Color image pickup device having color temperature converting filters
AssigneeCanon Kabushiki Kaisha
InventorYuichiro Hattori
Life of this patent
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Abstract
A filter member which can alternatively arrange a proper one of a plurality of kinds of color temperature converting filters onto an optical axis of an image pickup device is provided and the driver of the filter member is controlled by using a plurality of color signals which are generated from the image pickup device, so that a proper color temperature converting filter can always be used. An adjusting mechanism for adjusting relative gains of a plurality of color signals which are generated from the image pickup device is further provided. By also adjusting the adjusting mechanism by using a plurality of color signals which are generated from the image pickup device, an automatic white balance control in a wide color temperature range can be accomplished.
Claims9
A color image pickup device comprising:
- (a) image pickup means;
- (b) a filter member having a plurality of kinds of color temperature converting filters which can be alternatively arranged on an optical axis of said image pickup means;
- (c) adjusting means for adjusting relative gains of a plurality of color signals which are generated from said image pickup means;
- (d) driving means for driving said filter member to switch a color temperature converting filter arranged on the optical axis;
- and
- (e) control means for controlling said adjusting means and said driving means on the basis of signals which are picked up by said image pickup means when a color temperature converting filter which corresponds to no filter is arranged on the optical axis.
A color image pickup device comprising:
- (a) image pickup means;
- (b) a filter member having a plurality of kinds of color temperature converting filters which can be alternatively arranged on an optical axis of said image pickup means;
- (c) driving means for driving said filter member to switch a color temperature converting filter arranged on the optical axis;
- and
- (d) control means for controlling said driving means on the basis of signals which are picked up by said image pickup means when a color temperature converting filter which corresponds to no filter is arranged on the optical axis.
Dependencies are inferred from the claim text.