Projection system with an offset lens array to reduce vertical banding
US6618202B2 · kind B2 · utility
2Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 2001 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | May 29, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3152
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The mechanism of and a solution to the problem of vertical banding in projection systems is disclosed. An offset lens array includes a plurality of lens elements arranged in a plurality of rows that are offset with respect to one another. The offset lens array is incorporated in an illuminator for a projection system. The asymmetrical arrangement of the rows of lens elements in the array with respect to a seam in a color separation element of the projection system substantially reduces the vertical banding in the projected image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.