Image pickup device

Abstract

Abstract PURPOSE:To obtain an appropriate white balance by taking into consideration of the contribution of peripheral light and that of flashing light, combining and adjusting the colors and temperatures of the two lights. CONSTITUTION:When a release switch 13 is turned on, an arithmetic control circuit 10 controls a stop 2b so as to narrow down. In time T3 just after the stop 2b has been narrowed down to a prescribed value, a shutter 3b fully opens and closes in time T6. In the time T3 an output signal from the arithmetic control circuit 10 connected to the terminal (x) of a light measuring circuit 12 comes to a high level, and a reset integration circuit becomes operable. In time T4 a light flashing device starts flashing light, and stops flashing in time T5 when light reflected by an object attains a prescribed value. In the time T6 the outputs Y0 and Z0 of the integration circuit attain values VB and VR obtained by comulating the blue and red components of light projecting the object that an image pickup element 4 is exposing, and hence the values VB and VR are fetched to the arithmetic control circuit 10, which calculates the color and temperature of illuminating light. Based on that, the gains of variable gain amplifiers 5 and 6 are adjusted.

Inventors

• 👤 Tadashi Okino
• 👤 沖野　正

Bibliographic Details