JP5775556B2 - Illuminated signboard - Google Patents

Description

  The present invention relates to an electric signboard.

  There is known an electric signboard (also called a Colton signboard) in which a light source is arranged in a box and a film such as an advertisement is arranged on a display so that it can be advertised at night. For example, Patent Document 1 discloses a transparent or translucent base material, a transparent or translucent pressure-sensitive adhesive layer laminated on the back surface of the base material, a display unit using printing ink formed on the surface of the base material, An electric signboard is described in which a printed sheet body made of is attached to a transparent or translucent plastic plate via the pressure-sensitive adhesive layer and irradiated with a light beam from a light source to display the display portion with electric decoration.

  In recent years, it has been studied to adopt the same configuration as the backlight of a liquid crystal television as a light source of such an electric signboard (for example, Patent Document 2). In that case, in order to make the electric signboard as thin as possible, only the light source and the light guide plate (LGP) in the backlight module of the liquid crystal television are used, and the optical sheet is often omitted.

JP 2013-114241 A (released on June 10, 2013) JP 2007-80707 A (published March 29, 2007)

  The inventors of the present invention have intensively studied an electric signboard including a light source, a light guide plate, and a diffusion plate.

  Here, there is usually a very thin air layer between the light guide plate and the diffusion plate. However, when the light guide plate and the diffusion plate are brought into close contact due to distortion of the diffusion plate or the like, this air layer disappears, so that the amount of reflection at the diffusion plate changes and the brightness of the contact portion increases. As a result, when viewed from the front side of the signboard, spot-like luminance unevenness occurs.

  This invention is made | formed in view of the said subject, and makes it a main objective to provide the technique for suppressing a brightness nonuniformity in the electrical signboard provided with the light source, the light-guide plate, and the diffuser plate.

  In order to solve the above-described problem, an electrical signboard according to one embodiment of the present invention includes a light source, a light guide plate, and a diffusion plate. (1) A surface of the light guide plate facing the diffusion plate, Alternatively, a concavo-convex structure is provided on a surface of the diffusion plate facing the light guide plate, or (2) a light transmission plate is further provided between the light guide plate and the diffusion plate, and at least one surface of the light transmission plate Further, the concavo-convex structure is provided.

  According to one embodiment of the present invention, the uneven structure provided on the light guide plate, the diffuser plate, or the light transmissive plate allows an air layer to stably exist between the light guide plate and the diffuser plate. Can be suppressed.

It is side sectional drawing which shows typically the principal part structure of the electrical signboard which concerns on one Embodiment of this invention. It is side sectional drawing which shows typically the principal part structure of the electrical signboard which concerns on a prior art. In the electrical signboard which concerns on a prior art, it is a sectional side view which shows typically the state which the distortion produced in the diffuser plate. It is a perspective view which shows typically the external appearance of the electrical signboard which concerns on one Embodiment of this invention. It is a front view which shows typically the external appearance of the electrical signboard which concerns on one Embodiment of this invention. It is a rear view which shows typically the external appearance of the electrical signboard which concerns on one Embodiment of this invention. It is an exploded view which shows typically the internal structure of the electrical signboard which concerns on one Embodiment of this invention. It is an exploded view showing typically the composition of the back light chassis part of the electric signboard concerning one embodiment of the present invention. It is side sectional drawing which shows typically the principal part structure of the electrical signboard which concerns on one Embodiment of this invention. It is side sectional drawing which shows typically the principal part structure of the electrical signboard which concerns on one Embodiment of this invention. In the electrical signboard which concerns on one Embodiment of this invention, it is a perspective view which shows typically the state which opened the acrylic board and the lid frame. It is an expansion perspective view which shows typically the film fixture of the electrical signboard which concerns on one Embodiment of this invention. It is an expansion perspective view which shows typically the film fixture of the electrical signboard which concerns on one Embodiment of this invention. It is a figure explaining the locking mechanism of the film fixing metal fitting which concerns on two embodiment of this invention. It is an enlarged view which shows typically the film corner fixing metal fitting of the electrical decoration signboard which concerns on one Embodiment of this invention. It is a perspective view which shows typically the state which rotated the backlight chassis part of the electrical signboard which concerns on one Embodiment of this invention. It is a perspective view which shows typically the hinge for rotating the backlight chassis part of the electrical signboard which concerns on one Embodiment of this invention. It is a perspective view which shows typically the dharma type hole for fixing the backlight chassis part of the electrical signboard which concerns on one Embodiment of this invention. It is an enlarged view which shows typically the milky white translucent board of the electrical decoration signboard which concerns on one Embodiment of this invention, and its fixing fixture. It is side sectional drawing which shows typically the milky-white translucent board of the electrical signboard which concerns on one Embodiment of this invention, and its fixing fixture.

(Schematic configuration of the electric signboard)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, a vertical 60-inch size electric signboard having a rectangular shape as a whole will be described, but the present invention is not limited to this, and various sizes and shapes can be used. Further, for convenience of explanation, in each embodiment, members having the same functions as those described in other embodiments are denoted by the same reference numerals, and the description thereof is omitted.

(First embodiment)
FIG. 4 is a perspective view schematically showing the external appearance of the electric signboard 10 according to the first embodiment. FIG. 5 is a front view schematically showing the exterior of the electric signboard 10. FIG. 6 is a rear view schematically showing the exterior of the electric signboard 10. FIG. 7 is an exploded view schematically showing the internal configuration of the electrical signboard 10. FIG. 8 is an exploded view schematically showing the configuration of the backlight chassis portion 30 of the electric signboard 10.

  The electric signboard 10 includes a base part (fixing part) 11, a power supply part 12, a backlight chassis part fixing bracket (holding part) 13, a backlight chassis part 30, a lens sheet (translucent plate) 14, a milky white translucent plate ( Diffusion plate) 15, milky white translucent plate fixing bracket 16, film fixing bracket (film fixing portion) 17, film corner fixing bracket (hanging portion) 18, acrylic plate (transparent lid) 19, and lid frame 20, and milky white The film 1 is held between the translucent plate 15 and the acrylic plate 19. 5 does not show the acrylic plate 19 and the lid frame 20, and FIG. 7 does not show the lid frame 20.

  The backlight chassis unit 30 includes a backlight chassis 31, a reflection sheet 32, an LED substrate (light source, LED light source) 33, a middle chassis 34, and a light guide plate 35.

  The base part 11 is a base part for attaching the electric signboard 10 to the wall surface. The backlight chassis portion fixing bracket 13 is a bracket for holding the backlight chassis portion 30 and attaching the backlight chassis portion 30 to the base portion 11, and has a shape corresponding to the backlight chassis portion 30. The backlight chassis portion fixing bracket 13 is screwed to the outer peripheral portion of the backlight chassis portion 30 mainly on the bottom surface (the surface on the base portion 11 side) (see FIG. 6) and is hinged to the base portion 11. And is rotatable with respect to the base portion 11 (described later).

  The backlight chassis unit 30 is configured such that light emitted from the LED substrate 33 enters the light guide plate 35, and light emitted from the light guide plate 35 irradiates the entire milky white translucent plate 15. That is, in the backlight chassis unit 30, the light guide plate 35 is disposed on the most milky white translucent plate 15 side. For example, the backlight portion of a liquid crystal television can be used as the backlight chassis unit 30. Specifically, a BL chassis, a middle chassis, a light guide plate, a reflective sheet, an LED substrate, a heat sink, etc. in a liquid crystal television can be used as they are. However, there is no need to divert the optical sheet and the liquid crystal panel. In addition, by using the LED substrate 33 as a light source, a long life can be realized, luminance unevenness can be reduced, and luminance can be increased.

  The power supply unit (power supply board) 12 is a circuit unique to the electric signboard, and is a circuit that is supplied with commercial power via a simple switch and supplies power to the LED board 33. The power supply unit 12 is disposed on the base unit 11 side of the backlight chassis 31. In other words, the power supply unit 12 is fixed to the backlight chassis unit 30 and is held by the backlight chassis unit fixing bracket 13.

  A light control circuit (light control board) (not shown) is also provided. The dimming circuit is a circuit that detects ambient brightness, and is arranged at a position where light can be detected (for example, the backlight chassis unit 30).

  The milky white translucent plate 15 is a diffusion plate unique to the electric signboard. However, a translucent or transparent diffusion plate of milky white or other colors may be used according to the type of advertisement. The diffusion plate in general can be formed, for example, by dispersing light scattering fine particles in a polymer. The milky white translucent plate fixing bracket 16 is a bracket for fixing the milky white translucent plate 15 to the backlight chassis 31, and is provided so as to hook four sides of the milky white translucent plate 15.

  In addition, the lens sheet 14 having a concavo-convex structure on both sides is disposed between the light guide plate 35 and the milky white translucent plate 15.

  The film 1 is a film on which an advertisement or the like is drawn, and the illuminated signboard 10 displays the advertisement or the like when the film 1 is irradiated with light. The film fixing bracket 17 is a bracket for fixing the film 1 on the milky white translucent plate 15, and is provided on the upper side of the backlight chassis portion fixing bracket 13. The film corner fixing bracket 18 is a bracket that hooks the four corners of the film 1 to prevent the film 1 from being turned over.

  The acrylic plate 19 is a transparent protective plate and is attached to the lid frame 20.

(Effect of lens sheet)
Here, the effect of providing the lens sheet 14 will be described. First, the prior art without the lens sheet 14 will be described with reference to FIGS. FIG. 2 is a side cross-sectional view schematically showing the configuration of the main part of the electric signboard 90 according to the prior art. FIG. 3 is a side cross-sectional view schematically showing a state in which the milky white translucent plate 93 is distorted in the electric signboard 90.

  The electric signboard 90 includes a reflective sheet 91, a light guide plate 92, and a milky white translucent plate 93, and a film is held on the milky white translucent plate 93. Light emitted from a light source (not shown) and incident from the side surface of the light guide plate 92 is emitted in the display surface direction of the light guide plate 92 (the direction from the light guide plate 92 toward the film 1, the upper direction on the paper surface). The light is further diffused by the milky white translucent plate 93, reaches the film 1 and illuminates an advertisement or the like drawn on the film 1. In addition, a thin air layer exists between the light guide plate 92 and the milky white translucent plate 93, and the light emitted from the light guide plate 92 is once diffused in the air layer, and then the milky white translucent plate 93. Incident (see FIG. 2).

  However, when the milky white translucent plate 93 is distorted due to an external pressure or the like and comes into close contact with the light guide plate 92, the light emitted from the light guide plate 92 is not diffused in the air layer and is applied to the milky white translucent plate 93. Since the light is incident, the region where the light guide plate 92 and the milky white translucent plate 93 are in close contact with each other has higher luminance than the other regions, resulting in luminance unevenness (see FIG. 3).

  On the other hand, in the electrical signboard 10 according to the present embodiment, by arranging the lens sheet 14 between the light guide plate 35 and the milky white translucent plate 15, it is possible to suppress luminance unevenness as follows. FIG. 1 is a side cross-sectional view schematically showing a main part configuration of the electric signboard 10. The lens sheet 14 has a concavo-convex structure formed on both surfaces thereof to prevent adhesion between the surfaces facing the respective surfaces. Therefore, even if the milky white translucent plate 15 is distorted, the milky white translucent plate 15 and the lens sheet 14 or the lens sheet 14 and the light guide plate 35 are not in close contact with each other. An air layer can be maintained between them (see FIG. 1). Thereby, the light emitted from the light guide plate 35 always passes through the air layer, and stable light diffusion is possible. Thereby, luminance unevenness can be suppressed.

  As long as an air layer can be maintained between the light guide plate 35 and the milky white translucent plate 15, the translucent plate inserted between the light guide plate 35 and the milky white translucent plate 15 is not limited to the lens sheet 14, but at least Any translucent plate having a concavo-convex structure on one side may be used. Furthermore, the concavo-convex structure is more preferably a concavo-convex structure for preventing adhesion between the surface opposite to the surface provided with the concavo-convex structure. Such a translucent plate may be, for example, a transparent or translucent sheet that is at least one-side matte, satin or textured.

  In addition, this invention is not limited to the structure which arrange | positions the translucent board which has uneven | corrugated structure like the lens sheet 14 between the light-guide plate 35 and the milky-white translucent board 15. FIG.

(Second Embodiment)
FIG. 9 is a side cross-sectional view schematically showing a main configuration of an electric signboard 10 ′ according to the second embodiment of the present invention. The electrical signboard 10 ′ has a configuration in which a concavo-convex structure for preventing close contact with the milky white translucent plate 15 is provided on a surface of the light guide plate 35 ′ facing the milky white translucent plate 15. According to this configuration, even if the milky white translucent plate 15 is distorted, the milky white translucent plate 15 and the light guide plate 35 ′ do not adhere to each other, and an air layer is formed between the milky white translucent plate 15 and the light guide plate 35 ′. Can be maintained (see FIG. 9). Thereby, the light emitted from the light guide plate 35 always passes through the air layer, and stable light diffusion is possible. Thereby, even if there is no lens sheet 14, a brightness nonuniformity can be suppressed.

(Third embodiment)
FIG. 10 is a side cross-sectional view schematically showing a main part configuration of an electric signboard 10 ″ according to the third embodiment of the present invention. The electric signboard 10 ″ has a configuration in which a concavo-convex structure for preventing adhesion between the milky white translucent plate 15 ′ and the light guide plate 35 is provided on a surface facing the light guide plate 35. According to this configuration, even if the milky-white translucent plate 15 ′ is distorted, the milky-white translucent plate 15 ′ and the light guide plate 35 are not in close contact with each other, and air is placed between the milky-white translucent plate 15 ′ and the light guide plate 35. The layer can be maintained (see FIG. 10). Thereby, the light emitted from the light guide plate 35 always passes through the air layer, and stable light diffusion is possible. Thereby, even if there is no lens sheet 14, a brightness nonuniformity can be suppressed.

  The configurations other than the lens sheet 14 and the concavo-convex structure in the electric signboards 10 ′ and 10 ″ are the same as those of the electric signboard 10.

(Film fixing part)
Generally, in an electric signboard, a film on which an advertisement or the like is drawn is frequently replaced. Therefore, in the present embodiment, the acrylic plate 19 and the lid frame 20 are easily opened so that the film 1 suspended on the milky white translucent plate 15 can be easily replaced.

  FIG. 11 is a perspective view schematically showing a state in which the acrylic board 19 and the lid frame 20 are opened in the electric signboard 10. The acrylic plate 19 and the lid frame 20 are hinged to the base portion 11 and are opened by rotating counterclockwise. The direction of rotation is not particularly limited. The end of the film 1 is fixed by a film fixing bracket (film holder) 17 provided on the upper part of the backlight chassis fixing bracket 13 and is held so as to be suspended. Thereby, the film 1 can be hold | maintained successfully in the position where light is irradiated.

  FIG. 12 is an enlarged perspective view schematically showing the film fixing bracket 17 of the electric signboard 10. FIGS. 14C and 14D are views for explaining a locking mechanism of the film fixing bracket 17. The film fixing bracket 17 is a lock mechanism that fixes the film 1 when slid in one direction. That is, the screw x is inserted into the groove y of the film fixing bracket 17, and the groove y has a bent shape. When the film fixing bracket 17 is slid leftward on the paper surface, a gap is generated between the milky white translucent plate 15 and the film fixing bracket 17 (see FIGS. 12 and 14 (c)). 1 is inserted, and the end of the film 1 can be fixed by sliding the film fixing bracket 17 rightward toward the paper surface (see (d) of FIG. 14).

  However, since the film fixing bracket 17 is shifted in one direction when the film 1 is fixed, the film 1 may follow the movement of the film fixing bracket 17 and the position of the film 1 may shift. Further, since the film 1 is very thin, it is likely to be loosened. Therefore, it may take time to fix the film 1.

(Fourth embodiment)
Therefore, in the fourth embodiment, a film fixing bracket 17 ′ including a first fixing portion 17′a that fixes a part of the film 1 and a second fixing portion 17′b that fixes the other part of the film 1 is used. The first fixing portion 17′a and the second fixing portion 17′b fix the film 1 when they are slid in directions away from each other.

  FIG. 13 is an enlarged perspective view schematically showing the film fixing bracket 17 ′. FIGS. 14A and 14B are diagrams for explaining a locking mechanism of the film fixing bracket 17 ′. The first fixing portion 17'a and the second fixing portion 17'b are each provided with a groove y, and a screw x is inserted in each groove y. Each of the grooves y has a bent shape. When the first fixing portion 17′a is slid rightward toward the paper surface and the second fixing portion 17′b is slid leftward toward the paper surface, a gap is formed between the milky white translucent plate 15 and the film fixing bracket 17. (See FIGS. 13 (a) and 14 (a)), the film 1 is inserted into the gap, and the first fixing portion 17′a is slid leftward with respect to the paper surface, so that the second fixing portion The end of the film 1 can be fixed by sliding 17′b in the right direction toward the paper surface (see FIG. 13B and FIG. 14B).

  Thus, since film 1 is fixed when 1st fixing | fixed part 17'a and 2nd fixing | fixed part 17'b are slid in the direction which mutually separates, film 1 is 1st fixing. The shift of the film 1 can be suppressed without following the movement of either the portion 17′a or the second fixing portion 17′b. Further, since the film 1 is pulled in opposite directions by the first fixing portion 17 ′ a and the second fixing portion 17 ′ b, the film 1 is more difficult to wrinkle.

  Further, with this structure, luminance unevenness due to the close contact between the milky white translucent plate 15 and the light guide plate 35 can be reduced. That is, when the film 1 is fixed at one point, a force is applied to the portion, and the milky white translucent plate 15 and the light guide plate 35 may be brought into close contact with each other, resulting in uneven brightness. However, when the film 1 is pressed and fixed on a flat surface as in this structure, the film 1 is pressed on a wider surface. Further, since the milky white translucent plate 15 and the light guide plate 35 that are close to the film 1 are pressed on a wide surface, the milky white translucent plate 15 is prevented from being distorted and closely attached to the light guide plate 35, thereby preventing uneven brightness. Can be suppressed.

(Film corner fixing bracket)
In a general electric signboard, the film is very thin. In addition, the lighting of the electric signboard is often set to high luminance so that advertisements and the like can be visually recognized by distant people, and the interior of the electric signboard may become hot. And if a thin film as described above is exposed to a high temperature state for a long time, it may be deformed by heat. In that case, the edge part of a film, especially four corners may float from a milky white translucent board.

(Fifth embodiment)
Therefore, in the fifth embodiment, film corner fixing for hooking the four corners of the film 1 on the four corners of the milky white translucent plate 15 in order to prevent the four corners of the film 1 from floating from the milky white translucent plate 15. A metal fitting 18 is provided. FIG. 15 is an enlarged view schematically showing the film corner fixture 18 of the electric signboard 10. The film corner fixing bracket 18 covers the corner of the milky white translucent plate 15 and is provided so that the film 1 can be inserted between the milky white translucent plate 15 and the film corner fixing bracket 18. Is inserted between the milky white translucent plate 15 and the film corner fixing bracket 18, the corner of the film 1 can be hooked on the film corner fixing bracket 18. Thereby, the corner of the film 1 can be prevented from floating from the milky white translucent plate 15.

  As shown in FIG. 5, the film corner fixing metal 18 is provided at positions corresponding to the four corners of the milky white translucent plate 15.

(Open structure)
The electric signboard is generally installed fixed to a wall surface. Therefore, when a failure occurs in an electrical part such as a light source, it is necessary to remove the entire sign from the wall surface, and to check and repair the failure of the electrical part, which makes maintenance work complicated.

(Sixth embodiment)
Therefore, in the sixth embodiment, the backlight chassis part fixing bracket 13 is hinged to the base part 11 and the backlight chassis part 30 is simply rotated while the base part 11 is fixed to the wall surface. The power supply unit 12 on the back surface (base unit 11 side) of the backlight chassis unit 30 can be exposed. Thereby, the maintenance work of the power supply part 12 can be performed easily.

  FIG. 16 is a perspective view schematically showing a state in which the backlight chassis portion 30 of the electric signboard 10 is rotated, and (a) and (b) are diagrams in which the observation directions are changed. First, the acrylic plate 19 and the lid frame 20 are rotated counterclockwise, and then the backlight chassis unit 30 is rotated clockwise, whereby the power supply unit 12 disposed on the back surface of the backlight chassis unit 30. Can be exposed. The rotation direction of the backlight chassis 30 is not particularly limited and can be arbitrarily set. However, for ease of operation, the backlight chassis unit 30 is rotated in a direction opposite to the rotation direction of the acrylic plate 19 and the lid frame 20. It is preferable to be able to move. Further, the rotation range of the backlight chassis portion 30 is not particularly limited, but it is preferable that the backlight chassis portion 30 is rotated at least 90 degrees from the viewpoint of ease of maintenance.

  FIG. 17 is a perspective view schematically showing a hinge 21 for rotating the backlight chassis unit 30 of the electrical signboard 10, and FIG. 17A rotates the backlight chassis unit 30 of the electrical signboard 10. (B) shows the enlarged view around the hinge 21, respectively. The backlight chassis portion fixing bracket 13 is hinged to the base portion 11 by a hinge 21, so that the backlight chassis portion 30 can be rotated.

  FIG. 18 is a perspective view schematically showing a Dharma hole 22 for fixing the backlight chassis portion 30 of the electric signboard 10, and FIG. 18A is a diagram illustrating the backlight chassis portion 30 of the electric signboard 10. (B) shows the enlarged view around the Dharma hole 22, respectively. A Dalma-type hole 22 is provided on the side of the backlight chassis portion fixing bracket 13 opposite to the hinge 21, and the backlight chassis portion fixing bracket 13 is screwed to the base portion 11 through the Dalma-type hole 22. The backlight chassis 30 can be fixed so as not to rotate. When rotating the backlight chassis 30, the screw that passes through the Dalma hole 22 may be removed, but the bottom hole of the Dalma hole 22 is larger than the head of the screw. The backlight chassis part 30 can be rotated only by slightly lifting 30.

  A dimming circuit (not shown) may be disposed on the back surface of the backlight chassis unit 30. In that case, the dimming circuit is exposed by rotating the backlight chassis unit 30, and dimming is performed. Circuit maintenance can also be easily performed.

(Step of milky white translucent plate)
In the electric signboard, the film is arranged so as to cover the milky white translucent plate. Here, since a film is very thin, it is preferable that the part which mounts a film is flat. This is because when a film is placed on a non-flat portion, a step is generated on the film, which causes wrinkles and distortion. However, particularly when a backlight module of a liquid crystal television is used as a light source, it is difficult to flatten a portion on which a film is placed. This is because a structure for holding the milky white translucent plate is required. When the milky white translucent plate is pressed from the display side (the side opposite to the backlight module) with a metal fitting, the metal fitting protrudes beyond the milky white translucent plate. This is because the flatness of the portion on which the film is placed is lost.

(Seventh embodiment)
Therefore, in the seventh embodiment, the outer peripheral portion 15a of the surface facing the light guide plate 35 in the milky white translucent plate 15 is recessed with respect to the inner peripheral portion 15b of the surface, and the milky white translucent plate fixing bracket 16 is provided. Is configured to press the outer peripheral portion. Thereby, the milky white translucent plate fixing metal fitting 16 can avoid protruding, and can ensure the flatness of the part which mounts a film.

  FIG. 19 is an enlarged view schematically showing the milky white translucent plate 15 and the milky white translucent plate fixture 16 of the electric signboard 10. FIG. 20 is a side cross-sectional view schematically showing the milky white translucent plate 15 and the milky white translucent plate fixture 16 of the electric signboard 10. A step 15c is provided between the outer peripheral portion 15a and the inner peripheral portion 15b of the milky white translucent plate 15 so that the outer peripheral portion 15a is recessed with respect to the inner peripheral portion 15b. It can suppress that the metal fitting 16 protrudes. The depth of the step 15c is more preferably the same as or deeper than the milky white translucent plate fixing bracket 16, but if the step 15c is provided even slightly, the milky white translucent plate fixing bracket 16 protrudes toward the film 1 side. Since the amount can be reduced, the effect of the invention can be obtained.

  As described above, the outer peripheral portion 15a of the milky white translucent plate 15 is recessed with respect to the inner peripheral portion 15b, so that even when the outer peripheral portion 15a is pressed by the milky white translucent plate fixing bracket 16 or the like, the milky white translucent plate is translucent. It can suppress that the flatness on the board 15 is impaired. Thereby, the film 1 can be suitably disposed on the milky white translucent plate 15.

  Further, with this structure, luminance unevenness due to the close contact between the milky white translucent plate 15 and the light guide plate 35 can be reduced. That is, when the milky white translucent plate fixing bracket 16 protrudes in the direction of the acrylic plate 19, the force from the acrylic plate 19 is applied to the milky white translucent plate fixing bracket 16 with priority. If it does so, force will be applied to that part and milky white translucent board 15 and light guide plate 35 may stick closely according to it, and it may become uneven brightness. However, if the surface on which the film 1 is placed is flat with respect to the acrylic plate 19 as in this structure, the milky white translucent plate 15 and the light guide plate 35 are in contact with the acrylic plate 19 on a wider surface. Will also hold in a wide area. Therefore, the milky white translucent plate 15 can be prevented from being distorted and brought into close contact with the light guide plate 35, and the occurrence of luminance unevenness can be suppressed.

[Summary]
The electric signboard (10, 10 ′, 10 ″) according to aspect 1 of the present invention includes a light source (LED substrate 33), a light guide plate (35, 35 ′), and a diffusion plate (milky white translucent plates 15, 15). And (1) a concavo-convex structure is provided on the surface of the light guide plate facing the diffusion plate, or the surface of the diffusion plate facing the light guide plate, or (2) the A light transmission plate (lens sheet 14) is further provided between the light guide plate and the diffusion plate, and the uneven structure is provided on at least one surface of the light transmission plate.

  According to the above configuration, the uneven structure provided on the light guide plate, the diffusion plate, or the translucent plate allows the air layer to exist stably between the light guide plate and the diffusion plate, thereby suppressing luminance unevenness. can do.

  The electrical signboard according to aspect 2 of the present invention is the structure for preventing adhesion between the surface on which the uneven structure is provided and the surface opposite to the surface in the aspect 1, in the above-described aspect 1. Preferably there is.

  According to the above configuration, the light guide plate and the diffusion plate, or the light guide plate and the light transmission plate, or the light transmission plate and the diffusion plate are not in close contact with each other due to the uneven structure. The layer can exist more stably.

  The electric signboard according to aspect 3 of the present invention is the film fixing part (17) that suspends and fixes the film (1) so as to cover the surface of the diffusion plate facing away from the light guide plate in the aspect 1 or 2. , 17 ′).

  According to said structure, a film can be hold | maintained successfully in the position where light is irradiated.

  In the electrical decoration signboard according to aspect 4 of the present invention, in the aspect 3, the film fixing part fixes a first fixing part (17′a) that fixes a part of the film and another part of the film. A second fixing portion (17′b) may be provided, and the first fixing portion and the second fixing portion may fix the film when slid in directions away from each other.

  According to said structure, when fixing a film to a film fixing | fixed part, it can suppress that a film follows the motion of a film fixing | fixed part and the position of a film shifts | deviates. Moreover, it can suppress that a film wrinkles by pulling a film to a mutually opposing direction.

  The electric signboard according to the fifth aspect of the present invention may further include a hooking portion (film corner fixing bracket 18) for hooking the four corners of the film on the diffusion plate in the third or fourth aspect.

  According to said structure, the turning in the four corners of a film can be prevented.

  The electric signboard according to aspect 6 of the present invention is the power supply part (12) for supplying power to the light source, and the holding part (back) for holding the power supply part, the light source, and the light guide plate. A light chassis portion fixing bracket 13) and a fixing portion (base portion 11) for fixing the electric signboard to the wall surface. The holding portion is hinged to the fixing portion, and the holding portion is rotated. The power supply unit may be exposed by being moved.

  According to said structure, since a power supply part can be exposed, fixing a fixing | fixed part to a wall surface, a power supply part can be maintained easily.

  In the electrical decoration signboard according to aspect 7 of the present invention, in the above aspects 1 to 6, the outer peripheral portion (15a) of the surface facing the light guide plate in the diffuser plate has an inner peripheral portion (15b) of the surface. It may be recessed.

  According to said structure, even if the outer peripheral part is pressed with metal fittings etc. by denting the outer peripheral part of a diffusion plate with respect to an inner peripheral part, it suppresses that the flatness on a diffusion plate is impaired. be able to. Thereby, a film can be suitably arranged on the diffusion plate.

  The electric signboard according to aspect 8 of the present invention may further include a transparent lid (acrylic plate 19) for pairing with the diffusion plate and sandwiching the film in the above aspects 1 to 7.

  According to said structure, a film can be protected successfully.

  In the electrical decoration signboard according to aspect 9 of the present invention, in the above aspects 1 to 8, the light source may be an LED light source.

  According to the above configuration, a long life can be realized, luminance unevenness can be reduced, and luminance can be increased.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.

  The present invention can be used in the field of manufacturing electric signboards.

1 Film 10 Illuminated signboard 11 Base part (fixed part)
12 Power supply 13 Backlight chassis fixing bracket (holding part)
14 Lens sheet (translucent plate)
15 Milky white translucent plate (diffusion plate)
16 Milky white translucent plate fixture 17 Film fixture (film fixture)
18 Film corner fixing bracket (hanging part)
19 Acrylic board (transparent lid)
20 Lid frame 21 Hinge 22 Dharma type hole 30 Backlight chassis part 31 Backlight chassis 32 Reflective sheet 33 LED substrate (light source, LED light source)
34 Middle chassis 35 Light guide plate

Claims (12)

A light source, a light guide plate, a diffusion plate, and a film fixing unit for hanging and fixing the film so as to cover the surface of the diffusion plate facing away from the light guide plate ,
A concavo-convex structure is provided on the surface of the light guide plate facing the diffusion plate or the surface of the diffusion plate facing the light guide plate.
An electric signboard characterized by that. A light source, a light guide plate, a diffusion plate, and a film fixing unit for hanging and fixing the film so as to cover the surface of the diffusion plate facing away from the light guide plate ,
A light transmission plate is further provided between the light guide plate and the diffusion plate, and an uneven structure is provided on at least one surface of the light transmission plate.
An electric signboard characterized by that. 3. The electric signboard according to claim 1, wherein the concavo-convex structure is a structure for preventing adhesion between a surface provided with the concavo-convex structure and a surface facing the surface. . The film fixing part includes a first fixing part for fixing a part of the film, a second fixing part for fixing the other part of the film, and a screw ,
Each of the first fixing portion and the second fixing portion is provided with a groove having a bent shape,
When the first fixing portion and the second fixing portion are slid in directions away from each other in a state where the screw is inserted into the groove, the first fixing portion and the second fixing portion are disposed between the first fixing portion and the second fixing portion and the diffusion plate. The said film is fixed between the 1st fixing | fixed part and 2nd fixing | fixed part, and the said diffusion plate by narrowing a clearance gap, The Claim 1 characterized by the above-mentioned. Illuminated signboard. The electric signboard according to any one of claims 1 to 4, further comprising a latching portion for latching the four corners of the film on the diffusion plate. An illuminated signboard,
A light source, a light guide plate, a diffusion plate,
A power supply unit for supplying power to said light source,
The power supply unit, a holding unit for holding the light source and the light guide plate,
And a fixing unit for fixing the decorative illumination signboards on the wall,
An uneven structure is provided on the surface of the light guide plate facing the diffusion plate, or on the surface of the diffusion plate facing the light guide plate,
The electric signboard, wherein the holding portion is hinged to the fixed portion, and the power supply portion is exposed by rotating the holding portion. An illuminated signboard,
A light source, a light guide plate, a diffusion plate,
A power supply for supplying power to the light source;
A holding unit for holding the power supply unit, the light source, and the light guide plate;
A fixing portion for fixing the electric signboard to the wall surface,
A light transmission plate is further provided between the light guide plate and the diffusion plate, and an uneven structure is provided on at least one surface of the light transmission plate,
The electric signboard, wherein the holding portion is hinged to the fixed portion, and the power supply portion is exposed by rotating the holding portion. A light source, a light guide plate, and a diffusion plate;
An uneven structure is provided on the surface of the light guide plate facing the diffusion plate, or on the surface of the diffusion plate facing the light guide plate,
The outer peripheral portion of the surface facing away from the said light guide plate in the diffuser illuminations signboard, characterized in that recessed with respect to the inner peripheral portion of the surface. A light source, a light guide plate, and a diffusion plate;
A light transmission plate is further provided between the light guide plate and the diffusion plate, and an uneven structure is provided on at least one surface of the light transmission plate,
The electric signboard characterized by the outer peripheral part of the surface which faces back to this light-guide plate in this diffusion plate being dented with respect to the inner peripheral part of the said surface. The electric signboard according to any one of claims 1 to 9 , further comprising a transparent lid for pairing with the diffusion plate to sandwich the film. The said light source is an LED light source, The electrical signboard as described in any one of Claims 1-10 characterized by the above-mentioned. The electric signboard according to any one of claims 1 to 11 , wherein the diffusion plate is a milky white translucent plate.

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