Wearable Optical Device Power Control via Usability State Detection
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Solution Overview
Problem
Existing wearable optical devices, such as head-mounted displays (HMDs), face challenges in reducing power consumption effectively, as they struggle to distinguish between being worn by a user in a usable state and being carried in an unusable state, leading to inefficient power management.
Innovation Solution
An electronic apparatus with a state detection unit, a state determination unit, and a power supply controller that uses acceleration sensors and other detection methods to differentiate between usable and unusable states of the device, allowing for dynamic power supply control to minimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the device shuts off power when no movement is detected, then power consumption is reduced, but the device cannot distinguish between being removed and being worn in unusable state
Solution Approach 1:
The state detection is divided into multiple independent detection dimensions: movement detection, attachment state detection, and usability determination. Each dimension handles a specific aspect of state recognition, allowing the system to accurately distinguish between different states (worn/usable, worn/unusable, removed) while enabling selective power management for each detection module.
Solution Approach 2:
The power supply control dynamically adjusts the operational state of different detection units based on the current usage state. When the device is determined to be in unusable state while worn, the system transitions from full operation to partial operation, shutting off power to image generation and processing units while maintaining attachment state detection capability.
2Use of energy by moving object
If the device stops image generation operations when unusable state is detected, then power consumption is reduced, but the device may fail to resume operations quickly when needed
Solution Approach 1:
The system maintains the attachment state detection unit in an active or low-power standby state even when image generation is shut off. This preliminary maintenance of detection capability ensures that when the device is put back into usable state, the system can quickly detect the change and resume image generation operations without lengthy initialization delays.
Solution Approach 2:
The power supply controller implements periodic or event-driven resumption of image generation operations based on detection results. Instead of complete shutdown with long startup times, the system can quickly reactivate image generation when usability conditions are met, optimizing the balance between power saving and operational readiness.
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
This solution enables effective reduction of power consumption in wearable optical devices by accurately determining their usability state, thereby optimizing power management and extending battery life without compromising user convenience.
Implementation Method 1
a state detection unit configured to detect a state relating to the wearable optical device
Data Source
AI summary
Provided is an electronic apparatus including a wearable optical device, a state detection unit configured to detect a state relating to the wearable optical device, state determination unit configured to determine that the detected state is at least one of a first state in which the wearable optical device is worn by a user in usable state or a second state in which the wearable optical device is worn or carried by the user in unusable state, and a power supply controller configured to control a power supply state of the electronic apparatus based on a result obtained by the determination.