# US 2018/0320852 A1 · Micro-projection light module for a vehicle headlight > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0320852 A1 - Document ID: US20180320852A1 - Status: Published application - Kind: A1 - Application number: 15/768,317 - Filed: 2016-10-24 - Published: 2018-11-08 - Earliest claimed: 2015-10-23 - Assignees: ZKW Group GmbH - Applicants: ZKW Group GmbH - Inventors: Bernhard MANDL - Web page: https://patentgrep.com/patent/US20180320852A1 ## CPC - F21S 41/143: the main emission direction of the LED being parallel to the optical axis of the illuminating device - 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 41/275: Lens surfaces, e.g. coatings or surface structures - F21S 41/285: {Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805} - F21S 41/322: {the reflector using total internal reflection} - F21S 41/43: characterised by the shape thereof - F21S 41/635: {by moving refractors, filters or transparent cover plates} - F21W 2102/19: for curves - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS ## Abstract A micro-projection light module (1) for a vehicle headlight, comprising at least one light source (2) and at least one projection arrangement (3) which images the light emitted from the at least one light source (2) into an area in front of the motor vehicle in the form of at least one light distribution, wherein the projection arrangement (3) comprises an entry optics (30) having one, two, or more micro entry optics (31) preferably arranged in an array, and an exit optics (40) having one, two, or more micro exit optics (41) preferably arranged in an array, wherein each micro entry optics (31) is paired with precisely one micro exit optics (41), wherein the micro entry optics (31) are designed in such a way and/or the micro entry optics (31) and the micro exit optics (41) are arranged relative to one another in such a way that substantially all the light emitted from a micro entry optics (31) enters precisely only into the paired micro exit optics (41), and wherein the light pre-shaped by the micro entry optics (31) is imaged by the micro exit optics (41) into an area in front of the motor vehicle in the form of at least one light distribution (LV1-LV5; GLV), wherein the at least one light source (2) is paired with an ancillary optics arrangement (4), the at least one light source (2) irradiates the light emitted therefrom into said at least one ancillary optics arrangement (4), said ancillary optics arrangement (4) being designed in such a way that the light emitted therefrom is directed substantially in parallel, and the entry optics (30) having at least one planar boundary surface (31′), wherein the at least one planar boundary surface (31′) faces the ancillary optics arrangement (4). ## Claims ### Claim 1 A micro-projection light module (1) for a vehicle headlight of a motor vehicle, comprising: at least one light source (2) and at least one projection arrangement (3) which images the light emitted from the at least one light source (2) into an area in front of the motor vehicle in the form of at least one light distribution, wherein the at least one projection arrangement (3) comprises: an entry optics (30) having one, two, or more micro entry optics (31) arranged in an array, and an exit optics (40) having one, two, or more micro exit optics (41) arranged in an array, wherein each micro entry optics (31) is paired with precisely one micro exit optics (41), wherein the micro entry optics (31) are designed in such a way and/or the micro entry optics (31) and the micro exit optics (41) are arranged relative to one another in such a way that substantially all the light emitted from a micro entry optics (31) enters precisely only into the paired micro exit optics (41), and wherein the light pre-shaped by the micro entry optics (31) is imaged by the micro exit optics (41) into an area in front of the motor vehicle in the form of at least one light distribution (LV1-LV5; GLV), wherein the at least one light source (2) is paired with an ancillary optics arrangement (4), the at least one light source (2) irradiates the light emitted therefrom into said at least one ancillary optics arrangement (4), said ancillary optics arrangement (4) being designed in such a way that the light emitted therefrom is directed substantially in parallel, and the entry optics (30) having at least one planar boundary surface (31′), wherein the at least one planar boundary surface (31′) faces the ancillary optics arrangement (4). ### Claim 2 (depends on 1) The micro-projection light module according to claim 1, which is configured such that the light emitted from the ancillary optics arrangement (4) impinges on the at least one planar boundary surface (31′). ### Claim 3 (depends on 1) The micro-projection light module according to claim 1, which is configured such that the light emitted from the ancillary optics arrangement (4) irradiates substantially the entire planar boundary surface (31′). ### Claim 4 (depends on 1) The micro-projection light module according to claim 1, wherein the ancillary optics arrangement (4) is formed as a collimator. ### Claim 5 (depends on 1) The micro-projection light module according to claim 1, wherein the ancillary optics arrangement (4) is formed in one piece with the entry optics (30). ### Claim 6 (depends on 1) The micro-projection light module according to claim 1, wherein a micro entry optics (31) and a micro exit optics (41) paired with the micro entry optics (31) form a micro-optics system, which micro-optics system comprises at least one micro-optics focal point (F1) and/or widens the light passing therethrough in the horizontal direction. ### Claim 7 (depends on 6) The micro-projection light module according to claim 6, wherein each micro entry optics (31) focuses the light passing therethrough in the at least one micro-optics focal point (F1). ### Claim 8 (depends on 6) The micro-projection light module according to claim 6, wherein a micro-optics focal point (F1) of each micro entry optics (31) lies before the paired micro exit optics (41) in the light emission direction, wherein the micro entry optics (31) focus the light passing therethrough in the vertical direction in each case onto the micro-optics focal points (F1) lying before the micro exit optics (41), and wherein the micro exit optics (41) have a focal point coincident in each case with the micro-optics focal point (F1) of the paired micro entry optics (31). ### Claim 9 (depends on 1) The micro-projection light module according to claim 1, wherein each micro entry optics (31) has a curved boundary surface (30′), which curved boundary surface (30′) has a minimum radius of curvature value (Rmin). ### Claim 10 (depends on 1) The micro-projection light module according to claim 1, wherein each micro entry optics (31) is formed as a collecting optics or as a free-form optics or as a Fresnel lens and/or each micro exit optics (41) is formed as a projection optics or as a spherical lens or as in a spherical lens or as a free-form lens or as a Fresnel lens. ### Claim 11 (depends on 1) The micro-projection light module according to claim 1, wherein boundary surfaces (31′, 41′) of micro entry optics (31) and micro exit optics (41) paired with one another facing the ancillary optics arrangement (4) are formed congruently with one another, preferably in a planar manner, and preferably are also arranged congruently with one another. ### Claim 12 (depends on 1) The micro-projection light module according to claim 1, wherein the optical axes (310, 410) of micro entry optics (31) and micro exit optics (41) paired with one another run parallel to one another, and preferably are coincident. ### Claim 13 (depends on 1) The micro-projection light module according to claim 1, wherein at least one first screen device (50) is arranged between the entry optics (30) and the exit optics (40), wherein the first screen device (50) preferably lies in a plane spanned by the micro-optics focal points (F1), and for example for at least one pair of micro entry and micro exit optics (31, 41) paired with one another, preferably for a plurality of pairs, and in particular for all pairs comprises a screen having in each case at least one, for example precisely one, optically effective screen edge (51′, 52′, 53′, 54′, 55′). ### Claim 14 (depends on 13) The micro-projection light module according to claim 13, wherein at least one second screen device (60, 70) is arranged between the entry optics (30) and the exit optics (40), wherein the second screen device (60, 70) is arranged preferably between the first screen device (50) and the exit optics (40) or between the entry optics (30) and the first screen device (50). ### Claim 15 (depends on 14) The micro-projection light module according to claim 14, wherein the second screen device (60, 70) for at least one pair of micro entry and micro exit optics (31, 41) paired with one another, preferably for a plurality of pairs, and in particular for all pairs comprises at least one screen (61 to 65, 71 to 75) having in each case at least one, for example precisely one, optically effective screen edge (61′ to 65′, 71′ to 75′), wherein all screens of the second screen device (60, 70) preferably have identical screen edges or in particular at least two screens of the second screen device (60, 70) have screen edges of different design, wherein at least one of the optically effective screen edges (61′ to 65′, 71′ to 75′) preferably has a gable-like course and/or for example at least one upper or one lower (with respect to the vertical direction (V)) optically effective screen edge (61′ to 65′, 71′ to 75′) of the screen (61 to 65, 71 to 75) has a sloping course, rising from the optical axis (310, 410) outwardly towards the screen. ### Claim 16 (depends on 14) The micro-projection light module according to claim 14, wherein the first screen device (50) and the second screen device (60) are identical and/or the first screen device (50) is formed in one piece with the second screen device (60, 70). ### Claim 17 (depends on 14) The micro-projection light module according to claim 14, wherein the exit optics (40) is formed in one piece with the at least one second screen device 960, 70) and/or the second screen device (60, 70) is arranged on the boundary surface 40′) of the exit optics (40) facing the entry optics (30). ### Claim 18 (depends on 1) The micro-projection light module according to claim 1, wherein the projection arrangement (3) consisting of entry optics (30) and exit optics (40) is formed of two components separated from one another and the exit optics (40) is mounted displaceably in relation to the entry optics (30), wherein the exit optics (40) and/or the second screen device (60, 70) (in the installed position of the micro-projection light module (1)) are/is displaceable in the vertical and/or horizontal direction and/or parallel to the entry optics (30). ### Claim 19 (depends on 1) The micro-projection light module according to claim 1, wherein the light source (2) comprises at least one semiconductor-based light source, which semiconductor-based light source preferably has one, two or more LEDs and/or laser diodes, wherein the LEDs and/or laser diodes preferably can be controlled independently of one another. ### Claim 20 (depends on 1) The micro-projection light module according to claim 1, which comprises two or more light sources for the micro-projection light module (1), and the light sources can be controlled independently of one another. ### Claim 21 (depends on 1) The micro-projection light module according to claim 1, wherein each micro-optics system consisting of a micro entry optics (31) and a micro exit optics (41) is paired with precisely one, preferably semiconductor-based light source, which preferably comprises precisely one light-emitting diode (LED) or precisely one laser diode. ### Claim 22 (depends on 1) The micro-projection light module according to claim 1, wherein two or more light source groups are provided, wherein each light source group comprises at least one light source (2), and wherein the light sources (2) of a light source group emit light of the same colour (R, G, B), and wherein the light sources of different light source groups emit light of different colour (R, G, B), and wherein each light source group illuminates a region (3R, 3G, 3B) of the at least one projection arrangement paired specifically with this light source group, and wherein the different regions (3R, 3G, 3B) are of identical design or are designed to produce identical light distributions, wherein three light source groups are preferably provided, wherein in particular one light source group emits red light, one light source emits green light, and one light source group emits blue light. ### Claim 23 (depends on 1) A lighting device for a vehicle headlight, comprising one, two, or more micro-projection light modules (1) according to claim 1. ### Claim 24 (depends on 23) The lighting device according to claim 23, wherein two or more groups of micro-projection light modules (AA, AA1, AA2, SS1, BF1-BF8, FL, ABL, SA1, SA2) are provided, and wherein each group comprises one, two, or more micro-projection light modules (1), wherein micro-projection light modules (AA, AA1, AA2, SS1, BF1-BF8, FL, ABL, SA1, SA2) of one group produce the same light distribution (LVAA, LVAA1, LVAA2, LVSS1, LVBF1-LVBF8, LVFL, LVABL, LVSA1, LVA2), and wherein micro-projection light modules (AA, AA1, AA2, SS1, BF1-BF8, FL, ABL, SA1, SA2) from different groups produce different light distributions (LVAA, LVAA1, LVAA2, LVSS1, LVBF1-LVBF8, LVFL, LVABL, LVSA1, LVSA2), wherein the light sources of each group of micro-projection light modules can be controlled independently of the light sources of the other group(s). ### Claim 25 (depends on 24) The lighting device according to claim 24, wherein the projection arrangements (3) of the micro-projection light modules (AA, AA1, AA2, SS1, BF1-BF8, FL, ABL, SA1, SA2) of a group, preferably all micro-projection light modules, form a common component. ### Claim 26 (depends on 24) The lighting device according to claim 24, wherein two or more groups are provided for producing a different light distribution (LVAA, LVAA1, LVAA2, LVSS1, LVBF1-LVBF8, LVFL, LVABL, LVSA1, LVSA2), wherein each group forms a different light distribution (LVAA, LVAA1, LVAA2, LVSS1, LVBF1-LVBF8, LVFL, LVABL, LVSA1, LVSA2), selected from one of the following light distributions (LVAA, LVAA1, LVAA2, LVSS1, LVBF1-LVBF8, LVFL, LVABL, LVSA1, LVSA2): turning beam light distribution; town beam light distribution; country road beam light distribution; motorway beam light distribution; light distribution for additional light for motorway beam; cornering beam light distribution; dipped beam light distribution; dipped beam front-end light distribution; light distribution for asymmetrical dipped beam in the far field; light distribution for asymmetrical dipped beam in the far field in cornering beam mode; full beam light distribution; and glare-free full beam light distribution. ### Claim 27 (depends on 23) The lighting device according to claim 23, comprising two or more of the micro-projection light modules, wherein each micro-projection light module has at least one light source group, wherein each light source group comprises at least one light source, and wherein light sources in the same light source group emit light of the same colour (R, G, B), and wherein at least two light source groups are provided which emit light of different colours, and wherein each light source group illuminates a region (3R, 3G, 3B) of the at least one projection arrangement of its micro-projection light module paired in a dedicated manner with this light source group, and wherein the different regions (3R, 3G, 3B) are identical, or are configured for the production of identical light distributions, wherein three groups of light source groups are preferably provided, wherein in particular one group of light source groups emits red light, one group of light source groups emits green light, and one group of light source groups emits blue light, and wherein each group of light source groups comprises at least one light source group. ### Claim 28 (depends on 23) A vehicle headlight comprising one or more lighting devices according to claim 23.