| 摘要 |
PROBLEM TO BE SOLVED: To reduce variation in light emitting colors between a plurality of light emission modules without causing the complication and size increase of a circuit arrangement and increase in current consumption, etc. SOLUTION: When color mixture light emission is performed by simultaneously driving light emission modules 40L, 40R, the variation in the light emitting colors between the light emission modules is made inconspicuous by devising a light emission pattern. For example, light emission is performed in one color and after that, transited to the color mixture light emission. In addition, when a ratio of color mixture is changed, after fixing light emitting luminance of an LED which emits light in a base color, light emitting luminance of other LEDs is gradually changed and an upper limit is provided in change of the light emission when in the case of gradually changing the light emitting luminance. An upper limit is set to color mixture light emitting time by the same luminance and the whole light emitting period from the start to the end of the color mixture light emission is set shorter as color mixture light emitting time by the same luminance is longer. COPYRIGHT: (C)2005,JPO&NCIPI
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