Image display apparatus
US5451976A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 13, 1994 |
| Grant date | Sep 19, 1995 |
| Priority date | — |
| Expiry date | Sep 13, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0178
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image display apparatus is described for reducing the possibility of the occurrence of minor discomforts such as headaches, eyestrain, fatigue and the like in users. A symbol indicating distance such as 1m, 3m, or .infin. is displayed on an outer periphery of a virtual image adjusting knob. When the user aligns a mark on the virtual image position adjusting knob with a position corresponding to one of the predetermined symbols, the virtual image is set so as to be displayed at a position corresponding to the symbol. Consequently, the user can more easily recognize the displayed position of the virtual image so that the generation of a minor discomfort due to long term use which is more than necessary of the image display apparatus is substantially reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.