GB2412255B - Light emitting device - Google Patents

Light emitting device

Info

Publication number
GB2412255B
GB2412255B GB0405848A GB0405848A GB2412255B GB 2412255 B GB2412255 B GB 2412255B GB 0405848 A GB0405848 A GB 0405848A GB 0405848 A GB0405848 A GB 0405848A GB 2412255 B GB2412255 B GB 2412255B
Authority
GB
United Kingdom
Prior art keywords
light emitting
emitting device
light
emitting
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.)
Expired - Fee Related
Application number
GB0405848A
Other versions
GB0405848D0 (en
GB2412255A (en
Inventor
Ian Harwood
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.)
Eaton Electrical Systems Ltd
Original Assignee
Cooper Lighting and Security Ltd
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 Cooper Lighting and Security Ltd filed Critical Cooper Lighting and Security Ltd
Priority to GB0405848A priority Critical patent/GB2412255B/en
Publication of GB0405848D0 publication Critical patent/GB0405848D0/en
Publication of GB2412255A publication Critical patent/GB2412255A/en
Application granted granted Critical
Publication of GB2412255B publication Critical patent/GB2412255B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/44—Testing lamps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/02—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which an auxiliary distribution system and its associated lamps are brought into service
    • H05B33/0881—
    • H05B37/03—

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
GB0405848A 2004-03-16 2004-03-16 Light emitting device Expired - Fee Related GB2412255B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0405848A GB2412255B (en) 2004-03-16 2004-03-16 Light emitting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0405848A GB2412255B (en) 2004-03-16 2004-03-16 Light emitting device

Publications (3)

Publication Number Publication Date
GB0405848D0 GB0405848D0 (en) 2004-04-21
GB2412255A GB2412255A (en) 2005-09-21
GB2412255B true GB2412255B (en) 2006-11-08

Family

ID=32117754

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0405848A Expired - Fee Related GB2412255B (en) 2004-03-16 2004-03-16 Light emitting device

Country Status (1)

Country Link
GB (1) GB2412255B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008034524B4 (en) 2008-07-24 2019-12-05 Tridonic Gmbh & Co Kg emergency pack

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2723631A1 (en) * 1976-05-25 1977-12-01 Hasselblad Ab Victor Automatic lamp switch-over for projector - comprises 2 lamps on servo-controlled slider with first monitored by photocell to switch in second on failure
GB2258571A (en) * 1991-05-03 1993-02-10 Protec Fire Detection Plc Testing emergency lighting systems
GB2341017A (en) * 1998-08-25 2000-03-01 George Alan Limpkin Substituting defective light sources

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2723631A1 (en) * 1976-05-25 1977-12-01 Hasselblad Ab Victor Automatic lamp switch-over for projector - comprises 2 lamps on servo-controlled slider with first monitored by photocell to switch in second on failure
GB2258571A (en) * 1991-05-03 1993-02-10 Protec Fire Detection Plc Testing emergency lighting systems
GB2341017A (en) * 1998-08-25 2000-03-01 George Alan Limpkin Substituting defective light sources

Also Published As

Publication number Publication date
GB0405848D0 (en) 2004-04-21
GB2412255A (en) 2005-09-21

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20181115 AND 20181130

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20220316