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JP-2026514239-A - Lighting configuration

JP2026514239AJP 2026514239 AJP2026514239 AJP 2026514239AJP-2026514239-A

Abstract

The lighting configuration includes a cup with walls defining a light output aperture, and a plurality of LED light sources arranged within the cup. The lighting configuration further includes a plurality of lenses, each positioned adjacent to its respective LED light source and positioned to direct the LED light emitted by its respective LED light source through the light output aperture of the cup. The plurality of lenses are arranged on a lens plate, with walls positioned to protrude from the lens plate, and each lens is separated from each other by sections of the walls.

Inventors

  • デ ベスト アンナ ヴィルヘルミナ マリア
  • ベルトマン レネー
  • ヴィッセンベルフ ミシェル コルネリス ヨセフス マリー
  • デ フリース ヘンリクス ヨハン アドリー

Assignees

  • シグニファイ ホールディング ビー ヴィ

Dates

Publication Date
20260507
Application Date
20240418
Priority Date
20230504

Claims (15)

  1. A lighting configuration for providing downward overhead illumination, the lighting configuration is: A cup including a wall that defines the light output aperture, Multiple light-emitting diode (LED) light sources are arranged inside the cup, Multiple lenses, each lens positioned adjacent to its respective LED light source, and arranged to direct the LED light emitted by its respective LED light source through the light output aperture of the cup, A lens plate on which the aforementioned plurality of lenses are arranged, A wall positioned to protrude from the lens plate, wherein each lens is positioned so as to be separated from each other by a section of the wall, Includes, The aforementioned wall has optical properties that cause a change in the direction of LED light through reflection, refraction, or scattering. The aforementioned wall is a lighting configuration having a top side with multiple protrusions or projections.
  2. The lighting configuration according to claim 1, wherein the plurality of protrusions or projections form a serrated profile.
  3. The illumination configuration according to claim 1 or 2, wherein the plurality of protrusions or projections provided on the top side of the wall have amplitude and spacing, and the amplitude and/or spacing is smaller than the dimensions of the lens.
  4. Each lens protrudes from the lens plate by a lens height, The aforementioned wall protrudes from the lens plate to a maximum wall height, The lighting configuration according to any one of claims 1 to 3, wherein the maximum wall height is less than or equal to the lens height.
  5. Each lens protrudes from the lens plate by a lens height, The aforementioned wall protrudes from the lens plate to a maximum wall height, The lighting configuration according to any one of claims 1 to 3, wherein the maximum wall height is equal to or greater than the lens height.
  6. The lighting configuration according to any one of claims 1 to 5, wherein the lens plate, the plurality of lenses, and the wall form a single integrated unit.
  7. The number of LEDs in the aforementioned plurality of LED light sources is 2 to 9. The number of lenses in the aforementioned plurality of lenses is 2 to 9. The lighting configuration according to any one of claims 1 to 6, wherein the pitch between each LED is 1 to 4 times the width of each LED.
  8. At least one lens is configured to direct LED light according to at least one C-plane intensity profile, Each C-plane intensity profile includes a primary intensity peak at the first gamma (γ) angular interval between γ1 and γ2 , where γ2 is greater than γ1 . The lighting configuration according to any one of claims 1 to 7, wherein each C-plane intensity profile includes a secondary intensity shoulder or peak at a second γ-angle interval between γ3 and γ4 at an intensity lower than the intensity of the primary intensity peak, and γ3 is greater than γ2 , γ4 is greater than γ3 , and γ4 is 180° or less.
  9. The lighting configuration is, LED light directed by the at least one lens at the first γ angular interval exits the light output aperture of the cup without hitting the walls of the cup, and LED light directed by the at least one lens at the second γ angular interval hits the walls of the cup before exiting the light output aperture of the cup. The lighting configuration according to claim 8, configured as described above.
  10. The at least one lens includes a base portion and a top portion, The top portion is configured to direct the LED light to the first γ angular interval, The lighting configuration according to claim 8 or 9, wherein the base portion is configured to direct LED light to the second γ angular interval.
  11. The at least one lens includes a base portion and a top portion, The top portion is configured to direct the LED light to the second γ angular interval, The lighting configuration according to claim 8 or 9, wherein the base portion is configured to direct LED light to the first γ angular interval.
  12. The first γ angular interval is between γ1 = 0° and γ2 = 55°, The lighting configuration according to any one of claims 8 to 11, wherein the second γ angular interval is between γ3 = 60° and γ4 = 90°.
  13. The lighting configuration according to any one of claims 1 to 12, wherein the wall of the cup is white.
  14. The light output aperture of the cup is Circle, ellipse, oval, polygon, Leaf shape, or any combination of the above, A lighting configuration according to any one of claims 1 to 12, having a contour that is the shape of the above.
  15. A lighting fixture comprising multiple lighting configurations described in any one of claims 1 to 14.

Description

This invention generally relates to lighting configurations. More specifically, it relates to lighting configurations for providing downward overhead illumination and lighting fixtures including such lighting configurations. Lighting fixtures for illuminating environments such as offices should provide appropriate luminous flux and intensity distribution to give sufficient illuminance levels to work surfaces (e.g., an average of 300 lux, with uniformity of E max /E average < 2). At the same time, the Unified Glare Rating (UGR) must be below the specified target. In the United States, UGR < 22 is the norm, while in Europe, the specification is often UGR < 19. From a sustainability perspective, as well as from an overall cost reduction perspective, there is a strong demand to reduce energy consumption and material use. Energy consumption can be reduced by increasing the efficiency of lighting fixtures or by increasing the efficiency of providing task illuminance (i.e., bringing light where it is needed). Material use and overall cost reduction can be achieved by reducing the number of lighting fixtures required to illuminate the environment, in other words, by increasing the luminaire spacing in a room. Standard luminaire spacing ranges from 1.80 to 3.0 meters in Europe and 8 to 10 feet in the United States, and is typically constrained by glare requirements, uniformity requirements, and task illuminance requirements. Thus, as luminaire spacing increases, the luminous flux per luminaire must be increased to meet the work surface illumination requirements. Furthermore, to achieve the uniformity requirement when luminaire spacing is wide, each luminaire needs to have a wider beam to cover this wider area. However, both higher luminous flux and wider beams risk negatively impacting glare perception and increasing UGR to an unacceptable level. Conventional luminaires have been found unable to meet these illuminance, uniformity, and UGR requirements when luminaire spacing exceeds 3 meters. Herein, this and other aspects of the present invention will be described in more detail with reference to the accompanying drawings illustrating (multiple) embodiments of the present invention. Figure 1a schematically shows a perspective view of a lighting configuration that forms part of a lighting fixture, Figure 1b schematically shows a cross-sectional view of a lighting configuration having one LED and one lens, Figure 1c schematically shows the intensity profile, and Figure 1d schematically shows a side view of the lens. Figure 2a schematically shows a cross-sectional view of a lighting configuration having multiple LEDs and lenses, Figure 2b is a detailed view of the lighting configuration schematically shown in Figure 2a, and Figures 2c and 2d schematically show perspective views of the lighting configuration having multiple LEDs and lenses. A schematic side view of a lighting fixture that provides downward overhead illumination is shown. Referring to Figures 1a-1d and Figure 3, the lighting configuration 100 for providing downward overhead illumination includes a cup 101 with a wall 102 defining a light output aperture 103. At least one LED light source 104 is positioned on a printed circuit board (PCB) within the cup 101, and at least one lens 105 is positioned adjacent to the LED light source 104 and is configured to direct the LED light 106 emitted by the LED light source 104 through the light output aperture 103 of the directional cup 101. At least one lens 105 is configured to direct the LED light 106 according to at least one C-plane intensity profile 130a, 130b. Two such intensity profiles 130a, 130b are illustrated in the diagram of Figure 1c. Each C-plane intensity profile 130a, 130b includes a primary intensity peak 131 at a first gamma (γ) angular interval between γ1 and γ2 , where γ2 is greater than γ1 . Each C-plane intensity profile 130a, 130b includes a secondary intensity shoulder or peak 132 at a second γ angular interval between γ3 and γ4 at an intensity lower than the primary intensity peak 131, where γ3 is greater than γ2 , γ4 is greater than γ3 , and γ4 is 180° or less. As shown in Figures 1a and 1b, the γ angle is the angle of LED light emission from the lens 105 relative to the principal light direction 110, which is downward in the context of this specification. The γ angle can have a value between 0° and 180°. The C plane is defined such that the principal light direction 110 lies in the C plane, and the C plane can have a rotation angle of 0° to 360° around the principal light direction 110. LED light 106 directed by at least one lens 105 at the first γ-angle interval exits the light output aperture 103 of the cup 101 without hitting the wall 102 of the cup 101. LED light 106 directed by at least one lens 105 at the second γ-angle interval hits the wall 102 of the cup 101 before exiting the light output aperture 103 of the cup 101. In Figure 1b, this is indicated by the cutoff γ angle 111. The