TW201317516A - Lighting assembly - Google Patents

Abstract

A lighting assembly includes alight guide in which light propagates by total internal reflection between opposed major surfaces. The light guide is edge lit by a light source the inputs light of a first spectrum to the light guide. Light of a second spectrum is mixed with the light of the first spectrum so that light output by the lighting assembly has a spectrum that is a combination of the first spectrum and the second spectrum.

Description

Lighting assembly

The invention relates to a lighting assembly.

Energy efficiency has become an area of interest for energy consuming devices. A certain type of energy consuming device is a lighting device. Solid-state light sources such as light emitting diodes (LEDs) appear to be promising as an energy efficient source for lighting devices. Different LEDs have different efficiencies. However, higher efficiency LEDs may not output a color temperature suitable for the light to be applied.

Aspects of the invention are a light bulb comprising a light guide constructed to form a hollow body surrounding an interior volume, the light guide comprising an inner major surface, an outer major surface, a proximal end, a distal end, a proximal light input edge, a light extraction element of at least one major surface; a light source illuminating an edge of the light guide with white light of the first spectrum such that light of the first spectrum is transmitted to the light guide by total internal reflection, and at least a portion of the light of the first spectrum Extracting from the light guide by the light extraction element via the outer major surface; and a color adjuster disposed at least partially within the interior volume and configured to direct light narrower than the second spectrum of the first spectrum toward the inner major surface, and at least A portion of the second spectrum of light passes through the light guide and mixes the light of the first spectrum such that the spectrum of the output light output by the bulb is a combination of the first spectrum and the second spectrum.

Another aspect of the invention is a lighting assembly that includes a first light a source that emits white light of a first spectrum; a second source that emits light that is narrower than a second spectrum of the first spectrum; and a light guide that includes first and second opposing major surfaces, and the light is entirely internal The reflection is transmitted therebetween; a dispersed region at the edge of the light guide, including a dispersion feature, a first light input edge, and a second light input edge, wherein the light guide is illuminated at the first light input edge by the light from the first light source, the light guide is The second light input edge is illuminated by the light from the second light source, and wherein the dispersing feature is configured to disperse light of the second spectrum among the light of the first spectrum to produce mixed light having a spectrum of the first spectrum and a combination of the second spectrum; and a light extraction element that extracts the mixed light from the light guide via one or two major surfaces on one or both major surfaces of the light guide.

Another aspect of the present invention is a light bulb comprising the first lighting assembly of claim 33; the second lighting assembly of claim 33, wherein the light guides of the first and second lighting assemblies are both included a proximal end and a distal end; and a housing at a proximal end of the light guide that maintains the light guide of the illumination assembly and the first and second light sources; wherein the second light source of the first illumination assembly is disposed in the light guide of the first illumination assembly Between the individual side edges and the light guide of the second illumination assembly.

Another aspect of the invention is a lighting assembly including a first light guide including a first major surface, a second major surface, a proximal end, a distal end, a proximal light input edge, and at least one major surface a light extraction element; a first light source illuminating an edge of the first light guide with white light having a first spectrum such that white light is transmitted to the first light guide by total internal reflection, and at least a portion of the white light is passed through the light extraction element Extracting from the first light guide via the first major surface; a second light source providing a second spectrum having a narrower spectrum than the first spectrum And a second, elongated light guide comprising a light output surface, a proximal end, a distal end, a light input edge at the proximal end, a light extraction element, the light output surface area of the second light guide being smaller than the primary light guide a surface, and having a length corresponding to a length of the first light guide from a proximal end to a distal end, the second light guide being configured with a light output surface relative to a second major surface of the first light guide to direct auxiliary light extracted from the second light guide a second main surface of the first light guide via the light output surface, and at least part of the auxiliary light passes through the first light guide and is mixed with white light, such that the output light output by the illumination assembly has a spectrum of the first spectrum and the second spectrum The combination.

Another aspect of the invention is a light bulb comprising a light guide having a longitudinal axis, the light guide comprising opposing major surfaces, a proximal end, a distal end, a proximal light input edge, and a light extraction element on the at least one major surface a solid state illuminator adjacent to the light input edge to illuminate the edge of the light guide via the light input edge, the light being transmitted to the light guide by total internal reflection and extracted from the light guide by the light extraction element to provide a first spectrum And a heat sink coupled to the illuminator, the heat sink including a color adjustment surface adjacent to the light guide and radially outward from the light guide to adjust the color of the light output by the light bulb, the color adjustment surface being part of The light of the second spectrum is provided when a spectrum of light is incident thereon such that the color of the light output by the bulb is a combination of the first spectrum and the second spectrum.

Specific aspects will now be described with reference to the drawings, wherein the same reference numerals are used to refer to the same elements. The drawings are not necessarily drawn to scale. on Features described and/or exemplified in a particular aspect may be used in the same manner or in a similar manner to one or more other specific aspects and/or combinations in addition to or in place of other specific features.

Referring initially to Figures 1-3, an exemplary embodiment of the lighting assembly 10 is shown. This particular aspect of the lighting assembly 10 is constructed as a light bulb. The "light bulb" referred to in this disclosure is intended to cover a wide range of light-generating devices that incorporate and engage any of a variety of fasteners for mechanically installing and providing power to the light-generating device. Examples of such fasteners include, but are not limited to, a screw-in fastener for engaging an Edison bulb base, a cartridge-type fastener for engaging a cassette bulb substrate, and a foot for engaging a two-legged bulb substrate Fixings. Thus the term "bulb" does not in itself impose any restrictions on the shape of the light-generating device or the mechanism by which light is generated from electricity. However, in one specific aspect, the bulb conforms to the outer envelope of the A19 bulb. At the same time, the bulb does not need to have a closed envelope that forms a light producing environment. Although the bulb can conform to the American National Standards Institute (ANSI) or other standards, the bulb does not necessarily match this.

Illumination assembly 10 includes a non-planar, optically conductive light guide 12 that is open at opposite ends (referred to as proximal end 14 and distal end 16). In the illustrated example, the shape of the light guide 12 is cylindrical. Light input edge 18 is provided at the edge surface of proximal end 14, and light from source 20 is passed through this input light guide 12. In the illustrated example, light source 20 includes a solid state light emitter mounted on printed circuit board 22. Printed circuit board 22 is typically thermally conductive. An exemplary solid state illuminator constructed as a single illuminating device, such as a single LED dies, is shown using reference numeral 21. Reference numeral 21 can also be used to refer to the reference More than one solid state lighting device.

The light source 20 is arranged such that light from the source 20 enters the light input edge 18 at the proximal end 14 of the light guide 12 and is totally internally reflected by the major surface 24 within the light guide 12 and the major surface 26 outside the light guide 12. Walk through the light guide 12. In one embodiment, the solid state illuminators 21 that make up the light source 20 are arranged in a loop or another suitable pattern depending on the shape of the light input edge 18 of the light guide 12 that supplies the light.

The light guide 12 includes a light extraction element 28 of one or both of the major surfaces 24, 26 to extract light from the light guide 12 via at least the outer major surface 26. The extracted light is represented by the arrow indicated by reference numeral 30. Typically, additional light 31 is drawn through the inner major surface 24.

In order to reduce power consumption, the light source 20 is a relatively efficient light source. The more efficient source 20 has an efficiency greater than about 80 lumens per watt (lm/W). In one embodiment, the solid state illuminator 21 constituting the light source 20 is an LED. Other types of solid state illuminators 21 include organic LEDs (OLEDs).

A simplified example of a solid state illuminator 21 having an LED is illustrated in FIG. The solid state illuminator 21 includes an LED die 32 having a light emitting surface 34 that emits a substantial portion of the light. The LED die 32 is covered by a layer 36 comprising a wavelength shifting material, such as a phosphor material. The wavelength shifting material converts at least some of the light emitted by the LED die 32 into longer wavelength light. The light output by the wavelength shifting material and any unconverted light combine to form light of the first spectrum. Light of the first spectrum is transmitted through the light guide 12 by total internal reflection and is light 30, 31 that is extracted from the light guide 12 by the light extraction element 28 via the outer major surface 26 and the inner major surface 24, respectively. The light source 20 can be a top-emitting LED Or side-emitting LEDs. The solid state illuminator 21 is a wide spectrum LED that emits white light.

In an exemplary embodiment, the first spectrum of light emitted by solid state illuminator 21 is referred to in the art as "cool white" light (e.g., the color temperature of light produced by solid state illuminator 21 ranges from about 5,000 K). To about 7,000 K). Solid state illuminators that emit cool white light typically have efficiencies greater than about 120 lm/W. For many applications, however, it is preferred to have light that is warmer than cool white light. Cool white light is unacceptable for this application, although it has a relatively high light production efficiency. In contrast, warm white light has a color temperature range of from about 2,500 K to about 3,500 K, which is acceptable for specific lighting applications. However, since the LEDs that produce warm white light have substantially lower efficiency than the LEDs that produce cool white light, it is preferred to use LEDs that produce cool white light to reduce energy consumption.

In order to warm the light 30, 31 of the first spectrum generated by the LED producing the cool white light, the illumination assembly 10 includes a color adjuster 38 that is at least partially disposed within the interior volume 40 of the light guide 12. The color adjuster 38 is constructed to direct light (represented by arrow 42) that is different from the second spectrum of the first spectrum toward the inner major surface 24. The light 42 of the second spectrum is spectrally narrower than the light of the first spectrum. The light 42 of the second spectrum passes through the light guide 12 and is mixed with light 30 of the first spectrum such that the output light 44 output by the illumination assembly 10 has a spectrum that is a combination of the first spectrum and the second spectrum. The color adjuster 38 is also constructed to direct the light of the second spectrum (represented by arrow 43 but having a different angular distribution of light than the light 42) to mix the light 31 of the first spectrum, thus the output of the illumination assembly 10 The additional output light 45 has a spectrum that is a combination of the first spectrum and the second spectrum. Typically, light 45 is open through the light guide 12 End 16 output.

The spectral measurements of the output lights 44 and 45 place the illumination assembly 10 in an integrated sphere and measure the spectrum using a sensor positioned on the interior surface of the integrated sphere. As a practical example of the illumination assembly 10 described herein with reference to the drawings, since the light of the first spectrum and the light of the second spectrum have different source locations, and the light of the first spectrum and the light of the second spectrum may be different The directional nature, resulting in a small change in the spectrum of the output light 44 and 45 (depending on the position of the viewer relative to the illumination assembly 10).

In an exemplary aspect, the second spectral light 42, 43 is red light, or more broadly, narrow-band light having a wavelength peak ranging from about 550 nanometers (nm) to about 750 nm. The light in the first spectrum is cool white light and the light in the second spectrum is a specific aspect of red light, and the resulting mixed output light 44, 45 has a spectrum that is warmer than the first spectrum. At the same time, in a particular aspect, the intensity of the second spectral light 42, 43 is less than the intensity of the first spectral light 30, 31. The light intensity is measured in lumens, that is, the number of candles per square meter (cd/m ² ), or measured in another suitable unit of measurement. In one embodiment, the intensity ratio of the intensity of the second spectral light 42, 43 to the light 30, 31 of the first spectrum ranges from about one to two to about one to twenty. In a specific aspect, the ratio ranges from about one to six to about one to twelve.

The color adjuster 38 includes a light source 46 and a light director 48 that directs at least a portion of the light from the light source 46 toward the inner major surface 24. In one embodiment, light source 46 is comprised of one or more solid state illuminators (eg, LEDs). An exemplary solid state illuminator is shown at 47. Reference numeral 47 is also used to indicate solid state illuminators that together form a light source 46. Can be used as a light source 46 Other types of solid state light sources include laser diodes and organic LEDs (OLEDs). Typically, solid state illuminator 47 is a monochromatic LED. Such LEDs do not employ a phosphor and typically have an efficiency greater than that of a phosphor using a phosphor (e.g., greater than 150 lm/W).

In the particular aspect of Figures 1-3, light director 48 is a light guide 50 having a light input edge 52 (through which light from source 46 is received) and an output surface 54 (via which light 42 is extracted). Light is transmitted to light guide 50 by total internal reflection at output surface 54, and is extracted from light guide 50 by light extraction element 56 positioned at light output surface 54. In the particular aspect exemplified, the light guide 50 is a solid cylinder. In one embodiment, the light director 48 has a length corresponding to the length of the light guide 12 (e.g., ranging from about 80% to about 120% of the length of the light guide 12). Moreover, the area of the output surface 54 is smaller than either of the major surfaces 24, 26. In one embodiment, the area of the output surface 54 is substantially smaller (e.g., less than about 25% of the area of one of the major surfaces 24, 26).

Once output from the light output surface 54, light 42 travels through the interior volume 40 of the light guide 12 and is incident on the inner major surface 24. Light 42 enters light guide 12 via inner major surface 24 and exits light guide 12 via outer major surface 26.

In one embodiment, the solid state illuminator 47 that forms the light source 46 is mounted to a thermally conductive printed circuit board 58 that is separate from the printed circuit board 22 on which the solid state illuminator 21 that forms the light source 20 is mounted. In another embodiment, the light source 20 and the light source 46 are mounted to the same printed circuit board 22.

The lighting assembly 10 further includes a cover 60 at the proximal end 14 of the light guide 12. The cover 60 maintains the printed circuit board 22, the light source 20, the light guide 12, and the color adjuster 38. The cover 60 also includes a base 62 that is constructed to mechanically mount Lighting assembly 10 and receiving power.

With continued reference to Figures 1-3, the light guide 12 is a solid object, for example made of acrylic, polycarbonate, glass or another suitable material. Light guide 12 can also be a multilayer light guide having two or more layers.

The dimension of each major surface 24, 26 is much greater than (typically ten or more times greater than) the thickness of the light guide 12. The thickness is the dimension of the light guide 12 in a direction orthogonal to the major surfaces 24, 26. The thickness of the light guide 12 can be, for example, from about 0.1 millimeters (mm) to about 10 mm. Light guide 12 can be rigid or flexible.

As indicated, the light guide 12 includes light extraction elements 28 in, above or below at least one of the major surfaces 24, 26, and the light guide 50 includes light in, above or below the light output surface 54, Element 56 is extracted. Light extraction elements 28, 56 in, above or below the individual surfaces will be referred to as "on" the surface. The function of each of the light extraction elements 28, 56 is to destroy the total internal reflection of the transmitted light incident on the light extraction elements 28, 56. In one embodiment, the light extraction element 28 reflects light toward the opposite major surface such that light exits the light guide 12 via the opposing major surfaces. Alternatively, the light extraction elements 28, 56 transmit light via the light extraction elements and exit from the surfaces 24, 26, 54 having the light extraction elements 28, 56. In another embodiment, the two light extraction elements are present at the same time. In yet another embodiment, the light extraction elements 28, 56 reflect some of the light incident thereon and refract the remaining light. Thus, the light extraction element 28 of the light guide 12 is constructed to extract light from the light guide 12 via one or both of the major surfaces 24, 26, and the light extraction element 56 of the light guide 50 is constructed to pass from the light guide 50 via the light output surface 54. Extract light. The light extraction element 28 can be arranged to pass through a portion or the entirety of one or both of the major surfaces 24, 26. Light is extracted and the light extraction element 56 can be arranged to extract light via a portion or the entire light output surface 54.

A light guide having such a light extraction element is typically formed by, for example, stamping, molding, embossing, extrusion, laser etching, chemical etching, or another suitable process. The light extraction element can also be produced by depositing a curable material on the light guide and using heat, ultraviolet light or other radiation to mature the deposited material. The curable material can be deposited by, for example, printing, ink jet printing, screen printing, or another suitable process. Alternatively, the light extraction element can be in the light guide (for example, the light extraction element can be light redirecting particles and/or voids disposed in the light guide).

In one embodiment, the light extraction elements are constructed to extract light at a defined surface with a defined intensity profile (eg, a uniform intensity profile) and/or to extract light at a defined ray angular distribution. Variations in the light extraction element, the associated surface or portions thereof may have different intensity profiles and/or ray angle distributions. The intensity profile refers to the intensity that varies with position in the illumination area (e.g., the area of the main surface 24, 26 from which light is extracted). The ray angle distribution refers to the intensity that varies with the ray angle (typically a solid angle) of the light extracted through the illuminating surface (e.g., the area of the main surfaces 24, 26 from which the light is extracted).

Exemplary light extraction elements 28, 56 include light scattering elements, typically characterized by ambiguous shapes or surface textures, such as printed features, inkjet printing features, selective deposition features, chemical etching features, lasers Etching features...etc. Other exemplary light extraction elements 28, 56 include features that are well defined shapes, such as V-shaped grooves, lenticular grooves, and a well-defined shape that is small relative to the linear dimension of surfaces 24, 26, 54. (This is referred to herein as a micro-optical element). The smaller of the length and width of the micro-optical element is less than one-tenth of the larger of the length and width of the individual light guide, and the larger of the length and width of the micro-optic element is less than the length of the individual light guide and One-half of the smaller of the widths. The length and width of the micro-optical elements are measured parallel to the plane of the light guide surfaces 24, 26, 54 (in the case of a flat light guide) or along the surface profile (in the case of a non-flat light guide).

The micro-optical elements are shaped to form predictable reflected light or predictable refracted light. However, one or more surfaces of the micro-optical element may be modified, such as roughened, to produce a secondary effect on the light output. Exemplary micro-optical elements are described in U.S. Patent No. 6,752,505, the disclosure of which is hereby incorporated herein in The micro-optical elements can vary by one or more of size, shape, depth or height, density, orientation, tilt angle, or refractive index such that a desired light output from the light guide is achieved on the corresponding surface of the output light.

Other specific aspects of the illumination assembly 10 having the color adjuster 38 are also possible. Referring additionally to Figures 5 and 6, an exemplary such aspect is illustrated. In this particular aspect, the lighting assembly 10 includes a heat sink 64 that is disposed within the interior volume 40 of the light guide 12. The heat sink 64 includes a branch 66 that extends from the common node 68 toward the inner major surface 24 of the light guide 12. In this manner, the fins 64 have a branched cross-section, and each branch 66 extends outwardly from the common node 68, while the light guide 12 is divided into several regions 70 and the inner volume 40 is divided into individual regions 72.

The light director 48 in the exemplary aspect of the demonstration is a light guide 50, which is in each Each of the regions 72 has a segment 74 and is interposed between the branches 66 of the fins 64. Each segment 74 receives light from an individual solid state illuminator 47 that outputs a source 46 of second spectral light. Each section 74 of the light director 48 directs light of the second spectrum to pass through the individual regions 70 of the light guide 12 to mix light from the first spectrum of the source 20. In this particular aspect, each section 74 of the light director 48 is physically separate and independently supplied with light. In the particular aspect exemplified, each segment 74 is a solid cylinder having a light extraction element 56 (Fig. 2) on its surface to extract light from the second spectrum therefrom and direct at least a portion of the extracted light toward the interior of the light guide 12. Surface 24.

In one embodiment, the branches 66 of the fins 64 have spaced apart walls 76 that define an air flow channel 77 through which cooling air can flow. The air flow channels 77 of each branch 66 terminate in a through slit 78 between adjacent regions 70 of the light guide through which cooling air can pass between the air flow channel 77 and the environment surrounding the major surface 26 of the light guide 12 by. Additionally, vents 80 may be present in the casing 60 to allow for additional air flow.

Another specific aspect is shown in Figures 7 and 8. In this particular aspect, section 74 of light director 48 extends from portion 82 of the undivided section of light director 48. The portion 82 of the undivided section is not divided into sections by the heat sink 64. Portion 82 of the undivided section receives light from the second spectrum of light source 46, and light passes through portion 82 of the undivided section to each section 74. Each section 74 of the light director 48 directs light of the second spectrum to pass through the individual regions 70 of the light guide 12 to mix light from the first spectrum of the source 20. Light of the second spectrum may also be directed from the base 82 of the light director 48 toward the inner surface 24 of the light guide 12. In the specific aspect of the demonstration, each part of the undivided section 82 and section 74 are individual solid cylinders having a light extraction element 56 (Fig. 2) on their surface to extract light of the second spectrum therefrom and direct the extracted light toward the inner surface 24 of the light guide 12.

With additional reference to Figures 9 and 10, the segments 74 of the light director 48 are all solid, and the cross-sectional shape taken on a plane orthogonal to the longitudinal axis of each segment 74 is a circular block. Each section 74 has a flat surface 84 that conforms to the wall 76 of one of the fins 64 adjacent the adjacent branch 66. Each section 74 also includes a curved outwardly facing surface 86 having a light extraction element 56 (Fig. 2) to extract light of the second spectrum from section 74 and direct the extracted light toward individual sections 70 of the light guide 12. The segments 74 are located in individual regions 72 of the interior volume 40 and are interposed between the branches 66 of the fins 64. Each segment 74 receives light from an individual solid state illuminator 47 of a source 46 that outputs light of a second spectrum. Each section 74 of the light director 48 directs light of the second spectrum to pass through the individual regions 70 of the light guide 12 to mix light from the first spectrum of the source 20. In this particular aspect, each section 74 of the light director 48 is physically separate and independently supplied with light.

Another specific aspect is shown in Figures 11 and 12. In this particular aspect, section 74 of light director 48 extends from portion 82 of the undivided section of light director 48. The portion 82 of the undivided section is not divided into sections by the heat sink 64. Portion 82 of the undivided section receives light of the second spectrum from one or more solid state illuminators 47 of light source 46, and light passes through section 82 of the undivided section to each section 74. Each section 74 of the light director 48 directs light of the second spectrum to pass through the individual regions 70 of the light guide 12 to mix light from the first spectrum of the source 20. The surface of the portion 82 of the undivided section may also have a light pumping Element 56 (Fig. 2) extracts light of the second spectrum from portion 82 of the undivided section and directs the extracted light toward inner surface 24 of light guide 12.

In the particular aspect exemplified, the undivided sections 82 are solid cylinders, and the cross-sectional shape of each section 74 taken in a plane orthogonal to the longitudinal axis of section 74 is a circular block. Each section 74 has a flat surface 84 that conforms to the wall 76 of one of the fins 64 adjacent the adjacent branch 66. Each section 74 also includes a curved outwardly facing surface 86 having a light extraction element 56 (Fig. 2) to extract light of the second spectrum from section 74 and direct the extracted light toward individual sections 70 of the light guide 12. The segments 74 are located in individual regions 72 of the interior volume 40 and are interposed between the branches 66 of the fins 64. Each section 74 of the light director 48 directs light of the second spectrum to pass through the individual regions 70 of the light guide 12 to mix light from the first spectrum of the source 20.

Another specific aspect is shown in FIG. In this particular aspect, color adjuster 38 includes a light source 46 and a diverger 88 disposed between light source 46 and inner surface 24 of light guide 12. For example, the diffuser 88 is hollow and the light source 46 is located in the diffuser 88. Light source 46 emits light 42 of the second spectrum. This light 42 travels through a diffuser 88 which scatters at least a portion of the second spectral light (light 42) toward the inner major surface 24 of the light guide 12 and scatters at least a portion of the second spectral light (light 43) toward the light guide 12. Open the far end 16. The diverger 88 is shaped to illuminate the second spectrum of light at a ray angular distribution of light that approximates the first spectrum. In the illustrated example, the shape of the diffuser 88 is substantially hemispherical. Other shapes are also possible and can be used. The light 42 of the second spectrum passes through the light guide 12 and is mixed with the light 30 of the first spectrum, such that the output light 44 output by the illumination assembly 10 has a spectrum that is a set of the first spectrum and the second spectrum. Hehe. The light 43 is mixed with the light 31 of the first spectrum, such that the output light 45 output by the illumination assembly 10 has a spectrum that is a combination of the first spectrum and the second spectrum.

In another embodiment, the diffuser 88 has a color changing property to change the spectrum of light emitted by the source 46 to a second spectrum. The color change can be in the form of wavelength shift and/or selective color decay. The use of wavelength shifting herein refers to the process by which a material absorbs light at a particular wavelength and then emits light of one or more different wavelengths. The wavelength shift can be achieved using a phosphor material, a luminescent material, a luminescent nanomaterial (such as a quantum dot material), a conjugated polymer material, an organic fluorescent dye, an organic phosphorescent dye, a garnet doped with a lanthanide compound, or the like. . The wavelength shifting material is located within the interior volume 40 of the light guide 12. This reduces the visibility of the wavelength shifting material and provides a more attractive appearance of the bulb 10 when the bulb is not emitting light. Selective color decay can be achieved using a color filter material.

Another specific aspect is shown in FIG. In this particular aspect, color adjuster 38 does not include a light source that is separate from light source 20. The color adjuster 38 instead includes a reflector 90 (which is adjacent to the inner major surface 24 of the light guide 12) and a wavelength shifting element 92 (which is disposed between the reflector 90 and the inner major surface 24). Part of the light 30 of the first spectrum produced by source 20 is extracted from light guide 12 via inner major surface 24, and the spectrum is changed by wavelength shifting element 92 to produce light 42 of the second spectrum. The second spectral light 42 is reflected back by the reflector 90 toward the inner major surface 24 into the light guide 12 and exits the first spectrum of light 30 via the outer major surface 26, producing a mixed output light 44 output from the illumination assembly 10. . The output light 44 has a spectrum of the first spectrum and the second spectrum. combination.

In one embodiment, as explained above with respect to FIG. 4, light source 20 includes LED dies 32, each of dies 32 having a phosphor layer 36 that contributes to an individual spectral portion of light 30 of the first spectrum. Some of the light produced by each LED die 32 is not converted. This unconverted portion is converted by wavelength shifting element 92 (e.g., wavelength shifting element 92 converts at least a portion of the portion of the first spectrum of light contributed by LED die 32) to contribute an individual spectrum of light 42 of the second spectrum. section.

In one embodiment, the wavelength shifting element 92 is separated from the inner major surface 24 of the light guide 12 by an air gap. For example, wavelength shifting element 92 is coated on reflector 90. In one embodiment, the reflector 90 is provided by a reflective outer surface of the heat sink 64. In the particular aspect exemplified, the heat sink 64 has a reflective cylindrical outer surface that is concentric and coaxial with the light guide 12. The heat sink 64 may include other structural elements (not shown) to dissipate heat and direct the cooling airflow.

Turning now to Figures 15 and 16, an alternative lighting assembly 10 is illustrated. In this particular aspect, the light guide 12 is flat. However, the light guide 12 may also be non-flat (eg, curved about one or more axes), such as a partial cylinder. Illumination assembly 10 includes a light source 20 that emits light of a first spectrum and a light source 46 that emits light of a second spectrum that is different from the first spectrum as explained above.

The light guide 12 includes a light input edge 18 and first and second opposing major surfaces 94, 96 through which light is transferred between the two major surfaces. The light guide 12 further includes a discrete region 98 at the edge of the light guide. In Figures 15 and 16 In particular, the dispersed region 98 is adjacent to the light input edge 18, and light from the light source 20 illuminates the edge of the light guide 12 via the edge. The light guide 12 also includes one or more secondary light input edges 100 that are adjacent to the dispersion region 98, and light from the light source 46 illuminates the edges of the light guide 12 via the edges. In the particular aspect of Figures 15 and 16, the light input edge(s) 100 are non-parallel to the light input edge 18. In the particular aspect illustrated, the light input edge 18 is along a certain edge of the light guide 12 and the light input edge(s) 100 are pairs of individual opposite edges that are orthogonal to the light input edge 18 along the light guide 12. .

The dispersion region 98 includes a dispersion feature 102 that disperses light from the light source 46 among the light from the light source 20 to mix the light from the individual light sources 20 and 46 to produce mixed light that enters the light output region 104 of the light guide 12. The spectrum that the mixed light has is a combination of the first spectrum and the second spectrum. The light output region 104 includes light extraction elements 28 in one or both of the major surfaces 94, 96 of the light guide 12 to extract mixed light from the light guide 12 via one or both of the major surfaces 94, 96.

A particular feature of the discrete feature 102 includes a hole in the light guide 12 having a wall 106 that is nominally orthogonal to the major surfaces 94, 96 of the light guide 12. In the particular aspect of Figures 15 and 16, the discrete features 102 extend through the light guide 12 between the first major surface 94 and the second major surface 96, as shown in Figure 16. In a specific aspect, the decentralized feature 102 is open to the surrounding environment and is therefore filled with air. In other embodiments, the discrete features 102 are filled with a material having a refractive index different from that of the light guide 12. This material may be a gas or a liquid (in this case, the dispersion feature 102 is closed to the surrounding environment on the major surfaces 94 and 96), or may be a solid that is inserted into the light guide 12 or formed in the light guide 12 on the spot. material.

Referring additionally to Figures 17 and 18, variations of the lighting assembly 10 of Figures 15 and 16 are exemplified. In this variation, the discrete features 102 extend from at least one of the major surfaces 94, 96 through the light guide 12. In the particular aspect exemplified, certain discrete features 102 extend halfway from the first major surface 94 through the light guide 12, and certain discrete features 102 extend halfway from the second major surface 96 through the light guide 12. In other embodiments, the discrete features 102 extend only halfway through one of the major surfaces 94, 96 through the light guide 12.

In the particular aspect of Figures 15-18, the light input edge 100 illuminated by the light source 46 includes portions 108-1 and 108-2 that are separated from each other by the light input edge 18 illuminated by the light source 20.

The illumination assembly 10 of the particular aspect of Figures 15-18 can have utility as a display backlight. The lighting assembly 10 of the particular aspect of Figures 15-18 can also have the use of a lighting fixture to supply light in a variety of general lighting scenarios.

Referring additionally to Figures 19 and 20, another illumination assembly 110 in the form of a light bulb is shown. In this particular aspect, lighting assembly 110 includes one or more of lighting assemblies 10 as described with respect to Figures 15-18. In this particular aspect, each light guide 12 forms a curved region 70 of the light output region 104 of the illumination assembly 110. In the particular aspect exemplified, the light guides 12 are brought together to approximate a hollow cylinder that is open at both the proximal and distal ends 14, 16. Other geometrical forms are also possible, such as a cross section of the light output region 104 in a plane orthogonal to the longitudinal axis of the light emitting portion 112 is a polygon. Although not fully illustrated, the lighting assembly 110 can include a cover 60 and a base 62 (see Figure 1) and/or heat dissipation Sheet 64 (such as heat sink 64 of Figures 5 and 6, wherein branch 66 is aligned with a gap between light guides 12 that form slits 79 in light output region 104 of illumination assembly 110).

In one embodiment, the light source 46 for a certain light guide 12 is disposed between the individual side edges 114, 116 of the light guide 12 and the adjacent light guide 12. In the particular aspect exemplified, the light sources 46 for adjacent light guides 12 are located in the same slit 79 and face the individual light input edges 100 of the light guide 12.

To demonstrate in Figures 15, 17, 20, a line is shown to represent the boundary between the dispersed region 98 and the light output region 104. In one embodiment, the dispersed region 98 and the light output region 104 are integrally formed. Thus, the exemplary lines represent only boundaries, and the divisions that are visible or affecting light between regions 98 and 104 may not exist.

Referring additionally to Figure 21, a portion of the illumination assembly 10 in the form of a light bulb is shown in cross section. In this particular aspect, color adjuster 38 includes an organic light emitting diode (OLED) 118 that is adjacent to inner major surface 24 of light guide 12. The OLED 118 is constructed to produce light of a second spectrum (such as arrow 42) and directs light of the second spectrum toward the inner surface 24 of the light guide 12. The OLED 118 is spaced from the inner major surface 24 of the light guide 12.

In the particular aspect exemplified, the OLED 118 is mounted or formed on the flange substrate 120. OLEDs are susceptible to environmental conditions such as humidity. To counteract the effects of environmental conditions, the flange substrate 120 defines a pocket for the OLED 118 and the light guide 12 covers the pocket. In one embodiment, the seal between the light guide 12 and the flange of the substrate 120 encloses the OLED 118. In one embodiment, the flange substrate 120 is also provided with a sealed adhesive. The agent is fixed to the light guide 12. In one embodiment, the flange substrate 120 physically supports the light guide 12 and/or the OLED 118. At the same time, the surface of the substrate 120 facing the light guide 12 can be reflective. In some embodiments, substrate 120 is a partial heat sink, such as a cylindrical outer surface of a heat sink.

Referring additionally to Figure 22, another exemplary embodiment of the light bulb 200 is shown. Although the bulb 200 of FIG. 22 has features similar to those of the lighting assembly 10 described above, it will be described using a series of new reference numerals. Features described and/or exemplified with respect to lighting assembly 10 may be used in the same manner or in a similar manner for bulb 200 and/or in combination with or in lieu of the features of bulb 200, or vice versa.

The bulb 200 includes a non-planar optically conductive light guide 202 that is open at opposite ends (referred to as the proximal end 204 and the distal end 206). In the illustrated example, light guide 202 is a hollow body. In each particular example, an exemplary light guide 202 is an open ended hollow body that is cylindrical in shape. Other shapes are also possible, such as a frustoconical light guide or a flat light guide. A slit 208 is present in the light guide 202 to allow air to flow in fluid communication with the internal heat sink 210, which is located within the interior volume 212 defined by the light guide 202.

A light input edge 214 is provided at the edge surface of the proximal end 204 via which light from the light source 216 is input. In the illustrated example, light source 216 includes a solid state illuminator mounted on a printed circuit board (PCB) 218. Printed circuit board 218 is typically thermally conductive. An exemplary solid state illuminator that forms a single illuminating device, such as a single LED dies, is shown using reference numeral 220. Reference numeral 220 can also be used to collectively refer to more than one solid state lighting device. The internal heat sink 210 is thermally coupled to the solid state illuminator by the PCB 218 220 to dissipate the heat generated by the solid state illuminator 220. Solid state illuminator 220 is also thermally coupled to external heat sink 222 to dissipate heat generated by solid state illuminator 220.

The light source 216 is arranged such that light from the source 216 enters the light input edge 214 at the proximal end 204 of the light guide 202 and is totally internalized by the major surface 224 within the light guide 202 and the major surface 226 outside the light guide 202. Passing through the light guide 202. In one embodiment, the solid state illuminator 220 of the light source 216 is arranged in a loop or another suitable pattern depending on the shape of the light input edge 214 of the light guide 202 that supplies the light.

Light guide 202 includes a light extraction element 228 (shown in enlarged illustration of FIG. 22) of one or both of major surfaces 224, 226 to extract light from light guide 202 via at least outer major surface 226. In some embodiments, light is also extracted via the inner major surface 224.

In the exemplary embodiment of FIG. 22, the outer heat sink 222 also functions as a cover to maintain the light guide 202, the inner heat sink 210, the light source 216, the PCB 218, the drive electronics (not shown) of the light source 216, and the substrate. 230. The substrate 230 is constructed to mechanically mount the bulb 200 and receive power. In another embodiment, the outer heat sink 222 is coupled to the outer heat sink 222, the light guide 202, the inner heat sink 210, the light source 216, the PCB 218, the drive electronic component of the light source 216 (not shown), and the cover of the substrate 230. (not shown) separate. In the exemplary embodiment of FIG. 22, substrate 230 is an Edison spiral substrate and bulb 200 conforms to the outer envelope of the A19 bulb. In other specific aspects, the bulb 200 can have a different type of substrate (such as a two-legged substrate) or can conform to different shapes.

The outer fins 222 include fins 232 that are located at various locations on the circumference of the light guide 202 and that extend from the proximal end 204 parallel to the light guide 202 toward the distal end 206. The fins 232 are separated from the light guide 202 by an air gap that allows cooling air to flow between the fins 232 and the light guide 202. Each fin 232 includes a side surface 234 having a radial component relative to a longitudinal axis 235 of the bulb 200. The side surface 234 of this particular aspect is used as the color adjustment surface 236 of the color adjuster 238, the purpose of which will be described below. In one embodiment, the portion 240 of the outer fin 222 that joins the side surface 234 of the adjacent fin 232 also serves as the color adjustment surface 236. In other specific aspects, additional or different portions of the outer fin 222 radially outward from the light guide 202 serve as color adjusters 238. In still other specific aspects, the color adjuster 238 is positioned on one or more structures of the outer fins 222 that are not radially outward from the light guide 202. For example, such a structure may be supported by internal fins 210 that are radially outward from light guide 202, or may be supported by fins 232 that are radially outward from light guide 202.

In order to reduce power consumption, the light source 216 is a relatively efficient light source. The more efficient light source 216 has an efficiency greater than about 80 lumens per watt (lm/W). In one embodiment, the solid state illuminator 220 that forms the light source 216 is an LED. Other types of solid state illuminators 220 include organic LEDs (OLEDs).

Since solid state illuminator 220 is typically imaged as an LED, solid state illuminator 220 includes an LED die having a luminescent surface that emits a substantial portion of the light. The LED die is covered by a layer comprising a wavelength shifting material, such as a phosphor material. The wavelength shifting material converts at least some of the light emitted by the LED dies into longer wavelength light. Light from solid state illuminators is transmitted by total internal reflection The light guide 202 is passed through and is extracted from the light guide 202 by the light extraction element 228 via the outer major surface 226. Light 242 drawn from light guide 202 via outer major surface 226 will be referred to as light of the first spectrum. Each solid state illuminator 220 can be a top-emitting LED or a side-emitting LED. Typically, solid state illuminator 220 is a wide spectrum LED that emits white light.

In an exemplary aspect, the light emitted by solid state illuminator 220 is referred to herein as "cold white" light (e.g., the color temperature of light produced by solid state illuminator 220 ranges from about 5,000 K to about 7,000 K). Solid state illuminators that emit cool white light typically have efficiencies greater than about 120 lm/W. However, for many uses, the light emitted by the preferred bulb 200 is warmer than cool white light. Cold white light is unacceptable for this use, although it has a relatively high light production efficiency. In contrast, "warm white" light has a color temperature range of about 2,500 K to about 3,500 K, which is acceptable for specific lighting applications. However, LEDs that produce warm white light have substantially lower efficiency than LEDs that produce cool white light, so it is preferable to use LEDs that produce cool white light to reduce energy consumption.

Color adjuster 238 warms the light output by bulb 200. Light portion 244 drawn from the first spectrum of light guide 202 is incident on color adjuster 238. The color adjuster 238 has a color adjustment surface 236 that is adjacent to the outer major surface 226 of the light guide 202 and that is radially outward from the outer major surface 226 of the light guide 202. The portion of light 244 is transmitted from light guide 202 in a direction having a radially outward component such as to be incident on color adjustment surface 236 of color adjuster 238. This portion of light 244 is less than half of the first spectral light 242 drawn from the light guide 202 and is typically less than 30% of the light 242 of the first spectrum.

Color adjuster 238 changes the spectrum of the portion of light 244 incident on color changing surface 236 from a first spectrum to light 246 having a second spectrum. The light 246 of the second spectrum is different (e.g., warmer) than the light 242, 244 of the first spectrum. The altered light 246 (light of the second spectrum) and the unaltered light 242 (light of the first spectrum) are mixed outside of the light guide 202 such that the overall light output by the bulb 200 is a combination of the first spectrum and the second spectrum.

For a bulb design with fins that are radially outward from the light guide, the light from the light guide is intended to interact with the surface of the fin, and this will change the light by placing the color changing surface on the fin. s color. The desired light color change can be achieved without additional interaction between the light and the fin. The interaction between light and fins can be used to achieve a desired color change in light. Light from the light guide 202 is incident on the fins 232 and interacts with the fins 232, which are radially outward from the light guide 202, regardless of the color changing properties of its surface.

In one embodiment, color adjustment surface 236 includes a color attenuating material. Exemplary color-attenuating materials include, but are not limited to, lacquers, coatings (such as powder coatings), one or more narrow-band absorbers (eg, absorbers absorb a narrow range of visible spectrum, eg, the range has a full width at half maximum of less than 100 nm) ). A color attenuating material can be applied to the tape to apply to the fins 232.

In another embodiment, color adjustment surface 236 includes a wavelength shifting material. Exemplary wavelength shifting materials include, but are not limited to, phosphor materials, luminescent materials, luminescent nanomaterials, quantum dot materials, conjugated polymeric materials, organic fluorescent dyes, organic phosphorescent dyes, garnets doped with lanthanide compounds. In some cases, color adjustment surface 236 includes more than one wavelength shift material.

As indicated, the light 246 of the second spectrum changes the color of the light output by the bulb 200. In one embodiment, the output light from bulb 200 has a spectral color temperature that is more than 100 K lower than the first spectrum. In another embodiment, the output light from bulb 200 has a spectral color temperature that is less than 1,000 K below the first spectrum. The color change of the light output by the bulb 200 can be characterized in a manner other than color temperature: such a color rendering index, chromaticity, correlated color temperature, spectral power distribution, spectral balance.

The spectrum of light output by the bulb 200 is a mixture of light 242 and light 246 measured by placing the bulb 200 in an integrating sphere and measuring the spectrum using a sensor positioned on the interior surface of the integrating sphere. In the practical example of the light bulb described herein, since the light of the first spectrum and the light of the second spectrum have different source positions, and the light of the first spectrum and the light of the second spectrum may have different directional properties, the output is caused. The spectrum of light (depending on the position of the viewer relative to the bulb) can vary slightly.

Light guide 202 is a solid object, for example made of acryl, polycarbonate, glass or another suitable material. Light guide 202 can also be a multilayer light guide having two or more layers.

The dimension of each major surface 224, 226 is much greater than (typically ten or more times greater than) the thickness of the light guide 202. The thickness is the dimension of the light guide 202 in a direction orthogonal to the major surfaces 224,226. The thickness of the light guide 202 can be, for example, from about 0.1 millimeters (mm) to about 10 mm. Light guide 202 can be rigid or flexible.

As indicated, the light guide 202 includes at least one of the major surfaces 224, 226 Light extraction element 228 in one of, above or below one. Light extraction elements 228 in, above or below the individual surfaces will be referred to as "on" the surface. The function of each light extraction element 228 is to destroy the total internal reflection of the transmitted light incident on the light extraction element 228. In one embodiment, light extraction element 228 reflects light toward the opposite major surface such that light exits light guide 202 via the opposing major surface. Alternatively, the light extraction element 228 transmits light through the light extraction element and exits from the surface 224, 226 having the light extraction element 228. In another embodiment, the two light extraction elements are present at the same time. In yet another embodiment, the light extraction element 228 reflects some of the light incident thereon and refracts the remaining light. Thus, light extraction element 228 of light guide 202 is constructed to extract light from light guide 202 via one or both of major surfaces 224,226. Light extraction element 228 can be arranged to extract light via a portion or the entirety of one or both of major surfaces 224, 226.

A light guide having a light extraction element is typically formed by a process such as molding. The light extraction element is typically defined as a shim or insert for molding a light guide, such as diamond turning, laser etching, laser micro turning, chemical etching, or photolithography. Alternatively, any of the above processes can be used to define the light extraction elements in the master mold used to make the shim or insert. The light guide may also be replaced by a light extraction element initially formed, for example, by a molding process, and the light extraction element may be subsequently formed on one or two major surfaces by, for example, embossing, embossing, laser etching or another suitable process. on. The light extraction element can also be produced by depositing an element made of a curable material on one or both major surfaces of the light guide and using heat, ultraviolet light or other radiation to cure the deposited material. The curable material can be printed, sprayed, for example Ink printing, screen printing or another suitable process is deposited. Alternatively, the light extraction element is in the light guide and between the major surfaces (for example, the light extraction element can be light redirecting particles and/or voids disposed in the light guide).

In one embodiment, the light extraction elements are constructed to extract light at a defined surface with a defined intensity profile (eg, a uniform intensity profile) and/or to extract light at a defined ray angular distribution. Variations in the light extraction elements, associated surfaces, or portions thereof may have different intensity profiles and/or ray angle distributions. The intensity profile refers to the intensity that varies with the location in the illumination region (e.g., the area of the main surface 224, 226 from which light is extracted). The ray angular distribution refers to the intensity that varies with the angle of light (typically a solid angle) drawn through the illuminating surface (e.g., the area of the main surfaces 224, 226 from which light is extracted).

Exemplary light extraction elements 228 include light scattering elements, typically characterized by ambiguous shapes or surface textures, such as printed features, inkjet printing features, selective deposition features, chemical etching features, laser etched features. Features...etc. Other exemplary light extraction elements 228 include features that are well defined shapes, such as V-shaped grooves, lenticular grooves, features of a well-defined shape that are small relative to the linear dimension of surfaces 224, 226 (which is referred to herein as micro Optical element). The smaller of the length and width of the micro-optical element is less than one-tenth of the larger of the length and width of the individual light guide, and the larger of the length and width of the micro-optic element is less than the length of the individual light guide and One-half of the smaller of the widths. The length and width of the micro-optical elements are measured parallel to the plane of the light guide surfaces 224, 226 (in the case of a flat light guide) or along the surface profile (in the case of a non-flat light guide).

The micro-optical elements are shaped to form predictable reflected light or predictable refracted light. However, one or more surfaces of the micro-optical element may be modified, such as roughened, to produce a secondary effect on the light output. Exemplary micro-optical elements are described in U.S. Patent No. 6,752,505, the disclosure of which is incorporated herein in The micro-optical elements can vary by one or more of size, shape, depth or height, density, orientation, tilt angle, or refractive index such that a desired light output from the light guide is achieved on the corresponding surface of the output light.

The "light bulb" referred to in this disclosure is intended to broadly encompass a light-generating device that incorporates and engages any of a variety of fasteners for mechanically mounting the light-generating device and providing power thereto. Examples of such fasteners include, but are not limited to, a screw-in fastener for engaging an Edison bulb base, a cartridge-type fastener for engaging a cassette bulb substrate, and a foot for engaging a two-legged bulb substrate Fixings. Therefore, the term "light bulb" itself does not impose any restrictions on the shape of the light-generating device or the mechanism for producing light from electricity. However, in one specific aspect, the bulb conforms to the outer envelope of the A19 bulb. In another embodiment, the bulb conforms to the outer envelope of the PAR bulb. At the same time, the bulb does not need to have a closed envelope that forms a light producing environment. Even though the lamp may conform to one or more of the American National Standards Institute (ANSI) standards for lamps, one or more of the ENERGY STAR ^® standards or one or more of the other criteria, but not necessarily so in line with the bulb.

In the present disclosure, a list of options followed by the phrase "one of" is intended to mean that the column option is selected for replacement. For example, "one of A, B, and C" means A or B or C. A list of options followed by the phrase "at least one of..." is intended to mean one or more of the list of options. For example, "A, "At least one of B and C" means A or B or C or (A and B) or (A and C) or (B and C) or (A and B and C).

10‧‧‧Lighting components

12‧‧‧Light Guide

14‧‧‧ Near end

16‧‧‧ distal

18‧‧‧Light input edge

20‧‧‧Light source

21‧‧‧Solid illuminators

22‧‧‧Printed circuit board

24‧‧‧Main surface

26‧‧‧External main surface

28‧‧‧Light extraction components

30‧‧‧ extracted light (light of the first spectrum)

31‧‧‧Extra light (light of the first spectrum)

32‧‧‧LED dies

34‧‧‧Lighting surface

36‧‧‧A layer containing wavelength-shifting material

38‧‧‧Color adjuster

40‧‧‧ internal volume

42, 43‧‧‧second spectrum of light

44‧‧‧ Output light

45‧‧‧Extra output light

46‧‧‧Light source

47‧‧‧Solid illuminators

48‧‧‧Light director

50‧‧‧Light Guide

52‧‧‧Light input edge

54‧‧‧Light output surface

56‧‧‧Light extraction components

58‧‧‧Printed circuit board

60‧‧‧ shell cover

62‧‧‧Base

64‧‧‧ Heat sink

Branch of 66‧‧‧

68‧‧‧Common node

70, 72‧‧‧ areas

74‧‧‧ Section

76‧‧‧ separated walls

77‧‧‧Air flow channel

78‧‧‧through slit

79‧‧‧slit

80‧‧‧ vents

82‧‧‧Undivided sections

84‧‧‧flat surface

86‧‧‧Bending outward facing surface

88‧‧‧Diffuser

90‧‧‧ reflector

92‧‧‧ Wavelength shifting components

94‧‧‧ first major surface

96‧‧‧Second major surface

98‧‧‧Distributed area

100‧‧‧Secondary light input edge

102‧‧‧Distributed features

104‧‧‧Light output area

106‧‧‧ wall

Section 108-1, 108-2‧‧‧

110‧‧‧Lighting components

112‧‧‧Lighting section

114, 116‧‧‧ side edge

118‧‧‧Organic Luminescent Diodes

120‧‧‧Flange substrate

200‧‧‧ bulb

202‧‧‧Light Guide

204‧‧‧ Near end

206‧‧‧ distal

208‧‧‧slit

210‧‧‧Internal heat sink

212‧‧‧ internal volume

214‧‧‧Light input edge

216‧‧‧Light source

218‧‧‧Printed circuit board

220‧‧‧Solid illuminator

222‧‧‧External heat sink

224‧‧ inside main surface

226‧‧‧External main surface

228‧‧‧Light extraction components

230‧‧‧Base

232‧‧‧Fin

234‧‧‧ side surface

235‧‧‧ vertical axis

236‧‧‧Color adjustment surface

238‧‧‧Color adjuster

240‧‧‧ Section

242‧‧‧Light of the first spectrum

244‧‧‧ Part of the first spectrum of light

246‧‧‧second spectrum of light

Figure 1 is a schematic side view of an exemplary lighting assembly in the form of a light bulb; Figure 2 is a perspective view of the lighting assembly of Figure 1; Figure 3 is a cross-sectional view taken along line 3-3 of Figure 1; Figure 4 is for a lighting assembly Figure 5 is a perspective view of another exemplary lighting assembly; Figure 6 is a plan view of the lighting assembly of Figure 5; Figure 7 is a perspective view of another exemplary lighting assembly; Figure 8 is a top view of the lighting assembly of Figure 7 Figure 9 is a perspective view of another exemplary lighting assembly; Figure 10 is a top plan view of the lighting assembly of Figure 9; Figure 11 is a perspective view of another exemplary lighting assembly; Figure 12 is a top plan view of the lighting assembly of Figure 11; A partial cross-sectional view of an exemplary illumination assembly; Figure 14 is a partial cross-sectional view of an exemplary illumination assembly; Figure 15 is a schematic illustration of an exemplary illumination assembly; Figure 16 is an end of the illumination assembly of Figure 15 taken along line 16-16 of Figure 15. Figure 17 is a schematic view of an exemplary lighting assembly; Figure 18 is an enlarged view of the end of the lighting assembly of Figure 17 taken along line 18-18 of Figure 17; 19 is a top plan view of another exemplary lighting assembly; FIG. 20 is a cross-sectional view taken along line 20-20 of FIG. 19; FIG. 21 is a partial cross-sectional view of another exemplary lighting assembly; and FIG. A perspective view of a light bulb in which a portion of the light bulb is broken to reveal internal components.

10‧‧‧Lighting components

12‧‧‧Light Guide

14‧‧‧ Near end

16‧‧‧ distal

20‧‧‧Light source

21‧‧‧Solid illuminators

24‧‧‧Main surface

26‧‧‧External main surface

38‧‧‧Color adjuster

40‧‧‧ internal volume

46‧‧‧Light source

47‧‧‧Solid illuminators

48‧‧‧Light director

50‧‧‧Light Guide

54‧‧‧Light output surface

56‧‧‧Light extraction components

60‧‧‧ shell cover

62‧‧‧Base

Claims (72)

A light bulb comprising: a light guide constructed to form a hollow body surrounding an inner volume, the light guide comprising an inner major surface, an outer major surface, a proximal end, a distal end, a proximal light input edge, and at least one major surface a light extraction element; a light source that illuminates an edge of the light guide with white light of the first spectrum such that light of the first spectrum is transmitted to the light guide by total internal reflection, and at least a portion of the light of the first spectrum is extracted by light The element is extracted from the light guide via the outer major surface; and a color adjuster disposed at least partially within the interior volume and configured to direct light that is narrower than the second spectrum of the first spectrum toward the inner major surface, and at least a portion of the second spectrum The light passes through the light guide and mixes with the light of the first spectrum, such that the spectrum of the output light output by the bulb is a combination of the first spectrum and the second spectrum. A light bulb as claimed in claim 1, wherein the light guide is cylindrical. A light bulb as claimed in claim 1, wherein the light guide is a hollow body having an open end. A light bulb according to claim 1, wherein the light of the first spectrum has a cool white spectrum, and the output light has a spectrum warmer than the first spectrum. A light bulb of claim 4, wherein the light of the second spectrum is red light. A light bulb according to claim 4, wherein the light of the second spectrum is narrow-band light having a peak wavelength ranging from 550 nm to 750 nm. For example, the light bulb of claim 1 of the patent scope, wherein the light source includes two light sources Polar body. A light bulb according to claim 1, wherein: the light source is the primary light source; and the color adjuster comprises: a secondary light source; and a light director that directs a portion of the light from the secondary light source toward the inner surface. A light bulb as claimed in claim 8 wherein the light director comprises a diffuser. A light bulb according to claim 8 wherein: the light guide is a primary light guide; and the light director comprises an elongated secondary light guide and the secondary light source illuminates the end, the length of the secondary light guide being equivalent to the main light guide in the light transmission direction The upper length, and includes a light output surface having an area smaller than the major surface of the primary light guide, and an optical element to extract light from the secondary light source. A light bulb according to claim 10, wherein the primary light source and the secondary light source are adjacent to each other. For example, the bulb of claim 10 additionally includes a printed circuit board, and the primary and secondary sources are mounted thereto. A light bulb according to claim 8 wherein: the light guide is a primary light guide and the light extraction element is a primary light extraction element; the light director comprises a secondary light guide comprising a light output surface and a secondary light extraction at the light output surface The component; and the illumination from the second spectrum of the secondary source illuminates the edge of the secondary light guide, And the inner major surface toward the primary light guide is extracted by the secondary light extraction element via the light output surface of the secondary light guide. A light bulb according to claim 13 which additionally includes a heat sink having a branched cross section, and each branch extends outward from the common node and segments the main light guide into regions, and wherein the light director is segmented, The segments intervene in the branches of the heat sink, and each segment of the light director directs light through an individual region of the primary light guide. A light bulb as claimed in claim 14 additionally includes an individual secondary light source to illuminate each section of the light director. A light bulb as claimed in claim 14, wherein the section of the light director is cylindrical. A light bulb according to claim 16 wherein the section of the light director extends from a portion of the undivided section of the light director and the light passes from the secondary source to the section of the light director. The light bulb of claim 14, wherein the sections of the light director comprise surfaces conforming to adjacent branch surfaces of the heat sink, and each includes an outwardly facing surface that outputs light of the second spectrum. A light bulb as claimed in claim 18, wherein the outwardly facing surface is curved. A light bulb according to claim 18, wherein the section of the light director extends from a portion of the undivided section of the light director, and the light passes therethrough from the secondary source to the section of the light director. For example, the light bulb of claim 1 of the patent scope, wherein the color adjuster comprises: a reflector adjacent to the inner major surface; and a wavelength shifting element disposed between the reflector and the inner major surface; wherein the light extracting element is additionally constructed to form a first spectrum of the portion extracted from the light guide via the inner major surface Light, and the wavelength shifting element changes the spectral composition of the light of the first spectrum extracted through the inner major surface to produce light of the second spectrum, and the light of the second spectrum is reflected back by the reflector toward the inner major surface. A light bulb according to claim 21, wherein the wavelength shifting element is separated from the inner major surface by an air gap. A light bulb of claim 21, additionally comprising a heat sink in the interior volume, the heat sink comprising a reflective outer surface, and wherein the reflector is a reflective outer surface of the heat sink. The light bulb of claim 21, wherein: the light source comprises a light emitting diode and a phosphor to contribute an individual spectral portion of the light of the first spectrum; and the wavelength shifting element converts a portion of the spectrum of the portion contributed by the light emitting diode . The light bulb of claim 1, wherein the color adjuster comprises an organic light emitting diode (OLED) adjacent to the inner major surface, the OLED being configured to direct light of the second spectrum toward the inner surface of the light guide. A light bulb according to claim 25, wherein the bulb further comprises a flange substrate adjacent to the OLED and constructed to protect the OLED from environmental conditions, and the OLED is between the substrate and the light guide. A light bulb as claimed in claim 26, wherein the OLED is sealed by the substrate and the light guide. The light bulb of claim 1, further comprising a cover at a proximal end of the light guide, the cover maintaining a light source, a light guide, and a color adjuster. A light bulb of claim 28, wherein the cover comprises a base constructed to mechanically mount the light bulb and receive power. A light bulb according to claim 29, wherein the substrate comprises an Edison spiral substrate. For example, the bulb of claim 1 of the patent scope, wherein the bulb conforms to the outer envelope of the A19 bulb. The light bulb of claim 1, wherein the light extraction element is configured to extract light of the first spectrum of the other portion via the inner main surface; and the color adjuster is additionally constructed to direct light mixing of the second spectrum to be The light of the first spectrum extracted by the inner main surface. An illumination assembly comprising: a first light source that emits white light of a first spectrum; a second light source that emits light that is narrower than a second spectrum of the first spectrum; and a light guide that includes: first and second opposing a major surface, and light is transmitted therebetween by total internal reflection; a dispersed region at the edge of the light guide comprising a discrete feature, a first light input edge, a second light input edge, wherein the light guide is from the first light input edge The light of the light source illuminates the edge, the light guide is illuminated by the light from the second light source at the edge of the second light input, and the dispersed features are constructed Dispersing light of the second spectrum among the light of the first spectrum to produce mixed light having a spectrum of a combination of the first spectrum and the second spectrum; and a light extraction element that passes through one or two major surfaces of the light guide One or two major surfaces extract mixed light from the light guide. The illumination assembly of claim 33, wherein the first light input edge is non-parallel to the second light input edge. The illumination assembly of claim 33, wherein the first light input edge is along a certain edge of the light guide and the second light input edge is along a portion of the orthogonal edge of the light guide. The illumination assembly of claim 33, wherein the second light input edge comprises a portion that is separated from each other by the first light input edge. The illumination assembly of claim 33, wherein the light extraction element is disposed in a light output region of the light guide, and the mixed light is transmitted from the dispersion region into the light output region. A lighting assembly according to claim 33, wherein the dispersing feature has a wall that is nominally orthogonal to the major surface of the light guide. The lighting assembly of claim 38, wherein the dispersing feature extends through the light guide between the first major surface and the second major surface. A lighting assembly as in claim 38, wherein the dispersing feature extends from the at least one major surface halfway through the light guide. A lighting assembly according to claim 40, wherein some of the dispersing features extend halfway from the first major surface through the light guide and some of the discrete features extend from the second major surface halfway through the light guide. Such as the application of the lighting component of the scope of the 38th item, which features scattered features It is open. The illumination assembly of claim 38, wherein the dispersion feature is filled with a material having a refractive index different from that of the light guide. A light bulb comprising: the illumination assembly of claim 33, the light guide further comprising a proximal end and a distal end; and a cover at a proximal end of the light guide that maintains the light guide, the first light source, and the second light source. A light bulb of claim 44, wherein the first light input edge is adjacent to the cover. A light bulb of claim 45, wherein the first light input edge is along a proximal edge of the light guide and the second light input edge is along a portion orthogonal to the edge of the proximal edge. A light bulb according to claim 46, wherein the second light input edge comprises a portion separated from each other by the first light input edge. A light bulb according to claim 44, wherein the cover comprises a base constructed to mechanically mount the light bulb and receive power. A light bulb as claimed in claim 48, wherein the substrate comprises an Edison spiral substrate. For example, the bulb of claim 44, wherein the bulb conforms to the outer envelope of the A19 bulb. A light bulb comprising: a first lighting assembly according to claim 33; a second lighting assembly according to claim 33, first and second The light guide of the illumination assembly includes a proximal end and a distal end; and a cover at a proximal end of the light guide that maintains the light guide of the illumination assembly and the first and second light sources; wherein the second light source of the first illumination assembly is configured Between the individual side edges of the light guide of a lighting assembly and the light guide of the second lighting assembly. A lighting assembly comprising: a first light guide comprising a first major surface, a second major surface, a proximal end, a distal end, a light input edge at the proximal end, a light extraction element at the at least one major surface; a first light source Illuminating the edge of the first light guide with white light having a first spectrum such that white light is transmitted to the first light guide by total internal reflection, and at least part of the white light is passed through the first major surface by the light extraction element a first light guide extraction; a second light source that provides auxiliary light having a second spectrum that is narrower than the first spectrum; and a second, elongated light guide that includes a light output surface, a proximal end, a distal end, and a light at the proximal end Input edge, light extraction element, the light output surface area of the second light guide is smaller than the main surface of the first light guide, and the length thereof is equivalent to the length of the first light guide from the proximal end to the distal end, and the second light guide is configured relative to the first a light output surface of a second major surface of the light guide to direct auxiliary light extracted from the second light guide toward the second major surface of the first light guide via the light output surface, and at least a portion of the auxiliary light passes through the first light guide And mixed to white light output, so the output of the lighting assembly with a combination of a first spectrum and a second spectrum of spectrum. The illumination assembly of claim 52, wherein the light input edges of the first light guide and the second light guide are adjacent. A light bulb comprising: a light guide having a longitudinal axis, the light guide comprising opposing major surfaces, a proximal end, a distal end, a light input edge at the proximal end, a light extraction element at the at least one major surface; a solid state illuminator, the phase Adjacent to the light input edge to illuminate the edge of the light guide via the light input edge, the light is transmitted to the light guide by total internal reflection and extracted from the light guide by the light extraction element to provide light of the first spectrum; and a heat sink Thermally coupled to the illuminator, the heat sink includes a color adjustment surface adjacent to the light guide and radially outward from the light guide to adjust a color of light output by the light bulb, the color adjustment surface being incident on a portion of the first spectrum of light The light of the second spectrum is provided such that the color of the light output by the bulb is a combination of the first spectrum and the second spectrum. A light bulb as claimed in claim 54 wherein the fins comprise fins and the fins comprise a color adjustment surface extending parallel to the light guide. A light bulb according to claim 55, wherein the light guide is constructed to form a hollow body around the inner volume, and one of the major surfaces is the outer major surface, and the fin is positioned adjacent to the outer major surface. A light bulb according to claim 55, wherein the fin is separated from the outer major surface of the light guide by an air gap to allow cooling air to flow between the fin and the outer major surface of the light guide. A light bulb as claimed in claim 54 wherein the color adjustment surface comprises a color attenuating material. A light bulb as claimed in claim 58 wherein the color attenuating material comprises a lacquer or a coating. A light bulb as claimed in claim 58 wherein the color attenuating material comprises a narrowband absorber. A light bulb as claimed in claim 54 wherein the color adjustment surface comprises a wavelength shifting material. For example, the light bulb of claim 61, wherein the wavelength shifting material comprises a phosphor material, a luminescent material, a luminescent nano material, a quantum dot material, a conjugated polymer material, an organic fluorescent dye, an organic phosphorescent dye or a doped lanthanide system. One of the garnets of the compound. A light bulb as claimed in claim 54 wherein the light guide is cylindrical. A light bulb as claimed in claim 54 wherein the light guide is frustoconical. A light bulb as claimed in claim 54 wherein the light guide is a hollow body having an open end. A light bulb as claimed in claim 54 wherein the light guide is flat. A light bulb as claimed in claim 54 wherein the color temperature of the output light is more than 100 K lower than the light of the first spectrum. A light bulb as claimed in claim 54 wherein the color temperature of the output light is more than 1,000 K lower than the light of the first spectrum. A bulb as claimed in claim 54 additionally comprising a cover at the proximal end of the light guide, the cover maintaining a solid state illuminator, a light guide, a color tone The entire surface. A light bulb as claimed in claim 69, additionally comprising a substrate constructed to mechanically mount the bulb and receive power. A light bulb as claimed in claim 54 wherein the associated color temperature of the output light is more than 100 K lower than the light of the first spectrum. A light bulb as claimed in claim 54 wherein the associated color temperature of the output light is more than 1,000 K lower than the light of the first spectrum.