CN104883765A - Light source apparatus with light-emitting diode module - Google Patents
Light source apparatus with light-emitting diode module Download PDFInfo
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- CN104883765A CN104883765A CN201410068684.9A CN201410068684A CN104883765A CN 104883765 A CN104883765 A CN 104883765A CN 201410068684 A CN201410068684 A CN 201410068684A CN 104883765 A CN104883765 A CN 104883765A
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Abstract
The invention discloses a light source apparatus with a light-emitting diode module. The light source apparatus comprises a load module and the light-emitting diode module. The load module comprises a voltage stabilizing unit and a constant current control unit connected between the first output end and the second output end of the voltage stabilizing unit in a parallel way. The input end of the voltage stabilizing unit is connected with the positive end of a voltage source. The voltage stabilizing unit is used for generating a stable voltage difference between the first output end and the second output end. The voltage difference is less than 1.6 volts. The light-emitting diode module receives the voltage source residual voltage after the load module consumes the voltage difference. The residual voltage part greater than the working voltage required by the whole string of the light-emitting diodes does not exceed a safe voltage value. Therefore, when the voltage source changes, the voltage stabilizing unit of the load module still can generate a stable voltage difference and then output a stable current. The light-emitting diode module can thus emit light stably. The light-emitting diode module is further prevented from being damaged due to an overcurrent.
Description
Technical field
The present invention relates to a kind of light supply apparatus, particularly a kind of light supply apparatus of tool light-emitting diode (LED) module.
Background technology
Fig. 1 is the schematic diagram of existing LED light-source module 10.As shown in Figure 1, existing LED light-source module 10 comprises multiple luminescence unit 11, and each luminescence unit 11 is all parallel with one another with a direct voltage source 12.There is again in each luminescence unit 11 a resistance 11a and multiple light-emitting diode 11b, and light-emitting diode 11b and resistance 11a connects mutually, so make light-emitting diode 11b can receive direct voltage source 12 export direct voltage and conducting is luminous.
As shown in Figure 1, when the magnitude of voltage that direct voltage source 12 inputs is stablized, the resistance 11a connected with light-emitting diode 11b can be utilized to control the size of current of switched-on light emitting diodes 11b, and the effect of determining electric current and exporting can be reached, to make light-emitting diode 11b can stabilized illumination.
But, when the magnitude of voltage that direct voltage source 12 exports occurs to change a little, the electric current inputing to luminescence unit 11 will be affected occur significantly to change, and then produce unstable electric current, and affect the luminosity of light-emitting diode 11b in luminescence unit 11, and make light-emitting diode 11b may produce flickering situation, and the heat energy that can affect light-emitting diode 11b generation is unstable, and then the useful life of light-emitting diode 11b may be shortened.
Summary of the invention
One object of the present invention is that providing a kind of supplies the light supply apparatus that stabling current gives light-emitting diode.
Another object of the present invention is to the light supply apparatus of the tool light-emitting diode (LED) module that a kind of low cost is provided.
For reaching above-mentioned purpose and other objects, the light supply apparatus of tool light-emitting diode (LED) module provided by the invention, comprise: load blocks, it comprises voltage regulation unit and is parallel to the Given current controller unit between the first output of this voltage regulation unit and the second output, the input of this voltage regulation unit connects the anode of a voltage source, this voltage regulation unit is used for producing stable voltage difference between this first output and this second output, and this voltage difference is less than 1.6 volts, and light-emitting diode (LED) module, it is connected between this second output and negative terminal of this voltage source of this voltage regulation unit, the residual voltage after this voltage difference is consumed through this load blocks to receive this voltage source, this light-emitting diode (LED) module has at least one light-emitting diode string, this light-emitting diode string has the multiple light-emitting diodes be connected in series, the operating voltage needed for whole string of this light-emitting diode string is less than or equal to this residual voltage, wherein, the part that this residual voltage is greater than the operating voltage needed for whole string of this light-emitting diode string is no more than a safe voltage value, this Given current controller unit provides a resistance value, this resistance value configures this Given current controller unit according to the result of following formula, the operating current needed for this voltage difference/this light-emitting diode that this resistance value=this voltage regulation unit produces.
In one embodiment of the invention, this voltage regulation unit is low pressure difference linear voltage regulator.
In one embodiment of the invention, this Given current controller unit is resistance.
In one embodiment of the invention, this light-emitting diode (LED) module has multiple light-emitting diode string, parallel with one another between these light-emitting diode strings.
In one embodiment of the invention, this safe voltage value is 10 volts.
In one embodiment of the invention, this voltage difference is less than 1.1 volts.
Whereby, the present invention is by the voltage difference of the stable consumption of load blocks, allow Given current controller unit be controlled electric current export in a stationary value, make light-emitting diode (LED) module therefore can obtain stable confession induced current, and then avoid light-emitting diode (LED) module to damage because of overcurrent, and light-emitting diode (LED) module can not be changed because of the variation a little of voltage source output, in other words, by voltage regulation unit disclosed by the invention, the use of Given current controller unit and voltage difference, residual voltage value, the control of safe voltage value, the light-emitting diode (LED) module of light supply apparatus is except having stable electric current supply, this light supply apparatus also can adopt lower-cost voltage regulation unit, as low pressure difference linear voltage regulator (low dropout regulator, LDO) effect producing stabling current is reached.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing LED light-source module.
Fig. 2 is the schematic diagram with the light supply apparatus of light-emitting diode (LED) module in one embodiment of the invention.
Fig. 3 is the schematic diagram with the light supply apparatus of multiple light-emitting diode string in one embodiment of the invention.
Critical piece Reference numeral:
Embodiment
For fully understanding object of the present invention, feature and technique effect, hereby by following specific embodiment, and by reference to the accompanying drawings, the present invention being elaborated, being described as follows:
First refer to Fig. 2, it is the schematic diagram of the light supply apparatus in one embodiment of the invention.The light supply apparatus of tool light-emitting diode (LED) module of the present invention comprises: load blocks 100 and light-emitting diode (LED) module 200.This load blocks receives the output voltage from voltage source 300, and controls to provide stabling current to light-emitting diode (LED) module 200 to this voltage.
This load blocks 100 comprises voltage regulation unit 110 and Given current controller unit 120.This voltage regulation unit 110 has input 115, first output 111 and the second output 112.The input of this Given current controller unit 120 connects this first output 111, the output of this Given current controller unit 120 connects this second output 112, so, between this first output 111 making this Given current controller unit 120 be parallel to this voltage regulation unit 110 and this second output 112.This input 115 of this voltage regulation unit 110 is the anode 301 connecting this voltage source 300, to receive the output voltage of this voltage source 300.This Given current controller unit 120 for example can be a resistance (as shown in Figure 2).
This voltage regulation unit 110, for producing stable voltage difference between this first output 111 and this second output 112, is make this voltage difference must be less than 1.6 volts in an embodiment of the present invention, is preferably and is less than 1.1 volts.This voltage regulation unit 110 for example can adopt low pressure difference linear voltage regulator (low dropoutregulator, LDO).
This light-emitting diode (LED) module 200 has at least one light-emitting diode string 210(Fig. 2 with a string light-emitting diode string exemplarily), be connected in series multiple light-emitting diode 201 in each light-emitting diode string 210.This light-emitting diode (LED) module 200 is connected between this second output 112 and negative terminal 302 of this voltage source 300 of this voltage regulation unit 100, exports residual voltage remaining after consuming this voltage difference through this load blocks 100 with the voltage receiving this voltage source 300.Design of the present invention is to arrange generation by burning voltage to produce the stabling current being supplied to this light-emitting diode (LED) module 200 further by this load blocks 100.In other words, the generation of this stabling current is provided by this load blocks 100 as load consumption disclosed by the invention, also therefore, according to this light-emitting diode string 210 whole string needed for operating voltage namely configure this suitable residual voltage by the voltage difference of this load blocks 100, the operating voltage needed for whole string of such as this light-emitting diode string 210 is less than or equal to this residual voltage.
In addition, in embodiments of the invention, the part that this residual voltage is greater than the operating voltage needed for whole string of this light-emitting diode string 210 may not exceed a safe voltage value, and this safe voltage value is better to be set between 6 volts to 10 volts.Can provide a resistance value as this Given current controller unit 120, this resistance value configures this Given current controller unit 120 according to the result of following formula:
The operating current needed for this voltage difference/this light-emitting diode that this resistance value=this voltage regulation unit produces.
Accordingly, by the configuration of load blocks 100 of the present invention and light-emitting diode (LED) module 200, this voltage difference of operating voltage needed for the whole string of this light-emitting diode string 210 and this load blocks 100 can obtain this light supply apparatus easily and preferably configure combination.For example, when voltage source is for providing 24 volts, and when this light-emitting diode string 210 need to be connected in series operating voltage be 3.3 volts light-emitting diode totally 6 time, this load blocks 100 can be designed to stablize produce voltage difference be 1 volt, when being now 0.1 ampere based on the operating current of this light-emitting diode preset, this Given current controller unit 120 makes this load blocks 100 stablize output 0.1 ampere with regard to the resistance value of configurable generation 10 ohm, now this residual voltage (for 23 volts) is greater than the part of the operating voltage (19.8 volts) needed for whole string of this light-emitting diode string 210 is 3.2 volts, this safe voltage value (10 volts) can not be exceeded.
Then refer to Fig. 3, it is the schematic diagram with the light supply apparatus of multiple light-emitting diode string in one embodiment of the invention.Fig. 3 illustrates that this light-emitting diode (LED) module 200 has the enforcement aspect of multiple light-emitting diode string 210, configures between these light-emitting diode strings 210 in mode parallel with one another.
In sum, by the light supply apparatus of tool light-emitting diode (LED) module of the present invention, when voltage source change, the voltage regulation unit of load blocks still can produce stable voltage difference, and then the electric current of stable output, and then make light-emitting diode (LED) module stabilized illumination, and light-emitting diode (LED) module can be avoided to damage because of overcurrent.
The present invention discloses with preferred embodiment hereinbefore, but it will be understood by those skilled in the art that this embodiment only for describing the present invention, and should not be read as and limit the scope of the invention.It should be noted, every change with this embodiment equivalence and displacement, all should be considered as being covered by category of the present invention.Therefore, the content that protection scope of the present invention ought limit with claims is as the criterion.
Claims (9)
1. a light supply apparatus for tool light-emitting diode (LED) module, is characterized in that, comprises:
Load blocks, comprise voltage regulation unit and be parallel to the Given current controller unit between the first output of this voltage regulation unit and the second output, the input of this voltage regulation unit connects the anode of a voltage source, this voltage regulation unit is used for producing stable voltage difference between this first output and this second output, and this voltage difference is less than 1.6 volts; And
Light-emitting diode (LED) module, be connected between this second output and negative terminal of this voltage source of this voltage regulation unit, the residual voltage after this voltage difference is consumed through this load blocks to receive this voltage source, this light-emitting diode (LED) module has at least one light-emitting diode string, this light-emitting diode string has the multiple light-emitting diodes be connected in series, the operating voltage needed for whole string of this light-emitting diode string is less than or equal to this residual voltage
Wherein, the part that this residual voltage is greater than the operating voltage needed for whole string of this light-emitting diode string is no more than a safe voltage value, and this Given current controller unit provides a resistance value, and this resistance value configures this Given current controller unit according to the result of following formula,
The operating current needed for this voltage difference/this light-emitting diode that this resistance value=this voltage regulation unit produces.
2. light supply apparatus as claimed in claim 1, it is characterized in that, this safe voltage value is 10 volts.
3. light supply apparatus as claimed in claim 1, it is characterized in that, this voltage regulation unit is low pressure difference linear voltage regulator.
4. light supply apparatus as claimed in claim 3, it is characterized in that, this Given current controller unit is resistance.
5. light supply apparatus as claimed in claim 4, it is characterized in that, this safe voltage value is 10 volts.
6. light supply apparatus as claimed in claim 5, it is characterized in that, this voltage difference is less than 1.1 volts.
7. light supply apparatus as claimed in claim 3, it is characterized in that, this light-emitting diode (LED) module has multiple light-emitting diode string, parallel with one another between these light-emitting diode strings.
8. light supply apparatus as claimed in claim 7, it is characterized in that, this safe voltage value is 10 volts.
9. light supply apparatus as claimed in claim 8, it is characterized in that, this voltage difference is less than 1.1 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410068684.9A CN104883765A (en) | 2014-02-27 | 2014-02-27 | Light source apparatus with light-emitting diode module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410068684.9A CN104883765A (en) | 2014-02-27 | 2014-02-27 | Light source apparatus with light-emitting diode module |
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| CN104883765A true CN104883765A (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410068684.9A Pending CN104883765A (en) | 2014-02-27 | 2014-02-27 | Light source apparatus with light-emitting diode module |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080129225A1 (en) * | 2004-12-03 | 2008-06-05 | Isao Yamamoto | Power Supply Device, Light Emitting Device Using Such Power Supply Device, And Electronic Device |
| CN201351888Y (en) * | 2009-02-06 | 2009-11-25 | 睿腾光电科技股份有限公司 | A light-emitting diode light source module and constant current unit structure thereof |
| CN102149236A (en) * | 2010-02-10 | 2011-08-10 | 廷高企业有限公司 | Light emitting diode bulb capable of working in wide voltage interval |
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2014
- 2014-02-27 CN CN201410068684.9A patent/CN104883765A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080129225A1 (en) * | 2004-12-03 | 2008-06-05 | Isao Yamamoto | Power Supply Device, Light Emitting Device Using Such Power Supply Device, And Electronic Device |
| CN201351888Y (en) * | 2009-02-06 | 2009-11-25 | 睿腾光电科技股份有限公司 | A light-emitting diode light source module and constant current unit structure thereof |
| CN102149236A (en) * | 2010-02-10 | 2011-08-10 | 廷高企业有限公司 | Light emitting diode bulb capable of working in wide voltage interval |
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Application publication date: 20150902 |