Light intensity equalizing element for lighted display panel
US5669700A · kind A · utility
6Cited by
4References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 16, 1996 |
| Grant date | Sep 23, 1997 |
| Priority date | — |
| Expiry date | Feb 16, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F13/0409
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An intensity equalizing element for placement between a number of individual fluorescent tubes in a light panel and the panel image display surface. The element includes a like number of curved surfaces in axial alignment with the individual tubes to reduce variation in observed intensity due to tube spacing. Each curved surface is provided with a non-uniform opaque dot pattern thereon to reduce variation in the intensity of light at the panel display surface and enhance uniformity of light intensity throughout an overlying image display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.