Abstract: An optical element for use in front of a light source for obtaining a skylight appearance, a lighting system and a luminaire are provided. The optical element comprises a light transmitting cell which comprises a light transmitting channel, a light input window, a light exit window and a wall. The light transmitting channel collimates a part of light emitted by the light source. The light exit window emits light with the skylight appearance. At least a part of the light exit window is arranged at a second side of the light transmitting channel opposite to the first side. The wall is interposed between the light input window and the part of the light exit window. The wall encloses the light transmitting channel. At least a part of the wall is reflective and/or transmissive in a predefined spectral range to obtain a blue light emission at relatively large light emission angles with respect to a normal to the part of the light exit window.

Abstract: The present disclosure relates to a backlight for illuminating back lit displays (e.g. LC displays of LCD televisions). In order to enable a thin design of the backlight and a high uniformity of the light emitted by the backlight, an apparatus may be provided with transparent and diffusing masking elements that may mask individual light sources and may diffuse light back into a light guide. Absorbing elements and/or retro-reflective elements may be arranged proximate the light sources in order to avoid generation of bright spots or rings around the light sources.

Abstract: The invention provides an interface (20) for converting a desired physiological plant response into control instructions for at least one lighting system (4,5) which has an adjustable lighting property, said interface (20) comprising: a receiver for receiving a desired physiological plant response; a processor functionally coupled to said receiver for converting said desired physiological plant response into said control instructions, and a transmitter (7), functionally coupled to said processor for transmitting said control instructions to said at least one lighting system (4,5) wherein said desired physiological plant response is defined as a set point in a multi-dimensional horticulture action space.

Abstract: There is provided a lighting device comprising at least one light source for providing light, a envelope encompassing said light source, a base to which said envelope is engaged, and a control means for adjusting the lighting settings of said lighting device. The control means are arranged for detecting a position in relation to the base of a point of reference being movably arranged on the lighting device. The lighting settings are adjusted in response to the detected position.

Abstract: The present invention is based on the idea of providing an illumination system with a light guide (10) reduces the risk of causing non-uniformity in the light emitted by illumination system. With a light-guide (10) that has a curve-shaped top surface such that incident light falls on the top surface (18) at an angle larger than the critical angle of the light-transmissive light guide, the risk of hard boundaries and hot spots appearing may be reduced.

Abstract: The invention provides a lighting system comprising (i) a lighting device comprising a plurality of light sources for application in a horticulture production facility, wherein the light sources are configured to illuminate with horticulture light crops, wherein the lighting system further comprises (ii) a control unit configured to control the light intensity of local light at a location, wherein the local light is the sum of the horticulture light and light at the location originating from an optional other light source, and wherein the control unit is configured to prevent a change in the photosynthetic photon flux density (PPFD) of the local light at the location of on average more than 50 ?mol/sec/m2 over a predetermined period of time selected from the range of equal to or smaller than 5 minutes by controlling the contribution of the horticulture light to the local light.

Abstract: The invention provides a method for enhancing the nutritional value in a first plant part (2) of a crop (1), wherein the first plant part (2) comprises an edible plant part, wherein the crop (1) in addition to the first plant part (2) comprises one or more other plant parts (3), wherein the method comprises illuminating during a nutritional enhancement lighting period a target part (5) of said first plant part (2) with horticulture light (511) that is selected to enhance formation of a nutrient in said first plant part (2) while allowing one or more other plant parts (3) to be subjected to different light conditions, wherein the nutritional enhancement lighting period is started within two weeks from harvest of the first plant part (2).

Abstract: A lighting system for providing a daylight appearance and a luminaire are provided. The lighting system comprises a plurality of light emitters and a plurality of optical elements. Said plurality of light emitters emit a wide light beam. Each optical element of at least a subset of the plurality of optical elements is related to a light emitter of the plurality of light emitters, thereby forming a pair.

Abstract: The invention provides a method for providing horticulture light (511) to a crop (1), the method comprising sideways illuminating the crop (1) with the horticulture light (511) of a lighting device (500), the lighting device (500) comprising a grid (530) comprising a plurality of light emitting diodes (LEDs) (510) and a plurality of through holes (570), wherein one or more of the plurality of LEDs (510) are configured to provide said horticulture light (511).

Abstract: A lighting element (100), a lighting system and a luminaire are provided. The lighting element (100) is used for obtaining a skylight appearance and comprises a white light emitting means (104) for emitting white light, a blue light emitting means 106 for emitting blue light and a Fresnel lens (102). The Fresnel lens (102) is arranged to receive light from the white light emitting means (104) and from the blue light emitting means (106). The white light emitting means (104) is arranged in a first relative position with respect to the Fresnel lens (102) to collimate at least a part of the light emitted by the white light emitting means (104) to obtain a collimated directed light beam in a specific direction. The blue light emitting means (106) is arranged in a second relative position with respect to the Fresnel lens (102) to obtain a blue light emission at least outside the collimated directed light beam.

Abstract: The present invention relates to alight-emitting panel (1) comprising: a first panel sheet (11), the first panel sheet being optically transparent; a second panel sheet (12); and a cellular support panel (10) sandwiched between the first panel sheet and the second panel sheet. The cellular support panel comprises optically transparent cell walls (13) defining a plurality of tubular channels (14) extending from the first panel sheet towards the second panel sheet. The light-emitting panel (1) further comprises a two-dimensional light-source array (15;16;24;27) comprising a plurality of light-sources (18a-b;19a-b) each being arranged to emit light into at least one of the tubular channels of the cellular support panel. Various embodiments of the present invention provide a cost-efficient light-emitting panel with advantageous light-emission and mechanical properties.

Abstract: An optical element, a lighting system and a luminaire is provided. The optical element comprises a plate 100 and a plurality of collimating means. The optical element is to be used in front of a light source comprising a light emitting surface 106, and the optical element is configured to obtain a skylight appearance. The plate 100 is to be arranged parallel to the light emitting surface 106. The plate 100 is opaque and comprises a plurality of holes 104. The plate 100 further comprises a reflective surface 102 which is to be arranged parallel to the light emitting surface 106. The reflective surface 102 is light reflective in a predetermined spectral range to obtain a blue light emission 100. The plurality of collimating means collimate a part of the light received from the light source to obtain a collimated light beam 112 in a specific direction. Each one of the collimating means comprises one of the plurality of holes of the plate 104.

Abstract: A lighting system for providing a daylight appearance and a luminaire are provided. The lighting system comprises a plurality of light emitters and a plurality of optical elements. Said plurality of light emitters emit a wide light beam. Each optical element of at least a subset of the plurality of optical elements is related to a light emitter of the plurality of light emitters, thereby forming a pair.

Abstract: There is provided a lighting device (100) comprising at least one light source for providing light, a envelope encompassing said light source, a base to which said envelope is engaged, and a control means for adjusting the lighting settings of said lighting device. The control means are arranged for detecting a position in relation to the base of a point of reference being movably arranged on the lighting device. The lighting settings are adjusted in response to the detected position.

Abstract: An optical element (100) for use in front of a light source (102) for obtaining a skylight appearance, a lighting system and a luminaire are provided. The optical element (100) comprises a light transmitting cell which comprises a light transmitting channel (116), a light input window (106), a light exit window (110) and a wall (108). The light transmitting channel (116) collimates a part of light (104) emitted by the light source (102). The light input window (106) is arranged at a first side of the light transmitting channel (116) and receives light (104) from the light source (102). The light exit window (110) emits light with the skylight appearance. At least a part of the light exit window (110) is arranged at a second side of the light transmitting channel (116) opposite to the first side. The wall (108) is interposed between the light input window (106) and the part of the light exit window (110). The wall (108) encloses the light transmitting channel (116).

Abstract: The invention relates to a light-guide (100), an illumination system (200), a luminaire (400), a scanning backlight system (200) and a display device. The light-guide comprises a plurality of light-guide segments (10), each light-guide segment being substantially optically separated from a neighboring light-guide segment. Each light-guide segment comprises light-extraction means (40) for extracting at least part of the distributed light via a front wall (20) to illuminate in operation a light output window (220). A distance (D) between the front wall and the light output window being smaller at a center (C) of the front wall compared to a predefined edge (50) of the front wall. The predefined edge of the front wall is an edge at which the light-guide segment is arranged adjacent to the neighboring light-guide segment.

Abstract: It is presented a light guide (1) having a polygonal shape with a plurality of sides (5), each side (5) connected by two corners (5). At least one of the corners is an in-coupling corner (4) for in-coupling of light into the light guide (1). At least one of the sides (5) has is slanting and collimates light in-coupled from an adjacent light in-coupling corner (4). The slanting side (5) can also reflect light towards a planar light emitting surface (3) for out-coupling of light therethrough. The light in-coupled in a light in-coupling corner (4) is collimated as if the light guide (1) is an equilateral triangle (2) having three slanting sides.

Abstract: The invention relates to a light-emitting device (1) comprising: a light source (2) for emitting light of a first wavelength range; a light guide (3) having a light receiving surface (4) for receiving at least part of said light emitted by the light source (2), a front surface (31) and a rear surface (32), for guiding light of said first wavelength range by total internal reflection at said front surface and said rear surface; a plurality of outcoupling elements (5) for outcoupling light from the light guide such that at least part of the light that is outcoupled by the outcoupling elements exits the light guide through said rear surface; a reflective member (6) arranged in rear of said light guide to reflect light that is outcoupled from the light guide; and a wavelength converting member (8) comprising a wavelength converting material arranged outside the light guide to convert light of said first wavelength range to light of a second wavelength range.

Abstract: A lighting system is presented. The lighting system comprises a light guide (3), a lighting source (5) arranged for coupling light into the light guide (3), wherein the light guide (3) is arranged such that at least part of the light is emitted in a first general direction (21, 121), and at least part of the light is emitted in a second general direction (23, 123) different to the first direction (21, 121).