Real image display device with wide viewing angle
US8040617B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 29, 2008 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Aug 29, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N13/346
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A 3-dimensional image display device having wide viewing angles using Fresnel lenses is disclosed. According to an embodiment of the invention, the 3-dimensional image display device includes an image source providing part for providing an image source, a first Fresnel lens refracting and transmitting the image source that is incident from the image source providing part, and a second Fresnel lens for generating a 3-dimensional image by refracting and transmitting the image source transmitted from the first Fresnel lens. At least one of the first Fresnel lens and the second Fresnel lens is a curved type Fresnel lens surface. The present invention can maximize the display area for a 3-dimensional image and realize the 3-dimensional image having wide viewing angles without distortion on the left and right boundaries.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.