Holographic head-up display device

    公开(公告)号:US10768424B2

    公开(公告)日:2020-09-08

    申请号:US15861525

    申请日:2018-01-03

    Abstract: A holographic head-up display device has a light source portion that emits coherent light; an optical modulation portion that modulates the coherent light; a relay optical system that focuses the modulated light; a filter minor that has a reflection area at a focal position of the relay optical system and reflecting light incident through the relay optical system and an absorption area at the periphery of the reflection area and absorbing light incident through the relay optical system; and a transflective mirror that partially transmits and partially reflects light reflected by the filter minor.

    Illumination apparatus and holographic display apparatus including the same

    公开(公告)号:US10185287B2

    公开(公告)日:2019-01-22

    申请号:US15451864

    申请日:2017-03-07

    Abstract: An illumination apparatus includes a light source unit emitting coherent light in a first direction, a first light division unit, including a plurality of first slots, receiving the coherent light, each slot of the plurality of first slots reflecting a part of the coherent light in a second direction crossing the first direction, and a surface lighting plate including a plurality of second light division units, each light division unit of the plurality of second light division units includes a light guide through which light progresses, and each light division unit of the plurality of second light division units includes a plurality of second slots. Each slot of the plurality of second slots of each second light division unit reflects a part of the coherent light received from a corresponding slot of the plurality of first slots in a third direction which crosses the first and second directions.

    Backlight unit and display device including the same

    公开(公告)号:US10459149B2

    公开(公告)日:2019-10-29

    申请号:US15984069

    申请日:2018-05-18

    Abstract: A backlight unit includes: a light source unit including a point light source; and a light guide plate disposed on a path of light emitted from the light source unit, where a plurality of split patterns is defined in the light guide plate. The plurality of split patterns transmits a part of the light emitted from the light source unit and reflects a remaining part thereof, and the plurality of split patterns is concentrically arranged on the light guide plate and around the light source unit.

    Holographic display device
    6.
    发明授权

    公开(公告)号:US11137720B2

    公开(公告)日:2021-10-05

    申请号:US16352668

    申请日:2019-03-13

    Abstract: A holographic display device includes a backlight unit for emitting light and a spatial light modulator. The spatial light modulator includes a plurality of pixels and a color filter layer including a plurality of color filter groups. The pixels are arranged in a zigzag form and are configured to modulate at least one of the amplitude and phase of the light. Each of the color filter groups includes a first sub-group including a plurality of first color filters, a second sub-group including a plurality of second color filters, and a third sub-group including a plurality of third color filters, and each of the pixels is aligned with one of the first color filters, the second color filters, and the third color filters of the color filter layer.

    Backlight unit and holographic display device including the same

    公开(公告)号:US10711972B2

    公开(公告)日:2020-07-14

    申请号:US15604247

    申请日:2017-05-24

    Abstract: A backlight unit includes: a light source unit which outputs coherent light; a first reflection unit including a parabolic mirror; a second reflection unit facing the first reflection unit and including a flat mirror; and a holographic optical element which changes a path of incident light, where a reflection surface of the second reflection unit forms an acute angle with an light incident surface of the holographic optical element, and the coherent light output from the light source unit sequentially passes the first reflection unit, the second reflection unit, and the holographic optical element.

    Holographic image display device
    8.
    发明授权

    公开(公告)号:US10146182B2

    公开(公告)日:2018-12-04

    申请号:US15214721

    申请日:2016-07-20

    Abstract: A holographic image display device includes a backlight for emitting light. An optical path adjuster includes a plurality of electrowetting prisms. Each of the plurality of electrowetting prisms is configured to adjust an optical path of the light. A spatial light modulator includes a plurality of pixels. Each of the plurality of pixels is configured to modulate an amplitude or a phase of the light.

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