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US 4,553,820 AGranted
Keyboard switch with a mesh of fibers
AssigneeCanon Kabushiki Kaisha
InventorYuji Harada
Life of this patent
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Abstract
This invention discloses a keyboard switch with display function composed of two transparent sheets constituting a pressure operable switch and placed on a display unit. The upper of two transparent sheets is provided with an unflat top surface for avoiding unnecessary reflection.
Claims7
A display keyboard comprising:
- means for displaying information to be entered;
- and
- a keyboard provided on said display means and including:
- a first transparent sheet having at least first and second opposite surfaces;
- a coarse mesh layer comprising filaments provided on said first surface of said first transparent sheet, said coarse mesh layer being disposed to be contacted by an operator's finger;
- a second transparent sheet provided parallel to and spaced a predetermined distance apart from said second surface of said first transparent sheet;
- and
- a pair of transparent electrodes respectively provided on said first and second transparent sheets so as to be opposed to each other;
- wherein the display information is visible through said first and second transparent sheets and said pair of transparent electrodes.
6 more elements
Dependencies are inferred from the claim text.