CN212413487U

CN212413487U - LED lamp

Info

Publication number: CN212413487U
Application number: CN202021957335.XU
Authority: CN
Inventors: 何耀中
Original assignee: Goldblatt Technology Holdings Ltd
Current assignee: Goldblatt Technology Holdings Ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2021-01-26
Anticipated expiration: 2030-09-09

Abstract

The utility model discloses a LED lamp, including LED lamp cluster, freewheel diode, energy storage inductance, rectification structure and constant current control chip, after LED lamp cluster and the serial-type electric connection of energy storage inductance, common parallel electric connection is on freewheel diode, freewheel diode and constant current control chip electric connection, freewheel diode and constant current control chip all with rectification structure electric connection. The utility model discloses in, through setting up the energy storage inductance, it can produce the self-induced electromotive force that hinders the current variation to avoid the LED lamp cluster to take place the voltage current sudden change, play smooth current's effect, it has still set up freewheeling diode simultaneously, and it also can prevent the voltage current sudden change, further avoids the LED lamp cluster to take place the condition of damage because of the current voltage sudden change, is applicable to large quantity LED lamp cluster and uses, just the utility model discloses in still set up the constant current control chip, can maintain the operating current stability of LED lamp cluster, make it obtain high light efficiency.

Description

LED lamp

Technical Field

The utility model belongs to the technical field of the lamp design and specifically relates to a LED lamp is related to.

Background

The lamp is a common lighting product, the LED lamp is the most common one of the lamps, the LED lamp is usually required to be connected into a circuit to obtain power supply, and when the number of the LED lamps is small, the LED lamp is usually connected into the circuit simply because the power supply requirement is not high.

However, as the demand of people increases, sometimes a plurality of LED lamps are required to perform lighting work simultaneously, if the number of the LED lamps exceeds 60, the power supply requirement for the LED lamps is also correspondingly improved, the conventional simple LED lamp access circuit is often difficult to ensure the simultaneous working requirement of a large number of LED lamps, especially when the current and voltage change is large in a moment, such as the switch of a power supply, the LED lamps are easily damaged, and the use requirement of people is difficult to meet.

On the other hand, the light efficiency of the access circuit of the conventional LED lamp is not high, the energy consumption is high, and particularly, when a large number of LED lamps work, the problem is more prominent, and great waste is caused to resources.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a LED lamp can solve one or more in the above-mentioned problem.

According to the utility model discloses an aspect provides a LED lamp, including LED lamp cluster, freewheel diode, energy storage inductance, rectification structure and constant current control chip, after LED lamp cluster and the serial-type electric connection of energy storage inductance, common parallel electric connection is on freewheel diode, freewheel diode and constant current control chip electric connection, freewheel diode and constant current control chip all with rectification structure electric connection.

The utility model has the advantages that: the utility model discloses in, the rectifying structure then can be fit for the work of LED lamp cluster for the convenient electric current form of input, guarantee the operational reliability of LED lamp cluster, and through setting up the energy storage inductance, it can produce the self-induced electromotive force that hinders the electric current change, thereby avoid the LED lamp cluster to take place the voltage electric current sudden change, play smooth current's effect, it has still set up freewheeling diode simultaneously, it also can prevent the voltage electric current sudden change, further avoid the LED lamp cluster because of the condition that the current-voltage sudden change takes place the damage, can be applicable to the LED lamp cluster of large quantity and use. And the utility model discloses in still set up the constant current control chip, the operating current that can effectively maintain LED lamp cluster is stable to make it obtain high light efficiency, with the waste of reduction resource.

In some embodiments, the LED light string includes k LED light string branches, the LED light string branches include n unit LED light strings, n unit LED light strings are electrically connected in series, k LED light string branches are electrically connected in parallel, the k value is greater than or equal to 1, and the n value is 60 to 72. Therefore, the utility model discloses a LED lamp cluster can adapt to user's multiple needs to be fit for the different use scenes, and the experiment records, contains LED lamp cluster branch road and unit LED lamp cluster under the above-mentioned quantity, enables the utility model provides a LED lamp cluster has outstanding light efficiency and energy consumption.

In some embodiments, the rectifying structure includes a rectifying diode group, a first polarity capacitor and an inductor, the rectifying diode group includes four sequentially connected rectifying diodes, one end of the rectifying diode group, the inductor and one end of the first polarity capacitor are sequentially electrically connected, and the other end of the first polarity capacitor is electrically connected to the other end of the rectifying diode group. Therefore, the rectifying structure adopts a bridge structure, and can effectively rectify the input current so as to ensure that the input current can meet the use requirement of the LED lamp string.

In some embodiments, the present invention further comprises an electromagnetic interference suppressing structure, wherein the electromagnetic interference suppressing structure is electrically connected to the LED light string in parallel. The structure for inhibiting electromagnetic interference can effectively reduce the influence of electromagnetic interference on the LED lamp string and the environment, and improve the working reliability of the LED lamp string.

In some embodiments, the emi suppression structure includes a second polarity capacitor, a first resistor, and a first capacitor, wherein the second polarity capacitor is electrically connected to the LED string in parallel, and the first resistor and the first capacitor are electrically connected in parallel and then connected in parallel to the second polarity capacitor. The second polar capacitor and the first capacitor can effectively filter out high-frequency disturbance on the circuit through the filtering action of the first capacitor and the second capacitor.

In some embodiments, the present invention further comprises a second capacitor, wherein the electromagnetic interference suppressing structure is electrically connected to the second capacitor.

In some embodiments, the present invention further comprises a power adjustment structure, wherein the power adjustment structure is electrically connected to the constant current control chip. The power adjusting structure can conveniently adjust the power of the LED lamp string, so that the brightness of the LED lamp string is adjusted.

In some embodiments, the power adjustment structure includes a first sampling resistor and a second sampling resistor, the first sampling resistor is electrically connected to the second sampling resistor in parallel, and the first sampling resistor is electrically connected to the constant current control chip. The first sampling resistor and the second sampling resistor can be used for sampling current and voltage in the circuit conveniently, so that the constant current control chip can adjust working current and voltage of the LED lamp string conveniently, and the power of the constant current control chip can meet the requirements of users.

In some embodiments, the present invention further comprises a third capacitor electrically connected in parallel to the freewheeling diode. The arrangement of the third capacitor can protect the freewheeling diode and reduce the interference of the freewheeling diode to other structures.

Drawings

Fig. 1 is a schematic circuit diagram of an LED lamp according to an embodiment of the present invention.

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

Fig. 3 is a schematic circuit diagram of an LED light string according to an embodiment of the present invention.

Fig. 4 is a schematic circuit diagram of an LED light string according to an embodiment of the present invention.

Fig. 5 is a schematic circuit diagram of an LED light string according to an embodiment of the present invention.

In the figure: the LED lamp string comprises an LED lamp string, 2 freewheeling diodes, 3 energy storage inductors, 4 rectifying structures, 5 constant current control chips, 11 LED lamp string branches, 12 unit LED lamp strings, 41 rectifying diode groups, 42 inductors, 43 first polarity capacitors, 44 third resistors, 411 rectifying diodes, 6 electromagnetic interference suppression structures, 61 second polarity capacitors, 62 first resistors, 63 first capacitors, 7 second capacitors, 8 power adjustment structures, 81 first sampling resistors, 82 second sampling resistors, 9 third capacitors, 10 second resistors, 20 fourth capacitors, 30 piezoresistors, 40 fourth resistors and 50 fuses.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1

Referring to fig. 1 and 2, an LED lamp of the present embodiment includes an LED string 1, a freewheeling diode 2, an energy storage inductor 3, a rectifying structure 4, and a constant current control chip 5.

The LED string 1 may include k LED string branches 11, and each LED string branch 11 may include n unit LED strings 12, where n may be an integer from 60 to 72, k may be an integer greater than or equal to 1, and is particularly preferably an integer from 1 to 4, in this embodiment, the number of LED string branches 11 is preferably 1, and the number of unit LED strings 12 is preferably 60. The 60 unit LED lamp strings 12 are electrically connected in series, and the LED lamp string 1 is electrically connected with the energy storage inductor 3.

And the LED lamp string 1 and the energy storage inductor 3 are electrically connected and then electrically connected to the fly-wheel diode 2 in a common parallel mode.

The constant current control chip 5 can be a commercially available BP2866 chip, which contains a CS pin, two DRAIN pins, an HV pin, an NC pin, an ROVP pin, a GND pin, and the like. And the GND pin of the constant current control chip 5 is connected with the negative electrode, the NC pin can be left empty, and the freewheeling diode 2 is electrically connected with the two DRAIN pins on the constant current control chip 5.

The rectifying structure 4 includes a rectifying diode group 41, an inductor 42, and a first polarity capacitor 43, where the rectifying diode group 41 includes four rectifying diodes 411 electrically connected in sequence, one end of the rectifying diode group 41 is electrically connected to one end of the inductor 42, the other end of the inductor 42 is electrically connected to one end of the first polarity capacitor 43, the other end of the first polarity capacitor 43 is electrically connected to the other end of the rectifying diode group 41, and the end of the first polarity capacitor 43 connected to the rectifying diode group 41 is connected to the negative electrode.

The rectifying structure 4 may further include a third resistor 44, and the third resistor 44 is electrically connected to the inductor 42 in parallel, so as to protect the inductor 42.

The rectifying structure 4 is further electrically connected with the HV pin of the constant current control chip 5, so that when the external circuit is connected, the external circuit can supply power to the constant current control chip 5 through the rectifying structure 4.

The LED lamp of the present embodiment further includes an electromagnetic interference suppressing structure 6, where the electromagnetic interference suppressing structure 6 includes a second polarity capacitor 61, a first resistor 62 and a first capacitor 63, the second polarity capacitor 61 is electrically connected to the LED lamp string 1 in parallel, the first resistor 62 and the first capacitor 63 are electrically connected in parallel, and after the first resistor 62 and the first capacitor 63 are connected, they are connected in parallel to the second polarity capacitor 61.

The LED lamp of this embodiment further includes a second capacitor 7, one end of the second capacitor 7 is connected to the negative electrode, and the other end is electrically connected to the electromagnetic interference suppression structure 6, that is, the electromagnetic interference suppression structure 6 is connected to the negative electrode through the second capacitor 7.

The LED lamp of this embodiment further includes a power adjustment structure 8, where the power adjustment structure 8 includes a first sampling resistor 81 and a second sampling resistor 82, the first sampling resistor 81 is electrically connected to the second sampling resistor 82 in parallel, one end of the first sampling resistor 81 is electrically connected to the CS pin of the constant current control chip 5, and the other end of the first sampling resistor 81 is connected to the negative electrode.

The LED lamp of this embodiment further includes a third capacitor 9, and the third capacitor 9 is electrically connected to the freewheeling diode 2 in parallel to protect the freewheeling diode 2.

The LED lamp of this embodiment further includes a second resistor 10, one end of the second resistor 10 is electrically connected to the ROVP pin of the constant current control chip 5, the other end of the second resistor 10 is connected to the negative electrode, and the second resistor 10 can perform an overvoltage protection function.

When the LED lamp of this embodiment is in use, through rectification structure 4 can with external circuit electric connection for the external circuit supplies power for this LED lamp, makes LED lamp cluster 1 carry out luminous work. In addition, in order to further ensure the safety of the external circuit connected thereto, a fourth capacitor 20, a voltage dependent resistor 30, a fourth resistor 40 and a fuse 50 can be connected between the external circuit and the rectifying structure 4.

The rectifying structure 4 can rectify the current input by the external circuit, so that the current form can meet the use of the LED lamp string 1.

The energy storage inductor 3 can generate self-induced electromotive force for blocking current change, namely, when the current is increased, the self-induced electromotive force of the energy storage inductor 3 is opposite to the original current direction, and when the current is decreased, the direction of the self-induced electromotive force of the energy storage inductor 3 is the same as the original current direction. Therefore, the current passing through the LED lamp string 1 is prevented from sudden change, the function of smoothing the current is achieved, and the condition that the LED lamp string is damaged due to sudden change of current and voltage is avoided. The freewheeling diode 2 arranged in parallel can also prevent voltage and current from suddenly changing, further avoid the LED lamp string 1 from being damaged due to sudden change of current and voltage, and is particularly suitable for the use of a large number of LED lamp strings 1.

In addition, when the user adjusts the external input current and voltage to change the size of the LED light string 1, the first sampling resistor 81 and the second sampling resistor 82 can sample the current and voltage in the circuit, so that the constant current control chip 5 can timely adjust the working current and voltage of the LED light string 1, and the power of the constant current control chip can meet the requirements of the user.

Example 2

Referring to fig. 1 and 3, the LED lamp of the present embodiment has the same structure as the LED lamp of embodiment 1 except that the structure of the LED lamp string 1 is different, and the structure of each component and the relation between each component, including the relation between the LED lamp string 1 and other components, are the same as those of the LED lamp of embodiment 1.

The LED light string 1 of the present embodiment includes LED light string branches 11, the number of the LED light string branches 11 is preferably 2, each LED light string branch 11 preferably includes 65 unit LED light strings 12, the 65 unit LED light strings 12 in each LED light string branch 11 are electrically connected in series, and the 2 LED light string branches 11 are electrically connected in parallel.

Example 3

Referring to fig. 1 and 4, the LED lamp of the present embodiment has the same structure as the LED lamp of embodiment 1 except that the structure of the LED lamp string 1 is different, and the structure of each component and the relation between each component, including the relation between the LED lamp string 1 and other components, are the same as those of the LED lamp of embodiment 1.

The LED light string 1 of the present embodiment includes LED light string branches 11, the number of the LED light string branches 11 is preferably 3, each LED light string branch 11 preferably includes 70 unit LED light strings 12, the 70 unit LED light strings 12 in each LED light string branch 11 are electrically connected in series, and the 3 LED light string branches 11 are electrically connected in parallel.

Example 4

Referring to fig. 1 and 5, the LED lamp of the present embodiment has the same structure as the LED lamp of embodiment 1 except that the structure of the LED lamp string 1 is different, and the structure of each component and the relation between each component, including the relation between the LED lamp string 1 and other components, are the same as those of the LED lamp of embodiment 1.

The LED light string 1 of the present embodiment includes LED light string branches 11, the number of the LED light string branches 11 is preferably 4, each LED light string branch 11 preferably includes 72 unit LED light strings 12, the 72 unit LED light strings 12 in each LED light string branch 11 are electrically connected in series, and the 4 LED light string branches 11 are electrically connected in parallel.

What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims

The LED lamp is characterized by comprising an LED lamp string, a fly-wheel diode, an energy storage inductor, a rectifying structure and a constant current control chip, wherein the LED lamp string and the energy storage inductor are electrically connected in series and then are electrically connected in parallel together on the fly-wheel diode, the fly-wheel diode is electrically connected with the constant current control chip, and the fly-wheel diode and the constant current control chip are electrically connected with the rectifying structure.
2. The LED lamp of claim 1, wherein the LED lamp string comprises k LED lamp string branches, the LED lamp string branches comprise n unit LED lamp strings, n unit LED lamp strings are electrically connected in series, k LED lamp string branches are electrically connected in parallel, the k value is greater than or equal to 1, and the n value is 60-72.
3. The LED lamp of claim 1, wherein the rectifying structure comprises a rectifying diode group, a first polarity capacitor and an inductor, the rectifying diode group comprises four sequentially connected rectifying diodes, one end of the rectifying diode group, the inductor and one end of the first polarity capacitor are sequentially electrically connected, and the other end of the first polarity capacitor is electrically connected with the other end of the rectifying diode group.
4. The LED lamp of claim 1, comprising an emi suppression structure electrically connected in parallel with the LED string.
5. The LED lamp of claim 4, wherein the EMI suppression structure comprises a second polarity capacitor, a first resistor and a first capacitor, the second polarity capacitor is electrically connected to the LED string in parallel, and the first resistor and the first capacitor are electrically connected in parallel and then connected in parallel to the second polarity capacitor.
6. The LED lamp of claim 4, comprising a second capacitor, wherein the EMI suppression structure is electrically connected to the second capacitor.
7. The LED lamp of claim 1, comprising a power adjustment structure electrically connected to the constant current control chip.
8. The LED lamp of claim 7, wherein the power adjustment structure comprises a first sampling resistor and a second sampling resistor, the first sampling resistor is electrically connected to the second sampling resistor in parallel, and the first sampling resistor is electrically connected to the constant current control chip.
9. The LED lamp of claim 1, comprising a third capacitor electrically connected in parallel to the freewheeling diode.