JPS60235399A - Devide for firing discharge lamp - 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 lamp circuit for a discharge lamp that has a plurality of discharge paths and sequentially switches the discharge paths to achieve one function.

(Background Art) The inventor of the present invention previously proposed the above-mentioned discharge lamp (Japanese Patent Application No. 131593/1982). FIG. 1 shows an example of such a discharge lamp. In the discharge space airtightly formed by ν1 and Sdem 2, there is a fluorescent lamp which is bent in a U-shape and has red, green, and blue luminescence on its inner surface. Three inner tubes 3R and 3G coated with light material.

One end of each of the inner tubes 3R, 3G, and 3B is airtightly fixed to the anode 4 by Gauss welding, and the other end is a cathode 5 coated with an electron radioactive substance.
It opens near the. In addition, several Torr is inside the outer tube 1.
of rare gas and a small amount of mercury.

FIG. 2 is a circuit diagram showing the basic configuration for lighting such a discharge lamp, including a DC power supply Vs, a discharge path changeover switch Sv
, the discharge lamp FL and the current-limiting resistor R close the opening 1a and the emptiness 14.
By controlling the arcs 93R, 3G, and 3B, the emission color is controlled by changing the mutual emission time ratio. For example, as shown in Figure 3, IQ nls
Three arc tubes, red, green, and
Inner tube 3R that emits blue light.

By dividing the light emitting period into 3G and 3B and changing the mutual ratio, each arc tube appears to emit light at the same time with the intensity of the set ratio. If set like this, each light will emit white, yellow, and purple light, allowing for variable color control.

However, such discharge lamps and lamp devices have the following problems.

■ Starting with Hou'Kameto! A very large power supply voltage is required to increase the power supply voltage.

■ By switching and controlling three arc tubes, uJ
Although it is possible to emit monochrome light, it is not easy to adjust the brightness (luminous flux) IA.

(Object of the Invention) The present invention has been made in view of the above points, and its object is to provide a discharge lamp lighting device that sequentially switches a plurality of discharge paths to light the discharge lamp, and to control the starting and dimming of the discharge lamp. Therefore, it is necessary to provide a discharge lamp and a hanging lamp device that have less influence on lamp life, efficiency, etc., and can be realized at low cost.

(Disclosure of the Invention) Figure 4 shows the basic configuration of the present invention.
- Discharge path switching switch Sv - Inductance and resistance R
- A first closed circuit formed by a DC power source Vg and a DC power source v
1 - A resistor for adjusting thermal current r (a zero-temperature good no-start switch sT - a second closed circuit formed by the cathode 5 of the lamp FL - an inductance L - a resistor R - a DC power supply Vs) .

FIG. 5 shows an embodiment of the present invention, #rl]fc
! Set the open selector switch SW to just 3 transistors.
rl, Tr2. Tr, and one transistor Tr, each transistor Tr, , 'I''r2, Tr, ,
Tr is controlled by a control circuit C. In addition, the power supply v8 is composed of a series power supply of six control sources Vs+ and a main circuit power supply V, and 'tFL The magnitude of the applied voltage u'i
It is set to 1.5 to 2 times the voltage.

Next, the operation related to the gun described above will be explained in detail with reference to the time charts shown in FIGS. 6 and 7.

FIG. 6 shows the operation at the time of starting. After the power is turned on at time 0, each transistor Tr1. T
r2 and 'I'r3 can be sequentially turned on and off at a given light emitting period ratio (in the figure, the ratios are the same). Furthermore, the transistor Tr4 turns on the VC almost at the same time as the power is turned on, and preheats the cathode filament 5 in the second closed circuit described above. Filament pre-order! ! ! 8th brother r
After (approximately 1 second), the transistor Tr4 is turned off at time (1). At the same time, a kick and pressure is generated from the inductance L, and the discharge path switching transistor that was in the on state at that time (in the case of the same figure) , transistor Tr+) connected to the arc tube (tif, in the case of Figure 5, red f!3
Discharge starts at the inner luminous tube 3R).

From time 2 to time 3, red and green light is emitted alternately, and the mixed color is yellow. After time Ls, although red and green are mixed as in 1iJ, each light emission period is half of that at time [2 to [3], and another reason 11U is to guide transistor Pr4 to f city. to preheat filament 5. In other words, the color of the emitted light is kept almost the same.
(In the previous example, the luminous IF (luminous flux) was almost halved, and the average value decreased. The filament temperature decrease due to the ?i' current (tli current of all three arc tubes) was reduced by the filament's electric heat passing through the filament of rlfl at the beginning of one luminous body. Compensate with.

In this way, in this embodiment, the brightness control as well as the chromaticity control is performed by controlling each transistor Tr, Trz, Tr
3. This can be done by turning on/off control of Tr4. In addition, the transistor Tr4i has the starter function as described above, and there is no need to add any new parts to the main circuit.

Furthermore, since it compensates for the decrease in filament temperature due to the decrease in π current, it also has the advantage of maintaining good lifespan and operational stability.

(Effects of the Invention) The present invention provides a discharge lamp having a successive discharge path which is connected in series through a 4M source VC discharge path, such as F1,
Sequential release using the above discharge path selection switch? In a discharge lamp lighting device that lights by switching the L path, a current-limiting impedance connected in series to the above power source is configured with an inductance and a resistor, and a start switch is provided to be connected in series to the above power source, and a 6-source start switch is provided. A switch and a flashing light?
[Construct a closed circuit consisting of a polar filament and a current-limiting impedance, and after turning on the power, turn on and off the above-mentioned branch switch in sequence at the desired light emission period ratio, and turn on the above-mentioned start switch for a predetermined period of time.] , predetermined period 1,
After la, by turning on the discharge path selector switch only during the OFF period, the power source /
It can be started easily with Li pressure, and a dimming function can be added. In addition, a single start switch can be used for both starting and dimming, and can be controlled in the same manner as the radiator/L path changeover switch, thereby simplifying the circuit configuration and reducing costs.

Furthermore, during dimming, the filament is pre-heated without using a new filament pre-heater as in the past, so the circuit configuration can be made smaller and there is no sudden impact on the lifespan or operation.

[Brief explanation of the drawing]

@1 and 'l show an example of the discharge lamp according to the present invention, where lal is a perspective view and lbl is a plan view. FIG. 2 is a circuit diagram showing the basic configuration of the lamp for lighting the discharge lamp, and FIG. 3 is a time chart showing the operating state of the lighting circuit.
FIG. 4 is a circuit diagram showing the basic configuration of the present invention, FIG. 5 is a circuit diagram showing an example of the present invention, and FIGS. This is a time chart. Vs...power supply, Sw...discharge path selection switch, ST
...Start switch, 1"L...Acid release, R...
Resistance, L...Inductance. Patent Applicant: Matsushita Tsuko Co., Ltd., 71st Misakijinzuf Konshitake) C1 Masamaru (and 26 others) Figure 1 → Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Procedure amendment Written by the Commissioner of the Japan Patent Office on July 16, 1982, 2. Title of the invention: Discharge lamp lighting device 3. Relationship with the case of the person making the amendment. Patent applicant address: 1048 Kadoma, Kadoma City, Osaka Prefecture.
583) Matsushita Electric Works Co., Ltd. Representative: Iku Kobayashi 4, Agent Address: 1048-6 Kadoma, Kadoma City, Osaka Prefecture, hl
+ Positive subject specification (inclusion of amendments) (1) The scope of claims column of the specification is amended as follows. (1) In a discharge lamp lighting device comprising a discharge lamp having a plurality of discharge paths connected in parallel to a power source via a discharge path changeover switch, the discharge lamp is lit by sequentially switching the discharge paths with the single path changeover switch.゛A start switch connected outside of series to the power supply is provided, and a closed circuit consisting of the power supply, the start switch, the m-pole filament of one discharge light, and the current limiting impedance is constructed, and after the source is turned on, the discharge path changeover switch The discharge lamp lighting device is characterized in that the start switch is turned on and turned off sequentially at an arbitrary light emission period ratio, the start switch is turned on for a predetermined period, and after the predetermined period has elapsed, the discharge road changeover switch is turned on only during the off period.

Claims (1)

[Claims] A discharge lamp comprising a discharge lamp having a plurality of discharge paths connected in series with a source 111 through a discharge path changeover switch, which is lit by sequentially switching the discharge paths to 1 with the discharge path changeover switch. In the lamp lighting device, the current limiting impedance connected in the i-th row of the power source K is configured by an inductance and a resistor,
Connect the above in series to the source. Construct a closed circuit consisting of the Nistart switch, the discharge lamp's electrode filament, and the current-limiting impedance, and!
After turning on the power, turn on and off the discharge path selector switch in sequence at an arbitrary light emission period ratio, and turn on the start switch.
,. This discharge lamp lighting device is patented in that the switch is turned on for a predetermined period of time, and after the elapse of the predetermined period, the discharge path changeover switch is turned on only during the off period.