CN109725380A - Light guide plate and preparation method thereof, encapsulated jig, optical sensor and electronic equipment - Google Patents
Light guide plate and preparation method thereof, encapsulated jig, optical sensor and electronic equipment Download PDFInfo
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- CN109725380A CN109725380A CN201910014177.XA CN201910014177A CN109725380A CN 109725380 A CN109725380 A CN 109725380A CN 201910014177 A CN201910014177 A CN 201910014177A CN 109725380 A CN109725380 A CN 109725380A
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Abstract
The present invention provides a kind of light guide plate and preparation method thereof, encapsulated jig, optical sensor and electronic equipments, it is related to optical sensor field, the light guide plate, it include: light guide plate main body, the transmission plane being oppositely arranged including the plane of incidence and the plane of incidence and the scattering surface between the plane of incidence and transmission plane, and it is covered in the reflective layer on scattering surface surface；Wherein, the refractive index of reflective layer is lower than the refractive index of light guide plate main body.It is able to solve the low problem of the low caused identifying system sensitivity of light guide plate light transmittance in current face identification system using the light guide plate, has reached the technical effect for improving face identification system sensitivity.
Description
Technical field
The present invention relates to optical sensor fields, pass more particularly, to a kind of light guide plate and preparation method thereof, encapsulated jig, light
Sensor and electronic equipment.
Background technique
With a large amount of popularization and applications of mobile terminal (mobile phone, tablet computer etc.), the application that mobile terminal can be supported is got over
Come more, function is stronger and stronger, and mobile terminal develops towards diversification, personalized direction, and becoming can not in user's life
The appliance and electronic lacked.With the development of technology, the application of face recognition technology is also more more and more universal, and application scenarios include face
The recognition of face of identification lock, human face identification work-attendance checking system, cell phone application logs in.The maximum feature of recognition of face be it is more safe,
Secrecy and convenience.And the unique active discriminating power of recognition of face ensure that other people can not be with inactive photo, wood
Even, waxen imagen or even the number of people cheat identifying system, cannot counterfeit.
In face identification system, there is an important component environment optical sensor, it has important shadow to image quality
It rings.And in ambient light sensor, the size for playing the transmissivity of the light guide plate of optical transport directly affects ambient light sensing
The sensitivity of device.Due to the sensitivity of identifying system to be guaranteed, thus, it is ensured that light guide plate have along light transmission direction it is biggish
Light transmittance, preventing light from biggish scattering, refraction etc. occurring inside light guide plate reduces the light transmittance of light.
Current light guide plate is that light guiding points are arranged on light guide plate main body, makes light guide plate using the density of light guiding points, size
Uniformly light-emitting.The light guide plate light scattered power of the structure is high, and the light transmittance along light transmission direction is low, is unsuitable in ring
In the optical sensor of border.
Summary of the invention
The first object of the present invention is to provide a kind of light guide plate, with the height developed in a kind of suitable face identification system
Light guide plate in sensitivity ambient light sensor.
The second object of the present invention is to provide a kind of encapsulated jig for being used to prepare above-mentioned light guide plate, encapsulated is controlled using this
Tool can be improved the production efficiency and yield rate of light guide plate.
The third object of the present invention is to provide a kind of preparation method of light guide plate, can be realized four using the preparation method
The preparation of the light guide plate of bread glue.
The fourth object of the present invention is to provide a kind of optical sensor, which is able to solve current ambient light sensing
The low problem of device sensitivity.
The fifth object of the present invention is to provide a kind of electronic equipment, which includes above-mentioned optical sensor, can
Improve the sensitivity of face identification functions.
In order to realize above-mentioned purpose of the invention, the following technical scheme is adopted:
A kind of light guide plate, comprising:
Light guide plate main body, the transmission plane being oppositely arranged including the plane of incidence, with the plane of incidence and between the plane of incidence and
Scattering surface between the transmission plane, and
Reflective layer is covered in the scattering surface surface；
Wherein, the refractive index of the reflective layer is lower than the refractive index of the light guide plate main body, the folding of the preferably described reflective layer
Penetrate rate lower than the refractive index of light guide plate main body 0.2 or more.
A kind of encapsulated jig being used to prepare light guide plate, comprising:
Two transparent substrates, including the first transparent substrate and the second transparent substrate, and
Supporting element is set between two transparent substrates, is used to support light guide plate main body and is kept light guide plate main body transparent with two
Substrate separation；
Wherein, two transparent substrates are equipped with anti-sticking film plating layer towards the supporting element on one side.
A kind of preparation method of light guide plate, comprising the following steps:
S1) above-mentioned encapsulated jig is provided, N number of light guide plate main body is placed on the first transparent substrate by supporting element,
In, N be >=1 natural number；
S2 reflective layer glue) is coated, reflective layer glue is made to submerge the light guide plate main body；
S3) lid closes the second transparent substrate, contacts second transparent substrate with the reflective layer glue；
S4) solidify reflective layer glue, form reflective layer on the light guide plate main body surface；
S5 the encapsulated jig) is removed, the light guide plate is obtained.
A kind of preparation method of light guide plate, comprising the following steps:
S1) encapsulated jig of the invention is provided, N number of light guide plate main body is placed in the first transparent substrate by supporting element
On, wherein the natural number that N is >=1；Then lid closes the second transparent substrate, and is sealed to form receiving light guide plate with sealing strip
The accommodation space of main body；
S2 reflective layer glue) is injected into the accommodation space from the gum-injecting port, makes to lead described in the submergence of reflective layer glue
Tabula rasa main body；
S3) solidify reflective layer glue, form reflective layer on the light guide plate main body surface；
S4 the encapsulated jig) is removed, the light guide plate is obtained.
A kind of optical sensor, including above-mentioned light guide plate.
A kind of electronic equipment, including above-mentioned optical sensor.
Compared with the prior art, the invention has the following beneficial effects:
Light guide plate provided by the invention, including light guide plate main body and reflective layer, wherein light guide plate main body include the plane of incidence,
The transmission plane being oppositely arranged with the plane of incidence and the scattering surface between the plane of incidence and transmission plane, reflective layer are covered in scattering surface table
Face.The Preset Transfer direction of light is entered from the plane of incidence, is projected from transmission plane, when light enters light guide plate main body from the plane of incidence
Behind inside, the effects of due to light guide plate main body to the scattering of light, refraction, light can scattering between the plane of incidence and transmission plane
It projects in face.In the present invention, due to being provided with reflective layer in scattering surface, and the refractive index of reflective layer is lower than the folding of light guide plate main body
Rate is penetrated, under the action of reflective layer, total reflection principle can be met when light enters reflective layer from light guide plate main body at a certain angle,
Light enters optically thinner medium from optically denser medium can be reflected back toward optically denser medium again, especially when the refractive index of reflective layer compares light guide plate main body
Refractive index it is low 0.2 or more when, reflecting effect is more preferable, to reduce the decaying of light, and then the light projected from scattering surface weighs again
It is newly reflected onto light guide plate main body and is transmitted.Therefore, light guide plate provided by the invention can subtract to the greatest extent in structure
The loss of few light, makes the light-transmitting plate have higher light transmittance.The light guide plate is applied in ambient light sensor, can be significantly improved
The sensitivity of ambient light sensor, and then improve the sensitivity of face recognition system.
When preparing above-mentioned light guide plate using the encapsulated jig, it is transparent that light guide plate main body is first placed on first by supporting element
On substrate, it is then coated with reflective layer glue, so that reflective layer glue is impregnated light guide plate main body rear cover the second transparent substrate of conjunction and is consolidated
Change, demoulding obtains light guide plate after the completion of solidification；Alternatively, light guide plate main body is placed on the first transparent substrate by supporting element
Afterwards, first the first transparent substrate and the second transparent substrate lid are closed, then again between the first transparent substrate and the second transparent substrate
Reflective layer glue is poured, demoulding obtains light guide plate after cured.In order to realize demoulding, in two transparent substrates towards the one of supporting element
Face is equipped with anti-sticking film plating layer, in this way when removing the first transparent substrate and the second transparent substrate, reflective layer can be prevented to be bonded
On two transparent substrates.
It can be realized the integral coating of the scattering surface of light guide plate main body using preparation method provided by the invention, it is efficiently fast
Victory belongs to seamless connection between the reflective layer coated on each astigmatism face of light guide plate, and covering property is good, no leakage problem, can be from whole
Light guide plate is improved on body along the light transmittance of light transmission direction.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram for the light guide plate that embodiment 1 provides；
Fig. 2 is the structural schematic diagram of light guide plate main body in embodiment 1；
Fig. 3 is the structural schematic diagram for the encapsulated jig that the embodiment of the present invention 2 provides；
Fig. 4 is the combining structure schematic diagram of the transparent cover plate and supporting element in the embodiment of the present invention 2；
Fig. 5 is the structural schematic diagram of the pedestal in the embodiment of the present invention 2；
Fig. 6 is the structural schematic diagram in the embodiment of the present invention 3 in sheet glass gap after dispensing；
Fig. 7 is the structural schematic diagram that 3 middle cover of the embodiment of the present invention closes the second transparent glass substrate；
Fig. 8 is the structural schematic diagram that the glass bar combination obtained after encapsulated jig is removed in the embodiment of the present invention 3；
Fig. 9 is the structural schematic diagram for the encapsulated jig that the embodiment of the present invention 4 provides；
Figure 10 is the structural schematic diagram for the light guide plate that the embodiment of the present invention 10 provides.
Icon: 10- light guide plate main body；The 101- plane of incidence；102- transmission plane；103- scattering surface；20- reflective layer；
21- shading protective layer；The encapsulated jig of 30-；The first transparent glass substrate of 301-；The second transparent glass substrate of 302-；
The side 3021-；303-UV solves viscous double faced adhesive tape；304- reflective layer glue；305- sealing element；40- pedestal；401- Back Word
Shape framework；402- locating piece.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indication or suggestion relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, 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 be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the present invention.
On the one hand, the present invention provides a kind of light guide plates, comprising:
Light guide plate main body, the transmission plane being oppositely arranged including the plane of incidence, with the plane of incidence and between the plane of incidence and
Scattering surface between the transmission plane, and
Reflective layer is covered in the scattering surface surface；
Wherein, the refractive index of the reflective layer is lower than the refractive index of the light guide plate main body.
Light guide plate provided by the invention, including light guide plate main body and reflective layer, wherein light guide plate main body include the plane of incidence,
The transmission plane being oppositely arranged with the plane of incidence and the scattering surface between the plane of incidence and transmission plane, reflective layer are covered in scattering surface table
Face.The Preset Transfer direction of light is entered from the plane of incidence, is projected from transmission plane, when light enters light guide plate main body from the plane of incidence
Behind inside, the effects of due to light guide plate main body to the scattering of light, refraction, light can scattering between the plane of incidence and transmission plane
It projects in face.In the present invention, due to being provided with reflective layer in scattering surface, and the refractive index of reflective layer is lower than the folding of light guide plate main body
Rate is penetrated, under the action of reflective layer, total reflection principle can be met when light enters reflective layer from light guide plate main body at a certain angle,
Light enters optically thinner medium from optically denser medium can be reflected back toward optically denser medium again, especially when the refractive index of reflective layer compares light guide plate main body
Refractive index it is low 0.2 or more when, reflecting effect is more preferable, to reduce the decaying of light, and then the light projected from scattering surface weighs again
It is newly reflected onto light guide plate main body and is transmitted.Therefore, light guide plate provided by the invention can subtract to the greatest extent in structure
The loss of few light, makes the light-transmitting plate have higher light transmittance.The light guide plate is applied in ambient light sensor, can be significantly improved
The sensitivity of ambient light sensor, and then improve the sensitivity of face recognition system.
In certain embodiments of the present invention, light guide plate main body be preferably rule rectangular parallelepiped structure, be divided into length and width,
High three directions, to facilitate processing and manufacturing.If the length direction of light guide plate cylinder is defined as light transmission direction, lead
One wide high surface of tabula rasa main body is the plane of incidence, another wide high surface is then transmission plane, and the face of growing tall of light guide plate main body is then
Scattering surface.The light guide plate of the light guide plate main body composition of the structure, wherein the plane of incidence and transmission plane are oppositely arranged, reflective layer covering
In scattering surface surface.
In certain embodiments of the present invention, in order to improve the reflecting effect of reflective layer, more light is enable to weigh
Newly enter inside light guide plate main body, the refractive index of the reflective layer of reflective layer lower than the refractive index of light guide plate main body 0.2 or more, such as
It can be with low 0.2,0.22,0.25,0.27,0.3,0.32,0.35,0.37 or 0.4.
In certain embodiments of the present invention, light guide plate main body is glass or light transmission macromolecule, transparent polymer material
It such as can be polymetylmethacrylate.When selecting light guide plate main body material, as to select light transmittance high as possible
Material, for example, the glass or high molecular material of selection can make light transmittance >=90% of light guide plate main body, to improve light guide plate master
The translucency of body the application.
In certain embodiments of the present invention, it is UV glue that reflective layer is raw materials used.It is prepared using UV glue reflective
Layer is UV polymer.When selecting UV glue, specific UV glue is selected according to the refractive index for the light guide plate actually selected, makes final obtain
The refractive index of the UV polymer arrived is less than the refractive index of light guide plate.Such as it can choose the UV that refractive index is 1.38-1.42
Glue, simultaneous selection refractive index are that 1.6 or more glass are matched therewith.
The thickness of reflective layer can be set according to the size of the size of reflector main body, when for tablet computer or hand
When in the equipment such as machine, the thickness of reflective layer for example can be 0.1-0.2mm.
In certain embodiments of the present invention, surface roughness≤50nm of reflective layer.By the table for limiting reflective layer
Surface roughness can whether there is bubble during the preparation process clearly to observe during the examination and test of products, in time in reflective layer
It finds the problem, rejects rejected product.
In certain embodiments of the present invention, light guide plate further includes the shading protective layer for being formed in reflective layer surface.
Shading protective layer is set in reflective layer surface, can protect reflective layer during installation and be not scratched.Of the invention
In other preferred embodiments, shading protective layer is black shading protective layer, selects black shading protective layer in addition to that can protect
Shield reflective layer can also prevent the light in environment from entering in light guide plate from scattering surface side, to imaging outside not being scratched
System generates interference.The material of shading protective layer selects other than considering light-proofness, also to have certain hardness, be equivalent to
The outside of light guide plate is provided with crust, can be connected during installation by shading protective layer with other elements, to avoid peace
Dress process damages light guide plate main body or reflective layer, facilitates the installation of light guide plate.For example, during installation can be in shading
On protective layer punching installed, or on shading protective layer coated with adhesive to be connected with other components.
In certain embodiments of the present invention, the surface roughness of shading protective layer is 100-300nm.Pass through restriction
The surface roughness of shading protective layer, can prevent from be easy to causeing because its surface roughness is too low be scratched or surface adhesion is different
Object and its surface roughness are too high, caused by bad order.
Second aspect, the present invention provides a kind of encapsulated jig for being used to prepare above-mentioned light guide plate, the encapsulated jig packets
It includes:
Two transparent substrates, including the first transparent substrate and the second transparent substrate, and
Supporting element is set between two transparent substrates, is used to support light guide plate main body and is kept light guide plate main body transparent with two
Substrate separation；
Wherein, two transparent substrates are equipped with anti-sticking film plating layer towards supporting element on one side.
When preparing above-mentioned light guide plate using the encapsulated jig, it is transparent that light guide plate main body is first placed on first by supporting element
On substrate, it is then coated with reflective layer glue, so that reflective layer glue is impregnated light guide plate main body rear cover the second transparent substrate of conjunction and is consolidated
Change, demoulding obtains light guide plate after the completion of solidification；Alternatively, light guide plate main body is placed on the first transparent substrate by supporting element
Afterwards, first the first transparent substrate and the second transparent substrate lid are closed, then again between the first transparent substrate and the second transparent substrate
Reflective layer glue is poured, demoulding obtains light guide plate after cured.In order to realize demoulding, in two transparent substrates towards the one of supporting element
Face is equipped with anti-sticking film plating layer, in this way when removing the first transparent substrate and the second transparent substrate, reflective layer can be prevented to be bonded
On two transparent substrates.
In the present invention, supporting element both plays the role of supporting light guide plate main body position, keeps light guide plate main body transparent with first
Substrate and the separation of the second transparent substrate, while playing the role of lightguide plate fixing main body again.Supporting element can for it is first transparent
The component that substrate or the second transparent substrate are structure as a whole is arranged on boss and places for example, the boss being integrated with transparent substrate
The groove of light guide plate main body；Supporting element may be individual member.When supporting element is and the first transparent substrate or the second transparent base
When the component that plate is structure as a whole, surface also is provided with anti-sticking film plating layer.
Anti-sticking film plating layer in the present invention, raw material composition and the anti-fingerprint film layer phase in mobile phone glass panel of film layer
Together, it is fluorine-containing compound, there is good hydrophobicity, oleophobic property and antistick characteristic.The thickness of anti-sticking film plating layer for example can be
AS water proof anti-soil film.
In the present invention, the first transparent substrate and the second transparent substrate are plate-like structure, and surface is flat surface, with
Guarantee to obtain surfacing and smooth reflective layer.Here not to the material of the first transparent substrate and the second transparent substrate
Make specific restriction, as long as there is certain hardness and translucency, for example, material can be glass or high molecular polymer material
Material.
In certain embodiments of the present invention, the rough surface of first transparent substrate and second transparent substrate
Degree is 5-20nm.By limiting the surface roughness of the first transparent substrate and the second transparent substrate, effective control can be improved
The surface smoothness of obtained reflective layer and the surface roughness of reflective layer, at the same time it can also more clearly observe reflective layer shape
At in the process the case where.
In some preferred embodiments of the invention, supporting element is that UV solves viscous double faced adhesive tape or heating solves viscous double-sided adhesive
Band, preferably UV solve viscous double faced adhesive tape.
UV solves viscous double faced adhesive tape: when irradiating without UV, the adhesive layer in the adhesive tape is viscosity；After UV irradiates,
Adhesive layer in the adhesive tape loses bonding.
Heating solves viscous double faced adhesive tape: when not heated, such as at 10-40 DEG C of room temperature, the adhesive layer in the adhesive tape is
Viscosity；When by being heated to certain temperature, such as after being heated to 60-80 DEG C, the adhesive layer in the adhesive tape loses bonding.
UV is selected to solve viscous double faced adhesive tape or the viscous double faced adhesive tape of heating solution, it is conveniently stripped.UV is selected to solve viscous double faced adhesive tape or add
When being pyrolyzed viscous both adhesive tapes of double faced adhesive tape as supporting element, first one group of adhesive tape is individually fixed on the first transparent substrate, so
Light guide plate main body is fixed on to this group of tape surface again afterwards, the position that pastes of adhesive tape is leaned at two close end in light guide plate main body；Later
Another group of adhesive tape is fixed on to the another side of light guide plate main body again, for bonding the second transparent substrate.
It is reflective after coating when UV being selected to solve viscous double faced adhesive tape or viscous both adhesive tapes of double faced adhesive tape of heating solution as supporting element
The thickness of layer is determined by the thickness of adhesive tape.
In some preferred embodiments of the invention, supporting element is that UV solves viscous double faced adhesive tape.UV is selected to solve viscous double-sided adhesive
Band can be matched with UV glue.When coating or injection UV glue, UV solves viscous double faced adhesive tape band toughness, and UV glue is in stream at this time
Dynamic state, viscosity are lower.After UV irradiates, UV adhesive curing is bonded together with light guide plate main body, and UV solve viscous double faced adhesive tape this
When lost viscosity.When demoulding, as long as gently tearing-off adhesive tape.Therefore, when selecting UV glue to prepare reflective layer, UV is selected
Solving viscous double faced adhesive tape can cooperate with it, avoid the secondary operation technique generated by demoulding, convenient and efficient, and production effect is high.
The encapsulated jig of one embodiment of the present invention, comprising:
Two transparent substrates, the first transparent substrate and the second transparent substrate, and
UV solves viscous double faced adhesive tape, is adhered to the first transparent substrate and second suitable for there is one group of UV to solve viscous double faced adhesive tape respectively
On transparent substrate, it is used to support light guide plate main body and separates light guide plate main body with two transparent substrates；
Wherein, two transparent substrates are equipped with anti-sticking film plating layer towards supporting element on one side.
In some preferred embodiments of the invention, the encapsulated jig includes for fixing the first transparent substrate position
Pedestal, the pedestal includes rectangular-ambulatory-plane framework, and the locating piece on rectangular-ambulatory-plane framework surface is arranged in.Rectangular-ambulatory-plane framework
Centre is engraved structure, is irradiated convenient for UV light, and locating piece, which is arranged, can limit the position of two transparent substrates, prevent transparent substrate
It slides in operation, has positioning and guiding role to transparent substrate.For example, locating piece can be with when setting locating piece
The L-shaped four corners for being distributed in rectangular-ambulatory-plane framework surface.
In certain embodiments of the present invention, including sealing element, the sealing element and two transparent substrates at least form one
Accommodation space, the supporting element are located in the accommodation space, and side is equipped with gum-injecting port.
The encapsulated jig of the embodiment, including two transparent substrates and supporting element and sealing element, wherein supporting element is put
It is placed between two transparent substrates, and is used to support light guide plate main body, separate light guide plate main body with two transparent substrates, and it is close
Sealing is used to seal the gap between two transparent substrates, and supporting element is made to be placed in the accommodation space that two transparent substrates and sealing element are formed
It is interior, wherein sealing element is equipped with gum-injecting port, and when carrying out encapsulated using the encapsulated jig, light guide plate main body is fixed on support
On part, and glue is injected to accommodation space by gum-injecting port, to complete the encapsulated of light guide plate main body.It can using the encapsulated jig
Encapsulated to the four sides of light guide plate to realize and encapsulated uniform, production capacity is high；Simultaneously as two transparent substrates are towards the supporting element
Be equipped with anti-sticking film plating layer on one side, therefore, which is easier to demould after the completion of encapsulated, and while demoulding will not make to lead
Tabula rasa fracture.
In the present invention, the installation site of sealing element, which can according to need, to be set.Sealing element can be fixed on first thoroughly
Between bright substrate and the second transparent substrate, such as both it is set to along the edge of the first transparent substrate and the second transparent substrate
Between, it is perhaps set to the middle inner region of the first transparent substrate and the second transparent substrate or sealing element pair can also be used
It is sealed to realize sealing the edge of first transparent substrate and the second transparent substrate.It, can when being sealed with sealing element
To stay on one side without sealing, and the injection of glue is carried out as gum-injecting port.
In certain embodiments of the present invention, the sealing element is sealing joint strip, which can be for bullet
The rubber based elastic sealing joint strip of property, or acrylic adhesive tape or foam tape.
For the ease of fixation, in a further embodiment of the invention, sealing joint strip is preferably acrylic adhesive tape or bubble
Celloidin band.
The third aspect, the present invention provides a kind of preparation methods of above-mentioned light guide plate, comprising the following steps:
S1) above-mentioned encapsulated jig is provided, N number of light guide plate main body is placed on the first transparent substrate by supporting element,
In, N be >=1 natural number；
S2 reflective layer glue) is coated, reflective layer glue is made to submerge the light guide plate main body；
S3) lid closes the second transparent substrate, contacts second transparent substrate with the reflective layer glue；
S4) solidify reflective layer glue, form reflective layer on the light guide plate main body surface；
S5 the encapsulated jig) is removed, the light guide plate is obtained.
It can be realized the integral coating of the scattering surface of light guide plate main body using preparation method provided by the invention, it is efficiently fast
Victory belongs to seamless connection between the reflective layer coated on each astigmatism face of light guide plate, and covering property is good, no leakage problem, can be from whole
Light guide plate is improved on body along the light transmittance of light transmission direction.
Wherein, step S1) in, when supporting element is double faced adhesive tape, light guide plate main body can use double faced adhesive tape and be pasted onto
On first transparent substrate；When supporting element is the boss being integrated with the first transparent substrate, directly light guide plate main body can be put
It sets in the corresponding recesses of boss.
In addition, step S2) in, making reflective layer glue submergence light guide plate main body is to instigate reflective layer glue all submergence leaded lights
Plate main body, the four sides to realize light guide plate main body are encapsulated.
In certain embodiments of the present invention, when the second transparent substrate of Gai He, a side with the second transparent substrate is
Axis gradually transfers the second transparent substrate in a manner of tilt rotation.When covering conjunction, the second transparent substrate, should using a side as shaft
After side is contacted with the first transparent substrate, the second transparent substrate is gradually transferred with rotating manner, the second transparent substrate is from above-mentioned side
It is gradually increased with the contact area of reflective layer glue while beginning to pass through rotation decentralization until all lid closes.The lid closes mode and can go
Except the bubble between the second transparent substrate and reflective layer glue, there is gas so as to be effectively reduced in the reflective layer being prepared
The probability of bubble.
Another preparation method of light guide plate of the present invention, comprising the following steps:
S1) the present invention encapsulated jig for being equipped with sealing element is provided, N number of light guide plate main body is placed in first by supporting element
On transparent substrate, wherein the natural number that N is >=1；Then lid closes the second transparent substrate, and is sealed to form appearance with sealing strip
Receive the accommodation space of light guide plate main body；
S2 reflective layer glue) is injected into the accommodation space from the gum-injecting port, makes to lead described in the submergence of reflective layer glue
Tabula rasa main body；
S3) solidify reflective layer glue, form reflective layer on the light guide plate main body surface；
S4 the encapsulated jig) is removed, the light guide plate is obtained.
Preparation method provided by the invention is to be passed through light guide plate main body using encapsulated jig of the invention is provided first
Supporting element prevents on the first transparent substrate, and then lid closes the second transparent substrate, and to the first transparent substrate and the second transparent base
Plate is sealed, and carries out injecting glue by the gum-injecting port on sealing element after sealing, makes the reflective layer glue submergence light guide plate master of injection
Body；So that reflective layer glue is formed reflective layer on light guide plate main body surface by solidification later, and then obtains light guide plate.
The preparation method is simple, it is easy to operate, laborsaving it is time saving, reliability is higher, cost is relatively low, does not need complicated board
Equipment, therefore practicability is preferable, application easy to spread, has larger practical value.
Wherein, in step S1), when supporting element is double faced adhesive tape, light guide plate main body can use double faced adhesive tape stickup
On the first transparent substrate；It, can be directly by light guide plate when supporting element is the boss being structure as a whole with the first transparent substrate
Main body is placed in the corresponding recesses of boss.When sealing, can first by the first transparent substrate and the second transparent substrate Gai Hehou again
It is sealed, first sealing element can also be placed on the first transparent substrate with sealing element, then covered again and close the second transparent substrate.
Under which, the matrix of sealing element is elastic sealing element, can realize the first transparent substrate and second transparent by compressive seal
Sealing between substrate.
When injecting reflective layer glue, encapsulated jig can be made in a vertical state, i.e. gum-injecting port is upper, when injecting glue, instead
Photosphere glue flows under upper, which is more advantageous to the discharge of bubble.
Fourth aspect, the present invention provides a kind of optical sensors, including above-mentioned light guide plate.
Due to above-mentioned light guide plate light transmittance with higher, light loss is small, therefore, the light sensing obtained using the light guide plate
The high advantage of utensil thoughts Photosensitivity.
5th aspect, the present invention provides a kind of electronic equipment, including above-mentioned optical sensor.
The electronic equipment includes above-mentioned optical sensor, and the face identification system obtained using the optical sensor is with higher
Induction sensitivity.
Embodiment 1
As shown in Figure 1, the present embodiment is a kind of light guide plate, comprising:
Light guide plate main body 10, as shown in Fig. 2, include the plane of incidence 101, the transmission plane 102 being oppositely arranged with the plane of incidence 101,
And the scattering surface 103 between the plane of incidence 101 and transmission plane 102, and
Reflective layer 20 is covered in 103 surface of scattering surface；
Wherein, light guide plate main body 10 is glass, refractive index 1.8；Reflective layer 20 it is raw materials used be UV glue, formation it is anti-
Photosphere is UV polymer, refractive index 1.4.
In the light guide plate, light guide plate main body 10 is the rectangular parallelepiped structure of rule, is divided into three directions of length, with convenient
Processing and manufacturing.The length direction of the light guide plate main body 10 be light transmission direction, a wide high surface of light guide plate main body 10 be into
Face 101 is penetrated, another wide high surface is then transmission plane 102, and the face of growing tall of light guide plate main body is then scattering surface 103, the plane of incidence 101
It is oppositely arranged with transmission plane 102, reflective layer 20 is covered in 103 surface of scattering surface.
Embodiment 2
The present embodiment is a kind of encapsulated jig 30 of light guide plate, and structure is as in Figure 3-5, which includes:
Two transparent substrates, the first transparent glass substrate 301 and the second transparent glass substrate 302, and
UV solves viscous double faced adhesive tape 303, and when use has one group of UV to solve viscous double faced adhesive tape to be adhered to the first transparent glass base respectively
On plate and the second transparent glass substrate, it is used to support light guide plate main body and separates light guide plate main body with two transparent substrates；
Pedestal 40: for fixing the position of the first transparent glass substrate 301, including rectangular-ambulatory-plane framework 401, and setting exists
The locating piece 402 on 401 surface of rectangular-ambulatory-plane framework is engraved structure among rectangular-ambulatory-plane framework 401, and locating piece 402 is L-shaped to be distributed in
The four corners on 401 surface of rectangular-ambulatory-plane framework；
Wherein, and two transparent substrates towards supporting element are equipped with anti-sticking film plating layer on one side.
Embodiment 3
The present embodiment is a kind of preparation method of light guide plate, comprising the following steps:
S1 the encapsulated jig 30 in embodiment 2) is provided, including two pieces of glass substrates and UV solve viscous double faced adhesive tape 303；Adhesive tape
Thickness it is corresponding with encapsulated thickness is needed；
It is good according to certain gap arrangement by multiple light guide plate main bodies 10, i.e. strip sheet glass, and by sheet glass according to
Structure shown in Fig. 6 posts UV and solves viscous double faced adhesive tape 303, and sheet glass and UV are then solved viscous double faced adhesive tape 303 and paste the together
On one transparent glass substrate 301；
S2) by reflective layer glue 304, i.e. UV glue, the gap between sheet glass is clicked and entered, and reflective layer glue lid is made to cross glass
Glass piece, as shown in Figure 6；
S3 it is) shaft with a side 3021 by the second transparent glass substrate 302, second is gradually transferred in a manner of tilt rotation
Transparent glass substrate 302, as shown in fig. 7, the second transparent glass substrate 302 arrow direction along figure since the above-mentioned side 3021
Rotation is gradually increased the contact area with reflective layer glue 304 by rotation decentralization, until all lid closes；It slowly covers on earth not
It can quickly cover in order to avoid generating bubble；
S4) make UV adhesive curing using the irradiation of UV equipment upper and lower surface, form reflective layer in glass sheet surface, while releasing UV
Solve the viscosity of adhesive tape；
S5 two pieces of glass substrates) are opened, UV is torn and solves viscous double faced adhesive tape 303, the encapsulated a plurality of glass in four sides can be obtained
Item combination, as shown in Figure 8；
S6 it) combines glass bar and carries out positional dissection slitting using vision positioning laser equipment to get encapsulated to four sides
Light guide plate.
This preparation method is simple, it is easy to operate, laborsaving it is time saving, reliability is higher, cost is relatively low, does not need complicated board
Equipment, therefore practicability is preferable, application easy to spread, has larger practical value.
Embodiment 4
The present embodiment is a kind of encapsulated jig of light guide plate, and structure is as shown in figure 9, the encapsulated jig includes:
(A) two transparent substrates, the first transparent glass substrate 301 and the second transparent glass substrate 302；
(B) UV solves viscous double faced adhesive tape 303, and when use has one group of UV to solve viscous double faced adhesive tape to be adhered to the first transparent glass respectively
On substrate 301 and the second transparent glass substrate 302, it is used to support light guide plate main body 10 and makes light guide plate main body 10 and two transparent bases
Plate separation；
(C) sealing element 305 are acrylic adhesive tape, are set to the first transparent glass substrate 301 and the second transparent glass substrate
Between 302；
First transparent glass substrate 301 and the second transparent glass substrate 302 are square structure, in sealing, sealing element
Three adjacent sides of 305 pair of first transparent glass substrate 301 and the second transparent glass substrate 302 are sealed, and stay a line
Blow-by is simultaneously used as gum-injecting port；The acrylic adhesive tape and two transparent glass substrates form an accommodation space, and UV solution is viscous
Double faced adhesive tape is located in the accommodation space；
Wherein, and two transparent glass substrates towards what UV solved viscous double faced adhesive tape are equipped with anti-sticking film plating layer on one side.
Embodiment 5
The present embodiment is a kind of preparation method of light guide plate, comprising the following steps:
S1 the encapsulated jig in embodiment 4) is provided, which includes that two pieces of glass substrates and UV solve viscous double-sided adhesive
Band；The thickness of adhesive tape is corresponding with encapsulated thickness is needed；
It is good according to certain gap arrangement by multiple light guide plate main bodies, i.e. strip sheet glass, and sheet glass is pasted on
UV is solved on viscous double faced adhesive tape, and sheet glass and UV are then solved viscous double faced adhesive tape and pasted on the first transparent glass substrate together；
S2 it) will be fixed as the acrylic adhesive tape of sealing element along adjacent three edges of the first transparent glass substrate, then
Lid closes the second transparent glass substrate, and wherein the thickness of acrylic adhesive tape is greater than after lid closes the first transparent glass substrate and second saturating
The distance between bright glass substrate is squeezed by compression and realizes sealing；
S3 encapsulation die is placed vertically), and reflective layer glue is made every effort to overcome into adhesive tape from the unsealing Asia as gum-injecting port
Side injection, gap of the reflective layer glue after gum-injecting port injection between sheet glass flow from the top to the bottom, and finally make reflective layer
Glue submerges sheet glass, completes injecting glue；
S4 UV adhesive curing) is made by irradiation on the two sides of two glass substrates using UV equipment, is formed instead in glass sheet surface
Photosphere, while releasing the viscosity of UV solution adhesive tape；
S5 two pieces of glass substrates) are opened, UV is torn and solves viscous double faced adhesive tape, the encapsulated a plurality of glass bar group in four sides can be obtained
It closes；
S6 it) combines glass bar and carries out positional dissection slitting using vision positioning laser equipment to get encapsulated to four sides
Light guide plate.
Embodiment 6
The present embodiment is a kind of light guide plate, and structure is as shown in Figure 10, the present embodiment compared with Example 1, difference
It is, the surface of the reflective layer 20 in the present embodiment coats one layer of black shading protective layer 21.Other structures and embodiment 1 are homogeneous
Together.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of light guide plate characterized by comprising
Light guide plate main body, the transmission plane being oppositely arranged including the plane of incidence, with the plane of incidence and between the plane of incidence and described
Scattering surface between transmission plane, and
Reflective layer is covered in the scattering surface surface；
Wherein, the refractive index of the reflective layer is lower than the refractive index of the light guide plate main body, it is preferable that the refraction of the reflective layer
Rate lower than the refractive index of the light guide plate main body 0.2 or more.
2. light guide plate according to claim 1, which is characterized in that the light guide plate main body is glass or transparent polymer；
Preferably, light transmittance >=90% of the light guide plate main body；
Preferably, it is UV glue that the reflective layer is raw materials used；
Preferably, the reflective layer with a thickness of 0.1-0.2mm；
Preferably, surface roughness≤50nm of the reflective layer；
Preferably, the light guide plate further includes the shading protective layer for being formed in the reflective layer surface；
Preferably, the surface roughness of the shading protective layer is 100-300nm.
3. a kind of encapsulated jig for being used to prepare light guide plate of any of claims 1 or 2 characterized by comprising
Two transparent substrates, including the first transparent substrate and the second transparent substrate, and
Supporting element is set between two transparent substrates, is used to support light guide plate main body and is made light guide plate main body and two transparent substrates
Separation；
Wherein, two transparent substrates are equipped with anti-sticking film plating layer towards the supporting element on one side.
4. encapsulated jig according to claim 3, which is characterized in that the supporting element is that UV solves viscous double faced adhesive tape or heating
Viscous double faced adhesive tape is solved, preferably UV solves viscous double faced adhesive tape；
Preferably, the surface roughness of first transparent substrate and second transparent substrate is 5-20nm；
Preferably, the anti-sticking film plating layer is AS water proof anti-soil film；
Preferably, the encapsulated jig includes the pedestal for fixing the first transparent substrate position, and the pedestal includes rectangular-ambulatory-plane
Framework, and the locating piece on rectangular-ambulatory-plane framework surface is set；
Preferably, the L-shaped four corners for being distributed in rectangular-ambulatory-plane framework surface of the locating piece.
5. encapsulated jig according to claim 3 or 4, which is characterized in that including sealing element, the sealing element and two transparent
Substrate at least forms an accommodation space, and the supporting element is located in the accommodation space, and side is equipped with gum-injecting port；
Preferably, the sealing element is sealing joint strip；
Preferably, the sealing joint strip is acrylic adhesive tape or foam tape.
6. a kind of preparation method of light guide plate of any of claims 1 or 2, which comprises the following steps:
S1 encapsulated jig described in claim 3 or 4) is provided, it is transparent that N number of light guide plate main body by supporting element is placed in first
On substrate, wherein the natural number that N is >=1；
S2 reflective layer glue) is coated, reflective layer glue is made to submerge the light guide plate main body；
S3) lid closes the second transparent substrate, contacts second transparent substrate with the reflective layer glue；
S4) solidify reflective layer glue, form reflective layer on the light guide plate main body surface；
S5 the encapsulated jig) is removed, the light guide plate is obtained.
7. preparation method according to claim 6, which is characterized in that when the second transparent substrate of Gai He, with the second transparent base
A side of plate is axis, and the second transparent substrate is gradually transferred in a manner of tilt rotation.
8. a kind of preparation method of light guide plate of any of claims 1 or 2, which comprises the following steps:
S1) encapsulated jig described in claim 5 is provided, N number of light guide plate main body is placed in the first transparent base by supporting element
On plate, wherein the natural number that N is >=1；Then lid closes the second transparent substrate, and is sealed to form receiving leaded light with sealing strip
The accommodation space of plate main body；
S2 reflective layer glue) is injected into the accommodation space from the gum-injecting port, reflective layer glue is made to submerge the light guide plate
Main body；
S3) solidify reflective layer glue, form reflective layer on the light guide plate main body surface；
S4 the encapsulated jig) is removed, the light guide plate is obtained.
9. a kind of optical sensor, which is characterized in that including light guide plate of any of claims 1 or 2.
10. a kind of electronic equipment, which is characterized in that including optical sensor as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910014177.XA CN109725380B (en) | 2019-01-07 | 2019-01-07 | Light guide plate and preparation method thereof, rubber coating jig, optical sensor and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910014177.XA CN109725380B (en) | 2019-01-07 | 2019-01-07 | Light guide plate and preparation method thereof, rubber coating jig, optical sensor and electronic equipment |
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| Publication Number | Publication Date |
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| CN109725380A true CN109725380A (en) | 2019-05-07 |
| CN109725380B CN109725380B (en) | 2020-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111976081A (en) * | 2019-05-23 | 2020-11-24 | 宁波舜宇光电信息有限公司 | Molding method for optical element and corresponding jig and mold |
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| EP1750150A1 (en) * | 2005-07-25 | 2007-02-07 | Research In Motion Limited | Shared light pipe for message indicator and light sensor of ambient light |
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| CN109725380B (en) | 2020-12-22 |
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