Abstract: An automotive light is provided that includes a lighting assembly located inside rear body and is adapted to backlight a transparent or semi-transparent sector of a front half-shell. The lighting assembly includes a pair of light-guide bars made of photoconductive material, which extend toward each other inside the rear body and a pair of electrically-powered light sources that are located within the rear body each adjacent to the distal end of a respective light-guide bar, and are oriented to direct light produced inside the body of the facing light-guide bar. The proximal ends of both light-guide bars are shaped to form respective plate-like heads that are locally substantially coplanar to each other, so as to form/delimit therebetween a small transversal slot.

Abstract: The invention relates to an optical module of a motor vehicle lighting system, including at least one light source, a primary optical element comprising at least one primary optical member connected to an exit optical member, the primary optical member including a light entry face and a junction face connecting the primary optical member to the exit optical member, the primary optical element being a one-piece component, and an optical projection system designed to project, onto the ground, using light emitted by the light source and collected by the primary optical member, an image of the junction face, the primary optical member being arranged so that the image of its junction face that is projected onto the ground by the optical projection system is entirely bounded by substantially sharp edges.

Abstract: A dynamic automotive turn signal circuit includes at least one drive control module configured to receive a power supply signal from a body control module (BCM) to start operation, where the drive control module outputs first control signals at different delays through a delay unit; and a light emitting diode (LED) light set connected to the drive control module and lit based on the first control signals. A dynamic automotive turn signal system is further provided. The dynamic automotive turn signal circuit and the dynamic automotive turn signal system uses an external resistor to preset a high-precision delay circuit to realize the function of dynamic flowing turn signals. The external resistor can be used to configure a turn-on delay and a turn-off delay of the internal driver chip, such that the channel turn-on time and turn-off time can be flexibly adjusted.

Abstract: A vehicle window pane includes a light guide layer and a lighting device which introduces light from a lamp into the light guide layer via a light-incoupling unit arranged on the light guide layer. The lamp is mounted on a support plate and a fastening device keeps the support plate fixed in such a position on the light-incoupling unit in which the lamp is correctly positioned to radiate light into the light-incoupling unit. The fastening device comprises at least one fastening dome which protrudes from the light-incoupling unit and projects into a fastening cutout in the support plate. The substantially deformation-resistant support plate comprises at least one soft region which delimits the fastening cutout. A spreading portion of the fastening dome spreads the fastening cutout by elastically deforming the soft region.

Abstract: A vehicle lamp that achieves a slim design while forming an optimal beam pattern generates a beam pattern using a plurality of lamp modules. The plurality of lamp modules are arranged in one direction, and each of the plurality of lamp modules includes a light source that generate light; an optical guide unit, which guides incident light from the light source to be emitted forward; and an optical lens, which transmits the incident light from the optical guide unit therethrough to allow the beam pattern to be generated.

Abstract: A lamp unit for illuminating a front through an outer lens includes a first light source disposed on a back side of the outer lens, a second light source disposed on the back side of the outer lens, a first light guide body configured to guide light from the first light source to the outer lens, and a second light guide body configured to guide light from the second light source to the outer lens. The second light guide body overlaps the first light guide body from a front side in a front view. The first light guide body protrudes outward from the second light guide body. A part of light from the first light guide body is transmitted through the second light guide body and guided to the outer lens.

Abstract: A lighting device includes a light guide plate configured to guide and diffuse a light from a light source, and a garnish body including a lighting area to which the diffused light is radiated, wherein the light guide plate is disposed at a predetermined angle with respect to the garnish body.

Abstract: A plastic glazing of a window of a vehicle having a light feature includes a first vehicle window glazing component, a second vehicle window glazing component molded onto the first vehicle window glazing component, and a light unit configured to produce light for the light feature. The light unit being integrated with at least one of the following: the first vehicle window glazing component and the second vehicle window glazing component. The light unit further configured to direct the light for the light feature through or from at least one of the following: the first vehicle window glazing component and the second vehicle window glazing component. The plastic glazing is a one-piece molded plastic construction. At least one of the first vehicle window glazing component and the second vehicle window glazing component is translucent or transparent.

Abstract: A vehicle lamp assembly includes a light source that emits light, a side marker lamp having a lens, and a frustum reflector that guides light from the light source to the lens of the side marker lamp. A vehicle lighting method includes emitting light from a light source into a frustum reflector, redirecting the light within the frustum reflector, and illuminating a side marker lamp using the light redirected within the frustum reflector.

Abstract: A lighting system for vehicle includes an LED light source, at least one waveguide having at refracting surface array configured to shape light received from the LED light source into a light pattern, and a projection lens configured to receive the light pattern and project it outwardly from the vehicle. A first waveguide may shape light received from the LED light source into a low beam light pattern. A second waveguide may shape light received from the LED light source into a high beam light pattern. Generation of the high beam light pattern may include shaping light received from the LED light source through both the first and a second waveguides. The one or more waveguides may also include one or more protrusions extending from the body of the waveguide that further shape the emitted light pattern.

Abstract: 1.

Abstract: A light emitting emblem includes: a light emitting element as a light source; a housing configured to house the light emitting element; and a cover including an emblem on a surface thereof, including a light transmitting portion as defined herein, and attached to the housing to cover the light emitting element, at least a part of an outer surface of the light transmitting portion is exposed to an outside as a light emitting region of the cover, an inner surface of the light transmitting portion includes a bent portion being a boundary line between a plane and a plane different in orientation, and all low-lightness lines, which are linear low-brightness regions appearing on a surface other than the inner surface of the light transmitting portion due to a factor including refraction of light incident on the bent portion, appear in a region other than the light emitting region.

Abstract: Parallel light traveling in a direction perpendicular to an outgoing surface having a curved surface is emitted. A light guide member according to one or more embodiments may include: an incident surface where light from a light source enters; at least one reflective surface that reflects the light having entered from the incident surface; and an outgoing surface that is formed of a curved surface and emits the light reflected by the reflective surface. The reflective surface reflects the light having entered from the light source in a direction in which the incident angle of the light incident on the outgoing surface is constant.

Abstract: A lighting device for a vehicle steering wheel rim, comprising a holding body comprising at least one internal wall with at least one opening, at least one light source arranged to emit light, a diffuser arranged to diffuse the light coming from the at least one light source towards the vehicle occupant, a light guide arranged to guide the light emitted from the at least one light source towards the diffuser, wherein the light guide comprises a light collecting face arranged on a first side of the opening, a light emitting face arranged on a second side of the opening, and the light guide is also engaged with the diffuser to shape it with a predetermined size.

Abstract: Disclosed is a lamp module for a vehicle including a first light source that outputs light, a light guide part provided on a front side of the first light source, and a first optic member provided between the first light source and the light guide part, to which the light output from the first light source is input, and that outputs the light input from the first light source to the light guide part, a first recessed area having a shape that is recessed upwards is formed on a lower surface of the light guide part.

Abstract: The present utility model provides an optical element, comprising: a light entry surface; a first reflective surface and a second reflective surface; a light exit surface; and at least one connecting surface, located between the first reflective surface and/or the second reflective surface on the one hand and the light exit surface on the other, wherein the connecting surface at least partly comprises an enhanced reflection part for expanding a maximum exit angle of emergent light exiting via the light exit surface. Advantages: there is no need to process a surface at the light exit surface, so the range of applicability of the optical element is increased; moreover, the optical element according to the present utility model has a greater distance between the light exit surface and light entry surface thereof, i.e. can be thicker, so the optical element can adapt to a greater variety of shapes.

Abstract: A decorative sheet is a decorative sheet to be attached to a surface of a decoration target part, and includes a base film layer formed of a base film having a sheet shape, a decorative layer representing a decorative pattern, a light shield layer that is provided on a back side position with respect to the decorative layer and that includes a light transmitting portion having a predetermined shape, and a medium color layer formed between the decorative layer and the light shield layer.

Abstract: An optical device (10) for a motorcycle headlamp, the optical device (10) comprising: a primary optics (100) having a base body (110) and a plurality of light guiding elements (120) for forming a light distribution in a main direction (X), wherein each light guiding element (120) has a common light output surface (130) having an optically relevant area (131), a holder (300), a cover element (400), which is attachable to the holder (300), wherein the cover element (400) in combination with the holder (300) is configured to fix the position of the primary optics (100) between the holder (300) and the cover element (400), when the cover element (400) is attached to the holder (300), wherein the primary optics (100) comprises a stabilizing structure (200), wherein the stabilizing structure (200) is built as a protrusion projecting from the common light output surface (130) in the main direction (X), wherein the stabilizing structure (200) having a first support surface (210), and wherein the cover element (400

Abstract: A signal lighting device or lighting device, for a motor vehicle headlight, including light sources for emitting light rays and a light guiding body (LGB) with two light-emitting surfaces (LESs). The LGB includes a beam splitting device with a total internal reflection surface (TIRS), which totally reflects part of the incident light rays and deflects them from the light guide main propagation direction to one of the LESs. The TIRS has individual optical structures (OS), which allow incident light rays to pass through to the other LES. Each OS is designed as a recess in the TIRS, the recess, starting from an opening in the LGB, being delimited by lateral surfaces extending into the LGB. One lateral surface (the base surface) is oriented such that light rays pass through it toward the first LES.

Abstract: The invention relates to a lighting device, for a motor vehicle, including a plurality of light sources, which have a plurality of primary lenses dedicated to each of the respective light sources for focusing the light emitted by the respective light sources. The lighting device also has a secondary optics element which has a plurality of light entry surfaces dedicated to each respective light source and one light exit surface. A grid is located downstream of the light exit surface on the secondary optics element in the exit direction of the light, for segmenting the light exiting the light exit surface.

Abstract: A laminated glazing having a first glass substrate (104) and a second glass substrate (108) and a polymer interlayer (106) laminated between the first glass substrate and the second glass substrate, being formed with a light path (120) formed in any one or combination of the first and second glass substrates and the polymer interlayer for guiding light emitted from a light source (112), a light introduction surface (110) for introducing the light emitted from the light source into the light path, and a light extraction surface (130,150) for extracting, from the light path, the light to either one or both of an interior and an exterior of the first and second glass substrates.

Abstract: To radiate light with uniform color and illuminance in a longitudinal direction, this vehicle light guide is rod-shaped and is disposed at a front portion of a vehicle. The vehicle light guide includes a base portion having a curved portion curved rearward from a front toward a side of the vehicle and guiding light from a light source so as to be emitted from an emission face at a front side of the vehicle, a plurality of prism portions arrayed in a longitudinal direction along a back face of the base portion and that reflect light forward, and a diffusing portion positioned in at least the curved portion in the longitudinal direction of the base portion and provided in a strip form on a bottom face side of the prism portions, and that diffuses light.

Abstract: A trim element having a first aspect layer, a lighting device emitting light to the first aspect layer, and a first obturation layer extending between the lighting device and the first aspect layer. The first obturation layer includes at least two first optical obturation areas, configurable between an open position, in which a first optical obturation area lets light pass through, and a closed position, in which a first optical obturation area prevents the passage of light. The trim element includes a second aspect layer and a second obturation layer having at least two second optical obturation areas that are configurable between an open position and a closed position.

Abstract: An illumination apparatus for vehicles having a light source, a support plate for receiving the light source, and an optical unit arranged in front of the light source in the main emission direction to deflect light emitted by the light source onto a roadway in front of the vehicle in accordance with a predetermined light distribution. The light source has a light-emitting surface and a light source frame surrounding the same. The light source is surrounded by a shielding frame with a wall that is raised in the main emission direction and encloses an intermediate space between the light source and the optical unit.

Abstract: A vehicle lighting assembly includes a primary lens and a light source on a first side of the primary lens. The light source is configured to emit light through the primary lens. A light blade is on an opposite, second side of the primary lens. A secondary lens covers a portion of the light blade. A vehicle lighting method includes emitting light from a light source, directing the light through a primary lens, directing the light from the primary lens through a light blade, and directing the light from the light blade through a secondary lens.

Abstract: A vehicle lamp includes a first optical unit that irradiates light for forming a first beam pattern; a second optical unit that irradiates light for forming a second beam pattern and is disposed on one side of the first optical unit in a left-right direction; and a lens unit disposed in front of the first optical unit and the second optical unit to allow the light irradiated from at least one of the first optical unit or the second optical unit to pass through the lens unit to form at least one of the first beam pattern or the second beam pattern. The lens unit includes a first lens module corresponding to the first optical unit and a second lens module corresponding to the second optical unit, and the first lens module and the second lens module are integrally formed with one another.

Abstract: A light guide is provided having an elongate body extending in a longitudinal direction having a light transmission portion with a forward light exit surface and a reflective track extending opposite the light exit surface. A plurality of reflective elements are formed along the reflective track and spaced apart in the longitudinal direction. Each reflective element has a center segment and a pair of edge segments each oriented at a spread angle from the center segment toward the light transmission portion, thereby increasing a spread of light output in a horizontal direction from the light transmission portion.

Abstract: A light module is provided with a bulb shield. The light module includes a light generation unit for emitting light and an optic for shaping the light emitted by the light generation unit. The light generation unit includes a light-emitting surface. A bulb shield is arranged between the optic and the light generation unit for covering the light generation unit. The bulb shield includes a passage for the light emitted by the light-emitting surface. The light module includes a bearing structure for the bulb shield. The bulb shield is glued to the bearing structure by a first adhesive bond and the bulb shield is glued to the bearing structure by a second adhesive bond. A first adhesive used to produce the first adhesive bond and a second adhesive used to produce the second adhesive bond are different.

Abstract: Disclosed are a lamp for a vehicle and a vehicle including the same. A lamp for a vehicle includes a lamp housing, a light source unit mounted on the lamp housing and that irradiates light, a bezel installed in the lamp housing, an optical fiber fixed to the bezel, coupled to the light source part, and that outputs the light irradiated from the light source part, and a tension unit provided in the bezel, and that applies a tension to the optical fiber in a state, in which the optical fiber is fixed to the bezel.

Abstract: A lighting device for a motor vehicle includes a lighting apparatus which has one or more light sources and one or more transparent bodies which each have a surface made of a plurality of flat facets. The lighting device is configured such that light which comes from a light source at least in part passes through a transparent body and is refracted at facets of the transparent body. The light which passes through the transparent body at least in part exits from the lighting device in order to create a light distribution. An associated transparent body is a molded component having one or more recesses which are integrally molded in the molded component, the molded component being clamped in the lighting device by the engagement of one or more projections into the one or more recesses.

Abstract: A light-emitting device includes a plurality of first light-emitting regions contiguously arranged in a first direction. Each of the first light-emitting regions includes at least one light-emitting cell. A plurality of second light-emitting regions are contiguously arranged in the first direction. Each of the second light-emitting regions includes at least one light-emitting cell. The plurality of second light-emitting regions are adjacent to the plurality of first light-emitting regions in a second direction that intersects the first direction. A first driver controller controls emission of the plurality of first light-emitting regions. Each of the first light-emitting regions has a greater dimension than each of the second light-emitting regions in the second direction. The first driver controller simultaneously turns on or off an entirety of each of the first light-emitting regions.

Abstract: A second light source, a second incidence section and a second reflecting section in a vehicle lamp are disposed closer to a light guide section than a first light source, a first incidence section and a first reflecting section, a stepped section is provided between the first reflecting section and the second reflecting section, and the first reflecting section is disposed at above the stepped section and the second reflecting section is disposed at below the stepped section when seen from a side of the first incidence section and a side of the second incidence section.

Abstract: The present disclosure discloses a heat dissipating structure for automotive LED headlight, which comprises a radiator formed integrally, wherein the radiator comprises one or more heat radiating arms. The heat radiating arm is provided with an embedded groove used for accommodating an assembly of a lamp bead board and a heat pipe. The beneficial effect of the present disclosure is that: the heat of the lamp bead board is transferred to the radiator, thus the heat dissipation efficiency has been greatly improved.

Abstract: A vehicular lamp is provided capable of enabling an observer to visually recognize the first and the second light-emitting areas as if they are integrated (connected) with each other when emitting light regardless of viewpoint positions. The vehicular lamp includes: a first light-emitting area and a second light-emitting area adjacent to each other in a horizontal direction with a gap; a third light-emitting area observed through the gap; a gap light-emitting unit disposed behind the gap; and a light control unit disposed between the gap and the gap light-emitting unit. The gap light-emitting unit includes a front and upper view light-emitting units disposed therebelow. The upper view light-emitting unit and the light control unit each have a lower portion extending downward. The light control unit includes an optical element controlling light from the upper view light-emitting unit by a predetermined angle upward so that the light passes through the gap.

Abstract: An illumination device for a motorcycle headlamp, which device is configured to create a segmented light pattern and includes: (i) a plurality of light sources, at least some of which are configured to be activated independently from each other, (ii) a segmented light guide unit, including a plurality of light guide elements and a light homogenization body, and (iii) a projection lens, which is configured to receive the light emitted from the collective light exit surface of the light homogenization body and to project the segmented light pattern, wherein at least some of the light guide elements are part of a first group of light guide elements, said first group having a defined geometric shape of the light entry surface, which is limited by four corners connected by four side edges (left, right, lower, and upper) wherein three of the side edges are straight, and the fourth edge has a rounded protrusion, which increases the light entrance surface, and is either the left or the right edge of the respective li

Abstract: In an interior member for a vehicle, a lens extends along a light guide member, and is provided with a groove receiving the light guide member therein, a first engaging portion provided on a wall that defines the groove, and a second engaging portion provided on a wall that defines the groove, and the interior member main body is provided with a first engaged portion engaged by the first engaging portion, and a second engaged portion engaged by the second engaging portion, the lens being resiliently deformable so as to bring the walls defining the groove toward each other.

Abstract: To improve design characteristics when the light fixture is turned on in a vehicle light fixture including a plate-shaped light guide. The plate-shaped light guide (32) is configured such that light from five light sources (40A1, 40A2, 40A3, 40A4 and 40A5) is totally reflected by a plurality of reflective elements (32s) formed on a first plate surface (32a) on a rear surface side of the plate-shaped light guide, and then emitted forward of a light fixture unit from a second plate surface (32b) of the plate-shaped light guide. At that time, five light emitting regions (32A1, 32A2, 32A3, 32A4 and 32A5) are arranged at intervals in a horizontal direction in the plate-shaped light guide (32), and then the reflective elements (32s) are arranged in a state of being continuously side by side along a line L extending in a direction intersecting the horizontal direction in each of the light emitting regions (32A1 to 32A5). Each reflective element (32s) is formed in a substantially concave spherical surface shape.

Abstract: A vehicle lamp includes a light source provided on one surface of a board and a light guide body that guides light emitted from the light source, the light guide body has an incidence section located on a side of the light guide body facing the one surface of the board, an emitting section located on a side opposite to the side facing the one surface of the board, and a light guide section located between the incidence section and the emitting section, and the light guide section has a portion that extends across inside and outside a region where the light guide body overlaps with the board when seen in a plan view, that extends at an outer side of the region, and that extends from one side toward the other side of the board in at least a thickness direction of the board.

Abstract: The present disclosure relates to a headlamp lens for a vehicle headlamp, wherein the headlamp lens comprises a precision-molded body made of a transparent material, wherein the body comprises at least one light tunnel and a light-conducting part with at least one optically active light exit surface. The light tunnel comprises at least one light entry surface and merges with a bend in the light-conducting part to depict the sharp bend as a light/dark boundary by means of light coupled or radiated into the light entry surface. The surface of the light tunnel is at least partially convexly curved in the region of the bend.

Abstract: Lighting may be provided using light sources such as lighting systems with arrays of light-emitting diodes. A lighting system may be integrated into a seat, a door panel, a dashboard, or other interior portions of a system such as a vehicle. The interior portions of the vehicle may be illuminated using lighting systems to provide ambient light, to provide custom surface textures and other decorative patterns, to provide icons, text, and other information, and to provide custom gauges and other illuminated regions. Illuminated regions may overlap sensors such as capacitive touch sensors, force sensors, and other sensors. The light-emitting diodes in a lighting system may supply light that passes through openings in a cover layer. The layer may be formed from fabric, leather, or other materials. Lens structures may guide light through the openings.

Abstract: A backlight unit for blind spot warning lighting includes a printed circuit board (PCB) mounted with a light-emitting diode (LED), a bottom case having the PCB embedded on a lower portion thereof, and having an opened front surface, and a top case comprising a front plate covering a the front surface of the bottom case, and a guide protrusion formed to protrude backward from a rear surface of the front plate to guide the light from the LED to the front plate, and an object of the present disclosure is to provide a backlight unit, which can uniformly emit light while unifying the number of reflection and diffusion layers, and be advantageous for applying a hot wire, thereby improving visibility.

Abstract: A vehicle luminous module intended to generate a light beam along an optical axis includes primary light guides each including an entrance dioptric interface and an exit, and a light source arranged facing an entrance dioptric interface. A projecting assembly includes a focal region and an exit member, the projecting assembly being arranged so that the light rays passing through said focal region and reaching the exit member are imaged in a projection field downstream of said projecting assembly. The exits of the guides are arranged level with the focal region. The luminous module includes at least one secondary light guide distinct from the primary light guides, and arranged so as to deviate light rays generated by the light source so that they do not reach the exit member, and/or so as to spread said light rays in said projection field.

Abstract: A vehicle lamp includes a plurality of light sources, and a light guide that guides light from the light sources incident from a light incident portion and emits the light from a light emitting portion. The light guide includes a light deflecting portion that deflects a guide direction of the light between the light incident portion and the light emitting portion. The light deflecting portion deflects each light from the plurality of light sources toward the same area of the light emitting portion.

Abstract: The present disclosure provides a lampshade structure, an unmanned aerial vehicle (UAV) arm, a UAV, and a movable platform. The lampshade structure may comprise a first light-transmitting surface of a lampshade body close to a light-emitting element and a second light-transmitting surface of the lampshade body away from the light-emitting element; wherein the first light-transmitting surface may include a scattering structure to outwardly refract light emitted by the light-emitting element to expand a light-emitting angle and an irradiation direction of the light-emitting element, thereby obtaining sufficient light in a desired direction.

Abstract: An optical lens includes a first lens, a light guide and a second lens arranged in order in a direction of an optical axis of the optical lens. The light guide has a first end and a second end opposite the first end, and an inner surface of the light guide touches at least a part of an outer edge of the second lens.

Abstract: A lamp assembly for a motor vehicle comprises a light source and a light guide, which includes a diffuser body having a diffuser inlet and a light emission portion. The diffuser body is configured to conduct light rays from the diffuser inlet to the light emission portion, so as to be visible to an observer. The light guide also includes an extension with a light collector configured to collect rays emitted by the light source, a coupling portion, and a guide body configured to conduct light rays between the light collector and the coupling portion. The coupling portion is optically coupled to the light inlet portion of the diffuser body for transmitting the light rays from the extension into the diffuser body. The diffuser body is made of a material with high light diffusion properties and the extension is made of material with relatively poor light diffusion properties.

Abstract: Wraps for a steering wheel and methods of wrapping a steering wheel with an integrated light bar assembly are disclosed. The light bar assembly is configured to be mounted to a rim of a steering wheel of a vehicle. The light bar assemblies can include components of a driver monitoring system. The light bar assembly includes two shells defining or surrounding the rim and a wrapping surrounding the two shells. A portion of the wrapping is tucked into a slot disposed between the two shells forming a slit. A lens is disposed within the slit and pinched by the wrapping to prevent leakage of light around the lens.

Abstract: A waveguide includes a light coupling portion has an interior surface and an exterior surface. The exterior surface includes light coupling features. LEDs emit light into the light coupling features. A light emitting portion has an interior surface and an exterior surface where the exterior surface defines a light emitting surface. The light emitting portion is disposed adjacent the light coupling portion. A light transmission portion optically couples the light coupling portion to the light emitting portion. A footprint of the light coupling portion is substantially the same or less than a footprint of the light emitting portion.

Abstract: A device comprising a flexible printed circuit strip is disclosed. The flexible printed circuit strip comprises a plurality of first sections connected to a plurality of second sections. The plurality of first sections are bendable in at least a first axis relative to the plurality of second sections. The plurality of first sections comprise a connector to house at least one light emitting element. The plurality of second sections comprises a protrusion with an opening between two adjacent second sections such that the protrusion is bendable in at least two axes. The plurality of second sections comprise a connector to connect an electrical power supply.

Abstract: The invention relates to a motor vehicle headlight (1) having a lamp unit (2), which has at least one light source (3) and an optical attachment (4) having a light emission surface (5), and having a projection lens (7) downstream of the lamp unit, wherein the optical attachment has a plurality of waveguide elements (6), each having a light coupling surface (8) for feeding in light from the at least one light source and having light decoupling surfaces (9) arranged in the light emission surface of the optical attachment and projects a light pattern forward in the traffic space, the waveguide elements extend between the light coupling surface and the light decoupling surface, wherein the light decoupling surface has a greater area than the light coupling surface, and each waveguide element is laterally delimited by two lateral surfaces (10), from above by a roof surface (11) and below by a floor surface (12) and tapers between the light decoupling surface and the light coupling surface, wherein the width of the