Plasma display panel with photoreflection/absorption
AssigneeNEC Corporation
InventorEishi Mizobata
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Abstract
According to this invention, there is provided a plasma display panel without reduction of luminance and with good contrast. The plasma display panel with high luminance and good contrast is provided by forming a photoreflection or photoabsorption layer for minimizing reflection of external light on the rear side of a fluorescence layer to directly radiate light emitted to the viewing side from the fluorescence layer as display light, and by reducing a reflectance on the fluorescence layer to below 25% in terms of reflection of external light which may cause contrast reduction.
Claims4
A plasma display panel comprising a plurality of cells having a fluorescent material between two glass substrates, viewing-side and rear substrates, in which the fluorescent material is excited by UV energy to emit visible light, characterized in that the visible-light reflectance of the fluorescence layer is below 10% and a photoreflection layer which effectively reflects only light with a specific emission wavelength of the fluorescent material of each cell and absorbs the remaining light, is formed between a barrier rib separating cells from each other and a cell bottom surface, namely the surface of the rear substrate and the fluorescence layer formed on the inner surface of the cell.
An AC type of plasma display panel comprising a plurality of cells having a fluorescent material between two glass substrates, viewing-side and rear substrates, in which the fluorescent material is exited by UV energy to emit visible light, characterized in that the visible-light reflectance of the fluorescence layer is below 10% and a barrier rib separating cells from each other and a dielectric layer on a cell bottom surface, namely the surface of the rear substrate is a photoreflection layer which can effectively reflect only light with a specific emission wavelength of the fluorescent material and absorb the remaining light.
A plasma display panel comprising a plurality of cells having a fluorescent material between two glass substrates, viewing-side and rear substrates, in which the fluorescent material is excited by UV energy to emit visible light, characterized in that a gray photoreflection layer which does not have a wavelength distribution, is formed between a barrier rib separating cells from each other and a cell bottom surface, namely the surface of the rear substrate and the fluorescence layer formed on the inner surface of the cell, wherein the visible-light reflectance of the fluorescence layer is below 10%.
An AC type of plasma display panel comprising a plurality of cells having a fluorescent material between two glass substrates, viewing-side and rear substrates, in which the fluorescent material is excited by UV energy to emit visible light, characterized in that a barrier rib separating cells from each other and a dielectric layer on a cell bottom surface, namely the surface of the rear substrate is a gray photoreflection layer which does not have a wavelength distribution and can absorb light, wherein the visible-light reflectance of the fluorescence layer is below 10%.
Dependencies are inferred from the claim text.