JP2015109141A - Module for double-sided light emitting device and double-sided light emitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a module which can be used for acquiring double-sided light emitting devices in which dimensions of light guide plates are different from each other, with good productivity.SOLUTION: A module for a double-sided light emitting device can be detachably mounted on end edge part 21 of a light guide plate 2, and has a light source part 342 which allows light to enter at an end surface 2A of the end edge part 21. It has: a base surface part 31; a first support surface part 32 and a second support surface part 33; a light source part 34 in which the plurality of pieces of light sources 342 are provided in parallel on a surface 3411 of a substrate 341; and a fixing mechanism 35 for fixing the light guide plate 2 to the first support surface part 32 and the second support surface part 33. The fixing mechanism 35 is provided so as to detachably fix the end edge part 21 of the light guide plate 2 located between the first support surface part 32 and the second support surface part 33 to the first support surface part 32 and the second support surface part 33, and the surface 3411 of the substrate 341 and the surface of the light source 342 of the light source part 34 are coated by transparent fluororesin.

Description

  The present invention relates to a module that can constitute a double-sided light emitting device simply by being attached to a light guide plate, and a double-sided light emitting device using the module.

  A conventional double-sided light emitting device includes at least a plurality of light sources, a light guide plate for surface emitting light incident from the light source, and a housing body that surrounds and supports the light source and the light guide plate.

JP 2010-177077 A JP-A-6-186433 JP 2006-185724 A

  A conventional general double-sided light emitting device is configured by integrating a light source, a light guide plate, and a housing body. In the apparatus having such a configuration, the light guide plate used in one apparatus has one predetermined size. Therefore, in order to obtain a double-sided light emitting device using a light guide plate having a size different from the predetermined size, it is necessary to newly manufacture the entire device. Therefore, when trying to obtain a double-sided light emitting device in which the dimensions of the light guide plates are different, the productivity is low and the cost is high.

  The present invention provides a module that can be used to obtain a double-sided light-emitting device having different light guide plate dimensions with high productivity, that is, at low cost, and a double-sided light-emitting device using the module. , To provide.

  The module for a double-sided light emitting device according to the first invention of the present application is configured to be detachably attached to one end edge of a light guide plate having a rectangular shape in plan view, and has a light source that makes light incident on the end face of the end edge. A double-sided light emitting device module comprising: a base surface portion; a first support surface portion; a second support surface portion; a light source portion in which a plurality of the light sources are arranged in parallel on a surface of the substrate; And a fixing mechanism that fixes the first support surface portion and the second support surface portion, and the first support surface portion and the second support surface portion sandwich the edge portion of the light guide plate from both sides. The base surface portion is provided so as to face the edge portion of the light guide plate when the edge portion of the light guide plate is fixed between the first support surface portion and the second support surface portion. The light source unit is provided so as to face the end surface of the unit. The light guide plate is configured such that when the edge portion of the light guide plate is fixed between the first support surface portion and the second support surface portion, light from the light source can enter the end surface of the edge portion. The fixing mechanism is attached to a base surface portion, and the fixing mechanism is configured to connect the end edge portion of the light guide plate positioned between the first support surface portion and the second support surface portion to the first support surface portion and the second support surface portion. It is provided so as to be detachably fixed to the surface part, and the surface of the substrate and the surface of the light source of the light source part are coated with a transparent fluororesin.

  The double-sided light emitting device of the second invention of the present application includes the double-sided light emitting device module of the first invention and the light guide plate, and the edge portion of the light guide plate has the first support surface portion and the light guide plate. It is located between the second support surface part and is detachably fixed to the first support surface part and the second support surface part by the fixing mechanism, and the light from the light source of the light source part transmits the edge. It can enter into the said end surface of a part, It is characterized by the above-mentioned.

  According to the first aspect of the present invention, since the double-sided light emitting device can be configured simply by attaching and fixing the module to one edge of the light guide plate, the productivity of the double-sided light emitting device can be improved. In addition, by preparing a plurality of types of modules having different lengths in advance, a double-sided light emitting device can be manufactured easily using light guide plates of various sizes.

  According to the second aspect of the present invention, since the light guide plate and the module are used, the configuration is simple, and hence the handleability is excellent. Moreover, since various sizes can be realized, it can be used in various places.

1 is a perspective view of a double-sided light emitting device according to an embodiment of the present invention. It is a disassembled perspective view of the apparatus of FIG. FIG. 3 is a view taken in the direction of arrow III in FIG. 1. FIG. 2 is a side view of the apparatus of FIG. 1. FIG. 5 is an enlarged partial view of FIG. It is a partial cross-section enlarged view of the A section of FIG. It is a perspective view of the module of the present invention. It is a front view of the module of FIG. It is a side view of the module of FIG. It is a plane schematic diagram which shows the usage example of a module. It is a figure equivalent to FIG. 6 which shows an example of the modification of a fixing mechanism. It is a figure equivalent to FIG. 6 which shows another example of the modification of a fixing mechanism.

  FIG. 1 is a perspective view of a double-sided light emitting device according to an embodiment of the present invention. The double-sided light emitting device 1 includes a light guide plate 2 and a double-sided light emitting device module 3 according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the device 1. 3 is a view taken in the direction of arrow III in FIG. FIG. 4 is a side view of the device 1. FIG. 5 is an enlarged partial view of FIG. 6 is a partially enlarged cross-sectional view of a portion A in FIG.

(overall structure)
The double-sided light emitting device 1 is configured by attaching a module 3 to one end edge 21 of a light guide plate 2. In this example, the length L1 of the module 3 is the same as the length S1 of the edge portion 21.

(Light guide plate 2)
The light guide plate 2 is a rectangular plate in plan view, and includes four end surfaces 2A, 2B, 2C, and 2D, and two surfaces 2X and 2W that are orthogonal to these end surfaces. The light guide plate 2 is made of resin as a main component. As the resin, for example, at least one selected from the group consisting of (meth) acrylic resin, polystyrene resin, polyolefin resin, polycarbonate resin, polyvinyl chloride resin, and (meth) acrylic acid ester-styrene resin is preferable, Particularly preferred is a (meth) acrylic resin. These resins may be used as a mixture of two or more, or may be used so as to laminate two or more. In the present specification, the term “(meth) acryl” means “methacryl” or “acryl”. The thickness of the light guide plate 2 is usually 1 to 15 mm, preferably 1.5 to 8 mm, and more preferably 2 to 6 mm. If the light guide plate 2 is too thin, the light from the light source may be difficult to enter the end face of the light guide plate 2, and if it is too thick, the light emission efficiency may be insufficient. Since the weight of the entire light emitting device is increased, it is not preferable that the light emitting device is too thin or too thick.

(Module 3)
FIG. 7 is a perspective view of the module 3. FIG. 8 is a front view of the module 3. FIG. 9 is a side view of the module 3. The module 3 includes a base surface portion 31, a first support surface portion 32 and a second support surface portion 33, a light source portion 34, and a fixing mechanism 35.

  As shown in FIG. 6 in particular, the first support surface portion 32 and the second support surface portion 33 are provided to face each other so that one end edge portion 21 of the light guide plate 2 can be sandwiched from the upper and lower surfaces. ing. Specifically, as shown in FIG. 9, the first support surface portion 32 extends in the lateral direction from the upper edge of the base surface portion 31 in the standing state, and the second support surface portion 33 is the base surface portion 31. It extends in the same lateral direction as the first support surface portion 32 from the lower edge, and both are parallel and face each other. As for the distance between the first support surface portion 32 and the second support surface portion 33, the distance T1 on the distal end side is slightly smaller than the distance T2 on the proximal end side. The interval T1 is set to be the same as or slightly larger than the thickness of the light guide plate 2.

  As described above, the base surface portion 31 is provided in a standing state. Specifically, the first support surface portion 32 and the second support surface portion 33 extend in a direction perpendicular to the base surface portion 31. As shown in FIG. 6, the base surface portion 31 is formed on the end surface 2 </ b> A of the edge portion 21 when the edge portion 21 of the light guide plate 2 is fixed between the first support surface portion 32 and the second support surface portion 33. It is provided so as to face each other.

  The light source unit 34 includes a substrate 341, a plurality of light sources 342, and several spacers 343. Specifically, an LED is used as the light source 342. The light sources 342 are arranged and fixed on the surface 3411 of the substrate 341 at equal intervals in the longitudinal direction. The spacers 343 are disposed near the center in the longitudinal direction and near both ends in the longitudinal direction of the surface 3411 of the substrate 341. The spacer 343 protrudes from the surface 3411 of the substrate 341 rather than the light source 342, and the end surface 2 </ b> A is formed when the end edge portion 21 of the light guide plate 2 is fixed between the first support surface portion 32 and the second support surface portion 33. The end surface 2A is prevented from directly contacting the light source 342. The light source unit 34 is fixed to the base surface unit 31 by bonding the back surface 3412 of the substrate 341 to the surface 311 of the base surface unit 31 with an adhesive or the like. As shown in FIG. 6, the light source unit 34 includes a light guide plate 2 having a center line C passing through the center C <b> 1 of the light source 341 and fixed between the first support surface unit 32 and the second support surface unit 33. It is fixed to the base surface portion 31 so as to pass through the center C2 in the thickness direction of the end surface 2A.

  Moreover, in the light source part 34, the surface 3411 of the board | substrate 341 and the surface of the light source 342 are coated with transparent fluororesin as waterproofing processing. This transparent fluororesin is colorless. Specifically, the thickness of the coating is about several tens of μm to 1 mm. Specifically, as the transparent fluororesin, trade name “Fluorosurf” and product number “FG-3030C-30” of Fluoro Technology Co., Ltd. can be preferably used. Due to such waterproofing processing, the module 3 and the double-sided light emitting device 1 can be suitably used outdoors.

  The fixing mechanism 35 detachably fixes the edge 21 of the light guide plate 2 positioned between the first support surface portion 32 and the second support surface portion 33 to the first support surface portion 32 and the second support surface portion 33. ,Function. Specifically, as shown in FIG. 6, the first support surface portion 32, the end edge portion 21 of the light guide plate 2, and the second support surface portion 33 are configured with screws 351. In this case, a through-hole 321 is formed in the first support surface portion 32 to allow the screw 351 to pass therethrough, and a through-hole 211 is formed in the end edge portion 21 of the light guide plate 2, so that the second support A through hole 331 is formed in the surface portion 33. As shown in FIG. 5, the screws 351 are provided at two locations near both ends of the module 3 in the longitudinal direction. According to the fixing mechanism 35, the end edge portion 21 of the light guide plate 2 can be fixed to the first support surface portion 32 and the second support surface portion 33 by tightening the screws 351 through the through holes 321, 211, and 331. The end edge portion 21 of the light guide plate 2 can be removed from the first support surface portion 32 and the second support surface portion 33 by loosening the screws 351 and extracting them from the through holes 321, 211, 331. That is, the light guide plate 2 is detachable from the module 3 by the fixing mechanism 35.

  Further, as shown in FIG. 9, an extended portion 320 of the first support surface portion 32 and an extended portion 330 of the second support surface portion 33 are formed on the back surface side of the base surface portion 31. As shown in FIG. 3, a power line 361 for supplying power to the light source 342 is accommodated between the extension part 320 and the extension part 330. The power supply line 361 passes through the base surface portion 31 in the vicinity of the center in the longitudinal direction of the module 3 and is connected to the light source 342, and the penetration portion is covered with the power supply cover 362.

  In addition, many ribs 37 extended in the longitudinal direction formed in the surface of the 1st support surface part 31 and its extension part 320, and the surface of the 2nd support surface part 33 and the extension part 330 are modules. 3 can be improved, and the heat dissipation effect can be improved.

(assembly)
First, the light guide plate 2 and the module 3 are prepared. Next, the edge portion 21 of the light guide plate 2 is inserted between the first support surface portion 32 and the second support surface portion 33 of the module 3 and brought into contact with the spacer 343. Then, the screws 351 are passed through the through holes 321, 211, 331 and tightened. Thereby, the double-sided light emitting device 1 is configured.

(Operation)
When a power source (not shown) is turned on, power is supplied to the light source 342 through the power line 361, and the light source 342 is turned on. When the light source 342 is turned on, the light from the light source 342 enters the end surface 2A. Light entering the end face 2A travels while reflecting through the light guide plate 2, and exits from both sides 2X and 2W. Thereby, light emission is performed from both sides 2X and 2W, that is, double-sided light emission is performed.

  The surface of the light source 342 is coated with a transparent fluororesin for waterproofing, but this transparent fluororesin does not reduce the amount of light emitted from the light source 342. Therefore, a sufficient amount of light is incident on the end surface 2A from the light source 342, and accordingly, a sufficient amount of light is emitted from both surfaces 2X and 2W. Moreover, this transparent fluororesin can suppress the light emitted from the light source 342 from becoming blue light. Therefore, it can suppress that the light which injects into the end surface 2A from the light source 342 turns into blue light, Therefore, it can suppress that the light emission from both surfaces 2X and 2W turns into blue light.

(effect)
(1) When the module 3 having the above-described configuration is used, the double-sided light emitting device 1 can be configured simply by attaching and fixing the module 3 to the edge portion 21 of the light guide plate 2. Therefore, the double-sided light emitting device 1 can be configured very easily, and thus the productivity of the double-sided light emitting device 1 can be improved.
(2) In the module 3 having the above-described configuration, the waterproof processing of the light source unit 34 is realized by coating with a fluorine resin, and this coating can be performed by brushing. Therefore, waterproofing of the module 3 can be performed very easily, and therefore the productivity of the module 3 can be improved, and consequently the productivity of the double-sided light emitting device 1 can be improved.
(3) Since the module 3 having the above-described configuration includes the base surface portion 31, the first support surface portion 32 and the second support surface portion 33, the light source portion 34, and the fixing mechanism 35, the module 3 is realized with a simple configuration. it can.

(4) For example, when a plurality of types of modules having different length dimensions are manufactured in advance, the double-sided light emitting device 1 can be manufactured easily using light guide plates 2 of various sizes. For example, as shown in FIG. 10, when a module 3A having a length L2 (that is, half of L1) of the module 3 having the above-described configuration is manufactured, a dimension L1 is obtained as shown in FIG. The double-sided light emitting device 1 can be manufactured using the light guide plate 2 having a size having one side, and as shown in FIG. 10B, the double-sided light emission is performed using the light guide plate 2 having a size having one side of the dimension L2. The device 1 can be manufactured. Further, as shown in FIG. 10C, the double-sided light emitting device 1 can be manufactured using the light guide plate 2 having a size having one side of the dimension “L1 + L2”. As shown in (D), the double-sided light emitting device 1 can be manufactured using the light guide plate 2 having a size having one side of the dimension “L1 + L1”. That is, in the case of FIG. 10, the double-sided light emitting device 1 can be manufactured easily using the light guide plate 2 having a side having a multiple of the dimension L2. Therefore, according to the module 3 having the above-described configuration, the double-sided light emitting device 1 in which the dimensions of the light guide plate 2 are different can be obtained with high productivity, that is, at low cost.

  In addition, if the types of the length dimension of the module 3 prepared in advance are set to three or more types, it is possible to obtain the double-sided light emitting device 1 having various sizes with high productivity.

(5) Since the double-sided light emitting device 1 having the above-described configuration is configured by the light guide plate 2 and the module 3, the configuration is simple, and therefore, the handleability is excellent.
(6) Since the double-sided light emitting device 1 having the above configuration can be realized in various sizes, it can be used in various places.

(Modification)
(1) As the fixing mechanism 35, a mechanism shown in FIG. In FIG. 11, the end edge portion 21 of the light guide plate 2 is pressed against the second support surface portion 33 by tightening the screw member 352 penetrating the first support surface portion 32. Thereby, the edge 21 of the light guide plate 2 can be fixed to the module 3. On the other hand, if the screw member 352 is loosened, the light guide plate 2 can be removed from the module 3. Therefore, the edge portion 21 of the light guide plate 2 can be detachably fixed to the first support surface portion 32 and the second support surface portion 33 also by the fixing mechanism of FIG.

(2) As the fixing mechanism 35, a mechanism shown in FIG. In FIG. 12, the first support surface portion 32 and the edge portion 21 are joined by filling the through hole 322 of the first support surface portion 32 and the through hole 332 of the second support surface portion 33 with an adhesive 353. In addition, the second support surface portion 33 and the end edge portion 21 are joined. Thereby, the edge 21 of the light guide plate 2 can be fixed to the module 3. On the other hand, the light guide plate 2 can be removed from the module 3 by dissolving the filled adhesive 353 with a solvent. Therefore, the edge 21 of the light guide plate 2 can be detachably fixed to the first support surface 32 and the second support surface 33 also by the fixing mechanism of FIG.

(3) The module 3 may be attached not to the short side edge of the light guide plate 2 but to the long side edge.

  Since the module of the present invention can constitute a double-sided light emitting device simply by being attached and fixed to one edge of the light guide plate, it has great industrial utility value.

DESCRIPTION OF SYMBOLS 1 Double-sided light-emitting device 2 Light-guide plate 2A End surface 21 Edge edge part 3 Module 31 Base surface part 32 1st support surface part 33 2nd support surface part 34 Light source part 341 Board | substrate 3411 Surface 342 Light source 35 Fixing mechanism 351 Screw 352 Screw member 353 Adhesive

Claims (5)

A module for a double-sided light emitting device, which is detachably attached to one end edge of a rectangular light guide plate in plan view, and has a light source that makes light incident on the end face of the end edge,
A base surface portion, a first support surface portion and a second support surface portion, a light source portion in which a plurality of the light sources are arranged on the surface of the substrate, and the light guide plate are fixed to the first support surface portion and the second support surface portion. And a fixing mechanism that
The first support surface portion and the second support surface portion are provided to face each other so that the edge portion of the light guide plate can be sandwiched from both sides,
The base surface portion is provided to face the end surface of the edge portion when the edge portion of the light guide plate is fixed between the first support surface portion and the second support surface portion. And
The light source unit may allow light from the light source to enter the end surface of the edge portion when the edge portion of the light guide plate is fixed between the first support surface portion and the second support surface portion. Is attached to the base surface portion,
The fixing mechanism detachably fixes the edge portion of the light guide plate positioned between the first support surface portion and the second support surface portion to the first support surface portion and the second support surface portion. Is provided,
The surface of the substrate and the surface of the light source of the light source unit are coated with a transparent fluororesin,
A module for a double-sided light emitting device. The fixing mechanism is configured with a screw that penetrates the first support surface portion, the end edge portion of the light guide plate, and the second support surface portion,
The module for a double-sided light emitting device according to claim 1. The fixing mechanism is composed of an adhesive that joins the first support surface portion and the second support surface portion to the edge portion of the light guide plate.
The module for a double-sided light emitting device according to claim 1. The fixing mechanism is configured by a screw member that presses the first support surface portion or the second support surface portion against the edge portion of the light guide plate.
The module for a double-sided light emitting device according to claim 1. The double-sided light emitting device module according to any one of claims 1 to 4, and the light guide plate,
The edge portion of the light guide plate is positioned between the first support surface portion and the second support surface portion, and is detachably fixed to the first support surface portion and the second support surface portion by the fixing mechanism. And
The light from the light source of the light source unit can be incident on the end surface of the edge portion.
The double-sided light-emitting device characterized by the above-mentioned.

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