CN218162926U

CN218162926U - LED illumination dimming and color mixing control circuit

Info

Publication number: CN218162926U
Application number: CN202122217370.9U
Authority: CN
Inventors: 李亮友; 陈实; 赵胜求; 张安福
Original assignee: Huizhou Cdn Industrial Development Co ltd
Current assignee: Huizhou Cdn Industrial Development Co ltd
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2022-12-27
Anticipated expiration: 2031-09-13

Abstract

The utility model relates to a technical field that lamps and lanterns adjusted luminance especially relates to a LED illumination is adjusted luminance and is mixed colours control circuit. The LED lamp comprises a direct current power supply, an MOS tube component, a cold color light LED group and a warm color light LED group; the drain electrode of the first MOS tube is connected with the output end of the direct-current power supply, the source electrode of the first MOS tube is connected with the drain electrode of the second MOS tube, and the drain electrode of the second MOS tube is grounded; the drain electrode of the third MOS tube is connected with the output end of the direct-current power supply, the source electrode of the third MOS tube is connected with the drain electrode of the fourth MOS tube, and the drain electrode of the fourth MOS tube is grounded; the input end and the output end of the warm color light LED group are connected in series with a node between the first MOS tube and the second MOS tube and a node between the third MOS tube and the fourth MOS tube; the input end and the output end of the cold color light LED group are connected in series with a node between the third MOS tube and the fourth MOS tube and a node between the first MOS tube and the second MOS tube. The utility model discloses simple structure, it is convenient to adjust, and the reliability is high, and control is stable effective, can reach the high quality mixing of colors dimming function of LED banks with low costs, has increased the market competition of product.

Description

LED illumination dimming and color mixing control circuit

Technical Field

The utility model relates to a technical field that lamps and lanterns adjusted luminance especially relates to a LED illumination is adjusted luminance mixing of colors control circuit.

Background

With the continuous development of LED lighting, LED power sources have also been developed greatly. Especially, with the continuous diversification of lighting requirements, the LED lamp is required to have different brightness in different scenes. Thus, there is a need for an LED power supply that can vary the output power in response to a dimmer, and thus vary the brightness of an LED fixture. The current LED light source usually needs a dedicated dimmer to implement dimming operation, and has a complex structure and high dimming cost.

Disclosure of Invention

The utility model provides a current LED lamp light modulator structure is complicated, and the technical problem with high costs of adjusting luminance provides a LED illumination is adjusted luminance and is mixed colours control circuit.

In order to solve the technical problem, the technical scheme of the utility model as follows:

an LED lighting dimming and color-mixing control circuit comprises a direct-current power supply, an MOS tube assembly, a cold color light LED group and a warm color light LED group; the MOS tube component comprises a first MOS tube, a second MOS tube, a third MOS tube and a fourth MOS tube; the drain electrode of the first MOS tube is connected with the output end of the direct-current power supply, the source electrode of the first MOS tube is connected with the drain electrode of the second MOS tube, and the drain electrode of the second MOS tube is grounded; the drain electrode of the third MOS tube is connected with the output end of the direct-current power supply, the source electrode of the third MOS tube is connected with the drain electrode of the fourth MOS tube, and the drain electrode of the fourth MOS tube is grounded; the input end and the output end of the warm color light LED group are connected in series with a node between the first MOS tube and the second MOS tube and a node between the third MOS tube and the fourth MOS tube; the input end and the output end of the cold color light LED group are connected in series with a node between the third MOS tube and the fourth MOS tube and a node between the first MOS tube and the second MOS tube; the grid electrodes of the first MOS tube and the fourth MOS tube are connected with a first enabling signal end, and the grid electrodes of the second MOS tube and the third MOS tube are connected with a second enabling signal end.

Further, the output signals of the first enable signal terminal and the second enable signal terminal are PWM signals.

Further, the first enable signal terminal and the second enable signal terminal alternately output high-frequency signals.

Furthermore, the first MOS transistor, the second MOS transistor, the third MOS transistor and the fourth MOS transistor are NMOS transistors.

Furthermore, the cold color light LED group comprises at least two LED lamps, and the output ends and the input ends of the two LED lamps are connected in series end to end.

Further, the number of the LED lamps of the cold color light LED group is 3.

Furthermore, the warm color light LED group comprises at least two LED lamps, and the output ends and the input ends of the two LED lamps are connected in series end to end.

Further, the number of the LED lamps of the warm color LED group is 3.

Further, the direct current power supply is a 36V direct current input power supply.

Further, the LED illumination dimming and color-mixing control circuit adjusts color temperature and brightness change by controlling duty ratios of output signals of the first enable signal end and the second enable signal end.

The utility model discloses be provided with four MOS pipes, borrow the alternative on/off that comes control MOS pipe by two control signal, come the high frequency bright of control cold, warm look light LED group to go out, finally reach mixing of colors dimming function, this circuit structure is simple, and it is convenient to adjust, and the reliability is high, and control is stable effective, can reach the high quality of LED banks mixing of colors dimming function with low costs, has increased the market competition of product.

Drawings

Fig. 1 is the embodiment of the utility model provides an in the embodiment circuit structure diagram of LED illumination dimming mixing of colors control circuit.

Wherein:

the number of the MOS tube components is 10, the number of the cold color light LED groups is 20, and the number of the warm color light LED groups is 30.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", and the like, if any, are used in the orientations and positional relationships indicated in the drawings only for the convenience of describing the present application and for simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore the terms describing the positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

Furthermore, if the terms "first," "second," and the like are used for descriptive purposes only, they are used for mainly distinguishing different devices, elements or components (the specific types and configurations may be the same or different), and they are not used for indicating or implying relative importance or quantity among the devices, elements or components, but are not to be construed as indicating or implying relative importance.

The embodiment provides a LED illumination dimming and color mixing control circuit, and the dimming and color mixing control circuit adjusts color temperature and brightness change through the on and off of a high-frequency switching cold and warm LED lamp, so as to achieve the purpose of dimming and color mixing. Specifically, referring to fig. 1, the circuit includes a dc power supply, a MOS tube assembly 10, a cold LED set 20, and a warm LED set 30. The MOS tube assemblies 10 are respectively provided with a first MOS tube, a second MOS tube, a third MOS tube and a fourth MOS tube, in the connection aspect, a drain electrode of the first MOS tube is connected with the output end of the direct-current power supply, a source electrode of the first MOS tube is connected with a drain electrode of the second MOS tube, and a drain electrode of the second MOS tube is grounded; the drain electrode of the third MOS tube is connected with the output end of the direct-current power supply, the source electrode of the third MOS tube is connected with the drain electrode of the fourth MOS tube, and the drain electrode of the fourth MOS tube is grounded. It can be understood that the first MOS transistor and the second MOS transistor form a series circuit, the third MOS transistor and the fourth MOS transistor form a series circuit, and the two series circuits are connected in parallel to the dc power supply, that is, the input terminals of the two series circuits are respectively connected to the output terminal of the dc power supply, and the output terminal of the series circuit is grounded.

In terms of light sources, the cold and warm light LED groups 30 are different in light sources, i.e., different categories of LED lamps, for example, the LED lamps of the cold light LED group 20 adopt cold light lamps, the LED lamps of the warm light LED group 30 adopt warm light lamps, in this embodiment, the LED lamps of the cold light LED group 20 adopt white light, and the LED lamps of the warm light LED group 30 adopt yellow light. In connection, the input end and the output end of the warm color light LED group 30 are connected in series to a node between the first MOS transistor and the second MOS transistor and a node between the third MOS transistor and the fourth MOS transistor. The input end and the output end of the cold color light LED group 20 are connected in series to a node between the third MOS transistor and the fourth MOS transistor and a node between the first MOS transistor and the second MOS transistor. Through the connection mode, the two groups of LED groups can be controlled to be alternately turned on and off through the on and off of the four MOS tubes, and finally the color temperature and the brightness of the lamp group are adjusted.

In a specific control aspect, the gates of the first MOS transistor and the fourth MOS transistor are connected to the first enable signal terminal, and the gates of the second MOS transistor and the third MOS transistor are connected to the second enable signal terminal. The signals output by the first enable signal terminal and the second enable signal terminal are high frequency PWM (Pulse width modulation) signals, and the two enable signal terminals output high levels alternately one after another. The control circuit controls the cold color light LED group 20 and the warm color light LED group 30 to be sequentially turned on and off at high frequency by adjusting output signals of the two enable signal ends, and the color temperature and the brightness of the lamp group are adjusted. Specifically, the LED illumination dimming and color-mixing control circuit adjusts color temperature and brightness change by controlling duty ratios of output signals of a first enabling signal end and a second enabling signal end. For example, at time t1, the first enable signal terminal is at a high level, the second enable signal terminal is at a low level, the first MOS transistor and the fourth MOS transistor are turned on, the circuit loop is the dc power supply-the first MOS transistor-the warm color LED set 30-the fourth MOS transistor-is grounded, and at this time, the warm color LED set 30 is in a lighting state, and although a current passes through the cool color LED set 20, the current is in a reverse direction, the cool color LED set 20 is in a lighting state. Similarly, when the second enable signal terminal is at a high level, the first enable signal terminal is at a low level, the cold color LED set 20 is turned on, and the warm color LED set 30 is turned off.

In a specific circuit configuration, please refer to fig. 1, in some embodiments, the first MOS transistor, the second MOS transistor, the third MOS transistor, and the fourth MOS transistor are NMOS transistors. In terms of lamp source, the cold color light LED group 20 includes at least two LED lamps, and output ends and input ends of the two LED lamps are connected in series end to end. In the present embodiment, the number of LED lamps in the cold color LED group 20 is preferably 3. Similarly, the warm color light LED group 30 includes at least two LED lamps, and the output ends and the input ends of the two LED lamps are connected end to end in series. The number of LED lamps in the warm color LED group 30 is preferably 3. In the aspect of power supply, the direct current power supply is 36V direct current input power supply, and the cold color light LED group 20 and the warm color light LED group 30 are respectively connected in series to form a 36V LED lamp group.

For better operation experience and providing specific implementation and operation description, please refer to fig. 1, a and B, which represent control signals of two gates of the MOS transistors, i.e. output signals of a first enable signal terminal and a second enable signal terminal, and control the first MOS transistor Q1 and the fourth MOS transistor Q4, and the second MOS transistor Q2 and the third MOS transistor Q3 to turn on and off by using the two control signals, wherein the first MOS transistor Q1 and the second MOS transistor Q2 cannot be turned on simultaneously, and the third MOS transistor Q3 and the fourth MOS transistor Q4 cannot be turned on simultaneously, so that a and B cannot be turned on at high level simultaneously.

Due to the characteristic of visual persistence of human eyes, when A and B are high-frequency PWM signals, the cold color light LED and the warm color light LED are controlled to be alternately on and off at high frequency, and then the lamplight with different brightness and different color temperatures can be obtained.

Specifically, when A is high level, the first MOS tube Q1 and the fourth MOS tube Q4 are controlled to be conducted, current passes through the first MOS tube Q1-warm color light LED lamps D4, D5 and D6-the fourth MOS tube Q4 from 36VDC to GND, and then the warm color light LED is controlled to be on, and when A is low level, the first MOS tube Q1 and the fourth MOS tube Q4 are switched off, and the warm color light LED is turned off.

And when B is a high level, the second MOS tube Q2 and the third MOS tube Q3 are controlled to be switched on, the current passes through the third MOS tube Q3-cold color LED lamp D1, D2 and D3-the second MOS tube Q2 to GND from 36VDC, and then the cold color LED is controlled to be on, and when B is a low level, the second MOS tube Q2 and the third MOS tube Q3 are switched off, and the cold color LED is switched off.

Finally, the control circuit controls and adjusts the on-off time of the warm color light LED and the cold color light LED by controlling the duty ratio of the signals A and B so as to adjust the color temperature and the brightness change and achieve the purpose of dimming and color mixing.

The benefit of this embodiment lies in, this control circuit is provided with four MOS pipes, borrows the alternative switch-on/switch-off that comes control MOS pipe by two control signal, controls the high frequency bright of cold, warm look light LED group and goes out, finally reaches mixing of colors dimming function, and this circuit structure is simple, adjusts conveniently, and the reliability is high, and control is stable effective, can reach the high quality mixing of colors dimming function of LED banks with low costs, has increased the market competition of product.

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. An LED lighting dimming and color-mixing control circuit is characterized by comprising a direct-current power supply, an MOS tube component (10), a cold color light LED group (20) and a warm color light LED group (30); the MOS tube component (10) comprises a first MOS tube, a second MOS tube, a third MOS tube and a fourth MOS tube; the drain electrode of the first MOS tube is connected with the output end of the direct-current power supply, the source electrode of the first MOS tube is connected with the drain electrode of the second MOS tube, and the drain electrode of the second MOS tube is grounded; the drain electrode of the third MOS tube is connected with the output end of the direct-current power supply, the source electrode of the third MOS tube is connected with the drain electrode of the fourth MOS tube, and the drain electrode of the fourth MOS tube is grounded; the input end and the output end of the warm color light LED group (30) are connected in series with a node between the first MOS tube and the second MOS tube and a node between the third MOS tube and the fourth MOS tube; the input end and the output end of the cold color light LED group (20) are connected in series with a node between the third MOS tube and the fourth MOS tube and a node between the first MOS tube and the second MOS tube; the grid electrodes of the first MOS tube and the fourth MOS tube are connected with a first enabling signal end, and the grid electrodes of the second MOS tube and the third MOS tube are connected with a second enabling signal end.

2. The LED lighting dimming and color-adjusting control circuit of claim 1, wherein the output signals of the first and second enable signal terminals are PWM signals.

3. The LED lighting dimming and color-adjusting control circuit of claim 2, wherein the first and second enable signal terminals alternately output high-level signals at high frequency.

4. The LED illumination dimming and color-mixing control circuit according to claim 1, wherein the first MOS transistor, the second MOS transistor, the third MOS transistor and the fourth MOS transistor are NMOS transistors.

5. The LED lighting dimming and color-mixing control circuit according to claim 1, wherein the cold color LED group (20) comprises at least two LED lamps, and the output ends and the input ends of the two LED lamps are connected end to end.

6. The LED lighting dimming and toning control circuit according to claim 5, wherein the number of the LED lamps of the cold color LED group (20) is 3.

7. The LED lighting dimming and color-mixing control circuit according to claim 1, wherein the warm color LED group (30) comprises at least two LED lamps, and the output ends and the input ends of the two LED lamps are connected in series end to end.

8. LED lighting dimming and toning control circuit according to claim 7, characterized in that the number of LED lamps of the warm-color LED group (30) is 3.

9. The LED lighting dimming and color adjusting control circuit of claim 1, wherein the DC power supply is a 36V DC input power supply.

10. The LED lighting dimming and color-adjusting control circuit of claim 1, wherein the LED lighting dimming and color-adjusting control circuit adjusts color temperature and brightness variation by controlling duty ratios of output signals of the first and second enable signal terminals.