In order to reduce changes in color balance which occur as a function of viewing angle, a 3-color projection TV system having one axial and two off-axis image projectors employs a lenticular image screen having a plurality of vertical lenticules for horizontal light distribution, all of which have the...http://www.google.de/patents/US4374609?utm_source=gb-gplus-sharePatent US4374609 - Image projection screen with decreased color shift as a function of viewing angle, and method of manufacture
