Patent US 4,179,711

A solid state television camera which is free from the noise caused by defects in semiconductor substrate is disclosed. A solid state image sensor having a plurality of picture elements aligned in vertical and horizontal direction is provided to derive a picked up output signal. A memory device is also provided which has a plurality of memory cells of the same arrangement as the image sensor. A mask is provided in front of the memory device, and the mask has an opaque pattern upon receipt of a light corresponding to a defect position of the image sensor. The image sensor and the memory are driven simultaneously, and the reading out of the signal from the image sensor is controlled by the readout signal from the memory which is corresponding to the defect position of the image sensor.