A light bulb includes a light emitting device at the base of the bulb and a light guide (320) that guides the emitted light to a diffusion element (330) above the base of the bulb. The diffusion element is configured to diffuse the light so as to emulate the predominantly radial light distribution p
A light bulb includes a light emitting device at the base of the bulb and a light guide (320) that guides the emitted light to a diffusion element (330) above the base of the bulb. The diffusion element is configured to diffuse the light so as to emulate the predominantly radial light distribution pattern produced by a candle. A variety of features for the diffusion element, as well as features of the base and bulb, are presented that enhance the candle-like effects.
대표청구항▼
1. A light bulb comprising: a base in which a light emitting device is situated,a light guide that is configured to guide light emitted from the light emitting device toward an interior of the light bulb, anda diffusion element, having a continuous top surface, that is configured to receive the ligh
1. A light bulb comprising: a base in which a light emitting device is situated,a light guide that is configured to guide light emitted from the light emitting device toward an interior of the light bulb, anda diffusion element, having a continuous top surface, that is configured to receive the light from the light guide and reflect and diffuse the light such that a light output in an upward direction from the diffusion element at a perimeter area of the continuous top surface of the diffusion element is substantially brighter than at a center area of the continuous top surface of the diffusion element,wherein the light is output from the light bulb predominantly in a radial direction relative to the central axis of the light bulb. 2. The light bulb of claim 1, including an envelope that includes a surface that is curved such that a reflection of the light emitted by the diffusion element on the surface of the envelope is substantially teardrop shaped. 3. The light bulb of claim 2, wherein a lower section of the reflection appears significantly brighter than an upper section of the reflection. 4. The light bulb of claim 1, wherein a perimeter of the diffusion element is substantially brighter than an interior of the diffusion element. 5. The light bulb of claim 1, wherein the diffusion element includes diffusion material within a cavity in the light guide. 6. A light bulb comprising: a base in which a light emitting device is situated,a light guide that is configured to guide light emitted from the light emitting device toward an interior of the light bulb, anda diffusion element, having a continuous top surface, that is configured to receive the light from the light guide and reflect and diffuse the light such that a light output in an upward direction from the diffusion element at a perimeter area of the continuous top surface of the diffusion element is substantially brighter than at a center area of the continuous top surface of the diffusion element,wherein the light is output from the light bulb predominantly in a radial direction relative to the central axis of the light bulb,wherein the diffusion element is separate from the light guide. 7. The light bulb of claim 6, wherein the diffusion element includes an irregular surface. 8. The light bulb of claim 1, wherein the diffusion element includes a conic shape. 9. The light bulb of claim 8, wherein the diffusion element includes a cylindric shape. 10. The light bulb of claim 1, wherein the base includes a reflective layer that surrounds a lower section of the light guide. 11. The light bulb of claim 1, wherein the base includes a reflective layer below the light guide. 12. The light bulb of claim 1, wherein the diffusion element is a specular mirror reflector. 13. The light bulb of claim 1, wherein the diffusion element is a diffuse scattering reflector. 14. The light bulb of claim 1, wherein the diffusion element includes a reflective or semi-reflective coating. 15. A light bulb comprising: a base in which a light emitting device is situated,a light guide that is configured to guide light emitted from the light emitting device toward an interior of the light bulb, anda diffusion element, having a continuous top surface, that is configured to receive the light from the light guide and reflect and diffuse the light such that a light output in an upward direction from the diffusion element at a perimeter area of the continuous top surface of the diffusion element is substantially brighter than at a center area of the continuous top surface of the diffusion element,wherein the light is output from the light bulb predominantly in a radial direction relative to the central axis of the light bulb,wherein the diffusion element comprises a solid cylindric portion disposed on top of a solid conic portion. 16. The light bulb of claim 15, wherein the solid cylindic portion comprises the top surface that is comprised of the perimeter area and the center area. 17. The light bulb of claim 1, wherein the diffusion element comprises a solid structure of diffusing material.
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이 특허에 인용된 특허 (6)
Eric J. Tarsa ; Brian Thibeault, High output radial dispersing lamp using a solid state light source.
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