Patent ID: 9615069
Date: 2017-04-04
CPC Classifications: G03B,H01S,H04N,H05B

Claim:
1. A light source unit comprising: a plurality of elemental light sources each including one or more light emitting elements and one or more drive circuits, and each configured to emit output luminous flux to outside, the one or more drive circuits being provided corresponding to the respective light emitting elements and each being configured to drive corresponding light emitting element, the output luminous flux being configured of radiated light from the one or more light emitting elements; a control circuit configured to control the drive circuits; and a plurality of color band light characteristic measurement sections each configured to receive light of a quantity correlated with light intensity of the output luminous flux to generate color band light characteristic measurement data, wherein a plurality of the light emitting elements in the plurality of elemental light sources include a plurality of light emitting elements different in wavelength band of emission wavelength from one another, the plurality of color band light characteristic measurement sections are provided corresponding to a plurality of the wavelength bands, one or more of the plurality of color band light characteristic measurement sections include a first light intensity measurement section and a second light intensity measurement section, the first light intensity measurement section having first spectral sensitivity characteristics in a corresponding wavelength band and generating first light intensity measurement data as the color band light characteristic measurement data, and the second light intensity measurement section having second spectral sensitivity characteristics different in rate of sensitivity varying against wavelength varying from the first spectral sensitivity characteristics and generating second light intensity measurement data as the color band light characteristic measurement data, the control circuit generates light intensity indicating values correlated with light intensity and wavelength deviation indicating values correlated with deviation from normal wavelength, with use of local color band spectral sensitivity information, based on the first light intensity measurement data and the second light intensity measurement data, the local color band spectral sensitivity information including sensitivity value at the normal wavelength and the rate of sensitivity varying against wavelength varying for each of the first and second spectral sensitivity characteristics, and the control circuit generates color phase indicating values correlated with color of integrated light of the output luminous flux and performs first feedback control on the drive circuits to allow a difference between the color phase indicating values and target values to be small, with use of the wavelength deviation indicating values and local color band color matching function information, the local color band color matching function information including function values of a color matching function at the normal wavelength and rate of the color matching function output varying against wavelength varying.