# US 12,761,470 B2 · Display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,761,470 B2 - Document ID: US12761470B2 - Status: Granted - Kind: B2 - Application number: 18/294,181 - Filed: 2022-02-09 - Published: 2024-10-10 - Granted: 2026-10-13 - Earliest claimed: 2021-08-24 - Assignees: Sony Semiconductor Solutions Corporation - Applicants: Sony Semiconductor Solutions Corporation - Inventors: Kazuma Aiki; Satoshi Imai; Hiroshi Mukawa - Web page: https://patentgrep.com/patent/US12761470B2 ## CPC - G02B 27/0018: {with means for preventing ghost images (anti-reflection coatings G02B1/11)} - G02B 6/4214: {the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device (G02B6/4246 takes precedence)} - G02B 27/0172: {characterised by optical features} - G02B 2027/012: {comprising devices for attenuating parasitic image effects} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract Provided is a display apparatus that includes an image light generation apparatus that generates image light and a light guide plate that guides the image light from the image light generation apparatus to an eyeball. The light guide plate includes a light guide plate main body including a light incident surface upon which the image light enters, and an optical surface group including a plurality of optical surfaces that guides the image light via the light incident surface. The light guide plate includes at least one reflection surface that is provided inside the light guide plate main body and reflects the image light via the optical surface group to a side of the eyeball, and at least one light-shielding portion that is provided in the light guide plate main body and shields a stray light component of the image light. ## Claims ### Claim 1 A display apparatus, comprising: an image light generation apparatus configured to generate image light; and a light guide plate configured to guide the image light from the image light generation apparatus to an eyeball, wherein the light guide plate includes: a light guide plate main body including: a light incident surface, wherein the image light enters the light guide plate main body via the light incident surface, and an optical surface group including a plurality of optical surfaces, wherein the plurality of optical surfaces is configured to guide the image light via the light incident surface; at least one reflection surface inside the light guide plate main body, wherein the at least one reflection surface is configured to reflect the image light via the optical surface group to a side of the eyeball; and at least one light-shielding portion inside the light guide plate main body, wherein the at least one light-shielding portion is configured to shield a stray light component of the image light, and the plurality of optical surfaces includes: a first optical surface configured to totally internally reflect the image light via the light incident surface, and a second optical surface that faces the light incident surface, wherein the second optical surface is configured to bend the image light totally internally reflected on the first optical surface toward the at least one reflection surface. ### Claim 2 (depends on 1) The display apparatus according to claim 1, wherein the at least one light-shielding portion is between a virtual surface and the light incident surface, and the virtual surface includes the at least one reflection surface. ### Claim 3 (depends on 1) The display apparatus according to claim 1, wherein the stray light component of the image light excludes light of the image light guided to the at least one reflection surface via the light incident surface and the optical surface group. ### Claim 4 (depends on 1) The display apparatus according to claim 1, wherein the at least one light-shielding portion is at a position deviated from an optical path of the image light between the light incident surface and the optical surface group. ### Claim 5 (depends on 1) The display apparatus according to claim 1, wherein at least a portion of the at least one light-shielding portion is between the light incident surface and the at least one reflection surface. ### Claim 6 (depends on 1) The display apparatus according to claim 1, wherein the at least one light-shielding portion is at least on a back side of the at least one reflection surface. ### Claim 7 (depends on 1) The display apparatus according to claim 1, wherein the stray light component of the image light excludes light of the image light that enters the first optical surface via the light incident surface within a specific angle-of-incidence range, and the specific angle-of-incidence range satisfies a total internal reflection condition. ### Claim 8 (depends on 1) The display apparatus according to claim 1, wherein the at least one light-shielding portion is at a position deviated from an optical path of the image light between the light incident surface and the first optical surface. ### Claim 9 (depends on 1) The display apparatus according to claim 1, wherein the light guide plate further includes a plurality of reflection surfaces, the plurality of reflection surfaces includes the at least one reflection surface, the plurality of reflection surfaces is between the light incident surface and the second optical surface in a specific direction, in the specific direction, the light incident surface faces the second optical surface, the at least one light-shielding portion is between a virtual surface and the light incident surface, and the virtual surface includes a reflection surface closest to the light incident surface among the plurality of reflection surfaces. ### Claim 10 (depends on 1) The display apparatus according to claim 1, wherein the light guide plate main body further includes a light emission surface that faces the first optical surface, the light emission surface is configured to emit the image light via the at least one reflection surface toward the eyeball, and the at least one light-shielding portion is at a position closer to the light emission surface than the first optical surface. ### Claim 11 (depends on 1) The display apparatus according to claim 1, wherein the light guide plate main body further includes a plurality of joined members, the plurality of joined members includes a first member and a second member, and the at least one reflection surface and the at least one light-shielding portion are in a joining portion of each of the first member and the second member. ### Claim 12 (depends on 11) The display apparatus according to claim 11, wherein the second member includes the light incident surface, the first optical surface, and the second optical surface, in the joining portion, a joining surface of the first member is joined to a joining surface of the second member via the at least one light-shielding portion, and each of the joining surface of the first member and the joining surface of the second member faces the light incident surface. ### Claim 13 (depends on 11) The display apparatus according to claim 11, wherein the plurality of joined members further includes a third member, the third member is joined to the second member, the third member has the second optical surface, the second member includes the light incident surface and the first optical surface, in the joining portion, a joining surface of the first member is joined to a joining surface of the second member via the at least one light-shielding portion, and each of the joining surface of the first member and the joining surface of the second member faces the light incident surface. ### Claim 14 (depends on 1) The display apparatus according to claim 1, wherein the light guide plate main body further includes a plurality of joined members, the plurality of joined members includes a first member and a second member, the at least one reflection surface is in a first joining portion of each of the first member and the second member, at least a portion of the at least one light-shielding portion is in a second joining portion of each of the first member and the second member, and the second joining portion is between the light incident surface and the first joining portion. ### Claim 15 (depends on 1) The display apparatus according to claim 1, wherein the light guide plate main body further includes a plurality of joined members, the plurality of joined members includes a first member and a second member, the at least one reflection surface is in a first joining portion of each of the first member and the second member, at least a portion of the at least one light-shielding portion is between the first joining portion and a second joining portion of each of the first member and the second member, and the second joining portion is between the light incident surface and the first joining portion. ### Claim 16 (depends on 1) The display apparatus according to claim 1, wherein the second optical surface is a concave mirror. ### Claim 17 (depends on 1) The display apparatus according to claim 1, wherein the at least one reflection surface is a plane surface. ### Claim 18 (depends on 1) The display apparatus according to claim 1, wherein a portion of the stray light component enters the at least one light-shielding portion, and the at least one light-shielding portion is further configured to absorb the entered portion of the stray light component. ### Claim 19 (depends on 1) The display apparatus according to claim 1, wherein the at least one light-shielding portion includes paint. ### Claim 20 (depends on 1) The display apparatus according to claim 1, wherein the at least one light-shielding portion includes a metal thin film. ### Claim 21 (depends on 1) The display apparatus according to claim 1, wherein the at least one light-shielding portion includes a light-shielding film. ### Claim 22 (depends on 21) The display apparatus according to claim 21, further comprising an adhesive layer, wherein the light guide plate further includes an incident lens, the incident lens is joined to the light incident surface, the incident lens is configured to allow the image light to enter the light guide plate main body, the light-shielding film is in a first portion between the light incident surface and the incident lens, and the adhesive layer is in a second portion between the light incident surface and the incident lens. ### Claim 23 (depends on 21) The display apparatus according to claim 21, further comprising an adhesive layer, wherein the light guide plate further includes an incident lens, the incident lens is joined to the light incident surface, the incident lens is configured to allow the image light to enter the light guide plate main body, one of a first portion of a surface of the incident lens or a first portion of the light incident surface includes a recess, the surface of the incident lens is on a side of the light incident surface, the light-shielding film is in the recess, the adhesive layer is between the light-shielding film and a surface in a periphery of the recess, the recess is absent on each of a second portion of the surface of the incident lens and a second portion of the light incident surface, and the adhesive layer is further between the second portion of the surface of the incident lens and the second portion of the light incident surface. ### Claim 24 (depends on 21) The display apparatus according to claim 21, further comprising a light-transmitting film and an adhesive layer, wherein the light guide plate further includes an incident lens, the incident lens is joined to the light incident surface, the incident lens is configured to allow the image light to enter the light guide plate main body, the light-shielding film is in a first portion between the light incident surface and the incident lens, the light-transmitting film is in a second portion between the light incident surface and the incident lens, and the adhesive layer is between at least one of the light incident surface and each of the light-shielding film and the light-transmitting film, or the incident lens and each of the light-shielding film and the light-transmitting film. ### Claim 25 (depends on 1) The display apparatus according to claim 1, wherein the at least one light-shielding portion is on the light incident surface. ### Claim 26 A display apparatus, comprising: an image light generation apparatus configured to generate image light; a light guide plate configured to guide the image light from the image light generation apparatus to an eyeball, wherein the light guide plate includes: a light guide plate main body including: a light incident surface, wherein the image light enters the light guide plate main body via the light incident surface, and an optical surface group including a plurality of optical surfaces, wherein the plurality of optical surfaces is configured to guide the image light via the light incident surface; at least one reflection surface inside the light guide plate main body, wherein the at least one reflection surface is configured to reflect the image light via the optical surface group to a side of the eyeball; at least one light-shielding portion in the light guide plate main body, wherein the at least one light-shielding portion is configured to shield a stray light component of the image light; and an incident lens joined to the light incident surface, the incident lens is configured to allow the image light to enter the light guide plate main body, the at least one light-shielding portion includes a light-shielding film, and the light-shielding film is in a first portion between the light incident surface and the incident lens; and an adhesive layer in a second portion between the light incident surface and the incident lens.