| 摘要 |
<P>PROBLEM TO BE SOLVED: To prepare a stable high-quality nitride fluorescent sheet having excellent luminous efficiency and color rendering properties and high durability without toxicity. <P>SOLUTION: The nitride fluorescent sheet is provided with a phosphor converting the wavelength of at least a part of a first emission spectrum and having one or more second light emission spectra in a region different from the first emission spectrum. The phosphor is a nitride phosphor represented by L-M-N:R or L-M-O-N:R (wherein, L contains one or more kinds selected from the group consisting of Be, Mg, Ca, Sr, Ba and Zn; M contains one or more kinds selected from the group consisting of C, Si, Ge, Sn, Ti, Zr and Hf; N is nitrogen, O is oxygen; and R is a rare earth element) and arranged in a planar state. The nitride fluorescent sheet can be a light-transmitting sheet or a nitride fluorescent film composed of a multilayered film is used therefor. <P>COPYRIGHT: (C)2004,JPO |
