Display apparatus and method of making the same
First Claim
Patent Images
1. A display apparatus comprising:
- an EL apparatus, which is provided for emitting rays of UV image from its light emitting face, and which comprises;
a UV-emitting layer including a UV-emitting fluorescent material which is to be excited by electric field application,a dielectric layer provided on at least one face of said UV-emitting layer, anda pair of electrodes which is provided in a manner to oppose each other interposing said UV-emitting layer and said dielectric layer therebetween, at least one of said electrode being transparent or translucent,a projection lens system provided on paths of the rays of UV image for projecting a UV image of the light emitting face, anda fluorescent screen for emitting visible lights when lit up by the rays of UV image through the projection lens system.
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Abstract
A novel type projection TV has a large size fluorescent screen bearing three kinds of dots or stripes of fluorescent material which emits visible lights of red, green and blue at excitation by UV-rays, which are emitted from UV-emitting CRTs'"'"' for red, green and blue pixel of image, respectively; and a mask having UV-light passing apertures or a lens array is disposed on light paths of the UV-rays to improve color purity,
92 Citations
21 Claims
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1. A display apparatus comprising:
an EL apparatus, which is provided for emitting rays of UV image from its light emitting face, and which comprises; a UV-emitting layer including a UV-emitting fluorescent material which is to be excited by electric field application, a dielectric layer provided on at least one face of said UV-emitting layer, and a pair of electrodes which is provided in a manner to oppose each other interposing said UV-emitting layer and said dielectric layer therebetween, at least one of said electrode being transparent or translucent, a projection lens system provided on paths of the rays of UV image for projecting a UV image of the light emitting face, and a fluorescent screen for emitting visible lights when lit up by the rays of UV image through the projection lens system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10)
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9. A display apparatus comprising:
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a UV light source for emitting rays of UV image from its light emitting face, a projection lens system provided on paths of the rays of UV image for projecting a UV image of the light emitting face, a fluorescent screen for emitting visible lights when lit up by the rays of UV image through the projection lens system, and three UV light sources disposed substantially on a triangle which is substantially perpendicular to an optical axis of either one of the UV light sources, and a lens array comprising a number of lenses disposed in the same direction as that of said UV light source, said lens array provided between said projection lens system and said fluorescent screen.
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11. A display apparatus comprising:
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a UV light source for emitting rays of UV image from its light emitting face, a projection lens system provided on paths of the rays of UV image for projecting a UV image of the light emitting face, and a fluorescent screen for emitting visible lights when lit up by the rays of UV image through the projection lens system, wherein said UV light source is a CRT comprising a UV-emitting fluorescent material which is excited by electron beam bombardment, and wherein said UV-emitting fluorescent material is at least one member selected from the group consisting of diamond, silicon, carbide, III-V compound semiconductors, IIb-VI compound semiconductors, IIa-VI compound semiconductors, chalcopyrite compounds and manganese calcogenite compounds. - View Dependent Claims (12, 13, 14, 15, 16)
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17. Method for making fluorescent screen for display apparatus comprising:
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a UV light source which emits rays from a image emitted from its UV light emitting face, a projection lens system provided on a path of said UV light for projecting UV rays from image of said light emitting face, a fluorescent screen for emitting visible-light when lit up by UV rays through said projection lens system, and a mask, which is disposed on said path between said projection lens and said fluorescent screen and passes UV rays which are emitted from said image, the method comprising the steps of; disposing a pattern exposing light source at such a position that said UV light source is to be disposed for projecting said UV light image through said projection lens on a desired irradiating region on said fluorescent screen at a given position, disposing said mask at such predetermined position as to make a predetermined gap from said fluorescent screen, coating a negative photoresist film containing a visible-light-emitting fluorescent material on said fluorescent screen, disposing said fluorescent screen at said given position, exposing said negative photoresist film to said pattern-exposing light source, and developing said photoresist film after said exposing, thereby to obtain a desired pattern of said visible-light-emitting fluorescent material. - View Dependent Claims (18)
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19. Method for making fluorescent screen for display apparatus comprising:
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a UV light source which emits rays from a image emitted from its UV light emitting face, a projection lens system provided on a path of said UV light for projecting UV rays from image of said light emitting face, a fluorescent screen for emitting visible-light when lit up by UV rays through said projection lens system, and a lens array, which is disposed on said path between said projection lens and said fluorescent screen and deflects UV rays, the method comprising the steps of; disposing a pattern exposing light source at such a position that said UV light source is to be disposed for projecting said UV light image through said projection lens on a desired irradiating region on said fluorescent screen at a given position, disposing said lens array at such predetermined position as to make a predetermined gap from said fluorescent screen, coating a negative photoresist film containing a visible-light-emitting fluorescent material on said fluorescent screen, disposing said fluorescent screen at said given position, exposing said negative photoresist film to said pattern-exposing light source, and developing said photoresist film after said exposing, thereby to obtain a desired pattern of said visible-light-emitting fluorescent material. - View Dependent Claims (20)
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21. A display apparatus comprising:
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a UV light source for emitting rays of UV image from its light emitting face, a projection lens system provided on paths of the rays of UV image for projecting a UV image of the light emitting face, a fluorescent screen for emitting visible lights when lit up by the rays of UV image through the projection lens system, and a UV cut filter or UV reflection mirror at a position opposite to said projection lens system with respect to the fluorescent layer of said fluorescent screen.
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Specification