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Hence, the conventional wisdom has been that membrane switches without key travel are unacceptable for such keyboard applications as typing tasks.
Rapid learning resulted in improvement in typing performance with the membrane keyboard — both within an experimental session and across sessions — such that the advantage of the conventional keyboard over the membrane one for touch typists was reduced substantially, although not completely.
Here we report a self-powered, non-mechanical-punching keyboard enabled by contact electrification between human fingers and keys, which converts mechanical stimuli applied to the keyboard into local electronic signals without applying an external power.
It is timely to explore a low-cost TENG-based keyboard made completely of commercial fabric for early commercialization.
This mechanism is promising for touch-typing keyboard rendering (“multi-click”).
Using a multi-frequency capacitance sensing technique based on a transmission line model, we demonstrate how this keyboard can detect touch in two dimensions, programmable to increase the number of keys and into different layouts, all without adding any new wires, connections or modifying the hardware.
Open accessBook ChapterDOI
Jin Ryong Kim, Hong Z. Tan 
24 Jun 2014
8 Citations
Our findings suggest that haptic feedback is beneficial to typing performance and its intensity should be carefully chosen in designing a flat keyboard.
With implementation of laser technology, this virtual keyboard solves many problems faced with traditional keyboards, making it more practical.
This article introduces a new soft keyboard, named Tap and Slide, specifically designed for mobile devices.
Open accessProceedings ArticleDOI
Jin Ryong Kim, Hong Z. Tan 
20 Mar 2014
23 Citations
Our findings provide useful design guidelines for improving touch typing performance on a zero-travel keyboard with sensory keyclick feedback information.