CN204463158U - The fingerprint palm-print image capture device of honeycomb and terminal device - Google Patents
The fingerprint palm-print image capture device of honeycomb and terminal device Download PDFInfo
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- CN204463158U CN204463158U CN201520064095.3U CN201520064095U CN204463158U CN 204463158 U CN204463158 U CN 204463158U CN 201520064095 U CN201520064095 U CN 201520064095U CN 204463158 U CN204463158 U CN 204463158U
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Abstract
A kind of fingerprint palm-print image capture device of honeycomb and terminal device, image acquisition device comprises light guide plate and at least part of light being injected the light source in light guide plate, the one side of described light guide plate is provided with cellular board, described cellular board is densely covered with multiple through hole be parallel to each other, the diameter of described through hole is 0.5 micron-50 microns, and collected fingerprint or palmmprint size and the image equal and opposite in direction collected, the thickness of described cellular board is more than 5 times of through-hole diameter, hole center distance between adjacent through-holes is less than or equal to 50.8 microns, the another side of described cellular board is provided with photosensory assembly, this image acquisition device accessible site is in terminal device.The compact conformation of the fingerprint palm-print image capture device of the utility model honeycomb, thinner thickness, the contrast of fingerprint image and the adaptive faculty to dry wet finger can be improved, be integrated in terminal device, make terminal device possesses fingerprint, palm-print image capture function and this terminal device additionally increase parts few and cost is low.
Description
Technical field
The utility model relates to acquisition technology field, is specifically related to a kind of fingerprint palm-print image capture device of honeycomb and has the terminal device of this image acquisition device.
Background technology
Current fingerprint palm-print image capture device is applied in increasing field, the various electric terminals such as such as mobile phone, panel computer, televisor, and various safety-protection systems etc.Along with electric terminal is more and more tending towards ultrathin, the aspects such as the sharpness of the natural volume to the image acquisition device be integrated on electric terminal, thickness and collection image propose high requirement.
Existing fingerprint palm-print image capture device, such as thin optical fingerprint collector disclosed in 201120403301.0, generally include image acquisition prism, imaging device and image processing modules, wherein, described imaging device also comprises lens subassembly, and the parts such as photoelectric signal transformation circuit and digital processing unit.Owing to adopting image acquisition prism as the acquisition component of fingerprint light, sufficiently long light path must be had could to meet the imaging demand of light, particularly, also need the imaging being completed fingerprint light by described lens subassembly, more need the imaging demand meeting light compared with long light-path thus.Because image acquisition prism and lens subassembly itself have larger volume and thickness, add the factors such as optical path length, image acquisition device must be had collection that larger volume and thickness could realize fingerprint image.The high cost also brought due to associated components such as image acquisition prism and lens subassemblies and the complexity of structure, make existing image acquisition device be difficult to meet the requirement of various electric terminal to image acquisition device small size, low thinness, high-resolution.
Therefore, how to reduce the thickness of image acquisition device and improve the sharpness gathering image, becoming the technical barrier that the art personnel are urgently to be resolved hurrily.
Utility model content
The purpose of this utility model is the fingerprint palm-print image capture device and the terminal device that provide a kind of honeycomb, its compact conformation, thinner thickness, can improve the contrast of fingerprint image and the adaptive faculty to dry wet finger, and its cost is lower.
In order to achieve the above object, the utility model provides a kind of fingerprint palm-print image capture device of honeycomb, comprising light guide plate and at least part of light being injected the light source in light guide plate, the one side of described light guide plate is provided with cellular board, described cellular board is densely covered with multiple through hole be parallel to each other, the diameter of described through hole is 0.5 micron-50 microns, and collected fingerprint or palmmprint size and the image equal and opposite in direction collected, the thickness of described cellular board is more than 5 times of through-hole diameter, hole center distance between adjacent through-holes is less than or equal to 50.8 microns, the another side of described cellular board is provided with photosensory assembly.
Further, the axial line of described through hole and the horizontal plane angle of cellular board are for being more than or equal to 30 ° and being less than or equal to 90 °.
Further, described light source is arranged at the side of light guide plate and/or upper surface and/or lower surface.
Further, multiple described through hole is arrayed or arrangement straggly.
Further, the one side that described cellular board faces light guide plate is provided with diffuse reflector.
Further, described diffuse reflector is made up of the bulge-structure be arranged between each adjacent described through hole.
Further, arrange for interval between described light guide plate and cellular board or link together, arrange for interval between described cellular board and photosensory assembly or link together.
Further, described light source is fixed in light guide plate by support, described support is provided with guide-lighting groove, and described light source is arranged in guide-lighting groove, described guide-lighting groove be configured such that light that light source launches through its angle injected after in light guide plate and between normal be arcsin (n
0/ n
2) to arcsin (n
1/ n
2); Wherein, n
0for air refraction; n
1for contacting the refractive index of the body surface liquid of light guide plate; n
2for light guide plate refractive index.
Further, described cellular board is replaced by fibre optic plate, and described fibre optic plate is made up of multiple optical fiber be parallel to each other of dense distribution, and one end of described optical fiber is towards light guide plate, and the other end is towards photosensory assembly.
A kind of terminal device, comprising the fingerprint palm-print image capture device of described honeycomb.
After adopting such scheme, the utility model has following beneficial effect:
1, by light guide plate, cellular board, the fingerprint palm-print image capture device of the honeycomb of light source and photosensory assembly composition, its compact conformation, thickness reduces, it is after finger or palm stamp are in light guide plate, propagate destroying the total reflection of light in light guide plate, effusion light guide plate is irradiated to finger surface or palm surface by part light, form scattered light, scattered light has multiple angle, by the densely covered through hole be parallel to each other that cellular board is arranged, guarantee can only through the light of the single direction parallel with through hole, like this can the parasitic light of reasonable shielding multiple directions, and the size of through hole is set to only allow single light or light beam to enter through hole, and only imaging in very little scope, as 1 pixel, and make collected fingerprint or palmmprint size and the image equal and opposite in direction collected, these parallel with through hole or approximately parallel light will be irradiated on photosensory assembly through through hole and produce data image signal, for fingerprint or palmmprint collection, because its gully shape structure, adopt the photosensitive image contributing to obtaining high-contrast of directional light, namely, in the directional light of single direction that fingerprint or palm print back reflection are returned, the light intensity of fingerprint or the reflection of palmmprint crestal line can be larger than the light intensity of fingerprint or the reflection of palmmprint gully, and the image of such fingerprint ridge or palmmprint streakline will be more clear,
2, the utility model is by arranging diffuse reflector at cellular board near the one side of light guide plate, and design can destroy the total reflection propagation of the light in light guide plate further like this, effectively solves dry finger problem, makes it improve the dry wet adaptive faculty pointed;
3, by the terminal device integrated for the fingerprint palm-print image capture device of the utility model honeycomb, make terminal device add fingerprint, palmmprint acquisition function, the parts that this terminal device additionally increases are few and cost is low.
Accompanying drawing explanation
Fig. 1 is embodiment one structural representation of the fingerprint palm-print image capture device of the utility model honeycomb;
Fig. 2 is embodiment two structural representation of image acquisition device of the present utility model;
Fig. 3 is embodiment three structural representation of image acquisition device of the present utility model;
Fig. 4 is embodiment four structural representation of image acquisition device of the present utility model;
Fig. 5 is embodiment five structural representation of image acquisition device of the present utility model;
Fig. 6 is embodiment six structural representation of image acquisition device of the present utility model;
Fig. 7 is embodiment one structural representation of the utility model terminal device;
Fig. 8 is embodiment two structural representation of the utility model terminal device.
Embodiment
Below in conjunction with Figure of description, the utility model is further described.
Embodiment one structural representation of the fingerprint palm-print image capture device of the utility model honeycomb as shown in Figure 1, it comprises:
Light guide plate 1: the selection of light guide plate 1 is very extensive, such as glass plate and various transparent material;
Light source 2: at least part of light is injected in light guide plate 1, this light source 2 can be selected by LED, or other light-emitting component, do not limit herein, described light source 2 is arranged at the side of light guide plate and/or upper surface and/or lower surface, in this embodiment, light source 2 is arranged at the left surface of light guide plate 1, and it is directly fixed in light guide plate 1 by bonding way or other fixed form;
Cellular board 3: in the present embodiment, cellular board 3 is arranged at intervals at below described light guide plate 2, described cellular board 3 is densely covered with multiple through hole 4 be parallel to each other, this through hole 4 is typically chosen in circular hole, the axial line of through hole 4 and the horizontal plane angle of cellular board are for being more than or equal to 30 ° and being less than or equal to 90 °, and the angle of the present embodiment is 90 °.The diameter of described through hole 4 is 0.5 micron-50 microns, and the diameter of preferred through hole 4 is greater than 1 micron and is less than or equal to 5.8 microns.Select the diameter of each through hole 4 all equal in the present embodiment, also can be chosen as the unequal multiple through hole of diameter.Those through holes can arrange for array, also can be formula straggly arrangement.Be the scope of the utility model protection.The size of through hole is set to only allow single light or light beam to enter through hole in the present embodiment, and only imaging in very little scope, as 1 pixel, can certainly for being greater than a pixel; And the equal and opposite in direction of the size of the fingerprint gathered or palmmprint part and the fingerprint collected or palmprint image, be more than the scope of the utility model protection.The thickness of described cellular board 3 is more than 5 times of through hole 4 diameter, hole center distance between adjacent through-holes 4 is for being less than or equal to 50.8 microns, this embodiment selects 50.8 microns, and the image acquisition device of the densely covered through hole 4 of design like this can meet the resolution requirement of 500PPI.When selecting the hole center distance between adjacent through-holes 4 to be 25.4 microns, this image acquisition device can meet the resolution requirement of 1000PPI, when selecting the hole center distance between adjacent through-holes 4 to be 12.7 microns, this image acquisition device can meet the resolution requirement of 2000PPI;
And photosensory assembly 5: photosensory assembly 5 comprises CMOS or ccd image sensor, and this embodiment photosensory assembly 5 is by bonding or be spirally connected and be fixed on the lower surface of cellular board 3.
During use, light guide plate 1 provides finger or palm stamp, point or palm non-stamp time, the light that light source 2 is launched is injected in light guide plate 1, at least part of light is wherein had to transmit with total reflection form in light guide plate 1, when finger or palm stamp are at light guide plate 1 upper surface, because the refractive index of finger surface or palm surface is different with air, finger or palm surface have sweat, its refractive index and water are similar to, propagate destroying the total reflection of light in light guide plate 1, effusion light guide plate 1 is irradiated to finger surface or palm surface by part light, form scattered light, scattered light has multiple angle, and by cellular board 3 being parallel to each other and the through hole 4 gathered, guarantee can only through the light of the single direction parallel with through hole 4, like this can the parasitic light of reasonable shielding multiple directions, make the size of through hole 4 meet only allows single light or light beam to enter through hole simultaneously, make the detected fingerprint that collects or the only imaging on a pixel of palmmprint part, and gather fingerprint or palmmprint part size (i.e. the size of thing) equal with the fingerprint collected or palmprint image size (i.e. the size of picture), it is equivalent to fingerprint or palmmprint to regard as and is made up of the multiple object points gathered (object point size equals a pixel size), these object points are transmitted by the directional light of each through hole 4, by optical signal transmission to the imageing sensor of photosensory assembly 5, for fingerprint or palmmprint collection, because its gully shape structure, adopt the photosensitive image contributing to obtaining high-contrast of directional light, namely in the directional light of single direction that fingerprint or palm print back reflection are returned, the light intensity of fingerprint or the reflection of palmmprint crestal line can be larger than the light intensity of fingerprint or the reflection of palmmprint gully, the contrast of the fingerprint obtained or palmprint image improves, and the image of such fingerprint ridge or palmmprint streakline will be more clear.
What the utility model utilized is directional light image-forming principle: ensure to gather enough little thing, irradiates can become the picture of the same size with thing through directional light.
Embodiment two structural representation of the fingerprint palm-print image capture device of the utility model honeycomb as shown in Figure 2, its most of structure is identical with example structure described in above-mentioned Fig. 1, difference is: light source 2 is set to two, it is fixed on the two ends, left and right of the lower surface of light guide plate 1 respectively by support 6, the upper surface of each support 6 is respectively arranged with guide-lighting groove 7, two light sources 2 are positioned in two guide-lighting grooves 7 respectively, guide-lighting groove 7 be configured such that light that the light source 2 placed in it launches through its angle α injected after in light guide plate 1 and between normal be arcsin (n
0/ n
2) to arcsin (n
1/ n
2); Wherein, n
0for air refraction; n
1for contacting the refractive index of the body surface liquid of light guide plate 1; n
2for light guide plate refractive index, this angular range is derived by refraction law to draw, works as n
0=1.0, n
1=1.33, n
2=1.5, this angle α is between 41.8 degree to 62.5 degree, selects α to be 45 degree herein.The benefit of such design is: when not having finger or palm contacts light guide plate 1, the light that light source 2 injects this angular range in light guide plate 1 can be formed and laterally be totally reflected propagation (the total reflection light path see Fig. 2 is illustrated) in light guide plate 1, and when finger or palm contacts are to light guide plate 1, the total reflection of light in light guide plate 1 is propagated destroyed, form scattered light, scattered light passes the through hole 4 gathered, imaging on photosensory assembly 5.
Embodiment three structural representation of the fingerprint palm-print image capture device of the utility model honeycomb as shown in Figure 3, its most of structure is identical with example structure described in above-mentioned Fig. 1, difference is: photosensory assembly 5 is arranged at intervals at below cellular board 3, through hole 4 axial line on cellular board 3 tilts to the right, this through-bore axis is inclined with the angle of surface level for being more than or equal to 30 °, the present embodiment selects 45 °, and each through hole 4 is parallel to each other.
Such design, when finger or palm stamp are in light guide plate 1, destroy the total reflection of light in light guide plate 1 to propagate, effusion light guide plate 1 is irradiated to finger surface or palm surface by part light, form the scattered light of various angle, and only have or less parallel parallel with through hole 4, namely light is similarly inclined downward left, angle of inclination is 45 ° or can be irradiated on photosensory assembly 5 through through hole 4 close to the light of 45 °, effectively reduces the interference of external stray light line.And the finger print of this gully shape structure or palm palmmprint, adopt this kind of photosensitive image contributing to obtaining high-contrast of directional light.
Embodiment four structural representation of the fingerprint palm-print image capture device of the utility model honeycomb as shown in Figure 4, its most of structure is identical with example structure described in above-mentioned Fig. 1, difference is: light guide plate 1 is arranged on the upper surface of cellular board 3, wherein the upper surface of cellular board 3 is bonded with diffuse reflector 8, and this diffuse reflector 8 is made by mixing diffuse reflective particles in transparent adhesive tape.The setting of diffuse reflector 8 is the total reflection propagation in order to destroy the light in light guide plate 1 further, forms diffuse light upwards.Like this, light is totally reflected along light guide plate 1 on the one hand and propagates, and forms stray illumination on the one hand.This method is similar to a kind of implementation method of area source.Diffuse light will illuminate finger or palm surface, and some parallel rays reflects through densely covered through hole 4 imaging from finger surface or palm surface.When fingerprint or palmmprint gather, adopt diffuse illumination to add directional light imaging, effectively can solve the problem of dry finger, and obtain clear fingerprint image.
Embodiment five structural representation of the fingerprint palm-print image capture device of the utility model honeycomb as shown in Figure 5, its most of structure is identical with example structure described in above-mentioned Fig. 4, difference is: the through hole 4 axial line inclined downward left on cellular board 3, the angle of this axial line and surface level is for being more than or equal to 30 ° and being less than or equal to 90 °, the present embodiment selects 45 °, and each through hole 4 is parallel to each other.The diffuse reflector 8 of this cellular board 3 upper surface is made up of the bulge-structure 9 arranged between each adjacent described through hole 4, the setting of those bulge-structures 9, and the total reflection destroying the light in light guide plate 1 is further propagated, and forms diffuse light upwards.Light is propagated along light guide plate 1 inner total reflection on the one hand, and diffuse light will illuminate finger surface on the other hand, and some parallel rays reflects through densely covered parallel via holes 4 imaging from finger surface.
Embodiment six structural representation of the fingerprint palm-print image capture device of the utility model honeycomb as shown in Figure 6, its most of structure can be identical with arbitrary described example structure in above-mentioned Fig. 1-Fig. 5, difference is: described cellular board 3 is replaced by fibre optic plate 10, described fibre optic plate 10 is formed by multiple bonding fibers be parallel to each other of dense distribution, one end of described optical fiber is towards light guide plate 1, and the other end is towards photosensory assembly 5.Respective pixel element is independently transferred to the other end to photosensory assembly 5 from one end by every root optical fiber, does not interfere with each other between each optical fiber, and these intensive pixel elements become combination on photosensory assembly to form fingerprint or palmprint image.
Other structure of the present embodiment adopts identical with example structure described in Fig. 4, and its principle gathering image is identical with the cellular board principle in above-described embodiment, and gathers the existing utilization of technology of image with fibre optic plate, repeats no more herein.
The fingerprint palm-print image capture device of each honeycomb described above can be applicable in various terminal device.In the application, described image acquisition device can be used as standalone module and gathers fingerprint or palmmprint.Embodiment one structural representation of the utility model terminal device as shown in Figure 7, this terminal device 11 is provided with as arbitrary in above-mentioned Fig. 1-Fig. 6 as described in image acquisition device 12, this image acquisition device 12 is arranged on the marginal position of terminal device 11, this terminal device 11, as mobile phone, can be arranged on its HOME key.This terminal device 11 adds fingerprint, palmmprint acquisition function, and the parts that this terminal device 11 additionally increases are few and cost is low.
Embodiment two structural representation of the utility model terminal device as shown in Figure 8, it comprises the arbitrary described image acquisition device 12 of above-mentioned Fig. 1-Fig. 6, and this image acquisition device 12 is individual devices, and itself and terminal device 11 are connected to each other by wire and interface.
Those skilled in the art, at consideration instructions and after putting into practice utility model disclosed herein, will easily expect other embodiment of the present utility model.The application is intended to contain any modification of the present utility model, purposes or adaptations, and these modification, purposes or adaptations are followed general principle of the present utility model and comprised undocumented common practise in the art or conventional techniques means.Instructions and embodiment are only regarded as exemplary, and true scope of the present utility model and spirit are pointed out by claim below.
Should be understood that, the utility model is not limited to precision architecture described above and illustrated in the accompanying drawings, and can carry out various amendment and change not departing from its scope.Scope of the present utility model is only limited by appended claim.
Claims (10)
1. the fingerprint palm-print image capture device of a honeycomb, it is characterized in that, comprise light guide plate and at least part of light being injected the light source in light guide plate, the one side of described light guide plate is provided with cellular board, described cellular board is densely covered with multiple through hole be parallel to each other, the diameter of described through hole is 0.5 micron-50 microns, and collected fingerprint or palmmprint size and the image equal and opposite in direction collected, the thickness of described cellular board is more than 5 times of through-hole diameter, hole center distance between adjacent through-holes is less than or equal to 50.8 microns, the another side of described cellular board is provided with photosensory assembly.
2. the fingerprint palm-print image capture device of honeycomb as claimed in claim 1, it is characterized in that, the axial line of described through hole and the horizontal plane angle of cellular board are for being more than or equal to 30 ° and being less than or equal to 90 °.
3. the fingerprint palm-print image capture device of honeycomb as claimed in claim 2, is characterized in that, described light source is arranged at the side of light guide plate and/or upper surface and/or lower surface.
4. the fingerprint palm-print image capture device of honeycomb as claimed in claim 3, it is characterized in that, multiple described through hole is arrayed or arrangement straggly.
5. the fingerprint palm-print image capture device of honeycomb as claimed in claim 1, it is characterized in that, the one side that described cellular board faces light guide plate is provided with diffuse reflector.
6. the fingerprint palm-print image capture device of honeycomb as claimed in claim 5, it is characterized in that, described diffuse reflector is made up of the bulge-structure be arranged between each adjacent described through hole.
7. the fingerprint palm-print image capture device of honeycomb as claimed in claim 6, is characterized in that, arrange or link together between described light guide plate and cellular board for interval, arrange or link together between described cellular board and photosensory assembly for interval.
8. the fingerprint palm-print image capture device of honeycomb as claimed in claim 1, it is characterized in that, described light source is fixed in light guide plate by support, described support is provided with guide-lighting groove, described light source is arranged in guide-lighting groove, described guide-lighting groove be configured such that light that light source launches through its angle injected after in light guide plate and between normal be arcsin (n
0/ n
2) to arcsin (n
1/ n
2); Wherein, n
0for air refraction; n
1for contacting the refractive index of the body surface liquid of light guide plate; n
2for light guide plate refractive index.
9. the fingerprint palm-print image capture device of the honeycomb as described in one of claim 1-8, it is characterized in that, described cellular board is replaced by fibre optic plate, and described fibre optic plate is made up of multiple optical fiber be parallel to each other of dense distribution, one end of described optical fiber is towards light guide plate, and the other end is towards photosensory assembly.
10. a terminal device, is characterized in that, comprises the fingerprint palm-print image capture device of the described honeycomb of one of claim 1-9.
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| CN107871447B (en) * | 2016-09-26 | 2022-12-16 | 三星显示有限公司 | Display device and method for operating display device |
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