Eyewear Wireless Interface Switching to Cut Standby Current
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Solution Overview
Problem
Existing eyewear devices with wireless connectivity face inefficiencies in power consumption, particularly when switching between high-speed and low-speed communication modes, leading to unnecessary standby current draw.
Innovation Solution
Implementing a high-speed wireless transceiver with a processor that selectively enables a high-speed USB interface for high-speed communications and a low-speed UART interface for low-speed communications, disabling the high-speed interface when not needed to conserve current, and using a USB hub to control the interface switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the high-speed USB interface is continuously enabled for wireless communications, then communication speed is improved, but power consumption increases due to unnecessary standby current
Solution Approach 1:
The system dynamically switches between high-speed USB interface and low-speed UART interface based on communication requirements. The high-speed interface is enabled only when high data transfer rates are needed, and switched to low-speed mode for routine communications, optimizing the balance between speed and power consumption
Solution Approach 2:
The system employs periodic switching between communication modes rather than continuous operation. The high-speed interface is activated periodically only when necessary for high-speed data transfers, while the low-speed interface handles periodic routine communications, reducing overall power consumption while maintaining communication effectiveness
2Use of energy by moving object
If the high-speed USB interface is disabled to save current, then power consumption is reduced, but communication speed decreases when high-speed transfers are needed
Solution Approach 1:
A USB hub acts as an intermediary device that manages the switching between high-speed and low-speed interfaces. The hub coordinates interface selection based on communication needs, ensuring high-speed capability is available when required while maintaining power efficiency during normal operation
3Adaptability or versatility
If both high-speed and low-speed interfaces are maintained active, then communication versatility is improved, but device complexity increases
Solution Approach 1:
The system implements multi-functionality by using a single USB transceiver that can operate in both high-speed and low-speed modes. This universal approach provides communication versatility across different speed requirements while avoiding the complexity of maintaining completely separate interface hardware systems
Data Source
AI summary
Eyewear having a high-speed wireless transceiver, including a processor having a high-speed interface for communicating high-speed communications and a low-speed interface for communicating low-speed communications. The high-speed interface is disabled to have no standby current and only the low-speed interface is used when only low-speed communications are needed to save current. When communications are received via the high-speed wireless transceiver, only the low-speed interface is initially used, and the high-power interface is later used if necessary. The high-speed interface can be a high-speed universal serial bus (USB) interface, and the low-speed interface can be a universal asynchronous receiver-transmitter (UART) interface. A USB hub is controlled by the processor to selectively enable the USB interface.