CN208848215U - Image-taking device - Google Patents
Image-taking device Download PDFInfo
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- CN208848215U CN208848215U CN201821701336.0U CN201821701336U CN208848215U CN 208848215 U CN208848215 U CN 208848215U CN 201821701336 U CN201821701336 U CN 201821701336U CN 208848215 U CN208848215 U CN 208848215U
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Abstract
The utility model discloses a kind of image-taking device, and image-taking device includes euphotic cover plate, display panel, light guide, light-emitting component and image capture element.Euphotic cover plate has the surface contacted with surrounding medium, and surface has a viewing area.Display panel corresponds to viewing area and is set to below euphotic cover plate.Light guide is set between display panel and euphotic cover plate.Light guide is divided into the first smooth conducting part, the second smooth conducting part and light penetration portion, and viewing area and light penetration portion are be overlapped in vertical direction, and the first smooth conducting part and the second smooth conducting part are located at two opposite sides of light penetration portion.Light-emitting component is set to the wherein side of light guide, and to generate the sensing light beam for entering the first smooth conducting part.Sensing light beam is passed to light penetration portion in the first smooth conducting part, and to project the viewing area of euphotic cover plate, and a part for sensing light beam is totally reflected by surface, to form the signal beams for entering the second smooth conducting part by light penetration portion.Image capture element is set to the other side of light guide, to receive the signal beams being passed in the second smooth conducting part.
Description
Technical field
The utility model relates to a kind of electronic devices, more particularly to image-taking device under a kind of screen.
Background technique
Existing optical biologic device for identifying can be applied to detect and recognize face, sound, iris, retina or refer to
Line.By taking fingeprint distinguisher as an example, fingeprint distinguisher has been applied to electronic product at present, and (such as: smartphone is flat
Plate computer etc.) in, to be used to recognize the identity of user.
In existing electronic product, usually using light beam caused by display panel, as identification of fingerprint
Sense light source.Display panel above-mentioned is, for example, organic LED display panel.It is applied in electronic product existing
In fingeprint distinguisher, when user presses light-transmitting plate on the outermost side with finger, light beam caused by display panel is thrown
Be mapped to after light-transmitting plate, the interface (that is, outer surface of light-transmitting plate) of light-transmitting plate and surrounding medium generate total reflection and then
It is received by image sensor.
It is convex when finger is placed on transmission element by user since finger has a plurality of irregular burr and dimpled grain
Line can contact transmission element, but dimpled grain will not contact transmission element.Therefore, the burr meeting broken beam of transmission element is contacted in transmission element
Total reflection, and then will not influence the total reflection of light beam not in contact with the dimpled grain of transmission element, so that image sensor be made to capture
Fingerprint pattern has the dark line of corresponding burr and the bright rays of corresponding dimpled grain.Then, image biography is handled by image processor
The fingerprint pattern that sensor is captured can further determine the identity of user.
However, when existing fingeprint distinguisher and Thin Film Transistor-LCD are integrated, due to thin film transistor (TFT)
Light beam caused by the backlight module of liquid crystal display is just projected light-transmitting plate after diffusion sheet diffusion.Therefore, refer in acquisition
Schlieren as when, the light beam for projecting light-transmitting plate can be uneven, cause acquired fingermark image more fuzzy, influence the essence of identification
True property.
In addition one illuminating part can be also set in the prior art, to generate the light beam for being used to recognize fingerprint.Illuminating part is produced
Raw light beam enters after transmission element, by multiple total reflection in transmission element.When user presses with finger the appearance of transmission element
When face, image sensor fechtable to fingerprint pattern.
However, the outer surface of transmission element is easy to be adhered to by pollutants such as particle or dusts, and broken beam is in transmission element
Interior total reflection.Therefore, before the position that light beam is passed to that finger is pressed, a part of light beam, Jin Erying will be lost
Ring the capture quality of image sensor.
Utility model content
The technical problem to be solved by the utility model is to, a kind of image-taking device is provided in view of the deficiencies of the prior art,
It can be to avoid because the outer surface of transmission element influences image quality because of attachment the problem of.
In order to solve the above technical problems, wherein a technical solution is to provide one kind and takes used by the utility model
As device comprising: an euphotic cover plate, a display panel, a light guide, a light-emitting component and an image capture element.Thoroughly
Light cover board has the surface contacted with surrounding medium, and surface has a viewing area.Display panel corresponds to viewing area and sets
It is placed in below euphotic cover plate.Light guide is set between display panel and euphotic cover plate.Light guide is divided into the conduction of the first light
Portion, the second smooth conducting part and light penetration portion, viewing area is be overlapped in a vertical direction with light penetration portion, and the first smooth conducting part
Two opposite sides of light penetration portion are located at the second smooth conducting part.Light-emitting component is set to the wherein side of light guide, is used in combination
To generate the sensing light beam for entering the first smooth conducting part.Sensing light beam is passed to light penetration portion in the first smooth conducting part,
To project the viewing area of euphotic cover plate, and a part for sensing light beam is totally reflected by surface, is entered with being formed by light penetration portion
One signal beams of the second smooth conducting part.Image capture element is set to the other side of light guide, is conducted with receiving in the second light
The signal beams being passed in portion.
An other technical solution used by the utility model is to provide a kind of image-taking device comprising: an euphotic cover
Plate, a display panel, one first reflecting layer, one second reflecting layer, a light-emitting component and an image capture element.Euphotic cover plate
With the surface contacted with surrounding medium, and surface has a viewing area.Display panel is set to below euphotic cover plate, and right
It should be in viewing area.Display panel includes at least a first substrate and the second substrate in conjunction with first substrate, first substrate
With towards a upper surface of euphotic cover plate and a lower surface opposite to the upper surface.First reflecting layer is set to upper surface,
And there is an opening.Second reflecting layer is set to lower surface, and the first reflecting layer and the second reflecting layer are in the one thick of first substrate
It is least partially overlapped to spend direction.Light-emitting component is set to the wherein side of display panel, for generating the first substrate
One sensing light beam.Sensing light beam is passed to opening by the first reflecting layer and the second reflecting layer, and projects euphotic cover plate,
And a part for sensing light beam is totally reflected by surface, to form a signal beams.Image capture element is set to display panel
The other side, to receive signal beams.
An other technical solution used by the utility model is to provide a kind of image-taking device comprising: an euphotic cover
Plate, a display panel, a light guide, a light-emitting component and an image capture element.Euphotic cover plate has to be connect with surrounding medium
One surface of touching, and surface has a viewing area.Display panel corresponds to viewing area and is set to below euphotic cover plate.Light guide is set
It is placed between display panel and euphotic cover plate, wherein the light guide is divided into a smooth conducting part and a smooth penetration portion.Hair
Optical element is set to the wherein side of light guide, and to generate the sensing light beam for entering light conducting part.Light beam is sensed in light
It is passed to light penetration portion in conducting part, to project the viewing area of euphotic cover plate, and senses a part of light beam by table
Face total reflection, to form the signal beams for entering light guide by light penetration portion.Image capture element is set to the another of light guide
Side, to receive signal beams.
A wherein beneficial effect of the utility model is that image-taking device provided by the utility model can be by " setting
Set the light guide between display panel and euphotic cover plate and be distinguished a smooth conducting part and a smooth penetration portion " or " showing
The first reflecting layer and the second reflecting layer with opening is respectively set in the first substrate of panel up and down " technical solution, can be with
It is passed sensing light beam mainly in light guide or first substrate, the attachment for being attached to euphotic cover plate surface is avoided to influence
Image quality.
For the enabled feature and technology contents for being further understood that the utility model, please refer to below in connection with the utility model
Detailed description and schema, however provided schema is merely provided for reference and description, is not used to add the utility model
With limitation.
Detailed description of the invention
Fig. 1 is the schematic top plan view of the image-taking device of an embodiment of the present invention.
Fig. 2 is the partial cutaway schematic of the image-taking device of an embodiment of the present invention.
Fig. 3 is the partial enlargement diagram of the beam director of another embodiment of the utility model.
Fig. 4 is the partial enlargement diagram of the light penetration portion of the image-taking device of an embodiment of the present invention.
Fig. 5 is the partial cutaway schematic of the image-taking device of another embodiment of the utility model.
Fig. 6 is the partial cutaway schematic of the image-taking device of another embodiment of the utility model.
Wherein:
1,1 ', 2: image-taking device F: object
10,20: euphotic cover plate SA: sensing range
10S, 20S: surface 120: light guide body
10A, 20A: viewing area 120a: first surface
10B, 20B: non-display area 120b: second surface
11,21: display panel 121,221: the first reflecting layer
12: light guide 122,222: the second reflecting layer
P1: the first smooth conducting part 121h, 221h: opening
P2: the second smooth conducting part 15,25: optical cement
P3, P3 ': light penetration portion P1 ': light conducting part
13,23: light-emitting component 211a: upper surface
14,24: image capture element 211b: lower surface
111,211: first substrate W: sensing range maximum width
112,212: the second substrate W1: maximum width
CF: chromatic filter layer t1, t2, t3: thickness
17,27: backlight assembly L: sensing light beam
16,16', 26: beam director L ': signal beams
16S: reflecting surface θ: incident angle.
Specific embodiment
It is the implementation illustrated by particular specific embodiment in relation to " image-taking device " disclosed in the utility model below
The advantages of mode, those skilled in the art can understand the utility model by content disclosed in this specification and effect.This is practical
Novel to be implemented or be applied by other different specific embodiments, the various details in this specification may be based on difference
Viewpoint and application, carry out various modifications and change under the design for not departing from the utility model.In addition, the attached drawing of the utility model
It is only simple schematically illustrate, not according to the description of actual size, state in advance.The following embodiments and the accompanying drawings will be explained in further detail
The relevant technologies content of the utility model, but disclosure of that is not to limit the protection scope of the utility model.
It should be understood that although various elements or signal may be described using term first, second, third, etc. herein,
But these elements or signal should not be limited by these terms.These terms are mainly to distinguish an element and another member
Part or a signal and another signal.In addition, term "or" used herein, should may include correlation depending on actual conditions
Connection lists any of project or multiple combinations.
Please refer to Fig. 1 and Fig. 2.Fig. 1 is the schematic top plan view of the image-taking device of an embodiment of the present invention.Fig. 2 is this
The partial cutaway schematic of the image-taking device of one embodiment of utility model.Image-taking device provided by the utility model can be applied to one
In electronic product, to capture the image of an object F, to be recognized.Electronic product above-mentioned be, for example, smartphone or
Person is tablet computer.In addition, the image-taking device of the present embodiment is to shield lower image-taking device.
Accordingly, image-taking device 1 can use in a surrounding medium, and surrounding medium is, for example, either other kinds of empty gas and water
The surrounding medium of class.Object F above-mentioned is, for example, finger, palm, wrist or the eyeball of user, and image-taking device 1 is picked
The image taken is, for example, the images such as fingerprint, palmmprint, vein, pupil or iris, but the utility model is not limited.In this reality
In novel, by taking picking up fingerprint image as an example, to further illustrate the utility model.
As shown in Fig. 2, the utility model wherein an embodiment image-taking device 1 include an euphotic cover plate 10, a display surface
Plate 11, a light guide 12, a light-emitting component 13 and an image capture element 14.
It please cooperate referring to Fig.1 and Fig. 2, euphotic cover plate 10 have the surface 10S contacted with surrounding medium.In this implementation
In example, surface 10S is defined out an a viewing area 10A and non-display area 10B.
When image-taking device 1 is to picking up fingerprint and/or vein image, the surface 10S of euphotic cover plate 10 connects for finger
Touching or pressing, to be detected and be recognized.In the present embodiment, it is either soft to can be rigid material for the material of euphotic cover plate 10
Property material.For example, the material of euphotic cover plate 10 can be selected from glass, polymethyl methacrylate (polymethymethacry
Late, PMMA) or polycarbonate (Polycarbonate, PC) or other materials appropriate.
In the present embodiment, in order to allow user that can see picture shown by display panel 11 by euphotic cover plate 10,
Therefore the material of euphotic cover plate 10 is transparent for visible light.That is, visible light is big for the transmissivity of euphotic cover plate 10
In 80%.
Referring to Fig. 2, display panel 11 corresponds to viewing area 10A and is set to 10 lower section of euphotic cover plate, to be used to show picture
Face.Display panel 11 can be rigid, and in other words, be also possible to panel flexible, the display panel 11 can be organic
LED display panel, liquid crystal display panel or display panel (there is touch function) with touch control electrode etc.
Deng the utility model is not intended to limit.
In this example it is shown that panel 11 include at least a first substrate 111 and combined with first substrate 111 one
The second substrate 112.When display panel 11 is liquid crystal display panel of thin film transistor, first substrate 111 is colour filter array
Substrate.That is, display panel 11 is also set to the chromatic filter layer CF on first substrate 111 with one.The second substrate 112
For thin-film transistor array base-plate.In addition, display panel 11 is still further comprised positioned at first substrate 111 and the second substrate 112
Between display medium, such as: liquid crystal layer.
When display panel 11 is liquid crystal display panel of thin film transistor, image-taking device 1 still further comprises a backlight group
Part 17, and display panel 11 is set on backlight assembly 17.Backlight assembly 17 includes illuminating part (not shown) and optical diaphragm
Group (not shown).Optical diaphragm group can be used to that homogenizer caused by illuminating part is spread to and is projected to display panel 11.
In the present embodiment, light beam caused by illuminating part is visible light beam.
Referring to figure 2..The light guide 12 of the present embodiment is set between display panel 11 and euphotic cover plate 10.Light guide 12
Be divided into one first smooth conducting part P1, the one second smooth smooth penetration portion P3 of conducting part P2 and one, and the first smooth conducting part P1 with
Second smooth conducting part P2 is located at two opposite sides of light penetration portion P3.
It please cooperate referring to Fig.1, it is notable that in the present embodiment, viewing area 10A and the light of euphotic cover plate 10 penetrate
Portion P3 can be overlapped in a vertical direction.In addition, the first smooth smooth conducting part P2 of conducting part P1 and second also can be in vertical direction
It is Chong Die with viewing area 10A.
Furthermore, the sensing light beam L transmitted in the first smooth conducting part P1 can be passed to light penetration portion P3, with
Project the viewing area 10A of euphotic cover plate 10.That is, sensing light beam L meeting in the first smooth conducting part P1 of light guide 12
It is primary by least reflection, to be passed to light penetration portion P3.
Sensing light beam L can form signal beams L ' by the total reflection of the surface 10S of euphotic cover plate 10.Signal beams
L ' can enter the second smooth conducting part P2 by light penetration portion P3 again, and once be passed to image capture element by least reflection
14。
Referring to figure 2., in the present embodiment, sensing light beam L above-mentioned is as produced by light-emitting component 13.Light-emitting component 13
E.g. light emitting diode.In the utility model embodiment, light-emitting component 13 is infrared light light-emitting component, therefore senses light beam
L is infrared light.In one embodiment, the peak wavelength for sensing light beam L can be more than or equal to 800 nm to less than or equal to 900
The range of nm.
In the present embodiment, light-emitting component 13 is set to the wherein side of light guide 12, and enters the first light biography to generate
Lead the sensing light beam L of portion P1.That is, light-emitting component 13 is the side for being positioned close to the first smooth conducting part P1, and it is arranged
Below the non-display area 10B of euphotic cover plate 10.
In addition, in the present embodiment, image-taking device 1 further includes a beam director 16.Beam director 16 can be with
It is an optical lens components, a secondary component, a grating, an optical microstructures layer, a diffraction element or combinations thereof, this is practical new
Type is not intended to limit.Beam director 16 is set in the optical path of sensing light beam L, is passed with adjustment sensing light beam L into the first light
Lead the incident angle θ of portion P1.Specifically, as shown in Fig. 2, sensing light beam L caused by light-emitting component 13 is oriented by light beam
After element 16, light guide 12 is entered with a scheduled incident angle θ.In the present embodiment, beam director 16 is set to
Between light-emitting component 13 and light guide 12.
As long as the utility model is not intended to limit structure and the position of beam director 16 however, can reach above-mentioned purpose
It sets.Referring to figure 3., Fig. 3 show be the beam director of another embodiment of the utility model partial enlargement diagram.At this
In embodiment, beam director 16 ' is optical microstructures, and beam director 16 ' has a reflecting surface 16S.
The beam director 16 ' of the present embodiment is to be arranged on light guide 12, and reflecting surface 16S can be corresponding to luminous
The light-emitting surface of element 13.Accordingly, sensing light beam L caused by light-emitting component 13 is first incident to leaded light through beam director 16 '
After part 12, it is projected to reflecting surface 16S.Then, sensing light beam L passes through the reflection of reflecting surface 16S again, with a default incidence
Angle, θ enters the first smooth conducting part P1, wherein the incident angle is between 45 degree to 55 degree.
Please cooperate again referring to Fig.1 with Fig. 2, image capture element 14 is set to the other side of light guide 12, to receive the
The signal beams L ' being passed in two smooth conducting part P2.Specifically, image capture element 14 is to be positioned close to the second light biography
The side of portion P2 is led, and is located at below the non-display area 10B of euphotic cover plate 10.In addition, it should be noted that, in the utility model
Any possible embodiments in, a bandpass filtering layer is provided between image capture element 14 and light guide 12.
After image capture element 14 receives signal beams L ', signal beams L ' is converted into electric signal.In other words, image
Capturing element 14 be a kind of photo-electric conversion element, e.g. charge coupled cell (Charge Coupled Device, CCD) or
It is complementary metal oxide semiconductor element (Complementary Metal-Oxide Semiconductor, CMOS).
However, in other embodiments, other image sensors also can be used in image capture element 14.
Based on above-mentioned, as the surface 10S of object F (such as: finger) contact euphotic cover plate 10, the burr of finger touches table
Face 10S, the sensing light beam L that a part can be made to project surface 10S can not generate total reflection, so that image capture element 14 be made to take
The dark line of finger burr must be corresponded to.On the other hand, the dimpled grain of finger does not touch the surface 10S of euphotic cover plate 10, and makes another
A part sensing light beam L can still be totally reflected and form signal beams L '.Signal beams L ' by the second smooth conducting part P2 reflection and
It is received by image capture element 14.And then shadow is carried out to received signal beams L ' by an image processing element
As processing, available light and dark fingermark image.
Significantly, since the size of light penetration portion P3 limits, sensing light beam L can only project viewing area 10A's
Subrange.Similarly, sensing light beam L, which is only totally reflected in particular range, is formed by signal beams L ' and can just enter back into light
Penetration portion P3, and image capture element 14 is transferred to by the second smooth conducting part P2.
Accordingly, as shown in Figure 1, in this example it is shown that area 10A can have the sensing range corresponding to light penetration portion P3
SA.Therefore, only be located at sensing range SA in object F, can just be sensed light beam L irradiation, and formed by light penetration portion P3 into
Enter the signal beams L ' to the second smooth conducting part P2.In other words, when finger is placed on except sensing range SA by user
When other regions, image capture element 14 can't receive signal beams L '.
It accordingly, can by limiting light penetration portion P3 size, position and the incident angle θ for sensing light beam L of light guide 12
To define size and the position of sensing range SA.In the present embodiment, the maximum width of light penetration portion P3 can be greater than sensing
The maximum width of range SA.
Referring to figure 2. and Fig. 4, wherein Fig. 4 is the office of the light penetration portion of the image-taking device of an embodiment of the present invention
Portion's enlarged diagram.In the present embodiment, light guide 12 includes a light guide body 120, the first reflecting layer 121 and the second reflecting layer
122.Light guide body 120 has a first surface 120a and second surface 120b opposite with first surface 120a, and guide-lighting
Ontology 120 is to be arranged with first surface 120a towards euphotic cover plate 10.
In the present embodiment, the first reflecting layer 121 is set to first surface 120a, and has an opening 121h, and second
Reflecting layer 122 is to be set to second surface 120b.In other words, the first reflecting layer 121 and the second reflecting layer 122 are to be located at
Two opposite sides of light guide body 120.
As shown in Fig. 2, the first reflecting layer 121 overlaps each other with the second reflecting layer 122 in vertical direction, at least to define
The first smooth smooth conducting part P2 of conducting part P1 and second above-mentioned.In addition, the reflection of the opening 121h in the first reflecting layer 121 and second
Layer 122 overlaps each other in vertical direction, to define smooth penetration portion P3 above-mentioned.In addition, opening 121h and viewing area 10A is being led
It overlaps each other on the thickness direction of trimmed book body 120.
In one embodiment, the refraction coefficient in the first reflecting layer 121 and the refraction coefficient in the second reflecting layer 122 are below led
The refraction coefficient of trimmed book body 120.For example, if the refraction coefficient n of light guide body 120LAbout 1.4, the first reflecting layer
121 and second the material in reflecting layer 122 can choose refraction coefficient nRMaterial less than 1.4, such as: the low refraction silica gel of methyl.
The incident angle θ for entering light guide body 120 by control sensing light beam L can make to sense light beam L in light guide body more than 120
Secondary total reflection.
Accordingly, in the present embodiment, into the sensing light beam L of the first smooth conducting part P1 can by being totally reflected at least once,
And it is passed to light penetration portion.Similarly, can also be led to by the signal beams L ' of light penetration portion P3 into the second smooth conducting part P2
It crosses and is totally reflected at least once, and received by image capture element 14.
Assuming that the first reflecting layer 121 is identical as the refraction coefficient in the second reflecting layer 122.First reflecting layer 121 (or second is anti-
Penetrate layer 122) refraction coefficient nR, light guide body 120 refraction coefficient nLAnd sensing light beam L enters the incidence of light guide body 120
Angle, θ meets following relationship: θ > sin-1(nL/nR)。
As shown in Fig. 2, the image-taking device 1 of the present embodiment still further comprises an optical cement 15.Optical cement 15 is located at first
Between reflecting layer 121 and euphotic cover plate 10, and in a part filling opening 121h of optical cement 15.
In the present embodiment, by selecting suitable material, make the refraction coefficient of optical cement 15, the folding of light guide body 120
The refraction coefficient for penetrating coefficient and euphotic cover plate 10 is roughly the same.Accordingly, it can avoid sensing light beam L to enter thoroughly from light penetration portion P3
Light cover board 10 or signal beams L ' are refracted when entering back into light guide body 120 by light penetration portion.
The image-taking device 1 of the present embodiment further includes another optical cement being set between display panel 11 and light guide 12
15, so that light guide 12 can be combined by optical cement 15 with display panel 11.
In addition, light penetration portion P3 corresponds to a sensing range SA of viewing area 10A, and the one of sensing range SA referring to Fig. 4
Maximum width W is less than a maximum width of light penetration portion P3, that is, is less than the maximum width W1 of opening 121h.
Furthermore, as shown in figure 4, in the present embodiment, the maximum width W1 for the 121h that is open, sensing range SA's
Maximum width W, the thickness t of light guide body 1201, most short vertical range t between light guide body 120 and euphotic cover plate 102(
It is exactly the thickness of the optical cement 15 in opening 121h), the thickness t of euphotic cover plate 103, and the incidence angle of sensing light beam L
Degree θ meets following relationship: 2 (t1 +t2 +t3)tanθ> W1>W+2(t2 +t3) tanθ。
It should be noted that in the present embodiment, the backlight assembly 17 of image-taking device 1 is to generate visible light beam.Therefore,
Visible light beam is greater than 80% to light guide 12 and 10 transmissivity of euphotic cover plate, user can see in viewing area 10A by showing
Show picture shown by panel 11.
In another embodiment, sensing light beam L is infrared light, and the first reflecting layer 121 and the second reflecting layer 122 are all infrared
Optical reflection film.It is worth noting that, the first reflecting layer 121 and the second reflecting layer 122, which can choose, has high reflection to infrared light
Rate, but there is the material of high-penetration rate to visible light.
For example, infrared light reflecting film can be high refractive index material layer replace storehouse with low refractive index material layer and
The dielectric multilayer film of formation.Common high-index material such as titanium oxide base (TiO2, Ti3O5) or tantalum oxide (Ta2O5), it is low
Refraction materials such as silicon oxide series (SiO2) or magnesium fluoride (MgF2), can also arrange in pairs or groups sometimes in refractive material such as aluminium oxide (Al2O3)
Or zirconium oxide (ZrO2)。
As long as it should be noted that can make to sense light beam L and signal beams L ' in the first smooth conducting part P1 and second
Transmitting, the utility model are not restricted to above-described embodiment in light conducting part P2.For example, in other embodiments, first
Reflecting layer 121 and the second reflecting layer 122 wherein one layer be infrared light reflecting film, and another layer choosing selects refraction coefficient lower than leaded light
The material of the refraction coefficient of ontology 120, and control sensing light beam L is cooperated to project the first reflecting layer 121 or the second reflecting layer
122 incident angle θ, also can achieve the purpose of this utility model.
Compared to existing fingeprint distinguisher, in the utility model embodiment, pass through the first reflecting layer 121 and second
The cooperation in reflecting layer 122 can make to sense light beam L and signal beams L ' to be mainly the light guide body below euphotic cover plate 10
Transmitting in 120.In addition, can be defined in the viewing area 10A of euphotic cover plate 10 by the first reflecting layer 121 with opening 121h
Specific sensing range SA out.It can thus be avoided the dirty intensity for causing sensing light beam L of the surface 10S of euphotic cover plate 10
The problem of reducing, and reducing capture quality.
Referring to figure 5., be another embodiment of the utility model image-taking device partial cutaway schematic.The present embodiment
The element identical with the image-taking device 1 of previous embodiment of image-taking device 1 ' has same or similar label, and identical portion
Divide and repeats no more.
In the present embodiment, the opening 121h in the first reflecting layer 121 in vertical direction with viewing area 10A and non-display
Area 10B overlapping.Furthermore, opening 121h can be by extending to 14 top of image capture element above display panel 11.
Accordingly, the light guide 12 of the present embodiment can be divided into a smooth smooth penetration portion P3 ' of conducting part P1 ' and one.It is bowing
In apparent direction, light penetration portion P3 ' can be Chong Die with the non-display area 10B of 14 top viewing area 10A and image capture element.
In addition, light-emitting component 13 is arranged adjacent to light conducting part P1 ', and image capture element 14 is adjacent to light penetration portion P3
Setting.Accordingly, sensing light beam L caused by light-emitting component 13 can be transferred to light penetration portion P3 ' by light conducting part P1 '.
In addition, sensing light beam L formed signal beams L ' after sensing range SA is totally reflected can directly be worn by light
Saturating portion P3 ' enters image capture element 14, without just can enter image capture element 14 using multiple reflections.Therefore,
It can avoid loss of the signal beams L ' in transmittance process in the image-taking device 1 ' of the present embodiment.
Fig. 6 is please referred to, is the partial cutaway schematic of the image-taking device of another embodiment of the utility model.The present embodiment
Image-taking device 2 include euphotic cover plate 20, display panel 21, the first reflecting layer 221, the second reflecting layer 222, light-emitting component 23 and
Image capture element 24.
Similar to the embodiment of Fig. 2, euphotic cover plate 20 has the surface 20 contacted with surrounding medium, and surface 20 is defined
An a viewing area 20A and non-display area 20B out.
It in the present embodiment, is that sensing light beam L and signal beams are conducted by the first substrate 211 of display panel 21
L'.Therefore, the first reflecting layer 221 is the two opposite tables that the first substrate 211 of display panel 21 is arranged in the second reflecting layer 222
Face.
Specifically, the first substrate 211 of display panel 21 have towards euphotic cover plate 10 a upper surface 211a and
A lower surface 211b opposite with upper surface 211a.The first reflecting layer 221 with opening 121h is to be set to upper surface 211a,
And the second reflecting layer 222 is to be set to lower surface 211b.
First reflecting layer 221 is least partially overlapped in the thickness direction of first substrate 211 with the second reflecting layer 222.Therefore,
First reflecting layer 221 part Chong Die with the second reflecting layer 222 can first substrate 211 define the first smooth conducting part P1 and
Second smooth conducting part P2.In addition, part opening 221h Chong Die with the second reflecting layer 222 can define in first substrate 111
Light penetration portion P3.The first smooth smooth conducting part P2 of conducting part P1 and second is two opposite sides for being located at light penetration portion P3.
In addition, in the present embodiment, the opening 221h in the first reflecting layer 221 is only overlapped with viewing area 20A.However,
In other embodiments, the opening 221h in the first reflecting layer 221 can also be heavy with viewing area 20A and non-display area 20B simultaneously
It is folded or only Chong Die with non-display area 20B.
Light-emitting component 23 is set to the wherein side of display panel 21, for generating the sense for entering first substrate 211
Survey light beam L.Sensing light beam L is passed to opening 221h by the first reflecting layer 221 and the second reflecting layer 222, and projects
Euphotic cover plate 20.Sensing light beam L is totally reflected by the surface 20 of euphotic cover plate 20, to form signal beams L '.
Image capture element 24 is set to the other side of display panel 21, to receive signal beams L '.In the present embodiment,
After signal beams L ' enters first substrate 211 by the 221h that is open, image can be passed in the second smooth conducting part P2 and picked
Take element 24.However, in other embodiments, when the 221h that is open is located adjacent to 24 top of image capture element, signal light
Beam L ' directly can enter image capture element 24 by the 221h that is open.The choosing of the material in the first reflecting layer 221 and the second reflecting layer 222
It selects, and the maximum width W1 of opening 221h can refer to previous explanation, this will not be repeated here.
It should be noted that in the present embodiment, when display panel 21 is liquid crystal display panel of thin film transistor, display
Panel 21 further includes a chromatic filter layer CF.The lower surface 211b of first substrate 211 can be arranged in chromatic filter layer CF, and covers
Second reflecting layer 222.In other words, the second reflecting layer 222 is between chromatic filter layer CF and first substrate 211.
In addition, image-taking device 2 can also further comprise a backlight assembly 27 to generate a visible light beam.With it is previous
Embodiment is similar, and display panel 21 is set on backlight assembly 27.In addition, visible light beam reflects the first reflecting layer 221, second
The transmissivity of layer 222 and euphotic cover plate 20 is greater than 80%.However, in other embodiments, when display panel 21 is organic light emission
When diode panel, backlight assembly 27 can also be omitted.
In addition, the term in all embodiments of the utility model " light conducting part ", " the first smooth conducting part " or " the second light
Conducting part " refers to light guide 12 or first substrate 211 allows the part of sensing light beam L and signal beams L ' transmitting, and "
Light penetration portion " refers in light guide 12 or first substrate 211, allows sensing light beam L and signal beams L ' disengaging other
The part of element.
Therefore, when sensing light beam L and signal beams L ' is infrared light, " light conducting part ", " the first smooth conducting part " or
It is " the second smooth conducting part " all refer to the part of 211 transmitting IR of light guide 12 or first substrate, and " light penetration portion " be
Refer to the part that light guide 12 or first substrate 211 can be such that infrared light penetrates.
That is, the backlight assembly 17,27 of image-taking device 1,1 ', 2 or as caused by display panel 11,21 itself
Visible light beam, can't be " light conducting part ", " the first smooth conducting part " or " the second smooth conducting part " reflected, and influence to use
Person watches display picture.
In addition, the image-taking device 1,1 ', 2 of the utility model embodiment can also further comprise that (figure is not for a bandpass filtering layer
Show).In Fig. 2 and embodiment shown in fig. 5, bandpass filtering layer may be disposed at image capture element 14 and light guide 12 it
Between, to the stray light other than trap signal light beam L '.
For example, when signal beams L ' be infrared light when, bandpass filtering layer for signal beams L ' penetrance at least
Greater than 80%, and 20% is less than to the penetrance of visible light and ultraviolet light.Furthermore, bandpass filtering layer can be infrared band
Logical filter layer, and the light beam within the scope of allowing wavelength to fall in 800 nm to 900 nm passes through, and may filter that wavelength is fallen in
Light beam other than the range of 800 nm to 900 nm.In other embodiments, bandpass filtering layer allows wavelength to fall in 840 nm
Light beam to 860 nm, or allow wavelength fall in 890 nm to 990 nm it is another within the scope of light beam it is logical
It crosses.
In the embodiment in fig 6, bandpass filtering layer may be disposed between image capture element 24 and first substrate 211.
In this way, light beam caused by the avoidable environment light of bandpass filtering layer, display panel 11,21 or backlight assembly 17,27 enters image
Capturing element 14,24, causes signal interference.Accordingly, by the way that bandpass filtering layer is arranged, the identification of image-taking device 1,1 ', 2 can be promoted
Precision.
In conclusion a wherein beneficial effect of the utility model is, image-taking device 1 provided by the utility model,
1 ', 2, by the way that " light guide being arranged between display panel and euphotic cover plate is distinguished a smooth conducting part and a light penetrates
Portion " or the first reflecting layer and the second reflecting layer of opening " be respectively set above and below the first substrate of display panel with "
Technical solution can make to sense light beam L mainly quilt in the light guide 12 or first substrate 211 below euphotic cover plate 10,20
Transmitting, and sensing range SA can be defined by opening 121h, 221h in the first reflecting layer 121,221, it can avoid being attached to
The attachment influence image quality of light cover board 10,20 surface 10S, 20S.
Furthermore, compared to existing fingeprint distinguisher, in the utility model embodiment, light transmission is mainly utilized
The light guide 12 of 10,20 lower section of cover board or the first substrate 211 of display panel 21 sense light beam L and signal beams to transmit
L ', therefore can be to avoid the dirty strength reduction for causing sensing light beam L of surface 10S, 20S of euphotic cover plate 10,20.Accordingly,
The image-taking device 1,1 ', 2 of the utility model embodiment can have preferable capture quality.
Content disclosed above is only the preferred possible embodiments of the utility model, and Bing is non-to limit the utility model because of Ci Authority
Claim, so it is all done with the utility model specification and schema content equivalence techniques variation, wrap
In claim contained in the utility model.
Claims (25)
1. a kind of image-taking device, it is characterised in that: include:
One euphotic cover plate has the surface contacted with surrounding medium, wherein the surface has a viewing area；
One display panel corresponds to the viewing area and is set to below the euphotic cover plate；
One light guide is set between the display panel and the euphotic cover plate, wherein the light guide is divided into one
First smooth conducting part, one second smooth conducting part and a smooth penetration portion, the viewing area and the smooth penetration portion are in a Vertical Square
Overlapping upwards, and the first smooth conducting part and the described second smooth conducting part are located at two opposite sides of the smooth penetration portion；
One light-emitting component is set to the wherein side of the light guide, and to generate into the described first smooth conducting part
One sensing light beam, wherein the sensing light beam is passed to the smooth penetration portion in the described first smooth conducting part, to project
The viewing area of the euphotic cover plate, and a part of the sensing light beam is totally reflected by the surface, to be formed by described
Light penetration portion enters a signal beams of the described second smooth conducting part；And
One image capture element is set to the other side of the light guide, is passed in the described second smooth conducting part with receiving
The signal beams passed.
2. image-taking device as described in claim 1, which is characterized in that the light guide includes:
One light guide body has a first surface and a second surface opposite with the first surface, wherein described the
One surface is towards the euphotic cover plate；
One first reflecting layer, is set to the first surface, wherein first reflecting layer has an opening；And
One second reflecting layer, is set to the second surface；
Wherein, first reflecting layer overlaps each other with second reflecting layer in the vertical direction, at least to define institute
State the first smooth conducting part and the second smooth conducting part, the opening and second reflecting layer the vertical direction each other
Overlapping, to define the smooth penetration portion.
3. image-taking device as claimed in claim 2, which is characterized in that the refraction coefficient in first reflecting layer and described second
The refraction coefficient in reflecting layer is below the refraction coefficient of the light guide body.
4. image-taking device as claimed in claim 2, which is characterized in that the refraction coefficient n in second reflecting layerR, the leaded light
The refraction coefficient n of ontologyLAnd the incident angle θ that the sensing light beam enters the light guide body meets following relationship: θ >
sin-1(nL/nR)。
5. image-taking device as claimed in claim 2, which is characterized in that the sensing light beam is infrared light, first reflection
Layer and second reflecting layer are all infrared light reflection layers.
6. image-taking device as claimed in claim 2, which is characterized in that still further comprise an optical cement, wherein the optics
Glue is between first reflecting layer and the euphotic cover plate, and a part of the optical cement is inserted in the opening.
7. image-taking device as claimed in claim 6, which is characterized in that the refraction coefficient of the optical cement, the light guide body
Refraction coefficient and the euphotic cover plate refraction coefficient it is identical.
8. image-taking device as claimed in claim 2, which is characterized in that a maximum width W1 of the opening, the leaded light is originally
The thickness t of body1, most short vertical range t between the light guide body and the euphotic cover plate2, the thickness of the euphotic cover plate
t3And the incident angle θ of the sensing light beam meets following relationship: 2 (t1 +t2 +t3)tanθ> W1。
9. image-taking device as described in claim 1, which is characterized in that the viewing area has corresponding to the smooth penetration portion
One sensing range, and a maximum width of the sensing range is less than a maximum width of the smooth penetration portion.
10. image-taking device as described in claim 1, which is characterized in that still further comprise a beam director, the light
Beam directed element is set in the optical path of the sensing light beam, enters the described first smooth conducting part to adjust the sensing light beam
One incident angle.
11. image-taking device as described in claim 1, which is characterized in that still further comprise a backlight assembly, the backlight group
Part is set on the backlight assembly to generate a visible light beam, the display panel, and the visible light beam is led to described
The transmissivity of light part and the euphotic cover plate is greater than 80%.
12. a kind of image-taking device characterized by comprising
One euphotic cover plate has the surface contacted with surrounding medium, wherein the surface has a viewing area；
One display panel is set to below the euphotic cover plate, and corresponds to the viewing area, wherein the display panel
A second substrate including at least a first substrate and in conjunction with the first substrate, the first substrate have described in
One upper surface of euphotic cover plate and a lower surface opposite with the upper surface；
One first reflecting layer is set to the upper surface, and has an opening；
One second reflecting layer, is set to the lower surface, wherein first reflecting layer is with second reflecting layer described
One thickness direction of first substrate is least partially overlapped；
One light-emitting component is set to the wherein side of the display panel, for generating one into the first substrate
Sense light beam, wherein the sensing light beam is passed to described open by first reflecting layer and second reflecting layer
Mouthful, and the euphotic cover plate is projected, a part of the sensing light beam is totally reflected by the surface, to form a signal light
Beam；And
One image capture element is set to the other side of the display panel, to receive the signal beams.
13. image-taking device as claimed in claim 12, which is characterized in that the refraction coefficient in first reflecting layer and described the
The refraction coefficient in two reflecting layer is below the refraction coefficient of the first substrate, so that the sensing light beam generates total reflection.
14. image-taking device as claimed in claim 13, which is characterized in that the refraction coefficient n in second reflecting layerR, described
The refraction coefficient n of one substrateLAnd the incident angle θ that the sensing light beam projects first reflecting layer meets following relationship
Formula: θ > sin-1(nL/nR)。
15. image-taking device as claimed in claim 12, which is characterized in that the sensing light beam is infrared light, and described first is anti-
Penetrating layer and second reflecting layer is all infrared light reflection layer.
16. image-taking device as claimed in claim 12, which is characterized in that still further comprise an optical cement, wherein the light
Glue is learned between first reflecting layer and the euphotic cover plate, and a part of the optical cement is inserted in the opening.
17. image-taking device as claimed in claim 16, which is characterized in that the refraction coefficient of the optical cement, first base
The refraction coefficient of the refraction coefficient of plate and the euphotic cover plate is identical.
18. image-taking device as claimed in claim 12, which is characterized in that a maximum width W1 of the opening, described first
The thickness t of substrate1, most short vertical range t between the first substrate and the euphotic cover plate2, the thickness of the euphotic cover plate
t3And the incident angle θ of the sensing light beam meets following relationship: 2 (t1 +t2 +t3)tanθ> W1。
19. image-taking device as claimed in claim 12, which is characterized in that a beam director is still further comprised, it is described
Beam director is set between the light-emitting component and the first substrate, enters described the to adjust the sensing light beam
One incident angle of one substrate.
20. image-taking device as claimed in claim 12, which is characterized in that the opening is with the viewing area in the thickness side
It is overlapped to each other, and the viewing area has the sensing range corresponding to the opening, the one of the sensing range is maximum wide
Degree is less than a maximum width of the opening.
21. image-taking device as claimed in claim 12, which is characterized in that still further comprise a backlight assembly, the backlight
Component is set on the backlight assembly to generate a visible light beam, the display panel, and the visible light beam is to described
The transmissivity in the first reflecting layer, second reflecting layer and the euphotic cover plate is greater than 80%.
22. image-taking device as claimed in claim 12, which is characterized in that the euphotic cover plate also has a non-display area, institute
It states opening to overlap each other with the non-display area in the thickness direction, and the non-display area has corresponding to the opening
One sensing range, a maximum width of the sensing range are less than a maximum width of the opening.
23. a kind of image-taking device characterized by comprising
One euphotic cover plate has the surface contacted with surrounding medium, wherein the surface has a viewing area；
One display panel corresponds to the viewing area and is set to below the euphotic cover plate；
One light guide is set between the display panel and the euphotic cover plate, wherein the light guide is divided into one
Light conducting part and a smooth penetration portion；
One light-emitting component is set to the wherein side of the light guide, and to generate the sense into the smooth conducting part
Survey light beam, wherein the sensing light beam is passed to the smooth penetration portion in the smooth conducting part, to project the light transmission
The viewing area of cover board, and a part of the sensing light beam is totally reflected by the surface, to be formed by the smooth penetration portion
Into a signal beams of the light guide；And
One image capture element is set to the other side of the light guide, to receive the signal beams.
24. image-taking device as claimed in claim 23, which is characterized in that the light guide includes:
One light guide body has a first surface and a second surface opposite with the first surface, wherein described the
One surface is towards the euphotic cover plate；
One first reflecting layer, is set to the first surface, wherein first reflecting layer has an opening；The light is worn
Saturating portion overlaps each other with the viewing area in a vertical direction, and the viewing area has the sense corresponding to the smooth penetration portion
Range is surveyed, a maximum width of the sensing range is less than a maximum width of the opening.
25. image-taking device as claimed in claim 24, which is characterized in that the euphotic cover plate also has a non-display area, institute
It states image capture element to be set to below the non-display area, the smooth penetration portion can be with the viewing area in a vertical direction
And the non-display area overlapping above the image capture element.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201762574222P | 2017-10-19 | 2017-10-19 | |
| US62/574,222 | 2017-10-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208848215U true CN208848215U (en) | 2019-05-10 |
Family
ID=66376196
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821701336.0U Active CN208848215U (en) | 2017-10-19 | 2018-10-19 | Image-taking device |
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| Country | Link |
|---|---|
| CN (1) | CN208848215U (en) |
| TW (1) | TWM575561U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110487515A (en) * | 2019-08-31 | 2019-11-22 | 深圳阜时科技有限公司 | A kind of optical detection apparatus and electronic equipment |
| CN112099259A (en) * | 2020-10-15 | 2020-12-18 | 武汉华星光电技术有限公司 | Liquid crystal display module and liquid crystal display device |
| CN114332963A (en) * | 2021-12-21 | 2022-04-12 | 厦门天马微电子有限公司 | Display panel and display device |
| CN114529954A (en) * | 2020-11-05 | 2022-05-24 | 金佶科技股份有限公司 | Image capturing device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111897454A (en) * | 2020-07-24 | 2020-11-06 | 业成科技（成都）有限公司 | Light emitting assembly, manufacturing method thereof and electronic device |
-
2018
- 2018-10-19 CN CN201821701336.0U patent/CN208848215U/en active Active
- 2018-10-19 TW TW107214184U patent/TWM575561U/en unknown
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110487515A (en) * | 2019-08-31 | 2019-11-22 | 深圳阜时科技有限公司 | A kind of optical detection apparatus and electronic equipment |
| CN112099259A (en) * | 2020-10-15 | 2020-12-18 | 武汉华星光电技术有限公司 | Liquid crystal display module and liquid crystal display device |
| CN114529954A (en) * | 2020-11-05 | 2022-05-24 | 金佶科技股份有限公司 | Image capturing device |
| CN114332963A (en) * | 2021-12-21 | 2022-04-12 | 厦门天马微电子有限公司 | Display panel and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| TWM575561U (en) | 2019-03-11 |
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