JPH11111486A - Discharge lamp lighting device and lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge lamp lighting device capable of eliminating or reducing the deterioration of efficiency, and flickering of light as inputting a phase control voltage so as to dimming light on. SOLUTION: The output voltage of a rectifying device 5 is converted into a smoothed DC voltage by a smoothing DC conversion portion 6. The smoothed DC voltage is inverted into a high frequency AC power having a smoothed DC voltage envelope by an inverter portion 7, and is applied to a fluorescent lamp 8. The fluorescent lamp 8 is continuously lighted on. A detection means 9 detects the conduction angle of a phase control voltage, the output of an oscillation control portion 72 is controlled by a signal in response to the conduction angle, and the high frequency output of a high frequency generation device 2 is changed. Thereby, the fluorescent lamp 8 is dimming lighted on in response to the phase angle of the phase control voltage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp lighting device and an illuminating device capable of dimming and lighting a discharge lamp according to a phase control voltage.

[0002]

2. Description of the Related Art Conventionally, this kind of apparatus has been disclosed in Japanese Patent Publication No. 3-30.
No. 278 has been proposed. In order to dimm the lighting of the discharge lamp together with the incandescent lamp, the phase is controlled so that both ends are cut off, leaving the peak of the sine wave voltage,
This phase-controlled voltage is converted into a high-frequency voltage to energize each lamp. In the case of a discharge lamp, since a high frequency voltage having an envelope having a waveform having a peak portion is applied to the discharge lamp, dimming can be performed relatively deeply without extinguishing the discharge.

[0003]

In the prior art, deep dimming lighting is possible, but the lighting is turned off every half cycle of the AC voltage, that is, it is turned off every half cycle of the AC voltage. Since re-ignition is repeated, electric power is consumed for re-ignition, and there is a problem that efficiency is correspondingly low.

[0004] In addition, since turning on and off is repeated every half cycle of the AC voltage, flickering of light becomes a problem depending on the use environment.

Further, in a lighting device such as a bulb-type fluorescent lamp in which amalgam for controlling mercury vapor pressure is sealed and the fluorescent lamp is covered with a translucent cover, the lighting device is repeatedly turned on and off as in the prior art. In this case, there is a problem that the rise in the temperature inside the bulb becomes slow, and the rise of the light output is slow and the light output is not stabilized, especially immediately after lighting or in a low-temperature atmosphere.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a discharge lamp lighting device capable of eliminating or reducing the problems of reduced efficiency and light flicker while performing dimming lighting by inputting a phase control voltage.

Another object of the present invention is to provide an illuminating device capable of quickly raising the light output even when a fluorescent lamp in which amalgam for controlling mercury vapor pressure is enclosed is housed in an envelope. Aim.

In addition, while dimming and lighting can be performed by inputting a phase control voltage, the problems of reduced efficiency and flickering of light can be eliminated or reduced, and amalgam for controlling mercury vapor pressure is enclosed in an envelope. Even if the lamp is stored,
It is an object of the present invention to provide a lighting device that can start light output at an early stage.

[0009]

According to the present invention, there is provided a discharge lamp lighting device for detecting a conduction angle of an input phase control voltage; and converting the input phase control voltage into a smoothed DC voltage. An output-controllable high-frequency generator that converts the smoothed DC voltage to a high-frequency voltage to energize the discharge lamp, and changes the energization power of the discharge lamp in accordance with a signal indicating the conduction angle from the detection means; It is characterized by having.

In the first and the following inventions, unless otherwise specified, the high frequency generator may be of any type as long as its output can be changed. For example, a self-excited or separately-excited inverter can be mainly configured. As means for changing the output, for example, one that changes the switching frequency when having a resonance circuit, one that changes the switching frequency when it has a reactance element as the source element of the discharge lamp, one that combines them, one-wheel inverter In such a case, a device that changes the on-duty of the switching device can be appropriately selected.

Means for converting the input voltage into a smoothed DC voltage in the high-frequency generator include a device using a smoothing capacitor, a device using an active filter composed of a step-up chopper, and a device which is charged to a voltage lower than the peak value of the input voltage and self-charges. A device using a partial smoothing circuit that discharges during the period when the input voltage is lower than the voltage of the above-mentioned voltage can be appropriately selected. However, in order not to lower the input power factor of an input power supply (a power supply that outputs an AC voltage whose phase is controlled, for example, a commercial power supply), it is preferable to use an active filter, a partial smoothing circuit, and the like instead of using only a smoothing capacitor. preferable.

According to the present invention, the input phase control voltage is converted into a smoothed DC voltage, which is converted into a high-frequency voltage to energize the discharge lamp. Thus, the lamp is substantially (without reignition every half cycle of the AC voltage as in the prior art)
Lights continuously. As a result, there is substantially no power consumption for restriking and there is no flickering of the light output. Further, the energizing power of the discharge lamp changes according to the conduction angle of the phase control voltage. That is, if the conduction angle is small (the conduction period is large), the energizing power is changed so that the light output of the discharge lamp is large, and if the conduction angle is large (the conduction period is small), the light output of the discharge lamp is small. To change the energizing power.

A discharge lamp lighting device according to a second aspect of the present invention is a phase control device for controlling the phase of an AC voltage; a detecting means for detecting a conduction angle from the phase-controlled AC voltage or the rectified DC voltage; An output-controllable high-frequency generator that converts a phase control voltage into a smoothed DC voltage, converts the smoothed DC voltage into a high-frequency voltage, and outputs the output, and changes the output in accordance with a signal indicating a conduction angle from a detection unit. And a discharge lamp energized by the output of the high-frequency generator.

The invention described in this claim operates in the same manner as the invention described in claim 1.

A lighting device according to a third aspect of the present invention includes an envelope having a base at one end and a translucent cover at the other end; amalgam for controlling mercury vapor pressure; A fluorescent lamp housed opposite to the cover; a light detecting means provided in the envelope for detecting the light output of the fluorescent lamp; a high frequency provided relatively on the base portion side in the envelope. Output the power to energize the fluorescent lamp, and increase the high-frequency power when the light detection amount is small and decrease the high-frequency power when the light detection amount is large, according to the light detection amount from the light detection means. And an output-controllable high-frequency generator for changing the output.

In the present invention and the following invention, the light detecting means can mainly be constituted by a phototransistor, a photodiode and the like. Controlling the high-frequency power in accordance with the amount of detected light can be achieved by, for example, the following configuration. That is, an optical signal detected by the phototransistor, the photodiode, or the like is converted into an electric signal, and the electric signal is compared with an electric signal corresponding to a predetermined light amount (reference value), and a high-frequency signal is generated so as to eliminate an error. Change the output of the device. The high-frequency power control via the light detecting means may be performed only for a predetermined time after the lighting of the fluorescent lamp, or may be performed during the lighting period. In the case where only a predetermined time after the lighting is performed, the power control function may be controlled by a mechanical or electric circuit timer.

According to the present invention, immediately after the fluorescent lamp is turned on, when the light output of the fluorescent lamp is insufficient due to a low ambient temperature or the like, the light detecting means uses the high-frequency power in accordance with the detected light amount. Increase. Therefore, the light output of the fluorescent lamp rises early.

A lighting device according to a fourth aspect of the present invention includes an envelope having a base at one end and a translucent cover at the other end; an amalgam for controlling mercury vapor pressure; A fluorescent lamp housed opposite the cover; light detecting means provided in the envelope for detecting the light output of the fluorescent lamp; detecting means for detecting the conduction angle of the input phase control voltage; Provided on the base side relatively in the envelope, converts the input phase control voltage into a smoothed DC voltage, converts the smoothed DC voltage into a high-frequency voltage, energizes the discharge lamp, and detects The energizing power of the discharge lamp is changed according to the signal indicating the conduction angle from the means, and the high-frequency power is increased when the light detection amount is small according to the light detection amount from the light detection means, and the light detection amount is increased. Output controllable high-frequency generator that changes output to reduce high-frequency power when high Characterized in that it comprises a; device and.

In the present invention, the high-frequency power control via the detecting means and the high-frequency power control via the light detecting means can be performed by logically operating control information corresponding to a detection signal from each detecting means. . For example, it is possible to perform a logical operation using the control information (dimming degree information) by the detecting means as a reference value for the control by the light detecting means.
In addition, only during a predetermined period after the fluorescent lamp is turned on, a logical operation may be performed by the light detection unit so that the high-frequency power can be increased beyond the control information (dimming degree information) by the detection unit. In this case, the rise of the light output is further accelerated.

The enclosure of the present invention can perform dimming lighting by a phase control voltage in the same manner as in the first aspect of the invention in addition to the third aspect of the invention.

[0021]

Next, one embodiment of the present invention will be described.

FIG. 1 is a circuit diagram showing one embodiment of the present invention. Reference numeral 1 denotes an AC power supply, for example, a 50 Hz, 100 V commercial power supply. Reference numeral 2 denotes a phase control device, which may be a well-known device such as one mainly comprising a triac. Reference numeral 3 denotes a high-frequency generator, which includes a high-frequency blocking filter 4, a rectifier 5, a smoothed DC voltage converter 6, and an inverter 7. The inverter unit 7 includes a switching unit 71 and an oscillation control unit 72 of the switching unit 71.

Reference numeral 8 denotes a fluorescent lamp,
And the electrodes are preheated and / or
Or it is connected to be heated.

Reference numeral 9 denotes detection means for detecting the conduction angle of the phase control voltage from the phase control device 2, which changes the output frequency of the oscillation control unit 72 of the inverter unit 7 according to the detected conduction angle. .

Numeral 10 denotes light detecting means, which is the fluorescent lamp 8
Is detected, and the output frequency of the oscillation control unit 72 of the inverter unit 7 is changed according to the detected output.

Next, the operation of this embodiment will be described. The phase control voltage from the phase control device 2
To the rectifier 5 via the Then, the output voltage of the rectifier 4 is converted into a smoothed DC voltage by the smoothing DC converter 5. The smoothed DC voltage is converted into high-frequency AC power having an envelope of the smoothed DC voltage by the inverter unit 7 and applied to the fluorescent lamp 8. Therefore, the fluorescent lamp 8 is continuously turned on.

The detecting means 9 detects the conduction angle of the phase control voltage, and controls the output of the oscillation control unit 72 with a signal corresponding to the conduction angle. As a result, the high frequency output of the high frequency generator 2 is changed. . For this reason, the fluorescent lamp 8 performs dimming lighting according to the phase angle of the phase control voltage.

The light detecting means 10 detects the light output of the fluorescent lamp 8 for a predetermined period after the fluorescent lamp 8 is turned on, and controls the oscillation control section 7 so that the light output becomes a preset light output.
2 is controlled. Therefore, the light output of the fluorescent lamp 8 rises early.

In this embodiment, an incandescent lamp (not shown) is provided to the phase control device 2 for the high frequency generator 3.
Can be connected in parallel. The incandescent lamp receives the phase control voltage of the phase control device 2 and performs dimming lighting. That is, according to the present invention, dimmable lighting can be performed in the same manner as incandescent lamps.

FIG. 2 is a circuit diagram showing a specific embodiment of the detecting means. The detection means 9 of the present embodiment controls the conduction according to the voltages across the resistors 91 and 92 provided between the output terminals of the rectifier 5 and the resistors 93 and 94 and the resistor 94 provided between both ends of the resistor 92. Transistor 95 to be used. Also, a resistor 96 is connected to the emitter of the transistor 95,
A capacitor 97 is provided in parallel with the transistor 95 and the resistor 96. Further, a discharge resistor 98 is connected to the capacitor 97, and a waveform shaping circuit 99 is provided.

In this embodiment, during the conduction period of the phase control voltage, the transistor 95 is turned on and the capacitor 97 is charged. The voltage across the capacitor 97 is output via the waveform shaping circuit 99 as a pulse voltage corresponding to the conduction period.

FIG. 3 is a circuit diagram showing an embodiment of the smoothed DC voltage converter, FIG. 4 is a circuit diagram showing another embodiment of the smoothed DC voltage converter, and FIG. 5 is a circuit diagram of the smoothed DC voltage converter. FIG. 9 is a circuit diagram showing still another embodiment.

The embodiment shown in FIG. 3 is an active filter using a so-called step-up chopper. FIG. 4 shows a so-called partial smoothing circuit combining a plurality of capacitors. FIG. 5 shows a so-called high-frequency power period-type partial smoothing circuit in which a part of the high-frequency voltage is supplied from the inverter section 7 to charge the capacitor. Since these configurations and operations are well known, description thereof will be omitted.

FIG. 6 is a sectional view showing an embodiment of the lighting device. Reference numeral 11 denotes an envelope having a base 12 on one end side,
A light-transmitting cover 13 is provided on the other end side. Reference numeral 8 denotes a bent fluorescent lamp, in which an amalgam 15 for controlling mercury vapor pressure is sealed in an exhaust pipe 14, an auxiliary amalgam 17 is sealed in the vicinity of an electrode 16, and the electrode side is directed toward one end of the envelope 11. It is arranged.

Reference numeral 18 denotes a partition plate which also serves to hold the fluorescent lamp 8. The fluorescent lamp 8 is a cylindrical portion 19 of a partition plate 18.
The end portion on the electrode side is inserted into the base member, and is bonded with an adhesive 20, and the bent intermediate portion is also bonded with the adhesive 20.

Reference numeral 21 denotes a wiring board on which a part or all of circuit components necessary for lighting the fluorescent lamp 8 described with reference to FIG.

Reference numeral 22 denotes a phototransistor constituting the light detecting means, which is electrically connected to circuit components of the wiring board 21 via lead wires 23.

As can be understood from the description of FIG. 1 and other explanations, the lighting device of this embodiment can also perform dimming lighting and control of light output according to the amount of light output.

[0039]

According to the first and second aspects of the present invention, the input phase control voltage is converted into a smoothed DC voltage, which is converted into a high-frequency voltage to energize the discharge lamp. It is possible to improve the efficiency by substantially turning on the power and substantially eliminating the power consumption for the re-ignition, and to reduce or reduce the flicker of the light output. Further, the discharge lamp can be dimmed and lit according to the conduction angle of the phase control voltage, and can be used similarly to an incandescent lamp or the like.

According to the third aspect of the present invention, since the high-frequency power is changed in accordance with the amount of light detected by the light detecting means, the light output of the fluorescent lamp can be quickly started and the light output can be kept constant. .

The invention according to claim 4 has the same dimming and lighting effect as the invention according to claim 1 in addition to the effect of the invention according to claim 3.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention.

FIG. 2 is a circuit diagram showing a specific embodiment of the detection means.

FIG. 3 is a circuit diagram showing an embodiment of a smoothing DC voltage converter.

FIG. 4 is a circuit diagram showing another embodiment of the smoothing DC voltage converter.

FIG. 5 is a circuit diagram showing still another embodiment of the smoothing DC voltage converter.

FIG. 6 is a cross-sectional view showing an embodiment of the lighting device.

[Explanation of symbols]

 3 High frequency generator 6 Smoothing DC voltage converter 7 Inverter 8 Fluorescent lamp 9 Detector 10 Photodetector

Claims (4)

[Claims] A detecting means for detecting a conduction angle of an input phase control voltage; converting the input phase control voltage into a smoothed DC voltage; converting the smoothed DC voltage into a high-frequency voltage; A discharge-controllable lighting device, comprising: an output-controllable high-frequency generator that energizes and changes the energizing power of the discharge lamp in accordance with a signal indicating a conduction angle from the detection means. 2. A phase control device for controlling the phase of an AC voltage;
Detecting means for detecting a conduction angle from a phase-controlled AC voltage or a rectified DC voltage; converting an input phase control voltage into a smoothed DC voltage, converting the smoothed DC voltage into a high-frequency voltage, and outputting it And an output-controllable high-frequency generator for changing the output in accordance with a signal indicating the conduction angle from the detection means; and a discharge lamp energized by the output of the high-frequency generator. Discharge lamp lighting device. 3. An envelope having a base at one end and a translucent cover at the other end; an amalgam for mercury vapor pressure control sealed therein and housed in the envelope facing the cover. A fluorescent lamp; light detecting means provided in the envelope for detecting the light output of the fluorescent lamp; and a fluorescent lamp which is provided on the base side relatively in the envelope and outputs high-frequency power. Output controllable control that energizes the lamp and changes the output so as to increase the high-frequency power when the light detection amount is small and decrease the high-frequency power when the light detection amount is large, according to the light detection amount from the light detection means. And a high-frequency generator. 4. An envelope having a base at one end and a translucent cover at the other end; an amalgam for mercury vapor pressure control sealed therein and housed in the envelope facing the cover. A fluorescent lamp; light detecting means provided in the envelope for detecting the light output of the fluorescent lamp; detecting means for detecting the conduction angle of the input phase control voltage; Is provided on the base side, converts the input phase control voltage into a smoothed DC voltage, converts the smoothed DC voltage into a high-frequency voltage to energize the discharge lamp, and indicates the conduction angle from the detection means. The energizing power of the discharge lamp is changed according to the signal, and the high-frequency power is increased when the amount of light detection is small, and the high-frequency power is decreased when the amount of light detection is large, according to the amount of light detection from the light detection means. An output controllable high frequency generator for changing the output in the following manner;
A lighting device, comprising: