PHOSPHOR DISPLAY SCREEN AND FILTER INCLUDING PLATINUM AND MANGANESE CHLORIDE DERIVATIVES OF TETRAPHENYLPORPHIN
First Claim
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2. A display apparatus as defined by claim 1 wherein said polymeric matrix is an acrylic ester polymer.
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Abstract
A high-contrast display apparatus adapted for viewing in an environment of ambient light. A display screen is provided for producing an image consisting of a narrow band of wavelengths in the green region of the spectrum. Overlaying the display screen is a filter which consists of a layer of didymium glass coated with a layer of acrylic ester polymer. The polymer contains metal derivatives of tetraphenylporphin. The filter substantially absorbs the visible wavelengths incident upon it which are outside the spectral band emitted by the display screen.
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Citations
9 Claims
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2. A display apparatus as defined by claim 1 wherein said polymeric matrix is an acrylic ester polymer.
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3. A display apparatus as defined by claim 2 wherein said phosphor display screen comprises a terbium-activated phosphor.
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4. A display apparatus as defined by claim 3 wherein said terbium-activated phosphor is LaOCl:
- Tb the layer of polymeric matrix further contains a blue dye.
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5. A high-contrast display apparatus adapted for viewing in an environment of ambient light comprising:
- a. a cathode-ray display tube which includes a transparent faceplate having a phosphor emissive of a narrow band of wavelengths in the green region of the spectrum affixed to the inner surface thereof; and
b. an optical filter overlying said faceplate, said filter comprising a layer of didymium glass having coated thereon a layer of acrylic ester polymer which contains PtTPP, MnClTPP and a blue dye.
- a. a cathode-ray display tube which includes a transparent faceplate having a phosphor emissive of a narrow band of wavelengths in the green region of the spectrum affixed to the inner surface thereof; and
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6. A display apparatus as defined by claim 6 additionally comprising a layer of ultraviolet screening material overlaying said polymer layer.
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7. A display apparatus as defined by claim 6 additionally comprising another layer of ultraviolet screening material disposed between said glass layer and said polymer layer.
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8. A display apparatus as defined by claim 7 wherein said phosphor is a terbium-activated phosphor.
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9. A display apparatus as defined by claim 8 wherein said phosphor is LaOCl:
- Tb.
Specification