Rohm Co., Ltd.

Iris Ohyama Inc.

Toshio Watanabe

Yusaku Kawabata

Toshiyuki Fujita

Hideharu Osawa

Hiroshi Fukumoto

Hirotaka Shimizu

Hiroyuki Fukui

Takao Iemoto

A lighting device includes a substrate having a side extending straight in a first direction and a first LED chip supported by the substrate and having a first anode terminal and a first cathode terminal. The lighting device includes a second LED chip and a third LED chip supported by the substrate, being electrically connected to the second cathode terminal, and being overlapped with the first LED chip when viewed in a second direction that is perpendicular to the first direction. The lighting device includes a connecting portion that connects the first cathode terminal and the second anode terminal with each other, at least a portion of the connecting portion angled at an acute angle with respect to the second direction.

Lighting device

An LED lamp Aincludes a plurality of LED modulesand a substrateon which the LED modulesare mounted in a row. A light guidecovering the LED modulesis provided on the substrate. The light guideis held in close contact with each of the LED modules. With this arrangement, a proper amount of light is obtained with the use of a smaller number of LED modulesor with less power consumption.

LED lamp

A lighting device includes a substrate and a planar light source portion including a plurality of LED chips arrayed on the substrate. The planar light source portion faces an illumination space (space to be illuminated) by a predetermined opening area. The plurality of LED chips are arrayed on the substrate such that the mounting density with respect to the opening area is not less than 3/cm, and accordingly, a planar light source is formed.

A LED (Light Emitting Diode) lamp capable of effectively dissipating heat to the outside and distinguishing borders of bright portions and dark portions in a tube cap is provided. The LED lamp includes: a tube; a support member, including a heat dissipation component extending in an axial direction of the tube, and accommodated in the tube; a plurality of LED chips, accommodated in the tube and supported by the support member; and an adhesive layer, disposed between the heat dissipation component and the tube, and used for adhering the heat dissipation component and the tube. The LED lamp further includes a tube cap formed by a first semi-cylinder portion and a second semi-cylinder portion. A light passing space allowing light emitted from each LED chip to pass through is formed in the tube. The first semi-cylinder portion and the second semi-cylinder portion together surround the tube.

Growing community of inventors

Kyoto, Japan

Toshio Watanabe