Honda Motor Co., Ltd.

Rohm Co., Ltd.

Koito Manufacturing Company, Ltd.

Yosuke Tsuchiya

Masaaki Nakayama

Yoshihisa Hirose

Akira Aoki

Shigeru Kodaira

Nobuyuki Takenaka

Tsuyoshi Oguchi

Yosuke Koike

Kazuhiko Mori

Akihiko Yamashita

Kouji Miyamoto

Norikazu Saito

Koji Okamoto

Masaharu Ando

Koji Hanai

A driving device for driving an in-vehicle lighting device in which a plurality of light sources are arranged in one direction, comprising a detection unit configured to detect an environment of a vehicle, and a driving unit configured to drive the plurality of light sources in sequence in the one direction, wherein the driving unit drives the plurality of light sources so that driving timings of the plurality of light sources will change in accordance with a detection value obtained by the detection unit.

Driving device, lighting device, and vehicle

A vehicular lamp device includes a horizontal rectangular lamp body and reflects irradiation light of light sources with a reflector unit for outward irradiation via an outer lens. Four reflector portions of the reflector unit have long side reflectors and short side reflectors. The long side reflectors are contiguously arranged in the long side direction at the positions toward the long sides of the lamp device. The short side reflectors are contiguously arranged in the short side direction at the positions toward the short sides of the lamp device. Light sources are each positioned toward the center of each reflector portion in front view of the lamp device. Border lines between the long side reflectors and short side reflectors are formed along inclined lines inclined to extend from near the light sources relative to the long side direction.

Vehicular lamp device

To provide a light device that can suppress the heat influence. In a tail light having LED chips, an electronic component that turns on the LED chips, and a first substrate, and a second substrate, and a third substrate on which the LED chips and the electronic component are disposed, a plurality of the first substrate, the second substrate, and the third substrate are independently provided, and are spaced from one another.

Light device

A lighting system capable of reducing a number of components and cost is provided. A back substrate, a lamp body including front support columns that guide and position the back substrate when the back substrate is attached, and a front substrate that is disposed in the lamp body to be stacked on the back substrate and is fixed to tip end portions of the front support columns are included. The front support columns perform guide and positioning of the back substrate, and fixing of the front substrate, and thereby the number of components and cost of the lamp body are reduced, as compared with a case where the guide portions, positioning portions and fixing portions of the back substrate and the front substrate are individually provided respectively.

Lighting system

Fresnel lenses are arranged between a board and an outer lens in such a manner as to face at least one of LED chips. The Fresnel lenses are arranged close to a center of the outer lens in front view. Convex and dome-shaped lenses are arranged between the board and the outer lens in such a manner as to face other light sources of the LED chips. The dome-shaped lenses are arranged more radially outward than the Fresnel lenses in front view. Rear surfaceof the dome-shaped lenses are arranged to be offset toward the LED chips relative to rear surfaces of the Fresnel lenses.

Vehicle lighting apparatus with Fresnel lens and convex lens array

An LED lighting device system for a vehicle prevents erroneous lighting of the LED lighting device due to leakage current at fee operation switch. An LED lighting device system for a vehicle is provided with an LED lighting device having an LED light source, an operation switch for lighting and extinguishing the LED light source, and a power source that is connected to the input side of the operation switch and feeds electrical current to the LED light source. The LED light device system for a vehicle has a switching element capable of blocking electrical current flowing to the LED light source and a detection unit that detects voltage on the output side of the operation switch and causes the switching element to block the electrical current.

Vehicle LED lighting device system

A switch-operation-determining device provided with a determination circuit for determining whether a switch has been operated, wherein the determination circuit is provided with: a first resistor, a first diode, and a second diode serially connected in the stated order from the power-source side, such that current flows from the power source toward a ground; and a control unit for comparing the anode potential of the first diode and a threshold potential, and determining that the switch has been operated when the anode potential of the first diode is lower. Of the first diode and the second diode, it is the second diode that is connected in parallel with the switch.

Switch-operation-determining device

A leakage current detection circuit detects a switch current flowing in a switch which is targeted for leakage monitoring, and generates a detection signal to prohibit operation of a control target circuit which is targeted for control when the switch current does not reach a predetermined threshold value.

Leakage current detection circuit, semiconductor apparatus, LED illumination apparatus, and vehicle

A vehicle LED lighting device includes a drive control meansincludes an abnormality detection meansdetecting a disconnection or short-circuit abnormality of the LED lamp, the abnormality detection meansincludes a current detection unitdetecting the value of a current flowing through the LED lampsandwhen the LED lampsandare driven by the drive control means, a comparison unitcomparing the current value detected by the current detection unitwith a predetermined abnormality determination value, and a determination value switching unitswitching the abnormality determination value in accordance with variation of a power supply voltage of the vehicle, and whether or not there is the disconnection or short-circuit abnormality is judged based on the abnormality determination value switched by the determination value switching unitand the detected current value.

Vehicle LED lighting device

A single board is adaptable to lamps for a vehicle of various designs. A lamp for a vehicle includes: an LED light source; a board having a mounting portion on which the LED light source is mounted; and a reflector member which is arranged such that the reflector member covers the LED light source, the reflector member reflecting light emitted from the LED light source with the directivity, wherein the mounting portion is formed of a plurality of mounting portions which are arranged at least in one direction out of the vehicle longitudinal direction and the vehicle lateral direction such that the arrangement of the LED light source is selectable from plural kinds of arrangements, and the reflector member is detachably attached to the board such that the reflector member having a shape corresponding to the arrangement of the LED is selectable.

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Wako, Japan

Yosuke Tsuchiya