# US 7,744,253 B2 · Built-in light > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,744,253 B2 - Document ID: US7744253B2 - Status: Granted - Kind: B2 - Application number: 10/541,444 - Filed: 2004-11-24 - Published: 2006-11-02 - Granted: 2010-06-29 - Earliest claimed: 2003-12-23 - Assignees: Hartmut S. Engel - Inventors: Hartmut S. Engel - Web page: https://patentgrep.com/patent/US7744253B2 ## CPC - F21V 14/04: by movement of reflectors {(in vehicle head lamps F21S41/675)} - F21S 8/02: of recess-mounted type, e.g. downlighters (specially adapted for vehicle exteriors F21S41/00-F21S45/00) - F21S 8/026: {intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling} - F21V 3/00: Globes; Bowls; Cover glasses (with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506) - F21V 7/0016: {on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes} - F21V 7/0025: {Combination of two or more reflectors for a single light source (array of reflectors for a cluster of light sources F21V7/0083)} - F21V 11/14: with many small apertures - F21V 14/02: by movement of light sources {(in vehicle head lamps F21S41/657)} - F21V 21/30: Pivoted housings or frames - F21Y 2103/37: U-shaped - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - 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 built-in lamp comprising a holder for fastening in an installation surface, in particular in a room ceiling, a bulb and a reflector, with a reflector opening disposed in the direction of illumination defining a direct light discharge region and with the direct light discharge region being surrounded by a diffuse light discharge region. ## Claims ### Claim 1 A built-in lamp comprising a holder for fastening in an installation surface (11), a bulb (6) and a direct light reflector, with a reflector opening disposed in the direction of illumination defining a generally planar direct light discharge region (1), which is surrounded by a generally coplanar diffuse light discharge region (2) such that scattered light is discharged from the diffuse light discharge region (2) around the direct light discharge region (1), characterized in that the bulb (6) and the direct light reflector (4) are arranged in a housing (10), said housing having a planar inner surface which overlies the reflector and which forms an additional reflector (7) which reflects at least a portion of light from said bulb to said diffuse light discharge region; and in that the housing (10) is terminated in at least a largely dust-proof manner by a transparent planar plate extending across and covering said direct light discharge region and a planar scattering plate extending across and covering said diffuse light discharge region, said transparent planar plate and said planar scattering plate being coplanar with each other, and wherein the direct light discharge region (1) has a circular shape, and the diffuse light discharge region (2) is bounded on the inner side by a circular line (3) and on the outer side by a polygonal line or by a further circular line. ### Claim 2 (depends on 1) A built-in lamp in accordance with claim 1, characterized in that the direct light discharge region (1) and the diffuse light discharge region (2) can be acted on by a common bulb (6). ### Claim 3 (depends on 1) A built-in lamp in accordance with claim 1, characterized in that the reflector opening defining the direct light discharge region (1) is associated with a direct light reflector (4) on whose side remote from the direct light discharge region (1) an additional reflector or background reflector (7) is provided. ### Claim 4 (depends on 1) A built-in lamp in accordance with claim 1, characterized in that a light passage region is formed between the additional reflector (7) and the direct light reflector (4). ### Claim 5 (depends on 1) A built-in lamp in accordance with claim 1, characterized in that the diffuse light discharge region (2) can only be acted on indirectly by the bulb (6) via the additional reflector (7). ### Claim 6 (depends on 1) A built-in lamp in accordance with claim 1, characterized in that the additional reflector (7) is formed at least partly by at least one planar or pre-determinably curved or kinked reflector surface which ensures a pre-determinable splitting of the portion of the reflected light directed to the direct light discharge region (1) and to the diffuse light discharge region (2). ### Claim 7 (depends on 1) A built-in lamp in accordance with claim 1, characterized in that the housing (10) is made to be light-proof and/or dust-proof. ### Claim 8 (depends on 1) A built-in lamp in accordance with claim 1, characterized in that the additional reflector (7) is made to be specularly reflecting or diffusely reflecting. ### Claim 9 (depends on 1) A built-in lamp in accordance with claim 1, characterized in that the direct light reflector (4) is made to be specularly reflecting on its inner side. ### Claim 10 (depends on 1) A built-in lamp in accordance with claim 1, characterized in that the direct light reflector (4) is made to be specularly reflecting on its outer side. ### Claim 11 (depends on 1) A built-in lamp in accordance with claim 1, characterized in that the bulb (6) is located inside the direct light reflector (4) and/or between the direct light reflector (4) and the additional reflector (7). ### Claim 12 (depends on 1) A built-in lamp in accordance with claim 1, characterized in that the translucent scattering plate (13) and the plate (13), which is in particular transparent, are made in one piece. ### Claim 13 (depends on 1) A built-in lamp in accordance with claim 1, characterized in that the polygonal line is a rectangular or square line (8). ### Claim 14 (depends on 1) A built-in lamp in accordance with claim 1, characterized in that the direct light reflector (4) is held pivotably in the housing (10). ### Claim 15 (depends on 1) A built-in lamp in accordance with claim 1, characterized in that a common inclination of the direct light discharge region (1) with the diffuse light discharge region (2) is adjustable with respect to the installation surface (11) by a pivoting of the direct light reflector (4); or in that an inclination of the direct light discharge region (1) is adjustable with respect to the diffuse light discharge region (2) by a pivoting of the direct light reflector (4). ### Claim 16 (depends on 1) A built-in lamp in accordance with claim 1, characterized in that the direct light reflector (4) is held pivotably in the housing (10) together with the bulb (6).