JP2012248518A - Planar lighting system of light guide face cross arrangement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To illuminate exhibited display, partition or the like of commodities with a plurality of light guide faces, irrespective of their sizes.SOLUTION: A cross-section U-shaped rest string 3 arranged at a center position of one of the cross-arranged light guide faces 1a is made to cross the other cross-arranged light guide face 1b and to hold it, and planar illumination of both the light guide faces 1a, 1b is to be carried out by LED light sources 8 at a bottom wall and outside faces of the rest string 3. Each light guide face is covered with a surface cover 41 and a coating case 5 of opaque white with light-diffusing properties, whereby a frameless planar lighting system A in a T shape can be realized. The light guide faces 1a, 1b can be maintained at an ambient temperature by conducting heat emitted from the light sources 8 to a heat sink of the one cross-arranged light guide face 1a.

Description

  The present invention relates to a surface lighting device having a crossing arrangement of light guide plates that can be used for various applications such as merchandise display shelves, displays for display, and partitions.

  For example, in order to illuminate a display shelf of a product, the following Patent Document 1 discloses that LED linear light sources installed on a ceiling are arranged in three rows, a central linear light source is used for floor illumination, and two end portions The linear light source is used for lighting a pair of display shelves arranged opposite to each other across the floor surface. Patent Document 2 listed below illuminates a table installed under a shelf with a shelf, and places a shelf plate on left and right brackets supported by a column and illuminates a triangular cross section on the lower surface side of the shelf plate between the left and right brackets. A space is arranged, a linear light source is installed at a deep position in the illumination space, the illumination space is covered with an inclined light diffusion plate, and a table arranged below the shelf plate is illuminated. Further, for example, as an example in which the partition is illuminated, the following Patent Document 3 arranges the linear light source of the upward LED on the upper frame of the partition, and on the upper side of the linear light source, the space is spaced downward from this. A reflection frame having a triangular cross-section is disposed, and the light source light of the linear light source is reflected downwardly on the front and back of the partition to illuminate the vicinity thereof.

  On the other hand, this type of surface illumination device, for example, a liquid crystal backlight, includes a light guide plate, a linear light source at an incident end surface thereof, and light diffusion on the surface of the light guide plate, as shown in Patent Document 4 according to the inventor's proposal. It is known to form a sheet and a reflective sheet on the back surface of the light guide plate.

JP 2010-218922 A JP 2008-91185 A JP 2010-189836 A Japanese Patent Laid-Open No. 08-254618

  According to Patent Documents 1 to 3, a linear light source can illuminate a table and a partition lower part of a display shelf. For example, the display shelf and the partition can be formed by a surface lighting device, an existing display shelf, By forming a display for use in a display case, it is possible to directly illuminate products on display shelves and displays, and to increase customer purchasing motivation. In the case of a partition, it is expected that the partition surface of the partition can be directly illuminated, and a comfortable meeting space can be secured.

  However, in order to effectively use various surface lighting devices such as these display shelves, display displays, and partitions, it is not limited to illuminating a single surface, but by simultaneously arranging light guide surfaces, In the case of the above display shelves and display, the customer's willingness to purchase various products such as jewelry, luxury goods, and luxury clothing can be further enhanced. As a result of attracting customers' attention as shelves and display displays shine, it is expected to be able to further attract customers, and in the case of partitions, it is possible to make a meeting surrounded by brilliant partitions It is expected that a favorable environment can be secured and the usability can be improved not seen in the prior art. Also of the building interior other than, furniture, etc., if applied to various types of goods regardless of the size, it is possible to improve its commercial value.

  Illumination by a plurality of light guide surfaces can be performed, for example, by fixing the light guide surfaces configured independently from each other at a predetermined angle by a fixing means such as a hinge. Since it is necessary to arrange the outer frame so as to surround it on the surface and to fix it through the outer frame, the outer frame appears on the surface of the illumination surface so as to define the light guide surface, giving a sense of complexity. In addition, the fixing means used for fixing is likely to impair the appearance by being exposed between the light guide surfaces, particularly at the corners thereof. Therefore, a plurality of light guide surfaces can be formed while ensuring good appearance. It is not always easy to place them crossing.

  The present invention has been made in view of such circumstances, and the problem to be solved is that a plurality of light guide surfaces can be arranged in an intersecting manner so that simultaneous surface illumination can be achieved and the light guide surfaces can be arranged in an intersecting manner as good as possible. An object of the present invention is to provide a surface illuminating device having a light guide surface crossing arrangement that can have an external appearance.

  In accordance with the above-described problems, the present invention has a plurality of light guide surfaces as a base and a light guide surface that forms an intermediate plate or an end plate thereof. A cross-shaped U-shaped receiving strip is embedded in the crossing position of the other light guiding surface, and the other light guiding surface is crossed by the receiving strip. Holding and illuminating one light guide surface intersecting with the linear light source on one or both sides of the outer wall of the receiver, and illuminating the other light guide surface intersecting with the linear light source on the bottom wall of the receiver, The light guide surface of one cross and the light guide surface of the other cross are directly attached. That is, the light guide surface according to claim 1 is crossed with one light guide surface. A surface illumination device configured to perform surface illumination with the other light guide surface, the end or intermediate position of the one light guide surface intersecting A U-shaped receiving strip that cross-holds the other light guide surface by being embedded, and one light guide surface and the other cross intersecting the outer wall and the bottom wall on one or both sides of the receiver. The present invention provides a surface illumination device having a light guide surface crossing arrangement characterized by comprising linear light sources directed in a plurality of intersecting directions for supplying incident light to the light guide surface.

  In addition to the above, the invention according to claim 2 is configured such that the linear light source arrangement form of the one light guide surface is variable according to the arrangement form of the one light guide surface and the other light guide surface. In order to make the brightness of one light guide surface appropriate, this is set so that the embedding arrangement of the U-shaped receiving section is both an end portion and an intermediate position of one crossing light guide surface, and 2. The surface illumination device according to claim 1, wherein a linear light source that supplies incident light to one of the intersecting light guide surfaces is one of the end portion or the intermediate position. Is.

  In addition to the above, the invention according to claim 3 is arranged such that one or a plurality of intersecting other light guiding surfaces are orthogonal to one intersecting one light guiding surface, and one intersecting one light guiding surface and the other intersecting other The overall arrangement of the light guide surfaces is, for example, L-shaped, T-shaped, E-shaped, F-shaped, etc., with an appropriate cross-sectional shape so that it is easy to use depending on the application. The cross-holding of the crossing light guide surface with respect to the crossing one light guide surface is performed orthogonally, thereby arranging the crossing T light guide surface with respect to the crossing one light guide surface. It becomes a shape or L shape, It is set as the surface illumination apparatus of the light guide surface crossing arrangement | positioning of Claim 1 or 2 characterized by the above-mentioned.

  In addition to the above, the invention described in claim 4 improves the completeness of the surface illumination device, houses the light guide surface on one of the intersections in a box, and covers the illumination surface with a light diffusing surface cover. On the other hand, by covering the other light guide surface in a bag shape with the same light diffusing cover case, the accommodation and appearance of the one light guide surface and the other light guide surface are made as good as possible. In addition, in order to ensure the uniformity of the luminance of the light guide surface as much as possible, the crossing one light guide surface, including the light guide plate, and the light guide plate including its outer peripheral end And a light diffusing surface cover that closes the opening surface of the box so as to cover the surface of the light guide plate excluding the receiving portion of the U-shaped cross section, and the other light guide surface of the intersection Except for the light guide plate and the insertion end where the end of the light guide plate on the cross holding side is exposed. The light guide plate is provided with a light diffusing covering case that covers the front and back surfaces and the three end surfaces of the light guide plate in a box shape, and the insertion end portion of the light guide plate on the other light guide surface is A part or all of the four end faces of the covering case that is inserted into a U-shaped receiving strip and defines the outer periphery of the insertion end portion are arranged in contact with the surface cover of the one light guide surface. It is set as the surface illumination apparatus of the light guide surface crossing arrangement of Claim 1, 2 or 3.

  In addition to the above, the invention according to claim 5 is suitable for the surface illumination of the luminance of the surface cover of the crossing one light guide surface and the covering case of the other light guiding surface of the crossing. The surface cover of the crossing one light guide surface and the covering case of the crossing other light guide surface are milky white so that they can be used for various purposes such as the display shelf and the partition. It forms with the light-transmitting synthetic resin material to exhibit, It is set as the surface illumination apparatus of the light guide surface crossing arrangement | positioning of Claim 4 characterized by the above-mentioned.

  In the invention according to claim 6, in addition to the above, the linear light source on one of the light guide surfaces is located below the surface cover, so that the brightness in the vicinity of the receiving portion is partially increased. To prevent non-uniformity due to abnormal brightness to occur as easily and reliably as possible, to prevent or reduce the transmission near the ridge, and to ensure uniformity in the surface cover, An L-shaped or thick abnormal luminance preventing leg is inserted into the box so as to reach between the linear light source arrangement position of the light guide surface of the reference surface and the end position of the light guide plate in the surface cover. The surface illumination device according to claim 4 or 5, wherein the surface illumination devices are arranged so as to intersect light guide surfaces.

  In addition to the above, the invention according to claim 7 is configured so that the heat generation of the linear light source on the light guide surface at one of the intersections can be prevented as effectively and reliably as possible. A heat radiation plate is disposed between the light guide plate of the light guide surface and the bottom wall of the box, and a standing end is disposed on the receiving side of the heat sink having a U-shaped cross section, and a linear light source on the outer wall of the receiving member. Is installed through the standing end portion, and the surface illumination device having the light guide surface crossing arrangement according to claim 4, 5 or 6.

  In addition to the above, the invention described in claim 8 is to use the linear light source as an LED light source by an LED bar so that the linear light source is durable and power-saving. The surface illumination device according to claim 1, 2, 3, 4, 5, 6 or 7, wherein the light guide surfaces intersect each other.

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

  Since the present invention is configured as described above, the invention described in claim 1 includes a plurality of light guide surfaces as a base, and an intersecting one light guide surface corresponding to the base as an intermediate plate or an end plate thereof. A cross U-shaped receiving strip is embedded in the crossing position of the other light guiding surface, and the other light guiding surface is cross-held by the receiving strip. And the light guide surface of one of the crosses is illuminated by a linear light source on one or both sides of the outer wall of the strip, and the other light guide surface is illuminated by the linear light source of the bottom wall of the strip. By directly attaching one light guide surface and the other light guide surface, a plurality of light guide surfaces can be arranged in an intersecting manner so that simultaneous surface illumination can be achieved and the light guide surfaces can be arranged in an intersecting manner. Therefore, it is possible to provide a surface illumination device having a light guide surface crossing arrangement that can achieve a good appearance.

  In addition to the above, the invention according to claim 2 is configured such that the linear light source arrangement form of the one light guide surface is variable according to the arrangement form of the one light guide surface and the other light guide surface. The luminance of one light guide surface can be optimized.

  In addition to the above, the invention according to claim 3 is arranged such that one or a plurality of intersecting other light guiding surfaces are orthogonal to one intersecting one light guiding surface, and one intersecting one light guiding surface and the other intersecting other The overall arrangement of the light guide surface may be an appropriate cross-sectional shape such as an L shape, a T shape, an E shape, an F shape, etc. it can.

  In addition to the above, the invention described in claim 4 improves the completeness of the surface illumination device, houses the light guide surface on one of the intersections in a box, and covers the illumination surface with a light diffusing surface cover. On the other hand, by covering the other light guide surface in a bag shape with the same light diffusing cover case, the accommodation and appearance of the one light guide surface and the other light guide surface are made as good as possible. In addition, the luminance uniformity of the light guide surface can be ensured as good as possible.

  In addition to the above, the invention according to claim 5 is suitable for the surface illumination of the luminance of the surface cover of the crossing one light guide surface and the covering case of the other light guiding surface of the crossing. It can be used for various purposes such as the display shelf and the partition.

  In the invention according to claim 6, in addition to the above, the linear light source on one of the light guide surfaces is located below the surface cover, so that the brightness in the vicinity of the receiving portion is partially increased. Nonuniformity due to abnormal luminance can be reliably prevented by making it as simple as possible, and transmission in the vicinity of the ridge can be prevented or lowered to ensure uniformity in the surface cover. .

  In addition to the above, the invention according to claim 7 can effectively and reliably prevent the heat generation of the linear light source on the crossing one light guide surface as much as possible.

  In the invention described in claim 8, in addition to the above, the linear light source can have high durability and low power consumption.

It is a perspective view of a surface illumination device. It is a disassembled perspective view of a surface illumination device. It is an expansion longitudinal cross-sectional view of the light guide surface intermediate part of the crossing one of a surface illuminating device. FIG. 4 is an enlarged longitudinal sectional view showing a state where a light guide surface on the other side of the cross in FIG. 3 is removed. It is a conceptual diagram which shows the other example of a shape of a surface lighting apparatus.

  Hereinafter, the present invention will be described in more detail with reference to the example of the drawings. A is in this example, for example, accommodated in a division section of a display shelf, accommodated in an interior space of a showcase, As a display that is used to display and display a predetermined product as if it is placed on the upper surface, surface illumination is performed by one light guide surface 1a intersecting and the other light guide surface 1b intersecting and disposed therewith. A light illuminating device having a crossed arrangement of light guide surfaces, wherein the surface illuminating device A is arranged to be embedded in an end portion or an intermediate position of the crossed one light guide surface 1a, thereby crossing the other light guide surface. A receiving strip 3 having a U-shaped cross section for cross-holding 1b, and one light guide surface 1a that intersects the outer wall on one side or both sides of the receiving strip 3, in this case both the outer wall and the bottom wall, respectively. An intersection that supplies incident light to the other light guide surface 1b. There as having a linear light source 8 toward the plurality of directions.

  In this example, the surface illumination device A having the light guide surface intersecting arrangement is configured so that the light guide surface 1b of the other cross intersects with the light guide surface 1a of the intersecting one by crossing the light guide surface 1b. The arrangement of the other light guide surface 1b intersecting the surface 1a is T-shaped or L-shaped in cross section.

  The surface illumination device A of this example has, for example, one crossing light guide surface 1a for back lighting having a height of 30 cm and a length of 60 cm or more, and the one light guide surface 1a in the cross direction at an intermediate position in the longitudinal direction, particularly at the center position. The apparatus A is provided with a cross-holding light guide surface 1b for lateral illumination, which is cross-held so as to protrude to the front side, and the crossing one light guide surface 1a is divided into left and right parts, and the height and the protrusion width are 30 cm. Is formed in a T-shaped cross-section, and is installed in a stationary manner so as to form an upward T-shape in a plane. In this example, the thickness of the light guide surface 1a at one of the intersecting ones is This is 2 to 2.5 cm, and the thickness of the other light guiding surface 1b is about 1 cm.

  At this time, the one light guide surface 1a intersecting with the light guide plate 2 excluding the light guide plate 2, the box 4 containing the light guide plate 2 including its outer peripheral end, and the receiving strip 3 having the U-shaped cross section. A light diffusing surface cover 41 that covers the opening surface of the box 4 is formed so as to cover the surface of the light plate 2, and the light guide surface 1 b that intersects the other light guide is the same as the light guide plate 2 and the light guide plate 2. The light guide plate 2 is provided with a light diffusing coating case 5 that covers the front and back surfaces and the three end surfaces of the light guide plate 2 in a box shape except for the insertion end portion 22 where the end portion on the cross holding side is exposed. One of the four end surfaces of the covering case 5 that inserts the insertion end portion 22 of the light guide plate 2 on the optical surface 1b into the receiving strip 3 having a U-shaped cross section of the one light guide surface 1a intersecting and defines the outer periphery of the insertion end portion. The part or the whole is arranged in contact with the surface cover 41 of the light guide surface 1a on one of the crosses.

  The light guide plate 2 of each light guide surface is a thick resin, for example, about 0.5 cm transparent resin plate in this example, such as acrylic and polycarbonate each having a high light transmittance, and a light guide pattern on the back surface thereof. The light guide pattern is subjected to density modulation from the incident end face 21 side to the opposite reflecting end face side, forming dots, lines, etc. or screen printing, in this example screen printing. The linear light source 8 erected on the incident end surface 21, in this example, the light source light incident from the LED light source by the LED bar is guided toward the reflecting end surface, and the dot of the pattern The diffused light such as a line is arranged on the back surface of the light guide plate 2, and in this example, the light is reflected toward the surface side by the reflection surface 7 arranged on the surface of the heat radiating plate 6, which will be described later. Level the whole surface And effectively and bright, there the light guide surfaces 1a, 1b, as a surface illumination.

  The surface cover 41 of the crossing one light guide surface 1a and the covering case 5 of the other crossing light guide surface 1b are formed of a light-transmitting synthetic resin material exhibiting a milky white color tone. In the apparatus A, the box 4 of the light guide surface 1a at one of the intersections is also formed of the same synthetic resin material as the surface cover 41 and the covering case 5, so that the back and side surfaces of the box 4 are the same as the illumination surface. As a product that exhibits a milky white color tone, it is suitable for exhibiting the product as an item for lighting display of the product.

  These light-transmitting synthetic resins are made of a transparent synthetic resin such as acrylic or polycarbonate in the same manner as described above, for example, thinner than the light guide plate 2, for example, a common thickness of 0.2 to 3 cm, and a light diffusion pigment. It is formed by processing and assembling a molded plate formed by adding and forming.

  At this time, the box 4 has a height, a length and a thickness of one light guide surface 1a intersecting the surface lighting device A, and has a deep bottom wall having an opening on the front side facing the one light guide surface 1a. In addition, the receiving strip 3 having a U-shaped cross section is arranged in the box 4 at a central position in the longitudinal direction.

  The ridge 3 having a U-shaped cross section is made of a metal having good heat conductivity, in this example, made of aluminum, and the metal plate is bent into a U-shaped cross section, Is divided into left and right to cross the box 4 space at the center position, and has a height corresponding to the depth of the box 4 from the bottom surface to the upper end of the box 4, according to the thickness of the cross light guide plate 2. The light guide plate 2 has a groove width slightly wider than that of the light guide plate 2 so that the insertion end 22 on the incident end face 21 side of the light guide plate 2 can be freely inserted. In this example, the LED bar of the LED light source is arranged so as to extend over its entire length.

  Further, in this example, the bottom surface of the box 4, that is, each bottom surface divided into two on the left and right by the receiving ridge 3, is also made of a metal having excellent thermal conductivity, and in this example, a heat sink made of aluminum. 6 is arranged, and at this time, a reflective surface 7 of a highly reflective metal or synthetic resin is formed on the surface of the heat radiating plate 6 so as to effectively perform surface illumination of the light guide pattern. In this example, the reflecting surface 7 is formed by disposing, for example, a polyester foam resin sheet on the entire surface.

  In this example, the heat radiating plate 6 is an upright end formed by integrally erecting, for example, about 0.5 cm on the end portion of the U-shaped receiving strip 3 side, that is, the longitudinal center position side of the box 4. The linear light source 8, in this example the LED bar of the LED light source, is arranged toward the inside of the heat sink 6 surface of the standing end 61. It is assumed that the linear light source 8 on the outer side wall is indirectly installed with respect to the receiving strip 3 through the standing end portion 61.

  At this time, the standing end portion 61 of the heat radiating plate 6 is in contact with the outer side surfaces on both sides of the receiving section 3 having a U-shaped cross section so that the heat generation of the linear light source 8 of the receiving section 3 The heat can be conducted to the heat radiating plate 6 to radiate the heat.

  The surface cover 41 is made of a light diffusing synthetic resin as described above. On the other hand, the linear light source 8 on the light guide surface 1a intersecting one side, in this example, the arrangement position of the LED bar and the light guide plate 2 are used. In this example, an inverted L-shaped leg portion 42 for preventing abnormal luminance is arranged to be inserted into the box 4 so as to reach between the end positions. Since the leg portion 42 is positioned on the linear light source 8 and the light guide plate 2, the linear light source 8, that is, the light source light of the LED light source, directly acts on the surface cover 41 of the light-transmitting synthetic resin. The end portion of the surface cover 41 is prevented from exhibiting abnormal luminance, and the end portion has a luminance equivalent to that of other portions of the surface cover 41.

  The covering case 5 has an opening on the side of the insertion end 22 so as to cover a total of five surfaces including the front and back surfaces and the three end surfaces excluding the insertion end 22 on the incident end surface 21 side of the light guide plate 2 in the other light guide surface 1b. Then, according to the area and thickness of the light guide plate 2, the light guide plate 2 can be received and covered with a thin box shape. In this example, the insertion end portion 22 has a U-shaped cross section. The linear light source 8 has a protruding width minus the thickness of the LED bar in the present example from the groove depth of the receiving strip 3, and the covering case 5 has a protruding width of the insertion end 22. The storage space for covering the light guide plate 2 is provided, and the opening side end portion is configured to form a flush end surface.

  The light guide plate 2 has its incident end face 21 directed toward the linear light source 8 side of the U-shaped receiving strip 3, and the light guide plate 1 of the box 4 on the crossing one of the light guide surfaces 1 a, in this example. In this case, the light guide pattern is arranged on the reflection surface 7 arranged on the back surface, the front cover 41, the leg portion 42 for preventing the abnormal luminance, and the incident of the light guide plate 2 in the box 4. It is assumed that it is placed on the end portion on the end surface 21 side so as to close the opening on the upper surface of the box 4, while the light guide plate 2 of the other light guide surface 1 b is housed in the covering case 5, and its insertion end The portion 22 is inserted and held in the groove of the receiving strip 3 having a U-shaped cross section, and the other light guide surface 1b is held crossed with the other light guide surface 1a. At this time, the covering case 5 of the other light guide surface 1b is such that a part or all of the end face is in contact with the end portion of the surface cover 41 of the one light guide surface 1a. The end portion is provided with the above-described abnormal brightness preventing leg portion 42, so that light leakage and abnormal luminance of the linear light sources 8 on the crossing one light guide surface 1a and the other crossing light guide surface 1b are present in the portion. The possibility of occurrence has been resolved.

  In the figure, reference numeral 81 denotes a lead wire of the linear light source 8.

  The illuminating device A configured as described above can simultaneously illuminate the entire surface of one of the intersecting light guide surfaces 1a and the other of the intersecting light guide surfaces 1b by energization. Surface illumination including the outer peripheral side surface and the outer peripheral end surface of the covering case 5 is performed, and uniformity of illumination luminance is ensured over the entire area, and the crossing one light guide surface 1a and the other crossing light guide surface 1b. In addition, it is possible to perform frameless overall illumination with a good appearance without exposing a frame, a fixture, or the like that partitions them between them.

  Further, since the heat generated by the linear light source 8 can be effectively radiated by the heat radiating plate 6, the temperature of the crossing light guide surface 1a and the other light guiding surface 1b does not rise due to heat generation, and is the same as the ambient temperature. Or substantially the same temperature can be maintained.

  Therefore, for example, the crossing light guide surface 1a is a bottom surface, the crossing other light guiding surface 1b is erected, the crossing one light guiding surface 1a is a bottom surface and a back surface, and the crossing other light guiding surface 1b is a protruding surface. In a suitable form, if it is used to display the product by placing it on the division section of the display shelf, the showcase, etc., and performing the lighting exhibition, it effectively performs illumination of various products on multiple surfaces, It is possible to increase the willingness to purchase merchandise and secure customer attraction, and furthermore, since there is almost no temperature rise due to the above heat generation, it can be used as display for cakes, fresh foods, etc. .

  Although the illustrated example is as described above, the embedding arrangement of the U-shaped cross-section receiving ridge is both the end portion and the intermediate position of one light guide surface and the one light guide surface intersecting A linear light source that supplies incident light is set to one of the end portion or the intermediate position, and a linear light source that supplies incident light to the light guide surface of the intersecting one is arranged directly on the outer surface of the receiving strip. The crossing of the light guide surface of the other crossing with respect to the light guide surface of the crossing is performed at right angles, whereby the arrangement of the light guiding surface of the other crossing with respect to the light guiding surface of the crossing is performed at the arrangement position. Cross section T-shaped or L-shaped, and thus the entire surface illumination device crosses one light guide surface such as L-shaped, F-shaped, E-shaped, etc. A plurality of or a plurality of light-transmitting synthetic resins are arranged on the bottom surface of the box on one light guide surface. It shall be made of synthetic resin other than metal, metal, etc., and the light guide surface shall be surrounded by placing a top plate, a bottom plate, a back plate, etc. on the surface other than the front surface of the surface lighting device having the above cross-sectional shape. At this time, these are formed of a non-illuminating material, and a U-shaped receiving strip is arranged in the same manner as above in the part where these are installed, and these arrangements are performed in the same manner as described above. In addition, the box and the surface cover, the surface cover and the covering case, the box bottom surface and the heat sink, the U-shaped receiving section and the rising end of the heat sink, etc. The surface lighting device with the light guide plate crossing arrangement is used as furniture by fixing it with fixing means such as screwing in a part that does not affect the appearance, and using the surface lighting device as a partition and forming a display shelf , Store supplies, office use In implementing the present invention, including use as an interior material of a building, etc., a surface illumination device, a crossing one light guide surface, a crossing other light guide surface, a U-shaped cross section, necessary Specific shapes, structures, materials, applications, numbers, dimensions, relations, additions to these, etc., such as boxes, surface covers, covering cases, heat sinks, standing ends, linear light sources, etc. used according to Various forms can be employed without departing from the gist of the invention.

A surface illumination device 1a Crossing one light guide surface 1b Crossing another light guiding surface 2 Light guiding plate 21 Incident end surface 22 Inserting end 3 Receiving 4 Box 41 Surface cover 42 Leg 5 Covering case 6 Heat sink 61 Standing end 7 Reflective surface 8 Linear light source 81 Lead wire

Claims (8)

  A surface illumination device configured to perform surface illumination with one light guide surface intersecting with the other light guide surface intersected with the light guide surface, embedded in an end portion or an intermediate position of the one light guide surface A cross-shaped U-shaped receiving strip that cross-holds the other light guide surface, and one light guide surface and the other light guide surface that intersect the outer wall and the bottom wall on one or both sides of the receiver A surface illumination device having a light guide surface intersecting arrangement, characterized in that it comprises linear light sources directed in a plurality of intersecting directions for supplying incident light.   A linear light source that supplies the incident light to one of the intersecting light guide surfaces and having the embedded arrangement of the U-shaped receiving strips as both ends and intermediate positions of the intersecting one light guide surface 2. The surface illumination device according to claim 1, wherein the surface illumination device is arranged as one of a portion and an intermediate position.   The crossing of the other light guide surface is orthogonally held with respect to the one light guide surface of the cross, so that the arrangement of the light guide surface of the other cross with respect to the light guide surface of the cross is T-shaped or L-shaped. The surface illumination device having a light guide surface crossing arrangement according to claim 1 or 2, characterized in that:   The crossed one light guide surface is covered with a light guide plate, a box containing the light guide plate including its outer peripheral edge, and a surface of the light guide plate excluding the receiving portion of the U-shaped cross section. A light diffusing surface cover that closes the opening surface, and the light guide surface of the other cross is the same except for the light guide plate and the insertion end that exposes the end of the light guide plate on the cross holding side. The light guide plate is formed with a light diffusing coating case that covers the front and back surfaces and the three end surfaces of the light guide plate in a box shape, and the insertion end portion of the light guide plate in the other light guide surface intersects the cross section U of the one light guide surface A part or all of the four end surfaces of the covering case that is inserted into the letter-shaped receiving strip and defines the outer periphery of the insertion end portion are arranged in contact with the surface cover of the one light guide surface. The surface illumination device of the light guide surface crossing arrangement according to claim 1, 2 or 3.   The light guide according to claim 4, wherein a surface cover of the crossing one light guide surface and a covering case of the other crossing light guide surface are formed of a light-transmitting synthetic resin material exhibiting a milky white color tone. A surface illumination device arranged in a plane crossing manner.   An L-shaped or thick-walled leg for preventing abnormal luminance is disposed so as to be inserted into the box so as to reach between the linear light source arrangement position of the light guide surface of the reference surface and the end position of the light guide plate in the surface cover. The surface illumination device according to claim 4 or 5, wherein the light guide surfaces are arranged in an intersecting manner.   A heat sink is disposed between the light guide plate of the crossing one light guide surface and the bottom wall of the box, and a standing end is disposed on the receiving side of the U-shaped cross section of the heat sink. The linear illumination device according to claim 4, 5 or 6, characterized in that a linear light source is installed through the standing end.   The surface illumination device according to claim 1, 2, 3, 4, 5, 6 or 7, wherein the linear light source is an LED light source using an LED bar.

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