| CPC B32B 27/08 (2013.01) [B32B 37/10 (2013.01); B32B 38/0036 (2013.01); C09K 11/025 (2013.01); C09K 11/64 (2013.01); B32B 2038/0076 (2013.01); B32B 2307/422 (2013.01); B32B 2307/7376 (2023.05); B32B 2309/025 (2013.01); G03B 21/204 (2013.01)] | 7 Claims |
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1. Phosphor particles for producing a wavelength conversion member of a projector, the phosphor particles comprising:
CASN, wherein CASN is a phosphor in which a main crystal phase has a same crystal structure as that of CaAlSiN3 and a general formula represented by MAlSiN3:Eu in which M is one or more elements selected from Sr, Mg, Ca, and Ba; and/or
SCASN, wherein SCASN is an Sr-containing phosphor in which a main crystal phase has a same crystal structure as that of CaAlSiN3 and a general formula represented by (Sr, Ca) AlSiN3:Eu,
wherein a cured sheet produced by the following sheet producing procedure:
(1) 40 parts by mass of the phosphor particle and 60 parts by mass of a silicone resin OE-6630 manufactured by Dow Corning Toray Co., Ltd. are subjected to a stirring treatment and a defoaming treatment using a rotation and revolution mixer to obtain a uniform mixture,
(2) the mixture obtained in the section (1) is added dropwise to a transparent first fluororesin film, a transparent second fluororesin film is further laminated on the dropped material to obtain a sheet-like material, and this sheet-like material is molded into an uncured sheet using a roller having a gap in which 50 μm is added to a total thickness of the first fluororesin film and the second fluororesin film,
(3) the uncured sheet obtained in the section (2) is heated under conditions of 150° C. and 60 minutes, and the first fluororesin film and the second fluororesin film are peeled off to obtain a cured sheet having a film thickness of 50±5 μm,
satisfies the following optical characteristics:
when an intensity at a peak wavelength of blue light emitted from a blue LED having a peak wavelength in a range of 450 nm to 460 nm is defined as Ii [W/nm], and in a case where the blue light is irradiated on one surface side of the cured sheet, an intensity of light emitted from the other surface side of the cured sheet at a peak wavelength in the range of 450 nm to 460 nm is defined as It [W/nm], and an intensity of the light emitted from the other surface side of the cured sheet at a peak wavelength in a range of 600 nm to 650 nm is defined as Ip [W/nm], It/Ii is equal to or less than 0.2 and Ip/Ii is equal to or more than 0.05.
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