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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
Applicant: Hitachi-LG Data Storage, Inc.
Inventor： Toshiteru NAKAMURA , Takuma KUNO , Ryuji UKAI , Takahiro MOURI , Masahito UCHIYAMA
CPC classification number: G02B27/0172 , G02B6/34 , G02B6/0031 , G02B2027/0174
Abstract: 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
Applicant: HITACHI-LG DATA STORAGE, INC.
Inventor： Toshiteru NAKAMURA , Satoshi OUCHI
CPC classification number: G03B21/008 , G03B21/2013 , G03B21/2033 , G03B21/208 , G03B21/28 , H04N5/7458 , H04N9/315
Abstract: 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.
Abstract translation: 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
Applicant: Hitachi-LG Data Storage, Inc.
Inventor： Masahito UCHIYAMA , Toshiteru NAKAMURA , Takuma KUNO , Ryuichiro MIZUNO , Kazuhiko KUZUMAKI
Abstract: 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
Applicant: Hitachi-LG Data Storage, Inc.
Inventor： Takuma KUNO , Ryuji UKAI , Toshiteru NAKAMURA , Satoshi OUCHI
Abstract: 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
Applicant: Hitachi-LG Data Storage, Inc.
Inventor： Shingo HAYASHI , Satoshi OUCHI , Yoshiho SEO , Tomoto KAWAMURA , Seiji MURATA , Takahiro MATSUDA , Toshiteru NAKAMURA
CPC classification number: G02F1/13318 , G02B26/02 , G02B27/0172 , G02B2027/0118 , G02F1/13471 , G02F1/137 , G02F1/15 , G02F1/163 , G02F1/172 , G02F2201/44 , H04N9/3155 , H04N9/3173
Abstract: 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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Patent Agency Ranking
公开(公告)号：US20220066215A1
公开(公告)日：2022-03-03
申请号：US17329320
申请日：2021-05-25
Applicant: Hitachi-LG Data Storage, Inc.
Inventor： Toshiteru NAKAMURA , Takuma KUNO , Takahiro MOURI
Abstract: 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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公开(公告)号：US20210373424A1
公开(公告)日：2021-12-02
申请号：US17215251
申请日：2021-03-29
Applicant: Hitachi-LG Data Storage, Inc.
Inventor： Takahiro MOURI , Ryuji UKAI , Takuma KUNO , Toshiteru NAKAMURA
Abstract: A virtual image projection device that generates image light includes a light source that emits light; a microlens array that emits the light, which is emitted from the light source, as light having a predetermined angle distribution; an imaging lens that concentrates the light from the microlens array; a display unit that is irradiated with the light, which is concentrated by the imaging lens, to generate an image; and a projection unit that projects the image, which is generated by the display unit, as image light. The microlens array is disposed such that short side directions of lens cells do not line up straight.
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公开(公告)号：US20210149183A1
公开(公告)日：2021-05-20
申请号：US16754839
申请日：2018-10-30
Applicant: Hitachi-LG Data Storage, Inc.
Inventor： Seiji MURATA , Ryuji UKAI , Tomoto KAWAMURA , Toshiteru NAKAMURA
Abstract: There is provided a highly efficient virtual image projection device in a small size that displays images of high luminance in which an illumination system is reduced in size with no degradation in an effective luminous light beam. A virtual image projection device that shows video to a human eye includes a virtual light source surface (116) that emits a light beam in a predetermined angular distribution, an image forming lens (117) that condenses the light beam from the virtual light source surface (116), and a display (120) that creates video. When the virtual light source surface (116) is disposed at a nearly focal position on the front side of the image forming lens (117), the display (120) is disposed at a nearly focal position on the rear side of the image forming lens.
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公开(公告)号：US20160313560A1
公开(公告)日：2016-10-27
申请号：US15103921
申请日：2014-10-31
Applicant: HITACHI-LG DATA STORAGE, INC.
Inventor： Tomoto KAWAMURA , Satoshi OUCHI , Yoshiho SEO , Toshiteru NAKAMURA , Hidenao SAITO , Kenji KIYA , Yoshio OKAMOTO
IPC: G02B27/01
CPC classification number: G02B27/0172 , G02B27/0176 , G02B27/0179 , G02B27/20 , G02B2027/0123 , G02B2027/0138 , G02B2027/0185
Abstract: A head mounted display uses an image projection device comprising: an image generation unit for generating an image; a projection unit for guiding the image generated by the image generation unit to an observer's eyes; and a support for linking the projection unit and the image generation unit. The projection unit has a lens function which makes it easiest to see an image generated by the projection unit at a distance (Lobj) within a range between 30 cm and 3 m. Thereby, the image projection device operates at high resolution, has reduced size and weight, and reduces energy consumption.
Abstract translation: 头戴式显示器使用图像投影设备，包括：图像生成单元，用于产生图像; 投影单元，用于将由图像生成单元生成的图像引导到观察者的眼睛; 以及用于连接投影单元和图像生成单元的支撑。 投影单元具有透镜功能，使得在距离（Lobj）在30cm和3m之间的范围内看到由投影单元产生的图像最容易。 因此，图像投影装置以高分辨率工作，具有减小的尺寸和重量，并且降低能量消耗。
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公开(公告)号：US20160041396A1
公开(公告)日：2016-02-11
申请号：US14817652
申请日：2015-08-04
Applicant: Hitachi-LG Data Storage, Inc.
Inventor： Tomoto KAWAMURA , Toshiteru NAKAMURA , Yoshiho SEO , Satoshi OUCHI , Hidenao SAITO , Yoshio OKAMOTO , Kenji KIYA
CPC classification number: G02B27/0176 , G02B17/006 , G02B27/0172 , G02B2027/0112 , G02B2027/0118 , G02B2027/014 , G02B2027/015
Abstract: A video projection device 001 includes a video generation section 041 that has a micro display element 003 which generates video and an illuminating optical system 002 which illuminates a micro display element; projection section 043 that project the video which is generated by the video generation section onto the eyes of a user through an eyepiece section; and a mechanical support section 042 that connects the video generation section to the projection section using a housing section. The mechanical support section includes at least one transparent area 011 that is surrounded by the housing section, and penetrates in a direction parallel to a direction in which the video from the projection section is projected. The illuminating optical system includes a light source that emits light in a plurality of wavelength bands, and a controller 440 that controls the output of the light source.
Abstract translation: 视频投影设备001包括具有产生视频的微显示元件003和照亮微显示元件的照明光学系统002的视频产生部分041; 投影部043，其通过目镜部将由视频生成部生成的视频投影到用户的眼睛上; 以及使用壳体部分将视频产生部分连接到投影部分的机械支撑部分042。 机械支撑部分包括由壳体部分包围的至少一个透明区域011，并且沿与平行于投影部分的视频的方向平行的方向穿透。 照明光学系统包括发射多个波长带的光的光源和控制光源的输出的控制器440。
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