Terminal Power-Saving Mode via Luminance Distribution Analysis
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Solution Overview
Problem
Existing terminal apparatuses struggle to accurately shift to a power-saving mode when placed in a bag or pocket, due to false triggers from illuminance sensors and motion detection, leading to unnecessary power consumption and reduced battery life.
Innovation Solution
A terminal apparatus equipped with a luminance distribution acquisition unit and a determination unit that uses learned model data from time series luminance and motion sensor information to accurately determine user operation status, enabling precise shifting to a power-saving mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal apparatus shifts to power-saving mode based only on illuminance threshold determination, then the device can enter power-saving mode quickly, but it causes false triggers when environmental light becomes dark during operation or when placed in an open bag
Solution Approach 1:
The patent combines multiple detection mechanisms (illuminance sensor, motion sensor, and determination unit with learned model) into a unified system for deciding power-saving mode activation. Instead of relying on a single sensor threshold, the system merges data from multiple sources and uses intelligent determination to accurately distinguish between legitimate bag placement and other scenarios like ambient lighting changes during active use.
2Reliability
If the terminal apparatus uses timer-based power-saving mode activation, then the system is simple to implement, but it fails to activate power-saving mode when the device is immediately placed in a bag without idle time
Solution Approach 1:
The system performs preliminary detection and analysis using the determination unit and learned model before actually activating power-saving mode. By pre-processing sensor data and predicting user intent through the learned model, the system can proactively activate power-saving mode at the optimal moment, avoiding both premature and delayed activation that would occur with simple timer-based approaches.
3Measurement precision
If the terminal apparatus uses motion sensor data alone to determine operation status, then the system can respond quickly to movement, but it cannot distinguish between device being placed in bag and normal handling movements
Solution Approach 1:
The determination unit acts as an intermediary between raw sensor data (illuminance and motion) and the final power-saving mode decision. It processes and integrates multiple data streams, using the learned model to interpret patterns and distinguish between bag placement and normal handling, thereby achieving high precision without overwhelming processing requirements.
4Use of energy by moving object
If the terminal apparatus keeps power on to avoid false power-saving activation, then operation responsiveness is maintained, but unnecessary power consumption occurs when device is in bag
Solution Approach 1:
The system uses feedback from the learned model and determination unit to dynamically control power-saving mode activation. By continuously monitoring sensor data and comparing it against learned patterns of bag placement versus active use, the system provides feedback-driven decisions that accurately balance power consumption with operational responsiveness, activating power-saving mode only when truly appropriate.
Data Source
AI summary
A terminal apparatus capable of shifting to a power-saving mode with high accuracy in a case where a user puts the terminal apparatus in a bag or pocket A luminance distribution acquisition section acquires luminance distribution around the terminal apparatus. A storage area stores a learned model generated from time series information including the luminance distribution acquired by the luminance distribution acquisition section. A determination section determines, based on the time series information and the learned model, whether a user operation of the terminal apparatus has been terminated or in progress. A power supply section shifts the terminal apparatus to the power-saving mode according to a result of the determination performed by the determination section.