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Light source unit and projector

  • US 10,191,362 B2
  • Filed: 02/06/2017
  • Issued: 01/29/2019
  • Est. Priority Date: 08/08/2014
  • Status: Active Grant
First Claim
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1. A light source unit, comprising:

  • a plurality of elemental light sources each including light emitting elements and drive circuits, the light emitting elements that emit light of an emission wavelength including a plurality of different wavelength bands, and the drive circuits respectively driving the light emitting elements;

    an integrated control circuit that controls the drive circuits; and

    band optical characteristic acquisition sections that receive light of an amount correlated with a total light amount of output luminous fluxes, acquire light emitting intensity indicating values correlated with light intensity for the respective different wavelength bands and acquire wavelength deviation indicating values correlated with deviation from a reference wavelength for one or more of the different wavelength bands, the output luminous fluxes being collection of light beams emitted from light emitting elements,wherein the integrated control circuit at least intermittently acquires band optical characteristic acquisition data and generate the light emitting intensity indicating values and the wavelength deviation indicating values, the band optical characteristic acquisition data being generated by the band optical characteristic acquisition sections,the integrated control circuit holds light emitting intensity indicating value target variation information, the light emitting intensity indicating value target variation information being used to reduce difference between color phase indicating values correlated with the integrated light color of the output luminous fluxes and target color phase indicating values by feedback control of the drive circuits, the feedback control being performed to reduce difference between the light emitting intensity indicating values and target light emitting intensity indicating values for the respective different wavelength bands, and the light emitting intensity indicating value target variation information being used for determination of variation of the light emitting intensity indicating values with respect to the target light emitting intensity indicating values for the respective different wavelength bands matched to each of assumed appearance modes of the wavelength deviation indicating values, andthe integrated control circuit determines the variation of the light emitting intensity indicating values for the respective different wavelength bands, in accordance with the light emitting intensity indicating value target variation information belonging to one appearance mode assumed on a basis of an actual mode of the generated wavelength deviation indicating values, out of the appearance modes of the wavelength deviation indicating values.

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