Three dimensional video screen display effect
US4517558A · kind A · utility
200Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 3, 1982 |
| Grant date | May 14, 1985 |
| Priority date | — |
| Expiry date | May 3, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S345/905
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A three dimensional visual effect of rotating mechanical reels is given to a two dimensional display on a video screen by using a film having a continuous tone gradient from dark to light, the darkest portions extending along the upper and lower edges of the film, respectively, with the lightest adjacent the center of the film. The film is placed over the video screen images so that the darkened tone gradients of the film are over the upper and lower portion of the display, and the lighter portion of the film at the center is over the center of the display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.