WO2005079121B1 - Apparatus for the control of lighting and associated methods - Google Patents
Apparatus for the control of lighting and associated methodsInfo
- Publication number
- WO2005079121B1 WO2005079121B1 PCT/GB2005/000492 GB2005000492W WO2005079121B1 WO 2005079121 B1 WO2005079121 B1 WO 2005079121B1 GB 2005000492 W GB2005000492 W GB 2005000492W WO 2005079121 B1 WO2005079121 B1 WO 2005079121B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lighting
- light emitting
- voltage
- current
- controller
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims 10
- 239000004065 semiconductor Substances 0.000 claims abstract 55
- 230000032683 aging Effects 0.000 claims 3
- 230000015556 catabolic process Effects 0.000 claims 2
- 238000006731 degradation reaction Methods 0.000 claims 2
- 238000013021 overheating Methods 0.000 claims 2
- 238000005259 measurement Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 claims 1
Abstract
A lighting controller arranged to drive one or more light emitting semiconductors, the controller comprising a current source and/or a voltage source and a current and/or voltage sensor wherein the controller is arranged to drive the or each light emitting semiconductor using a substantially constant current or voltage and further arranged to either monitor the actual current passing through the light emitting semiconductor and the controller being arranged to monitor the voltage such that the disconnection or occurrence of faults within the or each light emitting semiconductor can be detected; or monitor the actual voltage across the light emitting semiconductor and the controller being arranged to monitor the current such that the disconnection or occurrence of faults within the or each light emitting semiconductor can be detected.
Claims
1. A lighting controller arranged to drive lighting comprising one or more light emitting semiconductors, the controller comprising a current source and/or a voltage source and a current and/or voltage sensor wherein the controller is arranged to drive the lighting using a substantially constant current or voltage and further arranged to either i: monitor the actual current passing through the lighting and the controller being arranged to monitor the voltage such that the disconnection of or occurrence of faults in at least one light emitting semiconductor within the lighting can be detected; or ii: monitor the actual voltage across the lighting and the controller being arranged to monitor the current such that the disconnection of or occurrence of faults in at least one light emitting semiconductor within the lighting can be detected.
2. A controller according to claim 1 which is arranged to control lighting comprising a plurality of light emitting semiconductors that are arranged in at least one series connected string of light emitting semiconductors.
3. A controller according to claim 2 which is arranged to control lighting comprising a plurality of strings of light emitting semiconductors.
4. A controller according to claim 3 which is capable of controlling the strings of light emitting semiconductors either individually, in groups or all strings as a whole.
5. A controller according to any preceding claim which is arranged to supply the current to the lighting by applying pulses to the lighting.
6. A controller according to claim 6 in which the pulses are on the order of roughly any of the following lengths: micro-seconds, milliseconds, thousandths of a second, hundredths or a second, tenths of a second or seconds.
7. A controller according to claim 5 or 6 in which is arranged to generate pulses roughly lms in length.
8. A controller according to any preceding claim in which the controller is arranged to drive current through the lighting and measure the resultant voltage across the lighting.
9. A controller according to claim 8 in which the controller is arranged to drive the lighting at an initial current, sense the voltage across the lighting and to subsequently ramp up the current until the voltage across the lighting reaches a predetermined level.
10. A controller according to any one of claims 1 to 7 in which the controller is arranged to apply a voltage across the lighting and measure the resultant current through the lighting.
11. A controller according to any preceding claim which is arranged to detect the disconnection of at least one light emitting semiconductor within the lighting.
12. A controller according to claim 11 which is arranged to continue to attempt to supply a current, which may be nominal, to any light emitting semiconductor that it determines has been disconnected.
13. A controller according to any preceding claim which is arranged to detect failure and/or degradation of at least one of the light emitting semiconductors within the lighting.
14. A controller according to claim 13 which is arranged to detect failure and/or degradation of the at least one of the light emitting semiconductors by measuring the voltage across the lighting and/or the current through the lighting and comparing the current and/or voltage to an initial value for that lighting.
15. A controller according to any preceding claim which is arranged to detect ageing of at least one of the light emitting semiconductors within the lighting.
16. A controller according to claim 15 which is arranged to monitor the impedance of the lighting over a period and further arranged to use a change of impedance to determine ageing of the or each light emitting semiconductor within the lighting.
17. A controller according to claim 16 in which the period is of the order of hundreds or thousands of hours .
18. A controller according to claim 15 which is arranged to use light intensity feedback to determine ageing of at least one of the light emitting semiconductors within the lighting.
AMENDED SHEET (ARTICLE 19*
19. A controller according to any preceding claim which is arranged to perform one of increasing the voltage across the lighting and increasing the current through the lighting in order to maintain the light output of the lighting at a substantially constant level.
20. A controller according to any preceding claim which is arranged to use light intensity feedback for regulation of the lighting.
21. A controller according to claim 20 in which the controller is arranged to drive current through the lighting and/or apply a voltage across the lighting and measure the resultant light intensity output by the lighting.
22. A controller according to claim 18 or 21 which is arranged to use a light intensity measurement to adjust the voltage across and/or current in the lighting in order to maintain constant intensity.
23. A controller according to any preceding claim which is arranged to monitor both the forward voltage across the or each light emitting semiconductor and the current flowing through the or each light emitting semiconductor.
24. A controller according to any preceding claim which comprises a dynamically adjustable switch mode power supply or voltage converter.
25. A controller according to any preceding claim which is arranged to detect overheating of at least one of the light emitting semiconductors within the lighting.
AMENDED SHEFT (ARTICLF 19}'
26. A controller according to claim 25 in which the controller is arranged to monitor the forward voltage of at least one of the light emitting semiconductors in order to detect overheating therein.
27. A controller according to any preceding claim in which the light emitting semiconductor is an LED.
28. A controller according to any preceding claim in combination with lighting comprising a plurality of light emitting semiconductors controlled thereby.
29. A combination according to claim 28 in which the plurality of light emitting semiconductors provide a lamp or other light emitting semiconductor light source.
30. A combination according to claim 28 or 29 in which the light emitting semiconductors are LEDs.
31. A method of controlling lighting comprising at least one light emitting semiconductor comprising: i: driving the lighting with an initial current and sensing the resulting voltage across the lighting; ii: if the resulting voltage is below a predetermined level increasing the current used to drive the lighting; and iii: repeating steps ii. and iii. until the resulting voltage equals the predetermined level.
32. A method of controlling lighting comprising one or more light emitting semiconductors comprising driving the lighting with a substantially constant current or voltage and monitoring a parameter associated with the lighting and comparing the parameter with a 35 reference to determine whether a fault is present in at least one light emitting semiconductor wherein if the lighting is driven with a substantially constant current the parameter is the voltage across the lighting and if the lighting is driven with a substantially constant voltage the parameter is the current passing through the lighting.
33. A method according to claim 31 or 32 which controls lighting comprising a plurality of light emitting semiconductors wherein the plurality of light emitting semiconductors are connected in parallel, in series or in a combination of both parallel and series.
34. A method according to any of claims 31 to 33 which drives the lighting by applying a series of pulses.
35. A method according to claim 34 in which the pulses are of roughly lms.
36. A method according to any of claims 31 to 35 which controls lighting comprising one or more LED's.
37. A program arranged to control lighting comprising at least one light emitting semiconductor wherein the program is arranged i: to generate an initial current to drive the or each light emitting semiconductor and cause the resulting voltage across the light emitting semiconductor to be sensed. ii: if the sensed voltage is below a predetermined level to cause the current driving the light emitting semiconductor to be increases; and iii: further arranged to cause steps ii and iii until the sensed voltage substantially equals the predetermined level.
AMENDED SHEET (AfTTICLE 19) Sb
38. A program arranged to control lighting comprising one or more light emitting semiconductors which is arranged to cause the lighting to be driven with a substantially constant current and further causes a parameter associated with the lighting to be monitored and compares the monitored parameter with a reference, the program using the comparison to determine whether a fault is present in at least one light emitting semiconductor of the lighting wherein if the lighting is a driven with a substantially constant current the parameter is the voltage across the lighting and if the lighting is driven with a substantially constant voltage the parameter is the current passing through the lighting.
39. A machine readable medium containing instructions which when read onto a machine cause that machine to function as the controller of any of claims 1 to 30.
40. A lighting controller substantially as described and as illustrated herein with reference to the accompanying Figures.
41. A machine readable medium containing instructions which when read onto a machine cause that machine to provide the method of any of claims 31 to 37.
42. A method of controlling one or more light emitting semiconductors substantially as described and as illustrated with reference to the accompanying Figures.
43. A machine readable medium containing instructions which provide the program of claim 37 or 38.
44. A program substantially as described and as illustrated with reference to the accompanying Figures.
45. A lighting controller arranged to drive one or more light emitting semiconductors, the controller comprising a current source and a voltage sensor wherein the controller is arranged to be connected to one or more light emitting semiconductors and to initially drive the or each light emitting semiconductor with an initial current and to sense the resulting voltage, the controller being further arranged, if the resulting voltage across the light emitting semiconductor is below a predetermined level, to increase the initial current, and in which the controller is arranged to repeat these steps until the resulting voltage substantially equals the predetermined level.
46. A method where one or more light emitting semiconductor's are driven with a voltage substantially equal to the rated voltage of the or each light emitting semiconductor comprising measuring the current flowing through the or each light emitting semiconductor, using the measured current as the rated current for the or each light emitting semiconductor and thereafter driving the or each light emitting semiconductor from a current source with the rated current.
47. A program arranged to drive one or more light emitting semiconductor's at a voltage substantially equal to the rated voltage of the light emitting semiconductor wherein the program causes the voltage flowing through the or each light emitting semiconductor to be measured, uses the measured current as the rated current for the or each light emitting semiconductor and thereafter causes the or each light emitting semiconductor to be driven by a current source at the rated current.
AhIEHDED
48. A controller arranged to drive an electrical device, the controller comprising a current source and/or a voltage source and a current and/or voltage sensor wherein the controller is arranged to drive the electrical device using a current or voltage and further arranged to either i) monitor the actual current passing through the electrical device and the controller being arranged to monitor the voltage such that the disconnection of or occurrence of faults in the electrical device can be detected; or ii) monitor the actual voltage across the electrical device and the controller being arranged to monitor the current such that the disconnection of or occurrence of faults on the electrical device can be detected
49. A controller arranged to drive one or more electrical devices, the controller comprising a current source and a voltage sensor, wherein the controller is arranged to be connected to one or more electrical devices and to initially drive the or each electrical device with an initial current and to sense the resulting voltage, the controller being further arranged, if the resulting voltage across the electrical device is below a predetermined level, to increase the initial current, and in which the controller is arranged to repeat these steps until the resulting voltage substantially equals the predetermined level.
AMHNKD SHEET (ARTICLE fift
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/464,166 US8487545B2 (en) | 2004-02-11 | 2005-02-11 | Apparatus for the control of lighting and associated methods |
| JP2006552687A JP4753885B2 (en) | 2004-02-11 | 2005-02-11 | Lighting control apparatus and related control method |
| EP05717728.9A EP1719390B1 (en) | 2004-02-11 | 2005-02-11 | Apparatus for the control of lighting and associated methods |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0402974.0 | 2004-02-11 | ||
| GBGB0402974.0A GB0402974D0 (en) | 2004-02-11 | 2004-02-11 | Apparatus for the control of lighting and associated methods |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO2005079121A2 WO2005079121A2 (en) | 2005-08-25 |
| WO2005079121A3 WO2005079121A3 (en) | 2005-11-17 |
| WO2005079121B1 true WO2005079121B1 (en) | 2006-01-19 |
Family
ID=32011694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/GB2005/000492 WO2005079121A2 (en) | 2004-02-11 | 2005-02-11 | Apparatus for the control of lighting and associated methods |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8487545B2 (en) |
| EP (1) | EP1719390B1 (en) |
| JP (1) | JP4753885B2 (en) |
| CN (1) | CN1947465A (en) |
| GB (1) | GB0402974D0 (en) |
| WO (1) | WO2005079121A2 (en) |
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| EP1843639A1 (en) * | 2006-04-06 | 2007-10-10 | Kwang Yang Motor Co., Ltd. | LED car lamp apparatus |
| AT504949B1 (en) * | 2007-02-20 | 2008-11-15 | Zizala Lichtsysteme Gmbh | CIRCUIT ARRANGEMENT FOR DETECTING A SHORT-CIRCUIT OF LUMINOUS DIODES |
| EP2094030B1 (en) * | 2008-02-21 | 2012-06-20 | STMicroelectronics Srl | Method for testing the operating conditions of an electric network and apparatus using said method |
| KR101473366B1 (en) * | 2008-03-05 | 2014-12-17 | 삼성디스플레이 주식회사 | Method for driving a light source, light source apparatus for performing the method, and display apparatus having the light source apparatus |
| US20100045190A1 (en) * | 2008-08-20 | 2010-02-25 | White Electronic Designs Corporation | Led backlight |
| US9404961B2 (en) * | 2008-12-09 | 2016-08-02 | Covidien Lp | System and method of determining light source aging |
| DE102009029930B3 (en) * | 2009-06-19 | 2010-11-25 | Heraeus Noblelight Gmbh | Method for detecting loss of LED in parallelly connected LED chains utilized in industrial processes to produce UV light for hardening adhesive, involves comparing total current value with standard value to detect loss of LEDs in LED chains |
| JP5601870B2 (en) * | 2010-04-12 | 2014-10-08 | オーデリック株式会社 | Lighting control device for organic EL panel |
| JP5537286B2 (en) | 2010-06-28 | 2014-07-02 | パナソニック株式会社 | LED lighting device |
| US8957599B2 (en) * | 2010-07-09 | 2015-02-17 | Koninklijke Philips N.V. | Supervision circuit for organic light emitting diode |
| FR2968886B1 (en) * | 2010-12-13 | 2013-05-03 | Schneider Electric Ind Sas | DIAGNOSTIC DEVICE AND METHOD FOR LIGHT EMITTING DIODE LIGHTING SYSTEM AND LIGHTING ASSEMBLY HAVING SUCH A DEVICE |
| JP5828103B2 (en) * | 2010-12-20 | 2015-12-02 | パナソニックＩｐマネジメント株式会社 | LED lighting device and lighting apparatus using the same |
| US8717194B2 (en) | 2010-12-21 | 2014-05-06 | GE Lighting Solutions, LLC | LED traffic signal compensation and protection methods |
| JP5823169B2 (en) * | 2011-05-25 | 2015-11-25 | 株式会社吉田製作所 | Illuminated dental handpiece |
| AU2012238246B2 (en) * | 2011-10-07 | 2014-07-31 | Schneider Electric South East Asia (Hq) Pte Ltd | Light emitting diode load protection circuit |
| PL2761978T3 (en) * | 2012-01-13 | 2016-10-31 | Led lighting unit with color and dimming control | |
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-
2004
- 2004-02-11 GB GBGB0402974.0A patent/GB0402974D0/en not_active Ceased
-
2005
- 2005-02-11 JP JP2006552687A patent/JP4753885B2/en not_active Expired - Fee Related
- 2005-02-11 CN CNA200580012327XA patent/CN1947465A/en active Pending
- 2005-02-11 WO PCT/GB2005/000492 patent/WO2005079121A2/en active Application Filing
- 2005-02-11 EP EP05717728.9A patent/EP1719390B1/en not_active Expired - Lifetime
- 2005-02-11 US US11/464,166 patent/US8487545B2/en active Active
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