Abstract: Apparatus and methods for displaying High Dynamic Range (HDR) imagery on a large screen suitable for viewing by a large audience in theater-size venues or domed simulators or iMax-like venues. A dual modulation method of projecting onto the front of an active projection screen and an array of high intensity light (e.g., diodes) projects the most significant bits (MSB) of the image onto the back of the screen while a standard dynamic range (SDR) video projector projects the least significant bits (LSB) of the onto the front of the screen. The result is a much higher brightness image than the projector alone can produce.