Projection lens unit for pico-projector
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United States of America Patent
Stats
-
Oct 9, 2012
Grant Date -
Aug 18, 2011
app pub date -
Mar 29, 2010
filing date -
Feb 18, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
There is provided a projection lens unit for a pico-projector which comprises a lens array, a color composition prism, a cover glass and an image panel, the projection lens unit characterized in that: the lens array includes 1st to 6th lenses sequentially arrayed from a screen on which an image is projected, the 1st lens includes a stop side formed on a 1st side of the 1st lens, the stop side stops the passage of light, to perform the function of a diaphragm aperture, light passing from the 1st lens to the 6th lens travels in only one direction of the lens sides based on the diaphragm aperture, and parts of the lens sides through which the light does not pass are cut so that the whole height of the lens array is reduced.
First Claim
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International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 2 Citation Count
- G02B Class
- 4.33 % this patent is cited more than
- 13 Age
