Sealed Knob-on-Display Base Assembly for Stable Touch Sensing
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Solution Overview
Problem
Existing knob on display (KoD) devices for touch screen devices face challenges such as mechanical complexity, susceptibility to foreign elements like water and dirt, and difficulties in maintaining reliable electrical connections.
Innovation Solution
The proposed solution involves a KoD device design with a base assembly that encases electrodes, providing a fully sealed and robust structure. This design includes a touch surface electrically connected to a rotation electrode pad and selectively connected to a push electrode pad through a tactile dome switch, maintaining constant distances from the touch screen regardless of the device's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional KoD device is used without a base assembly, then the mechanical construction is simpler, but the device is susceptible to foreign elements like water and dirt ingress
Solution Approach 1:
The base assembly encases the electrodes and internal components within a sealed housing structure, creating a nested configuration where the electrodes are protected inside the base assembly. This nesting approach provides comprehensive protection against foreign elements while maintaining a compact and integrated design.
Solution Approach 2:
The base assembly incorporates a sealed housing that acts as a protective shell, preventing water and dirt ingress while allowing the device to maintain its structural integrity. The sealed enclosure provides environmental protection without significantly increasing the overall device footprint.
2Reliability
If electrodes are exposed in traditional KoD devices, then electrical connections can be established, but the connections are susceptible to degradation from foreign elements
Solution Approach 1:
The electrodes are nested within the sealed base assembly, allowing electrical connections to be established through the base assembly while protecting the electrodes from direct exposure to foreign elements. This nested configuration maintains electrical functionality while providing environmental protection.
Solution Approach 2:
The base assembly acts as an intermediary structure between the electrodes and the external environment, allowing electrical signals to pass through while blocking foreign elements. The sealed housing serves as a mediator that enables electrical connectivity while preventing contamination.
3Object-affected harmful factors
If a sealed base assembly is implemented, then protection against foreign elements is improved, but the mechanical complexity increases
Solution Approach 1:
The base assembly merges multiple functions into a single integrated structure: it provides mechanical support for the electrodes, creates a sealed enclosure for environmental protection, and enables electrical connections. This consolidation reduces overall device complexity while achieving comprehensive protection.
Solution Approach 2:
The base assembly serves multiple purposes simultaneously: it acts as a structural support, a sealed protective housing, and an electrical connection interface. This multi-functionality approach reduces the need for separate components, thereby managing complexity while providing robust protection.
4Adaptability or versatility
If the KoD device position varies, then flexibility in installation is improved, but electrical connection consistency deteriorates
Solution Approach 1:
The base assembly maintains constant electrical potential and consistent spacing between electrodes and the touch screen regardless of device position. The sealed structure ensures that electrical connections remain stable and uniform, providing equipotential conditions that guarantee consistent performance across different installation orientations.
Solution Approach 2:
The patent replaces mechanical positioning systems with a sealed base assembly design that inherently maintains consistent electrical connections through its structured enclosure. This substitution eliminates the need for complex mechanical adjustment mechanisms while ensuring connection consistency.
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 solution enhances the reliability and durability of KoD devices by preventing foreign element ingress, simplifying mechanical construction, and maintaining consistent electrical connections, thereby improving performance and water immunity.
Implementation Method 1
a tactile dome switch positioned between the rotation electrode pad and the push electrode pad
Data Source
AI summary
Knob on display (KoD) devices and related systems, methods, and devices are disclosed. A KoD device includes at least one electrode including an electrically conductive material. The KoD device also includes a base assembly configured to be positioned between a touch screen of a touch screen device and the at least one electrode. The at least one electrode is configured to be positioned in engagement proximity to a touch sensor of the touch screen device through the base assembly.