TWI420969B - Power-supply-detectable lamp - Google Patents

Description

Control module with power detection function and lamp constituting the same

The invention relates to a control module with a power supply detection function and a lamp thereof, and more particularly to a control module for adjusting an output signal according to a power supply terminal opening and closing frequency.

LED (light-emitting diode) on the market, because of its good luminous efficiency, long service life and low power consumption, it is widely used in various electronic products, such as household light sources, LED TVs, traffic lights, Flashlights, headlights, etc.

Please refer to FIG. 1 , which shows a conventional luminaire disclosed in the patent of the Republic of China Announcement No. M376097 "Brightness Adjustment Circuit" and the dimming control method adopted therein. The lamp 9 provides a driving voltage output to a lighting module 92 by using a voltage dividing circuit 91, and the lamp 9 further has a control circuit 93 for controlling the magnitude of the driving voltage output by the voltage dividing circuit 91. The light-emitting module 92 can relatively generate different brightness according to different driving voltages. However, the control method disclosed in the prior art is required to further provide a control component electrically connected to the control circuit 93 for the user to operate the control circuit 93 through the control component to adjust the brightness of the light module 92. However, this prior art utilizes the voltage dividing resistors to dim the power, which means that the power is wasted, which means that the efficiency is reduced, and the biggest disadvantage of the analog (resistance) dimming method is that the color temperature of the emitted light is different due to the LED current function. LED color transfer. For the above reasons, the present invention provides a control module capable of effectively improving the above-mentioned missing power supply detection function and a lamp thereof.

The object of the present invention is to improve the above-mentioned shortcomings, and to provide a control module with a power supply detection function and a lamp thereof, which utilizes a control module to control the brightness of a lamp according to the power supply state of a power supply unit, so as to enable The invention has the function of multi-segment brightness adjustment.

Another object of the present invention is to provide a control module having a power supply detection function and a lamp constituting the same, which utilizes the energy stored in an energy storage unit to continuously provide power to maintain an operation mechanism of an arithmetic component.

In order to achieve the foregoing object, the lamp with the power detection function of the present invention comprises: a power supply unit, a control module and a lighting module. The power supply unit is configured to provide a DC power; the control module is electrically connected to the power supply unit to receive and store the DC power of the power supply unit, and the control module generates a control signal according to the power supply status of the power supply unit; The lighting module is electrically connected to the power supply unit and the control module to receive the DC power and adjust the brightness according to the control signal.

The invention further provides a control module with a power detection function, comprising: an energy storage unit, a detection unit and a monitoring unit. The energy storage unit receives and stores the DC power; the detection unit generates a detection signal according to the power supply state of the DC power; the monitoring unit is electrically connected to the energy storage unit and the detection unit, respectively. Receiving power of the energy storage unit and the detection signal, and generating a control signal according to the detection signal.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

Please refer to FIG. 2, which discloses a control module with power supply detection function of the present invention and a lamp thereof. The lamp comprises a power supply unit 1, a control module 2 and a lighting module 3. The power supply unit 1 is provided with a DC power supply and is electrically connected to the control module 2 and the light-emitting module 3; the control module 2 is electrically connected to the light-emitting module 3 and outputs a control signal to the light-emitting module 3 The lighting module 3 adjusts the brightness according to the control signal.

More specifically, the power supply unit 1 preferably includes a rectifying circuit for rectifying an AC power source into a DC power source and outputting it to the control module 2 and the lighting module 3. As shown in FIG. 2, the rectifier circuit included in the power supply unit 1 is preferably a full bridge rectifier circuit.

The control module 2 has an energy storage unit 21, a detection unit 22 and a monitoring unit 23, wherein the energy storage unit 21 and the detection unit 22 are electrically connected between the power supply unit 1 and the monitoring unit 23, respectively. The energy storage unit 21 stores power and transmits power to the monitoring unit 23 when the power supply unit 1 is normally powered, and provides power required for the monitoring unit 23 to operate when the power supply unit 1 does not output power. The detecting unit 22 generates a detection signal to the monitoring unit 23 according to the power supply state of the power supply unit 1. The monitoring unit 23 is connected to the lighting module 3, so that the monitoring unit 23 determines that the control signal is generated by the detecting signal, and then transmits the control signal to the lighting module 3 to emit light.

In detail, the energy storage unit 21 preferably includes a storage capacitor 211 and a diode 212 connected in series between the power supply unit 1 and a grounding point, and the diode 212 is preferably electrically connected. It is connected in series between the storage capacitor 211 and the power supply unit 1. The detecting unit 22 is preferably configured by a first voltage dividing resistor 221 and a second voltage dividing resistor 222 connected in series between the power supply unit 1 and the grounding point, and the second voltage dividing resistor 222 The resistance value is preferably smaller than the resistance value of the first voltage dividing resistor 221, so that the detection signal has a smaller voltage amplitude than the power signal output by the power supply unit 1. The monitoring unit 23 has an arithmetic component 231, and the computing component 231 has a power terminal 231a, a sensing terminal 231b and a command terminal 231c, wherein the power terminal 231a is connected to the energy storage unit 21 to receive the The power supply unit 231a is preferably connected to the series connection between the storage capacitor 211 and the diode 212; the sensing end 231b is connected to the detection unit. 22, to receive the detection signal, and the sensing end 231b is preferably connected to the series connection between the two voltage dividing resistors 221, 222; and the command end 231c is connected to the lighting module 3, so that The control signal is transmitted. The computing component 231 can be selected as a driver chip (IC Chip), a microprocessor (MCU), a Field Programmable Gate Array (FPGA), and a complex programmable logic component (Complex). Programmable Logic Device (CPLD) or an Application Specific Integrated Circuit (ASIC). In addition, the monitoring unit 23 preferably further has a base diode 232 connected between the power terminal 231a and the grounding point to provide an overvoltage protection to prevent exceeding the base. The excessive voltage of the breakdown voltage of the nanodiode 232 destroys the arithmetic element 231. Please refer to FIG. 3, which illustrates another embodiment of the detecting unit 22 of the present invention, wherein the first voltage dividing resistor 221 or the second voltage dividing resistor 222 is formed by a photoresistor. It First, and preferably, the second voltage dividing resistor 222 is selected to be formed; and the computing element 231 is a driving chip (IC Chip).

Referring to FIG. 2 again, the light-emitting module 3 includes a driving circuit 31 and a light-emitting unit 32 connected in series between the power supply unit 1 and a grounding point. The driving circuit 31 is connected to the command terminal 231c of the computing component 231 to receive the control signal, thereby controlling the current through the lighting unit 32. In detail, the driving circuit 31 preferably has a power electronic switch 311, and the gate of the power electronic switch 311 is coupled to the command terminal 231c for controlling the voltage level of the control signal. The on state of the power electronic switch 311. In addition, the driving circuit 31 preferably further includes a third resistor 312 and a fourth resistor 313. The third resistor 312 is electrically connected between the gate terminal and the command terminal 231c. The fourth resistor 313 is electrically connected. Connected to the source terminal of the power electronic switch 311, so that the two resistors 312, 313 provide an overcurrent protection to prevent the current from excessively penetrating the power electronic switch 311. The light-emitting unit 32 emits light when the current supplied by the power supply unit 1 passes, and the light-emitting unit 32 is preferably composed of a light-emitting diode (LED) element 321; or, as shown in FIGS. 4 to 7 The LED element 321 and a buck circuit, a boost circuit, a flyback circuit or a forward circuit may be used to form other forms of the light-emitting units 33, 34, 35. Or 36.

In detail, as shown in FIG. 4, the capacitor 331 of the step-down circuit of the light-emitting unit 33 is electrically connected in parallel to the LED element 321 and electrically connected to an inductor 332, and is passed through the light-emitting unit 33. The diode 333 of the voltage circuit is turned on in one direction, and the output voltage drop can be achieved. Referring again to FIG. 5, the boosting circuit of the light emitting unit 34 and the foregoing The difference between the step-down circuit is that the LED element 321 of the light-emitting unit 34 is electrically connected in parallel with the capacitor 341 of the boosting circuit, and a diode 342 and an inductor 343 are connected in series to utilize the inductor. The energy released by the device 343 achieves the purpose of outputting the boosted voltage level. Wherein, since the input and output of the above-mentioned light-emitting units 33 and 34 are not isolated, they are more suitable for the case where the input and output are not insulated. In contrast, referring to FIG. 6 , the first capacitor 351 of the flyback circuit of the light-emitting unit 35 is electrically connected in parallel with the LED element 321 , and the first diode of the flyback circuit of the light-emitting unit 35 The 352 series is connected in series to the LED element 321 , and the second diode 353 of the flyback circuit of the light emitting unit 35 is electrically connected in series with a parallel circuit of a resistor 354 and a second capacitor 355 , and the second two The forward end of the polar body 353 is electrically connected to the driving circuit 31 of the light emitting unit 35, so that the primary side of the flyback circuit of the light emitting unit 35 can induce a voltage to the secondary side to achieve boosting or stepping down. And has the function of input and output isolation. In addition, as shown in FIG. 7, the forward circuit of the light-emitting unit 36 is different from the above-mentioned flyback circuit in that a series circuit of the LED element 321 and an inductor 362 is connected in parallel with a diode 361 so that The diode 361 is further utilized to reduce the loss of the forward circuit. The diode 361 preferably selects a Schottky diode to increase the efficiency of the forward circuit.

As mentioned above, please refer to Figures 2 and 3 at the same time. The control module of the power supply detection function and the operation principle of the lamp constructed thereof are as follows: When the power supply unit 1 is normally powered, the detection signal generated by the detecting unit 22 by the two voltage dividing resistors 221, 222 is a standard voltage level (for example, 2.5v); and when the power supply unit 1 This detection is detected when power is stopped. The detection signal generated by the unit 22 with the two voltage dividing resistors 221, 222 is at a low voltage level (for example, 0v). Therefore, the computing component 231 is configured to detect, by the sensing terminal 231b, a time point at which the detection signal is switched from the standard voltage level to the low voltage level, and switch from the low voltage level to the standard voltage level. The bit time is further determined to further determine at least one of a magnitude, a frequency, and a duty cycle ratio of the voltage value of the control signal, wherein the control signal is divided into a plurality of switching segments according to the magnitude, frequency or duty cycle of the voltage value. In addition, as shown in FIG. 3, when the control module 2 is completed by the other implementation manner, it can be operated only by blocking the light source of the photoresistor without controlling the power supply unit 1 Normal or stop power supply to adjust the brightness. That is, if the photoresistor is illuminated by the light source, the detection signal is at the standard voltage level (eg, 2.5 volts); and if the light source of the photoresistor is blocked to increase the resistance value of the photoresistor, The detection signal is at a high voltage level (for example: 5v). Different from the previously described embodiment, the computing component 231 is configured by the sensing terminal 231b to detect the time when the detecting signal is switched from the standard voltage level to the high voltage level, and the high voltage level is determined by the sensing terminal 231b. The bit is switched to the point in time of the standard voltage level.

In detail, when the control signal is one of the plurality of switching segment bits, and the detection signal is switched from the standard voltage level to the low voltage level at a switching time point (or by the standard voltage) When the level is switched to the high voltage level, the computing component 231 detects whether the detection signal is switched from the low voltage level to the standard voltage level within a preset time after the switching time point ( Or switch from the high voltage level to the standard voltage level). If the detection signal is switched within the preset time, the computing component 231 adjusts the control signal to the next switching segment; otherwise, it remains in the same Switch the segment bit. Thereby, the brightness of the light-emitting module 3 can be controlled by using the control signal.

For example, the preset control signal can be divided into four switching segment bits, and the four switching segment bits respectively correspond to the illuminating amounts of 25%, 50%, 75%, and 100% of the maximum brightness of the lighting module 3, And the preset time is 1 second. If the original switching segment of the control signal corresponds to 50% of the amount of illumination, and if the detection signal is within 1 second after the switching time, the low voltage level is switched to the standard voltage level (or by the When the high voltage level is switched to the standard voltage level, the control signal is changed to the next switching stage position so that the illumination quantity of the illumination module 3 is 75% of its maximum brightness; and if the switching time is If the low voltage level is not switched to the standard voltage level (or switched from the high voltage level to the standard voltage level) within 1 second, the control signal remains as the original switching stage bit (ie, corresponding to The amount of light emitted by 50% of the maximum brightness of the light-emitting module 3). Thereby, the lamp of the invention can have the function of multi-segment brightness adjustment.

When the duty cycle ratio of the voltage value of the control signal is different, the arithmetic component 231 outputs a Pulse Width Modulation (PWM) signal to determine the on-time ratio of the driving circuit 31, thereby achieving The adjustable power current output drives the lighting unit 32.

In summary, the control module with the power detection function of the present invention and the lamp constituting the same are mainly used for maintaining the continuous operation of the monitoring unit 23 by the energy storage unit 21, and the detection unit 22 is used to provide the Detecting the signal, so that the monitoring unit 23 determines the power supply status of the power supply unit 1 according to the detection signal, and then adjusts the control unit to make the luminaire of the present invention have multiple segments. Brightness adjustment function.

The control module with the power supply detection function and the lamp of the same according to the present invention utilize a control module to control the brightness of a light fixture according to the power supply state of a power supply unit, so that the present invention has the effect of multi-segment brightness adjustment.

The control module with the power supply detection function of the present invention and the luminaire constructed thereof utilize the electric energy stored by an energy storage unit to continuously provide power to maintain the operation of an arithmetic component.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

〔this invention〕

1‧‧‧Power supply unit

2‧‧‧Control Module

21‧‧‧ Energy storage unit

211‧‧‧ storage capacitor

212‧‧‧ diode

22‧‧‧Detection unit

221‧‧‧First voltage divider resistor

222‧‧‧Second voltage divider resistor

23‧‧‧Monitoring unit

231‧‧‧Arithmetic components

231a‧‧‧Power terminal

231b‧‧‧ Sense end

231c‧‧‧Command side

232‧‧‧Kina II

3‧‧‧Lighting module

31‧‧‧Drive circuit

311‧‧‧Power electronic switch

312‧‧‧ Third resistor

313‧‧‧fourth resistor

32‧‧‧Lighting unit

321‧‧‧LED components

33‧‧‧Lighting unit

331‧‧‧ capacitor

332‧‧‧Inductors

333‧‧‧ diode

34‧‧‧Lighting unit

341‧‧‧ capacitor

342‧‧‧ diode

343‧‧‧Inductors

35‧‧‧Lighting unit

351‧‧‧First capacitor

352‧‧‧First Diode

353‧‧‧Secondary dipole

354‧‧‧Resistors

355‧‧‧second capacitor

36‧‧‧Lighting unit

361‧‧ ‧ diode

362‧‧‧Inductors

[study]

9‧‧‧Lighting

91‧‧‧voltage circuit

92‧‧‧Lighting module

93‧‧‧Control circuit

Figure 1: Schematic diagram of the conventional luminaire and the dimming control method used.

2 is a schematic diagram of a control module of a power supply detection function and a circuit diagram of the same constructed by the preferred embodiment of the present invention.

Figure 3 is a circuit diagram showing another embodiment of a control module in accordance with a preferred embodiment of the present invention.

Figure 4 is a circuit diagram of a light emitting unit having a step-down circuit in accordance with a preferred embodiment of the present invention.

Fig. 5 is a circuit diagram of a light-emitting unit having a booster circuit in accordance with a preferred embodiment of the present invention.

Figure 6 is a circuit diagram of a light emitting unit having a flyback circuit in accordance with a preferred embodiment of the present invention.

Figure 7 is a circuit diagram of a light unit having a forward circuit in accordance with a preferred embodiment of the present invention.

1. . . Power supply unit

2. . . Control module

twenty one. . . Energy storage unit

211. . . Storage capacitor

212. . . Dipole

twenty two. . . Detection unit

221. . . First voltage divider resistor

222. . . Second voltage dividing resistor

twenty three. . . Monitoring unit

231. . . Arithmetic component

231a. . . Power terminal

231b. . . Sensing end

231c. . . Command side

232. . . Kina diode

3. . . Light module

31. . . Drive circuit

311. . . Power electronic switch

312. . . Third resistance

313. . . Fourth resistor

32. . . Light unit

321. . . LED component

Claims (14)

A luminaire with a power supply detection function includes: a power supply unit that provides DC power; a control module electrically connected to the power supply unit to receive and store DC power of the power supply unit, and the control mode The group generates a control signal according to the power supply state of the power supply unit. The control module has an energy storage unit, a detection unit and a monitoring unit. The energy storage unit is electrically connected to the power supply unit and the monitoring unit respectively. Receiving and storing the power of the power supply unit and supplying power to the monitoring unit, the energy storage unit includes a storage capacitor and a diode connected in series with each other, and the storage capacitor and the diode are connected to the power supply unit and connected Between the locations, and the series connection between the storage capacitor and the diode is connected to the monitoring unit, the detecting unit generates a detection signal according to the power supply state of the power supply unit, and the monitoring unit is electrically connected. The detection unit receives the detection signal and generates the control signal according to the detection signal; and an illumination module electrically connected to the power supply unit and the control module, respectively The received DC power and adjust the brightness according to the control signal. A luminaire with a power supply detection function includes: a power supply unit that provides DC power; a control module electrically connected to the power supply unit to receive and store DC power of the power supply unit, and the control mode The group generates a control signal according to the power supply state of the power supply unit. The control module has an energy storage unit, a detection unit and a monitoring unit. The energy storage unit is electrically connected to the power supply unit and the monitoring unit respectively. Receive and store the power supply list The power is supplied to the monitoring unit, and the detecting unit generates a detecting signal according to the power supply state of the power supply unit, and the detecting unit includes one of the first voltage dividing resistor and the second voltage dividing resistor connected to each other in series The two voltage dividing resistor is connected between the power supply unit and a grounding point, and the series connection between the two voltage dividing resistors is connected to the monitoring unit, and the monitoring unit is electrically connected to the detecting unit to receive the The detection signal is generated, and the control signal is generated according to the detection signal; and a light-emitting module is electrically connected to the power supply unit and the control module to receive the DC power and adjust the brightness according to the control signal. The lamp having the power detecting function according to the second aspect of the patent application, wherein one of the first voltage dividing resistor and the second voltage dividing resistor is a photoresistor. A luminaire with a power supply detection function includes: a power supply unit that provides DC power; a control module electrically connected to the power supply unit to receive and store DC power of the power supply unit, and the control mode The group generates a control signal according to the power supply state of the power supply unit. The control module has an energy storage unit, a detection unit and a monitoring unit. The energy storage unit is electrically connected to the power supply unit and the monitoring unit respectively. Receiving and storing the power of the power supply unit and supplying power to the monitoring unit, the detecting unit generates a detection signal according to the power supply state of the power supply unit, and the monitoring unit is electrically connected to the detecting unit to receive the detection signal. And generating the control signal according to the detection signal, the monitoring unit includes an operation component, and the operation component has a power terminal, a sensing terminal and a command terminal, wherein the power terminal is connected to the energy storage unit, The sensing end is connected to the detecting unit, The command terminal is connected to a light emitting module, and the monitoring unit further has a base diode connected between the power terminal and a grounding point; and the light emitting module is electrically connected to the power supply unit and the control module respectively a group to receive the DC power and adjust the brightness according to the control signal. The illuminating module has a power supply detecting function according to the first, second or fourth aspect of the patent application, wherein the illuminating module comprises a driving circuit and an illuminating unit connected in series between the power supply unit and the grounding point. The lamp having the power detecting function according to the fifth aspect of the patent application, wherein the light emitting unit comprises a light emitting diode component, and a step-down circuit, a boosting circuit, a flyback circuit or a forward direction Circuit. The luminaire with the power detection function according to the fourth aspect of the patent application, wherein the computing component can be selected as a driving chip, a microprocessor, a domain programmable logic gate array, a complex programmable logic component or A special application integrated circuit. A lamp having a power detecting function according to the first, second or fourth aspect of the patent application, wherein the control module is capable of modulating at least one of a magnitude, a frequency and a duty cycle ratio of a voltage value of the output control signal . A control module with a power supply detection function includes: an energy storage unit that receives and stores the DC power; and a detection unit that generates a detection signal according to the power supply state of the DC power, the detection unit The first voltage dividing resistor and the second voltage dividing resistor are connected to each other, and the series connection between the two voltage dividing resistors is connected to the monitoring unit; and a monitoring unit is electrically connected to the storage The energy unit and the detecting unit receive the power of the energy storage unit and the detection signal, and according to the The detection signal generates a control signal. The control module with the power supply detection function according to claim 9 of the patent application, wherein one of the first voltage dividing resistor and the second voltage dividing resistor is a photoresistor. A control module with a power supply detection function includes: an energy storage unit that receives and stores the DC power, the energy storage unit includes a storage capacitor and a diode connected in series with each other, and the energy storage a series connection between the capacitor and the diode is connected to a monitoring unit; a detecting unit generates a detecting signal according to the power supply state of the DC power; and the monitoring unit is electrically connected to the energy storage device The unit and the detecting unit receive power of the energy storage unit and the detection signal, and generate a control signal according to the detection signal. A control module with a power supply detection function includes: an energy storage unit that receives and stores the DC power; a detection unit that generates a detection signal according to the power supply state of the DC power; and a monitoring unit The electrical energy is connected to the energy storage unit and the detection unit to receive the power of the energy storage unit and the detection signal, and generate a control signal according to the detection signal. The monitoring unit includes an arithmetic component. The computing component has a power terminal, a sensing terminal and a command terminal, wherein the power terminal is connected to the energy storage unit, and the sensing terminal is connected to the detecting unit to receive the detection signal, and the command terminal outputs The control unit further has a base diode connected between the power terminal and a ground point. According to the control module of the power supply detecting function described in claim 12, wherein the computing component can be selected as a driving chip, a microprocessor, a domain programmable logic gate array, and a complex programmable logic. Component or a special application integrated circuit. The control module with the power detection function according to the scope of claim 9, 11 or 12, wherein the monitoring unit can modulate at least the magnitude, frequency and duty cycle ratio of the voltage value of the output control signal One.