CN210670638U

CN210670638U - Series dimming circuit

Info

Publication number: CN210670638U
Application number: CN201920453368.1U
Authority: CN
Inventors: 徐正祥; 袁继红; 黄廉声
Original assignee: Foshan Lianhan Electronic Technology Co ltd
Current assignee: Foshan Lianhan Electronic Technology Co ltd
Priority date: 2019-04-04
Filing date: 2019-04-04
Publication date: 2020-06-02
Anticipated expiration: 2029-04-04

Abstract

The utility model relates to a drive dimming field, more specifically relates to a series dimming circuit, including power incoming end, power output end, constant current source, dimming controller and LED lamp module, LED lamp module includes a plurality of series connection's LED lamp, and constant current source one end is connected with the power incoming end, and the other end is connected with the LED lamp of series connection head end, the terminal LED lamp of said series connection is connected with the power output end; the dimming controller connects in parallel respectively rather than the LED lamp both ends that correspond, the utility model discloses a series connection dimmer circuit through the LED lamp to a plurality of colours establishes ties, connects the switch that the dimmer controller was used as adjusting luminance in the LED lamp both ends of every colour again and uses, controls through switching on and closing of dimmer controller, can adjust the electric current and the luminance of every LED lamp.

Description

Series dimming circuit

Technical Field

The utility model relates to a drive field of adjusting luminance, more specifically relates to a series dimming circuit.

Background

At present, LED lamp polychrome module is when the drive of adjusting luminance, because of every colour all will adjust luminance, so a module needs a plurality of constant current sources to drive, but, in practical application, because LED lamp polychrome module all comprises more LED lamp, consequently, when needs are regulated and control or are driven to different LED lamps in the circuit, need connect more constant current sources, lead to the structure complicacy of LED lamp module.

Therefore, it is necessary to provide a series dimming circuit that solves the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome above-mentioned prior art at least one defect (not enough), provide a series connection dimmer circuit.

In order to solve the technical problem, the technical scheme of the utility model as follows: a series dimming circuit comprises a power supply access end, a power supply output end, a constant current source, a dimming controller and an LED lamp module,

the LED lamp module comprises a plurality of LED lamps connected in series, one end of the constant current source is connected with the power supply access end, the other end of the constant current source is connected with the LED lamp at the head end of the series, and the LED lamp at the tail end of the series is connected with the power supply output end;

the dimming controllers are respectively connected in parallel at two ends of the corresponding LED lamps, the LED lamps with a plurality of colors are connected in series, the dimming controllers are connected in parallel at two ends of the LED lamps with each color and used as switches for dimming, and the current and the brightness of each LED lamp can be adjusted by controlling the on and off of the dimming controllers.

Further, the dimming controller comprises a signal receiver, a wire and an MOS (metal oxide semiconductor) tube, wherein a drain electrode of the MOS tube is connected to the anode of the LED lamp through the wire, a source electrode of the MOS tube is connected to the cathode of the LED lamp through the wire, a grid electrode of the MOS tube is connected with the signal receiver through the wire, after the signal receiver receives a signal, the corresponding MOS tube can be controlled to be switched on and off rapidly, when the MOS tube is switched on, current does not flow through the corresponding LED lamp any more, at the moment, the corresponding LED lamp is turned off, and when the MOS tube is switched off, the current flows through the LED lamp, and the LED lamp is turned on, so that the MOS tube can control the LED lamp to be turned on and turned off according to the.

Furthermore, dimming control ware includes control switch, wire and the signal receiver who is connected with control switch, control switch passes through the wire and connects in parallel at LED lamp both ends, through control switch's closure and opening, also can realize controlling the purpose of the LED lamp break-make that corresponds equally, and it is also within the protection scope of the utility model.

Further, signal receiver is PWM pulse signal receiving terminal the utility model discloses in, after PWM pulse signal was received to PWM pulse signal receiving terminal, can adjust the break-make time and the luminance of MOS pipe, and the utility model discloses in, at practical application, signal receiver can also adopt other devices to replace, and it is all within the protection scope of the utility model.

Furthermore, the quantity phase-match of dimming controller and the quantity of LED lamp, in practical application, can select to utilize the on-off time and the luminance of a dimming controller control LED lamp, also can be through the on-off time and the luminance of a plurality of LED lamps of dimming controller simultaneous control, it is all within the utility model discloses a within the protection scope.

Compared with the prior art, the utility model discloses technical scheme's beneficial effect is:

(1) the utility model discloses a series dimming circuit establishes ties through the LED lamp to a plurality of colours, connects in parallel at the LED lamp both ends of every colour and adjusts the switch use of light controller as adjusting luminance usefulness, controls through switching on and closing of light controller, can adjust the electric current and the luminance of every LED lamp.

(2) The utility model discloses a series dimming circuit through the whole LED lamp module of a constant current source control of sharing, can effectually simplify the structure of LED lamp module.

Drawings

Fig. 1 is a schematic diagram of a first parallel dimming circuit in the prior art.

Fig. 2 is a schematic diagram of a second parallel dimming circuit in the prior art.

Fig. 3 is a schematic structural diagram of a first series dimming circuit according to the present invention.

Fig. 4 is a schematic structural diagram of a second series dimming circuit according to the present invention.

In the figure, 1 is a power supply access end, 2 is a power supply output end, 3 is a constant current source, 4 is an LED lamp, 5 is a signal receiver, 6 is an MOS tube, and 7 is a control switch.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, so to speak, as communicating between the two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art. The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.

As shown in fig. 1-2, in the existing dimming circuits, all of the existing dimming circuits adopt a parallel structure, the dimming circuit is designed in parallel, a constant current source 3 needs to be arranged on an LED lamp 4 of each color, the constant current source 3 supplies a constant current to the LED lamp 4, and the LED lamp 4 performs brightness adjustment under the control of an MOS transistor 6 or a control switch 7 or performs on-off control under the control of the MOS transistor 6 or the control switch 7.

The utility model discloses a series dimming circuit, which comprises a power supply access end 1, a power supply output end 2, a constant current source 3, a dimming controller and a LED lamp module, wherein the LED lamp module comprises a plurality of LED lamps 4 which are connected in series, one end of the constant current source 3 is connected with the power supply access end 1, the other end is connected with the LED lamp 4 at the head end of the series, and the LED lamp 4 at the tail end of the series is connected with the power supply output end 2; the dimming controllers are respectively connected in parallel at two ends of the corresponding LED lamps 4, the LED lamps 4 with a plurality of colors are connected in series, the dimming controller is connected in parallel at two ends of the LED lamp 4 with each color to be used as a switch for dimming, and the current and the brightness of each LED lamp can be adjusted by controlling the on and off of the dimming controller.

As shown in fig. 3, the dimming controller includes a signal receiver 5, a wire and a MOS transistor 6, a drain of the MOS transistor 6 is connected to an anode of the LED lamp 4 through the wire, a source of the MOS transistor 6 is connected to a cathode of the LED lamp 4 through the wire, a gate of the MOS transistor 6 is connected to the signal receiver 5 through the wire, after the signal receiver 5 receives the signal, the corresponding MOS transistor 6 can be controlled to be turned on and off rapidly, after the MOS transistor 6 is turned on, the current does not flow through the corresponding LED lamp 4 any more, at this time, the corresponding LED lamp 4 is turned off, and after the MOS transistor 6 is turned off, the current flows through the LED lamp 4, and the LED lamp 4 is turned on, so that the MOS transistor 6 can control the LED lamp 4 to be turned on and off according to the signal of.

As shown in FIG. 4, the light-adjusting controller comprises a control switch 7, a wire and a signal receiver 5 connected with the control switch 7, the control switch 7 is connected in parallel with both ends of the LED lamp 4 through the wire, and the purpose of controlling the on-off of the corresponding LED lamp 4 can be achieved by closing and opening the control switch 7, which is also within the protection scope of the present invention, in the present invention, the signal receiver is a PWM pulse signal receiving terminal, in the present invention, after the PWM pulse signal receiving terminal receives the PWM pulse signal, the on-off time and brightness of the MOS tube can be adjusted, and in the present invention, in practical application, the signal receiver can be replaced by other devices, which are all within the protection scope of the present invention, in the present invention, the number of the light-adjusting controller is matched with the number of the LED lamps 4, in practical application, can select to utilize the on-off time and the luminance of a dimming controller control LED lamp, also can be through the on-off time and the luminance of a plurality of LED lamps of a dimming controller simultaneous control, it is all within the utility model discloses a within the protection scope.

When the LED lamp adjusting device is used, the LED lamps with different colors can be arranged in the LED lamp module according to requirements, each LED lamp is electrically independent and can be driven independently, and the LED lamps share one constant current source, so that when the LED lamps need to be adjusted, signals can be transmitted to the MOS tube or the control switch through the PWM pulse signal receiving end, and the purpose of adjusting the brightness and the on-off of the LED lamps by the MOS tube or the control switch is achieved.

In the drawings, the positional relationship is described for illustrative purposes only and is not to be construed as limiting the present patent; it is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A series dimming circuit comprises a power supply access end, a power supply output end, a constant current source, a dimming controller and an LED lamp module, and is characterized in that the power supply access end is connected with the power supply output end;

and the dimming controllers are respectively connected in parallel at two ends of the corresponding LED lamp.

2. The series dimming circuit of claim 1, wherein the dimming controller comprises a signal receiver, a conducting wire and a MOS transistor, wherein a drain electrode of the MOS transistor is connected to an anode of the LED lamp through the conducting wire, a source electrode of the MOS transistor is connected to a cathode of the LED lamp through the conducting wire, and a gate electrode of the MOS transistor is connected to the signal receiver through the conducting wire.

3. The series dimming circuit of claim 1, wherein the dimming controller comprises a control switch, a wire and a signal receiver connected to the control switch, and the control switch is connected in parallel to the two ends of the LED lamp through the wire.

4. The series dimming circuit of claim 2 or 3, wherein the signal receiver is a PWM pulse signal receiving terminal.

5. The series dimming circuit of claim 1, wherein the number of dimming controllers matches the number of LED lamps.