Color display tube

A display tube for reproducing color images on a screen in response to color input signal information, comprising:

• an electron gun structure for emitting an electron beam directed toward said screen, wherein the intensity of said beam is modulated in accordance with Z-axis image input information;
• deflection means for causing said electron beam to scan said screen in accordance with image synchronization input information provided in X and Y axes;
• said screen being provided with plural phosphor material areas each adapted to emit light of a selected color when scanned by said electron beam;
• a shadowmask interposed between said electron gun structure and said screen, said shadowmask having a multiplicity of openings through which at least a portion of said electron beam may pass to reach areas of phosphor material as an opening in said mask is substantially aligned with an area of phosphor material;
• and
• means for providing lateral relative positioning between said shadowmask and said screen to change the alignment between screen areas and said openings.

A display device for reproducing color images on a screen in response to color input signal information, comprising:

• a source means for emitting electrons;
• said screen being provided with plural phosphor material areas each adapted to emit light of a selected color in response to electron emission from said source means;
• control means interposed between said source means and said screen, said control means having a multiplicity of openings through which at least a portion of said electrons from said source may pass to reach areas of phosphor material as an opening in said control means is substantially aligned with an area of phosphor material;
• and
• means for providing lateral relative movement between said control means and said screen to change the alignment between screen areas and said openings.