Capacitive Touch Hem Bar for Motorized Shade Control
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Solution Overview
Problem
Motorized roller shades lack intuitive and accessible local control solutions, with existing methods requiring forceful interaction or being non-intuitive, which can lead to misalignment or damage.
Innovation Solution
A touch-actuated motorized shade system that incorporates a hem bar with a touch sensing module to detect gestures and transmit control signals wirelessly to a motor control module, allowing for easy and intuitive control of the shade's operation, including gestures for opening, closing, and stopping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sensors are used to detect pull or tug on the shade or hem bar, then local control is achieved, but quite a bit of force is required and the reaction is slow
Solution Approach 1:
The patent replaces the mechanical pull/tug sensing system with a capacitive touch sensing system. The hem bar incorporates a capacitive sensor that detects touches through electrical field changes rather than mechanical force, eliminating the need for substantial pulling force while enabling responsive control of the motorized shade.
Solution Approach 2:
The patent changes the detection parameter from mechanical force (pull/tug) to electrical capacitance (touch). The capacitive sensor measures changes in electrical field when a user touches the hem bar, providing a more sensitive and easier-to-operate control mechanism that requires minimal force and provides faster reaction.
2Ease of operation
If sensors are used to detect pull or tug on the shade or hem bar, then local control is achieved, but it is slow to react
Solution Approach 1:
The patent replaces the mechanical pull/tug sensing system with a capacitive touch sensing system. The hem bar incorporates a capacitive sensor that detects touches through electrical field changes rather than mechanical force, eliminating the need for substantial pulling force while enabling responsive control of the motorized shade.
Solution Approach 2:
The patent changes the detection parameter from mechanical force (pull/tug) to electrical capacitance (touch). The capacitive sensor measures changes in electrical field when a user touches the hem bar, providing a more sensitive and easier-to-operate control mechanism that requires minimal force and provides faster reaction.
3Ease of operation
If continued pulling on the shade is used for control, then local control is achieved, but it can misalign the shade, damage the shade, or loosen tension in the counterbalancing system
Solution Approach 1:
The patent replaces the mechanical pull/tug sensing system with a capacitive touch sensing system. The hem bar incorporates a capacitive sensor that detects touches through electrical field changes rather than mechanical force, eliminating the need for substantial pulling force while enabling responsive control of the motorized shade.
Solution Approach 2:
The patent introduces a capacitive sensor as an intermediary between the user and the motorized shade control system. This sensor detects touches on the hem bar and translates them into control signals, eliminating the need for direct mechanical interaction that could misalign or damage the shade while maintaining intuitive local control.
4Ease of operation
If buttons on the shade controller are used, then local control is achieved, but they are difficult or impossible to reach and non-intuitive
Solution Approach 1:
The patent makes the entire hem bar surface functional as a control interface through capacitive sensing. Any portion of the hem bar can be touched to control the shade, eliminating the need for specific buttons or switches that are difficult to reach. This universal control approach simplifies the interface while maintaining local control capability.
Solution Approach 2:
The patent introduces a capacitive sensor as an intermediary between the user and the motorized shade control system. This sensor detects touches on the hem bar and translates them into control signals, eliminating the need for direct mechanical interaction that could misalign or damage the shade while maintaining intuitive local 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
Enables easy, force-free, and intuitive local control of motorized shades, preventing misalignment and damage, while allowing simultaneous control of multiple shades and incorporating safety features to prevent obstacles.
Implementation Method 1
a touch sensing module adapted to detect a touch of the hem bar assembly and transmit a control signal in response to the detected touch
Data Source
AI summary
A motorized shade for covering a window, a door, or a wall opening is provided that can be actuated by touching its hem bar. The motorized shade, such as a roller shade, comprises a shade material extending from a top end to a bottom end, a hem bar assembly connected to the bottom end of the shade material, and a shade drive unit operably connected to the top end of the shade material. The hem bar assembly comprises a touch sensing module adapted to detect a user touching the hem bar assembly and transmit a control signal in response to the detected touch. The shade drive unit comprises a motor and a motor control module adapted to receive the control signal and control the motor to open or close the shade material. The control signal can be wirelessly transmitted from the touch sensing module to the motor control module.