this
The limitation of invention.Similar label and letter indicate similar terms in the accompanying drawings, therefore, once determined in a certain Xiang Yi attached drawing
Justice does not need then that it is further defined and explained in subsequent attached drawing.Meanwhile in the description of the present invention, term
" first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.In description of the invention
In, " a variety of " or the meaning of " plurality " is at least two or two, unless otherwise specifically defined.Description of the invention
In, it is also necessary to explanation is unless specifically defined or limited otherwise, " setting ", " installation ", " connection " shall be understood in a broad sense,
It for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be mechanical connection, be also possible to electricity
Connection；It can be and be directly connected to, be also possible to be indirectly connected with by intermediary, can be the connection inside two elements.It is right
For those skilled in the art, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Term used in claims, which should not be construed as to invent, is limited to this explanation
Specific embodiment disclosed in book.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (11)
1. a kind of biological characteristic detects mould group, which is characterized in that the biological characteristic detection mould group can penetrate a backlight mould
Group receive external object transmitting and/or reflection detection light beam, the detection light beam by the biological characteristic detection mould group or its
His light source emits in external object or the detection light beam is external object transmitting, and the detection light beam can be used in outside
Object is sensed, and the backlight module can provide backlight beam, backlight module described in directive to a liquid crystal display panel
The detection light beam of neighbouring biological characteristic detection mould group side can penetrate the backlight module, and backlight module described in directive
The backlight beam of neighbouring biological characteristic detection mould group side can be reflected by the backlight module.
2. biological characteristic according to claim 1 detects mould group, which is characterized in that the backlight module is to the backlight light
The disperse function of beam is greater than the disperse function to the detection light beam.
3. biological characteristic according to claim 1 detects mould group, which is characterized in that the backlight module includes described in transmission
The reflector plate of light beam and the reflection backlight beam is detected, the biological characteristic detection mould group is at least partially disposed on described anti-
It penetrates below piece.
4. biological characteristic according to claim 1 detects mould group, which is characterized in that the detection light beam penetrates the backlight
Transmission angle after one diffusion sheet of mould group is less than the backlight beam relative to the offset of its incident angle and penetrates the expansion
Offset of the transmission angle relative to its incident angle after discrete piece.
5. biological characteristic according to claim 1 detects mould group, which is characterized in that the biological characteristic detection mould group is at least
Part is arranged below the backlight module, and the biological characteristic detection mould group can emit detection light through the backlight module
On beam to external object, or directly on transmitting detection light beam to external object, the detection light beam is the red of wavelength 800nm or more
Outer light, the backlight beam are visible light.
6. biological characteristic according to claim 5 detects mould group, which is characterized in that the backlight module includes that can penetrate
The reflector plate of the detection light beam and the reflection backlight beam, the reflector plate is by multilayer to the detection light beam and backlight
The not exactly the same polymer superposition of the refractive index of light beam or fitting are constituted, light beam of the reflector plate to 800nm above wavelength
With 80% or more transmitance, there is 90% or more reflectivity to the light beam of 780nm or less wavelength.
7. biological characteristic according to claim 4 detects mould group, which is characterized in that the diffusion sheet is quantum dot film or receives
Rice perforated membrane.
8. biological characteristic according to claim 1 detects mould group, which is characterized in that the biological characteristic detects mould group and includes
Transmitting unit and receiving unit, it is described that the receiving unit can receive coming from for external object reflection through the backlight module
The detection light beam of transmitting unit, the transmitting unit are arranged below the reflector plate or side or are integrated in the backlight mould
In group, for the transmitting unit for emitting the detection light beam to external object, the biological characteristic detection mould group being capable of root
According to the two dimension of the detection light beam acquisition external object received or the biological information of three-dimensional to realize that biological characteristic detects
And identification.
9. a kind of backlight module, which is characterized in that can be used in biological characteristic detection mould group a method as claimed in any one of claims 1-8
The detection light beam for detecting and identifying for biological characteristic is received through the backlight module, the backlight module can be to a display
Panel provides backlight beam, and backlight module backlight module described in directive is adjacent to biological characteristic detection mould group side
The backlight beam diverging of backlight beam reflection and the backlight module described in directive far from biological characteristic detection mould group side, institute
The backlight module can be penetrated by stating detection light beam.
10. backlight module according to claim 9, which is characterized in that the backlight module includes reflector plate, sets gradually
Light guide plate and optical module on the reflector plate and the backlight that the light guide plate side is set, the backlight
For emitting backlight beam, the reflector plate is for being reflected into light guide plate for the backlight beam that backlight emits and being directed through institute
Detection light beam is stated, the light guide plate includes one and the neighbouring light-emitting surface of optical module, and the light guide plate is used for so that from its side
The backlight beam that face enters is emitted from the light-emitting surface and enters the optical module, and the optical module includes to the backlight
Beam divergence effect is greater than the diffusion sheet of the detection light beam, and the reflector plate reflects the backlight beam and penetrates the detection
Light beam.
11. a kind of electronic device, which is characterized in that including display and the biological characteristic being arranged in below display detection
Mould group, the display include backlight module and display panel, and the backlight module is arranged below the display panel, described
Biological characteristic detection mould group is at least partially disposed in below the backlight module, and the biological characteristic detection mould group is claim
Any biological characteristic of 1-8 detects mould group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910178924.3A CN109902651A (en) | 2019-03-11 | 2019-03-11 | Biological characteristic detects mould group and backlight module and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910178924.3A CN109902651A (en) | 2019-03-11 | 2019-03-11 | Biological characteristic detects mould group and backlight module and electronic device |
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| CN109902651A true CN109902651A (en) | 2019-06-18 |
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| CN201910178924.3A Withdrawn CN109902651A (en) | 2019-03-11 | 2019-03-11 | Biological characteristic detects mould group and backlight module and electronic device |
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Application publication date: 20190618 |