CN211557561U

CN211557561U - Lighting device capable of supporting multiple input voltages

Info

Publication number: CN211557561U
Application number: CN202020173022.9U
Authority: CN
Inventors: 钟嘉珽; 刘培钧
Original assignee: Paragon Semiconductor Lighting Technology Co Ltd
Current assignee: Paragon Semiconductor Lighting Technology Co Ltd
Priority date: 2020-02-14
Filing date: 2020-02-14
Publication date: 2020-09-22
Anticipated expiration: 2030-02-14

Abstract

The utility model provides a can support multiple input voltage's lighting device, including a plurality of luminous drive circuit electric connection luminescence unit respectively, wherein each luminous drive circuit converts this alternating voltage to a working voltage that supplies the luminescence unit to use after receiving an alternating input voltage. And each light-emitting driving circuit comprises a surge protector and a rectifier. The surge protector is used for inputting alternating current input voltage, and the rectifier is electrically connected with the surge protector and rectifies the alternating current input voltage passing through the surge protector into working voltage used by the light-emitting unit. Wherein, the surge protector provides a threshold voltage for preventing surge, so that the AC input voltage received by the light-emitting driving circuit can be different. Therefore, the utility model discloses a lighting device can be applied to different input voltage and supply the use, and has the highly compressed protection effect of abrupt wave equally.

Description

Lighting device capable of supporting multiple input voltages

Technical Field

The present invention relates to an illumination device, and more particularly to an illumination device with an ac led.

Background

In the conventional lighting device, an alternating current light emitting diode (AC LED) is widely used in daily life, and a power conversion-free characteristic is provided, so that a related lighting apparatus using the AC LED as a main light emitting component is also gradually emphasized.

For this type of lighting device, a surge protector may be disposed on the circuit loop in order to effectively protect the related electronic components. However, the threshold voltage of the surge protector against high voltage surges must be selected according to the input ac voltage, which limits the voltage application occasions to which the lighting device can be applied, and thus the same lighting device cannot be widely applied to various different voltage application occasions.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a can support multiple input voltage's lighting device, can supply to use in multiple different AC input voltage.

An embodiment of the utility model provides a can support multiple input voltage's lighting device, including luminescence unit and a plurality of luminous drive circuit. The light-emitting unit is provided with a plurality of groups of light-emitting diode strings, and any one group of light-emitting diode strings comprises a plurality of alternating current light-emitting diodes. The plurality of light-emitting drive circuits are respectively electrically connected with the light-emitting units, and any one of the light-emitting drive circuits receives an alternating current input voltage and then converts the alternating current input voltage into a working voltage for the light-emitting units. And any one of the light-emitting driving circuits includes a surge protector and a rectifier. The surge protector is used for inputting the alternating current input voltage, and the rectifier is electrically connected with the surge protector and rectifies the alternating current input voltage passing through the surge protector into working voltage used by the light-emitting unit. Wherein, the surge protectors provide surge protection with a threshold voltage which is different from each other, so that the alternating current input voltages received by the light-emitting drive circuits are different from each other.

In an embodiment, the light emitting driving circuit further includes a protection circuit electrically connected between the rectifier and the light emitting unit.

In an embodiment, the protection circuit is one of an over-current protection circuit and an over-temperature protection circuit or a combination thereof.

In one embodiment, the surge protector is a voltage suppressor or a metal oxide varistor.

In an embodiment, the lighting system further includes a switch electrically connected to the light-emitting driving circuit modules, the switch receiving the ac input voltage and selectively outputting the ac input voltage to one of the light-emitting driving circuit modules.

In one embodiment, the switch is a slide switch or a dip switch.

In one embodiment, the ac input voltages received by the light emitting driving circuits are 120V, 277V, and 480V.

In one embodiment, the surge protectors are a surge protector with a threshold voltage of 270V, a surge protector with a threshold voltage of 510V, and a surge protector with a threshold voltage of 820V.

In one embodiment, the led strings include a first led string, a second led string, a third led string and a fourth led string; wherein a first end of the first LED lamp string is electrically connected with a plurality of first diodes which are mutually connected in parallel; wherein a second diode is connected in series between a second end of the first LED lamp string and a first end of the second LED lamp string; a third diode is electrically connected between the second end of the first LED lamp string and the second diode; a fourth diode is electrically connected between the first end of the second LED lamp string and the second diode; a fifth diode is connected between a second end of the second LED lamp string and a first end of the third LED lamp string in series; the second end of the second LED lamp string is electrically connected with the fifth diode through a plurality of sixth diodes which are mutually connected in parallel; the first end of the third LED lamp string is electrically connected with the fifth diode through a plurality of seventh diodes which are mutually connected in parallel; wherein an eighth diode is connected in series between a second end of the third LED lamp string and a first end of the fourth LED lamp string; a ninth diode is electrically connected between the second end of the third LED lamp string and the eighth diode; a fourth diode is electrically connected between the first end of the fourth light-emitting diode lamp string and the eighth diode; the second end of the fourth LED lamp string is electrically connected with a plurality of eleventh diodes which are mutually connected in parallel; the first LED string, the second LED string, the third LED string and the fourth LED string are respectively formed by connecting fifty alternating current LEDs in series.

In an embodiment, the led strings include a first led string, a second led string, a third led string, a fourth led string, a fifth led string, a sixth led string, a seventh led string, an eighth led string, a ninth led string, and a tenth led string; wherein a first diode is electrically connected between the first LED lamp string and the second LED lamp; wherein a second diode is electrically connected between the second LED lamp string and the third LED lamp string; wherein a third diode is connected between the third LED lamp string and the fourth LED lamp string in series; wherein a fourth diode is electrically connected between the third LED lamp string and the third diode; wherein a fifth diode is electrically connected between the fourth LED lamp string and the third diode; a sixth diode is connected between the fourth LED lamp string and the fifth LED lamp string in series; wherein a seventh diode is electrically connected between the fourth LED lamp string and the sixth diode; the fifth light-emitting diode lamp string is electrically connected with the sixth diode through the fourth diode; a ninth diode is connected between the fifth light-emitting diode lamp string and the sixth light-emitting diode lamp string in series; wherein a twelfth diode is electrically connected between the fifth LED lamp string and the ninth diode; wherein an eleventh diode is electrically connected between the sixth LED lamp string and the ninth diode; wherein a twelfth diode is connected in series between the sixth LED lamp string and the seventh LED lamp string; wherein a thirteenth diode is electrically connected between the sixth LED lamp string and the twelfth diode; wherein a fourteenth diode is electrically connected between the seventh light-emitting diode lamp string and the twelfth diode; wherein a fifteenth diode is connected between the seventh LED lamp string and the eighth LED lamp string in series; a sixteenth diode is electrically connected between the seventh light-emitting diode lamp string and the fifteenth diode; wherein a seventeenth diode is electrically connected between the eighth LED lamp string and the fifteenth diode; the eighth light-emitting diode lamp string is electrically connected with the ninth light-emitting diode lamp; a nineteenth diode is electrically connected between the ninth light-emitting diode lamp string and the tenth light-emitting diode lamp string; the first light-emitting diode lamp string and the tenth light-emitting diode lamp string are formed by connecting 2 light-emitting diodes in series, the second light-emitting diode lamp string and the ninth light-emitting diode lamp string are formed by connecting 7 light-emitting diodes in series, the third light-emitting diode lamp string and the eighth light-emitting diode lamp string are formed by connecting 33 light-emitting diodes in series, the fourth light-emitting diode lamp string and the seventh light-emitting diode lamp string are formed by connecting 42 light-emitting diodes in series, and the fifth light-emitting diode lamp string and the sixth light-emitting diode lamp string are formed by connecting 21 light-emitting diodes in series.

To sum up, the embodiment of the utility model provides a can support multiple input voltage's lighting device is through letting different alternating current input voltage input to corresponding luminous drive circuit to make each luminous drive circuit can provide corresponding anti surge high voltage protection to the alternating current input voltage of difference, by this the utility model discloses can be so that single lighting device can be by wide application in different input voltage occasions, can effectively promote lighting device's the rate of utilization.

For a further understanding of the nature and technical content of the present invention, reference should be made to the following detailed description and accompanying drawings, which are provided for reference and illustration purposes only and are not intended to limit the invention.

Drawings

Fig. 1 is a functional block diagram of an illumination device capable of supporting multiple input voltages according to an embodiment of the present invention.

Fig. 2 is a schematic circuit diagram of a light emitting unit according to an embodiment of the present invention.

Fig. 3 to 5 are circuit conducting schematic diagrams of the light emitting unit in fig. 2.

Fig. 6 is a schematic circuit diagram of a light emitting unit according to an embodiment of the present invention.

Fig. 7 to 9 are circuit conducting schematic diagrams of the light emitting unit in fig. 6.

Fig. 10 is a functional block diagram of an illumination device capable of supporting multiple input voltages according to an embodiment of the present invention.

Detailed Description

The following embodiments of the present invention are described with reference to specific examples, and those skilled in the art can understand the advantages and effects of the present invention from the contents provided in the present specification. The present invention may be practiced or carried out in other different embodiments, and various modifications and changes may be made in the details of this description based on the different points of view and applications without departing from the spirit of the present invention. The drawings of the present invention are merely schematic illustrations, and are not drawn to scale, but are described in advance. The following embodiments will further explain the related art of the present invention in detail, but the contents are not provided to limit the scope of the present invention.

It will be understood that, although the terms "first," "second," "third," etc. may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are used primarily to distinguish one element from another element or from one signal to another signal. In addition, the term "or" as used herein should be taken to include any one or combination of more of the associated listed items as the case may be.

An embodiment of the present invention provides a lighting device capable of supporting multiple input voltages, where the lighting device is described for an alternating current Light Emitting Diode (LED) as a light emitting component. The circuit loop is provided with a single loop corresponding to different AC input voltages for use when the lighting device can be used for different AC voltage inputs to adapt to different application occasions, and each single loop can provide anti-surge and circuit operation related circuit protection. Furthermore, the same light-emitting component can be shared among different loops, thereby reducing the quantity and volume of the components.

System architecture embodiment of lighting device capable of supporting multiple input voltages

Referring to fig. 1, fig. 1 is a functional block diagram of an illumination device capable of supporting multiple input voltages according to an embodiment of the present invention. The lighting device 1 capable of supporting various input voltages in this embodiment includes, but is not limited to, a plurality of light-emitting driving circuits 11 and light-emitting units 13. The light-emitting driving circuits 11 are electrically connected to the light-emitting units 13, respectively. The plurality of light-emitting driving circuits 11 may be respectively input with different AC input voltages, for example, a circuit architecture in which 3 sets of light-emitting driving circuits 11 are illustrated and can respectively receive AC120V, AC277V, and AC480V is used herein, but the present invention is not limited thereto. The light-emitting unit 13 has a plurality of led strings, and any led string includes a plurality of ac leds, and each led string can be connected in series or in parallel according to the actual circuit design, which is not limited by the present invention.

Further, each light-emitting driving circuit 11 includes, for example, a surge protector 111, a rectifier 113, and a protection circuit 115. The surge protector 111 is electrically connected to an input end of the ac input voltage, which may be a wire terminal or a connector, but the present invention is not limited thereto. The rectifier 113 is electrically connected between the surge protector 111 and the protection circuit 115, and the rectifier 113 rectifies the ac input voltage passing through the surge protector 111 to obtain a working voltage for the light emitting unit 13. This operating voltage is for example pulsating direct current. The rectifier 113 may be, for example, a bridge rectifier, a half-wave rectifier.

The protection circuit 115 is electrically connected between the rectifier 113 and the light emitting unit 13, and the protection circuit 115 can provide related circuit protection for the ac light emitting diode in the light emitting unit 13. In an embodiment, the protection circuit 115 may be any combination of an over-current protection circuit and an over-temperature protection circuit, which is not limited herein. The specific operation of the protection circuit 115 is well known to those skilled in the art, and therefore, will not be described in detail herein.

In addition, in an embodiment, the light-emitting driving circuit 11 may include only the surge protector 111 and the rectifier 113, and the protection circuit 115 is omitted, so that the overall circuit cost and volume can be reduced, although the light-emitting unit 13 in this embodiment lacks the circuit protection provided by the protection circuit 115, the light-emitting unit 13 can still normally obtain the operating voltage from the output terminal of the rectifier 113 to normally illuminate.

Furthermore, the high voltage protection ranges provided by the surge protectors 111 in the light-emitting driving circuits 11 for preventing the surge are different from each other. For example, surge protector 111 receiving AC120V may provide surge protection for a threshold voltage of 270V. The surge protector 111 receiving AC277V may provide surge protection for a threshold voltage of 510V. The surge protector 111 receiving AC480V may provide surge protection for a threshold voltage of 820V. In addition, the surge protector 111 may be a voltage suppressor or a Metal Oxide Varistor (MOV), but the present invention is not limited thereto. The threshold voltage may be, for example, a breakdown voltage in a metal oxide varistor.

Therefore, it can be seen from the above description that, since the surge protectors 111 in the light-emitting driving circuits 11 can respectively provide different threshold voltage protections, the light-emitting driving circuits 11 can respectively receive different ac input voltages. That is, the user can select one of the light-emitting driving circuits 11 corresponding to the ac input voltage according to the ac input voltage provided at the installation position of the lighting device 1.

Referring to fig. 2, fig. 2 is a schematic circuit diagram of a light emitting unit according to an embodiment of the present invention. The light-emitting unit 13 includes a plurality of led strings and a plurality of diodes, for example, so that when AC input voltages of different AC120V, AC277V and AC480V are input, a plurality of different power supply circuits can be provided, and at the same time, all the led strings can be turned on and lit.

As shown in fig. 2, the led strings include, for example, a first led string L1, a second led string L2, a third led string L3 and a fourth led string L4, and for how the led strings are connected through diodes, please refer to the following description.

A first end of the first led string L1 is electrically connected to a plurality of first diodes D1 connected in parallel, as shown in the figure, the first diode D1 is illustrated by 3, and a first end of the first diode D1 is electrically connected to the positive power terminals of AC120V, AC277V, and AC480V, respectively.

A second diode D2 is connected in series between a second end of the first led string L1 and a first end of the second led string L2.

The second end of the first led string L1 and the first end of the second diode D2 are electrically connected to a first end of a third diode D3, and the second end of the third diode D3 is electrically connected to the negative power terminal of the AC 120V.

The first end of the second led string L2 and the second diode D2 are electrically connected to the second end of a fourth diode D4, and the first end of the fourth diode D4 is electrically connected to the positive power supply terminal of the AC 120V.

A fifth diode D5 is connected in series between a second end of the second led string L2 and a first end of the third led string L3.

The second end of the second led string L2 and the first end of the fifth diode D5 are electrically connected to the first ends of 2 sixth diodes D6 connected in parallel, and the second end of the sixth diode D6 is electrically connected to the negative power terminals of the AC120V and the AC277V, respectively.

The first end of the third led string L3 and the fifth diode D5 are electrically connected to the second ends of the 2 seventh diodes D7 connected in parallel, and the first end of the seventh diode D7 is electrically connected to the positive power terminals of the AC120V and the AC277V, respectively.

An eighth diode D8 is connected in series between the second end of the third led string L3 and a first end of the fourth led string L4.

The second end of the third led string L3 and the first end of the eighth diode are electrically connected to the first end of a ninth diode D9, and the second end of the ninth diode D9 is electrically connected to the negative power terminal of the AC 120V.

The first end of the fourth led string L4 and the second end of the eighth diode D8 are electrically connected to the second end of a diode D10, and the first end of the diode D10 is electrically connected to the positive power supply terminal of the AC 120V.

The second end of the fourth led string L4 is electrically connected to the first ends of a plurality of eleventh diodes D11 connected in parallel, as shown in the figure, the number of the eleventh diodes D11 is 3 for illustration, and the second end of the eleventh diode D11 is electrically connected to the negative power terminals of the AC120V, the AC277V and the AC480V, respectively.

The first led string L1, the second led string L2, the third led string L3 and the fourth led string L4 are exemplified by connecting fifty ac leds in series, but the present invention is not limited thereto.

Referring to fig. 3 to 5, fig. 3 to 5 are circuit conducting schematic diagrams of the light emitting unit in fig. 2.

As shown in fig. 3, when the light emitting unit 13 receives a single AC input voltage of AC120V, the conduction loop in which the current flows has four sets as described below.

In the first set of conduction loops, the current can flow from the positive power supply terminal of AC120V to the negative power supply terminal of AC120V through the first diode D1, the first led string L1, and the third diode D3 in sequence.

In the second conduction loop, the current can flow from the positive power supply terminal of AC120V to the negative power supply terminal of AC120V through the fourth diode D4, the second led string L2, and the sixth diode D6 in sequence.

In the third conduction loop, the current can flow from the positive power supply terminal of AC120V to the negative power supply terminal of AC120V after flowing through the seventh diode D7, the third led string L3, and the ninth diode D9 in sequence.

In the fourth conducting loop, the current can flow from the positive power supply terminal of AC120V to the negative power supply terminal of AC120V through the diode D10, the fourth led string L4, the eleventh diode D11, and so on.

As shown in fig. 4, when the light emitting unit 13 receives a single AC input voltage of AC277V, the conduction loop in which the current flows has 2 sets as described below.

In the first conductive loop, the current can flow from the positive power supply terminal of AC277V to the negative power supply terminal of AC277V through the first diode D1, the first led string L1, the second diode D2, the second led string L2, and the sixth diode D6 in sequence.

In the second conduction loop, the current can flow from the positive power supply terminal of the AC277V to the negative power supply terminal of the AC277V after flowing through the seventh diode D7, the third led string L3, the eighth diode D8, the fourth led string L4, and the eleventh diode D11 in sequence.

As shown in fig. 5, when the light emitting unit 13 receives a single AC input voltage of AC480V, the conduction loops in which the current flows have 1 set of conduction loops. The conducting loop is formed by that current can flow from the positive power supply end of AC480V to the negative power supply end of AC480V after sequentially flowing through the components such as the first diode D1, the first LED lamp string L1, the second diode D2, the second LED lamp string L2, the fifth diode D5, the third LED lamp string L3, the eighth diode D8, the fourth LED lamp string L4 and the eleventh diode D11.

Referring to fig. 6, fig. 6 is a circuit diagram of a light emitting unit according to an embodiment of the present invention. The light emitting unit 13 includes a plurality of led strings and a plurality of diodes, for example, so that when AC input voltages of different AC120V, AC277V, and AC480V are input, a plurality of different power supply circuits can be provided, and the led strings can be turned on and lit up completely or partially.

As shown in fig. 6, the led strings include, for example, a first led string L21, a second led string L22, a third led string L23, a fourth led string L24, a fifth led string L25, a sixth led string L26, a seventh led string L27, an eighth led string L28, a ninth led string L29 and a tenth led string L30, and the following description is provided for how the led strings are connected through diodes.

The second end of a first diode D1 is electrically connected between the first LED string L21 and the second LED string L22, the first end of the first LED string L21 is electrically connected to the positive power supply end of AC120V, and the first end of the first diode D1 is electrically connected to the positive power supply end of AC 277V.

The second led string L22 and the third led string L23 are electrically connected to a second end of a second diode D2, and a first end of the second diode D2 is electrically connected to a positive power supply terminal of AC 480V.

A third diode D3 is connected in series between the third led string L23 and the fourth led string L24.

The second end of the third led string L2 and the first end of the third diode D3 are electrically connected to a first end of a fourth diode D4, and the second end of the fourth diode D4 is electrically connected to the negative terminal of the AC120V power supply.

The first end of the fourth led string L24 and the second end of the third diode D3 are electrically connected to the second end of a fifth diode D5, and the first end of the fifth diode D5 is electrically connected to the positive power supply terminal of AC 120V.

A sixth diode D6 is connected in series between the fourth led string L24 and the fifth led string L25.

The second end of the fourth led string L24 and the first end of the sixth diode D6 are electrically connected to the first end of a seventh diode D7, and the second end of the seventh diode D7 is electrically connected to the negative terminal of the AC120V power supply.

The first end of the fifth led string L25 and the second end of the sixth diode D6 are electrically connected to the second end of an eighth diode D8, and the first end of the eighth diode D8 is electrically connected to the positive power supply terminal of AC 120V.

A ninth diode D9 is connected in series between the fifth led string L25 and the sixth led string L26.

The second end of the fifth led string L25 and the first end of the ninth diode D9 are electrically connected to the first end of a twelfth diode D10, and the second end of the twelfth diode D10 is electrically connected to the negative terminal of the AC277V power supply.

The first end of the sixth led string L26 and the second end of the ninth diode D9 are electrically connected to the second end of an eleventh diode D11, and the first end of the eleventh diode D11 is electrically connected to the positive power supply terminal of AC 277V.

A twelfth diode L12 is connected in series between the sixth led string L26 and the seventh led string L27.

The second end of the sixth led string L26 and the first end of the twelfth diode D12 are electrically connected to the first end of a thirteenth diode D13, and the second end of the thirteenth diode D13 is electrically connected to the negative terminal of the AC120V power supply.

The first end of the seventh led string L27 and the second end of the twelfth diode D12 are electrically connected to the second end of a fourteenth diode D14, and the first end of the fourteenth diode D14 is electrically connected to the positive power supply terminal of AC 120V.

A fifteenth diode D15 is connected in series between the seventh led string L27 and the eighth led string L28.

The second end of the seventh led string L27 and the first end of the fifteenth diode D15 are electrically connected to the first end of a sixteenth diode D16, and the second end of the sixteenth diode D16 is electrically connected to the negative power terminal of the AC 120C.

The first end of the eighth led string L28 and the second end of the fifteenth diode D15 are electrically connected to the second end of a seventeenth diode D17, and the first end of the seventeenth diode D17 is electrically connected to the positive power supply terminal of AC 120V.

The eighth led string L28 and the ninth led string L29 are electrically connected to a first end of an eighteenth diode D18, and a second end of the eighteenth diode D18 is electrically connected to a negative power terminal of AC 480V.

The ninth led string L29 and the tenth led string L30 are electrically connected to a first end of a nineteenth diode D19, and a second end of the nineteenth diode D19 is electrically connected to a negative power terminal of AC 277V.

The first led string L21 and the tenth led string L30 are formed by connecting 2 leds in series, the second led string L22 and the ninth led string L29 are formed by connecting 7 leds in series, the third led string L23 and the eighth led string L28 are formed by connecting 33 leds in series, the fourth led string L24 and the seventh led string L27 are formed by connecting 42 leds in series, and the fifth led string L25 and the sixth led string L26 are formed by connecting 21 leds in series. The connection of the led strings shown in fig. 6 is only for illustration and not for limiting the invention.

Referring to fig. 7 to 9, fig. 7 to 9 are circuit conducting schematic diagrams of the light emitting unit in fig. 6.

As shown in fig. 7, when the light emitting unit 13 receives a single AC input voltage of AC120V, the conduction loop in which the current flows has five sets as described below.

In the first set of conducting loops, the current may flow from the positive power supply terminal of AC120V to the negative power supply terminal of AC120V after flowing through the first led string L21, the second led string L22, the third led string L23, the fourth diode D4, and so on in sequence.

In the second conduction loop, the current can flow from the positive power supply terminal of AC120V to the negative power supply terminal of AC120V through the fifth diode D5, the fourth led string L24, and the seventh diode D7 in sequence.

In the third conducting loop, the current can flow from the positive power supply terminal of AC120V to the negative power supply terminal of AC120V after flowing through the eighth diode D8, the fifth led string L25, the ninth diode D9, and the thirteenth diode D13 in sequence.

In the fourth conduction loop, the current may flow from the positive power supply terminal of AC120V to the negative power supply terminal of AC120V after flowing through the fourteenth diode D14, the seventh led string L27, the sixteenth diode D16, and so on.

In the fifth conduction loop, the current may flow from the positive power supply terminal of AC120V to the negative power supply terminal of AC120V through the seventeenth led D17, the eighth led string L28, the ninth led string L29 and the tenth led string L30 in sequence.

As shown in fig. 8, when the light emitting unit receives a single AC input voltage of AC277V, the conduction loop in which the current flows has 2 sets as described below.

In the first conductive loop, the current may flow from the positive power supply terminal of AC277V to the negative power supply terminal of AC277V through the first diode D1, the second led string L22, the third led string L23, the third diode D3, the fourth led string L24, the sixth diode D6, the fifth led string L25, and the twelfth diode D10 in sequence.

In the second conduction loop, the current may flow from the positive power supply terminal of AC277V to the negative power supply terminal of AC277V after flowing through the components of eleventh diode D11, sixth led string L26, twelfth diode D12, seventh led string L27, fifteenth diode D15, eighth led string L28, ninth led string L29, and nineteenth diode D19 in sequence.

As shown in fig. 9, after the light emitting unit receives a single AC input voltage of AC480V, the conductive loop in which current flows has 1 set of conductive loops. The conducting loop is formed by that current can flow from a positive power supply terminal of the AC480V to a negative power supply terminal of the AC480V through the components of the second diode D2, the third LED lamp string L23, the third diode D3, the fourth LED lamp string L24, the sixth diode D6, the fifth LED lamp string L25, the ninth diode D9, the sixth LED lamp string L26, the twelfth diode D12, the seventh LED lamp string L27, the fifteenth diode D15, the eighth LED lamp string L28 and the eighteenth diode D18 in sequence.

Referring to fig. 10, fig. 10 is a functional block diagram of a lighting device according to an embodiment of the present invention. The lighting device 3 shown in fig. 10 is provided with an additional switch 10, as compared to the lighting device 1 shown in fig. 1, and the related descriptions of the remaining components with the same reference numerals have been described above, and are not repeated herein. The switch switcher 10 is electrically connected to the surge protectors 111 in the light-emitting driving circuits 11. The switching switch 10 is mainly used for receiving an input of an ac input voltage and selectively outputting the ac input voltage to one of the light-emitting driving circuits 11. Further, the switch device 10 can be a slide switch or a dip switch. For example, fig. 10 shows an example of a slide switch with two-pole three-cut (2P3T), but the present invention is not limited thereto.

Therefore, for the lighting device 3 shown in fig. 10, the user can selectively input one of 3 different AC input voltages, such as AC120V, AC277V, AC480V, etc., to the switcher 10 at the input end of the switcher 10 according to the requirement, and manually operate the switcher 10 to output the AC input voltage to the corresponding surge protector 111. For example, after the switcher 10 receives an AC input voltage of AC120V, the user must switch the output of the switcher 10 to the surge protector 111 that provides a threshold voltage of 270V. After the switcher 10 receives the AC input voltage of AC277V, the user must switch the output of the switcher 10 to the surge protector 111 that provides the threshold voltage of 510V. After the switcher receives the AC input voltage AC480V, the user must switch the output of the switcher 10 to the surge protector 111 that provides a threshold voltage of 820V. Therefore, the switching selection of the switch switcher 10 can facilitate the selection of the lighting driving circuit 11 suitable for the current ac input voltage.

[ advantageous effects of the embodiments ]

The utility model provides a can support multiple input voltage's lighting device sees through the independent luminous drive circuit of multiunit in order to receive different AC input voltage respectively to through set up the corresponding sudden wave protector that accords with AC input voltage in the luminous drive circuit separately, can make same lighting device can be applied to different AC input voltage for the use, and luminous unit can supply each luminous drive circuit sharing, in order to save subassembly quantity and reach the volume and reduce the effect. And the light-emitting unit in the lighting device module can smoothly and normally emit light and simultaneously has the circuit protection effect of surge. Therefore the utility model discloses a lighting device can be applied to different alternating current input voltage's occasion by extensive elasticity, effectively promotes the product availability factor.

The above-mentioned contents are only preferred and feasible embodiments of the present invention, and are not limited to the application range of the present invention, so that all the equivalent technical changes made by the contents of the specification and the drawings are included in the application range of the present invention.

Claims

1. An illumination device capable of supporting multiple input voltages, comprising:

a light emitting unit having multiple sets of LED strings, wherein any set of LED strings comprises multiple AC LEDs; and

a plurality of light-emitting driving circuits respectively electrically connected to the light-emitting units, wherein any one of the light-emitting driving circuits receives an alternating-current input voltage and converts the alternating-current input voltage into a working voltage for the light-emitting units;

any one of the light emission driving circuits includes:

a surge protector for inputting the AC input voltage;

a rectifier electrically connected to the surge protector and rectifying the ac input voltage passing through the surge protector into the working voltage for the light emitting unit;

wherein the surge protectors individually provide a threshold voltage for preventing surge, so that the ac input voltages received by the light-emitting driving circuits are different.

2. The illumination device according to claim 1, wherein the light-emitting driving circuit further comprises a protection circuit electrically connected between the rectifier and the light-emitting unit.

3. The lighting device as claimed in claim 2, wherein the protection circuit is one or a combination of an over-current protection circuit and an over-temperature protection circuit.

4. The illumination device as claimed in claim 3, wherein the surge protector is a voltage suppressor or a Metal Oxide Varistor (MOV).

5. The lighting device of claim 2, further comprising a switching switch electrically connected to the light-emitting driving circuit modules, the switching switch receiving the ac input voltage and selectively outputting the ac input voltage to one of the light-emitting driving circuit modules.

6. The illumination device as claimed in claim 5, wherein the switch is a slide switch or a dip switch.

7. The illumination device as claimed in claim 1, wherein the ac input voltages received by the light-emitting driving circuits are 120V, 277V and 480V.

8. The illumination device as claimed in claim 7, wherein the surge protectors are a surge protector with a threshold voltage of 270V, a surge protector with a threshold voltage of 510V, and a surge protector with a threshold voltage of 820V.

9. The lighting device of claim 8, wherein the led strings comprise a first led string, a second led string, a third led string and a fourth led string;

wherein a first end of the first LED lamp string is electrically connected with a plurality of first diodes which are mutually connected in parallel;

wherein a second diode is connected in series between a second end of the first LED lamp string and a first end of the second LED lamp string;

a third diode is electrically connected between the second end of the first LED lamp string and the second diode;

a fourth diode is electrically connected between the first end of the second LED lamp string and the second diode;

a fifth diode is connected between a second end of the second LED lamp string and a first end of the third LED lamp string in series;

the second end of the second LED lamp string is electrically connected with the fifth diode through a plurality of sixth diodes which are mutually connected in parallel;

the first end of the third LED lamp string is electrically connected with the fifth diode through a plurality of seventh diodes which are mutually connected in parallel;

wherein an eighth diode is connected in series between a second end of the third LED lamp string and a first end of the fourth LED lamp string;

a ninth diode is electrically connected between the second end of the third LED lamp string and the eighth diode;

a fourth diode is electrically connected between the first end of the fourth light-emitting diode lamp string and the eighth diode;

the second end of the fourth LED lamp string is electrically connected with a plurality of eleventh diodes which are mutually connected in parallel;

the first LED string, the second LED string, the third LED string and the fourth LED string are respectively formed by connecting fifty alternating current LEDs in series.

10. The lighting device of claim 8, wherein the led strings comprise a first led string, a second led string, a third led string, a fourth led string, a fifth led string, a sixth led string, a seventh led string, an eighth led string, a ninth led string, and a tenth led string;

wherein a first diode is electrically connected between the first LED lamp string and the second LED lamp string;

wherein a second diode is electrically connected between the second LED lamp string and the third LED lamp string;

wherein a third diode is connected between the third LED lamp string and the fourth LED lamp string in series;

wherein a fourth diode is electrically connected between the third LED lamp string and the third diode;

wherein a fifth diode is electrically connected between the fourth LED lamp string and the third diode;

a sixth diode is connected between the fourth LED lamp string and the fifth LED lamp string in series;

wherein a seventh diode is electrically connected between the fourth LED lamp string and the sixth diode;

the fifth light-emitting diode lamp string is electrically connected with the sixth diode through the fourth diode;

a ninth diode is connected between the fifth light-emitting diode lamp string and the sixth light-emitting diode lamp string in series;

wherein a twelfth diode is electrically connected between the fifth LED lamp string and the ninth diode;

wherein an eleventh diode is electrically connected between the sixth LED lamp string and the ninth diode;

wherein a twelfth diode is connected in series between the sixth LED lamp string and the seventh LED lamp string;

wherein a thirteenth diode is electrically connected between the sixth LED lamp string and the twelfth diode;

wherein a fourteenth diode is electrically connected between the seventh light-emitting diode lamp string and the twelfth diode;

wherein a fifteenth diode is connected between the seventh LED lamp string and the eighth LED lamp string in series;

a sixteenth diode is electrically connected between the seventh light-emitting diode lamp string and the fifteenth diode;

wherein a seventeenth diode is electrically connected between the eighth LED lamp string and the fifteenth diode;

the eighth light-emitting diode lamp string is electrically connected with the ninth light-emitting diode lamp;

a nineteenth diode is electrically connected between the ninth light-emitting diode lamp string and the tenth light-emitting diode lamp string;

the first light-emitting diode lamp string and the tenth light-emitting diode lamp string are formed by connecting 2 light-emitting diodes in series, the second light-emitting diode lamp string and the ninth light-emitting diode lamp string are formed by connecting 7 light-emitting diodes in series, the third light-emitting diode lamp string and the eighth light-emitting diode lamp string are formed by connecting 33 light-emitting diodes in series, the fourth light-emitting diode lamp string and the seventh light-emitting diode lamp string are formed by connecting 42 light-emitting diodes in series, and the fifth light-emitting diode lamp string and the sixth light-emitting diode lamp string are formed by connecting 21 light-emitting diodes in series.