Illumination Control System Eye State Glare Reduction
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Solution Overview
Problem
Existing illumination systems cause glare when a user opens their eyes from a closed state or when their line of sight is oriented towards the light source, as they are designed to apply light stimulus regardless of eye state.
Innovation Solution
An illumination control system that includes a signal detection unit to determine eye state and sight line direction, and a control unit to adjust illuminance and light color based on these conditions, reducing glare by lowering illuminance when eyes are closed and adjusting light characteristics when eyes are open and oriented towards the light source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the illumination device applies light stimulus regardless of eye state, then the awakening effect is maintained, but glare occurs when the user opens their eyes from a closed state
Solution Approach 1:
The illumination device dynamically adjusts its operation mode based on the detected eye state. When the eye is detected as open, the device switches to a glare-reducing mode that modulates light output, whereas in closed-eye state it maintains standard illumination for awakening effect. This dynamic adaptation resolves the contradiction by making the system responsive to real-time physiological conditions.
Solution Approach 2:
The system incorporates feedback from eye state detection (via camera or eye potential measuring instrument) to control the illumination output. The control unit continuously monitors eye state and adjusts the light stimulus accordingly, creating a closed-loop system that prevents glare while maintaining awakening effectiveness. The feedback mechanism enables the system to distinguish between states requiring glare reduction and states where full illumination is appropriate.
2Illumination intensity
If the illumination device uses high intensity light to ensure visibility, then the illumination effectiveness is improved, but user discomfort increases due to glare
Solution Approach 1:
The system changes the illumination parameters (intensity, color temperature, modulation pattern) based on detected eye state and sight line direction. When the eye is open and sight line indicates potential exposure, the device adjusts parameters to reduce glare while maintaining sufficient illumination effectiveness. This parameter adaptation allows the system to optimize both illumination effectiveness and user comfort simultaneously.
Data Source
AI summary
An illumination control system includes a signal detection unit for detecting a signal changed depending on an eye state of a person, an opening/closing determination unit for determining an opening/closing state of an eye of the person based on the detected signal, and a sight line detection unit for detecting a person's sight line direction with respect to an illumination device based on the detected signal. The illumination control system further includes a control unit for controlling the illumination device to reduce an illuminance when the opening/closing determination unit determines that the eye of the person is in a closed eye state, and to change an illuminance and a light color based on the sight line direction detected by the sight line detection unit when the opening/closing determination unit determines that the eye of the person is in an open eye state.