Projection lens unit for pico-projector
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 6, 2015
Issued Date -
N/A
app pub date -
Dec 13, 2013
filing date -
Dec 30, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Loading Importance Indicators... 
Abstract
A projection lens unit for a pico-projector includes a plurality of plastic lenses and a single glass lens to minimize a change in focal length due to the heat generated inside the pico-projector. The lens array includes:
- a 1st lens with negative (−) refractive power, a 2nd lens with positive (+) refractive power, a 3rd lens with negative (−) refractive power, a 4th lens with negative (−) refractive power, and a 5th lens with positive (+) refractive power, wherein the 1st to 5th lenses are arranged in order from a screen upon which an image is projected, the 1st to 4th lenses are plastic lenses and the 5th lens is a glass lens.
Loading the Abstract Image...
OK
First Claim
Family
Loading Family data...
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully