Transparent Physical Keypad for Interactive Display Tactile Feedback
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Solution Overview
Problem
Existing interactive displays for electronic devices lack tactile feedback, making it difficult for users to locate keys, especially in touchscreen interfaces where visual cues alone are insufficient for input accuracy.
Innovation Solution
An interactive display system that switches between interactive and non-interactive modes, utilizing a substantially transparent physical keypad with tactile feedback, made of materials like piezoelectric or magnetostrictive materials, which provides raised or indented keys corresponding to imaged keys on the screen, and includes a touchscreen panel with openings for physical keys to protrude when in interactive mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a touchscreen interface is used without physical keys, then device complexity is reduced and sleekness is improved, but user input accuracy deteriorates due to lack of tactile feedback
Solution Approach 1:
The display surface is segmented into multiple functional layers: a transparent touchscreen panel layer and a separate physical keypad layer with tactile feedback elements. This segmentation allows each layer to perform its specific function - the touchscreen provides visual interaction while the physical keypad provides tactile guidance for key location identification.
Solution Approach 2:
A transparent physical keypad acts as an intermediary element between the user and the touchscreen display. This intermediary provides tactile feedback to help users locate keys while allowing the touchscreen to remain visually clean and simple, resolving the contradiction between interface simplicity and input accuracy.
2Measurement precision
If physical keys are added to provide tactile feedback, then key location accuracy is improved, but device complexity increases
Solution Approach 1:
The physical keypad is merged with the touchscreen assembly, where the physical keys are integrated into the same housing structure. This merging allows the physical and virtual key systems to work together seamlessly, providing tactile feedback without requiring a completely separate physical keyboard that would increase overall device complexity.
Solution Approach 2:
The physical keypad utilizes thin, flexible structures that can be integrated within the display assembly. The physical keys are formed as thin protrusions or indentations in the transparent keypad layer, providing tactile feedback while maintaining a sleek, thin profile that does not significantly increase device thickness or complexity.
3Shape
If a transparent physical keypad is used, then aesthetic appearance is improved while maintaining visual clarity, but manufacturing complexity increases
Solution Approach 1:
The physical keypad is manufactured using parameters that allow it to be transparent or translucent while maintaining structural integrity. The keys are formed with specific optical properties that allow light transmission, creating a visually appealing transparent appearance while the manufacturing process uses standard molding or fabrication techniques to create the tactile structures.
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
Enhances user input accuracy by providing tactile feedback of key locations, improving usability and accessibility for devices like cell phones and PDAs by allowing users to feel the layout of virtual keys, thus complementing visual input methods.
Implementation Method 1
the physical keypad comprises piezoelectric material
Implementation Method 2
the physical keypad is made of a magnetostrictive material
Data Source
AI summary
An electronic device including an interactive display having an interactive mode and a non-interactive mode. The interactive display comprises an image display device that displays a user-interactive imaged keypad in at least a portion of the image display device when the interactive display is in the interactive mode and that displays other image data in the at last a portion of the image display device when the interactive display is in the non-interactive mode, and a substantially transparent physical keypad that provides tactile feedback to a user indicating location of keys within the imaged keypad.