Shading correction signal generating device for a

专利名称：Shading correction signal generating device

for a television camera apparatus

发明人：Junichi Yamanaka申请号：US07/029953申请日：19870325公开号：US04731652A公开日：19880315

摘要：A shading correction wave generating unit generates a predetermined shadingcorrection waveform signal including AC signal components on the basis of a scanningdrive signal with at least one of horizontal or vertical scanning frequencies for a TVscreen. An area- designating signal generating unit generates an area-designating signalto designate a specific area on the TV screen on the basis of said scanning drive signal. Apotential clamping unit receives the predetermined shading correction waveform signalincluding AC signal components and the area-designating signal, and clamps thepredetermined shading correction waveform including AC components to a specificpotential in the specific area designated by the area-designating signal. An output unitproduces a shading correction signal which is the predetermined shading correctionwaveform signal including AC components as clamped to the specific potential in thespecific area by the potential clamping unit.

申请人：KABUSHIKI KAISHA TOSHIBA

代理机构：Oblon, Fisher, Spivak, McClelland & Maier

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