H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/39, 350/62,
H04N 7/01 (2006.01) H04N 5/253 (2006.01) H04N 5/93 (2006.01)
Patent
CA 1220850
PHN 10700 16 13.4.1984 ABSTRACT: Television circuit for the reduction of flicker on a display. The television circuit is suitable for use with a television picture signal originating from a tele-cine converter (1) which operates at a cine film display rate of 24 frames per second and a 60 Hz field frequency. The picture signal then has cycles of alternately two and three field periods with the same picture information which, on display, results in flicker phenomena. To ac- complish reduced flicker on display of the picture signal on a display screen, the picture signal is applied di- rectly and via a delay device (5) producing a time delay of at least two or more whole field periods to a signal combining circuit (6) which is in the form of a matrix circuit and is followed by a change-over circuit (7). The matrix circuit (6) produces signal combinations in the output picture signal which on display result in flicker reduction. Fig. 1.
455583
N.v.philips'gloeilampenfabrieken
Van Steinburg C.e.
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