Space-saving cathode ray tube employing a non-self-converging deflection yoke

A display comprising:

• a tube envelope having a faceplate and a screen electrode on the faceplate biased at a screen potential;
• a source within said tube envelope of plural beams of electrons directed toward said faceplate;
• a non-self-converging deflection yoke proximate said source of plural beams of electrons for magnetically deflecting the plural beams of electrons;
• wherein said source of plural beams of electrons and said non-self converging deflection yoke are configured to substantially converge the plural beams of electrons when the deflected plural beams of electrons are at or near two opposing edges of said faceplate, rather than at or near the center of said faceplate;
• phosphorescent material disposed on said faceplate for producing light in response to the plural beams of electrons impinging thereon;
• a first electrode within said tube envelope, said first electrode defining an aperture through which the deflected plural beams of electrons pass, wherein said first electrode is intermediate said deflection yoke and said faceplate and is biased at a first potential one of greater than and less than the screen potential;
• and
• a source of potential providing the first and screen potentials.

A display comprising:

• a tube envelope having a faceplate and a screen electrode on the faceplate configured to be biased at a screen potential;
• a source within said tube envelope of plural beams of electrons directed toward said faceplate;
• a non-self-converging deflection yoke proximate said source of plural beams of electrons for magnetically deflecting the plural beams of electrons, wherein said non-self converging deflection yoke substantially converges the plural beams of electrons near two opposing edges of said faceplate;
• phosphorescent material disposed on said faceplate for producing light in response to the plural beams of electrons impinging thereon;
• and
• a processor coupled to said source of a beam of electrons for providing image information for controlling the plural beams of electrons, said processor changing image information from a first raster corresponding to position of an image to a second raster corresponding to position of the plural beams of electrons on said faceplate when deflected by said non-self-converging deflection yoke.

A display comprising:

• a tube envelope having a faceplate and a screen electrode on the faceplate configured to be biased at a screen potential;
• a source within said tube envelope of plural beams of electrons directed toward said faceplate;
• a non-self-converging deflection yoke proximate said source of plural beams of electrons for magnetically deflecting the plural beams of electrons, wherein said non-self converging deflection yoke substantially converges the plural beams ofelectrons near two opposing edges of said faceplate;
• phosphorescent material disposed on said faceplate for producing light in response to the plural beams of electrons impinging thereon;
• and
• a processor coupled to said source of a beam of electrons for providing image information for controlling the plural beams of electrons, said processor changing image information from a first raster corresponding to position of an image to a second raster corresponding to position of the plural beams of electrons on said faceplate when deflected by said non-self-converging deflection yoke,
• wherein said processor is responsive to pixel values of the image from one line of the first raster to provide pixel values of the image for one line of the second raster,
• wherein said processor comprises a first memory for storing the pixel values of the image from one line of the first raster, and a filter for selectively combining at least a portion of the stored pixel values to provide the pixel values of the image for the one line of the second raster, and
• wherein said first memory comprises a shift register for storing the pixel values from the one line of the first raster, and wherein said filter comprises a scaler coupled to said shift register for scaling at least a selected portion of the stored pixel values, and a combiner coupled to said scaler to provide the pixel values for the one line of the second raster.

A display comprising:

• a tube envelope having a faceplate and a screen electrode on the faceplate configured to be biased at a screen potential;
• a source within said tube envelope of plural beams of electrons directed toward said faceplate;
• a non-self-converging deflection yoke proximate said source of plural beams of electrons for magnetically deflecting the plural beams of electrons, wherein said non-self converging deflection yoke substantially converges the plural beams of electrons near two opposing edges of said faceplate;
• phosphorescent material disposed on said faceplate for producing light in response to the plural beams of electrons impinging thereon;
• and
• a processor coupled to said source of a beam of electrons for providing image information for controlling the plural beams of electrons, said processor changing image information from a first raster corresponding to position of an image to a second raster corresponding to position of the plural beams of electrons on said faceplate when deflected by said non-self-converging deflection yoke,
• wherein said processor is responsive to pixel values of the image from plural adjacent lines of the first raster to provide pixel values of the image for one line of the second raster,
• wherein said processor comprises a first memory for storing the pixel values of the image from plural adjacent lines of the first raster, and a filter for selectively combining at least a portion of the stored pixel values to provide the pixel values of the image for the one line of the second raster, and
• wherein said first memory comprises a shift register for storing the pixel values from the plural adjacent lines of the first raster, and wherein said filter comprises a scaler coupled to said shift register for scaling at least a selected portion of the stored pixel values, and a combiner coupled to said scaler to provide the pixel values for the one line of the second raster.

A processor comprising:

• a memory for storing pixel values of an image from a given line of a first raster,
• a filter coupled to the memory for selectively combining at least a portion of the stored pixel values to provide pixel values of the image for a given line of a second raster, wherein positions of the pixels of the given line of the first raster are not linearly related to positions of the pixels of the given line of the second raster,
• a second memory for storing the pixel values of the image from the given line of the second raster, and
• a second filter for selectively combining at least a portion of the pixel values stored in said second memory to provide modified pixel values of the image for the given line of the second raster.

A cathode ray tube comprising:

• a tube envelope having a faceplate and a screen electrode on the faceplate configured to be biased at a screen potential;
• a source of plural beams of electrons directed toward said faceplate, wherein said source is configured for magnetic deflection of said plural beams of electrons;
• a non-self-converging deflection yoke proximate said source of plural beams of electrons for magnetically deflecting the plural beams of electrons;
• wherein said source of plural beams of electrons and said non-self converging deflection yoke are configured to substantially converge the plural beams of electrons when the deflected plural beams of electrons are at or near two opposing edges of said faceplate, rather than at or near the center of said faceplate;
• a shadow mask proximate said faceplate having a plurality of apertures therethrough, wherein said shadow mask is configured to be biased at the screen potential, and
• phosphorescent material disposed on said faceplate for producing light in response to the beam of electrons impinging thereon,
• wherein said phosphorescent material includes a pattern of different phosphorescent materials on said faceplate that emit different color light in response to the deflected plural beams of electrons impinging thereon through the apertures of said shadow mask.