Optical recognition device

Abstract

An optical identification device includes an array lens assembly, an optical filter, and a sensor component. The array lens assembly includes an optical lens assembly. Each optical lens assembly includes at least two lenses. The optical filter is located on one side of the array lens assembly. The sensor component is located on a side of the optical filter away from the array lens assembly. The sensor component is optically coupled to the optical lens assembly via the optical filter. This arrangement effectively expands the signal reception area of the optical identification device while simultaneously obtaining a clear optical signal.

Description

Technical Field

[0001] The present disclosure relates to an optical recognition device. Background Art

[0002] Fingerprint recognition systems currently used on touchscreen electronic devices (such as mobile phones and tablets) primarily rely on the reflection of light from the screen by the fingerprint to an optical recognition system installed within the device, which then converts the light into an electrical signal for identification, thereby protecting personal information. However, due to the physical structure of existing optical recognition systems, fingerprint recognition can only be performed on a specific area of the screen. The ability to implement fingerprint recognition across a large area (e.g., the entire screen of an electronic device) remains difficult to achieve at low manufacturing costs.

[0003] Therefore, how to propose an optical recognition device that can solve the above problems is one of the issues that the industry is eager to invest research and development resources to solve. Summary of the Invention

[0004] In view of this, one objective of the present disclosure is to provide an optical recognition device that can effectively solve the above-mentioned problems.

[0005] This disclosure relates to an optical recognition device comprising an array lens assembly, an optical filter, and a sensor component. The array lens assembly includes an optical lens assembly. Each optical lens assembly includes at least two lenses. The optical filter is located on one side of the array lens assembly. The sensor component is located on a side of the optical filter away from the array lens assembly. The sensor component is optically coupled to the optical lens assembly via the optical filter.

[0006] In some current embodiments, the sensing component has an image sensing area, and the optical axis of one of the optical lens assemblies is parallel to a central axis perpendicular to the image sensing area.

[0007] In some current embodiments, each optical lens assembly includes at least one aspherical lens.

[0008] In some current embodiments, the optical lens assembly further includes another optical lens assembly arranged beside the central axis, wherein at least two lenses of the other optical lens assembly have curvature and include at least one aspherical lens or a free-form surface.

[0009] In some current embodiments, the other optical lens assembly further includes a reflective mirror located on a side of the other optical lens assembly adjacent to the sensing component.

[0010] In some current embodiments, the other optical lens assembly further includes a collimating lens located on a side of the other optical lens assembly adjacent to the sensing component and between the at least two lenses and the reflective mirror.

[0011] In some current embodiments, the optical lens set is arranged in a rectangular array, and each lens of the optical lens set has a rectangular outer edge.

[0012] In some current embodiments, the optical recognition device further includes a vignetting stop disposed on one side of the array lens assembly. The vignetting stop corresponds to one of the optical lens assembly and is a rectangular opening.

[0013] In some current embodiments, the optical lens set is arranged in a hexagonal array, and each lens of the optical lens set has a hexagonal outer edge.

[0014] In some current embodiments, the optical recognition device further includes a vignetting stop disposed on one side of the array lens assembly. The vignetting stop corresponds to one of the optical lens assembly and is a hexagonal opening.

[0015] In some current implementations, the optical lens groups in the array lens group are randomly arranged.

[0016] In summary, the optical recognition device disclosed herein utilizes array lens assemblies arranged in various configurations (e.g., rectangular, hexagonal, combined, and random) to provide different optical signal reception areas. Furthermore, the array lens assembly, comprised of multiple optical lens assemblies, also provides an expanded optical signal reception area. Furthermore, by varying the outer edge shape of the optical lens assemblies and using a vignetting stop, the optical signal imaging area can be further controlled, allowing a single sensor element to accurately capture and assemble multiple optical lens assemblies. Furthermore, through the synergistic effect of the aforementioned optical lens assemblies and vignetting stops, the optical recognition device can obtain accurate and clear optical signals using only one sensor element corresponding to multiple optical lens assemblies. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The aspects of the present disclosure are best understood from the following detailed description when read in conjunction with the accompanying drawings. It should be noted that, in accordance with standard industry practice, various features are not drawn to scale. In fact, the dimensions of various features may be arbitrarily increased or decreased for clarity of discussion.

[0018] Figure 1 FIG. 1 is a side view of an optical recognition device according to some embodiments of the present disclosure.

[0019] Figure 2 FIG2 is a diagram illustrating an imaging field of view of an optical recognition device according to some embodiments of the present disclosure.

[0020] Figure 3A FIG. 1 is a front view of an optical recognition device according to some embodiments of the present disclosure.

[0021] Figure 3B FIG2 is a front view of an optical recognition device according to some other embodiments of the present disclosure.

[0022] Figure 4A 1 is a schematic side view of an optical recognition device according to some other embodiments of the present disclosure.

[0023] Figure 4B 1 is a side view of an optical recognition device according to some other embodiments of the present disclosure.

[0024] Figure 5 FIG2 is a diagram illustrating usage scenarios of an optical recognition device according to some embodiments of the present disclosure.

[0025] Reference numerals:

[0026] 100: Optical recognition device

[0027] 110: Array lens group

[0028] 112,114,116,412,414,416,418,512,513,514,515,516,517,518: Optical lens set

[0029] 112a, 112b, 114a, 114b, 116a, 116b: Lenses

[0030] 114c, 116c: Reflector

[0031] 114d,116d: Collimating lens

[0032] 120: Optical filter

[0033] 130,320: Sensing components

[0034] 140: Lens barrel

[0035] 150: Vignetting stop

[0036] 200: Display screen

[0037] 310: Imaging circle

[0038] 152,154,156,412a,414a,416a,418a,512a,513a,514a,515a,516a,517a,518a: opening

[0039] A:Axis DETAILED DESCRIPTION

[0040] The following disclosure provides many different embodiments or examples of different features for implementing the provided objectives. Specific examples of components and arrangements are described below to simplify the disclosure. Of course, these are merely examples and are not intended to be limiting. For example, in the following description, a first feature formed on or on a second feature may include an embodiment in which the first and second features are formed in direct contact, and may also include an embodiment in which an additional feature may be formed between the first and second features so that the first and second features may not be in direct contact. In addition, the disclosure may repeat component symbols and / or letters in various examples. This repetition is for simplicity and clarity purposes and does not, by itself, represent a relationship between the various embodiments and / or configurations discussed.

[0041] Additionally, for simplicity of description, spatially relative terms such as "below," "beneath," "lower," "above," "upper," and the like may be used herein to describe the relationship of one component or feature to another (further) component or feature as illustrated in the figures. These spatially relative terms are intended to encompass different orientations of the component in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0042] As used herein, "approximately," "about," "approximately," or "substantially" generally means within 20 percent, or within 10 percent, or within 5 percent of a given value or range. Numerical values given herein are approximate, indicating that the use of terms such as "approximately," "about," "approximately," or "substantially" can be inferred when not explicitly stated.

[0043] Figure 1 FIG is a side view of an optical recognition device 100 according to some embodiments of the present disclosure. Figure 1 An optical recognition device 100 includes an array lens assembly 110, an optical filter 120, and a sensor component 130. The array lens assembly 110 includes optical lens groups 112, 114, and 116. Each of the optical lens groups 112, 114, and 116 includes at least two lenses 112a, 112b, 114a, 114b, 116a, and 116b. The optical filter 120 is located on one side of the array lens assembly 110. The sensor component 130 is located on a side of the optical filter 120 away from the array lens assembly 110. The sensor component 130 is optically coupled to the optical lens groups 112, 114, and 116 via the optical filter 120.

[0044] This optical recognition device 100 can be set on the display screen 200 and receive light signals located in a specific area in front of the optical recognition device 100. The light signals are then received and transmitted to the sensing component 130 through the array lens group 110. In some embodiments, the optical recognition device 100 further includes a lens barrel 140. The lens barrel 140 houses and fixes the array lens group 110, the optical filter 120, and the sensing component 130. Specifically, the lens barrel 140 can be an independent structure or a part of another housing. For example, if the optical recognition device 100 is installed in a housing, the portion of the housing that encloses the optical recognition device 100 can be considered the lens barrel 140 of the optical recognition device 100.

[0045] Figure 1 In the illustrated embodiment, the array lens assembly 110 includes three optical lens groups 112, 114, and 116. However, in practice, the array lens assembly 110 may include any number of optical lens groups. In some embodiments, the array lens assembly 110 has a radially symmetrical structure. Its axis of symmetry can be generally defined by the central axis A of the image sensing area of the sensor element 130, but the present disclosure is not limited thereto. Figure 1 The illustrated array lens assembly 110 is a simplified version. For clarity and ease of illustration, the optical lenses in the upper half of the optical lens assembly 112 are omitted. However, in other embodiments, the optical lenses of the array lens assembly 110 can be combined in other ways as needed. Each optical lens assembly has an independent optical axis.

[0046] The optical axis is an imaginary line that defines the path of light transmitted by the optical system. After passing through the optical axis, the light will propagate along the optical axis. By calculating the optical axis of each optical lens group (for example, optical lens groups 112, 114, 116), the multiple optical lens groups 112, 114, 116 can be further arranged in appropriate positions in the array lens group 110 so that the light signal received by each optical lens group 112, 114, 116 can be faithfully transmitted to the sensing component 130. For example, in some embodiments, the sensing component 130 has an image sensing area, and the optical axis of one of the optical lens groups 112, 114, 116 is parallel to the central axis A perpendicular to the image sensing area. Specifically, in Figure 1 In the illustrated embodiment, the optical axis of the optical lens assembly 112 coincides with the central axis A of the image sensing area (thus, the optical lens assembly 112 may also be referred to as a coaxial optical lens assembly 112). However, the present disclosure is not limited thereto. The above description provides only one arrangement of the optical lens assemblies 112, 114, and 116 in the array lens assembly 110. However, other suitable arrangements may also be used.

[0047] The calculation of the optical axis is also related to the shapes and positions of the lenses 112a, 112b, 114a, 114b, 116a, 116b included in the optical lens assembly 112, 114, 116. Figure 1 The two lenses 112a and 112b included in the optical lens group 112 have rotational symmetry, that is, when the relative position between the lenses 112a and 112b remains unchanged and the lenses 112a and 112b are rotated separately with the lens center axis as the rotation axis, the optical axis of the optical lens group 112 will not change. However, for other optical lens groups that do not have rotational symmetry, the calculation of the optical axis will be relatively more complicated. In addition to the symmetry of the lenses (for example, lenses 112a and 112b) affecting the position of the optical axis, the curvature of the lens surface will also change the light path. In some embodiments, the optical lens group 112 includes an aspherical mirror. Specifically, referring to Figure 1 The illustrated optical lens assembly 112 comprises lenses 112a and 112b comprised of aspherical lenses. Aspherical lenses offer better aberration correction than spherical lenses, thus providing a more ideal optical signal. However, the lenses comprising the optical lens assembly 112 are not limited to aspherical lenses. Various suitable lenses, such as free-form surfaces, may also be used in conjunction with other lenses within the optical lens assembly 112 to achieve optimal imaging effects.

[0048] On the other hand, Figure 1As can be seen, the optical axes of optical lens assemblies 114 and 116 do not coincide with the central axis A of the image sensing area (thus, optical lens assemblies 114 and 116 can also be referred to as non-coaxial optical lens assemblies 114 and 116). Compared to optical lens assembly 112, which corresponds to the central region of the image sensing area, the regions corresponding to optical lens assemblies 114 and 116 are located at the periphery of the image sensing area. Therefore, the lenses 114a, 114b, 116a, and 116b used in optical lens assemblies 114 and 116 must prioritize reducing aberrations in the peripheral regions to maintain optical signal fidelity. One solution is to use lenses with specific shapes to reduce imaging aberrations. For example, in some embodiments, optical lens assembly 112 further includes another optical lens assembly 114 (or optical lens assembly 116) arranged adjacent to central axis A. At least two of the lenses 114a and 114b of the other optical lens assembly 114 have curved surfaces, each with two regions having two curvatures. Specifically, the lenses 114a, 114b, 116a, and 116b included in the optical lens assemblies 114 and 116 are multi-curved lenses that can have different curvatures in different areas on the same surface. For example, because lens 116a is prone to aberrations or image distortion near the edge of the imaging range, a surface with a first curvature can be designed for the area near the edge of the imaging range to mitigate aberrations or distortion. Furthermore, a surface with a second curvature can be used in the center area of lens 116a (or other areas less prone to aberrations), thereby balancing the imaging range and image quality. However, this is merely an illustration of one possible embodiment, and the present disclosure is not limited to this. It should be noted that the number of different areas on the surface of each lens 114a, 114b, 116a, and 116b is not limited to two, and the different areas and the curvatures set in these areas can be adjusted as needed to achieve the optimal imaging effect. The combination of the optical lens groups 112, 114, and 116 (i.e., the coaxial optical lens group 112 and the non-coaxial optical lens groups 114 and 116) can roughly form a prototype of the array lens group 110. However, the design details of each optical lens group still need to be changed according to the current usage scenario.

[0049] An optical filter 120 is also positioned between the array lens assembly 110 and the sensor assembly 130. Optical filter 120 allows only light of specific wavelengths to pass through, thereby enhancing the optical signals of these wavelengths for further reception by the sensor assembly 130. The purpose of optical filter 120 is to relatively enhance the optical signals of specific wavelengths, thereby optimizing the quality of the optical signals received by the sensor assembly 130. For example, the type of optical filter 120 is not particularly limited; its selection is primarily based on the requirements of the sensor assembly 130 and the wavelength distribution of the received light.

[0050] Figure 2 FIG2 is an imaging field diagram of an optical recognition device 100 according to some embodiments of the present disclosure. Figure 1 as well as Figure 2 , you can see Figure 2 The circular range in the image circle 310 is the image circle 310. Specifically, the range of the image circle 310 varies according to the image range of all optical lens groups 112, 114, and 116 in the array lens group 110. For example, Figure 2 The imaging circle 310 shown corresponds to the array lens group 110 having a circular imaging range. Figure 2 The relationship between the sensor element 320 and the imaging circle 310 is also shown. The sensor element 320 mentioned here is the same as the sensor element 130 mentioned above. The sensor element 320 is rectangular in this embodiment, but the sensor element 320 can also have other different shapes to correspond to the appropriate sensing range. The sensor element 320 can determine the shape of the final image produced, for example, Figure 2 The rectangular sensing element 320 in the image circle will produce a rectangular image. In addition to considering the shape of the sensing area, the settings of the imaging circle 310 and the sensing element 320 also need to be able to cooperate with each other to avoid blind spots in the sensing field of view. Figure 2 The illustrated embodiment illustrates that the area covered by the imaging circle 310 even exceeds the sensing range of the sensor element 320, but the disclosure is not limited thereto. Generally speaking, the received light signal range covered by the imaging circle 310 only needs to completely cover the sensing range of the sensor element 320.

[0051] In addition, in order to change the shape of the aforementioned imaging circle 310, in addition to changing the overall combination range of the array lens group 110, the corresponding optical lens group (for example, Figure 1 A vignetting stop 150 is installed on the optical lens assembly 112, 114, 116 to change the imaging range and further reshape the image circle 310. The above two methods of controlling the shape of the image circle 310 can be used in combination or adjusted separately, and the details will be described below.

[0052] Figure 3A FIG is a front view of an optical recognition device 100 according to some embodiments of the present disclosure. Figure 1 、 Figure 2 as well as Figure 3A , Figure 3A for Figure 1 The front view of the optical recognition device 100 is shown, which illustrates one arrangement method of the array lens group 110. In this embodiment, the optical lens groups 412, 414, 416, 418 are arranged in a rectangular array, and each lens of the optical lens groups 412, 414, 416, 418 has a rectangular outer edge. It should be noted that Figure 3A Since this is a front view, only the outer edge of the frontmost lens in the optical lens group 412, 414, 416, and 418 can be seen. However, in reality, the remaining lenses located behind the illustrated lens also have rectangular outer edges. Figure 1 The optical lens groups 112, 114, and 116 are similar or identical. The number of optical lens groups 412, 414, 416, and 418 arranged in a rectangular manner is not limited to four, and the specific number of optical lens groups used will depend on the needs. Since a rectangular array arrangement is used, the optical lens groups 412, 414, 416, and 418 in the array lens group 110 must also have rectangular outer edges in order to fully cover the light signal receiving range so as to optimize the overall arrangement. However, if there are other requirements, optical lens groups of different shapes can also be used to combine into an imaging circle 310 with a rectangular outer edge. In addition, combined with the arrangement basis mentioned in the previous paragraph that the optical axis coincides with the central axis A perpendicular to the image sensing area. The optical axis of one of the optical lens groups 412, 414, 416, and 418 can be aligned with the central axis A of the sensing component 130 (please refer to Figure 1 ) parallel, but the present disclosure is not limited thereto.

[0053] exist Figure 1 as well as Figure 3A , an embodiment in which a vignetting stop 150 is applied is also shown. Figure 1 In the embodiment of the present invention, the optical recognition device 100 further includes a vignetting stop 150 having openings 152, 154, and 156, respectively, disposed on one side of the array lens assembly 110. Each opening 152, 154, and 156 of the vignetting stop corresponds to one of the optical lens assemblies 112, 114, and 116 (for example, the opening 152 of the vignetting stop corresponds to the optical lens assembly 112). In other words, the openings 152, 154, and 156 of the vignetting stop 150 may correspond to Figure 3A The openings 412a, 414a, 416a, 418a in the vignetting stop are rectangular openings 412a, 414a, 416a, 418a. Specifically, referring to Figure 1 as well as Figure 3A The vignetting stop is disposed on the side of the optical lens group 412, 414, 416, 418 close to the sensor component 130 and has openings 412a, 414a, 416a, 418a respectively. Figure 3A In FIG, the vignetting stop (eg, the vignetting stop with opening 412a) is blocked because it is located behind the optical lens group (eg, the optical lens group 412), and thus the opening position and shape of the vignetting stop are only indicated by dotted lines. Figure 3AThe vignetting stop opening positions are for illustrative purposes only; specifically, their positions can be adjusted based on imaging requirements. The vignetting stop can be a separate, opaque material with openings 412a, 414a, 416a, and 418a, but this is not limiting. In other embodiments, the vignetting stop can also be part of another housing. Furthermore, the vignetting stop does not necessarily come into direct contact with the optical lens assembly 412, 414, 416, and 418 after installation; whether or not they come into direct contact depends on the design of the vignetting stop itself. For example, if the vignetting stop is part of the housing that houses the array lens assembly 110, it may not come into direct contact with the optical lens assembly. However, if the vignetting stop is provided in a manner similar to the frame of the optical lens assembly, it may come into direct contact with the optical lens assembly.

[0054] The vignetting stop having rectangular openings 412a, 414a, 416a, 418a can further limit the range of the light signal received by the optical lens assembly 412, 414, 416, 418 and introduced into the sensor component 130, thereby controlling the imaging circle 310 (e.g., Figure 2 For example, Figure 3A The illustrated vignetting stop has rectangular openings 412a, 414a, 416a, and 418a, so the optical signal outputted by each optical lens assembly 412, 414, 416, and 418 has a rectangular range. In other words, by setting specific shapes for the vignetting stop openings 412a, 414a, 416a, and 418a, the range projected by each optical lens assembly 412, 414, 416, and 418 onto the sensor assembly 130 can be controlled. This has the advantage that, because the optical signal receiving ranges of each optical lens assembly 412, 414, 416, and 418 have overlapping regions, controlling the optical signal receiving ranges of each optical lens assembly 412, 414, 416, and 418 to simple geometric shapes with easily analyzed and processed optical signal overlaps facilitates adjustment or integration of the overall optical signal ultimately received by the sensor assembly 130.

[0055] Figure 3B FIG is a front view of an optical recognition device 100 according to some other embodiments of the present disclosure. Figure 1 、 Figure 2 as well as Figure 3B , Figure 3B for Figure 1The front view of the optical recognition device 100 is shown, which illustrates another arrangement method of the array lens group 110. In this embodiment, the optical lens groups 512, 513, 514, 515, 516, 517, and 518 are arranged in a hexagonal array, and each lens of the optical lens groups 512, 513, 514, 515, 516, 517, and 518 has a hexagonal outer edge. Figure 3A The same is that, due to Figure 3B Since this is a front view, only the outer edge of the frontmost lens in the optical lens group 512, 513, 514, 515, 516, 517, and 518 can be seen. However, in fact, the remaining lenses located behind the illustrated lenses also have hexagonal outer edges. Figure 1 The optical lens groups 112, 114, and 116 are similar or identical to those in FIG. Figure 3A For the same reason as described in the previous paragraph, in order to achieve the optimal arrangement of optical lens groups 512, 513, 514, 515, 516, 517, and 518, the lenses included in each of them also have a hexagonal outer edge. Ultimately, an image circle 310 with a hexagonal outer edge is formed.

[0056] Figure 3B The hexagonal optical lens groups 512, 513, 514, 515, 516, 517, and 518 can also be equipped with vignetting stops (such as Figure 1 The vignetting stop 150 (having openings 512a, 513a, 514a, 515a, 516a, 517a, and 518a) is used to better control the range and shape of the projections of the optical lens groups 512, 513, 514, 515, 516, 517, and 518 onto the sensor element 130. Specifically, in some embodiments, the optical recognition device 100 further includes a vignetting stop disposed on one side of the array lens group 110. The vignetting stop corresponds to one of the optical lens groups 512, 513, 514, 515, 516, 517, and 518 (for example, the opening 512a of the vignetting stop corresponds to the optical lens group 512). The vignetting stop has hexagonal openings 512a, 513a, 514a, 515a, 516a, 517a, and 518a. The vignetting stop with hexagonal openings 512a, 513a, 514a, 515a, 516a, 517a, 518a mentioned here can be used in conjunction with the aforementioned Figure 3AThe vignetting stop with a rectangular opening described in [ 5 ] has a similar or identical structure and is positioned in a similar or identical location. The hexagonal openings 512 a, 513 a, 514 a, 515 a, 516 a, 517 a, 518 a of the vignetting stop can further limit the range of the optical signal derived from each optical lens assembly 512 , 513 , 514 , 515 , 516 , 517 , 518 , thereby controlling the optical signal received by the sensing device.

[0057] In addition, it should be noted that the Figure 3A as well as Figure 3B The two embodiments listed above are not intended to limit the implementation of the present disclosure, and are within the scope of the present disclosure. In addition, in some other embodiments, the optical lens groups in the array lens group 110 are randomly arranged. The optical lens groups can be arranged arbitrarily according to the needs to receive light signals in non-adjacent areas, or they can be applied to some non-adjacent areas that all need to receive light signals. Figures 1 to 3B Any arrangement of the optical lenses in the array lens assembly 110, the shape of the vignetting stop 150, or the configuration of the vignetting stop 150 not described above may be used. Furthermore, the combination to be used depends on the desired reception range of the optical signal. For example, if the area emitting the optical signal is approximately rectangular, such as the shape of an electronic device screen (a mobile phone screen, a touchscreen device screen), combining multiple optical lenses in a rectangular arrangement can capture the optical signal transmitted by the electronic screen without wasting excess optical signal reception range, and the reception range can be further expanded compared to a single optical lens.

[0058] Figure 4A FIG is a side view of an optical recognition device 100 according to some other embodiments of the present disclosure. Figure 1 as well as Figure 4A In some embodiments, the non-coaxial optical lens assemblies 114 and 116 further include reflectors 114c and 116c located on the side of the non-coaxial optical lens assemblies 114 and 116 adjacent to the sensing element 130. Specifically, the reflectors 114c and 116c correspond to the non-coaxial optical lens assemblies 114 and 116, respectively. In other words, in combination with the array arrangement discussed in the previous paragraph (e.g., Figure 3A as well as Figure 3B(A rectangular or hexagonal arrangement is shown in the figure). Reflectors 114c and 116c are also arranged in accordance with the array arrangement, corresponding to non-coaxial optical lens assemblies 114 and 116, respectively. For example, the optical signal received by non-coaxial optical lens assembly 114 will pass through lenses 114a and 114b, then through reflector 114c and filter 120 to be received by sensor 130. However, the present disclosure is not limited to this. Other suitable optical components may be added to improve the quality of the optical signal without changing the aforementioned optical path. The provision of reflectors 114c and 116c further controls the direction in which the optical signal is directed to sensor 130, ensuring that the optical signal passing through the lenses (e.g., lenses 114a, 114b or lenses 116a, 116b) accurately reaches and is received by sensor 130.

[0059] Figure 4B FIG is a side view of an optical recognition device 100 according to some other embodiments of the present disclosure. Figure 1 、 Figure 4A as well as Figure 4B In some embodiments, the non-coaxial optical lens assemblies 114 and 116 further include collimating lenses 114d and 116d located on the side of the non-coaxial optical lens assemblies 114 and 116 adjacent to the sensor element 130, and positioned between at least two lenses (e.g., lenses 114a and 114b or lenses 116a and 116b) and the reflectors 114c and 116c. Specifically, the collimating lenses 114d and 116d are also disposed corresponding to the non-coaxial optical lens assemblies 114 and 116, respectively, and may also be arranged in combination with the aforementioned array arrangement. For example, the optical signal received by the non-coaxial optical lens assembly 114 will pass through the lenses 114a and 114b, then sequentially through the collimating lens 114d and the reflector 114c, and then through the filter 120 before being received by the sensor element 130. However, the present disclosure is not limited to this embodiment; other suitable optical components may be added without changing the aforementioned optical path to improve the optical signal quality. Collimating lenses 114d and 116d can converge and amplify discrete optical signals, thereby providing a clearer single optical signal. Furthermore, the addition of collimating lenses 114d and 116d to the reflectors 114c and 116c can better ensure that all optical signals are directed to the sensor element 130, and these optical signals will have both high fidelity and high definition.

[0060] The actual operation process of the optical recognition device 100 will be described below. Figure 5 FIG is a diagram illustrating a usage scenario of the optical recognition device 100 according to some embodiments of the present disclosure. Figure 5, the optical recognition device 100 is set on one side of the display screen 200. The display screen 200 can emit light through its own light source or an additional light source (not shown). The user can use his or her own biometric features (for example, fingerprints) to approach or touch the display screen 200 so that light is reflected from the display screen 200 to the optical recognition device 100, and further through optical recognition, the biometric features have the effect of unlocking or operating the display screen 200. It should be mentioned that, Figure 5 The array lens assembly 110, optical filter 120, and sensor element 130 included in the optical recognition device 100 described below can be used in conjunction with similar or identical components (e.g., the arrangement of the optical lens assembly and the vignetting stop) mentioned in the previous paragraphs, and the description thereof will not be repeated here.

[0061] Reference Figure 5 In the illustrated usage scenario, when light is reflected from a user's finger, it will have unique reflection patterns in different areas based on the user's fingerprint characteristics. These reflection patterns are received by multiple optical lens groups 112, 114, and 116 in the array lens assembly 110. Specifically, the light signal receiving areas of each optical lens group 112, 114, and 116 are generally different, but adjacent optical lens groups may have partially overlapping light signal receiving areas. For example, the light signal receiving areas of optical lens groups 112 and 114, or optical lens groups 114 and 116, may partially overlap at their junction. Figure 5 The optical paths depicted in FIG. 1 only depict the non-overlapping regions between each optical lens assembly 112, 114, and 116. However, in actual applications, the optical signals in the overlapping regions between each optical lens assembly 112, 114, and 116 will be subtracted during subsequent signal processing to ultimately obtain the correct optical signals. The signals received by the optical lens assemblies 112, 114, and 116 are then directed to the image sensing area of the sensor assembly 130.

[0062] It should be noted that the design goal of the aforementioned array lens assembly 110 is to ensure that each optical lens assembly 112, 114, and 116 is responsible for collecting high-fidelity optical signals from different areas. The optical lenses 112, 114, and 116 optimize their imaging results through the aforementioned lens shape, arrangement, and vignetting stop settings to produce optical signals with the lowest possible distortion. The use of vignetting stops further controls the shape of the imaging circle to facilitate subsequent assembly of the overall optical signal and processing of optical signals in overlapping areas. Furthermore, the optical lenses 112, 114, and 116 further reduce the optical signal to form an image, allowing the complete image generated by each optical lens assembly 112, 114, and 116 to be fully received by the sensor assembly 130. The image sensor area converts the received optical signal into an electrical signal and transmits it to an external processing unit for analysis to determine the user's fingerprint characteristics.

[0063] The present disclosure uses a single sensing element 130 to receive multiple optical lens sets (e.g., Figure 5 The optical lens assembly 112, 114, and 116 shown can reduce the manufacturing cost of the optical recognition device 100. However, the use of a single sensor element 130 must be combined with an optical imaging system with good imaging performance (for example, the array lens assembly 110) to obtain a clear and realistic optical signal. This optical signal can contain the user's fingerprint information, further becoming a biometric key, allowing the user to control the operation of electronic components and protect personal information from being stolen.

[0064] From the above detailed description of the specific embodiments of the present disclosure, it is apparent that in the optical recognition device of the present disclosure, by arranging the lens array in various configurations (e.g., rectangular, hexagonal, combined, and random), the optical recognition device can provide different optical signal reception areas. Furthermore, the lens array, comprised of multiple optical lens assemblies, also provides an expanded optical signal reception area. Furthermore, by varying the outer edge shape of the optical lens assemblies and using a vignetting stop, the optical signal imaging area can be further controlled, allowing a single sensor element to accurately capture and combine multiple optical lens assemblies. Furthermore, through the synergistic effect of the aforementioned optical lens assemblies and vignetting stops, the optical recognition device can obtain accurate and clear optical signals by simply using a single sensor element to capture multiple optical lens assemblies.

[0065] The foregoing summarizes the features of several embodiments so that those skilled in the art can better understand the aspects of the present disclosure. Those skilled in the art will appreciate that they can readily use this disclosure as a basis for designing or modifying other processes and structures for achieving the same purposes and / or achieving the same advantages of the embodiments described herein. Those skilled in the art will also recognize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they can make various changes, substitutions, and replacements herein without departing from the spirit and scope of the present disclosure.

Claims

1. An optical recognition device, characterized in that: Include: An array lens assembly comprising a plurality of optical lens assemblies, wherein each of the optical lens assemblies comprises at least two lenses; an optical filter, located on one side of the array lens assembly; and A single sensing element is located on a side of the optical filter away from the array lens assembly and optically coupled to the optical lens assembly via the optical filter. The single sensing element has an image sensing area, and an optical axis of a coaxial optical lens assembly in the optical lens assembly is parallel to a central axis perpendicular to the image sensing area. A non-coaxial optical lens assembly in the optical lens assembly is arranged beside the central axis, and the non-coaxial optical lens assembly further includes a reflector located on a side of the non-coaxial optical lens assembly adjacent to the single sensing element.

2. The optical recognition device according to claim 1, wherein One of the optical lens sets includes at least one aspherical lens.

3. The optical recognition device according to claim 1, wherein: The at least two lenses of the non-coaxial optical lens set both have curvature and include at least one aspherical lens or a free-form surface.

4. The optical recognition device according to claim 1, wherein: The non-coaxial optical lens assembly further includes a collimating lens located on a side of the non-coaxial optical lens assembly adjacent to the single sensing component and between the at least two lenses and the reflective mirror.

5. The optical recognition device according to claim 1, wherein: The optical lens sets are arranged in a rectangular array, and the at least two lenses of each of the optical lens sets respectively have a rectangular outer edge.

6. The optical recognition device according to claim 5, wherein: The optical system further comprises a vignetting stop disposed on one side of the array lens group, the vignetting stop corresponding to one of the optical lens groups, and the vignetting stop is a rectangular opening.

7. The optical recognition device according to claim 1, wherein: The optical lens set is arranged in a hexagonal array, and the at least two lenses of each of the optical lens sets respectively have a hexagonal outer edge.

8. The optical recognition device according to claim 7, wherein: It further includes a vignetting stop, which is disposed on one side of the array lens group, the vignetting stop corresponds to one of the optical lens groups, and the vignetting stop is a hexagonal opening.

9. The optical recognition device according to claim 1, wherein: The optical lens groups in the array lens group are randomly arranged.

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