Patent ID: 8224133

Claim:
An ESBG despeckler device comprising: at least one ESBG element ( 2 ; 2 A, 2 B; 90 A, 90 B; 28 a , 28 b ; 99 a , 99 b ; 3 R, 4 R, 3 G, 4 G, 3 B, 4 B, 90 ; 94 ; 96 ; 84 ; 85 ; 86 , 87 ; 88 , 89 ; 851 R, 851 G, 851 B; 86 A, 86 B, 86 C, 86 D) wherein each said ESBG element is recorded in a Holographic Polymer Dispersed Liquid Crystal sandwiched between transparent substrates to which transparent conductive coatings ( 130 , 170 ; 171 ; 173 ) have been applied, characterized in that at least one of said coatings is patterned to provide a two-dimensional array of independently switchable ESBG pixels ( 21 A, 21 B; 24 ; 25 a , 25 b , 25 c ; 26 a , 26 b , 26 c ; 27 a , 27 b , 27 c ; 85 R, 85 G, 85 B; 85 a ; 88 a , 89 a ), wherein an electrical control circuit ( 3 ; 31 ; 32 ) is operative to apply at least first and second voltages across each said ESBG pixel, wherein said ESBG element is disposed along an illumination path, wherein each said ESBG pixel is characterized by a first unique speckle state under said first applied voltage and a second unique speckle state under said second applied voltage, wherein said first and second speckle states occur during the integration time of the human eye.