Self deploying magnifier for a portable computer display screen
US5991150A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1997 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Sep 9, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2200/1613
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention makes the size of the apparent image of the display screen of the display screen larger than the real size. A flat optical magnifier such as a lens of the fresnel type is positioned in an optically enhancing location between the operator and the display screen so that the apparent image at the operator side of the magnifier is greater than the actual image that is present on the display screen. A mechanism is provided for a notebook type portable computer that is passive to a user, folds into the case when the display screen closes over the keyboard and positions a fresnel lens, coplanar with and at a fixed distance from the display screen, when the notebook computer is opened and remains at that fixed distance as the display screen moves to maximum travel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.