Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1989-01-26
1992-02-25
Weldon, Ulysses
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340701, 358 72, 358 73, G09G 128
Patent
active
050917188
ABSTRACT:
A multiple color imaging device such as a beam index CRT (FIG. 3a/b), with red, green and blue phosphor stripes arranged in triplets each defining one color image pixel in the line scan direction having at least the red and green phosphor stripes coated with an electrically insulating barrier layer 38 on which is formed a thin layer 39 of blue emitting phosphor. In color display mode the beam energy is sufficient to penetrate the barrier layer and excite the principal stripe phosphor to give the desired color emission but also excites the blue phosphor, blue emissions being perceived at lower luminance than the red and not detrimental to perceived color purity. In monochrome mode the beam energy is reduced to excite only the blue phosphor. As each stripe is able to emit blue when excited the image resolution for monochrome is increased from color triplet dimensions to individual stripe dimensions or better. The low level of blue emissions is suitable, and preferred, for night viewing of FLIR images, particularly with night vision goggles. Individual phosphor grains may be given a skin of the monochrome phosphor (FIG. 4) or it may be mixed with the principal phosphor without a barrier but with a red/green filter in front of the screen for monochrome operation (FIG. 2).
REFERENCES:
patent: 3517243 (1970-06-01), Jones
patent: 3622826 (1971-11-01), Royce
patent: 3857037 (1974-12-01), Tomii et al.
patent: 4155030 (1979-05-01), Chang
patent: 4170772 (1979-10-01), Bly
patent: 4582396 (1986-04-01), Bos et al.
patent: 4612483 (1986-09-01), Washington
patent: 4716403 (1987-12-01), Morozumi
Fatahi-yar M.
Weldon Ulysses
LandOfFree
Color-monochrome visual display device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Color-monochrome visual display device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color-monochrome visual display device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1895441