Patent ID: 8564762

Claim:
An exposure apparatus comprising: a light source structured to emit a burst of exposure light at the start of a predetermined light emitting cycle having a first period (t 1 ); a mask retainer disposed to retain a supplied photomask over a supplied substrate where the mask overlaps an exposure window of predetermined first width (W 1 ) and the photomask is able to provide an imaging pattern projected through the exposure window and onto a photoreactive part of the supplied substrate; a blind including a plurality of movable blocking plates, the blocking plates being respectively movable so as to be disposed over respective and to-be-blocked portions of the exposure window, the movable blocking plates being further movable into first and second area outside opposed sides of the first width (W 1 ) of the exposure window; and a blind driver including a plurality of motors and a motor control unit, the motors being operatively coupled to move the blocking plates, wherein the motor control unit is operatively coupled to and thereby synchronized with a start of light burst emission signal of the light source or an equivalent of the start of light burst emission signal so that the motor control unit can identify from the start of light burst emission signal or its equivalent, when a second time period (t 2 ) is taking place wherein no bursts of the exposure light are being emitted from the light source, and wherein the blind driver is able, in response to a movement control signal provided by the motor control unit, to move at least one of the blocking plates completely through the first width (W 1 ) of the exposure window in a time duration equal to or less than said second time period (t 2 ).