JPS59130095A - Device 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 discharge lamp lighting device d that employs a high-frequency lighting method, and is an infrared remote control device (hereinafter referred to as an original remote control) that is widely used in household electric appliances, etc. This provides a 1# configuration that prevents malfunctions.

Recently, as shown in Fig. 1, a high frequency generating circuit 2 such as an inverter is connected to both ends of a DC power supply 10, and a radiator lamp 8 such as a fluorescent lamp is connected to the output side of the high frequency generating circuit 2. Lighting devices are becoming popular in general households. In such a device, due to the afterglow characteristics of the phosphor of the lamp 3, as shown in FIG. 2, a light output in which a high frequency light output ΦHF is superimposed on a light output ΦlG equivalent to direct current lighting is obtained, resulting in efficient lighting. is obtained.

However, since the optical output ΦHF is an output whose main component is a frequency 2ω which is twice the soot lamp frequency ω, an optical remote control that sends a signal with a carrier wave equal to 2ω can be used in lighting equipment that incorporates the above device. When used below, the receiving section of the optical remote control may not be able to distinguish between the original signal and the optical output ΦHP, resulting in malfunction.

This phenomenon is particularly noticeable when the above lighting device is used as an indoor lighting fixture and a TV using an optical remote control is used in the same room.
The BF also had a level twice as many as the number of devices, and a problem arose in that the optical remote control was completely useless.

The present invention has been made in view of the above drawbacks, and in a lighting device for multiple lights with high frequency 5 (high frequency 5) (two or more lights), the high frequency component output ΦHF included in the optical output is compensated for each lamp, and Spectral output Φ1 (the amplitude of FO is reduced).

That is, the inventor believes that the cause of the malfunction of the optical remote control is the optical output ΦU.
Considering that the problem is not due to the existence of This provides a lighting device.

The present invention will be explained below based on embodiments shown in the figures.

Figure 8 is a circuit diagram for purposes of explaining the embodiment, in which discharge lamps 8A and 8B such as fluorescent lamps are installed at both ends of a DC power supply (a rectified power supply made by pulsating an AC power supply is also acceptable) 1 and on the output side. A high frequency generation circuit section 2A each having a.

2B to form high frequency lighting parts A and B, and discharge lamp 8
A and 8B are illuminated at a high frequency, for example, at a distance of several thousand meters. And each high frequency generation circuit section 2A.

2B have the same frequency and a constant phase shift.
Oscillation outputs are supplied to the discharge lamps 8A and 8B in response to the oscillation signals @SA and SB as shown in b). As a concrete circuit for obtaining the same oscillation frequency with a predetermined phase shift, for example, a control circuit is formed by a simple combination of logic elements, and two outputs of this control circuit are connected to each high frequency generation circuit section (for example, a separately excited inverter) 2A, Since this can be realized as appropriate by using it as a control signal for 2B, it is omitted in FIG.

In this way, the discharge lamps 3A and 3B are connected to the oscillation signal SA.

When lit with high frequency output according to SB, Figure 4 (b),
As shown in (c), the light output Φ of each discharge lamp 3A and 8B
A.

If ΦB are out of phase with each other by a certain amount, one optical output (J
) The peak value of A is located in the valley area TV of the other light output ΦB, and the outputs complement each other, and the discharge lamps 8A and 8B
The combined output is the optical output of the high-rise wave Φ
It was confirmed that I (Fo swing 1) became very small, and the optical remote control's spurt operation became very small.

However, even if the oscillation signal strings and SB of each high-frequency generation circuit section 2A and 2B are set to different frequencies as shown in FIG. 5(a), the synthesized high-frequency optical output Φ
The amplitude of HFQ was sufficiently smaller than the high frequency optical output ΦHF when the discharge lamps 8A and 8B were individually lit, and malfunctions of the optical remote control system could be prevented.

Note that the present invention is not limited to one lamp for two lamps, but for eight lamps.
Of course, it can be applied to more than just electric discharge lamps, but if the oscillation conditions are set for each even number of lamps as in each of the above embodiments, it is more effective in preventing malfunctions, and it is also possible to house each discharge lamp in the same lighting equipment. If this is done, it is possible to further suppress the influence of the individual high power of each discharge lamp on the optical remote controller, and further prevent malfunctions can be expected. Of course, the discharge lamp is not limited to a fluorescent lamp.

As described above, since the present invention locates the peak value in each half cycle of the high-frequency output waveform at the phase of the trough rM] region of the other high-frequency output waveform, the discharge lamps are able to compensate each other for their light outputs. The amplitude of the synthesized high-frequency optical output component was made extremely small, and a lamp device with a simple configuration was obtained that could prevent malfunctions of the optical remote control.

[Brief explanation of drawings]

Figure 1 is a conventional circuit diagram, Figure 2 is an optical output waveform diagram of the same as above, and Figure 1 is a professional circuit diagram showing an embodiment of the present invention.
FIG. 4 is a waveform diagram of the same as above, and FIG. 51 is a waveform diagram of another implementation of the present invention (4L, which is not explained. 1... DC power supply, 2... High frequency generation circuit section, 8...
・Discharge lamp. 9111 Hsu Hanho (1 person) Patent attorney representing Matsushita Electric Works Co., Ltd. Toshimaru Takemoto (and 2 others)

Claims (1)

[Claims] il+ In a discharge lamp lighting device having a plurality of crystal frequency lighting sections each formed of a discharge lamp and a high frequency generation circuit section that supplies a high frequency output to the discharge lamp, at least one
A discharge lamp lighting device ff, characterized in that the high frequency output of a fifth frequency generating circuit section is set so that each half-cycle peak value phase of the output waveform is in the valley region of the high frequency output waveforms of other high frequency generating circuit sections.