Eyewear USB-UART Control for Low-Power Wireless Communications
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Solution Overview
Problem
Existing eyewear devices with wireless connectivity face inefficiencies in power consumption, particularly when transitioning between high-speed and low-speed communication modes, leading to unnecessary standby current draw.
Innovation Solution
Implementing a high-speed wireless transceiver with a high-speed USB interface that is disabled during low-speed communications and a low-speed UART interface, controlled by a processor to manage power usage, and utilizing a USB hub to selectively enable the high-speed interface when necessary.
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 draw
Solution Approach 1:
The patent applies dynamics by making the USB interface configuration changeable over time. The system dynamically switches between high-speed and low-speed modes based on communication requirements. The processor monitors communication needs and adjusts the interface speed accordingly, enabling the system to adapt its power consumption characteristics to match actual operational demands rather than remaining statically configured at high speed.
Solution Approach 2:
The patent changes the operational parameters of the USB interface by switching between high-speed mode (5 Gb/s) and low-speed mode (300 Kb/s). This parameter change allows the system to optimize power consumption by operating at lower speeds when high data rates are not required, while maintaining the capability to switch to high-speed mode when performance demands increase.
2Use of energy by moving object
If the high-speed USB interface is disabled during low-speed communications, then power consumption is reduced, but communication capability is worsened when high-speed transmission is needed
Solution Approach 1:
The system performs preliminary actions by pre-configuring both high-speed and low-speed communication interfaces and maintaining readiness to switch between them. The processor monitors communication requirements in advance and prepares the appropriate interface mode before actual data transmission begins, ensuring that the system can immediately transition to high-speed mode when needed without loss of communication capability.
Solution Approach 2:
The patent makes the communication interface dynamically adaptable by implementing automatic switching between high-speed and low-speed modes. The system continuously assesses communication needs and adjusts its operational state accordingly, ensuring that full communication capability is maintained while optimizing power consumption based on actual requirements.
3Use of energy by moving object
If a USB hub is added to selectively enable the high-speed interface, then power consumption is optimized, but device complexity increases
Solution Approach 1:
The system implements self-service by automatically managing the switching between high-speed and low-speed USB interfaces without requiring external control or complex hub configuration. The processor autonomously monitors communication requirements and activates the appropriate interface mode based on detected needs, eliminating the requirement for manual intervention or complex external control mechanisms.
Solution Approach 2:
The patent extracts the intelligence for interface management directly into the processor, removing the need for external USB hub control logic. By implementing the switching decision-making capability within the eyewear device's processor itself, the system simplifies the overall architecture while maintaining power optimization capabilities.
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.