WO2018113121A1 - Biometric identification device - Google Patents

Biometric identification device Download PDF

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Publication number
WO2018113121A1
WO2018113121A1 PCT/CN2017/078385 CN2017078385W WO2018113121A1 WO 2018113121 A1 WO2018113121 A1 WO 2018113121A1 CN 2017078385 W CN2017078385 W CN 2017078385W WO 2018113121 A1 WO2018113121 A1 WO 2018113121A1
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WO
WIPO (PCT)
Prior art keywords
light
biometric device
light guiding
guiding element
optical structure
Prior art date
Application number
PCT/CN2017/078385
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French (fr)
Chinese (zh)
Inventor
王炯翰
Original Assignee
创智能科技股份有限公司
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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 WO2018113121A1 publication Critical patent/WO2018113121A1/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 device.
  • the types of biometrics include face, sound, iris, retina, veins, and fingerprint 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 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 capacitive fingerprint identification device is provided with a cover lens, and the sensing effect of the capacitive fingerprint recognition device is transmitted. The impact of components. Therefore, optical fingerprint recognition devices have also received much attention.
  • an electronic product for example, a mobile phone or a tablet computer
  • the optical fingerprint identification device comprises a light source, a light guiding component and an image capturing component.
  • the light source is used to emit a light beam to illuminate a finger pressing the fingerprint recognition device.
  • Finger fingerprints are made up of a number of irregular ridges and indentations.
  • the beams reflected by the ridges and the indentations form a fingerprint image that is interlaced on the receiving surface of the image capturing element.
  • the image capture component converts the fingerprint image into corresponding image information and inputs the image information to the processing unit.
  • the processing unit may use an algorithm to calculate image information corresponding to the fingerprint for identification of the user.
  • the efficiency of the light beam emitted from the light source coupled to the light guiding element is poor, resulting in low light utilization efficiency of the fingerprint identification device.
  • the invention provides a biometric device.
  • the biometric device comprises a light guiding element, an optical structure, a light source and an image capturing element.
  • the light guiding element includes a first surface, a second surface, an inner sidewall, an outer sidewall, and a bottom surface.
  • the second surface is disposed relative to the first surface.
  • the inner sidewall is coupled to the second surface and forms a recess with the second surface.
  • the outer sidewall is coupled to the first surface and disposed relative to the inner sidewall.
  • the bottom surface is disposed relative to the first surface and is coupled between the inner sidewall and the outer sidewall.
  • the optical structure is disposed relative to the bottom surface and coupled between the first surface and the outer sidewall.
  • the optical structure has at least one reflective surface.
  • the light source is disposed beside the bottom surface of the light guiding element and is used to emit a light beam. After the light beam enters the light guiding element from the bottom surface, it is inverted by at least one reflective surface of the optical structure Shot to transmit to the area between the first surface and the second surface.
  • the image capture element is disposed relative to the second surface of the light guide element.
  • the optical structure includes a plurality of micro-pits.
  • a plurality of micro-pits are formed on the light guiding element.
  • the at least one reflecting surface is a plurality of reflecting surfaces, and the plurality of micro recesses each have a plurality of reflecting surfaces.
  • At least one of the reflecting surfaces is a reflecting surface
  • the optical structure is a reflecting surface directly connected between the first surface and the outer side wall.
  • the biometric device further includes a reflective layer.
  • the reflective layer covers the optical structure. The light beam is reflected by the reflective layer after entering the light guiding element from the bottom surface to be transferred to the region between the first surface and the second surface.
  • the image capturing element is located in the groove and has a light receiving surface, and the light receiving surface faces the second surface of the light guiding element.
  • the biometric device further includes a circuit board.
  • the image capturing component is disposed on the circuit board and electrically connected to the circuit board, and the image capturing component is located in a space surrounded by the recess and the circuit board.
  • the biometric device further includes a collimating element.
  • the collimating element is disposed between the second surface of the light guiding element and the image capturing element.
  • the biometric device further includes a light transmissive element.
  • the light transmissive element is disposed on the first surface of the light guiding element.
  • the light transmissive element has a pressing surface for pressing the object to be recognized.
  • the object to be recognized includes a fingerprint, a vein, a palm print, or a combination thereof.
  • the biometric device includes a light guiding element, an optical structure, a light source, and an image capturing element.
  • the optical structure is coupled between the first surface and the outer sidewall of the light guiding element and disposed opposite to the bottom surface of the light guiding element.
  • the optical structure has at least one reflective surface. At least one reflective surface of the optical structure is used to reflect the light beam from the bottom surface of the light guiding element such that the light beam is transmitted between the first surface and the second surface of the light element. Thereby, the efficiency of the light beam coupled into the working area of the light guiding element is increased, thereby increasing the light utilization efficiency of the biometric device.
  • FIG. 1 is a cross-sectional view showing a biometric device according to an embodiment of the present invention
  • FIG. 2 is a cross-sectional view showing a biometric device according to another embodiment of the present invention.
  • FIG. 3 is a cross-sectional view showing a biometric device according to still another embodiment of the present invention.
  • 100, 100A, 100B biometric device
  • the biometric device 100 includes a light guiding component 110 , an optical structure 120 , a light source 130 , and an image capturing component 140 .
  • the light guiding element 110 includes a first surface 112, a second surface 114, an outer sidewall 116, an inner sidewall 118, and a bottom surface 119.
  • the second surface 114 is disposed relative to the first surface 112.
  • the inner sidewall 118 is coupled to the second surface 114.
  • the inner sidewall 118 forms a recess 110a with the second surface 114.
  • the outer sidewall 116 is coupled to the first surface 112 and disposed relative to the inner sidewall 118.
  • the bottom surface 119 is disposed relative to the first surface 112 and is coupled between the outer sidewall 116 and the inner sidewall 118.
  • the region 110b between the first surface 112 and the second surface 114 overlaps the image capturing element 140. More specifically, the orthographic projection of the region 110b on the light receiving surface 140a of the image capturing element 140 covers the light receiving surface 140a. In other words, the orthographic area of the region 110b on the light receiving surface 140a may be greater than or equal to the area of the light receiving surface 140a.
  • the region 110b is a working area of the light guiding element 110.
  • the region 110c other than the region 110b is a light incident region of the light guiding element 110, and the light incident region has an outer sidewall 116, an inner sidewall 118, and a bottom surface 119.
  • the first surface 112 and the second surface 114 are selectively parallel
  • the outer sidewall 116 and the inner sidewall 118 are selectively parallel
  • the inner sidewall 118 and the first surface 112 are selectively perpendicular, but The invention is not limited to this.
  • the material of the light guiding element 110 may be glass, polycarbonate (PC) or polymethyl methacrylate (PMMA).
  • PC polycarbonate
  • PMMA polymethyl methacrylate
  • the present invention is not limited thereto.
  • the material of the light guiding element 110 may also be other suitable materials.
  • the optical structure 120 is disposed relative to the bottom surface 119 and is coupled between the first surface 112 and the outer sidewall 116.
  • the optical structure 120 is formed on the light guiding element 110.
  • the material of the optical structure 120 and the material of the light guiding element 110 may be the same.
  • the optical structure 120 and the light guiding element 110 may be integrally formed, and the optical structure 120 may be a part of the surface of the light guiding element 110.
  • the optical structure 120 and the light guiding element 110 may be separately fabricated, and then the optical structure 120 is disposed on the light guiding element 110.
  • optical structure 120 has at least one reflective surface 120a.
  • optical structure 120 includes a plurality of micro-pits 122.
  • the at least one reflecting surface 120a is a plurality of reflecting surfaces 120a.
  • Each micro-recess 122 has a corresponding one of the reflective surfaces 120a.
  • each of the micro-pits 122 may have a connecting surface 122a connected between the adjacent two reflecting surfaces 120a in addition to the reflecting surface 120a.
  • the reflective surface 120a and the connecting surface 122a of each micro-pit 122 may be inclined with respect to the first surface 112 of the light guiding element 110, and the oblique direction of the reflective surface 120a and the connecting surface 122a may be opposite.
  • the reflective surface 120a of the micro-pit 122 may be directly connected to the connecting surface 122a, and the micro-recess 122 may be a V-shaped recess.
  • the micro-pits 122 may also have other suitable shapes.
  • the micro-recess 122 may also be a curved surface that is recessed inside the light guiding element 110, and the reflective surface 120a of the micro-recess 122 may also be a curved surface.
  • the shape of the reflecting surface 120a of the micro-pit 122 is not limited to the plane inclined with respect to the first surface 112 as shown in FIG.
  • the light source 130 is disposed beside the bottom surface 119 of the light guiding element 110.
  • the biometric device 100 can optionally include a support 192.
  • the support 192 extends from the bottom surface 119 toward the side of the light source 130 to maintain a gap between the bottom surface 119 and the light source 130.
  • the support 192 may be integrally formed with the light guiding element 110, the circuit board 160 or the light source 130, or be a member other than the light guiding element 110, the circuit board 160, and the light source 130, and the invention is not limited thereto.
  • the biometric device 100 can also include an optical glue 194.
  • the optical glue 194 can fill the gap between the bottom surface 119 of the light guiding element 110 and the light source 130 to reduce the loss of the light beam L before entering the light guiding element 110.
  • the support 192, the bottom surface 119 of the light guiding element 110, the circuit board 160 and their relative relationship are only one way to illustrate that the light source 130 is disposed beside the bottom surface 119.
  • the biometric device 100 may also include the support 192, while the light source 130 is disposed adjacent to the bottom surface 119 in other suitable manners.
  • the biometric device 100 may not include the support 192, the bottom surface 119 of the light guiding element 110 may have a recess (not shown), and the light source 130 may be selectively disposed on the recess and the circuit of the bottom surface 119.
  • the biometric device 100 may not include the support 192, the bottom surface 119 of the light guiding element 110 may not have a recess, and the circuit board 160 may have a recess (not shown), and the light source 130 may be disposed on the circuit board 160.
  • the bottom surface 119 of the light guiding element 110 is disposed on the circuit board 160 Above the recess, the light beam L can also enter the light guiding element 110 from the bottom surface 119 without the recess.
  • the light source 130 is used to emit the light beam L.
  • the light beam L is, for example, invisible light (for example, infrared light).
  • the light beam L may also be visible light (for example, red light, blue light, green light, or a combination thereof) or a combination of visible light and invisible light.
  • the light source 130 is, for example, a light emitting diode.
  • the present invention is not limited thereto, and in other embodiments, the light source 130 may be other suitable types of light-emitting elements.
  • the two light sources 130 shown in FIG. 1 are exemplified, and the light sources 130 are disposed on opposite sides of the light guiding element 110.
  • the present invention is not limited thereto.
  • the number of the light sources 130 may be single and disposed on one side of the light guiding element 110, or the number of the light sources 130 may be three or more and disposed on the light guiding element 110. More than three sides.
  • the image capture component 140 is disposed relative to the second surface 114 of the light guide component 110.
  • the image capturing element has a light receiving surface 140a.
  • the light receiving surface 140a faces the second surface 114 of the light guiding element 110.
  • the biometric device 100 further includes a circuit board 160.
  • the image capturing component 140 can be disposed on the circuit board 160 and electrically connected to the circuit board 160. Further, in the embodiment, the image capturing component 140 can be disposed in the space surrounded by the recess 110a of the light guiding component 110 and the circuit board 160, but the invention is not limited thereto.
  • the image capturing component 140 has a plurality of pixel regions 142 arranged in an array to receive the light beam L reflected by the object to be recognized 10, thereby obtaining an image of the object 10 to be identified.
  • the image capturing component 140 can be a charge-coupled device (CCD), a complementary metal oxide semiconductor (CMOS), or other suitable type of image sensor array.
  • CCD charge-coupled device
  • CMOS complementary metal oxide semiconductor
  • the biometric device 100 further includes a light transmissive element 170.
  • the light transmissive element 170 is disposed on the first surface 112 of the light guiding element 110.
  • the light transmissive element 170 has a pressing surface 172 that is opposite to the light guiding element 110.
  • the pressing surface 172 is pressed by the object to be recognized 10.
  • the object to be identified 10 may be a biological feature of a living being, such as a fingerprint, a vein, a palm print, or a combination of at least two of the above.
  • the present invention is not limited thereto, and in the case of abnormal use, the object to be identified 10 may also be a forgery such as a fake finger.
  • the biometric device 100 further includes an optical glue 180.
  • the light transmissive element 170 is connectable to the first surface 112 of the light guiding element 110 through the optical adhesive 180.
  • the refractive indices of the light transmissive element 170, the optical adhesive 180, and the light guiding element 110 may be the same or similar to reduce the boundary between the light transmitting element 170 and the optical adhesive 180 and the optical adhesive 180 and the light guiding component.
  • the reflection of the junction of 110 enhances the light utilization efficiency and/or image quality of the biometric device 100.
  • the present invention is not limited thereto, and in other embodiments, the light transmitting element
  • the refractive indices of the member 170, the optical adhesive 180, and the light guiding member 110 may also be different.
  • the light beam L enters the light guiding element 110 from the bottom surface 119 and is reflected by the at least one reflecting surface 120a of the optical structure 120 to be transmitted to the region 110b between the first surface 112 and the second surface 114.
  • the efficiency of coupling the light beam L into the working area of the light guiding element 110 ie, the region 110b
  • the light beam L passes through the bottom surface 119 and is reflected by the reflective surface 120a of the micro-recess 122 to transmit the light beam L to the region 110b between the first surface 112 and the second surface 114.
  • the biometric device 100 may further include a reflective layer 196.
  • Reflective layer 196 covers optical structure 120.
  • the reflective layer 196 can cover the reflective surface 120a and the connection surface 122a of the micro-pit 122 without covering the working area of the light guiding element 110 (ie, the region 110b).
  • the light beam L can be reflected by the reflective layer 196 to be transmitted to the region 110b between the first surface 112 and the second surface 114. Thereby, more light beams L can be coupled into the working area of the light guiding element 110 (ie, the region 110b), and the light utilization efficiency of the biometric device 100 can be further improved.
  • the reflective layer 196 is, for example, a metal thin film.
  • the invention is not limited thereto, and in other embodiments, the reflective layer 196 may also be other suitable materials.
  • the biometric device 100 can also include a collimating element 150.
  • the collimating element 150 is disposed between the second surface 114 of the light guiding element 110 and the image capturing element 140.
  • the collimating element 150 can be connected to the image capturing element 140 through an optical glue (not shown), but the invention is not limited thereto.
  • the collimating element 150 has a plurality of light transmissive regions 152.
  • the plurality of light transmissive regions 152 respectively correspond to the plurality of pixel regions 142 of the image capturing component 140.
  • the light beam L reflected by each of the objects to be identified 10 can be transmitted to the corresponding pixel region 142 through the corresponding one of the light transmitting regions 152, and is not easily transferred to the other pixel regions 142. Thereby, the image capturing quality of the biometric device 100 can be further improved.
  • the biometric device 100 may optionally not include the collimating element 150.
  • FIG. 2 is a cross-sectional view of a biometric device according to another embodiment of the present invention.
  • the biometric device 100A of FIG. 2 is similar to the biometric device 100 of FIG. 1 in that the shape of the light guiding element 110 of the biometric device 100A is different from the shape of the light guiding element 110 of the biometric device 100.
  • the outer sidewall 116 and the inner sidewall 118 of the light guiding element 110 can be inclined relative to the first surface 112, and the inner diameter D of the recess 110a can increase as it moves away from the first surface 112.
  • the biometric device 100A has similar functions and advantages as the biometric device 100. This will not be repeated here.
  • FIG. 3 is a cross-sectional view showing a biometric device according to still another embodiment of the present invention.
  • the biometric device 100B of FIG. 3 is similar to the biometric device 100 of FIG. 1 in that the optical structure 120B of the biometric device 100B is different from the optical structure 120 of the biometric device 100.
  • optical structure 120B can be a reflective surface 120a that is coupled between first surface 112 and outer sidewall 116. After entering the light guiding element 110 from the bottom surface 119, the light beam L is reflected by the reflecting surface 120a to be transmitted to the region 110b between the first surface 112 and the second surface 114.
  • the reflecting surface 120a may be a plane inclined with respect to the first surface 112. However, the present invention is not limited thereto, and in other embodiments, the reflecting surface 120a may also be a curved surface.
  • the biometric device 100B has similar functions and advantages as the biometric device 100 and will not be repeated here.
  • the biometric device includes a light guiding component, an optical structure, a light source, and an image capturing component.
  • the optical structure is coupled between the first surface and the outer sidewall of the light guiding element and disposed opposite to the bottom surface of the light guiding element.
  • the optical structure has at least one reflective surface. At least one reflective surface of the optical structure is used to reflect the light beam from the bottom surface of the light guiding element such that the light beam is transmitted between the first surface and the second surface of the light element. Thereby, the efficiency of the light beam coupled into the working area of the light guiding element is increased, thereby increasing the light utilization efficiency of the biometric device.

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Abstract

A biometric identification device (100, 100A, 100B), comprising a light guide element (110), an optical structure (120, 120B), a light source (130) and an image-capturing element (140). The light guide element (110) comprises a first surface (112), a second surface (114), an inner side wall (118), an outer side wall (116) and a bottom surface (119). The inner side wall (118) is connected to the second surface (114) and forms a groove (110a) with the second surface (114), the outer side wall (116) is connected to the first surface (112) and is arranged opposite the inner side wall (118), the bottom surface (119) is arranged opposite the first surface (112) and is connected between the inner side wall (118) and the outer side wall (116), and the optical structure (120, 120B) is connected between the first surface (112) and the outer side wall (116). The optical structure (120, 120B) is provided with a reflective surface (120a), the light source (130) is arranged beside the bottom surface (119), and light beams are reflected by the reflective surface (120a) of the optical structure (120, 120B) after entering the light guide element (110) from the bottom surface (119), so as to be transmitted to an area between the first surface (112) and the second surface (114), thereby increasing the efficiency of the light beams being coupled and entering a working area of the light guide element (110), and increasing the light utilisation efficiency of the biometric identification device (100, 100A, 100B).

Description

生物辨识装置Biometric device 技术领域Technical field
本发明涉及一种生物辨识装置。The invention relates to a biometric device.
背景技术Background technique
生物辨识的种类包括脸部、声音、虹膜、视网膜、静脉和指纹辨识等。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、平板电脑)时，电容式指纹辨识装置上方多设有透光元件(cover lens)，而电容式指纹辨识装置的感测效果会受到透光元件的影响。因此，光学式指纹辨识装置也倍受重视。The types of biometrics include face, sound, iris, retina, veins, and fingerprint 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 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 capacitive fingerprint identification device is provided with a cover lens, and the sensing effect of the capacitive fingerprint recognition device is transmitted. The impact of components. Therefore, optical fingerprint recognition devices have also received much attention.
光学式指纹辨识装置包括光源、导光元件及影像撷取元件。光源用以发出光束，以照射按压指纹辨识装置的手指。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元件的接收面上形成为明暗交错的指纹影像。影像撷取元件可将指纹影像转换为对应的影像资讯，并将影像资讯输入至处理单元。处理单元可利用演算法计算对应于指纹的影像资讯，以进行使用者的身份辨识。然而，在已知的指纹辨识装置中，光源发出的光束耦入导光元件的效率不佳，造成指纹辨识装置的光利用率低。The optical fingerprint identification device comprises a light source, a light guiding component and an image capturing component. The light source is used to emit a light beam to illuminate a finger pressing the fingerprint recognition device. Finger fingerprints are made up of a number of irregular ridges and indentations. The beams reflected by the ridges and the indentations form a fingerprint image that is interlaced on the receiving surface of the image capturing element. The image capture component converts the fingerprint image into corresponding image information and inputs the image information to 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 known fingerprint recognition device, the efficiency of the light beam emitted from the light source coupled to the light guiding element is poor, resulting in low light utilization efficiency of the fingerprint identification device.
发明内容Summary of the invention
本发明提供一种生物辨识装置。The invention provides a biometric device.
根据本发明的实施例，生物辨识装置包括导光元件、光学结构、光源及影像撷取元件。导光元件包括第一表面、第二表面、内侧壁、外侧壁及底面。第二表面相对于第一表面设置。内侧壁与第二表面连接且与第二表面形成凹槽。外侧壁与第一表面连接且相对于内侧壁设置。底面相对于第一表面设置且连接于内侧壁与外侧壁之间。光学结构相对于底面设置且连接于第一表面与外侧壁之间。光学结构具有至少一反射面。光源设置于导光元件的底面旁且用以发出光束。光束自底面进入导光元件后被光学结构的至少一反射面反 射，以向第一表面与第二表面之间的区域传递。影像撷取元件相对于导光元件的第二表面设置。According to an embodiment of the invention, the biometric device comprises a light guiding element, an optical structure, a light source and an image capturing element. The light guiding element includes a first surface, a second surface, an inner sidewall, an outer sidewall, and a bottom surface. The second surface is disposed relative to the first surface. The inner sidewall is coupled to the second surface and forms a recess with the second surface. The outer sidewall is coupled to the first surface and disposed relative to the inner sidewall. The bottom surface is disposed relative to the first surface and is coupled between the inner sidewall and the outer sidewall. The optical structure is disposed relative to the bottom surface and coupled between the first surface and the outer sidewall. The optical structure has at least one reflective surface. The light source is disposed beside the bottom surface of the light guiding element and is used to emit a light beam. After the light beam enters the light guiding element from the bottom surface, it is inverted by at least one reflective surface of the optical structure Shot to transmit to the area between the first surface and the second surface. The image capture element is disposed relative to the second surface of the light guide element.
在根据本发明的实施例的生物辨识装置中，光学结构包括多个微凹陷。多个微凹陷形成于导光元件上。至少一反射面为多个反射面，而多个微凹陷分别具有多个反射面。In the biometric device according to an embodiment of the present invention, the optical structure includes a plurality of micro-pits. A plurality of micro-pits are formed on the light guiding element. The at least one reflecting surface is a plurality of reflecting surfaces, and the plurality of micro recesses each have a plurality of reflecting surfaces.
在根据本发明的实施例的生物辨识装置中，至少一反射面为一个反射面，而光学结构为直接连接于第一表面与外侧壁之间的一个反射面。In the biometric device according to the embodiment of the present invention, at least one of the reflecting surfaces is a reflecting surface, and the optical structure is a reflecting surface directly connected between the first surface and the outer side wall.
在根据本发明的实施例的生物辨识装置中，生物辨识装置还包括反射层。反射层覆盖光学结构。光束自底面进入导光元件后被反射层反射，以向第一表面与第二表面之间的区域传递。In the biometric device according to an embodiment of the present invention, the biometric device further includes a reflective layer. The reflective layer covers the optical structure. The light beam is reflected by the reflective layer after entering the light guiding element from the bottom surface to be transferred to the region between the first surface and the second surface.
在根据本发明的实施例的生物辨识装置中，影像撷取元件位于凹槽中且具有光接收面，而光接收面朝向导光元件的第二表面。In the biometric device according to an embodiment of the present invention, the image capturing element is located in the groove and has a light receiving surface, and the light receiving surface faces the second surface of the light guiding element.
在根据本发明的实施例的生物辨识装置中，生物辨识装置还包括电路板。影像撷取元件配置于电路板上且与电路板电性连接，而影像撷取元件位于凹槽与电路板围出的空间中。In the biometric device according to an embodiment of the present invention, the biometric device further includes a circuit board. The image capturing component is disposed on the circuit board and electrically connected to the circuit board, and the image capturing component is located in a space surrounded by the recess and the circuit board.
在根据本发明的实施例的生物辨识装置中，生物辨识装置还包括准直元件。准直元件配置于导光元件的第二表面与影像撷取元件之间。In the biometric device according to an embodiment of the present invention, the biometric device further includes a collimating element. The collimating element is disposed between the second surface of the light guiding element and the image capturing element.
在根据本发明的实施例的生物辨识装置中，生物辨识装置还包括透光元件。透光元件配置于导光元件的第一表面上。透光元件具有按压面，以供待辨识物按压。In the biometric device according to an embodiment of the present invention, the biometric device further includes a light transmissive element. The light transmissive element is disposed on the first surface of the light guiding element. The light transmissive element has a pressing surface for pressing the object to be recognized.
在根据本发明的实施例的生物辨识装置中，待辨识物包括指纹、静脉、掌纹或其组合。In the biometric device according to an embodiment of the present invention, the object to be recognized includes a fingerprint, a vein, a palm print, or a combination thereof.
基于上述，本发明一实施例的生物辨识装置包括导光元件、光学结构、光源及影像撷取元件。光学结构连接于导光元件的第一表面与外侧壁之间且相对于导光元件的底面设置。光学结构具有至少一反射面。利用光学结构的至少一反射面能反射来自导光元件的底面的光束，以使光束向导光元件的第一表面与第二表面之间传递。藉此，光束耦入导光元件的工作区的效率提升，进而增加生物辨识装置的光利用效率。Based on the above, the biometric device according to an embodiment of the invention includes a light guiding element, an optical structure, a light source, and an image capturing element. The optical structure is coupled between the first surface and the outer sidewall of the light guiding element and disposed opposite to the bottom surface of the light guiding element. The optical structure has at least one reflective surface. At least one reflective surface of the optical structure is used to reflect the light beam from the bottom surface of the light guiding element such that the light beam is transmitted between the first surface and the second surface of the light element. Thereby, the efficiency of the light beam coupled into the working area of the light guiding element is increased, thereby increasing the light utilization efficiency of the biometric device.
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辨识装置的剖面示意图；1 is a cross-sectional view showing a biometric device according to an embodiment of the present invention;
图2为本发明另一实施例的生物辨识装置的剖面示意图；2 is a cross-sectional view showing a biometric device according to another embodiment of the present invention;
图3为本发明又一实施例的生物辨识装置的剖面示意图。3 is a cross-sectional view showing a biometric device according to still 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、100B：生物辨识装置；100, 100A, 100B: biometric device;
110：导光元件；110: a light guiding element;
110a：凹槽；110a: a groove;
110b、110c：区域；110b, 110c: area;
112：第一表面；112: a first surface;
114：第二表面；114: a second surface;
116：外侧壁；116: outer side wall;
118：内侧壁；118: inner side wall;
119：底面；119: the bottom surface;
120、120B：光学结构；120, 120B: optical structure;
120a：反射面120a: reflective surface
122：微凹陷122: micro-depression
122a：连接面122a: connection surface
130：光源；130: a light source;
140：影像撷取元件；140: image capturing component;
140a：光接收面；140a: light receiving surface;
142：像素区；142: a pixel area;
150：准直元件；150: a collimating element;
152：透光区；152: a light transmitting area;
160：电路板；160: circuit board;
170：透光元件；170: light transmitting member;
172：按压面； 172: pressing surface;
180、194：光学胶；180, 194: optical glue;
192：支撑物；192: a support;
196：反射层；196: a reflective layer;
D：内径；D: inner diameter;
L：光束。L: Beam.
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，相同元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 Wherever possible, the same element symbols are used in the FIGS.
图1为本发明一实施例的生物辨识装置的剖面示意图。请参照图1，生物辨识装置100包括导光元件110、光学结构120、光源130及影像撷取元件140。导光元件110包括第一表面112、第二表面114、外侧壁116、内侧壁118及底面119。第二表面114相对于第一表面112设置。内侧壁118与第二表面114连接。内侧壁118与第二表面114形成凹槽110a。外侧壁116与第一表面112连接且相对于内侧壁118设置。底面119相对于第一表面112设置且连接于外侧壁116与内侧壁118之间。第一表面112与第二表面114之间的区域110b与影像撷取元件140重叠。更进一步地说，区域110b在影像撷取元件140的光接收面140a上的正投影涵盖光接收面140a。换言之，区域110b在光接收面140a上的正投影面积可大于或等于光接收面140a的面积。区域110b为导光元件110的工作区。区域110b以外的区域110c为导光元件110的入光区，所述入光区具有外侧壁116、内侧壁118及底面119。在本实施例中，第一表面112与第二表面114可选择性地平行，外侧壁116与内侧壁118可选择性地平行，内侧壁118与第一表面112可选择性地垂直，但本发明不以此为限。在本实施例中，导光元件110的材质可为玻璃、聚碳酸酯(PC)或聚甲基丙烯酸甲酯(PMMA)。但本发明不限于此，在其他实施例中，导光元件110的材质也可为其他适当材料。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 includes a light guiding component 110 , an optical structure 120 , a light source 130 , and an image capturing component 140 . The light guiding element 110 includes a first surface 112, a second surface 114, an outer sidewall 116, an inner sidewall 118, and a bottom surface 119. The second surface 114 is disposed relative to the first surface 112. The inner sidewall 118 is coupled to the second surface 114. The inner sidewall 118 forms a recess 110a with the second surface 114. The outer sidewall 116 is coupled to the first surface 112 and disposed relative to the inner sidewall 118. The bottom surface 119 is disposed relative to the first surface 112 and is coupled between the outer sidewall 116 and the inner sidewall 118. The region 110b between the first surface 112 and the second surface 114 overlaps the image capturing element 140. More specifically, the orthographic projection of the region 110b on the light receiving surface 140a of the image capturing element 140 covers the light receiving surface 140a. In other words, the orthographic area of the region 110b on the light receiving surface 140a may be greater than or equal to the area of the light receiving surface 140a. The region 110b is a working area of the light guiding element 110. The region 110c other than the region 110b is a light incident region of the light guiding element 110, and the light incident region has an outer sidewall 116, an inner sidewall 118, and a bottom surface 119. In this embodiment, the first surface 112 and the second surface 114 are selectively parallel, the outer sidewall 116 and the inner sidewall 118 are selectively parallel, and the inner sidewall 118 and the first surface 112 are selectively perpendicular, but The invention is not limited to this. In this embodiment, the material of the light guiding element 110 may be glass, polycarbonate (PC) or polymethyl methacrylate (PMMA). However, the present invention is not limited thereto. In other embodiments, the material of the light guiding element 110 may also be other suitable materials.
光学结构120相对于底面119设置且连接于第一表面112与外侧壁116之间。光学结构120形成于导光元件110上。在本实施例中，光学结构120的材质与导光元件110的材质可相同。换言之，光学结构120与导光元件110可为一体成型，而光学结构120可为导光元件110的部份表面。然而，本发 明不限于此，在其他实施例中，光学结构120与导光元件110也可分别制作，然后，再将光学结构120配置于导光元件110上。The optical structure 120 is disposed relative to the bottom surface 119 and is coupled between the first surface 112 and the outer sidewall 116. The optical structure 120 is formed on the light guiding element 110. In this embodiment, the material of the optical structure 120 and the material of the light guiding element 110 may be the same. In other words, the optical structure 120 and the light guiding element 110 may be integrally formed, and the optical structure 120 may be a part of the surface of the light guiding element 110. However, this issue In other embodiments, the optical structure 120 and the light guiding element 110 may be separately fabricated, and then the optical structure 120 is disposed on the light guiding element 110.
值得注意的是，光学结构120具有至少一反射面120a。在本实施例中，光学结构120包括多个微凹陷122。至少一反射面120a为多个反射面120a。每一微凹陷122具有对应的一个反射面120a。在本实施例中，每一微凹陷122除了具有反射面120a外还可具有连接于相邻的两个反射面120a之间的连接面122a。在本实施例中，每一微凹陷122的反射面120a与连接面122a可相对于导光元件110的第一表面112倾斜，且反射面120a与连接面122a的倾斜方向可相反。更进一步地说，在本实施例中，微凹陷122的反射面120a与连接面122a可直接连接，而微凹陷122可呈V字型凹陷。然而，本发明不限于此，在其他实施例中，微凹陷122也可呈其他适当形状。举例而言，在另一实施例中，微凹陷122也可为向导光元件110内部凹陷的曲面，所述微凹陷122的反射面120a也可为曲面。换言之，微凹陷122的反射面120a的型态并不限于图1所显示的相对于第一表面112倾斜的平面。It is noted that the optical structure 120 has at least one reflective surface 120a. In the present embodiment, optical structure 120 includes a plurality of micro-pits 122. The at least one reflecting surface 120a is a plurality of reflecting surfaces 120a. Each micro-recess 122 has a corresponding one of the reflective surfaces 120a. In the present embodiment, each of the micro-pits 122 may have a connecting surface 122a connected between the adjacent two reflecting surfaces 120a in addition to the reflecting surface 120a. In this embodiment, the reflective surface 120a and the connecting surface 122a of each micro-pit 122 may be inclined with respect to the first surface 112 of the light guiding element 110, and the oblique direction of the reflective surface 120a and the connecting surface 122a may be opposite. Further, in the present embodiment, the reflective surface 120a of the micro-pit 122 may be directly connected to the connecting surface 122a, and the micro-recess 122 may be a V-shaped recess. However, the invention is not limited thereto, and in other embodiments, the micro-pits 122 may also have other suitable shapes. For example, in another embodiment, the micro-recess 122 may also be a curved surface that is recessed inside the light guiding element 110, and the reflective surface 120a of the micro-recess 122 may also be a curved surface. In other words, the shape of the reflecting surface 120a of the micro-pit 122 is not limited to the plane inclined with respect to the first surface 112 as shown in FIG.
光源130设置于导光元件110的底面119旁。举例而言，在本实施例中，生物辨识装置100可选择性地包括支撑物192。支撑物192由底面119向光源130所在侧延伸，以维持底面119与光源130之间的间隙。在本实施例中，支撑物192可与导光元件110、电路板160或光源130一体成型，或为导光元件110、电路板160及光源130以外的构件，本发明并不加以限制。生物辨识装置100还可包括光学胶194。光学胶194可填入导光元件110的底面119与光源130之间的间隙，以减少光束L在入射导光元件110前的损失。需说明的是，上述的支撑物192、导光元件110的底面119、电路板160及其相对关系仅是用以举例说明光源130设置于底面119旁的一种方式。在其他实施例中，生物辨识装置100也可不包括支撑物192，而用其他适当方式将光源130设置于底面119旁。举例而言，在另一实施例中，生物辨识装置100可不包括支撑物192，导光元件110的底面119可具有凹陷(未显示)，光源130可选择性地配置于底面119的凹陷与电路板160围出的空间中。在另一实施例中，生物辨识装置100可不包括支撑物192，导光元件110的底面119可不具凹陷，而电路板160可具有凹陷(未显示)，光源130可配置于电路板160的所述凹陷中，导光元件110的底面119配置于电路板160的所 述凹陷上方，而光束L也可自不具凹陷的底面119进入导光元件110。The light source 130 is disposed beside the bottom surface 119 of the light guiding element 110. For example, in the present embodiment, the biometric device 100 can optionally include a support 192. The support 192 extends from the bottom surface 119 toward the side of the light source 130 to maintain a gap between the bottom surface 119 and the light source 130. In this embodiment, the support 192 may be integrally formed with the light guiding element 110, the circuit board 160 or the light source 130, or be a member other than the light guiding element 110, the circuit board 160, and the light source 130, and the invention is not limited thereto. The biometric device 100 can also include an optical glue 194. The optical glue 194 can fill the gap between the bottom surface 119 of the light guiding element 110 and the light source 130 to reduce the loss of the light beam L before entering the light guiding element 110. It should be noted that the support 192, the bottom surface 119 of the light guiding element 110, the circuit board 160 and their relative relationship are only one way to illustrate that the light source 130 is disposed beside the bottom surface 119. In other embodiments, the biometric device 100 may also include the support 192, while the light source 130 is disposed adjacent to the bottom surface 119 in other suitable manners. For example, in another embodiment, the biometric device 100 may not include the support 192, the bottom surface 119 of the light guiding element 110 may have a recess (not shown), and the light source 130 may be selectively disposed on the recess and the circuit of the bottom surface 119. The space enclosed by the board 160. In another embodiment, the biometric device 100 may not include the support 192, the bottom surface 119 of the light guiding element 110 may not have a recess, and the circuit board 160 may have a recess (not shown), and the light source 130 may be disposed on the circuit board 160. In the recess, the bottom surface 119 of the light guiding element 110 is disposed on the circuit board 160 Above the recess, the light beam L can also enter the light guiding element 110 from the bottom surface 119 without the recess.
光源130用以发出光束L。在本实施例中，光束L例如是不可见光(例如：红外光)。但本发明不限于此，在其他实施例中，光束L也可以是可见光(例如：红光、蓝光、绿光或其组合)或可见光与不可见光的组合。在本实施例中，光源130例如为发光二极体。但本发明不限于此，在其他实施例中，光源130也可为其他适当种类的发光元件。图1所示二个光源130为示例，且光源130设置在导光元件110的相对两侧。但本发明不限于此，在其他实施例中，光源130的数量也可为单个且设置在导光元件110的单侧，或者光源130的数量也可为三个以上且设置在导光元件110的三个以上的侧边。The light source 130 is used to emit the light beam L. In the present embodiment, the light beam L is, for example, invisible light (for example, infrared light). However, the present invention is not limited thereto. In other embodiments, the light beam L may also be visible light (for example, red light, blue light, green light, or a combination thereof) or a combination of visible light and invisible light. In the embodiment, the light source 130 is, for example, a light emitting diode. However, the present invention is not limited thereto, and in other embodiments, the light source 130 may be other suitable types of light-emitting elements. The two light sources 130 shown in FIG. 1 are exemplified, and the light sources 130 are disposed on opposite sides of the light guiding element 110. However, the present invention is not limited thereto. In other embodiments, the number of the light sources 130 may be single and disposed on one side of the light guiding element 110, or the number of the light sources 130 may be three or more and disposed on the light guiding element 110. More than three sides.
影像撷取元件140相对于导光元件110的第二表面114设置。影像撷取元件具有光接收面140a。光接收面140a朝向导光元件110的第二表面114。详言之，在本实施例中，生物辨识装置100还包括电路板160，影像撷取元件140可配置于电路板160上且与电路板160电性连接。更进一步地说，在本实施例中，影像撷取元件140可配置于导光元件110的凹槽110a与电路板160所围出的空间内，但本发明不以此为限。影像撷取元件140具有阵列排列的多个像素(pixel)区142，以接收被待辨识物10反射的光束L，进而取得待辨识物10的影像。在本实施例中，影像撷取元件140可为电荷耦合元件(charge-coupled device；CCD)、互补金属氧化物半导体(complementary metal oxide semiconductor；CMOS)或其他适当种类的图像传感器阵列。The image capture component 140 is disposed relative to the second surface 114 of the light guide component 110. The image capturing element has a light receiving surface 140a. The light receiving surface 140a faces the second surface 114 of the light guiding element 110. In detail, in the embodiment, the biometric device 100 further includes a circuit board 160. The image capturing component 140 can be disposed on the circuit board 160 and electrically connected to the circuit board 160. Further, in the embodiment, the image capturing component 140 can be disposed in the space surrounded by the recess 110a of the light guiding component 110 and the circuit board 160, but the invention is not limited thereto. The image capturing component 140 has a plurality of pixel regions 142 arranged in an array to receive the light beam L reflected by the object to be recognized 10, thereby obtaining an image of the object 10 to be identified. In this embodiment, the image capturing component 140 can be a charge-coupled device (CCD), a complementary metal oxide semiconductor (CMOS), or other suitable type of image sensor array.
在本实施例中，生物辨识装置100还包括透光元件170。透光元件170配置于导光元件110的第一表面112上。透光元件170具有背向导光元件110的按压面172。按压面172供待辨识物10按压。在本实施例中，于正常的使用情况下，待辨识物10可为生物的生物特征，例如：指纹、静脉、掌纹或上述至少二者的组合等。然而，本发明不限于此，于不正常的使用情况下，待辨识物10也可能是伪造物，例如：假手指。在本实施例中，生物辨识装置100还包括光学胶180。透光元件170可透过光学胶180与导光元件110的第一表面112连接。在本实施例中，透光元件170、光学胶180及导光元件110的折射率可相同或相近，以减少光束L在透光元件170与光学胶180的交界及光学胶180与导光元件110的交界的反射，以提升生物辨识装置100的光利用效率和/或取像品质。然而，本发明不限于此，在其他实施例中，透光元 件170、光学胶180及导光元件110的折射率也可相异。In the present embodiment, the biometric device 100 further includes a light transmissive element 170. The light transmissive element 170 is disposed on the first surface 112 of the light guiding element 110. The light transmissive element 170 has a pressing surface 172 that is opposite to the light guiding element 110. The pressing surface 172 is pressed by the object to be recognized 10. In the present embodiment, under normal use, the object to be identified 10 may be a biological feature of a living being, such as a fingerprint, a vein, a palm print, or a combination of at least two of the above. However, the present invention is not limited thereto, and in the case of abnormal use, the object to be identified 10 may also be a forgery such as a fake finger. In the present embodiment, the biometric device 100 further includes an optical glue 180. The light transmissive element 170 is connectable to the first surface 112 of the light guiding element 110 through the optical adhesive 180. In this embodiment, the refractive indices of the light transmissive element 170, the optical adhesive 180, and the light guiding element 110 may be the same or similar to reduce the boundary between the light transmitting element 170 and the optical adhesive 180 and the optical adhesive 180 and the light guiding component. The reflection of the junction of 110 enhances the light utilization efficiency and/or image quality of the biometric device 100. However, the present invention is not limited thereto, and in other embodiments, the light transmitting element The refractive indices of the member 170, the optical adhesive 180, and the light guiding member 110 may also be different.
值得注意的是，光束L自底面119进入导光元件110后会被光学结构120的至少一反射面120a反射，以向第一表面112与第二表面114之间的区域110b传递。藉此，光束L耦入导光元件110的工作区(即区域110b)的效率可提升，进而增加生物辨识装置100的光利用效率。举例而言，在本实施例中，光束L穿过底面119后可被微凹陷122的反射面120a反射，以使光束L向第一表面112与第二表面114之间的区域110b传递。It should be noted that the light beam L enters the light guiding element 110 from the bottom surface 119 and is reflected by the at least one reflecting surface 120a of the optical structure 120 to be transmitted to the region 110b between the first surface 112 and the second surface 114. Thereby, the efficiency of coupling the light beam L into the working area of the light guiding element 110 (ie, the region 110b) can be improved, thereby increasing the light utilization efficiency of the biometric device 100. For example, in the present embodiment, the light beam L passes through the bottom surface 119 and is reflected by the reflective surface 120a of the micro-recess 122 to transmit the light beam L to the region 110b between the first surface 112 and the second surface 114.
在本实施例中，生物辨识装置100还可包括反射层196。反射层196覆盖光学结构120。详言之，在本实施例中，反射层196可覆盖微凹陷122的反射面120a与连接面122a，而不覆盖导光元件110的工作区(即区域110b)。光束L自底面119进入导光元件110后可被反射层196反射，以向第一表面112与第二表面114之间的区域110b传递。藉此，更多的光束L能耦入导光元件110的工作区(即区域110b)，而更进一步地提升生物辨识装置100的光利用效率。在本实施例中，反射层196例如为金属薄膜。然而，本发明不限于此，在其他实施例中，反射层196也可为其他适当材料。In the present embodiment, the biometric device 100 may further include a reflective layer 196. Reflective layer 196 covers optical structure 120. In detail, in the present embodiment, the reflective layer 196 can cover the reflective surface 120a and the connection surface 122a of the micro-pit 122 without covering the working area of the light guiding element 110 (ie, the region 110b). After entering the light guiding element 110 from the bottom surface 119, the light beam L can be reflected by the reflective layer 196 to be transmitted to the region 110b between the first surface 112 and the second surface 114. Thereby, more light beams L can be coupled into the working area of the light guiding element 110 (ie, the region 110b), and the light utilization efficiency of the biometric device 100 can be further improved. In the present embodiment, the reflective layer 196 is, for example, a metal thin film. However, the invention is not limited thereto, and in other embodiments, the reflective layer 196 may also be other suitable materials.
在本实施例中，生物辨识装置100还可包括准直元件150。准直元件150配置于导光元件110的第二表面114与影像撷取元件140之间。在本实施例中，准直元件150可透过光学胶(未显示)与影像撷取元件140连接，但本发明不以此为限。值得注意的是，准直元件150具有多个透光区152。多个透光区152分别对应影像撷取元件140的多个像素区142。被待辨识物10的每一处反射的光束L可通过对应的一个透光区152传递至对应的像素区142，而不易传递至其他像素区142。藉此，生物辨识装置100的取像品质能进一步地提升。但本发明不限于此，在其他实施例中，生物辨识装置100也可选择性地不包括准直元件150。In the present embodiment, the biometric device 100 can also include a collimating element 150. The collimating element 150 is disposed between the second surface 114 of the light guiding element 110 and the image capturing element 140. In the present embodiment, the collimating element 150 can be connected to the image capturing element 140 through an optical glue (not shown), but the invention is not limited thereto. It is noted that the collimating element 150 has a plurality of light transmissive regions 152. The plurality of light transmissive regions 152 respectively correspond to the plurality of pixel regions 142 of the image capturing component 140. The light beam L reflected by each of the objects to be identified 10 can be transmitted to the corresponding pixel region 142 through the corresponding one of the light transmitting regions 152, and is not easily transferred to the other pixel regions 142. Thereby, the image capturing quality of the biometric device 100 can be further improved. However, the present invention is not limited thereto, and in other embodiments, the biometric device 100 may optionally not include the collimating element 150.
图2为本发明另一实施例的生物辨识装置的剖面示意图。图2的生物辨识装置100A与图1的生物辨识装置100类似，两者的差异在于，生物辨识装置100A的导光元件110的形状与生物辨识装置100的导光元件110的形状不同。详言之，在图2的实施例中，导光元件110的外侧壁116及内侧壁118可相对于第一表面112倾斜，凹槽110a的内径D可随着远离第一表面112而增加。生物辨识装置100A具有与生物辨识装置100类似的功效与优点， 于此便不再重述。2 is a cross-sectional view of a biometric device according to another embodiment of the present invention. The biometric device 100A of FIG. 2 is similar to the biometric device 100 of FIG. 1 in that the shape of the light guiding element 110 of the biometric device 100A is different from the shape of the light guiding element 110 of the biometric device 100. In particular, in the embodiment of FIG. 2, the outer sidewall 116 and the inner sidewall 118 of the light guiding element 110 can be inclined relative to the first surface 112, and the inner diameter D of the recess 110a can increase as it moves away from the first surface 112. The biometric device 100A has similar functions and advantages as the biometric device 100. This will not be repeated here.
图3为本发明又一实施例的生物辨识装置的剖面示意图。图3的生物辨识装置100B与图1的生物辨识装置100类似，两者的差异在于，生物辨识装置100B的光学结构120B与生物辨识装置100的光学结构120不同。详言之，在图3的实施例中，光学结构120B可为连接于第一表面112与外侧壁116之间的一个反射面120a。光束L自底面119进入导光元件110后会被反射面120a反射，以向第一表面112与第二表面114之间的区域110b传递。在本实施例中，反射面120a可为相对于第一表面112倾斜的平面。然而，本发明不限于此，在其他实施例中，反射面120a也可为曲面。生物辨识装置100B具有与生物辨识装置100类似的功效与优点，于此便不再重述。3 is a cross-sectional view showing a biometric device according to still another embodiment of the present invention. The biometric device 100B of FIG. 3 is similar to the biometric device 100 of FIG. 1 in that the optical structure 120B of the biometric device 100B is different from the optical structure 120 of the biometric device 100. In particular, in the embodiment of FIG. 3, optical structure 120B can be a reflective surface 120a that is coupled between first surface 112 and outer sidewall 116. After entering the light guiding element 110 from the bottom surface 119, the light beam L is reflected by the reflecting surface 120a to be transmitted to the region 110b between the first surface 112 and the second surface 114. In the present embodiment, the reflecting surface 120a may be a plane inclined with respect to the first surface 112. However, the present invention is not limited thereto, and in other embodiments, the reflecting surface 120a may also be a curved surface. The biometric device 100B has similar functions and advantages as the biometric device 100 and will not be repeated here.
综上所述，本发明一实施例的生物辨识装置包括导光元件、光学结构、光源及影像撷取元件。光学结构连接于导光元件的第一表面与外侧壁之间且相对于导光元件的底面设置。光学结构具有至少一反射面。利用光学结构的至少一反射面能反射来自导光元件的底面的光束，以使光束向导光元件的第一表面与第二表面之间传递。藉此，光束耦入导光元件的工作区的效率提升，进而增加生物辨识装置的光利用效率。In summary, the biometric device according to an embodiment of the invention includes a light guiding component, an optical structure, a light source, and an image capturing component. The optical structure is coupled between the first surface and the outer sidewall of the light guiding element and disposed opposite to the bottom surface of the light guiding element. The optical structure has at least one reflective surface. At least one reflective surface of the optical structure is used to reflect the light beam from the bottom surface of the light guiding element such that the light beam is transmitted between the first surface and the second surface of the light element. Thereby, the efficiency of the light beam coupled into the working area of the light guiding element is increased, thereby increasing the light utilization efficiency of the biometric device.
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 (9)

  1. 一种生物辨识装置，其特征在于，包括：A biometric device, comprising:
    导光元件，包括：Light guiding elements, including:
    第一表面；First surface
    第二表面，相对于所述第一表面设置；a second surface disposed relative to the first surface;
    内侧壁，与所述第二表面连接且与所述第二表面形成凹槽；An inner sidewall connected to the second surface and forming a groove with the second surface;
    外侧壁，与所述第一表面连接且相对于所述内侧壁设置；以及An outer sidewall coupled to the first surface and disposed relative to the inner sidewall; and
    底面，相对于所述第一表面设置且连接于所述内侧壁与所述外侧壁之间；a bottom surface disposed relative to the first surface and connected between the inner sidewall and the outer sidewall;
    光学结构，相对于所述底面设置且连接于所述第一表面与所述外侧壁之间，其中所述光学结构具有至少一反射面；An optical structure disposed opposite to the bottom surface and coupled between the first surface and the outer sidewall, wherein the optical structure has at least one reflective surface;
    光源，设置于所述导光元件的所述底面旁且用以发出光束，其中所述光束自所述底面进入所述导光元件后被所述光学结构的所述至少一反射面反射，以向所述第一表面与所述第二表面之间的区域传递；以及a light source disposed adjacent to the bottom surface of the light guiding element and configured to emit a light beam, wherein the light beam is reflected by the at least one reflective surface of the optical structure after entering the light guiding element from the bottom surface, to Passing to a region between the first surface and the second surface;
    影像撷取元件，相对于所述导光元件的所述第二表面设置。An image capturing element is disposed relative to the second surface of the light guiding element.
  2. 根据权利要求1所述的生物辨识装置，其特征在于，所述光学结构包括：The biometric device according to claim 1, wherein the optical structure comprises:
    多个微凹陷，形成于所述导光元件上，其中至少一反射面为多个反射面，而所述多个微凹陷分别具有所述多个反射面。A plurality of micro-pits are formed on the light guiding element, wherein at least one reflecting surface is a plurality of reflecting surfaces, and the plurality of micro-pits respectively have the plurality of reflecting surfaces.
  3. 根据权利要求1所述的生物辨识装置，其特征在于，至少一反射面为一个反射面，而所述光学结构为直接连接于所述第一表面与所述外侧壁之间的所述一个反射面。The biometric device according to claim 1, wherein at least one reflecting surface is a reflecting surface, and said optical structure is said one reflection directly connected between said first surface and said outer side wall surface.
  4. 根据权利要求1所述的生物辨识装置，其特征在于，所述生物辨识装置还包括：The biometric device according to claim 1, wherein the biometric device further comprises:
    反射层，覆盖所述光学结构，其中所述光束自所述底面进入所述导光元件后被所述反射层反射，以向所述第一表面与所述第二表面之间的所述区域传递。a reflective layer covering the optical structure, wherein the light beam is reflected by the reflective layer after entering the light guiding element from the bottom surface to the area between the first surface and the second surface transfer.
  5. 根据权利要求1所述的生物辨识装置，其特征在于，所述影像撷取元件位于所述凹槽中且具有光接收面，而所述光接收面朝向所述导光元件的所述第二表面。The biometric device according to claim 1, wherein the image capturing element is located in the groove and has a light receiving surface, and the light receiving surface faces the second of the light guiding element surface.
  6. 根据权利要求1所述的生物辨识装置，其特征在于，所述生物辨识装 置还包括：The biometric device according to claim 1, wherein said biometric device The return includes:
    电路板，其中所述影像撷取元件配置于所述电路板上且与所述电路板电性连接，而所述影像撷取元件位于所述凹槽与所述电路板围出的空间中。a circuit board, wherein the image capturing component is disposed on the circuit board and electrically connected to the circuit board, and the image capturing component is located in a space surrounded by the recess and the circuit board.
  7. 根据权利要求1所述的生物辨识装置，其特征在于，所述生物辨识装置还包括：The biometric device according to claim 1, wherein the biometric device further comprises:
    准直元件，配置于所述导光元件的所述第二表面与所述影像撷取元件之间。a collimating element disposed between the second surface of the light guiding element and the image capturing element.
  8. 根据权利要求1所述的生物辨识装置，其特征在于，所述生物辨识装置还包括：The biometric device according to claim 1, wherein the biometric device further comprises:
    透光元件，配置于所述导光元件的所述第一表面上，其中所述透光元件具有按压面，以供待辨识物按压。The light transmissive element is disposed on the first surface of the light guiding element, wherein the light transmissive element has a pressing surface for pressing the object to be recognized.
  9. 根据权利要求8所述的生物辨识装置，其特征在于，所述待辨识物包括指纹、静脉、掌纹或其组合。 The biometric device according to claim 8, wherein the object to be identified comprises a fingerprint, a vein, a palm print or a combination thereof.
PCT/CN2017/078385 2016-12-23 2017-03-28 Biometric identification device WO2018113121A1 (en)

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