CN111512088A

CN111512088A - Source-sensitive optical device with reconfigurable chip-on-board L ED array

Info

Publication number: CN111512088A
Application number: CN201880083988.9A
Authority: CN
Inventors: C.施拉马; V.D.卡卡; E.范卡萨利
Original assignee: Bright Sharp LLC
Current assignee: Bright Sharp LLC; Lumileds LLC
Priority date: 2017-10-25
Filing date: 2018-10-25
Publication date: 2020-08-07
Also published as: KR20200087777A; JP2021501443A; KR102405185B1; TW201930779A; EP3701182A1; WO2019084247A1; TWI761618B

Abstract

A source-sensitive optical device is described herein that uses a reconfigurable chip-on-board (CoB) light emitting diode (L ED) array as a light source in an embodiment, the reconfigurable CoB L ED array includes a predetermined number L ED. configurable for a variety of illumination scenarios in an embodiment, the reconfigurable CoB L ED array is a plurality of CoB L ED arrays configured for use with the source-sensitive optical device described herein.

Description

Source-sensitive optical device with reconfigurable chip-on-board L ED array

Technical Field

This application relates to chip-on-board light emitting diode based lighting.

Background

A L ED-based luminaire or luminaire is used for interior and exterior applications, such as, for example, street lighting, in particular, a chip-on-board (CoB) L ED array provides high brightness and is generated in conjunction with narrow beam light to provide tight focus/low geometric spreading of illumination.

Optical elements or structures are used with the CoB L ED array to facilitate focusing of the generated light to create a narrow beam of collimated or quasi-collimated light.

As shown in FIG. 1, street lighting based on a traditional CoB L ED array uses free-form optics as optical elements or lenses to spread light onto a road in a particular pattern, the free-form optics depends on the street or road type (freeway, city, pedestrian, etc.) and applicable regional standards.

Disclosure of Invention

A source-sensitive optic is described herein that uses a reconfigurable chip-on-board (CoB) light emitting diode (L ED) array as a light source in an embodiment, the reconfigurable CoB L ED array includes a predetermined number L ED. configurable for a variety of illumination scenarios in an embodiment, the reconfigurable CoB L ED array is a plurality of CoB L ED arrays configured for use with a source-sensitive optic as described herein.

Drawings

A more detailed understanding can be obtained from the following description, given by way of example, in conjunction with the accompanying drawings, in which:

FIG. 1 is a free-form illustration of conventional LED lighting;

FIG. 2 is an illustrative lighting system in accordance with certain embodiments;

FIG. 3 is an illustrative CoB L ED array having type I, type II, and type III light source configurations for use in source-sensitive optics as shown in FIG. 7, in accordance with certain embodiments;

FIG. 4 is an illustrative wire-frame diagram of a type I light source in a source-sensitive optic in accordance with certain embodiments;

FIG. 5 is an illustrative wire-frame diagram of a type II light source in a source-sensitive optic in accordance with certain embodiments;

FIG. 6 is an illustrative wire-frame diagram of a type III light source in a source-sensitive optic in accordance with certain embodiments;

FIG. 7 is an illustrative source-sensitive optic in accordance with certain embodiments;

FIG. 8 is an illustrative cross-section of source-sensitive optics for the light source of FIG. 3 in accordance with certain embodiments;

FIG. 9 is another illustrative cross-section of the source-sensitive optic of FIG. 4 in accordance with certain embodiments;

10A-10C are beam profiles of I, II and a type III illumination source, in accordance with certain embodiments;

11A-11C are luminance flux characteristics of I, II and a type III illumination source, in accordance with certain embodiments;

12A-12C are graphs of the luminous intensity of I, II and a type III illumination source, in accordance with certain embodiments; and

fig. 13 is a flow chart for manufacturing a lighting fixture, in accordance with some embodiments.

Detailed Description

It is to be understood that the figures and descriptions for using source-sensitive optics with a reconfigurable chip-on-board (CoB) light emitting diode (L ED) array as a light source have been simplified to illustrate elements that are relevant for a clear understanding while eliminating, for purposes of clarity, many other elements found in typical lighting systems and devices.

10A-10C, 11A-11C, and 12A-12C provide illustrative illumination characteristics, features, or parameters.

Reconfigurable CoB L ED arrays include a predetermined number L ED. of source-sensitive optics configurable for a variety of lighting scenarios configured to provide beam profile and radiation pattern differences based on the CoB L ED array configuration configured by reconfigurable CoB L ED each configurable CoB L ED array configuration radiates a different beam pattern via surface shape due to proximity and surface shape geometry.

In another embodiment, a reconfigurable CoB L ED array may include or refer to a plurality of non-configurable CoB L ED arrays configured for use with source-sensitive optics as described herein, that is, a reconfigurable CoB L ED array may include a plurality of individual CoB products having a particular L ED arrangement or configuration.

Fig. 2 is an illustrative lighting system 200 in accordance with certain embodiments the lighting system 200 includes a luminaire 205, the luminaire 205 including a reconfigurable CoB L ED array 210 configured with active-sensitive optics 215 the reconfigurable CoB L ED array 210 is in communication with or connected to (collectively "connected to") a controller 220, the controller 220 in turn connected to a user interface 225 or a vendor interface 230 to configure the reconfigurable CoB L ED array 210 the shape and configuration of the reconfigurable CoB L ED array 210 and the source-sensitive optics 215 are illustrative and depend on a given lighting environment as described herein below.

In operation, a user or vendor selects source-sensitive optics 215 and reconfigurable CoB L ED array 210 for use in the lighting environment in an embodiment, the user and vendor may then use user interface 225 or vendor interface 230, respectively, to select and provide configuration information to controller 220, which controller 220 in turn configures reconfigurable CoB L ED array 210 to provide the requested lighting for the lighting environment as described herein below.

Reconfigurable CoB L ED array 210 should be understood to include any electroluminescent diode or other type of carrier injection/junction-based system capable of generating radiation in response to an electrical signal reconfigurable CoB L ED array 210 includes, but is not limited to, semiconductor-based structures, light emitting polymers, organic light emitting diodes (O L ED), electroluminescent strips, etc. that emit light in response to electrical current reconfigurable CoB L ED array 210 may include multiple dies or chips (collectively chips) that may be connected in parallel or in series.

As described herein below with respect to FIG. 3, a given shape of a reconfigurable CoB L ED array 210 may be controlled or configured to have different sub-shapes to provide different illumination and/or radiation patterns.

Reconfigurable CoB L ED array 210 may be configured to generate broad spectrum radiation including infrared, ultraviolet, visible, and other regions of the entire electromagnetic spectrum.reconfigurable CoB L ED array 210 may be configured and/or controlled to generate radiation of various bandwidths (e.g., narrow bandwidths, wide bandwidths) with a given spectrum.

The source-sensitive optics 215 are configured to provide beam profile and radiation pattern differences based on the different surface shapes and the interaction of each surface shape with a given configuration of the reconfigurable CoB L ED array 210 the surface shapes are optimized to meet the different environmental and lighting scenarios using the different L ED configurations available from the reconfigurable CoB L ED array 210 in an embodiment, the source-sensitive optics 215 are molded from Polymethylmethacrylate (PMMA), polycarbonate, glass, or any other similar material.

The controller 220 may be implemented in a variety of ways (e.g., such as with dedicated hardware) to perform the various functions discussed herein, for example, the controller 220 may be a processor employing one or more microprocessors that may be programmed using software (e.g., microcode) to perform the various functions discussed herein the controller 220 may be implemented with or without a processor, and may also be implemented as a combination of dedicated hardware to perform certain functions and a processor performing other functions (e.g., one or more programmed microprocessors and associated circuitry).

In various embodiments, a processor or controller may be associated with one or more storage media (generally referred to herein as "memory," e.g., volatile and non-volatile computer memory such as RAM, PROM, EPROM, and EEPROM, floppy disks, compact disks, optical disks, magnetic tape, etc.). In some embodiments, the storage medium may be encoded with one or more programs that, when executed on one or more processors and/or controllers, perform at least some of the functions discussed herein. Various storage media may be fixed within a processor or controller or may be removable such that the program or programs stored thereon may be loaded into the processor or controller to implement various aspects of the present disclosure discussed herein. The terms "program" or "computer program" are used herein in a generic sense to refer to any type of computer code (e.g., software or microcode) that can be employed to program one or more processors or controllers.

User interface 225 and/or provider interface 230 may refer to an interface between a human user or operator and controller 220 to configure reconfigurable CoB L ED array 210 user interface 225 and/or provider interface 230 may be, but is not limited to, switches, potentiometers, buttons, dials, sliders, mice, keyboards, keypads, various types of game controllers (e.g., joysticks), trackballs, display screens, various types of Graphical User Interfaces (GUIs), touch screens, microphones, and other types of sensors that may receive some form of human-generated stimulus and generate signals in response thereto.

FIG. 3 is an illustrative reconfigurable CoB L ED array 300 with type I, type II, and type III light source configurations for use with source-sensitive optics (such as, for example, source-sensitive optics 705 of FIG. 7. in an example embodiment, the type I light source configuration may be a 3 × mm array emitting 2000 lumens (lm), the type II light source configuration may be a 3 × mm array emitting 4000lm, the type III light source configuration may be a 3 ×.6 mm array emitting 6000 lm. the type I light source configuration emits narrow beams and each successively larger light source emits a wider beam.

In the embodiment of reconfigurable CoB L ED array 300 of FIG. 3, a type III light source configuration may be used as the base configuration from which other configurations may be implemented, such as type I and type II configurations, as shown on the type III configuration, with examples X, Y and Z indications on the type III configuration the type I and type II configurations are configured relative to X, Y and Z axis indications.

Type I, type II and type III related configurations are illustrated with respect to fig. 4-6. Fig. 4 is an illustrative wire frame diagram of a type I light source 400 in source sensitive optics 405. Fig. 5 is an illustrative wire frame diagram of a type II light source 500 in source sensitive optics 405. Fig. 6 is an illustrative wire frame diagram of a type III light source 600 in source sensitive optics 405. In one embodiment, type I light sources 400 and type II light sources 500 are a subset of type III light sources 600 along the Y-axis. Generally, each of the type I, type II, and type III related configurations may be used with the source-sensitive optics 405.

FIG. 7 is an illustrative lighting fixture 700 including source-sensitive optics 705 and a CoB L ED array 710 mounted on a mounting plate 715. in an embodiment, source-sensitive optics 705 is mounted after CoB L ED array 710 is mounted on mounting plate 715. Source-sensitive optics 705 is configured to provide different beam profiles and radiation patterns based on the different shapes and configurations of CoB L ED array 710. A controller, such as, for example, controller 220, may be used to configure CoB L ED array 710 as appropriate. in an embodiment, if CoB L ED array 710 includes a plurality of non-configurable CoB L ED arrays as described herein, a controller is not required. FIG. 8 is an illustrative cross-section of fixture 700 taken along the X-Z axis. FIG. 9 is an illustrative cross-section of fixture 700 taken along the Y-Z axis.

10A-10C illustrate beam patterns for type I, type II, and type III illumination source configurations, in accordance with certain embodiments. As illustrated, the type I illumination source has a narrow beam profile centered at 20 degrees (along 90 ° H, which means along the width of the roadway), while the type II and III illumination sources have a wider beam profile. 11A-11C illustrate illuminance and brightness profiles on example roadway configurations for type I, type II, and type III illumination source configurations, in accordance with certain embodiments. 12A-12C illustrate luminous intensity plots for type I, type II, and type III illumination source configurations, in accordance with certain embodiments. Fig. 12A-12C demonstrate that the maximum intensity (maximum Cd point) of the three distributions is changing, and that 50% of the maximum Cd point (see the iso-curve) is widening (as indicated, especially along the street side) as the shape of the CoB changes. When using, for example, type I to type III illumination source configurations, respectively, the beam profile is widening from fig. 12A to 12C.

Fig. 13 is a flow chart 1300 for manufacturing a lighting fixture, in accordance with certain embodiments, a reconfigurable CoB L ED array is made of a plurality of L EDs in predetermined shapes and sizes (1305), source sensitive optics are manufactured by first changing a plurality of surface shapes in response to different CoB L ED array configurations of the reconfigurable CoB L ED array (1310), in an embodiment, the reconfigurable CoB L ED array is a plurality of non-configurable CoB L ED arrays, and the source sensitive optics are manufactured by changing a plurality of surface shapes in response to each non-configurable CoB L ED array configuration, a plurality of surface shapes are optimized with respect to a predetermined set of lighting thresholds (1315), the predetermined lighting thresholds may include, but are not limited to, beam profile, radiation pattern, luminous flux, luminous intensity, color, and beam width.

The embodiments described herein may be incorporated into any suitable light emitting device. Embodiments of the invention are not limited to the specific structures illustrated, such as, for example, the systems and devices of fig. 2-9.

The embodiments and variations described herein and/or shown in the drawings are presented by way of example only and are not limiting as to scope and spirit.

In general, a lighting fixture includes a reconfigurable chip-on-board (CoB) light emitting diode (L ED) array and a source-sensitive optic comprising a plurality of surface shapes that provide different beam profiles and radiation patterns based on the plurality of surface shapes in combination with different CoB L0 ED array configurations available from a reconfigurable CoB L ED array.

Generally, a method for manufacturing a lighting fixture includes providing a reconfigurable chip-on-board (CoB) light emitting diode (L ED) array, and providing a source-sensitive optical device including a plurality of surface shapes, the source-sensitive optical device providing different beam profiles and radiation patterns based on the plurality of surface shapes in combination with different CoB L ED array configurations available from a reconfigurable CoB L ED array.

As described herein, the methods described herein are not limited to any particular element(s) performing any particular function(s), and certain steps of the presented methods do not necessarily occur in the order shown.

Some features of some embodiments may be omitted or implemented in other embodiments. The device elements and method elements described herein may be interchangeable and may be used or omitted from any of the examples or embodiments described herein.

Although the features and elements are described above in particular combinations, each feature or element can be used alone without the other features and elements or in various combinations with or without other features and elements.

Claims

1. A lighting fixture, comprising:

a chip-on-board (CoB) light emitting diode (L ED) array having a L ED configuration selected from a plurality of L ED configurations, and

an optic comprising a plurality of surface shapes, the optic providing different beam profiles and radiation patterns based on the plurality of surface shapes and the L ED configuration selected from the plurality L ED configurations.

2. The lighting fixture of claim 1, wherein the CoB L ED array comprises a plurality L ED, the plurality L ED being individually addressable and selectable via a controller.

3. The lighting fixture of claim 2, said optics being at least one of free-form, refractive, fresnel, and reflective optics.

4. The lighting fixture of claim 3, said optics being molded from at least one of Polymethylmethacrylate (PMMA), polycarbonate, and glass.

5. The lighting fixture of claim 1, wherein at least one of said plurality of surface shapes has a different surface shape.

6. The lighting fixture of claim 5, wherein at least one of the plurality of surface shapes has a different geometric relationship to at least one L ED of the CoB L ED array.

7. The lighting fixture of claim 1, wherein the CoB L ED arrays comprise a plurality of CoB L ED arrays, each CoB L ED array of the plurality of CoB L ED arrays having a predetermined shape and size.

8. The lighting fixture of claim 1, wherein each L ED configuration of the plurality of L ED configurations of the CoB L ED array is a CoB L ED array having a predetermined shape and size.

9. The lighting fixture of claim 1, wherein the different beam profiles and radiation patterns vary according to at least one of luminous flux, luminous intensity, color, and beam width.

10. A method of manufacturing a lighting fixture, comprising:

providing a chip-on-board (CoB) light emitting diode (L ED) array having a L ED configuration selected from a plurality of L ED configurations;

providing an optic comprising a plurality of surface shapes that provide different beam profiles and radiation patterns based on the plurality of surface shapes and the L ED configuration selected from the plurality of L ED configurations, and

coupling the CoB L ED array and the optics to form the lighting fixture.

11. The method of claim 10, wherein the providing optics further comprises:

changing the plurality of surface shapes;

optimizing the plurality of surface shapes with respect to a predetermined set of illumination thresholds; and

forming the optical device from the plurality of surface shapes.

12. The method of claim 10, wherein the providing a CoB L ED array further comprises:

the CoB L ED array is formed from a plurality of individually addressable and selectable L EDs.

13. The method of claim 10, wherein the CoB L ED arrays include a plurality of CoB L ED arrays, each CoB L ED array of the plurality of CoB L ED arrays having a predetermined shape and size.

14. The method of claim 10, wherein each L ED configuration of the plurality of L ED configurations of the CoB array is a CoB L ED array having a predetermined shape and size.

15. The method of claim 12, the providing an optical device further comprising:

the optical device is implemented using at least one of free-form, refractive, fresnel, and reflective optical devices.

16. The method of claim 15, wherein the providing optics further comprises:

the optical device is molded from at least one of Polymethylmethacrylate (PMMA), plastic, polycarbonate, and glass.

17. The method of claim 11, wherein at least one of the plurality of surface shapes has a different surface shape.

18. The method of claim 11, wherein at least one of the plurality of surface shapes has a different geometric relationship to at least one L ED of the CoB L ED array.