CN217307916U

CN217307916U - LED lamp

Info

Publication number: CN217307916U
Application number: CN202220231099.6U
Authority: CN
Inventors: 徐填填; 李杰涛; 曹胜军; 蒲纪忠; 甘彩英; 赵艺佼
Original assignee: CH Lighting Technology Co Ltd
Current assignee: CH Lighting Technology Co Ltd
Priority date: 2022-01-27
Filing date: 2022-01-27
Publication date: 2022-08-26
Anticipated expiration: 2032-01-27

Abstract

The application relates to an LED lamp, which comprises an LED driving circuit and a light-emitting module which are sequentially coupled, wherein the LED driving circuit comprises a rectifying unit, a filtering unit, a power conversion unit and a multi-gear selector switch which are sequentially coupled, the multi-gear selector switch is provided with a switch input end and a plurality of switch output ends, the switch input end is coupled with the power conversion unit, the switch output end comprises a plurality of first output ends and a second output end, and when the multi-gear working selector switch is switched to different gears, the switch input end is connected with one of the switch output ends; the light-emitting module comprises a plurality of light-emitting subunits, the first output ends are correspondingly connected with the anodes of the light-emitting subunits one by one, and the second output ends are connected with the anodes of all the light-emitting subunits through non-return elements. This application multi-gear work change over switch switches over the regulation that realizes light emitting module, prevents the electric current backward flow through contrary component protection circuit, protection circuit.

Description

LED lamp

Technical Field

The application relates to the technical field of lighting, in particular to an LED lamp.

Background

In the prior art, several methods such as pulse width modulation, single chip microcomputer control, voltage feedback control, etc. are usually adopted to control the magnitude of the LED current, thereby realizing power or color temperature dimming. In the above implementation modes, the circuit design is complicated, and once part of lines are damaged, the use of the whole circuit is influenced. Namely, the device design is complex and the circuit stability is poor.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide an LED lamp.

The LED lamp comprises an LED drive circuit and a light-emitting module which are sequentially coupled, wherein the LED drive circuit comprises a rectifying unit, a filtering unit, a power conversion unit and a multi-gear selector switch which are sequentially coupled,

the multi-gear switching switch is provided with a switch input end and a plurality of switch output ends, the switch input end is coupled with the power conversion unit, the switch output end comprises a plurality of first output ends and a second output end, and when the multi-gear working switching switch is switched to different gears, the switch input end is conducted with one of the switch output ends;

the light-emitting module comprises a plurality of light-emitting subunits, the first output ends are connected with the anodes of the light-emitting subunits in a one-to-one correspondence manner, and the second output ends are connected with the anodes of all the light-emitting subunits through non-return elements.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, the color temperature and/or power of the light emitting sub-units are different.

Optionally, the non-return element is a non-inverting diode, the number of the first output ends is two, and the light emitting module includes two light emitting sub-units.

Optionally, the non-return diode includes a first diode and a second diode, and the second output terminal is connected to the anode of the first diode and the anode of the second diode at the same time;

the cathode of the first diode is connected with the anode of a light-emitting photon unit,

and the cathode of the second diode is connected with the anode of the other light-emitting subunit.

Optionally, the LED driving circuit includes a leakage detection unit, an input terminal of the leakage detection unit is coupled to the high potential output terminal of the filtering unit, and an output terminal of the leakage detection unit is coupled to the switch input terminal.

Optionally, the LED driving circuit includes a first resistor, one end of the first resistor is coupled to the high-potential output terminal of the filtering unit, and the other end of the first resistor is coupled to the input terminal of the leakage detecting unit.

Optionally, the LED driving circuit includes a second resistor, one end of the second resistor is coupled to the high-potential output terminal of the filtering unit, and the other end of the second resistor is coupled to the switch input terminal.

Optionally, the power conversion unit includes a control chip and a peripheral circuit thereof, the control chip has a driving end, the peripheral circuit includes an output sub-circuit, and the output sub-circuit includes:

the switch tube is provided with a first pole, a second pole and a driving pole, the first pole is coupled with the low potential output end of the filtering unit, the second pole is coupled with the switch input end, and the driving pole is coupled with the driving end.

Optionally, the LED driving circuit has a first input terminal, a second input terminal and a third input terminal,

the rectifying unit comprises a full-wave rectifying bridge with a first rectifying input, a second rectifying input, a first rectifying output and a second rectifying output,

the first input terminal is connected to the first rectifying input terminal, the second input terminal is connected to the second rectifying input terminal, and the LED driving circuit includes:

a third diode, the anode of which is connected with the third input end and the cathode of which is connected with the first rectification output end;

and the negative electrode of the fourth diode is connected with the third input end, and the positive electrode of the fourth diode is connected with the second rectification output end.

Optionally, the LED lamp includes: a lamp tube, a first end cover and a second end cover which are positioned at two opposite sides of the lamp tube,

the first end cover is provided with a first pin and a second pin, the second end cover is provided with a third pin,

the first pin is connected with the first input end, the second pin is connected with the second input end, and the third pin is connected with the third input end.

The LED drive circuit and the LED lamp at least have the following technical effects:

this application realizes switching on of different luminous subelements through switching on different first output, lights all luminous subelements simultaneously through switching on the second output. When all the light-emitting subunits are lighted, the color mixing of all the light-emitting subunits is realized, and the non-return element protection circuit prevents the current from flowing back and protects the circuit.

Drawings

Fig. 1 is a schematic diagram of a module structure of an LED lamp according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a multi-position switch and a light module according to an embodiment of the present disclosure;

fig. 3 is a schematic circuit diagram of an embodiment of the present application, in which a multi-stage switch is omitted from an LED driving circuit;

fig. 4 is a schematic structural diagram of an LED lamp according to an embodiment of the present application;

the reference numerals in the figures are illustrated as follows:

100. a rectifying unit; 200. a filtering unit; 300. a power conversion unit; 400. a multi-gear selector switch; 500. a backstop element; 600. a light emitting module; 610. a first light emitting unit; 620. a second light emitting unit; 700. a leakage detecting unit;

801. a first end cap; 802. a second end cap; 803. a lamp tube; 810. a first pin; 820. a second pin; 830. a third pin; 840. a fourth pin.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

It is noted that when an element is referred to as being "coupled" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In this application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any particular order or number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements explicitly listed, but may include other elements not expressly listed or inherent to such system or apparatus.

Referring to fig. 1 and 2, an embodiment of the present application provides an LED lamp including a rectifying unit 100, a filtering unit 200, a power converting unit 300, a multi-step switch 400, and a light emitting module 600, which are coupled in sequence. The rectifying unit 100, the filtering unit 200, the power conversion unit 300, and the multi-stage switch 400 coupled in sequence together form an LED driving circuit.

The multi-gear selector switch 400 has a switch input coupled to the power conversion unit 300 and a plurality of switch outputs, each of which includes a plurality of first outputs and a second output, and when the multi-gear selector switch is switched to different gears, the switch input is turned on to one of the switch outputs.

The light emitting module 600 includes a plurality of light emitting sub-units, the first output terminals are connected with the anodes of the light emitting sub-units in a one-to-one correspondence, and the second output terminals are connected with the anodes of all the light emitting sub-units through the non-return element 500.

In this embodiment, the different light-emitting sub-units are turned on by turning on the different first output terminals, and all the light-emitting sub-units are simultaneously turned on by turning on the second output terminals. When all the light-emitting subunits are lighted, the color mixing of all the light-emitting subunits is realized, the non-return element 500 protects the circuit to prevent the current from flowing back, and the circuit is protected.

Further, the color temperature and/or the power of the light emitting subunits are different. The color temperatures are different, that is, the color temperature of the light emitting module 600 is changed when the multi-gear selector switch 400 is switched to different gears; the power is different, that is, the power (brightness) of the light emitting module 600 is changed when the multi-gear selector switch 400 is switched to different gears.

Specifically, the backstop element 500 is a non-inverting diode, and the number of first output terminals is two, and the two terminals are respectively indicated by the reference numerals "1" and "3" on the right side of the multi-step switch 400 shown in fig. 2. The second output terminal is a terminal marked with a number "2" on the right. The light emitting module 600 includes two light emitting sub-units, a first light emitting unit 610 and a second light emitting unit 620.

The first light emitting unit 610 may select, for example, an LED lamp of a model 3500K and/or 4000K, and the second light emitting unit 620 may select an LED lamp of a model 5000K and/or 6500K. The color temperatures of the two are different, and when the multi-gear selector switch 400 is switched to the gear with the numerical label "1", the second light-emitting unit 620 is turned on; when the shift position is switched to the shift position with the numerical mark "3", the first light emitting unit 610 is lighted; when the gear position with the numerical mark of 2 is switched, the first light-emitting unit 610 and the second light-emitting unit 620 are simultaneously lightened, and the intermediate gear color mixing switching is realized. The reverse non-conduction of the non-return diode prevents the current from flowing back to cause a short circuit.

Specifically, the non-return diode includes a first diode D1A and a second diode D1B, and the second output terminal is connected to both the anode of the first diode D1A and the anode of the second diode D1B. The cathode of the first diode D1A is connected to the anode of one light-emitting subunit, and the cathode of the second diode D1B is connected to the anode of the other light-emitting subunit.

Referring to fig. 3, in one embodiment, the LED driving circuit includes a first resistor R17. The LED driving circuit inputs ac power, and the ac power sequentially passes through the rectifying unit 100 and the filtering unit 200, and then is connected to the high potential output terminal of the filtering unit 200 and the low potential output terminal of the filtering unit 200. A first terminal of the first resistor R17 is coupled to the high-voltage output terminal of the filter unit 200 (a resistor R20 is connected between the first terminal of the first resistor R17 and the high-voltage output terminal of the filter unit 200), and a second terminal outputs the dc bus Vbus.

The LED driving circuit further includes a second resistor R18, wherein one end of the second resistor R18 is coupled to the high voltage output terminal of the filtering unit 200 (specifically, the second end of the first resistor R17 is connected), and the other end is coupled to the switch input terminal.

Referring to fig. 3, in one embodiment, the LED driving circuit includes a leakage detecting unit 700, an input terminal of the leakage detecting unit 700 is coupled to the high potential output terminal of the filtering unit 200, and an output terminal of the leakage detecting unit 700 is coupled to the switch input terminal. Specifically, the input terminal of the leakage detecting unit 700 is connected to the second terminal of the first resistor R17.

The power conversion unit 300 comprises a control chip U1 and peripheral circuits thereof, wherein the control chip U1 is provided with a driving end, the peripheral circuits comprise an output sub-circuit, and the output sub-circuit comprises a switch tube Q1 with a first pole, a second pole and a driving pole. A first pole of the switch Q1 is coupled to the low potential output Vbus of the filtering unit 200, a second pole of the switch Q1 is coupled to the switch input (LED +) of the multi-stage switch 400, and a driving pole of the switch Q1 is coupled to the driving terminal of the control chip U1. The model of the control chip U1 may be SY5830, for example, and power conversion is realized by controlling the on-off of the switch tube Q1.

Referring to fig. 3 and 4, the LED driving circuit has a first input terminal (1-N), a second input terminal (1-N1), and a third input terminal (1-L).

The rectifier unit 100 comprises a full-wave rectifier bridge BD1, the full-wave rectifier bridge BD1 having a first rectifier input (pin 1), a second rectifier input (pin 2), a first rectifier output (pin 3), and a second rectifier output (pin 4). The first input (1-N) is connected to the first rectifying input (pin 1), and the second input (1-N1) is connected to the second rectifying input (pin 2).

The LED driving circuit includes a third diode D6 and a fourth diode D7. The anode of the third diode D6 is connected with the third input end (1-L), and the cathode is connected with the first rectification output end (pin 3);

the cathode of the fourth diode D7 is connected to the third input terminal (1-L), and the anode is connected to the second rectification output terminal (pin 4).

Referring to fig. 3 and 4, in one embodiment, an LED light fixture includes a tube 803, a first end cap 801 and a second end cap 802 positioned on opposite sides of the tube 803,

the first end cap 801 is provided with a first pin 810 and a second pin 820, and the second end cap 802 is provided with a third pin 830. The first pin 810 is connected to the first input terminal (1-N), the second pin 820 is connected to the second input terminal (1-N1), and the third pin 830 is connected to the third input terminal (1-L).

In this embodiment, the third pin 830 and the first pin 810 are located on two opposite sides of the lamp tube 803, so that the requirements of single-ended power feeding and double-ended power feeding can be met simultaneously. The second end cap may also have a fourth prong 840 thereon to maintain symmetry of the lamp.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims

The LED lamp comprises an LED driving circuit and a light emitting module which are sequentially coupled, and is characterized in that the LED driving circuit comprises a rectifying unit, a filtering unit, a power conversion unit and a multi-gear selector switch which are sequentially coupled, the multi-gear selector switch is provided with a switch input end and a plurality of switch output ends, the switch input end is coupled with the power conversion unit, the switch output ends comprise a plurality of first output ends and a second output end, and when the multi-gear working selector switch is switched to different gears, the switch input end is connected with one of the switch output ends;

the light-emitting module comprises a plurality of light-emitting subunits, the first output ends are correspondingly connected with the anodes of the light-emitting subunits one by one, and the second output ends are connected with the anodes of all the light-emitting subunits through non-return elements.
2. LED luminaire according to claim 1, characterized in that the color temperature and/or the power of the light-emitting sub-units differ.
3. The LED lamp of claim 1, wherein the non-return element is a non-inverting diode, the number of the first output terminals is two, and the light emitting module comprises two light emitting sub-units.
4. The LED lamp of claim 3, wherein the non-return diode comprises a first diode and a second diode, and the second output is connected to the anode of the first diode and the anode of the second diode simultaneously;

the cathode of the first diode is connected with the anode of a light-emitting photon unit,

and the cathode of the second diode is connected with the anode of the other light-emitting subunit.
5. The LED lamp of claim 1, wherein the LED driving circuit comprises a leakage detection unit, an input of the leakage detection unit is coupled to the high-potential output terminal of the filtering unit, and an output of the leakage detection unit is coupled to the switch input terminal.
6. The LED lamp according to claim 5, wherein the LED driving circuit comprises a first resistor, one end of the first resistor is coupled to the high-potential output terminal of the filtering unit, and the other end of the first resistor is coupled to the input terminal of the leakage detecting unit.
7. The LED lamp according to claim 5, wherein the LED driving circuit comprises a second resistor, one end of the second resistor is coupled to the high-potential output terminal of the filtering unit, and the other end of the second resistor is coupled to the switch input terminal.
8. The LED lamp of claim 1, wherein the power conversion unit includes a control chip with a driving terminal and peripheral circuitry thereof, the peripheral circuitry including an output sub-circuit comprising:

the switch tube is provided with a first pole, a second pole and a driving pole, the first pole is coupled with the low potential output end of the filtering unit, the second pole is coupled with the switch input end, and the driving pole is coupled with the driving end.
9. The LED lamp of claim 1, wherein the LED driver circuit has a first input terminal, a second input terminal, and a third input terminal,

the rectifying unit comprises a full-wave rectifying bridge with a first rectifying input, a second rectifying input, a first rectifying output and a second rectifying output,

the first input terminal is connected to the first rectifying input terminal, the second input terminal is connected to the second rectifying input terminal, and the LED driving circuit includes:

a third diode, the anode of which is connected with the third input end and the cathode of which is connected with the first rectification output end;

and the cathode of the fourth diode is connected with the third input end, and the anode of the fourth diode is connected with the second rectification output end.
10. The LED light fixture of claim 9 wherein the LED light fixture comprises: a lamp tube, a first end cover and a second end cover which are positioned at two opposite sides of the lamp tube,

the first end cover is provided with a first pin and a second pin, the second end cover is provided with a third pin,

the first pin is connected with the first input end, the second pin is connected with the second input end, and the third pin is connected with the third input end.