CN209000039U - A kind of optical finger print identification mould group - Google Patents
A kind of optical finger print identification mould group Download PDFInfo
- Publication number
- CN209000039U CN209000039U CN201822125144.6U CN201822125144U CN209000039U CN 209000039 U CN209000039 U CN 209000039U CN 201822125144 U CN201822125144 U CN 201822125144U CN 209000039 U CN209000039 U CN 209000039U
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- China
- Prior art keywords
- optical filter
- optical
- mould group
- finger print
- image sensing
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- 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.)
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Abstract
The utility model discloses a kind of optical finger prints to identify mould group, including image sensing cell and module bracket, which is characterized in that has opening at the top of the module bracket；The optical finger print identification mould group further includes cover board, IR optical filter, and the cover board and IR optical filter stack gradually from top to bottom, are bonded and fix between the cover board and IR optical filter；The IR optical filter and cover board are arranged in module bracket top open part, and described image sensing unit is located at below IR optical filter, have spacing between the IR optical filter and image sensing cell.IR optical filter is attached to unlike the design on image sensing cell surface from existing optical finger print identification mould group, IR optical filter is fitted in below cover board by the utility model by the structure of change mould group, has spacing between IR optical filter and IR optical filter.Avoid IR optical filter and image sensing cell fitting can not accomplish it is absolute parallel, in certain thin regions toward when external diffusion, the Newton's ring phenomenon of appearance.
Description
Technical field
The utility model relates generally to technical field of intelligent equipment, relates more specifically to optical finger print identification mould group.
Background technique
As fingerprint is known by the development of technology, fingerprint recognition is widely used in smart machine, smart machine
It can be smart phone, tablet computer, vehicle-mounted computer, music player or navigator etc..Fingerprint recognition includes that ultrasonic wave refers to
Line identification and optical finger print identification, the unlock reaction speed of ultrasonic fingerprint identification at present is slow, and optical finger print unlock speed is fast, can
To match a variety of screens, therefore the prospect of optical finger print identification is wider.
Existing optical fingerprint identification module, including image sensing cell (Sensor) and IR optical filter, IR optical filter are logical
It crosses liquid glue (the permeable glue of light) and is attached to image sensing cell surface.Image sensing cell surface have it is reflective, when reflection light and
When incident ray is interfered, it is possible to Newton's ring can be generated.During the fitting of IR optical filter and image sensing cell, due to liquid
State glue than relatively thin, IR optical filter and image sensing cell can not accomplish again it is absolute parallel, in certain thin regions toward when external diffusion, meeting
There is film interference, i.e. Newton's ring phenomenon.The generation of Newton's ring, so that the recognition efficiency of optical fingerprint identification module reduces.
In order to avoid there is Newton's ring phenomenon, need liquid glue (the permeable glue of light) replacing DAF adhesive film (die attach
Film, DAF).But DAF adhesive film is expensive, and validity period is short.
Utility model content
The purpose of this utility model is in view of the above-mentioned drawbacks of the prior art, designing a kind of optical finger print identification mould
Group.
The utility model provides a kind of optical finger print identification mould group, including image sensing cell and module bracket, described
There is opening at the top of module bracket；The optical finger print identification mould group further includes cover board, IR optical filter, and the cover board and IR filter
Piece stacks gradually from top to bottom, is bonded and fixes between the cover board and IR optical filter；The IR optical filter and cover board are arranged in mould
Pack support top open part, described image sensing unit are located at below IR optical filter, the IR optical filter and image sensing cell
Between have spacing.
Further, light shield layer is provided on the cover board in the one side of IR optical filter, the light shield layer has one
Aperture, the aperture are transmission region.
Further, the IR optical filter is fixed with module bracket.
Further, the cover board is fixed with module bracket.
Further, there is the first optical adhesive layer between the cover board and IR optical filter.
Further, the spacing between described image sensing unit and IR optical filter is 0.01 ~ 0.05mm.
Further, the optical finger print identification mould group further includes the PCB circuit board positioned at module bracket bottom, the figure
As sensing unit is arranged in PCB circuit board.
Further, the module bracket bottom has opening, and the PCB circuit board is arranged in the module bracket bottom
Opening.
Further, the PCB circuit board is FPC flexible circuit board, and the bottom of the FPC flexible circuit board, which has, to be reinforced
Plate.
Further, there is the second optical adhesive layer between described image sensing unit and PCB circuit board.
It is compared to the prior art, the utility model has the following beneficial effects:
IR optical filter is attached to unlike the design on image sensing cell surface from existing optical finger print identification mould group,
IR optical filter is fitted in below cover board, between IR optical filter and IR optical filter by the utility model by the structure of change mould group
With spacing.Avoid IR optical filter and image sensing cell fitting can not accomplish it is absolute parallel, certain thin regions outward
When diffusion, the Newton's ring phenomenon of appearance.
Detailed description of the invention
Fig. 1 is that the optical finger print of the utility model embodiment identifies the structural schematic diagram of mould group.
Appended drawing reference:
10- image sensing cell, 20- module bracket, 30- cover board, 40-IR optical filter, 50-PCB wiring board.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figure 1, the utility model provides a kind of optical finger print identification mould group, including image sensing cell and mould group
Bracket.There is opening at the top of module bracket.Optical finger print identifies that mould group further includes cover board, IR optical filter.The upper surface of cover board is
The detection faces of finger print.Cover board and IR optical filter stack gradually from top to bottom, are bonded and fix between cover board and IR optical filter.IR
Optical filter and cover board are arranged in module bracket top open part.Described image sensing unit is located at below IR optical filter, the IR
There is spacing between optical filter and image sensing cell.
IR optical filter is attached to unlike the design on image sensing cell surface from existing optical finger print identification mould group,
IR optical filter is fitted in below cover board, between IR optical filter and IR optical filter by the utility model by the structure of change mould group
With spacing.Avoid IR optical filter and image sensing cell fitting can not accomplish it is absolute parallel, certain thin regions outward
When diffusion, the Newton's ring phenomenon of appearance.
It is provided with light shield layer in the one side of IR optical filter on cover board, due to having light shield layer, areflexia light on cover board
Interference, therefore Newton's ring will not be generated.Cover board generally comprises transparent substrate and on transparent substrate close to the one of IR optical filter
The light shield layer of face setting.Transparent substrate can be glass, plastics, sapphire etc., be commonly glass substrate, and light shield layer is to be plated in
Photomask on transparent substrate, the color of photomask can be black or other colors.Light shield layer has an aperture, described to open
Hole is transmission region.Light from optical finger print identification module internal passes through after transmission region is irradiated to the fingerprint of finger, warp
Image sensing cell is returned again to after the fingerprint reflection of finger.Preferably, the size of aperture is smaller, using pinhole imaging system, by image
It is imaged onto the surface of image sensing cell.
In the present embodiment, IR optical filter is fixed with module bracket, and IR optical filter seals optical transmission window.Cover board is fitted in entirely
On IR optical filter.Alternatively: in other fact Examples, cover board and module bracket can be fixed.IR optical filter
It is fitted in below cover board entirely.
There is the first optical adhesive layer, the first optical adhesive layer can be liquid glue, such as OCA between the cover board and IR optical filter
Liquid glue or DAF adhesive film.
The structure of IR optical filter includes substrate and IR material coating, and substrate can be glass baseplate or resin base material, IR filter
Mating plate is used to prevent external infrared ray interference and fingerprint is caused not identify normally.
Spacing between described image sensing unit and IR optical filter is 0.01 ~ 0.05mm.
Optical finger print identification mould group further includes the PCB circuit board positioned at module bracket bottom, and described image sensing unit is set
It sets in PCB circuit board.The module bracket bottom has opening, and the PCB circuit board is arranged in the module bracket bottom
Opening.
The PCB circuit board can be hardboard.PCB circuit board is adhesively fixed with module bracket bottom, module bracket and PCB
Wiring board forms an accommodation space.Cover board or IR optical filter together form a closed space, image with accommodation space
Sensing unit is located in closed space.
The PCB circuit board can also be FPC flexible circuit board, have stiffening plate in the bottom of FPC flexible circuit board.
It can be fixedly connected by pressing between FPC flexible circuit board and stiffening plate.
There is the second optical adhesive layer, image sensing cell passes through second between described image sensing unit and PCB circuit board
Optical adhesive layer is bonded in PCB circuit board.
Optical finger print identification mould group further includes transmitting light source, and transmitting light source is located at the lower section of cover board and is located at image sensing list
The side of member.Transmitting light source can be light emitting diode etc..
It is compared to the prior art, the utility model has the following beneficial effects:
IR optical filter is attached to unlike the design on image sensing cell surface from existing optical finger print identification mould group,
IR optical filter is fitted in below cover board, between IR optical filter and IR optical filter by the utility model by the structure of change mould group
With spacing.Avoid IR optical filter and image sensing cell fitting can not accomplish it is absolute parallel, certain thin regions outward
When diffusion, the Newton's ring phenomenon of appearance.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
All these improvement or transformation all should belong within the protection scope of the appended claims for the utility model.
Claims (10)
1. a kind of optical finger print identifies mould group, including image sensing cell and module bracket, which is characterized in that the module bracket
Top has opening；Optical finger print identification mould group further includes cover board, IR optical filter, the cover board and IR optical filter on to
Under stack gradually, between the cover board and IR optical filter be bonded fix；The IR optical filter and cover board are arranged on module bracket top
Portion's opening, described image sensing unit are located at below IR optical filter, have between the IR optical filter and image sensing cell
Spacing.
2. optical finger print as described in claim 1 identifies mould group, which is characterized in that close to the one of IR optical filter on the cover board
Light shield layer is provided on face, the light shield layer has an aperture, and the aperture is transmission region.
3. optical finger print as described in claim 1 identifies mould group, which is characterized in that the IR optical filter and module bracket are solid
It is fixed.
4. optical finger print as described in claim 1 identifies mould group, which is characterized in that the cover board is fixed with module bracket.
5. optical finger print as described in claim 1 identifies mould group, which is characterized in that have between the cover board and IR optical filter
First optical adhesive layer.
6. optical finger print as described in claim 1 identifies mould group, which is characterized in that described image sensing unit and IR optical filter
Between spacing be 0.01 ~ 0.05mm.
7. optical finger print as described in claim 1 identifies mould group, which is characterized in that the optical finger print identifies that mould group further includes
PCB circuit board positioned at module bracket bottom, described image sensing unit are arranged in PCB circuit board.
8. optical finger print as claimed in claim 7 identifies mould group, which is characterized in that the module bracket bottom has opening,
The PCB circuit board is arranged at the module bracket bottom opening.
9. optical finger print as claimed in claim 7 identifies mould group, which is characterized in that the PCB circuit board is the soft route of FPC
The bottom of plate, the FPC flexible circuit board has stiffening plate.
10. optical finger print as claimed in claim 7 identifies mould group, which is characterized in that described image sensing unit and PCB route
There is the second optical adhesive layer between plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822125144.6U CN209000039U (en) | 2018-12-18 | 2018-12-18 | A kind of optical finger print identification mould group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822125144.6U CN209000039U (en) | 2018-12-18 | 2018-12-18 | A kind of optical finger print identification mould group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209000039U true CN209000039U (en) | 2019-06-18 |
Family
ID=66808909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822125144.6U Active CN209000039U (en) | 2018-12-18 | 2018-12-18 | A kind of optical finger print identification mould group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209000039U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021097719A1 (en) * | 2019-11-20 | 2021-05-27 | 深圳市汇顶科技股份有限公司 | Under-screen fingerprint recognition device and system, light guide plate assembly and liquid crystal display screen |
-
2018
- 2018-12-18 CN CN201822125144.6U patent/CN209000039U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021097719A1 (en) * | 2019-11-20 | 2021-05-27 | 深圳市汇顶科技股份有限公司 | Under-screen fingerprint recognition device and system, light guide plate assembly and liquid crystal display screen |
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