CN109709712A - A kind of backlight module, display device and electronic equipment - Google Patents
A kind of backlight module, display device and electronic equipment Download PDFInfo
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- CN109709712A CN109709712A CN201910041459.9A CN201910041459A CN109709712A CN 109709712 A CN109709712 A CN 109709712A CN 201910041459 A CN201910041459 A CN 201910041459A CN 109709712 A CN109709712 A CN 109709712A
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Abstract
The application is suitable for optics and electronic technology field, provides a kind of backlight module comprising light guide plate, reflector plate, optical film layer group, sensing device and sensing light source.The light guide plate includes light-emitting surface and the bottom surface opposite with light-emitting surface.The reflector plate is arranged on the bottom surface of light guide plate.The optical film layer group is arranged on the light-emitting surface of light guide plate.It offers in the optical film layer group through through-hole.The sensing device and sensing light source setting are below the reflector plate at position corresponding with the through-hole.The light sensing that the sensing light source issues is projected from the through-hole to a sensing object through after reflector plate and light guide plate, and is back to sensing device by through-hole again after the sensing object reflection and is carried out feature sensing.
Description
Technical field
The application belongs to optical technical field more particularly to a kind of backlight module, display device and electronic equipment.
Background technique
Currently, being intended to pursue increasing screen accounting for the electronic equipment consumer with display function, to expect
Screen shows brought ultimate attainment visual enjoyment comprehensively for experience.However, existing electronic equipment is needed toward contact in the aobvious of display screen
Show and multiple and different functional module groups is set in regional scope to realize the other function in addition to display, to occupy original
Display area.In order to improve screen accounting, need for the functional module group to be arranged in inside screen, and current display device structure
In there is no extra space that can accommodate the functional module group.
Summary of the invention
The application provides a kind of backlight module, display device and electronic equipment to solve the above technical problems.
The application embodiment provides a kind of backlight module comprising light guide plate, reflector plate, optical film layer group, sensing dress
Set and sense light source.The light guide plate includes light-emitting surface and the bottom surface opposite with light-emitting surface.The reflector plate is arranged in light guide plate
Bottom surface side.The optical film layer group is arranged on the light-emitting surface of light guide plate.It is offered in the optical film layer group through logical
Hole.The sensing device and sensing light source are arranged below reflector plate.The light sensing that the sensing light source issues is through reflection
It projects from the through-hole to a sensing object after piece and light guide plate, and is back to again by through-hole after the sensing object reflection
Sensing device.Wherein, the sensing light source includes light-emitting component and optical scattering structure, and the optical scattering structure setting is in the member that shines
On the light-emitting surface of part, the light for issuing to the light-emitting component is diffused.
In some embodiments, the light sensing that the sensing light source issues is infrared or near infrared light, wavelength model
Enclose is 800 nanometers to 1650 nanometers.
In some embodiments, the sensing light source further includes pedestal, and the pedestal includes the supporting surface towards through-hole,
The light-emitting component is arranged on the supporting surface to issue light sensing towards through-hole.
In some embodiments, the beam spread that the direction that the optical scattering structure is used to issue light-emitting component is concentrated
It is in the light sensing of diffusing reflection effect at even intensity distribution.
In some embodiments, the optics diffusion structure can be the optics diffusion being plated on light-emitting component light-emitting surface
Film or the optical diffusion sheet being arranged on light-emitting component light-emitting surface.
In some embodiments, the pedestal of the sensing light source is the annular solid for surrounding the sensing device, institute
It states sensing device and is located at the center of the pedestal and by the base ring around the light-emitting component is arranged on the pedestal and closes
It is symmetrical in sensing device.
In some embodiments, the pedestal is wedge shape, the right-angle surface to intersect vertically including two and a connection institute
State the supporting surface of two right-angle surfaces.
In some embodiments, the sensing light source is two or more, and the sensing light source is about the biography
Induction device is symmetrical.
In some embodiments, the optical film layer group includes diffusion sheet and brightening piece, and the diffusion sheet setting is being led
On the light-emitting surface of tabula rasa, the light emission side of diffusion sheet is arranged in the brightening piece.
The application embodiment provides a kind of display device with biological characteristic identification function comprising such as any of the above-described
Backlight module provided by embodiment and the liquid crystal display panel that the backlight module light emission side is set.The sensing light source
The light sensing issued penetrates the sensing that liquid crystal display panel carries out biological characteristic after being pierced by backlight module from through-hole.
The application embodiment provides a kind of electronic equipment comprising what at least one above embodiment provided has life
Backlight module described in any one of display device or above embodiment of object feature identification function.
Backlight module provided by the application embodiment, the display device with biological characteristic identification function and electronics are set
Sensing mould group is arranged to realize the identification of biological characteristic in the standby corresponding position by offering through-hole in backlight module, so as to
The functional module group that panel front was originally arranged in is hidden in below screen under the premise of not influencing screen and completely showing, into one
Step improves screen accounting, realizes really screen display comprehensively.
The additional aspect and advantage of the application embodiment will be set forth in part in the description, partially will be from following
Become obvious in description, or is recognized by the practice of the application embodiment.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the backlight module that the application first embodiment provides.
Fig. 2 is another structural schematic diagram that light source base is sensed described in Fig. 1.
Fig. 3 is the structural schematic diagram for the backlight module that the application second embodiment provides.
Fig. 4 is the top view that light source and sensing device structure are sensed described in Fig. 2.
Fig. 5 is the top view that light source and sensing device another kind structure are sensed described in Fig. 2.
Fig. 6 is the structural schematic diagram for the backlight module that the application third embodiment provides.
Fig. 7 is the top view that light source and sensing device structure are sensed described in Fig. 6.
Fig. 8 is the structural schematic diagram for the display device that the 4th embodiment of the application provides.
Fig. 9 is the structural schematic diagram for the electronic equipment that the 5th embodiment of the application provides.
Specific embodiment
Presently filed embodiment is described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the application, and should not be understood as the limitation to the application.?
In the description of the present application, it is to be understood that term " first ", " second " are only used for describing, and should not be understood as instruction or dark
Show relative importance or implicitly indicates the quantity of indicated technical characteristic or put in order.Define as a result, " first ",
The technical characteristic of " second " can explicitly or implicitly include one or more technical characteristic.In retouching for the application
In stating, the meaning of " plurality " is two or more, unless otherwise specifically defined.
In the description of the present application, it should be noted that unless otherwise specific regulation or limit, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integration connection;It can
To be mechanical connection, it is also possible to be electrically connected or is in communication with each other;It can be directly connected, the indirect phase of intermediary can also be passed through
Even, the connection inside two elements or the interaction relationship between two elements be can be.For the ordinary skill of this field
For personnel, the concrete meaning of above-mentioned term in this application can be understood as the case may be.
Following disclosure provides many different embodiments or example is used to realize the different structure of the application.In order to
Simplify disclosure herein, hereafter only to the component of specific examples and being set for describing.Certainly, they are merely examples, and
And purpose does not lie in limitation the application.In addition, the application can reuse reference number and/or reference word in different examples
Mother, this reuse are itself not indicate the various embodiments discussed to simplify and clearly state the application
And/or the particular kind of relationship between setting.In addition, the application in the following description provided by various specific techniques and material only
For the example for realizing technical scheme, but those of ordinary skill in the art should be aware that the technical solution of the application
It can be realized by other techniques for not describing hereafter and/or other materials.
Further, described feature, structure can be incorporated in one or more embodiment party in any suitable manner
In formula.In the following description, many details are provided so as to fully understand presently filed embodiment.However, this
Field technical staff will be appreciated that even if without one or more in the specific detail, or using other structures, group
Member etc. can also practice the technical solution of the application.In other cases, it is not shown in detail or describes known features or operation
To avoid the emphasis of fuzzy the application.
As shown in Figure 1, the application first embodiment provides a kind of backlight module 1, for being correspondingly arranged sense under screen
Mould group is surveyed to sense with the biological characteristic to a sensing object.The backlight module 1 include back light 10, light guide plate 12,
Reflector plate 14, optical film layer group 16, sensing light source 15 and sensing device 17.The light guide plate 12 include light-emitting surface 120 and with go out
The opposite bottom surface 122 of smooth surface 120.The reflector plate 14 is arranged on the bottom surface 122 of light guide plate 12.The optical film layer group 16 is set
It sets on the light-emitting surface 120 of light guide plate 12.The through-hole 18 through the optical film layer group 16 is offered on the backlight module 1.
The sensing light source 15 and the setting of sensing device 17 are below reflector plate 14 and at position corresponding with the through-hole 18.The sense
The light sensing that light source 15 issues is surveyed to project from the through-hole 18 to sensing object through after reflector plate 14 and light guide plate 12, and
Sensing device 17 is back to by through-hole 18 again after the sensing object reflection to be sensed.
In the present embodiment, the sensing device 17 includes camera lens 170 and imaging sensor 172.The camera lens 170 is right
The propagation characteristic of light sensing is adjusted with imaging of focusing in described image sensor 172.Described image sensor 172
The image of corresponding sensing object is formed, according to the light sensing that sensing object reflection is returned such as in order to therefrom extract sensing
The relevant characteristic of object.
It is understood that the application is upper, phase therewith with the backlight direction of the launch when describing the positional relationship of each component
Under anti-direction is.Such as: it is reference substance with light guide plate 12, the reflector plate 14 is arranged in light guide plate 12 and the backlight direction of the launch
Then think that the reflector plate 14 is located at the lower section of light guide plate 12 in opposite side.The optical film layer group 16 is arranged in light guide plate 12
Then think that the optical film layer group 16 is located at the top of light guide plate 12 along the side of the backlight direction of the launch.
The light sensing can have specific wavelength according to sensing principle and application scenarios.In the present embodiment,
The light sensing for example but be not limited to the use of sensing fingerprint or face 3-D image, can be infrared or near infrared light,
Wave-length coverage is 800 nanometers (Nanometer, nm) to 1650nm.
17 face through-hole 18 of the sensing device setting.The sensing light source 15 be arranged in around sensing device 17 and to
Through-hole 18 emits light sensing.The sensing light source 15 includes light-emitting component 150 and pedestal 152.The pedestal 152 includes direction
The supporting surface 1520 of through-hole 18.The light-emitting component 150 is arranged on the supporting surface 1520 to issue sensing light towards through-hole 18
Line.The light-emitting component 150 can be light emitting diode (Light Emitting Diode, LED) or laser diode
(Laser Diode,LD).In the present embodiment, the light-emitting component 150 can be vertical cavity surface emitting laser
(Vertical Cavity Surface Emitting Laser,VCSEL)。
The sensing light source 15 further includes optical scattering structure 154.The optical scattering structure 154 is arranged in light-emitting component 150
Light-emitting surface 120 on, the beam spread that direction for issuing light-emitting component 150 is concentrated be distributed at even intensity and have compared with
High dispersion angle is in the light sensing of diffusing reflection effect.The optical scattering structure 154 can be to be plated in 150 light-emitting surface of light-emitting component
On optical diffusion or the optical diffusion sheet that is arranged on 150 light-emitting surface of light-emitting component.The light-emitting component 150 can be set
It sets on the supporting surface 1520 of the pedestal 152.As shown in Fig. 2, the light-emitting component 150, which can also be arranged in, is opened in support
In accommodation groove 155 on face 1520, and the light-emitting surface of light-emitting component 150 and the supporting surface 1520 are maintained an equal level.
In the present embodiment, the sensing light source 15 is one, and the wherein side of sensing device 17 is arranged in, i.e., corresponding
The through-hole 18 is wherein configured on one side.The pedestal 152 is wedge block, including two right-angle surfaces to intersect vertically 1522
With the supporting surface 1520 of the described two right-angle surfaces 1522 of connection.The supporting surface is arranged towards through-hole 18, as pedestal 152
Supporting surface 1520 for the light-emitting component 150 to be arranged.Each sensing light source 15 may include one or more luminous members
Part 150.If each sensing light source 15 includes a light-emitting component 150, the pedestal 152 can be single wedge block.
If each sensing light source 15 includes multiple light-emitting components 150, the pedestal 152 or a wedge-shaped bar, shine member
Length direction of the part 150 according to default spacing along wedge-shaped bar is configured.
The top of the sensing device 17 and sensing light source 15 is arranged in the reflector plate 14, i.e. setting is filled in the sensing
Set the incident side of 17 light sensing and the light emission side of the sensing light source 15.The reflector plate 14 is located to go out with light guide plate 12
The backlight light for being used to show in light guide plate 12 is reflected back in light guide plate 12 and rises by opposite 12 other side of light guide plate in light side
To the effect for reducing backlight loss.The reflector plate 14 selects that the material of backlight light and the transmission light sensing can be reflected
It is made.Wherein, the backlight light is white light, and wave-length coverage is 380nm to 780nm.The wave-length coverage of the light sensing is
800nm to 1650nm.
The light guide plate 12 projects after being used to mix the backlight light that back light 10 is issued from light-emitting surface 120.Institute
State the wedge that the shape of light guide plate 12 can be gradually reduced for the thin plate or thickness of consistency of thickness from a laterally opposed other side
Shape thin plate.The wherein one side of the light guide plate 12 is defined as incidence surface 124.The corresponding light guide plate 12 of the back light 10 enters
Smooth surface 124 is arranged.The light that the back light 10 is issued is penetrated after the progress light guide plate 12 of incidence surface 124 and from light-emitting surface 120
Out.In the present embodiment, the light guide plate 12 is made of clear material, and can pass through the backlight light and light sensing.
In the present embodiment, the reflector plate 14 is the discrete parts independently of light guide plate 12.It is understood that
In other embodiments, the reflector plate 14, which can also be replaced by, is for example formed in 12 bottom surface 122 of light guide plate by coating process
On film layer structure.
The optical film layer group 16 includes but is not limited to diffusion sheet 160 and brightening piece 162.The setting of diffusion sheet 160 exists
On the light-emitting surface 120 of light guide plate 12, the backlight light for light guide plate 12 to be emitted is diffused to widen visual angle and hidden
The pattern being formed on light guide plate 12.The brightening piece 162 can be but be not limited to one or more prismatic lens.The brightening piece
162 are arranged in the light emission side of diffusion sheet 160, for polymerizeing backlight light within a certain angle to improve backlight illumination.
The through-hole 18 through itself is offered on the diffusion sheet 160 and brightening piece 162 respectively, described in penetrating
Light sensing.The pore diameter range of the through-hole 18 is 1 to 8 millimeter (Milimeter, mm).It is corresponding in the optical film layer group 16
The through-hole 18 opened up can have arbitrary shape, such as can be circle, rectangle, oblong or other irregular shapes
Shape etc., is not particularly limited herein.The through-hole 18 can be provided with any position of backlight module 1, such as can open up
In the center of backlight module 1 or edge etc., it is not particularly limited herein.In the present embodiment, the shape of the through-hole 18 is
It is round.
It is understood that in some embodiments, the backlight module 1 can also include processor 11 and memory
13.The processor 11 is connected with sensing device 17 to be handled with the characteristic sensed to sensing device 17.Institute
Memory 13 is stated to be connected with the sensing device 17 to store a collected characteristic.The processor 11 and memory
13 can be arranged on same circuit board together with sensing device 17 and sensing light source 15.
As shown in figure 3, the application second embodiment provides a kind of backlight module 2, structure and first embodiment
Backlight module 1 it is essentially identical, the main distinction is that the sensing light source 25 is two or more, and about the sensing
Device 27 is symmetrical.As shown in figure 4, the sensing light source 25 is separately positioned on sensing dress by taking four sensing light sources 25 as an example
It sets at 27 four symmetric positions up and down.Each sensing light source 25 may include one or more light-emitting components 250.
If the light-emitting component 250 is one, the pedestal 252 can be single wedge block.As shown in figure 5, if the light-emitting component
250 is multiple, and the pedestal 252 or a wedge-shaped bar, light-emitting component 250 is according to default spacing along the length of wedge-shaped bar
Direction is configured.
As shown in Figure 6 and Figure 7, the application third embodiment provides a kind of backlight module 3, and structure is implemented with first
The backlight module 1 of mode is essentially identical, and the main distinction is that the pedestal 352 of the sensing light source 35 is one around the sensing
The annular solid of device 37.The sensing device 37 is located at the center of the pedestal 352 and is surround by the pedestal 352.The hair
The setting of optical element 350 is on the pedestal 352 and symmetrical about sensing device 37.It is understood that the pedestal 352
It can be circular ring shape or square frame-shaped, not do specific limitation herein.
Ground is changed, in some embodiments, the optical film layer group 16 of the respective embodiments described above can also not have through-hole
18, or, one of the diffusion sheet 160 and brightening piece 162 include through-hole 18, or, the diffusion sheet 160 and increasing
What the through-hole 18 of at least one of mating plate 162 was not through etc. situation is also all possible.
Change ground, the sensing devices of the respective embodiments described above or/and sensing light source can also and non-corresponding or face through-hole
18 settings, can also be the peripheral region that through-hole 18 is arranged in, by cooperating the reflex of optical module that can also realize light
Launch or receives.
It should be noted that described image sensor 172 is not limited to execute biology described in the respective embodiments described above
Feature detection and identification.Ground is changed, in some embodiments, the reception of described image sensor 172 is reflected by external object
Sensing light beam back, and realized according to the sensing light beam received and the two dimension or 3-D image of the external object are drawn,
Or/and identification of the realization to the external object, or/and realize the distance sensing to the external object, or/and realize
The external object is taken pictures or recorded a video etc..
As shown in figure 8, the 4th embodiment of the application provides a kind of display device 4, the display device 4 includes liquid crystal
Show panel 40 and such as above-mentioned first to backlight module 1 provided by third embodiment.
The liquid crystal display panel 40 includes but is not limited to first substrate (not shown), the film being arranged on first substrate crystalline substance
Body pipe array circuit (not shown), the second substrate (not shown), the liquid crystal layer (figure being arranged between first substrate and the second substrate
Do not show), upper polaroid (not shown), down polaroid (not shown), colored filter (not shown) and cover sheet (not shown)
Deng.The backlight module 1 provides backlight.The light emission side of the backlight module 1 is arranged in basis in the liquid crystal display panel 40
Content to display modulates penetrated backlight to realize display.
The light sensing that the sensing light source 15 is issued penetrates liquid crystal display panel after being pierced by backlight module 1 from through-hole 18
40 expose on sensing object.The light sensing penetrates liquid crystal display panel 40 through sensing object reflection back, passes through through-hole
18, then received through light guide plate 12 and reflector plate 14 by the sensing device 17 to be sensed accordingly.
In the present embodiment, the sensing object is the finger of user, is pressed in the liquid crystal display panel 40
On corresponding position.The biological characteristic sensed is the fingerprint of user.It is understood that in other embodiments, it is described
Palm, face and the eyes etc. that object can also be user are sensed, corresponding biological characteristic can be palmmprint, the face of user
Portion's three-dimensional information and iris etc. do not do specific limitation herein.
As shown in figure 9, the 5th embodiment of the application provides a kind of electronic equipment 5, for example, mobile phone, laptop,
Tablet computer, touch-control interaction screen etc..The electronic equipment 5 includes display dress provided by least one above-mentioned 4th embodiment
Set 4.The characteristic for the sensing object that the electronic equipment 5 is for example sensed according to the display device 4 is to identify sensing
The identity of object and the relevant function of corresponding execution, such as: payment, login account etc..In the present embodiment, the display dress
Set 4 sensings is to sense the finger print data of object, and the identity of sensing object is identified according to the finger print data sensed.
Compared with prior art, backlight module 1 provided herein, display device 4 and electronic equipment 5 are by backlight
Mould group 1 offers the corresponding position setting sensing mould group of through-hole 18 to realize corresponding sensing function, so as to not influence
The functional module group that panel front was originally arranged in is hidden in below screen by screen under the premise of completely showing, further increases screen
Accounting realizes really screen display comprehensively.
Change ground, in some embodiments, the electronic equipment 5 may also comprise or above embodiment in it is any one
Backlight module described in.
In the description of this specification, reference term " embodiment ", " certain embodiments ", " schematically implementation
What the description of mode ", " example ", " specific example " or " some examples " etc. meant to describe in conjunction with the embodiment or example
Particular features, structures, materials, or characteristics are contained at least one embodiment or example of the application.In this specification
In, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific spy of description
Sign, structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
The foregoing is merely the better embodiments of the application, all the application's not to limit the application
Made any modifications, equivalent replacements, and improvements etc., should be included within the scope of protection of this application within spirit and principle.
Claims (10)
1. a kind of backlight module comprising light guide plate, reflector plate, optical film layer group, sensing device and sensing light source, the leaded light
Plate includes light-emitting surface and the bottom surface opposite with light-emitting surface, and the bottom surface side of light guide plate, the optical film is arranged in the reflector plate
Layer group is arranged on the light-emitting surface of light guide plate, offers in the optical film layer group through through-hole, the sensing device and sensing
Light source is arranged below reflector plate, the light sensing that the sensing light source issues through after reflector plate and light guide plate from the through-hole
It projects to a sensing object, and sensing device is back to by through-hole again after the sensing object reflection, wherein the sensing
Light source includes light-emitting component and optical scattering structure, and the optical scattering structure is arranged on the light-emitting surface of light-emitting component, for institute
The light for stating light-emitting component sending is diffused.
2. backlight module as described in claim 1, it is characterised in that: it is described sensing light source issue light sensing be it is infrared or
Near infrared light, wave-length coverage are 800 nanometers to 1650 nanometers.
3. backlight module as described in claim 1, it is characterised in that: the sensing light source further includes pedestal, the pedestal packet
The supporting surface towards through-hole is included, the light-emitting component is arranged on the supporting surface to issue light sensing towards through-hole.
4. backlight module as described in claim 1, it is characterised in that: what the optical scattering structure was used to issue light-emitting component
The beam spread that direction is concentrated is at even intensity distribution in the light sensing of diffusing reflection effect.
5. backlight module as claimed in claim 4, it is characterised in that: the optics diffusion structure is to be plated in light-emitting component to shine
Optical diffusion on face or the optical diffusion sheet being arranged on light-emitting component light-emitting surface.
6. backlight module as claimed in claim 3, it is characterised in that: the pedestal is the ring for surrounding the sensing device
Body, the sensing device are located at the center of the pedestal and by the base ring around the light-emitting component is arranged in the base
It is on seat and symmetrical about sensing device.
7. backlight module as claimed in claim 3, it is characterised in that: the pedestal is wedge shape, is intersected vertically including two
The supporting surface of right-angle surface and the described two right-angle surfaces of connection.
8. backlight module as described in claim 1, it is characterised in that: the sensing light source is two or more, described
It is symmetrical about the sensing device to sense light source.
9. a kind of display device with biological characteristic identification function comprising as claimed in any of claims 1 to 8 in one of claims
Backlight module and the liquid crystal display panel that the backlight module light emission side is set, the light sensing that the sensing light source is issued
The sensing that liquid crystal display panel carries out biological characteristic is penetrated after being pierced by backlight module from through-hole.
10. a kind of electronic equipment comprising backlight module as claimed in any of claims 1 to 8 in one of claims or at least one such as
Display device as claimed in claim 9 with biological characteristic identification function.
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CN201910041459.9A CN109709712A (en) | 2019-01-16 | 2019-01-16 | A kind of backlight module, display device and electronic equipment |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110414503A (en) * | 2019-08-05 | 2019-11-05 | 深圳市隆利科技股份有限公司 | Backlight module and electronic equipment for fingerprint recognition in LCD screen |
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