FRONT PROJECTION SCREEN AND PROJECTION SYSTEM COMPRISING THE SAME

摘要

PURPOSE: A front projection screen and a projection system including the same are provided to prevent a reduction of a contrast ratio due to light irradiating into an area excluding a reflection surface because light passing through a non-reflective surface disappears inside a lens unit by forming the lens unit and base unit using a black colored resin. CONSTITUTION: A front projection screen and a projection system including the same comprise a base unit and lens unit(20). The lens unit comprises a reflection surface(22) diffusing and reflecting light to one surface of the base unit and a non-reflective surface(24). A lens of which the cross section is a triangularly shaped is arranged in the lens unit as a form of successive concentric circles. The tilt angle of the reflective surface of the lens increases further from the center of the concentric circles. The tilt angle of the reflection of the lens closest to the center of the concentric circle is 1 to 10 degrees. The tilt angle of the reflection of the lens the farthest from the center of the concentric circle is 15 to 45 degrees.