Image mode projection using TN and PDLC displays

A laser video projection method that is based on the image mode laser has b een developed. The image mode laser is a laser with a spatial light modulat or placed inside an optically pumped high-gain laser cavity to provide area -selective e-modulation The transverse mode of this laser creates a desired image that can be projected onto a viewing screen. This method of creating a lasing projected image has the potential advantages of higher contrast a nd brightness at the faceplate over the traditional method of spatial light modulation of a uniform optical source. The elimination of scanning system s results in a simpler design without mechanical parts; also, this system c an potentially be adapted to full color with a single laser providing optic al pumping for image mode lasers of all three primary colors.