Display screen for use in front projectors
AssigneeTexas Instruments Incorporated
InventorsAndrew Gerrit Huibers, Jonathan Clayton Doan
Life of this patent
Estimating the term…
Abstract
A screen for use in image presentations comprises an array of transmissive elongated prisms. The screen is capable of delivering incident light, having an incident angle within a specific incident angle range, to the viewing area, while preventing ambient light to be directed to the viewing area.
Claims25
A screen for use in a display system, comprising:
- an array of elongated transmissive polygonal prisms disposed such that light from a light valve of the display system is directed by the screen to a viewer;
- while an ambient light is directed away from the viewer.
A method of directing image light from a projector to a viewer in a front-projecting process, the method comprising:
- directing the image light carrying an image signal from the projector to an array of elongated prisms of the screen;
- and
- delivering the image light to the viewer by the screen, comprising:
- receiving the image light by a receiving facet of an elongated prism;
- causing the received image light to evolve within the elongated prism and propagate towards an exit facet;
- and
- delivering the image light to the viewer from the exit facet.
The method from 10, wherein the incident light is substantially parallel to the exiting facet.
A method of directing image light from a projector to a viewer in a front-projecting process, the method comprising:
- directing the image light carrying an image signal from the projector to an array of elongated prisms of the screen;
- and
- delivering the image light to the viewer by the screen, comprising:
- receiving the image light by a prism;
- and
- causing the received image light to evolve within the prism and to exit from the prism towards a viewer.
A screen for displaying an image, wherein the screen turns an incident light on an average between 90 and 135 degrees, wherein the turning is accomplished by one or more totally-internally-reflective reflections.
Dependencies are inferred from the claim text.