Electromechanical grating display system with segmented waveplate
US6476848B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2000 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Dec 21, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/47
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A display system, including: a light source providing illumination; a linear array of electromechanical grating devices of at least two individually operable devices receiving the illumination wherein a grating period is oriented at a predetermined angle with respect to an axis of the linear array wherein the angle is large enough to separate diffracted light beams prior to a projection lens system for projecting light onto a screen; a polarization sensitive element that passes diffracted light beams according to their polarization state; a segmented waveplate for altering the polarization state of a discrete number of selected diffracted light beams wherein the segmented waveplate is located between the linear array and the polarization sensitive element, a scanning element for moving the selectively passed diffracted light beams on the screen; and a controller for providing a data stream to the individually operable devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.