Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1983-05-31
1986-07-01
Chin, Tommy P.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
H04N 557, H04N 977
Patent
active
045983160
ABSTRACT:
Brightness control apparatus for a video signal processing system wherein the video signal is pre-conditioned to establish a prescribed reference level during image blanking intervals. The prescribed reference level is afterwards further modified by adding a black-going pulse component to the video signal during the blanking intervals. The magnitude of the added pulse component is adjusted in accordance with the setting of an adjustable brightness control to control the brightness of images displayed by an image display device included in the system. Controlled video signals are AC coupled to an intensity control electrode of the display device by a DC restoration circuit which responds to the magnitude of the added blanking interval pulse component, for establishing the DC bias of intensity control electrode and thereby image brightness.
REFERENCES:
patent: 3272914 (1966-09-01), Moles et al.
patent: 3499104 (1970-03-01), Austin
patent: 4091419 (1978-05-01), Rhee
patent: 4135200 (1979-01-01), Shanley, II
patent: 4204221 (1980-05-01), Shanley
patent: 4285008 (1981-08-01), Osawa et al.
"Funk-Technik", No. 15, 1967, pp. 538-540 (with translation).
Chin Tommy P.
Emanuel P. M.
Kurdyla R. H.
Rasmussen P. J.
RCA Corporation
LandOfFree
Brightness control network in a video signal processor with AC c does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Brightness control network in a video signal processor with AC c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Brightness control network in a video signal processor with AC c will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1084952