Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium
Reexamination Certificate
2007-01-30
2007-01-30
Santiago, Mariceli (Department: 2879)
Electric lamp and discharge devices
With luminescent solid or liquid material
With gaseous discharge medium
C313S501000, C313S512000, C257S089000, C257SE33061, C257S098000, C252S30140S, C252S30140P, C252S30140H, C252S30140R
Reexamination Certificate
active
10491411
ABSTRACT:
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.
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Iwama Katsuaki
Kitahara Hiromi
Maeda Toshihide
Oshio Shozo
Matsushita Electric - Industrial Co., Ltd.
McDermott Will & Emery LLP
Rielley Elizabeth
Santiago Mariceli
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