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US 6,618,106 B1Granted
Sunlight viewable color liquid crystal display using diffractive color separation microlenses
AssigneeBAE Systems Information and Electronics Systems Integration Inc.
InventorsThomas V. Gunn, Michael P. Schmidt
Life of this patent
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Abstract
A high brightness, high color saturation liquid crystal display permits direct sunlight viewing. The display includes one or more diffractive color separation microlenses, in one embodiment, trimodal, which serves both to spatially separate incoming white light into red, green and blue bands and to focus the bands onto a subpixel matrix. A stepped and segmented surface of at least one microlens enables that microlens to provide a plurality of diffraction patterns.
Claims2
A liquid crystal display that permits direct sunlight viewing, comprising:
- one or more diffractive color separation microlenses for receiving light from a collimated source, each of the microlenses having a surface area including a number of diffraction grating lines designed to perform diffraction separation, with the surface area of at least one microlens having a plurality of segments, where a first of the segments has a first diffraction pattern, second of the segments has a second diffraction pattern, and a third of the segments has a third diffraction pattern.
Dependencies are inferred from the claim text.