A mobile phone shell with NFC lighting LED lamp function
By incorporating an NFC electromagnetic induction metal coil and a rectifier filter circuit inside the phone case to drive the LED light, the problem of the phone case's limited functionality is solved, achieving effective location indication at night and enhancing aesthetics.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 邹长健
- Filing Date
- 2025-08-04
- Publication Date
- 2026-06-19
AI Technical Summary
Most phone cases on the market have limited functionality, making it difficult to effectively indicate location using the phone screen's light when outdoors at night, and the screen light is weak and its changes are not obvious.
An NFC electromagnetic induction metal coil is placed inside the phone case. An alternating current is generated by an NFC reader, which is rectified and filtered to drive an LED light-emitting diode, thus achieving a gradual brightness effect.
It enhances the aesthetics and functionality of the phone case, increases the product's value, and effectively indicates location at night through LED lights.
Smart Images
Figure CN224385555U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mobile phone case technology, specifically a mobile phone case with NFC LED light-up function. Background Technology
[0002] A phone case is an accessory used to cover the outside of a mobile phone. Its main function is to protect the phone body and screen from wear, collisions, or drops, while also serving as a personalized decoration.
[0003] However, most phone cases on the market have limited functions, offering little beyond protecting the phone and decoration. For example, when outdoors at night, people often use the light emitted from the phone screen to indicate their location. However, due to the weak and unclear screen light, it is difficult to discern the location from a distance. Therefore, the value of most phone cases needs to be improved.
[0004] To address this, a phone case with NFC-enabled LED lighting is proposed. Summary of the Invention
[0005] The purpose of this utility model is to enhance the overall aesthetics of the phone case and increase its value. This application provides a phone case with NFC LED lighting function.
[0006] The technical solution adopted in this utility model is as follows:
[0007] A phone case with NFC-enabled LED lighting function includes a phone case body. The upper inner sidewall of the phone case body has a pre-drilled opening area for a camera. A metal coil, which can be electromagnetically induced by NFC, is fixedly adhered to the upper inner sidewall of the phone case body near the pre-drilled opening area. An LED light-emitting diode is fixedly mounted on the outer surface of the phone case body along the pre-drilled opening area for the camera. The output terminal of the metal coil is electrically connected to diodes D1 and D2. The output terminals of diodes D1 and D2 are electrically connected to capacitor C1. The anode of the LED light-emitting diode is electrically connected to capacitor C2 through a current-limiting resistor.
[0008] Furthermore, the D1 diode and the D2 diode form a bridge rectifier.
[0009] Furthermore, the output terminals of diodes D1 and D2 are electrically connected to the positive terminal of capacitor C1, and the negative terminal of capacitor C1 is grounded.
[0010] Furthermore, the negative terminal of the LED is grounded.
[0011] Furthermore, the C2 capacitor, the C1 capacitor, the D1 diode, and the D2 diode are mounted on the inner sidewall of the phone case body.
[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:
[0013] In this invention, when the phone case is installed on the back of the phone, the NFC reader can be brought close to the metal coil inside the phone case. The magnetic field of the NFC reader acts on the metal coil, creating a transformer-like effect that generates alternating current, providing initial power to the circuit. The alternating current output from the metal coil is rectified into direct current by diodes D1 and D2. Meanwhile, capacitor C1 is connected in parallel between the rectified output and ground to filter out high-frequency noise. Capacitor C2 further stabilizes the voltage, preventing the LED from flickering. The filtered direct current drives the LED through a current-limiting resistor. Simultaneously, the charging and discharging characteristics of capacitor C2 adjust the brightness gradient effect. This combination of structures enhances the overall aesthetics of the phone case and increases the product's value. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 In this utility model Figure 1 Enlarged view of point A;
[0016] Figure 3 This is a schematic diagram of the circuit connection in this utility model.
[0017] The markings in the diagram are: 1-phone case body, 2-camera pre-reserved opening area, 3-metal coil, 4-C2 capacitor, 5-C1 capacitor, 6-D1 diode, 7-D2 diode, 8-LED light-emitting diode. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0019] Reference Figures 1-3A mobile phone case with NFC-enabled LED lighting function includes a mobile phone case body 1. The upper inner side wall of the mobile phone case body 1 has a camera pre-reserved opening area 2. A metal coil 3 that can be electromagnetically induced by NFC is fixedly adhered to the upper inner side wall of the mobile phone case body 1 near the camera pre-reserved opening area 2. Specifically, when the mobile phone case body 1 is installed on the back of the mobile phone, when the mobile phone NFC reader is brought close to the metal coil 3 inside the mobile phone case body 1, its magnetic field acts on the metal coil 3 inside the mobile phone case body 1, forming a transformer-like effect, generating alternating current, and providing initial power to the circuit.
[0020] Reference Figures 1-3 An LED light-emitting diode 8 is fixedly installed on the outer surface of the phone case body 1 along the reserved opening area 2 of the camera. The output terminal of the metal coil 3 is electrically connected to diodes D1 (6) and D2 (7), forming a bridge rectifier. The output terminals of diodes D1 (6) and D2 (7) are electrically connected to capacitor C1 (5), and the output terminals of diodes D1 (6) and D2 (7) are electrically connected to the positive terminal of capacitor C1 (5). The negative terminal of capacitor C1 (5) is grounded. The anode of the LED light-emitting diode 8 is electrically connected to capacitor C2 (4) through a current-limiting resistor. Capacitor C2 (4), capacitor C1 (5), diodes D1 (6), and diode D2 (7) are installed on the phone case body. On the inner wall of the casing 1, the negative terminal of the LED light-emitting diode 8 is grounded. Specifically, the AC power output from the metal coil 3 is rectified into DC power by diodes D1 (6) and D2 (7). At this time, capacitor C1 (5) is connected in parallel between the rectified output terminal and ground to filter out high-frequency noise. Capacitor C2 (4) can further stabilize the voltage and prevent the LED light-emitting diode 8 from flickering. The filtered DC power drives the LED light-emitting diode 8 through a current-limiting resistor. At the same time, the charging and discharging characteristics of capacitor C2 (4) can adjust the brightness gradient effect. With the cooperation of the above structure, the NFC LED light can enhance the overall aesthetics of the phone casing 1 during use and increase the value of the product.
[0021] The implementation principle of the mobile phone case embodiment with NFC LED lighting function in this application is as follows:
[0022] When using the phone case body 1, it can be installed on the back of the phone. When the phone's NFC reader is brought close to the metal coil 3 inside the phone case body 1, its magnetic field acts on the metal coil 3 inside the phone case body 1, forming a transformer-like effect, generating alternating current to provide initial power to the circuit. The alternating current output by the metal coil 3 is rectified into direct current by diodes D1 6 and D2 7. At this time, capacitor C1 5 is connected in parallel between the rectified output terminal and ground, which can filter out high-frequency noise. Capacitor C2 4 can further stabilize the voltage and prevent the LED light-emitting diode 8 from flickering. The filtered direct current drives the LED light-emitting diode 8 through the current-limiting resistor. At the same time, the charging and discharging characteristics of capacitor C2 4 can adjust the brightness gradient effect. With the combination of the above structure, the NFC-activated LED light can enhance the overall aesthetics of the phone case body 1 during use and increase the value of the product.
[0023] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A mobile phone case with NFC LED lighting function, comprising a mobile phone case body (1), characterized in that: The upper inner wall of the phone case body (1) is provided with a camera reserved opening area (2). A metal coil (3) that can be electromagnetically induced by NFC is fixedly attached to the upper inner wall of the phone case body (1) near the camera reserved opening area (2). An LED light-emitting diode (8) is fixedly installed on the outer surface of the phone case body (1) along the camera reserved opening area (2). The output end of the metal coil (3) is electrically connected to a D1 diode (6) and a D2 diode (7). The output ends of the D1 diode (6) and the D2 diode (7) are electrically connected to a C1 capacitor (5). The anode of the LED light-emitting diode (8) is electrically connected to a C2 capacitor (4) through a current-limiting resistor.
2. A phone case with NFC LED lighting function as described in claim 1, characterized in that: The D1 diode (6) and the D2 diode (7) form a bridge rectifier.
3. A phone case with NFC LED lighting function as described in claim 1, characterized in that: The output terminals of diodes D1 (6) and D2 (7) are electrically connected to the positive terminal of capacitor C1 (5), and the negative terminal of capacitor C1 (5) is grounded.
4. A phone case with NFC LED lighting function as described in claim 1, characterized in that: The negative terminal of the LED (8) is grounded.
5. A phone case with NFC LED lighting function as described in claim 1, characterized in that: The C2 capacitor (4), the C1 capacitor (5), the D1 diode (6), and the D2 diode (7) are mounted on the inner side wall of the phone case body (1).