Classifications

• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
  • H05B45/20—Controlling the colour of the light
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
  • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
  • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
  • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
  • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
  • F21V23/0492—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors the sensor detecting a change in orientation, a movement or an acceleration of the lighting device, e.g. a tilt switch
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
  • H05B47/10—Controlling the light source
  • H05B47/105—Controlling the light source in response to determined parameters
  • H05B47/115—Controlling the light source in response to determined parameters by determining the presence or movement of objects or living beings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • 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
  • F21Y2113/00—Combination of light sources
  • F21Y2113/10—Combination of light sources of different colours
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • 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
  • F21Y2115/00—Light-generating elements of semiconductor light sources
  • F21Y2115/10—Light-emitting diodes [LED]

Definitions

• the present invention generally relates to lighting arrangements comprising one or more light emitting diodes, LEDs. More specifically, the present invention is related to providing indirect and direct light.
• LED light emitting diodes
• LEDs provide numerous advantages such as a longer operational life, a reduced power consumption, and an increased efficiency related to the ratio between light energy and heat energy.
• LED lamps are highly appreciated as they are very decorative.
• LED based lighting may be used to provide not only functional lighting, but also decorative lighting. It is desired to improve the decorative lighting effect of pixelated light sources.
• a light emitting diode (LED) luminaire has an elongated shape.
• the LED luminaire comprises a first luminaire part.
• the first luminaire part comprises a first linear array of first LED light sources arranged on a first elongated carrier.
• the first linear array of first LED light sources is configured to emit first linear array light through a first elongated light exit window in a first direction.
• Each first LED light source has an individually controllable light output color.
• the LED luminaire further comprises a second luminaire part.
• the second luminaire part comprises a second linear array of second LED light sources arranged on a second elongated carrier.
• the second linear array of second LED light sources is configured to emit second linear array light through a second elongated light exit window in a second direction opposite to the first direction.
• the first and second luminaire part may be formed respectively as a first compartment and a second compartment that are mutually separated, wherein the respective first and second elongated carrier function as a (part of a) separation wall between the first and second compartment.
• Said elongated carrier may extend across the LED luminaire up to the light exit windows thereby separating the LED luminaire in the first and second, substantially equal, distinguishable part.
• the first compartment thus being (at least partly) bordered by the first elongated carrier and the first light exit window
• the second compartment thus being (at least partly) bordered by the second elongated carrier and the second light exit window.
• the LED luminaire further comprises a controller.
• the controller is configured to individually control the emission of first light emitted by the first linear array of first LED light sources and the emission of second light emitted by the second linear array of second LED light sources.
• the controller is further configured to individually control the light output color of each of the first LED light sources such that a color gradient light effect is generated over (across) the first linear array of first LED light sources, such that the first linear array of first LED light sources generates a pattern of color points from a first end point having a first color point to a second end point having a second color point, optionally different from the first color point, via a plurality of intermediate points comprising intermediate color points different from the first and second color points.
• the first end point and the second end point may have the same color point, i.e. the first color point and the second color point may be the same, but preferably the first and second color point are mutually different.
• the (intermediate) color points of all intermediate points are all different, yet some intermediate color points may be mutually the same and/or may be the same as one of the first and/or second color point.
• the controller is further configured to control the second linear light array such that the second linear array light is white light.
• a LED luminaire in accordance with the first aspect of the present disclosure may thus provide a color gradient light effect in a first direction, and white light in a second direction, opposite to the first direction.
• Such a luminaire may provide functional light, such as white light provided by the second linear array of second LED light sources (or “second array”), at the same time as decorative/ambience light, such as the color gradient light effect of the first linear array of first LED light sources (or “first array”).
• the color gradient light effect may comprise a number of gradients (N).
• the number of gradients may be in the range from 3 to 5, i.e., 3 ⁇ N ⁇ 5.
• the color gradient light effect may comprise a first gradient from a first color to a second color.
• the color gradient light effect may further comprise a second gradient from the second color to a third color.
• the color gradient light effect may further comprise a third gradient from the third color to a fourth color.
• first LED light sources may be referred to as the “first LEDs”.
• second LED light sources may be referred to as the “second LEDs”.
• first light emitted by the first linear array of first LED light sources may be referred to as the “first light”.
• second light emitted by the second linear array of second LED light sources may be referred to as the “second light”.
• a LED luminaire in accordance with the first aspect of the present disclosure may be arranged in the vicinity of a wall or other surface.
• the LED luminaire may be arranged such that the first array provides first light in a direction towards the wall or surface.
• the LED luminaire may be arranged such that the first array illuminates the wall/surface.
• the LED luminaire may be arranged such that the second array provides second light in a direction away from the surface/wall, such as towards a room or open space.
• the first light may illuminate the wall/surface with the color gradient light effect.
• the first light may reflect off of the wall.
• the second light may illuminate the room/open space with white light.
• the LED luminaire has an elongated shape.
• the LED luminaire may have a length L, a width W, and a thickness T.
• the length L may be at least 10 times as long as the width W, i.e., L > 10VF.
• the length L may be at least 20 times as long as the width W, i.e., L > 20VF.
• the length L may be at least 10 times as long as the thickness T, i.e., L > 10T.
• the length L may be at least 20 times as long as the thickness T, i.e., L > 20T.
• the first and second (elongated) light exit windows may be curved.
• the first and second elongated light exit windows may be curved in a direction perpendicular to an axis of elongation of the light exit windows.
• the first and second light exit windows may form part of a tubular housing of the luminaire.
• the first and second light exit windows may each have a cross section, in a direction perpendicular to the elongation of the LED luminaire, in the shape of a circular arc.
• the LED luminaire may have an angular cross-section, such as a square cross-section.
• the LED luminaire may have a square cross-section with rounded edges.
• the first elongated light exit window may have a first opening angle which is smaller than, or equal to, 170°.
• the second elongated light exit window may have a second opening angle which is larger than, or equal to, 190°.
• the first opening angle (on) may be smaller than or equal to 150°, i.e., a ⁇ 150°.
• the first opening angle (on) may be smaller than or equal to 130°, i.e., a ⁇ 130°. More specifically, the first opening angle (on) may be smaller than or equal
• the second opening angle (on) may be larger than or equal to 210°, i.e., a 2 ⁇ 210°.
• the second opening angle (on) may be larger than or equal to 230°, i.e., a 2 ⁇ 230°.
• the second opening angle (on) may be larger than or equal to 240°, i.e., a 2 ⁇ 240°.
• the opening angle of the light-exit window defines the extent to which light emitted through the light exit window is spread.
• the LED luminaire may be arranged such that the first array illuminates a wall/surface and such that the second array provides second light in a direction away from the surface/wall, such as towards a room or open space. It is thus beneficial that the second elongated light exit window has a wider opening angle, resulting in that the beam width of the second light illuminates a larger portion of the room or open space.
• the first elongated light exit window may be transparent.
• the first elongated light exit window may be a first diffuser having a first reflectivity.
• the second elongated light exit window may be a second diffuser having a second reflectivity. The second reflectivity may be higher than the first reflectivity.
• the first elongated light exit window may be transparent, and the second elongated light exit window may be a (second) diffuser having a (second) reflectivity.
• the (second) reflectivity may be in a range from 27% to 65%.
• the first elongated light exit window may be a first diffuser having a first reflectivity
• the second elongated light exit window may be a second diffuser having a second reflectivity, wherein the second reflectivity may be higher than the first reflectivity.
• the first reflectivity may be lower than or equal to 25%.
• the second reflectivity may be in a range from 27% to 65%.
• a difference in reflectivity between the second elongated light exit window and the first elongated light exit window, or a difference between the second reflectivity and the first reflectivity may be at least 20%. More specifically, the difference in reflectivity may be at least 30%.
• the second (white) light may be more diffused than the first light (providing a color gradient light effect).
• the first light may be more pixelated than the second light.
• light emitted by the second LEDs may be mixed/ scattered/reflected by the second light exit window to provide a more homogeneous/uniform light distribution of the second linear array light.
• the light emitted by the first LEDs may be less mixed/scattered/reflected than the light emitted by the second LEDs, such that the light distribution of the first linear array light is less homogeneous than the second linear array light.
• the first elongated carrier and the second elongated carrier may be the same elongated carrier.
• first elongated carrier and the second elongated carrier may form part of a same elongated carrier.
• the first elongated carrier may be a first side of an elongated carrier
• the second elongated carrier may be a second side of the same elongated carrier.
• the first elongated carrier and the second elongated carrier may be two sides of a dual sided printed circuit board (PCB).
• PCB printed circuit board
• first elongated carrier and the second elongated carrier may form part of a flexible carrier which has been bent or folded such that the first carrier and the second carrier are arranged in opposite directions.
• first elongated carrier and the second elongated carrier may form part of a flexible PCB.
• each first LED light source may comprise a red LED emitting red LED light, a green LED emitting green LED light, and a blue LED emitting blue LED light.
• Each red LED, each green LED, and each blue LED may be individually controllable by the controller.
• the red LED may be configured to emit red LED light.
• the green LED may be configured to emit green LED light.
• the blue LED may be configured to emit blue LED light.
• each of the first LED light sources may comprise a RGB LED.
• each second LED light source may comprise a white phosphor converted LED providing white LED light having a correlated color temperature in a range from 1800K to 6500K and a color rendering index of at least 80.
• the white phosphor converted LED may be configured to provide white LED light.
• a white phosphor converted LED may comprise a LED configured to emit, e.g., blue and/or UV light.
• the LED may be covered with a phosphor layer configured to convert at least some of the emitted light to light of at least one other color, such that the combination of emitted light and color converted light appears as white light.
• the phosphor may for example comprise a green and/or yellow phosphor in combination with a red phosphor.
• the controller may be configured to vary the correlated color temperature of the white light (the second light) from a first correlated color temperature (CCT1) to a second correlated color temperature (CCT2).
• the second correlated color temperature may be at least lOOOK higher than the first correlated color temperature (i.e., CCT2-CCTl>1000K).
• the second linear array of second LED light sources may comprise at least two types of white LEDs, a first type configured to emit light of the first correlated color temperature, and a second type configured to emit light of the second correlated color temperature.
• a variable (combined) CCT may be achieved by varying a relative intensity between the light outputs of the first type of white LEDs and the second type of white LEDs.
• the LED luminaire may comprise a sensor.
• the sensor may be coupled to the controller.
• the sensor may be configured to determine a distance and/or an orientation of the first linear array of first LED light sources with respect to a surface being illuminated with/by the first linear array light.
• the controller may further be configured to individually control the first linear array light of (emitted by) the first LED light sources based on the (determined) distance and/or orientation.
• an intensity of the first light may be adapted (by the controller) based on the distance and/or orientation of the LED luminaire with respect to the surface.
• a color of the first light may be adapted based on the distance and/or orientation of the LED luminaire with respect to the surface.
• the intensity and/or color of the first light may be adapted based on the distance and/or orientation of first array with respect to the surface.
• the pattern of color points may be dependent on the (determined) distance and/or orientation.
• an average color point distance between the first color point, the second color point, and the intermediate color points may increase with increased (determined) distance.
• the controller may be configured to control the emission of the first light emitted by the first linear array of first LED light sources, such that an average color point distance between the first color point, the second color point, and the intermediate color points of the color gradient light effect is dependent on (or adapted based on) the determined distance between the LED luminaire and the surface illuminated by first linear array light.
• the average color point distance may be longer when the determined distance is longer.
• the average color point distance may be shorter when the determined distance is shorter.
• the determined distance between the second position and the surface may be shorter than the initial determined distance between the initial position and the surface.
• the average color point distance may be shorter at the second position than at the initial position.
• an intensity of the first linear array light, measured at the first elongated light exit window may increase with increasing (determined) distance.
• the controller may be configured to control the emission of the first light emitted by the first linear array of first LED light sources, such that an intensity of the first light is dependent on (or adapted based on) the determined distance between the LED luminaire and the surface illuminated by first linear array light.
• the controller may further be configured to control the first linear array of first LED light sources according to a first intensity measured at the first elongated light exit window higher than a second intensity measured at the second elongated light exit window.
• the controller may be configured to control the first array and the second array such that the first light provides a first intensity, and the second light provides a second intensity.
• the first intensity may be measured at the first light exit window.
• the second intensity may be measured at the second light exit window.
• the first intensity may be higher than the second intensity.
• the LED luminaire may be arranged such that the first light illuminates a wall, and the second light may be directed away from the wall.
• the first light may be directed towards the wall (or other surface), and reflect off of the wall into a space, e.g., a room.
• the second light may be directed away from the wall into the space.
• the second light may therefore have a lower intensity, to provide a pleasant (direct) lighting of the space, while the first light may have a higher intensity to provide reflected (indirect) lighting of the space.
• the LED luminaire may further comprise a stand arranged at one end of the luminaire.
• the stand may be arranged to position the luminaire vertically.
• the stand may comprise a base element.
• the base element may have at least one flat side surface to be arranged against a wall.
• the base may have a round or circular side wall, with a flattened portion forming the flat side surface.
• a horizontal crosssection of the base element may have the shape of a truncated circle.
• the LED luminaire may further comprise one or more mounting elements.
• the mounting elements may be configured to mount the luminaire parallel to a surface.
• the LED luminaire may further comprise a housing.
• the housing may comprise the first and second luminaire parts.
• the stand or the one or more mounting elements may comprise a distance and/or orientation adjustment means.
• the distance and/or orientation adjustment means may enable a user to adjust a distance and/or orientation of the housing with respect to the stand or the one or more mounting elements.
• the housing may be rotatable around a longitudinal axis of the
• the distance adjustment means may enable a user to adjust a position of the housing with respect to the stand or the one or more mounting elements.
• the stand or the one or more mounting elements may comprise a slit/elongated opening in which the housing, or a sliding element connected to the housing, may be slid to change the position of the housing relative to the stand or the one or more mounting elements.
• the distance adjustment means may allow the adjustment of a distance between the LED luminaire (housing) and a surface (or wall).
• a method for controlling a light emitting diode (LED) luminaire has an elongated shape and comprises a first luminaire part and a second luminaire part.
• the first luminaire part comprises a first linear array of first LED light sources arranged on a first elongated carrier.
• the first LED light sources are configured to emit first linear array light through a first elongated light exit window in a first direction.
• Each first LED light source has an individually controllable light output color.
• the second luminaire part comprises a second linear array of second LED light sources arranged on a second elongated carrier.
• the second LED light sources are configured to emit second linear array light through a second elongated light exit window in a second direction opposite to the first direction.
• the method comprises controlling the light output color of each first LED light source such that a color gradient light effect is generated over the first linear array of first LED light sources, such that the first linear array of first LED light sources generates a pattern of color points from a first end point having a first color point to a second end point having a second color point, different from the first color point, via a plurality of intermediate points having intermediate color points different from the first and second color points.
• the method further comprises controlling the second linear array such that the second linear array light is white light.
• Fig. l is a schematic longitudinal cross-section of a LED luminaire in accordance with some embodiments
• Fig. 2 is a schematic transverse cross-section of a LED luminaire, in accordance with some embodiments
• Fig. 3 is a schematic transverse cross-section of a LED luminaire, in accordance with some embodiments.
• Fig. 4 is a representation of the CIE 1931 xy chromaticity space illustrating exemplary color points, in accordance with some embodiments
• Fig. 5 is an illustration of LED luminaires having different types of stands or mounting elements, in accordance with some embodiments.
• Fig. 6 illustrates a LED luminaire, in accordance with some embodiments, arranged next to a wall/ surf ace.
• FIG. 1 is a schematic longitudinal cross-section of a LED luminaire 100 in accordance with some embodiments.
• the LED luminaire 100 has an elongated shape.
• the LED luminaire 100 may have a tubular shape, such as a squared tubular shape or a rounded tubular shape.
• the LED luminaire 100 comprises a first luminaire part 101 and a second luminaire part 106.
• the first luminaire part 101 comprises a first linear array of first LED light sources 102 (first LEDs 102) arranged on a first elongated carrier 103.
• the second luminaire part 106 comprises a second linear array of second LED light sources 107 (second LEDs 107) arranged on a second elongated carrier 108.
• the first elongated carrier 203 and the second elongated carrier 208 may be part of a same elongated carrier 211.
• the first elongated carrier 203 may be a first side of the same elongated carrier 211
• the second elongated carrier 208 may be a second side of the same elongated carrier 211.
• Each of the first LED light sources 102 has an individually controllable light output color.
• each of the first LED light sources 102 may be a RGB LED. That is, each of the first LED light sources may comprise a red LED, a green LED, and a blue LED, wherein the red LED, the green LED and the blue LED are individually controllable.
• Each of the second LED light sources 107 may be white LEDs, such as white phosphor converted LEDs.
• the first linear array of LEDs 102 is configured to emit first linear array light 104 (first light 104) through a first elongated light exit window 105 in a first direction DI.
• the second linear array of LEDs 107 is configured to emit second linear array light 109 (second light 109) through a second elongated light exit window 110, and in a second direction D2, opposite to the first direction DI.
• the first light exit window 105 may be transparent.
• the first light exit window 105 may be a diffuser having a first reflectivity.
• the second light exit window 110 may be a diffuser having a second reflectivity.
• the second reflectivity may be higher than the first reflectivity.
• the second light exit window may diffuse or scatter the second light, to increase a homogeneity or uniformity of the second light distribution.
• the first light exit window may diffuse or scatter the first light to a lesser degree than the second light exit window. The distribution of the first light may therefore be less homogenous/uniform than the second light.
• the first linear array of first LED light sources 102 comprises fewer LEDs than the second linear array of second LED light sources 107.
• the second array of LEDs 107 has a shorter pitch, i.e., distance between neighboring LEDs, than the first array of LEDs 102.
• a shorter pitch may result in a more uniform light. Therefore, the first light 104 may be more pixelated than the second light 109. In other words, the first light 104 of individual first light sources 102 may be less mixed than second light 109 of different light sources 107.
• the second light exit window 110 may give the appearance of a glowing surface.
• the individual first light sources 102 may be more or less distinguishable through the first light exit window 105.
• Figure 2 is a schematic transverse cross-section of a LED luminaire 200, in accordance with some embodiments.
• first light exit window 205 and the second light exit window 210 are both curved. Together, the first light exit window 205 and the second light exit window 210 provide the LED luminaire 200 a circular cross-section.
• the first 101 and second luminaire part 106 may be formed respectively as a first compartment 101' and a second compartment 106' that are mutually separated, wherein the respective first 203 and second elongated carrier 208 or the same (shared) elongated carrier 211, functions as a whole or part of a separation wall 212 between the first and second compartment.
• Said elongated carrier here extend as a single same elongated carrier 211 across the LED luminaire 200 up to the first 205 and second light exit window 210 thereby separating the LED luminaire in the two, substantially equal distinguishable first 101 and second luminaire part 106.
• the first compartment thus being (at least partly) bordered by the first elongated carrier and the first light exit window
• the second compartment thus being (at least partly) bordered by the second elongated carrier and the second light exit window (yet, the first and second elongated carrier may here be considered as the same elongated carrier).
• Figure 3 is a schematic transverse cross-section of a LED luminaire 300, in accordance with some embodiments.
• the first light exit window 305 has a first opening angle al smaller than 170°.
• the first light emitted through the first light exit window 305 may have an opening angle (spread) smaller than 170°.
• the second light exit window 310 has a second opening angle a2 smaller than 190°.
• the second light emitted through the second light exit window 310 may have an opening angle (spread) smaller than 190°.
• the LED luminaire 100 further comprises a controller 116.
• the controller 116 is configured to individually control a light output of the first array of LEDs 102 and of the second array of LEDs 107.
• the controller 116 is configured to individually control the light output color of each first LED light source 102 such that a color gradient light effect is generated over the first linear array of first LED light sources 102.
• the first light 104 generates a pattern of color points from a first end point having a first color point Pl to a second end point having a second color point P2, different from said first color point.
• Between the first and second point Pl, P2 are a plurality of intermediate points having intermediate color points Pn different from said first and second color points Pl, P2.
• Figure 4 is a representation of the CIE 1931 xy chromaticity space illustrating exemplary color points Pl, P2, Pn, W, in accordance with some embodiments.
• each color can be described by an (x,y) coordinate.
• the different color points Pl, P2, Pn, W therefore represent different colors. It should be understood that the CIE color space is merely an example of a color space, and that the skilled person is able to use alternative color spaces without departing from the scope of the appended claims.
• the first and second color points Pl, P2 define a straight line 420 along which all the intermediate color points Pn are aligned.
• the intermediate color points may be arranged along a curved line between the first and second color points.
• the pattern of color points may include at least a third color point.
• the intermediate color points Pn may be aligned along two lines, one connecting the first color point and the third color point, and one connecting the third color point with the second color point.
• the color gradient light effect may thus comprise a plurality of gradients, such as 3, 4 or 5 gradients.
• a curved line 420' in the figure a circular line, between the first Pl and second color point P2, wherein the first color point and the second color point are the same and three intermediate color points Pn are mutually different and different from the first and second color point.
• FIG. 4 also shows the blackbody locus (BBL) as a dashed line.
• This BBL represents white light of different correlated color temperatures (CCTs).
• CCTs correlated color temperatures
• the LEDs 107 of the second array may be configured to emit white light W, that is light with a color corresponding to a point on the BBL.
• the white LEDs 107 may be configured to provide white light having a correlated color temperature in a range from 1800K to 6500K and a color rendering index of at least 80. Specifically, the white LEDs 107 may be configured to provide a variable white light. For example, the white LEDs 107 may be configured to provide a white light with a variable CCT. The controller 116 may be configured to control/vary the CCT of the second (white) light 109.
• the white LEDs 107 may comprise two types of white LEDs.
• a first type may be configured to provide white light with a first correlated color temperature
• a second type may be configured to provide white light with a second correlated color temperature.
• the second correlated color temperature may be at least lOOOK higher than the first correlated color temperature.
• the controller 116 may be configured to individually control an intensity of the light output of the first type of white LEDs and the second type of white LEDs. By adjusting a relative intensity between the first type of white LEDs and the second type of white LEDs, the controller 116 may control/vary the CCT of the second light.
• LED luminaires 500a, 500b, 500c having different types of stands or mounting elements, in accordance with some embodiments, will be described.
• FIG 5 is an illustration of three different LED luminaires 500a, 500b, 500c.
• Each of the three LED luminaires comprises a housing 515a, 515b, 515c comprising the first and second luminaire parts 101, 106, described above with reference to Figure 1.
• the housing may be at least in part formed by the first and second light exit windows 105, 110.
• the first LED luminaire 500a comprises a stand 512.
• the stand is arranged at the bottom end of the LED luminaire, to allow the LED luminaire 500a to stand (vertically) on e.g. a floor or a table.
• the stand 512 may comprise an orientation adjustment means, allowing the housing 515a to be rotated, around a longitudinal axis, relative to the stand 512.
• the second LED luminaire 500b comprises a mounting element 513 arranged near a midpoint of the LED luminaire 500b.
• the mounting element 513 may be arranged to mount the LED luminaire 500b parallel to a surface, such as a wall, a ceiling, or a floor.
• the mounting element 513 may comprise an orientation adjustment means, allowing the housing 515b to be rotated, around a longitudinal axis, relative to the mounting element 513, and thereby relative to the surface.
• the third LED luminaire 500c comprises two mounting elements 514 arranged at either end of the LED luminaire 500c.
• the mounting elements 514 may be arranged to mount the LED luminaire 500c parallel to a surface, such as a wall, a ceiling, or a floor.
• the mounting elements 514 may comprise an orientation adjustment means, allowing the housing 515c to be rotated, around a longitudinal axis, relative to the mounting element 514, and thereby relative to the surface.
• the stand 512, and any of the mounting elements 513, 514 may further comprise distance (position) adjustment means, for adjusting a position of the housing 515a, 515b, 515c relative to the stand 512, and any of the mounting elements 513, 514.
• the distance (position) adjustment means may adjust a distance between the housing 515a, 515b, 515c and the surface.
• FIG. 6 illustrates a LED luminaire 600.
• the LED luminaire 600 comprises a housing 615 and a stand 612.
• the stand 612 allows the LED luminaire 600 to stand vertically next to a wall 619.
• the stand 612 comprises a distance adjustment means in the form of a slit 618.
• the housing 615 may be slid inside the slit 618 to adjust a distance D between the housing 615 and the surface/wall 619.
• the stand further comprises orientation adjustment means allowing the housing 615 to be rotated around an axis A to adjust an orientation O of the LED luminaire 600.
• the LED luminaire 600 is oriented such that the first array is arranged facing the surface 619. Specifically, the LED luminaire 600 emits first light 104 towards the surface 619, and second light 109 away from the surface, e.g., into a room defined by the wall 619. The first light 104 may illuminate the wall 619. The first light 104 may provide a decorative color gradient light effect on the wall 619.
• a sensor 617 of the LED luminaire 600 may be coupled to the controller 616 of the LED luminaire 600.
• the sensor 617 may be configured to determine a distance and/or orientation of the first linear array of first LED light sources relative to the surface 619.
• the sensor 617 may be configured to determine, based on the orientation O of the housing 615 with respect to the stand 612, an orientation of the first linear array of first LED light sources relative to the surface 619.
• the sensor 617 may be configured to determine, based on the position of the housing 615 inside the slit 618, a distance D between the housing 615 and the surface 619. If the orientation O is also known, a distance between the first linear array of first LED light sources relative to the surface 619 may also be determined.
• the controller 616 may be configured to adapt the first light 104 and/or the second light 109 based on the distance D and/or the orientation O.
• the pattern of color points of the first light may be dependent on the distance D and/or the orientation O.
• the controller 616 may be configured to control the first array of LEDs to emit light with a higher intensity.
• the intensity of the first light may be adjustable in a range between a first level (corresponding to a shortest distance D) and a second level (corresponding to a longest distance D), based on the determined distance D.
• the pattern of color points of the first light 104 may be scaled dependent on the determined distance D.
• a shortest distance D may correspond to a first pattern of color points, such as the first color point Pl, the second color point P2 and the intermediate color point Pn, described with reference to Figures 1 and 4.
• a longest distance D may correspond to a second pattern of color points.
• the pattern of color points of the first light 104 may be adjustable in a range between the first pattern and the second pattern depending on the distance D. For example, in the first pattern, an average color point distance between the first color point Pl, the second color point P2 and the intermediate color points Pn may be shorter than in the second pattern.
• the pattern of color points of the first light may be dependent on the determined orientation O. For example, if the determined orientation O indicates that the first linear array of first LED light sources is directed away from the surface 619, the controller 616 may be configured to adapt the pattern of color points to decrease a color saturation (or increase the whiteness) of the first light. A level of desaturation (or whiteness) may be adjustable based on the orientation O.
• the controller 616 may be configured to control the first linear array of first LED light sources such that the first color point Pl, the second color point P2 and the intermediate color points Pn are arranged along, nearby (e.g., within a predefined distance of) or on the blackbody locus (BBL in Figure 4), such that the first light generates a color gradient light effect between white light of different CCTs.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Non-Portable Lighting Devices Or Systems Thereof (AREA)

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• 2024
  • 2024-01-09 EP EP24700254.6A patent/EP4649783A1/de active Pending
  • 2024-01-09 CN CN202480007451.XA patent/CN120530719A/zh active Pending
  • 2024-01-09 WO PCT/EP2024/050359 patent/WO2024149738A1/en not_active Ceased

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