Light Source Apparatus with Feedback Control for Retina Safety
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Solution Overview
Problem
Existing light source technologies for projecting video light onto retinas do not adequately ensure user safety by quickly stopping light emission in abnormal cases, such as apparatus malfunctions, and fail to limit light exposure to safe thresholds to prevent retina damage.
Innovation Solution
A light source apparatus comprising multiple color light source units, a light-combining/splitting unit, a light-receiving unit, and a control unit that switches the light source units based on received light, with optional filter units having wavelength-dependent properties to ensure safe light exposure, and an image display apparatus that separates the light source and objective optical units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional APC control is used to emit stable light, then light stability is improved, but user safety in abnormal cases is not sufficiently secured
Solution Approach 1:
The patent implements a feedback mechanism where a light-receiving unit continuously monitors the light emitted by the light source units and feeds this information back to the control unit. The control unit compares the monitored light amount against a predetermined threshold and automatically adjusts or stops the light source units accordingly. This closed-loop feedback system ensures that even in abnormal cases, the light emission is controlled to safe levels, thereby improving user safety while maintaining light stability during normal operation.
2Illumination intensity
If light emission is increased to improve display quality, then video recognition quality is improved, but retina damage risk increases
Solution Approach 1:
The light-receiving unit provides real-time feedback on the actual light emission amount to the control unit. The control unit uses this feedback to regulate the light source units, ensuring that the light emission remains within safe thresholds for retina protection while still achieving adequate display quality. This dynamic regulation allows the system to optimize light output based on actual conditions.
Solution Approach 2:
The system dynamically changes the operating parameters of the light source units based on the feedback from the light-receiving unit. When the monitored light amount approaches or exceeds the safety threshold, the control unit adjusts the emission parameters to reduce intensity. This parameter modulation enables the system to maintain high display quality while preventing retina damage by adapting light output to safe levels.
3Object-affected harmful factors
If quick light stopping is implemented for safety, then user safety is improved, but normal light emission control precision may be compromised
Solution Approach 1:
The feedback mechanism enables precise control by continuously monitoring actual light emission and comparing it with target values. The control unit can make fine adjustments based on real-time feedback, ensuring that light emission stops quickly and accurately when safety thresholds are approached, while maintaining precision during normal operation through continuous regulation.
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
The solution effectively limits light exposure to safe thresholds, ensuring user safety by quickly stopping light emission in abnormal cases and providing a high-quality video display without compromising color balance or contrast.
Implementation Method 1
at least one light-receiving unit that receives light emitted from the light-combining/splitting unit
Implementation Method 2
a filter unit that is disposed on an optical path of light emitted from the light-combining/splitting unit and has wavelength dependency
Data Source
AI summary
It is an object of the present invention to provide a light source apparatus and an image display apparatus. A light source apparatus according to the present invention including: a plurality of light source units that respectively emits light in respective colors; a light-combining/splitting unit that combines/splits light emitted from each of the plurality of light source units; at least one light-receiving unit that receives light emitted from the light-combining/splitting unit; and a control unit that switches activation and deactivation of each of the plurality of light source units, in which the control unit stops each of the plurality of light source units on the basis of light received by the light-receiving unit.