Electric lamp
First Claim
1. An electric lamp comprising:
- a bulb mounted on a socket,cooling means for cooling the lamp during operation,a semiconductor light source arranged inside the bulb,a lamp axis extending through a central end of the socket and a central extremity of the bulb,the bulb having an outer surface comprising a light transmittable surface for transmitting light originating from the light source during operation of the lamp,wherein both the cooling means and the light transmittable surface are spread over the bulb outer surface, such that for an imaginary set of two planes, of which a first plane extends parallel to the axis and a second plane extends perpendicular to the axis, a position of said planes can be found in which at least one of said two planes crosses at least two times a boundary between the cooling means and the light transmittable surface;
said cooling means extending from inside the bulb to the outer surface of the bulb;
said light transmittable surface divided into sub-areas by the cooling means;
each of said sub-areas forming one integral light transmittable surface wherein the sub-areas and the cooling means are arranged in an alternating and interdigitated configuration extending axially over the length of the bulb;
each sub-area surrounded by a respective part of the cooling means and each of said sub-areas separated by at least two axially extending cooling arches.
4 Assignments
0 Petitions
Accused Products
Abstract
A bulb-type LED lamp (1) has a bulb (3) mounted on a socket (5). A light source (7), comprising a plurality of LEDs mounted on a PCB (9), is arranged inside the bulb (3). The PCB (9) acts as and/or is connected to cooling means (21). The outer surface (15) of the bulb is formed both by light transmittable surface (22) and/or sub-areas (23) thereof and the cooling means (21), which cooling means extend from inside the bulb into the outer surface of the bulb. Surfaces are mutually flush at locations at the outer surface of the bulb where said surfaces of both the cooling means and the light transmittable sub-areas border each other. The spatial light intensity distribution of the lamp of the invention is significantly improved over the prior art bulb-type LED lamp.
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Citations
14 Claims
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1. An electric lamp comprising:
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a bulb mounted on a socket, cooling means for cooling the lamp during operation, a semiconductor light source arranged inside the bulb, a lamp axis extending through a central end of the socket and a central extremity of the bulb, the bulb having an outer surface comprising a light transmittable surface for transmitting light originating from the light source during operation of the lamp, wherein both the cooling means and the light transmittable surface are spread over the bulb outer surface, such that for an imaginary set of two planes, of which a first plane extends parallel to the axis and a second plane extends perpendicular to the axis, a position of said planes can be found in which at least one of said two planes crosses at least two times a boundary between the cooling means and the light transmittable surface; said cooling means extending from inside the bulb to the outer surface of the bulb; said light transmittable surface divided into sub-areas by the cooling means; each of said sub-areas forming one integral light transmittable surface wherein the sub-areas and the cooling means are arranged in an alternating and interdigitated configuration extending axially over the length of the bulb; each sub-area surrounded by a respective part of the cooling means and each of said sub-areas separated by at least two axially extending cooling arches. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification