Abstract:
The disclosed embodiments relate to a lighting device (1) comprising an exit window (2) and a light source substrate (3) arranged to carry at least one solid-state light source (4), the at least one light source (4) being arranged to emit light through the exit window (2). The exit window (2) is shaped to allow a front surface of the light source substrate (3) to be brought into physical contact with a surface of the exit window facing the light source substrate (3), and in that the light source substrate (3) is held in physical contact with the exit window (2), thereby enabling thermal contact between the light source substrate (3) and the exit window (2). Since thermal contact between the exit window and the light source substrate is secured, the heat transfer of the lighting device will be improved.
Abstract:
A lamp is provided, the lamp comprising a one piece envelope (102) mounted on a base (104), an internal structure (106) arranged within the envelope (102), the internal structure (106) comprising a stem (108) extending from the base (104), a solid state light source (110) arranged on the stem (108), and a screen (112, 212) obscuring at least a portion of light emitted from the solid state light source (110) such that light emitted from the solid state light source (110) is diffused by the screen (112, 212), wherein the stem (108) is arranged to support the screen (112, 212), wherein the screen (112, 212) is arranged to adopt a collapsed state such that the screen (112, 212) is passable through a base opening (115) of the envelope (102) and an un-collapsed state (116) such that the screen (112, 212) is impassable through the base opening (115) of the envelope (102).
Abstract:
The present invention relates to an end cap (104) for a tubular light source the tubular light source configured to be arranged in a lighting fixture comprising a socket, wherein the end cap (104) comprises a housing portion having a connection end, two connector pins (116) at least partly arranged on an outside of the housing portion at the connection end, wherein the connector pins (116) are configured to fit in the sockets of the lighting fixture, a first spring loaded switching element (110) configured to be alternately positioned in an actuated state and a non-actuated state, wherein the first spring loaded switching element (110) protrudes at the connection end of the housing portion in the vicinity of the connector pins (116) when positioned in its non-actuated state, and a second spring loaded switching element (112) configured to be positioned in an actuated state and a non-actuated state, wherein the switching elements (110, 112) are configured to be individually positioned in their respective actuated states to form an electrical connection between the socket and the tubular light source when the end cap (104) is mounted into the socket of the fixture.
Abstract:
The invention provides an illumination device comprising an envelope enclosing a light source, preferably a LED, and a luminescent material. The envelope comprises a transmissive part, and a reflective part, wherein the reflective part comprises a reflective ceramic material. The ceramic material can be used for heat dissipation.
Abstract:
An illumination device (100) is disclosed, comprising at least two light sources (110), each of which is arranged to emit light, a carrier (120), having a first side (122) and a second side (124), wherein the at least two light sources are coupled to the first side of the carrier, and an envelope at least partially enclosing the light sources and the carrier. At least one of the light sources is coupled to a first portion (126) of the carrier and a least another one of the light sources is coupled to a second portion (128) of the carrier, wherein the first and second portions of the carrier are different, and the carrier is arranged such that the second side of the first portion of the carrier at least partially faces the second side of the second portion of the carrier. Thereby the light sources may be directed to emit light in several directions so as to increase the angle interval of the light emitted by the illumination device with the light sources being mounted e.g. on a single side of a single carrier, which may enable a reduced number of components and facilitated assembly. A luminaire comprising the illumination device, and a method of manufacturing such a device, are also disclosed.
Abstract:
The present invention relates to an optical arrangement (1) having an optical axis (X) and comprising a base member (70), a cup shaped reflector (10) having an inner surface (12) facing towards the optical axis, at least one solid state light source (40, 42) arranged at the optical axis on the base member, and a lens comprising a center lens portion (20) and an annular lens portion (30), and arranged in front of the at least one solid state light source in a light exit direction. The center lens portion has a dome shaped outer surface (22) and the annular lens portion has an outer surface (32) with a convex shape facing the inner surface of the reflector. The reflector and the lens are formed together as one solid piece of material.
Abstract:
A lighting device (1) is provided comprising at least one light source (3), a wavelength converting element (8) adapted to convert a wavelength of light emitted by the at least one light source, at least one support (7) arranged to support the wavelength converting element remote from the at least one light source, and an envelope (2) adapted to enclose the wavelength converting element and at least a portion of the at least one support. The at least one support is arranged to be able to pivot relative to the wavelength converting element. The present lighting device enables using a rigid wavelength converting element and an at least partially rigid support, as these two components may be moved relative to each other for facilitating insertion of the unit in the envelope.
Abstract:
According to an aspect there is provided a base for an electric lamp which may be assembled in an efficient and convenient manner. The base comprises: a tubular enclosure (2) extending along an axial direction between a first and a second end portion of the enclosure, an insulator (4) attached to the first end portion of the enclosure such that a rotation of the insulator relative to the enclosure about the axial direction is prevented, the insulator having an inner portion (4b) facing towards an inner space of the enclosure, an outer portion (4a) facing away from said inner space and at least one channel for receiving an electrically conducting contact pin (5), the channel extending from the outer portion, through the insulator and leading into said inner space, and a housing (3) for accommodating electrical circuitry (11) for operating the electric lamp, wherein an end portion (5a) of the electrically conducting contact pin (5) has a lateral projection or recess being adapted to engage with an engagement portion (3 c) of the housing such that a separation between the insulator and the housing is prevented in at least said axial direction, and wherein the housing is attached to the inner portion of the insulator such that a rotation of the housing relative to the insulator about the axial direction is prevented, wherein a rotation of the housing relative to the enclosure is prevented.
Abstract:
The present invention relates to a tubular lighting device (1) comprising a light engine (10) and a flexible material sheet (11) wrapped around said light engine (10) such that a tubular housing enclosing said light engine (10) is formed. The application further discloses an apparatus and method for assembling such a tubular lighting device (1).
Abstract:
A LED light source comprises: a first rectifier with a first and a second input terminal for connection to an AC supply voltage source and a first and a second output terminal connected by a first LED-string, a second rectifier having a first and a second input terminal and output terminals, said first input terminal of said second rectifier being coupled to the first input terminal of the first rectifier and the second input terminal of the second rectifier being coupled to the second input terminal of the first rectifier, and the output terminals being connected by a second LED-string, and means for causing a phase shift between the voltages that are present during operation at the output terminals of the first rectifier and the output terminals of the second rectifier respectively. The LED strings are driven by very simple circuitry that can be supplied by mains supply voltage. Due to the phase shift stroboscopic effects are suppressed.