Light valve projector for HDTV with 1600 lm light output using a 400 W lamp

Describes an improved light-valve system for color picture projection. An increased resolution is achieved by using finer carrier gratings regarding the deformation behaviour of the control layer. The efficiency of the light-valve is amended by applying cylindric lenses for illumination and use of interference filter stripes in the dark-filter system. In addition a new projection lamp with increased electro-optic efficiency is used. The concept for a projector with HDTV-capability is presented, whereby the total light output is 1600 lm by using a 400 W lamp.