DEVICE CONTROLLING MATRIX PHOTO RECEIVER EXPOSURE TIME, GAIN AND COLOR BALANCE (VERSIONS) Russian patent published in 2008 - IPC H04N5/238 H04N9/30 

FIELD: automatics.

SUBSTANCE: invention relates to automatic systems controlling the matrix color photo receiver exposure, gain and colour balance. The proposed device controlling matrix color photo receiver exposure, gain and colour balance incorporates a circuit computing a mean-shot brightness, a 2^nd-order low-frequency digital filter, a circuit computing the difference between the mean-shot brightness and the preset brightness, a non-linear correcting circuit, a second integrator used to set the photo receiver exposure, a circuit determining the sign of a signal coming from the non-linear correcting circuit, a circuit setting the first integrator gain, a circuit setting the second integrator gain and the gain scaling circuit.

EFFECT: automatic control over colour balance, elimination of brightness pulsation, ruling out low-amplitude auto-oscillations, smaller time of the control system transient processes.

3 cl, 5 dwg