Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1979-03-21
1980-12-02
Richardson, Robert L.
Facsimile and static presentation processing
Facsimile
Recording apparatus
H04N 534
Patent
active
042374910
ABSTRACT:
In a television camera having an electron scanning beam stabilizer circuit, a circuit for improved handling of highlights comprises means for forming an electrical signal corresponding to a pickup tube image highlight, limiting the magnitude of said signal to a predetermined level and utilizing that signal to form a highlight handling signal which causes the increase in beam scanning current necessary to discharge said highlight. In a color camera, the output from one pickup tube can be used to derive the signals necessary to control all three tubes simultaneously. A modified beam stabilizer circuit comprises means for allowing the beam current to increase without reduction by the beam stabilizer in order to discharge the highlight. A complementary signal derived from the highlight handling signal is applied to the modified beam stabilizer simultaneously with the highlight handling signal in order to neutralize the beam stabilizer.
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Hacke Joseph F.
Olson Charles L.
Rasmussen Paul J.
RCA Corporation
Richardson Robert L.
Troike Robert L.
Whitacre Eugene M.
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