Full-resolution beam-index multi-color displays

A multi-color display system comprising:

• first means for generating a first viewable image representative of first information-bearing signals to be displayed;
• second means for generating a second optical image representative of second information-bearing signals to be displayed;
• a display screen;
• means for superposing said first viewable image and said second optical image on said display screen;
• wherein said display screen comprises converting means for changing said second optical image into a visible image which lies in a region of the spectrum different from that of said first image.

A multi-color display system comprising:

• means for receiving input signals representative of green, red, and blue information to be displayed;
• first means for generating a first visible image representative of the green information;
• second means for generating a second optical image representative of both the red and blue information;
• a display screen;
• means for superposing said first visible image and said second optical image on said display screen;
• and wherein said display screen comprises converting means for changing said second optical image into red and blue images corresponding to said red and blue input signals.

A high-resolution full-color display system comprising first means for generating a relatively high-resolution image;

• second means for generating a pattern of optical radiation representative of two different visible colors intended to be added to said high-resolution image;
• a display screen for combining said high-resolution image and said pattern of optical radiation, said display screen having converter means for changing said optical radiation into the two different visible colors to be added to said image;
• beam-index means in said display screen;
• and means responsive to said beam-index means for adjusting the registration of said two different colors with respect to the high-resolution image.

The method of achieving registration between two images displayed on a common screen comprising the steps of:

• 1. generating a first scannable beam of energy adapted to generate a first image,
• 2. scanning said beam across a target screen to form at least one scan line,
• 3. measuring the time it takes said beam to scan a predetermined section of said scan line,
• 4. comparing the thus-measured time to a reference,
• 5. and adjusting the rate of scan of said beam as a consequence of said comparison, thereby to achieve a predesignated scanning rate,
• 6. generating a second scannable beam of energy adapted to generate a second image,
• 7. scanning said second beam across the same target screen to form at least one other scan line,
• 8. measuring the time it takes said second beam to scan a predetermined section of said other scan line,
• 9. comparing said last-mentioned time to a reference, and
• 10. adjusting the rate of scan of said second beam, independent of the rate of scan of the scannable beam of energy, as a consequence of said last-mentioned comparison thereby to achieve a predesignated scanning rate for the second beam,
• 11. whereby registration is effected between the first and second images.