PROJECTION DEVICE Russian patent published in 2009 - IPC G03B21/00 

FIELD: information technologies.

SUBSTANCE: suggested device is related to systems of projection display of information on multiple access screens. Each of video cubes comprises electronic-optical unit, screen frame, projection screen, comprising internal component with applied Fresnel lens and external component with applied lens-raster structure, and system of screen fixation with screen frame, cross size of electronic-optical unit and screen frame do not exceed according cross size of screen. System of mutual fixation of video cubes is assembled so that ends of screens contact each other, system of screen fixation to screen frame comprises spring elements of screen fixation with tail and bearing ends, tail elements of spring elements of screen fixation are fixed to screen frame. At the same time on bearing ends of spring elements there are retaining units, length of which along axes of spring elements does not exceed thickness of screen, and width of retaining units in places of their crossing with internal surface of screen is less than width of bearing ends of spring elements in sections adjacent to retaining elements, in side ends of screens in direction perpendicular to end of screen, grooves are arranged according to shape of spring element retaining units with depth equal to thickness of tape, from which spring elements are made. Retaining units may be made in the form of trapezoid, smaller base of which is located in point of retaining unit crossing with internal surface of screen, and larger base coincides with end of spring element, or in the form of semicircle coupled with bearing end of spring element by chord located in point of retaining unit crossing with internal surface of screen and parallel to diametre of semicircle.

EFFECT: improved quality of information display due to reduction of observed spots on screen in projection device, including set of video cubes and system of their mutual fixation.

5 cl, 3 dwg