# US 12,000,563 B2 · Lighting system and artificial window > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,000,563 B2 - Document ID: US12000563B2 - Status: Granted - Kind: B2 - Application number: 17/641,711 - Filed: 2020-09-10 - Published: 2022-10-27 - Granted: 2024-06-04 - Earliest claimed: 2019-09-17 - Assignees: Signify Holding B.V. - Applicants: Signify Holding B.V. - Inventors: Martinus Hermanus Wilhelmus Maria Van Delden - Web page: https://patentgrep.com/patent/US12000563B2 ## CPC - F21S 8/024: {intended to be recessed in a wall or like vertical structure, e.g. building facade} - F21V 9/02: for simulating daylight (F21V9/04, F21V9/06 take precedence) - F21S 8/04: intended only for mounting on a ceiling or the like overhead structures (F21S8/02 takes precedence; {details of ceiling bases F21V21/03}) - F21V 5/045: {the lens having discontinuous faces, e.g. Fresnel lenses} - F21V 21/041: {Mounting arrangements specially adapted for false ceiling panels or partition walls made of plates (F21V21/047 takes precedence)} - H05B 45/28: using temperature feedback - F21Y 2105/16: square or rectangular, e.g. for light panels - 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 - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - 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 The invention relates to a lighting system comprising a light area and a side wall around the light area defining a recess. The light area is located at a base of the recess and a light exit window is located downstream at a top of the recess opposite the light area. The side wall comprises a first wall portion and a second wall portion located upstream of the first wall portion. A clear, transparent pane is provided in between the first and second wall portion, wherein (essentially the whole of) the second wall portion is screened by the first wall portion from a direct line of view through the light exit window. ## Claims ### Claim 1 A lighting system comprising: a light area extending transverse to a main, axial direction, and a side wall extending downstream from the light area, defining a recess with a cross section (Ra), wherein the light area is located at a base of the recess and a light exit window is located downstream at a top of the recess opposite the light area, wherein the side wall comprises a first wall portion and a second wall portion located upstream of the first wall portion, and wherein a transparent pane is provided in between the first and second wall portion, and wherein essentially the whole second wall portion is screened by the first wall portion from all direct lines of view through the light exit window. ### Claim 2 (depends on 1) The lighting system according to claim 1, wherein the light area is formed by a LED panel having a diffuse surface. ### Claim 3 (depends on 1) The lighting system according to claim 1, wherein the transparent pane is specular Fresnel reflective. ### Claim 4 (depends on 1) The lighting system according to claim 1, wherein the first wall portion is capable of emitting light. ### Claim 5 (depends on 1) The lighting system according to claim 1, wherein the sidewall, the first and second wall portion thereof are circumferential around the recess and wherein the first wall portion is provided with a lighting arrangement for controlling at least one of color, intensity, contrast of the illumination, and shape from which light is provided by the first wall portion. ### Claim 6 (depends on 1) The lighting system according to claim 1, wherein the first wall portion having a height H1 comprises a transverse wall portion extending at the transparent pane in a radial direction over a width Wt into the recess having a width Wr for screening the second wall portion having a height H2 from said direct line of view, wherein H2<=H1*Wt/(Wr−Wt). ### Claim 7 (depends on 1) The lighting system according to claim 1, wherein the first wall portion having a height H1 is offset from the second wall portion by a distance D in a radial direction into the recess having a width Wr for screening the second wall portion with a height H2 from said direct line of view, wherein H2<=H1*D/(Wr−2*D). ### Claim 8 (depends on 1) The lighting system according to claim 1, wherein the light area and the transparent pane are spaced apart by a distance in the range of 0.1-7.5 cm. ### Claim 9 (depends on 1) The lighting system according to claim 1, wherein the transparent pane extends over the full cross sectional area Ra of the recess at the first wall portion. ### Claim 10 (depends on 1) The lighting system according to claim 1, wherein the transparent pane is made of clear, colorless glass, PMMA or PC. ### Claim 11 (depends on 1) The lighting system according to claim 1, wherein the second wall portion has a white colored, diffuse reflective surface facing the recess. ### Claim 12 (depends on 1) The lighting system according to claim 1, wherein the first wall portion has a white colored, diffuse reflective surface facing the recess. ### Claim 13 (depends on 1) The lighting system according to claim 1, wherein the light area emits light with a color temperature or color correlated color temperature in the range of 6500-20000K. ### Claim 14 (depends on 1) The lighting system according to claim 1, wherein the first wall portion emits light with a color temperature or color correlated color temperature in the range of 3500-6000K. ### Claim 15 (depends on 1) An artificial window or a recessed wall arrangement, wherein the artificial window or the recessed wall arrangement comprises the lighting system according to claim 1.