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US 7,458,688 B2Granted
Prism
AssigneeHewlett-Packard Development Company, L.P.
InventorsScott Lerner, Anurag Gupta
Life of this patent
Estimating the term…
Abstract
A prism includes a first internal reflection interface and a second internal reflection interface. The second internal reflection interface is crossed relative to the first internal reflection interface.
Claims22
A projection assembly, comprising:
- a prism including a first internal reflection interface, and a second internal reflection interface, wherein said second internal reflection interface crosses through said first internal reflection interface and said first internal reflection interface crosses through said second internal reflection interface, and
- a light modulator panel configured to modulate light received from said prism into display and non-display light
- wherein said first internal reflection interface is configured to reflect light from a light source to said light modulator panel and to transmit said display light from said light modulator panel, and said second internal reflection interface is configured to transmit said display light and said light from said light source and to reflect said non-display light.
A display system, comprising:
- an image processing unit;
- a light modulator panel coupled to said image processing unit and being configured to selectively modulate light incident thereon into display and non-display light;
- display optics;
- a beam dump;
- and
- a prism including a first internal reflection interface and a second internal reflection interface, said second internal reflection interface crosses through said first internal reflection interface and said first internal reflection interface crosses through said second internal reflection interface
- wherein said first internal reflection interface is configured to reflect said light incident on said light modulator panel and to transmit said display light from said light modulator panel, and said second internal reflection interface is configured to transmit said display light to said display optics and to reflect said non-display light to said beam dump.
4 more elements
A method of modulating light, comprising:
- generating unmodulated light;
- directing said unmodulated light to a prism, said prism including first and second crossed internal reflection interfaces;
- reflecting said unmodulated light from said first internal reflection interface toward a light modulator panel;
- forming display and non-display light with said light modulator panel;
- directing said display light and non-display light back to said prism such that said display light is transmitted through said first and second reflection interfaces and said non-display light is reflected by said second reflection interface.
2 more elements
A display system, comprising:
- means for generating light:
- means for forming display and non-display light;
- and
- a prism having first and second crossed internal reflection interfaces, wherein said second internal reflection interface crosses through said first internal reflection interface and said first internal reflection interface crosses through said second internal reflection interface,
- wherein said first internal reflection surface is configured to reflect light from said means for generating light to said means for forming display and non-display light, and said second internal reflection surface is configured to transmit display light in a first direction and to reflect non-display light in a second direction away from said first direction.
2 more elements
Dependencies are inferred from the claim text.