CN204631897U - The photocontrol assembly of optically detecting module - Google Patents
The photocontrol assembly of optically detecting module Download PDFInfo
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- CN204631897U CN204631897U CN201520323311.1U CN201520323311U CN204631897U CN 204631897 U CN204631897 U CN 204631897U CN 201520323311 U CN201520323311 U CN 201520323311U CN 204631897 U CN204631897 U CN 204631897U
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- led chip
- light guide
- guide plate
- light
- deflecting plate
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Abstract
The photocontrol assembly of the utility model optically detecting module, comprise the LED chip pedestal of conducting bracket and the coated with conductive support being provided with LED chip, this conducting bracket is provided with support pin, the outer layer glue shell of deflecting plate and the coated deflecting plate of part is provided with at described LED chip, described deflecting plate inside region is provided with the light guide plate of the luminous energy total reflection of birefringence, and the anaclasis luminous energy that LED chip sends by described deflecting plate enters light guide plate total reflection and propagates.The light sent owing to making LED chip is entered in light guide plate by deflecting plate refraction and carries out total reflection propagation, when light guide plate upper surface has finger presses, destroy the light total reflection in light guide plate, light path in light guide plate is changed, processed by the light of suitable sampler by the direction that changes, high-resolution fingerprint image can be obtained, this optically detecting module does not need scioptics just to obtain high-resolution fingerprint image, compact conformation, is widely used in safe class and requires high place and portable type electronic product.
Description
Technical field
The utility model relates to information acquisition recognition technology field, particularly a kind of photocontrol assembly of optically detecting module.
Background technology
Mobile terminal is in order to protect privacy of user, and be typically provided with to authorize and open, existing mandate unlatching comprises two kinds, and a kind of is opened by the password arranged by software cryptography, and its encryption is simple, and both the easy mode by breaking a code was opened, and easily forgot Password again.Another kind of mandate unlatching utilizes specific biological information, as fingerprint carries out authority checking unlatching.
Current collection fingerprint enters scheme as authorizing the two kinds of technology that have of opening, one is adopt pure optical image technology mode to gather finger print information, although the resolution of the fingerprint image gathered is up to 1000DPI, security is high, but the program needs scioptics to reflect to be realized, and thickness is comparatively large, propagates light path complicated, cannot be adapted to the higher mobile electronic product of volume requirement or the limited place of installing space, as smart mobile phone, panel computer etc.Another kind adopts semiconductor imaging technique mode to gather, fingerprint image is generated by contact electro-induction, resolution is generally at about 500DPI, although its volume can be lightening, but its resolution gathering image is not high, and it is little to gather image imaging area, easily occurs misreading erroneous judgement impact, the higher mobile terminal of security level required or place cannot be applied in.
Summary of the invention
The technical matters that the utility model mainly solves is to provide a kind of photocontrol assembly of optically detecting module, and the photocontrol assembly of this optically detecting module can realize the miniaturization of high-resolution fingerprint optically detecting module.
In order to solve the problem, the utility model provides a kind of photocontrol assembly of optically detecting module.The photocontrol assembly of this optically detecting module comprises; Be provided with the conducting bracket of LED chip and the LED chip pedestal of part coated with conductive support, this conducting bracket is provided with the support pin connecting LED chip and external control circuit, the outer layer glue shell of deflecting plate and the coated deflecting plate of part is provided with at described LED chip, described deflecting plate inside region is provided with the light guide plate LED chip reflected through deflecting plate being sent to luminous energy total reflection, and the anaclasis luminous energy that LED chip sends by described deflecting plate enters light guide plate total reflection and propagates.
Say further, described LED chip pedestal is provided with multiple projection, and the upper surface of this projection is greater than bottom it.
Say further, be provided with inside described outer layer glue shell and form trumpet-shaped inclined-plane.
Say further, circular arc convex lens structures in the middle of described light guide plate.
Say further, described support pin is bent into S or Z-shaped.
The photocontrol assembly of the utility model optically detecting module, comprise the LED chip pedestal of conducting bracket and the part coated with conductive support being provided with LED chip, this conducting bracket is provided with the support pin connecting LED chip and external control circuit, the outer layer glue shell of deflecting plate and the coated deflecting plate of part is provided with at described LED chip, described deflecting plate inside region is provided with the light guide plate LED chip reflected through deflecting plate being sent to luminous energy total reflection, and the anaclasis luminous energy that LED chip sends by described deflecting plate enters light guide plate total reflection and propagates.The light sent owing to making LED chip is entered in light guide plate by deflecting plate refraction and carries out total reflection propagation, when light guide plate upper surface has finger presses, destroy the light total reflection in light guide plate, light path in light guide plate is changed, processed by the light of suitable sampler by the direction that changes, high-resolution fingerprint image can be obtained, this optically detecting module does not need scioptics just can obtain the fingerprint image of desired resolution, compact conformation, can be widely used in safe class and require higher place and portable type electronic product.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, and the accompanying drawing in describing is embodiments more of the present utility model, to those skilled in the art, under the prerequisite not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is photocontrol Assemblies Example structural representation.
Fig. 2 is photocontrol Assemblies Example STRUCTURE DECOMPOSITION schematic diagram.
Fig. 3 is that photocontrol Assemblies Example faces structural representation.
Fig. 4 is C part-structure enlarged diagram in Fig. 2.
Fig. 5 is along A-A direction cross section structure schematic diagram in Fig. 3.
Fig. 6 is complete photocontrol Assemblies Example A-A direction structure schematic diagram.
Fig. 7 is photocontrol assembly forming method flow diagram.
Below in conjunction with embodiment, and with reference to accompanying drawing, the realization of the utility model object, functional characteristics and advantage are described further.
Embodiment
In order to make the object of utility model, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of the utility model protection.
As Figure 1-Figure 5, the utility model provides a kind of photocontrol Assemblies Example of the optically detecting module based on biological information.
Should comprise based on the photocontrol assembly of the optically detecting module of biological information; Be provided with the conducting bracket 1 of LED chip 11 and the LED chip pedestal 2 of part coated with conductive support 1, this conducting bracket 1 is provided with the support pin 12 connecting LED chip 11 and external control circuit, described LED chip 11 is provided with the outer layer glue shell 3 of deflecting plate 4 and the coated deflecting plate 4 of part, described deflecting plate 4 inside region is provided with the light guide plate 5 LED chip 11 being sent to light total reflection, and the anaclasis luminous energy that LED chip 11 sends by described deflecting plate 4 enters light guide plate 5 and is totally reflected propagation.
Specifically, described conducting bracket 1 adopts metal phosphor bronze tablet or other conductive materials.Described light guide plate 5 upper surface flushes with outer layer glue shell 3, and its end preferably contacts with deflecting plate 4, and the thickness of light guide plate 5 is identical with the deflecting plate end surface thickness contacted with it under normal circumstances, luminous energy is all refracted into and is totally reflected propagation into light guide plate 5.The utility model does not lie in the of light guide plate 5 material own, anyly in theory can carry out realizing visible ray and non-visible light being totally reflected the material passing ripple therein and all can realize, this light guide plate 5 can carry out being totally reflected the material propagated for adopting transparent PC or other light that can send LED chip 11, comprises nontransparent material.Described light guide plate 5 can adopt middle circular arc convex lens structures, realizes focusing on light better, when finger contact light guide plate 5, makes more light refraction on CCD or COMS imageing sensor, makes the fingerprint image of collection more clear.
Described LED chip 11 refers to and can send visible ray, as the LED chip of blue light, also can be the LED chip sending sightless line outside line, can also be that other can emitting components, described LED chip is only to state a kind of electroluminescent light source, is not limit electroluminescent light source.The quantity of this LED chip 11 can be established multiple as required, and its concrete quantity is not particularly limited to, and can need to arrange according to user, such as, when conducting bracket is square, can be arranged with two LED chips 11 on relative two limits.
Described LED chip pedestal 2 shape is arranged as required, usual employing circle or rectangle closed-in construction, multiple projection 21 is provided with at LED chip pedestal 2, the upper surface of this projection 1 is greater than bottom it, namely projection 21 has a side to be outward-dipping, can form with it more firm secure bond when being convenient to injection moulding deflecting plate 3 in finishing operations, phenomenon of avoiding occurring getting loose causes light leak.
Described outer layer glue shell 3 plays a protective role to light guide plate 5, deflecting plate 4 etc., and usually adopt light-proof material can avoid occurring light leakage phenomena, impact enters the light intensity that light guide plate 5 is totally reflected.Be provided with inside described outer layer glue shell 3 formed trumpet-shaped inclined-plane, can with reception destroys the imageing sensor being totally reflected the time coordinate time, be convenient to assemble.
During work, the light that LED chip sends enters light guide plate 5 through deflecting plate 4 refraction, and light can be propagated in the light guide plate can carrying out being totally reflected propagation.The light sent owing to making LED chip can be entered in light guide plate by deflecting plate overwhelming majority luminous energy and carry out total reflection propagation, make the intensity of the light of propagation larger, after this photocontrol assembly coordinates with imageing sensor, when light guide plate upper surface has finger presses, destroy the light total reflection in light guide plate, light path is changed and is projected to high-resolution fingerprint image imageing sensor obtaining pressing finger, its compact conformation, can be widely used in safe class and require higher place and the portable type electronic product higher to light requirement.
In the present embodiment, described support pin 12 structure is not particularly limited, and preferably support pin 12 is bent into S or Z-shaped, is convenient to photocontrol assembly to be fixed on pcb board be like this connected with control circuit.Described light guide plate 5 forms containing cavities 6 with outer layer glue shell 3, and this containing cavities 6 can reduce the thickness of the photocontrol module adopting photocontrol assembly and CCD or COMS imageing sensor composition well.
As Fig. 7 the utility model also provides a kind of photocontrol assembly forming method of optically detecting module, this photocontrol assembly forming method comprises: step S10, conducting bracket forming step, specifically, conducting strip is formed the conducting bracket forming a LED chip circuit part and the support pin 12 stretched to conduction stent outer edge as metal phosphor bronze tablet is placed on metal stamping die punching press.Conducting bracket 1 as shown in Figure 1, this conducting bracket 1 stretches the support pin 12 having and be connected with external control circuit to outer.The shape of described conducting bracket 1 is not particularly limited, and can mate, common square structure according to photoelectric gathering apparatus part, for the square structure that this is common, the conducting bracket of square structure forms the pad that can weld emitting LED chip; In order to improve ram efficiency, described metal phosphor bronze tablet can adopt continuous band-shaped, can realize continuous punching, and this punching press is crossed technique and can be adopted existing technology to realize.Described support pin 12 structure is not particularly limited, and preferably by its bending an angle of 90 degrees, is convenient to photocontrol assembly to be fixed on pcb board be like this connected with control circuit.
Step S11, LED chip pedestal forming step, specifically, the conducting bracket 1 that punching press in step S11 is formed is placed in special mould and carries out injection moulding, be coated with plastic cement in this conducting bracket surface portion, formed as the LED chip pedestal 2 in Fig. 2, when shaping, be first reserved with the space that LED chip 11 can be made to weld with conducting bracket 1 at conducting bracket 1, the LED chip pedestal of this LED chip weld locations is provided with clearance position, reveals the conducting bracket for welding LED chip at this clearance position Naked.
Described LED chip pedestal 2 is provided with multiple projection 21, and the upper surface of this projection 21 is greater than bottom it, and also namely projection 21 has a side to be outward-dipping, can form more firm secure bond when being convenient to injection moulding deflecting plate in finishing operations.At the coated LED chip pedestal 2 in described conducting bracket 1 upper part ground, one of its free-revving engine is exactly the intensity making conducting bracket 1 have adaptation, because little as conducting bracket 1 intensity of a circuit part, easily there is the phenomenons such as distortion when following process, affect shaping efficiency and yield rate.
Step S12, LED chip attachment step, specifically, arranged by special welding on the conducting bracket 1 emitting LED chip 11 is welded in described LED chip pedestal 2, the conducting bracket being welded in described LED chip pedestal 2 clearance position by LED chip 11 is formed with conducting bracket and is electrically connected, luminous when conducting bracket 1 is energized.The quantity of described LED chip 11 can be established multiple as required, and its concrete quantity is not particularly limited to, and can need to arrange according to user, such as, when LED chip pedestal 2 is square, can be arranged with two LED chips 11 on relative two limits.Described LED chip refers to and can send visible ray, as the LED chip of blue light, also can be the LED chip sending sightless line outside line, can also be that other can emitting components, described LED chip is only to state a kind of electroluminescent light source, is not limit electroluminescent light source.
Step S13, deflecting plate forming step, specifically, the LED chip pedestal 2 posting LED chip 11 is placed on injection moulding on special mould, the deflecting plate 4 that light orientation refraction LED chip 11 Surface coating being had sent by LED chip 11 is propagated, the light that LED chip 11 sends is transmitted in light guide plate 5 by deflecting plate 4 refraction that is evenly distributed, and the light simultaneously avoiding LED chip 11 to send occurs uneven phenomenon in zones of different; As much as possible the reflexing in light guide plate of light that simultaneously LED chip 11 can be sent is totally reflected, and improves LED chip light intensity output intensity.Described deflecting plate 4 can adopt pmma material light being had to refraction action, also can be that other can have the material of refraction action to light, the utility model does not lie in the of deflecting plate material own, and any anaclasis that LED chip can be sent can realize to material in light guide plate in theory.
When adopting blue-light LED chip, in deflecting plate 4, evenly can be provided with fluorescent powder, when reflecting blue light, can make blue light after refraction, become white light by fluorescent powder and entering light guide plate 4 total reflection propagation.
Step S14, outer layer glue shell structure forming step, specifically, be placed on coordinating fixing deflecting plate 4 with LED chip pedestal 2 on special mould and carry out injection moulding, form the outer layer glue shell 3 that birefringence plate 4 part is coated, luminous energy can be spread in light guide plate 5 from assigned direction from deflecting plate 4 and propagate; This outer layer glue shell 3 plays the outer layer glue shell 3 of protection simultaneously to LED chip 11.Because outer layer glue shell 3 limits the scope of the light warp nearly refraction bright dipping that LED chip 11 sends, the direction controlling that light is propagated reaches the light fermentation of needs.Be provided with inside described outer layer glue shell 3 and form trumpet-shaped inclined-plane, be convenient to imageing sensor and install.
Step S15, forming light guide plate step, specifically, is placed on injection moulding on particular manufacturing craft by the outer layer glue shell 3 that above-mentioned steps S14 obtains, being formed at outer layer glue shell 3 upper surface to make light carry out the light guide plate 5 be totally reflected, the end face of this light guide plate 5 and the end face of deflecting plate 4.Described light guide plate 5 forms with outer layer glue shell 3 containing cavities 6 that can receive imageing sensor, and the light that LED chip 11 sends enters in light guide plate 11 and carries out total reflection propagation under deflecting plate 4 reflects.In order to make described light guide plate 5 focus on the light that light path changes better, the middle circular arc convex lens structures of this light guide plate 5.
The utility model does not lie in of light guide plate 5 material itself, anyly in theory can carry out realizing visible ray and non-visible light being totally reflected the material passing ripple therein and all can realize.Described step S14 and step S15 can as required in no particular order, namely also can first step S15, then carry out step S14 operation.
Finally also comprise the step that conducting bracket is separated, the redundance formed by the outside punching press of described conducting bracket 1 is separated with conducting bracket 1, forms complete photocontrol assembly, as shown in Figure 6.With regard to the used time, at described containing cavities 6 and imageing sensor, as the imageing sensor such as CCD or COMS coordinates, this containing cavities 6 deep just suitable with the thickness of CCD or COMS imageing sensor when designing, cover on CCD or COMS imageing sensor, its thickness can be reduced.The light that LED chip 11 on photocontrol assembly sends after being energized enters light guide plate 5 by deflecting plate 4 refraction and carries out total reflection propagation, when finger contact light guide plate 5, destroy light guide plate 5 to be totally reflected, the light direction of contact site is propagated, by CCD or COMS imageing sensor by the process high-resolution fingerprint of existence and sweat gland image to CCD or the COMS imageing sensor being positioned at light guide plate 5 bottom.Existing CCD or COMS image sensor technologies is ripe, makes the fingerprint image of collection up to 1000-2000DPI, is widely used in safe class and requires higher place, and the portable type electronic product safety certification etc. higher to light requirement.
LED chip described in the present embodiment also can comprise single, two or many light lotus roots receive LED chip, when light lotus root reception LED chip is set, destroy light total reflection to propagate when finger contact light guide plate 5, make light lotus root receive LED chip and cannot receive the light launched LED chip and send, light lotus root receives LED chip cannot obtain corresponding signal, photocontrol assembly this kind of status signal can be used as gauge tap.
Total reflection propagation is carried out because the light of LED chip generation can be dropped into light guide plate by photocontrol assembly easily after refraction, the light that LED chip is produced enters light guide plate abundantly, increase the intensity of light, simultaneously even by the Light distribation of LED chip generation after deflecting plate refraction, the thickness of this photocontrol assembly is little, compact conformation, making high-resolution optics collection fingerprint be widely used in portable type electronic product becomes possibility.
Above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or equivalent replacement is carried out to wherein portion of techniques feature, and these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (5)
1. the photocontrol assembly of optically detecting module, it is characterized in that, comprise: be provided with the conducting bracket of LED chip and the LED chip pedestal of part coated with conductive support, this conducting bracket is provided with the support pin connecting LED chip and external control circuit, described LED chip is provided with the outer layer glue shell of deflecting plate and the coated deflecting plate of part, described deflecting plate inside region is provided with the light guide plate to luminous energy total reflection, and the anaclasis luminous energy that LED chip sends by described deflecting plate enters light guide plate total reflection and propagates.
2. the photocontrol assembly of optically detecting module according to claim 1, is characterized in that: described LED chip pedestal is provided with multiple projection, and the upper surface of this projection is greater than bottom it.
3. the photocontrol assembly of optically detecting module according to claim 1 or 2, is characterized in that, is provided with and forms trumpet-shaped inclined-plane inside described outer layer glue shell.
4. the photocontrol assembly of optically detecting module according to claim 1, is characterized in that, circular arc convex lens structures in the middle of described light guide plate.
5. the photocontrol assembly of optically detecting module according to claim 1, it is characterized in that, described support pin is bent into S or Z-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520323311.1U CN204631897U (en) | 2015-05-19 | 2015-05-19 | The photocontrol assembly of optically detecting module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520323311.1U CN204631897U (en) | 2015-05-19 | 2015-05-19 | The photocontrol assembly of optically detecting module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204631897U true CN204631897U (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520323311.1U Expired - Fee Related CN204631897U (en) | 2015-05-19 | 2015-05-19 | The photocontrol assembly of optically detecting module |
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| Country | Link |
|---|---|
| CN (1) | CN204631897U (en) |
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2015
- 2015-05-19 CN CN201520323311.1U patent/CN204631897U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150909 Termination date: 20180519 |
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| CF01 | Termination of patent right due to non-payment of annual fee |