NFC-Powered Phone Cover Display with Periodic Charging
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Solution Overview
Problem
Cell phone manufacturers face challenges in creating unique and personalized products due to the trend towards thin rectangular housings that limit aesthetic differentiation, and users rarely change phone covers due to replacement costs.
Innovation Solution
A cover for mobile phones equipped with a housing, a display device, and a near field communication (NFC) circuit that generates power through inductive coupling to display data, allowing for dynamic customization of the phone's appearance by mirroring changes made on the phone's display and operating independently after power cessation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a display device is continuously powered to show dynamic content on the phone cover, then the personalization capability is improved, but the energy consumption increases
Solution Approach 1:
The NFC circuit is activated periodically rather than continuously - it wakes up at predetermined intervals to receive data from the mobile device, processes it through the charge pump circuit, and updates the display. This periodic operation allows the cover to maintain dynamic personalization capability while significantly reducing energy consumption compared to continuous operation.
Solution Approach 2:
The cover incorporates an internal rechargeable battery and charge pump circuit that autonomously manage power storage and distribution. The system self-regulates by charging the battery when the NFC circuit receives power from the mobile device, then using stored energy to power the display during intervals when the NFC circuit is dormant, eliminating the need for continuous external power.
2Productivity
If the NFC circuit operates continuously to power the display device, then the data transmission capability is improved, but the battery life of the mobile device decreases
Solution Approach 1:
The NFC circuit operates in periodic cycles rather than continuously. It activates at predetermined intervals to establish data transmission with the mobile device, transfers the necessary data, then enters a low-power state. This periodic operation maintains full data transmission capability when needed while dramatically reducing the duration of NFC circuit operation, thereby conserving mobile device battery life.
Solution Approach 2:
The cover pre-charges its internal battery during periods when the NFC circuit is active and receiving power from the mobile device. This preliminary charging action ensures that sufficient energy is stored before the NFC circuit needs to transmit data or before the next operational cycle begins, eliminating the need for continuous power draw from the mobile device battery.
3Duration of action of stationary object
If a rechargeable battery is added to the cover to extend display operation, then the duration of display operation is improved, but the device complexity increases
Solution Approach 1:
The rechargeable battery serves multiple functions within the cover system: it stores energy for extending display operation, powers the NFC circuit during data transmission, and works in conjunction with the charge pump circuit to regulate power distribution. By making the battery a multi-functional component that supports multiple subsystems, the design extends operational duration without proportionally increasing complexity.
Solution Approach 2:
The patent combines the rechargeable battery, charge pump circuit, NFC circuit, and display into an integrated system where components work together synergistically. The battery is merged with the power management subsystem, and the NFC circuit is integrated with the data processing functions. This consolidation allows the system to achieve extended operational duration while minimizing the increase in overall device complexity through functional integration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables users to easily and dynamically customize their phone's external appearance by displaying graphical images, books, or other indicia on the cover's display, retaining information without continuous power, thus reducing NFC circuit usage and conserving battery life.
Implementation Method 1
The NFC circuit is configured to generate power through inductive coupling to another NFC circuit within the user equipment
Implementation Method 2
The charging circuit may be configured to charge the rechargeable power supply using magnetic fields received from the other NFC circuit of the user equipment
Data Source
AI summary
A cover for a user equipment, such as a cell phone, includes a housing, a display device, and a near field communication (NFC) circuit. The housing is attachable to the user equipment, and while attached covers a back surface of the user equipment. The display device is at least partially disposed within the housing. The NFC circuit that is configured to generate power through inductive coupling to another NFC circuit within the user equipment, the NFC circuit configured to operate using the power to receive data from the other NFC circuit within the user equipment, and to supply the power and the data to the display device to cause the data to be displayed for viewing by a user. Related user equipment, methods, and computer program products are disclosed.