Method and device for improving linear dynamic range of PWM (Pulse Width Modulation) pixel

The invention relates to the field of integrated circuits, and aims to improve the linear dynamic range of a PWM (Pulse Width Modulation) pixel, so that pixel imaging is more similar to human eye vision imaging characteristics, and the linear dynamic range of the pixel can be greatly improved. The technical scheme adopted by the invention is that a device for improving the linear dynamic range of the PWM pixel comprises a photodiode, a reset tube, a pixel-level/column-level/array-level comparator and a pixel-level/column-level/array-level storage, input data of the storage is input by a global counter outside a pixel array, the device also comprises a clock selection circuit, and the clock with a certain frequency in the clock selection circuit can be selected at a certain moment and be input to the clock input end of the global counter to serve as the current counting clock. The device is mainly applied to integrated circuit design.