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42994results about How to "Easy to produce" patented technology

Device for expanding an exit pupil in two dimensions

A diffractive beam expander (50) comprises an input grating (10), a crossed grating (20), and an output grating (30) implemented on a planar transparent substrate (7). The crossed grating (20) comprises a plurality of diffractive features (23) arranged along the lines of a first set of parallel lines (25) and along the lines of a second set of parallel lines (26) such that the lines (25) of the first set are parallel to the lines (26) of the second set. The lines of the first set have a first grating period and the lines of the second set have a second grating period. A light beam (B1) coupled into the substrate (7) by the input grating (10) impinges on the crossed grating (20) at a first location (EC1) and further locations (EC2). Interaction at the first location (EC1) provides several sub-beams (S00, S01, S10) which propagate in different directions. Further interactions at second locations (EC2) provide further sub-beams (V01, U10) which propagate in the same direction as the original in-coupled light (B1). Light is subsequently coupled out of the substrate (7) by the output grating (30) to provide a light beam (B2) which is expanded in two directions (SX, SZ) with respect to the beam (B0) impinging on the input grating. A virtual display device (200) may comprise said diffractive beam expander (50).
Owner:MAGIC LEAP

Non-flat liquid crystal display element and method of producing the same

Disclosed is a non-flat liquid crystal display (LCD) element having a liquid crystal, a sealing wall and paired substrates opposed to each other such that a major surface of the LCD element has a non-flat form. In an aspect, spacers are disposed between the substrates, and a spacer density in a predetermined region is different from that in at least a portion of the other region. In another aspect, resin structures are disposed between the substrates and are adhered to the substrates, and a resin structure adhesion area, per unit area of the substrate, with respect to the substrate in a predetermined region is different from that in at least a portion of the other region. In further another aspect, at least one of pixel form, size and arrangement pitch in a predetermined region is different from that in at least a portion of the other region. In further another aspect, the resin structures are disposed between the substrates, and at least one of resin structure form, size and arrangement pitch in a predetermined region is different from that in at least a portion of the other region. Also disclosed is a method of producing a non-flat LCD element. The method includes the steps of: holding a liquid crystal between paired flat substrates to produce a flat LCD element having an entirely flat form; and deforming the flat LCD element into a predetermined non-flat form.
Owner:MINOLTA CO LTD

Device for expanding an exit pupil in two dimensions

A diffractive beam expander (50) comprises an input grating (10), a crossed grating (20), and an output grating (30) implemented on a planar transparent substrate (7). The crossed grating (20) comprises a plurality of diffractive features (23) arranged along the lines of a first set of parallel lines (25) and along the lines of a second set of parallel lines (26) such that the lines (25) of the first set are parallel to the lines (26) of the second set. The lines of the first set have a first grating period and the lines of the second set have a second grating period. A light beam (B1) coupled into the substrate (7) by the input grating (10) impinges on the crossed grating (20) at a first location (EC1) and further locations (EC2). Interaction at the first location (EC1) provides several sub-beams (S00, S01, S10) which propagate in different directions. Further interactions at second locations (EC2) provide further sub-beams (V01, U10) which propagate in the same direction as the original in-coupled light (B1). Light is subsequently coupled out of the substrate (7) by the output grating (30) to provide a light beam (B2) which is expanded in two directions (SX, SZ) with respect to the beam (B0) impinging on the input grating. A virtual display device (200) may comprise said diffractive beam expander (50).
Owner:MAGIC LEAP INC
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