CN101247043B - Light emitting diode circuit component - Google Patents
Light emitting diode circuit component Download PDFInfo
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- CN101247043B CN101247043B CN200710080274A CN200710080274A CN101247043B CN 101247043 B CN101247043 B CN 101247043B CN 200710080274 A CN200710080274 A CN 200710080274A CN 200710080274 A CN200710080274 A CN 200710080274A CN 101247043 B CN101247043 B CN 101247043B
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- emitting diode
- light
- negative pole
- diode
- zener diode
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- 239000013078 crystal Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 16
- 230000015556 catabolic process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910002601 GaN Inorganic materials 0.000 description 1
- 241001062009 Indigofera Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000002650 habitual effect Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The present invention discloses a light emitting diode circuit component which comprises a light emitting diode (LED) and a Zener diode, and the emission wavelength of the light emitting diode is between the 570nm yellow-green light to 660nm red light. The Zener diode is series-connected to the light emitting diode in order to increase the operating voltage of the light emitting diode and avoids the burnout by the instantaneous current.
Description
Technical field
The present invention relates to a kind of circuit of LED, particularly relate to a kind of light emitting diode circuit component of being burnt by immediate current of preventing.
Background technology
With reference to figure 1, be the protection loop of general light-emitting diode.
With reference to figure 2, be the working curve diagram of general Zener diode.
With reference to figure 1 and Fig. 2, generally, utilize a Zener diode (Zener Diode) to be parallel to this light-emitting diode (LED) usually in order to the mode of protection light-emitting diode (LED).Whereby, when the application circuit (not shown) of this light-emitting diode, produce revers voltage V
ROr backward current I
RThe time, or general circuit is when producing static (ESD), the conducting immediately of this Zener diode, and then reach the purpose of protection light-emitting diode.
Though this Zener diode can be protected this light-emitting diode,, as voltage Vf forward during greater than the breakdown voltage Vz of Zener diode, Zener diode collapses at once, electric current this Zener diode that has collapsed of only can flowing through; Though light-emitting diode is still intact, can't current lead-through be arranged again, therefore, this circuit is just as inefficacy.In addition, when voltage Vf forward greater than the knee-point voltage Vk of light-emitting diode, and during less than the breakdown voltage Vz of Zener diode, then light-emitting diode conducting, light-emitting diode is kept operate as normal.
Yet the breakdown voltage Vz of general Zener diode is more than the 5V (volt), for indigo plant, the green light LED of general work voltage at 3V to 4V, does not have what problem in principle.But, for operating voltage at 1.8V to 2.6V, emission wavelength is at the red light-emitting diode of green-yellow light to 660 nanometer (nm) of 570 nanometers (nm), as voltage Vf forward during greater than the breakdown voltage Vz of Zener diode, Zener diode collapses, though light-emitting diode is still intact, current lead-through can't be arranged again, this circuit is just as inefficacy.
In addition, though forward voltage Vf is less than the breakdown voltage Vz of Zener diode, but for the light-emitting diode of 1.8V to 2.6V, it produces electric current still can be up to more than the several times of this light-emitting diode rated current for operating voltage, and light-emitting diode still may burn moment.
With reference to figure 3, apply to the circuit diagram of common cathode circuit for general light-emitting diode.
A kind of light-emitting diode (LED) module 100 in the application of common cathode in parallel, includes a red light-emitting diode (R) 110, a green light LED (G) 120 and a blue light-emitting diode (B) 130.This light-emitting diode (LED) module 100 also can be used in common anode circuit, and is not shown in the figures.
This red light-emitting diode (R) 110 has anodal 111 and one negative pole 112.This red light-emitting diode (R) 110 its emission wavelengths in 590 nanometers (nm) between 640 nanometers (nm) ruddiness.
This green light LED (G) 120 has anodal 121 and one negative pole 122.This negative pole 122 is electrically connected on the negative pole 112 of this red light-emitting diode (R) 110.This green light LED (G) 120 its emission wavelengths in 500 nanometers (nm) between 550 nanometers (nm) green glow.
This blue light-emitting diode (B) 130 has anodal 131 and one negative pole 132.This negative pole 132 is electrically connected on the negative pole 112 of this red light-emitting diode (R) 110, and the negative pole 122 of this green light LED (G) 120.This green light LED (G) 120 its emission wavelengths in 400 nanometers (nm) between 480 nanometers (nm) green glow.
The negative pole 122 of the negative pole 112 of this red light-emitting diode (R) 110, this green light LED (G) 120 is interconnected to limit 140 altogether with the negative pole 132 of this blue light-emitting diode (B) 130, whereby, constitute the concurrent (common) of this light-emitting diode (LED) module 100.
On using, be that the copolar point 140 with light-emitting diode (LED) module 100 is connected on the loop to be driven (power supply of electronic product, not shown in the figures), can be driven, and then send light source.
So, in the application of R, G, B common cathode, must be on the circuit beyond this light-emitting diode (LED) module 100 (as driving the loop) increase load (as resistance etc.), with the red light-emitting diode (R) 110 that prevents that operating voltage (Vf) is lower, influenced by immediate current and burn.
In sum, in the application of common cathode (anode altogether), general light-emitting diode (LED) module 100 must be set up load in the use, just can make the light source uniformity of R, G, B three looks, is the habitual technology of industry.But, just can order about light-emitting diode (LED) module 100 normal these points of operation at need external circuits (setting up load), not only increase the inconvenience that product is made, and, if on making, very do not missed the load that will set up, this light-emitting diode (LED) module 100 is after energising, will damage at once, and then waste manufactured materials and raise the cost.
Summary of the invention
The object of the present invention is to provide a kind of light emitting diode circuit component, Zener diode (ZenerDiode) is serially connected with light-emitting diode (LED), can improve the operating voltage (Vf) of light-emitting diode, avoid being burnt by immediate current, be applied to other circuit simultaneously, can increase the convenience of use.
To achieve these goals, the invention provides a kind of light emitting diode circuit component, comprise a light-emitting diode (LED) and a Zener diode (Zener Diode).
This light-emitting diode, its emission wavelength is between 570 nanometers (nm) green-yellow light to 660 nanometers (nm) ruddiness.
This Zener diode is serially connected with this light-emitting diode, and wherein this light-emitting diode has an anodal and negative pole; This Zener diode has an anodal and negative pole; The positive pole of this Zener diode is connected in the negative pole of this light-emitting diode.
Effect of the present invention is, (Zener Diode) is serially connected with light-emitting diode (LED) with Zener diode, to improve the operating voltage (Vf) of light-emitting diode (LED), avoid light-emitting diode to be burnt by immediate current, can increase the ease of use of other circuit simultaneously.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is the protection loop of general light-emitting diode;
Fig. 2 is the working curve diagram of general Zener diode;
Fig. 3 applies to the circuit diagram of common cathode circuit for general light-emitting diode;
Fig. 4 is the circuit diagram of the light emitting diode circuit component of first embodiment of the invention;
Fig. 5 is the circuit diagram of the light emitting diode circuit component of second embodiment of the invention;
Fig. 6 is the circuit diagram of the light emitting diode circuit component of third embodiment of the invention;
Fig. 7 is the circuit diagram of the light emitting diode circuit component of fourth embodiment of the invention;
Fig. 8 is the circuit diagram of the light emitting diode circuit component of fifth embodiment of the invention;
Fig. 9 is the circuit diagram of the light emitting diode circuit component of sixth embodiment of the invention.
Wherein, Reference numeral:
100: light emitting diode circuit component 110: red/Yellow light emitting diode
111: anodal 112: negative pole
120: green light LED 121: positive pole
122: negative pole 130: blue light-emitting diode
131: anodal 132: negative pole
140: copolar point 200: light emitting diode circuit component
200 ': light emitting diode circuit component 210: red/Yellow light emitting diode
211: anodal 212: negative pole
220: Zener diode 221: positive pole
222: negative pole 230: green light LED
231: anodal 232: negative pole
240: blue light-emitting diode 241: positive pole
242: negative pole 300: light-emitting diode (LED) module
300 ': light-emitting diode (LED) module 310: red/Yellow light emitting diode
311: anodal 312: negative pole
Zener diode 321 in 320: the first: positive pole
322: 330: the second Zener diodes of negative pole
331: anodal 332: negative pole
340: Zener diode 350: Zener diode
Embodiment
With reference to figure 4, be the circuit diagram of the light emitting diode circuit component of first embodiment of the invention.
Light emitting diode circuit component 200 of the present invention comprises a red/Yellow light emitting diode (R/Y) 210, and a Zener diode (Zener Diode) 220.
This red/Yellow light emitting diode (R/Y) 210 has anodal 211 and one negative pole 212.These red/Yellow light emitting diode (R/Y) 210 its emission wavelengths are between 570 nanometers (nm) green-yellow light to 660 nanometers (nm) ruddiness.
This Zener diode (ZD) 220 has anodal 221 and one negative pole 222.The positive pole 221 of this Zener diode 220 is connected in the negative pole 212 of this red/Yellow light emitting diode (R/Y).
Light emitting diode circuit component 200 of the present invention is connected in series Zener diode (Zener Diode) 220 mutually with red/Yellow light emitting diode (R/Y) 210.The operating voltage (Vf) of a Zener diode 220 of cause is between the 0.7V to 1.2V.So, add the operating voltage (1.8v to 2.6V) of red/Yellow light emitting diode (R/Y) 230 to make the operating voltage (Vf) of this light emitting diode circuit component 200 to bring up between the 2.5V to 3.8V.Therefore, be used on other drive circuit, need not external again other protective circuit, just can avoid immediate current to burn.
With reference to figure 5, be the circuit diagram of the light emitting diode circuit component of second embodiment of the invention.
The light emitting diode circuit component 200 of this second embodiment comprises a red/Yellow light emitting diode (R/Y) 210, and most Zener diodes (Zener Diode) 220.Is example at this with three Zener diodes 220.
Among second embodiment, each Zener diode 220 is parallel with one another, again the positive pole 221 of each Zener diode 220 is connected in the negative pole 212 of this light-emitting diode 210.Whereby, reach the effect identical, repeat no more with first embodiment.
With reference to figure 6, be the circuit diagram of the light emitting diode circuit component of third embodiment of the invention.
The light emitting diode circuit component 200 ' of this 3rd embodiment comprises a red/Yellow light emitting diode (R/Y) 210, a Zener diode (Zener Diode) 220, one green light LED (G) 230, and a blue light-emitting diode (B) 240.
This red/Yellow light emitting diode (R/Y) 210 has anodal 211 and one negative pole 212.These red/Yellow light emitting diode (R/Y) 210 its emission wavelengths are between 570 nanometers (nm) green-yellow light to 660 nanometers (nm) ruddiness.
This Zener diode 220 has anodal 221 and one negative pole 222.The positive pole 221 of this Zener diode 220 is connected in the negative pole 212 of this red/Yellow light emitting diode (R/Y).
This green light LED (G) 230 has anodal 231 and one negative pole 232.The negative pole 232 of this green light LED (G) is connected in the negative pole 222 of this Zener diode 220.This green light LED (G) 230 its emission wavelengths in 500 nanometers (nm) between 550 nanometers (nm) green glow.
This blue light-emitting diode (B) 240 has anodal 241 and one negative pole 242.The negative pole 242 of this blue light-emitting diode (B) 240 is connected in the negative pole 222 of this Zener diode 220 and the negative pole 232 of this green light LED (G) 230.This blue light-emitting diode (B) 240 its emission wavelengths in 400 nanometers (nm) between 480 nanometers (nm) blue light.
Through above-mentioned explanation, because blue light-emitting diode (B) 240 is gallium nitride (GaN), indium gallium nitride (InGaN) material with green light LED (G) 230, operating voltage (Vf) all drops between the 3V to 4V.Therefore, the present invention is with the light emitting diode circuit component 200 of Fig. 4, when being applied in the circuit of R, G, B common cathode (or anode) altogether of Fig. 6, if supplied with red/yellow light-emitting diode (R/Y) 210, green light LED (G) 230 and blue light-emitting diode (B) simultaneously at 240 o'clock with the driving voltage of 3V to 4V, the brightness of this three LEDs is with unanimity, can not produce a certain luminance shortage (low-light level), and influence the service efficiency (light source is not enough or problem such as aberration is arranged) of this light emitting diode circuit component 200 '; Simultaneously, this red/Yellow light emitting diode (R/Y) 210 can not burnt by immediate current yet.
Conclude above-mentionedly, light emitting diode circuit component 200,200 ' of the present invention is applied to drive on the loop, just need not external again other protective circuit.The shortcoming that must set up external protection loop than known light-emitting diode (LED) module 100; The present invention is used in common cathode, altogether during circuit such as anode, has not only improved the convenience of using, and also can avoid light-emitting diode to be burnt by immediate current.Thus, can lower the Module Dissipation of light emitting diode circuit component itself and drive circuit.
With reference to figure 7, be the circuit diagram of the light emitting diode circuit component of fourth embodiment of the invention.
The light emitting diode circuit component 200 of this 4th embodiment " comprise 210, two Zener diodes of a red/Yellow light emitting diode (R/Y) (Zener Diode), 220, one green light LED (G) 230, and a blue light-emitting diode (B) 240.
This 4th embodiment, just the light emitting diode circuit component 200 ' with Fig. 5 applies on R, G, the B common cathode circuit, and it uses effect identical with the light emitting diode circuit component 200 ' of Fig. 6, repeats no more.Certainly, the combination of circuits of this Fig. 7 also can apply to R, G, B is total on the circuit of anode, no longer adds explanation.
With reference to figure 8, be the circuit diagram of the light emitting diode circuit component of fifth embodiment of the invention.
The light emitting diode circuit component 300 of this 5th embodiment comprises a red/Yellow light emitting diode (R/Y) 310, one first Zener diode (Zener Diode) 320, and one second Zener diode 330.
This red/Yellow light emitting diode (R/Y) 310 has anodal 311 and one negative pole 312.These red/Yellow light emitting diode (R/Y) 310 its emission wavelengths are between 570 nanometers (nm) green-yellow light to 660 nanometers (nm) ruddiness.
This first Zener diode 320 has anodal 321 and one negative pole 322.The positive pole 321 of this first Zener diode 320 is connected in the negative pole 312 of this red/Yellow light emitting diode (R/Y) 310.
This second Zener diode 330 has anodal 331 and one negative pole 332.The positive pole 331 of this second Zener diode 330 is connected in the negative pole 322 of this first Zener diode 320, and the negative pole 332 of this second Zener diode 330 is connected in the positive pole 311 of this red/Yellow light emitting diode (R/Y) 310.
This light emitting diode circuit component 300 except can by first Zener diode 320 reach prevent that immediate current from burning; When revers voltage because of abnormity of power supply or static factor, but and when being higher than the bearing value of this first Zener diode 320 and this light-emitting diode 310, at this moment, this second Zener diode 330 can conductings, to realize anlistatig effect.
With reference to figure 9, be the circuit diagram of the light emitting diode circuit component of sixth embodiment of the invention.
The light emitting diode circuit component 300 ' of this 6th embodiment comprises a red/Yellow light emitting diode (R/Y) 310, one first Zener diode (Zener Diode) 320, and two second Zener diodes 340,350 that oppositely are connected in series.
Two second Zener diodes 340,350 are connected the positive pole 311 of this light-emitting diode 310 and the negative pole 322 of this first Zener diode 320, so as to reaching the use effect identical with the 5th embodiment of Fig. 8, prevent that except that reaching immediate current from burning, also can obtain antistatic property.
In addition, light emitting diode circuit component 200 ', 300 ' of the present invention except that can be applicable to altogether cloudy (sun) circuit of RGB and R, G, altogether cloudy (sun) circuit of Y, B, also can be used in R, G, altogether cloudy (sun) circuit of G, B, and this seldom gives unnecessary details.
Through above-mentioned explanation; light emitting diode circuit component of the present invention; really can have the loop of a protection light-emitting diode of one's own; when being used in various circuit arrangement; not only need not again external protection loop; can prevent that immediate current from burning, and, also have the advantage of convenient this light emitting diode circuit component of utilization this circuit arrangement.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (7)
1. a light emitting diode circuit component is characterized in that, includes:
One first light-emitting diode, its emission wavelength is between 570 nanometer green-yellow light to 660 nano red lights; And
At least one first Zener diode is serially connected with this first light-emitting diode, and wherein this first light-emitting diode has an anodal and negative pole; This first Zener diode has an anodal and negative pole; The positive pole of this first Zener diode is connected in the negative pole of this first light-emitting diode.
2. light emitting diode circuit component according to claim 1 is characterized in that, also comprises one second Zener diode, and this second Zener diode has an anodal and negative pole; The positive pole of this second Zener diode is connected in the negative pole of this first Zener diode, and the negative pole of this second Zener diode is connected in the positive pole of this first light-emitting diode.
3. light emitting diode circuit component according to claim 1 is characterized in that, this first Zener diode has two at least, and each first Zener diode has an anodal and negative pole; Each first Zener diode is parallel with one another, and the positive pole of each first Zener diode is connected in the negative pole of this first light-emitting diode.
4. light emitting diode circuit component according to claim 1 is characterized in that, this first light-emitting diode is a LED crystal grain of launching ruddiness.
5. light emitting diode circuit component according to claim 1 is characterized in that, also comprises one second light-emitting diode and one the 3rd light-emitting diode; This second light-emitting diode and the 3rd light-emitting diode are parallel with one another, and be connected to this first Zener diode, this second light-emitting diode wherein, its emission wavelength is between 400 nanometer to 480 nano blue lights, and having an anodal and negative pole, the negative pole of this second light-emitting diode is connected in the negative pole of this first Zener diode; And
The 3rd light-emitting diode, its emission wavelength and have anodal and a negative pole between 500 nanometer to 550 nanometer green glows, the negative pole of the 3rd light-emitting diode is connected in the negative pole of this first Zener diode and the negative pole of this second light-emitting diode.
6. light emitting diode circuit component according to claim 5, it is characterized in that this first Zener diode has two at least, each first Zener diode is parallel with one another, and the positive pole of each first Zener diode is connected in the negative pole of this first light-emitting diode.
7. light emitting diode circuit component according to claim 1, it is characterized in that, also comprise two oppositely Zener diodes of serial connection, these two Zener diodes that oppositely are connected in series are connected the positive pole of this first light-emitting diode and the negative pole of this first Zener diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710080274A CN101247043B (en) | 2007-02-15 | 2007-02-15 | Light emitting diode circuit component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710080274A CN101247043B (en) | 2007-02-15 | 2007-02-15 | Light emitting diode circuit component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101247043A CN101247043A (en) | 2008-08-20 |
| CN101247043B true CN101247043B (en) | 2010-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710080274A Active CN101247043B (en) | 2007-02-15 | 2007-02-15 | Light emitting diode circuit component |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2509235A (en) * | 2012-12-20 | 2014-06-25 | Accuric Ltd | LED driver circuit |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8053995B2 (en) * | 2008-09-30 | 2011-11-08 | Chu-Cheng Chang | LED light string without additional resistors |
| CN107205296A (en) * | 2017-03-20 | 2017-09-26 | 佳兴电机股份有限公司 | Light-emittingdiode circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502137A (en) * | 2000-12-28 | 2004-06-02 | ������������ʽ���� | Light emitting device |
| CN1558451A (en) * | 2004-02-03 | 2004-12-29 | ���ڿƼ��ɷ�����˾ | Light emitting diode element capable of preventing electrostatic damage |
| CN1767189A (en) * | 2004-09-20 | 2006-05-03 | 帝希欧有限公司 | High brightness led with anti-static discharge impact protection funciton |
-
2007
- 2007-02-15 CN CN200710080274A patent/CN101247043B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502137A (en) * | 2000-12-28 | 2004-06-02 | ������������ʽ���� | Light emitting device |
| CN1558451A (en) * | 2004-02-03 | 2004-12-29 | ���ڿƼ��ɷ�����˾ | Light emitting diode element capable of preventing electrostatic damage |
| CN1767189A (en) * | 2004-09-20 | 2006-05-03 | 帝希欧有限公司 | High brightness led with anti-static discharge impact protection funciton |
Non-Patent Citations (1)
| Title |
|---|
| 同上. |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2509235A (en) * | 2012-12-20 | 2014-06-25 | Accuric Ltd | LED driver circuit |
| GB2509099A (en) * | 2012-12-20 | 2014-06-25 | Accuric Ltd | LED driver circuit |
| GB2509235B (en) * | 2012-12-20 | 2016-03-16 | Accuric Ltd | Driver circuit |
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| CN101247043A (en) | 2008-08-20 |
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