Variable Color Illumination Apparatus
First Claim
1. A variable color illumination apparatus operating in an ordinary lighting mode for simultaneously turning on respective light sources and in a light quantity adjustment mode for adjusting light quantities of the respective light sources, the variable color illumination apparatus comprising:
- light sources (15) of at least two colors for composing light, a control device (30, 21 to 23) for independently performing light adjustment of said respective light sources, single light receiving device (80) for detecting light emitting amounts of the light sources, a memory device (70) for storing a light quantity ratio of each of said plurality of light sources preset for obtaining a desired light color, and a processing device (50;
51 to 58) for finding a difference between a light quantity ratio preset for obtaining a desired light color stored in said memory device and a light emitting amount detected at said light receiving device, said control device simultaneously driving said light sources in said ordinary lighting mode, said control device sequentially driving said plurality of light sources at time intervals in said light quantity adjustment mode, said processing device finding the difference between a light quantity ratio preset for obtaining a desired light color stored in said memory device for a light source driven at that time and a light emitting amount of said driven light source detected at said light receiving device and transmitting the difference to said control device (30), and said control device driving the light source by using the input difference as correction output of said driven light source so as to control the light emitting amount of the light source.
1 Assignment
0 Petitions
Accused Products
Abstract
To provide a variable color illumination apparatus enabling illumination with a suitable colors even when characteristics change in accordance with aging or other aspects of the environment and having a reproducibility of colors stable for a long period. The variable color illumination apparatus has light sources (15) of at least two colors, a control device (30) for independently performing light adjustments of the respective light sources (15), one light receiving device (83) for detecting light emission amounts of light sources (15), a memory device (71) storing light quantity ratios of the respective light sources (15) preset for obtaining desired light colors, and a central processing unit (50) for finding changes between light quantity ratios of the respective light sources (15) detected at the light receiving device (83) and preset light quantity ratios and outputting the changes as correction outputs to the control device (30).
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Citations
5 Claims
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1. A variable color illumination apparatus operating in an ordinary lighting mode for simultaneously turning on respective light sources and in a light quantity adjustment mode for adjusting light quantities of the respective light sources,
the variable color illumination apparatus comprising: -
light sources (15) of at least two colors for composing light, a control device (30, 21 to 23) for independently performing light adjustment of said respective light sources, single light receiving device (80) for detecting light emitting amounts of the light sources, a memory device (70) for storing a light quantity ratio of each of said plurality of light sources preset for obtaining a desired light color, and a processing device (50;
51 to 58) for finding a difference between a light quantity ratio preset for obtaining a desired light color stored in said memory device and a light emitting amount detected at said light receiving device,said control device simultaneously driving said light sources in said ordinary lighting mode, said control device sequentially driving said plurality of light sources at time intervals in said light quantity adjustment mode, said processing device finding the difference between a light quantity ratio preset for obtaining a desired light color stored in said memory device for a light source driven at that time and a light emitting amount of said driven light source detected at said light receiving device and transmitting the difference to said control device (30), and said control device driving the light source by using the input difference as correction output of said driven light source so as to control the light emitting amount of the light source. - View Dependent Claims (2, 3, 4, 5)
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Specification