Projector Light Intensity Control for Eye Safety
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Solution Overview
Problem
Existing projecting apparatuses lack an efficient method to control light intensity when not connected to external devices, leading to unnecessary light emission and potential eye hazards.
Innovation Solution
A projecting apparatus with a processor that sets the light intensity of projected light to a decreased state lower than the standard value when image data is not obtained by the receiver, thereby reducing unnecessary light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the projector outputs light at standard intensity when not connected to external devices, then the positioning and focusing functions are maintained, but unnecessary light emission occurs causing power waste and potential eye hazards
Solution Approach 1:
The projector dynamically adjusts light intensity based on operational context. When no external device is connected, the system automatically switches between standard intensity mode (for positioning and focusing) and decreased intensity mode (to reduce eye hazards and power consumption), making the light emission adaptive rather than static
Solution Approach 2:
The patent changes the light intensity parameter from a fixed standard value to a variable parameter that can take two states: standard intensity and decreased intensity. This parameter change is triggered by the connection status of external devices, allowing the system to optimize between safety and functionality
2Reliability
If the projector maintains standard light intensity when no image data is received, then the readiness for projection is ensured, but power consumption increases due to continuous full-intensity light emission
Solution Approach 1:
The system dynamically adjusts power consumption by switching light intensity based on image data reception status. When image data is not received, the projector automatically reduces light intensity to a decreased state, thereby reducing power consumption while maintaining the ability to quickly return to standard intensity when needed
3Productivity
If the projector outputs light at standard intensity without external device connection, then the light emission functionality is maintained, but unnecessary light output occurs wasting energy
Solution Approach 1:
The patent implements parameter-based control where light intensity changes from standard to decreased based on the presence or absence of image data. This ensures the projector maintains light emission functionality when needed while minimizing energy waste during idle periods without external device connection
Data Source
AI summary
A projecting apparatus includes a projector configured to output projected light; a receiver configured to obtain from outside, image data of a target image projected by the projector; and a processor configured to control operation of the projector. The processor is configured to set a light intensity of the projected light to a light decreased state lower than a standard value when the image data is not obtained by the receiver.