Optical unit sealing devices for projection television sets
US6496232B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 2000 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | May 15, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection television set having a screen and three projection units each capable of projecting a monochromatic image onto the screen. The projection units each having a cathode ray tube (CRT) optically coupled to a projection lens, which includes both a C-lens and a compound lens. A spacer preferably having three optical passageways is coupled to and between the CRTs and projection lenses such that three coolant chambers are formed. Preferably, the spacer includes fluid passageways that interconnect the coolant chambers. Additionally, the packing members used to seal the coolant chambers preferably include position or alignment retaining components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.