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 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 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 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 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 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 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. <EOS>