Display with supplemental lighting system
US4754275A · kind A · utility
15Cited by
14References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1987 |
| Grant date | Jun 28, 1988 |
| Priority date | — |
| Expiry date | Dec 9, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A display device has a single switch that transfers a stored message to a liquid crystal display and simultaneously activates a supplemental display lighting system. The supplemental lighting system is inhibited, however, when circuitry senses that ambient light conditions are sufficient to illuminate the display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.