Motion Sensor Camera Illumination Control
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Solution Overview
Problem
Battery-powered security camera systems face challenges in conserving battery life due to the need for continuous lighting, which reduces their operational effectiveness and safety.
Innovation Solution
A motion-activated lighting system that selectively activates multiple emitters based on the direction and distance of a motion event, using a subset of LEDs at varying power levels to focus light output, thereby reducing power consumption and extending battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If motion-activated lighting is continuously activated to provide good quality video at night, then video quality is improved, but battery life is reduced
Solution Approach 1:
The light device is divided into multiple emitters arranged in an array, each capable of being independently controlled. The system segments the illumination task by activating only the subset of emitters corresponding to the detected motion direction, rather than activating all emitters continuously. This segmentation allows the system to maintain adequate lighting quality for the area of interest while significantly reducing overall power consumption to extend battery life.
Solution Approach 2:
The system applies local quality by directing light output specifically toward the detected motion event location rather than providing uniform illumination across the entire field of view. The emitters are selectively activated based on the angular direction of the motion event, concentrating lighting resources where they are most needed. This localized approach maintains video quality in the area of interest while reducing unnecessary illumination elsewhere, thereby lowering power consumption and extending battery operation time.
2Area of stationary object
If multiple emitters are activated to cover the entire field of view, then illumination coverage is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the number and arrangement of active emitters based on real-time motion detection results. Rather than maintaining a static configuration where all emitters are always active, the system adapts its illumination pattern by selecting which emitters to activate corresponding to the detected motion direction. This dynamic adjustment allows the system to maintain adequate illumination coverage for the area of interest while minimizing power consumption by keeping unnecessary emitters off.
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 system effectively extends battery life by limiting light output to only the area of interest, reducing unnecessary power usage and maintaining video quality while maximizing safety.
Implementation Method 1
The light device may comprise multiple emitters arranged in an array orienting at different angles to each other to provide an aggregate light output corresponding to the FOV of the motion sensor
Data Source
AI summary
Systems, apparatuses, and methods are described for performing individual control of multiple light emitters of a light emitting device associated with a camera. Selection of light emitters to turn on, while keeping other light emitters turned off, may be based on a motion event determined from a motion sensor and the location of the motion within a field of view or the camera. The system may conserve power by focusing the light output on the region of the motion event and relatively dimming outside of the region of the motion event.