Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1986-01-14
1988-05-24
Groody, James J.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 10, 358 56, 358 64, H04N 973, H04N 912, H04N 916, H04N 1702
Patent
active
047469706
ABSTRACT:
A dynamic white uniformity correcting apparatus for a three-color display for displaying a color picture in response to three primary color signals and includes a cathode ray tube which has means for emitting a plurality of electron beams and a display screen divided into a plurality of incremental areas and the display also includes deflection means for scanning the plurality of electron beams across the display screen to produce the color picture in response to three primary color signals and wherein a correction signal generating means generates at least two correction signals for each incremental area of the display screen and the correction signal generating means includes a correction signal storage means for storing the correction signals. At least two amplitude modulators are provided for adjusting the level of different ones of the three primary color signals as a function of the correction signals and means for reading out the correction signals from the correction signal storage means as the plurality of electron beams are scanned across the incremental areas of the display screen so as to supply read out correction signals to the amplitude modulators to adjust the levels of the primary color signals to correct the white uniformity of the color picture.
REFERENCES:
patent: 4122485 (1978-10-01), Sonntag et al.
patent: 4137548 (1979-01-01), Kelly et al.
patent: 4631576 (1986-12-01), St. John
Kinameri, Kanji, et al., "White Uniformity Measurements on Color TV Picture Tubes", Applied Optics, 1 Jan. 1979, vol. 18, No. 1, pp. 135-140.
Hagiwara, Hiroshi, et al., "45-inch Projection Receivers", Toshiba Review, No. 132 (Mar.-Apr. 1981), pp. 37-43.
Ashiya Ryosuke
Hosokawa Hiromu
Momoi Koichi
Groody James J.
Sony Corporation
Svihla Randall S.
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