Micro lens array unit having at least one of first and second micro lens arrays movable for changing the effective focal length of the micro lens array unit and liquid crystal display projection device using same
US7825363B2 · kind B2 · utility
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1References
17Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 6, 2008 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Jun 30, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An exemplary MLA unit for use in a projection device is disclosed. The projection device includes an LCD panel. The LCD panel includes a number of pixels each having an opening. The MLA unit includes a first MLA, and a second MLA. The first MLA includes a number of first micro lenses each configured for focusing incident light into the opening of a respective pixel of the LCD panel. The second MLA includes a number of second micro lenses each aligned with a respective first micro lens of the first MLA so as to form a micro lens system. The second MLA is movable so as to change the effective focal length of the lens systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.