Systems and methods for local dimming in multi-modulation displays

A method for calibrating a projector display system, said projector display system comprising a light source, a controller, said controller receiving input image data and outputting control signals, a premod modulator receiving control signals from said controller and light from said light source, a blurring optical system receiving light from said premod modulator, and a primary modulator receiving control signals from said controller and light from said blurring optical system, the method comprising:

• displaying the first calibration image by controlling the premod modulator to display a first dot array and by controlling the primary modulator to be fully on, such that each pixel of the primary modulator conveys light received from the premod modulator through the blurring optical system along on optical path that includes a projection screen;
• capturing said first calibration image with an image capture device;
• displaying a second calibration image by controlling the premod modulator such that each pixel of the premod modulator is at its maximum brightness level and by controlling the primary modulator to display a second dot array;
• capturing said second calibration image with the image capture device;
• using the captures of the first calibration image and the second calibration image, determining mapping between the premod modulator and the primary modulator.