Fingerprint module with temperature sensing function

Abstract

The utility model discloses a fingerprint module with temperature sensing, which comprises an FPC (flexible printed circuit), the FPC is provided with a fingerprint carrying end, a temperature sensing area and a host connection end, a fingerprint identification module is carried and connected on the fingerprint carrying end, a thermistor is mounted on the temperature sensing area, and the host connection end is connected with the temperature sensing area. The FPC is used for being connected with an external main control device through the host connection end to complete connection of the fingerprint identification module and the thermistor. According to the fingerprint module with the temperature sensing function, the thermistor is additionally arranged in the area, close to the fingerprint recognition module, of the FPC, and the temperature of the environment where the fingerprint module is located is sensed by monitoring the resistance change of the thermistor through the whole machine by connecting the thermistor with the main machine connecting end and the main control equipment; therefore, a user is prompted to judge whether further operation is needed or not, and the situation that the module is damaged easily due to the fact that the environment temperature is too high and cannot be sensed is avoided.

Description

Technical Field

[0001] This utility model relates to the field of fingerprint module technology, and in particular to a fingerprint module with temperature sensing. 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] For fingerprint modules used in certain special applications, in addition to the heat generated by the module itself, the environment in which the module is located will also experience temperature changes. When the external temperature is too high, it is necessary to stop the module from working in time to avoid damage to the module caused by the superposition of the module's own temperature and the high temperature of the external environment. Therefore, a fingerprint module with temperature sensing is proposed. Utility Model Content

[0004] Therefore, it is necessary to provide a fingerprint module with temperature sensing to address the above-mentioned technical problems. The thermistor is designed on the FPC for detecting ambient temperature and connected to an external main control device to achieve timely feedback of ambient temperature.

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

[0006] A temperature-sensing fingerprint module includes an FPC, which has a fingerprint mounting end, a temperature sensing area, and a host connection end. A fingerprint recognition module is mounted on the fingerprint mounting end, and a thermistor is installed on the temperature sensing area. The FPC is connected to an external main control device through the host connection end to complete the connection of the fingerprint recognition module and the thermistor.

[0007] Furthermore, the FPC includes a fingerprint mounting section, a temperature sensing section, and a circuit connection section;

[0008] The fingerprint mounting part, the temperature sensing part, and the circuit connection part are connected end to end to form the FPC.

[0009] Furthermore, the fingerprint mounting end is located at the end of the fingerprint mounting portion away from the temperature sensing portion, the temperature sensing area is located in the middle of the temperature sensing portion, and the host connection end is located at the end of the circuit connection portion away from the temperature sensing portion.

[0010] The fingerprint recognition module, thermistor, and host connection terminal are all located on the front of the FPC.

[0011] Furthermore, the thermistor has a first welding pin and a second welding pin, and the thermistor is connected to the host connection terminal through the first welding pin and the second welding pin to form a first interface pin and a second interface pin.

[0012] The host connection terminal, the first interface pin, and the second interface pin are all connected to an external main control device.

[0013] Furthermore, the FPC has a circuit cable for connecting the first soldering pin and the second soldering pin to the corresponding first interface pin and the second interface pin.

[0014] Furthermore, a reinforcing plate is provided on the back of the temperature sensing part.

[0015] Furthermore, a thermally conductive pad is fixed between the reinforcing plate and the temperature sensing part. Both ends of the reinforcing plate are bent outward and extend to both sides of the thermistor on the front of the temperature sensing part. After extension, both ends of the reinforcing plate have clearance grooves to avoid the thermistor.

[0016] Furthermore, the reinforcing plate is an aluminum sheet.

[0017] Furthermore, a PI reinforcing sheet is attached to the back of the circuit connection part corresponding to the area of ​​the host connection end.

[0018] Furthermore, the fingerprint recognition module includes a reinforcing steel sheet disposed on the back of the fingerprint mounting part, an LGA encapsulation block installed on the front of the fingerprint mounting part corresponding to the reinforcing steel sheet, and a protective end cap attached to the surface of the LGA encapsulation block.

[0019] The protective end cap also has a retainer for connecting to the front of the fingerprint mount.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The fingerprint module with temperature sensing provided by this utility model adds a thermistor in the area near the fingerprint recognition module on the FPC. Through the connection of the host terminal to the main control device, the whole machine monitors the resistance change of the thermistor to sense the temperature of the environment where the fingerprint module is located, thereby prompting the user to determine whether further operation is needed, and avoiding damage to the module caused by the external environment not being able to sense the excessively high ambient temperature.

[0022] The design of the reinforcing plate can form a support on the back of the temperature sensing part to ensure the stable installation of the thermistor mounted on the front and avoid the actual application being affected by the bending of the FPC in this area.

[0023] Meanwhile, by extending the reinforcing plate to the front of the thermistor, it can also provide synchronous support on the front, thereby improving the support strength of this area and further avoiding the problem that the thermistor connection is prone to warping due to FPC bending, which affects the connection stability.

[0024] Furthermore, the reinforcement plate is made of aluminum, which not only meets the requirements of support strength, but also, in conjunction with the design of the thermal pad, allows the ambient temperature on the back of the FPC to be transferred through the conductive pad to the aluminum reinforcement plate. This provides a more comprehensive feedback on the ambient temperature of the thermistor, improves the module's temperature sensing effect, and is more conducive to the protection of the fingerprint module. Attached Figure Description

[0025] Figure 1 A schematic diagram of the structure of the temperature-sensing fingerprint module provided by this utility model;

[0026] Figure 2 A schematic diagram of the FPC structure of the temperature-sensing fingerprint module provided by this utility model;

[0027] Figure 3 A side view of the temperature-sensing fingerprint module provided by this utility model;

[0028] Figure 4 A schematic diagram of the thermistor structure of the temperature-sensing fingerprint module provided by this utility model;

[0029] Figure 5 A schematic diagram of the back structure of the temperature-sensing fingerprint module provided by this utility model;

[0030] Figure 6 A side view of the temperature sensing part of the fingerprint module with temperature sensing provided by this utility model;

[0031] Figure 7 A schematic diagram of the clearance groove structure of the temperature-sensing fingerprint module provided by this utility model.

[0032] The markings in the diagram are explained as follows:

[0033] FPC1, fingerprint mounting terminal 11, temperature sensing area 12, host connection terminal 13, fingerprint recognition module 14, thermistor 15;

[0034] 140 Reinforcing steel sheet, 141 LGA package block, 142 Protective end cap, 143 Fixer;

[0035] First soldering pin 150, second soldering pin 151, first interface pin 152, second interface pin 153, circuit cable 154;

[0036] Fingerprint sensor unit 2;

[0037] Temperature sensing element 3, reinforcing plate 31, thermal pad 32, clearance groove 33;

[0038] Circuit connection part 4, PI reinforcement piece 41. Detailed Implementation

[0039] 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.

[0040] As described in the background section, for some special applications of fingerprint modules, in addition to the heat generated by the module itself, the environment in which the module is located will also experience temperature changes. When the external temperature is too high, it is necessary to stop the module from working in time to avoid damage to the module caused by the superposition of the module's own temperature and the high temperature of the external environment.

[0041] To solve this technical problem, this utility model provides a fingerprint module with temperature sensing, which is applied to fingerprint modules.

[0042] For details, please refer to Figures 1-7 The temperature-sensing fingerprint module specifically includes an FPC1, which has a fingerprint mounting end 11, a temperature sensing area 12, and a host connection end 13. A fingerprint recognition module 14 is mounted and connected on the fingerprint mounting end 11, and a thermistor 15 is installed on the temperature sensing area 12. The FPC1 is used to connect to an external main control device through the host connection end 13 to complete the connection of the fingerprint recognition module 14 and the thermistor 15.

[0043] The fingerprint module with temperature sensing provided by this utility model adds a thermistor 15 in the area near the fingerprint recognition module 14 on the FPC1. The thermistor 15 is connected to the main control device through the connection terminal 13 of the thermistor 15. The whole machine monitors the resistance change of the thermistor 15 to sense the temperature of the environment where the fingerprint module is located, thereby prompting the user to determine whether further operation is needed. This avoids damage to the module caused by the inability to sense excessively high ambient temperature.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] Example 1

[0048] Please refer to Figures 1-4 A fingerprint module with temperature sensing includes an FPC1, which has a fingerprint mounting end 11, a temperature sensing area 12, and a host connection end 13. A fingerprint recognition module 14 is mounted on the fingerprint mounting end 11 and a thermistor 15 is installed on the temperature sensing area 12. The FPC1 is used to connect to an external main control device through the host connection end 13 to complete the connection of the fingerprint recognition module 14 and the thermistor 15.

[0049] The FPC1 includes a fingerprint mounting part 2, a temperature sensing part 3, and a circuit connection part 4, wherein the fingerprint mounting part 2, the temperature sensing part 3, and the circuit connection part 4 are connected end to end to form the FPC1.

[0050] The fingerprint mounting end 11 is located at the end of the fingerprint mounting part 2 away from the temperature sensing part 3, the temperature sensing area 12 is located in the middle of the temperature sensing part 3, and the host connection end 13 is located at the end of the circuit connection part 4 away from the temperature sensing part 3.

[0051] The fingerprint recognition module 14, the thermistor 15, and the host connection terminal 13 are all located on the front of the FPC1.

[0052] In practical applications, the position of the temperature sensing area 12 can be designed according to the actual application scenario, and it can be set as close as possible to the area of ​​the fingerprint recognition module 14. In this way, when the ambient temperature around the fingerprint recognition module 14 changes, the thermistor 15 can sense it in time and feed it back to the terminal through the host connection terminal 13, so as to make a timely judgment.

[0053] Specifically, the thermistor 15 in this embodiment is an NTC thermistor. The thermistor 15 needs to be selected according to the overall operating temperature environment of the fingerprint recognition module 14. Since the resistance value of the NTC thermistor changes at different temperatures, that is, different temperatures correspond to different resistances, when the external main control device connected to the host terminal 13 detects the resistance value of the thermistor 14, the surface temperature of the area around the fingerprint recognition module 14 can be obtained by corresponding temperature and resistance curves. In this way, corresponding protection measures can be taken to avoid the fingerprint module being easily damaged because the temperature is too high and cannot be perceived by the outside world.

[0054] Example 2

[0055] The temperature-sensing fingerprint module provided in Embodiment 1 has been further optimized, specifically, as follows: Figure 4 As shown, the thermistor 15 has a first soldering pin 150 and a second soldering pin 151. The thermistor 15 is connected to the host connection terminal 13 through the first soldering pin 150 and the second soldering pin 151 and forms a first interface pin 152 and a second interface pin 153. The host connection terminal 13 and the first interface pin 152 and the second interface pin 153 are all connected to an external host control device.

[0056] The FPC1 has a circuit cable 154 for connecting the first soldering pin 150 and the second soldering pin 151 to the corresponding first interface pin 152 and second interface pin 153.

[0057] In practical applications, the host connection terminal 13 on FPC1 is connected to the external main control device. At this time, both the fingerprint recognition module 14 and the thermistor 15 are connected to the main control device.

[0058] Example 3

[0059] The temperature-sensing fingerprint module provided in Embodiment 1 or 2 is further optimized, such as... Figure 5 , Figure 6 and Figure 7 As shown, a reinforcing plate 31 is provided on the back of the temperature sensing part 3;

[0060] A thermal pad 32 is also fixed between the reinforcing plate 31 and the temperature sensing part 3. Both ends of the reinforcing plate 31 are bent outward and extended to both sides of the thermistor 15 on the front of the temperature sensing part 3. After extension, both ends of the reinforcing plate 31 have clearance grooves 33 to avoid the thermistor 15.

[0061] The reinforcing plate 31 is an aluminum sheet. Specifically, a heat-conducting pad 32 is first fixed to the back of the temperature sensing part 3, and then a reinforcing plate 31 is fixed to the back of the heat-conducting pad 32. The two ends of the reinforcing plate 31 extend outward and bend to the front of the temperature sensing part 3. Finally, the two ends of the reinforcing plate 31 contact and form a clearance groove 33 for the thermistor 15 to be cleared. The reinforcing plate 31 located on the front is also fixed to the front area of ​​the temperature sensing part 3.

[0062] By designing the reinforcing plate 31, a support can be formed on the back of the temperature sensing part 3 to ensure the stable installation of the thermistor 15 mounted on the front, and to avoid the actual application being affected by the bending of the FPC1 in this area. At the same time, by extending the reinforcing plate 31 to the front of the thermistor 15, synchronous support can also be provided on the front, thereby improving the support strength in this area and further avoiding the problem that the connection of the thermistor 15 is prone to warping due to the bending of the FPC1, which affects the connection stability.

[0063] By designing the thermal pad 32, the area between the reinforcing plate 31 and the temperature sensing part 3 can be filled. This allows the temperature on the FPC1 to be transferred to the reinforcing plate 31 in a timely manner through the thermal pad 32. The reinforcing plate 31 can also transfer the temperature of its surrounding area. Since the reinforcing plate 31 itself is made of aluminum with good thermal conductivity, the reinforcing plate 31 can quickly transfer heat to the front of the FPC1 so that the thermistor 15 can quickly sense it.

[0064] Meanwhile, since there is also a reinforcing plate 31 on the back of the temperature sensing unit 3, the thermistor 15 can monitor the temperature of the area on the front of the FPC1 while also detecting the temperature of the area on the back through the action of the reinforcing plate 31, thereby improving the temperature monitoring range of the thermistor 15.

[0065] Example 4

[0066] The temperature-sensing fingerprint module provided in Embodiment 3 has been further optimized, such as... Figure 3 As shown, a PI reinforcing sheet 41 is attached to the back of the circuit connection part 4 in the area corresponding to the host connection end 13. The PI reinforcing sheet 4 increases the overall rigidity of the circuit connection part 4, making it easier for it to connect to the external main control device.

[0067] The fingerprint recognition module 14 includes a reinforcing steel sheet 140 disposed on the back of the fingerprint mounting part 2, an LGA encapsulation block 141 mounted on the front of the fingerprint mounting part 2 corresponding to the reinforcing steel sheet 140, and a protective end cap 142 attached to the surface of the LGA encapsulation block 141. The protective end cap 142 is further provided with a retainer 143 for connecting to the front of the fingerprint mounting part 2.

[0068] 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.

[0069] 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 temperature sensing, characterized in that, The device includes an FPC (1), which has a fingerprint mounting end (11), a temperature sensing area (12) and a host connection end (13). A fingerprint recognition module (14) is mounted on the fingerprint mounting end (11) and a thermistor (15) is installed on the temperature sensing area (12). The FPC (1) is connected to an external main control device through the host connection end (13) to complete the connection of the fingerprint recognition module (14) and the thermistor (15).

2. The fingerprint module with temperature sensing according to claim 1, characterized in that, The FPC (1) includes a fingerprint mounting part (2), a temperature sensing part (3), and a circuit connection part (4). The fingerprint mounting part (2), the temperature sensing part (3) and the circuit connection part (4) are connected end to end to form the FPC (1).

3. The fingerprint module with temperature sensing according to claim 2, characterized in that, The fingerprint mounting end (11) is located at the end of the fingerprint mounting part (2) away from the temperature sensing part (3), the temperature sensing area (12) is located in the middle of the temperature sensing part (3), and the host connection end (13) is located at the end of the circuit connection part (4) away from the temperature sensing part (3). The fingerprint recognition module (14), the thermistor (15) and the host connection terminal (13) are all located on the front of the FPC (1).

4. The fingerprint module with temperature sensing according to claim 1, characterized in that, The thermistor (15) has a first soldering pin (150) and a second soldering pin (151). The thermistor (15) is connected to the host connection terminal (13) through the first soldering pin (150) and the second soldering pin (151) and forms a first interface pin (152) and a second interface pin (153). The host connection terminal (13), the first interface pin (152), and the second interface pin (153) are all connected to the external host control device.

5. The fingerprint module with temperature sensing according to claim 4, characterized in that, The FPC (1) has a circuit cable (154) for connecting the first solder pin (150) and the second solder pin (151) to the corresponding first interface pin (152) and second interface pin (153).

6. The fingerprint module with temperature sensing according to claim 2, characterized in that, A reinforcing plate (31) is provided on the back of the temperature sensing part (3).

7. The fingerprint module with temperature sensing according to claim 6, characterized in that, A heat-conducting pad (32) is also fixed between the reinforcing plate (31) and the temperature sensing part (3). Both ends of the reinforcing plate (31) are bent outward and extended to both sides of the thermistor (15) on the front of the temperature sensing part (3). After extension, both ends of the reinforcing plate (31) have clearance grooves (33) to avoid the thermistor (15).

8. The fingerprint module with temperature sensing according to claim 7, characterized in that, The reinforcing plate (31) is an aluminum sheet.

9. The fingerprint module with temperature sensing according to claim 2, characterized in that, A PI reinforcing sheet (41) is attached to the back of the circuit connection part (4) in the area corresponding to the host connection end (13).

10. The fingerprint module with temperature sensing according to claim 2, characterized in that, The fingerprint recognition module (14) includes a reinforcing steel sheet (140) disposed on the back of the fingerprint mounting part (2), an LGA encapsulation block (141) installed on the front of the fingerprint mounting part (2) corresponding to the reinforcing steel sheet (140), and a protective end cap (142) attached to the surface of the LGA encapsulation block (141). Among them, the surface of the protective end cap (142) is also provided with a retainer (143) for connecting with the front of the fingerprint mounting part (2).

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