Integrally driven three beam-type projection apparatus
US5648878A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1996 |
| Grant date | Jul 15, 1997 |
| Priority date | — |
| Expiry date | Mar 28, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/74
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a three beam-type projection apparatus in which three projectors can be transported integrally by a single driving motor. A first and a second projecting lenses are formed in the front of first and second projectors, respectively. First and second guiding grooves are formed thereon. The two projectors are connected by a plurality of guiding rods. A third projecting lens is formed in the front of a third projector and an inserting hole is formed on the lower portion of the third projector. A guiding plate is combined with the first, second and third projectors, and is transported forward and backward by a driving apparatus. A fixing plate is provided with a parallel guiding hole formed along the length of the third projector and with an inclined guiding hole for guiding the transportation of the third projector. The three projectors can be transported by a driving motor and the operation of the apparatus is very accurate and advantageous.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.