# US 6,719,432 B2 · Optical assembly for rear projection television

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- Number: US 6,719,432 B2
- Document ID: US6719432B2
- Status: Granted
- Kind: B2
- Application number: 10/248,276
- Filed: 2003-01-06
- Published: 2003-07-17
- Granted: 2004-04-13
- Earliest claimed: 2002-01-11
- Assignees: Coretronic Corporation
- Inventors: Kuo-Wen Chen; Fan-Chieh Chang; Chen-Wen Yang
- Web page: https://patentgrep.com/patent/US6719432B2

## CPC

- G03B 21/22: Soundproof bodies
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)

## Abstract

The present invention comprises a carrier, an optical engine disposed on the carrier, and a hood member coupled to the carrier at the front end of the optical engine. The hood member has an inlet coupled to the optical engine and an outlet sealed with a screen. At least one mirror is placed in an optical path between the optical engine and the screen for reflecting a beam from the optical engine, and is disposed with an adjusting bolt at its backside for adjusting. The hood member wraps the optical path from the optical engine to the screen for keeping the optical engine outside and preventing the external dust, moisture, and temperature.

## Claims

### Claim 1

An optical assembly for rear projection television, comprising:
carrier;
an optical engine coupled to the carrier for projecting optical information;
a screen receiving and displaying the optical information projected by the optical engine;
at least one mirror which is placed in an optical path between the optical engine and the screen, the mirror being disposed with an adjusting bolt at its backside for adjusting; and
a hood member which has an inlet and an outlet and is fixed to the carrier, the inlet being coupled to the optical engine, the outlet being sealed with the screen, the hood member wrapping the optical path from the optical engine to the screen.