CN109934157A - A kind of backlight module, display device and electronic equipment - Google Patents

Abstract

This application provides a kind of backlight modules, for through the detection light beam for being emitted by external object and/or being reflected to a sensing mould group, biological information of the detection light beam for external object detects, the backlight module can provide backlight light to a display panel, it is characterised in that: the backlight module includes can be through the detection light and the diffusion sheet being diffused to backlight light.In addition, the application also provides a kind of display device and electronic equipment including above-mentioned backlight module.

Description

A kind of backlight module, display device and electronic equipment

Technical field

The application belongs to optical technical field more particularly to a kind of backlight module, display device and electronic equipment.

Background technique

In the prior art, in order to increase the backlight illumination of liquid crystal display, optical film layer is usually set in backlight module, Such as: brightness enhancement film (Brightness Enhancement Film, BEF), prismatic lens etc..Currently, the optical film layer includes saturating The micro-structure of photopolymer substrate and the strip triangular prism formed on the transparent substrates.The micro-structure of the strip triangular prism that This is closely arranged on the transparent substrates without interval.When the backlight light from the backlight module is incident to the film layer list When first, the micro-structure of the strip triangular prism is for concentrating backlight light at random.

Although however, the micro-structure of such strip triangular prism for the backlight light have it is stronger gather effect, It is but to have stronger disperse function for being reflected back into the detection light of liquid crystal display from external object, makes it can not be Focal imaging below backlight module.Therefore it is each to realize to be unable to satisfy current needs setting sensing mould group below liquid crystal display Kind shields the optical path requirements of lower sensing function.

Summary of the invention

In order to solve the above technical problems, the application provides a kind of new-type backlight module, display device and electronic equipment.

The application provides a kind of backlight module, for through the detection light beam for being emitted by external object and/or being reflected to one Mould group is sensed, biological information of the detection light beam for external object detects, and the backlight module can be aobvious to one Show that panel provides backlight light, it is characterised in that: the backlight module includes can be through the detection light and to backlight light The diffusion sheet that line is diffused.

In some embodiments, the diffusion sheet is less than to the backlight light diffusion of the detection light Diffusion.

In some embodiments, the diffusion sheet is for the mist degree of the detection light less than 30%.

In some embodiments, the diffusion sheet includes the optical scattering structure of substrate and formation on the substrate, In, the optical scattering structure is the coarse microstructure of ground-glass appearance or the diffusion particle to mix on substrate；Or, the diffusion Piece is nano-porous films；Or, the diffusion sheet is quantum dot film.

In some embodiments, when the diffusion sheet is nano-porous films, the material of the diffusion sheet is polyethylene Fabric is formed with the aperture of multiple Nano grade sizes on the polyethylene web material.

In some embodiments, when the diffusion sheet is nano-porous films, there are multiple nanometers on the diffusion sheet The aperture of scale dimensions, the size range of the aperture are 100 nanometers to 1000 nanometers.

In some embodiments, the aperture has through infrared or near infrared light and is capable of the spy of scatter visible light Property.

In some embodiments, the detection light is infrared or near infrared light, and the wavelength of the detection light is not It is same as the backlight light, when the diffusion sheet is quantum dot film, the quantum dot film includes multiple quantum dots, the multiple Quantum dot converts the backlight light received as other backlight light of preset wavelength, the backlight light of the preset wavelength after conversion It is dissipated centered on quantum dot, the quantum dot does not absorb infrared or near-infrared wavelength light to penetrate the detection light Line.

In some embodiments, the backlight module further includes reflector plate, is located at below the diffusion sheet, the detection Light is infrared or near infrared light, and the reflector plate is the material system by reflecting visible light through infrared or near infrared light At.

In some embodiments, the detection light is infrared light or near infrared light, and the backlight module is to described aobvious Show that the backlight light that panel provides is visible light.

The application also provides a kind of liquid crystal display device, including display panel and backlight module, and the display panel is used for Show picture, the backlight module is for providing backlight light to the display panel, wherein the backlight module is among the above Backlight module described in any one.

The application also provides a kind of electronic equipment, including any liquid crystal display device among the above and at least partly sets Set the sensing mould group below the liquid crystal display device, display area and back of the sensing mould group through the display panel Optical mode group receives the detection light for reflecting or/and emitting from external object, to execute corresponding sensing.

In some embodiments, the detection light is emitted by the sensing mould group or other light sources to external object.

Due to the backlight module of the application include backlight light is diffused and to detection light transmission diffusion sheet, because This, the backlight module, which does not need aperture, can penetrate the detection light.To which the electronic equipment is when showing picture Brightness is more uniform.

The additional aspect and advantage of the application embodiment will be set forth in part in the description, partially will be from following Become obvious in description, or is recognized by the practice of the application embodiment.

Detailed description of the invention

Fig. 1 is the front schematic view for the electronic equipment that the application first embodiment provides.

Fig. 2 is the partial structure diagram of electronic equipment shown in Fig. 1.

Fig. 3 is the front schematic view for the electronic equipment that the application second embodiment provides.

Fig. 4 is the partial structure diagram of electronic equipment shown in Fig. 3.

Fig. 5 is the structural schematic diagram for the backlight module that the application third embodiment provides.

Fig. 6 is the structural schematic diagram for the backlight module that the 4th embodiment of the application provides.

Fig. 7 is the structural schematic diagram for the optical film layer structure that the 5th embodiment of the application provides.

Fig. 8 is index path when backlight light passes through the first film layer unit shown in fig. 7 with detection light.

Fig. 9 is the correspondence diagram of display pixel point and optical film layer structure 5.

Figure 10 is the first film layer unit shown in Fig. 7 along the cross-sectional view of IX-IX '.

Figure 11 is the structural schematic diagram for the optical film layer structure that the application sixth embodiment provides.

Figure 12 is the structural schematic diagram for the optical film layer structure that the 7th embodiment of the application provides.

Figure 13 is the structural schematic diagram for the optical film layer structure that the 8th embodiment of the application provides.

Figure 14 is the structural schematic diagram for the optical film layer structure that the 9th embodiment of the application provides.

Figure 15 is index path when backlight light passes through the first film layer unit shown in Figure 14 with detection light.

Figure 16 is the first film layer unit shown in Figure 14 along the cross-sectional view of XV-XV '.

Figure 17 is the structural schematic diagram for the optical film layer structure that the tenth embodiment of the application provides.

Figure 18 is the structural schematic diagram for the optical film layer structure that the 11st embodiment of the application provides.

Figure 19 is the structural schematic diagram for the optical film layer structure that the 12nd embodiment of the application provides.

Figure 20 is the structural schematic diagram for the optical film layer structure that the 13rd embodiment of the application provides.

Figure 21 is the structural schematic diagram for the optical film layer structure that the 14th embodiment of the application provides.

Figure 22 is the structural schematic diagram for the optical film layer structure that the 15th embodiment of the application provides.

Specific embodiment

Presently filed embodiment is described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng The embodiment for examining attached drawing description is exemplary, and is only used for explaining the application, and should not be understood as the limitation to the application.? In the description of the present application, it is to be understood that term " first ", " second " are only used for describing, and should not be understood as instruction or dark Show relative importance or implicitly indicates the quantity of indicated technical characteristic or put in order.Define as a result, " first ", The technical characteristic of " second " can explicitly or implicitly include one or more technical characteristic.In retouching for the application In stating, the meaning of " plurality " is two or more, unless otherwise specifically defined.

In the description of the present application, it should be noted that unless otherwise specific regulation or limit, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integration connection；It can To be mechanical connection, it is also possible to be electrically connected or is in communication with each other；It can be directly connected, the indirect phase of intermediary can also be passed through Even, the connection inside two elements or the interaction relationship between two elements be can be.For the ordinary skill of this field For personnel, the concrete meaning of above-mentioned term in this application can be understood as the case may be.

Following disclosure provides many different embodiments or example is used to realize the different structure of the application.In order to Simplify disclosure herein, hereafter only to the component of specific examples and being set for describing.Certainly, they are merely examples, and And purpose does not lie in limitation the application.

In addition, the application can reuse reference number and/or reference letter, this reuse in different examples It is itself not indicated between the various embodiments discussed and/or setting to simplify and clearly state the application Particular kind of relationship.In addition, provided various specific techniques and material are only to realize the application skill to the application in the following description The example of art scheme, but those of ordinary skill in the art should be aware that the technical solution of the application can also be by hereafter not Other techniques and/or other materials of description are realized.

Further, described feature, structure can be incorporated in one or more embodiment party in any suitable manner In formula.In the following description, many details are provided so as to fully understand presently filed embodiment.However, this Field technical staff will be appreciated that even if without one or more in the specific detail, or using other structures, group Member etc. can also practice the technical solution of the application.In other cases, it is not shown in detail or describes known features or operation To avoid the emphasis of fuzzy the application.

Also referring to Fig. 1 and Fig. 2, the application first embodiment provides a kind of electronic equipment 1.The electronic equipment 1 Such as, but not limited to mobile phone, laptop, tablet computer, e-book, personal digital assistant, touch-control interactive terminal Deng.The electronic equipment 1 includes memory 12, processor 14, display device 3 and is at least partially disposed in the display dress Set the sensing mould group 10 at 3 back sides.

The display device 3 includes display panel 30 and the backlight module 4 positioned at 30 lower section of display panel.It is described aobvious Show panel 30 for showing picture.The backlight module 4 is used to provide backlight light for the display panel 30.From the backlight The backlight light that mould group 4 is emitted to the display panel 30 is visible light.The region for defining the display of display device 3 picture is Display area, and the region except display area is non-display area.In the present embodiment, the display panel 30 is, for example, Liquid crystal display panel.So, ground is changed, the display panel 30 can also be the display panel of other suitable types, such as electronics Paper display panel.

The sensing mould group 10 is at least partially disposed at the lower section of the backlight module 4, and display area described in face is arranged. The sensing mould group 10 is used to receive the detection light for being emitted or/and being reflected by external object itself, and is received according to described Detection light realize corresponding sensing.For example, the sensing mould group 10 is received through the display panel 30 and backlight module 4 The detection light.The external object be such as, but not limited to user's finger, user's face or other suitable positions, again or The other suitable objects of person and be not limited to human body etc..

Optionally, the sensing mould group 10 is further used for transmitting detection light to the external object.For example, the biography Sense mould group 10 emits the detection light to external object through the display panel 30 and backlight module 4.

The sensing mould group 10 is such as, but not limited to for executing biological information according to the detection light received Sensing, two-dimentional and/or 3-D image sensing, 3 D stereo modeling, distance sensing etc..Wherein, the biological information sensing For example including but be not limited to finger print information sensing, three dimensional face information sensing, biological information sensing etc..

In the present embodiment, the sensing mould group 10 emits detection light through the display panel 30 and backlight module 4 Line is received through the display panel 30 and backlight module 4 and emits from external object itself or/and reflect to external object Detection light.So, ground is changed, the sensing mould group 10 can also be not through display device 3 or through the display device 3 Subelement transmitting detection light is to external object, and the sensing mould group 10 the transmission display panel 30 and backlight module 4 Receive the detection light for emitting from external object itself or/and reflecting.Alternatively, the sensing mould group 10 penetrates the display surface Plate 30 and the transmitting detection light of backlight module 4 are to external object, and the sensing mould group 10 is not through the display device 3 or saturating The subelement for crossing the display device 3 receives the detection light for emitting from external object itself or/and reflecting.

It should be noted that the structure setting of the sensing mould group 10 is not limited to shown in illustrations, can also be Various other suitable constructions.

The memory 12 is such as, but not limited to the biological information template for prestoring one or more samples.Again For example, the memory 12 is used to store data, the journey relevant to sensing that the sensing mould group 10 generates during the sensing process Sequence implements data required for sensing correlation function.The processor 14 is used to believe the sensing that the sensing mould group 10 obtains Breath performs corresponding processing, and is stored in the biological information and memory 12 that the sensing mould group 10 obtains for example, comparing Biological information template, according to comparison result realize to the external object carry out identification.For another example the processing Device 14 can be used for executing program relevant to sensing.The electronic equipment 1 can according to it is described sensing mould group 10 sensing result or/ It is corresponding with the processing result of the processor 14 to execute relevant function, such as: extinguish screen, removing screen locking, pays, steps on Land account, into next stage menu, open permission etc..

In the present embodiment, the memory 12 and processor 14 are in the electronic equipment 1 independently of sensing mould group The component of 10 settings.So, ground is changed, may alternatively be integrated within institute some or all of in the memory 12 or/and processor 14 It states in sensing mould group 10.

The sensing mould group 10 includes receiving unit 103.The receiving unit 103 is located at the lower section of the backlight module 4, And display area described in face, it is used to receive through the display panel 30 and backlight module 4 by described external object itself Transmitting or/and reflected detection light, and realized according to the detection light received to the corresponding of the external object Sensing.

Optionally, the receiving unit 103 includes camera lens 104 and the imaging sensor positioned at 104 lower section of camera lens 106.The display panel 30 and backlight module are penetrated by described external object transmitting itself or/and reflected detection light It is received by the camera lens 104 by described image sensor 106 after 4.Described image sensor 106 is for example according to the detection light Line obtains the image or associated sensed data of the external object, to realize corresponding sensing.So, in certain embodiments In, the camera lens 104 also can be omitted or be replaced by other elements, such as be replaced by beam collimation element.

In the present embodiment, the sensing mould group 10 further comprises transmitting unit 102.The transmitting unit 102 is set It sets below the backlight module 4.The transmitting unit 102 is through the backlight module 4 and the transmitting inspection of the display panel 30 Light is surveyed to the external object.

Optionally, the transmitting unit 102 includes sensing light source.The detection light that the sensing light source 102 issues penetrates It turns back, is again passed through after display device 3 described in the receiving unit 103 after being reflected by external object after display device 3 It receives, carries out identification such as, but not limited to therefrom to extract the correlated characteristic data of the external object.

According to sensing principle and application scenarios, the detection light has specific wavelength.In the present embodiment, described Detection light can be used for, but be not limited to, and sense the 3-D image of fingerprint or face, can be infrared or near infrared light, Wave-length coverage is 800nm to 1650nm.Ground is changed, in other embodiments, the detection light can also be other suitable Detection signal, such as ultraviolet light, ultrasonic wave, electromagnetic wave etc..

Also referring to Fig. 3 and Fig. 4, the application second embodiment provides a kind of electronic equipment 2, implements with first The structure for the electronic equipment 1 that mode provides is roughly the same, and the two main distinction is: the transmitting unit of the sensing mould group 20 202 the back side of the display device 3 is not arranged in, but the outside of the display area of the display device 3, example is arranged in As but be not limited to be arranged in the other of the side of the display panel 30 or the side of backlight module 4 or electronic equipment 1 Suitable position etc..The detection light that the transmitting unit 202 is issued is not needed through the display device 3 or through display dress It is incident upon in external object after setting 3 subelement, the transmission power for being applicable to require the transmitting unit 202 is arranged such Higher scene, such as, but not limited to: the transmitting unit 202, which needs to project, has the hot spot of predetermined pattern in external object On, to realize the sensing of three-dimensional surface.

In the present embodiment, the top front center position of electronic equipment 2 is arranged in the transmitting unit 202, penetrates Cover sheet (the not indicating) transmitting of electronic equipment 2 detects light beam to external object.The receiving unit 203 of the sensing mould group 20 The lower section of the backlight module 4 is set, for being emitted through the display device 3 reception by external object itself or/and instead The detection light penetrated.

It should be noted that mainly penetrating the display surface in each embodiment of the application with the sensing mould group 10 or 20 Plate 30 and backlight module 4 are received to be illustrated by external object transmitting itself or/and reflected detection light, but the application Not as limitation.Such as sensing mould group 20, the transmitting unit 202 of the either described sensing mould group 20 and reception are single In member 203 any one or both be both placed in 4 lower section of the backlight module, the protection scope of the application should all be fallen into.

Referring to Fig. 5, the application third embodiment provides a kind of backlight module that can be used in above-mentioned display device 3 4.The backlight module 4 can be used for gathering the backlight light being emitted to the display panel 30 and for penetrating the detection light Line provides backlight with satisfaction simultaneously for display panel 30 and wanting for the sensing mould group 10 or 20 is arranged below display device 3 It asks.The backlight module 4 includes back light 40, light guide plate 42, reflector plate 44, diffusion sheet 46 and optical film layer structure 5.

The light guide plate 42 include light-emitting surface 420, the bottom surface 422 opposite with the light-emitting surface 420 and described in connect out Incidence surface 424 between smooth surface 420 and bottom surface 422.The corresponding incidence surface 424 of the back light 40 is arranged, for providing Backlight light is to light guide plate 42.The backlight light projects after mixing in light guide plate 42 from light-emitting surface 420.The reflector plate 44 It is arranged on the bottom surface 422 of light guide plate 42, for will be reflected back in light guide plate 42 from the backlight light that light guide plate 42 releases, to mention The utilization rate of high backlight light.The reflector plate 44 is for example by can pass through the material system for detecting light and reflecting visible light At again the backlight light so as to be located in visible wavelength range is reflected back light guide plate 42, while can penetrate infrared Or the detection light of near-infrared.

420 side of light-emitting surface of light guide plate 42 is arranged in the optical film layer structure 5, for gathering from the light guide plate 42 The backlight light of outgoing, to improve backlight illumination provided by backlight module 4.In the present embodiment, the optical film layer knot Structure 5 includes the first film layer unit 501 and the second film layer unit 502.First film layer unit 501 and second film layer unit 502 structure is such as, but not limited to identical.It is illustrated by taking first film layer unit 501 as an example below.

First film layer unit 501 includes the first optical surface 503 and the second optical surface 504 being oppositely arranged.Institute State the first optical surface 503 back to the light guide plate 42 light-emitting surface 420.Second optical surface 504 faces the leaded light The light-emitting surface 420 of plate 42.The backlight light can be from second optical surface 504 when penetrating first film layer unit 501 It is appeared again from first optical surface 503 after incidence.Existed by external object transmitting itself or/and reflected detection light It can be after 503 incidence of the first optical surface again from second optical surface 504 when through first film layer unit 501 It appears.

First optical surface 503 is a continuous surface, and second optical surface 504 is a continuous surface. Wherein, first optical surface 503 is generally non-planar.

The stacking direction for defining the light guide plate 42, diffusion sheet 46 and optical film layer structure 5 is vertical direction Y.Described One optical surface 503 includes first plane 520 perpendicular with the vertical direction Y, second optical surface 504 include with The second perpendicular plane of the vertical direction.In the present embodiment, second optical surface 504 is whole is a flat surface, Correspondingly, second optical surface 504 is second plane.So, ground is changed, in some embodiments, described the Two optical surfaces 504 also can be used as it is whole is not a flat surface, but other than including the second plane, may also include curved surface or With the inclined-plane etc. of the vertical direction Y out of plumb.

First plane 520 and second plane parallel, by optical refraction principle it is found that when detection light beam passes through When first film layer unit 501, at least there is part detection light beam logical from the first parallel plane 520 and the second plane Later the direction of propagation is constant, position shifts.

In the present embodiment, first optical surface 503 includes multiple spaced first planes 520.It is each First plane 520 is oppositely arranged with second plane respectively.Via opposite first plane and second plane Through first film layer unit 501 at least part detection light the direction of propagation is constant, position shifts.Accordingly Ground, the sensing mould group 10 or the 20 detection light obtained sensitive informations constant according to this part direction of propagation received It is relatively accurate.

It should be noted that when making first film layer unit 501, since there are errors or other works for manufacture craft The adverse effect such as skill factor, causes between the first plane 520 and the second plane of the first film layer unit 501 actually manufactured May be parallel not such as ideal, i.e., the first plane 520 and the second plane are substantially parallel.Correspondingly, via first plane 520 and second plane and penetrate first film layer unit 501 at least part detection light beam the direction of propagation be basically unchanged.

Defining first plane 520 is the first transmittance section, and first optical surface 503 further comprises the second light transmission Portion 522, vertical direction Y described in 522 out of plumb of the second transmittance section.When the backlight for being incident to first film layer unit 501 Light can be assembled when being emitted from second transmittance section 522.

The side of every one first transmittance section 520 has been respectively coupled the second transmittance section 522.It wraps second transmittance section 522 Include inclined-plane or/and vertical plane.In the present embodiment, second transmittance section 522 includes inclined-plane and vertical plane (together referring to Fig. 7). The inclined-plane favours between first transmittance section 520 and second optical surface 504.The vertical plane is perpendicular to described Between one transmittance section 520 and second optical surface 504.Wherein, connection two is described tiltedly between the first adjacent transmittance section 520 Face.Angle between adjacent first transmittance section 520 and the inclined-plane is obtuse angle.Positioned at the first adjacent transmittance section 520 Between two inclined-planes between angle be acute angle.

So, ground is changed, in other embodiments, second transmittance section 522 can also be inclined-plane or vertical plane.

Ground is changed, in some embodiments, in the direction arranged along first transmittance section 520, described first Transmittance section 520 can also be for example alternately present respectively with second transmittance section 522, the first adjacent transmittance section 520 to described The vertical range of two optical surfaces 504 is different, and the folder between second transmittance section 522 and the first adjacent transmittance section 520 Angle is obtuse angle.

The structure of second film layer unit 502 and first film layer unit 501 is same or similar, herein no longer to institute The second film layer unit 502 is stated to be repeated.First film layer unit 501 is located at 502 top of the second film layer unit.It is described Each first transmittance section 520 in first film layer unit 501 for example extends in a first direction.In second film layer unit 502 Each first transmittance section 520 extends in a second direction.The vertical second direction of the first direction.

The area of the second optical surface 504 of first film layer unit 501 is set as S1.Set the first film layer list Member 501 the first transmittance section 520 the gross area (or are as follows: the sum of area) be S2.Set the of second film layer unit 502 The area of two optical surfaces 504 is S3.Set the first transmittance section 520 of second film layer unit 502 the gross area (or Are as follows: the sum of area) it is S4.

Further, the gross area S2 for setting the first transmittance section 520 of first film layer unit 501 accounts for first film The percentage of the area S1 of second optical surface 504 of layer unit 501 is P1.Set the first of second film layer unit 502 The percentage that the gross area S4 of transmittance section 520 accounts for the area S3 of the second optical surface 504 of second film layer unit 502 is P2.The product of the percentage P1 and the percentage P2 are set as N.

Inventor by a large amount of experiment and analysis verifying discovery, when the product N is equal to or more than 50% and be less than or When equal to 100%, the amount of the detection light constant from the direction of propagation that the optical film layer structure 5 is emitted is appropriate, thus, institute It is more accurate to state the sensitive information that sensing mould group 10 is obtained according to the detection light received.

Ground is changed, in some embodiments, the optical film layer structure 5 or single layer diaphragm structure.Accordingly Ground, the gross area of the first transmittance section 520 of the monolithic film layer structure 5 account for the percentage of the area of the second optical surface 504 Such as larger than or it is equal to 50% and is less than or equal to 100%.

The side of the light-emitting surface 420 of the light guide plate 42 is arranged in the diffusion sheet 46, for expanding the backlight light It dissipates to realize atomizing effect.

The diffusion of diffusion sheet 46 is located at the backlight light in visible wavelength range and penetrates infrared or near-infrared inspection Survey light.Such as: the wave-length coverage of the backlight light is, for example, 380nm to 760nm.The wave-length coverage example of the detection light For example 800nm to 1650nm.The diffusion sheet 46 can measure the diffusion of light with mist degree.The mist degree refers to Light retrodeviates the light intensity that the light intensity from 2.5 degree of incident direction or more transmitted rays accounts for original whole incident rays by diffusion sheet 46 Percentage.Through light after the diffusion sheet 46 mist degree it is bigger illustrate that diffusion sheet 46 is stronger to the diffusion of the light, Mist degree is more than 30% and thinks that diffusion sheet 46 has diffusion to the light.

The diffusion sheet 46 is greater than the diffusion to the detection light to the diffusion of the backlight light.It is optional Ground, the diffusion sheet 46 for pass through detection light mist degree less than 30%.

The diffusion sheet 46 can realize the diffusion to light by forming optical scattering structure on substrate.In this reality It applies in mode, the optical scattering structure can be the coarse microstructure of ground-glass appearance.The substrate is translucent material, optional autohemagglutination Carbonic ester (PC), polymethyl methacrylate (PMMA), any one or more in polyethylene terephthalate (PET) Combination or other meet the material of above-mentioned light transmission requirement.The average-size of the coarse microstructure of the ground-glass appearance is 380 In nanometer (Nanometer, nm) to the visible wavelength range of 760nm, so as to the backlight light for belonging to visible-range Line has an obvious diffusion effect and longer infrared to wavelength or detection light of near-infrared has stronger penetrability.

Ground is changed, is applied in mode other, the diffusion sheet 46 can be made by mixing diffusion particle on substrate.Institute Backlight light is stated when across the diffusion sheet 46 constantly the different diffusion particle of refractive index and the substrate of transparent material It passes through, repeatedly refraction, reflection and scattering phenomenon occurs, to achieve the effect that optics is spread.The diffusion particle can be by saturating The material crossed infrared or near infrared light and reflect visible light is made.The size ranges of the diffusion particle are received with being located at 380 The visible wavelength range of rice (Nanometer, nm) to 760nm are identical, so as to the backlight light for belonging to visible-range Line has an obvious diffusion effect and longer infrared to wavelength or detection light of near-infrared has stronger penetrability.

Ground is changed, is applied in mode other, the diffusion sheet 46 is a kind of film layer with nano-porous structure.It is described The material of nanoporous film layer can be, but be not limited to, a kind of polyethylene fabric (Nanoporous Polythylene Textile).The aperture of multiple Nano grade sizes, the size range of the aperture are formed on the polyethylene web material For 100nm to 1000nm, the characteristic of scatter visible light is made it have through infrared or near infrared light and is capable of.

The application is not limited to the diffusion sheet 46 that above embodiment is enumerated, and the diffusion sheet 46 can also be other suitable Structure or/and material.

The diffusion sheet 46 may include upper diffusion sheet 461 and lower diffusion sheet 462.The upper diffusion sheet 461 and lower diffusion sheet 462 have similar structure, are used equally for diffusion backlight light and through by external object transmitting or/and reflected detection Light.The upper diffusion sheet 461 and lower diffusion sheet 462 have respective function and are biased to, such as: upper diffusion sheet 461 is more emphasized pair The atomizing effect of backlight light, and lower diffusion sheet 462 has the transmitance of relatively high backlight light.The upper diffusion sheet 461, putting in order between lower diffusion sheet 462, the first film layer unit 501 and the second film layer unit 502 is not particularly limited.Example Such as, in the present embodiment, first film layer unit 501 and the setting of the second film layer unit 502 are in upper diffusion sheet 461 and lower expansion Between discrete piece 462.So, ground is changed, in some embodiments, the upper diffusion sheet 461 is arranged in the first film layer unit 501 Between the second film layer unit 502.The lower diffusion sheet 462 is arranged between the second film layer unit 502 and light guide plate 42.

Referring to Fig. 6, the 4th embodiment of the application provides a kind of backlight module that can be used in above-mentioned display device 3 4 ', it is applied in the display device 3 for replacing above-mentioned backlight module 4.The backlight module 4 ' and the backlight module 4 Structure is roughly the same, and the two main distinction is: the diffusion sheet 46 of the backlight module 4 is replaced by quantum dot film.The amount Son point film 46 is greater than the diffusion to infrared light or near infrared light to the diffusion of backlight light.

Contain quanta point material 463 in the quantum dot film 46.The quanta point material 463 can absorb Blue backlight light It is respectively converted into green colored backlights light and red backlight light, therefore, the back light 40 only needs for blue-light-emitting Light source, the Blue backlight light issued a part in the quantum dot film 46 are turned after the absorption of quanta point material 463 It is changed to green colored backlights light and red backlight light, then is mutually mixed into the unabsorbed part Blue backlight light white Color backlight light projects.Because the quanta point material 463 launches outward the light after conversion when conversion shines centered on itself Line, while also there is dispersion effect, so the white backlight light that the quantum dot film 46 is converted into also has preferable diffusion Property.The quanta point material do not absorb the infrared or near infrared light of infrared or near-infrared wavelength range light or absorption compared with It is few, therefore the detection light can be penetrated.

Change ground, in other embodiments, the back light 40 can also emitting ultraviolet light to light guide plate 42, from institute State light guide plate 42 outgoing ultraviolet light enter the quantum dot film 46, the quantum dot film 46 convert the ultraviolet light into feux rouges, Green light and blue light simultaneously project the visible light beam after conversion.

Inventor has found by a large amount of experimental analysis and verifying, when using the quantum dot film 46 as diffusion sheet, It does not need to be arranged two panels diffusion sheet up and down, and smaller to the diffusion of the detection light beam, therefore, the sensing mould group 10 It is more acurrate according to the detection light beam received corresponding sense data obtained.

It should be noted that the application is not limited to the backlight module that the respective embodiments described above are mentioned, the backlight module Structure or material etc. can also have other suitable deformations, the application emphasis of the application essentially consists in optical film layer structure 5 Structure or material change and/or the change of the structure of diffusion sheet 46 or material, therefore, as long as the application of technical idea and the application The similar or identical all technical solutions of emphasis should all fall into the protection scope of the application.

Also referring to Fig. 5 and Fig. 7, the 5th embodiment of the application provides a kind of optical film layer structure 5, can be used in In the backlight module of above-mentioned each embodiment with biplate optical film layer unit.The optical film layer structure 5 is for gathering back Light light and at least exist when through the detection light part detection light the direction of propagation is constant, position occur it is inclined It moves, is carried out with meeting to increase the display brightness of display device 3 and sense mould group 10 or 20 in the setting of the lower section of display device 3 simultaneously The demand of sensing.

The optical film layer structure 5 includes the first film layer unit 501 and the second film layer unit 502.The first film layer list Member 501 is such as, but not limited to identical with the structure of second film layer unit 502, is now with the first film layer unit 501 Example is illustrated.In the present embodiment, first film layer unit 501 includes substrate 500 and multiple micro-structures 52.The base Bottom 500 includes upper surface and the lower surface being oppositely arranged with upper surface.The multiple micro-structure 52 is closely arranged in the substrate On 500 upper surface.The multiple micro-structure 52 carries out the detection light saturating for assembling to the backlight light It crosses, at least part detects light and sends out in the constant, position by the direction of propagation after the micro-structure 52 and the substrate 500 Raw offset.

In the present embodiment, the micro-structure 52 in first film layer unit 501 is arranged in uniline multiple row, each micro-structure 52 extend in a first direction, arrange in a second direction, wherein the first direction is column direction, and the second direction is row side To.Micro-structure 52 in second film layer unit 502 is arranged in single-row multirow, wherein each micro-structure 52 is along the second party It arranges to extension, along the first direction.The first direction is vertical with the second direction.

In the present embodiment, the substrate 500 is made respectively with the micro-structure 52, and is made respectively by different materials At.For example, the optional self-polycarbonate of material (PC) of the substrate 500, polymethyl methacrylate (PMMA), poly- terephthaldehyde The combination of any one or more in sour glycol ester (PET), or meet the other materials of above-mentioned light transmission requirement.It is described micro- Structure 52 is for example made of curable material.When production, curable material, such as UV first are coated in the substrate 500 Glue the curable materials is made using moulding process the specific shape of micro-structure 52, finally again to the micro-structure 52 into Row solidification.

Optionally, the absolute value of the refractive index difference between the substrate 500 and the micro-structure 52 is less than 0.3.It is described The refractive index of micro-structure 52 is, for example, 1.45~1.55, and the refractive index of the substrate 500 is, for example, 1.6~1.8.

Preferably, the absolute value of the refractive index difference between the substrate 500 and the micro-structure 52 is less than 0.2.It is described The refractive index of micro-structure 52 is less than the refractive index of the substrate 500.The refractive index of the micro-structure 52 is, for example, 1.45~1.55, The refractive index of the substrate 500 is, for example, 1.64.

Inventor is analyzed by many experiments and the discoveries such as verifying, the refractive index between the substrate 500 and micro-structure 52 The absolute value of difference is smaller, is more conducive to the sensing precision for promoting sensing mould group 10.On the one hand, due to the substrate 500 with it is micro- The absolute value of refractive index difference between structure 52 is smaller, therefore, the detection light phase being emitted from first film layer unit 501 The direction of detection light when compared with incidence deflects smaller or zero deflection, correspondingly, receives according to through the backlight module 4 The detection light, the sensing mould group 10 can restore the truth of wanted sensitive information to large extent；On the other hand, Since the absolute value of the refractive index difference between the substrate 500 and micro-structure 52 is smaller, first film layer unit 501 is transmitted Detection light it is more, the detection light of reflection tails off, so as to improve detection light light transmittance, in turn, the sensing The detection light that mould group 10 obtains increases, and further increases sensing precision.

However, since the material that different manufacturers use is different, the refractive index difference meeting of the substrate 500 and micro-structure 52 Difference is respectively corresponded, correspondingly, the absolute value of refractive index difference between the two also may be selected to be greater than 0.3, but the sensing The sensing precision of mould group 10 is corresponding to be reduced.

Each micro-structure 52 includes upper surface (or: top surface), and the upper surface of the micro-structure 52 is the micro-structure 52 Back to a side surface of the substrate 500.In the present embodiment, the upper surface of the micro-structure 52 is integrally a flat surface.Institute Upper surface and the vertical direction Y for stating micro-structure 52 are perpendicular.

The upper surface and lower surface of the substrate 500 are the plane being parallel to each other, and perpendicular with the vertical direction Y. Correspondingly, second optical surface 504 is the lower surface of the substrate 500.First light transmission of first optical surface 503 Portion 520 is the upper surface of the micro-structure 52.

It is illustrated by taking first film layer unit 501 as an example, each micro-structure 52 further includes two first sides 523 and two Second side 524, wherein the first side 523 is side that is opposite with the first direction or intersecting, the second side 524 is along the sides that the first direction extends.In the present embodiment, the second side 524 is inclined-plane, first side Face 523 is vertical plane.Second transmittance section 522 includes the second side 524 and the first side 523.

Along the arragement direction of the micro-structure 52, there are second side that two are connected between the first adjacent transmittance section 520 Face 524.Angle between the first adjacent transmittance section 520 and second side 524 is obtuse angle.Positioned at the first adjacent transmittance section The angle between two second sides 524 between 520 is acute angle.

Optionally, the micro-structure 52 is such as, but not limited to halfpace.

In the present embodiment, the vertical range of each first transmittance section, 520 to the second optical surface 504 is identical.So, it can be changed More, in some embodiments, 520 to the second optical surface 504 of the first transmittance section of the multiple micro-structure 52 is vertical Distance can also be different.

Emitted when the sensing mould group 10 or 20, which executes, to be sensed by external object itself please also refer to Fig. 2 or Fig. 4 Or/and there is at least partly detection light via first when being transmitted to first film layer unit 501 in the detection light of reflection Transmittance section 520 is penetrated through the second optical surface 504 of first film layer unit 501 and via the first transmittance section 520 After second optical surface 504 of second film layer unit 502, the direction of propagation is basically unchanged, and position shifts, to make It is more accurate to obtain the receiving unit 103 or 203 associated sensed data or information obtained about the external object.

Optical path reversibly, when it is described sensing mould group 10 emit detection light beam optical film layer structure 5 described in light transmission after, until Few direction of propagation that there is part detection light beam is constant, and position shifts.

So, compared to through the display device 3 transmitting detection light beam to external object, the sensing mould group 10 penetrates institute It states display device 3 and receives the detection light beam for being emitted by described external object itself or/and being reflected, passed through with greater need for detection light beam The direction of propagation when optical film layer structure 5 is constant, it is hereby achieved that accurate sensing result.

Further, the backlight light is passing through the second transmittance section 522 of second film layer unit 502 and the first film It can be assembled when the second transmittance section 522 of layer unit 501, to improve the brightness of backlight light.

In the present embodiment, the product N is greater than or equal to 50% and less than 100%.

Also referring to Fig. 8, because the first transmittance section 520 of first optical surface 503 and the second optical surface 504 it Between distance generally remain constant, i.e., substantially parallel relationship is kept between each other, according to light refraction law: via institute The direction of propagation that the first transmittance section 520 is stated through at least part detection light of second optical surface 504 is basically unchanged, And offset D has occurred in position.It is clear in order to understand, for example, name is from the incident detection light in first transmittance section 520 O1, the detection light O1 are emitted after repeatedly reflecting from the second optical surface 504 in the first film layer unit 501, name Going out this detection light shot out from second optical surface 504 is O2.By light refraction law it is found that detection light O2 Positional shift D mainly has occurred compared to detection light O1, and transmission direction is constant.

It is understood that Fig. 8 is schematic diagram.When the refractive index difference of micro-structure 52 and the material of substrate 500, Fig. 8 In be not specifically shown the refraction effect that detection light occurs when the interface of micro-structure 52 and substrate 500 transmits.

Reversibly, it when detection light is transmitted from second optical surface 504 to first optical surface 503, deposits At least partly detection light is after passing through first transmittance section 520, transmission direction is constant, position shifts.For example, When transmitting unit 102 (see Fig. 2) is located at below backlight module, the detection light of transmitting is passing through the optical film layer structure 5 When, at least there is transmission of the part detection light before passing through the optical film layer structure and after the optical film layer structure Direction is basically unchanged, position shifts.

It is understood that because of production tolerance or the relationship of machining accuracy, the first light transmission of first optical surface 503 Parallel relation between portion 520 and second optical surface 504 may exist reasonable deviation range.

Due between the second transmittance section 522 and second optical surface 504 of first optical surface 503 and uneven Row, according to the law of refraction of light, via second transmittance section 522 through the light of the optical film layer structure 5 can occur compared with Apparent direction deflection, so as to for gathering backlight light along preset direction to improve backlight illumination.

Ground is changed, in some embodiments, the micro-structure 52 can be structure as a whole with substrate 500, the two Material is identical or different.In addition, the material of the two can also be identical when the micro-structure 52 is made respectively with the substrate.

In some embodiments, the micro-structure 52 can also be with substrate 500 by together with adhesives Two independent film layers.Described adhesive may include, but be not limited to, contact adhesive or uv-curable adhesive.

It is referring to Figure 2 together that a pixel R of display panel 30 is corresponding with optical film layer structure 5 with Fig. 9, Fig. 9 to close It is schematic diagram.The display panel 30 includes multiple pixels, and the multiple pixel for example but not limits to including multiple red (R) pixel, multiple green (G) pixels and multiple blue (B) pixels are the multiple red (R) pixel, multiple green Color (G) pixel and multiple blue (B) pixels are arranged according to pre-defined rule.In general, the size of each pixel is identical, Such as the square that long wide scope is 30 microns to 50 microns.It is illustrated by taking red (R) pixel as an example now.

By optical principle it is found that through second transmittance section 522 backlight light than penetrate first transmittance section 520 backlight light will be assembled, and correspondingly, the brightness through the backlight light of second transmittance section 522 can be than described in transmission The brightness of the backlight light of first transmittance section 520 is eager to excel.

The first transmittance section 520 and the second film layer list in order to succinct clear, in definition first film layer unit 501 Overlapping region of first transmittance section 520 when the opposite direction along the vertical direction Y is projected in member 502 is M.It is described heavy Folded region M is also square.

Preferably, the area or width of the overlapping region M are less than the area or width of the pixel R, thus, it penetrates The backlight light of first transmittance section 520 and the backlight light for penetrating second transmittance section 522 can be irradiated to described Pixel R.So set, the backlight light of each pixel on the display panel 30 is more uniform.

It is understood that in some embodiments, red (R) pixel of the display panel 30, green (G) as The size of vegetarian refreshments and blue (B) pixel can also be not fully identical.In addition, each pixel or each overlapping region M for example may be used For rectangle, and it is not limited to square.Preferably, the area of the overlapping region M is less than the area of the pixel.

So, ground is changed, the overlapping region M can also be not fully be overlapped with the pixel.Or when described heavy When folded region M and the pixel are completely overlapped, the area of the overlapping region M is less than the area of the pixel.

Referring to Fig. 10, being illustrated so that the micro-structure 52 is halfpace as an example, along the vertical direction Y and along micro-structure Arragement direction between 52, the cross section of first film layer unit 501 are trapezoidal.Preferably, described trapezoidal for isosceles trapezoid, institute The base angle θ range for stating isosceles trapezoid is 40 degree to 50 degree, and the range of the width K of the first transmittance section 520 is more than or equal to 5 microns And the range less than 50 microns, height H is 10 microns to 25 microns.

Inventor verifies with analysis through a large number of experiments, and discovery passes through when detection light with the micro- of above-mentioned size range The amount for the detection light that after the optical film layer structure 5 of structure 52, the direction of propagation is constant, position shifts is appropriate, is conducive to It senses mould group 10 or 20 and executes corresponding sensing.In addition, converging action pair of the backlight light after the optical film layer structure 5 Display effect is also relatively suitable.

It should be noted that angle of the base angle θ of the isosceles trapezoid between second side 524 and the second plane.Institute Stating base angle θ is preferably 45 degree.

So, ground is changed, in some embodiments, according to client to the integration requirement of backlight effect and detection effect, Furthermore, it is contemplated that the difference of the size of product, material etc., is guaranteeing the product more than or equal to 50% and is being less than Under conditions of 100%, manufacturer can be further combined with parameters such as width, height H, the base angle θ for adjusting the micro-structure 52, to meet Different demands of the different clients to product.

Figure 11 is please referred to, the application sixth embodiment provides a kind of optical film layer structure 5 ', replaceable above-mentioned light It learns film layer structure 5 and is used in the backlight module of above-mentioned each embodiment with biplate optical film layer unit.The light Film layer structure 5 ' is roughly the same with the structure of the optical film layer structure 5, and the main distinction of the two is: the optical film layer One layer of light diffusion layer for diffusing light is provided on second optical surface 504 of the first film layer unit 501 of structure 5 ' 505.The light diffusion layer 505 is the coarse lines of one layer of ground-glass appearance to spread incident backlight light.It is understood that The light diffusion layer 505 can be formed directly on the second optical surface 504, or be laid on second optical surface 504 The coating is shaped to the coarse lines of ground-glass appearance by one coating again.The material of the light diffusion layer 505 can be with described The substrate 500 of one film layer unit 501 is different, for the material that can reflect visible light through infrared or near infrared light.It is described thick Rough lines, for example, can be multiple small protrusions.The average-size of the small protrusion can be at 380 nanometers (Nanometer, nm) To the visible wavelength range of 760nm, so as to have obvious dispersion effect to visible light and longer red to wavelength Outer or near-infrared detection light has stronger penetrability.

It should be noted that when optical film layer structure 5 ' is applied to above-mentioned backlight module 4, upper diffusion sheet 461 or lower expansion One of discrete piece 462 can be omitted.In addition, the diffusion layer 505 is also alternatively formed in second film layer unit On 502 the second optical surface 504.

Figure 12 is please referred to, the 7th embodiment of the application provides a kind of optical film layer structure 5 ", replaceable above-mentioned light It learns film layer structure 5 and is used in the backlight module of above-mentioned each embodiment with biplate optical film layer unit.The light Film layer structure 5 " is roughly the same with the structure of the optical film layer structure 5 ', and the main distinction of the two is: the optical film The light diffusion layer 505 of layer structure 5 " includes flat part 506.The flat part 506 has back to the side of the second optical surface 504 There is flat surface, thus, when being pierced by by external object transmitting itself or/reflected detection light from the flat part 506 When, the scattering to the detection light can be reduced.Correspondingly, positioned at the sensing mould group 10 or 20 bases of 3 lower section of display device The detection light sensitive information obtained received is closer to real information.

Figure 13 is please referred to, the 8th embodiment of the application provides a kind of optical film layer structure 5 " ', replaceable above-mentioned light It learns film layer structure 5 and is used in the backlight module of above-mentioned each embodiment with biplate optical film layer unit.The light Learn film layer structure 5 " ' it is roughly the same with the structure of the optical film layer structure 5 ', the main distinction of the two is: the optical film Layer structure 5 " ' light diffusion layer 505 be the coating being formed on the second optical surface 504, and be mixed in the coating more A diffusion particle 507 for diffusing light.It is understood that the diffusion particle 507 can be infrared or close by can pass through Infrared light and the material for reflecting visible light is made.The size ranges of the diffusion particle 507 be located at 380 nanometers (Nanometer, nm) is identical to the visible wavelength range between 760nm, so as to have obvious scattering to visible light Effect and it is longer infrared to wavelength or detection light of near-infrared has stronger penetrability.

Also referring to Figure 14 and Figure 15, the 9th embodiment of the application provides a kind of optical film layer structure 5 " ", it can It replaces above-mentioned optical film layer structure 5 and is used in the backlight module of above-mentioned each embodiment with biplate optical film layer unit In.The optical film layer structure 5 " " is roughly the same with the structure of the optical film layer structure 5, and the main distinction of the two is: institute State optical film layer structure 5 " " micro-structure 52 be intervally arranged in the substrate 500.

Due to be not formed on the upper surface of the substrate 500 micro-structure 52 part be flat surface, and with institute It is parallel to state the second plane, therefore, the part that the micro-structure 52 is not formed on the upper surface of the substrate 500 is also described First plane of one optical film layer unit 501, i.e. the first transmittance section 520.At least there is part detection light and is passing through the base The transmission direction behind the first transmittance section 520 and the second optical surface 504 on bottom 500 is constant, position shifts.

One second transmittance section 522, and second transmittance section 520 and phase are connected between the first adjacent transmittance section 520 Angle between the first adjacent transmittance section 520 is obtuse angle.Relatively, adjacent second transmittance section of the optical film layer structure 5 2 second transmittance sections 522 are connected between 520.Therefore, second between the first transmittance section 520 adjacent in present embodiment is saturating The region in light portion 522 is opposite to become smaller, thus, the detection light is penetrating the optical film layer structure 5 " " when uniformity want It is got well when the transmission optical film layer structure 5.Correspondingly, the sensing data that the sensing mould group 10 or 20 obtains are preferable.

It is similar with the structure of the optical film layer structure 5 referring again to Fig. 9, preferably, the optical film layer structure 5 " " The first transmittance section 520 overlapping region M area or width be less than the pixel R area or width, thus, through institute It states the backlight light of the first transmittance section 520 and can be irradiated to the picture through the backlight light of second transmittance section 522 Vegetarian refreshments R.So set, the backlight light of each pixel on the display panel 30 is more uniform.

It is understood that in some embodiments, red (R) pixel of the display panel 30, green (G) as The size of vegetarian refreshments and blue (B) pixel can also be not fully identical.In addition, each pixel or each overlapping region M for example may be used For rectangle, and it is not limited to square.Preferably, the area of the overlapping region M is less than the area of the pixel.

So, ground is changed, the overlapping region M can also be not fully be overlapped with the pixel.Or when described heavy When folded region M and the pixel are completely overlapped, the area of the overlapping region M is less than the area of the pixel.

Figure 16 is please referred to, is illustrated so that the micro-structure 52 is halfpace as an example, along the vertical direction Y and along described the Two directions, the cross section of first film layer unit 501 are trapezoidal.Preferably, along the arragement direction of each micro-structure 52, it is each adjacent Spacing G between micro-structure 52 is equal, and the spacing G is less than the width K of the first transmittance section 520 in micro-structure 52 and is greater than Or a quarter equal to the width K.To enough in the quantity for ensuring the micro-structure 52 in the first film layer unit 501 In the case of, also ensure that the uniformity of detection light and backlight light is preferable.

Further, it is described it is trapezoidal be isosceles trapezoid, the base angle θ range of the isosceles trapezoid is 40 degree to 50 degree, highly Range is 10 microns to 25 microns, and the range of width K is more than or equal to 5 microns and less than 50 microns.

Inventor verifies with analysis through a large number of experiments, and discovery passes through the with above-mentioned size range when detection light The amount for the detection light that after one film layer unit 501, the direction of propagation is constant, position shifts is appropriate, is conducive to sense mould group 10 or 20 execute corresponding sensing.In addition, converging action of the backlight light after the optical film layer structure 5 is to display effect Also relatively suitable.

So, ground is changed, in some embodiments, according to client to the integration requirement of backlight effect and detection effect, Furthermore, it is contemplated that the difference of the size of product, material etc., is guaranteeing the product more than or equal to 50% and is being less than The 100% and spacing G is less than the width K and is greater than or equal under conditions of a quarter of the width, and manufacturer can be into One step is in conjunction with parameters such as the width K, height H, base angle θ adjusted between the micro-structure 52, to meet different clients to product Different demands.

Certainly, ground is changed, the spacing G between each adjacent micro-structure 52 can be different or non-fully identical.

Ground is changed, the spacing G is less than the width K of the first transmittance section 520 in micro-structure 52 and is greater than or equal to institute State the half of width K.

Figure 17 is please referred to, the tenth embodiment of the application provides a kind of optical film layer structure 6, replaceable above-mentioned optics Film layer structure 5 and be used in the backlight module of above-mentioned each embodiment with biplate optical film layer unit.The optics The structure of film layer structure 6 and the optical film layer structure 5 " " is roughly the same, and the main distinction of the two is: the optical film layer Second transmittance section 622 of the micro-structure 62 of structure 6 is vertical plane, perpendicular to the first transmittance section 620 and the second optical surface 604 it Between.

In the present embodiment, the micro-structure 62 is cuboid.

The product N is equal to 100%.

Figure 18 is please referred to, the 11st embodiment of the application provides a kind of optical film layer structure 7, replaceable above-mentioned light It learns film layer structure 5 and is used in the backlight module of above-mentioned each embodiment with biplate optical film layer unit.The light Film layer structure 7 is roughly the same with the structure of the optical film layer structure 6, and the main distinction of the two is: the optical film layer The micro-structure 72 of structure 7 is the triangular prism of strip.In first film layer unit 701 and second film layer unit 702 The all spaced-apart relations of micro-structure 72.

Figure 19 is please referred to, the 12nd embodiment of the application provides a kind of optical film layer structure 8, the replaceable light It learns film layer structure 5 and is used in the backlight module of the respective embodiments described above.The optical film layer structure 8 is monolithic film layer list Member, roughly the same with the first film layer unit 501 of the optical film layer structure 5, the main distinction of the two is: the optics The micro-structure 82 of film layer structure 8 is in the array arrangement of multiple lines and multiple rows in substrate 800.

In the present embodiment, the micro-structure 82 is halfpace.

In addition, the area for setting the second optical surface 804 of the optical film layer structure 8 sets the optical film as S1 The gross area (or: the sum of area) of first transmittance section 820 of layer structure 8 is S2；Set the first of the optical film layer structure 8 The percentage that the gross area S2 of transmittance section 820 accounts for the area S1 of the second optical surface 804 of the optical film layer structure 8 is P, institute Percentage P is stated more than or equal to 50% and less than 100%.

Figure 20 is please referred to, the 13rd embodiment of the application provides a kind of optical film that can be used in above-mentioned backlight module Layer structure 8 ', roughly the same with optical film layer structure 8, the two main distinction is: micro- knot of the optical film layer structure 8 ' Structure is intervally arranged in substrate 800.

The first transmittance section 820 in the substrate 800 is saturating less than first in the micro-structure 82 along the width of column direction Light portion 820 along column direction width and be greater than or equal to the micro-structure 82 on the first transmittance section 820 along column direction width A quarter；The first transmittance section 820 in the substrate 800 is less than first in the micro-structure 82 along the width of line direction Transmittance section 820 along line direction width and be greater than or equal to the micro-structure 82 on the first transmittance section 820 along line direction width The a quarter of degree.

Figure 21 is please referred to, the 14th embodiment of the application provides a kind of optical film that can be used in above-mentioned backlight module Layer structure 9, roughly the same with optical film layer structure 8 ', the two main distinction is: the micro-structure of the optical film layer structure 9 The second transmittance section 922 be vertical plane.

In the present embodiment, each described micro-structure 82 is cuboid.

The percentage P is equal to 100%

Figure 22 is please referred to, the 15th embodiment of the application provides a kind of optical film that can be used in above-mentioned backlight module Layer structure 9 ', roughly the same with optical film layer structure 8 ', the two main distinction is: micro- knot of the optical film layer structure 9 ' Structure is triangular prism.

The application is not limited to the shape of micro-structure described in above each embodiment, and the micro-structure can also be other The structure of suitable shape.

Change ground, for the micro-structure of the respective embodiments described above, can also part micro-structure closely arrange, part micro-structure It is intervally arranged.

Compared with prior art, optical film layer structure, backlight module, display device provided by each embodiment of the application And electronic equipment can be realized by the way that reasonable microstructure aspects are arranged under the premise of the display area not aperture of display device Backlight light and detection the two-way of light penetrate, and are conducive to sense under realization screen under the premise of not influencing display effect, thus The screen accounting for further increasing electronic equipment, promotes the visual experience of electronic equipment.

It should be noted that it will be understood by those skilled in the art that without creative efforts, the application Some or all of embodiment, and the deformation for some or all of embodiment, replacement, change, fractionation, combination, extension Cover Deng being considered as creating thought by the application of the application, belongs to the protection scope of the application.

In the description of this specification, reference term " embodiment ", " certain embodiments ", " schematically implementation What the description of mode ", " example ", " specific example " or " some examples " etc. meant to describe in conjunction with the embodiment or example Particular features, structures, materials, or characteristics are contained at least one embodiment or example of the application.In this specification In, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific spy of description Sign, structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.

The foregoing is merely the better embodiments of the application, all the application's not to limit the application Made any modifications, equivalent replacements, and improvements etc., should be included within the scope of protection of this application within spirit and principle.

Claims (13)

1. a kind of backlight module, described for sensing mould group through the detection light beam for being emitted by external object and/or being reflected to one The biological information that light beam is detected for external object detects, and the backlight module can provide backlight to a display panel Light, it is characterised in that: the backlight module includes can be through the detection light and the expansion being diffused to backlight light Discrete piece.

2. backlight module as described in claim 1, it is characterised in that: diffusion of the diffusion sheet to the detection light Less than the diffusion to the backlight light.

3. backlight module as described in claim 1, it is characterised in that: the diffusion sheet is small for the mist degree of the detection light In 30%.

4. backlight module as described in claim 1, it is characterised in that: the diffusion sheet includes substrate and is formed in the substrate On optical scattering structure, wherein the optical scattering structure is the coarse microstructure of ground-glass appearance or the expansion to mix on substrate Shot；Or, the diffusion sheet is nano-porous films；Or, the diffusion sheet is quantum dot film.

5. backlight module as claimed in claim 4, it is characterised in that: when the diffusion sheet is nano-porous films, the expansion The material of discrete piece is polyethylene fabric, and the aperture of multiple Nano grade sizes is formed on the polyethylene web material.

6. backlight module as claimed in claim 4, it is characterised in that: when the diffusion sheet is nano-porous films, the expansion With the aperture of multiple Nano grade sizes in discrete piece, the size range of the aperture is 100 nanometers to 1000 nanometers.

7. backlight module as claimed in claim 6, it is characterised in that: the aperture have through infrared or near infrared light and It is capable of the characteristic of scatter visible light.

8. backlight module as claimed in claim 4, it is characterised in that: the detection light is infrared or near infrared light, institute The wavelength for stating detection light is different from the backlight light, and when the diffusion sheet is quantum dot film, the quantum dot film includes Multiple quantum dots, the multiple quantum dot convert the backlight light received into other backlight light of preset wavelength, after conversion The backlight light of preset wavelength dissipated centered on quantum dot, the quantum dot does not absorb infrared or near-infrared wavelength light To penetrate the detection light.

9. such as backlight module of any of claims 1-8, it is characterised in that: the backlight module further includes reflection Piece is located at below the diffusion sheet, and the detection light is infrared or near infrared light, the reflector plate be by penetrate it is infrared or Near infrared light and the material for reflecting visible light is made.

10. backlight module as described in claim 1, it is characterised in that: the detection light is infrared light or near infrared light, institute It is visible light that backlight module, which is stated, to the backlight light that the display panel provides.

11. a kind of liquid crystal display device, it is characterised in that: including display panel and backlight module, the display panel is for showing Show picture, the backlight module is for providing backlight light to the display panel, wherein the backlight module is aforesaid right It is required that backlight module described in any one of 1-10.

12. a kind of electronic equipment, it is characterised in that: including liquid crystal display device described in the claims 11 and at least partly Sensing mould group below the liquid crystal display device is set, the sensing mould group through the display panel display area and Backlight module receives the detection light for reflecting or/and emitting from external object, to execute corresponding sensing.

13. electronic equipment as claimed in claim 12, it is characterised in that: the detection light is by the sensing mould group or other Light source emits to external object.