JPH10283813A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire which can give a sense of shining brightness indoors and that without giving glare. SOLUTION: The luminance in the scope having a plumb angle of 60 degrees or more is suppressed under approximately 50 cd/m<2> by a louver 5 attached to the open area of the body 1 of a luminaire A. A high luminance light emission part 6 is held by a holding member 7 which is attached to the luminaire body 1 approx. in the center about the longitudinal direction of its opening. The high luminance light emission part 6 casts the light of a fluorescent lamp 3 to the scope having a plumb angle of 60 degrees or more. As a result, the louver 5 can prevent reflecting-in onto the screen of a display device or a glare in the same manner as in the conventional luminaire of a glare restricted type, and the high luminance light emission part 6 can heighten the luminance approximately in the horizontal direction and enhance a sense of brightness indoors.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting fixture installed indoors such as an office.

[0002]

2. Description of the Related Art FIGS. 12 (a) and 12 (b) show so-called direct mounting type and embedded type lighting fixtures 20, 21 which represent conventional lighting fixtures installed indoors such as offices, respectively. ing. These lighting fixtures 20 and 21 are generally called exposure-type lighting fixtures, and have a structure in which light is almost evenly distributed to a work surface such as a desk top surface while the lamp 3 is directly viewed.

[0003] However, the above-mentioned exposure type lighting fixtures 20, 2
In No. 1, although the light is distributed uniformly and has a sense of brightness, the lamp 3 enters the field of view and becomes glare (glare), or a display device (CRT) such as an OA device placed in an office or the like.
Etc.), the lamp 3 is reflected on the screen. In order to solve such a problem, there is a lighting fixture 22 shown in FIG. The luminaire 22 is generally called a glare-regulated luminaire. To prevent reflection glare on the screen of the display device, a louver 5 'is attached to the front surface (lower surface) of the luminaire main body 1; 'Restricts light distribution with an angle to the vertical direction (hereinafter, referred to as a "vertical angle") of 60 degrees or more, and reduces luminance.

[0004]

However, the glare-control-type lighting fixture 22 can reduce glare and reflection on a screen of a display device, but has a vertical angle of 6 mm.
Since the light distribution of 0 ° or more is restricted, there is a problem that the brightness in the vertical plane is insufficient and the sense of brightness of the entire room is impaired.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a lighting fixture that can make a room feel bright and bright without giving glare. is there.

[0006]

According to the first aspect of the present invention, there is provided a lighting apparatus which is installed indoors and has a substantially horizontal luminance suppressed in a part of a lighting apparatus main body. It is characterized by having a high-luminance light-emitting part with increased horizontal luminance, preventing glare and reflection on the screen of the display device as in the past, and at the same time, the high-luminance light-emitting part reduces the luminance in the substantially horizontal direction. It can be raised to improve the sense of indoor brightness.

According to a second aspect of the present invention, in the first aspect of the present invention, the high-luminance light-emitting portion is formed by a convex light-transmitting member protruding toward the front side of the instrument body.
The high-luminance light-emitting portion can be made to emit light using the light of the light source included in the lighting fixture, so that the configuration can be simplified and the cost can be reduced. According to a third aspect of the present invention, in the first or second aspect of the present invention, the high-brightness light-emitting portion is formed to have substantially the same shape in at least two substantially orthogonal directions in a substantially horizontal plane. The portion can increase the luminance in any direction in a substantially horizontal plane, and can similarly improve the sense of brightness in any direction in a substantially horizontal plane.

[0008] The invention of claim 4 is the invention of claim 1 or 2 or 3.
In the invention of the above, the high-luminance light-emitting portion is characterized in that the shape projected onto the front surface of the appliance body is formed in a rectangle having a side of about 40 mm, and the high-luminance light-emitting portion is reflected on a screen of a display device. There is no problem in practical use. According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, the high-intensity light-emitting portion is disposed substantially at the center of the front surface of the device main body. Inevitably, the high-brightness light emitting parts are arranged in an orderly manner.

A sixth aspect of the present invention is characterized in that in any one of the first to fifth aspects of the present invention, the luminance of the background portion where the high-luminance light-emitting portion is arranged is set to approximately 50 cd / m ² or less. And reflection on the screen of the display device can be further prevented. According to a seventh aspect of the present invention, in the second aspect of the present invention, a reflecting member for guiding at least light from a light source included in the lighting device to the high-luminance light-emitting portion is provided, and the high-luminance light-emitting portion emits light efficiently. Can be done.

According to an eighth aspect of the present invention, in any one of the first to seventh aspects of the present invention, there is provided a device for holding the high-luminance light-emitting section by means for preventing the light of the high-luminance light-emitting section from being reflected in a substantially horizontal direction. It is characterized by having a member, and glare and reflection on the screen of the display device can be further prevented. According to a ninth aspect of the present invention, in any one of the first to eighth aspects of the present invention, the high-intensity light-emitting portion is provided as a monitor for monitoring a lighting state of the lighting fixture. In spite of the light distribution being restricted, it is easy to determine whether or not the luminaire is turned on by the high-brightness light-emitting unit as the monitoring means.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments. Before that, the theory (the "sparkle theory" for the sake of explanation) underlying the present invention will be briefly described. The above sparkle theory is disclosed in
It is described in detail in Japanese Patent Publication No. 9306, and the point is that if the brightness in the vertical plane in the room is not sufficient, by arranging the high-luminance light emitting units in an appropriate size and in an appropriate number, the sense of brightness in the room is improved. It can be done. The appropriate size here is experimentally determined in the above publication and is given by the following equation.

3.3 ≦ log L ≦ −0.3 log ω + 2.63 where, ω: solid angle of apparent size [sr (steraradian)] L: luminance of light emitting section [cd / m ² ] , The luminance of the light emitting section is 4500 from the relation of glare and the like.
The effect is said to be the highest at 8000 [cd / m ² ].

Further, in the above publication, the appropriate number is set to 20 / sr, and it is also desirable that the light emitting units be arranged in an orderly manner. Hereinafter, an embodiment of the present invention based on the sparkle theory will be described with reference to FIGS. The basic configuration of the lighting fixture A according to the present embodiment is the same as that of the embedded glare-regulated lighting fixture 22 described in the description of the related art, and therefore, the common parts are denoted by the same reference numerals.

As shown in FIG. 1, a substantially box-shaped fixture main body 1 having an open lower side is embedded in a ceiling surface, and a pair of lamp sockets 2 are provided on upper surfaces of both longitudinal ends of the fixture main body 1. , 2 are provided, and a straight tube-type fluorescent lamp 3 is mounted in the lamp sockets 2, 2. Between the fluorescent lamp 3 mounted on the lamp sockets 2 and 2 and the upper surface of the fixture body 1, there is provided a reflector 4 for reflecting the light of the fluorescent lamp 3 downward.
Is arranged.

Further, a louver 5 is attached to the opening surface (front surface) of the instrument main body 1, and as shown in FIG. / M ² or less. As a result, similarly to the conventional glare-control-type lighting fixture 22, the light distribution in a substantially horizontal direction having a vertical angle of 60 degrees or more is restricted, and reflection on the screen of a display device such as an OA device can be prevented.

As shown in FIG. 3 (a), the high-luminance light-emitting portion 6, which is the gist of the present invention, has a plate-shaped light-transmitting member and a flange portion 6 around its periphery.
It is formed in a substantially quadrangular pyramid shape having a. However, as shown in FIG. 3B, a substantially translucent member is formed into a substantially quadrangular pyramid shape having a similar flange portion 6a as shown in FIG. May be formed in a substantially quadrangular pyramid shape by stacking the transparent members. Note that the shape of the high-luminance light-emitting portion 6 is not limited to a substantially quadrangular pyramid shape. For example, as shown in FIG. 4D, a plate-like light-transmitting member is formed in a substantially hemispherical shape having a flange 6a on the periphery. Alternatively, as shown in FIG. 7E, the light transmitting member may be formed in a substantially hemispherical shape from a group of light transmitting members.

With such a substantially quadrangular pyramid shape or a substantially hemispherical shape, the high-luminance light-emitting portion 6 has substantially the same shape in two directions substantially orthogonal to each other in a horizontal plane. 3) When the light of (3) is emitted in a substantially horizontal direction from the opening of the device main body 1, the light can be emitted in any substantially horizontal direction, and the brightness can be increased in any direction in a horizontal plane. There is an advantage that the sense of brightness can be similarly improved for people in all places in the room.

The high-luminance light-emitting portion 6 formed as described above
Is held by the holding member 7 attached to the opening of the instrument body 1. The holding member 7 is formed in a substantially quadrangular pyramid shape recessed into the inside of the instrument body 1 and has a rectangular mounting hole 7
a is provided. The flange 6a of the high-brightness light emitting section 6 is placed on the periphery of the mounting hole 7a, and the high-brightness light emitting section 6 is held by the holding member 7. Thus, when held by the holding member 7, the high-brightness light emitting section 6 protrudes downward from the opening surface of the appliance body 1.

By the way, as described later, the high-luminance light-emitting portion 6
Thus, the brightness in the substantially horizontal direction is increased and the sense of brightness is improved. However, even if the size and brightness of the high-brightness light-emitting portion 6 are the same, the background portion (the holding member 7) where the high-brightness light-emitting portion 6 is disposed The degree of improvement in the sense of brightness varies depending on the luminance of the image (including the peripheral portion of the image). In the table below, the luminance of one high-luminance light emitting unit 6 is 8000 [cd / m ² ], and the size (solid angle) is 0.0.
The result of performing a sensory evaluation experiment under the condition of 00035 [sr] is shown.

[0020]

[Table 1]

As is clear from the above table, in order to sufficiently improve the brightness, the luminance of the holding member 7 as well as the louver 5 must be suppressed to about 50 [cd / m ² ] or less. There is. Therefore, in the present embodiment, the holding member 7 is subjected to a matting process and a dark (black) coating. However, only one of them may be used. Alternatively, as shown in FIG. 5, the holding member 7 may be mirror-finished, and may be formed in a shape that does not reflect the light of the high-luminance light emitting unit 6 in a direction at a vertical angle of 60 degrees or more.

Incidentally, in order to further increase the luminance of the high-luminance light-emitting section 6, a reflecting member 8 for efficiently guiding the light of the light source (fluorescent lamp 3) to the high-luminance light-emitting section 6 may be provided in the instrument body 1. Such a reflection member 8 allows as much as possible of the light of the fluorescent lamp 3 to be incident on the high-brightness light-emitting portion 6 and emits the light incident on the high-brightness light-emitting portion 6 in a substantially horizontal direction as much as possible. The light is made to enter the high brightness light emitting section 6 at a shallow angle. For example, a substantially parabolic reflecting member 8 may be used as shown in FIG. 6, or a plate-like reflecting member 8 'may be used as shown in FIG.

In this embodiment, the rectangular mounting hole 7a of the holding member 7 is formed in a rectangular shape having a side of about 40 mm. Thereby, the effective dimension of the high-intensity light-emitting portion 6 protruding toward the opening surface side of the appliance body 1 through the mounting hole 7a becomes a rectangle having approximately the same side of the mounting hole 7a as about 40 mm. That is, according to the above equation, when the optimum luminance value L of the high luminance light emitting unit 6 is given by 4500 to 8000 [cd / m ² ], the solid angle ω is 0.00001 to 0.0004 [sr].
Becomes If this apparent size (solid angle ω) is replaced by the actual dimensions in a room with a ceiling height of 2.6 m, the high-brightness light emission with the highest brightness when the side is a rectangle of about 40 mm as described above. Since it has been clarified by experiments that the number of the parts 6 increases, in this embodiment, the shape of the projection of the high-intensity light-emitting part 6 on the front surface of the appliance body 1 (substantially coincides with the shape and dimensions of the mounting hole 7a) has one side. It is formed in a rectangle of about 40 mm.

When a sensory evaluation test was performed on the high-luminance light-emitting portion 6 formed in the shape and dimensions as described above to be reflected on the screen of the display device, 0% of the subjects were found to have trouble, and there was a problem with work. As a result, 60% of the subjects had no data and 40% of the subjects had not noticed. Therefore, if the projection shape of the high-luminance light-emitting unit 6 on the front surface of the appliance body 1 is formed as a rectangle having a side of about 40 mm as in the present embodiment, the size of the high-luminance light-emitting unit 6 can be made extremely small, so that it is less noticeable. The reflection luminance is reduced by the diffusion on the screen of the display device, and there is no problem in practical use.

FIGS. 8 to 10 show examples of the arrangement of the lighting fixture A on the ceiling A in this embodiment. For example, the lighting fixtures A are arranged vertically and horizontally at substantially equal intervals as shown in FIG. 8, or are arranged close to each other in the longitudinal direction of the lighting fixtures A and at substantially equal intervals in the width direction as shown in FIG. 9. Alternatively, as shown in FIG. 10, a set of four luminaires A is arranged in a rectangular shape. Here, in the present embodiment, since the high-luminance light-emitting portion 6 is held by the holding member 7 at substantially the center in the longitudinal direction of the fixture main body 1, even if the lighting fixture A is arranged as described above, the high-luminance light-emitting section 6 has high brightness. Since the light emitting unit 6 is arranged neatly on the ceiling a, the sense of brightness can be further improved.

As described above, according to the present embodiment, by providing the high-luminance light-emitting portion 6 having an increased luminance in a substantially horizontal direction in a part of the device main body 1, the conventional glare-controllable lighting device 22 is provided. Similarly, glare and reflection on the screen of the display device can be prevented, and at the same time, the high-luminance light-emitting section 6 can increase the luminance in a substantially horizontal direction to improve the feeling of indoor brightness. Also, in the case of the glare-regulated lighting device 22, it is difficult to determine whether or not the lighting device is lit because the light distribution is restricted. Monitoring means for monitoring
Although the light distribution in the substantially horizontal direction is restricted, it is easy to determine whether or not the lighting fixture A is turned on by the high-brightness light emitting unit 6.

In this embodiment, the case in which the louver 5 is attached to the opening surface of the instrument body 1 has been described. For example, as shown in FIG. Even when the high-luminance light-emitting portion 6 is held by the holding member 7 at a substantially central portion in the longitudinal direction of the prism panel 9 even in the one attached to the opening surface of the main body 1, exactly the same as the one using the louver 5 described above. The effect can be achieved.

Further, in the present embodiment, the lighting fixture A of the type arranged on the ceiling has been described as an example. However, the present invention is not limited to this. For example, the lighting fixture A arranged on a wall surface or a floor surface may be used. The technical idea of the present invention can be applied to this.
Further, in the present embodiment, the light source of the high luminance light emitting unit 6 is the fluorescent lamp 3 which is the light source of the lighting fixture A. However, a separate light source may be provided for the high luminance light emitting unit 6. Alternatively, the high-luminance light-emitting unit 6 may be used as a single lighting device as well as a general lighting device including the louver 5 and the like.

[0029]

According to the first aspect of the present invention, a high-brightness light-emitting portion having a substantially horizontal luminance is provided in a part of a lighting apparatus which is installed indoors and has a substantially horizontal luminance suppressed. This has the effect that glare and reflection on the screen of the display device can be prevented as in the past, and at the same time, the high-brightness light-emitting part can increase the brightness in the substantially horizontal direction and improve the sense of indoor brightness. There is.

According to a second aspect of the present invention, the high-brightness light emitting section is
Since it is formed of a convex light-transmitting member protruding toward the front side of the fixture body, it is possible to cause the high-luminance light-emitting portion to emit light using light from a light source included in the lighting fixture, thereby simplifying the configuration and reducing costs. There is an effect that down can be achieved. According to the third aspect of the present invention, since the high-luminance light-emitting portion is formed to have substantially the same shape in at least two substantially orthogonal directions in a substantially horizontal plane, the high-luminance light-emitting portion reduces luminance in an arbitrary direction in a substantially horizontal plane. Therefore, there is an effect that the sense of brightness can be similarly improved in any direction in a substantially horizontal plane.

According to a fourth aspect of the present invention, the high brightness light emitting section is
Since the shape of the projection onto the front surface of the appliance main body is formed in a rectangular shape having one side of approximately 40 mm, even if the high-brightness light-emitting portion is reflected on the screen of the display device, there is no problem in practical use, and it is convenient. effective. Claim 5
According to the invention, since the high-luminance light-emitting portion is disposed substantially at the center of the front surface of the device main body, if such a lighting device is disposed on the ceiling, the effect that the high-luminance light-emitting portion is inevitably arranged in an orderly manner is obtained. is there.

According to the sixth aspect of the present invention, the luminance of the background portion where the high-luminance light-emitting portion is arranged is set to approximately 50 cd / m ² or less, so that glare and reflection on the screen of the display device can be further prevented. There is. The invention according to claim 7 is provided with a reflecting member for guiding at least the light of the light source included in the lighting device to the high-brightness light-emitting portion, so that the high-brightness light-emitting portion can emit light efficiently.

The invention according to claim 8 is characterized in that a holding member for holding the high-luminance light-emitting portion with means for preventing the light of the high-luminance light-emitting portion from being reflected in a substantially horizontal direction is provided. There is an effect that reflection on the image can be further prevented. According to the ninth aspect of the present invention, the high-luminance light-emitting portion is used as monitoring means for monitoring the lighting state of the lighting fixture. Therefore, the light distribution in the substantially horizontal direction is restricted. There is an effect that it is possible to easily determine whether or not the lighting fixture is turned on by a certain high-luminance light emitting unit.

[Brief description of the drawings]

FIGS. 1A and 1B show an embodiment of the present invention, in which FIG. 1A is an external perspective view, and FIG. 1B is a sectional view taken along line XX of FIG. 1A.

FIG. 2 is a side sectional view of the same.

FIGS. 3A to 3E are side cross-sectional views of a high-brightness light emitting unit in the above light emitting device;

4A and 4B show the same as above, wherein FIG. 4A is an external perspective view, and FIG. 4B is a sectional view taken along the line YY in FIG.

FIG. 5 is a side sectional view showing another configuration of the above.

FIG. 6 is a side sectional view showing a configuration in which a reflection member is provided in the above.

FIG. 7 is a side sectional view showing another configuration in which a reflecting member is provided in the above embodiment.

FIG. 8 is a diagram showing an example of arrangement on a ceiling according to the first embodiment;

FIG. 9 is a diagram showing an example of arrangement on a ceiling according to the embodiment.

FIG. 10 is a diagram showing an example of arrangement on a ceiling according to the embodiment.

11A and 11B show another configuration of the above, wherein FIG. 11A is an external perspective view, and FIG. 11B is a sectional view taken along line ZZ of FIG.

FIGS. 12A and 12B are external perspective views each showing a conventional example.

FIG. 13 is an external perspective view showing another conventional example.

[Explanation of symbols]

 A lighting fixture 1 fixture main body 2 lamp socket 3 fluorescent lamp 5 louver 6 high brightness light emitting part 7 holding member

Claims (9)

[Claims] 1. A lighting device which is installed indoors and has a high-brightness light-emitting portion having an increased brightness in a substantially horizontal direction, as a part of a device body of the lighting device in which the brightness in a substantially horizontal direction is suppressed. Appliances. 2. The lighting device according to claim 1, wherein the high-luminance light-emitting portion is formed of a convex light-transmitting member projecting toward a front side of the device main body. 3. The lighting device according to claim 1, wherein the high-luminance light-emitting portion is formed in substantially the same shape in at least two substantially orthogonal directions in a substantially horizontal plane. 4. The luminaire according to claim 1, wherein the high-luminance light-emitting portion is formed in a rectangular shape whose projected shape on the front surface of the luminaire main body has a side of about 40 mm. 5. The lighting device according to claim 1, wherein the high-luminance light-emitting portion is disposed substantially at the center of the front surface of the device main body. 6. The lighting apparatus according to claim 1, wherein the luminance of the background portion on which the high-luminance light-emitting portion is arranged is set to approximately 50 cd / m ² or less. 7. The lighting fixture according to claim 2, further comprising a reflecting member for guiding at least light of a light source included in the lighting fixture to the high-brightness light emitting section. 8. The apparatus according to claim 1, further comprising a holding member for holding the high-luminance light-emitting portion, the device including means for preventing light of the high-luminance light-emitting portion from being reflected in a substantially horizontal direction. The lighting fixture according to 1. 9. The luminaire according to claim 1, wherein the high-luminance light-emitting section serves as a monitor for monitoring a lighting state of the luminaire.