Continuous Lens Key Structure Preventing Switch Falsing
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Solution Overview
Problem
Electronic mobile devices with aesthetically pleasing continuous key and display structures face challenges in user manipulability due to 'key falsing' with mechanical switches, and touch-sensitive inputs lack tactile feedback.
Innovation Solution
A key/display assembly featuring mechanical switches positioned on opposite sides of a trackpad, combined with a capacitive touch-sensitive input panel and a continuous lens structure, providing tactile feedback and preventing switch falsing while maintaining an aesthetically pleasing design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a continuous lens structure is used to define adjacent menu keys, then aesthetic appearance is improved, but key reliability deteriorates due to falsing
Solution Approach 1:
The continuous lens structure is segmented into separate key regions by introducing slits or breaks between adjacent menu keys. These slits physically divide the lens into independent segments, preventing force from one key area from transmitting to adjacent keys, thereby eliminating falsing while preserving the overall aesthetic continuous appearance.
Solution Approach 2:
The lens structure transitions from being uniformly continuous to having localized variations: continuous in appearance overall but with localized slits or breaks between specific key regions. This local modification allows the lens to maintain aesthetic continuity while introducing functional separation where needed to prevent falsing.
2Ease of operation
If mechanical switches are used beneath the lens, then tactile feedback is provided, but key falsing occurs due to continuous lens structure
Solution Approach 1:
The lens is divided into separate key regions through slits, isolating each mechanical switch's actuation zone. This segmentation ensures that pressing one key does not transmit force to adjacent switches, preventing falsing while each switch continues to provide tactile feedback through its isolated mechanical action.
Solution Approach 2:
The slits or breaks in the lens act as intermediaries that block the transmission of mechanical force between adjacent key regions. These intermediaries allow each mechanical switch to operate independently with full tactile feedback while preventing unwanted actuation of neighboring switches.
3Reliability
If slits or breaks are provided between adjacent keys, then key falsing is prevented, but aesthetic appeal is reduced
Solution Approach 1:
The lens maintains overall visual continuity with localized slits or breaks strategically placed between keys. These localized discontinuities are minimized in width and strategically positioned to be less visually obtrusive, preserving the aesthetic appeal while providing sufficient separation to prevent falsing.
Solution Approach 2:
The visual appearance of the continuous lens is preserved through careful design where the slits are made narrow or aesthetically integrated, creating a visual copy of a continuous structure that functionally contains the necessary breaks to prevent falsing.
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 effectively prevents switch falsing and provides tactile feedback, enhancing user interaction without compromising the device's aesthetic appeal.
Implementation Method 1
A touch-sensitive input panel overlies the first switch and the display module
Implementation Method 2
A first switch and a display module are disposed aside one another. A touch-sensitive input panel overlies the first switch
Implementation Method 3
an external lens that overlies a display module and defines, in part, one or more adjacent menu keys
Data Source
AI summary
A key/display assembly includes a first switch and a display module disposed aside the first switch. A touch-sensitive input panel overlies the first switch and the display module, and the touch-sensitive input panel includes a first touch-sensitive region proximate the first switch. The electronic mobile device further includes a first key defined by the first switch and the first touch-sensitive region. As such, the first key is actuated by pressing the first touch-sensitive region to displace the first touch-sensitive region and thereby actuate the first switch.