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US 4,060,703 AGranted
Keyboard switch assembly with tactile feedback having illuminated laminated layers including opaque or transparent conductive layer
OwnerSeth Leroy Everett, Jr.inventor
Life of this patent
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Abstract
A sandwich type computer keyboard with keys characterized by a tactility to provide a positive degree of tactile feedback to an operator and having an electroluminescent panel for illuminating the keyboard panel.
Claims14
A sandwich type computer keyboard comprising:
- a bezel having parallel arranged apertures;
- a first mylar sheet having a raised tactile bubbled surface, the bubbles being arranged and spaced to correspond to said apertures and dimensioned to pass through said apertures and extend beyond the upper bezel surface;
- a flexible electroluminescent panel;
- a flexible electrical conductive sheet adjacent said electroluminescent panel;
- a first apertured insulator sheet intermediate said electroluminescent panel and said first mylar sheet;
- a printed circuit board having respective conductors thereon arranged to be aligned and correspond with the tactile bubbled surface on said first mylar sheet;
- and
- a second apertured insulator sheet intermediate said conductive sheet and said printed circuit board;
- the apertures in said first and second insulator sheets being aligned with and corresponding to the tactile bubbled surface on said first mylar sheet.
6 more elements
A sandwich type computer keyboard comprising:
- a bezel having parallel arranged apertures;
- a first mylar sheet having a raised tactile bubbled surface, the bubbles being arranged and spaced to correspond to said apertures and dimensioned to pass through said apertures and extend beyond the upper bezel surface;
- a stiffener sheet having a tactile bubbled surface nestled within the concave surface of each of the bubbles on said first mylar sheet;
- a transparent electrical conductive coating on the concave surfaces of the bubbles on said stiffener sheet;
- a light transmissive printed circuit sheet having respective transparent conductors thereon arranged to correspond with the tactile bubbled surface on said first mylar sheet;
- an apertured insulator spacer sheet intermediate said printed circuit sheet and said stiffener sheet;
- the apertures in said insulator spacer sheet corresponding to the tactile bubbled surface of said first mylar sheet;
- and an electroluminescent panel proximal said printed circuit sheet.
5 more elements
Dependencies are inferred from the claim text.