Light receiver, method and transmission system with time variable exposure configurations

Abstract

According to one embodiment, a light receiver includes a light reception module, a multi-exposure area selector, a multi-exposure controller, and a readout module. The light reception module includes N lines, each of the N lines having a plurality of light receiving elements. The multi-exposure area selector is configured to select one or a plurality of single-exposure lines and one or a plurality of multi-exposure lines. The multi-exposure controller is configured to, per the unit time, perform an exposure on the single-exposure lines one time for a first exposure time; and a first exposure and a second exposure on the multi-exposure lines. The readout module is configured to read exposure amounts of the lines line by line. The multi-exposure controller is configured to start the second exposure on the multi-exposure lines before reading of the exposure amounts of all the single-exposure lines is completed.