JPH08102363A - Lighting system - Google Patents

Abstract

PURPOSE: To provide both a one-to-one correspondence type and a one-to-(n) correspondence type and to make possible high-level control by providing a transmission interface portion with both a unipolar/bipolar determining portion for determining whether or not a rectangular-wave signal is unipolar or bipolar and a CPU. CONSTITUTION: A unipolar/bipolar determining circuit portion 6 is connected in parallel with both ends of an input terminal via a resistance R1 and consists of photocouplers PC1 , PC2 and phototransistors Tr1 , Tr2 , etc., the photocouplers having photodiodes D1 , D2 . When an input signal Sin is a duty signal, a current flows through the D1 of the PC1 , the Tr1 is turned on or off according to the signal Sin , and a detected voltage VA is turned on or off. When the signal Sin is bipolar signal, the D1 and D2 are alternately turned on and off, and thereby the Tr1 , Tr2 are alternately turned on and off and the detected voltages VA, VB alternately turn on and off. The states of the voltages VA, VB are monitored by timer interrupt, and whether the signal is unipolar or bipolar is determined from the states, and a dimming level signal is supplied to a power control portion 4 via a CPU9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device for lighting a lighting load, and more particularly to signal transmission of a lighting load device for externally controlling the lighting load.

[0002]

2. Description of the Related Art Conventionally, the signal transmission system of a lighting load device is
An operation device 1 for performing dimming and blinking of a lighting load as shown in FIG. 11 and a lighting load device A have a one-to-one correspondence via a transmission signal line 2a, and an operation device 1 as shown in FIG. And the lighting load devices A1 to An have a one-to-n correspondence with each other via the bus type transmission signal line 2b.

The one-to-one correspondence type is mostly an on / off control by a switch on the power feeding side, but an operation information S ₁ (for example, by a fader F by an operation device 1a as shown in FIG. 13 via a signal line 2a. Increasingly, the dimming level) can be transmitted to the lighting load device Aa, and the dimming control of the lighting load La and the power control to be supplied to the lighting load La such as on / off control can be performed in response to the transmission. That is, the transmission interface provided inside the lighting load device Aa - receives operation information S ₁ in a face 3b, and performs power control of the lighting load La by the power control unit 4 based on the operation information S _1. Here, when the illumination load La is an incandescent lamp or the like, the illumination load device Aa is a dimming unit, and most of them perform power control of the incandescent lamp by the phase control means. When the lighting load La is a fluorescent lamp or the like, the lighting load device Aa is a ballast, and power control of the fluorescent lamp is performed by various methods. Also, the lighting load La
There is also an integrated type of the lighting load device Aa.

Further, the operation information S ₁ is analog (from 0 to 1).
0V) was the mainstream, but the number of duty signals (pulse width) is increasing recently, and an example of the configuration is shown in FIG.
15 shows an example of the duty waveform, and FIG. 16 shows the definition of the duty waveform. This example is a method that shows an approximate dimming level in terms of a duty ratio, and is also a method that allows inexpensive insulation between devices.

On the other hand, the 1-to-n correspondence type is for a large-scale lighting system, and representative examples thereof include a bus type as shown in FIG. 17 and a feed wiring type as shown in FIG. Others include those that return the signal to the operation device 1 and those that do not. By the way, the one-to-n correspondence type has a lighting load La.
Performs high-performance control such as dimming the whole light source, controlling the group of a specific lighting load La with a single button, or repeating a predetermined flashing pattern. Used for. Generally, the operating device 1 is referred to as a central monitoring board (middle monitoring board) or a system controller.

For large-scale lighting systems such as those described above,
The transmission interface is separately configured as a terminal device, and the illumination load La is controlled by driving a relay of the terminal device to perform on / off control by a switch on the power feeding side, or by converting the operation information S ₁ once to the illumination load. The method of controlling La has been used.

There are various classifications of the transmission method of the operation information S _1. One of them is one in which the application direction of the power supply voltage is constant and the power is supplied only in the ON section, and the transmission interface 3 has a simple structure but is noisy. There are two types, one is a weak unipolar type and the other is a type in which the application direction of the power supply voltage is reversed and the transmission interface 3 has a complicated structure but is strong against noise. A typical example of a unipolar signal is a duo as shown in FIG.
A typical example of a bipolar signal is a signal standard such as RS422 or RS485 as shown in FIG. As another bipolar signal, lighting load device AMI (alternator)
There is also a method of making a determination based on the inversion time interval of the power supply voltage, a method of changing the frequency of the power supply voltage inversion, and the like.

[0008]

However, the lighting load device A of the one-to-one correspondence type and the lighting load device A of the one-to-n correspondence type use the same lighting load La.
Since the application is large, the transmission interface 3 must be separately prepared in order to share the one-to-one correspondence type and the one-to-n correspondence type in one lighting device, and the lighting device main body becomes expensive. However, there is a problem that the size becomes large.

The present invention has been made in view of the above problems, and an object thereof is to share a one-to-one correspondence type and a one-to-n correspondence type and to provide an illuminating device capable of advanced control. Is to provide.

[0010]

In order to solve the above problems, according to the invention of claim 1, a power control section for controlling the light output of the illumination load and a signal input section for inputting a rectangular wave signal. And a transmission interface section that receives a rectangular wave signal, converts it into an analog signal, and supplies it to the power control section as a dimming level signal, in a lighting device, the transmission interface section is a rectangular wave signal. And a CPU for receiving a rectangular wave signal determined by the unipolar / bipolar determination unit and supplying it as a dimming level signal to the power control unit. Is characterized by.

According to the second aspect of the present invention, a unipolar / bipolar judging section for judging unipolarity or bipolarity of the rectangular wave signal, and a rectangular wave signal judged by the unipolar / bipolar judging section for receiving electric power. CPU that supplies a dimming level signal to the control unit
And a transmission interface section that includes at least an erroneous connection detection section that detects that the polarities of the rectangular wave signals are positive and negative and that inputs the polarities of the rectangular wave signals to the CPU. Is characterized by.

According to a third aspect of the invention, the signal input section has a constant current means.

According to the fourth aspect of the invention, the transmission interface section resets the information of the rectangular wave signal input to the CPU and the nonvolatile memory for temporarily storing the rectangular wave signal input to the CPU. And a reset switching element.

[0014]

According to the first aspect of the present invention, a unipolar or bipolar rectangular wave signal is input from the signal input section to output a unipolar signal.
The bipolar determination unit determines whether the rectangular wave signal is unipolar or bipolar. If the determined rectangular wave signal is a unipolar signal, it is directly input to the CPU, and if it is a bipolar signal, it is converted into an analog signal and input to the CPU. The CPU supplies the dimming level signal of the lighting load to the power conversion unit to obtain an optical output according to the input signal (rectangular wave signal).

According to the second aspect of the present invention, a unipolar or bipolar rectangular wave signal is input from the signal input unit, and the unipolar / dipolar determination unit determines whether the rectangular wave signal is unipolar or bipolar. To do. If the discriminated rectangular wave signal is a unipolar signal,
It is directly input to the CPU, and if it is a bipolar signal, it is converted into an analog signal and input to the CPU. At this time, if the positive and negative polarities of the bipolar signal are reversely connected, the erroneous connection detection section inverts the positive and negative polarities of the bipolar signal to convert them into analog signals, which are input to the CPU. The CPU supplies the dimming level signal of the lighting load to the power conversion unit to obtain an optical output according to the input signal (rectangular wave signal).

According to the third aspect of the invention, the peaks are mutually
A plurality of input signals (rectangular wave signals) having different peak values are converted into a constant current by the constant current means in the input signal section and output from the input signal section.

According to the invention described in claim 4, the information of the input signal (rectangular wave signal) input to the CPU is temporarily stored in the non-volatile memory, and the input signal (rectangular wave signal) is stored until the next reset. Make information immutable.

[0018]

【Example】

(Embodiment 1) FIG. 1 is a circuit configuration diagram of a first embodiment of a transmission interface 3 according to the present invention, and FIG. 2 shows that an input signal S _in is a unipolar signal (for example, a duty signal). FIG. 3 shows an operation waveform diagram when the input signal S _in is a bipolar signal, and FIGS. 4 and 5 show operation flows of the CPU 9.

The transmission interface 3 receives a unipolar signal from a unipolar / bipolar judging circuit section 6 for judging unipolar and bipolar, and a duty / analog (D) signal via a selector 7.
/ I) conversion D / I conversion circuit 8, a CPU 9 that receives a unipolar signal or a bipolar signal and sends a dimming level signal to the power control unit 4, and a positive voltage and a negative voltage of the bipolar signal. The differential signal detection unit 11 detects the differential signal and inputs the differential voltage V _C to the serial signal determination circuit 10 inside the CPU 9. Here, the unipolar / bipolar determination circuit unit 6 uses the resistor R
Photocouplers PC ₁ and PC ₂ having photodiodes D ₁ and D ₂ respectively connected in parallel to both ends of the input terminal through ₁ and antiparallelly connected to each other, and photocouplers PC ₁ and PC ₂ Each phototransistor Tr ₁ ,
It consists of resistors R ₂ and R ₃ connected in series between the emitter terminal of Tr ₂ and the external power supply V _CC .

The operation will be briefly described below. First, input
Signal S_inIs a duty signal, photo coupler PC₁
Photodiode D₁Current flows to the input signal S_in
Depending on the photo coupler PC₁Transistor Tr₁But
Turn off, and as shown in FIG._AIs on
Off. On the other hand, photo coupler PC₂Photodiode D
₂Does not work because is always off₂To
Langista Tr₂Is always off, so it is shown in Fig. 2 (b).
Detection voltage V_B= V_CCBecomes CPU9 is
Detection voltage V at fixed time intervals _A, V_BSample and input
Signal S_inIs a low (L) level time, the detection voltage
V_B= V_CCIf so, the switching signal S₂Input to selector 7
And allow the selector. As shown in FIG. 2C, the signal V
_D= V_ABecomes Signal V_DIs transmitted to the D / I conversion circuit 8.
Is converted into D / I by the D / I conversion circuit 8 and then the CPU 9
Then, it is converted into the dimming level and transmitted to the power control unit 4.

Next, the input signal S_inIs a bipolar signal,
Photodiode D₁And Photodiode D₂Alternate with
The input signal S_inAccording to Transi
Star Tr₁, Tr₂Are alternately turned on and off, as shown in FIG.
As shown in (b), the detection voltage V _A, V_BAlternate on and off
I do. Detection voltage V_ADetected when the signal has fallen to L level
Voltage V_BRises or the detection voltage V_BIs L level
Detection voltage V_ATo stand up
Detect and permit differential voltage detection. In the difference signal detector 11
Detection voltage V_AAnd the detection voltage V_BDifference voltage V_CAnd output
It is transmitted to the serial signal determination circuit 10. Serial signal format
ON / OFF control is performed by judging the communication command in the constant circuit 10.
Alternatively, it is possible to perform dimming control.

The operation flow of the CPU 9 is shown in FIGS. 4 and 5, and the operation will be briefly described below. The states of the detection voltages V _A and V _B are monitored by a timer interrupt, and it is determined whether the detection signal is a unipolar signal or a bipolar signal depending on the state. That is,
First it is determined whether or not the detected voltage V _A falls than previous input value, when the risen detection voltage V _B when the detected voltage V _A falls from previous input value is determined to bipolar. Further, when no change detected voltage V _B when the detected voltage V _A falls from previous input values and inputs the detected voltage V _A is determined that unipolar. Next, the detection voltage V _B
In the same manner as the above detection voltage V _A , the detection voltage V _A is determined in the same manner as the above detection voltage V _B. For example, the input signal S _in
If the duty ratio is 100%, the detection voltages V _A , V
_Since both _B are at the H level, the number of timer interrupts is counted next, and if it is determined that they are the same for a certain period of time, it is determined as a unipolar signal and the detection voltage V _A is input.

As shown in FIG. 5, after determining whether the signal is a unipolar signal or a bipolar signal, if the signal is a unipolar signal, dimming control is performed according to the level of the analog input taken in. If it is a bipolar signal, the serial input port is monitored to determine the presence or absence of a command. If it is determined that there is a command, the command is interpreted and ON / OFF control is performed according to the command.
Dimming control or sequence operation can be performed.

According to the method as described above, it is possible to easily change the unipolar signal to the bipolar signal or the bipolar signal to the unipolar signal during the operation.

(Embodiment 2) FIG. 6 is a circuit configuration diagram of a second embodiment of the transmission interface 3 according to the present invention, and FIG.
It is a diagram showing an operation flow of the PU 9, and the difference from the first embodiment shown in FIG. 1 is that the difference signal detection unit 1 in the case of a bipolar signal.
That is, the erroneous connection detection unit 12 is connected between the output terminal of 1 and the CPU 9 to take a countermeasure against the erroneous reverse connection of the signal line 2.

In other words, when there is no signal output or when the stop signal is present, the mark time that always exists (one on and one off) is detected, and when it is judged to be a bipolar signal, the detection voltage V _B is monitored, If the detection voltage V _B is at H level for a certain period of time or longer, the difference voltage V _C is left unchanged. If the detected voltage V _B is at L level for a certain period of time or more, the difference voltage V _C is inverted to take a countermeasure when the signal line 2 is erroneously reverse-connected. The determination of the mark time may be added to the operation flow chart of the CPU 9 shown in FIG.

The erroneous connection detecting section 12 receives the difference voltage V _C and the inverter switching signal S ₃ and transmits the same to the CPU 9, and the buffer 13 for inverting the inverter switching signal S _3.
It is composed of an OT gate 14 and an inverter 14 which receives a difference voltage V _C and an inverter switching signal S ₃ via the NOT gate 14 and sends it to the CPU 9. The same components as those of the other first embodiment are designated by the same reference numerals and the description thereof will be omitted.

Further, the unipolar / bipolar determination circuit section 6 in the first and second embodiments has a photodiode as shown in FIG.
The constant current elements I ₁ and I ₂ may be connected in series to each of the transistors D ₁ and D ₂ . In addition, as shown in FIG. 9, a photodiode D
_The switching elements SW ₁ and SW ₂ may be connected in series to ₁ and D ₂ , respectively, and the input signal S _in may be once made into a constant voltage. With this configuration, 10V to 12V
The duty signal can be shared with the bipolar signal of ± 5V to ± 24V.

Further, by constantly judging the signal, the CP
As shown in FIG. 10, the non-volatile memory 17 such as the EEPROM for temporarily storing the information of the CPU 9 and the reset switching element SW ₃ for resetting the information are connected to the CPU 9 against the heavy processing of the U9. Thus, it is also possible to judge a unipolar signal and a bipolar signal during the reset operation.

[0030]

According to the first aspect of the present invention, the one-to-one correspondence type and the one-to-n correspondence type can be shared by one transmission interface circuit, and high-level control is possible. A lighting device can be provided.

According to the second aspect of the invention, the one-to-one correspondence type and the one-to-n correspondence type can be shared by one transmission interface circuit regardless of whether the bipolar signal is positive or negative. A lighting device that can perform various controls can be provided.

According to the third aspect of the invention, one transmission interface circuit is provided for the one-to-one correspondence type and the one-to-n correspondence type regardless of the peak value of the input signal (rectangular wave signal). It is possible to provide a lighting device which can be shared by the user and can be highly controlled.

According to the fourth aspect of the invention, one transmission interface circuit is provided for the one-to-one correspondence type and the one-to-n correspondence type regardless of the peak value of the input signal (rectangular wave signal). It is possible to provide a lighting device that can be shared with the CPU, can recommend processing of the CPU, and can perform advanced control.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a first embodiment according to the present invention.

FIG. 2 is a waveform diagram showing a unipolar signal according to the above embodiment.

FIG. 3 is a waveform diagram showing a bipolar signal according to the embodiment.

FIG. 4 is a diagram showing an operation flow of the CPU according to the embodiment.

FIG. 5 is a diagram showing another operation flow of the CPU according to the embodiment.

FIG. 6 is a circuit diagram showing a second embodiment according to the present invention.

FIG. 7 is a diagram showing an operation flow of the CPU according to the embodiment.

FIG. 8 is a diagram showing another circuit of the unipolar / bipolar determination circuit unit according to the present invention.

FIG. 9 is a diagram showing still another circuit of the unipolar / dipolar determination circuit unit according to the present invention.

FIG. 10 is a diagram showing another connection example of the CPU according to the present invention.

FIG. 11 is a block diagram showing a conventional example of a one-to-one correspondence type according to the present invention.

FIG. 12 is a block diagram showing a conventional example of a 1-to-n correspondence type according to the present invention.

FIG. 13 is a block diagram showing another conventional example of the one-to-one correspondence type according to the present invention.

FIG. 14 is a circuit diagram showing a conventional example of a one-to-one correspondence type transmission interface circuit according to the present invention.

FIG. 15 is a waveform diagram showing a unipolar signal according to the present invention.

FIG. 16 is a waveform diagram showing the definition of a unipolar signal according to the present invention.

FIG. 17 is a block diagram showing a conventional example of a 1-to-n correspondence bus type according to the present invention.

FIG. 18 is a block diagram showing a conventional example of a one-to-n correspondence feed type according to the present invention.

FIG. 19 is a waveform diagram showing a unipolar signal according to the present invention.

FIG. 20 is a waveform diagram showing a bipolar signal according to the present invention.

[Explanation of symbols]

 3 Transmission interface part 4 Power control part 6 Unipolar / bipolar determination part 10 CPU 12 Misconnection detection part La Lighting load S signal

Claims (4)

[Claims] 1. A power control unit for controlling a light output of a lighting load, a signal input unit for inputting a rectangular wave signal, a rectangular wave signal for receiving the rectangular wave signal, converting the signal into an analog signal, and controlling the dimming level by the power control unit. In a lighting device comprising at least a transmission interface unit supplied as a signal, the transmission interface unit includes a unipolar / bipolar determination unit for determining unipolarity or bipolarity of the rectangular wave signal, and the unipolar / bipolar determination unit. C which receives the rectangular wave signal determined by the pole / bipolar determination unit and supplies it to the power control unit as a dimming level signal C
A lighting device comprising at least a PU. 2. The illuminating device according to claim 1, wherein a unipolar / bipolar determination unit that determines unipolarity or bipolarity of the rectangular wave signal, and the rectangular wave signal determined by the unipolar / dipolar determination unit. In response to this, the CPU supplies the power control unit as a dimming level signal and detects that the rectangular wave signal has positive and negative polarities, and inputs the rectangular wave signal with positive and negative polarities to the CPU. The illuminating device, wherein the transmission interface section including at least an erroneous connection detecting section is added. 3. The lighting device according to claim 1, wherein the signal input section has a constant current means. 4. The transmission interface unit comprises the C
The nonvolatile memory for temporarily storing the rectangular wave signal input to PU, and a reset switching element for resetting the information of the rectangular wave signal input to the CPU are provided. Item 5. The lighting device according to any one of items 3.