Patent ID: 7646541

Claim:
Display device for displaying an image comprising: a liquid-crystal display screen a backlighting system comprising: an illumination source producing an illumination beam; an optical modulator creating a modulated beam from the illumination beam, an objective positioned in the path of said modulated beam designed in order to produce an optical imaging beam and to construct a first image positioned after the objective; at least one folding mirror illuminated by the modulated beam coming from the objective, being positioned after said first image in the path of said illumination beam and constructing, from the first image, a second image on said liquid-crystal display screen; and a Fresnel lens collimating and redirecting on said liquid-crystal display screen the modulated beam reflected by said at least one folding mirror, wherein the modulated beam transmitted by the Fresnel lens back-light said liquid-crystal display screen, a controller for controlling said optical modulator and, a controller for controlling said liquid-crystal display screen such that said liquid-crystal display screen displays the image.