WO2023273175A1 - Module optique et dispositif d'affichage monté sur la tête - Google Patents

Module optique et dispositif d'affichage monté sur la tête Download PDF

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Publication number
WO2023273175A1
WO2023273175A1 PCT/CN2021/136797 CN2021136797W WO2023273175A1 WO 2023273175 A1 WO2023273175 A1 WO 2023273175A1 CN 2021136797 W CN2021136797 W CN 2021136797W WO 2023273175 A1 WO2023273175 A1 WO 2023273175A1
Authority
WO
WIPO (PCT)
Prior art keywords
linear polarizer
light
phase retarder
lens
optical module
Prior art date
Application number
PCT/CN2021/136797
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English (en)
Chinese (zh)
Inventor
宋文宝
赵同磊
关姝
Original Assignee
歌尔光学科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 歌尔光学科技有限公司 filed Critical 歌尔光学科技有限公司
Publication of WO2023273175A1 publication Critical patent/WO2023273175A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B27/0172—Head mounted characterised by optical features

Definitions

  • the invention relates to the technical field of optical display, in particular to an optical module and a head-mounted display device.
  • the display screen is used to emit light, and after the light emitted by the display screen enters the human eye, the user obtains an imaging image.
  • the light emitted by the display screen needs to pass through various lenses and other optical devices during the transmission process.
  • the optical devices will reflect the light, and the reflected light will shine on the display screen.
  • the display screen is provided with a plurality of optical surfaces, and these optical surfaces can reflect light, and the reflected light forms stray light, which enters the human eye, resulting in unclear imaging images obtained by users, and even ghost images.
  • An imaging mirror group is arranged on a side of the first linear polarizer away from the display screen.
  • the first phase retarder and the first linear polarizer are arranged on the light-emitting surface of the display screen;
  • the first phase retarder and the first linear polarizer have a film structure, and the first phase retarder and the first linear polarizer are arranged in the imaging mirror group.
  • the installation position of the first phase retarder and the first linear polarizer is an installation surface, and the installation surface is one of a plane, a spherical surface, an aspherical surface, a free-form surface or a cylindrical surface.
  • the optical module also includes a second phase retarder, a third phase retarder, a polarizing reflector, and a second linear polarizer arranged in sequence along the light propagation direction, and the first lens is arranged between the second phase retarder and the second linear polarizer.
  • the third phase retarder the second lens is arranged on the side of the second linear polarizer away from the display screen, and a beam splitter is arranged between the second phase retarder and the first lens , the transmission axis of the polarizing reflector is perpendicular to the transmission axis of the first linear polarizer, and the transmission axis of the polarizing reflector is parallel to the transmission axis of the second linear polarizer.
  • the present invention also provides a head-mounted display device, the head-mounted display device includes a casing and an optical module as described above, and the optical module is arranged on the casing.
  • the light emitted by the display screen needs to pass through various lenses and other optical devices during the transmission process.
  • the optical devices will reflect the light, and the reflected light will shine on the display screen.
  • the light 110 emitted by the display screen 10 passes through the first phase retarder 20 and the first linear polarizer 30 in sequence, and when the light 110 passes through the imaging lens group 40, the light 110 is reflected, and this part of the light 110 is stray light 430.
  • the stray light 430 propagates backward along the original propagation path of the light ray 110 .
  • the stray light 430 first passes through the first linear polarizer 30 , and the stray light 430 is converted into the linearly polarized light 110 .
  • the stray light 430 continues to propagate through the first phase retarder 20. Under the action of the first phase retarder 20, the stray light 430 in the linear polarization state is converted into a circular polarization state.
  • the circular polarization state can be left-handed or right-handed. Rotate polarized light.
  • the stray light 430 spreads and irradiates on the display screen 10, and under the action of the display screen 10, the stray light 430 is reflected again.
  • the rotation direction of the light 110 in the circularly polarized state changes, and the left-handed polarized light is converted into a right-handed polarized light.
  • Right-handed polarized light is converted to left-handed polarized light.
  • the circularly polarized light 110 passes through the first phase retarder 20 again, it is transformed from a circularly polarized state into a linearly polarized state.
  • Orthogonal, stray light 430 cannot pass through the first linear polarizer. It can be seen that the stray light 430 cannot enter the imaging lens group 40 , and similarly, the stray light 430 cannot enter the user's eyes, thereby ensuring that the user obtains a higher-definition imaging picture.
  • the first phase retarder 20 and the first linear polarizer 30 are film structure, the first phase retarder 20 and the first linear polarizer 30
  • the first linear polarizer 30 is arranged on the display screen 10; in this way, it can be attached or coated, and the attached method is easy to operate and convenient for production.
  • the coating method can make the first phase retarder 20 and the first linear polarizer 30 more firmly arranged, and improve the compactness of the film layer.
  • the light 110 can be refracted and reflected in the imaging lens group 40 .
  • the imaging lens group 40 includes a first lens 410 and a second lens 420, the first lens 410 is arranged on the side of the first linear polarizer 30 facing away from the display screen 10, and the second lens 420 is arranged on the side of the first lens 410 facing away from the display One side of the screen 10;
  • the optical module also includes a second phase retarder 50, a third phase retarder 60, a polarizing reflector 70 and a second linear polarizer 80 arranged in sequence along the propagation direction of the light 110, and the first lens 410 is arranged on Between the second phase retarder 50 and the third phase retarder 60, the second lens 420 is arranged on the side of the second linear polarizer 80 away from the display screen 10, and a light splitter is arranged between the second phase retarder 50 and the first lens 410
  • the transmission axis of the polarizing reflector 70 is perpendicular to the transmission axis of the first linear
  • the light incident surface and the light exit surface of the first lens 410 are convex
  • the light incident surface of the second lens 420 is flat
  • the light exit surface of the second lens 420 is convex.
  • the first lens 410 is a biconvex lens
  • the second lens is a plano-convex lens. The combination of the first lens 410 and the second lens 420 can ensure that the light 110 is effectively converged and imaged.
  • the light incident surface of the second lens 420 is a plane, and the plane is flatter to facilitate the bonding arrangement of the third phase retarder 60 , the polarizing reflector 70 and the second linear polarizer 80 .
  • the present invention also provides a head-mounted display device.
  • the head-mounted display device includes a casing and an optical module as above, and the optical module is arranged on the casing.
  • the casing can provide an installation space for supporting the optical module, and the optical module is arranged in the casing, so that moisture or dust in the external environment can be prevented from falling into the interior of the optical module.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)

Abstract

L'invention concerne un module optique et un dispositif d'affichage monté sur la tête. Le module optique comprend un écran d'affichage (10), un premier retardateur de phase (20), un premier polariseur linéaire (30) et un groupe de lentilles d'imagerie (40), l'écran d'affichage (10) étant utilisé pour émettre de la lumière (110) ; le premier retardateur de phase (20) et le premier polariseur linéaire (30) sont agencés séquentiellement dans la direction de propagation de la lumière (110), le premier polariseur linéaire (30) est pourvu d'un axe de transmission pour la transmission de lumière, et d'un angle inclus entre l'axe de transmission du premier polariseur linéaire (30) et un axe rapide du premier retardateur de phase (20) est de 45° ; et le groupe de lentilles d'imagerie (40) est disposé sur le côté du premier polariseur linéaire (30) qui est éloigné de l'écran d'affichage (10). Le module optique et le dispositif d'affichage monté sur la tête peuvent réduire la quantité de lumière parasite qui entre dans les yeux d'un utilisateur, garantissant ainsi que l'utilisateur obtient des images d'imagerie haute définition.
PCT/CN2021/136797 2021-06-28 2021-12-09 Module optique et dispositif d'affichage monté sur la tête WO2023273175A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110731313.4 2021-06-28
CN202110731313.4A CN113448101A (zh) 2021-06-28 2021-06-28 光学模组和头戴显示设备

Publications (1)

Publication Number Publication Date
WO2023273175A1 true WO2023273175A1 (fr) 2023-01-05

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ID=77814100

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Application Number Title Priority Date Filing Date
PCT/CN2021/136797 WO2023273175A1 (fr) 2021-06-28 2021-12-09 Module optique et dispositif d'affichage monté sur la tête

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CN (1) CN113448101A (fr)
WO (1) WO2023273175A1 (fr)

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CN113448101A (zh) * 2021-06-28 2021-09-28 歌尔股份有限公司 光学模组和头戴显示设备
CN114236836A (zh) * 2021-11-30 2022-03-25 歌尔光学科技有限公司 一种光学模组以及头戴显示设备
CN114236827A (zh) * 2021-11-30 2022-03-25 歌尔光学科技有限公司 一种光学模组以及头戴显示设备
WO2023176365A1 (fr) * 2022-03-14 2023-09-21 日東電工株式会社 Unité de lentille, stratifié, corps d'affichage, procédé de fabrication de corps d'affichage et procédé d'affichage
WO2023176361A1 (fr) * 2022-03-14 2023-09-21 日東電工株式会社 Système d'affichage, procédé d'affichage, corps d'affichage et procédé de fabrication de corps d'affichage
WO2023176357A1 (fr) * 2022-03-14 2023-09-21 日東電工株式会社 Unité de lentille, stratifié, corps d'affichage, procédé de fabrication de corps d'affichage et procédé d'affichage
WO2023176368A1 (fr) * 2022-03-14 2023-09-21 日東電工株式会社 Partie de lentille, stratifié, corps d'affichage et procédé de fabrication et procédé d'affichage pour corps d'affichage
WO2023176363A1 (fr) * 2022-03-14 2023-09-21 日東電工株式会社 Système d'affichage, procédé d'affichage, corps d'affichage et procédé de fabrication de corps d'affichage
WO2023176366A1 (fr) * 2022-03-14 2023-09-21 日東電工株式会社 Unité de lentille, corps stratifié, corps d'affichage, procédé de fabrication de corps d'affichage et procédé d'affichage
WO2023176362A1 (fr) * 2022-03-14 2023-09-21 日東電工株式会社 Système d'affichage, procédé d'affichage, corps d'affichage et procédé de fabrication de corps d'affichage
WO2023176367A1 (fr) * 2022-03-14 2023-09-21 日東電工株式会社 Partie de lentille, corps stratifié, corps d'affichage, procédé de production de corps d'affichage et procédé d'affichage
WO2023176359A1 (fr) * 2022-03-14 2023-09-21 日東電工株式会社 Procédé d'affichage
WO2023176360A1 (fr) * 2022-03-14 2023-09-21 日東電工株式会社 Partie de lentille, stratifié, corps d'affichage et procédé de fabrication et procédé d'affichage pour corps d'affichage
WO2023176358A1 (fr) * 2022-03-14 2023-09-21 日東電工株式会社 Unité de lentille, stratifié, corps d'affichage et procédé de production de corps d'affichage et procédé d'affichage
TWI791399B (zh) * 2022-04-21 2023-02-01 新鉅科技股份有限公司 光學透鏡組及頭戴式電子裝置
CN114911059A (zh) * 2022-06-10 2022-08-16 京东方科技集团股份有限公司 光学显示装置及头戴式显示设备

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CN105807359A (zh) * 2016-05-30 2016-07-27 京东方科技集团股份有限公司 线偏光层、圆偏光层、柔性显示装置及其制备方法
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CN113448101A (zh) * 2021-06-28 2021-09-28 歌尔股份有限公司 光学模组和头戴显示设备

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