JP2001257089A - Energy saving power source device for lighting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize and enable to secure energy saving in lighting device, particularly, fluorescent lamp. SOLUTION: By utilizing the afterimage time of the retina of a human being, a higher voltage a little raised than the rated voltage of a lighting lamp is given and the luminous intensity is raised for an instant so that the eyes feel brighter. And then immediately after brighter feeling, the voltage of the lighting is turned 'off' and again the voltage is turned 'on' before they feel darker. As the afterimage time of the human eyes is relatively long, the saving of electric power by 'off' time is larger in total than the electric power loss by giving higher voltage, thereby achieving energy saving.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device, and more particularly to an energy saving device for a fluorescent lamp.

[0002]

SUMMARY OF THE INVENTION Energy saving is demanded worldwide due to environmental problems and the like, and lighting equipment using electric power is particularly demanded for energy saving due to the appearance of convenience stores which are lit 24 hours a day. . In response to such a demand, the fluorescent lamp is turned on at a high frequency of several kilocycles or more by using an inverter, and photoelectrons are increased from the filament, so that power saving of nearly 20% is possible. However, there is a demand for further energy savings even for products that do not use an inverter or that use an inverter.

[0003]

Means for Solving the Problems and Functions Devices utilizing residual images of the human retina, such as movies and televisions, are generally used. The present invention uses the afterimage of the human retina to improve conventional lighting equipment and realize energy saving. The afterimage time of the human retina is 50 milliseconds or more, for example, 50 milliseconds.
When a voltage is applied to the fluorescent lamp as fast as 0 cycles, the fluorescent lamp discharges every half cycle and illuminates every millisecond. At this time, a voltage higher than the rated voltage of the fluorescent lamp is applied to make the human retina feel bright, and then the brightness is recognized as the conventional brightness even if the voltage is turned off.

That is, a voltage higher than the rated voltage of a fluorescent lamp is applied to increase the instantaneous illuminance as compared with the related art to make the human retina recognize that it is bright. Since the lighting device has a larger instantaneous rating than the continuous rating and a smaller continuous average current, the life of the lamp is not shortened.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a conventional general glow ball lighting system will be described with reference to FIG. A voltage is supplied to the step-up transformer 2 by the commercial power supply 1. The voltage of the step-up transformer 2 is boosted in the range of 110% to 130% of the commercial power supply voltage. This voltage is input to the switching semiconductor unit 3, and the controller 4 An oscillator and an ON / OFF ratio setting device are installed. Switching semiconductor unit 3 is FE
It is composed of switching semiconductors called T and IGBT connected in the forward and reverse directions.

[0006] The frequency of the oscillator is selected so that the human eye does not feel flickering and does not give as much noise to external equipment as 500 cycles as an example. ON, OFF
The selection of the ratio is set to such an extent that human eyes perceive the conventional brightness. Switching semiconductor unit 3 between terminals A and B
Is output after being chopped at the frequency set by the controller 4. The voltage passing through the ballast 5 is sent to the filament FLa of the fluorescent lamp FL, and the other voltage is sent to the filament FLb of the fluorescent lamp FL.

When a voltage is applied to the filaments FLa, FLb of the fluorescent lamp FL, the glow bulb 6 is discharged, the filaments FLa, FLb of the fluorescent lamp FL are heated, photoelectrons are easily generated, and the fluorescent lamp FL is turned on. When the fluorescent lamp FL is turned on, the voltage between the filaments FLa and FLb of the fluorescent lamp FL decreases, and the discharge of the glow bulb 6 is stopped. A noise prevention capacitor C1 is connected in parallel with the glow sphere 6 to prevent external noise.

A conventional fluorescent lamp 13 can be additionally connected between the terminals A and B, and a plurality of conventional fluorescent lamps 13 can be connected according to the capacity of the power supply device 12 of the present invention. Although the step-up transformer 2 is shown in FIG. 1 with multiple windings, a single winding or an addition transformer may be used. Although FIG. 1 shows a single-phase two-wire system, the present invention can also be applied to a single-phase three-wire system or a three-phase circuit.

FIG. 3 shows a voltage waveform according to the present invention. The voltage waveform of the present invention is larger than that of the conventional commercial voltage, but is chopped, so that the effective value which is the basis of power use is conversely reduced, thereby saving power, that is, saving energy.

Next, an inverter type device will be described with reference to FIG. The commercial power supply 1 is converted to DC by a rectifier circuit 7 composed of a diode bridge and a smoothing capacitor, and when this voltage is connected to a DC booster circuit 8 composed of a choke coil and a chopper circuit, it is converted to DC by the rectifier circuit 7. The output voltage rises, and is connected to a high-frequency transformer 11 through an inverter 9 that converts the high frequency of several kilocycles to several kilocycles by a switching transistor or the like.

The inverter 9 is driven by a set value of an inverter setter 10 to control a high frequency and an ON / OFF ratio. The frequency is further increased by a high frequency transformer 11 so that the filaments FLa and FLb of the fluorescent lamp FL are connected to each other. , The fluorescent lamp FL is turned on.

The fluorescent lamp FL emits photoelectrons of the FL filaments FLa and FLb when illuminated at a high frequency, and energy saving can be achieved only by setting the frequency to a high frequency. However, in the present invention, by applying a voltage higher than the conventional voltage and providing an OFF time, further energy saving can be achieved even with high-frequency lighting.

Referring to FIG. This voltage waveform is a comparison between the conventional voltage output from the inverter and that of the present invention. While the conventional voltage waveform is continuous, the present invention is higher than the conventional voltage and is discontinuous. In FIG. 2, the voltage is increased by a DC circuit, but may be increased by a transformer on the input or output side. Further, the present invention is not limited to the circuit described here, but covers a circuit according to the gist of the present invention.

[0014]

According to the present invention, power consumption can be reduced without lowering the perceived brightness of the fluorescent lamp, and the construction of the apparatus is relatively simple, which is economically advantageous.

[Brief description of the drawings]

FIG. 1 is a circuit diagram in which a power supply portion of the present invention is combined with a conventional glow bulb lighting method.

FIG. 2 is a circuit diagram in which the present invention is incorporated in an inverter system.

FIG. 3 is a voltage waveform diagram of FIG.

FIG. 4 is a voltage waveform diagram of FIG. 2;

[Explanation of symbols]

 1 Commercial power supply 2 Step-up transformer 3 Switching semiconductor unit 4 Controller 5 Ballast 6 Glow ball 7 Rectifier circuit 8 Step-up circuit 9 Inverter 10 Inverter setting device 11 High-frequency transformer 12 Power supply device of the present invention 13 Conventional fluorescent lamps A, B Terminal FL Fluorescent lamp FLa, FLb Fluorescent lamp filament C1 Noise prevention capacitor

Claims (1)

[Claims] In a power supply of a lighting device, a voltage higher than a continuous rating of a lighting lamp is applied, and a switching control is performed so that an ON time and an OFF time of this voltage are less than power consumption when the lighting lamp is operated at a continuous rated voltage. Power supply.