Title: Light emitting element and light emitting device using this
Application Number: 02819344 Application Date: 2002.09.27
Publication Number: 1561549 Publication Date: 2005.01.05
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C01B17/00,C01B25/45,C01B33/20,C01G45/00,H01L33/00
Applicant(s) Name: Matsushita Electric Ind Co., Ltd. Address:
Inventor(s) Name: Oshio Shozo, Iwama Katsuaki, Kitahara Hiromi
Attorney & Agent: wang huimin
Abstract:
     The present invention relates to a light emitting element and light emitting device using this. The semiconductor light emitting device is composed of a combination of a near ultraviolet LED and a phosphor layer including a plurality of phosphors for absorbing near ultraviolet emitted by the near ultraviolet LED and for emitting fluorescence having an emission peak in a visible wavelength region, and the phosphor layer includes four kinds of phosphors, that is, a blue-based phosphor, a green-based phosphor, a red-based phosphor and a yellow-based phosphor. Thus, lowering of luminous flux derived from red-based light with low luminosity is compensated by yellow-based light with comparatively high luminosity, and the resultant white-based light can be well color balanced, and hence, a semiconductor light emitting device emitting white-based light with high luminous flux and a large Ra can be obtained.
Time: 8