Abstract The combination of a color television receiver and a display system for presenting slide transparencies, movies or other image mediums upon the color cathode ray tube of the television receiver. The slide or other medium is scanned by a flying spot cathode ray tube which, in conjunction with dichroic mirrors and suitable filters separates the information derived from the scan of the medium into its representative color components, translates the representative color components into processed electrical signals and couples the processed signals directly to appropriate electrodes of the color cathode ray tube. The flying spot cathode ray tube is provided with a fixed focus and has a screen comprised of an admixture of Y3A15012:Ce and Ca2A12SiO7:Ce phosphors in approximately the ratio of 3 to 1 by weight. Also disclosed as an alternate for Ca2A12SiO7:Ce is ZnS: Ag:Ni.
The invention of claim 1 wherein said phosphor system comprises a substantially monolayer screen of phosphor particles.
Claim 2
Dependent Claim
20 words
The invention of claim 2 wherein said phosphors have an average particle size between 2.5 and 6 microns in diameter.
Claim 3
Dependent Claim
21 words
The invention of claim 3 wherein said facepLate has a spectral energy transmission rate of between 85 percent and 95 percent.
Claim 4
Dependent Claim
31 words
The invention of claim 1 wherein said phosphor system comprises a substantially homogeneous admixture of 65 percent to 85 percent of a first phosphor and the remainder of a second phosphor.
Claim 5
Dependent Claim
29 words
The invention of claim 5 wherein said first phosphor provides said areas of spectral energy encompassing the wavelengths of 5, 100 to 5,500 A and 6,100 to 6,500 A.
Claim 6
Dependent Claim
11 words
The invention of claim 6 wherein said first phosphor is Y3A15012:Ce.
Claim 7
Dependent Claim
19 words
The invention of claim 7 wherein said second phosphor is chosen from the group consisting of Ca2A12SiO7:Ce and ZnS:Aq:Ni.