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WO2025234099A1 - Visiocasque - Google Patents

Visiocasque

Info

Publication number
WO2025234099A1
WO2025234099A1 PCT/JP2024/017451 JP2024017451W WO2025234099A1 WO 2025234099 A1 WO2025234099 A1 WO 2025234099A1 JP 2024017451 W JP2024017451 W JP 2024017451W WO 2025234099 A1 WO2025234099 A1 WO 2025234099A1
Authority
WO
WIPO (PCT)
Prior art keywords
display
display panel
image
head
light
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/JP2024/017451
Other languages
English (en)
Japanese (ja)
Inventor
正太郎 只
恭敏 勝田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Interactive Entertainment Inc
Original Assignee
Sony Interactive Entertainment Inc
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 Sony Interactive Entertainment Inc filed Critical Sony Interactive Entertainment Inc
Priority to PCT/JP2024/017451 priority Critical patent/WO2025234099A1/fr
Publication of WO2025234099A1 publication Critical patent/WO2025234099A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Definitions

  • This disclosure relates to a head-mounted display.
  • a head-mounted display that has a display panel that displays images and an optical system that includes a lens.
  • the inventors of the present application are considering providing a head-mounted display that uses multiple display panels, including one capable of displaying high-resolution images, and optical mirrors that reflect and transmit image light emitted from those display panels.
  • a configuration that uses multiple display panels and optical mirrors there is a risk that image light may be emitted in an unintended direction, resulting in so-called ghosting and degraded image quality.
  • One of the purposes of this disclosure is to provide a head-mounted display that can suppress degradation of image quality.
  • the head-mounted display proposed in this disclosure comprises a first display panel that displays a first display image at a first resolution, a second display panel that displays a second display image at a second resolution higher than the first resolution, an optical mirror that transmits at least a portion of the first image light emitted from the first display panel and reflects at least a portion of the second image light emitted from the second display panel, an eyepiece that receives the first image light that has transmitted through the optical mirror and the second image light that has been reflected by the optical mirror and allows a user to view a display image based on the first display image and the second display image, and an emission angle restriction means that restricts the emission angle of the second image light with respect to the display surface of the second display panel.
  • FIG. 1 is a perspective view showing an HMD according to an embodiment of the present invention.
  • FIG. 2 is a diagram schematically illustrating the configuration of a display panel and an optical system according to the present embodiment.
  • FIG. 10 is a diagram illustrating an example of a display image.
  • FIG. 10 is a diagram showing an example in which a louver film is used as an emission angle restricting means.
  • FIG. 10 is a diagram showing an example of the arrangement of a second display panel and an optical mirror.
  • FIG. 10 is a diagram showing an example of the arrangement of a second display panel and an optical mirror.
  • FIG. 10 is a diagram showing an example of the arrangement of a second display panel and an optical mirror.
  • the head-mounted display 1 will be referred to as the "HMD (Head Mounted Display) 1."
  • HMD Head Mounted Display
  • the directions indicated by X1 and X2 in the drawings will be the right and left, respectively
  • the directions indicated by Y1 and Y2 in the drawings will be the up and down, respectively
  • the directions indicated by Z1 and Z2 in the drawings will be the front and back, respectively. These directions indicate the directions as seen by a user wearing the HMD 1.
  • FIG. 1 is a perspective view showing an HMD according to this embodiment.
  • the HMD 1 preferably has a wearing band that surrounds the user's head and a main body housing that is supported at the front of the wearing band.
  • the main body housing contains components such as display panels and an optical system.
  • the HMD 1 shown in FIG. 1 is an example, and the shapes of the wearing band and the main body housing are not limited to those shown.
  • FIG. 2 is a diagram schematically illustrating the configuration of the display panel and optical system in this embodiment.
  • the HMD 1 includes a first display panel 10, a second display panel 20, an optical mirror 30, and an eyepiece 40.
  • the thick arrows in FIG. 2 indicate the traveling direction of orthogonal light of the image light.
  • Orthogonal light is light that travels in a direction perpendicular to the display surface.
  • the first display panel 10 may display two-dimensional or three-dimensional images, and may be, for example, a liquid crystal panel or an organic electroluminescence display device, but the type of the first display panel 10 is not particularly limited.
  • the second display panel 20 may display two-dimensional or three-dimensional images.
  • the second display panel 20 may be, for example, a liquid crystal panel or an organic electroluminescence display device, but the type of the second display panel 20 is not particularly limited. In this embodiment, an example will be described in which a micro OLED (Organic Light-Emitting Diode) display is used as the second display panel 20.
  • OLED Organic Light-Emitting Diode
  • Display image D] 3 is a diagram showing an example of a display image, in which a display image D is formed based on a first display image D1 and a second display image D2.
  • the first display panel 10 displays a first display image D1.
  • the second display panel 20 displays a second display image D2, which together with the first display image D1 forms the display image D.
  • the second display image D2 preferably has a higher resolution than the first display image D1.
  • the resolution of the second display image D2 may be 4K (number of pixels: 3840 x 2160) or 8K (number of pixels: 7680 x 4320).
  • the second display panel 20 may also be smaller than the first display panel 10. In other words, the area of the second display image D2 may be smaller than the area of the first display image D1.
  • the second display image D2 is an image displayed in the center of the display image D
  • the first display image D1 is an image displayed in the periphery of the second display image D2.
  • first display panel 10 and a second display panel 20 as in this embodiment, it is possible to reduce the cost required for the display panels and enable the user U to view high-quality images.
  • the area of the first display image D1 corresponding to the area where the second display image D2 is displayed may be left blank as shown in Figure 3, or an image identical to the second display image D2 may be displayed superimposed thereon.
  • the optical mirror 30 has a function of transmitting at least a part of the first image light emitted from the first display panel 10 and reflecting at least a part of the second image light (emitted light) emitted from the second display panel 20.
  • the coarsely hatched area indicates the area through which the first image light emitted from the first display panel 10 and transmitted through the optical mirror 30 passes. As shown in Figure 2, at least a portion of the first image light emitted from the first display panel 10 passes through the optical mirror 30 and enters the eyepiece lens 40.
  • the finely hatched area indicates the area through which the second image light emitted from the second display panel 20 and reflected by the optical mirror 30 passes. As shown in Figure 2, at least a portion of the second image light emitted from the second display panel 20 is reflected by the optical mirror 30 and enters the eyepiece lens 40.
  • the eyepieces 40 are convex lenses located in front of the right and left eyes of the user U when the HMD 1 is in use.
  • the eyepieces 40 refract the incident first and second image light and allow the light to be incident on the retinas of the user U.
  • the eyepieces 40 have the function of enlarging the images displayed on the first and second display panels 10 and 20 so that the user can view them.
  • the eyepieces 40 are preferably positioned so that their optical axes 40C are perpendicular to the display surface of the first display panel 10.
  • the eyepieces 40 may be composed of two or more lenses.
  • the eyepieces 40 may also be Fresnel lenses or liquid crystal lenses.
  • Liquid crystal control film 50 In a configuration employing the first display panel 10, the second display panel 20, and the optical mirror 30, so-called ghosting may occur due to the second image light emitted from the second display panel 20, resulting in degradation of the image quality of the display image D. Specifically, ghosting may occur due to the second image light that is directly incident on the eyepiece 40 without passing through the optical mirror 30.
  • the optical paths of the second image light that cause ghosting are shown as optical paths P1 and P2.
  • the second image light passing through optical path P1 may cause ghosting in the first display image D1
  • the second image light passing through optical path P2 may cause ghosting in the second display image D2. Therefore, in this embodiment, a configuration is adopted in which a liquid crystal control film 50, which serves as an emission angle restricting means, is provided on the display surface of the second display panel 20.
  • the liquid crystal control film 50 is a film that can reduce the amount of light emitted from the second display panel 20 depending on the direction of emission.
  • the liquid crystal control film 50 can block emitted light that passes through optical path P1 or optical path P2 by changing the arrangement of the liquid crystal molecules contained within the film.
  • the transmittance of the second image light through the liquid crystal control film 50 decreases. Therefore, for example, it is advisable to control the arrangement of liquid crystal molecules so that the liquid crystal control film 50 blocks oblique light that is inclined at an angle of 20° to 30° or more relative to normal light.
  • the liquid crystal control film 50 is used as an example of the output angle restricting means, but the invention is not limited to this and may be any other means that has the function of restricting the output angle of the second image light relative to the display surface of the second display panel 20.
  • the output angle restricting means may be a film that can block oblique light and transmit perpendicular light by changing the arrangement of liquid crystal molecules in the liquid crystal panel.
  • the output angle restricting means may be, for example, a commercially available film that is generally used as an anti-peeping film.
  • the output angle restricting means is not limited to a film-like member and may be any optical component that has the function of reducing the amount of light emitted from the second display panel 20 depending on the output direction.
  • FIG 4 shows an example in which a louver film 150 is used as the emission angle control means.
  • the louver film 150 includes multiple transmissive portions 150a and multiple light-shielding portions 150b, with the transmissive portions 150a and light-shielding portions 150b arranged alternately.
  • the transmissive portions 150a and light-shielding portions 150b are preferably formed in a grid or stripe pattern in a planar view.
  • the light-shielding portions 150b are preferably wall-shaped and have a predetermined height in the thickness direction of the louver film 150.
  • the light-shielding portions 150b block the second image light emitted from the second display panel 20 in a direction oblique to the display surface.
  • the distance (pitch) between each wall of the louver film 150 should be, for example, 20 ⁇ m or less to prevent it from being visible to the user.
  • the second display panel 20 may also have a built-in function to reduce the amount of emitted light depending on the direction of emission.
  • the second display panel 20 may also be a liquid crystal panel with a built-in function to change the alignment of liquid crystal molecules. In this case, there is no need to provide a separate liquid crystal control film 50.
  • a half mirror having a transmission-to-reflection ratio of 1:1 for light of a specific wavelength is used as the optical mirror 30.
  • the inclination angle ⁇ 1 of the display surface of the first display panel 10 relative to the optical mirror 30 and the inclination angle ⁇ 2 of the display surface of the second display panel 20 relative to the optical mirror 30 are set to be the same. This allows the first image light emitted from the first display panel 10 and the second image light emitted from the second display panel 20 to be incident on the optical mirror 30 at the same angle, thereby forming a desired display image D.
  • the transmission-to-reflection ratio of the optical mirror 30 may be adjusted to an optimal ratio taking into account the luminance of the first display panel 10 and the second display panel 20.
  • the first display panel 10, the second display panel 20, and the optical mirror 30 are preferably arranged so that the tilt angles ⁇ 1 and ⁇ 2 are less than 45°.
  • Figure 6 shows an example in which the tilt angles ⁇ 1 and ⁇ 2 are 45°
  • Figure 7 shows an example in which the tilt angles ⁇ 1 and ⁇ 2 are 30°.
  • the proportion of the second display image D2 in the display image D can be increased. This makes it possible for the user to view a high-quality display image.
  • the second display panel 20 is positioned so that the tilt angle ⁇ 3 of its display surface relative to the plane S perpendicular to the optical axis 40C of the eyepiece 40 is greater than 90°. This makes it less likely that the second image light emitted from the second display panel 20 will be directly incident on the eyepiece 40. Therefore, the range of regulation of the emission angle of the second image light by the emission angle regulation means can be relaxed, and the transmittance of the emission angle regulation means can be improved.
  • the second display panel 20 be positioned outside the user U's field of vision so that the panel itself is not visible to the user U.
  • the head-mounted display can be configured as follows: (1) a first display panel that displays a first display image at a first resolution; a second display panel that displays a second display image having a second resolution higher than the first resolution; an optical mirror that transmits at least a portion of a first image light emitted from the first display panel and reflects at least a portion of a second image light emitted from the second display panel; an eyepiece onto which the first image light transmitted through the optical mirror and the second image light reflected by the optical mirror are incident, and which allows a user to view a display image based on the first display image and the second display image; an emission angle restricting means for restricting an emission angle of the second image light with respect to a display surface of the second display panel;
  • a head-mounted display having (2) the emission angle restricting means is an optical component that can reduce the amount of light emitted from the second display panel in accordance with the emission direction, and is provided on a display surface of the second display panel.
  • the emission angle restricting means has a function of reducing the amount of emitted light in accordance with the emission direction, the second display panel has the emission angle restriction means built therein;
  • the second display panel is a liquid crystal panel, the emission angle control means is a film capable of changing the alignment of liquid crystal molecules of the liquid crystal panel, and is provided on the display surface of the second display panel.
  • the emission angle control means has a function of changing the alignment of liquid crystal molecules, the second display panel is a liquid crystal panel incorporating the emission angle restricting means;
  • the emission angle control means is a film including a plurality of light-transmitting portions and a plurality of light-blocking portions, the light-transmitting portions and the light-blocking portions being alternately arranged, and the film is provided on the display surface of the second display panel.
  • the second display panel is disposed so that the inclination angle of the display surface with respect to a plane perpendicular to the optical axis of the eyepiece is greater than 90°;
  • the first display panel is disposed so that the inclination angle of the display surface with respect to the optical mirror is less than 45°; the second display panel is disposed so that the inclination angle of the display surface with respect to the optical mirror is less than 45°; the second display panel is disposed so that the inclination angle of the display surface with respect to a plane perpendicular to the optical axis of the eyepiece is greater than 90°;
  • a head-mounted display according to any one of (1) to (7).

Abstract

Est divulgué un visiocasque (1) comprenant : un premier écran d'affichage (10) qui affiche une première image d'affichage (D1) ayant une première résolution ; un second écran d'affichage (20) qui affiche une seconde image d'affichage (D2) ayant une seconde résolution supérieure à la première résolution ; un miroir optique (30) qui transmet au moins une partie de la première lumière d'image émise par le premier écran d'affichage (10), et réfléchit au moins une partie de la seconde lumière d'image émise par le second écran d'affichage (20) ; une lentille oculaire (40) que la première lumière d'image transmise à travers le miroir optique (30) et la seconde lumière d'image réfléchie par le miroir optique (30) sont amenées à entrer, et qui permet à un utilisateur de reconnaître visuellement une image d'affichage (D) qui est basée sur la première image d'affichage (D1) et la seconde image d'affichage (D2) ; et un moyen de régulation d'angle d'émission (50) qui régule l'angle d'émission de la seconde lumière d'image par rapport à une surface d'affichage du second écran d'affichage (20).
PCT/JP2024/017451 2024-05-10 2024-05-10 Visiocasque Pending WO2025234099A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2024/017451 WO2025234099A1 (fr) 2024-05-10 2024-05-10 Visiocasque

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2024/017451 WO2025234099A1 (fr) 2024-05-10 2024-05-10 Visiocasque

Publications (1)

Publication Number Publication Date
WO2025234099A1 true WO2025234099A1 (fr) 2025-11-13

Family

ID=97675185

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2024/017451 Pending WO2025234099A1 (fr) 2024-05-10 2024-05-10 Visiocasque

Country Status (1)

Country Link
WO (1) WO2025234099A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130286326A1 (en) * 2008-06-26 2013-10-31 American Panel Corporation Channelized plate
US20160240013A1 (en) * 2015-02-12 2016-08-18 Google Inc. Combining a high resolution narrow field display and a mid resolution wide field display
JP2018109745A (ja) * 2016-12-01 2018-07-12 ヴァルヨ テクノロジーズ オーユー 表示装置、およびフォーカスディスプレイとコンテキストディスプレイを用いた表示方法
US20190137775A1 (en) * 2016-07-04 2019-05-09 SZ DJI Technology Co., Ltd. Vision system and film viewing device
JP2019095653A (ja) * 2017-11-24 2019-06-20 Ｔｉａｎｍａ Ｊａｐａｎ株式会社 表示装置の製造方法及び表示装置
JP2022081145A (ja) * 2020-11-19 2022-05-31 シャープ株式会社 液晶表示装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130286326A1 (en) * 2008-06-26 2013-10-31 American Panel Corporation Channelized plate
US20160240013A1 (en) * 2015-02-12 2016-08-18 Google Inc. Combining a high resolution narrow field display and a mid resolution wide field display
US20190137775A1 (en) * 2016-07-04 2019-05-09 SZ DJI Technology Co., Ltd. Vision system and film viewing device
JP2018109745A (ja) * 2016-12-01 2018-07-12 ヴァルヨ テクノロジーズ オーユー 表示装置、およびフォーカスディスプレイとコンテキストディスプレイを用いた表示方法
JP2019095653A (ja) * 2017-11-24 2019-06-20 Ｔｉａｎｍａ Ｊａｐａｎ株式会社 表示装置の製造方法及び表示装置
JP2022081145A (ja) * 2020-11-19 2022-05-31 シャープ株式会社 液晶表示装置

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