CN217684876U

CN217684876U - LED lamp

Info

Publication number: CN217684876U
Application number: CN202220720315.3U
Authority: CN
Inventors: 吕少华; 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: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-10-28
Anticipated expiration: 2032-03-29

Abstract

The application discloses an LED lamp, which comprises a lamp tube, a first end cover and a second end cover, wherein the first end cover and the second end cover are arranged on two opposite sides of the lamp tube; the LED drive circuit includes: the light-emitting diode comprises a rectifying unit, a power conversion unit and a light-emitting unit which are sequentially coupled, wherein the rectifying unit is provided with a first rectifying input end and a second rectifying input end, the first input end and the second input end are both coupled to the first rectifying input end, and an overcurrent protection element is coupled between the first input end and the second input end; the third input terminal and the fourth input terminal are both coupled to the second rectifying input terminal, and an overcurrent protection element is coupled between the third input terminal and the fourth input terminal.

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, when the LED lamp with double-end power input is mistakenly connected with single-end power input, the problem of power utilization safety is easily caused.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide an LED lamp for solving the above technical problems.

The LED lamp comprises a lamp tube, a first end cover and a second end cover, wherein the first end cover and the second end cover are positioned on 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 and a fourth pin,

an LED driving circuit is arranged in the lamp tube, the LED driving circuit is provided with a first input end, a second input end, a third input end and a fourth input end, the first pin is connected with the first input end, the second pin is connected with the second input end, the third pin is connected with the third input end, and the fourth pin is connected with the fourth input end;

the LED drive circuit includes: a rectifying unit, a power conversion unit and a light-emitting unit which are coupled in sequence, wherein the rectifying unit is provided with a first rectifying input end and a second rectifying input end,

the first input end and the second input end are both coupled to the first rectifying input end, and a first overcurrent protection element is coupled between the first input end and the second input end;

the third input end and the fourth input end are both coupled to the second rectification input end, and a second overcurrent protection element is coupled between the third input end and the fourth input end.

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 first overcurrent protection element and the second overcurrent protection element are fuses.

Optionally, the LED driving circuit includes an anti-surge unit, and the anti-surge unit includes:

a first capacitor, one end of which is coupled to the high potential output end of the rectifying unit, and the other end of which is coupled to the low potential output end of the rectifying unit;

and the first piezoresistor is connected with the first capacitor in parallel.

Optionally, the power conversion unit includes a control chip and its peripheral circuits, the control chip has a power supply terminal, a sampling terminal and an output terminal,

the power supply end is coupled to a high-potential output end of the rectifying unit, and the output end is coupled to a high-potential input end of the light-emitting unit.

Optionally, the peripheral circuit includes a power supply electronic circuit, and the power supply electronic circuit includes:

and one end of the second resistor is coupled to the high-potential output end of the rectifying unit, and the other end of the second resistor is coupled to the power supply end.

Optionally, the light emitting unit is an LED lamp bead, the peripheral circuit includes an output sub-circuit, and the output sub-circuit includes:

the anode of the first diode is coupled to the output end, and the cathode of the first diode is coupled to the anode of the LED lamp bead;

and one end of the first inductor is coupled to the anode of the first diode, and the other end of the first inductor is coupled to the cathode of the LED lamp bead.

Optionally, the peripheral circuit includes a secondary filtering sub-circuit, and the secondary filtering sub-circuit includes:

the second capacitor is connected in parallel to two ends of the LED lamp bead;

and the third resistor is connected with the second capacitor in parallel.

Optionally, the peripheral circuit includes a sampling sub-circuit, and the sampling sub-circuit includes:

a fourth resistor, a first end of which is coupled to the sampling end;

one end of the third capacitor is coupled to the second end of the fourth resistor, and the other end of the third capacitor is coupled to the negative electrode of the LED lamp bead;

and the fifth resistor is connected with the fourth resistor in parallel.

The LED lamp at least has the following technical effects:

this application advances under the condition that electric lamps and lanterns mistake receiving single-ended entering electricity of electricity at the bi-polar, two pins that the double-phase offside of fluorescent tube set up, for example first pin and second pin, through setting up the first overcurrent protection component protection circuit between two pins, avoid the emergence of power consumption safety problem.

Drawings

Fig. 1 is a schematic structural diagram of an LED lamp according to an embodiment of the present application;

fig. 2 is a schematic block diagram of a built-in LED driving circuit in an LED lamp according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of an LED driving circuit according to an embodiment of the present disclosure.

The reference numerals in the figures are illustrated as follows:

101. a first input terminal; 102. a second input terminal; 103. a third input terminal; 104. a fourth input terminal;

110. a first overcurrent protection element; 120. a second overcurrent protection element;

200. a rectifying unit; 300. a power conversion unit; 400. a light emitting unit;

900. an LED lamp; 910. a first end cap; 920. a second end cap; 901. a first pin; 902. a second pin; 903. a third pin; 904. 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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" or "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.

LED lamps are typically built with LED driving circuitry. For the LED lamp tube with double-end power supply, the built-in LED driving circuit is provided with two pairs of input ends respectively corresponding to two opposite side pins of the LED lamp tube. When the LED lamp tube with double-end power input is mistakenly connected to a lamp with single-end power input, the safety problem of power utilization, such as lamp burning and tripping, is caused.

Referring to fig. 1 to 3, in an embodiment of the present application, an LED lamp 900 is provided, where the LED lamp 900 includes a lamp tube, and a first end cap 910 and a second end cap 920 located at two opposite sides of the lamp tube, the first end cap 910 is provided with a first pin 901 and a second pin 902, and the second end cap 920 is provided with a third pin 903 and a fourth pin 904.

The lamp tube is internally provided with an LED driving circuit which is provided with a first input end 101, a second input end 102, a third input end 103 and a fourth input end 104. The first pin 901 is connected to the first input terminal 101, the second pin 902 is connected to the second input terminal 102, the third pin 903 is connected to the third input terminal 103, and the fourth pin 904 is connected to the fourth input terminal 104.

The LED driving circuit includes a rectifying unit 200, a power converting unit 300, and a light emitting unit 400 coupled in sequence, wherein the rectifying unit 200 has a first rectifying input terminal and a second rectifying input terminal. The first input end 101 and the second input end 102 are both coupled to a first rectification input end, and a first overcurrent protection element 110 is coupled between the first input end 101 and the second input end 102; the third input terminal 103 and the fourth input terminal 104 are both coupled to the second rectifying input terminal, and a second overcurrent protection element 120 is coupled between the third input terminal 103 and the fourth input terminal 104.

In this embodiment, when a lamp with a double-end power input is erroneously connected to a single-end power input, two pins, such as the first pin 901 and the second pin 902, disposed on two opposite sides of the lamp tube protect the circuit through the first overcurrent protection element 110 disposed between the two pins, so as to avoid the occurrence of electrical safety problems. The third pin 903 and the fourth pin 904 are similar. Moreover, two pins on the same side can be electrified, and power supply can be realized only by ensuring that one pin is electrified, so that the LED lamp is easier to light when being installed and used.

The lamp tube may be, for example, a T5 lamp tube or a T8 lamp tube, and the first to fourth pins of the LED lamp 900 are correspondingly electrically connected to the first to fourth input ends of the LED driving circuit, and are connected to the commercial power to supply power to the LED driving circuit. The rectifying unit 200 may be, for example, a full-wave rectifier bridge BD1, and the power converting unit 300 adjusts the light emitting power of the light emitting unit 400. Specifically, the first overcurrent protection element 110 may be, for example, a fuse F1, and the second overcurrent protection element 120 may be, for example, a fuse F2. When the lamp tube with double-end power input is mistakenly connected with single-end power input, the fuse fuses the protection circuit.

In one embodiment, the LED driving circuit includes an anti-surge unit including a first capacitor C1 and a first varistor RV1. One end of the first capacitor C1 is coupled to the high potential output terminal (Vbus +) of the rectifying unit 200, and the other end is coupled to the low potential output terminal (specifically, the ground terminal in fig. 3) of the rectifying unit 200. The first voltage dependent resistor is connected in parallel with the first capacitor.

In one embodiment, the power conversion unit 300 includes a control chip U1 and its peripheral circuits, the control chip U1 has a power supply terminal HVDD, a sampling terminal CS and an output terminal Drain (shown as pin 5 or pin 6 of the control chip), the power supply terminal HVDD is coupled to the high potential output terminal of the rectification unit 200, and the output terminal Drain is coupled to the high potential input terminal of the light emitting unit 400.

In one embodiment, the peripheral circuit includes a power supply circuit, the power supply circuit includes a second resistor R3, one end of the second resistor R3 is coupled to the high voltage output terminal of the rectifying unit 200, and the other end is coupled to the power supply terminal HVDD.

In one embodiment, the light emitting unit 400 is an LED lamp bead, and the peripheral circuit includes an output sub-circuit including a first diode D1 and a first inductor T1. The anode of the first diode D1 is coupled to the output end Drain, and the cathode of the first diode D1 is coupled to the anode of the LED lamp bead. One end of the first inductor T1 is coupled to the anode of the first diode, and the other end of the first inductor T1 is coupled to the cathode of the LED lamp bead. The LED beads are not shown in fig. 3, in practice the LED beads are arranged between LED + and LED-.

In one embodiment, the peripheral circuit includes a secondary filtering sub-circuit including a second capacitor C4 and a third resistor R2. The second capacitor C4 is connected in parallel to two ends of the LED lamp bead; the third resistor R2 is connected in parallel with the second capacitor.

In one embodiment, the peripheral circuit includes a sampling sub-circuit including a fourth resistor RS1, a fifth resistor RS2, and a third capacitor C3. The first end of the fourth resistor RS1 is coupled to the sampling terminal CS, and the fifth resistor RS2 is connected in parallel with the fourth resistor. One end of the third capacitor C3 is coupled to the second end of the fourth resistor, and the other end of the third capacitor C3 is coupled to the negative electrode of the LED lamp bead.

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. Features of different embodiments are shown in the same drawing, which is to be understood as also disclosing combinations of the various embodiments concerned.

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is specific and detailed, but not construed as limiting the scope of 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, and these are all within the scope of protection of the present application.

Claims

An LED lamp comprises a lamp tube, a first end cover and a second end cover, wherein the first end cover and the second end cover are positioned on two opposite sides of the lamp tube, a first pin and a second pin are arranged on the first end cover, a third pin and a fourth pin are arranged on the second end cover,

the LED lamp tube is internally provided with an LED driving circuit, and is characterized in that the LED driving circuit is provided with a first input end, a second input end, a third input end and a fourth input end, the first pin is connected with the first input end, the second pin is connected with the second input end, the third pin is connected with the third input end, and the fourth pin is connected with the fourth input end;

the LED drive circuit includes: a rectifying unit, a power conversion unit and a light-emitting unit which are coupled in sequence, wherein the rectifying unit is provided with a first rectifying input end and a second rectifying input end,

the first input end and the second input end are both coupled to the first rectifying input end, and a first overcurrent protection element is coupled between the first input end and the second input end;

the third input end and the fourth input end are both coupled to the second rectification input end, and a second overcurrent protection element is coupled between the third input end and the fourth input end.
2. The LED lamp of claim 1, wherein the first and second over-current protection elements are fuses.
3. The LED light fixture of claim 1 wherein the LED drive circuit includes an anti-surge unit, the anti-surge unit comprising:

a first capacitor, one end of which is coupled to the high potential output end of the rectifying unit, and the other end of which is coupled to the low potential output end of the rectifying unit;

and the first piezoresistor is connected with the first capacitor in parallel.
4. The LED lamp of claim 1, wherein the power conversion unit comprises a control chip and its peripheral circuits, the control chip has a power supply terminal, a sampling terminal and an output terminal,

the power supply end is coupled to a high-potential output end of the rectifying unit, and the output end is coupled to a high-potential input end of the light-emitting unit.
5. The LED light fixture of claim 4 wherein the peripheral circuitry includes power electronics circuitry comprising:

and one end of the second resistor is coupled to the high-potential output end of the rectifying unit, and the other end of the second resistor is coupled to the power supply end.
6. The LED lamp of claim 4, wherein the light emitting unit is an LED lamp bead, the peripheral circuit comprises an output sub-circuit, and the output sub-circuit comprises:

the anode of the first diode is coupled to the output end, and the cathode of the first diode is coupled to the anode of the LED lamp bead;

and one end of the first inductor is coupled to the anode of the first diode, and the other end of the first inductor is coupled to the cathode of the LED lamp bead.
7. The LED light fixture of claim 4 wherein the peripheral circuitry includes a secondary filtering sub-circuit comprising:

the second capacitor is connected in parallel to two ends of the LED lamp bead;

and the third resistor is connected with the second capacitor in parallel.
8. The LED light fixture of claim 4 wherein the peripheral circuitry includes a sampling sub-circuit comprising:

a fourth resistor, a first end of which is coupled to the sampling end;

one end of the third capacitor is coupled to the second end of the fourth resistor, and the other end of the third capacitor is coupled to the negative electrode of the LED lamp bead;

and the fifth resistor is connected with the fourth resistor in parallel.