High reflective substrate of light emitting devices with improved light output
First Claim
1. A light emitting device, comprising:
- a substrate;
a reflective coating comprising a transparent carrier at least partially covering said substrate, with said reflective coating being resistant to discoloration, wherein said reflective coating redirects incident light towards a lens; and
one or more light emitting diode (LED) chips on said substrate, wherein said reflective coating is configured such that the bottom portion of said one or more LED chips remains uncovered by said reflective coating, wherein said reflective coating covers less than all of at least one sidewall of said one or more LED chips.
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Accused Products
Abstract
Apparatuses and methods for producing light emitting devices maximizing luminous flux output are disclosed. In one possible embodiment, a light emitting device comprises a substrate and a reflective layer at least partially covering the substrate. The reflective layer is non-yellowing, and may be substantially light transparent. One or more light emitting diode (LED) chips are disposed on the substrate. The light emitting device may emit white light. The reflective layer may comprise a silicone carrier with light reflective particles dispersed in the silicone carrier. A light diffusion lens may also be disposed on the substrate and surrounding the LED chips. Furthermore, one or more microspheres, light scattering particles, and/or phosphor particles may be dispersed in the lens. In one possible method for producing a light emitting device, a substrate is provided. One or more LED chips are coupled with the substrate, and a high reflective, non-yellowing coating is applied on at least a portion of the top surface of the substrate. The coating comprises a carrier with reflective particles dispersed throughout.
211 Citations
32 Claims
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1. A light emitting device, comprising:
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a substrate; a reflective coating comprising a transparent carrier at least partially covering said substrate, with said reflective coating being resistant to discoloration, wherein said reflective coating redirects incident light towards a lens; and one or more light emitting diode (LED) chips on said substrate, wherein said reflective coating is configured such that the bottom portion of said one or more LED chips remains uncovered by said reflective coating, wherein said reflective coating covers less than all of at least one sidewall of said one or more LED chips. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A light emitting device, comprising:
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a substrate; a reflective coating at least partially covering said substrate, with said reflective coating being resistant to discoloration; one or more light emitting diode (LED) chips on said substrate, wherein said light emitting device comprises an LED lamp; and one or more walls with an interior surface in the light emission paths of said LED chips, said interior surfaces coated with said reflective coating.
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16. A light emitting device, comprising:
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a substrate; a stable reflective coating at least partially covering said substrate, said reflective coating comprising a silicone carrier and being resistant to discoloration, wherein said reflective coating redirects incident light towards a light diffusion lens; light reflective particles in said carrier; one or more light emitting diode (LED) chips on said substrate, wherein said stable reflective coating is configured such that the bottom portion of said one or more LED chips remains uncovered by said stable reflective coating; and said light diffusion lens on said substrate and over said LED chips; wherein said light diffusion lens comprises at least one of the group consisting of scattering particles, air bubbles, or microspheres. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A light emitting device, comprising:
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a substrate; one or more light emitting diode (LED) chips on said substrate; a light diffusion lens on said substrate and surrounding said LED chips; one or more microspheres in said light diffusion lens; and a stable reflective coating at least partially covering said substrate, said reflective coating resistant to discoloration, wherein said reflective coating redirects incident light towards the light diffusion lens, wherein said stable reflective coating is configured such that the bottom portion of said one or more LED chips remains uncovered by said stable reflective coating. - View Dependent Claims (23, 24, 26, 27)
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25. A light emitting device, comprising:
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a substrate; one or more light emitting diode (LED) chips on said substrate; a light diffusion lens on said substrate and surrounding said LED chips; one or more microspheres in said light diffusion lens, wherein said microspheres comprise hollow glass, said microspheres enhancing the light scattering and mixing of light emitted by said LED chips; and a stable reflective coating at least partially covering said substrate, wherein said reflective coating redirects incident light towards the light diffusion lens, wherein said stable reflective coating is configured such that the bottom portion of said one or more LED chips remains uncovered by said stable reflective coating.
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28. A method for producing a light emitting device, said method comprising:
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providing a substrate; mounting one or more light emitting diode (LED) chips to said substrate; and applying a reflective, discoloration resistant coating on at least a portion of the top surface of said substrate such that the bottom portion of said one or more LED chips remains uncovered by said stable reflective coating, said coating comprising a transparent carrier with reflective particles in said carrier, wherein said reflective coating redirects incident light towards a lens. - View Dependent Claims (29, 30, 31, 32)
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Specification