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    DISPLAY DEVICE AND PROJECTOR USING HOLOGRAPHIC OPTICAL ELEMENT
    2.
    发明公开
    DISPLAY DEVICE AND PROJECTOR USING HOLOGRAPHIC OPTICAL ELEMENT 审中-实审

    公开(公告)号：EP4432017A1

    公开(公告)日：2024-09-18

    申请号：EP22911923.5

    申请日：2022-12-21

    申请人： Samsung Electronics Co., Ltd.

    发明人： BAE, Jungkweon ,  KEUM, Changmin ,  LEE, Seunghyun

    IPC分类号： G03H1/04 ,  G03B21/20

    CPC分类号： G03H1/04 ,  G03B21/20

    摘要： A projector and display apparatus using a holographic optical element are provided. The projector includes a first display unit configured to emit a first beam of a first image, a second display unit configured to emit a second beam of a second image, a first transmissive holographic optical element configured to separate the first beam into a first diffracted beam and a second diffracted beam such that pixels of the first image overlap each other, a second transmissive holographic optical element configured to separate the second beam into a third diffracted beam and a fourth diffracted beam such that pixels of the second image overlap each other, a reflective holographic optical element configured to diffract and reflect the third and fourth diffracted beams in the same direction as the first and second diffracted beams such that the first image and the second image at least partially overlap each other, and a projection lens.

    PROJECTION DISPLAY SYSTEM AND FULL-COLOR PROJECTION LIGHT MACHINE
    5.
    发明公开
    PROJECTION DISPLAY SYSTEM AND FULL-COLOR PROJECTION LIGHT MACHINE 审中-实审

    公开(公告)号：EP4400911A1

    公开(公告)日：2024-07-17

    申请号：EP21957870.5

    申请日：2021-09-24

    申请人： Huawei Technologies Co., Ltd.

    发明人： LUO, Kun ,  ZHAO, Pengfei ,  JIANG, Congbiao

    IPC分类号： G03B21/20 ,  G02B27/01

    CPC分类号： G02B27/01 ,  G03B21/20

    摘要： A projection display system (200) and a full-color projection optical engine (1300) are disclosed. The projection display system (200) includes a red light-emitting pixel array (201), a blue light-emitting pixel array (203), a green light-emitting pixel array (202), and a light-combining prism (204). The light-combining prism (204) is disposed in optical paths of red light emitted by the red light-emitting pixel array (201), blue light emitted by the blue light-emitting pixel array (203), and green light emitted by the green light-emitting pixel array (202). Pixel dimensions of the blue light-emitting pixel array (203) and pixel dimensions of the green light-emitting pixel array (202) are both smaller than pixel dimensions of the red light-emitting pixel array (201). At least one group of pixel expansion apparatuses (205) is disposed between the red light-emitting pixel array (201) and the light-combining prism (204). The at least one group of pixel expansion apparatuses (205) is configured to obtain expanded red light based on the red light, where resolution of an image obtained based on the expanded red light is n times resolution of an image obtained based on the red light, and n > 1. The light-combining prism (204) is configured to: combine the expanded red light, the blue light, and the green light, and emit combined light along a same direction. On the premise of ensuring that the projection optical engine (1300) is small in volume, the projection display system (200) not only can ensure light-emitting efficiency but also is capable of not reducing display resolution.

    LIGHT SOURCE DEVICE
    7.
    发明公开
    LIGHT SOURCE DEVICE 审中-公开

    公开(公告)号：EP4394499A1

    公开(公告)日：2024-07-03

    申请号：EP23218013.3

    申请日：2023-12-19

    申请人： Ushio Denki Kabushiki Kaisha

    发明人： MATSUSHIMA, Takeo ,  FUKUDA, Yusuke

    IPC分类号： G03B21/20 ,  G02B19/00 ,  G02B3/00 ,  G02B27/30

    CPC分类号： G02B3/0037 ,  G02B19/0014 ,  G02B19/0066 ,  G02B27/30 ,  G03B21/208 ,  G03B21/2033 ,  G03B21/2013

    摘要： A light source device (1) includes a plurality of LEDs (3), a collimating optical system (5) disposed corresponding to the plurality of LEDs (3), a condensing optical system (7) that condenses light exiting from the collimating optical system (5), and a fly-eye integrator (10) into which the light exiting from the condensing optical system (7) is incident. Assuming that parallel light is defined as a virtual secondary light source (VS1), the parallel light being obtained from light traveling from a virtual primary light source (VS1) disposed at a back focus position of the condensing optical system (7) toward the condensing optical system (7) with a maximum effective acceptance angle (θL) of the fly-eye integrator (10) as a divergence angle and then passing through the condensing optical system (7), the virtual secondary light source (VS2) has a width that substantially coincides with a width of a secondary light source determined according to a shape of a light exit surface of the collimating optical system (5).