Patent ID: 6825600
Filing Date: 2004-11-30
Classification: H01J

Abstract:
A color selection apparatus comprising:a mask formed having a first axis and a second axis; and a frame supporting the mask in one of a first axis direction and a second axis direction, the mask including: a plurality of strips separated by a predetermined distance; a plurality of first beam apertures formed as tingle second axis direction slits between the strips in a center portion of the mask; a plurality of second beam apertures formed on outer portions of the mask on both sides of the center portion of the mask, the second beam apertures being divided into a plurality of individual second beam aperture units within a second axis direction single column by real bridges; and at least one dummy bridge for each individual second beam aperture unit, the at least one dummy bridge extending inwardly from the strips but not crossing completely through the individual second beam aperture unit.