WO2018113102A1 - Biometric identification device - Google Patents

Biometric identification device Download PDF

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Publication number
WO2018113102A1
WO2018113102A1 PCT/CN2017/076319 CN2017076319W WO2018113102A1 WO 2018113102 A1 WO2018113102 A1 WO 2018113102A1 CN 2017076319 W CN2017076319 W CN 2017076319W WO 2018113102 A1 WO2018113102 A1 WO 2018113102A1
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WO
WIPO (PCT)
Prior art keywords
light
component
components
collimator
assembly
Prior art date
Application number
PCT/CN2017/076319
Other languages
French (fr)
Chinese (zh)
Inventor
王炯翰
Original Assignee
创智能科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 创智能科技股份有限公司 filed Critical 创智能科技股份有限公司
Publication of WO2018113102A1 publication Critical patent/WO2018113102A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F18/00—Pattern recognition

Definitions

  • the invention relates to a biometric identification device.
  • the types of biometrics include face, sound, iris, retina, vein, fingerprint, and palmprint recognition. Since each person's fingerprint is unique and the fingerprint is not easy to change with age or physical health, the fingerprint identification device has become the most popular biometric identification device. According to the different sensing methods, the fingerprint identification device can be divided into optical and capacitive. When the capacitive fingerprint identification device is assembled in an electronic product (for example, a mobile phone or a tablet computer), a cover lens is disposed above the capacitive fingerprint identification device. In general, additional processing (eg, drilling or thinning) of the protective component is required to enable the capacitive fingerprinting device to sense a change in capacitance or electric field caused by a finger touch.
  • an electronic product for example, a mobile phone or a tablet computer
  • the optical fingerprint identification device captures light that easily penetrates the protection component for fingerprint recognition, and can eliminate the need for additional processing of the protection component, thereby facilitating the combination with the electronic product.
  • the optical fingerprint identification device generally includes a light source, an image capturing component, and a light transmitting component.
  • the light source is used to emit a light beam to illuminate a finger pressed against the light transmissive component.
  • Finger fingerprints are made up of a number of irregular ridges and indentations.
  • the beams reflected by the ridges and the indentations are formed as a fingerprint image of the light and dark interlaced on the receiving surface of the image capturing assembly.
  • the image capturing component can convert the fingerprint image into corresponding image information and input the image information into the processing unit.
  • the processing unit may use an algorithm to calculate image information corresponding to the fingerprint for identification of the user.
  • the light beam reflected by the fingerprint is easily transmitted to the image capturing component, which results in poor image quality and affects the identification result.
  • the invention provides a biometric identification device.
  • the biometric device comprises a light source, a light guiding component, an image capturing component and a first collimator.
  • the light source is adapted to provide a light beam.
  • the light guiding component is located on the transmission path of the light beam.
  • the image capture component is located below the light guide component and has a plurality of pixel regions.
  • the first collimator is located between the light guiding component and the image capturing component, wherein the first collimator comprises a first collimating component and a second collimating component.
  • the first collimating assembly includes a plurality of first light absorbing assemblies spaced apart.
  • the second collimating assembly overlaps the first collimating assembly and includes a plurality of second light absorbing assemblies spaced apart.
  • the second light absorbing component is interleaved with the first light absorbing component to define a plurality of light transmissive regions.
  • the light transmissive area overlaps the pixel area.
  • the light guiding member has a light exiting portion and a light incident portion connected to the light exiting portion.
  • the light source and the image capturing component are located below the light exiting portion.
  • the light incident portion is located between the light source and the light exit portion.
  • the light source is located at a side of the light guiding assembly.
  • the light guiding member is formed with a plurality of microstructures facing the surface of the first collimator.
  • the microstructure is convex or concave on the surface.
  • the first collimating assembly further includes a plurality of first light transmissive components.
  • the first light absorbing component and the first light transmitting component are alternately arranged and connected to each other.
  • the second collimating assembly further includes a plurality of second Light transmissive component.
  • the second light absorbing component and the second light permeable component are alternately arranged and connected to each other.
  • the refractive indices of the first light transmissive component and the second light transmissive component are each greater than 1.
  • the refractive indices of the first light transmissive component and the second light transmissive component fall within a range of 1.3 to 1.7, respectively.
  • the width and height ratios of the first light transmissive component and the second light transmissive component fall within a range of 2 to 20, respectively.
  • the first light absorbing member and the first light permeable member are alternately arranged in the first direction and respectively extend in a second direction intersecting the first direction.
  • the second light absorbing component and the second light permeable component are alternately arranged in the second direction and respectively extend in the first direction.
  • the biometric device further includes a cover plate, wherein the light guide assembly is located between the cover plate and the first collimator.
  • the biometric device further includes a second collimator.
  • the second collimator is located between the light guide assembly and the first collimator and includes a plurality of prisms.
  • the apex angle of the prism refers to the light guide assembly.
  • the first light absorbing component and the second light absorbing component are used to absorb the large-angle light beams in different directions to collimate the light beam transmitted to the image capturing component, so that The image capture component's image quality is improved. Therefore, the biometric device can have good recognition capabilities.
  • FIG. 1 is a schematic cross-sectional view of a biometric device according to an embodiment of the present invention
  • Figure 2 is an enlarged view of the light guiding assembly of Figure 1;
  • 3A is a top plan view of the first collimating assembly of the first collimator of FIG. 1;
  • 3B is a top plan view of the second collimating assembly of the first collimator of FIG. 1;
  • 3C is a top plan view of the first collimating assembly of FIG. 3A and the second collimating assembly of FIG. 3B;
  • FIG. 4 is a cross-sectional view of the first collimator, the image capturing assembly, and the circuit board of FIG. 1;
  • Figure 5 is an enlarged view of the light guiding assembly and the second collimator of Figure 1;
  • FIG. 6 is a cross-sectional view of a biometric device according to another embodiment of the present invention.
  • 100, 100A biometric identification device
  • 120, 120A light guiding component
  • B, B', B1', B2' light beam
  • B1 a first light absorbing component
  • B2 a second light absorbing component
  • H1, H2 height
  • PR pixel area
  • T1 a first light transmissive component
  • T2 a second light transmissive component
  • W1, W2 width.
  • the biometric device 100 is, for example, a fingerprint identification device for identifying the fingerprint of the object 10 to be identified, but is not limited thereto. In another embodiment, the biometric device 100 can also be used to identify a combination of at least two of a vein, a palm print, or a fingerprint, a vein, and a palm print.
  • the biometric device 100 includes a light source 110, a light guiding component 120, an image capturing component 130, and a first collimator 140.
  • Light source 110 is adapted to provide beam B.
  • Light source 110 can be a non-visible light source or a visible light source. That is, the light beam B may be invisible light (eg, infrared light) or visible light (eg, red light, blue light, green light, or a combination thereof).
  • light source 110 can be a combination of a non-visible light source and a visible light source.
  • the light source 110 can include multiple Light emitting components 112.
  • Light emitting component 112 can be a light emitting diode or other suitable type of light emitting component.
  • FIG. 1 schematically shows two lighting assemblies 112 with two lighting assemblies 112 on opposite sides of the image capturing assembly 130. However, the number and arrangement of the light-emitting components 112 can be changed as needed, and is not limited thereto.
  • the light guiding component 120 is located on the transmission path of the light beam B, and is adapted to direct the light beam B provided by the light source 110 to the object to be recognized 10.
  • the material of the light guiding component 110 can be glass, polycarbonate (PC), polymethyl methacrylate (PMMA) or other suitable materials.
  • the light source 110 and the image capturing component 130 are located on the same side of the light guiding component 120.
  • the biometric device 100 further includes a circuit board 150.
  • the light source 110 is disposed on the circuit board 150 and is electrically connected to the circuit board 150.
  • the light guiding component 120 has a light exiting portion 122 and at least one light incident portion 124 connected to the light exiting portion 122.
  • the light source 110 and the image capturing component 130 are located under the light exiting portion 122 , and the light source 110 is located beside the image capturing component 130 .
  • the light incident portion 124 is located between the light source 110 and the light exit portion 122.
  • the light incident portion 124 may be fixed to the circuit board 150, and the light incident portion 124 has a recess C.
  • the recess C and the circuit board 150 enclose a space in which the light source 110 is housed.
  • at least one of the light incident portion 124 and the circuit board 150 may have a recess (not shown) to accommodate the light source 110.
  • the light incident portion 124 and the circuit board 150 may be secured together by a securing mechanism (not shown) or an adhesive layer (not shown, such as an optical glue).
  • the light incident portion 124 may be fixed on the light source 110 by an adhesive layer (not shown, for example, an optical glue), and the light incident portion 124 may not be in contact with the circuit board 150.
  • FIG. 1 schematically shows two light incident portions 124, and the two light incident portions 124 are located on opposite sides of the light exit portion 122. However, the number and arrangement of the light incident portions 124 can be changed as needed, and is not limited thereto.
  • FIG. 2 is an enlarged view of the light guiding assembly of FIG. 1.
  • the light beam B emitted from the light source 110 enters the light guide unit 120 from the light incident portion 124 , and the light beam B can be transmitted to the light exit portion 122 via the light incident portion 124 .
  • the surface S of the light guiding component 120 facing the first collimator 140 can be selectively formed with a plurality of microstructures M (not shown in FIG. 1 , please refer to FIG. 2 ).
  • the microstructure M is adapted to change the direction of transmission of the beam B such that the beam B reflected by the microstructure M is directed perpendicularly or nearly perpendicularly out of the exit portion 122. As shown in FIG.
  • the microstructure M may protrude from the surface S and may have a first reflective surface S1 and a second reflective surface S2.
  • the first reflective surface S1 and the second reflective surface S2 are connected to each other, wherein the first reflective surface S1 and the second reflective surface S2 are inclined with respect to the surface S, and the oblique directions of the first reflective surface S1 and the second reflective surface S2 are opposite.
  • the microstructure M, the light exit portion 122, and the light incident portion 124 may be integrally formed, but not limited thereto.
  • the microstructures M, the light exiting portion 122, and the light incident portion 124 can be separately fabricated and fixed together by a connecting mechanism or an adhesive layer (for example, an optical adhesive).
  • the microstructure M can also be recessed into the surface S.
  • the microstructure M may be a depression formed on the surface S.
  • the number of microstructures M and their distribution may vary according to different needs, and are not limited to the number and distribution shown in FIG.
  • the surface S' of the light-emitting portion 122 outputting the light beam B is opposed to the surface S on which the microstructure M is formed.
  • the surface S' may be a pressing surface for pressing the object to be recognized 10.
  • TIR total internal reflection
  • the biometric device 100 may further include a cover plate 160 for the object 10 to be pressed.
  • the cover plate 160 is located above the light guide assembly 120 , and the light guide assembly 120 is located between the cover plate 160 and the first collimator 140 .
  • the cover plate 160 may be a cover lens of an electronic product to be assembled (for example, a touch panel or a touch display panel), but is not limited thereto.
  • the cover plate 160 and the light guide assembly 120 may be fixed together by a connecting mechanism or an adhesive layer (for example, an optical adhesive), but not limited thereto.
  • the refractive indices of the adhesive layer, the cover plate 160 and the light guiding component 120 may be the same or similar to reduce interface reflection, thereby improving the light utilization efficiency and/or image quality of the biometric device 100.
  • the refractive indices of the adhesive layer, cover plate 160, and light directing component 120 can also be different. Under the structure in which the cover plate 160 is disposed, the light beam B from the light source 110 sequentially passes through the light-emitting portion 122 and the cover plate 160 of the light-receiving portion 124, and total internal reflection occurs on the surface of the cover plate 160 where the object to be recognized 10 is pressed.
  • the light beam B' acting (e.g., diffused) by the object 10 to be identified passes through the cover plate 160 and the light exit portion 122 in sequence and is transmitted to the surface S.
  • a portion of the light beam B' transmitted to the surface S is reflected by the surface S, and is again transmitted toward the surface of the cover plate 160 where the object 10 is to be pressed.
  • another portion of the light beam B' delivered to the surface S will exit the light guide assembly 120 from the surface S.
  • the image capturing component 130 is located below the light guiding component 120 and has a plurality of pixel regions PR (shown in FIG. 4) arranged in an array to receive the light beam B′ acting through the object to be identified 10, thereby obtaining the to-be-identified Image of object 10.
  • the image capturing component 130 includes, for example, a plurality of Charge-Coupled Devices (CCDs) 132 (shown in FIG. 4).
  • the charge coupled assembly 132 is disposed on the circuit board 150 and is electrically coupled to the circuit board 150.
  • the area of the charge coupled component 132 is the pixel area PR of the image capture component 130.
  • the image capturing component 130 can include a plurality of complementary metal oxide semiconductors (CMOSs), and the region of the complementary metal oxide semiconductor is the pixel region PR of the image capturing component 130.
  • CMOSs complementary metal oxide semiconductors
  • the first collimator 140 is located between the light guiding component 120 and the image capturing component 130, and the first collimator 140 is located on the transmission path of the light beam B' after the object 10 is to be recognized.
  • the first collimator 140 can be disposed on the image capturing component 130, and the first collimator 140 and the image capturing component 130 can be fixed by a connecting mechanism or an adhesive layer (eg, optical glue). Together, but not limited to this.
  • 3A is a top plan view of the first collimating assembly of the first collimator of FIG. 1.
  • 3B is a top plan view of the second collimating assembly of the first collimator of FIG. 1.
  • 3C is a top plan view of the first collimating assembly of FIG. 3A and the second collimating assembly of FIG. 3B.
  • 4 is a cross-sectional view of the first collimator, the image capturing assembly, and the circuit board of FIG. 1.
  • the first collimator 140 includes a first collimating assembly 142 and a second collimating assembly 144 that overlaps the first collimating assembly 142 .
  • the second collimating assembly 144 is located between the first collimating assembly 142 and the image capturing assembly 130.
  • the position of the first collimating assembly 142 and the second collimating assembly 144 can also be reversed.
  • the first collimating component 142 and the second collimating component 144 may be fixed together by a connecting mechanism or an adhesive layer (for example, an optical adhesive), but not limited thereto.
  • the first collimating assembly 142 includes a plurality of first light absorbing assemblies B1 that are spaced apart.
  • the second collimating assembly 144 includes a plurality of second light absorbing assemblies B2 that are spaced apart.
  • the second light absorbing component B2 is interleaved with the first light absorbing component B1 to define a plurality of light transmitting regions TR.
  • the light transmitting region TR is overlapped with the pixel region PR.
  • the first collimating assembly 142 may further include a plurality of first light transmissive components T1.
  • the first light absorbing component B1 and the first light transmissive component T1 are alternately arranged and connected to each other. That is, the width W1 of the first light transmissive component T1 is the distance between the adjacent two first light absorbing components B1.
  • the first light absorbing component B1 and the first light transmissive component T1 may be alternately arranged along the first direction D1 and respectively extend along the second direction D2 intersecting the first direction D1.
  • the second direction D2 is, for example, perpendicular to the first direction D1, but is not limited thereto.
  • the second collimating assembly 144 can further include a plurality of second light transmissive components T2.
  • the second light absorbing component B2 and the second light transmissive component T2 are alternately arranged and connected to each other. That is, the width W2 of the second light transmissive component T2 is the phase The distance between the adjacent two second light absorbing assemblies B2.
  • the second light absorbing component B2 and the second light permeable component T2 may be alternately arranged in the second direction D2 and respectively extend along the first direction D1.
  • the arrangement and extension directions of the first light absorbing component B1 and the first light transmissive component T1 and the arrangement and extension directions of the second light absorbing component B2 and the second light transmissive component T2 are not limited to the above.
  • the arrangement and extension directions of the first light absorbing component B1 and the first light transmissive component T1 and the arrangement and extension directions of the second light absorbing component B2 and the second light transmissive component T2 may be reversed.
  • the arrangement direction of the first light absorbing component B1 and the first light permeable component T1 may be the same as the arrangement direction of the second light absorbing component B2 and the second light transmissive component T2, but the first light absorbing component B1 and the first light permeable component T1 are The extending direction is different from the extending direction of the second light absorbing component B2 and the second light transmitting component T2.
  • the first light transmissive component T1 and the second light transmissive component T2 may be omitted.
  • each of the light-transmitting regions TR is equal to the product of the distance between the adjacent two first light-absorbing members B1 and the distance between the adjacent two second light-absorbing members B2, and is also equal to the width W1 and the second of the first light-transmitting component T1.
  • the width W1 is equal to the width W2, but is not limited thereto.
  • the overlapping of the light-transmitting region TR in the pixel region PR means that the light-transmitting region TR can pass through the light beam B′ of the light-guiding component 120 and pass through the light-receiving component 120, and can be transmitted to the pixel region PR without being limited.
  • the size of the light area TR is greater than or equal to the pixel area PR.
  • the side length of the pixel region PR may be slightly larger than the width W1 of the first light transmissive component T1 and the width W2 of the second light transmissive component T2, but not limited thereto.
  • the second collimating component 144 is located between the first collimating component 142 and the image capturing component 130, the light beam B' acting through the object to be recognized 10 and passing through the light guiding component 120 passes through the first collimating component. After the action of 142 (e.g., collimation), it is again acted upon by the second collimating component 144 (e.g., collimation).
  • the refractive index of the light transmitting medium for example, air or optical glue
  • the light beam enters the first light transmissive component T1 via refraction at the light incident surface of the first light transmissive component T1.
  • the arrangement of the first light transmissive component T1 helps to converge the angle of the beam entering the first collimating component 142, thereby allowing more of the beam to pass through the first collimating component 142 and to the second collimating component 144.
  • the refractive index of the light transmission medium for example, air or optical glue
  • the light beam of the light transmissive component T2 enters the second light transmissive component T2 via refraction at the light incident surface of the second light transmissive component T2.
  • the arrangement of the second light transmissive component T2 helps to converge the angle of the beam entering the second collimating component 144, thereby allowing more of the beam to pass through the second collimating component 144 and to the image capturing component 130.
  • the material of the first light transmissive component T1 and the second light transmissive component T2 may be glass, polycarbonate (PC), polymethyl methacrylate (PMMA) or other suitable materials.
  • the material of the first light absorbing element B1 and the second light absorbing element B2 may be, for example, a silica gel type or an acrylic material containing a light absorbing material (for example, carbon).
  • the first light absorbing component B1 is adapted to converge the divergence angle of the light beam B′ in the arrangement direction of the first light absorbing component B1 (eg, the first direction D1)
  • the second light absorbing component B2 is adapted to converge the light beam B′ The divergence angle in the direction in which the two light absorbing members B2 are arranged (for example, the second direction D2).
  • the second light-absorbing component B2 is not located in the transmission path of the light beam B1 ′.
  • the light beam B1' is not absorbed by the second light absorbing component B2 but can be transmitted to the image capturing component 130.
  • the light beam B2' incident on the second light transmissive component T2 at a large angle is after entering the second light transmissive component T2 due to the second light absorbing component B2 is located on the transmission path of the beam B2', so that the beam B2' is absorbed by the second light absorbing component B2.
  • the transmission path of the light beam of the optical component may depend on the width of the light transmissive component (including the width W1 of the first light transmissive component T1 and the width W2 of the second light transmissive component T2), the height of the light transmissive component (including the first light transmission) The height H1 of the component T1 and the height H2 of the second light-transmitting component T2) and the angle of refraction of the light beam B' on the light-incident surface of the light-transmitting component (determined by the incident angle of the light beam B' and the refractive index of the light-transmitting component).
  • the larger the width of the light transmissive component the larger the angular range of the light beam B' received by the image capturing component 130.
  • the width of the light transmissive component is constant, the greater the height of the light transmissive component, the smaller the angular extent of the beam B' received by the image capturing component 130.
  • the width and height of the light-transmitting member are constant, the larger the angle of refraction of the light beam B' (i.e., the larger the incident angle), the more likely it is absorbed by the light-absorbing member.
  • the refractive indices of the first light transmissive component T1 and the second light transmissive component T2 are respectively greater than 1, and fall within a range of, for example, 1.3 to 1.7.
  • the width to height ratios of the first light transmissive component T1 and the second light transmissive component T2 fall within a range of 2 to 20, respectively.
  • the refractive index of the light transmissive component and the width to height ratio of the light transmissive component may vary depending on different design requirements (eg, the pitch of the image capturing component 130), and are not limited thereto.
  • a large-angle beam of light in different directions (for example, the first direction D1 and the second direction D2) of the light beam B' that acts through the light-receiving component 120 and passes through the light-guiding component 120 by the first light-absorbing component B1 and the second light-absorbing component B2
  • Absorption allows light beams of only a certain angle (light beams incident at a small angle) to be transmitted to the image capturing assembly 130.
  • the light beam B' passing through the first collimator 140 can be incident on the image capture assembly 130 at an angle of 0 degrees or near 0 degrees via appropriate modulation.
  • the first collimator 140 facilitates collimating the beam that is transmitted to the image capture assembly 130.
  • the biometric device 100 can have good recognition capabilities.
  • Biometric device 100 may also include other components depending on various needs.
  • biometric device 100 can also include a second collimator 170.
  • the second collimator 170 is located between the light guiding component 120 and the first collimator 140, and the second collimator 170 is located on the transmission path of the light beam B' after the object 10 is to be recognized.
  • the second collimator 170 can be disposed on the surface S, and the light guiding component 120 and the second collimator 170 can be fixed together by a connecting mechanism or an adhesive layer (eg, optical glue), but not This is limited to this.
  • the second collimator 170 is adapted to pre-align the beam B' before the beam B' passes through the first collimator 140 to converge the divergence angle of the beam B'. As such, the probability of subsequent passage of beam B' through first collimator 140 can be increased.
  • FIG. 5 is an enlarged view of the light guiding assembly and the second collimator of FIG. 1.
  • the second collimator 170 may include a plurality of prisms 172 , and the vertex angles TA of the prisms 172 refer to the light guide components 120 , respectively.
  • the angles of the two bottom corners BA of the respective prisms 172 are the same.
  • the apex angle TA and the bottom angle BA of the prism 172 may vary according to different needs, and are not limited thereto.
  • FIG. 6 is a cross-sectional view of a biometric device according to another embodiment of the present invention.
  • the biometric device 100A of FIG. 6 is similar to the biometric device 100 of FIG. 1, and the biometric device 100A has similar functions and advantages as the biometric device 100, and will not be repeated here.
  • the difference between the biometric device 100A of FIG. 6 and the biometric device 100 of FIG. 1 is that the position of the light source 110 is different.
  • the light source 110 is located on the side of the light guide assembly 120A.
  • the light guiding component 120A is, for example, a plate shape, and the light guiding component 120A can omit the light incident portion 124 of the light guiding component 120 of FIG. 1 .
  • the first light absorbing component and the second light absorbing component are used to absorb the large-angle light beams in different directions to collimate the light beam transmitted to the image capturing component. , to improve the image quality of the image capture component. Therefore, the biometric device can have good recognition capabilities.

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Abstract

A biometric identification device (100, 100A), comprising light sources (110), a light guide assembly (120, 120A), an image-capturing assembly (130) and a first collimator (140). The light sources (110) are suitable for providing light beams (B). The light guide assembly (120, 120A) is located on transmission paths of the light beams (B). The image-capturing assembly (130) is located beneath the light guide assembly (120, 120A), and is provided with a plurality of pixel regions (PR). The first collimator (140) is located between the light guide assembly (120, 120A) and the image-capturing assembly (130), and comprises a first collimation assembly (142) and a second collimation assembly (144). The first collimation assembly (142) comprises a plurality of first light-absorbing assemblies (B1) arranged at intervals. The second collimation assembly (144) overlaps with the first collimation assembly (142), and comprises a plurality of second light-absorbing assemblies (B2) arranged at intervals. The second light-absorbing assemblies (B2) and the first light-absorbing assemblies (B1) intersect to define a plurality of light-transmitting regions (TR) overlapping with the pixel regions (PR). The first light-absorbing assemblies (B1) and the second light-absorbing assemblies (B2) absorb large angle light beams (B') in different directions, so that the light beams (B') transmitted to the image-capturing assembly (130) are collimated, thus improving the image-capturing quality of the image-capturing assembly (130). Therefore, the biometric identification device (100, 100A) has a good identification capability.

Description

生物特征辨识装置Biometric identification device 技术领域Technical field
本发明涉及一种生物特征辨识装置。The invention relates to a biometric identification device.
背景技术Background technique
生物特征辨识的种类包括脸部、声音、虹膜、视网膜、静脉、指纹和掌纹辨识等。由于每个人的指纹都是独一无二的，且指纹不易随着年龄或身体健康状况而变化，因此指纹辨识装置已成为目前最普及的一种生物特征辨识装置。依照感测方式的不同，指纹辨识装置可分为光学式与电容式。电容式指纹辨识装置组装于电子产品(例如：手机、平板计算机)时，电容式指纹辨识装置上方多设有保护组件(cover lens)。一般而言，需额外加工(例如钻孔或薄化)保护组件，以使电容式指纹辨识装置能够感测到手指触碰所造成的容值或电场变化。The types of biometrics include face, sound, iris, retina, vein, fingerprint, and palmprint recognition. Since each person's fingerprint is unique and the fingerprint is not easy to change with age or physical health, the fingerprint identification device has become the most popular biometric identification device. According to the different sensing methods, the fingerprint identification device can be divided into optical and capacitive. When the capacitive fingerprint identification device is assembled in an electronic product (for example, a mobile phone or a tablet computer), a cover lens is disposed above the capacitive fingerprint identification device. In general, additional processing (eg, drilling or thinning) of the protective component is required to enable the capacitive fingerprinting device to sense a change in capacitance or electric field caused by a finger touch.
相较于电容式指纹辨识装置，光学式指纹辨识装置撷取容易穿透保护组件的光进行指纹辨识，而可以不用额外加工保护组件，因此在与电子产品的结合上较为便利。Compared with the capacitive fingerprint identification device, the optical fingerprint identification device captures light that easily penetrates the protection component for fingerprint recognition, and can eliminate the need for additional processing of the protection component, thereby facilitating the combination with the electronic product.
光学式指纹辨识装置通常包括光源、影像撷取组件及透光组件。光源用以发出光束，以照射按压在透光组件上的手指。手指的指纹是由多条不规则的凸纹与凹纹所组成。被凸纹与凹纹反射的光束会在影像撷取组件的接收面上形成为明暗交错的指纹影像。影像撷取组件可将指纹影像转换为对应的影像信息，并将影像信息输入至处理单元。处理单元可利用算法计算对应于指纹的影像信息，以进行用户的身份辨识。然而，在上述的取像过程中，被指纹反射的光束易散乱地传递至影像撷取组件，而造成取像质量不佳，影响辨识结果。The optical fingerprint identification device generally includes a light source, an image capturing component, and a light transmitting component. The light source is used to emit a light beam to illuminate a finger pressed against the light transmissive component. Finger fingerprints are made up of a number of irregular ridges and indentations. The beams reflected by the ridges and the indentations are formed as a fingerprint image of the light and dark interlaced on the receiving surface of the image capturing assembly. The image capturing component can convert the fingerprint image into corresponding image information and input the image information into the processing unit. The processing unit may use an algorithm to calculate image information corresponding to the fingerprint for identification of the user. However, in the above image capturing process, the light beam reflected by the fingerprint is easily transmitted to the image capturing component, which results in poor image quality and affects the identification result.
发明内容Summary of the invention
本发明提供一种生物特征辨识装置。The invention provides a biometric identification device.
根据本发明的实施例，生物特征辨识装置包括光源、导光组件、影像撷取组件以及第一准直器。光源适于提供光束。导光组件位于光束的传递路径上。影像撷取组件位于导光组件下方且具有多个像素区。第一准直器位于导光组件与影像撷取组件之间，其中第一准直器包括第一准直组件以及第二准直组件。第一准直组件包括间隔排列的多个第一吸光组件。第二准直组件重叠于第一准直组件且包括间隔排列的多个第二吸光组件。第二吸光组件与第一吸光组件交错而定义出多个透光区。透光区重叠于像素区。According to an embodiment of the invention, the biometric device comprises a light source, a light guiding component, an image capturing component and a first collimator. The light source is adapted to provide a light beam. The light guiding component is located on the transmission path of the light beam. The image capture component is located below the light guide component and has a plurality of pixel regions. The first collimator is located between the light guiding component and the image capturing component, wherein the first collimator comprises a first collimating component and a second collimating component. The first collimating assembly includes a plurality of first light absorbing assemblies spaced apart. The second collimating assembly overlaps the first collimating assembly and includes a plurality of second light absorbing assemblies spaced apart. The second light absorbing component is interleaved with the first light absorbing component to define a plurality of light transmissive regions. The light transmissive area overlaps the pixel area.
在根据本发明的实施例的生物特征辨识装置中，导光组件具有出光部以及连接于出光部的入光部。光源与影像撷取组件共同位于出光部下方。入光部位于光源与出光部之间。In the biometrics device according to the embodiment of the present invention, the light guiding member has a light exiting portion and a light incident portion connected to the light exiting portion. The light source and the image capturing component are located below the light exiting portion. The light incident portion is located between the light source and the light exit portion.
在根据本发明的实施例的生物特征辨识装置中，光源位于导光组件的侧面。In the biometric device according to an embodiment of the present invention, the light source is located at a side of the light guiding assembly.
在根据本发明的实施例的生物特征辨识装置中，导光组件面向第一准直器的表面形成有多个微结构。微结构凸出或凹入于表面。In the biometrics device according to an embodiment of the present invention, the light guiding member is formed with a plurality of microstructures facing the surface of the first collimator. The microstructure is convex or concave on the surface.
在根据本发明的实施例的生物特征辨识装置中，第一准直组件还包括多个第一透光组件。第一吸光组件以及第一透光组件交替排列且相互连接。第二准直组件还包括多个第二 透光组件。第二吸光组件以及第二透光组件交替排列且相互连接。第一透光组件以及第二透光组件的折射率分别大于1。In the biometric device according to an embodiment of the present invention, the first collimating assembly further includes a plurality of first light transmissive components. The first light absorbing component and the first light transmitting component are alternately arranged and connected to each other. The second collimating assembly further includes a plurality of second Light transmissive component. The second light absorbing component and the second light permeable component are alternately arranged and connected to each other. The refractive indices of the first light transmissive component and the second light transmissive component are each greater than 1.
在根据本发明的实施例的生物特征辨识装置中，第一透光组件以及第二透光组件的折射率分别落在1.3至1.7的范围内。In the biometrics device according to the embodiment of the present invention, the refractive indices of the first light transmissive component and the second light transmissive component fall within a range of 1.3 to 1.7, respectively.
在根据本发明的实施例的生物特征辨识装置中，第一透光组件以及第二透光组件的宽度与高度比分别落在2至20的范围内。In the biometrics identification apparatus according to the embodiment of the present invention, the width and height ratios of the first light transmissive component and the second light transmissive component fall within a range of 2 to 20, respectively.
在根据本发明的实施例的生物特征辨识装置中，第一吸光组件以及第一透光组件沿第一方向交替排列且分别沿与第一方向相交的第二方向延伸。第二吸光组件以及第二透光组件沿第二方向交替排列且分别沿第一方向延伸。In the biometrics device according to an embodiment of the present invention, the first light absorbing member and the first light permeable member are alternately arranged in the first direction and respectively extend in a second direction intersecting the first direction. The second light absorbing component and the second light permeable component are alternately arranged in the second direction and respectively extend in the first direction.
在根据本发明的实施例的生物特征辨识装置中，生物特征辨识装置还包括盖板，其中导光组件位于盖板与第一准直器之间。In the biometric device according to an embodiment of the present invention, the biometric device further includes a cover plate, wherein the light guide assembly is located between the cover plate and the first collimator.
在根据本发明的实施例的生物特征辨识装置中，生物特征辨识装置还包括第二准直器。第二准直器位于导光组件与第一准直器之间且包括多个棱镜。棱镜的顶角指向导光组件。In the biometric device according to an embodiment of the present invention, the biometric device further includes a second collimator. The second collimator is located between the light guide assembly and the first collimator and includes a plurality of prisms. The apex angle of the prism refers to the light guide assembly.
基于上述，在本发明的实施例的生物特征辨识装置中，利用第一吸光组件以及第二吸光组件吸收不同方向上的大角度光束，以将传递至影像撷取组件的光束准直化，使影像撷取组件的取像质量提升。因此，生物特征辨识装置可具有良好的辨识能力。Based on the above, in the biometric device of the embodiment of the present invention, the first light absorbing component and the second light absorbing component are used to absorb the large-angle light beams in different directions to collimate the light beam transmitted to the image capturing component, so that The image capture component's image quality is improved. Therefore, the biometric device can have good recognition capabilities.
附图说明DRAWINGS
包含附图以便进一步理解本发明，且附图并入本说明书中并构成本说明书的一部分。附图说明本发明的实施例，并与描述一起用于解释本发明的原理。The drawings are included to provide a further understanding of the invention, and the drawings are incorporated in the specification. The drawings illustrate embodiments of the invention and, together with
图1为本发明一实施例的生物特征辨识装置的剖面示意图；1 is a schematic cross-sectional view of a biometric device according to an embodiment of the present invention;
图2为图1中导光组件的一种放大图；Figure 2 is an enlarged view of the light guiding assembly of Figure 1;
图3A为图1中第一准直器的第一准直组件的一种俯视示意图；3A is a top plan view of the first collimating assembly of the first collimator of FIG. 1;
图3B为图1中第一准直器的第二准直组件的一种俯视示意图；3B is a top plan view of the second collimating assembly of the first collimator of FIG. 1;
图3C为图3A的第一准直组件以及图3B的第二准直组件的一种俯视示意图；3C is a top plan view of the first collimating assembly of FIG. 3A and the second collimating assembly of FIG. 3B;
图4为图1中第一准直器、影像撷取组件以及电路板的一种剖面示意图；4 is a cross-sectional view of the first collimator, the image capturing assembly, and the circuit board of FIG. 1;
图5为图1中导光组件以及第二准直器的一种放大图；Figure 5 is an enlarged view of the light guiding assembly and the second collimator of Figure 1;
图6为本发明另一实施例的生物特征辨识装置的剖面示意图。FIG. 6 is a cross-sectional view of a biometric device according to another embodiment of the present invention.
附图标号说明Description of the reference numerals
10：待辨识物；10: the object to be identified;
100、100A：生物特征辨识装置；100, 100A: biometric identification device;
110：光源；110: a light source;
112：发光组件；112: a light emitting component;
120、120A：导光组件；120, 120A: light guiding component;
122：出光部；122: light exiting department;
124：入光部；124: entering the light department;
130：影像撷取组件；130: an image capturing component;
132：电荷耦合组件； 132: a charge coupled component;
140：第一准直器；140: a first collimator;
142：第一准直组件；142: a first collimating component;
144：第二准直组件；144: a second collimating component;
150：电路板；150: circuit board;
160：盖板；160: cover plate;
170：第二准直器；170: a second collimator;
172：棱镜；172: prism;
B、B’、B1’、B2’：光束；B, B', B1', B2': light beam;
B1：第一吸光组件；B1: a first light absorbing component;
B2：第二吸光组件；B2: a second light absorbing component;
BA：底角；BA: bottom corner;
C：凹陷；C: depression;
D1：第一方向；D1: the first direction;
D2：第二方向；D2: the second direction;
H1、H2：高度；H1, H2: height;
M：微结构；M: microstructure;
PR：像素区；PR: pixel area;
S、S’：表面；S, S': surface;
S1：第一反射面；S1: a first reflecting surface;
S2：第二反射面；S2: a second reflecting surface;
S144：入光面；S144: entering the light surface;
T1：第一透光组件；T1: a first light transmissive component;
T2：第二透光组件；T2: a second light transmissive component;
TA：顶角；TA: top angle;
TR：透光区；TR: light transmitting area;
W1、W2：宽度。W1, W2: width.
具体实施方式detailed description
现将详细地参考本发明的示范性实施例，示范性实施例的实例说明于附图中。只要有可能，相同组件符号在附图和描述中用来表示相同或相似部分。Reference will now be made in detail to the exemplary embodiments embodiments Whenever possible, the same component symbols are used in the drawings and description to refer to the same or similar parts.
图1为本发明一实施例的生物特征辨识装置的剖面示意图。请参照图1，生物特征辨识装置100例如为指纹辨识装置，用以辨识待辨识物10的指纹，但不以此为限。在另一实施例中，生物特征辨识装置100也可用以辨识静脉、掌纹或是指纹、静脉以及掌纹的其中至少两个的组合。1 is a schematic cross-sectional view of a biometric device according to an embodiment of the present invention. Referring to FIG. 1 , the biometric device 100 is, for example, a fingerprint identification device for identifying the fingerprint of the object 10 to be identified, but is not limited thereto. In another embodiment, the biometric device 100 can also be used to identify a combination of at least two of a vein, a palm print, or a fingerprint, a vein, and a palm print.
生物特征辨识装置100包括光源110、导光组件120、影像撷取组件130以及第一准直器140。The biometric device 100 includes a light source 110, a light guiding component 120, an image capturing component 130, and a first collimator 140.
光源110适于提供光束B。光源110可以是非可见光光源或可见光光源。也就是说，光束B可以是不可见光(例如：红外光)或可见光(例如：红光、蓝光、绿光或其组合)。或者，光源110可以是非可见光光源与可见光光源的组合。举例而言，光源110可包括多 个发光组件112。发光组件112可为发光二极管或其他适当种类的发光组件。图1示意地显示出两个发光组件112，且两个发光组件112位于影像撷取组件130的相对侧。然而，发光组件112的数量以及配置方式可依需求改变，而不以此为限。 Light source 110 is adapted to provide beam B. Light source 110 can be a non-visible light source or a visible light source. That is, the light beam B may be invisible light (eg, infrared light) or visible light (eg, red light, blue light, green light, or a combination thereof). Alternatively, light source 110 can be a combination of a non-visible light source and a visible light source. For example, the light source 110 can include multiple Light emitting components 112. Light emitting component 112 can be a light emitting diode or other suitable type of light emitting component. FIG. 1 schematically shows two lighting assemblies 112 with two lighting assemblies 112 on opposite sides of the image capturing assembly 130. However, the number and arrangement of the light-emitting components 112 can be changed as needed, and is not limited thereto.
导光组件120位于光束B的传递路径上，其适于将光源110提供的光束B导向待辨识物10。举例而言，导光组件110的材质可为玻璃、聚碳酸酯(PC)、聚甲基丙烯酸甲酯(PMMA)或其他适当材料。在本实施例中，光源110与影像撷取组件130位于导光组件120的同一侧。生物特征辨识装置100进一步包括电路板150。光源110配置在电路板150上且与电路板150电连接。导光组件120具有出光部122以及连接于出光部122的至少一入光部124。光源110与影像撷取组件130共同位于出光部122下方，且光源110位于影像撷取组件130旁。入光部124位于光源110与出光部122之间。详细而言，入光部124可固定在电路板150上，且入光部124具有凹陷C。凹陷C与电路板150围出容纳光源110的空间。在另一实施例中，入光部124与电路板150的其中至少一个可具有凹陷(未示出)，以容纳光源110。在又一实施例中，入光部124与电路板150可借由固定机构(未示出)或黏着层(未示出，例如：光学胶)固定在一起。在再一实施例中，入光部124可借由黏着层(未示出，例如：光学胶)而固定在光源110上，且入光部124可不与电路板150接触。图1示意地显示出两个入光部124，且两个入光部124位在出光部122的相对侧。然而，入光部124的数量以及配置方式可依需求改变，而不以此为限。The light guiding component 120 is located on the transmission path of the light beam B, and is adapted to direct the light beam B provided by the light source 110 to the object to be recognized 10. For example, the material of the light guiding component 110 can be glass, polycarbonate (PC), polymethyl methacrylate (PMMA) or other suitable materials. In this embodiment, the light source 110 and the image capturing component 130 are located on the same side of the light guiding component 120. The biometric device 100 further includes a circuit board 150. The light source 110 is disposed on the circuit board 150 and is electrically connected to the circuit board 150. The light guiding component 120 has a light exiting portion 122 and at least one light incident portion 124 connected to the light exiting portion 122. The light source 110 and the image capturing component 130 are located under the light exiting portion 122 , and the light source 110 is located beside the image capturing component 130 . The light incident portion 124 is located between the light source 110 and the light exit portion 122. In detail, the light incident portion 124 may be fixed to the circuit board 150, and the light incident portion 124 has a recess C. The recess C and the circuit board 150 enclose a space in which the light source 110 is housed. In another embodiment, at least one of the light incident portion 124 and the circuit board 150 may have a recess (not shown) to accommodate the light source 110. In still another embodiment, the light incident portion 124 and the circuit board 150 may be secured together by a securing mechanism (not shown) or an adhesive layer (not shown, such as an optical glue). In still another embodiment, the light incident portion 124 may be fixed on the light source 110 by an adhesive layer (not shown, for example, an optical glue), and the light incident portion 124 may not be in contact with the circuit board 150. FIG. 1 schematically shows two light incident portions 124, and the two light incident portions 124 are located on opposite sides of the light exit portion 122. However, the number and arrangement of the light incident portions 124 can be changed as needed, and is not limited thereto.
图2为图1中导光组件的一种放大图。请参照图1及图2，光源110射出的光束B自入光部124进入导光组件120，且光束B可经由入光部124传递至出光部122。导光组件120面向第一准直器140的表面S可选择性地形成有多个微结构M(图1未示出，请参照图2)。微结构M适于改变光束B的传递方向，使得被微结构M反射的光束B垂直或接近垂地直射出出光部122。如图2所示，微结构M可凸出于表面S且可具有第一反射面S1以及第二反射面S2。第一反射面S1与第二反射面S2彼此相连，其中第一反射面S1与第二反射面S2相对于表面S倾斜，且第一反射面S1与第二反射面S2的倾斜方向相反。在一实施例中，微结构M、出光部122以及入光部124可一体成型，但不以此为限。在另一实施例中，微结构M、出光部122以及入光部124可分别制作，再借由连接机构或黏着层(例如：光学胶)固定在一起。或者，微结构M也可凹入于表面S。具体地，微结构M可以是形成在表面S上的凹陷。另外，微结构M的数量及其分布可依据不同的需求改变，而不限于图2所显示的数量及分布。2 is an enlarged view of the light guiding assembly of FIG. 1. Referring to FIGS. 1 and 2 , the light beam B emitted from the light source 110 enters the light guide unit 120 from the light incident portion 124 , and the light beam B can be transmitted to the light exit portion 122 via the light incident portion 124 . The surface S of the light guiding component 120 facing the first collimator 140 can be selectively formed with a plurality of microstructures M (not shown in FIG. 1 , please refer to FIG. 2 ). The microstructure M is adapted to change the direction of transmission of the beam B such that the beam B reflected by the microstructure M is directed perpendicularly or nearly perpendicularly out of the exit portion 122. As shown in FIG. 2, the microstructure M may protrude from the surface S and may have a first reflective surface S1 and a second reflective surface S2. The first reflective surface S1 and the second reflective surface S2 are connected to each other, wherein the first reflective surface S1 and the second reflective surface S2 are inclined with respect to the surface S, and the oblique directions of the first reflective surface S1 and the second reflective surface S2 are opposite. In one embodiment, the microstructure M, the light exit portion 122, and the light incident portion 124 may be integrally formed, but not limited thereto. In another embodiment, the microstructures M, the light exiting portion 122, and the light incident portion 124 can be separately fabricated and fixed together by a connecting mechanism or an adhesive layer (for example, an optical adhesive). Alternatively, the microstructure M can also be recessed into the surface S. Specifically, the microstructure M may be a depression formed on the surface S. In addition, the number of microstructures M and their distribution may vary according to different needs, and are not limited to the number and distribution shown in FIG.
出光部122输出光束B的表面S’与形成有微结构M的表面S相对。在一实施例中，表面S’可以是供待辨识物10按压的按压面。在表面S’为按压面的架构下，如图2所示，来自光源110的光束B依序通过入光部124以及出光部122，并在表面S’发生全内反射(Total Internal Reflection,TIR)，接着依序被第二反射面S2以及第一反射面S1反射，并垂直或接近垂直地射出表面S’。The surface S' of the light-emitting portion 122 outputting the light beam B is opposed to the surface S on which the microstructure M is formed. In an embodiment, the surface S' may be a pressing surface for pressing the object to be recognized 10. Under the structure in which the surface S' is a pressing surface, as shown in FIG. 2, the light beam B from the light source 110 sequentially passes through the light incident portion 124 and the light exit portion 122, and total internal reflection (TIR) occurs on the surface S'. Then, it is sequentially reflected by the second reflecting surface S2 and the first reflecting surface S1, and the surface S' is emitted vertically or nearly vertically.
或者，如图1所示，生物特征辨识装置100可进一步包括盖板160以供待辨识物10按压。盖板160位于导光组件120上方，且导光组件120位于盖板160与第一准直器140之间。盖板160可以是所欲组装的电子产品(例如：触控面板或触控显示面板)的保护组件(cover lens)，但不以此为限。在一实施例中，盖板160与导光组件120可借由连接机构或黏着层(例如：光学胶)而固定在一起，但不以此为限。以黏着层固定盖板160与导 光组件120的情况下，黏着层、盖板160与导光组件120的折射率可相同或相近，以减少接口反射，进而提升生物特征辨识装置100的光利用效率和/或取像质量。然而，在其他实施例中，黏着层、盖板160与导光组件120的折射率也可相异。在设置盖板160的架构下，来自光源110的光束B依序通过入光部124出光部122以及盖板160，并在盖板160供待辨识物10按压的表面发生全内反射。经待辨识物10作用(例如：漫射)的光束B’依序通过盖板160以及出光部122并传递至表面S。传递至表面S的光束B’的一部分会被表面S反射，而再次朝盖板160供待辨识物10按压的表面传递。另一方面，传递至表面S的光束B’的另一部分会自表面S射出导光组件120。Alternatively, as shown in FIG. 1, the biometric device 100 may further include a cover plate 160 for the object 10 to be pressed. The cover plate 160 is located above the light guide assembly 120 , and the light guide assembly 120 is located between the cover plate 160 and the first collimator 140 . The cover plate 160 may be a cover lens of an electronic product to be assembled (for example, a touch panel or a touch display panel), but is not limited thereto. In an embodiment, the cover plate 160 and the light guide assembly 120 may be fixed together by a connecting mechanism or an adhesive layer (for example, an optical adhesive), but not limited thereto. Fixing the cover plate 160 with the adhesive layer In the case of the optical component 120, the refractive indices of the adhesive layer, the cover plate 160 and the light guiding component 120 may be the same or similar to reduce interface reflection, thereby improving the light utilization efficiency and/or image quality of the biometric device 100. However, in other embodiments, the refractive indices of the adhesive layer, cover plate 160, and light directing component 120 can also be different. Under the structure in which the cover plate 160 is disposed, the light beam B from the light source 110 sequentially passes through the light-emitting portion 122 and the cover plate 160 of the light-receiving portion 124, and total internal reflection occurs on the surface of the cover plate 160 where the object to be recognized 10 is pressed. The light beam B' acting (e.g., diffused) by the object 10 to be identified passes through the cover plate 160 and the light exit portion 122 in sequence and is transmitted to the surface S. A portion of the light beam B' transmitted to the surface S is reflected by the surface S, and is again transmitted toward the surface of the cover plate 160 where the object 10 is to be pressed. On the other hand, another portion of the light beam B' delivered to the surface S will exit the light guide assembly 120 from the surface S.
影像撷取组件130位于导光组件120下方且具有例如呈数组排列的多个像素(pixel)区PR(显示于图4)，以接收经待辨识物10作用的光束B’，进而取得待辨识物10的影像。在本实施例中，影像撷取组件130例如包括多个电荷耦合组件(Charge-Coupled Device,CCD)132(显示于图4)。电荷耦合组件132配置于电路板150上并与电路板150电连接。电荷耦合组件132的所在区域为影像撷取组件130的像素区PR。在另一实施例中，影像撷取组件130可包括多个互补金属氧化物半导体(Complementary Metal Oxide Semiconductor,CMOS)，且互补金属氧化物半导体的所在区域为影像撷取组件130的像素区PR。The image capturing component 130 is located below the light guiding component 120 and has a plurality of pixel regions PR (shown in FIG. 4) arranged in an array to receive the light beam B′ acting through the object to be identified 10, thereby obtaining the to-be-identified Image of object 10. In the present embodiment, the image capturing component 130 includes, for example, a plurality of Charge-Coupled Devices (CCDs) 132 (shown in FIG. 4). The charge coupled assembly 132 is disposed on the circuit board 150 and is electrically coupled to the circuit board 150. The area of the charge coupled component 132 is the pixel area PR of the image capture component 130. In another embodiment, the image capturing component 130 can include a plurality of complementary metal oxide semiconductors (CMOSs), and the region of the complementary metal oxide semiconductor is the pixel region PR of the image capturing component 130.
第一准直器140位于导光组件120与影像撷取组件130之间，且第一准直器140位于待辨识物10作用后的光束B’的传递路径上。举例而言，第一准直器140可配置在影像撷取组件130上，且第一准直器140与影像撷取组件130可借由连接机构或黏着层(例如：光学胶)而固定在一起，但不以此为限。The first collimator 140 is located between the light guiding component 120 and the image capturing component 130, and the first collimator 140 is located on the transmission path of the light beam B' after the object 10 is to be recognized. For example, the first collimator 140 can be disposed on the image capturing component 130, and the first collimator 140 and the image capturing component 130 can be fixed by a connecting mechanism or an adhesive layer (eg, optical glue). Together, but not limited to this.
图3A为图1中第一准直器的第一准直组件的一种俯视示意图。图3B为图1中第一准直器的第二准直组件的一种俯视示意图。图3C为图3A的第一准直组件以及图3B的第二准直组件的一种俯视示意图。图4为图1中第一准直器、影像撷取组件以及电路板的一种剖面示意图。3A is a top plan view of the first collimating assembly of the first collimator of FIG. 1. 3B is a top plan view of the second collimating assembly of the first collimator of FIG. 1. 3C is a top plan view of the first collimating assembly of FIG. 3A and the second collimating assembly of FIG. 3B. 4 is a cross-sectional view of the first collimator, the image capturing assembly, and the circuit board of FIG. 1.
请参照图1、图3A至图4，第一准直器140包括第一准直组件142以及重叠于第一准直组件142的第二准直组件144。在本实施例中，第二准直组件144位于第一准直组件142与影像撷取组件130之间。然而，第一准直组件142与第二准直组件144的位置也可颠倒。此外，第一准直组件142以及第二准直组件144可借由连接机构或黏着层(例如：光学胶)而固定在一起，但不以此为限。Referring to FIGS. 1 , 3A-4 , the first collimator 140 includes a first collimating assembly 142 and a second collimating assembly 144 that overlaps the first collimating assembly 142 . In the present embodiment, the second collimating assembly 144 is located between the first collimating assembly 142 and the image capturing assembly 130. However, the position of the first collimating assembly 142 and the second collimating assembly 144 can also be reversed. In addition, the first collimating component 142 and the second collimating component 144 may be fixed together by a connecting mechanism or an adhesive layer (for example, an optical adhesive), but not limited thereto.
第一准直组件142包括间隔排列的多个第一吸光组件B1。第二准直组件144包括间隔排列的多个第二吸光组件B2。第二吸光组件B2与第一吸光组件B1交错而定义出多个透光区TR。透光区TR重叠于像素区PR。The first collimating assembly 142 includes a plurality of first light absorbing assemblies B1 that are spaced apart. The second collimating assembly 144 includes a plurality of second light absorbing assemblies B2 that are spaced apart. The second light absorbing component B2 is interleaved with the first light absorbing component B1 to define a plurality of light transmitting regions TR. The light transmitting region TR is overlapped with the pixel region PR.
在本实施例中，第一准直组件142可进一步包括多个第一透光组件T1。第一吸光组件B1以及第一透光组件T1交替排列且相互连接。也就是说，第一透光组件T1的宽度W1即为相邻两第一吸光组件B1之间的距离。举例而言，第一吸光组件B1以及第一透光组件T1可沿第一方向D1交替排列且分别沿与第一方向D1相交的第二方向D2延伸。第二方向D2例如垂直于第一方向D1，但不以此为限。In this embodiment, the first collimating assembly 142 may further include a plurality of first light transmissive components T1. The first light absorbing component B1 and the first light transmissive component T1 are alternately arranged and connected to each other. That is, the width W1 of the first light transmissive component T1 is the distance between the adjacent two first light absorbing components B1. For example, the first light absorbing component B1 and the first light transmissive component T1 may be alternately arranged along the first direction D1 and respectively extend along the second direction D2 intersecting the first direction D1. The second direction D2 is, for example, perpendicular to the first direction D1, but is not limited thereto.
同样地，第二准直组件144可进一步包括多个第二透光组件T2。第二吸光组件B2以及第二透光组件T2交替排列且相互连接。也就是说，第二透光组件T2的宽度W2即为相 邻两第二吸光组件B2之间的距离。举例而言，第二吸光组件B2以及第二透光组件T2可沿第二方向D2交替排列且分别沿第一方向D1延伸。Likewise, the second collimating assembly 144 can further include a plurality of second light transmissive components T2. The second light absorbing component B2 and the second light transmissive component T2 are alternately arranged and connected to each other. That is, the width W2 of the second light transmissive component T2 is the phase The distance between the adjacent two second light absorbing assemblies B2. For example, the second light absorbing component B2 and the second light permeable component T2 may be alternately arranged in the second direction D2 and respectively extend along the first direction D1.
应说明的是，第一吸光组件B1以及第一透光组件T1的排列及延伸方向以及第二吸光组件B2以及第二透光组件T2的排列及延伸方向不以上述为限。举例而言，第一吸光组件B1以及第一透光组件T1的排列及延伸方向以及第二吸光组件B2以及第二透光组件T2的排列及延伸方向可颠倒。或者，第一吸光组件B1以及第一透光组件T1的排列方向可与第二吸光组件B2以及第二透光组件T2的排列方向相同，但第一吸光组件B1以及第一透光组件T1的延伸方向不同于第二吸光组件B2以及第二透光组件T2的延伸方向。在一实施例中，可省略第一透光组件T1以及第二透光组件T2。It should be noted that the arrangement and extension directions of the first light absorbing component B1 and the first light transmissive component T1 and the arrangement and extension directions of the second light absorbing component B2 and the second light transmissive component T2 are not limited to the above. For example, the arrangement and extension directions of the first light absorbing component B1 and the first light transmissive component T1 and the arrangement and extension directions of the second light absorbing component B2 and the second light transmissive component T2 may be reversed. Alternatively, the arrangement direction of the first light absorbing component B1 and the first light permeable component T1 may be the same as the arrangement direction of the second light absorbing component B2 and the second light transmissive component T2, but the first light absorbing component B1 and the first light permeable component T1 are The extending direction is different from the extending direction of the second light absorbing component B2 and the second light transmitting component T2. In an embodiment, the first light transmissive component T1 and the second light transmissive component T2 may be omitted.
各透光区TR的面积等于相邻两第一吸光组件B1之间的距离与相邻两第二吸光组件B2之间的距离的乘积，也等于第一透光组件T1的宽度W1与第二透光组件T2的宽度W2的乘积。在图3A至图3C中，宽度W1等于宽度W2，但不以此为限。所述透光区TR重叠于像素区PR是指透光区TR可让经待辨识物10作用且通过导光组件120的光束B’通过，而能够传递至像素区PR，而不用以限定透光区TR的尺寸大于或等于像素区PR。在本实施例中，像素区PR的边长可略大于第一透光组件T1的宽度W1以及第二透光组件T2的宽度W2，但不以此为限。The area of each of the light-transmitting regions TR is equal to the product of the distance between the adjacent two first light-absorbing members B1 and the distance between the adjacent two second light-absorbing members B2, and is also equal to the width W1 and the second of the first light-transmitting component T1. The product of the width W2 of the light transmissive component T2. In FIGS. 3A to 3C, the width W1 is equal to the width W2, but is not limited thereto. The overlapping of the light-transmitting region TR in the pixel region PR means that the light-transmitting region TR can pass through the light beam B′ of the light-guiding component 120 and pass through the light-receiving component 120, and can be transmitted to the pixel region PR without being limited. The size of the light area TR is greater than or equal to the pixel area PR. In this embodiment, the side length of the pixel region PR may be slightly larger than the width W1 of the first light transmissive component T1 and the width W2 of the second light transmissive component T2, but not limited thereto.
在第二准直组件144位于第一准直组件142与影像撷取组件130之间的架构下，经待辨识物10作用且通过导光组件120的光束B’会先经过第一准直组件142的作用(例如：准直化)之后，再被第二准直组件144作用(例如：准直化)。当导光组件120与第一准直器140之间的光传递介质(例如：空气或光学胶)的折射率不同于第一透光组件T1的折射率时，入射第一透光组件T1的光束会在第一透光组件T1的入光面经由折射而进入第一透光组件T1。因此，第一透光组件T1的设置有助于收敛进入第一准直组件142的光束的角度，进而让更多的光束能够通过第一准直组件142并传递至第二准直组件144。同样地，当第一准直组件142与第二准直组件144之间的光传递介质(例如：空气或光学胶)的折射率不同于第二透光组件T2的折射率时，入射第二透光组件T2的光束会在第二透光组件T2的入光面经由折射而进入第二透光组件T2。因此，第二透光组件T2的设置有助于收敛进入第二准直组件144的光束的角度，进而让更多的光束能够通过第二准直组件144并传递至影像撷取组件130。Under the structure that the second collimating component 144 is located between the first collimating component 142 and the image capturing component 130, the light beam B' acting through the object to be recognized 10 and passing through the light guiding component 120 passes through the first collimating component. After the action of 142 (e.g., collimation), it is again acted upon by the second collimating component 144 (e.g., collimation). When the refractive index of the light transmitting medium (for example, air or optical glue) between the light guiding component 120 and the first collimator 140 is different from the refractive index of the first light transmitting component T1, the first light transmitting component T1 is incident. The light beam enters the first light transmissive component T1 via refraction at the light incident surface of the first light transmissive component T1. Thus, the arrangement of the first light transmissive component T1 helps to converge the angle of the beam entering the first collimating component 142, thereby allowing more of the beam to pass through the first collimating component 142 and to the second collimating component 144. Similarly, when the refractive index of the light transmission medium (for example, air or optical glue) between the first collimating component 142 and the second collimating component 144 is different from the refractive index of the second light transmissive component T2, the second is incident. The light beam of the light transmissive component T2 enters the second light transmissive component T2 via refraction at the light incident surface of the second light transmissive component T2. Thus, the arrangement of the second light transmissive component T2 helps to converge the angle of the beam entering the second collimating component 144, thereby allowing more of the beam to pass through the second collimating component 144 and to the image capturing component 130.
第一透光组件T1以及第二透光组件T2的材质可采用玻璃、聚碳酸酯(PC)、聚甲基丙烯酸甲酯(PMMA)或其他适当材料。第一吸光组件B1以及第二吸光组件B2的材质例如可采用含有吸光材料(例如：碳)的硅胶系或压克力系材料。如此一来，经待辨识物10作用且通过导光组件120的光束B’若是入射角过大，则有可能被第一吸光组件B1或第二吸光组件B2吸收，而无法传递至影像撷取组件130。具体地，第一吸光组件B1适于收敛光束B’在第一吸光组件B1的排列方向(例如：第一方向D1)上的发散角度，而第二吸光组件B2适于收敛光束B’在第二吸光组件B2的排列方向(例如：第二方向D2)上的发散角度。以图4的光束B1’以及光束B2’举例说明，小角度入射第二透光组件T2的光束B1’在进入第二透光组件T2之后，第二吸光组件B2不位于光束B1’的传递路径上，因此光束B1’不会被第二吸光组件B2吸收，而能够传递至影像撷取组件130。相较之下，大角度入射第二透光组件T2的光束B2’在进入第二透光组件T2之后，由于第二吸光组件 B2位于光束B2’的传递路径上，因此光束B2’会被第二吸光组件B2吸收。The material of the first light transmissive component T1 and the second light transmissive component T2 may be glass, polycarbonate (PC), polymethyl methacrylate (PMMA) or other suitable materials. The material of the first light absorbing element B1 and the second light absorbing element B2 may be, for example, a silica gel type or an acrylic material containing a light absorbing material (for example, carbon). As a result, if the incident angle is too large, the light beam B' that acts through the light-receiving object 10 and passes through the light-guiding component 120 may be absorbed by the first light-absorbing component B1 or the second light-absorbing component B2, and cannot be transmitted to the image capturing device. Component 130. Specifically, the first light absorbing component B1 is adapted to converge the divergence angle of the light beam B′ in the arrangement direction of the first light absorbing component B1 (eg, the first direction D1), and the second light absorbing component B2 is adapted to converge the light beam B′ The divergence angle in the direction in which the two light absorbing members B2 are arranged (for example, the second direction D2). Taking the light beam B1 ′ and the light beam B2 ′ of FIG. 4 as an example, after the light beam B1 ′ incident on the second light-transmitting component T2 at a small angle enters the second light-transmitting component T2 , the second light-absorbing component B2 is not located in the transmission path of the light beam B1 ′. Therefore, the light beam B1' is not absorbed by the second light absorbing component B2 but can be transmitted to the image capturing component 130. In contrast, the light beam B2' incident on the second light transmissive component T2 at a large angle is after entering the second light transmissive component T2 due to the second light absorbing component B2 is located on the transmission path of the beam B2', so that the beam B2' is absorbed by the second light absorbing component B2.
进入准直组件(包括第一准直组件142以及第二准直组件144)的光束是否被吸光组件(包括第一吸光组件B1以及第二吸光组件B2)吸收(也就是吸光组件是否位于进入透光组件的光束的传递路径上)可取决于透光组件的宽度(包括第一透光组件T1的宽度W1以及第二透光组件T2宽度W2)、透光组件的高度(包括第一透光组件T1的高度H1以及第二透光组件T2高度H2)以及光束B’在透光组件的入光面的折射角(由光束B’的入射角以及透光组件的折射率决定)等。在透光组件的高度为定值的情况下，透光组件的宽度越大，影像撷取组件130接收到的光束B’的角度范围越大。在透光组件的宽度为定值的情况下，透光组件的高度越大，影像撷取组件130接收到的光束B’的角度范围越小。在透光组件的宽度以及高度为定值的情况下，光束B’的折射角越大(也就是入射角越大)，越有可能被吸光组件吸收。在本实施例中，第一透光组件T1以及第二透光组件T2的折射率分别大于1，且例如落在1.3至1.7的范围内。此外，第一透光组件T1以及第二透光组件T2的宽度与高度比分别落在2至20的范围内。然而，透光组件的折射率以及透光组件的宽度与高度比可依据不同的设计需求(例如：影像撷取组件130的节距(pitch))改变，而不限于上述。Whether the light beam entering the collimating assembly (including the first collimating component 142 and the second collimating component 144) is absorbed by the light absorbing component (including the first light absorbing component B1 and the second light absorbing component B2) (that is, whether the light absorbing component is located in the transparent component The transmission path of the light beam of the optical component may depend on the width of the light transmissive component (including the width W1 of the first light transmissive component T1 and the width W2 of the second light transmissive component T2), the height of the light transmissive component (including the first light transmission) The height H1 of the component T1 and the height H2 of the second light-transmitting component T2) and the angle of refraction of the light beam B' on the light-incident surface of the light-transmitting component (determined by the incident angle of the light beam B' and the refractive index of the light-transmitting component). In the case where the height of the light transmissive component is constant, the larger the width of the light transmissive component, the larger the angular range of the light beam B' received by the image capturing component 130. In the case where the width of the light transmissive component is constant, the greater the height of the light transmissive component, the smaller the angular extent of the beam B' received by the image capturing component 130. In the case where the width and height of the light-transmitting member are constant, the larger the angle of refraction of the light beam B' (i.e., the larger the incident angle), the more likely it is absorbed by the light-absorbing member. In the present embodiment, the refractive indices of the first light transmissive component T1 and the second light transmissive component T2 are respectively greater than 1, and fall within a range of, for example, 1.3 to 1.7. In addition, the width to height ratios of the first light transmissive component T1 and the second light transmissive component T2 fall within a range of 2 to 20, respectively. However, the refractive index of the light transmissive component and the width to height ratio of the light transmissive component may vary depending on different design requirements (eg, the pitch of the image capturing component 130), and are not limited thereto.
利用第一吸光组件B1以及第二吸光组件B2将经待辨识物10作用且通过导光组件120的光束B’中不同方向(例如：第一方向D1以及第二方向D2)上的大角度光束吸收，可使仅特定角度的光束(小角度入射的光束)传递至影像撷取组件130。经由适当的调变，可以使通过第一准直器140的光束B’能够以0度或接近0度的角度入射影像撷取组件130。换句话说，第一准直器140有助于将传递至影像撷取组件130的光束准直化。如此，不但有助于滤除杂散光，还有助于避免从不同透光组件输出的光束相互干扰的问题，使影像撷取组件130的取像质量提升。因此，生物特征辨识装置100可具有良好的辨识能力。A large-angle beam of light in different directions (for example, the first direction D1 and the second direction D2) of the light beam B' that acts through the light-receiving component 120 and passes through the light-guiding component 120 by the first light-absorbing component B1 and the second light-absorbing component B2 Absorption allows light beams of only a certain angle (light beams incident at a small angle) to be transmitted to the image capturing assembly 130. The light beam B' passing through the first collimator 140 can be incident on the image capture assembly 130 at an angle of 0 degrees or near 0 degrees via appropriate modulation. In other words, the first collimator 140 facilitates collimating the beam that is transmitted to the image capture assembly 130. In this way, not only the stray light is filtered out, but also the problem that the light beams output from the different light-transmitting components interfere with each other is avoided, and the image capturing quality of the image capturing component 130 is improved. Therefore, the biometric device 100 can have good recognition capabilities.
依据不同需求，生物特征辨识装置100还可包括其他组件。举例而言，生物特征辨识装置100还可包括第二准直器170。第二准直器170位于导光组件120与第一准直器140之间，且第二准直器170位于待辨识物10作用后的光束B’的传递路径上。举例而言，第二准直器170可配置在表面S上，且导光组件120与第二准直器170可借由连接机构或黏着层(例如：光学胶)而固定在一起，但不以此为限。 Biometric device 100 may also include other components depending on various needs. For example, biometric device 100 can also include a second collimator 170. The second collimator 170 is located between the light guiding component 120 and the first collimator 140, and the second collimator 170 is located on the transmission path of the light beam B' after the object 10 is to be recognized. For example, the second collimator 170 can be disposed on the surface S, and the light guiding component 120 and the second collimator 170 can be fixed together by a connecting mechanism or an adhesive layer (eg, optical glue), but not This is limited to this.
第二准直器170适于在光束B’通过第一准直器140之前，预先将光束B’准直化，以收敛光束B’的发散角。如此，可增加光束B’后续通过第一准直器140的机率。图5为图1中导光组件以及第二准直器的一种放大图。请参照图1及图5，第二准直器170可包括多个棱镜172，且棱镜172的顶角TA分别指向导光组件120。在本实施例中，各棱镜172的两个底角BA的角度相同。然而，棱镜172的顶角TA及底角BA可依据不同的需求改变，而不限于此。The second collimator 170 is adapted to pre-align the beam B' before the beam B' passes through the first collimator 140 to converge the divergence angle of the beam B'. As such, the probability of subsequent passage of beam B' through first collimator 140 can be increased. FIG. 5 is an enlarged view of the light guiding assembly and the second collimator of FIG. 1. FIG. Referring to FIGS. 1 and 5 , the second collimator 170 may include a plurality of prisms 172 , and the vertex angles TA of the prisms 172 refer to the light guide components 120 , respectively. In the present embodiment, the angles of the two bottom corners BA of the respective prisms 172 are the same. However, the apex angle TA and the bottom angle BA of the prism 172 may vary according to different needs, and are not limited thereto.
图6为本发明另一实施例的生物特征辨识装置的剖面示意图。图6的生物特征辨识装置100A与图1的生物特征辨识装置100相似，且生物特征辨识装置100A具有与生物特征辨识装置100相似的功效与优点，于此便不再重述。图6的生物特征辨识装置100A与图1的生物特征辨识装置100的差异在于光源110的位置不同。详细而言，在图6的实施例中，光源110位于导光组件120A的侧面。在此架构下，导光组件120A例如为板状，且导光组件120A可以省略图1中导光组件120的入光部124。 FIG. 6 is a cross-sectional view of a biometric device according to another embodiment of the present invention. The biometric device 100A of FIG. 6 is similar to the biometric device 100 of FIG. 1, and the biometric device 100A has similar functions and advantages as the biometric device 100, and will not be repeated here. The difference between the biometric device 100A of FIG. 6 and the biometric device 100 of FIG. 1 is that the position of the light source 110 is different. In detail, in the embodiment of FIG. 6, the light source 110 is located on the side of the light guide assembly 120A. Under this architecture, the light guiding component 120A is, for example, a plate shape, and the light guiding component 120A can omit the light incident portion 124 of the light guiding component 120 of FIG. 1 .
综上所述，在本发明的实施例的生物特征辨识装置中，利用第一吸光组件以及第二吸光组件吸收不同方向上的大角度光束，以将传递至影像撷取组件的光束准直化，使影像撷取组件的取像质量提升。因此，生物特征辨识装置可具有良好的辨识能力。In summary, in the biometric device of the embodiment of the present invention, the first light absorbing component and the second light absorbing component are used to absorb the large-angle light beams in different directions to collimate the light beam transmitted to the image capturing component. , to improve the image quality of the image capture component. Therefore, the biometric device can have good recognition capabilities.
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。 Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims (10)

  1. 一种生物特征辨识装置，其特征在于，包括：A biometric identification device, comprising:
    光源，适于提供光束；a light source adapted to provide a light beam;
    导光组件，位于所述光束的传递路径上；a light guiding component located on a transmission path of the light beam;
    影像撷取组件，位于所述导光组件下方且具有多个像素区；以及An image capturing component located below the light guiding component and having a plurality of pixel regions;
    第一准直器，位于所述导光组件与所述影像撷取组件之间，其中所述第一准直器包括：a first collimator, located between the light guiding component and the image capturing component, wherein the first collimator comprises:
    第一准直组件，包括间隔排列的多个第一吸光组件；以及a first collimating assembly comprising a plurality of first light absorbing assemblies spaced apart;
    第二准直组件，重叠于所述第一准直组件且包括间隔排列的多个第二吸光组件，其中所述多个第二吸光组件与所述多个第一吸光组件交错而定义出多个透光区，所述多个透光区重叠于所述多个像素区。a second collimating component, overlapping the first collimating component and including a plurality of second light absorbing components arranged at intervals, wherein the plurality of second light absorbing components are interleaved with the plurality of first light absorbing components to define a plurality of a light transmitting region, wherein the plurality of light transmitting regions overlap the plurality of pixel regions.
  2. 根据权利要求1所述的生物特征辨识装置，其特征在于，所述导光组件具有出光部以及连接于所述出光部的入光部，所述光源与所述影像撷取组件共同位于所述出光部下方，所述入光部位于所述光源与所述出光部之间。The biometric identification device according to claim 1, wherein the light guiding component has a light exiting portion and a light incident portion connected to the light exiting portion, and the light source and the image capturing component are located together Below the light exit portion, the light incident portion is located between the light source and the light exit portion.
  3. 根据权利要求1所述的生物特征辨识装置，其特征在于，所述光源位于所述导光组件的侧面。The biometric device of claim 1 wherein said light source is located on a side of said light directing assembly.
  4. 根据权利要求1所述的生物特征辨识装置，其特征在于，所述导光组件面向所述第一准直器的表面形成有多个微结构，所述多个微结构凸出或凹入于所述表面。The biometric device according to claim 1, wherein a surface of the light guiding component facing the first collimator is formed with a plurality of microstructures, and the plurality of microstructures are convex or concave. The surface.
  5. 根据权利要求1所述的生物特征辨识装置，其特征在于，所述第一准直组件还包括多个第一透光组件，所述多个第一吸光组件以及所述多个第一透光组件交替排列且相互连接，所述第二准直组件还包括多个第二透光组件，所述多个第二吸光组件以及所述多个第二透光组件交替排列且相互连接，且所述多个第一透光组件以及所述多个第二透光组件的折射率分别大于1。The biometric identification device according to claim 1, wherein the first collimating assembly further comprises a plurality of first light transmissive components, the plurality of first light absorbing components and the plurality of first light transmissive components The components are alternately arranged and connected to each other, and the second collimating assembly further includes a plurality of second light transmissive components, the plurality of second light absorbing components and the plurality of second light transmissive components are alternately arranged and connected to each other, and The refractive indices of the plurality of first light transmissive components and the plurality of second light transmissive components are each greater than one.
  6. 根据权利要求5所述的生物特征辨识装置，其特征在于，所述多个第一透光组件以及所述多个第二透光组件的折射率分别落在1.3至1.7的范围内。The biometric device according to claim 5, wherein the refractive indices of the plurality of first light transmissive components and the plurality of second light transmissive components fall within a range of 1.3 to 1.7, respectively.
  7. 根据权利要求5所述的生物特征辨识装置，其特征在于，所述多个第一透光组件以及所述多个第二透光组件的宽度与高度比分别落在2至20的范围内。The biometric device according to claim 5, wherein width and height ratios of the plurality of first light transmissive components and the plurality of second light transmissive components fall within a range of 2 to 20, respectively.
  8. 根据权利要求5所述的生物特征辨识装置，其特征在于，所述多个第一吸光组件以及所述多个第一透光组件沿第一方向交替排列且分别沿与所述第一方向相交的第二方向延伸，所述多个第二吸光组件以及所述多个第二透光组件沿所述第二方向交替排列且分别沿所述第一方向延伸。The biometric device according to claim 5, wherein the plurality of first light absorbing components and the plurality of first light permeable components are alternately arranged in a first direction and respectively intersecting the first direction Extending in a second direction, the plurality of second light absorbing components and the plurality of second light permeable components are alternately arranged along the second direction and respectively extend along the first direction.
  9. 根据权利要求1所述的生物特征辨识装置，其特征在于，还包括：The biometric identification device according to claim 1, further comprising:
    盖板，其中所述导光组件位于所述盖板与所述第一准直器之间。a cover plate, wherein the light guiding component is located between the cover plate and the first collimator.
  10. 根据权利要求1所述的生物特征辨识装置，其特征在于，还包括：The biometric identification device according to claim 1, further comprising:
    第二准直器，位于所述导光组件与所述第一准直器之间，所述第二准直器包括多个棱镜，且所述多个棱镜的顶角分别指向所述导光组件。 a second collimator located between the light guiding component and the first collimator, the second collimator includes a plurality of prisms, and a top angle of the plurality of prisms respectively point to the light guiding Component.
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