JPS5894090A - Control device for light emitting tube - 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 The present invention relates to a control device for a luminescent tube in which a plurality of light bulbs are housed in a transparent or translucent tube body, and for blinking each of the bulbs in a predetermined order. It is.

Luminescent tubes are used, for example, during nighttime construction work to notify passersby of the location of a construction site to ensure safety, or are used for decoration in various displays.

In this case, as a means for blinking each light bulb, a direct current drive blinking method using a thyristor has conventionally been used. This method required a 100 volt DC power source, was dangerous, and had the disadvantage that the control device was bulky and inconvenient to carry.

This invention was made to eliminate the above-mentioned drawbacks, and uses an alternating current driving method to blink a light bulb, and a control for a luminescent tube that uses a new light modulation method to prevent rush current from flowing. The purpose is to provide a device. This invention will be explained below.

FIG. 1 is an overall perspective view showing an embodiment of the present invention. In this figure, reference numeral 10 denotes a light emitting tube, which is transparent or semi-transparent, and has a bellows type structure with irregularities t on the outside to make it flexible. Inside the tube body 11, a large number of light bulbs are arranged at required intervals in length. It is accommodated in the direction. In this embodiment, the light bulbs are divided into 'kiIIp', and the light bulb tLA belongs to one group.

The bulb belonging to the other group is shown as vLA.

Each light bulb LA,, LA! are connected in parallel in each group by conducting wires 12, and the required blinking is performed under the control of the control device 20 as described later.

FIG. 2 shows a circuit diagram of the embodiment shown in FIG. In this figure, 10 is a luminescent tube, LAl.

LA is a light bulb, 20 is a control device, the same as #1 @
The details of the control device 20 will be explained below. E is an alternating current power source, which is usually obtained by plugging it into a commercial power outlet. Lc is the noise prevention coil of the common panel, FX, F is the noise prevention coil connected to the fuse, LIILl & back front light bulb LA11LA,
D,,D,is triac,Dl,D,is diac,
R,, R, are semi-fixed resistors, R,, R, are resistors, C,
, C, is a capacitor. And a semi-fixed resistor R,
, R, and capacitor C3 constitute a phase control circuit PC. FF is a clip-flop circuit, with diode D
,,D, ,Resistor R2~R electrolytic type capacitor C1,
C, and a transistor Qs=Q-.

TR is a transformer, BR is a full flow glitch, and C1 is a smoothing capacitor.

Next, the operation will be explained.

When the AC power supply E is turned on, the output of the full-wave rectifier bridge BR is smoothed by the capacitor C3 and becomes a DC voltage.

Then, it is supplied to flip-flop circuit FF.

Now, assuming that the transistor Q1 of the flip-flop circuit FF is on and the transistor Q is off, the gate current of the triac 01 changes from 0° gate to 0. →R1
→Qs→minus (-)K flows, triac D1 turns on, and as a result, the AC load current cuff, E 0 Lc4
+ Fl-m L Alm L, →0. NakaLe 40
Since the signal E flows, the light bulb LA lights up.

On the other hand, the off-side diode D is the electrolytic capacitor C4
, reverse biased through resistor R1 and triac O
1 gate, the flip-flop circuit FF is irrelevant. At this time, the gate current of triac D is a semi-fixed resistance! The conduction angle becomes proportional to the time constant of the phase control circuit PC consisting of RatRs and the capacitor C3, the triac O2 conducts for this time, and the light bulb LA lights up dimly.

Next, when the transistor Q1 is turned off and the transistor Q2 is turned on, the light bulb LA! lights up brightly, and light bulb LA lights up dimly.

゛In the above manner, 1 group of light bulbs LA, and 11 I
P's light bulb LA and are alternately brightly lit and faintly lit k<9
return. That is, the light bulbs LA and LA will undergo light modulation. Therefore, by changing one period of the oscillation waveform of the flip-flop circuit FF, the corresponding optical modulation can be provided.

Note that in the above embodiment, the light bulb LA1. ．． LA! The output of the flip-flop circuit FF was divided into two groups, and the output of the flip-flop circuit FF was alternately applied to the triacs D, D, to cause so-called alternating blinking.
It goes without saying that the number of groups of light bulbs may be further increased by increasing the number of Ft'a stages. Furthermore, it goes without saying that the gate elements are not limited to the triacs D, , D, and other gate elements may be used.

As explained in detail above, the present invention uses an AC power source as a control device for a luminescent tube, and connects each bulb t'1fFr divided into a required number of groups to the AC power source via a gate element, Since the output of the oscillation circuit is added to the sequential gate element that opens and closes, the AC power supply can be used as is without being transformed, so the control device can be made extremely compact, and the on-site wiring is much smaller than with DC. It is safe. Furthermore, if the gate element is equipped with a phase control circuit, it is possible to keep the light bulbs dimly lit when they are off, and not only can rush current be prevented when the light bulbs are turned on, but also the spacing between the bulbs in the light emitting tube can be increased. However, similar precautions can be taken.

As described above, the present invention has the advantage that the light emitting tube can be controlled with an extremely simple configuration. .

[Brief explanation of drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention;
No. 211 is a circuit diagram of the embodiment shown in FIG. In the figure, 10 is a light emitting tube, 111 is a tube body, 12 is
is a conductor, 20 is a control device, E is an AC power supply, LA, , LA
, is a light bulb, 0. ．． 0. is a triac, D, , D is a diac, R,, R, are semi-fixed resistors, R3-R1 are resistors, %CI to C5 are capacitors, 0, . 0. is a diode, PC is a phase control circuit, TR is a transformer, and BR is a full-wave rectifier bridge.

Claims (1)

[Claims] In a control device for blinking each of the light bulbs at a predetermined period for each group of a light emitting tube which is formed by accommodating a plurality of light bulbs divided into a required number of groups in a transparent tube body of 11'&1, An oscillation circuit was provided which connects each group to an AC power source via a gate element, oscillates at a predetermined period, and sequentially applies the output to each gate element to make it conductive.'41:I! ! 1IIIk control device for a luminescent tube. .