# US 2025/0085584 A1 · Light adjustment device and vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0085584 A1 - Document ID: US20250085584A1 - Status: Published application - Kind: A1 - Application number: 18/294,344 - Filed: 2022-10-08 - Published: 2025-03-13 - Earliest claimed: 2022-10-08 - Assignees: Beijing BOE Sensor Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Applicants: Beijing BOE Sensor Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Inventors: Peng LIANG; Changyin WANG; Juan CHEN; Xiaolong WU; Sikai ZHANG; Deshen ZHAI; Xiaoqian JU; Ying WANG; Zhan LI; Chunlei WANG; Yuanyang ZHAO - Web page: https://patentgrep.com/patent/US20250085584A1 ## CPC - G02F 1/133512: {Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence)} - B32B 17/06: comprising glass as the main or only constituent of a layer, next to another layer of a specific {material} - B60J 3/007: {Sunglare reduction by coatings, interposed foils in laminar windows, or permanent screens (layered glass products B32B17/00; process of coating windows C03C17/00)} - B60J 3/04: adjustable in transparency - E06B 9/24: Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; {Slat blinds}(operating, guiding or securing devices or arrangements for roll-type closures E06B9/56; free-hanging flexible screens A47H23/00) - E06B 2009/2464: {featuring transparency control by applying voltage, e.g. LCD, electrochromic panels} - G02F 2202/28: Adhesive materials or arrangements - 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 - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - B60J: WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES (fastening, suspending, closing, or opening of such devices E05) - E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00) ## Abstract A light adjustment device includes a first substrate and a second substrate that are arranged opposite to each other, a light adjustment module, and an ultraviolet light blocking layer. The light adjustment module is located between the first substrate and the second substrate. The ultraviolet light blocking layer is located between the first substrate and the light adjustment module or located inside the light adjustment module. A refractive index of the ultraviolet light blocking layer is greater than a refractive index of the first substrate. ## Claims ### Claim 1 A light adjustment device, comprising: a first substrate and a second substrate that are arranged opposite to each other; a light adjustment module located between the first substrate and the second substrate; and an ultraviolet light blocking layer located between the first substrate and the light adjustment module or disposed in the light adjustment module; wherein a refractive index of the ultraviolet light blocking layer is greater than a refractive index of the first substrate. ### Claim 2 (depends on 1) The light adjustment device according to claim 1, wherein the ultraviolet light blocking layer is disposed on a surface of the light adjustment module proximate to the first substrate; the light adjustment device further comprises: a first adhesive layer located between the ultraviolet light blocking layer and the first substrate; wherein a refractive index of the first adhesive layer is greater than the refractive index of the first substrate, and is less than the refractive index of the ultraviolet light blocking layer. ### Claim 3 (depends on 2) The light adjustment device according to claim 2, wherein the refractive index of the first substrate is in a range of 1.3 to 1.5; and/or the refractive index of the first adhesive layer is in a range of 1.4 to 1.5; and/or the refractive index of the ultraviolet light blocking layer is in a range of 1.4 to 1.6. ### Claim 4 (depends on 2) The light adjustment device according to claim 2, wherein the light adjustment module includes a first base material layer and a second base material layer that are arranged opposite to each other; the first base material layer is closer to the first substrate than the second base material layer; the ultraviolet light blocking layer is disposed on a surface of the first base material layer away from the second base material layer; a thermal expansion coefficient of the ultraviolet light blocking layer is approximately the same as a thermal expansion coefficient of the first base material layer; and/or a heat shrinkage of the ultraviolet light blocking layer is approximately the same as a heat shrinkage of the first base material layer. ### Claim 5 (depends on 4) The light adjustment device according to claim 4, wherein the thermal expansion coefficient of the ultraviolet light blocking layer is less than or equal to 50 ppm/K; and/or the heat shrinkage of the ultraviolet light blocking layer is less than or equal to 0.1%. ### Claim 6 (depends on 1) The light adjustment device according to claim 1, wherein the ultraviolet light blocking layer is disposed on a surface of the first substrate proximate to the light adjustment module; the light adjustment device further comprises: a first adhesive layer located between the ultraviolet light blocking layer and the light adjustment module; wherein a refractive index of the first adhesive layer is greater than the refractive index of the ultraviolet light blocking layer. ### Claim 7 (depends on 6) The light adjustment device according to claim 6, wherein the refractive index of the first substrate is in a range of 1.3 to 1.5; and/or the refractive index of the ultraviolet light blocking layer is in a range of 1.4 to 1.5; and/or the refractive index of the first adhesive layer is in a range of 1.4 to 1.6. ### Claim 8 (depends on 1) The light adjustment device according to claim 1, wherein an orthographic projection of the ultraviolet light blocking layer on a reference plane approximately coincides with an orthographic projection of the light adjustment module on the reference plane, and the reference plane is approximately parallel to a surface of the first substrate away from the light adjustment module. ### Claim 9 (depends on 1) The light adjustment device according to claim 1, further comprising: a first light-shielding layer disposed on a surface of the first substrate away from the light adjustment module or a surface of the first substrate proximate to the light adjustment module and arranged along an edge of the first substrate; wherein a boundary of an orthographic projection of the ultraviolet light blocking layer on a reference plane approximately coincides with an inner boundary of an orthographic projection of the first light-shielding layer on the reference plane, and the reference plane is approximately parallel to the surface of the first substrate away from the light adjustment module. ### Claim 10 (depends on 8) The light adjustment device according to claim 8, further comprising: a sealant located between the first substrate and the second substrate and surrounding the light adjustment module, the first adhesive layer and the ultraviolet light blocking layer. ### Claim 11 (depends on 6) The light adjustment device according to claim 6, an orthographic projection of the ultraviolet light blocking layer on a reference plane approximately coincides with an orthographic projection of the first substrate on the reference plane, and the reference plane is approximately parallel to a surface of the first substrate away from the light adjustment module. ### Claim 12 (depends on 11) The light adjustment device according to claim 11, further comprising: a sealant located between the ultraviolet light blocking layer and the second substrate and surrounding the light adjustment module and the first adhesive layer. ### Claim 13 (depends on 1) The light adjustment device according to claim 1, wherein the light adjustment module includes a first base material layer, a first electrode layer, a light adjustment layer, a second electrode layer and a second base material layer that are sequentially stacked; the first base material layer is closer to the first substrate than the second base material layer; the ultraviolet light blocking layer is located between the first base material layer and the first electrode layer; and a material of the ultraviolet light blocking layer includes cerium dioxide and titanium dioxide; or a material of the ultraviolet light blocking layer includes an ultraviolet blocking optical adhesive; and/or the material of the ultraviolet light blocking layer includes cerium dioxide and titanium dioxide. ### Claim 14 (canceled) ### Claim 15 (depends on 13) The light adjustment device according to claim 13, wherein in a case where the material of the ultraviolet light blocking layer includes the ultraviolet blocking optical adhesive, a thickness of the ultraviolet light blocking layer is in a range of 50 μm to 200 μm; and in a case where the material of the ultraviolet light blocking layer includes cerium dioxide and titanium dioxide, the thickness of the ultraviolet light blocking layer is in a range of 400 nm to 600 nm. ### Claim 16 (depends on 1) The light adjustment device according to claim 1, wherein the light adjustment device comprises a first adhesive layer and a second adhesive layer; the first adhesive layer is disposed between the light adjustment module and the first substrate; and the second adhesive layer is disposed between the light adjustment module and the second substrate; wherein a material of the first adhesive layer includes a polyvinyl butyral (PVB) adhesive or a transparent optical adhesive; and/or a material of the second adhesive layer includes a PVB adhesive or a transparent optical adhesive. ### Claim 17 (depends on 16) The light adjustment device according to claim 16, wherein the material of the first adhesive layer includes the PVB adhesive, an orthographic projection of the first adhesive layer on a reference plane approximately coincides with an orthographic projection of the light adjustment module on the reference plane, and the reference plane is approximately parallel to a surface of the first substrate away from the light adjustment module; the light adjustment device further comprises a sealant, and the sealant surrounds the light adjustment module and the first adhesive layer, and is connected to a circumferential sidewall of the light adjustment module and a circumferential sidewall of the first adhesive layer. ### Claim 18 (depends on 16) The light adjustment device according to claim 16, wherein the material of the first adhesive layer includes the transparent optical adhesive; an orthographic projection of the first adhesive layer on a reference plane is located within an orthographic projection of the light adjustment module on the reference plane, and has a distance from a boundary of the orthographic projection of the light adjustment module on the reference plane; the reference plane is approximately parallel to a surface of the first substrate away from the light adjustment module; the light adjustment device further comprises a first frame sealing adhesive disposed around the first adhesive layer and bonded to a circumferential sidewall of the first adhesive layer; the light adjustment device further comprises a sealant, and the sealant surrounds the light adjustment module and the first frame sealing adhesive, and is connected to a circumferential sidewall of the light adjustment module and a surface of the first frame sealing adhesive away from the first adhesive layer. ### Claim 19 (depends on 16) The light adjustment device according to claim 16, wherein the material of the second adhesive layer includes the PVB adhesive, an orthographic projection of the second adhesive layer on a reference plane approximately coincides with an orthographic projection of the light adjustment module on the reference plane, and the reference plane is approximately parallel to a surface of the first substrate away from the light adjustment module; the light adjustment device further comprises a sealant, and the sealant surrounds the light adjustment module and the second adhesive layer, and is connected to a circumferential sidewall of the light adjustment module and a circumferential sidewall of the second adhesive layer. ### Claim 20 (depends on 16) The light adjustment device according to claim 16, wherein the material of the second adhesive layer includes the transparent optical adhesive; an orthographic projection of the second adhesive layer on a reference surface is located within an orthographic projection of the light adjustment module on the reference plane, and has a distance from a boundary of the orthographic projection of the light adjustment module on the reference plane; the reference plane is approximately parallel to a surface of the first substrate away from the light adjustment module; the light adjustment device further comprises a second frame sealing adhesive disposed around the second adhesive layer and bonded to a circumferential sidewall of the second adhesive layer; the light adjustment device further comprises a sealant, and the sealant surrounds the light adjustment module and the second frame sealing adhesive, and is connected to a circumferential sidewall of the light adjustment module and a surface of the second frame sealing adhesive away from the second adhesive layer. ### Claim 21 (depends on 1) A vehicle, comprising a vehicle body and a vehicle window glass mounted on the vehicle body, the vehicle window glass including the light adjustment device according to claim 1, wherein the first substrate is closer to an outside of the vehicle than the second substrate.