Image processing type of measuring device, lighting system for the same, lighting system control method, lighting system control program, and a recording medium with the lighting system control program recorded therein

A lighting system control method of controlling a lighting system comprising a plurality of luminescent light sources emitting lights with different colors respectively, an impressed current control mean for controlling impressed currents to said plurality of luminescent light sources, and an input device for inputting instruction values to instruct the luminous intensity for the purpose to generate synthesized lighting with the luminous intensity and preset chromaticity instructed by the instruction values by synthesizing lights emitted from the luminescent light sources, said method comprising:

• a light source characteristics measuring step of measuring the luminous intensity and chromaticity in relation to a value of the current impressed to each of said plurality of luminescent light sources;
• a mixing ratio computing step of computing a ratio of intensities of lights emitted from said plurality of luminescent light sources required for synthesizing synthesized lighting with the luminous intensity instructed by said instruction values and the preset chromaticity with the theoretical equation for computing a mixing ratio of intensities of the lights required for synthesizing a synthesized color with the preset chromaticity from a plurality of lights each with the different chromaticity in response to changes in the chromaticity corresponding to changes in luminous intensities of said luminescent light sources measured in said light source characteristics measuring step;
• a luminous intensity computing step of computing the luminous intensities of said plurality of luminescent light sources for generating the luminous intensity instructed by the instructed value from said mixing ration computed in said mixing ratio computing step;
• and
• an impressed current value read-out step of reading said impressed current values required to make said plurality of luminescent light sources emit lights with the luminous intensities computed in said intensity computing step from the characteristics of said plurality of luminescent light sources obtained in said luminescent light source characteristics measuring step.

A lighting system control program used in a computer incorporated in a lighting system having a plurality of luminescent light sources each emitting light with a different color, an impressed current control unit for generating synthesized lighting with the preset luminous intensity and chromaticity by synthesizing lights from said luminescent light sources by means of controlling an impressed current to each of said luminescent light sources, and an input device for inputting an instruction value for instructing luminous intensity of lighting, said lighting system control program making the computer execute:

• a light source characteristics measuring step of measuring luminous intensity and chromaticity in correlation to said impressed current value for each of said luminescent light sources;
• a mixing ratio computing step of computing a mixing ratio of intensities of lights emitted from said luminescent light sources required for synthesizing synthesized lighting with the preset chromaticity at the luminous intensity instructed by said instruction value through the theoretic equation for computing changes in chromaticity in response to changes in luminous intensity of each of said luminescent light sources measured in said light source characteristics measuring step and a mixing ratio of intensities of lights with different colors required for synthesizing a synthesized color at the preset chromaticity from colors each at different chromaticity;
• a luminous intensity computing step of computing luminous intensity of each of said luminescent light sources required for generating the luminous intensity instructed by said instruction value from said mixing ratio computed in said mixing ratio computing step;
• and
• an impressed current value read-out step of reading said impressed current value required for making each of said luminescent light sources at the luminous intensity computed in said luminous intensity computing step from the characteristics of said luminescent light sources obtained in said light source characteristics measuring step.

A lighting system comprising luminescent light sources each for emitting light with a different color, an impressed current control unit for controlling an impressed current to said luminescent light sources, and an input device for inputting an instruction value for instructing luminous intensity of lighting, said lighting system generating synthesized lighting with the preset luminous intensity and chromaticity by synthesizing lights emitted from said luminescent light sources, wherein said impressed current control unit comprises:

• a light source characteristics measuring device for measuring and storing data concerning luminous intensity and chromaticity in response to said impressed current value for each of said luminescent light sources;
• a mixing ratio computing device for computing a mixing ratio of intensities of lights emitted from said luminescent light sources required for synthesizing synthesized lighting with the preset chromaticity at the luminous intensity instructed by said instruction value through the theoretical equation for computing changes in chromaticity in response to changes in luminous intensities of said luminescent light sources measured in said light source characteristics measuring device and a mixing ratio of intensities of lights with different colors required for synthesizing a synthesized color with the preset chromaticity from a plurality of colors each with different chromaticity;
• a luminous intensity computing device for computing luminous intensity of each of said luminescent light sources for generating the luminous intensity instructed by said instruction value from said mixing ratio computed by said mixing ratio computing device;
• an impressed current reader for reading said impressed current value for making each of said luminescent light sources emit light with the luminous intensity computed by said luminous intensity computing device;
• and
• an instruction value/current value table storing unit for storing an instruction value/current value table in which said impressed current value read by said impressed current reader is correlated to said instruction value.