TW201316833A - Automatic dimming power supply - Google Patents

Abstract

An automatic dimming power supply, which is connected between an AC power and an LED light string, to drive luminesce of the lamp string . Such automatic dimming power supply includes a sensing dimming and setting unit and a digital power supply control unit. Wherein, sensing dimming and setting unit may perceive an infrared signal, and generates a variety of luminance selection signal. Digital power supply control unit is disposed with an AC/DC conversion circuit, to convert the AC power into a DC power output. Digital power supply control unit is connected to the sensor dimming and setting unitfor adjusting the power output according to the infrared signal of sensing dimming and brightness selecting signal, thereby changing luminance of LED lamp string. Using such automatic dimming power supply, users do not need to set power conversion device additionally, capable of directly use the AC mains reach segmented dimming effect, and at the same time saving energy consuming.

Description

Automatic dimming power supply

The invention relates to a power supply for automatic dimming, in particular to a light-emitting diode power supply for directly connecting AC mains to control a plurality of illuminations of a light-emitting diode string.

With the improvement of the quality of life, the design of the home environment is constantly innovating. In order to match the aesthetics of the overall space, the design of the lighting has been highly valued. Among them, the LED lamp has a long life compared to the traditional tungsten lamp. The utility model has the advantages of energy saving, low failure rate, stable light, high luminous efficiency, and high compatibility with various lamps, and thus has become a mainstream commodity on the market.

In a general light-emitting diode lamp, a small-sized light emitting diode (LED) lamp and a power supply are mainly included to convert the power provided by the power supply into DC power. After pushing the above LED tube. This kind of design makes the LED light fixtures only form two types of lighting and non-lighting according to the presence or absence of the power source, and the conventional tungsten filament bulbs can have different levels of illumination levels as the power supply is changed. Therefore, the light-emitting diode lamps that are commonly used for people who generally pay attention to the quality of life and focus on energy-saving issues cannot fully satisfy the needs of users to adjust the lighting at any time in different regions or at different times to create an overall atmosphere. In addition, light-emitting diode lamps with only two types of lighting and non-lighting are also prone to energy consumption or limited application, which is not practical for most stores and houses that focus on the mood. Sex and convenience are not in line with the needs of modern people for energy conservation and carbon reduction.

In addition, the conventional LED lamp can only receive DC power to supply its power source to emit light under DC drive. In the case of a general home environment or the use of AC mains in a store, the light-emitting diode lamp of the prior art must have a light-emitting diode power supply connected in series at its front end for its power conversion. As a result, the LED lamp is not only limited in application, but also invisibly increases its manufacturing cost. If a person familiar with the art can propose a light-emitting diode power supply that adjusts the brightness of the light at any time, it can effectively solve the problems caused by the knowledge and promote the development of the industry.

The main object of the present invention is to provide an automatic dimming power supply connected between an AC mains and a light emitting diode string to directly drive the LED light string by using AC power, and At the same time, the power output of the light-emitting diode string is changed by adjusting the power output of the infrared signal in the sensing environment.

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

It is still another object of the present invention to provide an automatic dimming power supply that achieves group mode control by at least one sensor and/or at least one digital power regulating unit.

In order to achieve the above object, the present invention relates to an automatic dimming power supply connected between an alternating current and a light emitting diode string to drive the light emitting diode string to emit light. The power supply of the automatic dimming comprises: a sensing dimming and setting unit thereof and a digital power regulating unit. The sensing dimming and setting unit thereof can sense an infrared signal and generate a plurality of brightness selection signals. The internal power regulating unit is internally provided with an AC/DC conversion circuit for converting the above-mentioned alternating current into a direct current power output. The digital power regulating unit is connected to the sensing dimming and setting unit thereof, and adjusts the power output according to the infrared signal and the brightness selection signal of the sensing dimming and setting unit thereof, thereby changing the brightness of the light emitting diode string.

According to an embodiment of the present invention, the digital power supply control 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 sensing dimming and setting unit thereof, and a connection 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 alternating current, and the power output control unit is connected to The AC/DC conversion circuit, the power output conversion and filtering circuit and the power output control signal processing unit.

The AC/DC conversion circuit comprises an electromagnetic interference filter circuit, a rectifier circuit and a power factor adjustment circuit, 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 rectifier circuit is connected to the electromagnetic interference filter circuit. Between the power factor adjustment circuit and the power factor.

The purpose, technical contents, features and effects achieved by the present invention will be more readily understood by the detailed description of the embodiments and the accompanying drawings.

The invention provides an automatic dimming power supply, which directly receives AC power as a power source of a light-emitting diode string, and thereby controls the brightness of the light-emitting diode string.

This self-dimming power supply can be dimmed according to the infrared signal and ambient brightness in the environment to further save energy.

Please refer to FIG. 1 , which is a schematic diagram of a device for automatically dimming a power supply according to an embodiment of the present invention. The power supply 1 for automatic dimming is connected to an alternating current (AC) 2 and a light emitting diode 2 . Between the LED strings 3, it is used to drive the LEDs 3 to emit light.

According to an embodiment of the present invention, the automatic dimming power supply 1 includes a sensing dimming and setting unit 10 and a digital power regulating unit 20, wherein the sensing dimming and setting unit 10 is internally provided with an infrared sensor 102. And a dimmer 104 for sensing an infrared signal and generating more than one brightness selection signal. The digital power regulating unit 20 is connected to the sensing dimming and setting unit 10, thereby adjusting the power output according to the infrared signal and the brightness selection signal of the sensing dimming and setting unit 10 to change the light emission of the LED string 3 brightness.

The digital power regulating unit 20 is internally provided with an AC/DC converting circuit 22 (shown in FIG. 2) for converting the alternating current 2 into a direct current power source for driving the light emitting diode string 3. Thereby, the automatic dimming power supply 1 disclosed in the present invention can receive the AC mains and drive the LEDs 3 to emit light.

Please refer to FIG. 2, which is a schematic diagram of the internals of the digital power supply control unit 20 according to an embodiment of the present invention. As shown in FIG. 2, the digital power control unit 20 includes an AC/DC conversion circuit 22, a power output control unit 204, a power output conversion and filtering circuit 205, a low voltage power supply circuit 206, and a power output digital control signal. The processing unit 207, a detection signal conversion circuit 208, an overcurrent detection circuit 209, and an overvoltage detection circuit 210.

The AC/DC conversion circuit 22 includes an electromagnetic interference filter circuit 201, a rectifier circuit 202, and a power factor adjustment circuit 203. The electromagnetic interference filter circuit 201 is connected to the alternating current 2 to filter out the higher frequency noise in the commercial power. The power factor adjustment circuit 203 is connected to the power output control unit 204, and the rectifier circuit 202 is connected between the electromagnetic interference filter circuit 201 and the power factor adjustment circuit 203. Therefore, the digital power supply control unit 20 disclosed by the present invention converts the alternating current 2 into a direct current power source for driving the light-emitting diode string 3 by the AC/DC conversion circuit 22.

Still further, in accordance with an embodiment of the present invention, the low voltage power supply circuit 206 is coupled between the electromagnetic interference filter circuit 201, the power output control signal processing unit 207, and the sense dimming and setting unit 10. The power output control signal processing unit 207 is connected to the sensing dimming and setting unit 10, and the power output conversion and filtering circuit 205 is connected to the LED array 3, and the power output control unit 204 is connected to the power factor adjusting circuit 203 and the power output control signal. The processing unit 207 is coupled to the power output conversion and filtering circuit 205.

The detection signal conversion circuit 208 is connected to the power output control signal processing unit 207. The over current detection circuit 209 and the over voltage detection circuit 210 are connected in parallel with each other, and are respectively connected to the detection signal conversion circuit 208 and the power output conversion and filter circuit 205. Between the LED string 3 and the LED.

Thereby, the digital power control unit 20 can adjust the power output according to the infrared signal sensed by the sensing dimming and setting unit 10 and the plurality of brightness selection signals preset by the user, and change the light emission of the LED string 3 brightness.

It should be noted that the present invention is not limited to the sensing dimming and setting unit 10 including a single infrared sensor 102. In other words, as shown in FIG. 3, the sensing dimming and setting unit 10 disclosed in the present invention may also include a plurality of infrared sensors 102 for input control of the multi-sense system. The following is an explanation of the technical idea of the present invention, and the embodiment of FIG. 1 is taken as an example of a preferred one, but those skilled in the art can apply the method shown in FIG. 3 according to the technology disclosed in the present invention. Multi-sensing input is also within the scope of the invention.

Please refer to FIG. 4, which is an internal schematic diagram of a power supply for automatic dimming according to an embodiment of the present invention. As shown in FIG. 4, the dimmer 104 includes a signal processing unit 106, a signal detecting 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 each 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.

In accordance with an embodiment of the present invention, the brightness selection switch 114 can generate more than one brightness selection signal via a user's settings. Similarly, the delay time adjustment switch 116 can generate different delay times corresponding to different brightness lamp illuminations via the user's setting.

The infrared sensor 102 is connected to the signal detecting unit 108, whereby the dimming setting unit 112 generates one or more brightness selection signals via the user's setting, and the delay time corresponding to each brightness selection signal is also transmitted. When the delay time adjustment switch 116 is set, the signal processing unit 106 can determine the dimming energy to be sent according to the sensing result of the infrared sensor 102 and the setting of the dimming setting unit 112, and output the unit through the digital control signal. The output of 110 is to the digital power conditioning unit 20. In the present invention, the output power of the digital power control unit 20 is controlled by the output digital signal of the digital control signal output unit 110 to adjust the light-emitting brightness of the light-emitting diode string 3.

For example, the user can preset the brightness selection signal to be 100%, 75%, or 50% (that is, the light-emitting brightness of the light-emitting diode string 3 is 100%, 75%, 50%). And when the brightness selection signal is 100%, the corresponding delay time is 1 minute; when the brightness selection signal is 75%, the corresponding delay time is 1.5 minutes; when the brightness selection signal is 50%, the corresponding delay is The time is 0.5 minutes. Therefore, when the infrared sensor 102 senses that a person passes in the sensing range, the infrared sensor 102 can notify the digital power regulating unit 20 to output the maximum power, that is, 100% of the power to the light emitting diode lamp. String 3 lighting.

Thereafter, if the infrared sensor 102 senses that the person has left, the LED string 3 is continuously illuminated with a delay time of 1 minute, and is automatically adjusted down to 75% after 1 minute. Then, it is illuminated for 7 minutes with 75% illumination and then automatically reduced to 50% after 1.5 minutes. Finally, it is illuminated for 50 minutes with 50% illumination and automatically turned 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 sensing dimming and setting unit 10 disclosed in the present invention may further comprise a signal amplification connected to the signal detecting unit 108. Unit 118. The signal amplifying unit 118 can be selectively integrated with the dimmer 104 on the same dimming module or the same wafer as shown in FIG. 5A, or as shown in FIG. 5B, and the infrared sensor. 102 integrated in the same dimming module or on the same wafer can be used to implement the present invention.

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

In addition, FIG. 7 is also an internal schematic diagram of a power supply for automatic dimming according to another embodiment of the present invention. As shown in FIG. 7, the sensing dimming and setting unit 10 of the present invention further includes a photoresistor sensor 122 for sensing a sensing signal in addition to the infrared sensor 102. In general, the photoresistor is very sensitive to ambient light. In this embodiment, the brightness of the light-sensitive diode is used to sense the ambient brightness, so as to adjust the illumination of the LED string 3 in time to achieve energy saving, carbon reduction and low power consumption. And other effects.

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 may first notify the digital power regulation unit 20 to have a maximum power of 100. The % power output is illuminated to the LED string 3 of the LED. Then, according to the sensing result of the infrared sensor 102 (for example, whether there is a person passing by), further segmentation dimming is performed.

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

Furthermore, the power supply of the auto-dimming disclosed by the present invention can achieve the effect of group control. As shown in FIG. 9, the sensing dimming and setting unit 10 can be connected to a plurality of digital power regulating units 20, and the luminous brightness of the LED string 3 is controlled by each digital power regulating unit 20. This achieves the purpose of group control.

Figure 10 is a schematic diagram of an apparatus for automatically dimming a power supply according to another embodiment of the present invention. As shown in Fig. 10, the automatic dimming power supply may further include a connection to the sensing dimming and its setting unit. External electronic device 30 between 10 and digital power conditioning unit 20. The electronic device 30 can be a personal computer, a personal digital assistant, or a mobile phone. The external electronic device 30 can receive the signal of the sensing dimming and setting unit 10 for processing. The digital power regulating unit 20 is notified to control the light-emitting luminance of the light-emitting diode string 3.

In summary, the power supply device for automatic dimming disclosed in the present invention is a smart device capable of directly performing dimming control of a light-emitting diode string by using AC mains. With the above components, the present invention can directly and effectively utilize the AC mains to achieve the effect of segmented dimming without relying on expensive sensing instruments and/or additional power conversion devices.

The embodiments described above are merely illustrative of the technical spirit and the features of the present invention, and the objects of the present invention can be understood by those skilled in the art, and the scope of the present invention cannot be limited thereto. That is, the equivalent variations or modifications made by the spirit of the present invention should still be included in the scope of the present invention.

1. . . Automatic dimming power supply

2. . . AC

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

twenty two. . . AC/DC converter circuit

30. . . External electronic device

102. . . Infrared sensor

104. . . Light modulator

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. . . Photosensitive resistance sensor

201. . . Electromagnetic interference filter circuit

202. . . Rectifier 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

1 is a schematic diagram of an apparatus for automatically dimming a power supply according to an embodiment of the present invention.

Figure 2 is a schematic diagram of the internals of a digital power supply control unit in accordance with an embodiment of the present invention.

Figure 3 is a schematic diagram of an apparatus for an automatic dimming power supply having multiple sensing inputs in accordance with an embodiment of the present invention.

Figure 4 is a schematic diagram of the internals of a power supply for automatic dimming in accordance with an embodiment of the present invention.

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

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

Figure 6 is a schematic diagram of the internals of a power supply with automatic dimming of a power supply unit in accordance with another embodiment of the present invention.

Figure 7 is a schematic diagram of the internals of a power supply having an automatic dimming of a photoresistor sensor in accordance with another embodiment of the present invention.

Figure 8 is a schematic diagram of the internal integration of a power supply for automatic dimming in a single system wafer in accordance with an embodiment of the present invention.

Figure 9 is a schematic diagram of an apparatus for a group-controlled automatic dimming power supply according to an embodiment of the present invention.

Figure 10 is a schematic diagram of an apparatus for an automatic dimming power supply having an external electronic device in accordance with an embodiment of the present invention.

10’. . . Dimming module integrated chip

20. . . Digital power control unit

102. . . Infrared sensor

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

122. . . Photosensitive resistance sensor

Claims (13)

An automatic dimming power supply is connected between an alternating current and a light emitting diode string to drive the light emitting diode string to emit light. The automatic dimming power supply comprises: a sensing tone Light and its setting unit, which senses an infrared signal and can generate a plurality of brightness selection signals; and a digital power supply control unit internally provided with an AC/DC conversion circuit for converting the alternating current into a direct current power output, The power control system is connected to the sensing dimming and setting unit thereof, and adjusts the power output according to the infrared signal of the sensing dimming and its setting unit and the brightness selection signals to change the brightness of the light emitting diode string . The automatic dimming power supply device of claim 1, wherein the sensing dimming and setting unit comprises: a dimmer having a signal processing unit, a signal detecting unit, and a digital control signal output a unit and a dimming setting unit, wherein the signal detecting unit, the digital control signal output unit and the dimming setting unit are respectively connected to the signal processing unit, and the dimming setting unit generates the brightness selection signals, and each The brightness selection signal corresponds to a delay time; and at least one infrared sensor is connected to the signal detection unit, so that the signal processing unit corresponds to each of the brightness selection signals according to the sensing result of the infrared sensor The delay time adjusts the output voltage level of the digital control signal output unit to change the light-emitting brightness of the light-emitting diode string. The automatic dimming power supply of claim 2, wherein the dimmer further comprises a power supply unit connected to the external DC power source. The automatic dimming power supply device of claim 2, wherein the sensing dimming and setting unit further comprises a signal amplifying unit connected to the signal detecting unit to amplify the sensing result of the infrared sensor . The automatic dimming power supply of claim 4, wherein the signal amplifying unit is selectively disposed in one of the dimmer and the infrared sensor. The automatic dimming power supply of claim 2, wherein the sensing dimming and setting unit further comprises a photoresistor sensor for sensing a sensing signal. The power supply device of claim 2, wherein the dimming setting unit comprises: a brightness selection switch for generating the brightness selection signals; and a delay time adjustment switch for generating each of the brightness selection signals Corresponding to this delay time. The automatic dimming power supply of claim 2, wherein the dimmer and the infrared sensor are selectively disposed on a single wafer. The automatic dimming power supply device of claim 1, wherein the digital power regulating unit further comprises a low voltage power supply circuit connected to the AC/DC conversion circuit, and a power output connected to the sensing dimming and setting unit thereof. a control signal processing unit, a power output conversion and filtering circuit connected to the LED string, and a power output control unit, wherein the AC/DC conversion circuit is connected to the power output control unit, the low voltage power supply circuit, and The power output control unit is coupled between the alternating current and the power/output conversion circuit, the power output conversion and filtering circuit, and the power output control signal processing unit. The power supply device for automatic dimming according to claim 9, wherein the AC/DC conversion circuit comprises an electromagnetic interference filter circuit, a rectifier circuit and a power factor adjustment circuit, wherein the electromagnetic interference filter circuit is connected to the alternating current, the work The rectifier circuit is connected to the power output control unit, and the rectifier circuit is connected between the electromagnetic interference filter circuit and the power factor adjustment circuit. The automatic dimming power supply device of claim 9, wherein the digital power supply control unit further comprises a detection signal conversion circuit, an overcurrent detection circuit and an overvoltage detection circuit, the detection signal conversion circuit Connecting the power output control signal processing unit, the overcurrent detection circuit and the overvoltage detection circuit are connected in parallel, and are connected to the detection signal conversion circuit, the power output conversion and filter circuit, and the LED light Between strings. The automatic dimming power supply device of claim 1, wherein the sensing dimming and setting unit thereof can connect a plurality of the digital power regulating units to control the light emitting diode by each of the digital power regulating units The brightness of the light string. The automatic dimming power supply device of claim 1, further comprising an external electronic device connected between the sensing dimming and its setting unit and the digital power regulating unit, to control the external electronic device The brightness of the light emitting diode string.