JPH056704A - Light distribution variable lighting device - Google Patents

Abstract

PURPOSE:To provide a light distribution variable lighting device capable of varying the light distributing directions and the light intensity CONSTITUTION:A linear light source L is fixed along the leveled distributing range optionally with extreme ease. end surface (light incident end surface) (a) of a laminated light guide body 2b formed by laminating a plurality of light guide plates P different in length, one side end surface of each guide plate P being arranged on the same level, and the other side surface being inclined in stairs, and a reflecting plate 2c is fixed along the other inclined side surface (light emitting end surface) (b) to form a face luminous lighting unit 2. A pair of the thus-formed face luminous lighting units 2 are pivotally supported by a rotation holding means A holding the units 2 from both sides in such a matter as to be mutually rotatable to optional angles, with the reflecting plates 2c of the units 2 being on the upper side and the receiving parts 2d of the respective linear light sources L being adjacent to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable light distribution surface emitting illuminator capable of arbitrarily changing a light distribution direction and a light distribution range.

[0002]

2. Description of the Related Art Conventionally, when changing the light distribution of illumination, it is common to move the illumination device itself or hold the illumination unit with a movable member or a flexible tube to change the light distribution direction. is there. Further, as surface emitting illumination, Japanese Patent Laid-Open No.
A light diffuser is disclosed in JP-A 1-246702.

[0003]

However, since the conventional example changes the direction of the light distribution as described above, the structure of the lighting device becomes complicated and expensive, and the lighting device is mounted. However, there was a problem that it was troublesome and difficult. Therefore, in this case, the light distribution direction is simply changed, and the light distribution range cannot be changed.

The present invention has been made in order to solve the above-mentioned problems of the conventional example. The illumination device can be mounted without any change from the conventional one, and the light distribution direction can be arbitrarily and easily arranged. It is possible to change the range of light in combination, and it is possible to perform bat wing light distribution with a desired direction evenly and with directivity, and it is possible to perform lighting that does not cause glare at all. An object is to provide a variable surface emitting lighting device.

[0005]

Therefore, the variable light distribution surface emitting illuminating device according to the present invention has a structure in which a plurality of light guide plates having different lengths are stacked so that one end face of each light guide plate is flush with one another. A linear light source is attached to the flush end surface of the laminated light guide whose side surfaces are inclined stepwise, and a reflection plate is attached to the other side surface that is inclined to form a surface emitting lighting unit. The pair of surface emitting lighting units thus formed have the reflection plate on the upper side, and the linear light sources are adjacent to each other, and the storage portions of the linear light sources are held so as to be rotatable from both sides at an arbitrary angle. A plurality of light guide plates having different lengths are stacked by being pivotally supported by a rotation holding means that is stacked, and one end surface of each light guide plate is flush with the other side surface and the other side surface is inclined stepwise. The laminated light guides are made to face each other with their flush end faces facing each other, and A linear light source is attached to one end face, and a highly flexible reflector is attached to the stepwise side faces of the pair of opposed laminated light guides and surrounds each linear light source. A surface emitting lighting unit is formed, the surface emitting lighting unit is held by a holding means, and a shape holding member is attached to an arbitrary portion of the surface emitting lighting unit of the variable light distribution illumination device according to claim 2. Furthermore, the laminated light guide body is intended to achieve the above-mentioned object by connecting a plurality of laminated light guide bodies in the width direction thereof.

[0006]

In the light distribution variable surface emitting lighting device according to the present invention having the above-described structure, a pair of opposed surface emitting lighting units are arranged in a desired position centering on the accommodating portion of the linear light source by the rotation holding means. By holding it rotatably at an angle,
Further, by deforming the flexible surface emitting lighting unit into an arbitrary shape and holding the shape by the shape holding member, the light distribution direction and the light distribution range can be combined and arbitrarily changed and adjusted very easily. .

Further, in any case, the bat wing light distribution having directivity is effectively illuminated, and the linear light source is completely surrounded by the reflection plate and does not enter the eyes, so that glare is not felt. .

Furthermore, by constructing a plurality of laminated light guides connected in the width direction, a laminated light guide for a wide lighting device can be obtained economically and very easily.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. (Structure) FIG. 1 is a side view of a main part of a ceiling-suspended variable light distribution illuminator showing an embodiment of the present invention, and FIG. 2 is an external perspective view of the embodiment.

In FIG. 1, reference numeral 1 is a variable light distribution illumination device, 2
Is a surface emitting lighting unit (hereinafter referred to as a lighting unit), 2
a is a high-intensity thin-tube fluorescent lamp (hereinafter referred to as a fluorescent lamp) having a diameter significantly smaller than that of a general fluorescent lamp which is an example of the linear light source L, 2b
Is a light-transmissive plate P having a different length formed of a material having excellent light-transmitting property such as methylmethacrylate polymer. Are aligned flush with each other and the other side surfaces are inclined stepwise (hereinafter referred to as a light guide), a is a light guide 2b.
Of the light guide 2b, and b is the other side surface of the light guide 2b that is inclined stepwise (hereinafter referred to as the light exit end). The light entrance end a has a linear light source. 2a
However, a reflecting plate 2c is attached to the light emitting end face b along the light emitting end face b, and the reflecting plate 2c is the fluorescent lamp 2a.
Is formed so as to surround and surround the periphery other than facing the light guide body 2b. S1, S2, S3, S4 and S5 are reflecting surfaces of the reflecting plate 2c that uniformly reflects the light projected from the side ends of the stacked light guide plates P in a predetermined direction. Reference numeral 3 is a holding member that constitutes the turning holding means A, and 3a is a support shaft that rotatably supports both sides of the housing portion 2d of the fluorescent lamps 2a of the pair of illumination units 2 and 2, respectively. Three
Holds the storage portions 2d, 2d of the fluorescent lamps 2a, 2a adjacent to each other so as to be rotatable from both sides, and the light emitting end face b of the light guide body.
With the reflection plate 2c that is attached to the lighting unit 2,
The two are held so as to face each other. Reference numeral 4 is a hanging string of the lighting device.

(Operation) An operation will be described based on the above configuration. In FIG. 1A, first, when the fluorescent lamps 2a, 2a are turned on, the light of each fluorescent lamp 2a is entirely projected by the reflecting plate 2c on the light incident end face a of the light guide 2b. This light is guided in each light guide plate P by repeating the total reflection toward the light emitting end face b by the same principle as that of the optical fiber, and is evenly distributed from the respective light guide plate P side ends of the light emitting end face b to the reflecting plate 2c. Is projected. This light is reflected from the reflecting surfaces S1 to S5 of the reflecting plate 2c evenly in a predetermined direction with directivity in the state of surface emission, and the light distribution intersecting with each other as shown by the arrows in the figure causes less uniform attenuation. Effectively illuminates a wide area with bright light. At this time, since all the fluorescent lamps 2a are surrounded by the reflector 2c and no direct light enters the eyes, glare is not felt at all. Next, when it is desired to concentrate the light distribution in a narrow range, as shown in FIG. 1B, the holding members 3 are folded inwardly with respect to each other.
The tip ends of the illumination units 2 and 2 are rotated around the support shafts 3a and 3a to adjust the angle to obtain a desired light distribution. Thereby, the illumination units 2 and 2 are held at a desired angle, and the light distribution can be concentrated and illuminated in a desired narrow range.

Further, when it is not necessary to turn on the lighting unit, the lighting units 2 and 2 can be rotated until they come into contact with each other. It can also be held in such a form.

The lighting unit 2 can be formed to be extremely thin, and has an excellent appearance both when it is turned on and when it is folded, and has a very unique and interior effect.

Next, another embodiment of the present invention will be described with reference to FIG. FIG. 3 is a side view of a main configuration of a light distribution variable surface emitting lighting device according to another embodiment. The same or corresponding parts as those in the above embodiment are designated by the same reference numerals.

In FIGS. 3A and 3B, 1A is a variable light distribution illumination device, 2A is a variable light distribution illumination unit, and 2e is a laminated light guide body having excellent flexibility (hereinafter referred to as a light guide body). 2f
Is the light guides 2e, 2 with the fluorescent lamps 2a, 2a outside each other.
e facing each other with the light emitting end faces b, b facing upward, surrounding the fluorescent lamps 2a, 2a, and the light emitting end face b of the light guide 2e,
It is a flexible reflector attached to b. A shape-maintaining member 3A constituting a holding means B is attached to the variable light distribution illumination unit 2A.

In the above structure, the light guides 2e, 2e and the reflection plate 2f are deformed into desired arc shapes by displacing the fluorescent lamps 2a, 2a inward as shown in FIG. It is held by the member 3A. Then, the light distribution can be concentrated and illuminated in a desired range from the reflecting surface R _{S of} the arc-shaped reflecting plate 2f.

In this embodiment, the shape retaining member 3A has been described as being attached to the reflecting plate 2f. However, the invention is not limited to this. If the reflecting plate 2f itself is formed of a flexible material capable of retaining the shape, it is possible. The shape retaining member can be omitted.

Further, in any of the above-mentioned embodiments, if a plurality of laminated light guides are formed so as to be connected in the width direction of the laminated light guides, a surface emitting lighting unit having a desired width can be extremely easily and economically produced. Obtainable.

[0019]

As described above, according to the present invention, the pair of surface emitting lighting units are arranged such that the linear light sources are adjacent to each other and face each other, and are rotatably held by the rotation holding means. In addition, since each pair of linear light sources and the flexible laminated light guide body are opposed to each other and the flexible light guide plate is integrally attached to form a flexible surface emitting lighting unit, the light distribution is achieved. The direction and range of can be very easily and arbitrarily changed, and illumination can be performed very effectively with light of the bat wing light distribution having uniform directivity. Since a plurality of laminated light guides are further connected in the width direction to form a laminated light guide,
A surface emitting lighting unit with a desired width can be obtained very easily and economically.

In addition to this, since the surface emitting lighting unit can be formed to be extremely thin, the lighting device itself can be formed to have an excellent appearance and a high interior effect.

[Brief description of drawings]

FIG. 1 is a side view of a configuration of main parts of a light distribution variable surface emitting lighting device according to an embodiment of the present invention.

FIG. 2 is an external perspective view of the above embodiment.

FIG. 3 is a side view showing the main configuration of a variable light distribution illumination device according to another embodiment of the present invention.

FIG. 4 is a perspective view showing the structure of a laminated light guide according to another embodiment.

[Explanation of symbols]

1,1A Variable light distribution illumination device 2,2A surface emitting lighting unit 2b, 2e laminated light guide 2c, 2f reflector 2d linear light source storage A rotation holding means B holding means a flush end face of light guide (light incident end face) b The inclined side surface of the light guide (light emitting end surface) L linear light source P light guide plate The same reference numerals in the drawings indicate the same or corresponding parts.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Reference number within the agency FI Technical indication location // F21S 1/00 F 7913-3K (72) Inventor Takehiko Sakurai 2-14, Ofuna, Kamakura-shi, Kanagawa No. 40 Mitsubishi Electric Corporation Life Systems Research Institute (72) Inventor Sadayuki Matsumoto 2-14-40 Ofuna, Kamakura City, Kanagawa Prefecture Mitsubishi Electric Corporation Life Systems Research Institute

Claims (4)

[Claims] 1. A plurality of light guide plates having different lengths are laminated, one end face of each light guide plate is aligned flush, and the other side face is inclined stepwise to form a line on the flush end face of the laminated light guide. -Shaped light source is attached, and a reflection plate is added along the inclined other side surface to form a surface-emission illumination unit, and the reflection plate of the formed pair of surface-emission illumination units is on the upper side, and respectively. 2. The variable light distribution illuminating device, wherein the linear light sources are pivotally supported by a rotation holding means which adjoins the linear light sources and holds the housing portions of the linear light sources so as to be rotatable from both sides at an arbitrary angle. 2. A laminated light guide body in which a plurality of light guide plates having excellent flexibility and different in length are laminated so that one end surface of each light guide plate is flush and the other side surface is inclined stepwise. The end faces are flush with each other and are opposed to each other, a linear light source is attached to each of the end faces, and each of the lines is attached to the stepped side faces of the pair of laminated light guides facing each other. A variable light distribution illuminating device, characterized in that a flexible reflecting plate surrounding a flat light source is arranged to form a surface emitting lighting unit, and the surface emitting lighting unit is held by a holding means. 3. The variable light distribution illumination device according to claim 2, wherein a shape maintaining member is attached to an arbitrary portion of the surface emitting illumination unit of the variable light distribution illumination device according to claim 2. 4. The variable light distribution illumination device according to claim 1, wherein the laminated light guide body is formed by connecting a plurality of laminated light guide bodies in a width direction of the laminated light guide body.