TWM500422U - A driving circuit - Google Patents

Description

Drive circuit

The present invention relates to a driving circuit, and more particularly to a driving circuit for driving a light emitting diode.

In recent years, due to the rapid development of semiconductor manufacturing processes, light-emitting diodes (LEDs) with long life and low power consumption have been increasingly used by the public for illumination compared with conventional light sources. However, since the conventional indoor lighting equipment uses mostly AC power, the LEDs require a DC power source to convert electrical energy into light energy. Therefore, when using a light-emitting diode as a light source, an AC-to-DC converter is required.

Please refer to the first figure, which is a block diagram of the driving circuit of the conventional light-emitting diode, and converts the AC power source 10 into a DC power source by using an AC/DC converter 11 and supplies the DC power source to the light source. The diode 12 is used. The AC power source 10 is, for example, a common commercial AC power source of 100 volts/110 volts/220 volts, but can also be a higher voltage AC power source. However, this conventional driving circuit has a problem in that it supplies a DC power supply to the AC/DC converter 11 of the LED 12, which is extremely bulky. Therefore, in order to directly replace the original luminaire, an extra space is required to install the AC/DC converter 11.

In view of the foregoing, there is a need for a driver circuit for a light-emitting diode that reduces the volume required for its application to an AC power source. Under the long-term thinking and research of the applicant, the driving circuit of the light-emitting diode of the present invention is proposed, and it is not necessary to have an additional design as in the conventional design. Huge volume to accommodate the circuit. In addition, the driving circuit of the light-emitting diode of the present invention is realized by a simple manufacturing method by a simple structure, and a relatively light design is realized.

In view of the above-mentioned problems of the prior art, the purpose of the present invention is to provide a driving circuit for driving the light-emitting diodes, thereby reducing the volume required for the driving circuit and further reducing the cost of the driving circuit.

One of the ideas of the present invention is to provide a driving circuit for driving a light emitting diode, comprising: a transformer unit, receiving a first alternating current power source, performing a voltage transformation process on the first alternating current power source, and outputting a second alternating current power source a rectifying unit receives the second alternating current power source, rectifies the second alternating current power source, and outputs a direct current power source; a certain current unit receives the direct current power source and outputs a constant current; and a light emitting unit receives the constant current, and A light source is emitted; and a clamp type diode is coupled to the DC power supply at one end and coupled to the other end.

Based on the foregoing concept, the rectifier is a bridge rectifier.

Based on the foregoing concept, the rectifier is a full wave bridge rectifier.

Based on the foregoing concept, the rectifier is a diode bridge rectifier.

Based on the foregoing concept, the constant current unit includes at least a certain current diode.

Based on the foregoing concept, the constant current unit includes a plurality of constant current diodes.

Based on the foregoing concept, the plurality of constant current diodes are connected in parallel.

Based on the foregoing concept, the light emitting unit includes at least one light emitting diode.

Based on the foregoing concept, the light emitting unit includes a plurality of light emitting diodes.

Based on the foregoing concept, the plurality of light emitting diodes are connected in series.

One of the ideas of this creation is to propose a driving circuit for driving the light emitting diode The body comprises: a rectifying unit, receiving an alternating current power source, rectifying the alternating current power source, and outputting a direct current power source; a certain current unit receiving the direct current power source and outputting a certain current; and a light emitting unit receiving the constant current and emitting a light source; and a clamp type diode coupled to both ends of the alternating current power source.

The foregoing aspects and other aspects of the present invention will be apparent from the following detailed description of the accompanying drawings.

1‧‧‧Lighting diode drive circuit

2‧‧‧Drive circuit

10‧‧‧AC power supply

11‧‧‧AC/DC converter

12‧‧‧Lighting diode

20‧‧‧AC power supply

21‧‧‧Rectifier unit

22‧‧‧Constant current unit

23‧‧‧Lighting unit

30‧‧‧AC power supply

31‧‧‧Transformers

32‧‧‧Bridge diode rectifier

33‧‧‧Constant current diode

34‧‧‧Lighting diode

35‧‧‧Clamping diode

60‧‧‧AC power supply

61‧‧‧Clamping diode

62‧‧‧ diode

63‧‧‧ diode

64‧‧‧ diode

65‧‧‧ diode

66‧‧‧Multiple parallel current limiting diodes

67‧‧‧Multiple light-emitting diodes connected in series

68‧‧‧Multiple LEDs connected in series

The first figure is a block diagram of a conventional driving circuit of a light-emitting diode.

The second figure is a block diagram of a driving circuit for creating a light-emitting diode of a specific embodiment.

The third figure is a circuit diagram of a driving circuit for creating a light-emitting diode of a specific embodiment.

The fourth figure is a circuit diagram of a constant current unit of a specific embodiment.

The fifth figure is a circuit diagram of a light-emitting unit of a specific embodiment.

The sixth drawing is a circuit diagram of a driving circuit for creating a light-emitting diode of a specific embodiment.

The present invention will now be described more fully hereinafter with reference to the accompanying drawings in which FIG. However, the present invention can be embodied in many different forms and should not be construed as a limitation to the specific embodiments disclosed herein; rather, these embodiments are intended to provide a complete understanding of the disclosure and complete the scope of the novel. Communicate to those skilled in the art. The present invention can be embodied in a method or apparatus, among other features. Accordingly, the present invention may take the form of a specific embodiment of the entire hardware embodiment, the entire software embodiment, or a combination of soft and hard aspects. therefore, The following detailed description is not to be taken as limiting.

In addition, as used herein, the verb "or" is an inclusive "or" and is equivalent to "and/or" unless the content is clearly stated. Unless the content is clearly stated, the narrative "based on" is non-exclusive and allows for other factors based on undescribed. In addition, in the specification, the meaning of "a" and "the" includes the meaning of the plural meaning. The meaning of "middle" includes "middle" and "above".

Throughout the specification and the scope of the patent application, the following terms are used in the meaning of the explicit meaning unless the content clearly clarifies. The phrase "in a particular embodiment", as used herein, may refer to the same embodiment, but does not necessarily mean the same embodiment. In addition, the phrase "in another embodiment", as used herein, may refer to a different embodiment, but does not necessarily mean a different embodiment. Therefore, various embodiments of the present invention may be combined as described below without departing from the scope or spirit of the invention.

In order to solve the prior art, because of the use of an AC/DC converter, the overall circuit design is bulky and costly. First, please refer to the second figure, which is a block diagram of a driving circuit of a light-emitting diode according to a specific embodiment of the present invention. The driving circuit 2 of the present embodiment includes a rectifying unit 21, a constant current unit 22, and a light emitting unit 23.

The AC power source 20 can be input to the rectifying unit 21, and rectified by the rectifying unit 21 to become a DC power source. The rectifying unit 21 includes, but is not limited to, a bridge rectifier, a half-wave rectifier, a full-wave rectifier, and a diode rectifier. The rectifying unit 21 can output the rectified direct current to the constant current unit 22. The DC power source rectified by the rectifying unit 21 is generally unstable, but the constant current unit 22 can fixedly output a constant current even in a wide range of power supply voltages, for example, 1 to 100 volts or 2 to 200 volts. That is to say, even if the power supply voltage changes, it will not affect the output current. in In a specific embodiment, the constant current unit may include at least a Current Regulating Diode (CRD), but is not limited thereto, and the function of determining the current through other methods may be in the creative spirit of the present invention. Inside. In order to provide a higher and more stable current output for the constant current unit, in another embodiment, referring to the fourth figure, the constant current unit 22 may also be connected in parallel with a plurality of constant current diodes.

The light emitting unit 23 can receive the current output by the constant current unit 22, and convert the electric energy into light energy to become an illuminating light source. In a specific embodiment, the fixed current of the constant current diode can be used to fix the current, and the voltage instability or the surge can be reduced to cause the light-emitting diode 23 to burn or damage, so that the lifetime of the light-emitting diode can be used. Longer.

Next, please refer to the third figure, which is a circuit diagram of a driving circuit of a light-emitting diode according to a specific embodiment of the present invention. The driving circuit of the specific embodiment of the present invention includes a transformer 31, a bridge diode rectifier 32, a constant current diode 33, a light emitting diode 34, and a clamp type diode 35.

The AC power source 30 can input a first AC power source to the transformer 31. The transformer 31 transforms the voltage of the first alternating current power source and outputs a second alternating current power source to the bridge diode rectifier 32. After the second alternating current power source is rectified by the bridge diode rectifier 32, the output current of the direct current power source is output. Diode 33. In a specific embodiment, referring to the fifth figure, the constant current diode 33 can be formed by connecting a plurality of constant current diodes in parallel to provide a higher and more stable current output. The DC power source can be converted to a stable output current via the constant current diode 33, and a stable output current is supplied to the light emitting diode 34. In order to increase the brightness of the light source, please refer to the fifth figure. In another embodiment, a plurality of light emitting diodes may be formed in series.

Please continue to refer to the third figure. The specific embodiment of the present invention further implements a Transient Voltage Suppression Diode (TVS diode) 35. One end is coupled to the DC power output via the bridge diode rectifier 32, and the other end is coupled to the ground. The clamp type diode 35 includes, but is not limited to, a one-way clamp type diode and a two-way clamp type diode. Under the pulse of high energy generated by the circuit, for example, a high-energy pulse of several kilowatts, the clamped diode 35 absorbs the high-energy pulse generated instantaneously, clamps the voltage, makes the drive circuit less susceptible to damage, and increases the overall drive. The life of the circuit.

The clamped diode is not limited to being coupled to the output of the bridge diode rectifier. Please refer to the sixth figure, which is a circuit diagram of the driving circuit of the light-emitting diode of the specific embodiment. The driving circuit of the specific embodiment of the present invention comprises an AC power source 60, a clamp type diode 61, a diode 62-65, a plurality of parallel fixed current diodes 66, and a plurality of LEDs 67-connected in series. 68.

The AC power source 60 can be input to a bridge diode rectifier, wherein the bridge diode rectifier is formed by diodes 62-65. Different from the previous embodiment, the clamp type diode 61 can be directly coupled to the AC power source 60, and the drive circuit is not easily damaged under high energy pulses. After the AC power source 60 is rectified via the diodes 62-65, a DC power source is output to the plurality of parallel constant current diodes 66 to provide a stable constant current output. A constant current is input to the plurality of light emitting diodes 67 connected in series to form a light source. Different from the previous embodiment, the light source is formed by a plurality of light-emitting diodes 67 connected in series and a plurality of light-emitting diodes 68 connected in series. However, in the creative spirit of the present invention, a higher brightness light source can be provided by more sets of connected LEDs.

Different from the prior art, in a specific embodiment of the present invention, the driving circuit of the light emitting diode can be completed by using the transformer 31, the bridge diode rectifier 32, and the constant current diode 33. Effective volume and weight required for simple drive circuit. After reducing the design of the driving circuit, the LED lighting device combined with the driving circuit can easily replace the traditional photo Ming lamps. Therefore, in the case that the driving circuit does not occupy an extra large volume, the conventional luminaire such as a fluorescent tube or a tungsten lamp can be easily replaced by the illuminating diode lamp, thereby further reducing power consumption and reducing energy waste.

In summary, the driving circuit proposed by the present invention has a relatively simple structure and can be realized by a low-cost manufacturing method, and a relatively lightweight design is realized.

Heretofore, the specific embodiment of the driving circuit of the present invention has been described in detail by the above description and the drawings. All of the features disclosed in this specification are likely to be combined with other features, and each of the features disclosed in this specification may be selectively replaced with the same, equal or similar purpose features, and thus, in addition to the particularly salient features All of the features disclosed in this specification are only one example of equal or similar features. After the description of the preferred embodiment of the present invention, those skilled in the art should be able to understand that the creation is a novel, progressive and industrially practical creation, which has great development value. This creation has been modified by the people who are familiar with the craftsmanship, but it does not deviate from the scope of the application.

30‧‧‧AC power supply

31‧‧‧Transformers

32‧‧‧Bridge diode rectifier

33‧‧‧Constant current diode

34‧‧‧Lighting diode

35‧‧‧Clamping diode

Claims (10)

a driving circuit for driving a light emitting diode, comprising: a transformer unit, receiving a first alternating current power source, performing a voltage transformation process on the first alternating current power source, and outputting a second alternating current power source; and a rectifying unit receiving the a second AC power source, rectifying the second AC power source, outputting a DC power source; a certain current unit receiving the DC power source and outputting a constant current; an illumination unit receiving the constant current and emitting a light source; and a clamp The bit-type diode has one end coupled to the DC power source and the other end coupled to the ground. The driving circuit of claim 1, wherein the rectifying unit is a bridge rectifier. The driving circuit of claim 1, wherein the rectifying unit is a diode bridge rectifier. The driving circuit of claim 1, wherein the constant current unit comprises at least a certain current diode. The driving circuit of claim 1, wherein the constant current unit comprises a plurality of constant current diodes. The driving circuit of claim 5, wherein the plurality of constant current diodes are connected in parallel. The driving circuit of claim 1, wherein the light emitting unit comprises at least one light emitting diode. The driving circuit of claim 1, wherein the light emitting unit comprises Most of the light-emitting diodes. The driving circuit of claim 8, wherein the plurality of light emitting diodes are connected in series. A driving circuit for driving the LED, comprising: a rectifying unit, receiving an AC power source, rectifying the AC power source, outputting a DC power source; and receiving a DC current source to output a constant current; The light emitting unit receives the constant current and emits a light source; and a clamp type diode is coupled to both ends of the alternating current power source.