White balance device

Abstract

Abstract PURPOSE:To prevent the malfunction of the titled device by providing plural color signal integrating means and a gain control means and supplying the false signal of a prescribed value to the integrating means in a time interval in which one signal level, at least, out of the plural color signals deviates from a value in a prescribed range. CONSTITUTION:The input terminal of an input switching circuit 14 is connected to a line 2 of an integrating input adjusting circuit 15 and analog switches 8, 9 and 10 are switched when the level of a G signal is in a range and when it deviates from the range. When the level of the G signal deviates from the range of the dynamic range of an image pick-up element, these switches are connected to an input contact terminal(b). Then, in place of transmitted R, G and B signals, false signals PR, PG and PB set by false signal setting means 11, 12 and 13 are inputted to integrating circuits 16, 17 and 18 and integrated respectively over a prescribed time interval with the integrating circuit and suitable control is executed.

Inventors

• 👤 Hideaki Yoshida

Bibliographic Details