Lighted key board
US6092903A · kind A · utility
Inventor
Key dates
| Filing date | Sep 25, 1998 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Sep 25, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2219/062
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A lighted keyboard comprising numerous small grain of wheat type lamps embedded in translucent mounting blocks fixedly positioned between keypads wherein the keypads are constructed of translucent material with a reflective back coating so that when the keypads are in their upper most position the keypad translucent material contacts the fixedly secured translucent block thereby allowing light to be transmitted from the translucent block into the keypad however when the keypad is depressed lighting is blocked resulting in a darkened keypad. The intensity of the lighting system is also automatically controlled by ambient light conditions wherein increased ambient light results in lower voltage supply to the numerous small grain of wheat type lamps and wherein increased ambient light decreases voltage to the grain of wheat type lamps. The lighted keyboard is also equipped with a manual resistor switch allowing a user to manually adjust the intensity of the keyboard lighting if desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.