JPH01200502A - Illumination device - Google Patents

Abstract

PURPOSE:To enhance the responsiveness in simple constitution by moving the discharge column due to a pair of discharge electrodes, which are arranged so that the spacing widens by and by, through the action of magnetic field. CONSTITUTION:Discharge start voltage is impressed, and needle-shaped start electrodes 4, 4' of a head light 1 starts discharging. When discharge due to discharge electrodes 3, 3', whose spacing widens backward from, is stabilized by a discharge maintaining voltage generating device, discharge by the mentioned electrodes 4, 4' stops. When magnetic field is impressed perpendicularly to a discharge column 13 formed in the narrowest part of the spacing of electrodes 4, 4' through a coil 6, electric charges moving the discharge column 13 displace according to the strength of the magnetic field, and the light pattern of irradiating light varies with good responsiveness. Thereby the responsiveness can be enhanced in simple constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a lighting device capable of changing a luminous flux orientation pattern.

<Prior Art> As a conventional lighting 5A installation, there is one shown in FIG. 5, for example. FIG. 5 is a sectional view of a headlamp mounted on a vehicle or the like. 32 is an incandescent lamp bulb. 33
is a pedestal that holds the incandescent lamp bulb 32. 34
is a sliding portion that moves the base 33 from side to side in FIG. 35 is a solenoid actuator that slides the sliding part 34. 36 is a solenoid actuator 35
This is the drive circuit. 31 is a parabolic mirror. 37 is
The figure depicts an example of the optical path of light from an incandescent lamp bulb 32 reflected by a parabolic mirror 31.

In this lighting device, a solenoid actuator 35 driven by a drive circuit 36 is moved by a sliding portion 34 to a pedestal 3 holding an incandescent lamp bulb 32.
Move 3. Then, the light from the incandescent lamp bulb 32 reflected by the parabolic mirror 31 is transferred to the fifth incandescent lamp bulb 32.
By moving left and right in the figure, the parabolic mirror 311O
The spread angle of the irradiated light in the direction changes. That is, by moving the incandescent lamp bulb 32 away from the parabolic mirror 31 (toward the right in the figure), the light becomes a pencil beam that reaches far away, making it difficult to see when the vehicle is driving on a dark straight road, for example. will improve. Also, by bringing the incandescent lamp bulb 32 closer to the parabolic mirror 31 (toward the left in the figure), the light becomes a beam that irradiates a wide and short distance, providing good visibility in situations where there are many people or obstacles, for example. Obtainable.

<Problems to be Solved by the Invention> However, in a lighting device such as a headlamp mounted on a vehicle as shown in FIG. The incandescent lamp bulb 32 is moved by driving the pedestal 33 that holds the incandescent lamp bulb 32 and sliding it on a sliding part 34, thereby having a mechanically movable part.

Therefore, the response is poor, and when used for vehicle headlights, for example, a movable mechanism that can withstand adverse effects such as vibration is required, and mechanical movable mechanisms have problems when the structure becomes complex. .

An object of the present invention is to provide a lighting device with good responsiveness and a simple structure.

<Structure of the Invention> The present invention provides a pair of discharge electrodes arranged such that the interval gradually increases, a discharge sustaining voltage generator that generates a voltage between the discharge electrodes, and a charge moving between the pair of discharge electrodes. It consists of an electromagnetic field generator that applies an electric or magnetic field to the

<Function> In the lighting device of the present invention configured as described above, the orientation pattern of the lighting device is changed by changing the position of the discharge pillars generated between the flat discharges based on the intensity of the electric field or magnetic field.

<Example> An embodiment based on the present invention will be described based on the drawings.

FIG. 1 is a front view of the light emitting part of the device of this embodiment, and the second
The figure is a sectional view of FIG. 1. FIG. 3 is a diagram in which a system block diagram of the device of this embodiment is added to a top view of the light emitting section.

First, 1 is a headlight of a vehicle, for example, as a light emitting part, and 2 is a parabolic mirror that reflects light from a light source and sends the light forward of the headlight 1.

3.3' is a flat discharge electrode, which extends from the front to the rear of the headlight 1 (from the front to the back of the paper in FIG.
In Fig. 2, from the middle cloth to the left,) they face each other with a widening distance between them. 4.4' is a needle-shaped starting electrode, and 5 is a discharge tube incorporating a flat discharge electrode 3.3' and needle-shaped starting N poles 4, 4'. 7, since FIG. 2 is a cross-sectional view, the configuration is the same as that in 1.
FIG. 3 shows the direction of a magnetic field generated by a magnetic field generator as an electromagnetic field generator. 6 is a coil;
An electric wire is wound around a magnetic material such as permalloy, and is arranged so that a magnetic field is generated in a direction perpendicular to the direction facing the flat discharge electrode 3.3'. One end of the Ti wire wound around the magnetic material and the power source 10 are connected via a variable resistor serving as a current controller 8, and the other end of the wire wound around the magnetic material and the power source 10 are connected via a switch 9. There is. As described above, the magnetic material around which the electric wire is wound, the current controller 8 and il! m
l.

A magnetic field generating device is configured. 11 is a discharge sustaining voltage generator, and 12 is a discharge starting voltage generator.

In addition, in FIGS. 1 to 3, a, b,
c, a', b', c' and a, b outside the parabolic mirror
, c, a', b', and c' are connected with the same symbol.

Next, the operation of the device of this embodiment will be explained.

First, several kV generated by the discharge starting voltage generator gA112
A voltage of (kilovolts) is applied between the needle-shaped starting electrodes 4° and 4' to initiate the discharge. And discharge sustaining voltage generator 1
When the fi voltage applied in step 1 is maintained between the flat discharge electrodes 3 and 3', the discharge starting voltage generator 1112 stops generating voltage, and the discharge between the needle-shaped starting electrodes 4 and 4' starts. It will no longer be done. At this time, since the flat discharge electrodes 3 and 3' face each other at an angle of several degrees, the discharge occurs at the narrowest point, that is, in this embodiment, from the parabolic mirror 2. A discharge occurs at a certain point, and a discharge column 13 is formed. When a magnetic field 1] is generated by the magnetic field generator in this state, the charge q (ions) moving inside the discharge column 13 receives the force of QV*H, and the discharge column 13 moves according to the force of the magnetic field H (V is the velocity of charge q). However, the flat discharge electrode 3.3
Since ' is inclined, the electric charge tries to return to the narrowest point between the flat discharge electrodes 3 and 3', and the discharge column 13 moves to a position balanced with the force of qv direction H.

That is, the bright spot will move. The result is a paraboloid!
The orientation pattern of the light reflected by l12 changes. For example, if the bright spot of the discharge column 13 is moved by 5 m using a parabolic mirror 2 with a focal length of 111,120 am, the orientation beam will change by about 10 degrees over the entire width. Therefore, the orientation pattern of the irradiated light can be changed based on the magnetic field applied to the discharge column 13 generated within the discharge tube.

Next, another embodiment of the present invention will be described based on FIG.

In the embodiment shown in Fig. 1, 11 fields were applied to the discharge column by the magnetic field generator in order to move the discharge column, but in this embodiment, the electric field generator as an electromagnetic field generation illumination was applied to the discharge column in the moving direction. It is designed to apply an electric field. FIG. 4 is a side view, and parts that are the same as those in the embodiment shown in FIGS. 1 to 3 are given the same numbers, and explanations thereof will be omitted.

21.21' is an electrode for generating an electric field, and the material of the electrode may be metal in order to block light directed toward the front of the lamp, but in order to increase the efficiency of emitted light, a transparent electrode (for example, I
0 film) can also be used.

22 is a switch, and 23 is a variable transformer.

24 is a power source on the primary side of the variable transformer 23, which includes the electric field generating electrode 21.21', the variable transformer 23 and the power source 24.
An electric field generator is constructed.

The operation is basically the same as the previous embodiment, but in this embodiment, by generating an electric field between the electric field generating electrodes 21 and 21', the discharge column generated between the discharge sustaining electrodes is A force is applied to the charge, and the discharge column moves, that is, the bright spot moves to a position where the force due to the electric field applied to the charge and the force applied to the charge due to the inclination of the flat discharge electrode 3.3' are balanced. Therefore, the orientation of the lamp can be changed based on the electric field applied to the discharge column.

In this example, flat discharge electrodes 3 and 3' are used as the electrodes for maintaining discharge, but they may be curved as long as the interval is gradually widened. The shape may be processed. Alternatively, the alignment pattern may be controlled by adding a means for controlling the inclination of the electrodes that maintain the discharge and changing the inclination.

<Effects of the Invention> As explained above, according to the present invention, the configuration is such that the spacing between the discharge electrodes of a lighting device using a discharge tube is changed and an electromagnetic field is applied to the generated discharge column. , responsive layer (orientation can be controlled and good visibility can be obtained. Also, since there are no moving parts, the durability as a lighting device is improved.

[Brief explanation of the drawing]

FIG. 1 is a front view of one embodiment of the present invention. FIG. 2 is a diagram 1liI of one embodiment of the present invention. FIG. 3 is a top view of an embodiment of the present invention plus a system block diagram. FIG. 4 is a side view of another embodiment of the present invention. FIG. 5 is a conventional example 3.3'... flat discharge electrode, 4.4'... needle-shaped starting electrode, 5... Discharge tube, 6, 21. 21'... Electromagnetic field generator, 8... Current controller, 9... Switch, 10... Power supply, 11... Discharge sustaining voltage generation V
@ Place, 12...Discharge starting voltage generator. Patent applicant Nissan Motor Co., Ltd. Figure 1 Cause 4 No. 5im

Claims (1)

[Scope of Claims] A pair of discharge electrodes arranged so that the interval gradually increases, a discharge voltage generator that generates a voltage between the discharge electrodes, and an electric field or a magnetic field applied to the charge moving between the pair of discharge electrodes. An illumination device comprising: an electromagnetic field generating device as described above;