Koito Manufacturing Company, Ltd.

Nippon Sheet Glass Company, Limited

Koito Seisakusho Co., Ltd.

Tsutomu Machida

Toshiyasu Mochizuki

Yasuyuki Amano

Kihachiro Uchida

Hiroshige Shinkai

Masaru Morikawa

Tetsuo Sasajima

Naoki Matsumura

Tsukasa Tokida

Hiroya Koizumi

Atsushi Ozawa

Masaru Sasaki

Tomoyuki Nakagawa

Tomoaki Serizawa

Tadayuki Okuda

Manabu Maeda

Susumu Masuda

Yoshiaki Ishida

Katsumi Muramatsu

A light source unit includes a light emitting element which functions as a light source, a wiring pattern on which the light emitting element is mounted, an electrode pad connected to the wiring pattern, a substrate on which the wiring pattern is formed and the electrode pad is mounted, a power supply body which supplies external power to the electrode pad, and a socket housing which has an engaging portion engaged with a predetermined member and holds the substrate, the light emitting element and the power supply body. The power supply body has a terminal holding portion formed of an insulating resin material and a connection terminal supported by the terminal holding portion and connected to an external power supply. The connection terminal and the electrode pad are connected to each other by a conduction connecting part.

Light source unit and vehicle lamp fitting

A light-emitting diode including a curved surface portionA formed in the front face of a sealing memberwith the cross-sectional shape of the curved surface portion being in the shape of an undulating curve that has a concave curve Cnear the optical axis and convex curves Con both sides of concave curve C, thus allowing the light emitted from a light-emitting chipat a small divergence angle centered on the optical axis Ax to reach the concave curve Cand to be directed forward as diffused light deflected from the optical axis and further allowing the light emitted at a large divergence angle centered on the optical axis Ax to reach the convex curves Cand to be directed forward as light deflected toward line L positioned at the divergence angle &#x3b8;.

Light-emitting diode and vehicular lamp

A vehicular lamp including a light-emitting elementthat emits light at a greater diffusion angle in the lateral direction than in the vertical direction, thus enabling the light to be incident on the rear faceof a horizontally elongated inner lenswith high efficiency. The rear facehas a cylindrical surface that extends in the lateral direction, and the curvature of a convex curve, which forms the cross-sectional shape of the cylindrical surface taken along the vertical plane parallel to the optical axis Ax, gradually reduces according to the increase in the distance from the optical axis Ax in the lateral direction, thus allowing the curvature of the convex curve to be maintained at a substantially constant value in the lateral direction and further preventing the diffusion angle of the light into the lens in the vertical direction from increasing in the lateral direction.

Vehicular lamp

In a light emitting diode having a light emitting chip and a lens portion for containing the chip , the lens portion has a direct light area for use in emitting the light emitted from the chip outside as direct light and a reflected light area for use in emitting the light emitted from the chip and passed through the lens portion toward a reflective member provided outside the lens portion , in which the direct light area is formed so as to have a configuration irrotationally symmetric around the optical axis of an element, and the peripheral portion of the direct light area or the side portion of the lens portion is used as the reflected light area , which is formed so as to have a configuration rotationally symmetric around the optical axis of the element.

Vehicle lamp using light emitting diode

A vehicle lamp unit in which a plurality of light emitting diodes are arranged to make up a light source is disclosed. The lamp unit includes a base member for supporting a plurality of the light emitting diodes, feeder wires that are disposed at the reverse side of the base member and connected to lead terminals of the light emitting diodes, and feeder terminals connected to the feeder wires. The lamp unit advantageously realizes a cost reduction, enhances the degree of design freedom, and promotes environmental protection.

Vehicle lamp unit

A vehicle lamp comprising a lamp body and a light source unit. The lamp body defines a lamp chamber in cooperation with a lens mounted to a front opening of the lamp body. The light source unit in the lamp chamber includes a plurality of light-emitting elements, a base supporting the light-emitting elements, and at least one electric cord. Holders for the light-emitting elements of the light source unit are fit to the base of the light source unit, and the light-emitting elements are electrically connected to the electric cord by holding the electric cord between one of the holders and one of the light-emitting elements.

Vehicle lamp having light-emitting elements with connecting structure

A method for precise design of light distribution for lighting equipment that use light-emitting devices, and for subsequently producing such equipment. By modeling the internal structure of an LED device with respect to the geometry and characteristics of a chip portion, chip reflector and lens portion, illuminating light from an LED device is classified into direct light from the chip portion and the reflected light from the chip reflector. The unknown values necessary for the modeling are specified preliminarily by actual measurements. Subsequently, the original geometry of the lens step is determined roughly based on the target direction and the diffusion angle of the light transmitted through the step. The manner in which the direct light from the chip portion and the reflected light from the chip reflector are transmitted through the lens portion and the lens step is simulated by ray tracing. In addition, the distribution of light is determined and evaluated for its compliance with a desired distribution. If necessary, the geometry of the lens step is modified in accordance with the results of the simulation and the evaluation of light distribution.

Method for optical design of lighting equipment utilizing light-emitting

An automotive signal lamp including a plurality of light emitting diodes arranged along an edge of a base plate disposed within a lamp chamber, a plus line connector formed of a web-like conductive material and extending in an alignment direction of the light emitting diodes, and a minus line connector formed of a web-like conductive material and extending substantially in parallel with the plus line connector, wherein a predetermined number of the light emitting diodes constitute one light emitting diode group, one lead connector of each of the light emitting diodes is integrally formed with one lead connector of the adjacent light emitting diode through a joint piece, an outer lead connector of one utmost light emitting diode of the light emitting diode groups connects to the plus line connector through the short-circuit piece, and an outer lead connector of the other utmost light emitting diode of the light emitting diode group connects to a minus line connector through a resistor which is provided to bridge over the plus line connector.

Automotive signal lamps

A horizontally elongated lamp body of a supplemental high mounted stop lamp is fastened to the rear windowpane of a motor vehicle with looseness in the longitudinal direction of the lamp body relative to the windowpane. Molded from a plastic, the lamp body is therefore capable of thermal expansion or contraction in its longitudinal direction without the danger of detachment from the windowpane.

Device for nondetachably mounting a supplemental high mounted stop lamp

A pair of conductive patterns, which are to be electrically connected to the battery of a motor vehicle, are formed as by baking on the interior surface of the rear windowpane of the vehicle. A pair of nuts or brackets of electrically conductive material are soldered to the conductive patterns. The lamp body of a supplemental high mounted stop lamp are fastened to the nuts or brackets, with the light sources of the lamp electrically connected in circuit therewith.

Device for mounting a supplemental stop lamp or the like to a windowpane

An automobile signal lamp of the type including a light source disposed in a lamp space which is elongated in left and right directions and of a reduced size in vertical directions. A top wall portion and a bottom wall portion constituting the lamp space are formed of synthetic resin material respectively, and are curved in the same direction in the vertical directions, or as viewed in the front view.

Automobile signal lamp

An automobile signal lamp being mounted on the inside of a rear window of an automobile and including a lens member, a body member and a light source member which is disposed in a space defined between the lens member and the body member. Connecting portions are integrally formed on respective lens member and the body member, and which portions cooperate in connecting the lens member with the body member.

Signal lamp for automobiles

Auxiliary vehicle stop light

An automobile lamp of the type including a light source, a lens member and an inner lens member disposed between the light source and the lens member. A mounting portion is integrally formed on the inner lens member, a stepped portion is formed on the lens member, and an edge of the mounting portion is secured to the stepped portion by ultrasonic welding.

Growing community of inventors

Shizuoka, Japan

Tsutomu Machida