CN103068092A - Automatic dimming power supply - Google Patents

Abstract

The invention discloses an automatic dimming power supply which is connected between alternating current and a light-emitting diode lamp string to drive the light-emitting diode lamp string to emit light. The automatic dimming power supply comprises: a sensing light modulation and setting unit and a digital power supply regulation and control unit. Wherein, the sensing light modulation and setting unit can sense an infrared signal and generate various brightness selection signals. An AC/DC conversion circuit is arranged in the digital power supply regulation and control unit to convert AC into DC power for output. The digital power supply regulating and controlling unit is connected with the sensing dimming and setting unit and adjusts the power output of the sensing dimming and setting unit according to the infrared signal and the brightness selection signal of the sensing dimming and setting unit, so that the brightness of the LED lamp string is changed. By using the power supply with automatic dimming, a user can directly use alternating current mains supply to achieve the effect of sectional dimming without additionally arranging a power conversion device, and meanwhile, the energy consumption is saved.

Description

Auto-dimming power supplies

technical field

The invention relates to an automatic light-adjusting power supply, in particular to a light-emitting diode power supply which is directly connected to an AC mains to control light-emitting diode strings to generate various illuminances.

Background technique

With the improvement of the quality of life, the design of the home environment is constantly innovating. In order to match the overall aesthetic feeling of the space, the lighting design has attracted much attention. With the advantages of energy saving, low failure rate, stable light, high luminous efficiency, and high compatibility with various lamps, it has become a mainstream commodity in the market.

In general light-emitting diode lamps, it mainly includes a small light-emitting diode (Lightemitting diode, LED) lamp tube and a power supply, so that the power provided by the power supply inside is converted into direct current to drive the above-mentioned LED lights Tube. This kind of design makes the light-emitting diode lamps only have two types of lighting and non-lighting according to the presence or absence of the power supply, unlike traditional tungsten filament bulbs that can have different levels of luminous levels as the power supply changes. Therefore, the existing light-emitting diode lamps cannot fully meet the needs of users to adjust the lighting at any time in different areas or at different times to create an overall atmosphere for people who generally value life quality and energy-saving issues. In addition, LED lamps that only have two types of lighting and non-lighting are likely to cause problems such as energy consumption or limited application, which is not only impractical for most stores and houses that focus on sentimentality, but also Convenience does not meet the needs of modern people for energy saving and carbon reduction.

In addition, the existing LED lamps can only receive DC power to supply their power source, so as to emit light under DC drive. In general home environments or business stores where AC power is mostly used, the front end of the existing LED lamps must be connected in series with an LED power supply for power conversion. As a result, the application of LED lamps is not only limited, but also increases its production cost virtually. If people familiar with this technical field can propose an LED power supply that can adjust the luminance at any time, it will be able to effectively solve the problems caused by the conventional knowledge and promote the development of the industry.

Contents of the invention

The main purpose of the present invention is to provide an automatic dimming power supply, which is connected between an AC mains and a LED lamp string, so as to directly use the AC power to drive the LED lamp string to emit light, and simultaneously The infrared signal in the environment adjusts its power output, thereby changing the brightness of the LED light string.

Another object of the present invention is to provide an automatic dimming power supply, which has the advantage of dimming according to the infrared signal in the environment and the ambient brightness, so as to save energy.

Yet another object of the present invention is to provide an automatic dimming power supply, which achieves the effect of group regulation through at least one sensor and/or at least one digital power regulation unit.

To achieve the above purpose, the present invention relates to an automatic dimming power supply, which is connected between an alternating current and an LED lamp string to drive the LED lamp string to emit light. The automatic dimming power supply includes: a perceptual dimming and its setting unit and a digital power regulating unit. Wherein, the sensory dimming and its setting unit can sense an infrared signal and generate multiple brightness selection signals. An AC/DC conversion circuit is arranged inside the digital power regulation unit to convert the aforementioned AC power into a DC power output. The digital power control unit is connected with the sensing dimming and its setting unit, and adjusts its power output according to the infrared signal and the brightness selection signal of the sensing dimming and its setting unit, thereby changing the luminance of the LED light string.

According to an embodiment of the present invention, the above-mentioned digital power regulation unit further includes a low-voltage power supply circuit connected to the AC/DC conversion circuit, a power output control signal processing unit connected to the perceptual dimming and its setting unit, a connection In the power output conversion and filtering circuit of the LED light string and a power output control unit, wherein: the AC/DC conversion circuit is connected between the power output control unit, the low-voltage power supply circuit and the AC power, and the power output control unit is connected to the AC/DC Between the DC conversion circuit, the power output conversion and filter circuit and the power output control signal processing unit.

Wherein, the AC/DC conversion circuit includes an electromagnetic interference filter circuit, a rectification circuit and a power factor adjustment circuit, wherein: the electromagnetic interference filter circuit is connected to the alternating current, the power factor adjustment circuit is connected to the power output control unit, and the rectification circuit is connected to the electromagnetic interference Between the filter circuit and the power factor adjustment circuit.

Therefore, the effect that the present invention can achieve is that the automatic dimming power supply disclosed in the present invention is a kind of LED light string dimming control that can directly use AC mains power, and can simultaneously sense the environment An infrared signal in a smart device that adjusts its power output. Through the above-mentioned components, the present invention can directly and effectively use the AC mains to achieve segmental dimming, energy saving, and group regulation without relying on expensive sensing instruments and/or additional power conversion devices effect.

Below, detailed descriptions will be given through specific embodiments in conjunction with the accompanying drawings, so that it will be easier to understand the purpose, technical content, features and effects of the present invention.

Description of drawings

FIG. 1 is a schematic diagram of an automatic dimming power supply device according to an embodiment of the present invention;

2 is an internal schematic diagram of a digital power regulation unit according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an apparatus for an automatic dimming power supply with multi-sensory input according to an embodiment of the present invention;

4 is an internal schematic diagram of an automatic dimming power supply according to an embodiment of the present invention;

5A is a schematic diagram of a signal amplifying unit and a dimmer integrated in the same dimming module or the same chip according to an embodiment of the present invention;

5B is a schematic diagram of a signal amplifying unit and an infrared sensor integrated in the same dimming module or the same chip according to an embodiment of the present invention;

6 is an internal schematic diagram of a power supply with automatic dimming of a power supply unit according to another embodiment of the present invention;

7 is an internal schematic diagram of an auto-dimming power supply with a photoresistor sensor according to another embodiment of the present invention;

8 is an internal schematic diagram of an automatic dimming power supply integrated into a single system chip according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of an automatic dimming power supply with group control according to an embodiment of the present invention;

FIG. 10 is a device schematic diagram of an auto-dimming power supply with external electronic devices according to an embodiment of the present invention.

Explanation of reference signs: 1-automatic dimming power supply; 2-AC power; 3-light-emitting diode string; 4-external DC power supply; 10-perceptual dimming and its setting unit; 10'-dimming module Integrated chip; 20-digital power control unit; 22-AC/DC conversion circuit; 30-external electronic device; 102-infrared sensor; 104-dimmer; 106-signal processing unit; 108-signal detection unit; 110-digital control signal output unit; 112-dimming setting unit; 114-brightness selection switch; 116-delay time adjustment switch; 118-signal amplification unit; 120-power supply unit; 122-photoresistor sensor; 201- Electromagnetic interference filter circuit; 202-rectification circuit; 203-power factor adjustment circuit; 204-power output control unit; 205-power output conversion and filter circuit; 206-low voltage power supply circuit; 207-power output control signal processing unit; 208 - detection signal conversion circuit; 209 - overcurrent detection circuit; 210 - overvoltage detection circuit.

Detailed ways

The invention provides an automatic dimming power supply, which directly receives AC mains as the power source of the LED lamp string, and thereby controls the luminance of the LED lamp string.

This kind of automatic dimming power supply can perform dimming according to the infrared signal in the environment and the ambient brightness, so as to further achieve the effect of saving energy.

Please refer to FIG. 1 , which is a schematic diagram of an automatic dimming power supply according to an embodiment of the present invention. This automatic dimming power supply 1 is connected to an alternating current (AC) 2 and an LED light string ( between the LED string) 3 to drive the light emitting diode string 3 to emit light.

According to an embodiment of the present invention, the automatic dimming power supply 1 includes a perceptual dimming and its setting unit 10 and a digital power regulation unit 20, wherein the perceptual dimming and its setting unit 10 is equipped with an infrared sensor A device 102 and a dimmer 104 are used to sense infrared signals and generate more than one brightness selection signal. The digital power control unit 20 is connected to the perceptual dimming and its setting unit 10, thereby adjusting its power output according to the infrared signal and the brightness selection signal of the perceptual dimming and its setting unit 10, so as to change the light emission of the LED light string 3 brightness.

An AC/DC conversion circuit 22 (as shown in FIG. 2 ) is provided inside the digital power control unit 20 to convert the AC 2 into a DC power for driving the LED light string 3 . Thus, the automatic dimming power supply 1 disclosed in the present invention can receive AC mains power and drive the LED lamp string 3 to emit light.

Please refer to FIG. 2 , which is an internal diagram of the digital power regulation unit 20 according to an embodiment of the present invention. As shown in Figure 2, the digital power regulation unit 20 includes an AC/DC conversion circuit 22, a power output control unit 204, a power output conversion and filter circuit 205, a low voltage power supply circuit 206, a power output digital control signal processing Unit 207 , a detection signal conversion circuit 208 , an over-current detection circuit 209 and an over-voltage detection circuit 210 .

Wherein, the AC/DC conversion circuit 22 includes an electromagnetic interference filter circuit 201 , a rectification circuit 202 and a power factor adjustment circuit 203 . The electromagnetic interference filter circuit 201 is connected to the AC 2 to filter out higher frequency noise in the mains. The power factor adjustment circuit 203 is connected to the power output control unit 204 , and the rectification circuit 202 is connected between the electromagnetic interference filter circuit 201 and the power factor adjustment circuit 203 . Thus, the digital power control unit 20 disclosed in the present invention uses the AC/DC conversion circuit 22 to convert the AC power 2 into DC power for driving the LED light string 3 .

Furthermore, according to the embodiment of the present invention, the low-voltage power supply circuit 206 is connected between the electromagnetic interference filter circuit 201 , the power output control signal processing unit 207 , and the perceptual dimming and setting unit 10 . The power output control signal processing unit 207 is connected to the perceptual dimming and setting unit 10, the power output conversion and filter circuit 205 is connected to the LED light string 3, the power output control unit 204 is connected to the power factor adjustment circuit 203, and the power output control signal processing Between the unit 207 and the power output converting and filtering circuit 205 .

The detection signal conversion circuit 208 is connected to the power output control signal processing unit 207, the overcurrent detection circuit 209 and the overvoltage detection circuit 210 are connected in parallel, and are respectively connected to the detection signal conversion circuit 208, the power output conversion and filter circuit 205 and the Between the LED light strings 3.

Thus, the digital power control unit 20 can adjust its power output according to the infrared signal sensed by the perceptual dimming and setting unit 10 and various brightness selection signals preset by the user, so as to change the brightness of the light emitting diode string 3 . Luminous brightness.

Wherein, it should be noted that the present invention is not limited to the perceptual dimming and its setting unit 10 including a single infrared sensor 102 . In other words, as shown in FIG. 3 , the perceptual dimming and its setting unit 10 disclosed in the present invention may also include a plurality of infrared sensors 102 as the input control of the multi-sensory system. Only the following is to explain the technical idea of the present invention, taking the embodiment of Figure 1 as a better example, but those who are familiar with this technical field can apply the technology disclosed in the present invention to the multi-sensory sensor shown in Figure 3 Input should also belong to the scope of the invention of the present invention.

Please refer to FIG. 4 , which is an internal schematic diagram of an auto-dimming power supply according to an embodiment of the present invention. As shown in FIG. 4 , the dimmer 104 includes a signal processing unit 106 , a signal detection unit 108 , a digital control signal output unit 110 and a dimming setting unit 112 . The signal detection unit 108 , the digital control signal output unit 110 and the dimming setting unit 112 are respectively connected to the signal processing unit 106 . The dimming setting unit 112 includes a brightness selection switch 114 and a delay time adjustment switch 116 .

According to an embodiment of the present invention, the brightness selection switch 114 can generate more than one brightness selection signal through user settings. The delay time adjustment switch 116 can similarly be set by the user to generate different delay times corresponding to different brightness of the lamp.

The infrared sensor 102 is connected to the signal detection unit 108, so that when the dimming setting unit 112 generates one or more than one brightness selection signals through the setting of the user, and each brightness selection signal corresponds to When the delay time is also set through the delay time adjustment switch 116, the signal processing unit 106 can judge the dimming to be sent according to the sensing result of the infrared sensor 102 and the setting of the dimming setting unit 112. The energy is output to the digital power regulation unit 20 through the output of the digital control signal output unit 110 . In the present invention, the output digital signal of the digital control signal output unit 110 is used to control the output electric energy of the digital power regulation unit 20 to adjust the luminance of the LED light string 3 .

For example, the user can preset the brightness selection signal to be 100%, 75%, and 50% (that is, the brightness of the LED light string 3 is 100%, 75%, and 50%). And when the brightness selection signal is 100%, its corresponding delay time is 1 minute; when the brightness selection signal is 75%, its corresponding delay time is 1.5 minutes; when the brightness selection signal is 50%, its corresponding delay time The time is 0.5 minutes. Therefore, when the infrared sensor 102 detects that there is a person passing by within its sensing range, the infrared sensor 102 can notify the digital power control unit 20 to output the maximum power, that is, 100% power to the LED light string 3 illumination.

Afterwards, if the infrared sensor 102 detects that the person leaves, the LED light string 3 will continue to illuminate with a delay time of 1 minute, and will automatically reduce to 75% after 1 minute. Then, illuminate with 75% lighting intensity for another 1.5 minutes, and then automatically adjust to 50% after 1.5 minutes. Finally, illuminate with 50% lighting brightness for 0.5 minutes, and automatically turn off after 0.5 minutes to achieve the effect of segmented dimming.

Furthermore, in order to amplify the infrared signal of the infrared sensor 102 to obtain better sensing accuracy, the perceptual dimming and setting unit 10 disclosed in the present invention may further include a signal detection unit 108 connected Signal amplifying unit 118. Wherein, the signal amplifying unit 118 can optionally be integrated with the dimmer 104 on the same dimming module or on the same chip as shown in FIG. 5A, or integrated with the infrared sensor 102 as shown in FIG. 5B. The present invention can be implemented on the same dimming module or the same chip.

Please refer to FIG. 6 , which is an internal diagram of an automatic dimming power supply according to another embodiment of the present invention. As shown in FIG. 6 , the dimmer 104 may further include a power supply unit 120 connected to the external DC power supply 4 . According to this design, the power source of the dimmer 104 does not need to be supplied by the digital power control unit 20 , but can be directly supplied by the external DC power supply 4 .

In addition, FIG. 7 is also an internal schematic diagram of an automatic dimming power supply according to another embodiment of the present invention. As shown in FIG. 7 , in addition to the infrared sensor 102 , the perceptual dimming and setting unit 10 disclosed in the present invention may further include a photoresistor sensor 122 for sensing a sensing signal. Generally speaking, photoresistors are very sensitive to ambient light. In this embodiment, the characteristics of photoresistors are used to sense the ambient brightness to adjust the illuminance of LED light string 3 in a timely manner, so as to achieve energy saving, carbon reduction, and low power consumption. .

According to the previous example, when the photoresistor sensor 122 senses that the ambient brightness is lower than a set value (for example: after dark), the photoresistor sensor 122 can first notify the digital power regulation unit 20 to use the maximum power. 100% of the power is output to the LED light string 3 for lighting. After that, according to the sensing result of the infrared sensor 102 (for example: whether there is a person passing by) to perform further step-by-step dimming.

Please refer to FIG. 8 , which is an internal schematic diagram of an auto-dimming power supply according to another embodiment of the present invention. As shown in Figure 8, all the above-mentioned components (signal processing unit 106, signal detection unit 108, digital control signal output unit 110, dimming setting unit 112, signal amplification unit 118, infrared sensor 102, photoresistor sensor 122) can be selectively set on a single system dimming module integrated chip 10' (System on chip, SOC) to achieve the purpose of system integration.

Furthermore, the auto-dimming power supply disclosed in the present invention can achieve the effect of group control. As shown in Figure 9, the perceptual dimming and its setting unit 10 can be connected to a plurality of digital power regulation units 20, and each digital power regulation unit 20 controls the luminous brightness of the LED light string 3, thereby achieving group purpose of control.

FIG. 10 is a device diagram of an automatic dimming power supply according to another embodiment of the present invention. As shown in FIG. 10 , the automatic dimming power supply may further include a sensory dimming and its setting unit 10 and An external electronic device 30 between the digital power regulation unit 20 . This electronic device 30 can be a personal computer (personal computer), a personal digital assistant (personal digital assistant), or a mobile phone (mobile phone), and the external electronic device 30 can receive the signal of the perceptual dimming and its setting unit 10 for processing, To notify the digital power regulation unit 20 to control the brightness of the light emitting diode string 3 .

To sum up, the automatic dimming power supply disclosed by the present invention is an intelligent device that can directly use the AC mains to control the dimming of LED light strings. Through the above-mentioned components, the present invention can directly and effectively utilize the AC mains to achieve segmental dimming without relying on expensive sensing instruments and/or additional power conversion devices.

The above-described embodiments only illustrate the technical ideas and characteristics of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and should not limit the patent scope of the present invention with it, namely All equivalent changes or modifications made according to the spirit disclosed in the present invention should still fall within the patent scope of the present invention.

Claims (13)

1. power supply unit with an automatic light meter, it is connected between an alternating current and the LED light string, and is luminous to drive described LED light string, it is characterized in that, and described power supply unit with an automatic light meter comprises:

One perception light modulation and setup unit thereof, its perception one infra-red signal, and can produce various levels of brightness selection signal; And

One digital power regulation and control unit, its inside is provided with an AC/DC converting circuit, described alternating current is converted to direct current electric power output, described power supply regulator control system connects described perception light modulation and setup unit thereof, and select signal to adjust its electric power output according to the described infra-red signal of described perception light modulation and setup unit thereof and described a plurality of brightness, to change the luminosity of described LED light string.

2. power supply unit with an automatic light meter as claimed in claim 1 is characterized in that, wherein said perception light modulation and setup unit thereof comprise:

One dimmer, its inside is provided with a signal processing unit, a signal inspection unit, a digital controlled signal output unit and a light modulation setup unit, wherein said signal inspection unit, described digital controlled signal output unit are to be connected separately described signal processing unit with described light modulation setup unit, described light modulation setup unit produces described a plurality of brightness and selects signal, and signal corresponding time of delay is selected in each described brightness; And

At least one infrared sensor, connect described signal inspection unit, so that described signal processing unit is selected the corresponding accurate position of output voltage of adjusting described digital controlled signal output unit described time of delay of signal according to sensing result and each described brightness of described infrared sensor, to change the luminosity of described LED light string.

3. power supply unit with an automatic light meter as claimed in claim 2 is characterized in that, described dimmer more comprises a power-supply unit that is connected with external dc power.

4. power supply unit with an automatic light meter as claimed in claim 2 is characterized in that, described perception light modulation and setup unit thereof more comprise a signal amplification unit that is connected with described signal inspection unit, to amplify the sensing result of described infrared sensor.

5. power supply unit with an automatic light meter as claimed in claim 4 is characterized in that, described signal amplification unit optionally is arranged at described dimmer and described infrared sensor in one of them.

6. power supply unit with an automatic light meter as claimed in claim 2 is characterized in that, described perception light modulation and setup unit thereof more comprise a photo resistance perceptron, with perception one sensing signal.

7. power supply unit with an automatic light meter as claimed in claim 2 is characterized in that, described light modulation setup unit comprises:

One brightness selector switch produces described a plurality of brightness and selects signal; And

Adjust switch one time of delay, produces each described brightness and select signal corresponding described time of delay.

8. power supply unit with an automatic light meter as claimed in claim 2 is characterized in that, described dimmer and described infrared sensor optionally are arranged on the one chip.

9. power supply unit with an automatic light meter as claimed in claim 1, it is characterized in that, described digital power regulation and control unit more comprises the low-tension supply supply circuit of the described AC/DC converting circuit of a connection, one connects the electric power output control signal processing unit of described perception light modulation and setup unit thereof, one connects electric power output conversion and filter circuit and an electric power output control unit of described LED light string, wherein said AC/DC converting circuit is connected in described electric power output control unit, between described low-tension supply supply circuit and the described alternating current, described electric power output control unit is connected in described AC/DC converting circuit, between described electric power output conversion and filter circuit and the described electric power output control signal processing unit.

10. power supply unit with an automatic light meter as claimed in claim 9, it is characterized in that, described AC/DC converting circuit comprises an electromagnetic interference filter circuit, a rectification circuit and a merit because of Circuit tuning, described electromagnetic interference filter circuit connects described alternating current, described merit is described electric power output control unit because Circuit tuning connects, and described rectification circuit is connected in described electromagnetic interference filter circuit and described merit because of between the Circuit tuning.

11. power supply unit with an automatic light meter as claimed in claim 9, it is characterized in that, wherein said digital power regulation and control unit more comprises a detection signal change-over circuit, an overcurrent detecting circuit and an overvoltage circuit for detecting, described detection signal change-over circuit connects described electric power output control signal processing unit, described overcurrent detecting circuit and described overvoltage circuit for detecting are parallel with one another, and are connected between described detection signal change-over circuit, the output conversion of described electric power and filter circuit and the described LED light string.

12. power supply unit with an automatic light meter as claimed in claim 1, it is characterized in that, wherein said perception light modulation and setup unit thereof can connect a plurality of described digital power regulation and control unit, with the luminosity by the described LED light string of each described digital power regulation and control unit controls.

13. power supply unit with an automatic light meter as claimed in claim 1, it is characterized in that, comprise that more one is connected in the external electronic between described perception light modulation and setup unit and the described digital power regulation and control unit, to control the luminosity of described LED light string by described external electronic.

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