JP2018146788A - Display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display that three-dimensionally display a display object, such as a character.SOLUTION: A display comprises: a light guide plate that has an outer peripheral edge along the contour of a display object including a character or a diagram; and a light source that illuminates the light guide plate. The light guide plate includes, on its front side, a plurality of inclined planes that extend along the contour of the display object inside the outer peripheral edge, and each of the plurality of inclined planes includes at least 10 steps extending along the contour of the display object. The light guide plate has a flat portion along the contour of the display object on the outer peripheral side of the plurality of inclined planes.SELECTED DRAWING: Figure 1

Description

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

  Patent Document 1 describes that a display device and a channel character device capable of notifying predetermined information evenly with high luminance by effectively using light from a light source is described. This display device includes a light source unit provided with a light source disposed in a predetermined plane, and a plate-shaped light guide plate in which light from the light source is incident from one end surface and emitted from the other end surface facing the one end surface. The light source has a light emitting unit provided upright from a predetermined plane of the light source, and a housing having a housing for holding the light source and the light emitting unit, and the other end surface of the light guide plate has characters, figures and symbols. , Or a combination of these, it is formed from a shape that borders at least the outline.

JP 2012-194518 A

  In a device that displays characters by illuminating them with light from a light source such as an LED, or displays them together with illumination, instead of displaying the characters in a plane, it is more beautiful and conventional. There is a demand for a display device capable of different expressions.

  One embodiment of the present invention is a light guide plate having an outer peripheral edge along a contour of a display target including characters or figures, and a plurality of inclined surfaces extending along the contour of the display target inside the outer peripheral edge on the front side. In addition, each of the plurality of inclined surfaces is a light guide plate including at least 10 streaks extending along the outline of the display target. In a display device having this light guide plate and a light source disposed on the back side opposite to the front side of the light guide plate, the display object, for example, the inside of the character, has three-dimensionally different angles along the character outline It is expressed by the fact that multiple slopes protruding or sinking at shining. Furthermore, since streaks due to a number of steps are formed on the slopes, light is refracted in a complicated manner by a plurality of steps having different directions, and the slopes are expressed by various intensities and colors. Depends on the position and angle of the viewer. Therefore, characters and the like can be three-dimensionally expressed by light from the light source in a manner different from conventional ones. In addition, when sunlight hits the slope during the daytime, the light is reflected or colored in various directions due to the many steps on those slopes, so that characters can be expressed three-dimensionally even during the daytime. It can be seen with different taste depending on the position and angle.

  A typical example of the light guide plate is such that the inclined surfaces provided with a large number of steps are projected from the outside so that the inclined surfaces are easily recognized from the outside, and the multiple steps are combined in a pyramid shape. The inclined surface may be a single inclined surface or may be an inclined surface disposed on both sides of the top portion extending along the display target. The light guide plate has a top portion extending along the center of the display target, and the plurality of inclined surfaces may be disposed on both sides of the top portion. The top portion may have a plateau shape with a certain width, or may have a ridge shape close to a line.

  The light guide plate may have a flat portion along the outline of the display target on the outer peripheral side of the plurality of inclined surfaces. The outline of a display object such as a character can be stably expressed by illumination (display) light that passes through a flat portion, and what is viewed can display the display object such as a character in a more easily viewable state.

  The steps formed on the plurality of slopes may be connected at the boundaries of the plurality of slopes, and may include a plurality of edges along the contour of the display target. It can be expressed by a large number of edges composed of multiple lines such as contour lines on a plurality of slopes along the outline of a character or the like. The display object such as characters can be displayed three-dimensionally with a large number of edges extending horizontally like a large number of wefts. Using this light guide plate, it is a soft expression like a tapestry, but it is clear and bright. In addition, display objects such as characters can be expressed by light.

  The back side of the light guide plate may have an inclination along a plurality of slopes, but may be a flat surface so that light can be efficiently taken into the light guide plate. The back side may be provided with unevenness of an appropriate density so as to function as a diffusion plate, and light may be input to the back side via the diffusion plate. That is, the display device may have a diffusion plate disposed between the light guide plate and the light source. An example of the light source is an LED panel including a flat light guide plate around which an LED tape is attached.

  A light guide plate that displays a display object such as a character three-dimensionally may be attached to the housing as a single unit or connected to other characters, etc., and a small light guide plate may be used for elevator floors or indoor offices. It may be used for guidance or the like. Larger ones may be signs, cut letters or lighting attached to the outer wall. The display device may have a light-shielding housing along the contour of the light guide plate, and cover at least the outer peripheral side of the three-dimensional light guide plate and the light source.

The front view which shows the outline | summary of a display apparatus. Sectional drawing which shows schematic structure of a display apparatus in the cross section II-II of FIG. The figure which extracts and shows a light-guide plate. Sectional drawing which expands and shows a part of display apparatus in the cross section III-III of FIG. Sectional drawing which expands and shows a part of slope of a light-guide plate.

  FIG. 1 shows a state in which a display device (light emitting device, signboard, and illumination device) 10 that displays characters in three dimensions is viewed from the front. FIG. 2 shows a schematic configuration of the display device 10 as a cross-sectional view as viewed from below. FIG. 3 shows the light guide plate 20 extracted. Further, FIG. 4 shows an enlarged partial cross section of the display device 10. The display device 10 is a device called 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.

  This display device 10 includes a light guide plate 20 having an outer peripheral edge 21 along a contour 11 to be displayed such as characters, an LED panel (light source) 30 disposed on the back side 29 via a diffusion plate 15, and an LED panel. The light guide plate 20, the light guide plate 20, the diffuser plate 15, the LED panel 30, and the outer peripheral side of the diffuser plate 16, which are arranged on the back side of the light guide plate 30, are covered with metal and are supported so as to sandwich them Housing 14 (chassis, box). The housing 14 is fixed to the outer wall 5 of the building by a stud bolt 13 or the like.

  An example of the light guide plate 20 is a transparent acrylic plate or a polycarbonate plate, which may be colored in a specific color while securing a certain degree of transparency. An example of the diffusion plates 15 and 16 is a milky white acrylic plate or a polycarbonate plate. The diffusion plate 15 includes a function of further averaging the light from the LED panel 30 and supplying the light to the light guide plate 20. Therefore, the diffusion plate 15 may be omitted depending on the design and specifications. An example of the light source 30 is an LED panel. The display device 10 is of a type in which a plurality of LEDs, which are light emitting elements, are attached by a LED tape 32 around a light guide plate 31 including a plurality of grooves that are flat and laser processed inside. The LED panel which can irradiate (illuminate) light from a wide range with more power saving is employed.

  This display device 10 is a double-sided light emitting type, emits light 38 from the light guide plate 20 on the front side 18 that displays characters in three dimensions, and also faces the wall 5 on the back side 19 via the diffusion plate 16 on the back side. Light 39 is emitted to illuminate the wall 5. The housing 14 has a shape along the contour (outer peripheral edge) 21 of the light guide plate 20, that is, the contour 11 of the letter H, and the light 39 emitted from the back surface of the display device 10 to the wall 5 is also H. 5 and the function of floating the letter H from the wall 5 is exhibited. The display device 10 may be a front light-emitting type. In this case, the rear diffusion plate 16 is not provided, and the light-shielding housing 14 covers the rear side 19.

  The light guide plate 20 is an acrylic plate having an outer peripheral edge 21 along the outline 11 of the character H or a display object including characters or figures, in this example. The light guide plate 20 includes, on the front side 28, a plurality of slopes 22 extending along the outline 11 of the character H to be displayed inside the outer peripheral edge 21, that is, along the outer peripheral edge 21, and each of the plurality of slopes 22 is a display target. A plurality of steps 25 extending along the contour 11 of the first step. The light guide plate 20 includes, on the front side 28, a ridge line 23 extending along the center of the decorative character (font, cut character, channel character), in particular, a line segment included in the character so as to draw the character H, The plurality of slopes 22 are disposed on both sides of the ridge line 23.

  More specifically, the light guide plate 20 of the present example includes a pair of slopes 22a extending vertically along the outside of the pair of ridge lines 23a extending vertically, and a ridge line 23a so as to form the outline 11 of the letter H. A pair of slopes 22b extending up and down along the inner upper part, a pair of slopes 22c extending up and down along the inner lower part of the ridge line 23a, and a pair of slopes extending left and right along the ridge line 23b extending left and right 22d. The light guide plate 20 further includes a plurality of inclined surfaces 22e extending left and right so as to form upper and lower ends of the ridge line 23a. In the following description, the slope 22 is used when the description is made without specifying the slope, and the ridge line 23 is shown when the description is made without specifying the ridge line.

  In the light guide plate 20 of this example, the angles of the inclined surfaces 22a to 22e are set to be the same, but the angles of the inclined surfaces 22a to 22e may be different, not both sides of the ridge lines 23a and 23b, A single slope having the slope 22 only on one side may be used, and the slopes 22e at both ends of the ridge line 23a may be vertical walls instead of slopes. In the light guide plate 20 of this example having the slopes 22 on both sides and ends of the ridge lines 23a and 23b, the slopes 22 relating to all the ridge lines 23a and 23b are always visible when the light guide plate 20 is viewed from the left and right and below. This is an example of a design that makes it easy to visually recognize the character H to be displayed.

  The ridge line 23 may not be along the center of the character H, and may be provided at a position eccentric to the outer or inner end of the character H. In the light guide plate 20 of this example, the ridge line 23 that forms the apex where the inclined surfaces 22 intersect each other has the same width as the fine step 25 or a width of several pieces, and is narrow enough to be hardly recognized as a flat surface. Although it is linear, instead of the ridgeline 23, a plateau having a width that allows the top to be recognized as a plane, for example, a width in the range of 5 to 20 mm, a width in the range of 7 to 15 mm, or a width of around 10 mm. It may be.

  The light guide plate 20 further includes a flat portion (planar portion) 24 along the outline 11 of the character H to be displayed on the outer peripheral edge 21 side of the plurality of inclined surfaces 22. Therefore, when the light guide plate 20 is illuminated from the back side (back side) 29 by the LED panel 30, the outermost side of the character H to be displayed is expressed by the light 38 that has passed through the plane part 24. Since the flat portion 24 is the thinnest in the light guide plate 20 and is flat (flat), the light 38 having the highest intensity (luminance) is easily output because the areas on the input side and the output side are equal. For this reason, by providing the plane part 24, the outermost side of the character H can be expressed brightest, and the character H can be displayed in a state where it can be more easily recognized. The width of the flat portion 24 may be in the range of 10 to 20 mm, or may be in the range of 15 to 20 mm, and the width W1 of the flat portion 24 on one side is the narrowest of the light guide plate 20 including the slope 22. It may be in the range of 10 to 20% of the width W0 of the portion, for example, the width W0 of the portion showing the character line, or may be in the range of 15 to 20%. The width W0 of the portion indicating the character line may be in the range of 50 to 300 mm, or may be in the range of 100 to 200 mm.

  On each inclined surface 22 of the light guide plate 20, a number of steps 25 extending along the outline 11 of the letter H, that is, the outer peripheral edge 21 of the light guide plate 20 are formed. The height H of each slope 22 may be at least 10 mm, may be in the range of 20-100 mm, and may be in the range of 30-100 mm. Each slope 22 includes at least 10 steps 25 having a height of about 1 to several mm, and may include steps 25 in the range of 15 to 50, and steps in the range of 20 to 50. 25 may be included.

  As shown in an enlarged view of a part of the slope 22 in FIG. 5, the step 25 may be a combination of a vertical surface 25a and a horizontal surface 25b, and a right angle or an angle close to the surface 25a and 25b. A sharp edge 26 may be formed. The edge 26 may be obtuse. The height h and width w of the step 25 may be in the range of 1 to 8 mm, in the range of 1 to 5 mm, or in the range of 2 to 5 mm. The height h and the width w may be the same or different. Such a step 25 can be formed by cutting a base material of the light guide plate 20 such as acrylic, and the edge 26 formed by the step 25 at the time of cutting may be smoothly finished or cut. It is not necessary to finish in the state. Depending on the state of the edge 26, the state of light passing through the edge 26, or being scattered or refracted by the edge 26 is different, and various aesthetic effects may be produced.

  In the light guide plate 20, the ridge line 23 serving as the top has the same height throughout the character H, and the ridge line 23 expresses the character H at the same height. Further, the same number of steps 25 are formed on each inclined surface 22, and each step 25 is continuous at the corner of each inclined surface 22, and each step 25 and the edge 26 become contour lines 27 indicating the outline 11 of the letter H. ing. Furthermore, the connecting portion between the inclined surface 22d extending in the left-right direction and the adjacent inclined surfaces 22b and 22c extending in the vertical direction is a curved surface, and the step 25 is also connected in a curved line. Therefore, the connection portion between the slopes is not easily emphasized, and the design is such that the letter H indicated by the ridge line 23 is emphasized. The connection between these slopes and the design of the ridge line 23 are examples, and can be deformed by characters, figures, fonts, and the like expressed by the display device 10.

  In the display device 10 having such a light guide plate 20 and a light source 30 disposed on the back side 29 of the light guide plate 20, the inside of the character H to be displayed is three-dimensionally along the outline 11 of the character H. In addition, it projects like a horizontally long pyramid or a truncated pyramid having a plurality of slopes 22 or in a pyramid shape, and these slopes 22 are expressed by shining. Therefore, the character H is expressed not in a plane but in a state of three-dimensionally protruding from the wall 5 or the like.

  Further, the slopes 22 are provided with a number of steps 25 and lines (contour lines) 27 formed by the edges 26 formed by the steps 25. Therefore, in this display device 10, the letter H is composed of a plurality of inclined surfaces 22 having different directions, vertical surfaces 25a and 25b of a number of steps 25 formed on each inclined surface 22, and the surfaces 25a and 25b. Represented by light 38 that passes, refracts, or reflects a number of elements, such as the formed edge 26. For this reason, the character H that is three-dimensionally raised and displayed by the plurality of inclined surfaces 22 has a complicated change in intensity, color, and the like of the light 38 that represents the character H depending on the viewing direction and angle of the display device 10. Therefore, the character of the letter H displayed on the display device 10 differs depending on the position and angle of the person who sees it, and is different from that of the conventional display device. It can be displayed with light from.

  Further, in the display device 10, when sunlight hits the slopes 22 of the light guide plate 20 during the daytime, characters are displayed three-dimensionally by the slopes 22. There is a possibility that light is reflected in various directions by the edge 26 or refracted so that various colors appear. For this reason, not only the expression by the light from the light source 30 at night but also the characters are three-dimensionally expressed in the daytime and can be viewed with different tastes depending on the position and angle of the viewer.

  In addition, the light guide plate 20 of this example includes a flat portion 24 around the inclined surface 22, so that the outline of the letter H can be displayed more clearly by the light from the light source 30. Furthermore, the back surface (back side) 29 of the light guide plate 20 is a flat surface, and light from the flat light source (LED plate) 30 can be efficiently taken into the light guide plate 20. It can discharge | release outside from each slope 22 through the inside. Therefore, the display device 10 can display characters and the like more brightly and three-dimensionally.

  Further, the steps 25 formed on the plurality of slopes 22 are connected at the boundaries of the plurality of slopes 22, and the light guide plate 20 includes a plurality of edges 26 along the outline 11 of the character H to be displayed. With these edges 26, the letter H is displayed on the surface (slope) 22 so as to be represented by multiple lines (wefts) such as contour lines 27. For this reason, in this display device 10, depending on the viewing direction, for example, the inside of the letter H is expressed in a soft manner such as a tapestry that displays a picture with a number of wefts, and the outline 11 of the letter H is expressed by the flat part 24. It becomes possible to express clearly and clearly.

  Note that the above-described sizes and the like are examples, and the present invention is not limited to these. Further, the above-mentioned size relates to a store sign attached to an outer wall or the like, a display device 10 suitable as a lighting device, a size related to an elevator stop floor display device, a small display device installed indoors, or the like. May be different from the above.

  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 figure including a symbol, a picture, or the like. It may be. In the above description, the display device 10 using an LED light source has been described as an example. However, the light source 30 may be a semiconductor laser, an organic EL, or the like.

10 display device, 20 light guide plate, 22 slope, 25 steps

Claims (11)

A light guide plate having an outer peripheral edge along a contour of a display object including characters or figures,
The front side includes a plurality of inclined surfaces extending along the outline of the display object inside the outer peripheral edge,
Each of the plurality of slopes is a light guide plate including at least 10 streaks extending along an outline of the display target. In claim 1,
The light guide plate, wherein the plurality of slopes include slopes protruding from a surface. In claim 2,
On the front side, having a top extending along the display object,
The plurality of slopes are light guide plates disposed on both sides of the top. In claim 3,
The top is a light guide plate extending along a center of the display target. In any of claims 2 to 4,
The said top part is a light-guide plate which forms the plateau or ridgeline along the said display object. In any of claims 1 to 5,
A light guide plate having a flat portion along an outline of the display object on an outer peripheral side of the plurality of inclined surfaces. In any one of Claims 1 thru | or 6.
The step formed on the plurality of slopes is connected to the boundary of the plurality of slopes, and includes a plurality of edges along the outline of the display target. In any one of Claims 1 thru | or 7,
The light guide plate is flat on the back side. A light guide plate according to any one of claims 1 to 8,
And a light source disposed on an opposite side of the front side of the light guide plate. In claim 9,
Furthermore, the display apparatus which has a diffusion plate arrange | positioned between the said light-guide plate and the said light source. In claim 9 or 10,
The display device further includes a light-shielding housing along an outline of the light guide plate, the housing covering at least an outer peripheral side of the light guide plate and the light source.

Images