Motion-Sensing Lighting Control Unit with Adaptive On-State Extension
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Solution Overview
Problem
Existing lighting systems require frequent user intervention to maintain the on state, as motion sensors may not detect stationary individuals, leading to unnecessary power consumption and effort in keeping the lighting unit on.
Innovation Solution
An electronic device with a detection unit and control unit that distinguishes between first and second movements, allowing the lighting unit to remain on for a longer period if a second movement is detected within a predetermined time frame, reducing the need for frequent user intervention by extending the on state based on the duration and frequency of the second movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lighting unit is turned on and maintained in the on state based on simple motion detection, then the lighting unit can be quickly activated, but the system requires frequent user intervention to maintain the on state when no movement is detected
Solution Approach 1:
The system performs preliminary actions by automatically extending the lighting on state before the user needs to intervene. When a second movement is detected within the detection period, the control unit automatically extends the on state to the end of a second predetermined period, preparing the lighting to remain on without requiring immediate user action. This eliminates the need for frequent manual intervention to maintain the lighting state.
2Duration of action of stationary object
If the lighting unit remains on for a long period without detection, then the lighting is available for extended use, but power consumption increases unnecessarily
Solution Approach 1:
The system dynamically adjusts the lighting on state duration based on detected user movements. The control unit changes the predetermined period from a first predetermined period to a second predetermined period when a second movement is detected. This dynamic adjustment allows the lighting to remain on longer when users are present and active, while automatically turning off after the extended period without further intervention, thus balancing availability and energy consumption.
Solution Approach 2:
The system uses feedback from the detection unit to control the lighting duration. The detection unit continuously monitors for movements, and the control unit adjusts the lighting on state based on this feedback. When a second movement is detected, the control unit extends the on state duration. This feedback mechanism ensures the lighting remains on only as long as necessary based on actual user presence and activity, preventing unnecessary energy consumption.
3Reliability
If the detection unit continuously monitors for movement, then the system can respond to user needs, but the system cannot distinguish between stationary users and absent users
Solution Approach 1:
The system segments movement detection into two distinct types: first movement (triggering initial on state) and second movement (extending on state). By segmenting the detection function this way, the system can reliably distinguish between different user behaviors. The detection unit monitors for first movements to activate lighting and for second movements to extend it, providing accurate differentiation between user presence and absence without requiring complex analysis.
Data Source
AI summary
An electronic device comprises: a detection unit configured to detect movement of a person; and a control unit configured to, in a case where the detection unit detects a first movement of the person, control an operation unit such that the operation unit is changed from a first state to a second state and maintains the second state for a first predetermined period, wherein, in a case where the detection unit detects a second movement of the person in a predetermined detection period spanning from before an end time of the first predetermined period until after the end time, the control unit controls the operation unit such that the operation unit maintains the second state until an end of a second predetermined period changed from the first predetermined period according to an aspect of the second movement.