PROJECTION DISPLAY DEVICE Russian patent published in 2013 - IPC G03B21/10 H04N5/74 

FIELD: physics.

SUBSTANCE: device has a light source unit and a projection unit. The light source unit comprises solid-state light sources and a section for merging and concentrating light using a condensing lens. The projection unit comprises an optical modulator and an optical projection section. The units comprise adjustment mechanisms which allow optical axes of the condensing lens and the incident light beam to coincide with each other when the light source unit and the projection unit are connected to each other. The adjustment mechanism of the light source unit has a mechanism for holding the housing and a surface for positioning the light source unit on the outer surface of the housing of the condensing lens. The adjustment mechanism of the projection unit has a surface for positioning the projection unit on its outer surface. The positioning surfaces of the light source unit and the projection unit are adjacent to each other. In a second version, the light source unit has protrusions which serve as its base surfaces opposite the projection unit when the solid-state light sources are connected to the projection unit. The projection unit has outer protrusions which serve as base surfaces for adjoining to the corresponding base surfaces of the light source unit.

EFFECT: avoiding the need to adjust optical axes when replacing solid-state light sources and enabling projection of images at a level where characteristic brightness of multiple light sources is maintained.

3 cl, 11 dwg