Title:
ILLUMINATING APPARATUS USING A PLURALITY OF LIGHT EMITTING DIODES, METHOD FOR CONTROLLING THE ILLUMINATING APPARATUS AND IMAGE PROJECTING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2008/093462
Kind Code:
A1
Abstract:
An illuminating apparatus is provided with a light source (16), which emits a plurality
of different color illuminating beams and has a plurality of light emitting diodes
for the colors, respectively, and a controller (26), which controls the value
of a current to be supplied to each light emitting diode of the light source (16)
and increases/reduces the quantity of the illuminating light to be emitted from
the light source (16). The controller (26) controls the value of the current to
be supplied to each light emitting diode, based on efficiency sensitivity, i.e.,
a change rate of the light emitting quantity of each light emitting diode tothe
value of the current supplied to each light emitting diode.
Inventors:
YAMAMOTO MAKOTO (JP)
Application Number:
PCT/JP2007/072700
Publication Date:
August 07, 2008
Filing Date:
November 16, 2007
Export Citation:
Assignee:
OLYMPUS CORP (JP)
YAMAMOTO MAKOTO (JP)
YAMAMOTO MAKOTO (JP)
International Classes:
H05B37/02; F21S2/00; G03B21/00; G03B21/14; H04N9/31; F21Y101/02
Foreign References:
| JP2005091526A | 2005-04-07 | |||
| JP2006004839A | 2006-01-05 | |||
| JP2006303016A | 2006-11-02 | |||
| JP2006318733A | 2006-11-24 |
Attorney, Agent or Firm:
GOTO, Masaki (3-1Kasumigaseki 3-chome,Chiyoda-k, Tokyo 13, JP)
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