# US 11,441,750 B2 · Lighting tool for vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,441,750 B2 - Document ID: US11441750B2 - Status: Granted - Kind: B2 - Application number: 17/372,196 - Filed: 2021-07-09 - Published: 2022-01-20 - Granted: 2022-09-13 - Earliest claimed: 2020-07-20 - Assignees: Stanley Electric Co., Ltd. - Applicants: Stanley Electric Co., Ltd. - Inventors: Yuki Sugihara; Shota Nishimura; Shinya Hoshino - Web page: https://patentgrep.com/patent/US11441750B2 ## CPC - F21S 41/143: the main emission direction of the LED being parallel to the optical axis of the illuminating device - F21S 41/25: Projection lenses - F21S 41/151: arranged in one or more lines - F21S 41/24: Light guides - F21S 41/265: Composite lenses; Lenses with a patch-like shape - F21S 41/43: characterised by the shape thereof - F21S 41/663: by switching light sources (by switching incandescent light sources F21S41/162) - F21V 5/04: of lens shape - F21W 2102/13: for high-beam region or low-beam region - F21Y 2115/10: Light-emitting diodes [LED] - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED ## Abstract A projection lens has a first lens body including a first incidence section disposed at a side facing a first light source and a first emitting section disposed at a side opposite to the first incidence section, and a second lens body including a second incidence section disposed at a side facing a second light source and a second emitting section disposed at a side opposite to the second incidence section, a structure in which the first lens body and the second lens body abut against each other via an intermediate layer which is interposed between facing boundary surfaces of the first lens body and the second lens body is provided, and a refractive index of the intermediate layer is smaller than a refractive index of the first lens body. ## Claims ### Claim 1 A lighting tool for a vehicle comprising: a first light source configured to emit first light; a second light source that is disposed adjacent to the first light source and that is configured to emit second light in a same direction as the first light; and a projection lens configured to project the first light and the second light in a same direction, wherein the projection lens has a first lens body including a first incidence section disposed at a side facing the first light source and a first emitting section disposed at a side opposite to the first incidence section, and a second lens body including a second incidence section disposed at a side facing the second light source and a second emitting section disposed at a side opposite to the second incidence section, a refractive index of the second lens body is smaller than a refractive index of the first lend body, a structure in which the first lens body and the second lens body are joined to each other via an intermediate layer which is interposed between facing boundary surfaces of the first lens body and the second lens body, and the intermediate layer is a binding material with optical transparency, a refractive index of the intermediate layer is smaller than the refractive index of the first lens body, the refractive index of the second lens body is equal to or smaller than the refractive index of the intermediate layer, among the first light that has entered inside of the first lens body from the first incidence section, the first light reflected at the boundary surface is emitted from the first emitting section to an outside of the first lens body, and among the second light that has entered inside of the second lens body from the second incidence section, the second light that has passed through the boundary surface is emitted from the first emitting section to the outside of the first lens body. ### Claim 2 (depends on 1) The lighting tool for a vehicle according to claim 1, wherein the first lens body is a polycarbonate resin, and the second lens body is an acryl resin (PMMA). ### Claim 3 (depends on 1) The lighting tool for a vehicle according to claim 1, wherein the projection lens has a third lens body that is disposed at a side facing the first emitting section and the second emitting section, and the third lens body has a lens surface configured to condense the first light and the second light emitted from the first emitting section and the second emitting section in a direction in which the first light source and the second light source are aligned. ### Claim 4 (depends on 3) The lighting tool for a vehicle according to claim 3, wherein the third lens body is disposed in a state in which an air layer is provided between the first emitting section and the second emitting section. ### Claim 5 (depends on 1) The lighting tool for a vehicle according to claim 1, wherein the first light source and the second light source are provided on a same surface of a same substrate. ### Claim 6 (depends on 1) The lighting tool for a vehicle according to claim 1, wherein the first light projected by the projection lens forms a first light distribution pattern including a cutoff line defined by a tip of the boundary surface on an upper end thereof, and the second light projected by the projection lens forms a second light distribution pattern disposed above the first light distribution pattern.