Toyota Jidosha Kabushiki Kaisha

Yazaki Corporation

Toyota Shatai Kabushiki Kaisha

Yasushi Ohba

Terumitsu Sugimoto

Masahiro Kasai

Makoto Sunohara

Nobuyoshi Imaeda

Shuuji Satake

Yasuyuki Shigezane

Hiroko Aono

Mitsuaki Maeda

Takeshi Yamashita

Hisanori Katou

Hisanori Kato

A luminance control device and a luminance control method for controlling luminance of a light emitting member are provided in order to reduce the amount of information to be stored while preventing the user from feeling uncomfortable. The CPU divides by the interpolation division number a value obtained subtracting the reference duty ratio from the reference duty ratio so as to calculate an interpolation variation width, and integrates the interpolation variation width to the reference duty ratio every time the interpolation period elapses, and the variation width in the luminance of the LED is therefore reduced, preventing users to feel uncomfortable, which allows for suppressing the amount of information to be stored.

Luminance control apparatus and luminance control method

A vehicle interior illumination device includes an illumination lamp that is provided in a vehicle interior and is configured to be turned on to illuminate the vehicle interior, a detector that detects a condition to have the illumination lamp to be turned on, and a controller that controls a lighting of the illumination lamp. When the condition is detected by the detector, the controller lights the illumination lamp with a first light amount and when the condition is not detected by the detector, the controller lights the illumination lamp with a second light amount smaller than the first light amount.

Vehicle interior illumination device

Growing community of inventors

Makinohara, Japan

Yasushi Ohba