阅读说明：本技术 一种led柔光混合控制电路及其方法 (LED soft light hybrid control circuit and method thereof ) 是由 曾文忠 于 2019-09-12 设计创作，主要内容包括：本发明公开了一种LED柔光混合控制电路及其方法,所述电路包括：主控模块,用于在遥控指令或开关指令的触发下控制系统工作,产生第一/第二控制信号至第一/第二延时电路；第一延时电路,用于在所述第一控制信号的控制下产生延迟T1的第一PWM脉宽调制信号；第二延时电路,用于在第二控制信号的控制下产生延迟T2的第二PWM脉宽调制信号；第一恒流驱动电路,连接第一光源,用于在所述第一PWM脉宽调制信号的控制下使所述第一光源按指令产生依次增强或减弱的可见光；第二恒流驱动电路,连接第二光源,用于在所述第二PWM脉宽调制信号的控制下使所述第二光源按指令产生依次增强或减弱的可见光；遥控接收模块,用于接收遥控器发出的无线指令并完成应答。(The invention discloses a LED soft light hybrid control circuit and a method thereof, wherein the circuit comprises: the main control module is used for controlling the system to work under the triggering of a remote control instruction or a switch instruction and generating a first/second control signal to the first/second delay circuit; a first delay circuit for generating a first PWM pulse width modulated signal delayed by T1 under control of the first control signal; a second delay circuit for generating a second PWM pulse width modulated signal delayed by T2 under the control of a second control signal; the first constant current driving circuit is connected with the first light source and is used for enabling the first light source to generate sequentially enhanced or weakened visible light according to an instruction under the control of the first PWM pulse width modulation signal; the second constant current driving circuit is connected with the second light source and is used for enabling the second light source to generate sequentially enhanced or weakened visible light according to an instruction under the control of the second PWM pulse width modulation signal; and the remote control receiving module is used for receiving the wireless command sent by the remote controller and completing response.)

1. An LED soft light hybrid control circuit comprising:

the main control module is used for controlling the system to work under the triggering of a remote control instruction or a switch instruction and generating a first/second control signal to the first/second delay circuit;

a first delay circuit for generating a first PWM pulse width modulated signal delayed by T1 under control of the first control signal;

a second delay circuit for generating a second PWM pulse width modulated signal delayed by T2 under the control of a second control signal;

the first constant current driving circuit is connected with the first light source and is used for enabling the first light source to generate sequentially enhanced or weakened visible light according to an instruction under the control of the first PWM pulse width modulation signal;

the second constant current driving circuit is connected with the second light source and is used for enabling the second light source to generate sequentially enhanced or weakened visible light according to an instruction under the control of the second PWM pulse width modulation signal;

and the remote control receiving module is used for receiving the wireless command sent by the remote controller and completing response.

2. The LED soft mixing control circuit of claim 1, wherein: the circuit further comprises a light sensor connected to the main control module and used for adjusting the delay time according to the light intensity signal sensed by the light sensor.

3. The LED soft mixing control circuit of claim 1, wherein: the first light source adopts a warm white COB light source.

4. The LED soft mixing control circuit of claim 1, wherein: the second light source adopts an amber LED light source.

5. An LED soft light mixing control method comprises the following steps:

step S1, when receiving the remote control command or the switch command, the main control module generates the corresponding first/second control signal to the first/second delay circuit to control the generation of the first PWM signal delayed by T1/the second PWM signal delayed by T2;

and step S2, the first/second constant current driving circuit drives the first/second light source to generate sequentially enhanced or attenuated visible light respectively for light effect mixing under the control of the first/second PWM pulse width modulation signal PWM1/PWM2, respectively.

6. The LED soft light mixing control method of claim 5, wherein: the main control module also acquires light intensity signals of the light sensors in real time so as to adjust the delay time according to the light intensity signals sensed by the light sensors.

7. The LED soft light mixing control method of claim 5, wherein: the first light source adopts a warm white COB light source.

8. The LED soft light mixing control method of claim 5, wherein: the second light source adopts an amber LED light source.

Technical Field

The invention relates to the technical field of optics, in particular to an LED soft light hybrid control circuit and a method thereof.

Background

With the development of semiconductor technology, LEDs are increasingly widely used as semiconductor solid-state light sources, and gradually replace traditional gaseous light sources in many fields. Solid-state semiconductor is luminous as novel light source, and it has the energy consumption low, and luminous efficiency is high, and light source colour is abundant, and factor of safety is high, and is longe-lived, advantages such as green also get into the illumination field of some specialty gradually, trades such as medical illumination, stage lighting.

With the increasing demand, LED applications have also evolved from simple low power indicator lighting to high power and even ultra high power (kw) specialty lighting assemblies. In many special lighting fields, such as stage lighting industry, not only simple white light or lighting requirements of a certain color are given, but also a stage scene needs to be rendered by continuously changing the color and the light quality of light in the using process so as to express stage emotion.

Because the LED is a point light source, if the LED does not perform good secondary light distribution, spot dazzling light spots, namely glare, can be generated. Glare refers to the visual condition where there is extreme contrast in brightness in space or time due to unfavorable brightness distribution in the field of view, causing visual discomfort and reducing the visibility of objects. The visual field produces a sensation of brightness that the human eye cannot accommodate, possibly causing aversion, discomfort or even loss of visibility. It is necessary to provide a technical means to solve the above problems of the LED light source lighting system, because the phenomenon of excessive brightness at a local place in the visual field or excessive brightness change before and after the local place, and glare is one of the important causes of visual fatigue, which is not acceptable in the lighting fixture.

Disclosure of Invention

In order to overcome the defects of the prior art, the present invention provides an LED soft light hybrid control circuit and a method thereof, so as to achieve an LED soft light hybrid control circuit with uniform and simple color mixing, low cost and reduced harm to human eyes.

To achieve the above object, the present invention provides an LED soft light hybrid control circuit, which includes:

the main control module is used for controlling the system to work under the triggering of a remote control instruction or a switch instruction and generating a first/second control signal to the first/second delay circuit;

a first delay circuit for generating a first PWM pulse width modulated signal delayed by T1 under control of the first control signal;

a second delay circuit for generating a second PWM pulse width modulated signal delayed by T2 under the control of a second control signal;

the first constant current driving circuit is connected with the first light source and is used for enabling the first light source to generate sequentially enhanced or weakened visible light according to an instruction under the control of the first PWM pulse width modulation signal;

the second constant current driving circuit is connected with the second light source and is used for enabling the second light source to generate sequentially enhanced or weakened visible light according to an instruction under the control of the second PWM pulse width modulation signal;

and the remote control receiving module is used for receiving the wireless command sent by the remote controller and completing response.

Preferably, the circuit further comprises a light sensor connected to the main control module for adjusting the delay time according to the light intensity signal sensed by the light sensor.

Preferably, the first light source is a warm white COB light source.

Preferably, the second light source is an amber LED light source.

In order to achieve the above object, the present invention further provides a method for controlling mixing of soft lights of LEDs, comprising the following steps:

step S1, when receiving the remote control command or the switch command, the main control module generates the corresponding first/second control signal to the first/second delay circuit to control the generation of the first PWM signal delayed by T1/the second PWM signal delayed by T2;

and step S2, the first/second constant current driving circuit drives the first/second light source to generate sequentially enhanced or attenuated visible light respectively for light effect mixing under the control of the first/second PWM pulse width modulation signal PWM1/PWM2, respectively.

Preferably, the main control module further obtains a light intensity signal of the light sensor in real time, so as to adjust the delay time according to the light intensity signal sensed by the light sensor.

Preferably, the first light source is a warm white COB light source.

Preferably, the second light source is an amber LED light source.

Compared with the prior art, the LED soft light hybrid control circuit and the method thereof generate a first/second control signal to a first/second delay circuit by utilizing a main control module to generate a first/second PWM pulse width modulation signal delaying T1/T2, a first constant current driving circuit is utilized to enable a first light source to generate visible light which is sequentially enhanced or weakened according to an instruction under the control of the first PWM pulse width modulation signal, and a second constant current driving circuit is utilized to enable a second light source to generate the visible light which is sequentially enhanced or weakened according to the instruction under the control of the second PWM pulse width modulation signal, so that the light of the two light sources is subjected to light effect mixing, and the LED soft light hybrid control circuit which is uniform in color mixing, simple, low in cost and capable of reducing harm to human eyes is realized.

Drawings

FIG. 1 is a schematic diagram of an LED optical hybrid system according to the present invention;

FIG. 2 is a schematic structural diagram of an LED soft light hybrid control circuit according to the present invention;

FIG. 3 is a schematic diagram of dimming curves for a warm white COB light source and an amber LED light source;

fig. 4 is a flowchart illustrating steps of an LED soft light mixing control method according to the present invention.

Detailed Description

Other advantages and capabilities of the present invention will be readily apparent to those skilled in the art from the present disclosure by describing the embodiments of the present invention with specific embodiments thereof in conjunction with the accompanying drawings. The invention is capable of other and different embodiments and its several details are capable of modification in various other respects, all without departing from the spirit and scope of the present invention.

FIG. 1 is a schematic diagram of an LED optical hybrid system according to the present invention. As shown in fig. 1, the LED optical hybrid system includes a substrate 10 and a first light source 20 disposed on the substrate 10, in the embodiment of the invention, the first light source 20 is a warm-white COB (Chip on Board) light source, the COB light source is a high light efficiency integrated surface light source technology in which an LED Chip is directly attached to a mirror metal substrate with high light reflection rate, which can be simply understood as a high power integrated surface light source, the light output area and the external dimensions of the light source can be designed according to the external structure of the product, the first light source 20 is generally disposed in the middle of the substrate 10, second light sources 30 are uniformly distributed around the first light source 20, the second light sources 30 are amber LEDs, a refraction and condensation device 40 is disposed above the light emitting surface of the first light source 20 to refract and condense the light emitted from the first light source 20 and the second light sources 30 for multiple times, in the embodiment of the present invention, the refraction and condensation device 40 employs a reverse fresnel lens having a threaded surface, and is disposed about 5mm above the light emitting surface of the first light source 20, the light emitting angle of the warm white COB light source of the first light source 20 and the amber LED light source of the second light source 30 is 120 °, and the light is condensed by multiple refractions through the threaded surface of the reverse fresnel lens, and the reverse fresnel lens is disposed 5mm away from the light emitting surface of the LED of the first light source, so that the optical path is shortened, the light loss is reduced, and the optical angle of the light is changed after passing through the reverse fresnel lens, thereby improving the optical efficiency and the central light intensity.

Fig. 2 is a schematic structural diagram of an LED soft light hybrid control circuit according to the present invention. As shown in fig. 2, the LED soft light hybrid control circuit of the present invention includes: the remote control circuit comprises a main control module 10, a first delay circuit 20, a second delay circuit 30, a first constant current driving circuit 40, a second constant current driving circuit 50 and a remote control receiving module 60.

The main control module 10 is a main microprocessor and a peripheral circuit thereof, and is configured to control the system to operate under the trigger of a remote control instruction or a switch instruction, and generate a first/second control signal to the first delay circuit 20 and the second delay circuit 30; the first delay circuit 20 is composed of a first slave microprocessor and its peripheral circuits, and is used for generating a first PWM pulse width modulation signal PWM1 with a delay T1 under the control of a first control signal; the second delay circuit 30 is composed of a second slave microprocessor and its peripheral circuits, and is used for generating a second PWM pulse width modulation signal PWM2 with a delay T2 under the control of a second control signal; the first constant current driving circuit 40 is connected to a first light source, namely a warm white COB light source, and is configured to enable the COB-packaged white LED light emitting diode lamp to generate sequentially enhanced or reduced white visible light according to an instruction under the control of the first PWM pulse width modulation signal PWM1, and the second constant current driving circuit 50 is connected to a second light source, namely a plurality of amber LED light sources, and is configured to enable the plurality of amber LED lights to generate sequentially enhanced or reduced amber visible light according to an instruction under the control of the second PWM pulse width modulation signal PWM 2; the remote control receiving module 60 is an ism (industrial Scientific medical) wireless module or a 2G/3G/4G/5G communication module, and is configured to receive a wireless command sent by a remote controller and complete a response. In the present invention, the time for the light to gradually change from dark to light is defined as a time delay, which is different from a simple digital circuit time delay, which is an analog quantity change process.

The main control module 10 is connected to the remote control receiving module 60 through a communication port, a first control signal output by the main control module 10 is connected to an input end of the first delay circuit 20, a first PWM pulse width modulation signal PWM1 output by the first delay circuit 20 is connected to a pulse width modulation input end of the first constant current driving circuit 40, a second control signal output by the main control module 10 is connected to an input end of the second delay circuit 30, and a second PWM pulse width modulation signal PWM2 output by the second delay circuit 30 is connected to a pulse width modulation input end of the second constant current driving circuit 50.

Preferably, the LED soft light hybrid control circuit of the present invention further includes a light sensor for sensing an external light intensity signal, so that the main control module 10 adjusts the delay time according to the light intensity signal sensed by the light sensor.

The working principle of the invention is as follows: when receiving a remote control on command or a switch on command, the main control module 10 may generate a first control signal/a second control signal to the first delay circuit 20 and the second delay circuit 30 according to a light intensity signal detected by the light sensor, generate a first PWM pulse width modulation signal PWM1 with a delay of T1 through the first delay circuit 20, generate a second PWM pulse width modulation signal PWM2 with a delay of T2 through the second delay circuit 30, in a specific embodiment of the present invention, T1 and T2 may be made 5s, generate the second PWM pulse width modulation signal PWM2 to control the second constant current driving circuit to drive the second light source, generate the first PWM pulse width modulation signal 1 to control the first constant current driving circuit to drive the first light source, so that the light line is from weak to strong when the corresponding light source is turned on, thereby protecting human eyes, and when the light is turned off, according to the dimming curve diagram of the warm white COB light source and the amber LED light source shown in fig. 3, with the increase of the DMX value, the output light intensity of the warm white COB and the amber gradually increases according to the same linear rule, and with the decrease of the DMX value, the warm white COB is turned off faster than the amber LED, so that the white light is transited to the amber when the light is turned off, and the light turning-off process is more comfortable and softer.

Fig. 4 is a flowchart illustrating steps of an LED soft light mixing control method according to the present invention. As shown in fig. 4, the method for controlling mixing of soft light of an LED of the present invention includes the following steps:

in step S1, when receiving the remote control command or the switch command, the main control module generates the corresponding first/second control signals to the first/second delay circuit to control the generation of the first PWM pulse width modulation signal PWM1 delayed by T1/the second PWM pulse width modulation signal PWM2 delayed by T2.

And step S2, the first/second constant current driving circuit drives the first/second light source to generate sequentially enhanced or attenuated visible light respectively for light effect mixing under the control of the first/second PWM pulse width modulation signal PWM1/PWM2, respectively.

In a specific embodiment of the present invention, the main control module further obtains a light intensity signal of the light sensor in real time, so as to adjust a delay amount of the delay time according to the light intensity signal sensed by the light sensor.

In summary, the LED soft light hybrid control circuit and the method thereof of the present invention generate the first/second control signal to the first/second delay circuit by using the main control module to generate the first/second PWM pulse width modulation signal with the delay T1/T2, the first constant current driving circuit is used to enable the first light source to generate the visible light which is sequentially enhanced or weakened according to the instruction under the control of the first PWM pulse width modulation signal, and the second constant current driving circuit is used to enable the second light source to generate the visible light which is sequentially enhanced or weakened according to the instruction under the control of the second PWM pulse width modulation signal, so that the lights of the two light sources are optically mixed, thereby implementing an LED soft light hybrid control circuit which has uniform, simple, low cost and reduced harm to human eyes.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, the scope of the invention should be determined from the following claims.