Color television receiver including display means comprising two uniformly distributed luminescent materials

Claim 1

A COLOR TELEVISION RECEIVER COMPRISING: (A) RECEIVER MEANS RESPONSIVE TO RECEIVED COLOR TELEVISION SIGNALS FOR PRODUCING AT LEAST TWO VIDEO SIGNALS REPRESENTING RESPECTIVE COLOR SEPARATION IMAGE COMPONENTS OF DIFFERENT DOMINANT WAVELENGTHS SCANNED IN SYNCHRONISM ACCORDING TO A PERIODIC PROGRAM; (B) A KINESCOPE COMPRISING A TARGET ASSEMBLY DEFINING A RASTER; (C) SAID ASSEMBLY INCLUDING A COVERING ON SAID RASTER WHICH COMPRISES TWO SUPERPOSED LAYERS OF MATERIAL, EACH OF WHICH EMITS CHROMATIC LIGHT OF DIFFERENT DOMINANT WAVELENGTHS WHEN ELECTRONS IMPINGE THEREON AND EXCIT THE SAME; (D) THE MATERIAL OF THE LAYER FIRST IMPINGED UPON BY ELECTRONS BEING UNIFORMLY DISTRIBUTED OVER SAID RASTER BUT COVERING ONLY A PORTION THEREOF SUCH THAT ABOUT 50% TO 70% OF THE ELECTRONS IMPINGING UPON THE LAST MENTIONED LAYER TRANSFER THERETO A SUBSTANTIAL AMOUNT OF THEIR ENERGY; (E) THE HUES OF THE CHROMATIC LIGHT EMITTED BY SAID TWO SUPERPOSED LAYER OF METERICAL BEING SUBSTANTIALLY COMPLEMENTARY SO THAT SUBSTANTIALLY ACHROMATIC LIGHT IS PRODUCED BY THE SIMULTANEOUS EXCITATION OF BOTH OF SAID LAYERS OVER A GIVEN ELEMENTAL AREA ON SAID RASTER IN A MANNER WHICH CAUSES EMISSION OF SUBSTANTIALLY THE SAME AMOUNT OF LIGHT FROM EACH LAYER; (F) MEANS TO PRODUCE A BEAM OF ELECTRONS FOCUSED ON SAID COVERING AND CAUSED TO SCAN THE RASTER IN ACCORDANCE AND IN SYNCHRONISM WITH SAID PERIODIC PROGRAM FOR EXCITING SAID LAYERS; (G) MEANS TO ACCELERATE ELECTRONS IN SAID BEAM DURING A FIRST PORTION OF SAID PERIODIC PROGRAM SUCH THAT ONLY THE LAYER EMITTING CHROMATIC LIGHT OF THE LONGER DOMINANT WAVELENGTH IS SUBSTANTIALLY EXICITED; (H) MEANS TO ACCELERATE ELECTRONS IN SAID BEAM DURING A SECOND PORTION OF SAID PERIODIC PROGRAM SUCH THAT BOTH OF SAID LAYERS ARE SIMULTANEOUSLY EXCITED IN THE SAME ELEMENTAL AREA TO EMIT SUBSTANTIALLY THE SAME AMOUNT OF LIGHT; (I) MEANS TO MODULATE SAID BEAM DURING SAID FIRST PORTION OF SAID PERIODIC PROGRAM WITH THE VEDEO SIGNAL REPRESENTING ONE COLOR-SEPARATION IMAGE COMPONENT OF RELATIVELY LONG DOMINANT WAVELENGTH FOR CAUSING SAID BEAM TO REPRODUCE ON SAID RASTER IN CHROMATIC LIGHT OF THE LONGER DOMINANT WAVELENGTH SAID ONE COLOR-SEPARATION IMAGE COMPONENT; AND (J) MEANS TO MODULATE SAID BEAM DURING SAID PORTION OF SAID PERIODIC PROGRAM WITH THE VIDEO SIGNAL REPRESENTING ANOTHER COLOR SEPARATION IMAGE COMPONENT OF RELATIVELY SHORT DOMINANT WAVELENGTH FOR CAUSING SAID BEAM TO REPRODUCE ON SAID RASTER IN SUBSTANTIALLY ACHROMATIC LIGHT SAID OTHER COLOR SEPARATION IMAGE COMPONENT.