Toshiba Lighting & Technology Corporation

Harison Toshiba Lighting Corporation

Yuji Wagatsuma

Takao Mizukami

Ryuji Tsuchiya

Naoki Tsutsui

Yoshinori Sato

Junichi Kinoshita

Tsuneo Nakayama

Kiyoshi Matsunaga

Naoki Matsuoka

Norihiko Ochi

A package for light emitting element including a package main bodyhaving a bottom faceon which a light emitting elementis arranged, and a concave portionwhich is formed in an inverted truncated cone shape by an inner wall faceintersecting with the bottom facewith a predetermined angle, and a translucent memberfilled in the concave portionof the package main body, the angle between the inner wall facecomposing the concave portionand the bottom faceis selected within &#xb1;15&#xb0; of the incident critical angle in which a direct light radiated from the light emitting elementundergoes total reflection at the interface between the translucent memberand air.

Package for light emitting element and manufacturing method thereof

A lighting device controls power to a discharge lamp according to the temperature detected by a lamp sensor, which detects temperature around the discharge lamp. The discharge lamp has an arc tube and an outer bulb between which an airtight space is defined. Therefore, the lamp can be actuated without reduction in luminosity even at low temperatures. Also, the lamp luminosity rises quickly.

Lighting device and display equipment

Growing community of inventors

Kanagawa-ken, Japan

Yuji Wagatsuma