Optical fingerprint module capable of preventing lens mixing

Abstract

The embodiment of the utility model belongs to the technical field of optical fingerprint modules. The utility model also relates to an optical fingerprint module for preventing lens mixing, which comprises a module main body, the module main body comprises a lens bracket, the lens bracket is provided with a lens mold cavity groove, and the lens mold cavity groove is used for identifying the module main body. The lens bracket is provided with the lens mold cavity groove, the lens mold cavity groove is used for identifying the module main body, the contour of the lens mold cavity groove at a specific position is identified and matched in the production process, the lens can be carried only when the contour of the lens mold cavity groove of the lens of the item can be normally identified, and if the contour cannot be identified, the lens is abnormal. And the material mixing prevention and interception functions are achieved, and the risk that materials are mistakenly used due to similar shapes is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fingerprint modules, and more specifically, to an optical fingerprint module capable of preventing lens mixing. Background Art

[0002] With the continuous development of modern electronic technology, optical fingerprint modules are increasingly used in electronic devices such as smart phones and tablets. Optical fingerprint modules are also widely used. In the production process, optical fingerprint modules need to be assembled and tested through three processes: SMT (completing the attachment of components on the flexible circuit board), COB (completing chip binding, IR attachment, and lens mounting), and testing (completing functional testing). For different projects, the lens components have the same body size. Large module factories have many projects at the same time, and there are modules of various sizes. There are also many modules with similar shapes or exactly the same dimensions.

[0003] During the assembly process of the optical fingerprint module, the accuracy and matching of the lens components have a crucial impact on the overall performance of the module. However, in actual production, since different projects may use lens components with similar appearance but different functions, there is a risk of misusing materials. Therefore, we have made improvements to this and proposed an optical fingerprint module that prevents lens mixing. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the utility model is that since different projects may use lens components with similar appearance but different functions, there is a risk of misusing materials.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An optical fingerprint module for preventing lens mixing comprises: a module body, wherein the module body comprises a lens bracket, and the lens bracket is provided with a lens mold cavity groove, and the lens mold cavity groove is used for identifying the module body.

[0007] As an improvement of the utility model, the module body also includes an FPC body connected to the bottom of the lens bracket, a die chip located in the lens bracket is installed on the top of the FPC body, and an IR chip is connected to the top of the die chip.

[0008] As an improvement of the present invention, a through hole is provided in the middle of the lens bracket, and a lens body is installed in the through hole, and the positions of the die chip, the IR chip and the lens body correspond to each other.

[0009] As an improved manner of the present invention, a first reinforcement plate is fixedly connected to the bottom of the FPC body, and the first reinforcement plate is located directly below the lens bracket.

[0010] As an improved manner of the utility model, an FPC connector is also installed on the top of the FPC body, and the FPC connector is located on one side of the FPC body.

[0011] As an improved manner of the present invention, a second reinforcement plate is fixedly connected to the bottom of the FPC body, and the second reinforcement plate is located directly below the FPC connector.

[0012] As an improvement of the present invention, a laser QR code is provided at the bottom of the second reinforcement plate.

[0013] As an improvement of the present invention, the lens bracket and the FPC body, the die chip and the FPC body, and the die chip and the IR chip are all connected by glue.

[0014] As an improvement of the utility model, a lens barrel is arranged above the lens bracket, a double-sided tape is pasted on the bottom of the lens barrel, the double-sided tape is pasted on the top of the lens bracket, and a protective film corresponding to the position of the lens body is arranged in the double-sided tape.

[0015] As an improved method of the utility model, two diagonal parts of the top of the lens bracket are fixedly connected with positioning columns, and two positioning grooves are provided on the lens barrel, and the two positioning grooves are respectively plugged into the outer surfaces of the two positioning columns.

[0016] Compared with the prior art, the embodiments of the present invention mainly have the following beneficial effects:

[0017] In order to solve the problem in the prior art that different projects may use lens assemblies with similar appearance but different functions, there is a risk of misuse of materials, the present application sets a lens mold cavity groove on the lens bracket, and the lens mold cavity groove is used to identify the module body. During the production process, the contour of the lens mold cavity groove at a specific position is first identified and matched. The lens can only be installed if the contour of the lens mold cavity groove of the lens of the project can be normally identified. If it cannot be identified, it is an abnormality, which plays the role of preventing material mixing and intercepting, and avoids the risk of misuse of materials due to similar appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of an optical fingerprint module for preventing lens mixing provided by the present application;

[0019] Figure 2 A schematic diagram of the structure of an optical fingerprint module for preventing lens mixing provided by the present application;

[0020] Figure 3 The optical fingerprint module for preventing lens mixing provided by the present application Figure 1 Schematic diagram of the structure viewed from above;

[0021] Figure 4 A schematic structural diagram of a module body of an optical fingerprint module for preventing lens mixing provided by the present application;

[0022] Figure 5 A schematic cross-sectional structure diagram of a bracket of an optical fingerprint module for preventing lens mixing provided in the present application.

[0023] Indicated in the figure:

[0024] 1. Module body; 101. Lens bracket; 102. FPC body; 103. Die chip; 104. IR chip; 105. Lens body; 106. First reinforcement plate; 107. Positioning column; 108. FPC connector; 109. Second reinforcement plate; 2. Lens barrel; 201. Double-sided tape; 203. Positioning groove; 3. Lens cavity groove; 4. Laser QR code. DETAILED DESCRIPTION

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present invention belongs; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Reference to "embodiments" herein means that specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] As described in the background technology, during the assembly process of the optical fingerprint module, the accuracy and matching of the lens assembly have a crucial impact on the overall performance of the module. However, in actual production, since different projects may use lens assemblies with similar appearance but different functions, there is a risk of misusing materials.

[0027] In order to solve this technical problem, the utility model provides an optical fingerprint module for preventing lens mixing.

[0028] Specifically, please refer to Figure 1 and Figure 4 , the optical fingerprint module to prevent lens mixing specifically includes:

[0029] The module body 1 includes a lens bracket 101 . The lens bracket 101 is provided with a lens mold cavity groove 3 . The lens mold cavity groove 3 is used for identifying the module body 1 .

[0030] The utility model provides an optical fingerprint module for preventing lens mixing. The present application sets a lens mold cavity groove 3 on the lens bracket 101. The lens mold cavity groove 3 is used for identifying the module body 1. During the production process, the contour of the lens mold cavity groove 3 at a specific position is first identified and matched. The lens can only be mounted if the contour of the lens mold cavity groove 3 of the lens of the project can be normally identified. If it cannot be identified, it is an abnormality. The module plays the role of preventing material mixing and intercepting, and avoids the risk of misusing materials due to similar appearance.

[0031] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] Embodiment 1 of the optical fingerprint module for preventing lens mixing according to the utility model

[0035] Please refer to Figure 1 and Figure 4 The optical fingerprint module for preventing lens mixing of the utility model comprises: a module body 1, the module body 1 comprises a lens bracket 101, a lens mold cavity groove 3 is arranged on the lens bracket 101, and the lens mold cavity groove 3 is used for identifying the module body 1. In the present application, the lens mold cavity groove 3 is arranged on the lens bracket 101, and the lens mold cavity groove 3 is used for identifying the module body 1. During the production process, the contour of the lens mold cavity groove 3 at a specific position is first identified and matched. The lens can be mounted only if the contour of the lens mold cavity groove 3 of the lens of the project can be normally identified. If it cannot be identified, it is abnormal, which plays the role of preventing mixing and intercepting, and realizes the avoidance of the risk of misusing materials due to similar appearance.

[0036] The setting of the lens mold cavity groove 3, at the lens mounting position of the COB section, is to first identify and match the contour of the lens mold cavity groove 3 before the lens body 105 is mounted. The lens can be mounted only if the contour of the lens mold cavity groove 3 of the project can be normally identified. If the lens cannot be identified, it is confirmed as an abnormal lens, and an alarm is issued to prompt the relevant technical personnel to confirm, thereby playing the role of preventing material mixing and intercepting, and avoiding the risk of misusing materials for lenses with similar appearances.

[0037] Embodiment 2 of the optical fingerprint module for preventing lens mixing according to the utility model

[0038] Please refer to Figure 1 and Figure 4 The optical fingerprint module for preventing lens mixing of the utility model comprises: a module body 1, the module body 1 comprises a lens bracket 101, a lens mold cavity groove 3 is arranged on the lens bracket 101, and the lens mold cavity groove 3 is used for identifying the module body 1. The present application arranges the lens mold cavity groove 3 on the lens bracket 101, and the lens mold cavity groove 3 is used for identifying the module body 1.

[0039] The setting of the lens mold cavity groove 3, at the lens mounting position of the COB section, is to first identify and match the contour of the lens mold cavity groove 3 before the lens body 105 is mounted. The lens can be mounted only if the contour of the lens mold cavity groove 3 of the project can be normally identified. If the lens cannot be identified, it is confirmed as an abnormal lens, and an alarm is issued to prompt the relevant technical personnel to confirm, thereby playing the role of preventing material mixing and intercepting, and avoiding the risk of misusing materials for lenses with similar appearances.

[0040] Further, such as Figure 4-Figure 5 As shown, the module body 1 also includes an FPC body 102 connected to the bottom of the lens bracket 101, a die chip 103 located in the lens bracket 101 is installed on the top of the FPC body 102, and an IR chip 104 is connected to the top of the die chip 103. The lens bracket 101 can protect the die chip 103 and the IR chip 104.

[0041] Further, such as Figure 4 As shown, a through hole is provided in the middle of the lens bracket 101, and a lens body 105 is installed in the through hole. The positions of the die chip 103, the IR chip 104 and the lens body 105 correspond to each other, and the lens bracket 101 can support the lens body 105.

[0042] Further, such as Figure 3-Figure 5 As shown, a first reinforcing plate 106 is fixedly connected to the bottom of the FPC body 102, and the first reinforcing plate 106 is located directly below the lens bracket 101. The setting of the first reinforcing plate 106 can reinforce the corresponding parts of the FPC body 102 and the lens bracket 101, thereby improving the stability of the connection between the lens bracket 101 and the FPC body 102.

[0043] Further, such as Figure 1 and Figure 4 As shown, an FPC connector 108 is also installed on the top of the FPC body 102. The FPC connector 108 is located on one side of the FPC body 102. The FPC connector 108 is used to connect the FPC body 102 and corresponding components.

[0044] Further, such as Figure 3 and Figure 4 As shown, a second reinforcement plate 109 is fixedly connected to the bottom of the FPC body 102, and the second reinforcement plate 109 is located directly below the FPC connector 108. The second reinforcement plate 109 can reinforce the corresponding parts of the FPC body 102 and the FPC connector 108, thereby facilitating the plugging and unplugging of the FPC connector 108.

[0045] Further, such as Figure 3 As shown, a laser two-dimensional code 4 is provided at the bottom of the second reinforcement plate 109; the provision of the laser two-dimensional code 4 facilitates later data analysis and defect tracing.

[0046] Furthermore, glue is used to connect the lens bracket 101 and the FPC body 102, the die chip 103 and the FPC body 102, and the die chip 103 and the IR chip 104. The glue connection has a sealing function to achieve a dust-proof effect.

[0047] Embodiment 3 of the optical fingerprint module for preventing lens mixing according to the utility model

[0048] Please refer to Figure 1 and Figure 4 The optical fingerprint module for preventing lens mixing of the utility model comprises: a module body 1, the module body 1 comprises a lens bracket 101, a lens mold cavity groove 3 is arranged on the lens bracket 101, and the lens mold cavity groove 3 is used for identifying the module body 1. The present application arranges the lens mold cavity groove 3 on the lens bracket 101, and the lens mold cavity groove 3 is used for identifying the module body 1.

[0049] The setting of the lens mold cavity groove 3, at the lens mounting position of the COB section, is to first identify and match the contour of the lens mold cavity groove 3 before the lens body 105 is mounted. The lens can be mounted only if the contour of the lens mold cavity groove 3 of the project can be normally identified. If the lens cannot be identified, it is confirmed as an abnormal lens, and an alarm is issued to prompt the relevant technical personnel to confirm, thereby playing the role of preventing material mixing and intercepting, and avoiding the risk of misusing materials for lenses with similar appearances.

[0050] Further, such as Figure 4-Figure 5 As shown, the module body 1 also includes an FPC body 102 connected to the bottom of the lens bracket 101, a die chip 103 located in the lens bracket 101 is installed on the top of the FPC body 102, and an IR chip 104 is connected to the top of the die chip 103. The lens bracket 101 can protect the die chip 103 and the IR chip 104.

[0051] Further, such as Figure 4As shown, a through hole is provided in the middle of the lens bracket 101, and a lens body 105 is installed in the through hole. The positions of the die chip 103, the IR chip 104 and the lens body 105 correspond to each other, and the lens bracket 101 can support the lens body 105.

[0052] Further, such as Figure 3-Figure 5 As shown, a first reinforcing plate 106 is fixedly connected to the bottom of the FPC body 102, and the first reinforcing plate 106 is located directly below the lens bracket 101. The setting of the first reinforcing plate 106 can reinforce the corresponding parts of the FPC body 102 and the lens bracket 101, thereby improving the stability of the connection between the lens bracket 101 and the FPC body 102.

[0053] Further, such as Figure 1 and Figure 4 As shown, an FPC connector 108 is also installed on the top of the FPC body 102. The FPC connector 108 is located on one side of the FPC body 102. The FPC connector 108 is used to connect the FPC body 102 and corresponding components.

[0054] Further, such as Figure 3 and Figure 4 As shown, a second reinforcement plate 109 is fixedly connected to the bottom of the FPC body 102, and the second reinforcement plate 109 is located directly below the FPC connector 108. The second reinforcement plate 109 can reinforce the corresponding parts of the FPC body 102 and the FPC connector 108, thereby facilitating the plugging and unplugging of the FPC connector 108.

[0055] Further, such as Figure 3 As shown, a laser QR code 4 is provided at the bottom of the second reinforcement plate 109; the provision of the laser QR code 4 facilitates later data analysis and defect tracing. At present, most projects basically set the laser QR code 4 on the first reinforcement plate 106 according to the requirements of the whole machine client. Through the analysis of a large number of defective modules, it is found that after the first reinforcement plate 106 is laser engraved, the high temperature generated during the laser engraving process causes the first reinforcement plate 106 to deform, the center position bulges, and the center produces a warp of 10~15um relative to the four corners. Therefore, for the modules produced according to the normal production process parameter requirements, the distance between the center of the lens body 105 and the die chip 103 and the IR chip 104 is simultaneously shortened by 10um~15um, resulting in a decrease in the resolution of the module and a defect loss of 20%~30%. The present application sets the laser QR code 4 on the second reinforcement plate 109, which will not affect the module function and meet the requirements of QR code tracing, while avoiding the poor resolution caused by the deformation of the first reinforcement plate 106 caused by laser engraving.

[0056] Furthermore, glue is used to connect the lens bracket 101 and the FPC body 102, the die chip 103 and the FPC body 102, and the die chip 103 and the IR chip 104. The glue connection has a sealing function to achieve a dust-proof effect.

[0057] Further, such as Figure 1-Figure 3 As shown, a lens barrel 2 is arranged above the lens bracket 101, and a double-sided tape 201 is pasted on the bottom of the lens barrel 2. The double-sided tape 201 is pasted on the top of the lens bracket 101. A protective film corresponding to the position of the lens body 105 is arranged in the double-sided tape 201, and the protective film can protect the lens body 105.

[0058] Further, such as Figure 1-Figure 4 As shown, two diagonal parts of the top of the lens bracket 101 are fixedly connected with positioning posts 107, and two positioning grooves 203 are provided on the lens barrel 2. The two positioning grooves 203 are respectively plugged into the outer surfaces of the two positioning posts 107. The arrangement of the positioning grooves 203 and the positioning posts 107 can be used for positioning during the connection process between the double-sided tape 201 and the lens bracket 101, so as to improve the accuracy of the fitting between the double-sided tape 201 and the lens bracket 101, that is, when the double-sided tape 201 is fitted to the top of the lens bracket 101, the double-sided tape 201 and the lens bracket 101 can be aligned by plugging the positioning grooves 203 and the positioning posts 107 together.

[0059] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. An optical fingerprint module for preventing lens mixing, characterized in that: include: A module body (1), the module body (1) comprising a lens bracket (101), the lens bracket (101) being provided with a lens mold cavity groove (3), the lens mold cavity groove (3) being used for identifying the module body (1).

2. The optical fingerprint module for preventing lens mixing according to claim 1, characterized in that: The module body (1) further comprises an FPC body (102) connected to the bottom of the lens bracket (101); a die chip (103) located in the lens bracket (101) is mounted on the top of the FPC body (102); and an IR chip (104) is connected to the top of the die chip (103).

3. The optical fingerprint module for preventing lens mixing according to claim 2, characterized in that: A through hole is provided in the middle of the lens bracket (101), and a lens body (105) is installed in the through hole; the positions of the die chip (103), the IR chip (104) and the lens body (105) correspond to each other.

4. The optical fingerprint module for preventing lens mixing according to claim 3, characterized in that: A first reinforcement plate (106) is fixedly connected to the bottom of the FPC body (102), and the first reinforcement plate (106) is located directly below the lens bracket (101).

5. The optical fingerprint module for preventing lens mixing according to claim 4, characterized in that: An FPC connector (108) is also installed on the top of the FPC body (102), and the FPC connector (108) is located on one side of the FPC body (102).

6. The optical fingerprint module for preventing lens mixing according to claim 5, characterized in that: A second reinforcement plate (109) is fixedly connected to the bottom of the FPC body (102), and the second reinforcement plate (109) is located directly below the FPC connector (108).

7. The optical fingerprint module for preventing lens mixing according to claim 6, characterized in that: A laser QR code (4) is provided at the bottom of the second reinforcement plate (109).

8. The optical fingerprint module for preventing lens mixing according to claim 7, characterized in that: The lens bracket (101) and the FPC body (102), the die chip (103) and the FPC body (102), and the die chip (103) and the IR chip (104) are all connected by glue.

9. The optical fingerprint module for preventing lens mixing according to claim 8, characterized in that: A lens barrel (2) is arranged above the lens bracket (101), a double-sided adhesive tape (201) is adhered to the bottom of the lens barrel (2), the double-sided adhesive tape (201) is adhered to the top of the lens bracket (101), and a protective film corresponding to the position of the lens body (105) is arranged in the double-sided adhesive tape (201).

10. The optical fingerprint module for preventing lens mixing according to claim 9, characterized in that: Positioning columns (107) are fixedly connected to two diagonal positions on the top of the lens bracket (101), and two positioning grooves (203) are provided on the lens barrel (2), and the two positioning grooves (203) are respectively plugged into the outer surfaces of the two positioning columns (107).

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