A projector display system, comprising: a light source; a controller, said controller receiving an input image and outputting control signals; a first modulator, said first modulator receiving light from said light source, said first modulator receiving said control signals from said controller such that said first modulator is adapted to render a binary halftone image of said input image; a blurring optical system; said blurring optical system blurring said halftone image received from said first modulator; and a second modulator, said second modulator receiving said blurred halftone image from said blurring optical system and receiving said control signals from said controller such that said second modulator is adapted to render a pulse width modulated image to be projected to form the desired screen image, characterized in that the system is adapted to: dilated said input image to produce a dilated input image x d (m, n); determine (304b, 303b) an upper bound binary halftone image b u (m, n), based on a threshold hTLevel(m, n), wherein b u (m, n) = x d (m, n), if x d (m, n) > hTLevel(m, n); multiply the input image by the contrast ratio of the second modulator; erode the result of said multiplication to produce an eroded input image x e (m, n); determine (304c, 303c) a lower bound binary halftone image b l (m, n), based on said threshold hTLevel(m, n), wherein bi(m, n) = x e (m, n), if x e (m, n) ≤ hTLevel(m, n); and combine the upper bound binary halftone image b u (m, n) and the lower bound binary halftone image bi(m, n) by a pointwise OR-operation to form said binary halftone image. a light source; a controller, said controller receiving an input image and outputting control signals; a first modulator, said first modulator receiving light from said light source, said first modulator receiving said control signals from said controller such that said first modulator is adapted to render a binary halftone image of said input image; a blurring optical system; said blurring optical system blurring said halftone image received from said first modulator; and a second modulator, said second modulator receiving said blurred halftone image from said blurring optical system and receiving said control signals from said controller such that said second modulator is adapted to render a pulse width modulated image to be projected to form the desired screen image, characterized in that the system is adapted to: dilated said input image to produce a dilated input image x d (m, n); determine (304b, 303b) an upper bound binary halftone image b u (m, n), based on a threshold hTLevel(m, n), wherein b u (m, n) = x d (m, n), if x d (m, n) > hTLevel(m, n); multiply the input image by the contrast ratio of the second modulator; erode the result of said multiplication to produce an eroded input image x e (m, n); determine (304c, 303c) a lower bound binary halftone image b l (m, n), based on said threshold hTLevel(m, n), wherein bi(m, n) = x e (m, n), if x e (m, n) ≤ hTLevel(m, n); and combine the upper bound binary halftone image b u (m, n) and the lower bound binary halftone image bi(m, n) by a pointwise OR-operation to form said binary halftone image. dilated said input image to produce a dilated input image x d (m, n); determine (304b, 303b) an upper bound binary halftone image b u (m, n), based on a threshold hTLevel(m, n), wherein b u (m, n) = x d (m, n), if x d (m, n) > hTLevel(m, n); multiply the input image by the contrast ratio of the second modulator; erode the result of said multiplication to produce an eroded input image x e (m, n); determine (304c, 303c) a lower bound binary halftone image b l (m, n), based on said threshold hTLevel(m, n), wherein bi(m, n) = x e (m, n), if x e (m, n) ≤ hTLevel(m, n); and combine the upper bound binary halftone image b u (m, n) and the lower bound binary halftone image bi(m, n) by a pointwise OR-operation to form said binary halftone image.