Lighting apparatus and light emission control method

摘要

A lighting apparatus includes: a plurality of light emission units that respectively emit lights in luminescent colors different from each other; and a control unit that controls in luminance the respective light, which are emitted from said plurality of light emission units, for the respective luminescent colors. In response to a control input, said control unit switches between a first light emission mode that it makes said light emission units emit light with luminance set for the respective luminescent colors and a second light emission mode that makes it light emission units corresponding to at least one luminescent color turn off or emit light with luminance lower than the luminance in the first light emission mode.

主权项

1. A lighting apparatus comprising;
a plurality of light emission units for emitting lights in luminescent colors different from each other; and a control unit controlling in luminance the respective lights emitted from each of said plurality of light emission units, for the respective luminescent colors, wherein, in response to a control input, said control unit switches between a first light emission mode in which said light emission units emit light with luminances set for the respective luminescent colors and a second light emission mode in which light emission units corresponding to at least one luminescent color are turned off or emit light with a luminance lower than the luminance in the first light emission mode; for the lighting apparatus in the second light emission mode, each of the plurality of light emission units includes a luminance ratio defined as a ratio of a luminance of the second light emitting mode (B2) to a luminance of the first light emitting mode (B1), wherein the luminance ratio is different for different luminescent colors of light emission units, and a life of each of the light emission units is determined based on a color of the light emission unit; the control unit determines a light emission pattern for each of the plurality of light emission units, the light emission pattern comprising emitting one of the light emission units having a shorter life than other ones of the light emission units having a longer life, at a reduced luminance ratio that is less than the luminance ratios of the other ones of the light emission units; and in the second light emission mode, the control unit generates feeding driving currents to each of the plurality of light emission units to control the luminance of the luminance of the respective lights, based on the determined light emission pattern.