Projection Module Motion Detection for Eye Safety
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Solution Overview
Problem
Existing electronic devices with projection modules lack an efficient solution to prevent projected light beams from illuminating human eyes during movement and require frequent switching on and off, leading to tedious operations.
Innovation Solution
A method and electronic device that detect motion information to adjust the projection module's operating state, switching between projection and non-projection modes based on the device's motion state, thereby preventing light from being projected towards human eyes without manual user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the projection module is turned off to prevent projected light beam from being projected towards human eyes during movement, then safety is improved, but operation convenience deteriorates due to frequent switching on and off
Solution Approach 1:
The projection module automatically detects device motion through the motion detection unit and adjusts its operating state without requiring manual user intervention. The system serves itself by using motion information to control the projection module's on/off state, eliminating the need for users to manually switch the projection module on and off.
Solution Approach 2:
The system implements a feedback mechanism where motion detection information is continuously monitored and fed back to control the projection module's state. When motion is detected, the projection module automatically turns off; when stationary, it turns on, creating a closed-loop control system that responds to user actions automatically.
2Object-affected harmful factors
If the projection module is frequently switched on and off to match device movement, then safety is improved, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The motion detection unit serves multiple functions: it detects device motion, provides feedback for projection module control, and enables automatic state adjustment. By making the motion detection unit multi-functional, the system avoids adding separate complex control mechanisms while still achieving safe automatic projection control.
3Ease of operation
If the projection module remains on during device movement, then operation convenience is maintained, but harmful effects increase due to light beam projection towards human eyes
Solution Approach 1:
The projection module's operating state is made dynamic rather than static. It automatically adjusts between on and off states based on real-time motion detection, transitioning from a fixed continuous operation mode to an adaptive dynamic mode that responds to device movement conditions.
Data Source
AI summary
A projection method of an electronic device, the electronic device has projection module. The method includes: detecting motion information of the electronic device to obtain a motion parameter; determining whether the motion parameter meets a predetermined condition; and adjusting an operating state of the projection module to match a motion state of the electronic device if the motion parameter meets the predetermined condition.