JP2010146845A - Lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide stable dimming lighting without causing unevenness in brightness along a tubular portion when a plurality of neon tubes are provided close to each other and are lit at high frequency and dimmed. It is an object to provide a simple lighting device.
A lighting device 1 according to the present embodiment is located between neon tubes 10, extends along electrodes 5 of the neon tube 10, and is a shield made of a proximity conductor that blocks a leakage current generated from the neon tube 10. A wall 30 is provided, and the shielding wall 30 is an upper wall that protrudes upward from the reflector 20 at a height that is at least half the cross-sectional diameter of the neon tube 10 and does not hide all of the cross-sectional diameter of the neon tube 10. Since 31 is provided, the leakage current from one neon tube 10 can be cut off without flowing into the other neon tube 10. Further, the light emission color can be controlled by mixing the light emission colors of the adjacent neon tubes 10 without dividing the light emission color for each neon tube 10.
[Selection] Figure 1

Description

  The present invention relates to an illuminating device in which a plurality of discharge tubes are provided close to each other, lighting control of the discharge tubes is performed at a high frequency, and light control is possible.

Conventionally, the applicant has proposed an illuminating device in which a neon tube as shown in Patent Document 1 and a transformer for supplying electric power to the neon tube are integrally configured and used by being hung on an indoor or outdoor wall surface.
The internal structure of these conventional lighting devices 1 is shown in FIG. A plurality of neon tubes 10 a, 10 b, and 10 c having different colors are provided, and the neon tube 10 is held and fixed by a holding tool 4 provided above the reflecting plate 20. A transformer 3 that supplies electric power to the neon tube 10 is provided below the reflecting plate 20. The curved bent portions 11 at both ends of the neon tube 10 are provided with electrodes 5 connected to the wiring 2 extending from the transformer 3. The wiring stopper 9 prevents the wiring 2 from drooping below the reflector 20. Is fixed.

Thus, the illuminating device 1 is designed so that the plurality of neon tubes 10a, 10b, and 10c and the transformer 3 are attached to the reflecting plate 20 as one unit, and the overall size is reduced.
And the illuminating device 1 is dimming the neon tube 10 by adjusting the electric current of the neon tube 10 with the controller which is not illustrated. These lighting devices 1 can produce various light effects by dimming the brightness of light emitted from a plurality of neon tubes 10, and are used as neon signs or lighting for effects in stores and buildings. ing.

  However, in the conventional lighting device 1, as shown in FIG. 7B in which the vicinity of the left end of the neon tube 10 is enlarged, when the neon tube 10b is dimmed, the current decreases as the brightness is reduced, A potential difference is generated between the neon tubes (10b, 10c). Since the two neon tubes 10 are adjacent to each other, a high-frequency leakage current is applied to the adjacent neon tube 10b before reaching the other electrode 5 from one electrode 5 of one neon tube 10c. As shown by the dotted line in FIG. 7 (B), a leakage current is generated from the neon tube 10c to the neon tube 10b. There is a problem of causing.

In order to solve such problems, the following inventions have been proposed conventionally.
For example, as seen in Patent Document 2 and Patent Document 3, the curved outermost part of the neon tube is provided with a proximity conductor made of aluminum tape, and the width is narrower than the diameter of the positive column in the discharge path, An invention is disclosed in which flickering is prevented by attracting the adjacent conductor even when the positive column is thinned by dimming.
Further, an invention as disclosed in Patent Document 4 is disclosed as a countermeasure against a leakage current generated by adjacent fluorescent tubes. The invention discloses a discharge lamp lighting device configured to light a dimmable discharge lamp at a high frequency and to be dimmable, and to the one end on the electrode side of the bendable discharge lamp, By providing an auxiliary conductor on the end side of the end, all of the leakage current energy generated near the electrode when deep dimming is performed passes through the pipeline in a form that is attracted to the auxiliary conductor and bent. It is disclosed that the non-uniformity of brightness that has occurred along the pipe line direction between both electrodes and ends of a shaped discharge lamp is eliminated.

Japanese Patent Laying-Open No. 2007-87920 (FIG. 1) JP-A-8-106880 (paragraph [0040] to paragraph [0042], FIG. 1) Japanese Patent Laid-Open No. 11-102665 (paragraph [0024], FIG. 1 and FIG. 12) JP 2002-43087 A (paragraph [0034] to paragraph [0038], FIG. 1 and FIG. 2)

However, among these inventions, in the former invention in which the proximity conductor is provided along the outer periphery of the neon tube, when the distance between the neon tubes is closer, it is affected by the leakage current from the neon tube. A problem occurs.
Further, in the latter invention in which the proximity conductor is provided at the opposite end facing the electrode so as not to be affected by the adjacent discharge tube, if the length of the entire discharge tube is increased, the proximity conductor is separated from the electrode. This causes a problem that it becomes difficult to eliminate the influence of the leakage current because the distance to the time becomes longer, it becomes impossible to attract current.
Also, if the entire conductor is covered with adjacent conductors, for example, if you want to mix the colors of adjacent red neon tubes and blue neon tubes and use them as emission colors, the colors will change as each neon tube is partitioned. The problem that it becomes difficult to mix and use occurs.

  Therefore, in view of the above problems, the present invention provides a plurality of discharge tubes such as neon tubes or fluorescent tubes close to each other, lights up at a high frequency, and adjusts the brightness along the tubular portion. It is an object of the present invention to provide an illumination device capable of stable dimming and lighting without causing unevenness.

  The lighting device according to claim 1 (for example, corresponding to the lighting device 1 of the present embodiment) corresponds to a plurality of discharge tubes (for example, the neon tube 10 of the present embodiment, such as an EEFL tube or a fluorescent tube). (Which may be present) close to each other, a high-frequency power is supplied to the electrode of the discharge tube (e.g., corresponding to the electrode 5 of the present embodiment), and the discharge tube is turned on and dimmed In the lighting device, a plate-like reflecting plate (for example, corresponding to the reflecting plate 20 of the present embodiment) that reflects light from the discharge tube upward is provided below the discharge tube, and the discharge A shielding wall (for example, corresponding to the shielding wall 30 of the present embodiment) that is located between the tubes, extends along the electrodes of the discharge tube, and blocks leakage current generated from the discharge tube. Is provided.

  With the above configuration, leakage current from one discharge tube can be blocked from flowing to the other discharge tube. Therefore, the lighting device of the present invention does not cause flickering or breakage of the discharge tube even if dimming control is performed.

  3. The lighting device according to claim 2, wherein the shielding wall protrudes upward from the reflecting plate to a height position that is at least half the cross-sectional diameter of the discharge tube and does not cover all of the cross-sectional diameter of the discharge tube. An upper wall (for example, corresponding to the upper wall 31 of the present embodiment) is provided.

  With the above configuration, the light emission color can be controlled by mixing the light emission colors of the adjacent discharge tubes without dividing the light emission color for each discharge tube.

  4. The lighting device according to claim 3, wherein the discharge tube is provided with both ends bent, the electrode is provided at the bent tip, and at least the electrode is hidden, and the cross-sectional diameter of the discharge tube is provided on the shielding wall. A lower end wall (for example, corresponding to the lower end wall 32 of the present embodiment) protruding downward from the reflecting plate to a height position where at least half of the height is hidden is provided.

  With the above configuration, at least the electrodes that are most susceptible to the leakage current are shielded to the position where they are hidden, so that the leakage current can be reliably cut off. Therefore, the lighting device of the present invention does not cause flickering or breakage of the discharge tube even if dimming control is performed.

  5. The lighting device according to claim 4, wherein the shielding wall extends in a longitudinal direction at an upper center of the reflector and is at least half of a cross-sectional diameter of the discharge tube, and all of the cross-sectional diameter of the discharge tube is hidden. A central wall (for example, corresponding to the central wall 33 of the present embodiment) is provided so as to protrude upward from the reflector to a height position that does not exist.

  With the above configuration, the leakage current from one discharge tube can be blocked without flowing out to the other discharge tube. Therefore, the lighting device of the present invention does not cause flickering or breakage of the discharge tube even if dimming control is performed.

  6. The lighting device according to claim 5, wherein the discharge tube has an aluminum tape having a width smaller than a radius of the discharge tube in a longitudinal direction at a position facing the reflection plate (for example, the aluminum tape of the present embodiment). Equivalent to 40).

  With the above configuration, the electric charge discharged between the electrodes of one discharge tube can be guided from the other electrode to the one electrode with the aluminum tape serving as the adjacent conductor, and the discharge can be stabilized. Therefore, the lighting device of the present invention does not cause flickering or breakage of the discharge tube even if dimming control is performed.

  The lighting device of the present invention is provided with a plurality of discharge tubes close to each other, and when lighting and dimming at a high frequency, there is no unevenness in brightness along the tube of the neon tube, and stable dimming lighting Is possible.

The best mode for carrying out the present invention will be described below with reference to FIGS.
FIG. 1 is a perspective view showing a state in which the cover 8 of the lighting device 1 of the present embodiment is removed. FIG. 2 is an end view of the lighting device 1 of the present embodiment as viewed from the side. FIG. 3A is a plan view of the reflecting plate 20 in the illumination device 1 of the present embodiment. FIG. 3B is a front view of the reflecting plate 20 in the illumination device 1 of the present embodiment. FIG. 3C is a bottom view of the reflecting plate 20 in the lighting device 1 of the present embodiment. FIG. 3D is a right side view of the reflecting plate 20 in the lighting device 1 of the present embodiment, the right side view and the left side view appear symmetrically, and the left side view is omitted. FIG. 4 is an enlarged right side view of the reflecting plate 20 in the illumination device 1 of the present embodiment. FIG. 5 is a cross-sectional view of the bent portion 11 of the neon tube 10 in the lighting device 1 of the present embodiment. In addition, the same code | symbol is attached | subjected to the same structure demonstrated in FIG. 7 of the prior art example mentioned above.

As shown in FIG.1 and FIG.2, the illuminating device 1 is the box-shaped housing | casing 7 which opened one surface, the milky white and transparent transparent cover 8 formed so that the opening might be covered, the neon tube 10, A plate-like reflecting plate 20 that fixes the transformer 3 and a neon tube 10 in which neon gas that emits light by discharge is enclosed are provided.
Inside the housing 7, a transformer 3 (not shown) that supplies power to the neon tube 10 and an electrode 5 connected to the wiring 2 extending from the transformer 3 are installed in the curved bent portions 11 at both ends of the neon tube 10. A wiring stopper 9 is fixed below the reflecting plate 20 so that the wiring 2 does not hang down.

Two neon tubes 10 are provided, and the light emission colors are different. The neon tube 10 can be made to obtain various emission colors by applying a fluorescent material to the inner wall of the tube, or can change the emission color by coloring the glass tube of the neon tube 10. The neon tube 10 is gripped and fixed by the resin gripping tool 4 fixed to the reflecting plate 20.
As shown in FIG. 5, the neon tube 10 is a position facing the reflection plate 20 in order to guide current between the electrodes 5, and extends along the electrodes 5, and is an aluminum tape 40 that is one of the adjacent conductors. Is attached to the outer periphery of the neon tube 6. The width of the aluminum tape 40 is smaller than the radius of the neon tube 10.
In addition, the lighting device 1 is a controller (not shown), and can adjust the light by changing the current supplied between the electrodes 5 of the neon tube 10 to produce various light effects. It can be used as neon sign or lighting for production.

As shown in FIGS. 2 to 4, the reflecting plate 20 is provided in a plate shape coated with a white paint so as to reflect the light emitted from the neon tube 10. A fitting piece 24 extending upward is provided at the side end of the reflecting plate 20, and the fitting piece 24 is fitted to the fitting portion 12 having a U-shaped cross section at the lower end of the cover 8. Is provided. Therefore, the cover 8 is fixed by being fitted to the reflecting plate 20.
In the reflection plate 20, a transformer fixing hole 21 that becomes a hole for fixing the transformer 3 with a screw, a gripping tool fixing hole 22 that becomes a hole for inserting and fixing the gripping tool 4, and a wiring stopper 9 with screws or the like. A wiring stopper fixing hole 23 is formed as a hole for fixing with a wire.

In the center of the reflector 20, a metallic shielding wall 30 as a proximity conductor is provided so as to partition between the neon tubes 10 in order to prevent interference of leakage current, and the shielding wall 30 is an upper wall 31. And a lower end wall 32 and a central wall 33.
The upper wall 31 is located at the center of the reflecting plate 20, is formed in an L-shaped cross section, extends along the neon tube 10, and is attached to both ends of the reflecting plate 20. The top end of the upper wall 31 is at least half the cross-sectional diameter of the neon tube 10 and extends upward from the reflector 20 to a height position where all of the cross-sectional diameter of the neon tube 10 is not hidden.
The central wall 33 is located at the center of the reflecting plate 20, is formed in an L-shaped cross section, extends along the neon tube 10, and is attached to the center of the reflecting plate 20. The tip of the central wall 31 is at least half the cross-sectional diameter of the neon tube 10 as with the upper wall 31 and is directed upward from the reflector 20 to a height position where all of the cross-sectional diameter of the neon tube 10 is not hidden. It has been extended.

The lower end wall 32 is located at the center of the reflecting plate 20, has an L-shaped cross section, is formed in an L shape along the bent portion 11 of the neon tube 10, and is attached to both ends of the rear surface of the reflecting plate 20. Yes. The lower end wall 32 extends a portion above the reflector 20 to a height position similar to that of the upper wall 31 and is at least half the cross-sectional diameter of the neon tube 10. These are extended upward from the reflecting plate 20 to a height position where all of these are not hidden.
Further, the lower end wall 32 is located above the reflector 20 at a position below the reflector 20 at a position where at least all of the electrodes 5 are concealed and at least a height of at least half the cross-sectional diameter of the neon tube 10. It is extended toward.

Based on FIG.1, FIG5 and FIG.6, the effect | action of the illuminating device 1 of this embodiment is demonstrated.
The neon tube 10 is provided in close proximity, and when the neon tube 10b is dimmed and squeezed darkly, the current is reduced and the neon tube 10b maintaining the brightness as it is has a higher potential. Since the shielding wall 30 is provided, the leakage current (arrow indicated by the dotted line R in FIG. 6) having a high potential is attracted to the wall 30 and is not attracted to the other neon tube 10b. Grounded. Therefore, the leakage currents between the neon tubes 10 do not interfere with each other.
In particular, the leakage current between the neon tubes 10 does not interfere with each other by partitioning the entire electrode 5 with the lower end wall 32 of the adjacent conductor.
Further, the neon tube 10 is a position facing the reflecting plate 20 in order to guide current between the electrodes 5, and an aluminum tape 40 that extends between the electrodes 5 and is one of the adjacent conductors is used as the neon tube 6. Therefore, electric charges can be stably conveyed from one electrode 5 to the other electrode 5. Therefore, the lighting device 1 can suppress occurrence of flickering and disappearance.

The upper wall 31 or the central wall 33 is at least half the cross-sectional diameter of the neon tube 10 and extends upward from the reflector 20 to a height position where the entire cross-sectional diameter of the neon tube 10 is not hidden. Therefore, the lighting device 1 emits light from the neon tube 10 that emits a different color as compared to the case where the wall is provided up to the height position of the upper end of the neon tube 10 as well as blocking the leakage current. The color can be radiated to the outside in a harmonious state.
For example, as shown in FIG. 6, when the neon tube 10a emits blue light b1, the blue light b1 reaches the position b2 (solid arrow). Next, when the neon tube 10b emits red light r1, the red light r1 reaches the position r2 (solid arrow). And these overlapping parts appear to mix red and blue colors. In particular, when the milky white cover 8 is used, the light emission color appears to be mixed with the cover 8 on the inner surface.

Moreover, the illuminating device 1 can also mix the light reflected by the reflecting plate 20. For example, as shown in FIG. 6, when the neon tube 10a emits blue light, the blue light b1 is reflected by br1 by the reflection function of the reflecting plate 20 and reaches the position of br2 (dashed line) Arrow).
Next, when the neon tube 10b emits red light, the red light r1 is reflected by rr1 by the reflection function of the reflecting plate 20 and reaches the position of rr2 (dashed line arrow). These overlapping parts appear to be a mixture of red and blue colors. In particular, when the milky white cover 8 is used, the light emission color appears to be mixed with the cover 8 on the inner surface. Therefore, the illuminating device 1 can produce various light effects.

The effect grasped from the present embodiment will be described in detail below.
(1) The lighting device 1 of the present embodiment is located between the neon tubes 10, extends along the electrodes 5 of the neon tube 10, and is a shielding wall 30 made of a metal that blocks leakage current generated from the neon tube 10. Therefore, the lighting device 1 of the present invention does not cause the neon tube 10 to flicker or break even if the light control is performed.

(2) In the illuminating device 1 of the present embodiment, the shielding wall 30 is at least half the cross-sectional diameter of the neon tube 10, and the reflecting plate 20 is located at a height where the entire cross-sectional diameter of the neon tube 10 is not hidden. Since the upper wall 31 protruding upward is provided, the leakage current from one neon tube 10 can be blocked without flowing out to the other neon tube 10. Therefore, the light emission color can be controlled by mixing the light emission colors of the adjacent neon tubes 10 without dividing the light emission color for each neon tube 10.

(3) The illuminating device 1 of the present embodiment is provided with 10 neon tubes bent at both ends, the electrodes 5 are provided at the bent tips, and the shielding wall 30 has at least the electrodes 5 hidden, and the neon tube. Since the lower end wall 32 protruding downward from the reflecting plate 20 is provided up to a height position where at least half of the cross-sectional diameter of 10 is hidden, at least the electrodes 5 that are most susceptible to leakage current are shielded to a height position where they are all hidden. Therefore, the leakage current can be cut off reliably. Therefore, the lighting device 1 of the present invention does not cause the neon tube 10 to flicker or break even if the light control is performed.

(4) In the illuminating device 1 of the present embodiment, the shielding wall 30 is provided with the central wall 33 at the upper center of the reflector plate 20 in the longitudinal direction, so that the leakage current from one neon tube 10 is The neon tube 10 can be blocked without being discharged. Therefore, the lighting device 1 of the present invention does not cause the neon tube 10 to flicker or break even if the dimming control is performed.

(5) Since the lighting device 1 of the present embodiment is provided with the aluminum tape 40 having a width smaller than the radius of the neon tube 10 in the longitudinal direction at the position where the neon tube 10 faces the reflecting plate 20, The electric charge discharged between the electrodes 5 of the neon tube 10 can be guided from one electrode 5 to the other electrode 5 with the aluminum tape 40 serving as a proximity conductor, and the discharge can be stabilized. Therefore, the lighting device 1 of the present invention does not cause the neon tube 10 to flicker or break even if the dimming control is performed.
The width of the aluminum tape 40 described above is a width that does not affect the amount of light emission.

(6) In the lighting device 1 of the present embodiment, the upper wall 31 or the central wall 33 is at least half of the cross-sectional diameter of the neon tube 10, up to a height position where all of the cross-sectional diameter of the neon tube 10 is not hidden. Since it is extended upward from the reflecting plate 20, the leakage current is interrupted and, of course, the lighting device 1 as compared with a case where a wall is provided up to the height position of the upper end of the neon tube 10. Can be irradiated to the outside in a state in which the emission colors of the neon tube 10 emitting different colors are harmonized.

(Examples of changes to other embodiments)
The example which changed embodiment described above into other embodiment is shown below.
In the present embodiment, the neon tube 10 is described, but a discharge tube such as an EEFL tube (cold cathode tube) or a fluorescent tube may be used.
The shielding wall 30 may be a metal coated with white paint so as to reflect the light emitted from the neon tube 10. The coating material reflected by the reflector 20 and the shielding wall 30 is limited to white. Instead, it may be mirror-plated or with a reflective material.
-A plurality of neon tubes 10 are provided and arranged with different emission colors. However, all the neon tubes 10 may be arranged in the same color to perform light control.

It is the perspective view showing the state which removed the cover of the illuminating device of this embodiment. It is the end elevation which looked at the illuminating device of this embodiment from the side. (A) It is a top view of the reflecting plate in the illuminating device of this embodiment. (B) It is a front view of the reflecting plate in the illuminating device of this embodiment. (C) It is a bottom view of the reflecting plate in the illuminating device of this embodiment. (D) It is a right view of the reflecting plate in the illuminating device of this embodiment. It is the right view which expanded the reflecting plate in the illuminating device of this embodiment. It is sectional drawing of the bending part of the neon tube in the illuminating device of this embodiment. It is an effect | action figure expressed with the end elevation which looked at the illuminating device of this embodiment from the side. (A) It is a perspective view showing the internal structure of the conventional illuminating device. (B) It is an effect | action figure of the leakage current represented by the plane enlarged view which looked at the left end part of the neon tube of the conventional illuminating device from upper direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Illuminating device, 2 ... Wiring, 3 ... Transformer, 4 ... Holding tool, 5 ... Electrode,
6 ... fitting part, 7 ... housing, 8 ... cover, 9 ... wiring stopper,
10 ... Neon tube as a discharge tube, 11 ... Bent part, 12 ... Fitting part,
20 ... reflector, 21 ... transformer fixing hole, 22 ... gripping tool fixing hole,
23: Fixing hole for wiring stop, 24 ... Fitting piece,
30 ... shielding wall, 31 ... upper wall, 32 ... lower end wall, 33 ... central wall,
40: Aluminum tape.

Claims (5)

A lighting device having a configuration in which a plurality of discharge tubes are provided close to each other, high-frequency power is supplied to the electrodes of the discharge tubes to turn on the discharge tubes, and to adjust the light.
Provided below the discharge tube is a plate-like reflector that reflects the light from the discharge tube upward,
An illuminating device comprising a shielding wall made of a metal positioned between the discharge tubes, extending along the electrodes of the discharge tube, and blocking a leakage current generated from the discharge tube. The shielding wall is provided with an upper wall that protrudes upward from the reflector to a height position that is at least half of the cross-sectional diameter of the discharge tube and does not hide all of the cross-sectional diameter of the discharge tube. The lighting device according to claim 1. The discharge tube is provided by bending both ends, and includes the electrode at the bent tip.
2. The shielding wall is provided with a lower end wall projecting downward from the reflecting plate to a height position where at least all of the electrodes are concealed and at least half of a cross-sectional diameter of the discharge tube is concealed. Or the illuminating device as described in any one of Claim 2. The shielding wall extends in the longitudinal direction at the upper center of the reflecting plate and is at least half the cross-sectional diameter of the discharge tube, and from the reflecting plate to a height position where the entire cross-sectional diameter of the discharge tube is not hidden. The lighting device according to any one of claims 1 to 3, further comprising a central wall protruding upward. 5. The discharge tube according to claim 1, wherein an aluminum tape having a width smaller than a radius of the discharge tube is provided in a longitudinal direction at a position facing the reflection plate. The lighting device according to item.

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