Circular display device with a projective light source
US7123811B1 · kind B1 · utility
44Cited by
11References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2005 |
| Grant date | Oct 17, 2006 |
| Priority date | — |
| Expiry date | Sep 1, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S385/901
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circular display includes a columnar waveguide plate and an image projection device. The upper width of the cross-section of the columnar waveguide plate is less than the bottom width of the cross-section of the columnar waveguide plate. The outer surface of the columnar waveguide plate is utilized for displaying an image, and the image projection device is used for projecting the image to the bottom of the columnar waveguide plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.