Fingerprint module with photovoltaic energy storage

Abstract

The utility model discloses a kind of fingerprint module with photovoltaic energy storage, glass cover plate, it is used to contact user finger;Photovoltaic layer, it is located in the inside of the glass cover plate, under photovoltaic effect can make photovoltaic layer convert solar energy into direct-current electric energy;FPC circuit, it is electrically connected with the photovoltaic layer;Energy storage battery, it is connected with the FPC circuit by fingerprint FPC, for storing the electric energy generated in the photovoltaic layer;Fingerprint identification chip, it is located in the inside of the photovoltaic layer, for collecting and processing the fingerprint signal.The utility model provides a kind of fingerprint module with photovoltaic energy storage, the photovoltaic layer is laid in the inside of conventional glass cover plate, so when it is applied to outdoor and used, the sunlight of contact can be converted electric energy and stored in energy storage battery, so as to improve the endurance time of the overall fingerprint module, reduce the frequency of battery replacement, and then the problem that cannot be unlocked application due to battery is reduced.

Description

Technical Field

[0001] This utility model relates to the field of fingerprint module technology, and in particular to a fingerprint module with photovoltaic energy storage. Background Technology

[0002] The fingerprint module is the core component of a fingerprint lock. It is installed on devices such as fingerprint access control systems or hard drives and is used to collect and recognize fingerprints. The fingerprint module mainly consists of a fingerprint acquisition module, a fingerprint recognition module, and extended function modules (such as a lock driver module).

[0003] Currently used fingerprint modules require external power supply / battery. Since the energy storage capacity of the battery is limited, it needs to be replaced when the external battery runs out of power. This is problematic when the module is installed outdoors, as the battery may not be able to be replaced in time if it runs out of power, which will render the fingerprint module unusable and cause inconvenience to the user. Therefore, a fingerprint module with photovoltaic energy storage is proposed. Utility Model Content

[0004] Therefore, it is necessary to address the aforementioned technical issues by providing a fingerprint module with photovoltaic energy storage. This module incorporates a photovoltaic layer design on top of a conventional fingerprint module, allowing it to collect and convert solar energy into electrical energy for storage when exposed to sunlight during outdoor applications. This improves overall battery life and reduces the frequency of battery replacements.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A fingerprint module with photovoltaic energy storage includes:

[0007] A glass cover, used to contact the user's fingers;

[0008] A photovoltaic layer, located on the inner side of the glass cover, can convert solar energy into direct current energy through photovoltaic effects.

[0009] The FPC circuit is electrically connected to the photovoltaic layer;

[0010] An energy storage battery, which is connected to the FPC circuit via a fingerprint FPC, is used to store the electrical energy generated in the photovoltaic layer;

[0011] A fingerprint recognition chip, located inside the photovoltaic layer, is used to collect and process the fingerprint signal.

[0012] Furthermore, the photovoltaic layer is evenly distributed in a grid pattern on the inner side of the glass cover plate;

[0013] The capacitance value generated between the finger and the fingerprint recognition chip varies within the tolerance threshold of fingerprint recognition.

[0014] Furthermore, the semiconductor material of the photovoltaic layer is selected from any one of monocrystalline silicon, polycrystalline silicon, amorphous silicon, and cadmium telluride.

[0015] Furthermore, the outer side of the photovoltaic layer is adapted to the glass cover plate.

[0016] Furthermore, the FPC circuit includes a charge management module for stabilizing the output voltage of the photovoltaic layer and controlling the charging current of the energy storage battery.

[0017] Furthermore, the photovoltaic layer includes at least a transparent front electrode layer, a photoelectric conversion semiconductor layer, and a back electrode layer stacked on top of each other, with the back electrode layer directly disposed on the inner surface of the glass cover plate.

[0018] Furthermore, one side of the fingerprint FPC has a fingerprint mounting area, and the fingerprint recognition chip is mounted and fixed on the fingerprint mounting area.

[0019] Furthermore, a protective ring is fastened to the surface of the glass cover, and a fixing platform extends from the inner edge of the protective ring. The fixing platform is fixed to the surface of the fingerprint FPC by optical adhesive, so that the glass cover, photovoltaic layer and fingerprint recognition chip are all placed inside the protective ring. The surface of the protective ring is provided with an identification groove.

[0020] Furthermore, a reinforcing steel sheet is fixed on the other side of the fingerprint FPC at the position corresponding to the fingerprint mounting area.

[0021] Furthermore, one end of the fingerprint FPC has a gold finger for connecting to an external master control device.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The fingerprint module with photovoltaic energy storage provided by this utility model lays a photovoltaic layer on the inside of a conventional glass cover. When used outdoors, it can convert sunlight into electrical energy and store it in the energy storage battery. Compared with conventional fingerprint modules with a single fixed-capacity battery, this can improve the overall battery life of the fingerprint module, reduce the frequency of battery replacement, and thus reduce the problem of being unable to unlock the application due to a dead battery. Attached Figure Description

[0024] Figure 1 A schematic diagram of the structure of the fingerprint module with photovoltaic energy storage provided by this utility model;

[0025] Figure 2 A side view of the fingerprint module with photovoltaic energy storage provided by this utility model;

[0026] Figure 3 The fingerprint module with photovoltaic energy storage provided by this utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0027] Figure 4 A schematic diagram of the photovoltaic layer structure of the fingerprint module with photovoltaic energy storage provided by this utility model;

[0028] Figure 5 A schematic diagram of the back structure of the fingerprint module with photovoltaic energy storage provided by this utility model;

[0029] Figure 6 A schematic diagram of the system structure of the fingerprint module with photovoltaic energy storage provided by this utility model;

[0030] Figure 7 A schematic diagram of the photovoltaic layer structure of the fingerprint module with photovoltaic energy storage provided by this utility model.

[0031] The markings in the diagram are explained as follows:

[0032] 1. Glass cover plate; 11. Protective ring; 12. Fixing platform; 13. Gold finger; 14. Identification groove;

[0033] Photovoltaic layer 2, transparent front electrode layer 21, photoelectric conversion semiconductor layer 22, back electrode layer 23;

[0034] FPC circuit 3, charge management module 31;

[0035] Energy storage battery 4;

[0036] 5. Fingerprint recognition chip; 51. Fingerprint mounting area; 52. Reinforcing steel sheet;

[0037] Fingerprint FPC6. Detailed Implementation

[0038] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0039] As described in the background section, currently used fingerprint modules require an external power source / battery for power. Since the energy storage capacity of the battery is limited, it needs to be replaced when the external battery runs out of power. In outdoor applications, if the battery runs out of power, it may not be able to be replaced in time, which will render the fingerprint module unusable and cause inconvenience to the user.

[0040] To solve this technical problem, this utility model provides a fingerprint module with photovoltaic energy storage, which is applied to fingerprint modules.

[0041] For details, please refer to Figures 1-6 As shown, the fingerprint module with photovoltaic energy storage specifically includes:

[0042] Glass cover 1, which is used to contact the user's finger;

[0043] The photovoltaic layer 2 is located on the inner side of the glass cover plate 1. Under the photovoltaic effect, the photovoltaic layer 2 can convert solar energy into direct current power.

[0044] FPC circuit 3 is electrically connected to the photovoltaic layer 2;

[0045] The energy storage battery 4 is connected to the FPC circuit 3 via the fingerprint FPC 6 and is used to store the electrical energy generated in the photovoltaic layer 2.

[0046] The fingerprint recognition chip 5 is located inside the photovoltaic layer 2 and is used to collect and process the fingerprint signal.

[0047] The fingerprint module with photovoltaic energy storage provided by this utility model lays a photovoltaic layer 2 on the inside of the conventional glass cover plate 1. When it is used outdoors, it can convert the sunlight it comes into contact with into electrical energy and store it in the energy storage battery 4, thereby improving the overall battery life of the fingerprint module, reducing the frequency of battery replacement, and thus reducing the problem of being unable to unlock the application due to the battery running out of power.

[0048] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0049] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0050] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0051] Example 1

[0052] Please refer to Figures 1-7 As shown, a fingerprint module with photovoltaic energy storage includes a glass cover 1 for contacting the user's finger.

[0053] The photovoltaic layer 2 is located on the inner side of the glass cover plate 1. Under the photovoltaic effect, the photovoltaic layer 2 can convert solar energy into direct current power.

[0054] FPC circuit 3 is electrically connected to the photovoltaic layer 2;

[0055] The energy storage battery 4 is connected to the FPC circuit 3 via the fingerprint FPC 6 and is used to store the electrical energy generated in the photovoltaic layer 2.

[0056] The fingerprint recognition chip 5 is located inside the photovoltaic layer 2 and is used to collect and process the fingerprint signal;

[0057] In this embodiment, a photovoltaic layer 2 is added to the conventional fingerprint module and attached between the glass cover plate 1 and the fingerprint recognition chip 5. Since the glass cover plate 1 is made of transparent and light-transmitting material, it will not affect the light-transmitting effect of the photovoltaic layer 2, thus ensuring the light energy conversion efficiency. At the same time, the glass cover plate 1 set on the outside can also form a protection for the photovoltaic layer 2, ensuring that it will not come into contact with the outside during application and will not easily cause scratches or damage.

[0058] Specifically, when the photovoltaic layer 2 is used outdoors, after it comes into contact with natural sunlight, it can convert solar energy into electrical energy and store it in the energy storage battery 4. This replenishes the battery power in the energy storage battery 4. As the application time increases, compared with conventional fingerprint modules with a single fixed-capacity battery, the overall battery life of the fingerprint module can be effectively improved. This reduces the number of times the battery needs to be replaced, and thus reduces the problem of the fingerprint module being affected by the inability to replace the battery in time.

[0059] Example 2

[0060] The fingerprint module with photovoltaic energy storage provided in Example 1 has been further optimized, specifically, as follows: Figure 4 As shown, the photovoltaic layer 2 is evenly distributed in a grid pattern on the inner side of the glass cover plate 1;

[0061] The capacitance value variation between the finger and the fingerprint recognition chip 5 is kept within the tolerance threshold of fingerprint recognition.

[0062] It should be noted that since a photovoltaic layer is laid on the inner side of the glass cover plate 1, the photovoltaic layer 2 is required to be set in a grid-like layout. For example, the photovoltaic layer is arranged in a grid-like pattern with equal proportions in the form of grid bars (the width of the grid bars is ≤5μm). This uniformity is formed on the glass cover plate 1. This way, the function of the photovoltaic layer 2 in collecting light and converting it into electrical energy must be satisfied, while not affecting the light transmission and the fingerprint unlocking application of the fingerprint module.

[0063] Therefore, it is necessary to meet both optical and electrical requirements. The electrical requirement refers to the fact that a conventional fingerprint sensor can tolerate baseline capacitance fluctuations within ±5%. For example, if the original capacitance of a sensor is 100fF, and after adding a photovoltaic layer it is maintained in the range of 95-105fF, it will not affect recognition with software calibration. Therefore, in this embodiment, it is necessary to control the range of capacitance value variation between the finger and the fingerprint recognition chip 5 within the tolerance threshold of fingerprint recognition. This way, the requirements of fingerprint recognition can be met without affecting the light-gathering characteristics of the photovoltaic layer itself.

[0064] The optical requirements of the photovoltaic layer 2 in this embodiment refer to its need for a certain light transmittance to allow ambient light to pass through and generate electricity, while not affecting the fingerprint sensor's reception of light reflected from the finger. Since the semiconductor material of the photovoltaic layer 2 in this embodiment is selected from any one of monocrystalline silicon, polycrystalline silicon, amorphous silicon, and cadmium telluride, the photovoltaic effect of the semiconductor material converts solar energy into direct current (DC) electricity, which is then led out through electrodes and connected to the FPC circuit. Because the specific methods and parameters for setting the optical and electrical requirements of the photovoltaic layer 2 are well-known technical knowledge to those skilled in the art, they are not further elaborated in this embodiment.

[0065] Furthermore, the outer side of the photovoltaic layer 2 is adapted to the glass cover plate 1;

[0066] The photovoltaic layer 2 includes at least a transparent front electrode layer 21, a photoelectric conversion semiconductor layer 22 and a back electrode layer 23 stacked on each other. The back electrode layer 23 is directly disposed on the inner surface of the glass cover plate 1. In this embodiment, the photoelectric conversion semiconductor layer 22 is preferably amorphous silicon (a-Si), but it can also be other semiconductor materials.

[0067] Specifically, the back electrode layer 23 is first deposited on the inner surface of the glass cover plate 1, then the photoelectric conversion semiconductor layer 22 is deposited, and finally the transparent front electrode layer 21 is deposited. Then the back electrode layer 23 and the transparent front electrode layer 21 are connected to the positive and negative terminals in the FPC circuit.

[0068] Furthermore, an anti-reflective film (such as MgF2) can be deposited on the surface of the glass cover plate 1 to increase the light transmittance by 3-5%.

[0069] Example 3

[0070] Further optimizations can be made to the fingerprint module with photovoltaic energy storage provided in Embodiment 1 or 2, such as... Figure 6 As shown, the FPC circuit 3 includes a charge management module 31, which is used to stabilize the output voltage of the photovoltaic layer 2 and control the charging current of the energy storage battery 4; it can effectively manage the charging and discharging of the energy storage battery 4, and at the same time regulate the battery voltage during charging and discharging to ensure the stability of the energy storage battery under application conditions.

[0071] Example 4

[0072] The fingerprint module with photovoltaic energy storage provided in Example 3 has been further optimized, such as... Figure 3 As shown, the fingerprint FPC5 has a fingerprint mounting area 51 on one side, and the fingerprint recognition chip 5 is mounted and fixed on the fingerprint mounting area 51;

[0073] The surface of the glass cover plate 1 is also fastened with a protective ring 11. A fixing platform 12 extends from the inner edge of the protective ring 11. The fixing platform 12 is fixed to the surface of the fingerprint FPC 5 by optical adhesive, so that the glass cover plate 1, the photovoltaic layer 2 and the fingerprint recognition chip 5 are all placed inside the protective ring 11. The surface of the protective ring 11 is provided with a recognition groove 14.

[0074] A reinforcing steel sheet 52 is fixed on the other side of the fingerprint FPC5 at the position corresponding to the fingerprint mounting area 51. In this embodiment, by adopting the design of the reinforcing steel sheet 52, the fingerprint mounting area 51 can be supported in terms of hardness. In this way, after the fingerprint recognition chip 5 is mounted, its application on the fingerprint FPC5 can be guaranteed to be stable.

[0075] One end of the fingerprint FPC5 has a gold finger 13 for connecting to an external main control device;

[0076] In this embodiment, a photovoltaic layer 2 is added, and the photovoltaic layer 2 is connected to the fingerprint FPC 6 via an FPC circuit 3. Therefore, the fingerprint FPC 6 has conductive areas arranged on it for connecting to the FPC circuit 3. These conductive areas are independently separated from the areas of the fingerprint FPC 6 itself used for connecting to the fingerprint recognition chip 5, and ultimately all lead out to the gold finger 13. In this way, when the gold finger 13 is plugged into the external main control board, the fingerprint module FPC 6 itself can be connected to the fingerprint recognition chip 5, and at the same time, the connection between the FPC circuit 3 and the photovoltaic layer 2 can also be achieved.

[0077] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0078] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model 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 specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A fingerprint module with photovoltaic energy storage, characterized in that, It includes: A glass cover (1) is used to contact the user's finger; The photovoltaic layer (2) is located on the inner side of the glass cover plate (1). Under the photovoltaic effect, the photovoltaic layer (2) can convert solar energy into DC power. The FPC circuit (3) is electrically connected to the photovoltaic layer (2); The energy storage battery (4) is connected to the FPC circuit (3) via the fingerprint FPC (6) and is used to store the electrical energy generated in the photovoltaic layer (2); A fingerprint recognition chip (5) is located inside the photovoltaic layer (2) and is used to collect and process the fingerprint signal.

2. The fingerprint module with photovoltaic energy storage according to claim 1, characterized in that, The photovoltaic layer (2) is evenly distributed in a grid pattern on the inner side of the glass cover plate (1); The capacitance value generated between the finger and the fingerprint recognition chip (5) varies within the tolerance threshold of fingerprint recognition.

3. The fingerprint module with photovoltaic energy storage according to claim 2, characterized in that, The semiconductor material of the photovoltaic layer (2) is selected from any one of monocrystalline silicon, polycrystalline silicon, amorphous silicon and cadmium telluride.

4. The fingerprint module with photovoltaic energy storage according to claim 1, characterized in that, The outer shape of the photovoltaic layer (2) is adapted to the glass cover plate (1).

5. The fingerprint module with photovoltaic energy storage according to claim 1, characterized in that, The FPC circuit (3) includes a charge management module (31) for stabilizing the output voltage of the photovoltaic layer (2) and controlling the charging current of the energy storage battery (4).

6. The fingerprint module with photovoltaic energy storage according to claim 3, characterized in that, The photovoltaic layer (2) includes at least a transparent front electrode layer (21), a photoelectric conversion semiconductor layer (22) and a back electrode layer (23) stacked on each other, with the back electrode layer (23) directly disposed on the inner surface of the glass cover plate (1).

7. The fingerprint module with photovoltaic energy storage according to claim 1, characterized in that, The fingerprint FPC (6) has a fingerprint mounting area (51) on one side, and the fingerprint recognition chip (5) is mounted and fixed on the fingerprint mounting area (51). 8.The fingerprint module with photovoltaic energy storage of claim 1, wherein, The surface of the glass cover (1) is also fastened with a protective ring (11). A fixing platform (12) extends from the inner edge of the protective ring (11). The fixing platform (12) is fixed to the surface of the fingerprint FPC (6) by optical adhesive, so that the glass cover (1), the photovoltaic layer (2) and the fingerprint recognition chip (5) are all placed inside the protective ring (11). The surface of the protective ring (11) is provided with an identification groove (14). 9.The fingerprint module with photovoltaic energy storage of claim 7, wherein, A reinforcing steel sheet (52) is fixed on the other side of the fingerprint FPC (6) at the position corresponding to the fingerprint mounting area (51).

10. The fingerprint module with photovoltaic energy storage according to claim 1, characterized in that, One end of the fingerprint FPC (6) has a gold finger (13) for connecting to an external master control device.

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