| 摘要 |
An image sensor for an electronic imaging device includes an array of pixel detectors. Each pixel detector includes a photosensor (2) that is constructed and arranged to detect incident light and provide a signal that represents a time integral of the detected light intensity. A signal generator device (4) is constructed and arranged to generate a reference signal that varies according to a predetermined function. A comparator (6) has a first input (18) connected to receive the photosensor signal, a second input (20) connected to receive the reference signal, and an output (22) for providing a capture signal. The comparator (6) is constructed and arranged to generate a capture signal at a time determined by comparing the photosensor signal and the reference signal. A read out device (10) is constructed and arranged to capture a read out signal upon receiving the capture signal. The read out signal represents a logarithm of the integrated detected light intensity. |
