Image Sensor Lighting Fixture with Position-Based Illuminance Control
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Solution Overview
Problem
Current lighting control systems for large indoor and outdoor spaces are costly to install and maintain, often require rewiring, and can have abrupt On and Off cycles, which do not provide a good trade-off between energy efficiency and user experience.
Innovation Solution
The use of image sensors and wide-angle lenses in lighting fixtures to detect user presence and position, allowing for independent control of illuminance, increasing light as the user approaches the center of the detection area and decreasing it as they move away, without the need for rewiring or expensive maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a centrally located lighting control system is used to control multiple light fixtures, then lighting control capability is improved, but installation complexity and cost increase due to required rewiring and integration of sensors and drivers into dedicated communication systems
Solution Approach 1:
The patent divides the lighting control system into independent segments where each light fixture operates autonomously with its own motion sensor and control logic. This eliminates the need for a centralized control system and complex communication infrastructure, while still providing effective lighting control for the entire space.
Solution Approach 2:
Each light fixture is equipped with its own motion sensor and control circuitry that independently detects motion and adjusts lighting without requiring external control signals. This self-service capability eliminates the need for centralized monitoring and control, simplifying installation and reducing communication infrastructure requirements.
2Loss of energy
If motion sensors are used to control lighting in an area to save energy, then energy consumption is reduced, but user experience deteriorates due to abrupt On and Off cycles that do not provide continuous light when a person is present
Solution Approach 1:
The control circuitry dynamically adjusts the lighting output based on the detected motion characteristics and position within the detection area. Instead of simple binary On/Off control, the system modulates light intensity to provide smooth transitions and continuous illumination when needed, improving user experience while maintaining energy savings.
Solution Approach 2:
The motion sensor provides continuous feedback about user presence and position to the control circuitry, which adjusts lighting in real-time. This feedback mechanism enables the system to respond appropriately to user movements, providing continuous light when users are present while reducing illumination when areas are unoccupied, thus balancing energy efficiency with user comfort.
3Ease of operation
If remote lighting control is implemented, then user input requirement is reduced, but energy savings are limited because user input is still required to control luminosity
Solution Approach 1:
The lighting fixture autonomously controls its own illumination based on motion detection without requiring any user input. The control circuitry automatically adjusts light output based on detected motion patterns and position, eliminating the need for manual dimming or switching while achieving significant energy savings through intelligent, automated control.
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
This solution provides a balanced approach to energy savings and user experience by maintaining continuous lighting while minimizing energy consumption and avoiding abrupt light changes, with each luminaire operating independently and adapting to user movement without communication with neighboring fixtures.
Implementation Method 1
The controller receives detection signal data from the image sensor and wide-angle lens component when a user is within a detection area
Data Source
AI summary
Methods and systems for controlling lighting fixtures independently with image sensors. In an embodiment, a luminaire includes a controller, an image sensor and wide-angle lens component, and a light source. The controller receives detection signal data from the image sensor and wide-angle lens component when a user is within a detection area associated with a view angle of the wide angle lens, and then determines the position of the user. The controller then controls the illuminance of the light source based on the position of the user. In particular, illuminance is increased as the user approaches a center portion of the detection area, and decreased as the user moves away from the center portion.