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US 5,184,238 AGranted
Apparatus for projecting light onto a surface having reflector means for improving the brightness of the image
AssigneeThorn EMI plc
InventorGraham L. Wright
Life of this patent
Estimating the term…
Abstract
A display device in the form of a slim screen projector has a beam-splitter and a reflector co-planar and in contact with each other. Incident light from a light source strikes the beam-splitter and reflector and a portion thereof is directed towards a mirror. Light from the mirror then passes through a louvre-screen via the beam-splitter and strikes a viewing surface on which a viewable image is formed.
Claims8
Apparatus for projecting light onto a surface comprising:
- a light source for providing polarised light;
- beam-splitting means for effecting partial reflection and partial transmission of light incident thereon from the light source;
- reflector means for reflecting light incident thereon from the light source;
- mirror means for directing towards the beam-splitting means light reflected from the beam-splitting means and also light reflected from the reflector means;
- and louvre means located on a side of the beam-splitting means remote from the light source for allowing the passage of light therethrough in a predetermined range of incident angles relative to the beam-splitting means.
2 more elements
Dependencies are inferred from the claim text.