JPWO2014195988A1 - Designable light emitting device and light diffusing member - Google Patents

Abstract

The designable light emitting device 1 includes a light diffusion design portion 2 that is formed into a shape representing a character, a figure, or a pattern and diffuses light, a light source 9 that irradiates light from the back side to the light diffusion design portion 2, and a light diffusion The design portion 2 and a housing 4 that supports the light source 9 are provided. The light diffusion design portion 2 includes a light displacement portion 20b that is processed to displace the light direction on at least the surface 12 side of the edge portion 20a. The body 4 includes a support portion 51 that supports the light diffusion design portion 2 in contact with or close to the back surface 23 side of the light displacement portion 20b, and the light displacement portion 20b is a front surface 12 of the light diffusion design portion 2 from the front. When the light is visually recognized, the light is displaced in a direction in which the shadow of the support portion 51 due to the light from the light source 9 is not seen or difficult to see. This eliminates the cover housing that holds the edge of the diffusion plate 11 from the front, improves the design, and the support portion 51 that attaches the diffusion plate 11 to the housing 4 diffuses as a shadow of light from the light source 9. It is possible to prevent or suppress reflection on the plate 11.

Description

  The present invention relates to a design light-emitting device and a light diffusing member that are used, for example, for a store name, a logo lighting sign, a lighting advertisement, and the like.

  2. Description of the Related Art Conventionally, a design light emitting device called a lighting sign or a lighting advertisement for brightly displaying a store name or a logo has been provided. Such a design light emitting device diffuses light from a light source on a front panel to emit diffused light, and brightly displays a design such as a store name or a logo. This design light emitting device has high visibility and is beautiful, and is therefore used in various places such as displaying a brand name at the front or entrance of a brand store.

  Such a design light emitting device has been changed from a conventional neon sign to an LED sign using a recent LED, and various design properties are required.

  In such a design light emitting device, as shown in FIG. 4 of Patent Document 1, a diffuser plate or the like (display unit 21) formed in a character shape or the like is placed on the front surface of the casing, and the edge of the diffuser plate In general, a cover casing (front frame portion 23) that holds the frame from the front side with a certain width is covered. This shape is characterized in that an opaque portion due to metal or the like (front frame portion 23) is always generated at the edge portion of the diffusion plate.

  Here, if this edge portion is eliminated and the entire surface of the character or the like is made a diffusion plate, a beautiful design light emitting device without an edge is obtained. For this purpose, it is necessary to fix the diffusion plate to the housing. As a fixing method, as in the joint portion 11 shown in FIG. 3 of Patent Document 1, a protrusion is provided on the inner side of the housing, and the rear surface side of the diffusion plate is fixed to the protrusion with an adhesive or the like. Conceivable.

JP 2007-72053 A

  However, in such a method, when the internal light source is caused to emit light, there is a problem in that the projecting portion of the housing appears as a shadow, and the design is impaired. FIG. 6 is an explanatory diagram for explaining the shadow generated in this way with a photograph. For example, as shown in the rear view of FIG. 6A and the partially enlarged perspective view of FIG. 6B, a transparent projection 102a is attached to the diffusion plate 102, and the diffusion plate 102 is attached to the casing by the projection 102a. Secure to. In this case, when the internal light source is caused to emit light, as shown in the front view of FIG. 6C and the partially enlarged front view of FIG. Reflect. In particular, when a screw is screwed into the hole of the protrusion 102 a and fixed to the housing, the shadow of the screw is clearly reflected on the diffusion plate 102. As described above, there is a problem that the design is impaired when a shadow is seen.

  In view of the above-described problems, the present invention eliminates the cover housing that holds the edge of the diffusion plate from the front to improve the design, and the mounting portion for attaching the diffusion plate to the housing is a shadow of light from the light source. It is an object of the present invention to provide a design light-emitting device that can prevent or suppress reflection on a diffusion plate, improve beauty, and improve user satisfaction.

  The present invention includes a light diffusion design portion that is formed in a shape representing a character, a figure, or a pattern to diffuse light, a light source that irradiates light from the back side to the light diffusion design portion, the light diffusion design portion, and the A housing that supports a light source, and the light diffusion design portion includes a light displacement portion that is processed to displace the direction of light on at least a surface side of the edge portion, and the housing includes the light displacement portion. A support portion that supports the light diffusion design portion in contact with or close to the back surface side, and the light displacement portion of the support portion by the light from the light source when the surface of the light diffusion design portion is viewed from the front It is a design light emitting device having a structure in which light is displaced in a direction in which a shadow is not seen or is difficult to see.

  According to the present invention, the design of the cover is improved by eliminating the cover housing that holds the edge of the diffuser plate from the front, and the mounting portion for attaching the diffuser plate to the housing is reflected on the diffuser plate as a shadow of light from the light source. It is possible to provide a designable light emitting device that can prevent or suppress the above, improve the beauty, and improve the satisfaction of the user.

Explanatory drawing of the front and inside of a designable light-emitting device. Explanatory drawing by the longitudinal cross-section of a designable light-emitting device. Explanatory drawing explaining the refraction of the light of a designable light-emitting device. Explanatory drawing explaining a mode that the shadow of an instruction | indication part is not reflected on a diffusion plate with a photograph. Explanatory drawing by the partially expanded sectional view of another Example. Explanatory drawing of the shadow reflected on a diffusion plate by the fixing method considered conventionally.

  The inventors of the present invention have made extensive studies to eliminate the cover that sandwiches the edge portion of the light diffusion design portion that diffuses light from the front side to the back side of the casing, and to provide a design light emitting device that has excellent design properties. It was. First, the present inventors simply eliminated surface pressing, provided a plurality of support protrusions protruding inward at the front surface side end of the casing, and fixed the back surface of the light diffusion design portion to the support protrusions. However, the light from the light source in the casing caused a shadow of the support protrusion, and the light diffusion design portion was partially unsharp.

  Therefore, the present inventors have made various studies and made extensive studies, and as a result, by processing at least the front side of the edge portion of the light diffusion design portion, the effect of the support portion that supports the light diffusion design portion is determined. Has completed a beautiful design light emitting device that is not visible to the viewer.

  The design light emitting device of the present invention can be applied to various characters, figures, and patterns. In the first embodiment, a roman character “D” that is a kind of serif font will be described as an example.

FIG. 1A shows a front view of the designable light emitting device 1, and FIG. 1B shows a front view showing the inside of the designable light emitting device 1.
As shown in FIGS. 1A and 1B, the designable light emitting device 1 is mainly configured by a light diffusion design portion 2 and a housing 4 as a light blocking member.

  The light diffusion design portion 2 is formed in a plate shape cut out in the shape of a character, figure, or pattern drawn by a stroke. In the first embodiment, the light diffusion design portion 2 is formed in a “D” shape. Note that a stroke (English: stroke) refers to a line having a width constituting a character, a figure, or a pattern, such as a line constituting a single stroke, a figure or a pattern constituting a character.

  As shown in FIG. 1B, the housing 4 has a back surface portion 6 having the same shape as the light diffusion design portion 2 (see FIG. 1A), and faces from the side edge of the back surface portion 6 to the front. A side surface portion 5 having a constant depth is provided. Therefore, the housing 4 has an opening 4 a having the same shape as the light diffusion design portion 2 on the front surface, and is formed in a container shape that is covered by the side surface portion 5 and the back surface portion 6 except for the front surface.

  On the inner side of the front side end portion of the side surface portion 5 of the housing 4, a support portion 51 (edge portion) having a constant width is provided along the side surface portion 5 serving as an edge of the stroke. The support portion 51 supports the light diffusion design portion 2 so as not to be detached from the front surface of the housing 4.

  On the front side of the back surface portion 6 of the housing 4, a reflection surface 6 a is provided on the entire surface. The reflecting surface 6a is formed by a glossy white paint (including white printing). This white paint functions as a reflecting surface that reflects light.

  A plurality of light sources 9 are provided on the front side of the reflecting surface 6a. The illustrated light source 9 is an LED, but is not limited thereto, and an appropriate light source such as a neon tube, a flexible substrate having a light emitting unit, or a light guide plate for guiding light from the light emitting unit can be used.

  The light source 9 is connected by a wiring (not shown) and emits light upon receiving power from a power supply (not shown). The reflective surface 6a, the light source 9, and the wiring are not shown in FIG.

  In this way, the light diffusing design portion 2 is arranged on the front surface of the housing 4, and the designable light emitting device 1 representing characters, figures, and patterns is completed as shown in the front view of FIG.

  2A is a cross-sectional view showing an AA cut end surface in FIG. 1A, and FIG. 2B is an enlarged view in the vicinity of the edge 20a in this cross-sectional view.

  As shown in FIG. 2A, cushion materials 7 are sandwiched between both side ends of the back surface portion 6 and the bottom portions of the side surface portions 5, respectively. Then, a screw 8a is screwed from the outside near the bottom of the side surface portion 5 toward the back surface portion 6, and the side surface portion 5 and the back surface portion 6 are fixed by this screwing. A screw 8 a for fixing to the wall surface or the like of the facility is screwed into the back surface portion 6.

  With this configuration, the design light-emitting device 1 is fixed to the store wall surface or the like by the screws 8a. Further, the cushion material 7 prevents light from leaking from between the side surface portion 5 and the back surface portion 6 and intrusion of dust and water.

  A reflection surface 5 a is provided on the inner surface of the side surface portion 5 of the housing 4. The reflecting surface 5a is formed by a glossy white paint. The space surrounded by the reflecting surface 5a and the reflecting surface 6a functions as the light reflecting space 10. In addition, the reflective surface 5a and the reflective surface 6a can be made into an appropriate color without being limited to white. Further, the reflecting surface 5a and the reflecting surface 6a are not limited to painting, and can be appropriately configured such as printing or a reflecting film.

  Light emitted from the light source 9 is reflected in various directions in the light reflection space 10 by the reflecting surface 5a at the side surface position and the reflecting surface 6a at the back surface position. Thereby, the direct light from the light source 9 and the reflected light from the reflecting surface 5a and the reflecting surface 6a are incident on the light diffusion design portion 2. That is, surface light from various directions is incident on the light diffusion design portion 2.

  The light diffusion design portion 2 diffuses and transmits incident light. Therefore, when the light source 9 emits light, the light diffusing design part 2 is visually shining white. The light transmitted through the light diffusion design portion 2 becomes surface light.

  As shown in FIG. 2 (B), the light diffusion design portion 2 is a multilayer in which a front surface side diffusion plate 11 (a diffusion member) and a rear surface side transmission plate 13 (a transmission member) are stacked and fixed by an adhesive or the like. Formed in the structure. The diffusion plate 11 is formed of a milky white and translucent acrylic plate. The thickness of the diffusing plate 11 is configured such that light can be diffused more than the viewer cannot recognize at least the shape of the light source 9 when viewed from the front. The transmission plate 13 is made of a transparent acrylic plate. The diffusion plate 11 and the transmission plate 13 are not limited to acrylic plates, and can be formed of a plate-like member made of an appropriate material that diffuses transmitted light, such as a glass plate or a plastic plate.

  On the side end side of the light diffusion design portion 2, when the surface of the light diffusion design portion 2 is viewed from the front side on the side end side of the diffusion plate 11, it appears that the shadow of the support portion 51 due to the light from the light source 9 is not seen. There is provided an edge portion 20a including a light displacement portion 20b that displaces light in a direction that makes it difficult, and a mounting portion 20c that is mounted on the support portion 51 of the housing 4 on the side end side of the transmission plate 13. .

  The optical displacement portion 20 b includes a first displacement portion 21 that draws a circular arc from the vicinity of the end portion of the surface 12 of the diffusion plate 11 to the side surface, and a second displacement portion 22 that forms a linear side surface continuous from the first displacement portion 21. have. By the first displacement portion 21 and the second displacement portion 22, the light displacement portion 20 b is formed from the surface 12 to the side surface at the edge portion of the diffusion plate 11.

  The first displacement portion 21 has a surface-side boundary line 21a, which is a boundary line with the surface 12, having a thickness D of the diffusion plate 11 in a range from the side to the inside centering on the position P of the inner end of the support portion 51. It is configured to be located within the first range L1 that is within 3/4 of this and within the second range L2 that is within 1/2 of the thickness D, which is a more preferable range.

  Further, the first displacement portion 21 has a side surface side boundary line 21b, which is a boundary line with the second displacement portion 22 located on the side surface, from the front surface to the back surface with the position C being the center of the thickness D of the diffusion plate 11. The range up to is within the third range L3 within 3/4 of the thickness D and within the fourth range L4 within 1/2 of the thickness D, which is a more preferable range. ing.

  The second displacement portion 22 is an inclined surface having an angle θ with the extension line of the side surface portion 5 of the housing 4 within 30 °, within a more preferable range of 15 °, and more preferably within 10 °. It is configured. The angle θ of the second displacement portion 22 can be 0 °, but is preferably 1 ° or more, and more preferably 5 ° or more.

  In this embodiment, the thickness D of the diffusion plate 11 is 8 mm, the angle θ of the second displacement portion 22 is 8 °, and the radius of curvature of the first displacement portion 21 is 5 mm. However, the present invention is not limited to this.

  The mounting portion 20c of the transmission plate 13 includes a concave portion 14 (back portion) on the adhesion surface side with the diffusion plate 11, and includes a convex portion 15 (guide portion) on the back surface side. Thereby, the support part 51 can be inserted | pinched between the convex part 15 and the back surface 23 of the edge part of the diffusion plate 11, and the light-diffusion design part 2 can be attached so that it may not remove | deviate from the housing | casing 4. FIG.

  The convex portion 15 is configured such that the end portion is positioned on the inner side by the thickness of the side surface portion 5 than the side end of the diffusion plate 11. Further, the concave portion 14 is configured such that the distance from the end portion of the convex portion 15 is longer than the protruding distance of the support portion 51. Thereby, the space | gap E is comprised between the inner side end of the support part 51, and the recessed part 14. As shown in FIG. When the design light emitting device 1 is heated in direct sunlight or the like when the gap E is installed in the outdoors, the light diffusion design portion 2 is heated against the metal housing 4 such as stainless steel that does not expand by heat. Even if it expands, the change due to the expansion can be absorbed. Therefore, the gap E can prevent the light diffusion design portion 2 and the housing 4 from being damaged due to a difference in deformation due to heat.

  FIG. 4 is an explanatory diagram for explaining that no shadow is reflected on the light diffusion design portion 2 of the designable light emitting device 1 configured as described above. As shown in the partially enlarged perspective view of FIG. 4A and the partially enlarged front view of FIG. 4B, when the light source 9 emits light, the first displacement portion 21 and the second displacement portion 22 of the diffusion plate 2 are emitted. Emits light in the same manner as the plane portion forming most of the diffusion plate 2, and the shadow of the support portion 51 is not reflected. 4A and 4B, the front side of the diffusing plate 2 is cut so that the positional relationship between the support portion 51, the first displacement portion 21, and the second displacement portion 22 can be easily understood. I am doing so. In addition, the light source 9 is arranged in an up-down and left-right alignment in a lattice pattern at equal intervals in the example of this photograph.

  With the above configuration, it is possible to provide the designable light emitting device 1 having no surface pressing of metal or the like on the surface side of the edge of the light diffusion design portion 2.

  Since the design light-emitting device 1 emits the light source 9 by the light displacement portion 20b to emit light substantially uniformly to the end of the light diffusion design portion 2, the beautiful light-emitting character, light-emitting figure, or A luminous pattern can be obtained. More specifically, the light from the light source 9 is diffused in the diffusion plate 11 and refracted from the first displacement portion 21 and the second displacement portion 22 as indicated by an arrow Y2 in the partially enlarged sectional view of FIG. Is emitted. As shown in the drawing, the arrow Y2 refracts the light from the light source 9 toward the front center side as compared to the arrow Y1 indicating the light emitted from the planar surface 12. By this refraction, the light from the light source 9 can be delivered to the corners of the light diffusion design part 2 and visually recognized without making the viewer visually recognize the shadow of the support part 51.

  Since the light diffusion design portion 2 is formed in the same size as the housing 4 when viewed from the front, the design light emitting device 1 that becomes the entire light diffusion design portion 2 where the front of the housing 4 is not visually recognized. Can be provided.

  Further, the structure in which the support portion 51 is sandwiched between the back surface 23 of the diffusion plate 11 and the convex portion 15 of the transmission plate 13 can prevent direct light from the light source 9 from leaking out.

  Due to the gap E between the inner end of the support portion 51 and the recess 14, the expansion ratio of the light diffusion design portion 2 and the expansion of the housing 4 due to heat can be set even in an environment where the temperature changes greatly due to direct sunlight or the like. The difference in rate can be absorbed to prevent breakage.

  The gap E may be provided with a cushion material that easily deforms. Thereby, in the designable light-emitting device 1 installed outdoors, it can prevent that moisture and dust, such as rainwater, penetrate | invade into an inside.

FIG. 5 is an explanatory diagram for explaining another embodiment.
FIG. 5A is a partially enlarged cross-sectional view of the second embodiment. In the second embodiment, the first displacement portion 21A of the diffusion plate 11A is formed in a linear shape. Since the other configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals and detailed description thereof is omitted.
Even in this case, the same effect as in the first embodiment can be obtained.

  FIG. 5B is a partially enlarged cross-sectional view of the third embodiment. In Example 3, one diffusion plate 11B having the same shape as the shape in which the diffusion plate 11A and the transmission plate 13 in Example 2 are overlapped is provided. That is, in the diffusion plate 11B, the side surface of one diffusion plate is processed to form the first displacement portion 21A, the second displacement portion 22, the back surface 23, the concave portion 14B, and the convex portion 15B.

  Even in this case, the same effect as in the first embodiment can be obtained. Moreover, since it is integrally formed, the process of bonding the diffusion plate 11 and the transmission plate 13 as in the first and second embodiments can be reduced.

FIG. 5C is a partially enlarged cross-sectional view of the fourth embodiment. In the fourth embodiment, the transmission plate 13 of the second embodiment is configured by stacking and bonding the first transmission plate 131 and the second transmission plate 132 together.
Again. The same effect as in the first embodiment can be obtained. In the second embodiment, it is necessary to process the end of the transmission plate 13 to form a step between the concave portion 14 and the convex portion 15. In the fourth embodiment, the two transmission plates 131 and 132 are pasted. By combining them, a step between the concave portion 14C and the convex portion 15C can be formed.

  FIG. 5D is a partially enlarged cross-sectional view of the fifth embodiment. In the fifth embodiment, the back surface 23 of the diffusion plate 11 </ b> A of the second embodiment is directly bonded to the support portion 51 provided on the side surface portion 5 of the housing 4.

  Thereby, like Example 1, the design light-emitting device 1 without surface pressings, such as a metal, can be provided in the surface side of the edge of the light-diffusion design part 2, and when the light source 9 is light-emitted, a light-diffusion design part The light can be emitted substantially uniformly up to the end of 2.

  Further, there is no gap E corresponding to expansion / contraction due to heat as in the first embodiment, but in a place where expansion / contraction of a material such as acrylic is difficult to occur such as when installed indoors or when the size is relatively small. We can use enough. Moreover, this can eliminate the transmission plate 13 and reduce the cost.

FIG. 5E is a partially enlarged cross-sectional view of the sixth embodiment. In the sixth embodiment, the diffusion plate 11E is slightly larger than the housing 4 so that the end of the diffusion plate 11E of the first embodiment protrudes outward slightly by the width (width W) from the outer surface of the side surface portion 5 of the housing 4. Is formed. Since the other configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals and detailed description thereof is omitted.
Even in this case, the same effect as in the first embodiment can be obtained. In addition, even if the light diffusion design portion 2E is slightly moved by the gap E, the design light-emitting device 1E having excellent design properties in which the housing 4 is not visually recognized from the front and the whole is the light diffusion design portion 2E can be provided. Contrary to the sixth embodiment, the diffusion plate 11E is formed to be smaller than the casing 4, and the support part 51 of the casing 4 can be seen only by the width W outside the light diffusion design part 2E when viewed from the front. May be. In this case, it is possible to provide an aesthetic appearance with a metal edge or the like at a slightly lower position (a position on the back side) outside the light diffusion design portion 2E.

  In addition, although the housing | casing 4 was made into the same shape as the light-diffusion design part 2, it is not restricted to this, The front is made into arbitrary shapes, such as rectangular plate shape, and is the same as the shape of the light-diffusion design part 2 on this front. It is good also as a shape which provided a little small hole. In this case, the edge of the hole may be configured to support the light diffusion design portion 2 as the support portion 51. Also in this case, the light diffusion design part 2 arranged so as to overlap the front side of the front side of the housing 4 emits light evenly to the edge, and the aesthetic appearance that the shadow of the support part 51 is not reflected on the light diffusion design part 2 is provided. can do.

  The present invention can be used for a store name, a lighting sign for a logo, a lighting advertisement, and the like, and can be used for an appropriate design lighting product in which a design drawn by a stroke is visually recognized.

DESCRIPTION OF SYMBOLS 1 ... Design light-emitting device 2 ... Light-diffusion design part 4 ... Case 9 ... Light source 20a ... Edge part 20b ... Light displacement part 21 ... 1st displacement part 22 ... 2nd displacement part 11, 11A, 11B, 11E ... Diffusing plate 12 ... front surface 14, 14B, 14C ... concave portion 15, 15B, 15C ... convex portion 23 ... back surface 51 ... support portion E ... gap

The present invention includes a light diffusion design portion that is formed in a shape representing a character, a figure, or a pattern to diffuse light, a light source that irradiates light from the back side to the light diffusion design portion, the light diffusion design portion, and the A housing that supports a light source, and the light diffusion design portion includes a light displacement portion that is processed to displace the direction of light on at least a surface side of the edge portion, and the housing includes the light displacement portion. A support portion is provided that supports the light diffusion design portion in contact with or close to the back surface side, and the light displacement portion includes a first displacement portion on the front surface side and a second displacement portion on the side surface side having different inclination angles or bending radii. The second displacement portion is a design light emitting device formed on an inclined surface having an angle of 1 ° to 30 ° with an extension line of the side surface of the housing .

Claims (5)

A light diffusion design part that is formed into a shape representing a character, figure, or pattern and diffuses light;
A light source for irradiating light from the back side to the light diffusion design portion;
The light diffusion design portion and a housing that supports the light source,
The light diffusion design portion is provided with a light displacement portion that is processed to displace the direction of light on at least the surface side of the edge portion,
The housing includes a support portion that supports the light diffusion design portion in contact with or close to the back side of the light displacement portion,
The design light emitting device is configured such that when the surface of the light diffusion design portion is viewed from the front, the light displacement portion displaces light in a direction in which the shadow of the support portion due to light from the light source is not seen or difficult to see. . The design light emitting device according to claim 1, wherein the light displacement portion is formed by two or more surface processings having different inclination angles or bending radii. The edge portion includes the light displacement portion on the front side, a back portion recessed inward from the side end of the displacement portion on the back surface side of the light displacement portion, and a side edge of the back portion on the back surface side of the back portion. A guide portion protruding outward,
The design light emitting device according to claim 1, wherein the support portion is configured to be sandwiched between the light displacement portion and the guide portion. The protrusion amount of the support part is an amount that does not contact the back part and is sandwiched between the light displacement part and the guide part, and supports expansion / contraction between the support part and the back part. The designable light-emitting device according to claim 3, further comprising a void for use. A light diffusing member having a light diffusing design portion that diffuses light formed in a shape representing a character, figure, or pattern,
The light diffusion design portion is provided with a light displacement portion that is processed to displace the direction of light on at least the surface side of the edge portion,
The light diffusing member is a light diffusing member configured to displace light in a direction in which a shadow of the support part due to light from the light source is not seen or difficult to see when the surface of the light diffusing design part is viewed from the front.

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