TWI407841B - Digital Addressing Dimming Lighting System - Google Patents

Abstract

A digital addressable dimming lighting system comprises a power conversion device and a digital dimming device. The digital dimming device includes an USB/DALI conversion circuit, an optical coupler, a micro-controller and a plurality of dimming circuits. The USB/DALI conversion circuit receives digital addressable dimming instruction. The optical coupler is connected to the USB/DALI conversion circuit and delivers the digital addressable dimming instruction. The micro-controller, based on the digital addressable dimming instruction, issues signals with dimming-set frequency value to at least one dimmer circuit. Upon receiving the signals with dimming-set frequency value, the dimmer circuit outputs a dimming drive signal to its coupled resonant inverter. The resonant inverter, based on the dimming drive signal, provides a sinusoidal AC signal to its coupled lamp tube.

Description

Digital address dimming lighting system

The present invention relates to an illumination system, and more particularly to a digitally addressed dimming illumination system.

As the demand for lighting increases, the energy consumption is gradually increased. Therefore, some lighting systems for adjusting the brightness are proposed to achieve comfortable indoor lighting and energy conservation.

A lighting system with a Digital Addressable Lighting Interface (DALI) has the above functions, and the manager can control the brightness and dimming of any one of the lamps in the lighting system area according to requirements, or a plurality of lamps The collection of tubes becomes a special situational control.

As shown in Figure 1, the paper 'Cecilia Contenti, "Digitally Addressable DALI Dimming Ballast" IEEE conference paper, pp. 936-942, 2002.' exposes a DALI lighting system, which is suitable for an area according to the instructions issued by the administrator via a computer. The lamp is controlled and includes a power conversion device P2 and a digital dimming device P1.

The power conversion device P2 includes an electromagnetic interference (EMI) filter P21, a rectifier circuit P22, a power factor correction circuit P23, and a resonant converter P24.

The EMI filter P21 is electrically connected between the external power source and the rectifier circuit P22, and the power factor correction circuit P23 is electrically connected between the rectifier circuit P22 and the resonant converter P24, and the resonant converter P24 is changed according to a driving signal. The operating frequency of the lamp in the connection area.

The digital dimming device P1 outputs a dimming signal according to an instruction sent by the administrator in a digital form, and includes an RS-232/DALI conversion circuit P11, an optical coupler P12, a microcontroller P13, and a tone. Light control circuit P14.

The RS-232/DALI conversion circuit P11 receives the instruction from the administrator to send the digital form by the computer, and converts it into an analog form, and then transmits it to the microprocessor P13 via the optical coupler P12, so that the microprocessor P13 judges Whether to control the dimming circuit P14 to issue a drive signal.

A disadvantage of the conventional DALI illumination system is that when dimming the lamps of a plurality of regions, the number of corresponding power conversion devices increases proportionally as the number of regions increases, resulting in an increase in the number of components of the circuit. The cost is too high. In this case, as an example, as shown in FIG. 2, if the lamp of the second area is to be controlled, the power conversion device P2 is originally changed to two power conversion devices P2, and is used again. The RS-232 bridge circuit P11 serves as a transmission interface between the optical coupler P12 and the computer, and has a problem of a short transmission distance (below 15 meters) and a slow transmission speed (below 20 Kbps).

Accordingly, it is an object of the present invention to provide a digitally addressed dimming illumination system that avoids the above-described deficiencies and increases efficiency.

The digital address dimming illumination system is suitable for controlling a plurality of regions of the lamp, and comprises a power conversion device and a digital dimming device; the power conversion device includes a plurality of resonant converters, and the resonant converters are respectively electrically connected a lamp tube in the plurality of regions; the digital dimming device includes a USB/DALI conversion circuit, an optical coupler, a microcontroller, and a plurality of dimming circuits; the USB/DALI conversion circuit receives a computer from the computer a digital form of the address dimming command; the optocoupler is coupled to the USB/DALI conversion circuit and transmits the digital form of the address dimming command; the microcontroller is coupled to the optocoupler and the dimming circuit And transmitting, according to the digital form of the address dimming command, a signal having a frequency value of a dimming setting to at least one dimming circuit; the dimming circuits are respectively coupled to the resonant converters, and received a dimming circuit for dimming the set frequency value signal outputs a dimming driving signal to the resonant converter coupled thereto according to the frequency value of the dimming setting; and the resonant converter receiving the dimming driving signal According to the dimming driving signal, the DC signal into the AC signal is converted to a sine wave form is supplied to the lamps coupled thereto.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

As shown in FIG. 3, a preferred embodiment of the digitally-addressed dimming illumination system of the present invention is suitable for receiving a command in the form of digits issued by a manager using a computer as an interface, and according to the instruction, for a plurality of designated areas. The lamp is driven and adjusted, and includes a digital dimming device A1 and a power conversion device A2. The number of lamps in the region is 1, for convenience of description in the drawing, but is not limited thereto.

The digital dimming device A1 comprises: a full-speed universal serial bus (USB)/DALI conversion circuit B1, an optical coupler B2, a microcontroller B3, a power detector B4 and a plurality of dimming circuits B5 ( In Fig. 3, only two are shown for convenience of explanation, but are not limited to this number).

The power conversion device A2 includes an EMI filter C1, a full-wave rectifier C2, a power factor correction circuit C3, and a plurality of resonant converters C4 (only two are shown in FIG. 3 for convenience of description, but are not limited to this number. ).

The EMI filter C1 is electrically connected between the external power source and the full-wave rectifier C2, and the power factor correction circuit C3 is electrically connected to the full-wave rectifier C2 and the plurality of resonant converters C4, respectively, and the resonant converters C4 are electrically connected to Lamps in these areas.

The USB/DALI conversion circuit B1 is electrically connected between the computer and the optical coupler B2, and the microcontroller B3 is electrically connected to the optical coupler B2 and the plurality of dimming circuits B5, respectively, and each of the dimming circuits B5 is electrically connected to the corresponding Resonant inverter C4, and power detector B4 is electrically connected to the microcontroller B3 and the lamp of each area.

The digital dimming device A1 performs a dimming method as shown in FIG. 4 and includes the following steps:

Step 1: The microcontroller B3 determines the corresponding dimming circuit B5 of the lamp of the designated area according to the instruction issued by the manager, and includes the following sub-steps, as shown in FIG. 5:

Step 11: The administrator outputs a lighting command in the form of a digit by means of a computer interface, and converts the lighting command into a lighting command transmission suitable for the specification of the microcontroller B3 via the USB/DALI conversion circuit B1 and the optical coupler B2. To microcontroller B3.

Step 12: The microcontroller B3 receives the lighting command and decodes to identify which specified area of the light bulb will be lit, wherein the designated area may be one or a plurality, and the following is regarded as a convenient description. specific area.

Step 13: The microcontroller B3 sends a matching energy signal to the dimming circuit B5 corresponding to the lamp of the designated area.

Step 14: If the dimming circuit B5 is turned from the off state to the startup state, it indicates that it is in a normal state, and an initial driving signal having a starting frequency is supplied to the resonant converter C4 and a response signal is returned to the microcontroller. B3, and proceeds to step 15, and conversely, if the dimming circuit B5 is in a fault state, there will be no initial drive signal and response signal, and skip to step 16.

Step 15: The resonant converter C4 triggers the controlled lamp according to the initial drive signal of step 14. And in this step, wherein the detailed operation of the power conversion device A2 triggering the lamp tube is: the EMI filter C1 receives an AC sine wave signal from the external power source, thereby filtering the AC signal and the high frequency generated in the circuit. The harmonic component outputs a sine wave signal to the full-wave rectifying circuit C2, thereby converting the sine wave signal into a DC signal, and the input sine wave voltage and the input sine wave current are in phase by the power factor correcting circuit C3 to increase the power. a factor, and the resonant converter C4 receives the DC signal, and in turn converts the DC signal into a sine wave AC start signal based on the initial drive signal from the dimming circuit B5 to provide a lamp to the connected region .

Step 16: The microcontroller B3 regards the dimming circuit B5 as being in a fault state according to a response signal not received within a predetermined time, and issues a fault display signal to be transmitted back by the optical coupler B2 and the USB/DALI conversion circuit B1. Tell the computer to the manager.

Step 17: After the manager performs circuit troubleshooting on the dimming circuit B5 of step 16, the process returns to step 13.

The method for circuit troubleshooting can manually replace the faulty dimming circuit B5 with a new dimming circuit B5, or connect multiple sets of dimming circuits B5 in parallel by multiple switching modes as a backup, when there is dimming When the circuit B5 fault occurs, the administrator issues an instruction to control the switch switching to select other dimming circuit B5, or step 17 is changed to directly control the switch switching by the microcontroller B3 to select other standby dimming circuit B5. .

Step 2: The microcontroller B3 turns the lamp of the designated area into a warm-up state, and includes the following sub-steps, as shown in FIG. 6:

Step 21: The microcontroller B3 sends a signal having a preheating set frequency value to the dimming circuit B5.

Step 22: The dimming circuit B5 outputs a preheating drive signal to the resonant converter C4 of the lamp of the designated area according to the preheating set frequency value of the step 21.

Step 23: The resonant converter C4 preheats the controlled lamp according to the preheat drive signal of step 22. In this step, the operation of the power conversion device A2 is similar to that described in the step 15, except that the signal frequency supplied from the resonant converter C4 to the lamp of the connected area is the frequency value of the preheat setting.

Step 3: Turn the operating frequency of the lamp from the frequency value of the preheat setting to the frequency set by the lighting operation, and include the following sub-steps, as shown in Figure 7:

Step 31: After setting the warm-up time, the microcontroller B3 sends a signal having a frequency value of a little lamp operation setting to the dimming circuit B5.

Step 32: The dimming circuit B5 outputs a one-point lamp driving signal to the resonant converter C4 corresponding to the lamp tube of the designated area according to the frequency value set by the lighting operation of step 31.

Step 33: The resonant converter C4 lights the lamp of the designated area according to the lighting drive signal of step 32. In this step, the operation of the power conversion device A2 is similar to that described in step 15, except that the signal frequency supplied by the resonant converter C4 to the lamp of the connected area is the frequency value set by the lighting operation.

Step 34: The resonant converter C4 returns a lamp status signal to the microcontroller B3 according to whether the lighting is successful, so that the microcontroller B3 determines whether the lamp is faulty by the lamp status signal, if there is a lamp If the fault condition occurs, skip to step 35. Otherwise, skip to step 41.

Wherein, the lamp status signal is a code in the form of digits, and a plurality of codes are used to respectively indicate that the lamp is normal, the lamp is faulty, or there is no lamp.

Step 35: The microcontroller B3 sends a lamp fault display signal to the computer via the optical coupler B2 and the USB/DALI conversion circuit B1 to inform the manager.

Step 36: The manager performs lamp troubleshooting on the lamp of the designated area of step 34.

Step 37: The administrator returns to step 31 by using the computer as an instruction to re-heat up the microcontroller B3.

Step 4: The microcontroller B3 issues an instruction to adjust the operating frequency of the lamp in the designated area from the frequency set by the lighting operation to the frequency of the rated working setting, and includes the following sub-steps, as shown in FIG. 8:

Step 41: The microcontroller B3 sends a signal having a frequency value of a rated operational setting to the dimming circuit B5.

Step 42: The dimming circuit B5 outputs a rated frequency drive signal to the resonant converter C4 corresponding to the lamp of the designated area according to the frequency value set by the rated operation of step 41.

Step 43: The resonant converter C4 converts the operating frequency of the controlled lamp from the frequency set by the lighting to the frequency of the rated operating setting according to the rated frequency driving signal of step 42. In this step, the operation of the power conversion device A2 is similar to that described in step 15, except that the signal frequency supplied by the resonant converter C4 to the lamp of the connected area is the frequency value of the rated operation setting.

Step 5: Dimming the lamp and including the following sub-steps, as shown in Figure 9:

Step 51: After the lamp reaches the frequency of the rated working setting, the microcontroller B3 waits for the manager to issue a dimming command within a waiting time.

Step 52: After the waiting time is over, the microcontroller B3 will according to whether it has received the address dimming command from the manager, and if so, then skip to step 53, and if not, return to step 51.

In step 52, the detailed method of the microcontroller B3 receiving the address dimming command from the manager is: the administrator sends a digitized address dimming command by the computer, and then via the USB/DALI conversion circuit B1 and the The optical coupler B2 is delivered to the microcontroller B3.

Step 53: The microcontroller B3 sends a signal having a frequency value of a dimming setting to the dimming circuit B5.

Step 54: The dimming circuit B5 outputs a dimming driving signal to the resonant converter C4 corresponding to the lamp of the designated area according to the frequency value of the dimming setting of step 53.

Step 55: The resonant converter C4 converts the operating frequency of the controlled lamp from the frequency set by the rated operation to the frequency of the dimming setting according to the dimming driving signal of step 54.

Step 56: After the operating frequency of the lamp is changed to the frequency of the dimming setting, the controller B3 determines whether the lamp of the designated area reaches the power value of the dimming setting, and if not, skips to step 53, and if yes, jumps Go to step 61.

Wherein, in step 56, determining whether the lamp reaches the power value of the dimming setting is: the power detector B4 detects the voltage and current of the lamp to estimate a measured power, and then a predetermined power value. After the comparison, a power state value is returned to the microcontroller B3. If the power state value is at logic 1, it indicates that the power value reaches the dimming setting, and vice versa.

Step 61: After the lamp reaches the power value of the dimming setting, the microcontroller B3 waits for the manager to issue a closing command to close the lamp of the designated area within a waiting time.

Step 62: After the waiting time is over, the microcontroller B3 will, according to whether a shutdown command from the manager is received, if yes, then go to step 63, and if no, go back to step 61.

Step 63: The microcontroller B3 outputs a disable signal to the dimming circuit B5 to stop outputting the dimming drive signal and turn off the resonant converter C4, thereby extinguishing the lamp of the designated area.

In summary, the preferred embodiment of the present invention improves the transmission speed of the command by using a USB/DALI conversion circuit, and reduces the need for controlling the lamp tube by controlling the operation flow of the dimming method for the lamps above two regions. Circuit components (such as EMI filter C1, a full-wave rectifier C2, and a power factor correction circuit C3) not only reduce the cost and circuit complexity required by the hardware, but also increase the number of resonant converters C4. It is easy to reach the tube that extends the control range in multiple areas.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

1‧‧‧Steps to enable the dimming circuit

2‧‧‧Steps for preheating

3‧‧‧Steps for lighting

4‧‧‧Steps for frequency conversion

5‧‧‧Steps for dimming

11~17‧‧‧Steps to enable dimming circuit and troubleshoot

21~23‧‧‧Steps for lamp preheating

31~36‧‧‧Steps for lighting the lamp

41~43‧‧‧Steps to change the working frequency of the lamp

51~56‧‧‧Steps for dimming the lamp

61~63‧‧‧Steps for closing the tube

A1‧‧‧Digital dimming device

A2‧‧‧Power conversion device

B1‧‧‧USB/DALI conversion circuit

B2‧‧‧Optocoupler

B3‧‧‧Microcontroller

B4‧‧‧Power Detector

B5‧‧‧ dimming circuit

C1‧‧‧ EMI filter

C2‧‧‧ Full Wave Rectifier

C3‧‧‧ power factor correction circuit

C4‧‧‧Resonant Inverter

1 is a circuit diagram of a conventional digital address modulation dimming illumination system;

2 is another circuit diagram of a conventional illumination system;

Figure 3 is a circuit diagram of a preferred embodiment of the present invention;

Figure 4 is a flow chart of the preferred embodiment;

Figure 5 is a flow chart illustrating the steps of enabling the dimming circuit;

Figure 6 is a flow chart illustrating the steps of preheating the lamp;

Figure 7 is a flow chart illustrating the steps of lighting the lamp;

Figure 8 is a flow chart illustrating the steps of changing the operating frequency of the lamp; and

Figure 9 is a flow chart illustrating the steps of dimming the lamp.

A1. . . Digital dimmer

A2. . . Power conversion device

B1. . . USB/DALI conversion circuit

B2. . . Optocoupler

B3. . . Microcontroller

B4. . . Power detector

B5. . . Dimming circuit

C1. . . EMI filter

C2. . . Full wave rectifier

C3. . . Power factor correction circuit

C4. . . Resonant inverter

Claims (6)

A digital address dimming illumination system suitable for controlling a plurality of regions of a lamp, comprising a power conversion device and a digital dimming device; the power conversion device includes a plurality of resonant converters, the resonant converters respectively a lamp connected to the plurality of regions; the digital dimming device includes a USB/DALI conversion circuit, an optical coupler, a microcontroller, and a plurality of dimming circuits; the USB/DALI conversion circuit receives signals from a computer a digital form of the address dimming command; the optocoupler is coupled to the USB/DALI conversion circuit and transmits the digital form of the address dimming command; the microcontroller is coupled to the optocoupler and the dimming circuit And transmitting, according to the digital form of the address dimming command, a signal having a frequency value of a dimming setting to at least one dimming circuit; the dimming circuits are respectively coupled to the resonant converters, and received a dimming circuit having a signal of a frequency value of the dimming setting outputs a dimming driving signal to the resonant converter coupled thereto according to the frequency value of the dimming setting; and receiving the resonant switching of the dimming driving signal According to the dimming driving signal, the DC signal into the AC signal is converted to a sine wave form is supplied to the lamps coupled thereto. The digitally-addressed dimming lighting system of claim 1, wherein the microcontroller issues a rated working setting before the USB/DALI conversion circuit receives a digital form of the addressed dimming command. a signal of a predetermined frequency value is supplied to the dimming circuit, and the dimming circuit outputs a rated frequency driving signal to the resonant converter coupled thereto according to the frequency value of the rated working setting, and the resonant converter is further configured according to the The nominal frequency drive signal converts the operating frequency of the lamp coupled thereto to a frequency value of the nominal operating setting. The digitally-addressed dimming illumination system of claim 2, wherein the microcontroller emits a point before the microcontroller issues a signal having a nominal operating frequency value to the dimming circuit. The signal of the frequency value set by the lamp operation is given to the dimming circuit, and the dimming circuit outputs a light driving signal to the resonant converter coupled thereto according to the frequency value set by the lighting operation, and the resonant converter is further converted. The lamp is turned on according to the lighting driving signal. The digitally-addressed dimming lighting system of claim 3, wherein the microcontroller issues a signal before the microcontroller issues the signal having the frequency value of the lighting operation setting to the dimming circuit. a preheating set frequency value signal is given to the dimming circuit, and the dimming circuit outputs a preheating driving signal to the resonant converter coupled thereto according to the preheating set frequency value, and the resonant commutation The lamp is preheated according to the preheating drive signal. The digitally-positioned dimming illumination system according to claim 1, wherein after the dimming of the lamp, if the microcontroller receives a shutdown command, the microcontroller outputs a disable signal to The dimming circuit stops outputting the dimming frequency driving signal and turns off the resonant converter coupled thereto, thereby coupling the lamp to the resonant converter Extinguished. The digitally-addressed dimming lighting system according to claim 1, wherein the power conversion device further comprises an EMI filter, a full-wave rectifier and a power factor correction circuit, the EMI filter receiving the external power source. An AC sine wave signal, and then filtering a harmonic component of the AC signal to output a sine wave signal to the full wave rectification circuit, and converting the sine wave signal into the DC signal to the at least one resonant converter, and The power factor correction circuit makes an input sinusoidal voltage and an input sinusoidal current in phase to improve the power factor.