EP2785145A2 - Verfahren zur Ansteuerung von LED-Chips mit verschiedenen Spezifikationen - Google Patents
Verfahren zur Ansteuerung von LED-Chips mit verschiedenen Spezifikationen Download PDFInfo
- Publication number
- EP2785145A2 EP2785145A2 EP14160490.0A EP14160490A EP2785145A2 EP 2785145 A2 EP2785145 A2 EP 2785145A2 EP 14160490 A EP14160490 A EP 14160490A EP 2785145 A2 EP2785145 A2 EP 2785145A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- current
- voltage
- driving
- led chip
- setting
- 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.)
- Withdrawn
Links
Images
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
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
- H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
Definitions
- the present invention relates generally to driving LED, and more particularly to a method of driving LED chips of different specifications.
- a LED illuminating device typically includes a LED chip and a driving apparatus, wherein the driving apparatus provides power to drive the LED chip.
- the driving apparatus provides power to drive the LED chip.
- LED chips there are various types of LED chips in the current market, and LED chips of different specifications may individually have different rated voltages and rated currents.
- a driving apparatus merely fits one specific specification, and therefore could drive only one type of LED chips.
- the inventory pressure of driving apparatuses is high. And given that manufacturers have to produce driving apparatuses to drive each type of LED chips, the quantities of each type of driving apparatuses is limited, and therefore the price and the manufacturing cost is hardly lowered. If a method of driving LED chips of different specifications can be provided, the inventory pressure and the manufacturing cost of driving apparatuses will be effectively reduced.
- the primary objective of the present invention is to provide a method of driving LED chips, wherein the LED chips have different specifications.
- the present invention provides a method of supplying a method of driving LED chips, wherein the LED chips have different specifications, which include the steps of: A. defining a plurality of setting currents; B. connecting a LED chip; C. selecting one of the setting currents which matches a rated current of the LED chip; and D. providing power with the selected setting current to the LED chip.
- the method of driving LED chips could be applied to drive LED chips of different specifications, which effectively improves the inconvenience of the conventional driving apparatus that it could be only compatible with LED chips of one specific specification.
- FIG. 1 A driving apparatus 1 for driving LED (light emitting diode) chips of different specifications of a first embodiment of the present invention is shown in FIG. 1 , which includes a driving unit 10, a voltage measuring unit 20, a processing unit 30, and a control unit 40.
- the driving unit 10 electrically connects a power source 50 to a LED chip 60, wherein the driving unit 10 receives power from the power source 50, and outputs a driving voltage and a driving current to the LED chip 60.
- the driving unit 10 is controllable to change the driving voltage and the driving current.
- the design of the driving unit 10 could be based on PWM, half-bridge, buck, or boost circuits.
- the voltage measuring unit 20 is electrically connected to the driving unit 10 to measure the driving voltage outputted to the LED chip 60 from the driving unit 10.
- the processing unit 30 is electrically connected to the voltage measuring unit 20, and the processing unit 30 is electrically connected to the driving unit 10 through the control unit 40.
- the processing unit 30 has a memory.
- the aforementioned driving apparatus 1 could be used to apply a method of driving LED chips of different specifications.
- 5 LED chips with different specifications for explanation purpose which respectively have a rated voltage and a rated current of 45V/500mA, 38V/700mA, 34V/900mA, 20V/1500mA, and 14V/1400mA, and any one of said LED chips could be connected to the driving unit 10 to be the LED chip 60.
- a voltage of each said LED chips is measured first while they are operating with a testing current, wherein the testing current is lower than rated currents of all the LED chips, and the testing current is a constant current. It may get a voltage when said LED chip is operating with the testing current, and this voltage is defined as a reference voltage, and the reference voltages of said LED chips are different from each other.
- the method of driving the LED chips includes the following steps:
- the driving apparatus 1 when the LED chip 60 is connected to the driving apparatus 1, the rated current of the LED chip 60 could be automatically detected, and therefore the driving apparatus 1 could provide the power which meets the requirement of the LED chip 60. In other words, the driving apparatus 1 could deal with LED chips of different specifications.
- each setting current corresponds to a reference voltage
- each setting current corresponds to a reference voltage segment in a second preferred embodiment of the present invention.
- FIG. 4 The flow chart of the second preferred embodiment of the present invention shown in FIG. 4 has roughly the same steps with the first embodiment, and the differences are described as followings.
- step A a plurality of reference voltage segments and a plurality of current parameters are defined in the database in advance, wherein each reference voltage segment relates to one of the current parameters.
- the driving apparatus 1 has a plurality of different setting currents, and each setting current corresponds to one of the reference voltage segments.
- the driving unit 10 is controlled to output the testing current to the LED chip 60, and the voltage of the LED chip 60 is measured at the same time.
- the current parameter which relates to that reference voltage segment is obtained from the database, and therefore the corresponding setting current is then selected.
- the driving unit 10 is controlled to output the driving current as the selected setting current, which equals the rated current of the LED chip 60.
- the driving unit 10 automatically regulates the driving voltage depending on the electronic properties of the LED chip 60, and therefore the power provided to the LED chip 60 could successfully fit its specification.
- an output curve of the driving apparatus 1 is shown in FIG. 5 .
- any LED chip as long as its rated current matches the five currents in FIG. 5 while its rated voltage falls in the corresponding reference voltage segment, such LED chip could be powered by the driving apparatus 1. Therefore, the driving apparatus 1 could be applied to drive more types of LED chips, not just the 5 LED chips provided in the first embodiment.
- zero voltage is included in one of the reference voltage segments in the database.
- the driving voltage is measured as zero in the step C, there is still a corresponding setting current.
- control unit 40 transmits a voltage restriction signal to the driving unit 10 when the driving voltage measured by the voltage measuring unit 20 is higher than an upper limit voltage in the step D. After the driving unit 10 receives the voltage restriction signal, the driving voltage outputted to the LED chip 60 is maintained as the upper limit voltage. Whereby, the driving voltage outputted to the driving unit 10 wouldn't be too high to damage the LED chip 60 or the driving unit 10.
- the reference voltages, the current parameters, and the reference voltage segments in the database are stored in the memory of the processing unit 30 in the step A.
- the processing unit 30 could be a comparator circuit too.
- the reference voltage or reference voltage segment which corresponds to the driving voltage is determined by the comparator circuit in the step C.
- the comparator circuit outputs the corresponding voltage to the control unit, and the control unit transmits the corresponding current control signal to the driving unit 10 according to the received voltage. As a result, the corresponding setting current is selected.
- the driving apparatus 1 is able to drive the LED chips of different specifications, and is not limited for any specific one type of the LED chips.
- the inconvenience of the conventional driving apparatus i.e., it could only drive the LED chip of one specific specification, is effectively improved.
Landscapes
- Led Devices (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW102110957 | 2013-03-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2785145A2 true EP2785145A2 (de) | 2014-10-01 |
EP2785145A3 EP2785145A3 (de) | 2015-10-21 |
Family
ID=50349454
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14160490.0A Withdrawn EP2785145A3 (de) | 2013-03-27 | 2014-03-18 | Verfahren zur Ansteuerung von LED-Chips mit verschiedenen Spezifikationen |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP2785145A3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3541149A1 (de) * | 2018-03-14 | 2019-09-18 | Siteco Beleuchtungstechnik GmbH | Leuchte und verfahren zur erkennung von led-modulen |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6501235B2 (en) * | 2001-02-27 | 2002-12-31 | Stmicroelectronics Inc. | Microcontrolled ballast compatible with different types of gas discharge lamps and associated methods |
DE102006056057A1 (de) * | 2006-02-28 | 2007-09-06 | Samsung Electro - Mechanics Co., Ltd., Suwon | Antriebsvorrichtung für ein farbiges LED-Hintergrundlicht |
JP5311624B2 (ja) * | 2008-05-22 | 2013-10-09 | パナソニック株式会社 | 照明点灯装置 |
JP5289471B2 (ja) * | 2011-01-21 | 2013-09-11 | 三菱電機株式会社 | 光源点灯装置及び照明装置 |
-
2014
- 2014-03-18 EP EP14160490.0A patent/EP2785145A3/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
None |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3541149A1 (de) * | 2018-03-14 | 2019-09-18 | Siteco Beleuchtungstechnik GmbH | Leuchte und verfahren zur erkennung von led-modulen |
Also Published As
Publication number | Publication date |
---|---|
EP2785145A3 (de) | 2015-10-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2785144A2 (de) | Ansteuerungsvorrichtung für LED-Chips verschiedener Spezifikationen | |
US8816600B2 (en) | Method of power and temperature control for high brightness light emitting diodes | |
US9618585B2 (en) | Adjusting device of an output voltage of a switch power supply, an adjusting method thereof and an integrated chip | |
US9456475B2 (en) | LED light source with reduced flicker | |
US20130155561A1 (en) | Over voltage protection circuit and driver circuit using the same | |
EP1701589A1 (de) | Schaltung und Verfahren zum Überwachen der Temperatur einer Leuchtdiode | |
JP5190631B2 (ja) | Led照明装置用電源システム及び給電方法 | |
US8896226B2 (en) | Constant-power power supply apparatus and method of supplying constant-power power | |
US9078322B2 (en) | Method of driving LED chips of different specifications | |
CN105848393A (zh) | 故障检测设备及方法 | |
JP2011061177A (ja) | 発光ダイオードの特性を模擬可能な電子負荷とその模擬方法 | |
US9331592B2 (en) | Topology detection | |
EP2785145A2 (de) | Verfahren zur Ansteuerung von LED-Chips mit verschiedenen Spezifikationen | |
US9420655B2 (en) | Method of driving LED chips of same power but different rated voltages and currents | |
AU2013369971B2 (en) | Automatic input impedance control | |
US20150264771A1 (en) | Method of driving led chip | |
CN114567174A (zh) | 一种ic电流电测补偿电路及其应用电路 | |
EP3566546B1 (de) | Nachrüstleuchtdiode, led, röhre zum auswechseln einer leuchtstoffröhre | |
JP6886450B2 (ja) | 電源調整システム | |
JP6131483B2 (ja) | 発光ダイオードチップ駆動方法および駆動装置 | |
EP2876978A2 (de) | Verfahren zur Ansteuerung von LED-Chips mit derselben Leistung aber unterschiedlich eingestufter Spannungen und Ströme | |
US8928250B2 (en) | Method and circuit for LED load managment | |
US10941911B1 (en) | Systems and methods for an adaptive power drive in an illumination system | |
US20170273150A1 (en) | Dynamic bleed system and method for dynamic loading of a dimmer using event driven architecture | |
US10602579B2 (en) | Method for regulating an operating current of a lighting unit and control device and motor vehicle |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
17P | Request for examination filed |
Effective date: 20140318 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: H05B 33/08 20060101AFI20150914BHEP |
|
R17P | Request for examination filed (corrected) |
Effective date: 20160420 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
17Q | First examination report despatched |
Effective date: 20170509 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20170920 |