JP2007287339A - Light guide plate of lighting unit for adjacent arrangement and lighting unit for adjacent arrangement using this - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a continuous illumination surface by adjacently arranging a large number of or a plurality of lighting units using a light guide plate on a wall face or the like and eliminating a linear dark spot between the lighting units caused by shadow of a light source support base and a rising member or the like of a housing. <P>SOLUTION: The lighting unit A is constituted by inserting and arranging a light guide unit 2 in which a light guide plate 20 is housed in a housing 10 having many LED light sources 14 arranged in a rising member 12 at the outside case 1 having a front plate with light diffusion function. In this case, an overhung light guide part 22 of cross-sectional L-shape of which lower face is inclined upward on the same face with the light guide face is arranged at the incident end face 21 facing the light source 14 of the light guide plate 20, and covers the rising member 12 of the housing 10 and the light source base 13 by the overhung light guide part 22. By this overhung light guide part 22, whole face illumination of the lighting unit A is secured and continuous illumination surface having no shadow of the rising member 12 or the like by the adjacent arrangement is obtained. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a light guide plate of an adjacently arranged illumination unit that is suitably used for, for example, continuously illuminating a wall surface of a building, and an adjacently arranged illumination unit using the same.

  An illuminating body using this kind of light guide plate is widely used as, for example, a liquid crystal backlight. In this case, in general, a light guide plate having a light guide pattern formed on the lower surface and a reflection plate or the like disposed on the lower surface of the light guide plate. Surface, a diffusing surface such as a diffusing plate disposed on the upper surface of the light guide plate, and a light source such as an LED or a cold cathode fluorescent lamp adjacent to the incident end surface of the light guide plate, and guides incident light from the light source. The light is incident on the light plate and is emitted from the upper surface of the light guide plate, that is, the light guide surface by the light guide pattern, so that surface emission is performed through the diffusion plate.

JP 2004-152555 A

  In addition to the liquid crystal backlight, the light guide plate is used for, for example, a display and a signboard. In this case as well, the basic structure is the same as that of the liquid crystal backlight, but an illumination unit using the light guide plate is further formed. However, by arranging a large number of them adjacent to each other, for example, it is possible to continuously illuminate the wall surface, floor surface, ceiling surface, etc. of the building. It is also possible.

  However, if an illumination unit body using a light guide plate is formed and arranged adjacent to each other, it is inevitable that a linear dark portion appears between the illumination unit bodies. That is, by using the light guide plate, the illumination unit body supports the light guide plate, the reflection plate, the diffusion plate, the light source, and the like. For example, the lighting unit body is stored in a box-shaped housing. Even if the light guide plate is placed using the light source plate, the light source is placed on the light guide plate in order to install the light source support base parallel to the light guide plate. The linear dark portion is formed by appearing between the illumination unit bodies so that these shadows partition the illumination surface at the end of the illumination surface of the illumination unit body. When the linear dark part is generated, the adjacent lighting units have the appearance of being divided by the dark part, and even if the lighting unit is intended to form a continuous illumination surface, the divided arrangement for each lighting unit is arranged. As a result, the illumination surface is formed and the appearance is impaired.

  The present invention has been made in view of such circumstances, and the problem to be solved is for adjacent arrangement suitable for performing continuous illumination by an illumination unit body by eliminating a linear dark part between adjacent illumination unit bodies. It is to provide a light guide plate of an illumination unit, and to provide an illumination unit for adjacent arrangement using the light guide plate.

  In accordance with the above-described problems, the present invention arranges an integrated overhanging light guide portion that expands the light guide surface (also referred to as a surface or an illumination surface) outwardly on the light guide plate. The overhanging light guide unit guides light and can illuminate the entire surface of the illumination unit body so as to enable continuous illumination without the linear dark portion of the adjacent illumination unit bodies. A light guide plate of an illumination unit that uses the invention according to item 1 so as to form a continuous illumination surface by arranging a plurality or a plurality of adjacent light guides, wherein the light guide surface is attached to a part or all of the end faces of the outer periphery. The light guide plate of the adjacently arranged illumination unit body is characterized in that an upwardly integrated light guide portion that expands in a laterally projecting manner is disposed.

  According to the second aspect of the present invention, the extension light guide part is disposed only on the support base of the light source, which is indispensable for supplying the incident light, or on the installation part of the support upright piece of the housing. The extended light guide part is arranged on the incident end face as a part of the outer periphery so that the entire surface of the illumination unit can be illuminated by the arrangement of the output light guide part. The light guide plate of the adjacently arranged illumination unit body according to 1 is used.

  According to a third aspect of the present invention, a reflection surface such as a reflection sheet is disposed on the lower surface of the overhanging light guide unit, thereby preventing a loss of incident light of the overhanging light guide unit and the overhanging light guide. In order to promote the light guide in the unit and make the entire surface of the illumination unit as uniform as possible without changing the light guide surface, the reflective unit is arranged on the lower surface of the projecting light guide unit. The light guide plate of the adjacently arranged illumination unit body according to claim 1 or 2, characterized in that.

  According to a fourth aspect of the present invention, the cross-sectional shape of the overhanging light guide section is formed so as to protrude from the end face of the light guide plate into an inverted V shape or letter shape, thereby effectively preventing irregular reflection of the overhanging light guide portion. In order to facilitate the light guide in the overhanging light guide section and to make the entire surface of the illumination unit as uniform as possible without changing from the light guide surface, The light guide plate of the adjacently arranged illumination unit according to claim 1 or 2, wherein the portion has a cross-sectionally inverted V shape or a L shape with the lower surface inclined upward toward the outside. is there.

  The invention according to claim 5 provides a light guide plate that can be used as a lighting fixture that replaces fluorescent lamps, etc. by continuously illuminating the wall surface, floor surface, ceiling surface, etc. of a building, and arranging a plurality of adjacent lighting on the ceiling. In order to provide the used illumination unit, this is an illumination unit that is used so as to form a continuous illumination surface by arranging a plurality or many of them adjacent to each other. A light source installation base for supplying incident light to the light guide plate by disposing an upwardly extending extended light guide portion that expands the light guide surface in an outwardly extended shape on the end surface or all end faces. The light source plate housing covers the upper end of the light guide plate housing, and is an adjacently arranged illumination unit.

  The present invention uses each of these as the gist of the invention as means for solving the above problems.

  Since the present invention is configured as described above, the invention according to claim 1 is arranged such that an integrated overhanging light guide portion is disposed on the light guide plate so as to expand the light guide surface outwardly. An overhanging light guide unit guides the entire surface of the illumination unit body so that continuous illumination without a linear dark portion of the adjacent illumination unit body is possible. A light guide plate can be provided.

  According to the second aspect of the present invention, in the second aspect of the present invention, the overhanging light guide portion is disposed only on the support base of the light source that is indispensable for supplying incident light, or only on the installation portion of the support upright piece of the housing. Thus, it is possible to illuminate the entire surface of the illumination unit body by arranging as few overhanging light guide portions as possible.

  According to a third aspect of the present invention, a reflective surface is disposed on the lower surface of the overhanging light guide section, thereby preventing a loss of incident light in the overhanging light guide section and guiding light in the overhanging light guide section. , And the entire surface of the illumination unit can be made as uniform as possible with the light guide surface.

  According to a fourth aspect of the present invention, the cross-sectional shape of the overhanging light guide section is formed so as to protrude from the end face of the light guide plate into an inverted V shape or letter shape, thereby effectively preventing irregular reflection of the overhanging light guide portion. In this way, the light guide in the overhanging light guide section can be promoted, and the entire surface of the illumination unit can be made as uniform as possible without changing from the light guide surface.

  The invention according to claim 5 provides a light guide plate that can be used as a lighting fixture that replaces fluorescent lamps, etc. by continuously illuminating the wall surface, floor surface, ceiling surface, etc. of a building, and arranging a plurality of adjacent lighting on the ceiling. The used illumination unit can be provided.

  Hereinafter, the present invention will be described in more detail with reference to an example of the drawings. A is an illumination unit used to form a continuous illumination surface by arranging a large number of adjacent walls on a building wall, for example. A includes an outer case 1 and a light guide unit (also referred to as a light guide module) 2 disposed in the outer case 1.

  In this example, the outer case 1 has a flat side surface, for example, made of a metal plate such as a resin plate on the front surface, a metal plate or resin plate on the three side surfaces, and a heat radiating hole (not shown) on the back surface. The box body is made of thick tiles with a single-piece or detachable resin plate, and is installed on the wall of the building, the floor slab surface, the joists installed on it, or the ceiling. The lighting unit A can be installed on the wall surface, floor surface, ceiling surface, etc. by fixing the back surface to the field edge using metal fittings such as screws and brackets or appropriate fixing means for bonding. At times, the outer dimensions are adapted to, for example, architectural modules so that they can be fixed and stored as efficiently as possible.

  In this example, the resin plate on the surface of the outer case 1 is made light-transmitting using, for example, a transparent or translucent resin, and the resin plate of the transparent or translucent resin is roughened. Thus, a light diffusing function is provided, the resin plate on the surface is used as a case component and a diffusion plate as a diffusing surface is also used, and the installation of the diffusing surface in the light guide unit 2 is omitted.

  The light guide unit 2 includes a housing 10, a light guide plate 20 disposed in the housing 10, and a light source 14 disposed on a support base 13 fixed inside the upright piece 12 of the housing 10. The light guide unit 2 is slidably inserted into the outer case 1 from the opening on one side thereof, and the reflection surface 25 is provided on the rear surface of the light guide plate 20 as necessary. It is designed to be fixed.

  In this example, the housing 10 is provided with a substrate 11 having an area substantially the same as the outer case 1 with both ends open, and an upright piece 12 whose height is set lower than the inner height of the outer case 1. It is made of a molded plate or an assembled and fixed resin or metal formed in a U-shaped cross-section with an upward opening, and can be slidably inserted into or fixed to the outer case 1.

  In the housing 10, the light source 14 is arranged on the opposite surface, that is, the inner side surface of the upright pieces 12 on both sides thereof. In this example, the light source 14 is a high-brightness chip LED, and the light source 14 The chip LED 14 is supported on a chip substrate that is formed to have a height slightly lower than that of the upright piece 12 in accordance with the length of the upright piece 12 on which the circuit is arranged, and the chip substrate is supported on the support base 13 of the light source 14. The light source 14 is arranged on the housing in the direction opposite to the inside thereof by fixing it to the upright pieces 12.

  The light guide plate 20 is made of a transparent resin such as acrylic with good light transmission, for example, by injection molding so that the front surface and outer peripheral end surface are integrally formed as a mirror surface. An unillustrated light guide pattern, such as a dot pattern, formed integrally or screen-printed, for example, is formed as one incident end face in the present example, and the other opposite end face as a reflective end face, The thickness of the housing 10 is a thick flat plate slightly higher than the standing height of the upright piece 12. At this time, the back surface of the light guide plate 20 and the opposing reflection end surface are covered with the entire surface. The reflection surface 25 is formed, and in this example, the reflection surface 25 is a reflection plate or a reflection sheet separate from the light guide plate 20, for example, a light source exhibiting high reflectance. The white sheet such as a polyester resin are fixedly arranged by fixing means such as adhesion.

  At this time, the light guide plate 20 is provided with an overhanging light guide portion 22 that expands the light guide surface outwardly on a part or all of the outer peripheral surface of the light guide plate 20. The overhanging light guide portion 22 is disposed on the opposite incident end face 21 as a part of the outer periphery of the light guide plate 20.

  That is, by arranging the light source 14 to face the light guide plate 20 and the incident end face 21 facing the light guide plate 20, the protruding light guide section 22 is placed on each incident end face 21 above, in this example. Is arranged so as to protrude outward from the upper end, flush with the light guide surface.

  The overhanging light guide portion 22 is integrally disposed on the light guide plate 20 by integrally molding the light guide plate 20 at the time of injection molding. At this time, the overhanging light guide plate unit 22 uses this as a mirror surface like the other surface of the light guide plate 20 to receive incident light from the incident end surface 21, particularly the other incident end surface 21 opposite to the overhanging light guide unit. Also in 22, the mirror reflection is performed to guide the light and to illuminate the upper surface.

  In the present example, the overhanging light guide portion 22 is formed in a cross-sectionally V-shaped or re-shaped shape in which the lower surface is inclined upward toward the outside, particularly a re-shaped shape that is flush with the light guiding surface. In addition, the reflecting surface 25 is arranged on the lower surface of the overhanging light guide portion 22. That is, the projecting light guide section 22 can have a cross-sectional shape of a square, a rectangle, a circle, an ellipse, or the like. The lower surface of the portion 22 has an inclined surface that is inclined upward toward the outside, effectively ensuring irregular reflection of incident light reaching the overhanging light guide portion 22 and promoting light guide in the overhanging light guide portion 22 In addition, by forming the reflection surface 25, it is possible to prevent a loss of incident light of the overhanging light guide portion 22 and to promote light guide in the overhanging light guide portion 22 as well. The entire surface of the illumination unit including the overhanging light guide 22 is made as uniform as possible to make it particularly suitable for continuous illumination.

  At this time, the overhanging light guide portion 22 has an inclined surface facing upward from an end surface of the light guide plate 20 that is slightly thicker than the upright piece 12 of the housing 10, in this example, an upper intermediate position of the opposite incident end surface 21. , The inclined surface is arranged so as to intersect with the extended line of the light guide surface of the light guide plate 20 which is slightly thicker than the upright piece 12, and the overhanging light guide portion 22 is flush with the light guide surface. The above-mentioned cross-section is in the shape of a letter.

  The light guide plate 20 faces the light incident surface 21 of the housing 10 facing the light source 14 of the housing 10, in this example, the high-brightness chip LED, so that the light source 14 faces the light incident end surface 21. The light guide unit 2 is formed by being housed and disposed at this time, and at this time, the overhanging light guide portion 22 of the light guide plate 20 is connected to the upper end of the installation base 13 of the light source 14 for supplying incident light to the light guide plate 20. In the example, the upper end of the LED substrate and the upper end of the housing 10 are covered, and in this example, the upper end of the upright piece 12 is covered.

  That is, since the LED board that forms the installation base 13 of the light source 14 has a slightly lower height than the upright piece 12, the LED board is arranged in a step with the upright piece 12, while the light guide plate 20 has its wall thickness increased. When the light guide plate 20 is arranged on the housing 10 by setting the projecting light guide portion 22 to be slightly higher than 12, and by making the projecting light guide portion 22 flush with the light guide surface, the projecting guide The upper end is covered by the light portion 22 being positioned above the upper end so as to cover the LED substrate and the upright piece 12.

  The light guide plate 20 has a slightly smaller width and length than the housing 10, and the light source 14 is arranged so that the width is substantially matched to the width between the LED substrates. In this example, the light guide plate 20 is not detached from the housing 10 without using a fixing means such as adhesion.

  The light guide unit 2 thus formed is slid and inserted into the outer case 1 to form the illumination unit A. At this time, the standing piece 12 of the housing 10 is connected to the inner height of the outer case 1. By setting the height lower than that, a gap is formed between the upper surface of the light guide plate 20 of the light guide unit 2 and the resin plate on the surface of the housing 10 which also serves as the diffusion surface in this example. Therefore, the diffusing surface diffuses the illumination light of the light guide plate 20 as effectively as possible so that the illumination can be as uniform as possible.

  In the figure, reference numeral 15 denotes a lead wire of the light source, and 24 denotes an upright closing plate that is integrally formed on the end surface of the light guide plate 20 or is attached later to close the gap between the outer case 1 and the light guide plate 20.

  Since the illumination unit A in this example is formed as described above, the entire surface is brilliant so that the luminance is uniform, and the adjacent illumination unit A, particularly the outer case 1, is disposed adjacently. Therefore, it was possible to achieve extremely favorable continuous illumination as if the wall surface was a single illuminating body, without appearing a line such as a shadow as well as a linear dark part.

  Although the illustrated example is as described above, the lighting unit is arranged adjacent to the above-mentioned wall surface, floor surface, ceiling surface, etc. to form a continuous illumination surface, and is arranged adjacent to the ceiling in series to form a fluorescent lamp. Use as lighting fixtures to replace lighting, etc., display patterns, letters, combinations of these, etc. on the surface of lighting units to make continuous lighting surfaces continuous lighting decoration surfaces, lighting signs, lighting displays, Assuming that the housing is provided with upstanding pieces on the outer peripheral four end faces, an overhanging light guide section is arranged on the four end faces of the light guide plate, and the overhanging light guide section is arranged at a middle position of the end face with a step difference from the light guide face. A cold cathode fluorescent lamp capable of supplying incident light to the incident end face, and other appropriate ones, and the outer case is formed of a plurality of members including a box having an upper surface opening and a diffusion plate having a diffusion function. Lighting unit body, light guide plate The specific shape and structure of the overhanging light guide unit, its reflecting surface, the light source and the housing for housing the light guide plate, the case in which the housing is mounted, the relationship between these, the addition to these, etc. are contrary to the gist of the invention. As long as it is not, it can be set as various forms.

It is a partially broken perspective view of an illumination unit. It is a disassembled perspective view of an illumination unit body. It is a fragmentary longitudinal cross-sectional view of an illumination unit body.

Explanation of symbols

DESCRIPTION OF SYMBOLS A Illumination unit body 1 Outer case 2 Light guide unit 10 Housing 11 Board | substrate 12 Standing piece 13 Support base 14 Light source 15 Lead wire 20 Light guide plate 21 Incidence end surface 22 Projection light guide part 23 Reflection end surface 24 Standing block plate 25 Reflection surface

Claims (5)

  A light guide plate of an illumination unit that is used so as to form a continuous illumination surface by arranging a plurality or a plurality of adjacent ones, and the light guide surface is extended outwardly on a part or all of the end surface of the outer periphery. A light guide plate of an illumination unit for adjacent placement, characterized in that an integral overhanging light guide is disposed.   2. The light guide plate of an adjacently arranged illumination unit according to claim 1, wherein the overhanging light guide part is arranged on the incident end face as a part of the outer periphery.   The light guide plate of the illumination unit for adjacent arrangement according to claim 1, wherein a reflection surface is disposed on a lower surface of the overhanging light guide unit.   4. The adjacently arranged illumination unit according to claim 1, 2 or 3, wherein the overhanging light guide section has a cross-sectionally inverted V shape or a L shape with the lower surface inclined upward toward the outside. Light guide plate. An illumination unit used to form a continuous illumination surface by arranging a plurality or many adjacently, and the light guide surface projects outwardly on a part or all of the outer periphery of the light guide plate in the illumination unit. And a light source plate housing that covers the upper end of the light source plate housing that supplies incident light to the light guide plate. Lighting unit for adjacent placement.

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