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US 7,894,121 B2Granted
Light valve assembly with a holographic optical element and a method of making the same
AssigneeTexas Instruments Incorporated
InventorsVincent C. Lopes, Bradley Morgan Haskett, Steven Monroe Penn
Life of this patent
Estimating the term…
Abstract
A light valve assembly comprises a holographic optical element and a light valve that comprises an array of individually addressable pixels. The light valve assemblies can be fabricated on the die level or on a wafer-level.
Claims26
A device comprising:
- a light valve comprising an array of individually addressable pixels;
- a diffractive optical element comprising a diffractive pattern, wherein the diffractive optical element is integrated with the light valve so as to form a light valve assembly;
- and
- a light guide laminated between the diffractive optical element and a package frame of a light valve package in which the light valve is enclosed.
1 more element
A device comprising:
- a light valve comprising an array of individually addressable pixels;
- and
- a diffractive optical element comprising a diffractive pattern, wherein the diffractive optical element is integrated with the light valve so as to form a light valve assembly, wherein the diffractive optical element is laminated between a light transmissive substrate and a package frame of a light valve package in which the light valve is enclosed, and wherein the light transmissive substrate is bonded to the package frame.
A device comprising:
- a light valve comprising an array of individually addressable pixels;
- and
- a diffractive optical element comprising a diffractive pattern, wherein the diffractive optical element is integrated with the light valve so as to form a light valve assembly, wherein the diffractive pattern is embedded within a holographic material, said holographic material being attached to a transmissive light guide that is disposed between the holographic material and the light valve.
An imaging system, comprising:
- an illumination system providing illumination light;
- a light valve comprising an array of individually addressable pixels for modulating the illumination light into modulated light;
- and
- a diffractive optical element disposed between the illumination system and the light valve pixels for generating an illumination field on the light valve pixels, wherein the modulated light from the light valve pixels is substantially non-interfering so as to cause a two dimensional image on a screen.
1 more element
A method of making a light valve assembly, comprising:
- providing a plurality of diffractive optical elements on a light transmissive substrate;
- providing a plurality of light valves on a light valve substrate, wherein each light valve comprises an array of individually addressable pixels;
- assembling the light transmissive substrate with the light valve substrate so as to form a wafer assembly such that at least one of the diffractive optical elements is assembled to one of the light valves forming the light valve assembly;
- and
- singulating the wafer assembly so as to form individual light valve assemblies, wherein each light valve assembly comprises a diffractive optical element and a light valve.
2 more elements
A method of forming a light valve assembly that comprises a light valve and a diffractive optical element, the method comprising:
- providing a plurality of diffractive optical elements on a first substrate, wherein each diffractive optical element comprises a diffractive pattern in or on a surface of the first substrate;
- providing a plurality of light valves on a second substrate, wherein each light valve comprises an array of individually addressable pixels;
- assembling the first and second substrates so as to form a wafer assembly such that at least one of the diffractive optical elements is assembled to one of the light valves forming the light valve assembly;
- and
- singulating the wafer assembly so as to form individual light valve assemblies, wherein each light valve assembly comprises a diffractive optical element and a light valve.
2 more elements
A method of modulating a beam of incident light using a light valve that comprises an array of individually addressable pixels, the method comprising:
- directing the light beam onto a surface of a light guide;
- directing the light beam towards a diffractive pattern of a diffractive optical element after a refraction of the light beam at said surface of the light guide;
- directing the light beam after the diffractive pattern towards the light valve;
- and
- modulating the light beam after the diffractive pattern, wherein the diffractive pattern, the light guide, and the light valve are integrated in a light valve assembly.
2 more elements
Dependencies are inferred from the claim text.