WO2015051590A1 - Drive method applied to light-emitting diode chip with same power but different voltage and current specifications - Google Patents

Drive method applied to light-emitting diode chip with same power but different voltage and current specifications Download PDF

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Publication number
WO2015051590A1
WO2015051590A1 PCT/CN2014/000807 CN2014000807W WO2015051590A1 WO 2015051590 A1 WO2015051590 A1 WO 2015051590A1 CN 2014000807 W CN2014000807 W CN 2014000807W WO 2015051590 A1 WO2015051590 A1 WO 2015051590A1
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value
current
driving
voltage
power
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PCT/CN2014/000807
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French (fr)
Chinese (zh)
Inventor
林铭锋
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东林科技股份有限公司
林铭锋
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B33/00Electroluminescent light sources
    • H05B33/02Details
    • H05B33/08Circuit arrangements not adapted to a particular application
    • H05B33/0803Circuit arrangements not adapted to a particular application for light emitting diodes [LEDs] comprising only inorganic semiconductor materials
    • H05B33/0842Circuit arrangements not adapted to a particular application for light emitting diodes [LEDs] comprising only inorganic semiconductor materials with control
    • H05B33/0845Circuit arrangements not adapted to a particular application for light emitting diodes [LEDs] comprising only inorganic semiconductor materials with control of the light intensity
    • H05B33/0848Circuit arrangements not adapted to a particular application for light emitting diodes [LEDs] comprising only inorganic semiconductor materials with control of the light intensity involving load characteristic sensing means

Abstract

A drive method applied to light-emitting diode chips with same power but different voltage and current specifications comprises the following steps: setting a preset power value; providing a light-emitting diode chip matching the preset power value; acquiring a working current value required by the light-emitting diode chip when the light-emitting diode chip satisfies the preset power value; inputting a drive current to the light-emitting diode chip, and enabling a current value of the drive current to maintain the working current value. In this way, the drive method can be used to drive any light-emitting diode chip with the same rate power but a different rated voltage and rated current specification.

Description

Power applied to the same voltage and current specifications of the different LED chip driving method FIELD

The present invention is related to LED driving, and more particularly to means a voltage applied to the same power but with different specifications of the current driving method of the light emitting diode chip.

Background technique

Press, the LED illumination apparatus comprises a light emitting diode chip and the drive means, the drive means for providing the light-emitting diode chips required power; current market standard LED chip array, the light-emitting diode chips with the same power in terms of , a combination type rated current and the rated voltage range, the light emitting diode chip to 28W for example, combinations of the rated voltage and rated current that is a combination of 80V / 350mA, 56V / 500mA, 40V / 700mA, etc. Therefore, in order to drive such a specifications combined light emitting diode chip, the current approach is for each LED chip to develop a light-emitting diode chip driver; however, for the manufacturer of LED lighting device, the power of each light emitting diode chips means for producing a plurality of drive required, not only increasing the pressure of the stock driving apparatus, but not in an amount of system price, resulting in high manufacturing costs; if any one of the developers applicable to the same power but different rated voltage and rated current of the light emitting diode chip in combination the driving method, when the light emitting diode can be reduced Stock pressure actuated device chip, and reduce the manufacturing cost.

SUMMARY

In view of this, the main object of the present invention to provide a method of driving the light emitting diode chip power of different voltage and current applied to the same specifications, the same is applicable to any one of the drive power but with different voltage rating and current combinations of LED chip, and controlling the power supply input to the light emitting diode chip is maintained in a preset range.

Object of the present invention adopts the following technical solution to achieve. The method of driving the light emitting diode chip applied to the same power of different voltage and current specifications of the present invention is provided, comprising the following steps: A set a default power value; B LED chip provided with the predetermined power value match; C.. the required time to obtain the LED chip matches the preset power value of the operating current value;. D output for the driving current to the LED chip, and the driving current value of the current to the operating current value is maintained.

Further object of the present invention the following technical measures may be employed to achieve further.

The method of driving the light emitting diode chip power applied to the same voltage and current specifications of the different, wherein the driving current for input to the light emitting diode chip is provided by a drive means; the predetermined power value of the predetermined driving means for driving the light emitting diode chip power; step a, the preset power value is preset in the driving device.

The method of driving the light emitting diode chip power applied to the same voltage and current specifications of the different, wherein prior to step A includes a plurality of different power values ​​previously set in the drive apparatus, in step A, by said plurality wherein power values ​​selected for one of preset power value.

The method of driving the light emitting diode chip power applied to the same voltage and current specifications of the different, wherein the light emitting diode chip in Step B provided for the rated power of between 90% to 110% between the preset power value.

It is applied to the light emitting diode chip driving method of the same of different voltage and current specifications of the power, wherein the step C, is output for the driving current to the LED chip and the driving current value of the current is smaller than the value of the operating current starting current value gradually increases, while the detected value of the driving voltage supplied to the output voltage of the light emitting diode chip, and calculates the product of the voltage value of the driving voltage and the current value of the driving current until the product is equal to the preset power stops increasing the current value of the driving current value, the operating current value for the product of the output current value of the driving current to the light emitting diode chip is equal to the predetermined power value.

The method of driving the light emitting diode chip power applied to the same voltage and current specifications of the different, wherein after the step D further comprises the step E, the detection output to a predetermined range for the LED chip driving power exceeds the predetermined power value when, for changing the output current value of the driving current to the LED chip, so that the supply of the drive power input to the light emitting diode chip between the preset power value of the predetermined range, wherein the driving power of the driving voltage the product of the voltage value of the current value of the driving current and the driving voltage is a supply voltage loss of the LED chip.

The method of driving the light emitting diode chip power applied to the same voltage and current specifications of the different, wherein the predetermined range of between 97% to 103% for a preset power value.

The power applied to the same voltage and current specifications of the different LED chip driving method, wherein the method of driving the light emitting diode chip applied to the same voltage and current specifications of different power, further comprising detecting the supplied driving voltage to the light emitting diode chip when the voltage is greater than the upper limit voltage value, the limit for the driving voltage to the light emitting diode chip, the voltage value of the driving voltage is maintained at the upper limit voltage value.

The method of driving the light emitting diode chip same power applied voltage and current specifications of the different, wherein the light emitting diode chip driving method of the same applied voltage and current power different specifications, further comprising detecting the driving current is supplied to the input of the LED chip when the current value is greater than the upper limit current value, the current limit for the output to drive the light emitting diode chip, the current value of the driving current is maintained at the upper limit current value.

The method of driving the light emitting diode chip power applied to the same voltage and current specifications of the different, wherein the drive means has an output port connected to the power supply to the light emitting diode chip; performed prior to step A, to provide a power supply device, and the power supply device when then, connecting the output terminal of the power supply device to an output port of the drive means, and made to detect a voltage value of the output voltage, whereby in step a; having an output terminal, and an output from the output terminal voltage , the value of the output voltage set voltage value for the preset power value; Further, after obtaining the voltage value of the output voltage in detecting, they block the output of the power supply means and an output port of the drive means electrical connection between the.

The method of driving the light emitting diode chip power applied to the same voltage and current specifications of the different, wherein prior to step A further comprises comparing the voltage to a predetermined value in the driving means; in Step A is output to the detection of the when the voltage value is greater than or equal to the comparison voltage value, the voltage value of the output voltage value set as the predetermined power value.

The method of driving the light emitting diode chip applied to the same power with different voltage specifications of the current, wherein the blocking output of the power supply device electrically connected between the output port of the drive means, is performed before step A.

The light emitting diode chip is applied to a driving method different voltage and current specifications of the same power, wherein the power supply block the output of the device electrically connected between the output port of the drive means is in the following Step A and Step C performed before.

By the above aspect, the light emitting diode chip driving method is applied to the same power of different voltage and current specifications of the present invention has at least the following advantages and beneficial effects: whereby, through the power applied to the same voltage and current specifications of the different LED chip driver a method, applicable to any of a drive having the same power but with different rated voltage and rated current of the light emitting diode chip, and maintain the output power supplied to the LED chip within the predetermined range, to effectively improve the driving apparatus can only be applied with conventional single species inconvenience LED chip specifications.

The above description is only an overview of the technical solution of the present invention, in order to more fully understood from the present invention, but may be implemented in accordance with the contents of the specification, and in order to make the aforementioned and other objects, features and advantages become more readily apparent the following Patent cited preferred embodiments accompanied with figures are described in detail below.

BRIEF DESCRIPTION OF DRAWINGS

1 a block diagram of FIG driving apparatus is applied according to a preferred embodiment of the present invention;

Flowchart of one embodiment of the present invention, FIG 2;

A block diagram of the drive apparatus is applied according to the present invention in a further embodiment of FIG. 3; and

FIG 4 a block diagram of a further embodiment of the drive device when a preset power set value embodiments of the present invention.

The main components of Legend]

1: driving means 10: drive unit

1a: Input Block 1b: output seat

20: voltage detection unit 30: current detecting unit

40: operation unit 50: control unit

60: input unit 70: power source

80: LED chip 82: power supply device

822: Output

Best Mode invention.

To further elaborate the technical means and effects the present invention is predetermined to achieve the object of the invention taken in conjunction with the accompanying drawings and the following preferred embodiments, the driving of the light emitting diode chip according to the present invention provides a power applied to the same voltage and current specifications of the different A method to specific embodiments thereof, the structure, characteristics and efficacy, as will be described in detail.

As shown in FIG. 1 by a driving device chip driving method of a light emitting diode according to a preferred embodiment of the present invention is applied, comprises an input housing 1a, the output port. IB, the drive unit 10, the voltage detection unit 20, a current detecting unit 30 calculates unit 40 and the control unit 50.

1a is electrically connected to the power input housing 70, 1b of the power supply output base 80 connected to the light emitting diode chip. After 10 electrically the driving unit is connected to the input base 1a and the output seat 1b, the LED chip 80 is electrically connected to the output base 1b, the driving unit 10 receives the power supply 70 and outputs a driving voltage and driving current to the LED chip 80. The driving unit 10 is controlled to vary the current voltage value of the driving voltage and the driving current. In practice, the driving unit 10 may be designed to use the PWM, half-bridge, Buck, Boost and other types of feeders.

20 the voltage detecting unit is electrically connected to the driving unit 10 and the output port 1b, the driving unit 10 for detecting a voltage value of the driving voltage for the loss of the LED chip 80. 30 of the current detecting unit is electrically connected to the driving unit 10 and the output port 1b, the driving unit 10 for detecting a current value of the driving current is lost for the LED chip 80.

The computing unit 40 is electrically connected to the voltage detection unit 20, the current detecting unit 30, and the computing unit 40 is connected to the driving unit 10 via the control unit 50 electrically. The arithmetic unit 40 calculates based on the current 20 and the voltage value of the measured value of the voltage detection unit 30 current detection unit, and to the driving unit 10 via the control unit 50 outputs a current control signal, thereby controlling the driving unit 10 changes the current value of the driving current.

Accordingly, using the aforementioned drive device 1 may be a light emitting diode chip driving method of the present invention, the driving method shown in FIG. 2 comprising the steps of:

A. preset power value is set in advance in the computing unit 40, the predetermined power value of the power driving device 1 lost LED chip 80 is connected for predetermined. For example, when the light emitting diode chip 80 is connected to a rated power of 28W, the preset power value is set to 28W.

B. providing a predetermined power value matching the LED chip 80, in this embodiment, the LED chip 80 is provided with the same rated power of the predetermined value of the power light emitting diode chips, for example, the following three specifications the light emitting diode chip 80,80V / 350mA, 56V / 500mA, 40V / 700mA, rated voltage and rated current neither the same, but with the same rated power (28W), which is the rated power and the predetermined power set value the same, therefore, the choice of either a specification of the LED chip 80 is connected to the driving unit 10. In practice, the choice of the light emitting diode chip 80 is between the rated power can be useful in a range between 90% to 110% of the predetermined power value, for example, the default value is a light emitting diode chip power 28W, chosen rated power 80 may be 25.2W ~ 30.8W.

C. to obtain the current value of the work required for compliance with the preset power value. In the present embodiment, the first light emitting diode chip is electrically connected 80 to the driving unit 10, the computing unit 40 controls the driving unit by sending a current control signal to the control unit 50 of the output 10 to the driving unit 10 the current value of the driving current of the light emitting diode chip 80 is gradually increased from the current value of the operating current is less than the start value, while the computing unit 4030 detects the driving voltage through the voltage detection unit 20 and the current detection unit drive voltage value and the current value of the current, and calculates the voltage value of the driving voltage and the product of the current value of the driving current (i.e., the drive power applied to the LED chip 80). Can be readily appreciated, the voltage value of the driving voltage of the light emitting diode chip 80 is with the enhancement of the current value of the driving current for driving the output unit 10 is increased, therefore, applied to the LED chip 80 drive power will also increase, until the drive power applied to the LED chip 80 reaches the preset power value stops increasing the current value of the driving current, the current value of the driving current for this occasion shall meet the predetermined power the value of the operating current value required.

D. The arithmetic unit 40 controls the driving unit 50 transmits the transmission signal to the current control unit 10 controls the current value of the driving current to the operating current value is maintained, for the driving output power in accordance with the predetermined power value to the LED chip 80, so that the LED chip 80 to achieve a given power state, in other words, the product of the voltage value and the current value of the driving current of the driving voltage at this time is maintained at a preset power value set in step a.

And after the above-mentioned procedure D, step E, to detect the driving power applied to the LED chip 80 whether the variation exceeds the predetermined range. In the present embodiment, the operation unit 40 through the voltage detection unit 20 and the current detection unit 30 continuously detects a current value supplied to the input voltage and the driving current value of the driving voltage of the LED chip 80, and product (i.e., the drive power) both calculated when the driving power exceeds the range of 97% to 103% of the predetermined power value (i.e., the predetermined power value of ± 3%), the computing unit 40 through the control unit 50 controls the driving unit 10, to increase or decrease the output current value of the driving current to the LED chip 80, so that the product once again return to the range of 97% to 103% of the predetermined power value. Accordingly, the output can be stably supplied to the driving power of the LED chip 80.

Through the above-described driving method, the drive apparatus 1 can automatically detect the LED chip 80 is connected to the operating current value is maintained to the predetermined desired power value, even if the light emitting diode and replaced with a different voltage rated current chip 80, as long as the rated power in accordance with the predetermined power value, can be useful in the driving device 1.

In an embodiment, the driving method further includes, when the voltage value detected by voltage detection unit 20 is greater than the upper voltage value, the voltage limit 50 sends a signal to the control means to limit the driving unit 10 for transmission to the the voltage value of the driving voltage of the light emitting diode chip 80 is maintained at the upper limit voltage value. When Similarly, the driving method further includes, when the current value detected by the current detection unit 30 is larger than the upper limit current value, the control unit 50 sends a current limit signal to the driving unit to limit the output to the LED chip 10 the current value of the driving current 80 is maintained at the upper limit current value. Thereby, avoid the driving of the driving voltage output unit 10 or the driving current is abnormal, resulting in damage to the LED chip 10 or the driving unit 80.

In an embodiment, before performing step A may further be a plurality of different power values ​​set in advance in the computing unit 40, and the drive apparatus 1 further comprises an input unit 60 electrically connected to the computing unit 40 (FIG. 3 reference), in step a, wherein selecting one of said plurality of transmission power value of the power input unit 60 is the predetermined value. Accordingly, the driving device 80 may be a light emitting diode chip for different power rating of the drive. In practice, the input unit 60 may be designed to use based switch, switch the user to set the predetermined power value.

In an embodiment, in addition to using the external input unit 60 to set the predetermined power value, and then provide the following alternative method to set the predetermined power value, performed before the step A comprises:

First comparison voltage value is built in the operation unit 40;

FIG provide power supply apparatus 82 shown in FIG. 4, the power supply device 82 has an output terminal 822, output terminal 82 from the output voltage 822 of the power supply device.

The output terminal 822 is connected electrically to the power supply device 82 to an output port 1b of the driving device 1.

The voltage detection unit 20 acquires the detected voltage value of the power supply device 82 of the output voltage.

Whereby, when the voltage value of the output voltage of the voltage detection unit 20 detects made greater than or equal to the comparison voltage value at the step A, the computing unit 40 the voltage detection unit 20 detects the value of the voltage value set as the predetermined power value.

Further, after obtaining the voltage value of the output voltage of the power supply device 82 in the voltage detection unit 20 detects, further comprising an output terminal 822 of the power supply apparatus 82 is removed from the output port 1b of the driving device 1, in order to the block 82 is connected to the power supply device 1, electrical connection between the driving means.

For example, when the operation unit 40 is built in comparison voltage 30V, while the original preset power value 40W, Ruoyu the preset power value is set to 32W, the output of the power supply device 82 voltage is adjusted to 32V, then the power supply device 82 is electrically connected to the drive means of the output port 1b 1, at this time, the voltage measured by the voltage detection unit 20 of the output voltage is 32V, and the computing unit 40 determining a voltage value of the output voltage is greater than the comparison voltage value (30V), and therefore the value "32" set as the default power value 32W, i.e. complete set a default power value.

Subsequently, the output terminal 822 of the power supply device 82 from the output port 1b of the driving device 1 is removed, then the step B to procedure D, can automatically detect the LED chip 80 is connected to the pre maintained operating current value is set to the desired value of power, even when replaced with a different voltage and rated current of the light emitting diode chip 80, as long as the rated power in accordance with the predetermined power value, can be useful in the driving device 1.

It is worth mentioning, as long as the output voltage of the power supply device 82 can be interposed within the range of the measured voltage of the voltage detection unit 20, regardless of the value of the desired value of preset power set why the output voltage Jieke used as a voltage value sets the value of the predetermined power value, so that the drive device 1 is applicable to more kinds of different power ratings of LED chip 80, and may be more accurately calculate the driving step C voltage supplied to the drive unit 10 and the driving current of the LED chip 80.

And before performing step C after practice, block the drive means 1 and the power supply device electrically connected to the step 82 may also in step A. In other words, as long as it is connected to and After detecting the output voltage of the power supply device 82 in the LED chip 80 is electrically performed prior to the output Jieke seat 1b.

Through the present invention is applied to a driving method of light emitting diode chips of different voltage and current specifications of the same power that allows driving means adapted to drive any of the same rated power but different rated voltages and current rating of the LED chip, the rated voltage is not limited to a single and a light emitting diode chip rated current, can effectively improve the conventional driving apparatus for inconvenience only one size of the light emitting diode chip.

Above, only the preferred embodiment of the present invention, but the present invention does not form any limitation, embodiments of the present invention has been disclosed, although the preferred embodiment described above, however, not intended to limit the present invention, any skilled professional in the art, without departing from the scope of the technical solution of the present invention, when some minor modifications may be made using the techniques disclosed content of modification or equivalent change in equivalent embodiments, but all without departing from the technical solutions of the present invention, according to the present invention technical essence of any simple modification of the above embodiment made equivalent modifications and variations, provided they fall within the scope of the present invention.

Claims (13)

  1. A method of driving the light emitting diode chip applied to the same voltage and current specifications of different power, characterized in that it comprises the following steps:
    A. set a default power value;
    B. providing LED chip matches the predetermined power value;
    C. to obtain the desired operating current value matches the preset power value when the LED chip; and
    D. for the output drive current to the LED chip, and the driving current value of the current to the operating current value is maintained.
  2. The method of driving the light emitting diode chip applied to the same voltage and current specifications of the different power according to claim 1, characterized in that the driving current supplied to the output LED chip is provided by a drive means; the predetermined power value of the the predetermined power of the driving means drives the light emitting diode chip; step a, the preset power value is preset in the driving device.
  3. The method of driving the light emitting diode chip power applied to the same voltage and current specifications of the different as claimed in claim 2, characterized in that prior to the step A comprises a plurality of different power values ​​previously set in the drive apparatus, in step a, which is selected by the one of the plurality of power value for the preset power value.
  4. The method of driving the light emitting diode chip applied to the same voltage and current specifications of the different power according to claim 1, characterized in that the light emitting diode chip wherein step B is provided between the preset rated power of the power value of 90% to 110 %between.
  5. The method of driving the light emitting diode chip applied to the same voltage and current specifications of the different power according to claim 1, characterized in that wherein the step C, is output for the driving current to the LED chip and the driving current value of the current gradually increased from the current value is less than the start value of the operating current, while the detected voltage value supplied driving voltage to the light emitting diode chip, and calculates the product of the voltage value of the driving voltage and the current value of the driving current, until the product is equal to the preset value of power stops increasing the current value of the driving current when the operating current is equal to the product of the preset power value supplied to the output current value of the driving current when the light emitting diode chip.
  6. The method of driving the light emitting diode chip power of different voltage and current applied to the same specifications as claimed in claim 1, characterized in that further comprising the step E, after procedure D, the detection output supplied to the driving power of the light emitting diode chip exceeds the preset power value preset range, for changing the output current value of the driving current to the LED chip, so that the predetermined range for the input to the light emitting diode chip driving power between the preset power value wherein the driving power is the product of the voltage value of the driving voltage and the current value of the driving current and the driving voltage is a supply voltage loss of the LED chip.
  7. The method of driving the light emitting diode chip power applied to the same voltage and current specifications of the different as claimed in claim 6, characterized in that the predetermined range of between 97% to 103% for a preset power value.
  8. The method of driving the light emitting diode chip power of different voltage and current applied to the same specifications as claimed in claim 1, characterized in that it further comprises detecting when the voltage supplied to the output value of the driving voltage of the light emitting diode chip is greater than an upper limit voltage value, limit for the driving voltage to the light emitting diode chip, the voltage value of the driving voltage is maintained at the upper limit voltage value.
  9. When the light emitting diode chip driving method is applied to the same voltage and current specifications of the different power according to claim 1, characterized in that it further comprises a current detection value of the driving current supplied to the LED chip output is greater than the upper limit current value , the limit for a driving current output to the LED chip, the current value of the driving current is maintained at the upper limit current value.
  10. The method of driving the light emitting diode chip power applied to the same voltage and current specifications of the different as claimed in claim 2, characterized in that the drive means having an output port, the power supply connected to the LED chip; performed prior to step A, to provide power supply device and the power supply device having an output terminal, and an output from the output terminal voltage; then, connecting the output terminal of the power supply device to an output port of the drive means, and acquires the output voltage detecting the voltage value, thereby at step a, the value of the output voltage set voltage value for the preset power value; Further, after obtaining a voltage value detected of the output voltage, then the output of the power supply block apparatus terminal electrically connected between the output port of the drive means.
  11. The method of driving the light emitting diode chip power applied to the same specifications of the different voltage and current as claimed in claim 10, characterized in that prior to the step A further comprises comparing the voltage to a predetermined value in the driving means; in Step A when the detected voltage value is the voltage output is greater than or equal to the comparison voltage value, the voltage value of the output voltage value is set as the default power value.
  12. The method of driving the same LED chip different power voltage and current applied to the specifications according to claim 10, characterized in that the power supply output terminal of the blocking device electrically connected between the output port of the drive means, is before performing step A.
  13. The method of driving the same LED chip different power voltage and current applied to the specifications according to claim 10, characterized in that the power supply output terminal of the blocking device electrically connected between the output port of the drive means, is after in step A and prior to performing step C.
PCT/CN2014/000807 2013-03-28 2014-08-29 Drive method applied to light-emitting diode chip with same power but different voltage and current specifications WO2015051590A1 (en)

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CN 201310471025 CN104080243B (en) 2013-03-28 2013-10-10 The method of driving the light emitting diode chip

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JP2016522042A JP2016536784A (en) 2013-10-10 2014-08-29 The driving method of the light emitting diode chip voltage those with at power and current are applied to different specifications

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CN104080243A (en) * 2013-03-28 2014-10-01 东林科技股份有限公司 LED chip drive method

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Publication number Priority date Publication date Assignee Title
US20060082538A1 (en) * 2004-10-08 2006-04-20 Sony Corporation LED driving apparatus and method of controlling luminous power
CN101861007A (en) * 2009-04-09 2010-10-13 照明有限责任公司 Power control circuit and method
US8502476B2 (en) * 2009-10-16 2013-08-06 Samsung Electronics Co., Ltd Method and apparatus for controlling power consumption of light source in mobile projector
CN203206527U (en) * 2013-02-08 2013-09-18 东林科技股份有限公司 Stable-power power supply device
CN203206526U (en) * 2013-02-08 2013-09-18 东林科技股份有限公司 Light-emitting diode (LED) lighting device with certain power
CN103987147A (en) * 2013-02-08 2014-08-13 东林科技股份有限公司 Rated-power light-emitting-diode lighting device and rated-power output control method
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