CN201204720Y - AC drive apparatus for LED - Google Patents
AC drive apparatus for LED Download PDFInfo
- Publication number
- CN201204720Y CN201204720Y CNU2008200052190U CN200820005219U CN201204720Y CN 201204720 Y CN201204720 Y CN 201204720Y CN U2008200052190 U CNU2008200052190 U CN U2008200052190U CN 200820005219 U CN200820005219 U CN 200820005219U CN 201204720 Y CN201204720 Y CN 201204720Y
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Abstract
A LED AC driving device comprises a first LED, a second LED, a third LED, a fourth LED and a current stabilizer. The second LED is electrically connected with the first LED; the third LED is electrically connected with the second LED; the fourth LED is electrically connected with the first LED and the third LED; the current stabilizer is electrically connected with the first LED, the second LED, the third LED and the fourth LED so as to stabilize current flowing through the LEDs.
Description
Technical field
The utility model relates to a kind of light-emitting diode assembly, and is particularly related to a kind of light-emitting diode AC driving device.
Background technology
Be different from fluorescent tube by electron-beam excitation fluorescence, the photoelectric effect that light-emitting diode (LED) utilizes junction rectifier to produce is come luminous.The optical wavelength that light-emitting diode produced is more stable, and brightness is also controlled by electric current easily.Add that light-emitting diode has cold light, volume is little and the electricity-saving characteristic, and the life-span be 10 times of fluorescent tube, therefore become the market mainstream gradually.
Traditional light-emitting diode assembly provides electric current by an AC power, and this electric current at first needs by the bridge rectifier rectification, and the light-emitting diode of just flowing through then makes light-emitting diode luminous in the equal energy of the positive negative cycle conducting of AC power.
Yet the size of current of the uncontrollable light-emitting diode of flowing through of traditional light-emitting diode assembly, so light-emitting diode is damaged by big or small unsettled electric current easily.In addition, because the brightness of light-emitting diode is relevant with the size of current of flowing through on it,, influence luminous mass if the size of current instability can make the brightness instability of light-emitting diode.
Therefore need a kind of new light-emitting diode AC driving device, can stable flow through the size of current of light-emitting diode.
Summary of the invention
A purpose of the present utility model is to provide a kind of light-emitting diode AC driving device exactly, can carry out rectification to AC power, and stable flow is through the size of current of light-emitting diode.
According to an embodiment of the present utility model, light-emitting diode AC driving device comprises one first light-emitting diode, one second light-emitting diode, one the 3rd light-emitting diode, one the 4th light-emitting diode and a constant-current stabilizer.Second light-emitting diode electrically connects first light-emitting diode, and the 3rd light-emitting diode electrically connects second light-emitting diode, and the 4th light-emitting diode electrically connects first light-emitting diode and the 3rd light-emitting diode.Constant-current stabilizer then electrically connects first light-emitting diode, second light-emitting diode, the 3rd light-emitting diode and the 4th light-emitting diode, with the electric current of stable flow through light-emitting diode.
Another purpose of the present utility model is to provide a kind of light-emitting diode AC driving device exactly, can carry out rectification to AC power, and stable flow is through the electric current of light-emitting diode serial.
According to another embodiment of the present utility model, light-emitting diode AC driving device comprises one first light-emitting diode serial, one second light-emitting diode serial, one the 3rd light-emitting diode serial, one the 4th light-emitting diode serial and a constant-current stabilizer.The second light-emitting diode serial electrically connects the first light-emitting diode serial, and the 3rd light-emitting diode serial electrically connects the second light-emitting diode serial, and the 4th light-emitting diode serial electrically connects the first light-emitting diode serial and the 3rd light-emitting diode serial.Constant-current stabilizer then electrically connects the first light-emitting diode serial, the second light-emitting diode serial, the 3rd light-emitting diode serial and the 4th light-emitting diode serial, with the electric current of stable flow through the light-emitting diode serial.
Effect of the present utility model is that light-emitting diode is rectification AC power and luminous simultaneously; In addition, constant-current stabilizer can stable flow through the electric current of light-emitting diode, avoid light-emitting diode to be destroyed.
Below in conjunction with the drawings and specific embodiments the utility model is described in detail, but not as to qualification of the present utility model.
Description of drawings
Fig. 1 is the light-emitting diode AC driving device circuit figure of the utility model one embodiment;
Fig. 2 A is the light-emitting diode of the positive half cycle conducting of the utility model one embodiment AC power;
Fig. 2 B is the light-emitting diode of the utility model one embodiment AC power negative half period conducting.
Wherein, Reference numeral
101: AC power 103: current source
105: the first light-emitting diode serial 105a: light-emitting diode
107: the second light-emitting diode serial 107a: light-emitting diode
109: the four light-emitting diode serial 109a: light-emitting diode
111: the three light-emitting diode serial 111a: light-emitting diode
113～119: rectifier diode
Embodiment
In following examples, the light-emitting diode of AC driving device has rectification and luminous function concurrently; In addition, constant-current stabilizer can stable flow through the electric current of light-emitting diode, avoid light-emitting diode to be destroyed.
Please refer to Fig. 1, it is the light-emitting diode AC driving device circuit figure of the utility model one embodiment.Light-emitting diode AC driving device comprises the first light-emitting diode serial 105, the second light-emitting diode serial 107, the 3rd light-emitting diode serial 111, the 4th light-emitting diode serial 109, and constant-current stabilizer, and for example current source 103.
The first light-emitting diode serial 105, the second light-emitting diode serial 107, the 3rd light-emitting diode serial 111 and the 4th light-emitting diode serial 109 are for electrically connecting into a bridge rectifier loop.103 of AC power 101 and current sources are electrically connected to light-emitting diode serial 105 107 109 111.
Each light-emitting diode serial (105,107,109,111) comprises several light-emitting diodes (105a, 107a, 109a, 111a) separately.In each light-emitting diode serial 105 107 109 111, the negative electrode of each light-emitting diode electrically connects the anode of another light-emitting diode, to form forward serial connection.For instance, in the first light-emitting diode serial 105, the anode of a light-emitting diode 105a and negative electrode can electrically connect the negative electrode of a light-emitting diode 105a and the anode of next light-emitting diode 105a respectively.The connected mode of all the other light- emitting diode 107a, 109a and 111a is also with similar in the connected mode of light-emitting diode 105a.
If light-emitting diode connects in this kind bridge type return mode, when AC power 101 provides positive half cycle power supply, the first light-emitting diode serial 105 and the 3rd light-emitting diode serial 111 can form forward bias voltage drop, make the light-emitting diode 105a of the first light-emitting diode serial 105, and the light-emitting diode 111a conducting of the 3rd light-emitting diode serial 111 and luminous.
On the other hand, when AC power 101 provides the negative half period power supply, can form forward bias voltage drop to the second light-emitting diode serial 107 and the 4th light-emitting diode serial 109, make the light-emitting diode 107a and the light-emitting diode 109a conducting and luminous of the second light-emitting diode serial 107 and the 4th light-emitting diode serial 109.In other words, light-emitting diode 105a, 111a and light-emitting diode 107a, 109a itself promptly have rectification and luminous function concurrently.
Except light-emitting diode serial 105 107 109 111, still can in the AC driving device, increase rectifier diode 113 115 117 119.The overtension that provides when AC power 101, when damaging light-emitting diode easily, then can set up rectifier diode 113 115 117 119 and reduce pressure drop on light-emitting diode serial 105 107 109 111, go forward side by side a step throttling through the size of current of light-emitting diode, damage to avoid light-emitting diode.
Please be simultaneously with reference to Fig. 2 A and Fig. 2 B, it is respectively the light-emitting diode of the utility model positive half cycle of one embodiment AC power and negative half period conducting.The first light-emitting diode serial 105, the 3rd light-emitting diode serial 111, with the second light-emitting diode serial 107, the 4th light-emitting diode serial 109 respectively at different period conductings.
In Fig. 2 A, AC power 101 provides the power supply of positive half cycle, make the light-emitting diode conducting of win light emitting diode string row 105 and the 3rd light-emitting diode serial 111, the flow through light-emitting diode of the first light-emitting diode serial 105 and the 3rd light-emitting diode serial 111 of electric current makes these led lightings.In Fig. 2 B, AC power 101 provides the power supply of negative half period, make the light-emitting diode conducting of the second light-emitting diode serial 107 and the 4th light-emitting diode serial 109, the flow through light-emitting diode of the second light-emitting diode serial 107 and the 4th light-emitting diode serial 109 of electric current makes these led lightings.In other words,, light-emitting diode conducting and luminous is arranged all, make the AC driving device have the effect of full-wave rectification no matter be positive half period or negative half-cycle.
According to the foregoing description, the light-emitting diode of AC driving device has full-wave rectification and luminous function concurrently; In addition, constant-current stabilizer can stable flow through the electric current of light-emitting diode, avoid light-emitting diode to be destroyed.
Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the utility model.
Claims (9)
1. a light-emitting diode AC driving device is characterized in that, comprises:
One first light-emitting diode;
One second light-emitting diode electrically connects this first light-emitting diode;
One the 3rd light-emitting diode electrically connects this second light-emitting diode;
One the 4th light-emitting diode electrically connects this first light-emitting diode and the 3rd light-emitting diode; And
One constant-current stabilizer electrically connects this first light-emitting diode, this second light-emitting diode, the 3rd light-emitting diode and the 4th light-emitting diode, with the electric current of stable flow through those light-emitting diodes.
2. light-emitting diode AC driving device according to claim 1, it is characterized in that, each light-emitting diode has an anode and a negative electrode, this anode of this first light-emitting diode and this negative electrode, electrically connect this negative electrode of the 4th light-emitting diode and this negative electrode of this second light-emitting diode respectively, this anode of the 3rd light-emitting diode and this negative electrode then electrically connect this anode of the 4th light-emitting diode and this anode of this second light-emitting diode respectively.
3. light-emitting diode AC driving device according to claim 1 is characterized in that, also comprises:
One first rectifier diode electrically connects this first light-emitting diode;
One second rectifier diode electrically connects this second light-emitting diode;
One the 3rd rectifier diode electrically connects this second rectifier diode and the 3rd light-emitting diode; And
One the 4th rectifier diode, electrically connect this first rectifier diode and the 4th light-emitting diode, those rectifier diodes are rectification one AC power, with in not providing forward bias voltage drop to give those light-emitting diodes simultaneously, make those light-emitting diodes respectively at different period conductings.
4. light-emitting diode AC driving device according to claim 3, it is characterized in that, this first light-emitting diode and the 3rd light-emitting diode are in the conducting of one first period, and this second light-emitting diode and the 4th light-emitting diode are in the conducting of one second period.
5. light-emitting diode AC driving device according to claim 1 is characterized in that this constant-current stabilizer is a current source.
6. a light-emitting diode AC driving device is characterized in that, comprises:
One first light-emitting diode serial;
One second light-emitting diode serial electrically connects this first light-emitting diode serial;
One the 3rd light-emitting diode serial electrically connects this second light-emitting diode serial;
One the 4th light-emitting diode serial electrically connects this first light-emitting diode serial and the 3rd light-emitting diode serial; And
One constant-current stabilizer electrically connects this first light-emitting diode serial, this second light-emitting diode serial, the 3rd light-emitting diode serial and the 4th light-emitting diode serial, with the electric current of stable flow through those light-emitting diode serials.
7. light-emitting diode AC driving device according to claim 6 is characterized in that, also comprises:
One first rectifier diode electrically connects this first light-emitting diode serial;
One second rectifier diode electrically connects this second light-emitting diode serial;
One the 3rd rectifier diode electrically connects this second rectifier diode and the 3rd light-emitting diode serial; And
One the 4th rectifier diode, electrically connect this first rectifier diode and the 4th light-emitting diode serial, those rectifies one AC power with in not providing forward bias voltage drop to give those light-emitting diode serials simultaneously, make those light-emitting diode serials respectively at different period conductings.
8. light-emitting diode AC driving device according to claim 7, it is characterized in that, this first light-emitting diode serial and those the 3rd light-emitting diode serials are in the conducting of one first period, and this second light-emitting diode serial and the 4th light-emitting diode serial are in the conducting of one second period.
9. light-emitting diode AC driving device according to claim 6 is characterized in that this constant-current stabilizer is a current source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200052190U CN201204720Y (en) | 2008-03-18 | 2008-03-18 | AC drive apparatus for LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200052190U CN201204720Y (en) | 2008-03-18 | 2008-03-18 | AC drive apparatus for LED |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201204720Y true CN201204720Y (en) | 2009-03-04 |
Family
ID=40427033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200052190U Expired - Fee Related CN201204720Y (en) | 2008-03-18 | 2008-03-18 | AC drive apparatus for LED |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201204720Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956961A (en) * | 2009-07-24 | 2011-01-26 | 陆敬仁 | Simplest method for eliminating flicker generated in process of directly driving common LED by alternating current |
-
2008
- 2008-03-18 CN CNU2008200052190U patent/CN201204720Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956961A (en) * | 2009-07-24 | 2011-01-26 | 陆敬仁 | Simplest method for eliminating flicker generated in process of directly driving common LED by alternating current |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090304 Termination date: 20150318 |
|
| EXPY | Termination of patent right or utility model |