Image sensor and method of correction output signal of the image sensor

摘要

A pixel array includes an array of pixels to receive light, a first pixel to be blocked from receiving the light, and a circuit to adjust signals output from pixels in the array based on a signal from the first pixel. The signals output from the pixels in the array include a first error value. The circuit reduces the first error value in the signals from the pixels in the array based on the signal from the first pixel. The circuit may also reduce a second error value in the signals output from the pixels in the array based on a signal from a second pixel. The first and second pixels may be outside of the pixel array. The first and second error values may be storage diode leakage value and a dark current value.

主权项

1. An image sensor, comprising:
a row driver configured to generate a storage control signal, a transfer control signal, a reset control signal, and a row selecting signal; a pixel array including an optical black sample array adjacent to an active array, the pixel array configured to receive optical signals and convert the optical signals to electric signals and configured to output the electric signals as image signals in response to the storage control signal, the transfer control signal, the reset control signal, and the row selecting signal; an analog-to-digital converter configured to perform an analog-to-digital conversion on the image signals to generate first signals; and an output correcting circuit configured to compare values of signals output from the active array with values of signals output from the optical black sample array, and configured to correct the signals output from the active array to generate second signals based on the comparison.