CN209728383U

CN209728383U - Optical detection apparatus, backlight module, liquid crystal display device and electronic equipment

Info

Publication number: CN209728383U
Application number: CN201921809685.9U
Authority: CN
Inventors: 林峰; 朱文龙; 周扬
Original assignee: Shenzhen Fushi Technology Co Ltd
Current assignee: Shenzhen Fushi Technology Co Ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2019-12-03
Anticipated expiration: 2029-10-25

Abstract

The utility model discloses a kind of optical detection apparatus, including liquid crystal display device and detection mould group.Liquid crystal display device includes liquid crystal display panel and backlight module.Backlight module includes: that back light unit is used to provide the visible light beam to liquid crystal display panel；Bottom case is used to support the back light unit, the aperture with face back light unit on the bottom case；And protection location, it is located in the aperture, provides rigid support for the part to the back light unit face aperture and for through detection light beam.Detection mould group is located at below backlight module; for receiving the detection light beam of the biological information with external object through liquid crystal display panel, back light unit and protection location, and convert the biological information that the detection light beam obtains external object into electric signal.In addition, the utility model additionally provides the backlight module for the optical detection apparatus, liquid crystal display device and the electronic equipment including the optical detection apparatus.

Description

Optical detection apparatus, backlight module, liquid crystal display device and electronic equipment

Technical field

The utility model relates to field of photoelectric technology more particularly to a kind of optical detection apparatus and its backlight module and displays Device and electronic equipment with the optical detection apparatus.

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 the electronic products such as mobile phone is that screen accounting with higher is same When have fingerprint detection or other biological feature detection function.In order to realize screen comprehensively or close to screen effect comprehensively, so that electronics Product has high screen accounting, and the biological characteristic detection technique under shielding is come into being.However, non-with other for liquid crystal display Self-luminous class display, the prior art is suitable not yet to shield lower detection scheme.

Utility model content

In view of this, the present invention provides optical detection apparatus and its backlight that one kind can improve prior art problem Mould group and liquid crystal display device and electronic equipment with the optical detection apparatus.

The one aspect of the utility model provides kind of an optical detection apparatus, comprising:

Liquid crystal display device, the backlight module including liquid crystal display panel and below liquid crystal display panel, the back Optical mode group is used to provide visible light beam for the liquid crystal display panel, and the liquid crystal display panel is shown for image；Wherein, institute Stating backlight module includes:

Back light unit, including backlight and optical diaphragm group, the backlight are located at the side of the optical diaphragm group, use In providing visible light beam to the optical diaphragm group, the optical diaphragm group is for being converted to the visible light beam from backlight Area source, and the visible light beam after conversion is provided to the liquid crystal display panel, to realize that image is shown；

Side frame, positioned at the side of the back light unit；

Bottom case, positioned at the lower section of the back light unit, the bottom case is connected with the side frame, the bottom case and the side An accommodating space is collectively formed in frame, and for accommodating the back light unit, and the bottom case is also used to support the back light unit, institute Bottom case is stated with aperture, the aperture is the through-hole through the bottom case, and the aperture is located at the lower section of the back light unit； With

Protection location is located in the aperture, for sealing the aperture so that back light unit cannot be opened by described Hole is connected with the outside of backlight module, rigid support is provided for the part to aperture described in the optical diaphragm group face, And for through detection light beam, wherein the wavelength of the detection light beam is different from the wavelength of visible light beam；With

Mould group is detected, is located at below the backlight module, the detection mould group is used to penetrate the liquid crystal display panel, back Light unit and the protection location receive the detection light beam of the biological information with external object, and convert the detection Light beam is biological information of the electric signal to obtain external object.

In certain embodiments, the bottom case have upper surface towards back light unit and it is opposite with the upper surface under Surface, the upper surface of the protection location and the upper surface of bottom case are concordant.

In certain embodiments, the lower section for being at least partially disposed at the bottom case of the protection location and the following table with bottom case Face paste is closed, or, the lower surface of the protection location is concordant with the lower surface of the bottom case, or, the lower surface of the protection location Higher than the lower surface of the bottom case, or, the lower surface of the protection location is lower than the lower surface of the bottom case, or, the protection Unit fills the entire aperture.

In certain embodiments, the hardness of the protection location is identical with the hardness of the bottom case, alternatively, the protection is single The hardness of member is greater than the hardness of the bottom case, alternatively, the hardness of the protection location is less than the hardness of the bottom case, and the guarantor Preset percentage of the hardness of shield unit not less than the hardness of the bottom case.

In certain embodiments, the preset percentage is 50%, 60%, 70%, 80%, 85%, 90% or 95%.

In certain embodiments, the detection mould group has visual field scope, and the optical diaphragm group is in the field angle Do not have through-hole, visual field scope described in the aperture face in range.

In certain embodiments, the protection location includes resin substrate and the upper surface that the resin substrate is arranged in And/or the infrared printing ink of lower surface, the upper surface of the resin substrate are in face of the surface of the back light unit, the resin base The lower surface of plate is in face of the surface of the detection mould group, and the resin substrate can provide the back light unit hardness branch Support.

In certain embodiments, the resin substrate is transparent resin substrate, described in the infrared printing ink at least covers Detect the upper surface of transparent resin substrate and/or the regional area of lower surface described in the visual field scope face of mould group.

In certain embodiments, the optical diaphragm group of the back light unit includes the reflection stacked gradually on the bottom case Piece, light guide plate, optical diaphragm layer, the light guide plate include bottom surface towards the reflector plate, towards the optical diaphragm layer Top surface, the side between the bottom surface and top surface, the backlight is arranged adjacent to a side of the light guide plate, described Backlight emits visible light beam, and the visible light beam enters light guide plate from the side of light guide plate and can go out from the top surface of light guide plate It penetrates, the reflector plate is used to the visible light beam appeared from bottom surface of light guide plate being reflected back light guide plate, and the optical diaphragm layer is used for Diffusion and/or blast provide the visible light beam to the LCD display after the visible light beam that guide-lighting plate top surface is emitted Plate, the reflector plate, light guide plate and optical diaphragm layer are transmissive to the detection light beam.

In certain embodiments, the detection mould group has visual field scope, the reflector plate and the optical diaphragm layer Do not have through-hole in the visual field scope.

In certain embodiments, the reflector plate is located on the upper surface of the bottom case and directly connects with the upper surface Touching.

In certain embodiments, the protection location is different with the material of the bottom case, wherein the protection location is to inspection The transmitance for surveying light beam is greater than 70%, and the bottom case is greater than 0 to the transmitance of the detection light beam and less than 10%, alternatively, described Bottom case is 0 to the transmitance of the detection light beam.

In certain embodiments, the protection location include or for glass, resin, saturating near infrared light ink in it is any One or more of combinations.

In certain embodiments, the optical detection apparatus has orthogonal length axis and width axes, the optics Detection device includes the top and bottom being oppositely arranged along lengthwise direction, and the spacing of center to the bottom of the aperture is 0 to 15 millimeter or 0 to 20 millimeter or no more than the 1/3 of the top-to-bottom distance.

In certain embodiments, the optical detection apparatus further comprises emitting mould train, and the emitting mould train is for sending out Penetrate detection light beam, the detection light beam projects in the external object above liquid crystal display device, external object transmission and/ Or the reflection detection light beam is to form the detection light beam for having external object biological information, it is described to have external object The detection light beam of biological information can be through the liquid crystal display panel, back light unit and protection location by the detection mould Group receives.

In certain embodiments, the detection light beam is near infrared light, and the optical detection apparatus is for detecting fingerprint letter Breath.

In certain embodiments, 5 millimeters of the circle or side length that the cross section of the aperture is 5 millimeters to 6 millimeters of diameter are extremely 6 millimeters rectangular, the bottom case with a thickness of 0.1 millimeter, aperture described in the detection mould group face is arranged in the backlight mould The spacing of the lower surface of the bottom case of the lower section of the bottom case of group, the detection mould group and the backlight module is 0.5 millimeter to 1 milli Rice.

In certain embodiments, the bottom case is made of metal or alloy material.

In certain embodiments, perforative through-hole is provided on the center, the detection mould group is mounted on the through-hole In.

In certain embodiments, the display device further includes protective layer, is located above the display panel, the center It is mutually fixed with the edge of the protective layer.

In certain embodiments, the display device is the display screen of hard.

In certain embodiments, the protection location is provided by the part to aperture described in the optical diaphragm group face Deformation occurs to prevent the optical diaphragm group in the tapping for rigid support.

The one aspect of the utility model provides a kind of backlight module, and the backlight module is in above-mentioned optical detection apparatus Backlight module.

The one aspect of the utility model provides a kind of liquid crystal display device, and the liquid crystal display device is the inspection of above-mentioned optics Survey the liquid crystal display device in device.

The one aspect of the utility model provides a kind of electronic equipment, and the electronic equipment includes above-mentioned optical detection dress It sets.

The beneficial effects of the utility model are that protection location is capable of providing reliable rigid support to back light unit.Institute State back light unit tapping because expand with heat and contract with cold, external object pressing etc. extraneous factors and lead to the problem of bad deformation and obtain It is effectively improved, ensure that the detection light beam that detection mould group is received by the protection location is special for generating external object biology Imaging effect when image is levied, the electronic equipment, optical detection apparatus, backlight module have preferable optical property, can For realizing preferable biological characteristic detection effect and display effect.In addition, the backlight list can be isolated in the protection location Member is connected to by the aperture and external environment, can effectively avoid steam, dust to the shadow of the optical property of back light unit It rings.

Detailed description of the invention

Fig. 1 is the schematic top plan view of one embodiment of the utility model optical detection apparatus；

Fig. 2 is the partial cutaway schematic view of optical detection apparatus shown in Fig. 1；

Fig. 3 is the schematic diagram of optical detection apparatus shown in Fig. 2；

Fig. 4 is the partial schematic diagram of one embodiment of the utility model optical detection apparatus；

Fig. 5 is the further schematic diagram of optical detection apparatus shown in Fig. 4；

Fig. 6 is the partial schematic diagram of one embodiment of the utility model optical detection apparatus.

Specific embodiment

In the specific descriptions to the utility model embodiment, it should be understood that when substrate, 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.

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts Every other embodiment obtained, fall within the protection scope of the utility model.

Following disclosure provides many different embodiments or example is used to realize the different structure of the utility model. In order to simplify the disclosure of the utility model, hereinafter to the component of specific examples and being set for describing.Certainly, they are only Example, and purpose does not lie in limitation the utility model.In addition, the utility model can in different examples repeat reference numerals And/or reference letter, this repetition are for purposes of simplicity and clarity, itself not indicate discussed various embodiments And/or the relationship between setting.In addition, the example of various specific techniques and material that the utility model provides, but this Field those of ordinary skill can be appreciated that the application of other techniques and/or the use of 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 to provide and fully understand to the embodiments of the present invention. However, one of ordinary skill in the art would recognize that, without one or more in the specific detail, or using other knots Structure, constituent element etc. can also practice the technical solution of the utility model.In other cases, it is not shown in detail or describes known knot Structure or operation are to avoid fuzzy the utility model.

It is the schematic diagram of one embodiment of the utility model optical detection apparatus 1 please refer to Fig. 1 to Fig. 2, Fig. 1. Fig. 1 is the stereoscopic schematic diagram of optical detection apparatus 1, and Fig. 2 is that optical detection apparatus 1 is illustrated along the cut-away section of line A-A in Fig. 1 Figure, also shows external object 1000.The optical detection apparatus 1 has length axis along the y axis, along the x axis Width axes and thickness axis along Z-direction.The optical detection apparatus 1 has the central axis 113 for being parallel to length axis, described Optical detection apparatus 1 is about the central axis 113 substantially at axial symmetry.Optionally, the line A-A is the optical detection apparatus 1 central axis 113 or on the parallel lines of central axis 113.

The optical detection apparatus 1 includes display device 10.The display device 10 includes protective layer 11, display panel 12 With backlight module 13.Display panel 12 is located at the lower section of protective layer 11, and backlight module 13 is located at the lower section of display panel 12.It is described For providing backlight beam to the display panel 12, the backlight beam can go out backlight module 13 through the protective layer 11 It is mapped to the top of protective layer 11.The backlight beam is visible light beam.The display panel 12 utilizes the backlight beam through it Realize that information is shown, such as, but not limited to: the display panel 12 shows text information or image letter under backlight beam illumination Breath.The protective layer 11 is for protecting display panel 12 not by the influence of external environment.The display module 12 is for example but not It is limited to for liquid crystal display die set, the display device 10 correspondingly such as, but not limited to liquid crystal display device or liquid crystal display Screen.The display device 10 is the display screen of hard, can not be bent, and is existed obviously not with the flexible display screen that can be bent Together.

The optical detection apparatus 1 further includes detection mould group 19.The detection mould group 19 is at least partially disposed at the back The lower section of optical mode group 13.The detection mould group 19 is used for protective layer 11, display panel 12, backlight through the display device 10 Mould group 13 receives the detection light beam 101 of the biological information with external object 1000.The detection light beam 101 and the back The wavelength of light light beam is different.The detection light beam 101 is such as, but not limited to 750 to 2000 nanometers of wave-length coverage of near-infrared Light or 800 to 1000 nanometers of wave-length coverage of near infrared light or other can be used for biological characteristic detection and identification it is invisible Light.In this application, it is illustrated so that the detection light beam 101 is near infrared light as an example.

The optical detection apparatus 1 further includes center 15.The detection mould group 19 is such as, but not limited to arranged described On center 15.The center 15 is that being set to for electronic equipment is among display device 10 and rear cover (not shown) and interior for carrying The frame of portion's various assemblies (for example, battery, mainboard, camera, microphone, earpiece etc.).The center 15 and the display device There are gaps between 10.The center 15 is such as, but not limited to made of metal or alloy material.The quantity of the center 15 It can be one, or two.When the quantity of the center 15 is two, for example including inner central frame and outer central frame, In, inner central frame is for carrying mobile phone components, for example, mould group 19, outer central frame are not arranged outside inner central frame for detection, outer central frame is along outer Equipped with mobile phone key, inner central frame is integrated with outer central frame.

Optionally, in some embodiments, the center 15 is provided with through-hole (not shown).The detection mould group 19 is arranged In the through hole.So, ground is changed, in certain other embodiments, the center 15 can also be not provided with the through-hole, The center 15 is arranged on the upper surface of the display device 10 in the detection mould group 19.

Optionally, in some embodiments, the protective layer 11 includes opposite first surface 111 and second surface 112. The display panel 12 is located at the side of the second surface 112 of the protective layer 11.The protective layer 11 has transparent region 120 The nontransparent region 110 being located at around transparent region 120 and.The transparent region 120 is transmissive to visible light, described nontransparent Region 110 can block visible light.

Optionally, in some embodiments, the nontransparent region 110 is used for through detection light beam 101 and blocks visible Light beam.The nontransparent region 110 to it is described detection light beam 101 transmitance be greater than 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85% or 90%.When transmitance of the nontransparent region 110 to the detection light beam 101 is bigger, the detection light beam 101 intensity after penetrating the protective layer 11 is bigger.In addition, visible light beam is blocked in the nontransparent region 110 Refer to: the nontransparent region 110 is to the transmitance of visible light beam less than 10%, 5% or 1% or even the nontransparent region 110 Transmitance to visible light beam is 0.It is described non-when the nontransparent region 110 is smaller to the transmitance of the visible light beam Transparent region 110 is more to blocking for the visible light beam.Certainly, ground is changed, the nontransparent region 110 is to visible light beam Transmitance be also not limited to less than 10%, as long as being seen not from the external of the protective layer 11 through the nontransparent region 110 To internal element.The nontransparent region 110 for example but is not limited to by absorbing and/or reflecting the visible light beam, The visible light beam is blocked to realize.

Optionally, in some embodiments, the protective layer 11 may include transparent material, such as, but not limited to, transparent Glass, transparent polymer material, any other transparent material etc..The protective layer 11 can be single layer structure or multilayer knot Structure.The protective layer 11 substantially has the thin plate of predetermined length, width, thickness.The length axis of the protective layer 11 corresponds to attached Y-axis in figure, the X-axis in width axes respective figure, the Z axis in thickness axis respective figure.

Optionally, in some embodiments, the protective layer 11 includes that transparent substrate (not indicating) and ink layer (are schemed not Show).Transparent substrate is the main part of the protective layer 11, and ink layer is bonded with the portion lower surface of transparent substrate.The guarantor The part of the nontransparent region 110 of sheath 11 ink layer described in the ink layer and the transparent substrate face is constituted.It is described Part of the transparent region 120 of protective layer 11 by the transparent substrate not with ink layer face is constituted.

Optionally, the first surface 111 may include the upper surface of the transparent substrate, and the second surface 112 can With include the ink layer back to the transparent substrate lower surface and the transparent substrate lower surface not with the ink The part of layer face.The transparent substrate is such as, but not limited to glass, plastics, resin or any other transparent material.It is described Ink layer is such as, but not limited to be transmissive near infrared light and blocks the infrared printing ink of visible light.

It is appreciated that protective layer 11 described herein may include the plastic foil that user attaches in actual use, tempering Film or other films etc., the first surface 111 of protective layer 11 are when carrying out biological characteristic detection, and external object 1000 directly contacts Surface.The first surface 111 be the outermost of the optical detection apparatus 1 or the first surface 111 be include described The outermost of the electronic equipment of optical detection apparatus 1.Herein, such as, but not limited to, external object 1000 can be finger, raw Object feature, which detects, such as, but not limited to be included or detects for fingerprint detection or fingerprint characteristic.The optical detection apparatus 1 can lead to The detection light beam 101 for crossing biological information of the acquisition with external object 1000 obtains the biological characteristic letter of external object 1000 Breath, and then realize the biological characteristic detection under screen.In addition, the optical detection apparatus 1 can be used in detecting external object 1000 Location information, generate external object 1000 image, detect the object information etc. of exterior space.

In addition, the electronic equipment is such as, but not limited to consumer electrical product, household formula electronic product, vehicular electronics The electronic product of the suitable types such as product, financial terminal product.Wherein, consumer electrical product be, for example, mobile phone, tablet computer, Laptop, tabletop display, computer all-in-one machine etc..Household formula electronic product is, for example, intelligent door lock, TV, refrigerator etc.. Vehicular electronic product is, for example, automatic navigator, vehicle-carrying DVD etc..Financial terminal product is, for example, ATM machine, self-service transacting business Terminal etc..

Optionally, the edge of the center 15 and the protective layer 11 is mutually fixed.

Optionally, the backlight module 13 includes the bottom case 132 and back light unit 131 for stacking gradually setting from the bottom to top, The back light unit 131 is used to provide the described backlight beam, and the bottom case 132 is used to support and protects the back light unit 131. Optionally, in some embodiments, the backlight module 13 further includes the side frame 134 being connected with bottom case 132, the side frame 134 Positioned at the side of the back light unit 131.An accommodating space is collectively formed in the bottom case 132 and the side frame 134, for accommodating The back light unit 131.

Optionally, the bottom case 132 is structure as a whole with the side frame 134.

Optionally, the backlight module 13 can further comprise glue frame (not shown).The glue frame is arranged in the side frame 134 inside, for accommodating the back light unit 131.In some embodiments, the glue frame also alternative side frame 134.

The bottom case 132 has upper surface and the lower surface opposite with the upper surface towards back light unit 131.It is described Bottom case 132 has aperture 133, and the aperture 133 is the through-hole through the bottom case 132.Detecting light beam 101 can be by external right As successively being reached through the protective layer 11, display panel 12, back light unit 131, aperture 133 after 1000 transmissions and/or reflection The detection mould group 19, the detection mould group 19 receive the detection light beam 101 and are converted to electric signal to obtain external object 1000 biological information, such as, but not limited to, the living bodies letter such as the biometric image information of external object 1000, blood oxygen Breath.Optionally, in some embodiments, the aperture 133 of the bottom case 132 can be one or more, and the bottom case 132 is extremely Few part has the aperture 133.

There are gaps between the center 15 and the bottom case 132.Optionally, in some embodiments, the detection mould There are gaps between group 19 and the bottom case 132.It should be appreciated that between existing between the detection mould group 19 and the bottom case 132 Gap is intended in order to enable the distance between the upper surface of the display device 10 and optical centre of detection mould group 19 meet imaging Condition.So, ground is changed, can also be to be close to set between the detection mould group 19 and the bottom case 132 in certain embodiments It sets, and gap is not present.

Optionally, in some embodiments, the detection mould group 19 has preset field angle FOV, is located at field angle FOV Interior detection light beam 101 can be received and converted to electric signal by the detection mould group 19.The first surface 111 has and institute State the corresponding field of view VA of field angle FOV of detection mould group 19.The diameter of the aperture 133 meets the detection mould group 19 field angle FOV will not be blocked by bottom case 132.It is believed that the corresponding range of the aperture 133 is not less than the bottom case 132 are located at the part in the visual field scope of the detection mould group 19.

So, ground is changed, in some embodiments, the corresponding range of the aperture 133 can also be slightly less than the bottom case 132 are located at the part in the visual field scope of the detection mould group 19.

Optionally, in some embodiments, the center of the aperture 133 is located at the protective layer of the optical detection apparatus 1 On 11 central axis or it is located near the central axis.

Optionally, in some embodiments, the detection mould group 19 includes lens module and imaging sensor, detects light beam 101 are converted to electric signal by imaging sensor after lens module.The lens module has optical centre, with the optics Center is that the field angle FOV on vertex can be for such as, but not limited to: 100 degree ~ 140 degree or 120 degree ~ 130 degree.Optionally, institute State detection mould group with a thickness of 1 to 2 millimeter or 2 to 3 millimeters or 3 to 4 millimeters.

Optionally, the detection mould group 19 includes ultra-thin lens array and imaging sensor, and the detection light beam is via institute Ultra-thin lens array is stated to reach described image sensor and be converted to the electric signal of correspondence image information by described image sensor. At this point, it is described detection mould group 19 thickness can be 0 to 1 millimeter, such as, but not limited to, it is described detection mould group with a thickness of 0.4 Millimeter.

Optionally, by taking external object 1000 is finger as an example, when carrying out fingerprint characteristic detection, external object 1000 is touched Field of view VA enters the protective layer 11 from the field of view VA via the detection light beam 101 that external object 1000 returns And the detection mould group 19, the detection are reached through the protective layer 11, display panel 12, back light unit 131, aperture 133 Mould group 19 receives the detection light beam 101 and is converted into electric signal corresponding with the finger print information of external object 1000.It is described next From the detection light beam 101 of external object 1000 for example including but be not limited to the detection light of the transmission of external object 1000 and/or reflection Beam 101.The detection light beam 101 includes or is near infrared light, such as, but not limited to, the near-infrared of 800 ~ 2000nm of wave-length coverage Light.

Optionally, the optical detection apparatus 1 includes along the top and bottom that length axis is oppositely arranged, the aperture 133 The spacing of center to the bottom be 0 to 15 millimeter or 0 to 20 millimeter or no more than the top-to-bottom distance 1/3。

The bottom case 132 is such as, but not limited to made of metal or alloy material, in above-described embodiment, the backlight module 13 can have aperture 133, enable to detection light beam 101 through without being blocked by bottom case 132.

Since bottom case 131 is used to support and protects back light unit 131, thus back light unit 131 at corresponding aperture 133 by The support and protective effect arrived are smaller.Extraneous dust, steam etc. may also reach back light unit 131 by the aperture 133, So that the optical property of back light unit 131 is influenced, under the display effect and biological characteristic detection performance that lead to optical detection apparatus 1 Drop.Although being found however, inventor passes through a large amount of experiment with analysis in addition, the display device 10 is the display screen of hard, At aperture 133, back light unit 131 is easy may to be expanded with heat and contract with cold, adsorb by external environment influence, the bad change such as warpage Shape.When optical detection apparatus 1 is used as fingerprint detection, external object 1000 is finger, and external object 1000 presses the protection Layer 11, it is also possible to back light unit 131 be caused to occur bad deformation at aperture 133.As shown in figure 3, due to not having at aperture 133 Support, the back light unit 131 are easy to appear the corresponding aperture 133 of undesirable deformation, especially back light unit 131 at aperture 133 There is out-of-flatness in the surface at place, and the optical property of back light unit 131 is caused to decline.It is appreciated that back light unit 131 is in aperture After there is bad deformation at 133, detection mould group 19 receives the optics generated after detection light beam 101 through the back light unit 131 Image is easy to appear the problems such as Newton's ring, water ripples.

Referring to Fig. 4, being the partial cutaway schematic view of one embodiment of the application.Fig. 4 shows optical detection apparatus The partial cutaway schematic view of 1a, the optical detection apparatus 1a and optical detection apparatus shown in Fig. 21 have essentially identical knot Structure.For convenience of description, identical/similar element numbers are consistent in optical detection apparatus 1a and optical detection apparatus 1, ability Field technique personnel could be aware that understanding, repeat no more in the present embodiment.Optical detection apparatus 1a is compared to optical detection apparatus 1 Difference is: optical detection apparatus 1a includes the protection location 135 in aperture 133.The protection location 135 is for sealing The aperture 133 is so that back light unit 131 cannot be connected with the outside of backlight module 13 by the aperture 133, is used for Rigid support is provided to the part of aperture 133 described in 131 face of back light unit and for through detection light beam 101.

The bottom case 131 has in face of the upper surface of the back light unit 131, and back to the back light unit 131 Lower surface.Optionally, in some embodiments, the protection location 135 fills the entire aperture 133, and the protection The thickness of the thickness of unit 135 and the bottom case 132 is for example of substantially equal.It is considered as bottom case 132 being located at aperture 133 originally The partial replacement at place is the protection location 135.

The protection location 135 is whole for example with suitable hardness, can be at least corresponding of the back light unit 131 The part of the aperture 133 or the part at least corresponding to the protection location 135 of the back light unit 131 provide hardness branch Support.Such as, but not limited to, the protection location 135 for provides with the essentially identical rigid support of bottom case 132, alternatively, institute The hardness for stating protection location 135 is greater than the hardness of the bottom case 135, alternatively, the hardness of the protection location 135 is less than the bottom The hardness of shell 135, and the hardness of the protection location 135 is not less than the preset percentage of the hardness of the bottom case 132.It is described pre- If percentage for example 50%, 60%, 70%, 80%, 85%, 90% or 95%.Certainly, the application is not limited thereto, as long as described Protection location 135 is capable of providing the various possible embodiments of rigid support at the aperture 133, should all fall in the guarantor of the application Protect range.

The transmitance of 135 pairs of protection location detection light beams 101 is greater than or equal to 60%, 70%, 80%, 90%, 95%.

Optionally, the protection location 135 is provided by the part to aperture 133 described in 131 face of back light unit Deformation occurs at the aperture 133 to prevent the optical diaphragm group for rigid support.

The detection mould group 19 can be through the protective layer 11, display panel 12, back light unit 131, at least part of Protection location 135 receives the detection light beam 101 of the biological information with external object 1000, and converts the detection light beam 101 be biological information of the corresponding electric signal to obtain external object 1000.

Further, the bottom case 132 and protection location 135 are to the detection in the visual field scope of the detection mould group 19 Light beam 101 do not block or block it is smaller without influence detection accuracy, the detection light beam 101 can be from the visual field scope Reach the detection mould group 19.

Optionally, in some embodiments, the protection location 135 such as, but not limited to includes or for glass, resin, poly- Close object, multi-layer optical film etc..Further alternative, the protection location 135 may include or to be transmissive near infrared light Infrared printing ink, detecting light beam 101 at this time is near infrared light.

Optionally, the protection location 135 include or for resin substrate and be arranged in the resin substrate upper surface and/ Or the infrared printing ink of lower surface.The upper surface of resin substrate is in face of the surface of the back light unit 131, the following table of resin substrate Face is in face of the surface of the detection mould group 19.The infrared printing ink at least covers the visual field scope point of the detection mould group 19 Not with region corresponding to the upper surface of the resin substrate, lower surface.The resin substrate is such as, but not limited to transparent tree Aliphatic radical plate.

The protection location 135 can also suitably be transmissive to detection light beam in addition to that can be product above-mentioned to be other 101 product, as long as the protection location 135 can be made through detection light beam 101 and to back light unit 131 with rigid support With should all then fall into the protection scope of the application.

Since the protection location 135 seals the aperture 133 so that back light unit 131 cannot be by the aperture 133 are connected with the outside of backlight module 13 and provide firmly to the part of aperture 133 described in 131 face of back light unit Property support, therefore, extraneous dust, steam etc. cannot by the aperture 133 reach back light unit 131, to guarantee backlight The optical property of unit 131 is good, and correspondingly, the display effect and biological characteristic detection performance of optical detection apparatus 1 are preferable.This Outside, at aperture 133, rigid support of the back light unit 131 due to being protected unit 135, so that optical diaphragm group is because heated The case where extraneous factors such as swollen shrinkage, pressing influence and lead to bad deformation can be improved, and then further ensure light Display effect and the detection performance for learning detection device 1 are preferable.

Referring to Fig. 5, being the further schematic diagram of optical detection apparatus 1a.As shown in figure 5, the back light unit 131 Including optical diaphragm group (not indicating) and backlight (not shown).The backlight is located at the side of the optical diaphragm group, uses In providing visible light beam to the optical diaphragm group, the optical diaphragm group is for being converted to the visible light beam from backlight Area source, and the visible light beam after conversion is provided to the display panel 12, to realize that picture is shown.Further, the light It learns diaphragm group and does not have through-hole in the visual field scope of the detection mould group 19, detection mould group 19 described in 133 face of aperture Visual field scope.

Optionally, in some embodiments, the optical diaphragm group include the reflector plate 1311 set gradually from the bottom to top, Light guide plate 1312 and optical diaphragm layer 1313.The backlight is located at the side of the light guide plate 1312.The light guide plate 1312 Including the top surface towards optical diaphragm layer 1313, the bottom surface towards reflector plate 1311 and the side towards backlight.Backlight Visible light is issued, the visible light enters light guide plate 1312 from the side of light guide plate 1312, and from light guide plate towards optical film The luminous outgoing in the top surface face of lamella 1313, the optical diaphragm layer 1313 can expand the visible light being emitted from light guide plate 1312 It is provided after scattered and/or blast and arrives the display panel 12.What the reflector plate 1311 was used to for being emitted the bottom surface of light guide plate 1312 Visible reflectance returns in light guide plate 1312.The optical diaphragm layer 1313 may include one or more diffusion sheet (diffusion sheet) and/or brightening piece (brightness enhancement film).Wherein, the reflector plate 1311 It is directly contacted with the upper surface 1321 of the bottom case 132.

The reflector plate 1311, light guide plate 1312 and optical diaphragm layer 1313 are transmissive to detection light beam 101, and in institute The visual field scope for stating detection mould group 19 can all not have through-hole.

Optionally, the protective layer 11 includes transparent substrate 11a and ink layer 11b.Transparent substrate 11a is the protective layer 11 main part, ink layer 11b are bonded with the portion lower surface of transparent substrate 11a.The nontransparent region of the protective layer 11 The part of the 110 ink layer 11b described in the ink layer 11b and the transparent substrate 11a face is constituted.The protective layer 11 Part of the transparent region 120 by the transparent substrate 11a not with ink layer 11b face is constituted.

Optionally, the first surface 111 may include the upper surface of the transparent substrate 11a, the second surface 112 It may include the ink layer 11b back to the lower surface of the transparent substrate 11a and the lower surface of the transparent substrate 11a Not with the part of the ink layer 11b face.The transparent substrate 11a be such as, but not limited to glass, plastics, resin or other Any transparent material.The ink layer 11b is such as, but not limited to be transmissive near infrared light and blocks the infrared oil of visible light Ink.

Optionally, the optical detection apparatus 1 may include emitting mould train 16.The emitting mould train 16 is for emitting detection Light beam 101, the detection light beam 101 can be irradiated to external object 1000.Optionally, 16 face of emitting mould train is nontransparent Region 110 is located at the lower section of the protective layer 11.Some or all of the display panel 12 face transparent region 120 is located at institute State the lower section of protective layer 11.The emitting mould train 16 is in the orthographic projection of the first surface 111 and the display panel 12 in institute The orthographic projection for stating first surface 111 is not overlapped or partly overlaps.Orthographic projection of the emitting mould train 16 in the first surface 111 Orthographic projection with the backlight module 13 in the first surface 111 is not overlapped or partly overlaps.

The transmitting of the emitting mould train 16 detection light beam 101, the detection light beam 101 can enter institute from second surface 112 State protective layer 11.Optionally, in some embodiments, the detection light beam 101 can be emitted to protective layer from first surface 111 11 top simultaneously enters inside the external object 1000 for being located at the top of protective layer 11, and then the detection light beam 101 is external Object 1000 transmits, and described through the protective layer 11, display panel 12, back light unit 131, protection location 135 Mould group 19 is detected to receive.

Further alternative, the emitting mould train 16 includes or for LED(light emitting diode), LD(laser Diode), VCSEL(vertical cavity surface emitting laser), Mini-LED, Micro-LED, OLED One of (organic light emitting diode), QLED(quantum dot light emitting diode) Or it is a variety of, or including one of LED, LD, VCSEL, Mini-LED, Micro-LED, OLED, QLED or a variety of compositions Light emitting array.

Further alternative, in some embodiments, the detection light beam 101 that emitting mould train 16 emits can be in protective layer 11 The detection light beam 101 of inner total reflection transmission, the total reflection transmission can be in 111 contact position of external object 1000 and first surface Diffusing reflection occurs, at least partly irreflexive detection light beam 101 can penetrate the protective layer 11, display panel 12, backlight list Member 131, protection location 135 are received by the detection mould group 19.

Further alternative, in some embodiments, the detection light beam 101 that emitting mould train 16 emits can be emitted to protection The top of layer 11 and external object 1000 are single through the protective layer 11, display panel 12, back light unit 131, protection after reflecting Member 135 is received by the detection mould group 19.

Optionally, in some embodiments, the black light in 101 transmitted ambient light of external object is as detection light beam 101, the detection light beam 101 can penetrate the protective layer 11, display panel 12, back light unit 131,135 quilt of protection location The detection mould group 19 receives.

Optionally, in some embodiments, 101 emitting infrared radiation light of external object, the infrared radiating light is as inspection Surveying light beam 101 can be through the protective layer 11, display panel 12, back light unit 131, protection location 135 by the detection mould Group 19 receives.

The embodiment of the present application reaches detection mould group 19 and the detected received detection light of mould group 19 to from external object 1000 Beam 101 is not construed as limiting, it is described detection light beam 101 can be external object 1000 reflection and/or transmission by the emitting mould train The detection light beam 101 of transmitting, be also possible to environment light by external object 1000 reflect and/or transmit or external object 1000 from The light beam or other possible light beams with 1000 biological information of external object of body transmitting, all can be used as this Shen Detection light beam 101 please.The application optical detection apparatus 1 is obtained outer by the detection mould group 19 reception detection light beam 101 The biological information of portion's object 1000.

So, ground is changed, in some embodiments, the emitting mould train 16 may be alternatively located under the backlight module 13 It is square, for right to outside through the backlight module 13, the display panel 12 and the transmitting detection light beam of the protective layer 11 As 1000.

It for example further include having on the bottom case 132 when the emitting mould train 16 is located at 13 lower section of backlight module The protection location 135 of aperture 133 and the sealing aperture 133 of emitting mould train 16 described in face, 135 energy of protection location The optical diaphragm group of enough apertures 133 described in face provides rigid support.The emitting mould train 16 passes through the protection location 135, back light unit 131, display panel 12 and the outgoing detection light beam 101 of protective layer 11 arrive external object 1000.

Optical detection apparatus 1a includes the protection location 135 being arranged in aperture 133, the protection location 135 have compared with High hardness and the upper surface being substantially flush with the upper surface of the bottom case 132, the protection location 135 are capable of providing reliably It supports to the back light unit 131 or the reflector plate 1311.The back light unit 131 or the reflector plate 1311 are in aperture At 133 because expand with heat and contract with cold, the extraneous factors such as the pressing of external object 100 and lead to the problem of bad deformation and effectively changed It is kind, it ensure that the detection light beam 101 that detection mould group 19 is received by the protection location 135 is biological for generating external object Imaging effect when characteristic image, the optical detection apparatus 1a, backlight module 13 have preferable optical property, can be used in Realize preferable biological characteristic detection effect.Such as, but not limited to, it is implemented for preferable fingerprint detection effect.In addition, The back light unit 131 being connected to by the aperture 133 and external environment, Neng Gouyou can be isolated in the protection location 135 Effect avoids the influence of steam, dust to the optical property of back light unit 131.

Referring to Fig. 6, the change that the optical detection apparatus 1b shown is optical detection apparatus 1a shown in Fig. 4 is implemented Example.Optical detection apparatus 1b and optical detection apparatus 1a has basically same structure, for convenience of description, optical detection apparatus 1b It is consistent with element numbers identical/similar in optical detection apparatus 1a, those skilled in the art could be aware that understanding, this reality It applies in example and repeats no more.Difference is that the protection location 135 of optical detection apparatus 1b is at least partially disposed at the bottom case 132 Lower section.Optionally, the lower surface at least partly with the bottom case 132 of the protection location 135 fits.

Optionally, in some change embodiments, the lower surface of the protection location 135 is higher than under the bottom case 132 Surface, or, the lower surface of the protection location 135 is lower than the lower surface of the bottom case 132.

The cross section of the aperture 133 for example but is not limited to round, oval, rectangular, triangle or polygon.It can Choosing, circle that the cross section of the aperture 133 is 5 millimeters to 6 millimeters of diameter or 5 millimeters to 6 millimeters of side length it is rectangular.

Optionally, the embodiment of the present application and other change embodiments in, it is described detection mould group 19 at least partly face institute State the lower section that the protection location 135 is arranged in protection location 135.

Optionally, the embodiment of the present application and other change embodiments in, between the bottom case 132 and the detection mould group 19 Away from can be 0.5 millimeter to 1 millimeter.The thickness of the bottom case 132 can be 0.1 millimeter, and the thickness of the protection location 135 is not Less than 0.1 millimeter, and the upper surface of the protection location 135 and the upper surface of the bottom case 132 are substantially flush.It needs to illustrate It is in this application, to be substantially flush and be also regarded as concordantly, should also fall into the protection scope of the application.

In the embodiment of the present application and change embodiment, the external object 1000 may include finger or palm etc., described Biological characteristic detection method can be used for detecting the lines information such as fingerprint or palmmprint.

It, can also be with it should be noted that it will be understood by those skilled in the art that identical label can indicate identical element Indicate the similar components that can be changed, replace, extending, combining, individual element/assembly can be applied at other in embodiment Or in change embodiment.About protective layer, display in above-described embodiment or change embodiment of the application and corresponding change setting The structure of panel, backlight module, protection location, detection mould group, emitting mould train, aperture, field angle etc., position can also apply The application other or change embodiment in, thus obtain embodiment and its replacement, deformation, combination, fractionation, extension, omission etc. Belong to the application protection scope.

It should be noted that it will be understood by those skilled in the art that without creative efforts, this is practical Some or all of new embodiment, and the deformation for some or all of embodiment, replacement, change, fractionation, combination, Extension etc. is considered as being covered by the utility model creation thought of the utility model, belongs to the protection scope of the utility model.

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 utility model.At this This phrase that different location occurs in specification might not all refer to identical embodiment.In addition, when combining any implementation When example describes specific feature or structure, is advocated, realize this feature in conjunction with the other embodiments of these embodiments Or structure is within the technical scope of those skilled in the art.

" length " that is likely to occur in the utility model specification, " width ", "upper", "lower", "left", "right", " preceding ", The orientation or position of the instructions such as " rear ", " back side ", " front ", "vertical", "horizontal", " top ", " bottom ", " inside ", " outside " Setting relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model embodiment and simplification is retouched It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, Therefore it should not be understood as limiting the present invention.Similar label and letter indicate similar terms in the accompanying drawings, therefore, once It is defined in a certain Xiang Yi attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.Meanwhile Term " first ", " second " etc. are only used for distinguishing description in the description of the present invention, are not understood to indicate or imply Relative importance.In the description of the present invention, " a variety of " or the meaning of " plurality " is at least two or two, unless otherwise Clear specific restriction.In the description of the utility model, it is also necessary to which explanation is unless specifically defined or limited otherwise, " set Set ", " installation ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected；Can be and be directly connected to, be also possible to by between intermediary in succession It connects, can be the connection inside two elements.For the ordinary skill in the art, can be understood with concrete condition above-mentioned The concrete meaning of term in the present invention.

Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to In this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation Or replacement, it should be covered within the scope of the utility model.Term used in claims should not be construed as Utility model is limited to specific embodiment disclosed in this specification.Therefore, the protection scope of the utility model should be with institute It states subject to scope of protection of the claims.

Claims

1. a kind of optical detection apparatus characterized by comprising

Liquid crystal display device, the backlight module including liquid crystal display panel and below liquid crystal display panel, the backlight mould For providing visible light beam for the liquid crystal display panel, the liquid crystal display panel is shown group for image；Wherein, the back Optical mode group includes:

Back light unit, including backlight and optical diaphragm group, the backlight is located at the side of the optical diaphragm group, for mentioning The optical diaphragm group is given for visible light beam, the optical diaphragm group is used to the visible light beam from backlight being converted to face light Source, and the visible light beam after conversion is provided to the liquid crystal display panel, to realize that image is shown；

Side frame, positioned at the side of the back light unit；

Bottom case, positioned at the lower section of the back light unit, the bottom case is connected with the side frame, and the bottom case and the side frame are total With an accommodating space is formed, for accommodating the back light unit, and the bottom case is also used to support the back light unit, the bottom Shell has aperture, and the aperture is the through-hole through the bottom case, and the aperture is located at the lower section of the back light unit；With

Protection location is located in the aperture, and the upper surface of the protection location and the bottom case are towards the back light unit Upper surface it is concordant, the protection location is for sealing the aperture so that back light unit cannot be by the aperture and backlight The outside of mould group is connected, provides rigid support for the part to aperture described in the optical diaphragm group face and be used for Through detection light beam, wherein the wavelength of the detection light beam is different from the wavelength of visible light beam；

Center is located at below the bottom case, and there are gaps between the bottom case；With

Mould group is detected, is mounted on the center, below the bottom case of the backlight module, the detection mould group is for penetrating The liquid crystal display panel, back light unit and the protection location receive the detection of the biological information with external object Light beam, and convert the biological information that the detection light beam obtains external object into electric signal.

2. optical detection apparatus according to claim 1, which is characterized in that the lower surface of the protection location and the bottom The lower surface of shell is concordant, or, the lower surface of the protection location is higher than the lower surface of the bottom case, or, the protection location Lower surface is lower than the lower surface of the bottom case.

3. optical detection apparatus according to claim 1, which is characterized in that the protection location is at least partially disposed at institute It states the lower section of bottom case and is bonded with the lower surface of bottom case.

4. optical detection apparatus according to claim 1, which is characterized in that opened described in the protection location filling is entire Hole.

5. optical detection apparatus according to claim 1, which is characterized in that the hardness of the protection location and the bottom case Hardness it is identical, alternatively, the hardness of the protection location be greater than the bottom case hardness, alternatively, the hardness of the protection location Less than the hardness of the bottom case, and the hardness of the protection location is not less than the preset percentage of the hardness of the bottom case.

6. optical detection apparatus according to claim 5, which is characterized in that the preset percentage be 50%, 60%, 70%, 80%, 85%, 90% or 95%.

7. optical detection apparatus according to claim 1, which is characterized in that the detection mould group has visual field scope, The optical diaphragm group does not have through-hole, visual field scope described in the aperture face in the visual field scope.

8. optical detection apparatus according to claim 1, which is characterized in that the protection location includes resin substrate and sets The infrared printing ink of the upper surface and/or lower surface in the resin substrate is set, the upper surface of the resin substrate is in face of described The surface of back light unit, the lower surface of the resin substrate are in face of the surface of the detection mould group, and the resin substrate can Rigid support is provided to the back light unit.

9. optical detection apparatus according to claim 8, which is characterized in that the resin substrate is transparent resin base Plate, the infrared printing ink at least cover the upper surface of transparent resin substrate described in the visual field scope face of the detection mould group And/or the regional area of lower surface.

10. optical detection apparatus according to claim 1, which is characterized in that the optical diaphragm group packet of the back light unit The reflector plate, light guide plate, optical diaphragm layer stacked gradually on the bottom case is included, the light guide plate includes towards the reflector plate Bottom surface, the top surface towards the optical diaphragm layer, the side between the bottom surface and top surface, the backlight is adjacent to institute The side setting of light guide plate is stated, the backlight emits visible light beam, and the visible light beam enters from the side of light guide plate Light guide plate can be simultaneously emitted from the top surface of light guide plate, and the reflector plate is used to reflect the visible light beam appeared from bottom surface of light guide plate Light guide plate is returned, the optical diaphragm layer is used to spread and/or blast can by described in after the visible light beam that guide-lighting plate top surface is emitted Light-exposed beam is provided to the liquid crystal display panel, and the reflector plate, light guide plate and optical diaphragm layer are transmissive to the detection light Beam.

11. optical detection apparatus according to claim 10, which is characterized in that the detection mould group has field angle model It encloses, the reflector plate and the optical diaphragm layer do not have through-hole in the visual field scope.

12. optical detection apparatus according to claim 10, which is characterized in that the reflector plate is located at the upper of the bottom case It is directly contacted on surface and with the upper surface.

13. optical detection apparatus according to claim 1, which is characterized in that the material of the protection location and the bottom case Material is different, wherein the protection location is greater than 70% to the transmitance of detection light beam, and the bottom case is saturating to the detection light beam Rate is crossed greater than 0 and less than 10%, alternatively, the bottom case is 0 to the transmitance of the detection light beam.

14. optical detection apparatus according to claim 1, which is characterized in that the protection location include glass, resin, Polymer, multi-layer optical film, saturating near infrared light ink in any one or the combination of several of them.

15. optical detection apparatus according to claim 1, which is characterized in that the optical detection apparatus, which has, mutually to hang down Straight length axis and width axes, the optical detection apparatus includes the top and bottom being oppositely arranged along lengthwise direction, described The spacing of the center of aperture to the bottom is or 0 to 20 millimeter or no more than the 1/3 of the top-to-bottom distance.

16. optical detection apparatus according to claim 1, which is characterized in that the optical detection apparatus further comprises Emitting mould train, the emitting mould train project above liquid crystal display device for emitting detection light beam, the detection light beam External object on, external object transmit and/or reflect the detection light beam to formed with external object biological characteristic letter The detection light beam of breath, the detection light beam with external object biological information can through the liquid crystal display panel, Back light unit and protection location are received by the detection mould group.

17. optical detection apparatus according to claim 1, which is characterized in that the detection light beam is near infrared light, described Optical detection apparatus is for detecting finger print information.

18. optical detection apparatus according to claim 1, which is characterized in that the cross section of the aperture is 5 millimeters of diameter It is rectangular to 6 millimeters of circles or 5 millimeters to 6 millimeters of side length, the bottom case with a thickness of 0.1 millimeter, the detection mould group is just The aperture is arranged in the lower section of the bottom case of the backlight module, under the bottom case of the detection mould group and the backlight module The spacing on surface is 0.5 millimeter to 1 millimeter.

19. optical detection apparatus according to claim 1, which is characterized in that the bottom case is by metal or alloy material system At.

20. optical detection apparatus according to claim 1, which is characterized in that perforative through-hole is provided on the center, The detection mould group installation is in the through hole.

21. optical detection apparatus according to claim 1, which is characterized in that the display device further includes protective layer, position Above the display panel, the edge of the center and the protective layer is mutually fixed.

22. optical detection apparatus according to claim 1, which is characterized in that the display device is the display screen of hard.

23. optical detection apparatus according to claim 1, which is characterized in that the protection location is by giving the optics The part of aperture described in diaphragm group face provides rigid support, and to prevent the optical diaphragm group in the tapping, deformation occurs.

24. a kind of backlight module, which is characterized in that the backlight module is light described in any one of claim 1 to 23 Learn the backlight module of detection device.

25. a kind of liquid crystal display device, which is characterized in that the liquid crystal display device is any one of claim 1 to 23 The liquid crystal display device of the optical detection apparatus.

26. a kind of electronic equipment, which is characterized in that including optical detection apparatus described in any one of claim 1 to 23.