Flicker Detection and Control for Lighting Efficiency
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Solution Overview
Problem
Flickering artificial lighting and visual displays can cause neural disruptions, headaches, and epileptic seizures in some individuals due to the inability of the human visual system to process high-speed optical signals effectively, necessitating a method to mitigate these effects.
Innovation Solution
A method and apparatus that measure and adjust the frequency and duty cycle of light sources to prevent flicker, using a flicker detector to block harmful light and provide warnings when flicker exceeds threshold values, incorporating filters and rectification techniques in lighting devices and video equipment to ensure flicker fusion within safe limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If artificial light sources operate at high frequency (50-60 Hz) to provide continuous illumination, then lighting efficiency is improved, but perceptible flicker occurs causing neural disruptions and health risks
Solution Approach 1:
The patent applies parameter changes by adjusting the frequency and duty cycle of the light source to achieve flicker fusion. Specifically, it operates the light source at frequencies between 15-120 Hz with duty cycles between 10-90%, transforming the lighting operation parameters to eliminate perceptible flicker while maintaining efficiency.
2Stability of the object's composition
If video displays present images at high frame rates (30 fps) to improve image continuity, then visual quality is improved, but severe neural disruptions occur in sensitive individuals
Solution Approach 1:
The patent applies parameter changes by adjusting the frame rate and duty cycle of video displays to achieve flicker fusion. It operates at frame rates between 15-120 fps with duty cycles between 10-90%, transforming the display parameters to ensure image continuity while preventing neural disruptions in sensitive individuals.
3Object-affected harmful factors
If light sources operate at frequencies below flicker fusion threshold to avoid perceptible flicker, then health safety is improved, but lighting efficiency and brightness reduce
Solution Approach 1:
The patent applies parameter changes by operating light sources at frequencies between 15-120 Hz with duty cycles between 10-90%, which is above the traditional flicker fusion threshold. This transforms the operating parameters to maintain both health safety and lighting efficiency simultaneously.
Solution Approach 2:
The patent applies dynamics by continuously monitoring the light source characteristics and dynamically adjusting the frequency and duty cycle to maintain optimal operation. The system adapts the operating parameters in real-time to ensure both safety and efficiency are maintained under varying conditions.
4Object-affected harmful factors
If flicker detection and control systems are implemented to prevent neural disruptions, then health safety is improved, but device complexity increases
Solution Approach 1:
The patent applies self-service by implementing a feedback control system that automatically monitors light source characteristics and adjusts operating parameters without external intervention. The system measures frequency and duty cycle, compares them to safe thresholds, and autonomously corrects deviations, eliminating the need for complex external control mechanisms.
Solution Approach 2:
The patent applies feedback by continuously measuring the light source characteristics and using this information to control the operating parameters. The system establishes a feedback loop where measurement results directly influence control actions, maintaining safe operation while simplifying the overall system architecture through intelligent automation.
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 reduces perceptible flicker in lighting and display devices, ensuring safer visual stimulation for sensitive individuals by adjusting frequency and duty cycles within critical flicker fusion thresholds, thereby minimizing neural disruptions and health risks.
Implementation Method 1
measuring a predetermined set of characteristics of the light source and detecting flicker when the predetermined set of characteristics exceed a corresponding flicker fusion threshold value
Implementation Method 2
a frequency and duty cycle of light output from the light source
Data Source
AI summary
A method and apparatus are provided for processing light from a light source. The method includes the steps of measuring a predetermined set of characteristics of the light source and detecting flicker when the predetermined set of characteristics exceed a corresponding flicker fusion threshold value.