Capacitive Touch Load Control with Adaptive Filtering Feedback
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Solution Overview
Problem
Traditional load control devices lack the capability to perform advanced user interactions and provide visual feedback, limiting their functionality and usability in controlling complex electrical loads.
Innovation Solution
A load control device featuring a capacitive touch surface that detects point actuations and generates control signals based on filtering techniques, allowing for advanced control of electrical loads and providing visual feedback through a light bar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional mechanical toggle switch is used, then the device structure is simple, but the control functionality is limited and cannot perform advanced user interactions
Solution Approach 1:
The patent replaces the traditional mechanical toggle switch with a capacitive touch surface that detects touch inputs through capacitance changes. This substitution eliminates mechanical moving parts while enabling advanced control functionalities such as dimming, preset selection, and scene control, directly resolving the contradiction between simplified structure and enhanced adaptability.
Solution Approach 2:
The load control device is designed to perform multiple functions including dimming control, preset selection, scene activation, and visual feedback provision through a single unified interface. This multi-functionality approach allows the device to control various electrical loads (lights, HVAC, audio systems) with diverse features, thereby achieving high adaptability without proportionally increasing structural complexity.
2Loss of information
If a traditional load control device is used, then the device structure is simple, but visual feedback capability is lacking
Solution Approach 1:
The patent incorporates visual feedback mechanisms including LED indicators and a light bar that provide real-time information about device status, load state, and operational mode. This feedback loop allows users to immediately see the results of their control actions, reducing information loss and improving user experience without significantly complicating the device structure.
3Adaptability or versatility
If a capacitive touch surface with multiple control actions is implemented, then control versatility is enhanced, but the difficulty of detecting and measuring touch positions increases
Solution Approach 1:
The capacitive touch surface is divided into multiple discrete sensing zones or segments, each corresponding to a specific control function (e.g., dimmer slider, preset buttons, scene selectors). By segmenting the touch surface into distinct detectable regions, the system can accurately identify touch positions and map them to specific control actions, thereby reducing the difficulty of detection while maintaining high versatility.
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 advanced control of electrical loads with enhanced usability and aesthetic appeal by allowing multiple control actions and providing visual feedback to users.
Implementation Method 1
an actuation member having a front surface defining a touch sensitive surface (e.g., a capacitive touch surface) configured to detect a point actuation along at least a portion of the front surface
Implementation Method 2
providing visual feedback through a light bar
Data Source
AI summary
A control device configured for use in a load control system to control one or more electrical loads may comprise an actuation member having a front surface defining a touch sensitive surface configured to detect a point actuation along at least a portion of the front surface, a touch sensitive circuit, and a control circuit. The touch sensitive device may comprise one or more receiving capacitive touch pads located behind the actuation member and arranged in a linear array adjacent to the touch sensitive surface. The control circuit may be configured to operate using different filtering techniques based on the state/mode of the control device and/or based on whether the positions of point actuations by a user along the touch sensitive surface indicate a fine tune or gross adjustment by the user. For example, the control circuit may generate an output signal using light/no filtering or using heavy filtering.