WO2023156503A1

WO2023156503A1 - Leds with silicone potting

Info

Publication number: WO2023156503A1
Application number: PCT/EP2023/053841
Authority: WO
Inventors: John William SCHACH; Luke Matthew STEWART; Eric GAIGNARD
Original assignee: Signify Holding B.V.
Priority date: 2022-02-21
Filing date: 2023-02-16
Publication date: 2023-08-24

Abstract

An edge-lit lighting assembly including a housing, LEDs, a silicone potting layer, a light guide plate, and a cover plate is provided. The LEDs are mounted to the housing. The silicone potting layer is deposited on the LEDs via silicone injection ports in the cover plate. The reflector is arranged to reflect light generated by the LEDs. The light guide plate is arranged to distribute light generated by the LEDs. The silicone potting layer is adjacent to the light guide plate. Further, a light source is provided. The light source includes a blue die LED emitting blue light, a silicone potting layer including phosphors, and an optic. The silicone potting layer is deposited on the blue die LED. The phosphors convert the blue light to white light. The optic forms a cavity around the blue die LED. The silicone potting layer substantially fills the optic.

Description

LEDS WITH SILICONE POTTING

FIELD OF THE DISCLOSURE

The present disclosure is directed generally to layering silicone potting on light-emitting diodes (LEDs).

BACKGROUND

Edge-lit lighting assemblies include a plurality of light emitting diodes (LEDs) arranged around the edge of a housing. The LEDs generate light directed towards the interior of the edge-lit lighting assembly. The light passes through a light guide plate to distribute the light according to a desired path. The light is then reflected downward by a reflector arranged immediately above the light guide plate. For the light emitted by an LED to enter the light guide plate, the light must pass through an air gap between the LED and the light guide plate. The changes in refractive index from the LED to the air gap to the light guide plate introduce inefficiencies in terms of lighting output. In some cases, these inefficiencies result in an optical loss of up to 30 percent. Further, the air gap potentially exposes the LED to water, dust, and other environmental elements.

Further, the edge-lit lighting assemblies, and many other types of lighting assemblies, typically produce white light. The most common LEDs are blue die LEDs emitting blue light. White light is then achieved by embedding phosphor into an optic arranged around the blue die LED. The color temperature of the white light depends on the embedded phosphor. Lighting assembly manufactures are then required to purchase LEDs with the embedded phosphor optic for generating the desired color temperature, limiting flexibility and customization during assembly. Accordingly, there is a need in the art for reducing the inefficiencies and exposures of the air gap of edge-lit lighting assemblies, as well as customizing the color temperature of the light emitted by LEDs.

SUMMARY OF THE DISCLOSURE

The present disclosure is directed to layering silicone potting on light-emitting diodes (LEDs). In one aspect, a plurality of LEDs are mounted to an edge-lit lighting housing to form an edge-lit lighting assembly. A light guide plate is arranged in the edge-lit lighting housing proximate to the plurality of LEDs, thereby forming an air gap between each of the plurality of LEDs and the light guide plate. A silicone potting layer is deposited on each of the plurality of LEDs, filling each air gap. The silicone potting layer increases efficiency by optically coupling the LED directly to the light guide plate. Once the light emitted by the LEDs travels through the silicone potting layer into the light guide plate, the light guide plate distributes the light according to a desired path. A reflector positioned above the light guide plate then reflects the light downward such that the edge-lit lighting assembly may light an area directly below the assembly.

In another aspect, a silicone potting layer is deposited onto a blue die LED configured to generate blue light. The silicone potting layer includes phosphor elements configured to convert the blue light to white light. The recipe of the silicone potting layer and the phosphor elements is determined to generate white light of a desired color temperature. Further, an optic is arranged about the blue die LED, forming a cavity around the blue die LED. As with the edge-lit lighting assembly example, the silicone potting layer fills the cavity to improve efficiency of the light emitting from the LED, through the silicone potting layer, and out of the optic.

Generally, in one aspect, an edge-lit lighting assembly is provided. The edge- lit lighting assembly includes an edge-lit lighting housing.

The edge-lit lighting assembly further includes a plurality of LEDs. The plurality of LEDs are mounted to the edge-lit lighting housing. Each of the LEDs may be vertically mounted. Each of the LEDs may be mounted to the edge-lit lighting housing via flexible tape.

The edge-lit lighting assembly further includes a silicone potting layer. The silicone potting layer is deposited on each of the plurality of LEDs. The silicone potting layer may be configured to emit light generated by the plurality of LEDs. Further, the silicone potting layer may be insoluble. According to an example, at least one of the LEDs is a blue die LED. The blue die LED is configured to emit blue light. In this example, at least a portion of the silicone potting layer includes phosphors. The phosphors are configured to convert the blue light to white light.

According to an example, the edge-lit lighting assembly further includes one or more silicone injection ports. The one or more silicone injection ports are arranged in a cover plate. The cover plate is positioned above at least one of the plurality of LEDs. Further to this example, at least one of the one or more silicone injection ports may be configured to convey at least a portion of the silicone potting layer to at least one of the plurality of LEDs. According to an example, the edge lit-lighting assembly further includes a reflector. The reflector is arranged to reflect light generated by the LEDs.

According to an example, the edge lit-lighting assembly may further include a light guide plate. The light guide plate is arranged to distribute light generated by the plurality of LEDs. The silicone potting layer may be adjacent to the light guide plate.

Generally, in another aspect, a light source is provided. The light source includes a blue die LED. The blue die LED is configured to emit blue light.

The light source further includes a silicone potting layer. The silicone potting layer is deposited on the blue die LED. The silicone potting layer includes phosphors. The phosphors are configured to convert the blue light to white light. In one example, the blue die LED is mounted to an edge-lit lighting assembly.

According to an example, the light source further includes an optic. The optic forms a cavity around the blue die LED. The silicone potting layer may substantially fill the optic.

It should be appreciated that all combinations of the foregoing concepts and additional concepts discussed in greater detail below (provided such concepts are not mutually inconsistent) are contemplated as being part of the inventive subject matter disclosed herein. In particular, all combinations of claimed subject matter appearing at the end of this disclosure are contemplated as being part of the inventive subject matter disclosed herein. It should also be appreciated that terminology explicitly employed herein that also may appear in any disclosure incorporated by reference should be accorded a meaning most consistent with the particular concepts disclosed herein.

These and other aspects of the various embodiments will be apparent from and elucidated with reference to the embodiment s) described hereinafter.

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawings, like reference characters generally refer to the same parts throughout the different views. Also, the drawings are not necessarily to scale, emphasis instead generally being placed upon illustrating the principles of the various embodiments.

FIG. 1 is an exploded view of an edge-lit lighting assembly, in accordance with an example.

FIG. 2 is a simplified cross-sectional view of an edge-lit assembly, in accordance with an example. FIG. 3 is a detailed cross-sectional view of an edge-lit assembly, in accordance with an example.

FIG. 4 is a cross-sectional view of a light-emitting diode (LED) arranged in an optic, in accordance with an example.

FIG. 5 is a cross-sectional view of an LED arranged in an optic filled with a silicone potting layer, in accordance with an example.

FIG. 6 is an isometric view of an LED arranged in an optic filled with a silicone potting layer, in accordance with an example.

FIG. 7 is a simplified cross-sectional view of an edge-lit assembly, in accordance with a further example.

DETAILED DESCRIPTION OF EMBODIMENTS

The present disclosure is directed to layering silicone potting on light-emitting diodes (LEDs). In one aspect, a plurality of LEDs are mounted to an edge-lit lighting housing to form an edge-lit lighting assembly. The LEDs may be low-power, medium-power, or high- power, depending on the application. The LEDs are vertically mounted to an interior edge of a circular edge-lit lighting assembly, such that the LEDs emit light towards a center of the edge-lit lighting assembly. The LEDs may be mounted using flexible tape or any other appropriate means. A light guide plate is arranged in the edge-lit lighting housing proximate to the plurality of LEDs, thereby forming an air gap between each of the plurality of LEDs and the light guide plate. The light guide plate may be a type of plastic, such as polymethyl methacrylate (PMMA), and have a refractive index of 1.48. Alternatively, the light guide plate may be polycarbonate (PC), and have a refractive index of 1.52.

A silicone potting layer is deposited on each of the plurality of LEDs, thereby filling each air gap. The silicone potting layer may comprise an insoluble, viscous optical silicone gel having a refractive index close to or substantially equal to the refractive index of the light guide plate. The silicone potting layer optically couples the LED directly to the light guide plate, increasing light transmission efficiency by reducing losses regarding physical distance, differences in refractive index, and light leaks. The silicone potting layer also protects the LED from water, dust, and other environmental elements. Once the light emitted by the LEDs travels through the silicone potting layer into the light guide plate, the light guide plate distributes the light according to a desired light path. A reflector positioned above the light guide plate then reflects the light downward such that the edge-lit lighting assembly may illuminate an area directly below the edge-lit lighting assembly. This increased efficiency may result in a reduction in the number of LEDs and/or power required to generate the desired lighting output.

The edge-lit lighting assembly may include a cover plate arranged above the LEDs. The cover plate may include one or more silicone injection ports. During assembly, the silicone potting layer may be deposited on the plurality of LEDs through the one or more silicone injection ports via low pressure injection molding. Any appropriate number of silicone injection ports may be used to effectively fill the air gaps between each of the plurality of LEDs and the light guide plate with the silicone potting layer. The edge-lit lighting assembly may also include a gasket arranged between the edge-lit lighting housing and a lower edge of the light guide plate. The gasket both prevents water from leaking into edge-lit lighting assembly, and prevents the silicone potting layer from leaking out of the edge-lit lighting assembly.

In another aspect, a silicone potting layer is deposited onto a blue die LED configured to generate blue light. The silicone potting layer includes phosphor elements configured to convert the blue light to white light. The recipe of the silicone potting layer and the phosphor elements is determined to generate white light of the desired color temperature. Further, an optic is arranged about the blue die LED, forming a cavity around the blue die LED. As with the edge-lit lighting assembly example, the silicone potting layer fills the cavity to improve transmission efficiency of the light emitting from the LED, through the silicone potting layer, and out of the optic. In this example, the silicone potting layer has a refractive index substantially equal to a refractive index of the optic. While this light source may be used in the edge-lit lighting assembly described above, it may also be used in a wide array of configurations, such as a discrete light source, arranged in a downlight, or arranged on various substrates, such as a printed circuit board (PCB), metal core printed circuit board (MCPCB), or flexible tape. Using a silicone potting layer with phosphor provides greater configurability and flexibility when designing light sources for a particular color temperature. Further, directly coupling the light emitted by the LED to the optic increases the efficiency of the output light.

FIG. 1 is an exploded view of an edge-lit lighting assembly 10. The edge-lit lighting assembly includes a cover plate 102, a reflector 108, a light guide plate 110, a driver assembly 112, a driver cable 114, a flexible tape 106, and a housing 102. Generally, the edge- lit lighting assembly 10 uses a plurality of LEDs 200 to generate light 202 (as shown in FIG. 2). The LEDs 200 face inwards, such that, in the example of a circular edge-lit lighting assembly 10, the generated light 200 travels towards the center of the edge-lit lighting assembly 10. The light 202 is distributed by the light guide plate 110 and reflected downwards via the reflector 108. In this way, the edge-lit lighting assembly 10 may be used to illuminate the area below, such as a ceiling-mounted overhead light in an indoor space.

The flexible tape 106 shown in FIG. 1 includes the plurality of LEDs 200. The flexible tape 106 may be a flexible printed circuit board (FPCB). The flexible tape 106 may include an adhesive surface opposite of the LEDs 200 to mount the flexible tape 106 to another surface, such as a surface of the edge-lit lighting housing 100. While, for simplicity, FIG. 1 only depicts the LEDs 200 affixed to a portion of the flexible tape 116, it should be understood that in many situations the array of LEDs 200 will cover an entire interior surface of the flexible tape 116.

Further, in the example of FIG. 1, the LEDs 200 are vertically mounted to the flexible tape 106. Once the flexible tape 106 is mounted on the edge-lit lighting housing 100, the LEDs 200 emit light 202 towards the center of the edge-lit lighting assembly 10. The light 202 generated by the LEDs 200 is controlled by the driver assembly 112. The driver assembly 112 includes circuitry to provide the flexible tape 106 with power to illuminate the LEDs 200. The driver assembly 112 may be electrically coupled to the flexible tape 106 via driver cable 114. The driver assembly 112 may include control circuitry which may dictate the supply of power to the LEDs 200.

The driver assembly 112, the reflector 108, and the light guide plate 110 are arranged within the edge-lit lighting housing 100. The arrangement of the reflector 108 and light guide plate 110 is shown in more detail in FIGS. 2 and 3. The cover plate 102 is then arranged over the driver assembly 112, the reflector 108, and the light guide plate 110. The cover plate 102 may be affixed to the edge-lit lighting housing 102 via one or more screws 116. Alternatively, other fastening means may be used to attach the edge-lit housing 102 to the cover plate 102. Further, as shown in FIG. 1, the cover plate 102 includes one or more silicone injection ports 104. As shown in FIG. 3, the silicone injection ports 104 are used to deposit a silicone potting layer 300 on each of the LEDs. In particular, the light guide plate 110, the edge-lit lighting housing 100 and the cover plate 102 form an enclosed area (shown via biased lines in Fig. 3, and is essentially the same area as the silicone potting layer 300) to contain the silicone gel. The silicone injection ports 104 are configured in the cover plate 102 to convey the silicone potting layer 300 to the plurality of LEDs 200.

FIG. 2 illustrates a simplified cross-sectional view of an edge-lit lighting assembly 10. As shown in FIG. 2, the edge-lit lighting assembly 10 includes housing 100. Flexible tape 106 is affixed to the housing 100. A plurality of LEDs 200 are mounted to the flexible tape 106. When the LEDs 200 are powered by a driver assembly 112 (not pictured), the LEDs 200 generate light 202 directed towards the center of the edge-lit lighting assembly 10. The light 202 is distributed by light guide plate 110, and then reflected downward by reflector 108. Cover plate 102 is arranged on top of reflector 108 to, among other features, protect the components of the edge-lit lighting assembly 10 from environmental elements.

As shown in FIG. 2, a gap 120 exists between the LEDs 200 and the nearest edge of the light guide plate 110. In previous edge-lit systems, this gap 120 would be empty, filled with only ambient air. Thus, in these systems, light 202 emitted by one of the plurality of LEDs 200 must pass through this air gap between the LED 200 and the light guide plate 100. The LED, the air, and the light guide plate 110 each have a different refractive index. Air has a refractive index of 1. In one example, the light guide plate 110 may be a type of plastic, such as PMMA, and have a refractive index of 1.48. Alternatively, the light guide plate 110 may be PC, and have a refractive index of 1.52. The changes in refractive index from the LED 200 to the gap 120 to the light guide plate 110 introduce inefficiencies in terms of lighting output. In some cases, these inefficiencies result in an optical loss of up to 30 percent. Further, the gap 120 potentially exposes the LED 200 to water, dust, and other debris.

FIG. 2 further shows the gap filled with a silicone potting layer 300. The silicone potting layer 300 may comprise an insoluble, viscous optical silicone gel. The silicone gel may be engineered to have a refractive index close to or substantially equal to the refractive index of the light guide plate 110, thus significantly reducing the losses due to the transition of the light 202 from the gap 120 to the light guide plate 110. In this way, the silicone potting layer 300 optically couples the LED 200 directly to the light guide plate 110, increasing efficiency by reducing losses regarding physical distance, differences in refractive index, and light leaks. The silicone potting layer 300 also protects the LED 200 from water, dust, and other environmental elements.

FIG. 3 shows a more detailed cross-sectional view of an edge-lit lighting assembly 10 of FIG. 2. For example, FIG. 3 shows a silicone injection port 104 arranged within the cover plate 102. The silicone injection port 104 is further arranged above the LEDs 200, such that at least a portion of the silicone potting layer 300 may be deposited onto one or more LED 200 via the silicone injection port 104. In one example, the silicone potting layer 300 is deposited onto the plurality of LEDs 200 via low pressure injection molding.

FIG. 3 further shows a gasket 116 arranged between the edge-lit lighting housing 100 and a lower edge of the light guide plate 110. The gasket 116 provides a couple of different benefits to the edge-lit lighting assembly 10. First, the gasket 116 may be used to prevent water and/or other liquids from leaking into edge-lit lighting assembly 10 and damaging the LEDs 200 or other components. Second, the gasket 116 may also be used to prevent the viscous gel of the silicone potting layer 300 from leaking out of the edge-lit lighting assembly 10. Other benefits of the gasket 116 may be apparent to those of skill in the art.

FIG. 3 also illustrates a screw 116 mechanically coupling the cover plate 102 to the edge-lit lighting housing 100. Any practical number of screws 116 may be used. In other examples, other fastening mechanisms may be used to couple the cover plate 102 to the edge-lit lighting housing 100.

FIG. 4 is a cross-sectional view of a blue die LED 500 arranged on a substrate 800, such as a portion of a PCB, within an optic 700. The optic 700 of FIG. 4 is depicted as dome-shaped, but may be any other practical shape. The optic 700 is substantially transparent, allowing the light 502, 604 to pass through. The optic 700 forms a cavity 702 around the blue die LED 500. In the example of FIG. 4, the cavity 702 is empty except for ambient air.

Blue die LEDs 500 emit blue light 502, and are the most commonly available LEDs. White light 604 is then achieved by depositing a layer of phosphor 602 onto the blue die LED 500. In FIG. 4, particles of phosphor 602 in the deposited layer are illustratively represented by black circles; however, in real-world implementations, the layer of phosphor 602 may resemble a homogenous material coat over the outer surface of the blue die LED 500. The arrangement and properties of the phosphor 602 may dictate certain properties of the white light 604 emitted by the optic 700, such as color temperature. Thus different light source packages must be purchased for each combination of desired properties, limiting flexibility and customization during assembly. Further, as with the edge-lit example above, the differences in refractive index between the blue die LED 500, the air within the cavity 702, and the optic 700 result in light losses and decreased efficiency.

The light source 400 of FIG. 5 is designed to address the manufacturing and efficiency issues in the arrangement of FIG. 4. In FIG. 5, the optic 700 is filled with a silicone potting layer 300. As with the previous examples, the silicone potting layer 300 may be a viscous optical silicone gel. The silicone potting layer 300 is configured to have a refractive index close to or substantially equal to the refractive index of the optic 700, significantly reducing losses and inefficiencies. Further, and unlike the examples of FIGS. 2 and 3, the silicone potting layer 300 includes phosphors 602 to convert the blue light 502 emitted by the blue die LED 500 to white light 604. The recipe of the silicone potting layer 300 and the phosphor 602 may be optimized to generate white light 604 of the desired color temperature. Thus, the color temperature of the white light 604 may be customized on a case- by-case basis while still using the same blue die LEDs 500.

FIG. 6 illustrates an isometric view of the light source 400 of FIG. 5. While this light source 400 may be used in the edge-lit lighting assembly 10 described with reference to FIGS. 1-3, it may also be used in a wide array of configurations, such as a discrete light source, or arranged on various substrates 800, such as an MCPCB or a flexible tape 106.

FIG. 7 illustrates a variation of the edge-lit lighting assembly 10 of FIG. 2. In this example, a blue die LED 400 is mounted to the edge-lit lighting housing 100 via flexible tape 106. The blue die LED 400 emits blue light 502. As with the example corresponding to FIGS. 5 and 6, the silicone potting layer 300 comprises phosphors 602. The phosphors 602 convert the blue light 502 to white light 604. Further, the silicone potting layer 300 may have a refractive index substantially equal to the refractive index of the light guide plate 110. Thus, along with converting the blue light 502 to white light 604, the silicone potting layer 300 optically couples the blue die LED 400 directly to the light guide plate 110, increasing efficiency by reducing losses regarding physical distance, differences in refractive index, and light leaks.

All definitions, as defined and used herein, should be understood to control over dictionary definitions, definitions in documents incorporated by reference, and/or ordinary meanings of the defined terms.

The indefinite articles “a” and “an,” as used herein in the specification and in the claims, unless clearly indicated to the contrary, should be understood to mean “at least one.”

The phrase “and/or,” as used herein in the specification and in the claims, should be understood to mean “either or both” of the elements so conjoined, i.e., elements that are conjunctively present in some cases and disjunctively present in other cases. Multiple elements listed with “and/or” should be construed in the same fashion, i.e., “one or more” of the elements so conjoined. Other elements may optionally be present other than the elements specifically identified by the “and/or” clause, whether related or unrelated to those elements specifically identified.

As used herein in the specification and in the claims, “or” should be understood to have the same meaning as “and/or” as defined above. For example, when separating items in a list, “or” or “and/or” shall be interpreted as being inclusive, i.e., the inclusion of at least one, but also including more than one, of a number or list of elements, and, optionally, additional unlisted items. Only terms clearly indicated to the contrary, such as “only one of’ or “exactly one of,” or, when used in the claims, “consisting of,” will refer to the inclusion of exactly one element of a number or list of elements. In general, the term “or” as used herein shall only be interpreted as indicating exclusive alternatives (i.e. “one or the other but not both”) when preceded by terms of exclusivity, such as “either,” “one of,” “only one of,” or “exactly one of.”

As used herein in the specification and in the claims, the phrase “at least one,” in reference to a list of one or more elements, should be understood to mean at least one element selected from any one or more of the elements in the list of elements, but not necessarily including at least one of each and every element specifically listed within the list of elements and not excluding any combinations of elements in the list of elements. This definition also allows that elements may optionally be present other than the elements specifically identified within the list of elements to which the phrase “at least one” refers, whether related or unrelated to those elements specifically identified.

It should also be understood that, unless clearly indicated to the contrary, in any methods claimed herein that include more than one step or act, the order of the steps or acts of the method is not necessarily limited to the order in which the steps or acts of the method are recited.

In the claims, as well as in the specification above, all transitional phrases such as “comprising,” “including,” “carrying,” “having,” “containing,” “involving,” “holding,” “composed of,” and the like are to be understood to be open-ended, i.e., to mean including but not limited to. Only the transitional phrases “consisting of’ and “consisting essentially of’ shall be closed or semi-closed transitional phrases, respectively.

Other implementations are within the scope of the following claims and other claims to which the applicant may be entitled.

While various examples have been described and illustrated herein, those of ordinary skill in the art will readily envision a variety of other means and/or structures for performing the function and/or obtaining the results and/or one or more of the advantages described herein, and each of such variations and/or modifications is deemed to be within the scope of the examples described herein. More generally, those skilled in the art will readily appreciate that all parameters, dimensions, materials, and configurations described herein are meant to be exemplary and that the actual parameters, dimensions, materials, and/or configurations will depend upon the specific application or applications for which the teachings is/are used. Those skilled in the art will recognize, or be able to ascertain using no more than routine experimentation, many equivalents to the specific examples described herein. It is, therefore, to be understood that the foregoing examples are presented by way of example only and that, within the scope of the appended claims and equivalents thereto, examples may be practiced otherwise than as specifically described and claimed. Examples of the present disclosure are directed to each individual feature, system, article, material, kit, and/or method described herein. In addition, any combination of two or more such features, systems, articles, materials, kits, and/or methods, if such features, systems, articles, materials, kits, and/or methods are not mutually inconsistent, is included within the scope of the present disclosure.

Claims

CLAIMS:

1. An edge-lit lighting assembly (10), comprising: an edge-lit lighting housing (100); a plurality of light-emitting diodes (LEDs) (200) mounted to the edge-lit lighting housing (100); a light guide plate (110) arranged to distribute light (202) generated by the plurality of LEDs (200). a silicone potting layer (300) deposited on each of the plurality of LEDs (200) wherein the silicone potting layer (300) provides a coupling for light emitted from the plurality of LEDs into an edge of the light guide, and wherein the light guide plate (110), the edge-lit lighting housing (100) and a cover plate (102) forms an enclosed area to contain the silicone gel and at least one of the one or more silicone injection ports (104) configured to convey at least a portion of the silicone potting layer (300) to at least one of the plurality of LEDs (200).

2. The edge-lit lighting assembly (10) of claim 1, wherein the silicone potting layer (300) is configured to emit light (202) generated by the plurality of LEDs (200).

3. The edge-lit lighting assembly (10) of claim 1, wherein the silicone potting layer (300) is insoluble.

4. The edge-lit lighting assembly (10) of claim 1, wherein the one or more silicone injection ports (104) are arranged in a cover plate (102) positioned above at least one of the plurality of LEDs (200).

5. The edge-lit lighting assembly (10) of claim 1, wherein each of the LEDs (200) are vertically mounted.

6. The edge-lit lighting assembly (10) of claim 1, wherein each of the LEDs (200) are mounted to the edge-lit lighting housing (100) via a flexible tape (106).

7. The edge lit-lighting assembly (10) of claim 1, further comprising a reflector

(108) arranged to reflect light (202) generated by the plurality of LEDs (200).

8. The edge-lit lighting assembly (10) of claim 7, wherein the silicone potting layer (300) is adjacent to the light guide plate (110).

9. The edge-lit lighting assembly (10) of claim 1, wherein at least one of the LEDs (200) is a blue die LED (500) configured to emit blue light (502), and further wherein at least a portion of the silicone potting layer (300) comprises phosphors (602) configured to convert the blue light (502) to white light (604).

10. A light source (400), comprising: a blue die light-emitting diode (LED) (500) configured to emit blue light (502); and a silicone potting layer (300) deposited on the blue die LED (500), wherein the silicone potting layer (300) comprises phosphors (602) configured to convert the blue light (502) to white light (604).

11. The light source (400) of claim 10, further comprising an optic (700) forming a cavity (702) around the blue die LED (500).

12. The light source (400) of claim 11, wherein the silicone potting layer (300) substantially fills the cavity (702).

13. The light source (400) of claim 12, wherein the blue die LED (500) is mounted to an edge-lit lighting assembly (10).