Optical assembly for television front screen
US5534951A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 17, 1994 |
| Grant date | Jul 9, 1996 |
| Priority date | — |
| Expiry date | Aug 17, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/8911
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical assembly device (10) for use in front of a television screen having a diagonal dimension of S, which optical assembly comprises four panels (12 to 15) connected together to form a hollow body (11) having a substantially rectangular open front side (16) of width W and the height H and a substantially rectangular open rear side (17) of width W' and height H', the separation between the front and rear sides (16 and 17) being D and the inner sides of the panels being reflective. The optical assembly (10) further comprises front and rear lenses (18 and 19) provided extending across the open front and rear sides (16 and 17), respectively, of the body (11), the front side of the rear lens (19) being reflective, wherein the dimensions are related according to the following formulae: PA1 (1) W=[1+(W'/H'-B)].multidot.W' PA1 (2) H=[1+(W'/H'-B)].multidot.H' PA1 (3) D=K.multidot.S Where: PA1 (i) B=(.sqroot.5-1)/2 PA1 (ii) 0.1<K<0.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.