LED Unit of Compact, High Power and Long Lifetime

• SUGIMOTO Masaru

  Matsushita Electric Works, Ltd.

• URANO Yoji

  Matsushita Electric Works, Ltd.

• KUZUHARA Ikko

  Matsushita Electric Works, Ltd.

• HAYASHI Takao

  Matsushita Electric Works, Ltd.

• MASUI Mikiko

  Matsushita Electric Works, Ltd.

• TANAKA Ken-ichi

  Matsushita Electric Works, Ltd.

Abstract

The encapsulation optical component shaped in an elliptical dome over the LED chip and the mixing of multiple types of fluorescent materials in an appropriate ratio improves colour rendering properties and distribution controllability while suppressing colour variation. The developed technologies can be applied to produce an LED luminaire that resembles a compact ceiling-light but can be used as a downlight with the light intensity equivalent to a 60W incandescent lamp and light quality comparable to a fluorescent lamp.

Journal

• Journal of Light & Visual Environment

  Journal of Light & Visual Environment 32 (2), 196-201, 2008

  The Illuminating Engineering Institute of Japan

Keywords

• LED
• luminaire
• CRI
• life
• white
• GaN
• InGaN
• high power
• compact
• unit

Details

• CRID: 1390282679593820672
• NII Article ID: 110006663912
• NII Article ID: 130004439665
• NII Book ID: AA00258424
• DOI: 10.2150/jlve.32.196
• ISSN: 13498398
• ISSN: 03878805
• Web Site: http://www.jstage.jst.go.jp/article/jlve/32/2/32_2_196/_pdf
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10486425
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • NDL-Digital
  • CiNii Articles
• Abstract License Flag: Disallowed