JPS63136492A - Lamp lighter - 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 lighting device, and more particularly to a device for lighting a lamp at high brightness by supplying a voltage exceeding its rating.

As shown by the broken line in Figure 7, the spectral distribution of the lamp when used at its rated value usually has a peak around 1,000 nanometers in terms of wavelength, and compared to sunlight, the spectral distribution of the lamp when used at its rated value usually has a peak around 1,000 nanometers. Due to the small amount of nanometer components, the color appears redder than the actual color, and the disadvantage is that using it as a light for a long time can cause eye fatigue.

The inventor of the present invention has conducted extensive studies on a method for obtaining illumination similar to sunlight using a lamp, and found that the voltage is boosted by an AC boosting means and supplied to the lamp, and the lamp is turned on at high brightness at a voltage exceeding its rated voltage. It has been found that by lighting, light suitable for illumination having a peak at a wavelength shorter than 1,000 nanometers, as shown by the solid line in FIG. 7, can be easily obtained.

That is, the gist of the present invention is a structure of a lamp lighting device characterized in that the voltage of alternating current is boosted by boosting means and supplied to the lamp, and the lamp is lit at a voltage exceeding its rated voltage.

Hereinafter, the present invention will be explained with reference to an embodiment. The circuit shown in FIG. 1 is a circuit of an embodiment of the present invention. For example, the lamp V is connected to the secondary winding L2 having a winding ratio of 100:1 to 100:40, and one end of the negative winding L1 and one end of the secondary winding L2 are connected. , -100 volts AC is supplied from the second winding L1.

The voltage supplied to the lamp ν in excess of the rated voltage is determined by the required amount of light and the life of the lamp V, and is usually about 101 to 140% of the rating, preferably 110 to 13%.
Set to 0%.

In this example, when the power switch S is closed, the lamp V
, a secondary voltage of 1 to 40 volts from the transformer T is superimposed on AC 100 volts, and the 7th voltage is supplied from the lamp ν.
Illumination light having a spectral distribution as shown by the solid line in the figure can be obtained.

Fig. 2 shows an example in which an autotransformer T is used as a voltage boosting means.A lamp V is connected to the end of the winding Ll and L2, which are divided into windings L1 and L2 by a tap A, through a negative resistor Th. A current of 100 volts per current is supplied from both ends of the tube.

The negative resistance Th is for preventing a rush current immediately after the power switch S is turned on.

In this example as well, the solid line in FIG. Illumination light having a spectral distribution as shown in the figure can be obtained.

The example shown in FIG. 3 is similar to the example shown in FIG. 2, in which an autotransformer T1 supplies the lamp V with a voltage exceeding its rating.

In this example, the main circuit of a bidirectional three-terminal thyristor DCR is connected in series to the lamp, and the continuity of the thyristor DCR is connected to another transformer T2 connected to 100 volts AC. This is performed by a phase shift circuit including a secondary coil L2 having a center tap, a resistor R5, and a capacitor C2. The phase shift circuit compares the reference voltage provided by the constant voltage diode Z with the voltage across the resistor R2, and when the voltage across the resistor R2 exceeds a predetermined value, the bidirectional three-terminal thyristor DCR is activated.
This is to reduce the conduction of the lamp ν and to prevent excessive power from being supplied to the lamp ν.

The example shown in FIG. 4 uses an autotransformer T as a step-up means, and a bidirectional three-terminal thyristor DCR.
This is an example of automatically restricting excessive current flowing into the lamp V.

In this example, the boosted voltage is divided by resistors R1 and R2 at an appropriate ratio, and the voltage across resistor R2 and voltage regulator diode Z are
By comparing the voltage across the resistor R2 with the reference voltage, if the voltage across the resistor R2 exceeds a predetermined value, the circuit shown in FIG.
This is an example in which an autotransformer T is used as the boosting means, and the rush current when the power switch S is turned on is limited by a bidirectional three-terminal thyristor combined with an RC time constant circuit.

For example, if the resistor R1 in the RC time constant circuit is set to 10 kilohms and the capacitor C is set to 1.000 microfarads, the time constant is approximately 1 second, so the lamp is turned off for 1 second after turning on the power switch S. By preheating and limiting the rush current when supplying the boosted voltage by the autotransformer T, the life of the lamp can be extended.

The example shown in FIG. 6 is an example in which a lamp with a rated voltage of 12 volts and 40 watts, which is used in an automobile headlamp, is used.

In the transformer T, for example, 1
00:12.10113.100:14.100715
By providing secondary windings 2, L3, L4, and 5 having a winding ratio of
The voltage supplied to the circuit can be appropriately selected within the range of 12 volts to 15 volts.

In this example, since the transformer T limits the inrush current when the power switch 31 is turned on, the device can be configured simply, and the lamp for an automobile headlight does not have to handle voltage exceeding its rating. Since the filament heat generation rate is relatively slow even when applying voltage, it is possible to reduce the number of lamp replacements.

In general, car headlight lamps have a greater thermal inertia than regular incandescent bulbs, so there is less flickering when the lights are turned on.
Furthermore, by attaching the transformer T to the bottom of the device, the device itself can be stably installed, making it suitable for use as a lighting device such as a desk lamp. Automobile headlight lamps may have too much brightness, so in that case, for example, use a frosted glass enclosure, a shade with a silica coating on the inside, or a shade with a silica coating on the inside. Since the present invention is configured in this way, it is possible to extremely easily obtain illumination light that is rich in visible light components like sunlight and does not cause eye fatigue. Suitable for lighting computer rooms, study rooms, etc.

[Brief explanation of the drawing]

The first shows a circuit of an embodiment of the invention. FIG. 2 shows a circuit according to an embodiment of the present invention that combines an autotransformer and a negative resistance. 3 and 4 show circuits of embodiments of the invention with current limiting means. FIG. 5 shows an embodiment of the invention having inrush current limiting means. FIG. 6 shows a circuit of an embodiment of the invention using an automobile headlamp as the light source. FIG. 7 shows the spectral distribution spectrum when the lamp is turned on at the rated voltage or at a voltage exceeding the rated voltage. The symbols in the figure are T, transformer, DCR, bidirectional three-terminal thyristor, R, resistor, C, capacitor, D, diode, Z, etc. Constant voltage diode, W, Lamp, S, Switch, Th093. It is negative resistance.

Claims (5)

[Claims] (1) Boosting the voltage of alternating current using boosting means and supplying it to the lamp;
A lamp lighting device characterized by lighting a lamp at a voltage exceeding its rated voltage. (2) The lamp lighting device according to claim (1), wherein the boosting means is an autotransformer. (3) The lamp lighting device according to claim (1) or (2), wherein the lamp is an incandescent light bulb. (4) The lamp according to claim (1), (2) or (3), characterized in that the lamp is supplied with a voltage exceeding its rating and up to 140% of its rating. Lighting device. (5) Claims (1), (2), and (3) characterized in that the lamp is a lamp for an automobile headlamp.
) or (4).