法国专利FR3021780A1 DIGITAL FOOTPRINT SENSOR MODULE

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专利摘要:
A fingerprint sensor module (100) includes a lens (2), a filter (30), a first reflector (31), an image capture module (4) for capturing a first fingerprint image and a second fingerprint image, and at least a first light source (1) for providing the necessary light source at the time the image capture module (4) captures the image fingerprint. An upper surface and a lower surface of the lens (2) are flat. The lens (2) defines at least a first zone (21) and a second zone (22). The filter (30) is disposed under the lens (2). The filter (2) is in correspondence of the first zone (21) of the lens (2) to reflect the first fingerprint image corresponding to the first zone (21). The first reflector (31) is disposed under the lens (2). The first reflector (31) is in correspondence of the second zone (22) of the lens (2) to reflect the second fingerprint image corresponding to the second zone (22).
公开号:FR3021780A1
申请号:FR1458320
申请日:2014-09-05
公开日:2015-12-04
发明作者:Ssu Hsuan Chou；Nien Ting Weng；Sheng Yuan Lin
申请人:Cheng Uei Precision Industry Co Ltd；
IPC主号:

专利说明:

[0001] The present invention generally relates to a fingerprint sensor module, and more particularly to an optical fingerprint sensor module. Currently, optical fingerprint sensor modules and capacitive fingerprint sensor modules are consumer products of 10 fingerprint sensor modules on the market. In general, the high density capacitive fingerprint sensor module is integrated in a chip. When a fingerprint is pressed down on a surface of the chip, the capacitive digital fingerprint sensor module detects a fingerprint image through different amounts of electric charge of fingerprint peaks and troughs. . The advantage of the capacitive fingerprint sensor module is its thinness. But the capacitive fingerprint sensor module has a higher cost, lower detection accuracy, and shorter life. The optical fingerprint sensor module captures the fingerprint image according to the imaging principle. In comparison with the capacitive fingerprint sensor module, the optical fingerprint sensor module has the advantages of higher identification, lower price and longer life. But the imaging system needs to keep a certain distance from the lens to the sensor to form the fingerprint image clearly. The imaging light path causes a size of the optical fingerprint sensor module to become larger and thicker. 3021780 2 Due to the fact that a common electronic product is being developed in a slimming trend, factories wish to manufacture optical fingerprint sensor modules each of which has a thinner structure than the previous one to be suitable for internal structures thinner electronic products. The current optical fingerprint sensor module shortens the rectilinear distance between the sensor and the lens to reduce the thickness of the optical fingerprint sensor module by an imaging light path refracted by a prism. For example, US Patent No. 8405757 discloses a conventional embodiment in which a component pressed by the fingerprint is the prism. By a refractive characteristic of a light, the fingerprint image is formed by a prism. This allows the fingerprint image to be formed through a total internal reflection light path through the prism to the lens.
[0002] According to another conventional technology, in order to satisfy the need for thinness, the difference is that some are started by a special lens structure, or a variety of lenses with complex structures are designed to reduce the thickness of the sensor module. optical fingerprint to increase a possibility of being applied in a cell phone or a tablet computer. However, a refractive path structure of the current optical fingerprint sensor module is complex, which leads to the fact that the cost of the fingerprint sensor module is higher and the thickness of the sensor module of Optical fingerprint has no chance of being less than 6.5 mm.
[0003] Thus, it is difficult to manufacture the current optical fingerprint sensor module in mass production. In view of this, it is essential to provide an optical fingerprint sensor module with a simple structure, a lower cost and a thickness of less than 6.5 mm. The object of the present invention is to provide a fingerprint sensor module. The fingerprint sensor module comprises a lens, a filter, a first reflector, an image capture module for capturing the first corresponding the first filter, and the second fingerprint image area and reflected by the image. fingerprint 15 corresponding to the second area and reflected by the first reflector, and at least a first light source for providing the necessary light source at the time the image capture module captures the fingerprint image . The upper surface and the lower surface of the lens are flat. The lens defines at least a first zone and a second zone. The filter is placed under the lens. The filter is in correspondence of the first zone of the lens to reflect a first fingerprint image corresponding to the first zone. The first reflector is disposed under the lens. The first reflector is in correspondence of the second zone of the lens to reflect a second fingerprint image corresponding to the second zone. The filter is disposed between the first reflector and the first image capture module. The first fingerprint image corresponding to the first area is reflected by the filter to be captured by the image capture module, and the second fingerprint image 3021780 4 corresponding to the second area is reflected by the first reflector. and then enters through the filter to be captured by the image capture module. As described above, a light path 5 reflected from the first reflector is without limitation to be blocked by the filter by a characteristic of the filter so that the first fingerprint image and the second fingerprint image are captured. by the same image capture module, because there are fewer components that are used to reflect the light path and that the lens is less expensive. Thus, the structure of the fingerprint sensor module is simplified, the cost is lowered and the thickness can reach the requirement of being less than 6.5 mm.
[0004] Thus, the fingerprint sensor module is able to be manufactured in mass production. The present invention therefore relates to a fingerprint sensor module, characterized in that it comprises: a lens, an upper surface and a lower surface of the lens being flat, the lens defining at least a first zone and a second zone; a filter disposed under the lens, the filter 25 being in correspondence of the first zone of the lens for reflecting a first fingerprint image corresponding to the first zone; a first reflector disposed under the lens, the first reflector being in correspondence of the second zone of the lens for reflecting a second fingerprint image corresponding to the second zone; an image capture module for capturing the first fingerprint image corresponding to the first area and reflected by the filter, and the second fingerprint image corresponding to the second area and reflected by the first reflector, the filter being disposed between the first reflector and the first image capture module, the first fingerprint image corresponding to the first area being reflected by the filter to be captured by the image capture module, and the second fingerprint image corresponding to the second area being reflected by the first reflector and then penetrating through the filter to be captured by the image capture module; and at least a first light source for providing the necessary light source at the time the image capture module captures the fingerprint image. According to a particular embodiment, a light path between the first zone and the image capture module defines a first path of light, the first path of light between the filter and the image capture module being reflected by at least one second reflector. According to a particular embodiment, the filter is a polarization beam splitter, the fingerprint sensor module further comprises a polarization rotation device and a polarization analyzer, the polarization analyzer is located at the polarization splitter. Before the image capture module, the first light path penetrates through the polarization rotation device.
[0005] According to a particular embodiment, the filter is a polarization beam splitter or a dichroic filter, or a reflection filter of some light rays and allowing some other light rays to pass therethrough. According to a particular embodiment, the image capture module is a zoom lens image capture module 5 or an autofocus image capture module. According to a particular embodiment, the first light source is replaced by at least a second light source and at least a third light source, the second light source irradiates the first light source, and the third light source irradiates the light source. second zone, the colors of the second light source and the third light source being different. According to a particular embodiment, the first light source is replaced by an infrared light source, the infrared light source is disposed below the lower surface of the lens, and the image capture module is an infrared camera. According to a particular embodiment, at least one fourth light source is disposed at a periphery of an apex of the lens. According to a particular embodiment, at least one near-infrared light source is disposed under the lower surface of the lens.
[0006] According to a particular embodiment, the first light source is disposed on one side of the lens, the first light source radiates the lens from the side of the light lens.
[0007] According to image area a particular embodiment, the first fingerprint corresponding to the first and the second fingerprint image adjacent to the first source corresponding to the second area captured by the image capture module will generate the same characteristic areas. The present invention will be better understood by those skilled in the art by reading the following description with reference to the accompanying drawings, in which: Fig. 1 is a side sectional view of a fingerprint sensor module according to a first embodiment of the present invention; Figure 2 is a vertical view of a lens of the fingerprint sensor module according to the present invention, wherein a first zone and a second zone of the lens partially overlap; Figure 3 is a schematic diagram of the fingerprint sensor module according to the present invention, in which the light emitted by a light source will be totally reflected in the lens, however the finger touching the lens will destroy the total reflection, and let the light penetrate the lower surface of the lens; Figure 4 is a side sectional view of the fingerprint sensor module according to a second embodiment of the present invention; Figure 5 is a side sectional view of the fingerprint sensor module according to a third embodiment of the present invention; Figure 6 is a side sectional view of the fingerprint sensor module according to a fourth embodiment of the present invention; Fig. 7 is a diagram of a first light path and a second light path of the fingerprint sensor module according to the fourth embodiment of the present invention; Fig. 8 is a diagram of a light path of a noise of the fingerprint sensor module according to the fourth embodiment of the present invention; Fig. 9 is a side sectional view of the fingerprint sensor module according to a fifth embodiment of the present invention; Figure 10 is a side sectional view of the fingerprint sensor module according to a sixth embodiment of the present invention; Fig. 11 is a side sectional view of the fingerprint sensor module according to a seventh embodiment of the present invention; Figure 12 is a side sectional view of the fingerprint sensor module according to an eighth embodiment of the present invention; Fig. 13 is a side sectional view of the fingerprint sensor module according to a ninth embodiment of the present invention; and Fig. 14 is a diagram of the fingerprint sensor module according to the present invention, wherein the light emitted by a light source penetrates through a surface of the lens, and is then reflected by the finger. Referring to FIGS. 1 to 14, an optical fingerprint sensor module 100 according to the present invention is shown. The fingerprint sensor module 100 is adapted to be assembled to an electronic module (not shown) to form a fingerprint image. The fingerprint sensor module 3021780 9 includes an image capture module 4. The image capture module 4 is designated as the first image capture module 41, the second image capture module 42, third image capture module 43 and fourth image capture module 44. Referring to FIGS. 1 to 3, the fingerprint sensor module 100 according to a first embodiment of the present invention comprises at least a first light source 1, a lens 2, a filter 30, a first reflector 31 and the first image capture module 41. The first light source 1 is disposed on one side of the lens 2, and a light beam of the first light source 1 enters the lens 2 from the side of the lens 2 adjacent to the first light source 1. The filter 30 and the first reflector 31 are arranged under the lens 2. The first module image capture 41 is used to capture a fingerprint image reflected by the filter 30 and the first reflector 31. The lens 2 is made of transparent glass or plastic, and an upper surface and a lower surface of the lens 2 are planar. Referring to Figure 1, the first light source 1 irradiates the lens 2 from the side of the lens 2 adjacent to the first light source 1.
[0008] After the first light source 1 enters the lens 2, the light from the first light source 1 is totally reflected in the lens 2 according to the total reflection law. When a finger is pressed down on the upper surface of the lens 2, fingerprint peaks 30 destroy the total reflection of the first light source 1 in the lens 2 and generate the fingerprint image. The first image capture module 41 captures a high contrast pattern of the fingerprint image through the first light source 1 radiating the lens 2 from the side of the lens 2 adjacent to the first source of light. 1. Referring to FIG. 1 and FIG. 2, the lens 2 defines at least a first zone 21 and a second zone 22. The filter 30 is in correspondence of the first zone 21 of the lens 2 to reflect a first fingerprint image corresponding to the first area 21, and the first reflector 31 is in correspondence of the second area 22 of the lens 2 to reflect a second fingerprint image corresponding to the second area 22. The first image capture module 41 is used to capture the first fingerprint image corresponding to the first area 21 and reflected by the filter 30, and the second fingerprint image corresponding to the second zone 22 and reflected by the first reflector 31. The first zone 21 and the second zone 22 are used to be pressed down, and the complete fingerprint image is divided into a first fingerprint image corresponding to the first zone 21 and a second fingerprint image corresponding to the second zone 22. When the finger is pressed down on the upper surface of the lens 2, and after the lens 2 receives the irradiation of the first light source 1, the first zone 21 and the second zone 22 of the lens 2 respectively generate the first fingerprint image and the second fingerprint image to be captured by the first image capture module 41. The first fingerprint image and the second fingerprint image captured by the first image capture module 41 are glued together to form the fingerprint image. complete gitale through image processing software. Referring to Figure 1, the first image capture module 41 captures the first fingerprint image corresponding to the first area 21 and the second fingerprint image corresponding to the second area 22 reflected by the filter 30 and the first reflector 31. The filter 30 is disposed between the first reflector 31 and the first image capture module 41.
[0009] The first fingerprint image corresponding to the first area 21 is reflected by the filter 30 to be captured by the first image capture module 41, and the second fingerprint image corresponding to the second area 22 is reflected. by the first reflector 31 and then enters through the filter 30 to be captured by the first image capture module 41. Referring to Figure 1 and Figure 2, to increase an identification of the image capture software image processing for the first fingerprint image and the second fingerprint image, the first area 21 and the second area 22 of the lens 2 overlap partially so that the first fingerprint image corresponding to the first zone 21 and the second fingerprint image corresponding to the second zone 22 are partially the same. Thus, the first fingerprint image corresponding to the first zone 21 and the second fingerprint image corresponding to the second zone 22 have the same image sections. The first fingerprint image 30 corresponding to the first zone 21 and the second fingerprint image corresponding to the second zone 22 captured by the first image capture module 41 have the same image sections so that the first fingerprint image and the second fingerprint image are glued together to form the complete fingerprint image by the image processing software identifying the same image sections of the first image fingerprint and the second fingerprint image. Referring to FIG. 1 and FIG. 3, the image generated by the first light source 1 totally reflected in the lens 2 is different from the image with black lines generated by a general prism by the peaks. Fingerprint absorbing the light of the first light source 1. When the light of the first light source 1 is totally reflected in the lens 2, the fully reflected light of the first light source 1 has no means of penetrate through the lower surface of the lens 2. Thus the first image capture module 41 will never receive the first light source 1 as long as the fingerprint peaks are pressed down on the upper surface of the lens. lens 2. The fingerprint peaks destroy the total reflection to cause the light of the first light source 1 to be scattered and penetrate through the lower surface of the lens. The first image pickup module 41 never receives light from the first light source 1 without a portion of the lens 1 to be received by the first image pickup module 41. 2 is pressed, and the first image capture module 41 receives light from the first light source 1 when a portion of the lens 2 is pressed to form the bright fingerprint image to obtain the image function. improvement of the image contrast.
[0010] The first light source 1 of the fingerprint sensor module 100 is not limited to being disposed on the side of the lens 2. The first light source 1 is used to provide the necessary illumination at the moment. where the first image capture module 41 captures the fingerprint image. The position of the first light source 1 is arranged so that the fingerprint has enough light to enter the first image capture module 41.
[0011] Referring to Figure 1 and Figure 2 again, a length of the light path between the first zone 21 and the first image capture module 41 is different from a length of a light path. between the second zone 22 and the first image capture module 41. The light path between the first zone 21 and the first image capture module 41 defines a first light path 101. The path of light between the second zone 22 and the first image capture module 41 defines a second light path 102. The first light path 101 is shorter than the second light path 102. The first fingerprint image corresponding to the first light path 102 zone 21 and the second fingerprint image corresponding to the second zone 22 captured by the first image capture module 41 have different sizes. The first light path 101 and the second light path 102 overlap, so that the first fingerprint image corresponding to the first area 21 and the second fingerprint image corresponding to the second area 22 overlap. Referring to FIGS. 1 to 3, in order to solve the problems in which the first fingerprint image and the second fingerprint image overlap, in the first embodiment, the first capture module of FIG. image 41 is a zoom lens image capture module or an autofocus image capture module. Thus, when the first image capture module 41 is adjusted to a focal length of the first light path 101, the first fingerprint image corresponding to the first area 21 is formed sharply and the second fingerprint image corresponding to the second zone 22 is loosely formed. When the first image capture module 41 is adjusted to a focal length of the second light path 102, the second fingerprint image corresponding to the second zone 22 is formed clearly and the first fingerprint image 15 corresponding to the first zone 21 is vaguely formed. Thus the first image capture module 41 captures the first net fingerprint image corresponding to the first area 21 and the second net fingerprint image corresponding to the second area 22 through the image processing software. Then the complete fingerprint image is formed by the image processing software zooming on and gluing together the first fingerprint image corresponding to the first area 21 and the second fingerprint image 25 corresponding to the second area. zone 22 to accomplish a fingerprint identification. Referring to Figures 1 to 3, in the first embodiment, the filter 30 is a polarized spectral filter or a dichroic filter, or a reflection filter 30 of certain light rays and passing some other light rays through it. in order for the filter to perform the reflection function of certain specific light rays and the passage of certain other specific light rays therethrough. Preferably, the first light source 1 is the white light source. Referring to Figure 4, the fingerprint sensor module 100 according to a second embodiment of the present invention is shown. A structure of the fingerprint sensor module 100 according to the second embodiment is almost the same as that of the fingerprint sensor module 100 according to the first embodiment. The differences between the fingerprint sensor module 100 according to the first embodiment and the fingerprint sensor module 100 according to the second embodiment are described as follows. The digital fingerprint sensor module 100 according to the second embodiment further comprises the second image capture module 42. The first light source 1 is the white light source, or the first light source 1 comprises compositions that are capable of being reflected by the dichroic filter and penetrating through the dichroic filter. The filter 30 is the dichroic filter. A depth of field length of the second image capture module 42 includes a length difference between the first light path 101 and the second light path 102, and the second image capture module 42 has no need zoom function. Referring to Figure 4 again, specifically, when the first light source 1 is a white light source, the filter 30 has the reflection function of green light and blue light penetrating therethrough. The first light path 101 strikes the filter 30 and reflects the green light, and the blue light of the second light path 102 penetrates through the filter 30. Thus, the first fingerprint image and the second image of fingerprint captured by the second image capture module 42 will appear respectively green and blue to zoom in and glue together the first fingerprint image and the second fingerprint image using the image processing software identifying the colors of the first fingerprint image and the second fingerprint image and separating the first fingerprint image from the second fingerprint image that overlap. Referring to Figure 1 and Figure 5, the fingerprint sensor module 100 according to a third embodiment of the present invention is shown. A structure of the fingerprint sensor module 100 according to the third embodiment is almost the same as that of the fingerprint sensor module 100 according to the first embodiment. Differences between the fingerprint sensor module 100 according to the first embodiment and the fingerprint sensor module 100 according to the third embodiment are described as follows. The fingerprint sensor module 100 according to the third embodiment further comprises the third image capture module 43. The third image capture module 43 does not need a zoom function, and the depth of field length of the third image capture module 43 is shorter than that of the first image capture module 41, and the first light path 101 between the filter 30 and the third image capture module 43 is reflected by at least one second reflector 32. A length of the first light path 101 is greater due to the fact that the first light path 101 is reflected by the second reflector 32, and the length of the first light path 101 is adjusted to be the same as that of the second light path 102 so that the sizes of the first fingerprint image and the second fingerprint image captured by the third image capture module 43 be the same. Referring to FIG. 5 again, in the third embodiment, the lengths of the first light path 101 and the second light path 102 are the same, thus the depth of field of the third capture module of FIG. image 43 is shorter to be beneficial for choosing the third image capture module 43 with a smaller volume.
[0012] Referring to FIG. 5, the first fingerprint image and the second fingerprint image captured by the third image capture module 43 will never overlap through the second reflector 32, so the first image The fingerprint 20 and the second fingerprint image captured by the third image capture module 43 are glued together by the image processing software to form the complete fingerprint image. Referring to Figure 5 again, the reason why the first fingerprint image and the second fingerprint image captured by the third image capture module 43 never overlap is that the incident angle of the first light path 101 is different from that of the second light path 102. Referring to Fig. 5, the first light path 101 is reflected twice by the two second reflectors 32 to be beneficial to control the light path 3021780 18 thereof to make the position of the third image capture module 43 more flexible. The third image capture module 43 is located within a height of a occupied space of the filter 30 and the first reflector 31 to make the fingerprint sensor module 100 thinner. Referring to Figure 1, Figure 4 and Figure 5, in comparison with the first image capture module 41, the second image capture module 42 and the third image capture module 43 the first image capture module 41 captures the first fingerprint image and the second fingerprint image respectively corresponding to the first light path 101 and the second light path 102 through the use of the zooming means. or auto focus. The depth of field of the second image capture module 42 is wider and covers the length difference between the first light path 101 and the second light path 102. In the third embodiment, due to the fact that the length of the first light path 101 is the same as that of the second light path 102, an extent of the depth of field of the third image capture module 43 is shorter than that of the second image capture module 42 .
[0013] No zoom function is also required. The volume of the third image capture module 43 is smaller than that of the second image capture module 42. Referring to Fig. 6, the fingerprint sensor module 100 according to a fourth embodiment of the present invention is shown. A structure of the fingerprint sensor module 100 according to the fourth embodiment is almost the same as that of the fingerprint sensor module 100 according to the third embodiment. Differences between the fingerprint sensor module 100 according to the third embodiment and the fingerprint sensor module 100 according to the fourth embodiment are described as follows. The filter 30 is the polarization beam splitter. The fingerprint sensor module 100 according to the fourth embodiment further comprises a polarization turning device 33 and an additional polarizing filter 34.
[0014] This additional polarization filter 34 is generally referred to as an analyzer 34. The first light path 101 between the filter 30 and the third image capture module 43 penetrates through the polarization turning device 33 to modify polarized directions. . The polarization rotation device 33 is attached to one of the second reflectors 32. The analyzer 34 is located at the front of the third image capture module 43. The first light source 1 should have the components of S wave and P wave.
[0015] Referring to Figure 6 again, the filter 30 has the S-wave and P-wave reflection function penetrating therethrough. The analyzer 34 has the function of absorbing the S-wave and the P-wave penetrating therethrough or reflecting the S-wave and the P-wave penetrating therethrough. All the light rays received by the third image capture module 43 penetrate through the analyzer 34. The wave components S of the first light path 101 will be reflected by the filter 30, and the P wave components 30 second light path 102 will penetrate through the filter 30. The second light path 102 is capable of penetrating through the analyzer 34. After the first light path 101 enters through the polarization turning device 33, the wave S is modified in the P wave in order to be able to penetrate through the analyzer 34. Thus, the first fingerprint image and the second fingerprint image are captured by the third capture module The first fingerprint image and the second fingerprint image are glued together to form the complete fingerprint image using the image processing software.
[0016] Referring to Figure 7 and Figure 8, the first light path 101 and the second light path 102 will enter through the analyzer 34 into the P waveform to enter the third capture module. Fig. 43, but in addition to the fact that the first light path 101 and the second light path 102 are entering the third image capture module 43, in addition, a portion of reflected light by the filter 30 is directly reflected to the third image capture module 43 without passing through the second reflector 32 due to the reflection angle relationship to shorten the first light path 101 to generate a noise. Before the noise arrives at the third image capture module 43, the noise is the S wave (concentric circle pattern), so the noise is filtered, and another image light source is reflected by the first reflector 31 to the second reflector 32 without being captured by the third image capture module 43 to extend the second light path 102 to generate the noise. The second light path 102 represents the P wave at the time of crossing the filter 30, and is changed to the S wave after crossing the polarization rotation device 33, so the second light path 102 is filtered. Thus, it is possible to prevent interference from noise image light sources to improve imaging quality by the polarized spectral principle and the polarization direction principle.
[0017] Referring to Figure 1 and Figure 9, the fingerprint sensor module 100 according to a fifth embodiment of the present invention is shown. A structure of the fingerprint sensor module 100 according to the fifth embodiment is almost the same as that of the fingerprint sensor module 100 according to the first embodiment. Differences between the fingerprint sensor module 100 according to the first embodiment and the fingerprint sensor module 100 according to the fifth embodiment are described as follows. The first light source 1 is replaced by at least a second light source 12 and at least a third light source 13. The second light source 12 irradiates the first area 21, and the third light source 13 irradiates the second area. zone 22. The colors of the second light source 12 and the third light source 13 are different. In the fifth embodiment, the second image capture module 42 captures the first and second fingerprint images with different colors. Referring to Figure 9, the filter 30 is the polarization beam splitter or the dichroic filter, or a reflection filter of certain light rays and some other light rays passing therethrough. It should be noted that the second light source 12 should contain the composition that is capable of being reflected by the dichroic filter, and that the third light source 13 should contain the composition that is capable of penetrating through the filter. dichroic. Referring to Figure 9 again, specifically, the second light source 12 and the third light source 13 are green light and blue light. The filter 30 has the function of reflecting a certain light with the certain intensity and passing others through it. Thus, the first fingerprint image and the second fingerprint image captured by the second image capture module 42 will respectively represent green and blue to accelerate a gluing processing speed using the image processing software. image identifying the colors of the first fingerprint image and the second fingerprint image. The image processing software is capable of separating the first fingerprint image from the second fingerprint image according to the colors and gluing together the first fingerprint fingerprint image for complete digitals. Referring digitally and the second image obtaining the fingerprint image in Figure 10, the fingerprint sensor module 100 according to the sixth embodiment of the present invention is shown. A structure of the fingerprint sensor module 100 according to the sixth embodiment is the same as that of the fingerprint sensor module 100 according to the fifth embodiment. The differences between the fingerprint sensor module 100 according to the fifth embodiment and the fingerprint sensor module 100 according to the sixth embodiment are described as follows. The image capture module 4 is the third image capture module 43. The first light path 101 between the filter 30 and the third image capture module 43 is reflected by the second reflector 32 so that the size of the first fingerprint image captured by the third image capture module 43 is the same as that of the second fingerprint image captured by the third image capture module 43. The second source 12 and the third light source 13 respectively cause the third image capture module 43 to capture the first and second fingerprint images with the different colors. Referring to Figure 10, the third image capture module 43 captures the first fingerprint image and the second fingerprint image with the different colors. The first fingerprint image and the second fingerprint image captured by the third image capture module 43 will never overlap. Thus, the first fingerprint image and the second fingerprint image captured by the third image capture module 43 are pasted together by the image processing software to form the complete fingerprint image. . By forming the first and second fingerprint images with the different colors, a generation of the noise image can be prevented. Referring to Figure 11, the fingerprint sensor module 100 according to a seventh embodiment of the present invention is shown. In order to increase a living character detection capability of the fingerprint sensor module 100, a structure of the fingerprint sensor module 100 according to the seventh embodiment is one of the structures of the sensor module. Fingerprint 100 3021780 24 according to the first to sixth embodiments. At least one fourth light source 14 is disposed at a periphery of an apex of the lens 2. The fourth light source 14 irradiates the finger to be provided for the third image capture module 43 to record a scene video. . Due to the fact that the intensity of the reflected light source will be changed at the time of blood flow in the finger, the third image capture module 43 obtains a photoplethysmograph signal variation to identify vital signs. Thus, in the current structure, the living character detection capability of the fingerprint sensor module 100 according to the seventh embodiment is realized by the fourth light source 14 to enhance the living character detection capability of the module. fingerprint sensor 100 according to the seventh embodiment. Referring to Figure 12 and Figure 14, the fingerprint sensor module 100 according to an eighth embodiment of the present invention is shown. In order to increase the living character detection capacity of the fingerprint sensor module 100 according to the eighth embodiment, a structure of the fingerprint sensor module 100 according to the eighth embodiment is one of the structures of the fingerprint sensor modules 100 according to the first to sixth embodiments. At least one near-infrared light source 15 is disposed below the lower surface of the lens 2 to cause the blood of the finger veins to reflect the near-infrared light source 15 with the 800850 nm wavebands, the Near-infrared light source 15 irradiates the finger veins for the third image capture module 43 to record the scene video in order to observe blood changes of the finger veins to recognize the vital signs, thus in the In the current embodiment of the fingerprint sensor module 100 according to the eighth embodiment, the vein image identification function can be performed by adjusting the near infrared light source 15 to improve the identification capability. of the fingerprint sensor module 100 according to the eighth embodiment. Referring to Figure 13 and Figure 14, the fingerprint sensor module 100 according to the ninth embodiment of the present invention is shown. A structure of the fingerprint sensor module 100 according to the ninth embodiment is almost the same as that of the fingerprint sensor module 100 according to the fourth embodiment. The fingerprint sensor module 100 according to the ninth embodiment comprises at least one infrared light source 16 and the fourth image capture module 44. The first light source 1 is replaced by the infrared light source 16. The infrared light source 16 is disposed below the lower surface of the lens 2. The fourth image capture module 44 is an infrared camera. After the infrared light source 16 enters the lens 2, the infrared light source 16 is fully reflected and penetrates through the upper surface of the lens 2 to irradiate the finger to cause the lower surface of the lens 2 to be generated. the fingerprint image. A finger image pattern, the fingerprint pattern, and an internal tissue pattern of the finger are captureable by the fourth image capture module 44 according to the ninth embodiment of the present invention. Referring to Fig. 13 and Fig. 14, after the infrared light source 16 irradiates the lens 2, the infrared light source 16 is partially totally reflected, and partially penetrates through the upper surface of the lens 2 to irradiate the finger. When the finger is pressed down on the upper surface of the lens 2, the fourth image capture module 44, in addition to capturing the image of the infrared light source 16 reflected by the fingerprint peaks of origin, also captures the image of the infrared light source 16 irradiating the finger, so that the fourth image capture module 44 is used to form the image of the internal tissues of the finger, such as blood vessels, so a complete view of the finger is apt to be observed. Referring to FIGS. 1 to 14, in comparison with the prior art, the components pressed by the fingerprint are the lens 2 instead of the prism, the prism in the prior art needs to be provided with a refractive surface for refracting the light source to cause the light source in the prism refracted by the refraction surface to emerge from a prism base body, a size of the refraction surface is limited by the size of the image, a height of the refraction surface is limited by a refraction angle, so that the refractive surface limits a base height of the prism, the lens 2 just has the upper surface and the flat bottom surface, so the thickness of the lens 2 can be designed thinner by the aforementioned structure. Referring to FIGS. 1 to 14, the fingerprint image 100 according to the present invention selects the first reflector 31 and the second reflector 32 respectively corresponding to a portion of the lower surface of the lens 2 to replace the prism in the prior art. The prior art prism needs to form the complete fingerprint image such that a prism size in the prior art is limited, due to the fact that the former Reflector 31 and the second reflector 32 need respectively to form the first fingerprint image and the second fingerprint image, the sizes of the first reflector 31 and the second reflector 32 can be reduced. If the prism in the prior art is larger, it makes a height of the fingerprint sensor module 100 higher. Thus, in comparison with the prism in the prior art, heights of the first reflector 31 and the second reflector 32 are lower than that of the prism in the prior state of the art. Referring to FIGS. 1 to 14, a light path reflected from the first reflector 31 is without limitation to be blocked by the filter 30 by a characteristic of the filter 30 in order to bring the first fingerprint image corresponding to the first zone 21 and the second fingerprint image 30 corresponding to the second zone 22 to be captured by the same image capture module 4, due to the fact that components that are used to reflect the light path are fewer and the lens 2 is less expensive, so that the structure of the fingerprint sensor module 100 is simplified and the cost of the fingerprint sensor module 100 is lowered. Referring to FIGS. 1 to 14, the degree of identification of the fingerprint sensor module 100 is higher, and the thickness of the fingerprint sensor module 100 indeed has a requirement of being lower at 6.5 mm by the aforementioned structure, so the fingerprint sensor module 100 is suitable for application in a thinner type electronic product. As described above, the reflected light path of the first reflector 31 is without limitation to be blocked by the filter 30 by the characteristic of the filter 30 to bring the first fingerprint image and the second image of fingerprint to be captured by the same image capture module 4, due to the fact that the components that are used to reflect the light path are less numerous and that the lens 2 is less expensive, so that the The structure of the fingerprint sensor module 100 is simplified so that the cost of the fingerprint sensor module 100 is lowered and the thickness of the fingerprint sensor module 100 indeed reaches the requirement. to be less than 6.5 mm. Thus, the fingerprint sensor module 100 is able to be manufactured in mass production. The foregoing description of the present invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and of course several modifications and variations are possible in view of the teaching above. Such modifications and variations as may be apparent to those skilled in the art are intended to be included within the scope of the invention.

权利要求:
Claims (10)
[0001]
CLAIMS1 - Fingerprint sensor module (100), characterized in that it comprises: a lens (2), an upper surface and a lower surface of the lens (2) being flat, the lens (2) defining at least a first zone (21) and a second zone (22); a filter (30) disposed under the lens (2), the filter (30) being in correspondence of the first zone (21) of the lens (2) for reflecting a first fingerprint image corresponding to the first zone (21); ); a first reflector (31) disposed under the lens (2), the first reflector (31) being in correspondence with the second zone (22) of the lens (2) for reflecting a second fingerprint image corresponding to the second zone (22); an image capture module (4) for capturing the first fingerprint image corresponding to the first region (21) and reflected by the filter (30), and the second fingerprint image corresponding to the second area ( 22) and reflected by the first reflector (31), the filter (30) being arranged between the first reflector (31) and the first image capture module (4), the first fingerprint image corresponding to the first zone (21) being reflected by the filter (30) to be captured by the image capture module (4), and the second fingerprint image corresponding to the second region (22) being reflected by the first reflector (31). ) and then penetrating through the filter (30) to be captured by the image capture module (4); and 3021780 31 at least a first light source (1) for providing the necessary light source at the moment the image capture module (4) captures the fingerprint image. 5
[0002]
2 - fingerprint sensor module (100) according to claim 1, characterized in that a light path between the first zone (21) and the image capture module (4) defines a first path of light (101), the first light path (101) between the filter (30) and the image capture module (4) being reflected by at least one second reflector (32).
[0003]
3 - fingerprint sensor module (100) according to claim 2, characterized in that the filter (30) is a polarization beam splitter, the fingerprint sensor module (100) further comprises a polarization rotation device (33) and a polarization analyzer (34), the polarization analyzer (34) is located at the front of the image capture module (4), the first light path (101) ) penetrates through the polarization rotation device (33).
[0004]
4 - fingerprint sensor module (100) according to claim 1, characterized in that the filter (30) is a polarization beam splitter or a dichroic filter, or a reflection filter of certain light rays and letting some other light rays through this one.
[0005]
5 - fingerprint sensor module (100) according to claim 1, characterized in that the image capture module (4) is a zoom lens image capture module or a capture module. autofocus image.
[0006]
6 - fingerprint sensor module (100) according to claim 1, characterized in that the 3021780 32 first light source (1) is replaced by at least a second light source (12) and at least a third light source (13), the second light source (12) irradiates the first zone (21), and the third light source (13) irradiates the second zone (22), the colors of the second light source ( 12) and the third light source (13) being different.
[0007]
7 - fingerprint sensor module (100) according to claim 1, characterized in that the first light source (1) is replaced by an infrared light source (16), the infrared light source (16) ) is disposed below the lower surface of the lens (2), and the image capturing module (4) is an infrared camera (42). 15
[0008]
8 - fingerprint sensor module (100) according to claim 1, characterized in that at least a fourth light source (14) is disposed at a periphery of a vertex of the lens (2).
[0009]
9 - fingerprint sensor module (100) 20 according to claim 1, characterized in that at least one near-infrared light source (15) is disposed under the lower surface of the lens (2).
[0010]
10 - Fingerprint sensor module (100) according to claim 1, characterized in that the first light source (1) is arranged on one side of the lens (2), the first light source (1) ) irradiates the lens (2) from the side of the lens (2) adjacent to the first light source (1). 30

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同族专利:

公开号 | 公开日

JP2015228199A|2015-12-17|

TWI534717B|2016-05-21|

JP5873905B2|2016-03-01|

US9177190B1|2015-11-03|

GB2526635A|2015-12-02|

GB201414856D0|2014-10-08|

DE102014112746A1|2015-12-03|

TW201545073A|2015-12-01|

GB2526635B|2016-07-13|

DE102014112746B4|2018-01-25|

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法律状态:
2015-06-30| PLFP| Fee payment|Year of fee payment: 2 |

2016-06-28| PLFP| Fee payment|Year of fee payment: 3 |

2018-06-29| ST| Notification of lapse|Effective date: 20180531 |

优先权:

申请号 | 申请日 | 专利标题

TW103119160|2014-05-30|

TW103125010A|TWI534717B|2014-05-30|2014-07-21|Fingerprint sensor|

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