| 摘要 |
PROBLEM TO BE SOLVED: To selectively cut the light of wavelength which decreases the color purity and to correct the color balance by forming a light absorbing layer having the absorption max. in a specified wavelength region, having a specified range of transmittance at the wavelength of the absorption max. and having specified or higher transmittance at a specified wavelength. SOLUTION: The filter layer has light absorbing layer having the absorption max. in a 560 to 620 nm wavelength region (between green and red). The transmittance at the wavelength of the absorption max. in the 560 to 620 nm wavelength range is 0.01 to 80%, and preferably 1 to 60%. The absorption max. in the 560 to 620 nm wavelength region is determined so as to selectively cut the subband which decreases the color purity of a red phosphor. In a plasma display panel, unnecessary light around 585 nm emitted by the excitation of neon gas is also cut. The light absorbing layer has >80% transmittance in 400 to 460 nm and 620 to 700 nm wavelength regions.
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