Color visual display

Claim 2

Visual display including at least one source of coherent electromagnEtic radiation emitting at at least one wavelength, a screen provided with means for emitting at least two different visible wavelengths of light, means for displacing emission from a said coherent source so as to make its output incident upon different portions of the said screen, and means for altering the relative amounts of the said two wavelengths emitted from the said screen in given time intervals, characterized in that emission of at least one of the said wavelengths is produced by a phosphor portion of the said screen, in which radiation from the said laser is polarized, in which modulation means is provided for modulating such polarization, and in which the said modulated radiation is made incident on a selected means which transmits primarily only one polarized portion of the said radiation to a phosphor portion of said screen while reflecting at least a portion of the remainder of the modulated radiation.

Claim 3

System of claim 1 in which at least one of the said wavelengths emitted by the said screen is reflected emission from the said coherent light source.

Claim 4

A system of claim 1 in which the said screen includes a phosphor portion which consists essentially of an organic colorant.

Claim 5

System of claim 3 in which the said colorant contains at least one fluorescent organic component selected from the group consisting of coumarin, xanthene, acridine, Rhodamine naphthalimide, azine, thiazine, type compounds.

Claim 6

System of claim 4 in which the said component is selected from the group consisting of pyrelene, 7-diethylamino 4-methyl coumarin, Rhodamine B, Rhodamine 6G, acridine, 4-amino 1,8-naphthal p-xenylimide.

Claim 7

System of claim 1 in which the means for selecting is displacement sensitive and in which only selected portions of the said screen comprise a phosphor emitting at one of the said wavelengths.

Claim 8

System of claim 1 in which the said selection means is polarization sensitive.

Claim 9

System of claim 7 in which the said polarization is essentially plane polarization.

Claim 10

System of claim 8 in which the screen includes portions which are plane polarizing and in which some of the said plane-polarizing portions overlay at least some phosphor portions.

Claim 11

System of claim 9 in which the emission from said coherent light source is plane polarized prior to becoming incident upon the said screen.

Claim 12

System of claim 8 in which the said polarization is circular polarization.

Claim 13

System of claim 11 in which selection results from use of a screen surface portion consisting essentially of liquid crystals.

Claim 14

System of claim 12 in which the said liquid crystals are cholestoric.

Claim 15

System of claim 12 in which the emission from the said coherent light source is circularly polarized.

Claim 16

System of claim 1 in which the said coherent light source includes a cadmium-helium laser emitting at 4,416 A.

Claim 17

System of claim 1 includes at least one acousto-optic element.

Claim 18

System of claim 1 in which said phosphor consists essentially of at least one composition selected from the group consisting of M1 1/2R1/2M6 O4, M2 1 2xM1 xRxM6 O4, R2/3M6 O4, R3M3 5O12, RM3 O3, M1 RO2, M2 R1/2M5 1/2O3,RM5 O4, R2M4 O5, R2M4 2O7, RZ3, ROZ, R3OZ7, R2O3, R2O2Q, R2Q3, and substitutions of R or R plus M1 into M2 O or M2Q; in which M6 is W, Mo, S, Se, Te, M5 is Nb, Ta, V, P, As, Sb, M4 is Si, Ge, Ti, Zr, Hf, Sn, M3 is B, Al, Ga, Sc, In, Bi, M2 is Pb, Ba, Sr, Ca, Cd, M1 is Li, Na, K, Rb, Cs, Tl, Z is F, Cl, Br, I, and Q is S, Se, Te; in which R is Tb+Eu with or without Bi, La, Ce, Gd, Lu, Y, In, Sc; and in which from 5 to 99.9 ion percent of the R ions is Tb and from 0.1 to 50 ion percent of the R ions is Er.

Claim 19

System of claim 17 in which said third means consists essentially of M1 0.5 xR0.5 x/3M6 O4 in which M1 is Li and Na, M6 is W and Mo, and R contains Tb+Eu.

Claim 20

System of claim 18 in which the said third means consists essentially of Li0.5Tb0.5 xEuxWO4.

Claim 21

Visual display including at least one source of coherent electromagnetic radiation emitting at at least one wavelength, a screen provided with means for emitting at least two different visible wavelengths of light, means for displacing emission from a said coherent source so as to make its output incident upon different portions of the said screen, and means for altering the relative amounts of the said two wavelengths emitted from the said screen in given time intervals, characterized in that emission of at least one of the said wavelengths is produced by a phosphor portion of the said screen, in which the said coherent light source includes an argon-ion laser which emits at 4,880 A., in which the said laser additionally emits at a wavelength of about 5,145 A., in which the said screen is adapted for scattering at least a portion of the radiation produced by the said laser, in which the said screen includes phosphorescent portions for converting at least a portion of radiation at the said wavelength of about 4,880 A. to red light, in which the said portions form regularly spaced parallel bands, and in which the said 4,880 A. radiation from the said laser is polarized, in which the polarization is modulated by a polarization means, and in which the so modulated radiation is transmitted through a deflection means which is polarization independent.

Claim 22

Visual display including at least one source of coherent electromagnetic radiation emitting at at least one wavelength, a screen provided with means for emitting at least two different visible wavelengths of light, means for displacing emission from a said coherent source so as to make its output incident upon different portions of the said screen, and means for altering the relative amounts of the said two wavelengths emitted from the said screen in given time intervals, characterized in that emission of at least one of the said wavelengths is produced by a phosphor portion of the said screen, in which the said coherent light source includes an argon-ion laser which emits at 4,880 A., in which the said laser additionally emits at a wavelength of about 5,145 A., in which the said screen is adapted for scattering at least a portion of the radiation produced by the said laser, in which the said screen includes phosphorescent portions for converting at least a portion of radiation at the said wavelength of about 4,880 A. to red light, in which the said portions form regularly spaced parallel bands, and in which the said 4,880 A. radiation from the said laser is polarized, in which the polarization is modulated by a polarization means, and in which the so modulated radiation is transmitted through a deflection means which is polarization independent.

Claim 23

System of claim 20 in which the said modulating means is an electro-optic modulator.