Lighting lamp
US4954937A · kind A · utility
4Cited by
0References
14Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 8, 1989 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Sep 8, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/35
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting lamp is disclosed, comprising a lamp having laminated on the surface of a bulb thereof a display sheet, said display sheet comprising a support having thereon an active layer containing a pigment which is faded by the action of an active light and an active light-adjusting layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.