JP6232340B2 - Display device - Google Patents

Description

  The present invention relates to a display device that displays characters or graphics.

  Patent Document 1 discloses a technique for making the appearance of a cut-off lighting character for displaying a store logo mark extremely thin to make the appearance smart and ensuring the uniformity of the luminance of the illumination. In Patent Document 1, a box having a standing wall on the outer periphery formed in a cut character shape, a light guide plate that performs light guide illumination, and a surface diffusion plate that closes the opening of the box, and a light source for the inner periphery of the standing wall The LED module in which LED chips are arranged in a high density on a flexible substrate is arranged in the light source part, and the end face of the light guide plate facing the light source part and the non-light source part is made the incident end face part and the reflective end face part. Then, an illumination cut character is formed by applying a reflection measure to the reflection end face portion.

JP 2008-256920 A

  The diffusion surface plate is provided with a light diffusion function by, for example, roughening the back surface and making the whole milky white or coloring while maintaining translucency. It is also possible to make a cut letter shape with an appropriate resin such as acrylic or polycarbonate that prevents the see-through of the image. The diffusion surface plate is fitted and arranged in a box, and for example, the diffusion surface plate is fitted into the box to prevent exposure of a fitted end portion or a step formed by the side surface. The appearance may be maintained well. For example, the diffusion surface plate may be fitted with a thickness of about several millimeters, for example, about 5 mm, and all or part of the outer peripheral end surface thereof is cut out in an L-shaped cross section, and the upper end of the box is formed on the end surface. A mounting projection piece to be mounted on the edge is formed. At the same time, by arranging a notch step at the bottom of the end face, fitting the notch step to the inner wall of the standing wall of the box, or by screwing with a screw screwed into the notch step from the upper side of the box side surface, Fix to the box.

  Instead of processing the outer peripheral end face of the diffusion plate or translucent plate constituting the light output portion in the display device, a housing 92 is provided along the outer periphery of the translucent plate 91 as in the display device 90 shown in FIG. A receiving plate 95 is welded along the entire periphery of the upper end portion 94 of the wall body 93, the translucent plate 91 is mounted on the receiving plate 95, and the periphery of the translucent plate 91 is screwed to the housing 92 with a frame-like frame 96. 97 may be fixed. The housing 92 is a light-shielding member such as stainless steel, and by disposing the LED 98 therein, light is output to the outside through the translucent plate 91 on the surface, and the figure drawn on the translucent plate 91 When a character or the like is illuminated, or when the translucent plate 91 is a cut character or a figure, the character or figure can be illuminated so as to be raised. Inside the housing 92, a light diffusing or uniforming means such as a light guide plate can be further disposed, and the light transmitting plate (light output plate) 91 on the surface can be illuminated with a more uniform illuminance.

  In such a display device, a device that can be assembled at a lower cost is desired.

  One embodiment of the present invention is a housing including a metal wall provided along a contour of a display target, and a light-transmitting plate including a contour of the display target, the light transmitting mounted on the tip of the wall The display device includes a plate, a frame that surrounds the translucent plate, attaches the translucent plate to a wall, and a plurality of solid light sources arranged inside the housing. The tip of the wall of the display device includes a corrugated portion.

  In consideration of thermal expansion, it is preferable that the contour of the light transmitting plate is smaller than the contour formed by the wall body. The contour of the frame is preferably larger than the contour formed by the wall in consideration of fitting into the wall. By providing the corrugated portion at the tip of the wall, a light-transmitting plate having a small contour can be mounted on the tip of the wall, and the tip of the wall can be covered with a frame having a large contour. The corrugating process can be added by cold working or swaging the metal plate into an uneven or corrugated shape with a caulking tool or the like at the tip of the wall. The corrugated portion at the tip can be covered with a frame. If it is not necessary to cover with a frame, a corrugated plate may be used for the wall.

  The tip of the wall body may be continuously corrugated over the entire circumference, but may be intermittently corrugated, and the translucent plate can be mounted on the housing if partially corrugated.

  The display object may include characters or figures, and even if it has a complicated shape, the tip of the wall can be easily and intermittently corrugated by using a swaging tool. Therefore, it is possible to manufacture and provide a display device at a lower cost compared to the case where the receiving plate is welded over the entire periphery of the tip of the wall body or the end portion of the light transmitting plate is processed in an L shape over the entire periphery.

  The front end of the wall of the display device includes a portion that protrudes outside the edge of the light transmissive plate and forms a gap communicating with the edge of the light transmissive plate to the inside of the housing. Therefore, a gap for ventilating the inside of the housing can be provided along the wall of the housing. For this reason, it can suppress that the inside of a housing becomes hot and humid, and it can suppress that the performance of solid light sources, such as LED, deteriorates or a lifetime falls.

  A typical configuration of the frame includes an L-shaped cross section and a portion that contacts the light-transmitting plate, and a portion that is attached to the wall. The part attached to the wall includes a part that contacts the wall by corrugating the wall, and a part that forms a gap communicating with the inside of the housing between the wall and the wall. The light transmitting plate can be fixed to the housing via the frame by fixing the portion to the wall body with a screw or the like. Ventilation in the housing can be promoted by a portion that forms a gap that communicates with the inside of the housing with the wall.

If the contour of the display target includes a corner, the tip of the wall includes a corrugated portion disposed on both sides of the corner. It is possible to provide a device that can increase the irregular reflection of the corner portion, suppress the corner portion of the contour of the display target from becoming dark, and display the contour more clearly.

The perspective view which shows the outline | summary of a display apparatus. The expanded view which shows the structure of a display apparatus. The top view which expands and shows a part of housing of a display apparatus. The top view which shows the state which accumulated the translucent board on the housing. Sectional drawing which shows a part of display apparatus. Sectional drawing which shows the structure of the display apparatus for comparing with the above.

  FIG. 1 shows an appearance of a display device (light emitting device, signboard, and lighting device) 10 that displays the outline of a character with light. FIG. 2 shows a schematic configuration of the display device 10 in a developed view. The display device 10 is a device that is also referred to as a cut character signboard, a channel character signboard, or a channel character device that displays characters (including symbols), graphics, and the like, and is used as a store sign or the like. The display device 10 of this example is a device that displays a character “H” as an example of a character to be displayed. The display device 10 includes a translucent plate 20 having a contour 21 of a display target (letter H), a housing 30 including a wall 33 having a shape along the contour 31 of the display target, and the translucent plate 20 in the housing 30. A frame 50 to be fixed and an LED light source 40 disposed inside the housing 30 are included. A basically closed space is formed by the light-shielding housing 30 and the transmissive or semi-transmissive translucent plate 20, and light from the LED light source 40 is output to the outside through the translucent plate 20.

  The display device 10 includes a plurality of LED light sources 40 arranged in two rows on the bottom surface 39 of the housing 30. LED40 may be arrange | positioned at the inner surface of the wall 33 which is the side surface of the housing 30, and LED40 may be arrange | positioned by 1 row and may be arrange | positioned by 3 or more rows. Further, the display device 10 includes a light guide plate having a character or figure outline (similar outline) so as to be accommodated in the housing 30, and an LED 40 is attached to an edge of the light guide plate. In addition, the method of generating the illumination light inside the housing 30 is not limited to this example.

  An example of the translucent plate 20 that appears on the front side of the display device 10 and outputs light is a resin panel having light diffusibility. The translucent plate 20 is also called a diffusion plate, and an example is a milky white acrylic plate or a polycarbonate plate. The translucent plate 20 may be other colors, and may have a surface processed so as to diffusely reflect light, or may include a material or structure that diffusely reflects inside.

  The tip (upper end) 34 of the wall 33 of the housing 30 of the display device 10 includes a portion 35 that is corrugated so that the unevenness or corrugation protrudes inward, and a portion 36 that is not corrugated. The translucent plate 20 is mounted on the corrugated portion 35 of the wall 33 of the housing 30, and the translucent plate 20 is attached to the housing 30 by a frame (frame) 50 having an L-shaped cross section. The frame 50 is fixed to the housing 30 with screws 59 at appropriate intervals. In FIG. 2, the housing 30, the translucent plate 20, and the frame 50 are shown to be assembled in order from the bottom, but the display device 10 has characters on the wall of the building or the wall of the room from the side. Mounted so that it can be seen. Therefore, in the present specification, the up and down direction may indicate the left and right or the front and rear direction.

  FIG. 3 shows an enlarged view of a part of the housing 30 as viewed from above, and FIG. 4 shows a state in which the translucent plate 20 is mounted on the housing 30. FIG. 5 shows an enlarged partial cross section of the display device 10.

  The wall 33 of the housing 30 is a metal, for example, a thin plate made of stainless steel or aluminum, and the thickness t is about 0.2 to 1.5 mm, and more preferably about 0.4 to 0.8 mm. The corrugated portion 35 includes at least one protrusion or corrugation 35 a that protrudes from the inner surface 33 a of the wall 33 toward the inside of the housing 30 from the non-corrugated portion 36. The dimension w from the inner surface 33a of the wall 33 to the tip of the protrusion 35a is about 2 to 10 mm, and more preferably about 3 to 7 mm. The corrugated portion 35 is desirably provided with an interval (pitch) p of about 20 to 150 mm, and more preferably about 50 to 100 mm. The corrugated portion 35 may be provided continuously at the tip 34 of the wall 33.

  The tip 34 of the metal wall 33 can be corrugated by a machine or tool for cold working a metal plate. An example of a corrugating tool is for swaging the tip of a pipe to reduce the diameter and connecting the pipes together. For example, there is a swaging tool commercially available from EDMA. In this swaging tool, two teeth are inserted between three teeth, and a corrugated portion having two protrusions 35a on the tip 34 of the wall body 33 in one operation. 35 is formed.

  The corrugated portion 35 may cover the entire wall body 33, that is, the entire side surface of the housing 30. In this case, the wall body 33 can be formed of a corrugated metal plate. When maintaining the side surface of the housing 30 in a smooth state, it is desirable to corrugate a limited area near the tip 34 of the wall 33 and cover it with a frame 50. It is desirable to corrugate the range of about 50 mm from the tip 34 of the wall 33, more preferably to corrugate the range of about 30 mm, and more preferably to corrugate the range of about 20 mm. In the small display device 10, it is preferable to corrugate a range of about 15 mm from the tip 34 of the wall 33, and it is more preferable to corrugate a range of about 10 mm. In this specification, corrugating indicates that an uneven or corrugated portion is formed at the tip 34, and the uneven or corrugated shape and processing method are not limited to those disclosed in the specification.

  In consideration of thermal expansion due to temperature, the dimension in the width direction of the translucent plate 20 is set to be about 1.5% per meter with respect to the dimension in the width direction of the housing 30, that is, at least about 1.5 to 2 mm. . For this reason, the distance (gap) s1 between the outer peripheral end 22 of the translucent plate 20 and the inner surface 33a of the wall body 33 of the housing 30 is about 0.7 to 1.2 mm, and is about 0.8 to 1 mm. Is more preferable.

  The frame 50 includes a first portion 51 that is L-shaped in cross section and in contact with the upper surface 23 of the translucent plate 20, and a second portion 52 that is attached to the outer surface 33 b of the wall body 33. The width f1 of the first portion 51 is preferably about the same as or slightly wider than the dimension w of the protrusion 35a, and the width f1 is preferably about 2 to 15 mm, and more preferably about 3 to 10 mm. The width f <b> 2 of the second portion 52 is preferably such that it covers the corrugated portion 35. Therefore, the width f2 is desirably about 50 mm, desirably about 30 mm, and more desirably about 20 mm.

  The frame 50 is formed so that a gap s <b> 2 is secured between the outer surface 33 b of the wall 33 and the inner surface 52 a of the second portion 52 in order to fit into the housing 30. The gap s2 is about 0.3 to 1.0 mm, and more preferably about 0.5 to 0.8 mm. The frame 50 is fixed to the portion 36 of the wall 33 that is not corrugated by screws 59.

  Therefore, in the display device 10, the housing is provided via the gap s <b> 2 between the inner surface 52 a of the frame 50 and the outer surface 33 b of the wall body 33 and the gap s <b> 1 between the outer peripheral end 22 of the translucent plate 20 and the inner surface 33 a of the wall body 33. The inside of 30 communicates with the outside world. Since the gaps s1 and s2 are formed intermittently along the wall body 33, the gaps s1 and s2 formed along the wall body 33 forming the periphery of the housing 30 are formed between the inside and the outside of the housing 30. And the inside of the housing 30 is ventilated through the gaps s1 and s2. Therefore, even if the inside of the housing 30 is condensed or the LED 40 is turned on and becomes high temperature, the inside of the housing 30 is well ventilated, so that the inside of the housing 30 can be prevented from being in a hot and humid state. It is possible to suppress the shortening of the lifetime. For this reason, the replacement frequency of LED40 can be lengthened and the display apparatus 10 with little maintenance can be provided.

  Since these gaps s1 and s2 are covered with the frame 50, rainwater does not enter directly through the gaps s1 and s2, and even if it enters, it is discharged through the gaps s1 and s2. Even when rainwater enters the inside of the housing 30, when the display device 10 is attached to the wall surface of the building with the stud 60 or the like, holes for ventilation and drainage are provided in the lowest portion of the housing 30. It is discharged through the hole.

  As shown in FIG. 3, in the display device 10, corrugated portions 35 are disposed on both sides of the corner 37 of the housing 30. The corner 37 tends to be a place farthest from the LED 40, and the corner 37 may become dark. In the display device 10, the light 45 can be irregularly reflected in the direction of the corner 37 by the corrugated portions 35 disposed on both sides of the corner 37. Accordingly, it is possible to provide a display device 10 that can suppress a decrease in illuminance in the vicinity of the corner 37 and can display the light-transmitting plate 20 having a contour along a character or a figure evenly and brightly including the corner portion. The interval pc between the corner 37 and the corrugated portion 35 is preferably 50 mm or less, and more preferably about 30 mm or less.

  As described above, the display device 10 is provided with the corrugated portion 35 at the tip 34 of the wall 33 of the housing 30, and the translucent plate 20 having a slightly smaller outline than the housing 30 is provided on the corrugated portion 35. The translucent plate 20 is fixed to the housing 30 with a frame (frame) 50. For this reason, the process which provides a level | step difference in the peripheral edge of the translucent board 20 is unnecessary, and it is not necessary to weld a receiving board to the front-end | tip 34 of the wall 33 of the housing 30. FIG. Corrugating can be easily applied to the tip 34 of the wall 33 using a known tool or machine, and the display device 10 can be provided at a lower cost. Further, by providing the corrugated portion 35, as described above, the ventilation efficiency inside the housing 30 can be increased, and the brightness of the corner portion can also be increased. Therefore, the corner portion is bright at low cost, and the long-life display device 10 can be provided.

  In the above description, the device 10 that displays the character “H” as a display target (display target) has been described as an example. However, the display target may be a character other than “H”, and a graphic including a symbol, a picture, and the like. It may be. Further, a display device in which characters or figures are drawn on a translucent plate 20 having a quadrangular shape or a different shape may be used. In the above description, the display device 10 using an LED light source as a solid light source has been described as an example. However, the solid light source may be a semiconductor laser, an organic EL, or the like.

DESCRIPTION OF SYMBOLS 10 Display apparatus, 20 Translucent board, 30 Housing 40 LED light source, 50 Frame

Claims (5)

A housing including a metal wall provided along the contour of the display object;
A translucent plate including an outline of the display object, the translucent plate mounted at a tip of the wall body;
A frame that surrounds the periphery of the translucent plate and attaches the translucent plate to the wall;
A plurality of solid state light sources disposed inside the housing;
Wherein the tip of the wall is observed including a corrugated portion, the gap the tip of the out outside the edge of the transparent plate, communicates with the inside of the housing between the edge of the transparent plate A display device including a portion forming the same . In claim 1,
The frame includes an L-shaped cross section, a portion that contacts the light transmitting plate, and a portion that is attached to the wall body. The portion that is attached to the wall body is a portion that contacts the wall body, and the wall body. And a portion forming a gap communicating with the inside of the housing. A housing including a metal wall provided along the contour of the display object;
A translucent plate including an outline of the display object, the translucent plate mounted at a tip of the wall body;
A frame that surrounds the periphery of the translucent plate and attaches the translucent plate to the wall;
A plurality of solid state light sources disposed inside the housing;
The tip of the wall body is a display device including a corrugated portion,
The outline of the display object includes a corner,
The display device, wherein the tip of the wall includes the corrugated portions disposed on both sides of the corner. In any of claims 1 to 3 ,
The display device, wherein the tip of the wall includes the corrugated portion intermittently. In any of claims 1 to 4 ,
The display object includes a character or a graphic.

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