| 摘要 |
PROBLEM TO BE SOLVED: To facilitate a color temperature adjustment for a surface light-emitting lighting device.SOLUTION: A color temperature adjustment method for a surface light-emitting lighting device includes a step for producing a surface light-emitting lighting device in which a light guide plate, a light source for emitting light into the light guide plate, a light reflection plate and/or light diffusion plate, disposed in contact with the light guide plate, are included, and a step for measuring a color temperature on a light-emitting surface of the produced surface light-emitting lighting device. If the measured color temperature is different from a desired color temperature, a step for selecting ink for coloring on the light reflection plate and/or the light diffusion plate, a step for applying color printing using the selected ink on the light reflection plate and/or the light diffusion plate with an ink-jet printer, and a step for measuring a color temperature on the light-emitting surface of the surface light-emission lighting device using the colored light reflection plate and/or light diffusion plate, are performed. A step for modifying color on a light reflection plate and/or light diffusion plate is repeated until a measured color temperature on the light-emitting surface of the surface light-emitting lighting device becomes within an allowable range. |
