# US 12,007,643 B2 · Optical path control member and display device comprising same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,007,643 B2 - Document ID: US12007643B2 - Status: Granted - Kind: B2 - Application number: 18/007,394 - Filed: 2021-07-08 - Published: 2023-09-07 - Granted: 2024-06-11 - Earliest claimed: 2020-07-28 - Assignees: LG Innotek Co., Ltd. - Applicants: LG Innotek Co., Ltd. - Inventors: Won Seok Choi; Jin Gyeong Park; Byung Sook Kim - Web page: https://patentgrep.com/patent/US12007643B2 ## CPC - G02F 1/1323: {Arrangements for providing a switchable viewing angle} - G02B 5/20: Filters (polarising elements G02B5/30) - G02B 26/08: for controlling the direction of light (in light guides G02B6/35) - G02F 1/13338: {Input devices, e.g. touch panels} - G02F 1/133524: {Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides} - G02F 1/133608: {including particular frames or supporting means} - G02F 1/1339: Gaskets; Spacers; Sealing of cells - G02F 1/13439: {characterised by their electrical, optical, physical properties; materials therefor; method of making} - G02F 1/167: by electrophoresis - G02F 1/1675: Constructional details - H10K 59/873: {Encapsulations} - G02F 1/1679: Gaskets; Spacers; Sealing of cells; Filling or closing of cells - G02F 2202/28: Adhesive materials or arrangements - H10K 59/8722: {Peripheral sealing arrangements, e.g. adhesives, sealants} - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract An optical path control member according to an embodiment comprises: a first substrate on which a first direction and a second direction are defined; a first electrode arranged on the first substrate; a second substrate which is arranged on the first substrate and on which the first direction and the second direction are defined; a second electrode arranged under the second substrate; and a light conversion unit arranged between the first electrode and the second electrode, wherein the light conversion unit comprises an alternately arranged plurality of partition parts and plurality of accommodation parts, a light conversion material is arranged in the accommodation part, the accommodation part comprises at least one first region and at least one second region, and the height of the light conversion material arranged in the first region is less than the height of the light conversion material arranged in the second region. ## Claims ### Claim 1 An optical path control member comprising: a first substrate on which a first direction and a second direction are defined; a first electrode disposed on the first substrate; a second substrate disposed on the first substrate, and on which the first direction and the second direction are defined; a second electrode disposed under the second substrate; and a light conversion unit disposed between the first electrode and the second electrode, wherein the second substrate includes a first hole, a second hole, a third hole, and a fourth hole, and wherein sealing parts are disposed inside the first hole, the second hole, the third hole, and the fourth hole. ### Claim 2 (depends on 1) The optical path control member of claim 1, wherein the light conversion unit includes a plurality of partition wall parts spaced apart from each other in the first direction and a plurality of accommodation parts alternately disposed, wherein a light conversion material is disposed in each accommodation part, and wherein the light conversion material has different heights along the second direction. ### Claim 3 (depends on 2) The optical path control member of claim 2, wherein each accommodation part includes at least one first region and at least one second region along the second direction, wherein a height of the light conversion material disposed in the first region is smaller than that of the light conversion material disposed in the second region, wherein the sealing parts include a first sealing part disposed in the first hole and the second hole, wherein one end and an other end of the accommodation part are disposed to face the first sealing part, and wherein the first region is disposed closer to the first sealing part than is the second region. ### Claim 4 (depends on 3) The optical path control member of claim 3, wherein a height of the light conversion material disposed in the first region is 10% to 99.9% of a height of the light conversion material disposed in the second region. ### Claim 5 (depends on 3) The optical path control member of claim 3, comprising an adhesive layer disposed between the first electrode and the light conversion unit, and a thickness of an adhesive layer in the first region is greater than that of an adhesive layer in the second region. ### Claim 6 (depends on 3) The optical path control member of claim 3, comprising a buffer layer disposed between the second electrode and the light conversion unit, wherein the light conversion unit includes a base part between the buffer layer and the accommodation part, and a thickness of a base part of the first region is greater than that of a base part of the second region. ### Claim 7 (depends on 3) The optical path control member of claim 3, wherein the first sealing part is in contact with the light conversion material. ### Claim 8 (depends on 3) The optical path control member of claim 3, wherein the first region is disposed between the second region and the first sealing part. ### Claim 9 (depends on 3) The optical path control member of claim 3, wherein a width of the first region is 0.1% to 20% of a total width of the accommodation part in the second direction. ### Claim 10 (depends on 9) The optical path control member of claim 9, wherein the width of the first region is 0.001 mm to 20 mm. ### Claim 11 (depends on 1) A display device comprising: a panel including at least one of a display panel and a touch panel; and the optical path control member of claim 1, which is disposed on or under the panel. ### Claim 12 (depends on 11) The display device of claim 11, wherein the panel includes a backlight unit and a liquid crystal display panel, the optical path control member is disposed between the backlight unit and the liquid crystal display panel, and light emitted from the backlight unit moves in a direction of the second substrate from the first substrate. ### Claim 13 (depends on 11) The display device of claim 11 wherein the panel includes an organic light emitting diode panel, the optical path control member is disposed on the organic light emitting diode panel, and light emitted from the panel moves in a direction of the second substrate from the first substrate. ### Claim 14 (depends on 13) The optical path control member of claim 13, wherein an open region is formed between the second hole and the fourth hole. ### Claim 15 (depends on 14) The optical path control member of claim 14, configured so that a current and a voltage can be transferred toward the accommodation part through the second electrode by the open region. ### Claim 16 (depends on 1) The optical path control member of claim 1, wherein a first sealing part is disposed in the first hole, a second sealing part is disposed in the second hole, and at least one of the first sealing part and the second sealing part is an outermost surface of the optical path control member.