Koito Manufacturing Company, Ltd.

Syouhei Yanagidu

Takao Muramatsu

Masayasu Ito

Takeshi Masuda

Hidetada Tanaka

Satoshi Kikuchi

Michihiko Hayakawa

Hiroaki Hara

Takayoshi Ishizuka

Naoki Sugiura

In one embodiment of the vehicular display system, the drawing unit operates when the vehicle speed is within a predetermined low speed area, starts an operation thereof when the vehicle speed becomes above a lower limit of the low speed area, and stops the operation thereof when the vehicle speed exceeds an upper limit of the low speed area.

Vehicular display system

There is provided a driving device which is used together with a light source including a plurality of light emitting units connected in series to configure a vehicle lamp. The driving device includes a current source which is configure to supply a drive current to the light source, and N bypass circuits which are provided in parallel to N light emitting units, respectively. Each of the bypass circuits includes a bypass transistor which is provided in parallel to a corresponding light emitting unit, a feedback capacitor which is provided between a gate and a drain of the bypass transistor, and a gate drive circuit which is configured to supply a drive voltage between the gate and a source of the bypass transistor according to a control signal.

Vehicle lamp and vehicle lamp driving device

Growing community of inventors

Shizuoka, Japan

Syouhei Yanagidu