CN111178240A - Electronic equipment for fingerprint identification - Google Patents
Electronic equipment for fingerprint identification Download PDFInfo
- Publication number
- CN111178240A CN111178240A CN201911374361.1A CN201911374361A CN111178240A CN 111178240 A CN111178240 A CN 111178240A CN 201911374361 A CN201911374361 A CN 201911374361A CN 111178240 A CN111178240 A CN 111178240A
- Authority
- CN
- China
- Prior art keywords
- light guide
- infrared light
- fingerprint identification
- fingerprint
- electronic device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Image Input (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention discloses electronic equipment for fingerprint identification, which comprises a glass cover plate, an LCD (liquid crystal display) panel, a backlight module and a fingerprint identification sensor, wherein the glass cover plate, the LCD panel, the backlight module and the fingerprint identification sensor are sequentially stacked from top to bottom. The electronic device further comprises an infrared light emitter and a light guide mechanism. The infrared light emitter and the glass cover plate are in optical transmission through the light guide mechanism, so that infrared light transmits an infrared light emission signal on the glass cover plate through the light guide mechanism. The electronic equipment can effectively transmit the fingerprint identification signal on the fingerprint identification terminal equipment and accurately collect the biological fingerprint information, and meanwhile, the display picture quality of the LCD display screen is not influenced.
Description
Technical Field
The invention relates to the technical field of communication, in particular to electronic equipment for fingerprint identification in an LCD screen.
Background
Fingerprint sensing and matching is a reliable and widely used technique. A common method of fingerprint identification involves scanning a sample fingerprint or an image thereof and storing the image and/or unique features of the fingerprint image, which can be compared with information of reference fingerprints already present in a database to determine the correct identification of the user, e.g. for authentication purposes. In particular, in-display (in-display) fingerprinting is now becoming increasingly popular due to its ease of operation and versatility and its suitability for compact portable electronic devices.
Fingerprint identification display device obviously has bigger use scene scope and better cost advantage than fingerprint identification display device in the OLED screen in the LCD screen, but, fingerprint identification display device is not yet completely ripe in the screen based on LCD display, especially can not compromise effective penetration and the accurate collection of fingerprint identification signal on the LCD module.
In the in-screen fingerprint recognition display device of the LCD display, as shown in fig. 1, by recognizing a fingerprint pressed on a glass cover plate 104 covering the LCD display screen; however, the optical signal for identifying the fingerprint at least passes through the LCD panel and the glass cover plate 104, and since the LCD panel is composed of the LCD module 102 and the backlight device 101, the glass cover plate has a certain thickness. Therefore, the optical signal is severely refracted and scattered, or even totally reflected, during the process of transmitting through the LCD module, the backlight device and the glass cover plate. In addition, when the fingerprint recognition unit 103 is placed above the backlight device, from the viewing angle of the display screen, the transmittance of the display area below which the fingerprint recognition unit is disposed is lower than that of the other display areas where the fingerprint recognition unit is not disposed, while the LED backlight source at the bottom provides a uniform planar light source, the display area below which the fingerprint recognition unit is disposed is darker than the other areas, and the display area of the liquid crystal display device is not uniform in brightness.
Accordingly, there is a need for an improved overall design for an on-screen fingerprint identification display device based on the implementation of on-screen fingerprint identification for LCD displays.
Disclosure of Invention
The invention mainly solves the technical problem of providing the electronic equipment for fingerprint identification in the LCD screen, which can effectively spread fingerprint identification signals on fingerprint identification terminal equipment and accurately collect biological fingerprint information without influencing the display picture quality of the LCD screen.
In order to solve the technical problem, the electronic equipment for fingerprint identification comprises a glass cover plate, an LCD (liquid crystal display) panel, a backlight module and a fingerprint identification sensor which are sequentially stacked from top to bottom. The electronic device further comprises an infrared light emitter and a light guide mechanism. The infrared light emitter and the glass cover plate are in optical transmission through the light guide mechanism, so that infrared light is transmitted to the glass cover plate through the light guide mechanism to emit an infrared light emitting signal. The fingerprint identification sensor comprises an optical sensor element to receive and/or transmit a biometric fingerprint optical signal; the biological fingerprint optical signal is infrared light.
According to the electronic equipment for fingerprint identification, the light guide mechanism effectively transmits the infrared signals to the glass cover plate through the arrangement of the light guide mechanism, and the transmission path bypasses the LCD (liquid crystal display) panel and the backlight module, so that the loss of the infrared signal transmission process is greatly reduced, the biological fingerprint information is accurately and effectively collected, the brightness and the uniformity of the visible light source of the fingerprint identification terminal equipment are kept, the in-screen fingerprint identification function identification of the fingerprint identification terminal equipment is realized, and the display picture quality of the fingerprint identification terminal equipment is not influenced.
The backlight module comprises a light source, a light guide plate arranged on one side of the light source, a reflecting sheet arranged below the light guide plate, a diffusion sheet arranged above the light guide plate, and a prism sheet arranged above the diffusion sheet; the fingerprint identification sensor is arranged below the reflector plate.
In a preferred embodiment, the light guide mechanism is a light guide film, and the surface of the light guide film is provided with a light coupling structure and/or a light guide structure, so that infrared light is transmitted in the light guide film.
In a preferred embodiment, the surface of the light guiding film is provided with a reflective coating, and the light guiding film is connected with the infrared light emitter.
In a preferred embodiment, a light guide structure is disposed on a light exit surface of the light guide film, so that infrared light is emitted on an upper surface of the glass cover plate.
In a preferred embodiment, the infrared light emitter is disposed below the backlight module, and the light guide film extends from the side edges of the LCD panel and the backlight module to the glass cover plate.
In a preferred embodiment, the infrared light emitter is arranged on the fingerprint recognition sensor.
In a preferred embodiment, the infrared light emitter is arranged on the side surface of the backlight module.
The fingerprint identification sensor comprises an optical sensor element to receive and/or transmit a biometric fingerprint optical signal; the biological fingerprint optical signal is infrared light.
In a preferred embodiment, the electronic device for fingerprint identification further includes an iron frame, and the infrared light emitter is disposed between the iron frame and the backlight module; or the infrared light emitter is embedded in the through hole of the iron frame; or the infrared light emitter is arranged below the iron frame.
Drawings
The invention and its advantages will be better understood by studying the following detailed description of specific embodiments, given by way of non-limiting example, and illustrated in the accompanying drawings, in which:
FIG. 1 is an exploded view of an on-screen fingerprint identification display device of a prior art LCD display.
Fig. 2 is a cross-sectional structural diagram of an electronic device for fingerprint identification according to embodiment 1 of the present invention.
Fig. 3 is an exploded view of an electronic device for fingerprint recognition according to embodiment 1 of the present invention.
Fig. 4 is an exploded view of a backlight module of an electronic device for fingerprint identification according to embodiment 1 of the present invention.
Fig. 5 is an exploded view of an electronic device for fingerprint identification according to embodiment 2 of the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
The following description of the various embodiments refers to the accompanying drawings that illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], are only referring to the directions of the attached drawings. The positional or positional relationships indicated are based on those shown in the drawings and are merely for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
In the description of the present invention, it should be noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may for example be fixed or indirectly connected through intervening media, or may be interconnected between two elements or may be in the interactive relationship between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example 1
First, the electronic device for fingerprint identification according to embodiment 1 of the present invention is illustrated by fig. 2-4, which includes a glass cover plate 140, an LCD panel 130, a backlight module 120 and a fingerprint identification sensor 110 stacked in sequence from top to bottom. The electronic device further comprises an infrared light emitter 100 and a light guiding mechanism 101. The infrared light emitter 100 and the glass cover plate 140 are optically transmitted through the light guide mechanism 101, so that infrared light emits an infrared light emission signal on the glass cover plate 140 through the light guide mechanism 101. The fingerprint recognition sensor 110 includes an optical sensor element to receive and/or transmit a biometric fingerprint optical signal; the biological fingerprint optical signal is infrared light.
The electronic equipment for fingerprint identification of this embodiment, setting through light guide mechanism 101, light guide mechanism 101 is with infrared signal effective transmission to glass apron 140, LCD liquid crystal display panel 130 and backlight unit 120 have been walked around to its propagation path, therefore infrared signal propagation process's loss has been reduced by a wide margin, and then gather biological fingerprint information accuracy effectively, the luminous luminance and the degree of consistency of the visible light source who keeps fingerprint identification terminal equipment simultaneously, and then realize fingerprint identification function identification in fingerprint identification terminal equipment's the screen, do not influence fingerprint identification terminal equipment's display picture quality simultaneously.
As shown in fig. 4, the backlight module 120 includes a light source 10 and a light guide plate 12 disposed at one side of the light source, a reflective sheet 11 disposed below the light guide plate 12, a diffusion sheet 13 disposed above the light guide plate 12, a lower prism sheet 14 disposed above the diffusion sheet 13, and an upper prism sheet 15 disposed above the lower prism sheet 14; the fingerprint recognition sensor 110 is disposed under the reflective sheet 11.
The light guide mechanism 101 is a light guide film 101, and a light coupling structure and/or a light guide structure are/is disposed on a surface of the light guide film 101, so that infrared light is transmitted in the light guide film 101. The surface of the light guide film 101 is provided with a reflective coating, and the light guide film 101 is connected with the infrared light emitter 100. The reflective coating layer is preferably formed of porous or hollow silica particles, fluorine-based resin, or dielectric such as CaF2, MgF2, NaAlF4, SiO2, ThF4, ZrO2, Nd2O3, SnO2, TiO2, CeO2, ZnS, In2O3, or the like, which is formed by a dry coating method or a wet coating method. On the other hand, when the body transparent layer of the light guide plate has a sufficiently high refractive index, the transparent layer may include a general resin having a refractive index of about 1.5, such as glass, polyolefin, olefin copolymer, acryl, polyethylene, polyurethane, ether polymer including polyacetal and epoxy resin, polysiloxane, and the like.
A light guide structure is disposed on the light exit surface of the light guide film 101, so that infrared light is emitted on the upper surface of the glass cover plate 140.
The infrared light emitter 100 is disposed below the backlight module 120, and the light guide film 101 extends from the LCD panel and the side of the backlight module 120 to the glass cover plate 140. The infrared light emitter 100 is disposed on the fingerprint recognition sensor 110.
The fingerprint recognition sensor 110 includes an optical sensor element to receive and/or transmit a biometric fingerprint optical signal; the biological fingerprint optical signal is infrared light.
The electronic device for fingerprint identification further comprises an iron frame, and the infrared light emitter 100 is embedded in a through hole of the iron frame.
Example 2
Fig. 5 is an exploded view of a backlight module of a fingerprint identification terminal device according to embodiment 2 of the present invention. Only the differences between embodiment 2 and embodiment 1 will be described below, and the descriptions of the similarities will be omitted.
The infrared light emitter 100 is disposed at a side of the backlight module 120. The fingerprint sensor 110 is disposed under the backlight module 120.
While the invention has been described above with reference to certain embodiments, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the various embodiments of the present disclosure may be used in any combination, provided that there is no structural conflict, and the combination is not exhaustively described in this specification for brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. An electronic device for fingerprint identification is characterized by comprising a glass cover plate, an LCD (liquid crystal display) panel, a backlight module and a fingerprint identification sensor which are sequentially stacked from top to bottom; and
a light guide mechanism and an infrared light emitter;
the infrared light emitter and the glass cover plate are in optical transmission through the light guide mechanism, so that infrared light is transmitted to the glass cover plate through the light guide mechanism to emit an infrared light emitting signal.
2. The electronic device for fingerprint recognition of claim 1, wherein: the light guide mechanism is a light guide film, and the surface of the light guide film is provided with a light coupling structure and/or a light guide structure so that infrared light is transmitted in the light guide film.
3. The electronic device for fingerprint recognition of claim 2, wherein: the surface of the light guide film is provided with a reflective coating, and the light guide film is connected with the infrared light emitter.
4. The electronic device for fingerprint recognition of claim 2, wherein: the light guide film is arranged on the light guide film, and the light guide film is arranged on the light guide film.
5. The electronic device for fingerprint recognition of claim 1, wherein: the infrared light emitter is arranged below the backlight module, and the light guide film extends to the glass cover plate from the LCD panel and the side edge of the backlight module.
6. The electronic device for fingerprint recognition of claim 1, wherein: the infrared light emitter is arranged on the fingerprint identification sensor.
7. The electronic device for fingerprint recognition of claim 1, wherein: the infrared light emitter is arranged on the side face of the backlight module.
8. The electronic device for fingerprint recognition of claim 1, wherein: the backlight module comprises a light source, a light guide plate arranged on one side of the light source, a reflecting sheet arranged below the light guide plate, a diffusion sheet arranged above the light guide plate, and a prism sheet arranged above the diffusion sheet; the fingerprint identification sensor is arranged below the reflector plate.
9. The electronic device for fingerprint recognition of claim 1, wherein: the fingerprint identification sensor comprises an optical sensor element to receive and/or transmit a biometric fingerprint optical signal; the biological fingerprint optical signal is infrared light.
10. The electronic device for fingerprint recognition of claim 1, wherein: the electronic equipment for fingerprint identification further comprises an iron frame, and the infrared light emitter is arranged between the iron frame and the backlight module; or the infrared light emitter is embedded in the through hole of the iron frame; or the infrared light emitter is arranged below the iron frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911374361.1A CN111178240A (en) | 2019-12-27 | 2019-12-27 | Electronic equipment for fingerprint identification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911374361.1A CN111178240A (en) | 2019-12-27 | 2019-12-27 | Electronic equipment for fingerprint identification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111178240A true CN111178240A (en) | 2020-05-19 |
Family
ID=70654075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911374361.1A Pending CN111178240A (en) | 2019-12-27 | 2019-12-27 | Electronic equipment for fingerprint identification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111178240A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207799711U (en) * | 2017-09-25 | 2018-08-31 | 金佶科技股份有限公司 | biological characteristic identification module |
| CN108596080A (en) * | 2018-04-20 | 2018-09-28 | Oppo广东移动通信有限公司 | Fingerprint recognition component, display device and electronic device |
| CN109564629A (en) * | 2018-10-15 | 2019-04-02 | 深圳市汇顶科技股份有限公司 | Finger print detection device and terminal device with fingerprint identification function |
| CN110308586A (en) * | 2019-06-28 | 2019-10-08 | 深圳市隆利科技股份有限公司 | Backlight module and electronic equipment |
-
2019
- 2019-12-27 CN CN201911374361.1A patent/CN111178240A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207799711U (en) * | 2017-09-25 | 2018-08-31 | 金佶科技股份有限公司 | biological characteristic identification module |
| CN108596080A (en) * | 2018-04-20 | 2018-09-28 | Oppo广东移动通信有限公司 | Fingerprint recognition component, display device and electronic device |
| CN109564629A (en) * | 2018-10-15 | 2019-04-02 | 深圳市汇顶科技股份有限公司 | Finger print detection device and terminal device with fingerprint identification function |
| CN110308586A (en) * | 2019-06-28 | 2019-10-08 | 深圳市隆利科技股份有限公司 | Backlight module and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110516591B (en) | Fingerprint identification terminal equipment based on optical sensor | |
| CN110376794A (en) | Backlight module and electronic equipment for fingerprint recognition | |
| JP2019117619A (en) | Optical fingerprint sensor | |
| CN111095289B (en) | Fingerprint recognition device under screen and terminal equipment | |
| CN110991407A (en) | Fingerprint identification terminal equipment | |
| CN110414467A (en) | Fingerprint recognition terminal device | |
| CN211319239U (en) | Optical fingerprint detection device, touch screen and electronic equipment | |
| CN110068957A (en) | Backlight module and LCD display device for fingerprint recognition in LCD screen | |
| CN110308586A (en) | Backlight module and electronic equipment | |
| CN112334909A (en) | Optical fingerprint detection device, touch screen and electronic equipment | |
| KR101746485B1 (en) | Apparatus for sensing multi touch and proximated object and display apparatus | |
| WO2020181447A1 (en) | Optical film layer structure, backlight module, display apparatus and electronic device | |
| KR20150014118A (en) | Display apparatus | |
| US20220165081A1 (en) | In-screen fingerprint identification apparatus and electronic device | |
| CN110110701A (en) | A kind of fingerprint recognition mould group | |
| CN210488188U (en) | Quantum dot backlight module and electronic equipment | |
| CN210109513U (en) | Backlight module for fingerprint identification in LCD screen | |
| CN210894926U (en) | Reflective film, backlight module, liquid crystal display and fingerprint recognition device under screen | |
| CN111242039A (en) | Fingerprint identification electronic equipment | |
| WO2021146957A1 (en) | Optical fingerprint detection device, touch screen and electronic device | |
| CN111178240A (en) | Electronic equipment for fingerprint identification | |
| CN211826824U (en) | Backlight module for face recognition | |
| CN210109371U (en) | Brightness enhancement film | |
| CN210803918U (en) | Fingerprint identification backlight unit | |
| US11288486B2 (en) | Fingerprint recognition optical film, and backlight unit and liquid crystal display device comprising the film optical |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |