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AssigneeKoninklijke Philips Electronics N.V.
InventorsDaniel Den Engelsen, Ivo Maria Martinus Durlinger, Hideo Kikuchi, Masaharu Watanabe
Estimating the term…
A screen for a color display tube or display window has a structure of apertures in a black matrix and electro-luminescent material in the apertures. Steps in producing the screen include applying the black matrix and the electro-luminescent material, and exposing photosensitive material on the display window to light emitted by a light source and passed through a lens system and a shadow mask. The shadow mask is suspended from the display window and the lens system is positioned between the light source and the shadow mask. On the screen, the lens system realizes a microscopic light distribution of the light originating from the light source radiating towards the screen. The photosensitive material includes a bleaching dye functioning as a contrast enhancer in at least one of the process steps.
A method of producing a screen having a structure of apertures in a black matrix and electroluminescent material in said apertures, on a display window of a color display tube, comprising process steps of applying the black matrix and the electroluminescent material, in which process steps photosensitive material on the display window is exposed to light emitted by a light source and passed through a lens system and a shadow mask, which shadow mask is suspended from the display window and which lens system is positioned between the light source and the shadow mask, the lens system realizing, on the screen, a microscopic light distribution of the light originating from the light source radiating towards the screen,
A color display tube or display window, provided with a screen having a structure of apertures in a black matrix and electroluminescent material in said apertures, which screen is produced by a method comprising:
Dependencies are inferred from the claim text.