WO2015192630A1 - 图像采集装置、终端设备、液晶终端设备及图像采集方法 - Google Patents

图像采集装置、终端设备、液晶终端设备及图像采集方法 Download PDF

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Publication number
WO2015192630A1
WO2015192630A1 PCT/CN2014/095140 CN2014095140W WO2015192630A1 WO 2015192630 A1 WO2015192630 A1 WO 2015192630A1 CN 2014095140 W CN2014095140 W CN 2014095140W WO 2015192630 A1 WO2015192630 A1 WO 2015192630A1
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Prior art keywords
liquid crystal
imaging
light guide
image
guide plate
Prior art date
Application number
PCT/CN2014/095140
Other languages
English (en)
French (fr)
Inventor
张明方
Original Assignee
深圳印象认知技术有限公司
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Filing date
Publication date
Application filed by 深圳印象认知技术有限公司 filed Critical 深圳印象认知技术有限公司
Priority to KR1020187019320A priority Critical patent/KR101909617B1/ko
Priority to US15/320,243 priority patent/US10083335B2/en
Priority to KR1020177001867A priority patent/KR20170030536A/ko
Priority to PCT/CN2014/095140 priority patent/WO2015192630A1/zh
Priority to RU2017101728A priority patent/RU2659483C1/ru
Priority to JP2017518390A priority patent/JP6340480B2/ja
Priority to EP14894969.6A priority patent/EP3159825A4/en
Publication of WO2015192630A1 publication Critical patent/WO2015192630A1/zh

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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
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/117—Identification of persons
    • A61B5/1171—Identification of persons based on the shapes or appearances of their bodies or parts thereof
    • A61B5/1172—Identification of persons based on the shapes or appearances of their bodies or parts thereof using fingerprinting
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G06F1/1643—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being associated to a digitizer, e.g. laptops that can be used as penpads
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1684—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F18/00—Pattern recognition
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
    • G06F21/31—User authentication
    • G06F21/32—User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/145—Illumination specially adapted for pattern recognition, e.g. using gratings
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/147—Details of sensors, e.g. sensor lenses
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side

Definitions

  • the invention relates to the technical field of image acquisition, and particularly relates to an ultra-thin image acquisition device, a terminal device, a liquid crystal terminal device and an image acquisition method.
  • the optical components for carrying fingerprints and palm prints mostly include a prism 1', one side of the prism is provided with a light source 2', and the other side is provided with a photosensitive device 3.
  • the thickness of the triangular prism 1' is large, and even if other optical lenses are used to carry the fingerprint, there is a problem that the optical lens is thick.
  • most of the existing acquisition devices use too many optical components, resulting in a larger size and thicker collection device.
  • the optical fingerprint and palmprint acquisition device in Figure 1 above has been used for collecting fingerprints. There are already many unsatisfactory places, but if it is applied to the palm print, the palm print is obviously larger than the fingerprint. Therefore, it is necessary to apply a larger prism, and more lenses and photosensitive devices.
  • the shape structure of the prism determines the larger the surface on which the fingerprint or palm print is carried, and the larger the volume, the fingerprint and palm print are applied. The larger the device, the higher the cost.
  • fingerprint and palmprint acquisition devices are more and more widely used in portable electronic products, such as mobile phones, notebooks, tablet notebooks, etc. On the product.
  • the size of existing optical fingerprints and palmprint acquisition devices is difficult to meet the ultra-thin size requirements of existing electronic products.
  • the ultra-thin fingerprint and palmprint acquisition device of the semiconductor chip is extremely expensive on the one hand, and the aesthetics is low on the other hand, which cannot satisfactorily meet the demand for ultra-thinness of the existing electronic products.
  • Optical collectors are also too thick and difficult to meet the ultra-thin requirements of ultra-thin electronic products.
  • the present invention provides an image acquisition device, a terminal device, a liquid crystal terminal device and an image acquisition method, wherein the image acquisition device has a compact structure and a thin thickness, so that the size and thickness of the image acquisition module in the terminal device and the liquid crystal terminal device are greatly increased. Reduced, the cost is reduced.
  • an image capture device including:
  • a light source for injecting light into the light guide plate, the light source being disposed at one side of the light guide plate;
  • An image collector for collecting an image of a detected object on a light guide plate, the image collector being spaced apart from the light guide plate.
  • the image collector includes an imaging plate disposed at an interval from the light guide plate, and the imaging plate is provided with at least one imaging hole, and the other surface of the imaging plate is provided with at least one photosensitive component corresponding to the imaging hole.
  • the distance from the one side of the light guide plate to the midpoint of the imaging hole axis line is the object distance h object , and the object distance h object satisfies the formula: Where r is the center-to-center spacing of the adjacent two imaging apertures and ⁇ is the field of view of the imaging aperture.
  • the hole center distance r of two adjacent imaging holes satisfies the formula: r ⁇ 2 ⁇ h image tg( ⁇ /2), where h image is the image distance, which is the distance from the photosensitive member to the midpoint of the imaging hole axis line. , ⁇ is the angle of view of the imaging aperture.
  • the imaging hole has a diameter of 0.001 mm to 1 mm
  • the imaging plate has a thickness of 0.005 mm to 5 mm
  • the light guide plate has a thickness of 0.1 mm to 5 mm.
  • a filter is disposed between the imaging hole and the photosensitive component.
  • a correcting lens is disposed on either or both sides of the imaging hole.
  • the image capture device includes at least one lens spaced apart from the light guide plate, and the other side of the lens is spaced apart from at least one photosensitive member.
  • a terminal device includes the image capture device.
  • a terminal device includes a light guide plate and a display panel spaced apart from the light guide plate, and one side of the light guide plate is provided with a light source for injecting at least part of light into the light guide plate, and the display panel is used as an imaging plate,
  • the display panel is provided with at least one imaging aperture, and the other side of the display panel is provided with at least one photosensitive component corresponding to the imaging aperture.
  • a distance from a side of the light guide plate to a midpoint of the imaging hole axis line is an object distance h object , and the object distance h object satisfies the formula: Where r is the center-to-center spacing of the adjacent two imaging apertures and ⁇ is the field of view of the imaging aperture.
  • the hole center distance r of two adjacent imaging holes satisfies the formula: r ⁇ 2 ⁇ h image tg( ⁇ /2), where h image is the image distance, which is the distance from the photosensitive member to the midpoint of the imaging hole axis line. , ⁇ is the angle of view of the imaging aperture.
  • a terminal device includes a light guide plate and a display panel spaced apart from the light guide plate, and one side of the light guide plate is provided with a light source for injecting at least part of light into the light guide plate, and the display panel is provided with at least one light passing through The other side of the display panel is provided with at least one lens corresponding to the light-passing hole, and the other side of the lens is provided with at least one photosensitive component.
  • a liquid crystal terminal device comprising a liquid crystal display component, wherein the liquid crystal display component comprises a liquid crystal panel, a backlight module, and the image capturing device, wherein
  • the liquid crystal panel is disposed between the light guide plate of the image capture device and the image collector;
  • the backlight module includes a reflective sheet, a back sheet, and at least one optical sheet disposed between the reflective sheet and the liquid crystal panel.
  • An image collector is disposed between the reflective sheet and the back sheet, and corresponding image collection is performed on the reflective sheet.
  • the position of the device is provided with a through hole, and the position of the optical film corresponding to the through hole is provided with a light transmitting portion.
  • a liquid crystal terminal device comprising a liquid crystal display component, wherein the liquid crystal display component comprises a liquid crystal panel, a backlight module, and the image capturing device, wherein
  • the liquid crystal panel is disposed between the light guide plate of the image capture device and the image collector, and the backlight module is disposed between the liquid crystal panel and the image collector;
  • the backlight module includes a reflective sheet, a back plate, and at least one optical film disposed between the reflective sheet and the liquid crystal panel.
  • the reflective sheet and the corresponding image collector on the back panel are respectively provided with a first through hole. And a second through hole, wherein the optical film is provided with a light transmitting portion at a position corresponding to the first through hole and the second through hole.
  • a liquid crystal terminal device comprising a liquid crystal display device, wherein the liquid crystal display device comprises a liquid crystal panel, a backlight module disposed on one side of the liquid crystal panel, and a light guide plate disposed on the other side of the liquid crystal panel, one side of the light guide panel a light source is disposed, the backlight module includes a reflective sheet, a back sheet, and at least one optical film disposed between the reflective sheet and the liquid crystal panel, and a photosensitive component is disposed between the reflective sheet and the back sheet
  • the reflective sheet is used as an imaging plate, and the imaging plate is provided with at least one imaging hole at a position corresponding to the photosensitive component, the imaging hole is spaced apart from the photosensitive component, and the position of the optical film corresponding to the imaging hole is set to be transparent. Light department.
  • a liquid crystal terminal device includes a liquid crystal display device, wherein the liquid crystal display device includes a liquid crystal panel, a backlight module disposed on one side of the liquid crystal panel, and a light guide plate disposed on the other side of the liquid crystal panel, and one side of the light guide panel is disposed a light source, the backlight module includes a reflective sheet, a back sheet, and at least one optical film disposed between the reflective sheet and the liquid crystal panel, and the other side of the back panel is provided with at least one photosensitive component for the reflection
  • the sheet and the back plate are integrally formed as an imaging plate, and the image forming plate is provided with at least one imaging hole at a position corresponding to the photosensitive member, and the photosensitive member is spaced apart from the imaging hole, and the position of the optical film corresponding to the imaging hole is A light transmitting portion is provided.
  • a liquid crystal terminal device comprising a liquid crystal display component, wherein the liquid crystal display component comprises a liquid crystal panel and a backlight module, wherein the liquid crystal panel is used as a light guide plate, and one side of the light guide plate is provided with a light source, and the backlight module
  • the invention comprises a reflective sheet, a back sheet and at least one optical film disposed between the reflective sheet and the liquid crystal panel, and at least one photosensitive component is disposed between the reflective sheet and the back sheet, and the reflective sheet is used as an imaging plate. At least one imaging hole is disposed at a position corresponding to the photosensitive component on the imaging plate, and the imaging hole is spaced apart from the photosensitive component, and a position corresponding to the imaging hole on the optical film is disposed with a light transmitting portion.
  • a liquid crystal terminal device comprising a liquid crystal display component, wherein the liquid crystal display component comprises a liquid crystal panel and a backlight module, wherein the liquid crystal panel is used as a light guide plate, and one side of the light guide plate is provided with a light source, and the backlight module
  • the invention comprises a reflective sheet, a back sheet and at least one optical film disposed between the reflective sheet and the liquid crystal panel, and the other side of the back sheet is provided with at least one photosensitive component, and the reflective sheet and the back panel are integrally used as an imaging plate. At least one imaging hole is disposed at a position corresponding to the photosensitive component on the imaging plate, the photosensitive component is spaced apart from the imaging hole, and a position corresponding to the imaging hole on the optical film is disposed with a light transmitting portion.
  • the distance from the one side of the light guide plate to the midpoint of the imaging hole axis line is the object distance h object , and the object distance h object satisfies the formula: Where r is the center-to-center spacing of the adjacent two imaging apertures and ⁇ is the field of view of the imaging aperture.
  • the hole center distance r of two adjacent imaging holes satisfies the formula: r ⁇ 2 ⁇ h image tg( ⁇ /2), where h image is the image distance, which is the distance from the photosensitive member to the midpoint of the imaging hole axis line. , ⁇ is the angle of view of the imaging aperture.
  • An image acquisition method of the image capture device comprising the following steps:
  • At least part of the light emitted by the light source is incident into the light guide plate, so that at least part of the light incident into the light guide plate is totally reflected and transmitted;
  • An image of the object to be detected on the other side of the light guide plate is collected by an image collector.
  • the image of the detected object on the other side of the light guide plate is collected by the image collector, and specifically includes:
  • the images of the respective imaged regions obtained by the scanning are spliced to obtain a complete image of the detected object.
  • An image acquisition method for the liquid crystal terminal device comprising the following steps:
  • At least part of the light emitted by the light source is incident into the light guide plate, so that at least part of the light incident into the light guide plate is totally reflected and transmitted;
  • Image acquisition is performed on the object on the other side of the light guide plate remote from the liquid crystal panel by the image collector on one side of the liquid crystal panel.
  • the image collection of the object to be detected on the other side of the light guide plate remote from the liquid crystal panel by the image collector on one side of the liquid crystal panel is specifically as follows:
  • the images of the respective imaged regions obtained by the scanning are spliced to obtain a complete image of the detected object.
  • the image collection of the object to be detected on the other side of the light guide plate remote from the liquid crystal panel by the image collector on one side of the liquid crystal panel is specifically as follows:
  • the images of the respective imaged regions obtained by the scanning are spliced to obtain a complete image of the detected object.
  • the image collecting device, the terminal device, the liquid crystal terminal device and the image collecting method of the invention have the following advantages:
  • the thickness of the imaging light source is reduced in thickness, and then the ultra-thin light guide plate is used to reflect the detected object, thereby reducing the thickness of the optical mirror surface for generating the image of the detected object, and finally forming the collection using the compact imaging plate and the photosensitive member.
  • the device or the lens and the photosensitive component form a collector, further reducing the thickness of the collected portion of the detected object, and combining several parts to form an ultra-thin image capturing device and terminal device whose thickness is greatly reduced compared with the thickness of the conventional optical collector. , liquid crystal terminal equipment;
  • the image acquisition device of the invention is integrated on the terminal device or the liquid crystal liquid end device, so that the terminal device and the liquid crystal terminal device add a fingerprint collection function and/or a palm print collection function, and the terminal device and the liquid crystal terminal device additionally add components. Less and low cost.
  • FIG. 1 is a schematic structural view of a fingerprint and palm print collection device in the prior art
  • Embodiment 1 of an image capture device of the present invention is a schematic structural view of Embodiment 1 of an image capture device of the present invention
  • Embodiment 2 is a schematic structural view of Embodiment 2 of an image capture device of the present invention.
  • FIG. 4A is a schematic structural view of a third embodiment of an image capture device of the present invention.
  • FIG. 4B is a top plan view of the image scanning area of FIG. 4A;
  • Embodiment 4 is a schematic structural view of Embodiment 4 of an image capture device of the present invention.
  • Embodiment 1 of a terminal device according to the present invention is a schematic structural diagram of Embodiment 1 of a terminal device according to the present invention.
  • Embodiment 7 is a schematic structural diagram of Embodiment 2 of a terminal device according to the present invention.
  • Embodiment 8 is a schematic structural diagram of Embodiment 3 of a terminal device according to the present invention.
  • Embodiment 4 of a terminal device of the present invention is a schematic structural diagram of Embodiment 4 of a terminal device of the present invention.
  • Embodiment 1 of a liquid crystal terminal device of the present invention
  • Embodiment 11 is a schematic structural view of Embodiment 2 of a liquid crystal terminal device of the present invention.
  • Embodiment 3 of a liquid crystal terminal device of the present invention is a schematic structural view of Embodiment 3 of a liquid crystal terminal device of the present invention.
  • Embodiment 4 of a liquid crystal terminal device of the present invention is a schematic structural view of Embodiment 4 of a liquid crystal terminal device of the present invention.
  • Embodiment 5 of a liquid crystal terminal device of the present invention is a schematic structural view of Embodiment 5 of a liquid crystal terminal device of the present invention.
  • Embodiment 6 of a liquid crystal terminal device of the present invention
  • Figure 16 is a schematic structural view of a seventh embodiment of the liquid crystal terminal device of the present invention.
  • FIG. 17 is a schematic diagram of a plurality of fingerprint images collected by using the liquid crystal terminal device of FIG. 16;
  • Embodiment 8 of a liquid crystal terminal device of the present invention is a schematic structural view of Embodiment 8 of a liquid crystal terminal device of the present invention.
  • Embodiment 9 of a liquid crystal terminal device of the present invention
  • Figure 21 is a schematic view showing the structure of a tenth embodiment of the liquid crystal terminal device of the present invention.
  • FIG. 2 is a schematic structural view of an embodiment of an image capture device of the present invention, including a light guide plate 1 and an image collector spaced apart from the light guide plate 1.
  • the light guide plate 1 is widely selected, such as a glass plate and various transparent materials.
  • the image collector of the embodiment is disposed under the light guide plate 1.
  • One side of the light guide plate 1 is provided with a light source 2.
  • the light source 2 of this embodiment can be fixed to the left side of the light guide plate 1 by a bracket.
  • the image collector includes an imaging plate 3 spaced apart from the light guide plate 1, and the imaging plate 3 is disposed below the light guide plate 1.
  • an imaging hole 4 is provided on the imaging plate 3, and may be provided in plurality.
  • the other side of the imaging plate 3 (i.e., the lower surface thereof) is provided with a photosensitive member 5 corresponding to the positional interval of the imaging hole 4, and the photosensitive member 5 includes a photoelectric conversion sensor and an image processor.
  • the light emitted by the light source 2 is incident into the light guide plate 1 from the left side surface of the light guide plate 1, and at least part of the light is totally reflected and transmitted in the light guide plate 1.
  • the specific light is all transmitted in the light guide plate 1 or partially reflected. This embodiment and the following embodiments do not limit it. As long as the light has total reflection transmission, the image of the detected object can be collected. Just fine.
  • the light guide plate 1 provides the object (finger) to be pressed.
  • the light emitted by the light source 2 is incident into the light guide plate 1. At least part of the light is transmitted in the light guide plate 1 as total reflection.
  • the surface of the light guide plate 1 is projected onto the fingerprint, and the surface of the fingerprint scatters light to generate scattered light of various angles. A part of the scattered light passes through the imaging hole 4 to form a fingerprint image, which is collected by the photosensitive member 5 under the imaging plate 3.
  • At least part of the light emitted by the light source 2 is incident into the light guide plate 1, wherein at least part of the light is totally reflected and transmitted in the light guide plate 1;
  • a fingerprint image of the upper surface of the light guide plate 1 is collected by the photosensitive member 5 of the image pickup.
  • FIG. 3 is a schematic structural view of Embodiment 2 of the image capture device of the present invention, and most of the structures are the same as those of the embodiment shown in FIG. 2, except that the image capture device includes a lens 6 spaced apart from the light guide plate 1 and a lens. 6 is disposed below the light guide plate 1 in the present embodiment, and the photosensitive member 5 is disposed at intervals on the other side of the lens 6 (ie, the lower surface thereof).
  • the light emitted by the light source 2 is incident into the light guide plate 1. At least part of the light is totally reflected and transmitted in the light guide plate 1.
  • the detected object finger
  • the total reflection transmission of the light inside is destroyed, so that part of the light is projected onto the fingerprint through the surface of the light guide plate 1,
  • the surface of the fingerprint scatters light to produce scattered light at various angles, and a portion of the scattered light is refracted on the lens 6 to form a fingerprint image, which is captured by the photosensitive member 5 below the lens 6.
  • FIG. 4A is a schematic structural view of a third embodiment of the image capture device of the present invention, and most of the structures are the same as those of the embodiment shown in FIG. 2, except that the imaging plate 3 of the image capture device is provided with a plurality of imaging holes 4
  • the photosensitive plate assembly 5 is disposed at a position below the imaging plate 3 corresponding to each of the imaging holes 4, and a plurality of imaging holes 4 are disposed on the imaging plate 3 because the light guide plate 1, the imaging plate 3, and the photosensitive member 5 are disposed between the three.
  • the pitch is small, that is, when the overall thickness is small, the field of view of the single imaging hole 4 is small, and only a small portion of the fingerprint can be clearly displayed.
  • a plurality of imaging holes 4 are provided.
  • the imaging aperture 4 and the photosensitive member 5 are each set to four.
  • the distance from the one side (ie, the upper surface) of the light guide plate 1 away from the imaging plate 3 to the point O in the axis AA of the imaging hole 4 is the object distance h object .
  • the object distance h object satisfies the formula: Where r is the center-to-center spacing of the adjacent two imaging apertures 4, and ⁇ is the field of view of the imaging aperture 4, such that the fingerprint image of the scanning area is guaranteed to be intact, wherein the scanning area is defined as: the detected object (finger) On the fingerprint), the visual field corresponding to the angle of view of each imaging aperture 4 corresponds.
  • the center distance r of the holes of the adjacent two imaging holes 4 satisfies the formula: r ⁇ 2 ⁇ h image tg( ⁇ /2), where h image is the image distance, which is the midpoint of the axis of the photosensitive component 5 to the imaging hole 4
  • the distance, ⁇ is the angle of view of the imaging aperture, such that the arrangement further ensures that the image of the imaging area corresponding to each imaging aperture 4 does not overlap with each other, improving the image quality, wherein the imaging area is defined as: on the photosensitive component 5, each imaging
  • the field of view ⁇ of the aperture 4 corresponds to the sensitized range, i.e., the size of the image spot of each imaging aperture 4.
  • the thickness of the imaging plate 3 is h hole
  • the diameter of the imaging hole 4 is d hole ;
  • the imaging area diameter d image can be calculated, as shown in FIG. 4A:
  • the hole center distance r of adjacent imaging holes can be obtained:
  • the image scanning area corresponding to each imaging hole ie, on the light guide plate 1, the field of view of each imaging hole 4 may correspond to Depending on the range, the d object in the figure is the diameter
  • the image scanning area corresponding to each imaging hole ie, on the light guide plate 1, the field of view of each imaging hole 4 may correspond to Depending on the range, the d object in the figure is the diameter
  • At least part of the light emitted by the light source 2 is incident into the light guide plate 1 to cause at least part of the light incident into the light guide plate 1 to be totally reflected and propagated;
  • the partial fingerprint of each scanning area is transmitted through the imaging hole 4 of the imaging plate 3 through the photosensitive member 5 of the image collector Taking images so that the fingerprint images of the adjacent imaging regions are not aliased;
  • a partial fingerprint image of each imaging area obtained by scanning is spliced, and after image enhancement processing, a complete fingerprint image is obtained.
  • the light guide plate 1 is provided for a touch plane of a detected object such as a finger or a palm, so as to facilitate fingerprint and palm print image collection, and further protect the components below it.
  • This embodiment has all the advantages of the image acquisition device described in the embodiment of FIG. 2. Compared with the embodiment shown in FIG. 2, the embodiment can further reduce the spacing between the light guide plate 1, the imaging plate 3, and the photosensitive member 5. And does not affect the collection area of the fingerprint, only the process of splicing and cutting is added during the process of synthesizing the fingerprint.
  • the imaging aperture 4 has a diameter of 0.001 to 1 mm; the aperture of the imaging aperture 4 should be selected from 0.01 to 0.1 in consideration of an optimum imaging effect, a shorter imaging distance, and processing. Between mm, such as 0.05 mm is preferred.
  • the image forming plate 3 has a thickness of 0.005 mm to 5 mm, preferably a thickness of 0.001 mm to 5 mm, and the light guide plate 1 has a thickness of 0.1 mm to 5 mm.
  • a filter may be disposed between the imaging aperture 4 and the photosensitive member 5 for adjusting the uniformity of illumination.
  • a correcting lens can be added to either side or both sides of the imaging hole 4 to adjust the light so that a clear image is obtained when the size of the imaging hole is large.
  • FIG. 5 is a schematic structural diagram of Embodiment 4 of the image capturing apparatus of the present invention.
  • the embodiment is used for collecting palmprint images, and most of the structures are the same as those of the embodiment shown in FIG. 4A, except that the image is collected.
  • the apparatus includes a plurality of lenses 6 spaced apart from the light guide plate 1.
  • the other side (lower side) of the lens 6 is spaced apart from the plurality of photosensitive members 5, and in this embodiment, the lens 6 and the photosensitive member 5 are four.
  • At least part of the light emitted by the light source 2 is incident into the light guide plate 1 to cause at least part of the light incident into the light guide plate 1 to be totally reflected and transmitted;
  • a part of the palmprint image of each imaging area obtained by scanning is spliced, and after image enhancement processing, a complete palmprint image is obtained.
  • a plurality of lenses 6 and a plurality of photosensitive members 5 are employed in order to avoid insufficient field of view of a single lens.
  • the structure of the embodiment can also be applied to collecting fingerprint images.
  • collecting fingerprint images several smaller lenses can be utilized, and then the collected fingerprint images can be spliced.
  • FIG. 6 is a schematic structural diagram of an embodiment of a terminal device of the present invention.
  • the terminal device 7 is provided with an image collecting device 8 as described in any of the above-mentioned FIG. 1 to FIG. 5, and the image is collected.
  • the device 8 is disposed at an edge position of the terminal device 7, such as a mobile phone, which can be set on its HOME button.
  • Such an image capture device has the characteristics of simple structure and thin thickness compared with the conventional image pickup assembly.
  • FIG. 7 is a schematic structural diagram of Embodiment 2 of the terminal device of the present invention, which includes the image capturing device 8 of any of the above-mentioned FIG. 1 to FIG. 5, the image capturing device 8 is an independent device, and the terminal device 7 passes through a wire. Connected to the interface.
  • FIG. 8 is a schematic structural diagram of a third embodiment of the terminal device of the present invention, including a light guide plate 1 and a display panel 9 spaced apart from the light guide plate 1.
  • the left side of the light guide plate 1 is provided with a light source 2, and the display panel 9 is a liquid crystal screen.
  • the display panel 9 is disposed under the light guide plate 1 , and the display panel 9 is used as an imaging plate.
  • the display panel 9 is provided with at least one imaging hole 4 , which is four imaging holes 4 .
  • each of the imaging holes 4 corresponds to one photosensitive member 5, and the display panel with the plurality of imaging holes 4 9 and a plurality of photosensitive components 5 constitute an image collector.
  • the distance from the side of the light guide plate 1 away from the display panel 9 (ie, the upper surface) to the midpoint of the axial line of the imaging hole 4 is the object distance h object .
  • the object distance h object satisfies the formula: Where r is the center-to-center spacing of the adjacent two imaging apertures 4, ⁇ is the field of view angle of the imaging aperture 4, and the center-to-center spacing r of the adjacent two imaging apertures 4 satisfies the formula: r ⁇ 2 ⁇ h image tg( ⁇ /2), where h image is the image distance, which is the distance from the photosensitive element 5 to the midpoint of the axis of the imaging aperture 4, and ⁇ is the angle of view of the imaging aperture.
  • the display panel 9 serves as an imaging plate on which a plurality of imaging holes 4 are disposed.
  • the light source 2 is incident on at least a portion of the light guide plate 1. The light is totally reflected and transmitted.
  • the total reflection of the light in the light guide plate 1 is destroyed, so that part of the light is projected onto the fingerprint through the surface of the light guide plate 1, and the surface of the fingerprint scatters the light to generate The scattered light of each angle, a part of the scattered light passes through the plurality of imaging holes 4 to form a plurality of partial fingerprint images and finally spliced into a complete fingerprint image, which is collected by the photosensitive component 5 under the display panel 9.
  • a filter may be disposed between the imaging hole 4 and the photosensitive member 5 for adjusting the uniformity of illumination. It is also possible to add a correcting lens on either side or both sides of the imaging hole 4 to adjust the light. Thereby, clear imaging is still obtained when the imaging aperture 4 is large in size.
  • FIG. 9 is a schematic structural view of a fourth embodiment of the terminal device of the present invention, including a light guide plate 1 and a display panel 9 disposed under the light guide plate 1.
  • the display panel 9 is a liquid crystal screen, and the left side of the light guide plate 1 is provided with At least a portion of the light is incident on the light source 2 of the light guide plate 1 , and at least a portion of the light incident into the light guide plate 1 is totally reflected and transmitted.
  • the display panel 9 is provided with at least one light passing hole 10 .
  • the other side (lower surface) of the display panel 9 is provided with at least one lens 6 corresponding to the light-passing apertures 10. In this embodiment, a lens 6 is disposed below each of the light-passing apertures 10, and the lower surface of each lens 6 is correspondingly disposed.
  • Photosensitive component 5. The four lenses 6 and the four photosensitive members 5 constitute an image collector.
  • the total reflection transmission of the light in the light guide plate 1 is destroyed, and a part of the light is projected onto the fingerprint through the surface of the light guide plate 1, and the surface of the fingerprint scatters the light to generate scattering at various angles.
  • a part of the scattered light is refracted through the plurality of light-passing holes 10 on the plurality of lenses 6, and a plurality of partial fingerprint images are formed and finally spliced into a complete fingerprint image, which is collected by the photosensitive member 5 under the lens 6.
  • the above two embodiments only give the collection of fingerprints, and can also collect fingerprints or multiple palm prints of multiple fingers at the same time.
  • the same principle is applied to the collection of palm prints, and the difference lies only in the upper surface of the light guide plate 1.
  • the size varies.
  • FIG. 10 is a schematic structural diagram of Embodiment 1 of a liquid crystal terminal device of the present invention, which includes a liquid crystal display assembly including a liquid crystal panel 11, a backlight assembly 12 disposed under the liquid crystal panel 11, and FIGS.
  • the liquid crystal panel 11 of the embodiment selects a transparent panel body composed of two upper and lower glass panels and liquid crystal molecules sandwiched between the two glass panels, and the backlight module 12 is One or more layers of the optical film 13, the reflection sheet 14, and the back sheet 15 are sequentially included downward.
  • the liquid crystal panel 11 is disposed between the light guide plate 1 of the image capture device and the image collector 16, and the image collector 16 may be an image collector composed of an imaging plate with at least one imaging hole and at least one photosensitive component, or An image collector comprising at least one lens and at least one photosensitive component.
  • the reflection sheet 14 and the back sheet 15 are in close contact with each other.
  • a through hole 17 is disposed in the center of the reflective sheet 14.
  • a recess 18 is disposed at a position corresponding to the through hole 17 on the upper surface of the back plate 15.
  • the image collector 16 is fixed in the recess 18 on each optical film 13. Corresponding to the position of the image collector 16, a light transmitting portion is provided.
  • At least part of the light emitted by the light source 2 at the left end of the light guide plate 1 is incident into the light guide plate 1 to cause at least part of the light incident into the light guide plate 1 to be totally reflected and transmitted;
  • the through hole 17 and the optical film 13 on the reflective sheet 14 are transmitted through the image collector 16 under the liquid crystal panel 11
  • the light transmitting portion, the liquid crystal panel 11 and the light guide plate 1 perform image acquisition on the fingerprint of the upper surface of the light guide plate 1.
  • the detected object is a finger print, and may also be a palm print or a human face.
  • the light transmitting portion is disposed on the optical film 13 in order to prevent the optical film 13 from being affected by image collection when it is difficult to transmit light or opaque.
  • the optical film 13 is a light transmitting portion.
  • the light transmitting portion of the optical film 13 may be a light transmitting hole or a light transmitting sheet.
  • the imaging aperture 4 has a diameter of 0.001 to 1 mm; the aperture of the imaging aperture 4 should be selected from 0.01 to 0.1 in consideration of an optimum imaging effect, a shorter imaging distance, and processing. Between mm, such as 0.05 mm is preferred.
  • the image forming plate 3 has a thickness of 0.005 mm to 5 mm, preferably a thickness of 0.001 mm to 5 mm, and the light guide plate 1 has a thickness of 0.1 mm to 5 mm.
  • a filter may be disposed between the imaging aperture 4 and the photosensitive member 5 for adjusting the uniformity of illumination.
  • a correcting lens can be added to either side or both sides of the imaging hole 4 to adjust the light so that a clear image is obtained when the size of the imaging hole is large.
  • FIG. 11 is a schematic structural diagram of Embodiment 2 of the liquid crystal terminal device of the present invention.
  • Most of the structure of the embodiment is the same as that of the embodiment shown in FIG. 10, except that the image collector 16 is disposed under the backlight module 12.
  • the position of the corresponding image collector 16 on the reflective sheet 14 of the backlight module 12 and the corresponding image collector 16 on the back panel 15 are respectively provided with a first through hole 19 and a second through hole 20, and the optical film 13 corresponds to the first through hole 19 and the second
  • the position of the through hole 20 is provided with a light transmitting portion.
  • the liquid crystal panel 11 In use, when the liquid crystal panel 11 is in a light transmitting state, at least part of the light of the light source 2 is incident into the light guide plate 1, and at least part of the light in the light guide plate 1 is totally reflected and transmitted, and the finger is pressed on the light guide plate 1.
  • the image capture device 16 collects a fingerprint image of the upper surface of the light guide plate 1 through the second through hole 20, the second through hole 19, the light transmitting portion on the optical film 13, the liquid crystal panel 11, and the light guide plate 1.
  • Embodiments can also detect palmprint images.
  • FIG. 12 is a schematic structural view of a third embodiment of the liquid crystal terminal device of the present invention, and most of the structures are the same as those of the embodiment shown in FIG. 10, except that the photosensitive member 5 is fixed in the recessed portion 18 on the upper surface of the back plate 15.
  • the reflective sheet 14 is used as an imaging plate, and at least one imaging hole 4 is disposed on the reflective sheet 14 at a position corresponding to the photosensitive member 5.
  • the imaging hole 4 is spaced apart from the photosensitive member 5, and the optical film 13 corresponds to The position of the imaging hole 4 is provided with a light transmitting portion.
  • the liquid crystal panel 11 When the fingerprint or the palm print is collected, the liquid crystal panel 11 is in a light transmitting state in response to a control signal;
  • At least part of the light of the light source 2 is incident into the light guide plate 1 to cause at least part of the light incident into the light guide plate 1 to be totally reflected and transmitted;
  • the photosensitive member 5 of the image collector passes through the imaging hole 4, the light transmitting portion on the optical film 13, the liquid crystal panel 11, and the light guide plate 1, and then collects a fingerprint image on the upper surface of the light guide plate 1.
  • FIG. 13 is a schematic structural diagram of Embodiment 4 of a liquid crystal terminal device of the present invention, and most of the structures thereof are shown in FIG. 11
  • the embodiment is the same, except that the photosensitive member 5 is disposed on the other side of the back plate 15 (ie, under the back plate) corresponding to the liquid crystal panel 11.
  • the reflective sheet 14 and the back plate 15 are integrally used as an imaging plate.
  • An imaging hole 4 is disposed at a position corresponding to the photosensitive member 5 on the imaging plate, and the photosensitive member 5 is disposed at an interval from the imaging hole 4.
  • FIG. 14 is a schematic structural diagram of Embodiment 5 of the liquid crystal terminal device of the present invention, and the majority of the structure is the same as that of the embodiment shown in FIG. 12, except that the liquid crystal display module further includes a touch screen 21, and the touch screen 21 is located at the guide. Between the light panel 1 and the liquid crystal panel 11.
  • FIG. 15 is a schematic structural view of a sixth embodiment of the liquid crystal terminal device of the present invention.
  • the structure of the liquid crystal display device is the same as that of the embodiment shown in FIG. 13 .
  • the difference is that the liquid crystal display device further includes a touch screen 21, and the touch screen 21 is located at the guide. Between the light panel 1 and the liquid crystal panel 11.
  • the aperture of the imaging hole 4 is 0.001 to 1 mm; the imaging is considered in consideration of an optimum imaging effect, a shorter imaging distance, and processing.
  • the pore size of the pores 4 is preferably selected to be between 0.01 and 0.1 mm, such as 0.05 mm.
  • the image forming plate 3 has a thickness of 0.005 mm to 5 mm, preferably a thickness of 0.001 mm to 5 mm, and the light guide plate 1 has a thickness of 0.1 mm to 5 mm.
  • a filter may be disposed between the imaging aperture 4 and the photosensitive member 5 for adjusting the uniformity of illumination.
  • a correcting lens can be added to either side or both sides of the imaging hole 4 to adjust the light so that a clear image is obtained when the size of the imaging hole is large.
  • FIG. 16 is a schematic structural view of Embodiment 7 of the liquid crystal terminal device of the present invention, and most of the structures are the same as those of the embodiment shown in FIG. 15, except that the reflective sheet 14 and the back plate 15 are integrally used as an imaging plate.
  • the image forming plate is formed with a plurality of imaging holes 4.
  • the imaging holes 4 are disposed in four
  • the photosensitive member 5 is disposed in four.
  • Each of the photosensitive members 5 respectively corresponds to an imaging hole 4 up and down.
  • At least part of the light emitted by the light source 2 on the left side of the light guide plate 1 is incident into the light guide plate 1 , and at least part of the light incident into the light guide plate 1 is totally reflected and transmitted;
  • a plurality of scanning regions for the same fingerprint are established on the upper surface of the light guide plate 1.
  • This embodiment is four scanning regions, so that adjacent scanning regions overlap each other;
  • the partial fingerprint image is such that the fingerprint images of the adjacent imaging regions do not overlap each other, and each of the photosensitive members 5 respectively passes through the corresponding imaging hole 4, the light transmitting portion on the optical film 13, the liquid crystal panel 11, the touch screen 21, and the light guide plate. 1 Collecting a part of the fingerprint image in the corresponding scanning area, as shown in FIG. 17, which shows that 20 partial fingerprint images are collected;
  • the images of the imaged regions obtained by the scanning are spliced to obtain a complete fingerprint image: the repeated regions in the four partial fingerprint images are first cropped, and then spliced to obtain a complete fingerprint image, which can be referred to in FIG. 17
  • the 20 partial fingerprint images are stitched into the complete fingerprint image in Fig. 18.
  • the response-control signal may be a control signal obtained by the touch screen 21 or a control signal obtained by touching the button or a control signal obtained by responding to the remote signal, and is not enumerated here.
  • the finger fingerprint is used as the object to be detected, and the object to be detected may be other stereo or planar target objects.
  • FIG. 19 is a schematic structural view of an eighth embodiment of the liquid crystal terminal device of the present invention, and most of the structures are the same as those of the embodiment shown in FIG. 16, except that the photosensitive member 5 is provided as one.
  • the image acquisition method of the liquid crystal terminal device includes the following steps:
  • At least part of the light emitted by the light source 2 is incident into the light guide plate 1, and at least part of the light incident into the light guide plate 1 is totally reflected and transmitted;
  • a plurality of scanning regions for the same fingerprint are established on the upper surface of the light guide plate 1.
  • This embodiment is four scanning regions, so that adjacent scanning regions overlap each other;
  • a partial fingerprint image of the corresponding scanning area is collected through the imaging hole 4 and the corresponding liquid crystal area. For example, each time one liquid crystal area is controlled to be turned on, the other three liquid crystal areas are turned off, so that partial fingerprint images of each liquid crystal area can be sequentially collected.
  • the fingerprint images of the respective imaging regions are not overlapped with each other;
  • the fingerprint images of the four imaging regions are spliced and spliced to obtain a complete fingerprint image.
  • FIG. 20 is a schematic structural view of Embodiment 9 of the liquid crystal terminal device of the present invention, and most of the structures are the same as those of the embodiment shown in FIG. 12, except that the light guide plate of FIG. 12 is omitted in this embodiment. 1, the liquid crystal panel 11 is used as a light guide plate, and the light source 2 is disposed on the left side of the liquid crystal panel 11.
  • the liquid crystal panel 11 is placed in a light transmitting state, and the light source 2 is turned on, so that at least part of the light emitted by the light source 2 is incident into the liquid crystal panel 11, and at least part of the light incident into the liquid crystal panel 11 is totally reflected and transmitted.
  • the photosensitive member 5 between the reflective sheet 14 and the back sheet 15 passes through the imaging hole 4 and the optical film 13 on the reflective sheet 14.
  • the upper light transmitting portion and the liquid crystal panel 11 collect an image of the object to be detected on or above the liquid crystal panel 11.
  • the object to be detected is a finger print, and may be a palm print or a human face.
  • FIG. 21 is a schematic structural view of Embodiment 10 of the liquid crystal terminal device of the present invention, and most of the structures are the same as those of the embodiment shown in FIG. 13 except that the light guide plate of FIG. 13 is omitted in this embodiment. 1, the liquid crystal panel 11 is used as a light guide plate, and the light source 2 is provided on the left side of the liquid crystal panel 11.
  • the liquid crystal panel 11 is placed in a light transmitting state, and the light source 2 is turned on, so that at least part of the light emitted by the light source 2 is incident into the liquid crystal panel 11, and at least part of the light incident into the liquid crystal panel 11 is totally reflected and transmitted.
  • the photosensitive member 5 under the back plate 15 passes through the reflection sheet 14, the imaging hole 4 on the back plate 15, the light transmitting portion on the optical film 13, and the liquid crystal panel 11, and the detected object on or above the liquid crystal panel 11 is collected ( Fingerprint or palm print) image.
  • the distance from the side of the light guide plate to the midpoint of the imaging hole axis is the object distance h object
  • the object distance h object satisfies the formula: Where r is the center-to-center spacing of the adjacent two imaging apertures and ⁇ is the field of view of the imaging aperture.
  • the hole center distance r of two adjacent imaging holes satisfies the formula: r ⁇ 2 ⁇ h image tg( ⁇ /2), where h image is the image distance, which is the distance from the photosensitive member to the midpoint of the imaging hole axis, ⁇ Is the angle of view of the imaging aperture.

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Abstract

一种图像采集装置、终端设备、液晶终端设备及图像采集方法，图像采集装置（8）包括导光板（1）及与导光板（1）间隔设置的图像采集器（16），导光板（1）一侧设有光源（2）；该图像采集装置（8）集成在所述终端设备（7）；液晶终端设备包括液晶板（11）、背光模组（12）及图像采集装置（8），图像采集装置（8）的图像采集器（16）设置于背光模组（12）内；图像采集方法为：使光源（2）射入导光板（1）内至少部分光线发生全反射传输，通过图像采集器（16）采集导光板（1）另一侧的被检测物图像。基于光波导原理及多孔成像原理形成超薄的图像采集装置（8）、终端设备（7）及液晶终端设备，其可大大降低设备中图像采集模块的尺寸和厚度，给需要图像采集功能的移动设备和嵌入式设备的实现带来极大便利。

Description

图像采集装置、终端设备、液晶终端设备及图像采集方法
本发明要求于2014年6月20日提交中国专利局、申请号为201410281380.0、发明名称为“超薄型指纹、掌纹采集装置及指纹、掌纹图像采集方法”的中国专利申请的优先权，其全部内容通过引用结合在本发明中。
技术领域
本发明涉及图像采集技术领域，具体涉及一种超薄型的图像采集装置、终端设备、液晶终端设备及图像采集方法。
背景技术
现有的指纹采集装置大致有两种。一种是基于半导体芯片通过感应手指的指纹纹理采集指纹。另一种是光学指纹采集装置，利用光线在界面上因手指接触时脊线和谷线造成的光学差异形成指纹图像进行采集。但是半导体芯片指纹采集方法存在抗静电、抗腐蚀能力不足，且指纹采集灵敏度不是太高。如图1所示，现有的光学指纹、掌纹采集装置中，用于承载指纹、掌纹的光学部件大多包括三棱镜1'，三棱镜的一侧设置光源2'，另一侧设置感光器件3'和透镜4'，三棱镜1'的厚度较大，即使应用了其他的光学镜片承载指纹，也存在光学镜片较厚的问题。同时现有的采集装置大多应用了太多的光学元器件，导致采集装置的尺寸较大、厚度较厚。
上述图1中的光学指纹、掌纹采集装置，如果仅仅是应用于采集指纹，已经有很多不尽人意的地方了，但是如果再应用于采集掌纹，由于掌纹在尺寸上明显大过指纹，因此需要应用更大的三棱镜，以及更多的透镜和感光器件，三棱镜的形状结构决定了其承载指纹或掌纹的表面越大，其体积就越大，使得应用其的指纹、掌纹采集装置体积也越大，成本也就越高。
随着科技的发展及公众安全意识的增强，除了相对传统的安保领域，指纹、掌纹采集装置越来越广泛的应用在便于携带的电子产品上，例如手机、笔记本、平板笔记本等各种电子产品上。
随着现在电子产品超薄化的发展趋势，现有的光学指纹、掌纹采集装置的尺寸很难满足现有电子产品的对超薄尺寸的要求。半导体芯片超薄型指纹、掌纹采集装置一方面成本极高，另一方面其美观度较低，不能很好的满足现有电子产品超薄化的需求。 光学采集器同时也存在厚度太厚，难以满足超薄型电子产品超薄化的需求。
因此，如何减小光学指纹采集装置的厚度，成为本技术领域人员亟待解决的技术难题。
发明内容
针对上述问题，本发明提供一种图像采集装置、终端设备、液晶终端设备及图像采集方法，其图像采集装置结构紧凑、厚度薄，使终端设备、液晶终端设备中图像采集模块的尺寸和厚度大大降低，成本降低。
为了达到上述目的，本发明提供一种图像采集装置，其中包括：
导光板；
用于将光线射入导光板中的光源，所述光源设置于导光板的一侧；
用于采集导光板上被检测物图像的图像采集器，所述图像采集器与导光板间隔设置。
进一步地，所述图像采集器包括与所述导光板间隔设置的成像板，所述成像板上设有至少一个成像孔，所述成像板的另一面对应成像孔间隔设置有至少一个感光组件。
进一步地，所述导光板远离成像板的一面至成像孔轴心线中点的距离为物距hobject，该物距hobject满足公式：
Figure PCTCN2014095140-appb-000001
其中r为相邻两个成像孔的孔中心间距，α是成像孔的视场角。
进一步地，相邻两个成像孔的孔中心间距r满足公式：r≥2·himagetg(α/2)，其中himage为像距，是感光组件至成像孔轴心线中点的距离，α是成像孔的视场角。
进一步地，所述成像孔的孔径为0.001mm-1mm，所述成像板的厚度为0.005mm至5mm，所述导光板的厚度为0.1mm至5mm。
进一步地，所述成像孔与所述感光组件之间设有滤光片。
进一步地，所述成像孔的任意一侧或两侧设置有矫正透镜。
进一步地，所述图像采集装置包括与导光板间隔设置的至少一个透镜，所述透镜另一面间隔设置有至少一个感光组件。
一种终端设备，其中包括所述的图像采集装置。
一种终端设备，其中包括导光板及与导光板间隔设置的显示面板，所述导光板的一侧设置有将至少部分光线射入导光板的光源，以所述显示面板作为成像板，所述显示面板上设有至少一个成像孔，所述显示面板的另一面对应成像孔间隔设置有至少一个感光组件。
进一步地，所述导光板远离所述显示面板的一面至成像孔轴心线中点的距离为物距hobject，该物距hobject满足公式：
Figure PCTCN2014095140-appb-000002
其中r为相邻两个成像孔的孔中心间距，α是成像孔的视场角。
进一步地，相邻两个成像孔的孔中心间距r满足公式：r≥2·himagetg(α/2)，其中himage为像距，是感光组件至成像孔轴心线中点的距离，α是成像孔的视场角。
一种终端设备，其中包括导光板及与导光板间隔设置的显示面板，所述导光板的一侧设置有将至少部分光线射入导光板的光源，所述显示面板上设置有至少一个通光孔，所述显示面板的另一面对应通光孔间隔设置有至少一个透镜，所述透镜另一侧间隔设置有至少一个感光组件。
一种液晶终端设备，包括液晶显示组件，其中所述液晶显示组件包括液晶板、背光模组及所述的图像采集装置，其中，
所述液晶板设置于所述图像采集装置的导光板与图像采集器之间；
所述背光模组包括反射片、背板及设置于反射片与液晶板之间的至少一层光学薄片，所述反射片与背板之间设置有图像采集器，所述反射片上对应图像采集器的位置设置有通孔，所述光学膜片上对应所述通孔的位置设置有透光部。
一种液晶终端设备，包括液晶显示组件，其中所述液晶显示组件包括液晶板、背光模组及所述的图像采集装置，其中，
所述液晶板设置于所述图像采集装置的导光板与图像采集器之间，所述背光模组设置于液晶板与图像采集器之间；
所述背光模组包括反射片、背板及设置于反射片与液晶板之间的至少一层光学膜片，所述反射片与背板上对应图像采集器的位置分别设置有第一通孔和第二通孔，所述光学膜片上对应所述第一通孔和第二通孔的位置设置有透光部。
一种液晶终端设备，包括液晶显示组件，其中所述液晶显示组件包括液晶板、设置于液晶板一面的背光模组及间隔设置于液晶板另一面的导光板，所述导光板的一侧 设置有光源，所述背光模组包括反射片、背板及设置于反射片与液晶板之间的至少一层光学膜片，所述反射片与背板之间设置有感光组件，以所述反射片作为成像板，所述成像板上与感光组件对应的位置设置有至少一个成像孔，所述成像孔与感光组件间隔设置，所述光学膜片上对应所述成像孔的位置设置有透光部。
一种液晶终端设备，包括液晶显示组件，其中所述液晶显示组件包括液晶板、设置于液晶板一面的背光模组及间隔设置于液晶板另一面的导光板，所述导光板的一侧设置有光源，所述背光模组包括反射片、背板及设置于反射片与液晶板之间的至少一层光学膜片，所述背板另一侧设置有至少一个感光组件，以所述反射片、背板整体作为成像板，所述成像板上与感光组件对应的位置设置有至少一个成像孔，所述感光组件与成像孔间隔设置，所述光学膜片上对应所述成像孔的位置设置有透光部。
一种液晶终端设备，包括液晶显示组件，其中所述液晶显示组件包括液晶板和背光模组，以所述液晶板作为导光板，所述导光板的一侧设置有光源，所述背光模组包括反射片、背板及设置于反射片与液晶板之间的至少一层光学膜片，所述反射片与背板之间设置有至少一个感光组件，以所述反射片作为成像板，所述成像板上与感光组件对应的位置设置有至少一个成像孔，所述成像孔与感光组件间隔设置，所述光学膜片上对应所述成像孔的位置设置有透光部。
一种液晶终端设备，包括液晶显示组件，其中所述液晶显示组件包括液晶板和背光模组，以所述液晶板作为导光板，所述导光板的一侧设置有光源，所述背光模组包括反射片、背板及设置于反射片与液晶板之间的至少一层光学膜片，所述背板另一侧设置有至少一个感光组件，以所述反射片、背板整体作为成像板，所述成像板上与感光组件对应的位置设置有至少一个成像孔，所述感光组件与成像孔间隔设置，所述光学膜片上对应所述成像孔的位置设置有透光部。
进一步地，所述导光板远离所述成像板的一面至成像孔轴心线中点的距离为物距hobject，该物距hobject满足公式：
Figure PCTCN2014095140-appb-000003
其中r为相邻两个成像孔的孔中心间距，α是成像孔的视场角。
进一步地，相邻两个成像孔的孔中心间距r满足公式：r≥2·himagetg(α/2)，其中himage为像距，是感光组件至成像孔轴心线中点的距离，α是成像孔的视场角。
一种所述的图像采集装置的图像采集方法，其包括以下步骤：
将光源发射的至少部分光线射入导光板内，使射入导光板内的至少部分光线发生全反射传输；
通过图像采集器采集导光板另一侧的被检测物图像。
进一步地，所述通过图像采集器采集导光板另一侧的被检测物图像具体包括：
在被检测物触摸的导光板表面建立多个扫描区域，使相邻的扫描区域之间相互重叠；
通过所述图像采集器对各扫描区域的部分被检测物取像，使各相邻成像区域图像不能混叠；
将扫描获得的各成像区域图像进行拼接，获得完整的被检测物图像。
一种所述的液晶终端设备的图像采集方法，其包括以下步骤：
响应一控制信号使液晶板处于透光状态；
将光源发射的至少部分光线射入导光板内，使射入导光板内的至少部分光线发生全反射传输；
在液晶板一侧通过所述图像采集器对远离液晶板的导光板另一侧的被检测物进行图像采集。
进一步地，所述在液晶板一侧通过所述图像采集器对远离液晶板的导光板另一侧的被检测物进行图像采集具体为：
在被检测物触摸的导光板表面建立针对同一被检测物的多个扫描区域，使相邻的扫描区域之间相互重叠；
逐一对各个扫描区域的部分被检测物取像，使各相邻成像区域图像不能重叠；
将扫描获得的各成像区域图像进行拼接，获得完整的被检测物图像。
进一步地，所述在液晶板一侧通过所述图像采集器对远离液晶板的导光板另一侧的被检测物进行图像采集具体为：
在被检测物触摸的导光板表面建立针对同一被检测物的多个扫描区域，使相邻的扫描区域之间相互重叠；
响应一控制信号使对应各个扫描区域的液晶板逐一处于透光状态；
逐一对各个扫描区域的部分被检测物取像，使各相邻成像区域图像不能重叠；
将扫描获得的各成像区域图像进行拼接，获得完整的被检测物图像。
采用上述方案后，本发明图像采集装置、终端设备、液晶终端设备及图像采集方法具有以下优点：
1、通过利用破坏所述导光板中光的全反射传播，并将光源设置在导光板的一侧， 首先在厚度上降低了成像光源的厚度，其次采用超薄的导光板将被检测物进行反射，降低了产生被检测物图像的光学镜面的厚度，最后采用结构精巧的成像板和感光组件形成采集器或透镜与感光组件组成采集器，进一步降低了被检测物采集部分的厚度，几部分组合起来形成了一个厚度较传统的光学采集器厚度极大降低的超薄型的图像采集装置、终端设备、液晶终端设备；
2、将本发明图像采集装置集成在终端设备或液晶液端设备上，使终端设备、液晶终端设备增加了指纹采集功能和/或掌纹采集功能，该终端设备、液晶终端设备额外增加的部件少且成本低。
附图说明
图1是现有技术中的指纹、掌纹采集装置的结构示意图；
图2是本发明图像采集装置的实施例一结构示意图；
图3是本发明图像采集装置的实施例二结构示意图；
图4A是本发明图像采集装置的实施例三结构示意图；
图4B是图4A的图像扫描区域俯视示意图；
图5是本发明图像采集装置的实施例四结构示意图；
图6是本发明终端设备的实施例一结构示意图；
图7是本发明终端设备的实施例二结构示意图；
图8是本发明终端设备的实施例三结构示意图；
图9是本发明终端设备的实施例四结构示意图；
图10是本发明液晶终端设备的实施例一结构示意图；
图11是本发明液晶终端设备的实施例二结构示意图；
图12是本发明液晶终端设备的实施例三结构示意图；
图13是本发明液晶终端设备的实施例四结构示意图；
图14是本发明液晶终端设备的实施例五结构示意图；
图15是本发明液晶终端设备的实施例六结构示意图；
图16是本发明液晶终端设备的实施例七结构示意图；
图17是采用图16所述液晶终端设备采集到的多个指纹图像示意图；
图18是图17所示各指纹图像拼接后的完整指纹图像；
图19是本发明液晶终端设备的实施例八结构示意图；
图20是本发明液晶终端设备的实施例九结构示意图；
图21是本发明液晶终端设备的实施例十结构示意图。
具体实施方式
下面结合说明书附图对本发明做进一步的描述。
如图2所示本发明图像采集装置的实施例一结构示意图，包括导光板1及与导光板1间隔设置的图像采集器，导光板1的选材很广泛，例如玻璃板及各种透明材料。该实施例图像采集器设置于导光板1的下方，导光板1的一侧设置有光源2，此实施例光源2可通过支架固定于导光板1的左侧。在本实施例中图像采集器包括与导光板1间隔设置的成像板3，成像板3设置于导光板1的下方。该实施例中成像板3上设有一个成像孔4，也可以设置为多个。成像板3的另一面(即其下面)对应成像孔4的位置间隔设置有感光组件5，感光组件5包括光电转换传感器及图像处理器。光源2发射的光线由导光板1的左侧面射入导光板1内，其中有至少部分光线在导光板1内进行全反射传输。具体光线是全部在导光板1内进行全发射传输还是部分进行全反射传输，本实施例以及下述的各实施例不对其进行限定，只要光线有全反射传输，能够实现被检测物图像的采集即可。
使用时，导光板1提供被检测物(手指)按压，在手指未按压时，光源2发射的光线射入导光板1内，其中有至少部分光线在导光板1内以全反射形式传输，当手指按压在导光板1上表面时，由于手指表面的折射率和空气不同，手指表面有汗液，其折射率与水近似，破坏了光线在导光板1内的全反射条件，从而使一部分光线穿过导光板1表面投射到指纹上，指纹表面对光进行散射，产生各个角度的散射光，一部分散射光经过成像孔4形成一个指纹图像，被在成像板3下方的感光组件5采集。
本实施例的图像采集装置的指纹采集方法，包括以下步骤：
将光源2发射的至少部分光线射入导光板1内，其中有至少部分光线在导光板1内进行全反射传输；
通过图像采集器的感光组件5采集导光板1上表面的指纹图像。
如图3所示本发明图像采集装置的实施例二结构示意图，其大部分结构与图2所述实施例相同，不同之处在于，图像采集装置包括与导光板1间隔设置的透镜6，透镜6在本实施例中设置于导光板1的下方，透镜6的另一面(即其下面)间隔设置有所述的感光组件5。使用时，光源2发射的光线射入导光板1内，其中有至少部分光线在导光板1内进行全反射传输，当被检测物(手指)按压在导光板1的上表面，使导光板1内的光线全反射传输被破坏，使部分光线穿过导光板1表面投射到指纹上， 指纹表面对光进行散射，产生各个角度的散射光，一部分散射光射在透镜6上经折射形成一个指纹图像，被在透镜6下方的感光组件5采集。
上述图2和图3所述实施例也可以应用于采集手掌的掌纹图像，或者同时采集手指和手掌(整个手部)的图像。
如图4A所示本发明图像采集装置的实施例三结构示意图，其大部分结构与图2所述实施例相同，不同之处在于，图像采集装置的成像板3上设置有多个成像孔4，成像板3的下方对应各成像孔4的位置分别设置有感光组件5，在成像板3上设置多个成像孔4是因为当导光板1、成像板3、感光组件5三者之间的间距小时，即整体厚度较小时，单个成像孔4的视场范围很小，只能对一小部分指纹进行清晰显现，为增大指纹的成像面积，因此设置多个成像孔4。此实施例中，成像孔4、感光组件5均设置为4个。
导光板1远离成像板3的一面(即上表面)至成像孔4轴心线A-A中点O的距离为物距hobject，该实施例中，该物距hobject满足公式：
Figure PCTCN2014095140-appb-000004
其中r为相邻两个成像孔4的孔中心间距，α是成像孔4的视场角，这样设置保证了扫描区域的指纹图像完整不出现遗漏，其中扫描区域定义为：被检测物(手指指纹)上，每个成像孔4的视场角对应的可视范围。同时相邻两个成像孔4的孔中心间距r满足公式：r≥2·himagetg(α/2)，其中himage为像距，是感光组件5至成像孔4轴心线中点的距离，α是成像孔的视场角，这样设置进一步保证各成像孔4对应的成像区域图像之间不互相混叠，提高图像质量，其中成像区域定义为：在感光组件5上，每个成像孔4的视场角α对应的感光范围，即每个成像孔4的像斑大小。
该实施例中假设himage＝3毫米，α＝120°，则即r≥10.392毫米。则物距hobject≥4.242毫米，其使各成像孔4单独成像，互不干扰。
上述公式
Figure PCTCN2014095140-appb-000006
和r≥2·himagetg(α/2)是由以下计算过程得来：
(1)首先给定成像板3的厚度为hhole，成像孔4的直径为dhole；
(2)参考图4A，由上述hhole和dhole，可计算出成像角α，tg(α/2)＝(d孔/2)/(h孔/2)，则
α＝2arctg(d孔/h孔)        (公式一)
(3)给定像距himage，可计算确定出成像区域直径dimage，参考图4A所示：
dimage＝2·himage·tg(α/2)         (公式二)
(4)根据成像区域必须不能互相混叠，可得出相邻成像孔的孔中心间距r：
r≥dimage即
r≥2·himage·tg(α/2)              (公式三)
(5)结合图4A和图4B，为了保证被检测物图像完整不出现遗漏，每个成像孔对应的图像扫描区域(即在导光板1上，每个成像孔4的视场角对应的可视范围，图中dobject为其直径)必须重叠：
即
Figure PCTCN2014095140-appb-000007
又因为dobject＝2hobject·tg(α/2)
因此
Figure PCTCN2014095140-appb-000008
即简化为
Figure PCTCN2014095140-appb-000009
        (公式四)
本实施例图像采集装置的图像采集方法包括如下步骤：
将光源2发射的至少部分光线射入导光板1内，使射入导光板1内的至少部分光线进行全反射传播；
根据成像孔4的数量为四个，在同一手指触摸的导光板1的上表面建立四个扫描区域，使相邻的扫描区域之间相互重叠；
通过图像采集器的感光组件5透过成像板3的成像孔4对各扫描区域的部分指纹 取像，使各相邻成像区域部分指纹图像不能混叠；
将扫描获得的各成像区域的部分指纹图像进行拼接，再经图像增强处理后，可获得完整的指纹图像。
该导光板1用以提供给手指或手掌等被检测物一个触碰平面，便于对指纹、掌纹图像采集，另外可以保护其下面的部件。
本实施例具备图2所述实施例所述图像采集装置全部优点，本实施例相较于图2所述实施例能够进一步缩小导光板1、成像板3及感光组件5三者之间的间距，且不会影响对指纹的采集面积，仅是在对指纹进行合成过程中增加了拼接和裁剪的过程。
上述各实施例中，所述成像孔4的孔径为0.001-1mm；考虑到最佳的成像效果和较短的成像距离以及加工等因素，所述的成像孔4的孔径宜选择在0.01-0.1mm之间，如0.05mm较佳。成像板3的厚度为0.005mm至5mm，优选厚度为0.001mm至5mm，导光板1的厚度为0.1mm至5mm。在成像孔4与感光组件5之间可以设滤光片，用于调节光照的均匀性。在成像孔4的任意一侧或两侧可以增设矫正透镜，对光线进行调节，从而在成像孔尺寸较大时依然获得清晰的成像。
如图5所示本发明图像采集装置的实施例四结构示意图，该实施例用于对掌纹图像的采集，其大部分结构与图4A所示实施例结构相同，不同之处在于，图像采集装置包括与导光板1间隔设置的多个透镜6，所述透镜6的另一面(下面)间隔设置有多个感光组件5，此实施例中透镜6和感光组件5均为4个。
本实施例图像采集装置的图像采集方法具体包括如下步骤：
将光源2发射的至少部分光线射入导光板1内，使射入导光板1内的至少部分光线进行全反射传输；
根据透镜6的数量为四个，在同一手掌触摸的导光板1的上表面建立四个扫描区域，使相邻的扫描区域之间相互重叠；
将扫描获得的各成像区域的部分掌纹图像进行拼接，再经图像增强处理后，可获得完整的掌纹图像。
该实施例中，采用多个透镜6和多个感光组件5是为避免单个透镜的视场不够。
另外，本实施例的结构也可以应用于采集指纹图像，采集指纹图像时，可以利用几个小一点的透镜，然后将采集到的指纹图像进行拼接即可。
上述所述各图像采集装置可应用于各种终端设备中。在应用中，所述图像采集装置可作为独立模块对指纹进行采集。如图6所示本发明终端设备的实施例结构示意图，该终端设备7上设置有如上述图1-图5中任一所述图像采集装置8，该图像采集 装置8设置于终端设备7的边缘位置上，该终端设备如手机，可以在其HOME键上设置。这种图像采集装置较通常的摄像组件具有结构简单、厚度薄等特点。
如图7所示本发明终端设备的实施例二结构示意图，其包括上述图1-图5中任一所述图像采集装置8，该图像采集装置8为独立器件，其与终端设备7通过导线和接口互相连接。
如图8所示本发明终端设备的实施例三结构示意图，包括导光板1及与导光板1间隔设置的显示面板9，导光板1的左侧设置有光源2，该显示面板9为液晶屏，在该实施例中显示面板9设置于导光板1的下方，以所述显示面板9作为成像板，该显示面板9上设有至少一个成像孔4，此实施例为四个成像孔4，在显示面板9的另一面(即下面)对应成像孔4的位置间隔设置有四个感光组件5，此实施例中各成像孔4对应一个感光组件5，带有多个成像孔4的显示面板9与多个感光组件5组成图像采集器。
本实施例导光板1远离显示面板9的一面(即上表面)至成像孔4轴心线中点的距离为物距hobject，该实施例中，该物距hobject满足公式：
Figure PCTCN2014095140-appb-000010
其中r为相邻两个成像孔4的孔中心间距，α是成像孔4的视场角，同时相邻两个成像孔4的孔中心间距r满足公式：r≥2·himagetg(α/2)，其中himage为像距，是感光组件5至成像孔4轴心线中点的距离，α是成像孔的视场角。
该实施例中假设himage＝2毫米，α＝120°，则
Figure PCTCN2014095140-appb-000011
即r≥6.928毫米。则物距hobject≥2.828毫米，其使各成像孔4单独成像，互不干扰。
该实施例可以参考图4A所述实施例，显示面板9作为成像板，其上设置多个成像孔4，当手指未按压在导光板1上时，光源2射入导光板1内的至少部分光线进行全反射传输，当手指按压在导光板1上时，破坏了导光板1内光线的全反射传播，使部分光线穿过导光板1表面投射到指纹上，指纹表面对光进行散射，产生各个角度的散射光，一部分散射光经过多个成像孔4后形成多个部分指纹图像并最终拼接成一个完整指纹图像，被在显示面板9下方的感光组件5采集。
上述实施例中，在成像孔4与感光组件5之间可以设置滤光片，用于调节光照的均匀性。还可以在所述成像孔4的任意一侧或两侧增设矫正透镜，对光线进行调节， 从而在成像孔4尺寸较大时依然获得清晰的成像。
如图9所示本发明终端设备的实施例四结构示意图，包括导光板1及间隔设置于导光板1下方的显示面板9，该显示面板9为液晶屏，导光板1的左侧设置有将至少部分光线射入导光板1的光源2，且射入导光板1内的至少部分光线发生全反射传输，显示面板9上设置有至少一个通光孔10，此实施例通光孔10设置有四个，显示面板9的另一面(下面)对应通光孔10间隔设置有至少一个透镜6，此实施例中各通光孔10的下方对应设置一个透镜6，各透镜6的下方对应设置有感光组件5。四个透镜6和四个感光组件5构成图像采集器。
使用时，当手指按压在导光板1上表面，破坏了导光板1内光线的全反射传输，一部分光穿过导光板1表面投射到指纹上，指纹表面对光进行散射，产生各个角度的散射光，一部分散射光穿过多个通光孔10射在多个透镜6上经折射，形成多个部分指纹图像并最终拼接成一个完整指纹图像，被在透镜6下方的感光组件5采集。
上述两个实施例仅仅给出了对指纹的采集，其也能同时采集多个手指的指纹或者多个掌纹，对掌纹的采集也是同样的原理，不同之处仅仅在于导光板1上表面尺寸大小有所不同。
如图10所示本发明液晶终端设备的实施例一结构示意图，其包括液晶显示组件，该液晶显示组件包括液晶板11、设置于液晶板11下方的背光组件12及图1-图5中任一实施例所述的图像采集装置，本实施例的液晶板11选择由上、下两块玻璃面板及夹在两块玻璃面板之间的液晶分子构成的透明面板体，背光模组12由上向下依次包括一层或一层以上的光学膜片13、反射片14及背板15。液晶板11设置于图像采集装置的导光板1与图像采集器16之间，该图像采集器16可以为带有至少一个成像孔的成像板和至少一个感光组件组成的图像采集器，或者为由至少一个透镜与至少一个感光组件组成的图像采集器。该实施例中反射片14与背板15互相紧贴。在反射片14的中心设置有一通孔17，在背板15的上表面对应通孔17的位置设置有一凹陷部18，图像采集器16固定在该凹陷部18内，在各光学膜片13上对应图像采集器16的位置均设有透光部。
该实施例的液晶终端设备的图像采集方法包括如下步骤：
响应一控制信号使液晶板11处于透光状态；
将导光板1左侧端的光源2发射的至少部分光线射入导光板1内，使射入导光板1内的至少部分光线进行全反射传输；
在液晶板11下方通过图像采集器16透过反射片14上的通孔17、光学膜片13 的透光部、液晶板11及导光板1，对导光板1上表面的指纹进行图像采集。
此实施例被检测物为手指指纹，也可以为掌纹或人脸。在光学膜片13上设置透光部是为了防止光学膜片13不易透光或不透光时对图像采集造成影响。当任一光学膜片13是全透光时，则该光学膜片13便是透光部。当任一光学膜片13不易透光或不透光时，该光学膜片13上的透光部可为一个透光孔或透光片。
上述各实施例中，所述成像孔4的孔径为0.001-1mm；考虑到最佳的成像效果和较短的成像距离以及加工等因素，所述的成像孔4的孔径宜选择在0.01-0.1mm之间，如0.05mm较佳。成像板3的厚度为0.005mm至5mm，优选厚度为0.001mm至5mm，导光板1的厚度为0.1mm至5mm。在成像孔4与感光组件5之间可以设滤光片，用于调节光照的均匀性。在成像孔4的任意一侧或两侧可以增设矫正透镜，对光线进行调节，从而在成像孔尺寸较大时依然获得清晰的成像。
如图11所示本发明液晶终端设备的实施例二结构示意图，该实施例的大部分结构与图10所述实施例相同，不同之处在于，图像采集器16设置于背光模组12的下方，背光模组12的反射片14与背板15上对应图像采集器16的位置分别设置有第一通孔19和第二通孔20，光学膜片13上对应第一通孔19和第二通孔20的位置设置有透光部。
使用时，使液晶板11处于透光状态时，将光源2的至少部分光线射入导光板1内，使导光板1内的至少部分光线发生全反射传输，将手指按压在导光板1的上表面，图像采集器16透过第二通孔20、第二通孔19、光学膜片13上的透光部、液晶板11及导光板1采集到导光板1上表面的指纹图像，当然该实施例也可以检测掌纹图像。
如图12所示本发明液晶终端设备的实施例三结构示意图，其大部分结构与图10所述实施例相同，不同之处在于，背板15上表面的凹陷部18内固定有感光组件5，以所述反射片14作为成像板，所述反射片14上与感光组件5对应的位置设置有至少一个成像孔4，所述成像孔4与感光组件5间隔设置，光学膜片13上对应所述成像孔4的位置设置有透光部。
采集指纹或掌纹时，响应一控制信号使液晶板11处于透光状态；
将光源2的至少部分光线射入导光板1内，使入射到导光板1内的至少部分光线进行全反射传输；
图像采集器的感光组件5透过成像孔4、光学膜片13上的透光部、液晶板11及导光板1后采集到导光板1上表面的指纹图像。
如图13所示本发明液晶终端设备的实施例四结构示意图，其大部分结构与图11 所述实施例相同，不同之处在于，在背板15另一侧(即背板下面)对应液晶板11的位置设置有感光组件5，以反射片14、背板15整体作为成像板，该成像板上与感光组件5对应的位置设置有成像孔4，感光组件5与成像孔4呈间隔设置。在液晶板11透光状态下，使光源2发射的至少部分光线射入导光板1内，且使射入导光板1内的至少部分光线进行全反射传输，图像采集器的感光组件5透过成像孔4、光学膜片13上的透光部、液晶板11及导光板1后采集到导光板1上表面的指纹图像。
如图14所示本发明液晶终端设备的实施例五结构示意图，其大部分结构与图12所述实施例结构相同，不同之处在于，该液晶显示组件还包括触摸屏21，该触摸屏21位于导光板1与液晶板11之间。
如图15所示本发明液晶终端设备的实施例六结构示意图，其大部分结构与图13所述实施例结构相同，不同之处在于，该液晶显示设备还包括触摸屏21，该触摸屏21位于导光板1与液晶板11之间。
上述图12-图15所述液晶终端设备的实施例中，所述成像孔4的孔径为0.001-1mm；考虑到最佳的成像效果和较短的成像距离以及加工等因素，所述的成像孔4的孔径宜选择在0.01-0.1mm之间，如0.05mm较佳。成像板3的厚度为0.005mm至5mm，优选厚度为0.001mm至5mm，导光板1的厚度为0.1mm至5mm。在成像孔4与感光组件5之间可以设滤光片，用于调节光照的均匀性。在成像孔4的任意一侧或两侧可以增设矫正透镜，对光线进行调节，从而在成像孔尺寸较大时依然获得清晰的成像。
如图16所示本发明液晶终端设备的实施例七结构示意图，其大部分结构与图15所述实施例结构相同，不同之处在于，以所述反射片14和背板15整体作为成像板，该成像板上加工有多个成像孔4，此实施例成像孔4设置为四个，感光组件5设置有四个，各感光组件5分别与一个成像孔4上下对应。
本实施例液晶终端设备的图像采集方法为：
响应一控制信号使液晶板11处于透光状态；
将导光板1左侧的光源2发射的至少部分光线射入导光板1内，并使射入导光板1内的至少部分光线进行全反射传输；
在导光板1的上表面建立针对同一捺印指纹的多个扫描区域，此实施例为四个扫描区域，使相邻的扫描区域之间相互重叠；
通过控制图像采集器的四个感光组件5逐一对各个扫描区域的部分指纹取像，即依次控制一个感光组件5开启，其它三个感光组件5关闭来分别采集四个扫描区域的 部分指纹图像，使各相邻成像区域部分指纹图像相互不重叠，各感光组件5分别透过其对应的成像孔4、光学膜片13上的透光部、液晶板11、触摸屏21及导光板1采集其所对应的扫描区域内的部分指纹图像，可参考图17所示，该图中显示的是采集到20个部分指纹图像；
将扫描获得的各成像区域图像进行拼接，获得完整的指纹图像：先将采集到的四张部分指纹图像中重复区域裁剪，之后再拼接即得到完整的指纹图像，此处可参考由图17中20个部分指纹图像拼接成图18中完整的指纹图像。
上述响应一控制信号，可以是触摸屏21所得到的控制信号或触动按键所得到的控制信号或响应远程信号所得到的控制信号等，在此不一一列举。
上述液晶终端设备的实施例中，均以手指指纹作为被检测物，被检测物也可以为其他立体或平面目标物体。
如图19所示本发明液晶终端设备的实施例八结构示意图，其大部分结构与图16所示实施例结构相同，不同之处在于，感光组件5设置为一个。
该液晶终端设备的图像采集方法包括以下步骤：
响应一控制信号使液晶板11处于透光状态；
将光源2发射的至少部分光线射入导光板1内，并使射入导光板1内的至少部分光线进行全反射传输；
在导光板1的上表面建立针对同一捺印指纹的多个扫描区域，此实施例为四个扫描区域，使相邻的扫描区域之间相互重叠；
将液晶板11分成四个液晶区域，分别对应各所述扫描区域，响应一控制信号，通过控制四个液晶区域的启闭，使各液晶区域逐一处于透光状态，从而使感光组件5能够透过成像孔4及对应的液晶区域采集到所对应的扫描区域的部分指纹图像，例如，每次控制一个液晶区域开启，其它三个液晶区域关闭，这样可以依次采集到各液晶区域的部分指纹图像，此处要使各成像区域部分指纹图像相互不重叠；
最后将四张成像区域部分指纹图像进行拼接，拼接后得到完整的指纹图像。
如图20所示本发明液晶终端设备的实施例九结构示意图，其大部分结构与图12所述实施例的结构相同，不同之处在于，该实施例中省去了图12中的导光板1，而将液晶板11作为导光板，在该液晶板11的左侧设置光源2。
使用时，使液晶板11处于透光状态，同时将光源2开启，使光源2发射的至少部分光线射入液晶板11中，且射入液晶板11内的至少部分光线进行全反射传输，位于反射片14和背板15之间的感光组件5透过反射片14上的成像孔4、光学膜片13 上的透光部及液晶板11，采集到液晶板11上面或上方的被检测物图像，此实施例被检测物为手指指纹，也可以为掌纹或人脸。
如图21所示本发明液晶终端设备的实施例十结构示意图，其大部分结构与图13所述实施例的结构相同，不同之处在于，该实施例中省去了图13中的导光板1，而将液晶板11作为导光板，在该液晶板11的左侧设置有光源2。
使用时，使液晶板11处于透光状态，同时将光源2开启，使光源2发射的至少部分光线射入液晶板11中，且射入液晶板11内的至少部分光线进行全反射传输，位于背板15下方的感光组件5透过反射片14、背板15上的成像孔4、光学膜片13上的透光部及液晶板11，采集到液晶板11上面或上方的被检测物(指纹或掌纹)图像。
上述图12至图21所述的各实施例中，所述导光板远离所述成像板的一面至成像孔轴心线中点的距离为物距hobject，该物距hobject满足公式：
Figure PCTCN2014095140-appb-000012
其中r为相邻两个成像孔的孔中心间距，α是成像孔的视场角。且相邻两个成像孔的孔中心间距r满足公式：r≥2·himagetg(α/2)，其中himage为像距，是感光组件至成像孔轴心线中点的距离，α是成像孔的视场角。
以上，仅为本发明的较佳实施例，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应该以权利要求所界定的保护范围为准。

Claims (26)

  1. 一种图像采集装置，其特征在于，包括：
    导光板；
    用于将光线射入导光板中的光源，所述光源设置于导光板的一侧；
    用于采集导光板上被检测物图像的图像采集器，所述图像采集器与导光板间隔设置。
  2. 根据权利要求1所述的图像采集装置，其特征在于，所述图像采集器包括与所述导光板间隔设置的成像板，所述成像板上设有至少一个成像孔，所述成像板的另一面对应成像孔间隔设置有至少一个感光组件。
  3. 根据权利要求2所述的图像采集装置，其特征在于，所述导光板远离成像板的一面至成像孔轴心线中点的距离为物距hobject，该物距hobject满足公式：
    Figure PCTCN2014095140-appb-100001
    其中r为相邻两个成像孔的孔中心间距，α是成像孔的视场角。
  4. 根据权利要求2或3所述的图像采集装置，其特征在于，相邻两个成像孔的孔中心间距r满足公式：r≥2·himagetg(α/2)，其中himage为像距，是感光组件至成像孔轴心线中点的距离，α是成像孔的视场角。
  5. 根据权利要求2所述的指纹、掌纹采集装置，其特征在于，所述成像孔的孔径为0.001mm-1mm，所述成像板的厚度为0.005mm至5mm，所述导光板的厚度为0.1mm至5mm。
  6. 根据权利要求2、3、5所述的图像采集装置，其特征在于，所述成像孔与所述感光组件之间设有滤光片。
  7. 根据权利要求2、3、5所述的图像采集装置，其特征在于，所述成像孔的任意一侧或两侧设置有矫正透镜。
  8. 根据权利要求1所述的图像采集装置，其特征在于，所述图像采集装置包括与导光板间隔设置的至少一个透镜，所述透镜另一面间隔设置有至少一个感光组件。
  9. 一种终端设备，其特征在于，包括权利要求1-8之一所述的图像采集装置。
  10. 一种终端设备，其特征在于，包括导光板及与导光板间隔设置的显示面板，所述导光板的一侧设置有将至少部分光线射入导光板的光源，以所述显示面板作为成像板，所述显示面板上设有至少一个成像孔，所述显示面板的另一面对应成像孔间隔设置有至少一个感光组件。
  11. 根据权利要求10所述的终端设备，其特征在于，所述导光板远离所述显示面板的一面至成像孔轴心线中点的距离为物距hobject，该物距hobject满足公式：
    Figure PCTCN2014095140-appb-100002
    其中r为相邻两个成像孔的孔中心间距，α是成像孔的视场角。
  12. 根据权利要求10或11所述的终端设备，其特征在于，相邻两个成像孔的孔中心间距r满足公式：r≥2·himagetg(α/2)，其中himage为像距，是感光组件至成像孔轴心线中点的距离，α是成像孔的视场角。
  13. 一种终端设备，其特征在于，包括导光板及与导光板间隔设置的显示面板，所述导光板的一侧设置有将至少部分光线射入导光板的光源，所述显示面板上设置有至少一个通光孔，所述显示面板的另一面对应通光孔间隔设置有至少一个透镜，所述透镜另一侧间隔设置有至少一个感光组件。
  14. 一种液晶终端设备，包括液晶显示组件，其特征在于，所述液晶显示组件包括液晶板、背光模组及权利要求1-8之一所述的图像采集装置，其中，
    所述液晶板设置于所述图像采集装置的导光板与图像采集器之间；
    所述背光模组包括反射片、背板及设置于反射片与液晶板之间的至少一层光学薄片，所述反射片与背板之间设置有图像采集器，所述反射片上对应图像采集器的位置设置有通孔，所述光学膜片上对应所述通孔的位置设置有透光部。
  15. 一种液晶终端设备，包括液晶显示组件，其特征在于，所述液晶显示组件包括液晶板、背光模组及权利要求1-8之一所述的图像采集装置，其中，
    所述液晶板设置于所述图像采集装置的导光板与图像采集器之间，所述背光模组设置于液晶板与图像采集器之间；
    所述背光模组包括反射片、背板及设置于反射片与液晶板之间的至少一层光学膜片，所述反射片与背板上对应图像采集器的位置分别设置有第一通孔和第二通孔，所述光学膜片上对应所述第一通孔和第二通孔的位置设置有透光部。
  16. 一种液晶终端设备，包括液晶显示组件，其特征在于，所述液晶显示组件包括液晶板、设置于液晶板一面的背光模组及间隔设置于液晶板另一面的导光板，所述导光板的一侧设置有光源，所述背光模组包括反射片、背板及设置于反射片与液晶板之间的至少一层光学膜片，所述反射片与背板之间设置有感光组件，以所述反射片作为成像板，所述成像板上与感光组件对应的位置设置有至少一个成像孔，所述成像孔与感光组件间隔设置，所述光学膜片上对应所述成像孔的位置设置有透光部。
  17. 一种液晶终端设备，包括液晶显示组件，其特征在于，所述液晶显示组件包括液晶板、设置于液晶板一面的背光模组及间隔设置于液晶板另一面的导光板，所述导光板的一侧设置有光源，所述背光模组包括反射片、背板及设置于反射片与液晶板之间的至少一层光学膜片，所述背板另一侧设置有至少一个感光组件，以所述反射片、背板整体作为成像板，所述成像板上与感光组件对应的位置设置有至少一个成像孔，所述感光组件与成像孔间隔设置，所述光学膜片上对应所述成像孔的位置设置有透光部。
  18. 一种液晶终端设备，包括液晶显示组件，其特征在于，所述液晶显示组件包括液晶板和背光模组，以所述液晶板作为导光板，所述导光板的一侧设置有光源，所述背光模组包括反射片、背板及设置于反射片与液晶板之间的至少一层光学膜片，所述反射片与背板之间设置有至少一个感光组件，以所述反射片作为 成像板，所述成像板上与感光组件对应的位置设置有至少一个成像孔，所述成像孔与感光组件间隔设置，所述光学膜片上对应所述成像孔的位置设置有透光部。
  19. 一种液晶终端设备，包括液晶显示组件，其特征在于，所述液晶显示组件包括液晶板和背光模组，以所述液晶板作为导光板，所述导光板的一侧设置有光源，所述背光模组包括反射片、背板及设置于反射片与液晶板之间的至少一层光学膜片，所述背板另一侧设置有至少一个感光组件，以所述反射片、背板整体作为成像板，所述成像板上与感光组件对应的位置设置有至少一个成像孔，所述感光组件与成像孔间隔设置，所述光学膜片上对应所述成像孔的位置设置有透光部。
  20. 根据权利要求16至19之一所述的液晶终端设备，其特征在于，所述导光板远离所述成像板的一面至成像孔轴心线中点的距离为物距hobject，该物距hobject满足公式：
    Figure PCTCN2014095140-appb-100003
    其中r为相邻两个成像孔的孔中心间距，α是成像孔的视场角。
  21. 根据权利要求20所述的液晶终端设备，其特征在于，相邻两个成像孔的孔中心间距r满足公式：r≥2·himagetg(α/2)，其中himage为像距，是感光组件至成像孔轴心线中点的距离，α是成像孔的视场角。
  22. 一种如权利要求1-8之一所述的图像采集装置的图像采集方法，其特征在于，包括以下步骤：
    将光源发射的至少部分光线射入导光板内，使射入导光板内的至少部分光线发生全反射传输；
    通过图像采集器采集导光板另一侧的被检测物图像。
  23. 根据权利要求22所述的图像采集装置的图像采集方法，其特征在于，所述通过图像采集器采集导光板另一侧的被检测物图像具体包括：
    在被检测物触摸的导光板表面建立多个扫描区域，使相邻的扫描区域之间相 互重叠；
    通过所述图像采集器对各扫描区域的部分被检测物取像，使各相邻成像区域图像不能混叠；
    将扫描获得的各成像区域图像进行拼接，获得完整的被检测物图像。
  24. 一种如权利要求14至21之一所述的液晶终端设备的图像采集方法，其特征在于，包括以下步骤：
    响应一控制信号使液晶板处于透光状态；
    将光源发射的至少部分光线射入导光板内，使射入导光板内的至少部分光线发生全反射传输；
    在液晶板一侧通过所述图像采集器对远离液晶板的导光板另一侧的被检测物进行图像采集。
  25. 根据权利要求24所述液晶终端设备的图像采集方法，其特征在于，所述在液晶板一侧通过所述图像采集器对远离液晶板的导光板另一侧的被检测物进行图像采集具体为：
    在被检测物触摸的导光板表面建立针对同一被检测物的多个扫描区域，使相邻的扫描区域之间相互重叠；
    逐一对各个扫描区域的部分被检测物取像，使各相邻成像区域图像不能重叠；
    将扫描获得的各成像区域图像进行拼接，获得完整的被检测物图像。
  26. 根据权利要求24所述液晶终端设备的图像采集方法，其特征在于，所述在液晶板一侧通过所述图像采集器对远离液晶板的导光板另一侧的被检测物进行图像采集具体为：
    在被检测物触摸的导光板表面建立针对同一被检测物的多个扫描区域，使相邻的扫描区域之间相互重叠；
    响应一控制信号使对应各个扫描区域的液晶板逐一处于透光状态；
    逐一对各个扫描区域的部分被检测物取像，使各相邻成像区域图像不能重叠；
    将扫描获得的各成像区域图像进行拼接，获得完整的被检测物图像。
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JP6340480B2 (ja) 2018-06-06
KR101909617B1 (ko) 2018-10-18
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US20170193270A1 (en) 2017-07-06
CN104182727A (zh) 2014-12-03
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US10083335B2 (en) 2018-09-25

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