JPS62100992A - Lamp burner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a lamp lighting device that sequentially lights a plurality of lamps each emitting light of a different color, controls each lighting period, and changes the color of illumination light. It is.

[Background technology]

FIG. 12 is a circuit diagram showing the configuration of a conventional example.

In this conventional example, three incandescent lamps L II , L 12 , L
13 are connected in parallel, each incandescent lamp L II , L
If , L 13 has a triac TR, , TR,2
, TR, 3 are connected in series. Each of the triac TRs (old TR12, TR13) is connected to a three-phase oscillator Oc that generates signals with different phases by 120 degrees. Each control circuit CN, , CN, 2. Ignition is controlled by CN,3. A gate signal is sequentially applied to each triac TR, ,,TR,,,TR,3 from each control circuit CN,,,CN,□,CN,3, and each triac TRII,TRl
When the firing angle of 1T R, , is changed periodically, the 13th
Each incandescent lamp L u , LH, L 13 as shown in the figure
The luminous flux changes, and the color of the illumination light, which is a mixture of the emitted light colors, changes periodically.

In this conventional example, each incandescent lamp L II , L H, L
13 are independently controlled to light up, and as shown in FIG. 13, each incandescent lamp L II , L H= L 1
Since the luminous flux of No. 3 changes, the total luminous flux is not always constant, and there is a problem that the brightness also changes as the color of the illumination light changes.

In addition to this conventional example, a lamp lighting device as shown in FIG. 14 has been proposed.

This lamp lighting device includes three discharge lamps L 14 , LIs , L 16 each emitting light of a different color, a sequential repetition lighting means SD for sequentially and repeatedly lighting the discharge lamps L 14 , LIs , L II, and a discharge lamp. L 1
4, L Is.

It is equipped with a multi-axis variable resistor (generally called a joystick) JS for setting the duty cycle for lighting L12. Sequential repeated lighting means SD
are lamp current supply means CS and transistor Q II
, QH, Q13, a pulse generator MOC, and a timer circuit TM.

The operation of this lamp lighting device will be explained with reference to the timing chart of FIG. Figure 15 (1) shows the Q of the monostable multi-high break M V 1) of the pulse generator MOC.
Figure 15 (2) shows the monostable multi-by break MV of the timer circuit TM, and the Q output of □, and Figure 15 (3) shows the monostable multi-by break M of the timer circuit TM.
15(4) shows the Q output of the monostable multivib break M V ,4 of the timer circuit TM. Monostable multi-by-break Mv once every period T
A seven-node pulse is output from the Q output terminal of ll. When a reset pulse is applied, the Q output of the monostable multi-high break M■II rises from low level to high level, and the monostable multi-bi break Mv1. The Q output of the primary monostable multi-high break Mv13 becomes high level during the period t1, and the Q output of the primary monostable multi-high break Mv13 becomes high level during the period t2, and finally the monostable multi-bi break Mv1
The Q output of No. 4 is at a high level for a period ta until the next seven pulses are input. The Q output terminal of each monostable multi-bi break M V ,... ~ M V14 is connected to the base of each transistor Qll ~ Q13, and as mentioned above, the Q output terminal of each monostable multi-bi break M V ,... ~ M
When the Q output of V+4 becomes high level sequentially for a predetermined period, each of the transistors Qll-Q13 becomes conductive in sequence, and the discharge lamps L14-L18 are sequentially turned on. By changing each period t, ~t3 during which the Q output of each monostable multi-by-break M V , 2 to MVI4 is at a high level, the duty cycle for lighting each discharge lamp L14 to I-+e can be changed. can. Each period t
Among periods 1 to L3, periods t, L2 are set by the operation of the multi-axis variable resistor JS described above. This timer circuit TM
Then, since T=t, +L2+t3, the period L3 is inevitably determined by setting the period . . . t2.

This lamp lighting device has discharge lamps L14 to L16 each have red, blue, and green emission colors, and these three colors are mixed, and when the multi-axis variable resistor JS is operated, the illumination light is emitted depending on the operating position. The color of can be changed.

In this lamp lighting device, the sum of the duty cycles for lighting each of the discharge lamps L14 to LI8 is always maintained at 1 due to the relationship T:t, +t2+t3, so even if the color of the illumination light is changed, the total luminous flux remains always kept constant. However, this lamp lighting device has the drawback that the color of the illumination light cannot be changed without manually operating the multi-axis variable resistor JS.

[Purpose of the invention]

An object of the present invention is to provide a lamp lighting device that can automatically change the color of illumination light while keeping the luminous flux constant.

[Disclosure of the invention]

The lamp lighting device of the present invention includes a plurality of lamps each emitting light of a different color, and the plurality of lamps are sequentially lit at a predetermined duty cycle for a fixed period of time, and this fixed period is defined as one cycle with a writing cycle of n''. While keeping the sum of duty 1 nicle of the n;I name lamp constant in n; a sequentially repetitive lighting means for repeatedly lighting Jl number of lamps; a first mode for gradually increasing the duty cycle of the plurality of lamps; and a second mode for gradually decreasing the duty cycle for the plurality of lamps. , a device that sequentially and repeatedly controls the duty cycles of the plurality of lamps in three modes, including a third mode that changes the duty cycles of the plurality of lamps so that the sum of the duty cycles of the plurality of lamps is constant; and utility cycle sequential repetition control means.

According to the configuration of the present invention, the first mode gradually increases the duty cycle of a plurality of lamps, the second mode gradually decreases the duty cycle, and the sum of the duty cycles remains constant. In the three modes of the third mode changing the duty cycle to? By sequentially turning on the IB lamps, the ratio of the luminous flux of each lamp to the total luminous flux of the illumination light is gradually changed every cycle, and the light emission of each lamp is controlled while keeping the sum of the luminous flux of each lamp constant. The color of the mixed illumination light can be automatically changed.

Embodiment FIG. 1 is a circuit diagram showing the configuration of a first embodiment of the present invention. The lamp lighting device of this first embodiment includes three discharge lamps L, , L2 connected in parallel and each emitting light of a different color.
．． t, 3, and these three discharge lamps L, , L2. L3 is sequentially turned on at a predetermined duty cycle during a certain period, and the three discharge lamps L, L2 . The three discharge lamps L, , L2 ., while keeping the sum of the duty cycles of L3 constant.
Sequentially repeating lighting means 1 for repeatedly lighting L3; and the three discharge lamps L, , L2 . A first mode in which the duty cycle of L3 is gradually increased, and the three discharge lamps L, , L2 . a second mode of gradually decreasing the duty cycle of L3 and the three discharge lamps L, , L;
2. The three discharge lamps L, , L2 . The three discharge lamps L, , L2 . A duty cycle sequential repetition control means 2 is provided for sequentially and repeatedly controlling the duty cycle of L3.

In this first embodiment, the sequential repeat lighting device l comprises three discharge lamps L, , L2 . A lamp current supply circuit 3 supplies lamp current to L3, and each discharge lamp L, L2 . Switching elements Q, , Q2, . qa and AC current mA C (7) Detect the zero cross point of voltage and change AC? i [
A reset pulse generation circuit 4 that outputs a reset pulse in synchronization with the AC cycle, and each switching element Q, , Q2
The timer circuit 5 sequentially outputs a plurality of timer outputs, each of which turns on G3, and resets the timer output each time the reset pulse is input. Further, the duty cycle sequential repetition control means 2 controls the discharge lamps L, .
2. FR that stores duty cycle data of t, 3
An address counter 9 comprising an OM (programmable read only memory) 6, a pulse generation circuit 7, and a switch circuit 8 for reading the duty cycle data at a predetermined period, and a buffer for the duty cycle data read from the FROM 6. A digital/analog (D/A) converter to inputs the voltage through BF, BF2, converts it into a timer time control voltage of the timer output, and supplies it to the timer circuit 5.
, 1).

The lamp current supply circuit 3 includes an AC power supply AC1 rectifying and smoothing circuit R3, a push-pull inverter IN consisting of transistors Q, Q, an oscillation transformer OT, a choke CH, a capacitor C1, and resistors b'cR1 to R3, and a diode bridge DB. It consists of In this lamp current supply circuit 3, AC power is rectified and smoothed by a rectification and smoothing circuit R3,
to the push-pull inverter IN, and the transistor Q4
．． The oscillation transformer O is activated by the alternating switching operation of Q5.
High frequency power is obtained in the secondary winding of T. The automatic oscillation drive of the transistor Q4°G5 is performed by the voltage between the terminals of the feedback winding of the oscillation transformer O'F. The high frequency power generated in the secondary winding of the oscillation transformer OT is rectified by the diode bridge DB, and is supplied to the discharge lamps L1 to L3 connected in parallel when the switching elements Q1 to Q3 are conductive.

The reset pulse generation circuit 4 includes an AC voltage BAc, a transformer lower two diode bridge DB2. DB3 constant voltage circuit RG
, operational amplifier OP, OP2, amplifier AP, NOR gate G1. Knot gate G2゜G3, capacitor C2~C7
and resistors R4 to R12. This reset pulse generating circuit 4 outputs a reset pulse as shown in FIG. 2(2) at a zero-crossing point of the AC power supply voltage as shown in FIG. 2(fi+). That is, a reset pulse is output from the reset pulse generating circuit 4 to the timer circuit 5 once every half cycle jIIT of the AC power supply voltage.

The timer circuit 5 includes a timer I having two timer outputs.
C (for example, Intasil [CM7556) 12, Noah Gate G4. G5, a knot gate G6°C7, capacitors C8 and C9, and resistors R13 to RI8. The bin configuration of ICI2 for timer is 1. I3-discharge terminal, 2.12-Lβ low value input terminal, 3.1) ili
lI control voltage input terminal, 4, 10-reset pulse input terminal, 5.9-output terminal, 6.8-trigger input terminal, 7-
It serves as a ground terminal and a 14-power terminal. When this timer IC [2] is started by a trigger input, the charging voltage VC of the capacitor C8 and the timer time control voltage vA applied to the No. 3 control voltage input terminal are compared, and the timer output period t1 is set. . That is, as shown in FIG. 2 (3), i; I charging voltage V. is the timer time control voltage v
During the period tl until one loss with A, the first timer output of the No. 5 output terminal applied to the switching element Q1 becomes high level, as shown in FIG. 2 (4). 1st of output terminal 5
When the timer output goes from high level to low level, 8
A trigger signal is applied to the number trigger input terminal. Then, charging of the capacitor C9 is started, and the charging voltage applied to the 12th threshold input terminal is compared with the timer time control voltage V6 applied to the 1) control voltage input terminal,
A period t2 of the second timer output of the No. 9 output terminal given to the switching element Q2 shown in FIG. 2(5) is set. Then, the first timer output of the No. 5 output terminal and the second timer output of the No. 9 output terminal are given to the NOR gate G5, and the output of this NOR gate G5 is transmitted during the period t3 as shown in FIG. 2 (6). The signal becomes high level and is applied to the switching element Q3. Due to this operation, the switching element Q1 operates during the period tI, the switching element Q2 operates during the period L2,
The switching elements Q3 are sequentially turned on during the period t3. Therefore, first the discharge lamp L1 is turned on with a duty cycle t, /T, then the discharge lamp I-2 is turned on with a duty cycle t2/T, and finally the discharge lamp L3 is turned on with a duty cycle L3/T. be done. Such an operation is performed during the period T, and each of the discharge lamps L1 to L3 is repeatedly lit with the period T as one cycle.

PROM6 contains the two timer time control voltages vA mentioned above.
, VB are stored. An address is specified by the count output of the address counter 9, and duty cycle data is read out. The duty cycle data consists of 8 bits, the upper 4 bits of which are given to the buffer BF, and the lower 4 bits of which are given to the pants 7BF2. For example, if the duty cycle data is l100Ilil, 1) 00 is given to buffer BF, and 1) 1
) is given to buffer BF2. Buffer BF.

Is the duty cycle data given to D/A converter 10 based on timer time? ffO voltage ■Converted to 9, 1
r is given to the No. 3 control voltage input terminal, and is applied to the buffer BF.
The duty cycle data given to 2 is converted into a timer time control voltage VB by the D/A converter 1).
is applied to the control voltage input terminal. This number 3 and 1)
Timer time control voltage V given to the number control voltage input terminal
A and V set the periods t1 to t2 of the first and second timer outputs described in 1):1.

The clock generation circuit 7 includes a pulse generation 1c13 (for example, Intersil 1c: M7556) and a capacitor 01.
0""C10, resistors R19 to R21 and variable resistor R2
, and the switch circuit 8 includes switches sw, s
w2, knot gate G8, capacitor CI4. It is composed of C10 and resistors R23 and R24. The bin configuration of the pulse generation 1c13 is similar to the bin configuration of the timer 1012 described above. The No. 5 output terminal of the pulse generating ICl3 and the output terminal of the NOT gate G8 of the switch circuit B8 are connected to the input terminal of the NOR gate G9. The output terminal of the NOR gate G, is the NOT gate G. It is connected to the No. 10 clock input terminal of the address counter 9 via the address counter 9. When switch SW1 is off, variable resistor R2□
tL (a clock signal whose period changes depending on the resistance value) is applied to the 10th clock input terminal of the address counter 9, and a count output that is counted up in synchronization with the clock signal is applied to the PROlv'l 6 as an address. When the switch SW1 is turned on, the clock signal is not input manually, so the count output of the address counter 9 is fixed, and the successive addresses of the PROM 6 are fixed.
Terminal 22 of ROM 6 and 1 of address counter 9
) The output pulse of the No. 9 output terminal of the pulse generation ICl3, which is applied to the No.
The successive address of ROM6 is fixed constant. Duty cycle data is stored at that address so that the duty cycles of the discharge lamps L1 to L3 are uniform, and the illumination light is white for several seconds immediately after the power is turned on.

The switch SW2 is provided to set the upper bits (9 bits or more) of the successive address of the PROM6.

Two sets of duty cycle data are stored in the PROM 6, and the duty cycle data to be read is switched by turning on/off the switch SW2, and the change pattern of the duty cycle is switched.

Next, three modes showing the change pattern of the duty cycle described above will be explained. Is Fig. 3 t1) a number 3 system for timer 1cI2? An example of the timer time control voltage (2)9 applied to the 1lft pressure input terminal is shown, and FIG. 3(2) shows the corresponding timer time control voltage VB applied to the control voltage input terminal 1).

In the period TA, the timer time control voltage vA applied to the No. 3 control voltage input terminal decreases linearly from the maximum value to zero,
1) The timer time control voltage V applied to the control voltage input terminal increases linearly from zero to the maximum value. In period T8, the timer time control voltage vA applied to the No. 3 control voltage input terminal is maintained at zero, and the timer time schedule '421) applied to the No. 1) control voltage input terminal is linearly changed from zero to the maximum value. decrease. Period T. Then, the timer time control voltage vA applied to the No. 3 control voltage input terminal increases from zero to the maximum value, and the timer time control voltage (1) 8 applied to the No. 1 control voltage input terminal is maintained at zero. By operating the switch SW2 of the switch circuit 8 mentioned above, the PROM
By changing the readout 7 dress of 6, Figure 4 (1)
As shown in Figure 4, the timer time control voltage vA applied to the No. 3 control voltage input terminal is changed, and as shown in Figure 4 (2), the timer time control voltage ■8 applied to the No. 1 control voltage input terminal is changed. You can also. By changing the timer time control voltages V, V8 as shown in FIG. 3, the duty cycle of each discharge lamp L1 to L3 can be changed as shown in FIG. 5ill to FIG. 5(3). As shown in Figure 4, the timer time control voltage VB
By changing , the duty cycle can be changed as shown in FIGS. 5(4) to 5(6). In the example shown in FIG. 5(1) to FIG. 5(3), the duty cycle of the discharge lamp L1 is 1 in the period TA.
The duty cycle of the discharge lamp L2 changes in a first mode increasing linearly from 0 to 1, and the duty cycle of the discharge lamp L3 remains at 0. This is the third mode. Period TB
In this case, the duty cycle of the discharge lamp L1 is in the third mode, the duty cycle of the discharge lamp L2 is in the second mode,
The duty cycle of the discharge lamp L3 is in the first mode. Period T. In this case, the duty cycle of the discharge lamp L1 is in the first mode, the discharge lamp L2 is in the third mode, and the duty cycle of the discharge lamp L3 is in the second mode. Here, if the emission color of the discharge lamp L1 is red, the emission color of the discharge lamp L2 is green, and the emission color of the discharge lamp L3 is blue, then the period T
In period A, the color of illumination light changes from red to green, in period TB, the color of illumination light changes from green to blue, and in period T.

The color of the illumination light changes from blue to red. When the switch SW1 of the switch circuit 8 is off, the period TA-period TB-period 1''. is repeated periodically, and the color of the illumination light changes automatically. In the example shown in FIG. 5(4) to FIG. 5(6), each period TA, T8. T.

At the midpoint, the duty cycles of the discharge lamps L1 to L3 become the same and the color of the illumination light becomes white, so the color of the illumination light changes in a pattern of red-white-green-white-blue-white-red. . Each period TA, T8. The color change period of the illumination light, which is the sum total of To, is set by the resistance value of the variable resistor R22 of the pulse generation circuit 7, and is changeable.

The sixth recess is a block diagram showing the configuration of a second embodiment of the present invention. This is an example in which a counter is used instead of a timer circuit that determines the duty cycle. In this second embodiment, the repeating lighting means 1 sequentially and repeatedly lights three discharge lamps L, .
L2. a lamp current supply circuit 3 for supplying lamp current to the lamp current supply circuit 3, and three discharge lamps 7 for the lamp current supply circuit 3;

L2. Three switching elements Q1, Q2, . Q3
, a reset pulse generation circuit 4 that detects the zero-crossing point of the AC power supply voltage and outputs a reset pulse in synchronization with the cycle of the AC power supply voltage, and a clock provided from the clock generation circuit 14 that is sufficiently shorter than the cycle of the AC power supply voltage. a counter 15 which outputs count data at and resets the counting operation by the reset pulse, and compares the count data and duty cycle data and performs each switching operation in a period until the count data matches the duty cycle data. Elements Q,,Q2. The comparison circuit 16 controls the pulse width of the output that makes Q3 conductive. The comparison circuit 16 is composed of two comparators 17 and 18, a NOT gate 19, an AND gate 20, and a NOR gate 21. Further, the duty cycle sequential repetition control means 2 controls the PRO in which the duty cycle data is stored.
M6, and an address counter 9 which reads out the duty cycle data using a clock of a predetermined period given from the pulse generation circuit 7 and supplies it to the comparison circuit.

In this second embodiment, discharge lamps L1 to L3, switching elements QI-Q3, lamp current supply circuit 3, reset pulse generation circuit 4, PROM 6, pulse generation circuit 7
The components of the address counter 9 can be the same as those in the first embodiment described above.

The operation of this second embodiment will be explained with reference to the timing chart of FIG. 7+1.1 shows the AC 2It power supply voltage ■ and the reset pulse RP which is the output of the reset pulse generation circuit 4, FIG. 7(2) shows the output signal CS of the comparator 17, and FIG. 3) shows the output signal C32 of the comparator 18, FIG. 7(4) shows the output signal AS of the AND gate 20, FIG. 7(5) shows the output signal NS of the NOR gate 21, and FIG. 6) shows the count output CT of the counter 15, the upper 4 bit duty cycle data value UD of the PROM 6, and the lower 4 bit duty cycle data DD. As shown in FIG. 7 (1), when a zero-cross point is detected at the AC power supply voltage ■, the reset pulse generation circuit 4 sends a reset pulse R to the counter
P is output and the counter 15 is output as shown in FIG. 7(6).
makes a counting motion. The count output CT of the counter 15 is compared with the upper bit duty cycle data value UD and the lower bit duty cycle data value DD of the PROM 6 by a comparator 17.18. The output signals cs, cs2 of the comparators 17, 18 shown in FIG. 7(2) and FIG. 7(3) are generated until the count output CT loses once to the duty cycle data values UD and DD, respectively. Each period 1. , 12, the level is high. Therefore, the discharge lamp L is lit during the period L1, and the discharge lamp L2 is lit during the period L2. Comparator 1
7. When the output signals cs, , cs2 of 18 both become low level, the NOR gate NS is activated until the count output CT of the counter 15 is reset in half cycle T of the AC power supply voltage ■.
The output signal becomes high level, and the discharge lamp L3 lights up.

In this second embodiment as well, the duty cycle data values UD and DD read out from the PROM 6 gradually change due to the counting operation of the address counter 9, and the duty cycles of each discharge lamp 1 to L3 keep the sum constant. However, the color of the illumination light changes automatically as the light changes.

FIG. 8 is a circuit diagram showing the configuration of a third embodiment of the present invention. In this third embodiment, the repeating lighting means 1 sequentially and repeatedly lights three discharge lamps L, L2 . Lamp TL/! that supplies lamp current to L3! L supply circuit 3 and three discharge lamps L, L2 . 3 connected in series to +-3 respectively to conduct/cut off the lamp current.
switching elements Q, ,Q2. Q3, a reset pulse generation circuit 22 that outputs seven pulses once per mode switching period, and three discharge lamps L, , L2 . With the duty cycle of L3, each of the switching elements Q, , Q2
．． The timer circuit 23 sequentially derives a plurality of timer outputs that respectively conduct G3 and resets the timer outputs when the reset pulse is input. Further, the duty cycle sequential repetition control means 2 controls the timer circuit 23.
It consists of a multi-axis variable resistor 24 that changes the timer output period, and a motor 25 that periodically operates this multi-axis variable resistor 24.

This third embodiment is based on the proposed example shown in FIG.
5. That is, in this third embodiment, the reset pulse generating circuit 22 is a monostable multi-by-break MV, a NOR gate CII.

G12, capacitor Cl1l to CI8, resistor RZS+
R14 and variable resistor R1ff, the timer circuit 23 includes monostable multi-vibration circuits Mv2 to Mv4 and capacitors CI9 to C! + and a resistor Rz e -R33. Note that the lamp current supply circuit 3 has a common configuration in the proposed example and the above-described embodiments.

In this third embodiment, the multi-axis variable resistor 24 is automatically operated by a motor 25 in order to solve the problems of the proposed example. FIG. 9 shows the configuration of the multi-axis variable resistor 24, and by operating the operating rod 24a of the multi-axis variable resistor 24 in the direction of the arrow, the resistance values of the variable resistors R34 and R3s change. The duty cycle of each discharge lamp L1-L3 changes. When the operating rod 24a is in position ■, the resistance values of variable resistors R34 and R3S are both small, and when it is in position ■, the resistance value of variable resistor R34 is small and the resistance value of variable resistor R3 is small.
When the resistance value of S is large and in position ■, the variable resistor R
34 is large and the resistance value of variable resistor R3% is small. Therefore, in this embodiment as well, by driving the operating rod 24a with the motor 25 so that the position automatically changes from ■→■→■-■ as shown in FIG. 10, the luminous flux of the entire illumination light does not change. The color of the illumination light can be changed automatically. Furthermore, in this embodiment, the color change pattern of the illumination light can be changed by changing the connection state between the motor 25 and the operating rod 24a, changing the rotation diameter of the operating rod 24a, the resistance characteristics of the resistors R34, R3, etc. You can also do it.

In the above embodiment, a configuration is shown in which three discharge lamps L and -L3 are provided, but in this invention, the duty cycle of each of three or more discharge lamps can be automatically adjusted without changing the overall luminous flux. Of course, it is possible to change it. Figure 1) shows an example of changing the duty cycles of four discharge lamps. During the period in which the duty cycle of the first discharge lamp increases linearly from O to 1 as shown in Figure 1)+, the duty cycles of the second and third discharge lamps increase linearly from O to 1 as shown in Figure 1I) 2) and 1) is maintained at 0 as shown in Figure (3) and the duty cycle of the 4th discharge lamp is decreased linearly from 1 to 0 as shown in Figure 1) (4). . In one period, one of the four discharge lamp duty cycles is linearly increased from 0 to 1, the other is linearly decreased from 1 to 0, and the other two are maintained at 0. By performing such control, it becomes possible to sequentially change the color of the illumination light among four colors.

Further, in the above embodiments, discharge lamps L1 to L are used as lamps.
3 was used, however, an incandescent lamp may be used in this invention.

〔Effect of the invention〕

According to the lamp lighting device of the present invention, each lamp is sequentially and repeatedly lit in three modes: the first mode, the second mode, and the third mode so that the sum of the duty cycles of the plurality of lamps is constant. The ratio of the luminous flux of each lamp to the total luminous flux of the illumination light is gradually changed every cycle, and the color of the illumination light is automatically created by mixing the luminous colors of each lamp while keeping the sum of the luminous flux of each lamp constant. It is also possible to change the color change pattern of the illumination light by changing the change pattern of the duty cycle, so it is possible to widen the range of production effects by changing the color of the illumination light.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing the configuration of a first embodiment of the present invention;
FIG. 2 is a timing chart for explaining the operation of the first embodiment, FIGS. 3 and 4 are waveform diagrams showing an example of a change pattern of the timer time control voltage, and FIG. 5 is a diagram showing the duty of each discharge lamp. A waveform diagram showing the cycle change pattern,
FIG. 6 is a block diagram showing the configuration of the second embodiment, FIG. 7 is a timing chart for explaining the operation of the second embodiment, FIG. 8 is a circuit diagram showing the configuration of the third embodiment, and FIG. The figure is a perspective view showing the configuration of the multi-axis variable resistor, Figure 1O is a diagram showing the operation of the operating rod of the multi-axis variable resistor, and Figure 1) is a waveform showing the change pattern of the duty cycle of the four lamps. figure,
Figure 12 is a circuit diagram showing the configuration of the conventional example, Figure 13 is a diagram showing changes in the luminous flux of each lamp in the conventional example, Figure 14 is a circuit diagram showing the configuration of the proposed example, and Figure 15 is the circuit diagram of the proposed example. It is a timing chart for explaining the operation. l... Sequentially repeating lighting means, 2... Duty cycle sequentially repeating control means, 3... Lamp current supply means, 4
...Reset pulse generation circuit, 5...Timer circuit,
6...PROM, 9...Address counter, 10.
1)...D/A converter, 15...Counter, 16...
... Comparison circuit, 22... Reset pulse generation time ga,
23...Timer circuit, 24...Multi-axis variable resistor, 2
5...Motor, L1-L3...Emission Tt lamp, Q1
~Q3...Switching element Fig. 2 Fig. 3 Fig. 9 Fig. 10 ^ ^ ^ Go to
To 62 -〇N-〜ノ Nノ -ノ -ノ
.

Claims (5)

[Claims] (1) A plurality of lamps each emitting light of a different color, and the plurality of lamps are sequentially lit at a predetermined duty cycle during a certain period of time, and the sum of the duty cycles of the lamps in each period is calculated, with this certain period as one cycle. sequentially repeating lighting means for repeatedly lighting the plurality of lamps while maintaining the same; a first mode for gradually increasing the duty cycle of the plurality of lamps; and a first mode for gradually decreasing the duty cycle of the plurality of lamps. a duty cycle in which the duty cycles of the plurality of lamps are sequentially and repeatedly controlled in three modes: 2 modes and a third mode in which the duty cycles of the plurality of lamps are changed so that the sum of the duty cycles of the plurality of lamps is constant; A lamp lighting device comprising cycle sequential repetition control means. (2) The first mode changes the duty cycle from 0 to 1.
, wherein the second mode linearly decreases the duty cycle from 1 to 0, and the third mode maintains the duty cycle at 0. The lamp lighting device according to paragraph (1). (3) The sequential repetitive lighting means includes a lamp current supply circuit that supplies lamp current to the plurality of lamps, and a lamp current supply circuit that is connected in series to each of the plurality of lamps to conduct the lamp current. a plurality of switching elements to be cut off, a reset pulse generation circuit that detects a zero-crossing point of the AC power supply voltage and outputs a reset pulse in synchronization with the cycle of the AC power supply voltage, and a plurality of timer outputs that respectively conduct the respective switching elements. and a timer circuit that sequentially conducts a plurality of lamps and resets the timer output each time the reset pulse is input, and the duty cycle sequential repetition control means includes a memory storing duty cycle data of the plurality of lamps, and a timer circuit that resets the timer output each time the reset pulse is input. A patent comprising: an address counter for reading the duty cycle data in cycles; and a digital/analog converter that converts the duty cycle data read from the memory into a timer time control voltage of the timer output and supplies it to the timer circuit. A lamp lighting device according to claim (1). (4) a lamp current supply circuit in which the sequential repetitive lighting means supplies lamp current to the plurality of lamps, and a lamp current supply circuit connected in series to the plurality of lamps to conduct/cut off the lamp current; a reset pulse generation circuit that detects the zero-crossing point of the AC power supply voltage and outputs a reset pulse in synchronization with the cycle of the AC power supply voltage; and a counter that resets the counting operation with the reset pulse, and a pulse width of an output that compares the count data with a duty cycle and conducts each of the switching elements during a period in which the count data matches the duty cycle data. and a comparison circuit for controlling the duty cycle, and the duty cycle sequential repetition control means reads the duty cycle data from a memory storing duty cycle data of the plurality of lamps and an address counter that reads out the duty cycle data at a predetermined period and supplies it to the comparison circuit. A lamp lighting device according to claim (1). (5) The sequentially repetitive lighting means includes a lamp current supply circuit that supplies lamp current to the plurality of lamps, and a lamp current supply circuit that is connected in series to each of the plurality of lamps to conduct the lamp current. A plurality of switching elements to be cut off, a reset pulse generation circuit that outputs a reset pulse once in one cycle, and a plurality of timer outputs that respectively conduct each of the switching elements according to the duty cycle of the plurality of lamps are sequentially derived. and a timer circuit that resets the timer output when a reset pulse is input, and the duty cycle sequential repetition control means includes a multi-axis variable resistor that changes the timer output period of the timer circuit, and the multi-axis variable resistor. A lamp lighting device according to claim 1, comprising a motor for periodically operating a lamp.