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公开(公告)号：US20230144703A1
公开(公告)日：2023-05-11
申请号：US17766277
申请日：2020-09-29
CPC分类号： G02B27/0172 , G02B6/34 , G02B6/0031 , G02B2027/0174
摘要： A head-mounted display achieves both miniaturization and high efficiency of an optical system and expansion of an eye box. In order to achieve the above-described object, a head-mounted display that displays an image within a visual field of a user is provided. The head-mounted display includes: an image display unit that generates an image to be displayed; a projection unit that projects image light from the image display unit; an image rotation and replication unit that expands an eye box of projection light from the projection unit; and a waveguide unit that transmits image light from the image rotation and replication unit to a pupil of the user. The image rotation and replication unit includes an incidence surface, an emission surface, and at least two reflection surfaces, and an angle formed by the incidence surface and the emission surface is greater than 90°.
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公开(公告)号：US20150153633A1
公开(公告)日：2015-06-04
申请号：US14556367
申请日：2014-12-01
发明人： Toshiteru NAKAMURA , Satoshi OUCHI
CPC分类号： G03B21/008 , G03B21/2013 , G03B21/2033 , G03B21/208 , G03B21/28 , H04N5/7458 , H04N9/315
摘要： In an optical unit having a reflective picture display device for displaying pictures by projecting light, the picture display device has a first state in which focused light is reflected in an optical axis equivalent direction of an image to be displayed and a second state in which focused light is reflected so as to have a component in a vertical equivalent direction of an image to be projected, a plane including an entire optical axis of light reflected in the second state differs from a plane formed by the optical axis of light incident on the picture display device and the optical axis of light reflected by the picture display deice in the first state, and the opening size of the opening of an illumination lens in a horizontal equivalent direction of the image to be projected is larger than in the vertical equivalent direction.
摘要翻译： 在具有用于通过投射光来显示图像的反射图像显示装置的光学单元中，图像显示装置具有第一状态，其中聚焦光在要显示的图像的光轴当量方向上反射，并且第二状态被聚焦 光被反射成具有要投射的图像的垂直等效方向的分量，包括在第二状态中反射的光的整个光轴的平面与由入射在图像上的光的光轴形成的平面不同 显示装置和在第一状态下由图像显示器反射的光的光轴，并且照射透镜在待投影图像的水平当量方向上的开口的开口尺寸大于垂直方向上的开口尺寸。
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公开(公告)号：US20210364802A1
公开(公告)日：2021-11-25
申请号：US17233886
申请日：2021-04-19
摘要： An objective of the present disclosure is to provide an image display device capable of suppressing stray light and outputting a high-quality video. An image display device according to the present disclosure comprises a protective cover covering a periphery of a light guide, wherein the protective cover comprises a concave lens and a convex lens, wherein the concave lens and the light guide are disposed at intervals of 4 mm or less, and wherein the convex lens and the light guide are disposed at intervals of 5 mm or less.
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公开(公告)号：US20200233217A1
公开(公告)日：2020-07-23
申请号：US16571499
申请日：2019-09-16
发明人： Takuma KUNO , Ryuji UKAI , Toshiteru NAKAMURA , Satoshi OUCHI
摘要： A light guide plate includes: first and second internal reflective surfaces that are approximately parallel and propagate incoming image light while totally reflecting the image light; a partially reflective surface array that has a plurality of partially reflective surfaces arranged in a direction of propagating image light, the partially reflective surfaces being inclined at a predetermined angle and partially reflecting the image light; and a uniforming element that uniforms intensity distribution of image light which is reflected by the partially reflective surface array to be projected from the light guide plate. As the uniforming element, the partially reflective surface array is divided into a plurality of segments along a direction of propagating image light, and the inter-surface spacing of the partially reflective surfaces or the reflectivity of the partially reflective surfaces is configured to vary from segment to segment.
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公开(公告)号：US20170184894A1
公开(公告)日：2017-06-29
申请号：US15390822
申请日：2016-12-27
发明人： Shingo HAYASHI , Satoshi OUCHI , Yoshiho SEO , Tomoto KAWAMURA , Seiji MURATA , Takahiro MATSUDA , Toshiteru NAKAMURA
CPC分类号： G02F1/13318 , G02B26/02 , G02B27/0172 , G02B2027/0118 , G02F1/13471 , G02F1/137 , G02F1/15 , G02F1/163 , G02F1/172 , G02F2201/44 , H04N9/3155 , H04N9/3173
摘要： There are provided a dimmer that can solve practical problems including burn-in and easily change a transmittance to external light and a video display device using the same. A dimmer includes a stack of two or more light control layers that change a transmittance to incident light by controlling an applied voltage in the incident direction of the incident light. A video display device includes a video generator that generates picture light; a video projector that projects the picture light as a virtual image in the field of view of a user; the dimmer disposed on the opposite side of the projecting side of the video projector to the user for adjusting the light quantity of external light to be entered to a user's eye through the video projector; and a light controller that controls the dimmer suitable for the luminosity of external light detected at an external light detector.
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公开(公告)号：US20240151970A1
公开(公告)日：2024-05-09
申请号：US18039309
申请日：2021-12-27
发明人： Toshiteru NAKAMURA , Takuma KUNO , Takahiro MOURI
IPC分类号： G02B27/01
CPC分类号： G02B27/017 , G02B2027/0178
摘要： A head mounted display displays an image in the user's field of vision and includes a video display unit that generates the image to be displayed. A first waveguide and a second waveguide duplicate the video light from the video display unit. Each of the waveguides includes a pair of parallel main planes that confine video light by internal reflection. The first waveguide includes an incident surface that reflects video light into the inside and two or more outgoing reflective surfaces emit video light into the second waveguide. The second waveguide includes an input unit that couples video light from the first waveguide to the inside and an output unit that emits video light to the user's pupil, wherein the angle between the duplication direction of video light in the first waveguide and the duplication direction of video light in the second waveguide is less than 90°.
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公开(公告)号：US20220413204A1
公开(公告)日：2022-12-29
申请号：US17764623
申请日：2020-10-06
发明人： Ryuji UKAI , Takahiro MOURI , Takeru UTSUGI , Toshiteru NAKAMURA , Takuma KUNO , Masahito UCHIYAMA
摘要： According to the invention, a light guide plate-type video display device and a video display system that are capable of displaying a video with less color deviation and less video distortion are provided. A video display device 101 configured to display a video includes a video projection unit 200 configured to project video light, a video deflection unit 210, and a light guide portion 230. The video deflection unit 210 deflects video light emitted by the video projection unit 200 and causes the video light to propagate to the light guide portion 230, and the light guide portion 230 causes the entered video light to propagate therein and outputs the video light. Here, the video deflection unit 210 or the light guide portion 230 is configured to reduce color dispersion of the video light outputted from the light guide portion 230.
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公开(公告)号：US20210063743A1
公开(公告)日：2021-03-04
申请号：US16850254
申请日：2020-04-16
摘要： An image display device projecting an image to a user includes: an image generation unit that generates image light; a projection optical unit that projects the image light generated by the image generation unit; an image light duplication unit that duplicates and emits the image light projected by the projection optical unit; and a light-guiding unit that projects the image light duplicated by the image light duplication unit to a user, in which the projection optical unit includes at least one projection lens, and in which an interval at which the image light duplication unit duplicates the image light is smaller than an outer diameter of the projection lens.
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公开(公告)号：US20160131909A1
公开(公告)日：2016-05-12
申请号：US14936975
申请日：2015-11-10
CPC分类号： G02B27/0172 , G02B6/0041 , G02B27/0994 , G02B2027/0118 , G02B2027/0138
摘要： An image display apparatus which displays, as a virtual image, image in a visual field of a user, including an image generation section to generate image; an illumination section to illuminate light to the image generation section; and a projection section by which the image generated by the image generation section is projected, as a virtual image, into the visual field of the user, the projection section includes: a prism lens formed by integrating, by predetermined unit, a lens to generate the virtual image, with a prism provided thereon with a half mirror film which bends, in the direction of the pupil, a signal light from the image generation section; and aperture restriction unit which is provided on the incident surface of the prism lens, and which allows light in a predetermined area of the signal light from the image generation section to pass therethrough.
摘要翻译： 一种在用户的视野中显示图像作为虚像的图像显示装置，其包括用于生成图像的图像生成部分; 照明部，其向所述图像生成部照射光; 以及由图像生成部生成的图像作为虚拟图像投射到用户的视野中的投影部，投影部包括：通过以预定的单位将透镜积分以产生的棱镜透镜 虚拟图像，其上设有棱镜，半透镜膜在光瞳方向上弯曲来自图像生成部分的信号光; 以及孔径限制单元，其设置在棱镜透镜的入射表面上，并且允许来自图像生成部的信号光的预定区域中的光通过。
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公开(公告)号：US20220066215A1
公开(公告)日：2022-03-03
申请号：US17329320
申请日：2021-05-25
发明人： Toshiteru NAKAMURA , Takuma KUNO , Takahiro MOURI
摘要： A head mounted display displays an image in a user's view field and includes a projection unit projecting image light from an image display unit; and a first and second light guide plates that duplicate the image light from the projection unit. The first and second light guide plates each include a set of parallel main surfaces confining the image light by internal reflection. The first light guide plate includes an incident surface reflecting the image light inward, and two or more emission reflective surfaces emitting the image light to the second light guide plate. The incident and emission reflective surfaces are parallel to each other at an angle different from the main surface, and the second light guide plate includes an input unit coupling the image light from the first light guide plate inward, and an output unit emitting the image light to the user's pupil.
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