Patent ID: 6799851
Filing Date: 2004-10-05
Classification: H04N

Abstract:
An optical projection system using a color drum, the optical projection system including the color drum outputting an incident light through a predetermined number of color bands on a drum plane, wherein a light outputted from an end of a light projecting plane outputting the incident light has an incident angle equal to or smaller than 30Â° on the color band, the optical projection system comprising:a light source; a rod lens receiving the light from the light source, the rod lens having the light projecting plane inside the color drum to output the received light; the color drum having the predetermined number of the color bands on a color drum plane to output the incident light from the light projecting plane through the color bands; a panel receiving the light outputted from the color drum to modulate to output the received light in accordance with a gray level; and a screen receiving the modulated light from the panel to display.