摘要:
A compact fluorescent lamp comprises a discharge tube arrangement with at least one discharge tube. The tube is formed of glass, encloses a discharge volume filled with a discharge gas and has a fluorescent phosphor coating disposed on the inner surface of the tube. The tube forms a continuous arc path and has electrodes disposed at each end of the arc path. The lamp also comprises a ballast circuit connected to the electrodes by lead-in wires and to a supply voltage by lead-out wires for controlling the current in the tube. A bulb shaped outer envelope comprises a substantially spherical portion, which encloses the tube arrangement and an elongated end portion, which encloses the ballast circuit. The end portion of the outer envelope has a neck portion with an open end on a base side for receiving a base shell. The open end of the neck portion is closed and terminated by a closing and neck reinforcing means of a material compatible with the material of the outer envelope, which has a substantially circular opening. The lead-out wires are led through the substantially circular opening to a base shell for connecting said lamp to said supply voltage through a socket.A method for manufacturing a compact fluorescent lamp as described above is also disclosed. In the proposed method the open end of the elongated portion of the outer envelope is closed and terminated with a closing and neck reinforcing means comprising a substantially circular opening for leading through the lead-out wires.
摘要:
The compact fluorescent lamp comprises a bulb shaped outer envelope enclosing a discharge tube having a coiled configuration and a ballast unit for controlling the current in the tube. The lamp further comprises at least one joint mechanical support and starting aid means for positioning the discharge tube and the ballast unit and reducing a breakdown voltage path of the discharge tube. The at least one mechanical support and starting aid means is made of an electrically conducting material and connected electrically to at least one of the electrodes. The neck portion has a retaining member, and the mechanical support and starting aid means is supported by the retaining member and clamped on the discharge tube at least at a location in a vicinity of a middle section of the arc path. The mechanical support means further comprises at least one support section to provide support against an apex of the outer envelope, and at least one fixing section for fixing of the discharge tube.
摘要:
A compact fluorescent lamp comprises a discharge tube arrangement with at least one discharge tube. The tube is formed of glass, encloses a discharge volume filled with a discharge gas and has a fluorescent phosphor coating disposed on the inner surface of the tube. The tube forms a continuous arc path and is provided with electrodes disposed at each end of the arc path. The lamp also comprises a ballast circuit mounted on a printed circuit board, which is oriented in a plane substantially parallel to the principal axis of the lamp. The ballast circuit is connected to the electrodes by lead-in wires and to a supply voltage by lead-out wires and controls the current in the tube. A bulb shaped outer envelope has a substantially spherical portion enclosing at least a part of the tube arrangement and an elongated end portion enclosing at least the ballast circuit. The end portion of the outer envelope having an open end on a base side is closed and terminated by a closing means of a material compatible with the material of the outer envelope. The ballast circuit and the discharge tube arrangement are held within the outer envelope and relative to each other in a predetermined position by a holding and protecting shield being oriented in a plane substantially perpendicular to the principal axis of the lamp and comprising a receiving and fixing portion for the discharge tube and the printed circuit board of the ballast circuit.A method for manufacturing a compact fluorescent lamp as described above is also disclosed. In the proposed method, the ballast circuit and the discharge tube arrangement are inserted into and attached to a holding and protecting shield.
摘要:
There is provided a low pressure discharge lamp, which comprises a discharge tube, a lamp base holding the discharge tube, and a base cap (6) for covering the lamp base. The base cap (6) also provides mechanical support to the discharge tube. The base cap (6) comprises tube openings (10) for receiving end parts of the discharge tube. The base cap (6) further comprises an adhesive space (14) adjacent to a tube opening (10), the adhesive space containing an amount of adhesive. The adhesive space (14) is open toward the discharge tube. The adhesive contained in the adhesive space (14) adheres to an end part of the discharge tube and thereby fixes the discharge tube to the base cap (6). The base cap comprises at least one upper transversal member (31) and at least one lower transversal member (32). The transversal members (31,32) extend substantially in a plane parallel to a plane of the tube opening (10) adjacent to the adhesive space (14). The upper and lower transversal members (31,32) limit the adhesive space (14) at least partly. There is also provided a method for manufacturing a discharge lamp with a base cap (6) described. In the method, the adhesive space is at least partly limited with the upper and lower transversal members. According to the method, ends of the discharge tube are inserted into the tube openings (10) of the base cap (6). An amount of adhesive is fed in the adhesive space (14), and the adhesive is forced to spill out from the adhesive space (14) and to contact the ends of the discharge tube. The adhesive is allowed to adhere to an end part of the discharge tube and thereby the discharge tube is fixed to the base cap (6). A base cap (6) having an upper and lower transversal member (31,32) as above is also claimed.
摘要:
A compact fluorescent lamp comprises at least one discharge tube (2) convoluted to have discharge tube legs substantially parallel to a longitudinal axis. At least two of the discharge tube legs include lead-in-wires (6). The lamp also comprises a plastic cap (4) which is a hollow body defined by a cover wall (42) receiving the discharge tube legs through holes (26) formed therein and a side wall (44). A bonding material is applied between the discharge tube legs and an inside portion of the cover wall (42) of the plastic cap (4). The bonding material requires a heat treatment for setting. A ballast circuitry is located at least partly on a circuit board (22). A plastic insert piece (12) is disposed in the plastic cap for holding the circuit board (22) substantially perpendicularly to the longitudinal axis at a distance from the discharge tube legs. The lamp further comprises a base housing (28) which includes a base shell (30) and connects to the side wall (44) of the plastic cap (4).
摘要:
An electric lamp comprises an inner assembly including a light source and a control gear circuit. An outer envelope encloses the light source and at least a part of the control gear and has a predetermined wall thickness and an end portion. The outer envelope is comprised of two parts separated along a circumferential line. The two parts of the envelope are connectable and sealable to form a uniform outer envelope with a seal region. The seal region has a wall thickness and is merged in a surface portion of the two parts of the envelope so that the surface unevenness of the seal region is not greater than 0.5 millimeters, and the maximum difference of the wall thickness of the seal region with respect to the wall thickness of the outer envelope is not greater than 0.3 millimeters.A method for manufacturing an electric lamp as described above is also disclosed. During connecting, and sealing the two parts of the envelope by a welding process, the two parts are brought into a contacting position and compressed further by a first axial distance; and then the two parts are pulled apart from each other by a second axial distance in order to merge the seal region in a surface portion of the two parts, wherein the second axial distance is larger than the first axial distance.
摘要:
A low pressure arc discharge lamp with an end-of-life structure is described. The lamp has a discharge tube with sealed ends, and the sealed ends contain a filament for forming a discharge arc. The filament is supported by lead-in wires. The discharge lamp further comprises a connecting element made of an insulating material which transversely connects the lead-in wires within the discharge tube. The transverse dimension of the connecting element is chosen so as not to allow the discharge arc beyond the connecting element upon end-of-life of the discharge lamp.