CN211909243U

CN211909243U - LED lamp

Info

Publication number: CN211909243U
Application number: CN202020685866.1U
Authority: CN
Inventors: 刘涛; 孙志前; 刘凯
Original assignee: PLUSRITE ELECTRIC (CHINA) CO LTD
Current assignee: PLUSRITE ELECTRIC (CHINA) CO LTD
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2020-11-10
Anticipated expiration: 2030-04-29

Abstract

The utility model relates to the field of LEDs, and particularly discloses an LED lamp which comprises a non-isolated driving power supply, a light-emitting component and at least one absorption resistor, wherein the non-isolated driving power supply supplies power to the LED lamp, the light-emitting component comprises at least one lamp bead, the lamp bead is connected with the non-isolated driving power supply, the absorption resistor is connected in parallel with two ends of the lamp bead, and when the LED lamp is turned on, the lamp bead is in a low impedance state, and the lamp bead is normally turned on; when the LED lamp detects no man, the LED lamp adjusts luminance to 0%, and the lamp pearl is in the high impedance state, the utility model discloses an absorbed resistance connects in parallel at the both ends of lamp pearl for the small electric current that originally passes through the lamp pearl no longer flows through the lamp pearl, but flows through absorbed resistance, thereby no longer has the afterglow when making LED lamp close.

Description

LED lamp

Technical Field

The utility model relates to a LED field, concretely relates to LED lamps and lanterns.

Background

Along with the development of the LED to intellectualization, more and more LED lamps and lanterns begin to use control devices such as inductors, for example, infrared inductor, microwave inductor, time control device, light control device and so on, compare with traditional LED lamps and lanterns, LED response lamps and lanterns are more energy-conserving, also more made things convenient for consumer's daily life, LED response lamps and lanterns more extensive use is in illumination fields such as indoor commercial official working such as road lighting, outdoor lighting, and warehouse lighting, thereby open and close to lamps and lanterns through the monitoring to human body or light and control.

The mode that utilizes controlling means such as inductor to close LED lamps and lanterns among the prior art belongs to soft turn-off mode, and after LED lamps and lanterns were closed, lamps and lanterns did not with power disconnection, lamps and lanterns whole still are in electrified state, and when using non-isolation LED drive power supply, the phenomenon that the soft back of shutting down of LED lamps and lanterns, lamp pearl still slightly shines can appear, influences user experience and LED's life.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve among the prior art LED lamps and lanterns turn-off mode and adopt soft turn-off, when using non-isolation drive power supply, can appear still slightly luminous phenomenon after the LED lamps and lanterns close, there is the afterglow in LED lamps and lanterns promptly, provide a new LED lamps and lanterns, can eliminate LED lamps and lanterns afterglow.

The utility model adopts the technical proposal that:

an LED light fixture comprising:

a non-isolated drive power supply that supplies power to the LED lamp;

the light-emitting component comprises at least one lamp bead, and the lamp bead is connected with the non-isolated driving power supply;

and the absorbing resistors are connected in parallel at two ends of the lamp bead.

Furthermore, the LED lamp further comprises a control unit, wherein the output end of the control unit is connected with the non-isolated driving power supply and is used for controlling the LED lamp to be turned on or turned off.

Further, the control unit includes:

a sensor for detecting environmental information;

the controller is connected with the inductor;

and the input end of the control circuit is connected with the controller, and the output end of the control circuit is connected with the non-isolated driving power supply.

Further, the sensor adopts an infrared receiving probe.

Further, the control circuit comprises at least one voltage amplifier U2A and a switch tube Q1, wherein a first input end of the voltage amplifier U2A is connected with the controller, an output end of the voltage amplifier U2A is connected with a first end of a switch tube Q1, a second end of the switch tube Q1 is connected with a power supply, a third end of the switch tube Q1 is grounded, and meanwhile, a second end of the switch tube Q1 and a third end of the switch tube Q1 are connected with the non-isolated driving power supply.

Furthermore, the non-isolated driving power supply comprises a rectifying circuit, a first filter circuit and a PWM dimming circuit, the input end of the rectifying circuit is connected with the mains supply, and the output signal of the rectifying circuit is output to the lamp bead after passing through the first filter circuit, the voltage conversion circuit and the PWM dimming circuit.

Further, the non-isolated driving power supply further comprises a voltage conversion circuit, the voltage conversion circuit comprises a transformer, the input end of the transformer is connected with the first filter circuit, and the output end of the transformer is connected with the LED lamp beads for supplying power.

Further, the resistance value range of the absorption resistor is 1K omega-5.1K omega.

Further, the LED lamp further comprises an aluminum substrate and a radiator, the lamp beads are mounted on the aluminum substrate, and the aluminum substrate is fixed on the radiator.

Compared with the prior art, the beneficial effects of the utility model are that:

when the LED lamp is started, the lamp beads are in a low impedance state, and the lamp beads are normally lighted; when the LED lamp detects no man, the LED lamp adjusts luminance to 0%, and the lamp pearl is in the high impedance state, the utility model discloses an absorbed resistance connects in parallel at the both ends of lamp pearl for the small electric current that originally passes through the lamp pearl no longer flows through the lamp pearl, but flows through absorbed resistance, thereby no longer has the afterglow when making LED lamp close, improves the life of LED lamp.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic block diagram of an LED lamp provided in an embodiment of the present invention;

fig. 2 is a schematic view of a light emitting assembly according to an embodiment of the present invention;

fig. 3 is a circuit diagram of an inductive probe according to an embodiment of the present invention;

fig. 4 is a circuit diagram of a controller according to an embodiment of the present invention;

fig. 5 is a circuit diagram of a control circuit according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a power supply rectification circuit and a first filter circuit provided in an embodiment of the present invention;

fig. 7 is a circuit diagram of a non-isolated driving power supply according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 shows a schematic block diagram of a LED lamp provided in the embodiment of the present invention, this LED lamp includes non-isolated driving power supply, light emitting component and at least one absorption resistor, wherein, non-isolated driving power supply is the power supply of LED lamp, light emitting component includes at least one lamp bead, and non-isolated driving power supply is connected to the lamp bead, and absorption resistor connects in parallel at the both ends of lamp bead.

It should be noted that when the LED lamp is turned on, the lamp bead is in a low impedance state, and the lamp bead is normally turned on; when the LED lamp detects no man, the LED lamp adjusts luminance to 0%, and the lamp pearl is in the high impedance state, the utility model discloses an absorbed resistance connects in parallel at the both ends of lamp pearl for the small electric current that originally passes through the lamp pearl no longer flows through the lamp pearl, but flows through absorbed resistance, thereby no longer has the afterglow when making LED lamp close.

Further, as shown in fig. 2, the LED lamp includes a plurality of LED lamp beads, and the plurality of LED lamp beads can be combined in series or in parallel according to the output brightness requirement, and this embodiment is only one example of the combination of the LED lamp beads, and thus, the present invention is not limited thereto.

Furthermore, the LED lamp further comprises a control unit, and the output end of the control unit is connected with the non-isolated driving power supply and used for controlling the LED lamp to be turned on or turned off.

Further, the control unit includes:

the sensor is used for detecting environmental information;

the controller is connected with the inductor;

As a specific embodiment of the sensor provided in this embodiment, the sensor employs an infrared receiving probe, detects whether there is a person currently and current ambient brightness through the sensor, and outputs a detection result to the controller, specifically, as shown in fig. 3, a circuit diagram of the sensor provided in this embodiment is that a third pin of the sensor is connected to a PD2 terminal of the controller, and outputs the detection result to the controller.

As a specific embodiment of the controller provided in this embodiment, the controller adopted in this embodiment is shown in fig. 4, but of course, other controllers may also be adopted in this embodiment, and this is not limited too much.

As a specific embodiment of the control circuit provided in this embodiment, the control circuit of this embodiment at least includes a voltage amplifier U2A and a switching tube Q1, a first input terminal of the voltage amplifier U2A is connected to the controller, an output terminal of the voltage amplifier U2A is connected to a first terminal of the switching tube Q1, a second terminal of the switching tube Q1 is connected to the power supply, a third terminal of the switching tube Q1 is grounded, and a second terminal of the switching tube Q1 and a third terminal of the switching tube Q1 are connected to the non-isolated driving power supply. When the sensor receives the human body movement signal, the switch tube Q1 is cut off, the control circuit outputs a voltage signal of 1-10V (namely, the two ends of DI M + and DI M-output a voltage signal of 1-10V), when the human body movement signal is not detected, the switch tube Q1 is cut off, and the control circuit outputs a voltage signal of 0V (namely, the two ends of DI M + and DIM-output a voltage signal of 0V).

Specifically, as shown in fig. 5, the control circuit provided in the present embodiment includes two stages of voltage amplifiers, and the controller output signal is amplified by the voltage amplifiers.

The non-isolated driving power supply as a specific embodiment of the non-isolated driving power supply provided by this embodiment includes a rectifying circuit, a first filter circuit and a PWM dimming circuit, an input end of the rectifying circuit is connected to a mains supply, an output signal of the rectifying circuit is output to an LED lamp after passing through the first filter circuit, a voltage conversion circuit and the PWM dimming circuit, a mains supply input at an L/N end of the power supply is converted into a direct current by the rectifying circuit, and is filtered by the first filter circuit into a smooth direct current (non-isolated between input and output), and a 0-10V voltage signal output by a control circuit changes a corresponding output current by the PWM dimming circuit.

Further, as shown in fig. 6 and 7, the non-isolated driving power supply provided by this embodiment further includes a power factor correction circuit and a second filter circuit, and this embodiment further processes the output signal of the rectifier circuit through the power factor correction circuit and the second filter circuit, so that the output signal becomes a smoother direct current.

Further, as shown in fig. 6 and 7, the non-isolated driving power supply provided by this embodiment further includes a voltage conversion circuit, the voltage conversion circuit includes a transformer, an input end of the transformer is connected to the first filter circuit, an output end of the transformer is connected to the LED lamp bead for supplying power, and this embodiment converts the mains voltage into the voltage required by the lamp bead through the voltage conversion circuit.

Further, the absorption resistor provided by the present embodiment includes a chip resistor or a plug resistor.

Further, in order to enable a minute current flowing through the LED lamp set to flow through the absorption resistor when the LED lamp is in soft turn-off, the absorption resistor with a suitable resistance value needs to be set in this embodiment, specifically, the resistance value range of the absorption resistor used in this embodiment is 1K Ω to 5.1K Ω.

In summary, the LED lamp provided in this embodiment can absorb the small current flowing through the lamp bead by connecting an absorbing resistor with a suitable resistance in parallel at the two ends of the lamp bead, so as to eliminate the afterglow of the lamp and prolong the service life of the LED lamp.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present invention includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware that is related to instructions of a program, and the program may be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by the technical solutions of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.

Claims

1. An LED lamp, comprising:

a non-isolated drive power supply that supplies power to the LED lamp;

2. The LED lamp according to claim 1, further comprising a control unit, wherein an output end of the control unit is connected to the non-isolated driving power supply for controlling the LED lamp to be turned on or off.

3. The LED light fixture of claim 2 wherein the control unit comprises:

a sensor for detecting environmental information;

the controller is connected with the inductor;

4. The LED lamp of claim 3, wherein the sensor employs an infrared receiving probe.

5. The LED lamp as claimed in claim 3, wherein the control circuit comprises at least one voltage amplifier U2A and a switch tube Q1, a first input terminal of the voltage amplifier U2A is connected to the controller, an output terminal of the voltage amplifier U2A is connected to a first terminal of a switch tube Q1, a second terminal of the switch tube Q1 is connected to the power supply, a third terminal of the switch tube Q1 is grounded, and a second terminal of the switch tube Q1 and a third terminal of the switch tube Q1 are connected to the non-isolated driving power supply.

6. The LED lamp according to claim 3, wherein the non-isolated driving power supply comprises a rectifying circuit, a first filter circuit and a PWM dimming circuit, the input end of the rectifying circuit is connected with the mains supply, and the output signal of the rectifying circuit is output to the lamp bead after passing through the first filter circuit, the voltage conversion circuit and the PWM dimming circuit.

7. The LED lamp of claim 6, wherein the non-isolated driving power supply further comprises a voltage conversion circuit, the voltage conversion circuit comprises a transformer, an input end of the transformer is connected to the first filter circuit, and an output end of the transformer is connected to the LED lamp bead.

8. The LED lamp of claim 1, wherein the absorption resistor has a resistance value ranging from 1K Ω to 5.1K Ω.

9. The LED lamp according to claim 1, further comprising an aluminum substrate and a heat sink, wherein the lamp bead is mounted on the aluminum substrate, and the aluminum substrate is fixed on the heat sink.