Periscopic optical fingerprint module

Abstract

The embodiment of the utility model belongs to the technical field of fingerprint identification. The utility model also relates to a periscopic optical fingerprint module which comprises a housing, one side of the housing is provided with a light input part, the housing is provided with an optical fingerprint assembly, the housing is internally provided with a reflection lens, the reflection lens is located between the optical fingerprint assembly and the light input part, and the optical fingerprint assembly is provided with an optical fingerprint. And the reflecting lens is used for refracting light input by the light input part so as to realize optical fingerprint identification of the optical fingerprint assembly. According to the optical fingerprint unlocking module, the reflection lens is arranged, the light path is changed through the reflection lens, the limitation of a traditional optical fingerprint unlocking module in the installation structure and direction is broken through, the refraction design effectively shortens the occupied space of the module in the equipment thickness direction, the optical fingerprint unlocking technology can be applied to thinner intelligent equipment, and the application range is wide. And the requirements of the market on light and thin products are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fingerprint identification, more particularly to a periscopic optical fingerprint module. BACKGROUND

[0002] With the rapid development of optical fingerprint unlocking technology, this technology has been widely used in various intelligent devices, providing users with more convenient and secure unlocking methods. Traditional optical fingerprint unlocking modules usually capture fingerprint images directly for identification, and the unlocking process depends on the quality and clarity of the fingerprint image. However, in actual application, traditional optical fingerprint unlocking modules face some challenges and limitations.

[0003] Since the module needs to capture fingerprint images directly, it is usually designed as a linear structure, including a lens system and an image sensor, etc. This design results in a longer overall module, thereby imposing higher requirements on its thickness and space design during device installation. Therefore, we improve it and propose a periscopic optical fingerprint module. SUMMARY

[0004] The technical problem to be solved by the embodiments of the utility model is the limitation of the installation position and direction of the optical fingerprint module.

[0005] To solve the above technical problems, the utility model adopts the technical scheme as follows:

[0006] A periscopic optical fingerprint module, comprising: a shell, the shell is provided with a light input part on one side, the shell is provided with an optical fingerprint assembly, and a reflecting mirror is arranged in the shell, the reflecting mirror is located between the optical fingerprint assembly and the light input part, and the reflecting mirror is used for refracting the light input by the light input part to realize optical fingerprint identification of the optical fingerprint assembly. By changing the light path through the reflecting mirror, the application breaks the limitation of the traditional optical fingerprint unlocking module in installation structure and direction, and the refractive design effectively shortens the occupied space of the module in the thickness direction of the device, so that the optical fingerprint unlocking technology can be applied to thinner intelligent devices, meeting the market demand for lightweight products.

[0007] As an improved way of the utility model, the light input part includes a light input port opened on one side of the shell, and a protective mirror is fixedly installed in the light input port.

[0008] As an improved way of the utility model, the surface of the protective mirror is coated with an anti-fingerprint coating, effectively preventing oil stains and fingerprints from being contaminated during daily use and maintaining the clarity of light input.

[0009] As an improved mode of the utility model, the optical fingerprint assembly includes a circuit board mounted on the bottom of the shell, a CMOS sensor located in the shell is mounted on the top of the circuit board, the CMOS sensor is the core component of fingerprint identification, can acutely capture the texture features of the surface of the finger, clearly present the texture details of the finger and convert into accurate digital signals, and reliably support the data for the subsequent comparison and identification links.

[0010] As an improved mode of the utility model, the top of the CMOS sensor is provided with a filter.

[0011] As an improved mode of the utility model, the top of the circuit board is further provided with a lens seat, the CMOS sensor and the filter are located in the lens seat, the lens seat provides physical protection for the important optical components such as the CMOS sensor and the filter, reduces the pixel damage and failure of the CMOS sensor due to collision, prolongs the service life of the key components, reduces the maintenance frequency and cost, and ensures the long-term stable operation of the module.

[0012] As an improved mode of the utility model, the top of the lens seat is provided with a lens hole, and a lens group is arranged in the lens hole.

[0013] As an improved mode of the utility model, the bottom of the lens seat is connected with double-sided adhesive, and the bottom of the double-sided adhesive is connected with the top of the circuit board.

[0014] As an improved mode of the utility model, the bottom of the circuit board is connected with a connector.

[0015] As an improved mode of the utility model, the connection between the circuit board and the shell is glued.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] In order to solve the problem that the installation position and direction of the optical fingerprint module in the prior art are limited, the present application changes the light path through the reflection mirror, breaks the limitation of the traditional optical fingerprint unlocking module in the installation structure and direction, effectively shortens the occupied space of the module in the thickness direction of the equipment, so that the optical fingerprint unlocking technology can be applied to thinner intelligent equipment, and meets the market demand for light and thin products. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure schematic diagram of the periscopic optical fingerprint module provided by the present application is shown in the figure.

[0019] Figure 2 The cross-sectional structure schematic diagram of the periscopic optical fingerprint module provided by the present application is shown in the figure.

[0020] Figure 3 Structure diagram of light input port of periscope optical fingerprint module provided in the present application;

[0021] Figure 4 Structure diagram of CMOS sensor and optical filter of periscope optical fingerprint module provided in the present application;

[0022] Figure 5 Light refraction path diagram of periscope optical fingerprint module provided in the present application.

[0023] Indicated in the figure:

[0024] 1, housing; 101, light input port; 102, protective lens; 2, optical fingerprint assembly; 201, circuit board; 202, CMOS sensor; 203, optical filter; 204, double-sided adhesive; 205, lens seat; 206, lens hole; 207, lens group; 208, connector; 3, reflecting lens. DETAILED DESCRIPTION

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing specific embodiments only and is not intended to be limiting of the application. As used herein, the expression "embodiment" means that a specific feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification indicates that the phrase does not necessarily refer to the same embodiment, nor is it necessarily mutually exclusive of other embodiments. It will be explicitly understood by one of ordinary skill in the art that the embodiments described herein can be combined with other embodiments.

[0026] As described in the background, the conventional optical fingerprint unlocking module generally identifies by directly capturing a fingerprint image, and its unlocking process depends on the quality and clarity of the fingerprint image. However, in actual application, the conventional optical fingerprint unlocking module faces some challenges and limitations; since the module needs to directly capture a fingerprint image, it is usually designed as a linear structure, including a lens system and an image sensor, etc. This design results in a relatively long module, thereby imposing higher requirements on its thickness and space design when the device is installed.

[0027] In order to solve this technical problem, the present application provides a periscope optical fingerprint module.

[0028] Specifically, please refer to Figures 1-5 , the periscope optical fingerprint module specifically comprises:

[0029] The shell 1 is provided with a light input part on one side, the shell 1 is provided with an optical fingerprint assembly 2, and the shell 1 is provided with a reflecting mirror 3, the reflecting mirror 3 is located between the optical fingerprint assembly 2 and the light input part, and the reflecting mirror 3 is used for refracting light input by the light input part to realize optical fingerprint identification of the optical fingerprint assembly 2.

[0030] The periscopic optical fingerprint module provided by the utility model breaks the limitation of traditional optical fingerprint unlocking modules in installation structure and direction, effectively shortens the occupied space of the module in the thickness direction of the equipment through refraction design, enables the optical fingerprint unlocking technology to be applied to thinner intelligent equipment, and meets the market demand for light and thin products.

[0031] In order to enable personnel in the technical field to better understand the utility model scheme, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings.

[0032] It should be noted that, in the case of no conflict, the embodiments in the utility model and the features and technical solutions in the embodiments can be combined with each other.

[0033] It should be noted that: similar labels and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0034] Embodiment one of the periscopic optical fingerprint module of the utility model

[0035] Please refer to Figures 1-5 The periscopic optical fingerprint module of the utility model comprises a shell 1, a light input part is arranged on one side of the shell 1, an optical fingerprint assembly 2 is arranged on the shell 1, and a reflecting mirror 3 is arranged in the shell 1, the reflecting mirror 3 is located between the optical fingerprint assembly 2 and the light input part, and the reflecting mirror 3 is used for refracting light input by the light input part to realize optical fingerprint identification of the optical fingerprint assembly 2; the reflecting mirror 3 is arranged, the light path is changed through the reflecting mirror 3, the limitation of traditional optical fingerprint unlocking modules in installation structure and direction is broken, the occupied space of the module in the thickness direction of the equipment is effectively shortened through refraction design, the optical fingerprint unlocking technology can be applied to thinner intelligent equipment, and the market demand for light and thin products is met.

[0036] The traditional optical fingerprint unlocking module is limited by fixed mounting structure and single light transmission direction, and often needs to reserve a large longitudinal space in the device, and the application utilizes the reflecting lens 3 to refract light, replans the light path, avoids the disadvantages of the traditional design, opens up a new way for the rapid development of thin and light intelligent devices, conforms to the market trend, and greatly enhances the competitiveness of products in the market.

[0037] Embodiment two of the periscopic optical fingerprint module

[0038] Further, as shown in the figure, Figures 1-3 The light input part includes a light input port 101 opened in one side of the shell 1, and a protective lens 102 is fixedly installed in the light input port 101. The light input port 101 and the protective lens 102 cooperate to provide a channel for the entry of light. The protective lens 102 can block dust, small debris and possible water vapor from the outside by relying on its own physical barrier, preventing these impurities from entering the internal module and causing erosion, short circuit and other damage to the precise optical elements and electronic circuits. The protective lens 102 is made of high-transmittance material, which ensures that the light can penetrate.

[0039] Further, the surface of the protective lens 102 is coated with an anti-fingerprint coating, which effectively prevents oil stains and fingerprints from being contaminated during daily use, maintains the clarity of light input, and maintains the clarity of light input. When used frequently, the fingers frequently contact the protective lens 102, and each touch can leave oil stains, fingerprints and other stains on the surface of the protective lens 102. If these stains are not cleaned in time, the light will be scattered and refracted irregularly when it is irradiated, and the light propagation path will be disordered, which will seriously affect the quality of the light. The anti-fingerprint coating has a special hydrophobic and oleophobic microstructure, which makes it difficult for oil stains and fingerprints to adhere, effectively improves the recognition accuracy, reduces the misjudgment caused by light interference, and optimizes the user experience.

[0040] The anti-fingerprint coating is made of fluorosilane coating. Fluorosilane is an organosilicon compound, which contains fluorine atoms and silicon atoms in its molecular structure. The silicon atoms can react with the silicon hydroxyl groups on the surface of the protective lens through chemical bonds, thereby firmly adhering to the surface of the protective lens 102. The presence of fluorine atoms is the key to the anti-fingerprint performance. The fluorine atoms have extremely low surface energy, making the coating surface exhibit strong hydrophobicity and oleophobicity. In practical applications, the fluorosilane coating can effectively prevent the adhesion of oil, sweat and other pollutants in fingerprints. When the pollutants come into contact with the protective lens 102 coated with fluorosilane coating, due to the extremely low surface energy of the fluorine atoms, the pollutants are difficult to spread and adsorb on the surface, which helps to keep the protective lens 102 clean and ensure that the light can pass through smoothly, thereby ensuring the accuracy and stability of the optical fingerprint recognition.

[0041] The utility model periscopic optical fingerprint module's embodiment three

[0042] The utility model periscopic optical fingerprint module further, as Figures 1-4 The optical fingerprint assembly 2 includes the circuit board 201 installed at the bottom of the shell 1, the top of the circuit board 201 is equipped with the CMOS sensor 202 in the shell 1, the CMOS sensor 202 is as the core component of fingerprint identification, can sharply capture the texture feature of the finger surface, clearly presents and converts the accurate digital signal of the finger texture details, transports the reliable key data support for the subsequent comparison, identification link.

[0043] Further, as Figure 4 As shown in the drawing, the top of the CMOS sensor 202 is equipped with the optical filter 203, the external environment light component is complex and various, contains various different wavelengths, intensity light, if these light is directly irradiated on the CMOS sensor 202 without filtering, a large amount of irrelevant light information will be mixed with the fingerprint reflected light, cause the collected fingerprint image to be fuzzy, many noise points, greatly increase the subsequent identification misjudgment risk, the optical filter 203 can block the light that is not needed, only allow the specific wavelength light closely related with fingerprint identification to pass through smoothly, and then significantly improve the definition and discernibility of the fingerprint image, reduce the misidentification rate, improve the security.

[0044] Further, as Figures 2-4 As shown in the drawing, the top of the circuit board 201 is further provided with the lens seat 205, the CMOS sensor 202 and the optical filter 203 are located in the lens seat 205, the lens seat 205 provides physical protection for the CMOS sensor 202 and the optical filter 203 and other important optical components, reduces the pixel damage, malfunction and other faults of the CMOS sensor 202 due to collision, prolongs the service life of the key components, reduces the maintenance frequency and cost, and ensures that the module operates stably for a long time.

[0045] Further, as Figures 2-4 As shown in the drawing, the top of the lens seat 205 is provided with the lens hole 206, the lens hole 206 is provided with the lens group 207, the lens hole 206 is used to provide space for the installation of the lens group 207, to ensure that the lens group 207 and the CMOS sensor 202, the optical filter 203 and other components work cooperatively.

[0046] Further, as Figure 4 As shown in the drawing, the bottom of the lens seat 205 is connected with the double-sided adhesive 204, the bottom of the double-sided adhesive 204 is connected with the top of the circuit board 201, the double-sided adhesive 204 is used to fix the circuit board 201 and the lens seat 205 together, effectively fills the small gap, fixes the lens seat 205 on the circuit board 201 firmly by virtue of strong and durable adhesive force, improves the stability of the connection between the lens seat 205 and the circuit board 201, and provides protection for the stable operation of the fingerprint identification system.

[0047] Further, as shown in Figure 1 The connector 208 is used to realize the connection between the application and other components, and the connector 208 is a key component for connecting the inside and the outside, which is very important. On the one hand, it builds a channel for signal transmission, so that the optical fingerprint module can quickly and stably exchange data with the main control board of the intelligent device, receive instructions and feedback the fingerprint recognition result in time, and realize the complete and smooth fingerprint unlocking process. On the other hand, it undertakes the power supply task to ensure that each component has sufficient power support when running and stably plays the function.

[0048] Further, the connection between the circuit board 201 and the shell 1 is glued to improve the sealing performance of the connection between the circuit board 201 and the shell 1. The glue bonding method is simple but effective, which tightly fills the tiny gap between the circuit board 201 and the shell 1, forms a strict sealing line, isolates impurities outside, ensures that the inside of the module is in a relatively clean and dry ideal environment, which not only effectively protects the normal work of electronic components, reduces the failure rate, prolongs the service life of the module, but also maintains the long-term stability of the module performance, provides continuous and reliable fingerprint identification service for users, and reduces the maintenance and replacement cost caused by environmental factors.

[0049] In use, the light passes through the protective lens 102 to the reflecting lens 3, and then the reflecting lens 3 refracts to the filter 203 and the CMOS sensor 202, so that the optical fingerprint identification is not limited by the installation direction of the module.

[0050] Obviously, the above-described embodiments are only some embodiments of the present application, not all embodiments. The preferred embodiments of the present application are given in the drawings, but do not limit the patent scope of the present application. The present application can be realized in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or equivalently replace some technical features. Any equivalent structure made by using the contents of the present application specification and drawings, directly or indirectly applied to other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A periscope optical fingerprint module, characterized in that, include: The housing (1) has a light input section on one side and an optical fingerprint component (2) on the housing (1). A reflective lens (3) is provided inside the housing (1). The reflective lens (3) is located between the optical fingerprint component (2) and the light input section. The reflective lens (3) is used to refract the light input by the light input section to realize the optical fingerprint recognition of the optical fingerprint component (2).

2. The periscope optical fingerprint module according to claim 1, characterized in that, The light input section includes a light input port (101) opened on one side of the housing (1), and a protective lens (102) is fixedly installed inside the light input port (101).

3. The periscope optical fingerprint module according to claim 2, characterized in that, The surface of the protective lens (102) is coated with an anti-fingerprint coating, which effectively prevents oil stains and fingerprints from being present during daily use and maintains the clarity of light input.

4. The periscope optical fingerprint module according to claim 1 or 2, characterized in that, The optical fingerprint assembly (2) includes a circuit board (201) mounted on the bottom of the housing (1), and a CMOS sensor (202) located inside the housing (1) is mounted on the top of the circuit board (201).

5. The periscope optical fingerprint module according to claim 4, characterized in that, A filter (203) is mounted on top of the CMOS sensor (202).

6. The periscope optical fingerprint module according to claim 5, characterized in that, The top of the circuit board (201) is also provided with a lens mount (205), and the CMOS sensor (202) and the filter (203) are both located inside the lens mount (205).

7. The periscope optical fingerprint module according to claim 6, characterized in that, The top of the lens mount (205) is provided with a lens hole (206), and a lens assembly (207) is provided in the lens hole (206).

8. The periscope optical fingerprint module according to claim 6 or 7, characterized in that, The bottom of the lens mount (205) is connected to a double-sided adhesive (204), and the bottom of the double-sided adhesive (204) is connected to the top of the circuit board (201).

9. The periscope optical fingerprint module according to claim 8, characterized in that, The bottom of the circuit board (201) is connected to a connector (208).

10. The periscope optical fingerprint module according to claim 9, characterized in that, The circuit board (201) is bonded to the housing (1) with glue.

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