Patent ID: 6888301

Claim:
A gas is charge display apparatus including a plasma display panel utilizing at least one of neon and helium gases to generate a gas discharge for exciting a fluorescent material emitting red color, a fluorescent material emitting green color and a fluorescent material emitting blue color to display a color image on a display screen thereof, comprising: an optical filter covering the entire screen and disposed in front of the plasma display panel, selectively absorbing light having a wavelength equal to that of light emission of the gas and having characteristics in which first and second peak absorbencies exist in a visible light wavelength range, a wavelength of a first peak absorbency has a value within a range of 580 to 600 nanometers and corresponds to the wavelength of the light emission of the gas, a wavelength of a second peak absorbency has a value within the range of 500 to 550 nanometers and corresponds to a wavelength of the fluorescent material emitting a green color, a transmittance of the optical filter at the first peak absorbency is 50% or less, and an average transmittance in a green wavelength range is larger than a transmittance at a first peak absorbency and is smaller than an average transmittance in the blue wavelength range.