Or-function illumination in phased bitplanes in a high dynamic range projector

A method comprising:

• at a projector comprising:
• a light source;
• a premod display;
• a prime display, the premod display configured to modulate light from the light source to illuminate the prime display, and a computing device, driving, using the computing device, the prime display according to a phased sequence to transition the prime display from a leading bitplane to a following bitplane;
• and,
• at least in a time period corresponding to the prime display being driven according to the phased sequence, driving, using computing device, adjacent pixel groups of the premod display according to an OR-function of premod versions of respective portions of each of at least the leading bitplane and the following bitplane.

A non-transitory computer-readable medium storing a computer program, wherein execution of the computer program is for:

• at a projector comprising:
• a light source;
• a premod display;
• a prime display, the premod display configured to modulate light from the light source to illuminate the prime display, and a computing device, driving, using the computing device, the prime display according to a phased sequence to transition the prime display from a leading bitplane to a following bitplane;
• and,
• at least in a time period corresponding to the prime display being driven according to the phased sequence, driving, using computing device, adjacent pixel groups of the premod display according to an OR-function of premod versions of respective portions of each of at least the leading bitplane and the following bitplane.