Television – Video display – Projection device
Reexamination Certificate
2002-04-01
2004-09-07
Kostak, Victor R. (Department: 2611)
Television
Video display
Projection device
C348S750000, C353S030000, C427S066000
Reexamination Certificate
active
06788354
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to image displays.
BACKGROUND OF THE INVENTION
Image displays include emissive displays, such as phosphor displays used in cathode tube-based television and computer monitors, and transmissive displays, such as projection displays used for large screen TVs. An emissive display works by emitting visible light from pixels that are excited by, e.g., electron beams or fluorescent lamps. In the case of conventional electron beam-based displays, the electron beam is scanned across the pixels as appropriate to excite the pixels to produce a demanded image. In the case of fluorescent lamp-based displays such as plasma displays, ultraviolet light from a gas discharge is directed to appropriate pixels that are physically shielded from each other, with the pixel illumination pattern necessary to produce the demanded image not being established by scanning the UV light, which is simply a discharge from the lamp, but by appropriately blocking the UV light to impinge only on the desired pixels. Both of the above-mentioned emissive displays require the presence of a vacuum within the device, which can complicate manufacturing and raise costs.
Because the weight of some emissive displays becomes infeasibly large in the case of large screen displays, e.g., displays having sizes of 40″-60″ or more, the above-mentioned transmissive displays have been provided, an example of which is the projection display. A projection display works by projecting pixellated light from a relatively small source onto a relatively large projector, which “transmits” the light toward the viewers.
As recognized herein, while effective, large screen projection-type displays suffer from the drawback of relatively low image quality, compared to the image quality afforded by a smaller emissive display. On the other hand, current emissive display technology, as noted above, cannot easily be used to establish large screen displays owing to weight and other practical restrictions. Nevertheless, the present invention recognizes that it would be desirable to provide a large screen emissive display to overcome the image quality drawback of many large transmissive displays.
SUMMARY OF THE INVENTION
A method for making a color separator configured for an image display apparatus includes providing a substrate, and establishing phosphor-based red, green, and blue subpixels on the substrate. The subpixels are covered with at least one refraction layer. A color selection mask layer is printed onto the refraction layer to shield the blue and green subpixels from a first beam, shield the red and green subpixels from a second beam, and shield the red and blue subpixels from a third beam.
Preferably, the display is a large screen phosphor display, and the color selection mask is ink-jet printed onto the refraction layer. The color selection mask defines plural excitation light apertures defining variable pitches established based on the locations of the respective excitation light apertures relative to the display.
In another aspect, a method for producing a demanded image includes establishing a mask on a phosphor display. The mask has apertures defining pitches between adjacent apertures. At least one pitch is different from another pitch. The method includes receiving the demanded image, and directing light onto a display through the mask.
The details of the present invention, both as to its structure and operation, can best be understood in reference to the accompanying drawings, in which like reference numerals refer to like parts, and in which:
REFERENCES:
patent: 4794299 (1988-12-01), Chiodi et al.
patent: 4931689 (1990-06-01), Van Uden
patent: 5442482 (1995-08-01), Johnson et al.
patent: 5473396 (1995-12-01), Okajima et al.
patent: 5652666 (1997-07-01), Florence et al.
patent: 5774174 (1998-06-01), Hardie
patent: 6088102 (2000-07-01), Manhart
patent: 6157119 (2000-12-01), Hung et al.
patent: 6172797 (2001-01-01), Huibers
patent: 6211614 (2001-04-01), Katayama et al.
patent: 6313894 (2001-11-01), Sekine et al.
patent: 6370019 (2002-04-01), Matthies et al.
patent: 6407851 (2002-06-01), Islam et al.
patent: 6476848 (2002-11-01), Kowarz et al.
patent: 6480634 (2002-11-01), Corrigan
patent: 6498431 (2002-12-01), Katayama et al.
patent: 6552855 (2003-04-01), Kowarz et al.
patent: 6577429 (2003-06-01), Kurtz et al.
patent: 6661029 (2003-12-01), Duggal
patent: 2002/0033677 (2002-03-01), Okada
patent: 2002/0122260 (2002-09-01), Okazaki et al.
patent: 2003/0048390 (2003-03-01), Welch et al.
patent: 2003/0086179 (2003-05-01), Kowarz et al.
patent: 2003/0132699 (2003-07-01), Yamaguchi et al.
patent: 2003/0174255 (2003-09-01), Lee et al.
patent: 2003/0184209 (2003-10-01), Russ et al.
patent: 2003/0184531 (2003-10-01), Morikawa et al.
patent: 2003/0184842 (2003-10-01), Morikawa et al.
Russ Ben
Zustak Frederick J.
Kostak Victor R.
Rogitz John L.
Sony Corporation
LandOfFree
Method for making color separator for emissive display does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for making color separator for emissive display, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for making color separator for emissive display will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3239987