Toshiba Lighting & Technology Corporation

Atsushi Heike

Daisuke Kosugi

A vehicle lighting device includes a plurality of circuit portions that have at least one light emitting element; and a control portion that is electrically connected to the plurality of circuit portions. The control portion detects an input voltage and connects the plurality of circuit portions in series when the detected input voltage exceeds a predetermined value and connects at least a part of the plurality of circuit portions in parallel when the detected input voltage is equal to or less than the predetermined value.

Vehicle lighting device including circuit portions having at least one light emitting diode, and control portion that controls connection state of circuit portions

A light emitting device for a vehicle includes a substrate; a light emitting element which is provided on the substrate; a resistive element which is provided on the substrate, and connected in series with the light emitting element; and a thermistor which is provided on the substrate. The thermistor has a positive temperature coefficient, and is connected in parallel with the resistive element.

Light emitting device for vehicle, lighting device for vehicle, and lighting tool for vehicle

According to one embodiment, a vehicle lighting device includes a plurality of circuit portions each of which has at least one light emitting element; and a control portion that is electrically connected to the plurality of the circuit portions. The control portion connects the plurality of the circuit portions in series if an input voltage exceeds a predetermined value, and connects at least a part of the plurality of the circuit portions in parallel if the input voltage is equal to or less than the predetermined value. The predetermined value is a value equal to or more than a voltage corresponding to a current value used for failure determination of the vehicle lighting device.

Vehicle lighting device and vehicle lamp

According to one embodiment, a vehicular lighting device includes a socket, a substrate provided on one end side of the socket, at least one light emitting element provided on the substrate, a Zener diode provided on the substrate, and a controller provided on the substrate. The controller shuts off a current flowing through the light emitting element based on a voltage or a current on an anode side of the Zener diode.

Vehicular lighting device and vehicular lamp

According to one embodiment, a vehicle lighting device includes a first circuit portion that has at least one light emitting element and a first resistor connected in series to the light emitting element; a second circuit portion that is connected in parallel to the first circuit portion and has at least a control portion; and a third circuit portion that is connected in series to the first circuit portion and the second circuit portion, and has at least one light emitting element. The control portion measures an input voltage and causes a current to flow through the third circuit portion in a case where the measured input voltage is a predetermined value.

A vehicle interior lighting device according to an embodiment includes a housing, a cover provided on one end portion side of the housing, a light-emitting section provided on the inside of the housing, and a detecting section provided on the inside of the housing and configured to detect, via the cover, a change in energy involved in a motion of an operator and convert the detected change in the energy into an electric signal.

Growing community of inventors

Yokosuka, Japan

Atsushi Heike