JP2009289427A - Shading device-cum-luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shading device-cum-luminaire with inexpensive construction using only one kind of light source, and capable of selectively irradiating indoors with diffused light and strong directional light by changing an operating condition if needed, when arranged at the lighting aperture of a building. <P>SOLUTION: The shading device-cum-luminaire 10 includes a plurality of slats 11 each arranged in parallel, narrow and long and rotation-free for shading and taking in an outdoor daylight, LEDs 14 arranged on the edge surface portion in a length direction of the slats 11, and a light guide plate 12 arranged on the slats 11. While the slats 11 shades the outdoor daylight, the light emitted from LED 14 and taken into the light guide plate 12 is diffused in the light guide plate 12 during its passage and irradiated in a room as a space for lighting. Also, while the slats 11 takes in the outdoor daylight, the light emitted from LEDs 14 is directly irradiated on an indoor ceiling and a floor. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a light-shielding device / lighting fixture.

  2. Description of the Related Art Conventionally, blinds to which an organic EL or LED film or the like is attached are known for use as illumination or a display.

  For example, a blind including a slat made of an EL sheet that emits light is known (see, for example, Patent Document 1). Furthermore, a blind including a solar cell, a sheet-like secondary battery, and a sheet-like light source on a slat is also known (see, for example, Patent Document 2). These blinds are installed on the indoor side of the window, and by rotating the slats, outside light is blocked and collected, and the room can be illuminated with the light source as a whole. However, these blinds are not suitable for illuminating a specific place such as an indoor floor or a ceiling because they cannot emit light having high directivity.

  Moreover, the blind which LED is installed in the edge part of a slat and can illuminate a specific place is known (for example, refer patent document 3). This blind can illuminate the floor, ceiling, etc. of the room by adjusting the opening angle of the slats, but is not suitable for illuminating the entire room because of its high directivity.

  Further, when the slat is in a substantially horizontal state, a light guide plate having an LED on the surface facing the slat, a reflecting material on the surface facing the slat, and having a diffusion portion between the slats is provided. A blind is known (see, for example, Patent Document 4). When the slat is in a state of blocking outside light, the light emitted from the LED passes through the diffusion portion of the light guide plate, so that the entire room can be illuminated. However, when light is emitted from the LED with the slats collecting external light, the light is reflected by the reflecting material of the adjacent slats and applied to the ceiling, and the floor of the room is strongly directional. Cannot illuminate.

Therefore, by installing the organic EL on the flat part of the slat and the LED on the end face part, the light from the organic EL can illuminate the entire room, and the light from the LED can illuminate the indoor floor and ceiling. Can be considered. However, since two types of light sources are required, the cost is high.
JP 2000-303758 A JP 2001-82058 A JP 2006-184561 A JP 2007-146395 A

  The present invention has been made in order to solve the above-described problem, and when used in a daylighting opening of a building with an inexpensive configuration using only one type of light source, the usage state is changed as necessary. Thus, an object of the present invention is to provide a light-shielding device / lighting fixture that can selectively irradiate diffused light and light having high directivity into a room.

  In order to achieve the above object, the invention of claim 1 is provided with a plurality of elongated slats arranged substantially parallel to each other and rotatable between a state of shielding external light and a state of collecting light. A light-shielding device combined lighting device, comprising: a light source provided on one end surface along the longitudinal direction of the slat; and a light guide plate that is provided on the slat and guides and emits light emitted from the light source. When the slat is in a state of shielding external light, the light from the light source is configured to enter the other end surface along the longitudinal direction of the adjacent light guide plate.

  According to a second aspect of the present invention, when the slat is in a state of collecting external light, the surface facing the lower side of the slat serves as an irradiation surface of the light guide plate, and the other surface reflects external light. It becomes a reflective surface.

  According to the first aspect of the present invention, when the slat is in a state of shielding external light, the light emitted from the light source and incident on the light guide plate is guided and diffused through the light guide plate, and the daylighting space. Irradiated into the room. Further, when the slat is in a state of collecting outside light, the light emitted from the light source is directly applied to the indoor ceiling or floor. Therefore, the diffused light and the highly directional light can be selectively irradiated into the room with one light source.

  According to the second aspect of the present invention, when the slat is in a state of collecting external light, the external light is reflected by the reflecting surface of the slat and applied to the ceiling, thereby obtaining an indirect illumination effect. it can. Further, when the slat is in a state of shielding the outside light, the outside light is reflected by the reflecting surface of the slat, thereby preventing the heat from getting into the room.

  Hereinafter, a light-shielding device combined use lighting fixture (hereinafter referred to as a lighting fixture) according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5A, 5B and 5C. As shown in FIGS. 1 and 2 (a) and 2 (b), the luminaire 10 of the present embodiment includes a plurality of elongated slats 11 that are provided substantially parallel to each other and are rotatable, and a slat 11 A rotation rope 18 for freely rotating the slat 11, and an ascending / descending rope 19 that passes through a through hole formed in the slat 11 and raises and lowers the slat 11. The luminaire 10 is installed on the indoor side of the window of the building, and can rotate the slat 11 to collect or block outside light.

  The slat 11 is provided by laminating the light guide plate 12, the light source holding unit 13 provided on the end surface along the longitudinal direction of the light guide plate 12, the LED 14 as the light source held by the light source holding unit 13, and the light guide plate 12. And the diffusing means 16 sandwiched between the light guide plate 12 and the reflecting material 15. The LED 14 is supplied with power by a conducting wire 17. The slat 11 is rotatable between a state in which external light is collected (hereinafter referred to as an open state) and a state in which external light is shielded (hereinafter referred to as a closed state) by operating the rotary rope 18. It is said that.

  The light guide plate 12 has an elongated shape with a certain thickness, and is provided on a surface facing the bottom of the slat 11 when the slat 11 is in a state of collecting external light (hereinafter referred to as an open state), and has a refractive index. Is formed of a transparent material having a value greater than 1, for example, a transparent acrylic resin or polycarbonate resin.

  The reflecting material 15 is a long plate-like shape, and includes a surface that reflects external light and a surface that reflects light that guides the light guide plate 12. When the slat 11 is in an open state, The surface facing is provided with the surface reflecting external light facing up. A general material such as a reflective sheet made of a synthetic resin can be used as the material of the reflective material 15, and the same material may be used for each surface, or different materials may be used.

  For example, a bullet-type white LED of a narrow-angle light distribution type can be used as the LED 14. The light source has a narrow-angle light distribution and may be a small light source, and a lamp or other light source may be used instead of the LED 14. The light source holding unit 13 includes a socket (not shown) for feeding the LED 14 to the slat 11 and a wiring (not shown) for supplying power to the socket. As a material of the light source holding part 13, a general socket and wiring can be used.

  The diffusing unit 16 applies white ink or transparent ink to the surface between the light guide plate 12 and the reflector 15 in a striped manner along the longitudinal direction, or etches the light guide plate 12 to make unevenness, etc. It is provided by the method. The shape pattern of the diffusing means 16 may be in the form of dots, pears or the like in addition to the stripes.

  The lower end of the ascending / descending rope 19 is attached to a bottom rail (not shown) provided at a position below the lowest slat 11. When the ascending / descending rope 19 is pulled up, the bottom rail ascends and ascends sequentially from the lower slat 11 so as to be lifted by the bottom rail. Conversely, when the ascending / descending rope 19 is pulled down, the bottom rail descends and returns to the position before ascending in order from the upper slat 11.

  Next, operation | movement of the lighting fixture 10 comprised as mentioned above is demonstrated. FIG. 3A shows the slat 11 in the open state, and FIG. 3B shows the slat 11 in the closed state. From the open state, the slat 11 pulls up the rotary rope 18 provided on the light source holding part 13 side in the direction of arrow A, and pulls down the other rotary rope 18 in the direction of arrow B. Rotate in the direction and close. When the slat 11 is in the open state, the light emitted from the LED 14 is directly applied to the room which is the daylighting space. Irradiation light is indicated by arrows. When the slat 11 is in the closed state, the light emitted from the LED 14 is incident on the longitudinal end face of the light guide plate 12 of the adjacent slat 11. The incident light repeats total reflection 21 on the surface of the light guide plate 12 and spreads over the entire light guide plate 12, is diffused 22 by the diffusion means 16, and when the incident angle on the surface of the light guide plate 12 increases, the light guide plate 12. Irradiated to the outside, that is, the room without being totally reflected 21 on the surface. Therefore, the slat 11 can selectively irradiate light with strong directivity and diffused light by changing its use state.

  4 (a), 4 (b), and 4 (c) show the appliance usage state when the LED is turned on at night or the like. The luminaire 10 is installed near the window 32 in the room 31. As shown in FIGS. 4A and 4B, when the slat 11 is in the open state, the highly directional light 33 emitted from the slat 11 changes the rotation angle of the slat 11 to change the rotation angle of the room 31. Illuminate a specific place such as the ceiling or floor. Further, as shown in FIG. 5C, when the slat 11 is in the closed state, the diffused light 34 emitted from the slat 11 irradiates the entire room 31.

  FIGS. 5A, 5B, and 5C show an appliance usage state in which the LED is not lit during the daytime or the like. As shown in FIGS. 4A and 4B, when the slat 11 is in the open state, the external light 35 transmitted through the window 32 is reflected by the reflecting material 15 by changing the rotation angle of the slat 11. The ceiling of the room 31 is irradiated, or the floor of the room 31 is irradiated without being reflected, and the light is collected. The reflected external light 35 illuminates the ceiling, so that the effect of indirect illumination can be obtained. Further, as shown in FIG. 6C, when the slat 11 is in the closed state, the external light 35 is reflected toward the outdoors by the reflecting material 15 of the slat 11. This makes it more difficult for heat to enter the room 31 than to simply shield it from light.

  In addition, this invention is not restricted to the structure of said embodiment, A various deformation | transformation is possible in the range which does not change the summary of invention. For example, a driving unit for rotating the slat 11 in the lighting fixture 10 and a sensor for detecting the brightness of the room may be further provided so that the brightness of the room can be automatically adjusted. .

The external view of the light-shielding device combined lighting fixture which concerns on one Embodiment of this invention. (A) is an external view of a slat used in the device, and (b) is a side view of the slat. (A) is a side view showing a state where the slat is in an open state and light is emitted from the LED, and (b) is a side view showing a state where the slat is in a closed state and light is emitted from the light guide plate. . (A) is a side view showing a state where the slat is in an open state and light emitted from the LED illuminates the ceiling, (b) is a side view showing a state where the light illuminates the floor, and (c) is a slat. FIG. 3 is a side view showing a state where light is diffused and irradiated from the light guide plate in a closed state. (A) is a side view showing a state in which the slat is in an open state and external light reflected by the reflector illuminates the ceiling, (b) is a side view showing a state in which the external light is collected, and (c) is a side view. The side view which shows the state which a slat is in a closed state and reflects external light with a reflecting material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Light-shielding device combined lighting fixture 11 Slat 12 Light guide plate 14 LED (light source)
DESCRIPTION OF SYMBOLS 15 Reflector 16 Diffusing means 31 Indoor 33 Light with strong directivity 34 Diffused light 35 Outside light

Claims (2)

In the light-shielding device combined lighting fixture provided with a plurality of elongated slats arranged substantially parallel to each other and rotatable between a state of shielding external light and a state of collecting light,
A light source provided on one end surface along the longitudinal direction of the slat;
A light guide plate that is provided on the slat and guides and emits light emitted from the light source,
A light-shielding device combined luminaire characterized in that when the slat is in a state of shielding external light, light from the light source is incident on the other end surface along the longitudinal direction of the adjacent light guide plate.   When the slat is in a state of collecting external light, a surface facing the slat is an irradiation surface of the light guide plate, and the other surface is a reflection surface that reflects external light. The light fixture combined with the light-shielding device according to claim 1.

Images