Coupler fluids for projection televisions
US6268458A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1999 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | Sep 3, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/7425
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Coupling fluids for use in optically coupling a projection lens system of a projection television to a cathode ray tube (CRT (16)) are provided. The fluids have: (1) at least one polymer having a siloxane backbone, i.e., at least one polymer having a --Si--O--Si--O--Si-- backbone, and (2) methyl, phenyl, and hydrophilic groups attached to the silicon atoms of the backbone. The fluid can be composed of a single siloxane polymer having methyl, phenyl, and hydrophilic side groups or a mixture of a siloxane polymer having methyl and phenyl side groups with a siloxane polymer having methyl and hydrophylic side groups. The index of refraction of the fluid is preferably greater than 1.52 so as to minimize reflections at the interface between the fluid and the faceplate (17) of the CRT (16).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.