GB2409332A - Lamp assembly for direct connection to system wiring - Google Patents

Lamp assembly for direct connection to system wiring Download PDF

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Publication number
GB2409332A
GB2409332A GB0319044A GB0319044A GB2409332A GB 2409332 A GB2409332 A GB 2409332A GB 0319044 A GB0319044 A GB 0319044A GB 0319044 A GB0319044 A GB 0319044A GB 2409332 A GB2409332 A GB 2409332A
Authority
GB
United Kingdom
Prior art keywords
lamp
lamp assembly
connector
led
interface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0319044A
Other versions
GB0319044D0 (en
GB2409332B (en
Inventor
Richard Peter James Barton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB0319044A priority Critical patent/GB2409332B/en
Publication of GB0319044D0 publication Critical patent/GB0319044D0/en
Publication of GB2409332A publication Critical patent/GB2409332A/en
Application granted granted Critical
Publication of GB2409332B publication Critical patent/GB2409332B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/002—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips making direct electrical contact, e.g. by piercing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • H05B43/00—
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/05—Two-pole devices
    • H01R33/06—Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other
    • H01R33/09—Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other for baseless lamp bulb

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Abstract

A lamp <B>1</B> (figure 1) is hard-wired to a connector <B>2</B> through a mechanical/electrical interface <B>3</B>. The interface <B>3</B> provides mechanical support and electrical connection, and may also include additional circuit components such as resistors <B>4</B>. The connector is connected directly to the external wiring <B>5</B> without the need for any additional connectors. The lamp may be a light-emitting diode of any shape or size and the complete assembly is intended to replace the conventional combination of lamp and lampholder by a single component. Benefits include reduced component count, increased reliability, and reduced lifecycle costs for the operation of the system or machine in which it is installed.

Description

1 2409332
LAMP
Technical Field
This invention relates to lamps, and in particular to the use of solidstate lamps to replace filament lamps in a wide range of applications.
Background Art
Small filament lamps are used in a wide range of applications, including entertainment machines, electronic equipment and vehicle equipment both as indicator lamps and for more general illumination. Usually these filament lamps have a glass envelope with exposed metal terminals that make contact with electrical connections in a lampholder, which in turn is wired into an electrical circuit. Filament lamps are prone to failure after relatively short periods of operation. Such failures not only require time and resources to replace the lamps, but also mean that there are periods when the indication or illumination functions are not operational. In entertainment machines, for example, this will involve loss of revenue.
More recently, filament lamps are being replaced in some applications by solid-state lamps, usually light-emitting diodes (LEDs). As usually supplied, these LEDs cannot be used as direct replacements for filament lamps because the connections are not the same and because the voltages needed to drive an LED and a filament lamp are different. However, direct replacement LEDs are now available commercially in which the LED is permanently attached in an assembly that provides contacts directly compatible with a lampholder designed for a filament lamp. In addition, resistors and protection devices can be included within the assembly to ensure that the LED can be driven from the same voltage source that is used for the filament bulb.
These replacement LEDs are commercially successful because they are much more reliable, and also much more efficient, providing the same light output for a lower current and lower power dissipation. The use of LEDs in this way therefore reduces the cost of ownership of the system or machine in which they are installed because of reduced power requirements, reduced replacement costs, and because there is no loss of revenue or function as a result of failure.
However, the use of a lampholder has a number of disadvantages. It is usually much larger that the lamp and additional assembly operations are needed during manufacture of the machine or system. In addition, the electrical connection between the lamp and lampholder is usually only a pressure contact, and is a significant source of failure.
The use of a lampholder is only necessary for filament bulbs to allow easy replacement. This invention builds on the vastly improved reliability of solid-state lamps to make a further improvement by eliminating the lampholder. This is achieved by making a single lamp assembly that can be wired directly into the machine using a proven high reliability method. The result is a single component lamp assembly giving a lower component count and cost, increased versatility and smaller size, allowing a wider range of more efficient applications.
Description
The object of the present invention is to replace the combination of either a solid-state lamp or a filament lamp together with the lampholder or socket by a single lamp assembly. The complete assembly is a single component that comprises a lamp (usually an LED) hard wired to an insulation displacement connector (IDC) or other similar connector. Additional circuit components such as resistors or protection diodes can be included between the LED and the IDC to allow operation at different voltages. The IDC is connected directly to the external circuit wiring of the system or machine without any intermediate connectors. The lamp assembly can be fabricated to allow direct attachment to the control panel, fascia board or other part of the entertainment machine or other system.
One preferred implementation of the invention will now be described with reference to the attached figures Figure 1 is a front plan view of the complete lamp assembly Figure 2 is top plan view of the complete lamp assembly.
Figures 3a), b), c) and d) are circuit diagram of the lamp with additional circuitry that can be included in the assembly. l l
Referring to the drawings, figure 1 shows the LED 1 mounted on the insulation displacement connector 2, through a mechanical/electrical interface 3. In this implementation the LED 1 shown as a four pin (two of the pins are shown as 6) flat top device, but any other LED structure is possible. The LED 1 is soldered in this implementation to a small printed circuit board (pcb) 3 acting as the mechanicaVelectrical interface by providing mechanical support for the LED and also electrical contacts. A resistor 4 is shown soldered to the pcb in this implementation.
Other implementations are also possible in which the electrical contacts form part of the connector 2, and provide both mechanical support and electrical connection. The IDC 2 allows direct connection to the external circuit wires 5 without the need for soldering, giving a secure connection which can be made rapidly and easily. IDC connectors have proven reliability, and also provide a reproducible thermal path for controlling the temperature of the solid-state lamp.
The essential feature of the invention shown in figure 1 is that the lamp and lampholder are a single entity, giving an assembly that can be much smaller that the conventional assembly.
Figure 2 shows the top view of the assembly, where an LED chip 7 is mounted on the lead frame 8, together comprising the lamp 1. In this implementation the lead frame has four pins (two are shown as 6 in figure 1) and the LED package is flat-topped.
Other versions are also possible, including a conventional round-top LED and a two- pin lead frame.
Additional electrical circuit components can also be included within the interface 3.
Possible circuits are shown in figure 3, allowing the lamp to be used with different voltage supplies, and also providing protection in cases where the wrong polarity of voltage is accidentally applied. Figure 3a) shows the circuit symbol for the LED 9 without any additional circuit components, figure 3b) includes a voltage dropping resistor 10, figure 3c) includes a protection diode 11 and figure 3d) includes both the resistor 10 and protection diode 11. In most cases the terminals of the IDC will be marked to ensure that the correct polarity is connected to the external wiring, which in general will be colour coded.
It is understood that the embodiment described in figures 1, 2 and 3 is only one of a number of different embodiments, and is described by way of example only. Other LED lamps of different shape or number can also be used, and different sizes of IDC can also be used. s

Claims (9)

  1. Claims 1. A lamp assembly having a lamp 1 hard wired through a
    mechanical/electrical interface 3 to a connector 2 suitable for the direct connection to external circuit S wiring 5 without an additional connector.
  2. 2. A lamp assembly in which the lamp is an LED.
  3. 3. A lamp assembly in which the connector is an insulation displacement connector.
  4. 4. A lamp assembly in which resistors or other circuit elements are included in the mechanical/electrical interface.
  5. S. A lamp assembly in which the LED 1 is soldered to the IDC 2 via the interface 3.
  6. 6. A lamp assembly in which the LED 1 and the IDC 2 are connected via the interface 3 by means of crimping or other hard-wiring techniques.
    I S
  7. 7. A lamp assembly in which the thermal path between the lamp and the external wiring is controlled during manufacture.
  8. 8. A lamp assembly which is fabricated to allow direct attachment to the control panel, fascia board or other part of the entertainment machine or other system.
  9. 9. A lamp assembly according to claim 1 substantially as described with reference to and as illustrated in the attached drawings.
GB0319044A 2003-08-14 2003-08-14 Lamp assembly for direct connection to system wiring Expired - Fee Related GB2409332B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0319044A GB2409332B (en) 2003-08-14 2003-08-14 Lamp assembly for direct connection to system wiring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0319044A GB2409332B (en) 2003-08-14 2003-08-14 Lamp assembly for direct connection to system wiring

Publications (3)

Publication Number Publication Date
GB0319044D0 GB0319044D0 (en) 2003-09-17
GB2409332A true GB2409332A (en) 2005-06-22
GB2409332B GB2409332B (en) 2006-12-13

Family

ID=28052463

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0319044A Expired - Fee Related GB2409332B (en) 2003-08-14 2003-08-14 Lamp assembly for direct connection to system wiring

Country Status (1)

Country Link
GB (1) GB2409332B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009535762A (en) * 2006-04-28 2009-10-01 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Snap-on connector
CN101064403B (en) * 2006-04-27 2010-08-11 光阳工业股份有限公司 LED positioning device
US7931386B2 (en) * 2007-03-19 2011-04-26 GE Lighting Solutions, LLC Flexible LED lighting strips including overmolding encasement and attached parallel electrical conductors

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4466050A (en) * 1981-02-27 1984-08-14 Amp Incorporated Light display assembly
JPH07288342A (en) * 1994-02-23 1995-10-31 Toyoda Gosei Co Ltd Aggregate led lamp
EP1002696A2 (en) * 1998-11-17 2000-05-24 Ichikoh Industries Limited Light emitting diode mounting structure
EP1217291A2 (en) * 2000-12-21 2002-06-26 Gamesman Limited Lamps
US20020117954A1 (en) * 2001-02-28 2002-08-29 Harison Toshiba Lighting Corporation Device for mounting a light source
US20030020192A1 (en) * 2001-07-24 2003-01-30 Koito Manufacturing Co., Ltd. LED inserting holder integrated type base board and mold therefor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4466050A (en) * 1981-02-27 1984-08-14 Amp Incorporated Light display assembly
JPH07288342A (en) * 1994-02-23 1995-10-31 Toyoda Gosei Co Ltd Aggregate led lamp
EP1002696A2 (en) * 1998-11-17 2000-05-24 Ichikoh Industries Limited Light emitting diode mounting structure
EP1217291A2 (en) * 2000-12-21 2002-06-26 Gamesman Limited Lamps
US20020117954A1 (en) * 2001-02-28 2002-08-29 Harison Toshiba Lighting Corporation Device for mounting a light source
US20030020192A1 (en) * 2001-07-24 2003-01-30 Koito Manufacturing Co., Ltd. LED inserting holder integrated type base board and mold therefor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101064403B (en) * 2006-04-27 2010-08-11 光阳工业股份有限公司 LED positioning device
JP2009535762A (en) * 2006-04-28 2009-10-01 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Snap-on connector
US7766687B2 (en) 2006-04-28 2010-08-03 Koninklijke Philips Electronics N V Connector having different size recesses
US7931386B2 (en) * 2007-03-19 2011-04-26 GE Lighting Solutions, LLC Flexible LED lighting strips including overmolding encasement and attached parallel electrical conductors

Also Published As

Publication number Publication date
GB0319044D0 (en) 2003-09-17
GB2409332B (en) 2006-12-13

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Legal Events

Date Code Title Description
710B Request of alter time limits

Free format text: EXTENSION APPLICATION: APPLICATION FOR EXTENSION OF THE PERIOD(S) PRESCRIBED BY RULE(S) 25(2) FILEDON 20041117.

9110 Period prescribed has been extended under rule 110(6)/1990

Free format text: EXTENSION ALLOWED: PERIOD(S) PRESCRIBED BY RULE(S) 25(2) EXTENDED UNDER RULE 110(6) IN ACCORDANCE WITH THE DECISION OF THE COMPTROLLER DATED 20041123.

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20090814