# US 11,999,288 B2 · Light guide and illuminable screen > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,999,288 B2 - Document ID: US11999288B2 - Status: Granted - Kind: B2 - Application number: 18/227,774 - Filed: 2023-07-28 - Published: 2024-02-01 - Granted: 2024-06-04 - Earliest claimed: 2022-08-01 - Assignees: Dr. Ing. h. c. F. Porsche AG - Applicants: Dr. Ing. h.c. F. Porsche Aktiengesellschaft - Inventors: Benjamin Rehfuss; Max Nitsch - Web page: https://patentgrep.com/patent/US11999288B2 ## CPC - B60Q 3/233: Seats; Arm rests; Head rests - G02B 6/0091: {of the light source relative to the light guide (G02B6/0021 takes precedence)} - B60N 2/643: {shape of the back-rests (B60N2/66 takes precedence)} - B60Q 3/50: Mounting arrangements (for compartments other than passenger or driving compartments B60Q3/30; specially adapted for specific vehicle types B60Q3/40) - B60Q 3/62: using light guides - B60Q 3/64: for a single lighting device - G02B 6/0028: {Light guide, e.g. taper} - B60Q: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - B60N: SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR ## Abstract A light guide (1) is provided for an illuminable screen (2) of a motor vehicle seat (3). The light guide (7) has a pin-shaped light-introducing region (4) and a plate-shaped light-emitting region (5). The pin-shaped light-introducing region (4) transitions into the plate-shaped light-emitting region (5) over an arch region (6) expanding from the pin-shaped light-introducing region (4) to achieve a compact design. ## Claims ### Claim 1 A light guide (1) for an illuminable screen (2) of a motor vehicle seat (3), the light guide (1) comprising: a pin-shaped light-introducing region (4) extending in a z-direction; an arch region (6) extending from the pin-shaped light-introducing region (4), the arch region (6) expanding in a y-direction transverse to the z-direction and curving back toward the pin-shaped light-introducing region (4); a plate-shaped light-emitting region (5) extending from the arch region (6) and disposed forward of the pin-shaped light-introducing region (4) in an x-direction that is transverse to the z-direction and the y-direction so that the plate-shaped light-emitting region (5), the arch region (6) and the pin-shaped light-introducing region (4) define a substantially U-shape, with a surface of the plate-shaped light-emitting region (5) that faces forward in the x-direction and away from the a pin-shaped light-introducing region (4) defines the illuminable screen (2). ### Claim 2 (depends on 1) The light guide of claim 1, further comprising a free edge (15) at an end of the plate-shaped light-emitting region (5) opposite the arch region (6), a surface of the light guide extending from the free edge (15) back toward the arch region (6) defining the light-emitting region (5), the free edge (15) having opposite corners (17) spaced apart in the y-direction and a wedge-shaped recess (16) between the opposite corners (17). ### Claim 3 (depends on 2) The light guide of claim 2, wherein the plate-shaped light-emitting region (5) comprises dopings (14) that cause a light diversion orthogonally to the plate-shaped light-emitting region (5). ### Claim 4 (depends on 3) The light guide of claim 3, wherein a number of the dopings (14) in the plate-shaped light-emitting region (5) increases towards the wedge-shaped recess (16). ### Claim 5 (depends on 2) The light guide of claim 2, wherein a surface of the arch region (6) facing oppositely from the pin-shaped light-introducing region (4) and the free edge (15) comprises a recess (19). ### Claim 6 (depends on 1) An illuminable screen (2) for a motor vehicle seat (3) comprising the light guide (1) of claim 1. ### Claim 7 (depends on 6) The illuminable screen of claim 6, wherein the illuminable screen (2) comprises a front part (12) and a carrier part (21) that can be clipped to the front part (12) via clip connections (20), the carrier part (21) having a recess (22) surrounded by an at least partially circumferential edge (23), the recess (22), the edge (23) and the front part (12) defining a receiving space in which the plate-shaped light-emitting region (5) is received in an at least partial positive lock, and an LED module (8) connected to the light guide (1) via a clip connection (10), the guide pin (7) of the light guide (1) cooperating with an associated guide contour (9) on the LED module (8), thereby forcing a predefined relative position between the light guide (1) and the LED module (8). ### Claim 8 A light guide for an illuminable screen (2) of a motor vehicle seat (3), comprising: a pin-shaped light-introducing region (4); an arch region (6) expanding from the pin-shaped light-introducing region (4); a plate-shaped light-emitting region (5) extending from the arch region (6) so that the pin-shaped light-introducing region (4) transitions into the plate-shaped light-emitting region (5) over the arch region (6), and a guide pin (7) arranged on the pin-shaped light-introducing region (4). ### Claim 9 A motor vehicle seat (3) comprising: a backrest (25) with a forwardly facing surface; and a U-shaped curved light guide (1) having a light-introducing region (4) at a position rearward of the backrest; an arch region (6) extending from the light-introducing region (4) and curving forward over a top of the backrest (25); and a plate-shaped light-emitting region (5) extending from the arch region (6) and disposed adjacent a front surface of the backrest (25), the plate-shaped light-emitting region (5) having an illuminable screen (2) facing forward and away from the backrest (25). ### Claim 10 (depends on 9) The motor vehicle seat of claim 9, wherein the light-introducing region (4) of the light guide (1) is pin-shaped, and a guide pin (7) is arranged on the pin-shaped light-introducing region (4). ### Claim 11 (depends on 9) The motor vehicle seat of claim 9, further comprising a free edge (15) at an end of the plate-shaped light-emitting region (5) opposite the arch region (6), the free edge (15) having opposite corners (17) spaced apart in the y-direction and a wedge-shaped recess (16) between the opposite corners (17). ### Claim 12 (depends on 9) The motor vehicle seat of claim 9, wherein a surface of the arch region (6) facing oppositely from the light-introducing region (4) and the plate-shaped light-emitting region (5) comprises a recess (19).