Accelerometer-Based Touch Control for LED Luminaires
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Solution Overview
Problem
Conventional luminaires lack the capability to be converted into touch-controlled devices without customization, limiting user interaction and requiring custom-built or expensive circuitry for touch and sound-based control methods.
Innovation Solution
An LED-based lighting unit with an accelerometer and controller that measures mechanical forces and movements, allowing for the selection and control of light properties based on predetermined inputs, enabling touch control without capacitive surfaces or customizations, and optionally incorporating gyroscopes and microphones for enhanced detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If custom capacitive surfaces or specialized circuitry are added to enable touch control, then user interaction capability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent replaces complex capacitive touch sensing systems with simple mechanical acceleration sensing. An accelerometer detects physical interactions (taps, shakes, gestures) with the luminaire, converting mechanical movements into control signals. This substitution eliminates the need for custom capacitive surfaces and complex touch control circuitry, reducing device complexity while maintaining versatile user interaction capabilities
Solution Approach 2:
The accelerometer serves multiple functions: detecting tap gestures, shake gestures, directional movements, and impact events. A single sensor component enables various touch control modes (single tap, double tap, long press, shake to wake) without requiring separate sensing mechanisms for each gesture type, achieving multi-functionality with minimal added complexity
2Ease of operation
If conventional luminaires are used without modification, then ease of installation is maintained, but user interaction capability is limited
Solution Approach 1:
The patent merges the lighting function with motion sensing capability by integrating an accelerometer into the luminaire's existing structure. The controller combines acceleration data with lighting control logic, creating a unified system where physical movements naturally translate into lighting commands. This merging enables intuitive user interaction without requiring separate control interfaces or modifying the luminaire's fundamental design
Solution Approach 2:
The luminaire automatically interprets physical gestures and converts them into appropriate lighting responses without requiring external controllers or complex processing. The integrated controller directly maps acceleration patterns to lighting actions (e.g., tap to toggle, shake to adjust brightness), enabling the system to serve itself with minimal user intervention and no external programming required
3Ease of manufacture
If accelerometer-based control is implemented, then ease of manufacture and compatibility with conventional luminaires is improved, but measurement precision for subtle touches may be reduced
Solution Approach 1:
The system dynamically adapts its response based on the characteristics of detected acceleration events. Instead of using fixed thresholds, the controller analyzes acceleration magnitude, duration, and patterns to distinguish between intentional gestures ( deliberate taps, shakes) and incidental movements. This dynamic interpretation compensates for the accelerometer's limited sensitivity to very light touches by contextualizing the measured data
Solution Approach 2:
The patent implements a learning mode where the system pre-calibrates by observing user interaction patterns during initial setup. The controller learns the specific user's tapping style, force application, and gesture preferences, storing this information for more accurate future recognition. This preliminary action enables the system to adapt to subtle variations in user behavior, improving measurement precision for individual users while maintaining ease of manufacture
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
Enables ordinary luminaires to be converted into touch-controlled units, providing intuitive user interaction without the need for capacitive surfaces or customizations, offering flexible control of light properties through mechanical forces and movements.
Implementation Method 1
an accelerometer; and a controller coupled with the one or more LEDs and the accelerometer. The controller may be configured to: receive, from the accelerometer, a signal representative of a measured mechanical force applied to or movement of the luminaire
Data Source
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AI summary
An LED-based lighting unit (100, 200, 300, 400, 1000, 1100, 1200, 1300, 1400, 1500) may be installable into a luminaire (108, 208, 308, 408, 1008, 1108, 1208, 1308, 1408, 1508) to cause the luminaire to be responsive to applied forces and/or movements to control one or more properties of light emitted by the lighting unit. The lighting unit may include one or more LEDs (102), an accelerometer (114), and a controller (112). The controller may: receive, from the accelerometer, a signal representative of a measured mechanical force applied to or movement of the luminaire in which the LED-based lighting unit is installed; determine, based on the signal from the accelerometer, that the measured mechanical force or movement corresponds to one or more predetermined forces or movements; and energize the one or more LEDs to emit light having one or more properties selected based on the determination.