CN109919103A - 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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- CN109919103A CN109919103A CN201910179063.0A CN201910179063A CN109919103A CN 109919103 A CN109919103 A CN 109919103A CN 201910179063 A CN201910179063 A CN 201910179063A CN 109919103 A CN109919103 A CN 109919103A
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Abstract
The invention discloses a kind of electronic devices, one biological characteristic detection mould group can emit through the backlight module and/or receive detection light beam, the detection and identification of biological information of the detection light beam for external object, the backlight module can partially convert the wavelength of the backlight beam of specific wavelength and dissipate by the backlight beam of Wavelength-converting, and the backlight beam of different wave length is mixed into white light and is supplied to a display panel.The invention also discloses a kind of biological characteristic detection mould group and backlight modules.Biological characteristic detection mould group, backlight module and electronic device of the present invention have preferable visual effect.
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 on entire display screen and the scheme of backlight module aperture.Although this scheme can be realized the lower biological characteristic detection of screen, but need
Relative complex technique is wanted, product cost is higher, and due to needing the aperture on screen and backlight module, so that screen is whole
The visual effect of display is 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, backlight module and electronic device.
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 below the backlight module, the biological characteristic inspection
The life of external object can be used for through a backlight module transmitting and/or reception detection light beam, the detection light beam by surveying mould group
The detection and identification of object characteristic information, the backlight module can partially convert the backlight beam wavelength and diverging quilt of specific wavelength
The backlight beam of different wave length is simultaneously mixed into white light and is supplied to a display panel by the backlight beam of Wavelength-converting.
Optionally, the backlight module includes the reflector plate of neighbouring biological characteristic detection mould group, is arranged in reflector plate
On light guide plate, the backlight that light guide plate side is set, the diffusion barrier that is arranged on light guide plate, the backlight is for emitting
Visible light simultaneously enters the diffusion barrier by a light-emitting surface of the light guide plate, and a part can be entered institute by the diffusion barrier
State the light for divergently penetrating the diffusion barrier after the wavelength shift of the light beam of diffusion barrier and a part being allowed to enter the diffusion barrier
Beam is directed through.
Optionally, the biological characteristic detection mould group includes transmitting unit and receiving unit, and the biological characteristic detects mould
Group includes transmitting unit and receiving unit, and when carrying out biological characteristic detection, the detection light beam of the transmitting unit transmitting successively leads to
An optical sheet is emitted to after crossing the reflector plate, light guide plate, diffusion barrier and can be further emitted to outside backlight module, and
The detection light beam can successively pass through the optical sheet, diffusion barrier, light guide plate and reflector plate and reach after being reflected by external object
The receiving unit, the biological characteristic detection mould group acquire the two dimension or three-dimensional of external object according to the detection light beam received
Biological information to realize biological characteristic detection and identification.
Optionally, the diffusion barrier includes the lower substrate, diffusion layer and upper substrate being successively set on the light guide plate, institute
It states upper and lower substrates to be made of translucent material, the diffusion layer includes multiple diffusion particles for changing light beam wavelength, into institute
The detection light beam for stating diffusion layer can be by the interval between the diffusion particle through the diffusion layer, into the diffusion layer
A part of visible light beam of backlight transmitting the diffusion layer, another portion are penetrated by the interval between the diffusion particle
Point by the diffusion particle its wavelength is elongated and after shooting angle is dissipated through the diffusion layer.
Optionally, the backlight can emit blue light or ultraviolet light, and the diffusion particle can will come from backlight
A part of blue light in source is converted to red light and green light, and red light and green light after converting and is not converted
Blue light can be mixed into white light；Or the diffusion particle ultraviolet light from backlight can be converted to red light,
Green light and blue light, red light, green light and blue light after the conversion can be mixed into white light.
Optionally, the detection light beam includes infrared light, and the reflector plate can reflect visible light and transmitted infrared light, institute
It states reflector plate and biological characteristic detection mould group is close to or interval setting.
Optionally, the biological characteristic detection mould group includes transmitting unit and receiving unit, and the transmitting unit can be saturating
Cross the reception on a backlight module transmitting detection light beam to external object or directly on transmitting detection light beam to external object
Unit can receive the detection light beam reflected by external object through the backlight module, and the backlight module is to backlight light
The diffusion of beam is greater than the diffusion to the detection light beam.
Optionally, biological characteristic detection mould group includes transmitting unit and receiving unit, the transmitting unit transmitting
Detection light beam is received by the backlight module by the receiving unit after capable of being reflected by external object.
Optionally, the receiving unit is arranged below a backlight module；The transmitting unit is arranged described
Below backlight module, perhaps setting is perhaps integrated in the backlight module in the backlight module side or is arranged in institute
It states above backlight module.
Optionally, at least there is on the liquid crystal display panel projection in the transmitting unit, and the projection is at least
A part of and described backlight module is non-overlapping on the projecting direction.
Optionally, the backlight module further includes the optical sheet being arranged on the diffusion barrier, and the optical sheet can incite somebody to action
Through the different wave length of diffusion barrier backlight beam uniformly mixed and assembled after form white light.
One aspect of the present invention discloses a kind of biological characteristic detection mould group, and the biological characteristic detection mould group is above-mentioned
The biological characteristic of electronic device detects mould group, can receive through the backlight module of electronic device and/or transmitting is for biology
The detection light beam of feature detection, the backlight module can partially convert the backlight beam wavelength of specific wavelength and diverging is converted
The backlight beam of different wave length is simultaneously mixed into white light and is supplied to a display panel by the backlight beam of wavelength.
One aspect of the present invention discloses a kind of backlight module, and the backlight module is the backlight of above-mentioned electronic device
The biological characteristic detection mould group of mould group, the electronic device can be emitted and/or be connect by the backlight module and display panel
Detection light beam is received to realize detection and identification to external object organisms characteristic information, the backlight module can be used in will
The backlight beam of shorter wavelength in it becomes the backlight beam for the longer wavelength for having different and by the back of the different wave length
While light light beam is mixed into white light and is supplied to the display panel, allow the detection light beam transmission.
Compared to the prior art, electronic device and biological characteristic detection mould group of the present invention has by using to detection light beam
The backlight module of good transmitance, without punching the biological characteristic being just able to achieve under screen detection on backlight module and knowing
Not, there is preferable whole visual effect and user experience, also from the one hand reducing process costs.In addition, the present invention passes through
Biological characteristic detection mould group, which is arranged in, can change backlight beam wavelength and then improve the white light of diverging and can penetrate inspection
It surveys below the backlight module of light beam, can preferably emit and/or receive detection light beam by backlight module, so that the lower biology of screen
Feature detection effect is preferable.
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 diffusion barrier partial cutaway schematic view of embodiment illustrated in fig. 1；
Fig. 4 is the reflector plate transmittance curve schematic diagram of one embodiment of the present of invention；
Fig. 5 is the schematic diagram of one embodiment of the present of invention；
Fig. 6 is the schematic diagram of one embodiment of the present of invention.
Specific embodiment
In the specific descriptions to the embodiment of the present invention, it should be understood that when substrate, frame, piece, layer or pattern are referred to as
When "above" or "below" another substrate, another piece, another layer or another pattern, it can " directly " or " indirectly "
On another substrate, another piece, another layer or another pattern, or there may also be one or more middle layers.
For purposes of clarity, it each of can exaggerate, omit or schematically show Figure of description the thickness of layer and big
It is small.In addition, the size of element and non-fully reflecting actual size in attached drawing.
An embodiment provides a kind of electronic devices, including display and setting are below the display
Biological characteristic detect mould group, the display includes backlight module and display panel, and the backlight module setting is described aobvious
Show that below the panel, the biological characteristic detection mould group are at least partially disposed below the backlight module, the biological characteristic
Detecting mould group can be through a backlight module transmitting and/or reception detection light beam, and the detection light beam is for external object
The detection and identification of biological information, the backlight module can partially convert backlight beam wavelength and the diverging of specific wavelength
By the backlight beam of Wavelength-converting and the backlight beam of different wave length is mixed into white light it is supplied to a display panel.It is described
Backlight module includes the reflector plate of neighbouring biological characteristic detection mould group, the light guide plate being arranged on reflector plate, is arranged and is leading
The backlight of tabula rasa side, the diffusion barrier being arranged on light guide plate, the backlight is for emitting backlight beam and by described
One light-emitting surface of light guide plate enters the diffusion barrier, and a part can be entered the light beam of the diffusion barrier by the diffusion barrier
It is divergently directed through through the diffusion barrier and the light beam for allowing a part to enter the diffusion barrier after wavelength shift.
The biological characteristic detection mould group includes transmitting unit and receiving unit, when carrying out biological characteristic detection, the hair
The detection light beam for penetrating unit transmitting passes sequentially through the reflector plate, light guide plate, diffusion barrier and optical sheet and is emitted to the backlight mould
Group is external, and successively reaches the reception by the optical sheet, diffusion barrier, light guide plate and reflector plate after being reflected by external object
Unit, the biological characteristic detection mould group are special according to the two dimension of the detection light beam acquisition external object received or the biology of three-dimensional
Reference breath.
The diffusion barrier includes the lower substrate, diffusion layer and upper substrate being successively set on the light guide plate, described upper and lower
Substrate is made of translucent material, and the diffusion layer includes multiple diffusion particles for changing light beam wavelength, into the diffusion
The detection light beam of layer can penetrate the diffusion layer by the interval between the diffusion particle, into the backlight of the diffusion layer
A part of the visible light beam of source transmitting penetrates the diffusion layer by the interval between the diffusion particle, and another part is by institute
State diffusion particle its wavelength is elongated and after shooting angle is dissipated through the diffusion layer.
In the present embodiment, the detection light beam can be infrared light, and the reflector plate can reflect visible light and transmission is red
Setting is close to or is spaced to outer light, the reflector plate and biological characteristic detection mould group.The backlight can emit blue light or purple
Outer light, a part of blue light from backlight can will be converted to red light and green light by the diffusion particle, and be turned
Red light and green light after changing and the blue light that do not converted can be mixed into white light；Or the diffusion particle can
Ultraviolet light from backlight is converted into red light, green light and blue light, red light, green light and indigo plant after the conversion
Coloured light can be mixed into white light.
Other embodiments of the invention additionally provide a kind of biological characteristic detection mould group, and the biological characteristic detection mould group is upper
The biological characteristic detection mould group for stating electronic device, can receive through the backlight module of electronic device and/or emit for giving birth to
The detection light beam of object feature detection, the backlight module can partially convert the backlight beam wavelength of specific wavelength and diverging is turned
It changes the backlight beam of wavelength and the backlight beam of different wave length is mixed into white light and be supplied to a display panel.
Other embodiments of the invention additionally provide a kind of backlight module, and the backlight module is the back of above-mentioned electronic device
Optical mode group, the electronic device biological characteristic detection mould group can by the backlight module and display panel transmitting and/or
Detection light beam is received to realize detection and identification to external object organisms characteristic information, the backlight module can be used in
The backlight beam for the longer wavelength for becoming the backlight beam of the shorter wavelength in it to have different and by the different wave length
While backlight beam is mixed into white light and is supplied to the display panel, allow the detection light beam transmission.
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
The neighbouring backlight module 10 is arranged below the backlight module 10.The biological characteristic detection mould group 2 is at least partly set
It sets below the backlight module 10.The biological characteristic detection mould group 2 can emit and/or receive through liquid crystal display 1
Detect light beam.
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, transmitting unit 21 and 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 the backlight module side,
Perhaps it is integrated in the backlight module 10 or is arranged above the backlight module 10.Such as, but not limited to, the hair
It penetrates unit 21 and the interval of the backlight module 10 or is close to be arranged in 10 side of backlight module.The side includes but unlimited
In upper side or side-lower or part side etc., side here can be regarded as the transmitting unit 21 in the liquid crystal display
At least there is a projection on panel 11, at least part of the projection and the backlight module are on the projecting direction without weight
It is folded.In another example setting of the liquid crystal display panel 11 without juxtaposition described in the transmitting unit 21, for example, with the liquid crystal display
The substantially concordant setting of panel 11 is below a glass cover-plate.
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 in the backlight module side or top or the transmitting unit；It is described to connect
Unit 22 is received to be arranged below the backlight module 10.
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 is located at below a glass cover-plate (not shown), and the glass cover-plate covers the liquid crystal
Show panel 11 and the transmitting unit 21.The receiving unit 22 is arranged below the backlight module 10.At this point, the electronics
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.
The biological characteristic detection mould group 2 can emit through backlight module 10 and/or receive detection light beam.The transmitting
Unit 21 can be detected through the backlight module 10 transmitting on light beam to external object or directly transmitting detects light beam to outside
On object, the receiving unit 22 can receive the detection light beam reflected by external object through the backlight module 10.
The receiving unit 22 can also receive other light beams of external object transmitting or reflection by the backlight module 10.The back
Optical mode group 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 through 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 through 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
The receiving unit 22 is reached after penetrating 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 the first detection of transmitting unit transmitting light beam 101, the receiving unit 22 receives the second detection light beam 102, the biology
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 is outer
Portion's 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.
The biological characteristic detection mould group 2 can be obtained by the second light beam 102 of the reflection of acquisition external object or transmitting
The two-dimensional image information of external object or biological information.The biological characteristic detection mould group 2 can also include processor (figure
Do not show), the processor can calculate the second detection light beam 102 about the offset of the first detection light beam 101 and then obtain
The depth information of external object.Further, biological information data, the processor energy is also stored in advance in the processor
It is enough to be carried out by the two-dimensional signal and/or depth information of the external object that obtained and pre-stored biological information data
It compares, to realize the biological characteristic detection and identification of external object, such as, but not limited to: fingerprint recognition, face recognition, iris
Identification 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 150 that light guide plate side is arranged in, the diffusion barrier 130 being arranged on light guide plate 120 and setting are in the diffusion barrier
Optical sheet 140 on 130.The backlight 150 is used to emit backlight beam and passes through a light-emitting surface of the light guide plate 120
(light guide plate 120 is adjacent to surface of the diffusion barrier 130 in Fig. 2) enters the diffusion barrier 130.The diffusion barrier 130 can incite somebody to action
Enter institute through the diffusion barrier 130 and permission are a part of after the wavelength shift of a part of light beam for entering the diffusion barrier 130
The light beam for stating diffusion barrier 130 is directed through.Such as: the backlight beam of shorter wavelength can be become having by the diffusion barrier 130
The backlight beam of different longer wavelengths.The backlight module 10 can partially convert the backlight beam of specific wavelength wavelength and
Diverging is by the backlight beam of Wavelength-converting.
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 diffusion barrier 130 that the light beam and the backlight 150 that source 150 emits emit, can be with
Indicate the white light formed after the backlight beam mixing of different wave length.The effect of all these backlight beams is provided to described
Illuminating bundle needed for liquid crystal display panel 11 provides display.
After the optical sheet 140 enables to the backlight beam through the different wave length of diffusion barrier 130 uniformly to mix, assemble
White light is formed, and is supplied to liquid crystal display panel 11 as display illumination.
In the embodiment or change embodiment, the optical sheet 140 may include one or more for homogenizer
Mixed diffusion sheet, it is perhaps one or more to include expansion for light beam convergence, the brightening piece of blast or the optical sheet 140
The combination of discrete piece and brightening piece.
In the embodiment and change embodiment, the optical sheet 140 may include one or more for homogenizer
Mixed diffusion sheet (Diffusion Film, DF), or one or more brightening pieces for light beam convergence, blast
The combination of (Brightness Enhancement Film, BEF) or the diffusion sheet and brightening piece.Such as the optics
Piece 140 may include the lower diffusion sheet set gradually from bottom to up, lower brightening piece and upper brightening piece；Or the optical sheet 140
Including lower diffusion sheet, lower brightening piece, upper diffusion sheet and the upper brightening piece set gradually from bottom to up.Knot about optical sheet 140
Structure and composition, description of the invention and attached drawing only schematically illustrate, and it is fixed to be not limited thereto.
In the present embodiment, the optical sheet 140 illustrated in Fig. 1 comprising the lower brightening piece on diffusion barrier 130 is set
141 and the upper brightening piece 142 that is arranged on the lower prism 141.The reflector plate 110 is used for the back for emitting backlight 150
Light light beam is reflected into light guide plate 120, and the light guide plate 120 includes one and the neighbouring light-emitting surface of diffusion barrier 130, the light guide plate
120 are emitted for the backlight beam that backlight 150 emits to be formed area source from the light-emitting surface.The reflector plate 110 and institute
It states biological characteristic detection mould group 2 and is close to or is spaced setting.
In the present embodiment, first light beam 101, the second light beam 102 be black light, preferably wave band be 850~
Infrared light between 1000 nanometers (nm).Other are changed in embodiment, and first light beam 101, the second light beam 102 can be
Visible light, black light, ultraviolet light, infrared light, ultrasonic wave, the medium one or more of electromagnetic wave.
In embodiment of the present invention or change embodiment, the first detection light beam 101 or the second detection light beam 102 can
Think floodlight, pattern light, coded structured light is one or more in modulated pulse signal.
In this hair embodiment or change embodiment, 21 quantity of transmitting unit of the biological characteristic detection mould group 2 can
Think one or more, the quantity of the receiving unit 22 can be one or more, the transmitting unit 21 and receiving unit
It can be based on flight time (Time of Flight, TOF) between 22, structure light (Structured Light), binocular tri-dimensional
Feel that technologies such as (Binocular Stereo Vision) are used to draw the two dimension and/or 3-D image of external object, or acquisition
With the two dimension and/or three dimensional biological characteristic information of identification external object, such as fingerprint recognition or face recognition under shielding.
In embodiment of the present invention or change embodiment, the transmitting unit 21 may include vertical cavity surface-emitting laser
Device (Vertical Cavity Surface Emitting Laser, VCSEL) or light emitting diode (LED) or other classes
Type luminescence chip.The receiving unit 22 may include infrared image sensor, can receive infrared beam and be converted to correspondence
Electric signal.Other are changed in embodiment, and the receiving unit 22 can be visible light image sensor or other types photoelectricity
Conversion chip.
Change embodiment in, the liquid crystal display 1 be also possible to the non-spontaneous optical display unit of other types or other
Self-emitting display, liquid crystal display panel 11 are also possible to other types display panel.System that the present invention is not limited thereto.
Referring to Fig. 3, being the schematic diagram of the section structure of the part amplification of the diffusion barrier 130.The diffusion barrier 130 includes
Lower substrate 131, diffusion layer 132 and the upper substrate 133 being successively set on the light guide plate 120.The setting of diffusion layer 132 exists
Between the upper substrate 133 and lower substrate 131, the upper substrate 133 and lower substrate 131 are for protecting the diffusion layer 132.
The upper and lower substrates can be used translucent material flexible and be made.The diffusion layer 132 includes multiple for changing light beam wavelength
Diffusion particle 134, the diffusion example 134 is evenly distributed in the diffusion layer.
Enter detection light beam (i.e. the first detection light of the diffusion layer 132 by lower substrate 131 or the upper substrate 133
Beam 101 or the second detection light beam 102) diffusion layer 132 can be penetrated by the interval between the diffusion particle 134, and
It further can be emitted to external by upper substrate 133 or the receiving unit 22 is entered by lower substrate 131.
A part into the backlight beam 103 of the diffusion layer 132 emitted from backlight 150 passes through the diffusion
Interval between particle 134 penetrates the diffusion layer 132, and another part is elongated by its wavelength by the diffusion particle 134 and incites somebody to action
The diffusion layer 132 is penetrated after shooting angle diverging.
The backlight 150 includes luminescence unit 151.The luminescence unit 151 may be provided on a circuit board 152.
The luminescence unit 152 can be light emitting diode (LED), and the luminescence unit 152 can be used in emitting blue light or ultraviolet
Light.
In the present embodiment, the backlight 150 can emit blue light, and the diffusion particle 134 can will come from back
A part of blue light (backlight beam 103 in Fig. 3) of light source 150 is converted to red light and green light, and the red after conversion
Light and green light and the blue light that do not converted can be mixed into white light, as shown in Figure 3.
In the change embodiment of the present embodiment, the backlight 150 can emitting ultraviolet light, 134 energy of diffusion particle
It is enough that the ultraviolet light from backlight 150 is converted into red light, green light and blue light, red light, green after the conversion
Light and blue light can be mixed into white light.
In the embodiment or change embodiment, the diffusion particle 134 is quantum dot, and the quantum dot includes nanocrystalline
Core and the nanocrystalline shell for wrapping up the nanocrystal, wavelength is elongated after light beam enters the nanocrystal, the quantum dot it is straight
Diameter range is 1nm~10nm.
In other embodiments of the invention, the diffusion barrier 130 is quantum dot film, has and changes light beam wavelength and diverging light
The optical characteristics on road, such as can be elongated by a part of wavelength of incident blue light, be converted to red light and green light.It is described
Quantum dot film is not less than 50% to the transmitance of infrared light.
In the embodiment or change embodiment, the diffusion barrier 130 can partially convert the backlight beam of specific wavelength
Wavelength and diverging by the backlight beam of Wavelength-converting.
Referring to Fig. 4, be in a change embodiment of the invention, a kind of transmitance of reflector plate to different-waveband light beam
Curve.Reflector plate 110 in the reflector plate and above-described embodiment is made of identical material and technique.Therefore, the reflector plate
110 pairs of visible lights can have preferable transmitance, wave-length coverage 900nm~1000nm (nm table to infrared light close to fully reflective
Show nanometer) between infrared light transmittance reach maximum.
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 the position that the biological characteristic detection mould group 2 is arranged corresponds to the liquid crystal
Among 11 bottom of display panel or biological characteristic detection mould group 2 can also have different location setting, and the present invention is not
It is restricted.
The present invention is above-mentioned or changes in embodiment, and the liquid crystal display panel 11 may include the two substrates being oppositely arranged, if
The liquid crystal layer between two substrate is set, multiple thin film transistor (TFT)s for being disposed on the substrate (Thin Film Transistor,
TFT), multiple grid lines, multiple data lines, multiple pixel electrodes etc., and its multiple pixel units in array distribution formed,
And data drive circuit, sequential control circuit, power circuit etc..
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 and biological characteristic detection mould group of the present invention has by using to detection light beam
The backlight module of good transmitance, without punching the biological characteristic being just able to achieve under screen detection on backlight module and knowing
Not, there is preferable whole visual effect and user experience, also from the one hand reducing process costs.In addition, the present invention passes through
Biological characteristic detection mould group, which is arranged in, can change backlight beam wavelength and then improve the white light of diverging and can penetrate inspection
It surveys below the backlight module of light beam, can preferably emit and/or receive detection light beam by backlight module, so that the lower biology of screen
Feature detection effect is preferable.
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 for example can also be used for or can also be used to sense connecing for external object
Close or distance, the 3-D image of external object draw etc..
Ground is changed, in some embodiments, above-mentioned brightening piece or prismatic lens also can choose and are omitted.
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 (13)
1. 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 below the backlight module, and the biological characteristic detection mould group can penetrate
The backlight module transmitting and/or reception detection light beam, the inspection of biological information of the detection light beam for external object
It surveys and identification, the backlight module can partially convert the backlight beam wavelength of specific wavelength and dissipate by the backlight of Wavelength-converting
The backlight beam of different wave length is simultaneously mixed into white light and is supplied to the display panel by light beam.
2. electronic device according to claim 1, which is characterized in that the backlight module includes the neighbouring biological characteristic
The reflector plate for detecting mould group, the backlight that light guide plate side is arranged in, is arranged in light guide plate the light guide plate being arranged on reflector plate
On diffusion barrier, the backlight is for emitting backlight beam and by a light-emitting surface of the light guide plate into the diffusion
Film, the diffusion barrier will can divergently penetrate the diffusion barrier after the wavelength shift of a part of light beam for entering the diffusion barrier
It is directed through with the light beam for allowing a part to enter the diffusion barrier.
3. electronic device according to claim 2, which is characterized in that the biological characteristic detection mould group includes transmitting unit
And receiving unit, when carrying out biological characteristic detection, the detection light beam of the transmitting unit transmitting passes sequentially through the reflector plate, leads
It is emitted to an optical sheet after tabula rasa, diffusion barrier and can further be emitted to outside backlight module, and the detection light beam quilt
The optical sheet, diffusion barrier, light guide plate and reflector plate can successively be passed through after external object reflection and reach the receiving unit, institute
Biological characteristic detection mould group is stated according to the two dimension of the detection light beam acquisition external object received or the biological information of three-dimensional
To realize biological characteristic detection and identification.
4. electronic device according to claim 2, which is characterized in that the diffusion barrier includes being successively set on the leaded light
Lower substrate, diffusion layer and upper substrate on plate, the upper and lower substrates are made of translucent material, and the diffusion layer includes multiple use
In the diffusion particle for changing light beam wavelength, the detection light beam into the diffusion layer can be by between the diffusion particle
Every penetrating the diffusion layer, a part into the backlight beam of the backlight transmitting of the diffusion layer passes through the diffusion particle
Between interval penetrate the diffusion layer, another part is elongated by its wavelength and after dissipating shooting angle by the diffusion particle
Through the diffusion layer.
5. electronic device according to claim 4, which is characterized in that the backlight can emit blue light or ultraviolet
A part of blue light from backlight can be converted to red light and green light by light, the diffusion particle, and after conversion
Red light and green light and the blue light that do not converted can be mixed into white light；Or the diffusion particle can be in the future
Red light, green light and blue light are converted to from the ultraviolet light of backlight, red light, green light and blue light after the conversion
White light can be mixed into.
6. electronic device according to claim 2, which is characterized in that the detection light beam includes infrared light, the reflection
Piece can reflect visible light and transmitted infrared light, and setting is close to or is spaced to the reflector plate and biological characteristic detection mould group.
7. electronic device according to claim 1, which is characterized in that the biological characteristic detection mould group includes transmitting unit
And receiving unit, the transmitting unit can be detected through backlight module transmitting on light beam to external object or directly transmitting
It detects on light beam to external object, the receiving unit can be received through the backlight module described in external object reflection
Light beam is detected, the backlight module is greater than the diffusion to the detection light beam to the diffusion of backlight beam.
8. electronic device according to claim 1, which is characterized in that the biological characteristic detection mould group includes transmitting unit
And receiving unit, the detection light beam of the transmitting unit transmitting pass through the backlight module by institute after capable of being reflected by external object
State receiving unit reception.
9. electronic device according to claim 8, which is characterized in that the receiving unit is arranged under the backlight module
Side；The transmitting unit is perhaps arranged below the backlight module perhaps setting in the backlight module side or integrates
In the backlight module, or it is arranged above the backlight module.
10. electronic device according to claim 8, which is characterized in that the transmitting unit is on said display panel extremely
There is a projection less, at least part of the projection and the backlight module are non-overlapping on the projecting direction.
11. electronic device according to claim 2, which is characterized in that the backlight module further includes being arranged in the expansion
The optical sheet on film is dissipated, the backlight beam that the optical sheet can will transmit through the different wave length of diffusion barrier is uniformly mixed and understood
White light is formed after poly-.
12. a kind of biological characteristic detects mould group, which is characterized in that the biological characteristic detection mould group is claim 1~11 times
The biological characteristic of electronic device described in one detects mould group, can receive and/or emit through the backlight module of electronic device
For the detection light beam of biological characteristic detection, the backlight module can partially convert the backlight beam wavelength and hair of specific wavelength
It dissipates the backlight beam by Wavelength-converting and the backlight beam of different wave length is mixed into white light and be supplied to display panel.
13. a kind of backlight module, which is characterized in that the backlight module is any electronic device of claim 1~11
Backlight module, the electronic device biological characteristic detection mould group can pass through the backlight module and display panel transmitting
And/or detection light beam is received to realize detection and identification to external object organisms characteristic information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910179063.0A CN109919103A (en) | 2019-03-11 | 2019-03-11 | Biological characteristic detects mould group and backlight module and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910179063.0A CN109919103A (en) | 2019-03-11 | 2019-03-11 | Biological characteristic detects mould group and backlight module and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109919103A true CN109919103A (en) | 2019-06-21 |
Family
ID=66964099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910179063.0A Withdrawn CN109919103A (en) | 2019-03-11 | 2019-03-11 | Biological characteristic detects mould group and backlight module and electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109919103A (en) |
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| WO2020181444A1 (en) * | 2019-03-11 | 2020-09-17 | 深圳阜时科技有限公司 | Biological characteristic detection module, backlight module, display, and electronic device |
| WO2020258767A1 (en) * | 2019-06-28 | 2020-12-30 | 深圳市隆利科技股份有限公司 | Quantum dot backlight module and electronic device |
| WO2021051752A1 (en) * | 2019-09-16 | 2021-03-25 | 神盾股份有限公司 | Backlight module applied to display panel |
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