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Patent Searching and Data


Title:
LIGHT SOURCE DEVICE AND PROJECTOR
Document Type and Number:
WIPO Patent Application WO/2016/039104
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a light source device and a projector which enable the hue of an output light flux to maintain a target hue by feedback control. In the present invention, a light emitting element includes ones having emission wavelengths belonging to multiple kinds of different wavelength bands, and has first, second and third light amount measurement means, the sensitivity values and rates of change in sensitivity with respect to changes in wavelength at respective reference wavelengths of spectral sensitivity characteristics of the first, second and third light amount measurement means match the sensitivity values and rates of change in sensitivity with respect to changes in wavelength at the same respective reference wavelengths of three color matching functions of an XYZ color system, and a control circuit generates a hue indication value correlated with the color of light, assumes a plurality of appearance modes regarding the appearance mode of a difference between the hue indication value and a target value thereof in order to feedback control a drive circuit such that the difference from the target value becomes smaller, thereafter holds information relating to the determination modes of the amounts of change of emission intensity indication values, and selects, from among the assumed plurality of appearance modes of the difference, one similar to the mode of the difference between the generated hue indication value and the target value thereof.

Inventors:
OKAMOTO MASASHI (JP)
SAMEJIMA TAKANORI (JP)
ODA FUMIHIKO (JP)
Application Number:
PCT/JP2015/073335
Publication Date:
March 17, 2016
Filing Date:
August 20, 2015
Export Citation:
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Assignee:
USHIO ELECTRIC INC (JP)
International Classes:
H01S5/0687; F21S2/00; F21V9/16; F21V9/40; F21V23/00; G02F1/133; G03B21/00; G03B21/14; G09G3/20; G09G3/34; H04N9/31
Domestic Patent References:
WO2015119184A12015-08-13
Foreign References:
JP2007156211A2007-06-21
JP2012119141A2012-06-21
JP2006146033A2006-06-08
JP2008160441A2008-07-10
JP2011089840A2011-05-06
JP2014187465A2014-10-02
Attorney, Agent or Firm:
OHI, Masahiko (JP)
Masahiko Oi (JP)
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