Display apparatus and an image input apparatus used for the same
US6590548B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1999 |
| Grant date | Jul 8, 2003 |
| Priority date | — |
| Expiry date | Feb 9, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/74
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display apparatus according to one aspect of the first invention includes: an irradiating unit for generating signal light which records information to be displayed; a light-transmitting type screen (or hologram screen) which transmits the signal light input by the irradiating unit to an observer; and a reflection preventing member provided to either both sides, i.e., observer's side and rear side, or any one side, of the light-transmitting type screen (or hologram screen). Further, an image input apparatus according to the second invention used in the above display apparatus includes: an irradiating unit for generating signal light which records information to be displayed; a display unit for projecting the signal light irradiated by the irradiating unit; an image input unit for inputting an desired object which exists at another side of the display unit, through the display unit from one side of the display unit, as an image signal; and a noise eliminating unit for eliminating at least a part of image component except for the desired object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.