JPH087362Y2 - Light emitting display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The light emitting display device of the present invention is intended to bring out a desired display in a light emitting state on a wide surface of a transparent display plate, particularly in a dark place. The display function is enhanced at night.

This type of light emitting display device is used as an indicator for entrances and exits of buildings, passageways, etc., and also as a location display of properties such as a fire hydrant and fire extinguisher storage, and is also used for various purposes such as signboards and advertisements.

[Prior Art] To introduce light from the end surface of a transparent display plate to cause the characters, patterns, etc. on the wide surface of the transparent display plate to emit light, a transparent surface of the transparent display plate is used. A pattern in which characters, patterns, etc. are engraved in part to provide an uneven surface, and the light that is totally reflected inside the display plate is diffused at this part and emitted to the outside of the transparent display plate. There is.

[Problems to be Solved by the Invention] However, in the light emitting display device according to the related art as described above, in order to form a pattern such as characters and patterns by engraving or etching a transparent display plate,
Its production cost becomes expensive. Further, since patterns such as characters and patterns emit and manifest only a single color of light from the light source, the change is scarce and the display function is monotonous. In addition, the formation of patterns by engraving, etching, etc. has been inconvenient in terms of maintenance because it is covered with dust over the years and the function of revealing the light-emitting display is impaired, and it is necessary to wash it occasionally. In the present invention, these drawbacks and disadvantages are remedied, light for display is easily introduced, various changes can be given to the light emitting display, and the light emitting display is easy to maintain. It is intended to provide the device at a low cost.

[Means for Solving the Problems] It is a well known fact that when light is incident on the interface between an optically sparse medium and an optically dense medium, light refraction occurs at the incident point of the interface. Is. In this case, if the incident angle of light at the incident point is i and the refraction angle is r, The following relation is established, and this value N is known as a relative refractive index of each medium, and is generally recognized as an intrinsic refractive index of the medium on the refracted light side when the medium on the incident light side is air. Has been done. That is, assuming that the refractive index of the air layer is 1, the refractive index of each medium is determined by the above relational expression, and the refractive index N of each medium has an inherent constant value.

According to this relational expression, conversely, when light travels from an optically dense medium to an optically sparse medium, the light reaching the boundary surface becomes an optically sparse medium depending on the incident angle. No refraction is emitted toward the surface, and total reflection is performed at the incident point. In this case, the incident angle at which total reflection starts and refraction emission does not occur is called a critical angle, which is recognized as a limit point of refraction and reflection. This critical angle is therefore governed by the relative index of refraction when the interface is formed by two different media.

Phenomenon in which light introduced from the end face of a transparent panel plate, such as a glass plate or an acrylic resin plate, advances to the other end face while repeating total reflection in the same plate, and does not exit toward the outside of a wide plate surface It is also understood that the fact that light can be transmitted by an optical fiber without being emitted to the outside is a phenomenon determined by the related refractive index.

Focusing on such a relational refractive index, a transparent display plate having the function of totally reflecting the light is provided in a tape-like or thin-film form with an adhesive having a refractive index slightly different from that of the display plate. Expect refracted light toward the adhesive layer at the interface between the display board and the adhesive layer by bonding the pattern and, if necessary, using the pattern having a different refractive index from the adhesive. Moreover, when this refracted light reaches the pattern surface, it is diffusely reflected, and the light can be emitted to the outside from the wide plate surface opposite to the plate surface of the display plate on which the pattern is attached, Or, at the boundary surface between the transparent display board and the adhesive layer, the light totally reflected inside the display board is captured and made into the refracted light toward the adhesive layer, and then the relationship between the adhesive layer and the pattern is refracted. Considering the rate, the light refracted into the pattern at those interfaces Extraction, it is also conceivable to further light emitted from the pattern to the outside.

That is, considering the phenomenon that the light traveling through the transparent display plate is totally reflected inside the display plate because the refractive index peculiar to the transparent display plate is larger than the refractive index of air 1, the refraction of the transparent display plate is considered. Relationship between the adhesive having a refractive index close to that of the refractive index and the refractive index of the transparent display panel The refractive index approaches 1, and as a result, the critical angle also increases and the light traveling through the transparent display panel is totally reflected. Refraction can be introduced into the adhesive layer of the pattern portion. Similarly, the relationship between the adhesive layer and the pattern is set to 1
It is also possible to guide refracted light toward the inside of the layer of the pattern by setting the value closer to or more than 1 so as to be refracted and emitted from the pattern layer to the outside.

Based on such knowledge and reasoning, a metal tape or vinyl tape coated with a transparent adhesive agent having adhesiveness is attached as a pattern to a transparent display plate such as an acrylic resin plate, a methacrylic resin plate, or a glass plate. As a result of experiments, they succeeded in actually making these pattern parts shine brightly from the display board and obtaining sufficient vision.

[Embodiment] Hereinafter, the actual state of the light emitting display device of the present invention will be described in detail with reference to each embodiment.

The first embodiment shown in FIG. 1 and FIG. 2 is the simplest to implement because of its structure. In FIG. 11, 11 is a transparent thickness such as acrylic resin used as a transparent display plate. It is a panel board with a
Clear adhesive with a refractive index slightly different from that of 11.
Cutout patterns 13 such as letters and patterns are adhered to each other by 12. At the upper edge of the panel plate 11, there is provided a fiber mounting plate 15 for supporting the end portions of a large number of optical fibers 14, 14, ... By this, the cut end face of each optical fiber and the upper edge of the panel plate 11 are arranged. Occupy opposite positions. In the illustrated embodiment, since the panel plate 11 has a horizontally long shape, the fiber mounting plate 15 is provided with a plurality of optical fibers 14, 14 ... When used as a vertically long and slender display panel, a transparent rod-shaped body of the same kind is used as a rod-shaped display panel different from the panel board 11, and in this case, a single optical fiber 14 or an optical fiber group in which this is focused It is needless to say that an optical fiber group in which several to several tens of the optical fibers 14, 14 ... Which are arranged in a line are bundled may be arranged in order to improve the luminous display efficiency. . Reference numeral 16 is a reflector provided on the end face on the opposite side of the panel plate 11 in order to increase the efficiency of the light introduced by the optical fibers 14, 14 ... As a result, the light that is totally reflected in the panel plate 11 and reaches the reflection plate 16 is retrogressed again, and the light emitting display action by the pattern 13 is enhanced.

In the first embodiment having such a structure, as shown in FIG. 6, the panel board is passed from the light source 17 through the optical fiber 14.
The light reaching the end face of 11 travels in the panel plate 11 while undergoing total reflection in the panel plate 11 having a larger refractive index than air,
The light is reflected by the reflection plate 16 on the opposite end face of the panel plate 11, goes backward in the panel plate 11 again, and proceeds toward the upper end face of the panel plate 11 while repeating total reflection. In this process, of the light traveling while being totally reflected in the panel plate 11, the light reaching the portion of the pattern 13 bonded and adhered by the transparent adhesive 12 is as shown in its enlarged view in FIG. , The light reflected at the interface between the panel plate 11 and the adhesive 12 and the light that is refracted at the interface and travels into the layer of the adhesive 12, and the reflected light is again reflected. Although the light travels while undergoing total internal reflection, the light that travels inside the layer of adhesive 12
Of the light that reaches the boundary surface between the layer of the adhesive layer 12 and the layer of the pattern 13 and is reflected again there, traveling through the layer of the adhesive agent 12 and refracted in the panel board 11, and the layer of the adhesive agent 12 and the layer of the pattern 13 The light is diffusely reflected on the boundary surface, is refracted in the panel board 11 through the layer of the adhesive 12, and is further refracted from the panel board 11 to the air layer outside the wide board surface. In this case, if the pattern 13 is made of a material that does not transmit light such as a metal film, the light refracted in the layer of the adhesive 12 is totally reflected at the boundary surface between the layer of the adhesive 12 and the layer of the pattern 13. However, if the pattern 13 is a light-transmissive thin film, it depends on the relative refractive index between the refractive index of the adhesive 12 and the refractive index of the pattern 13, that is, the refractive index of the pattern 13 is the refractive index of the adhesive 12. If it is smaller, the light refracts and travels in the layer of the pattern 13, and further the light further refracts and travels from the layer of the pattern 13 toward the external air layer.

As described above, in the light emitting display device of the present invention, the panel plate
Since a part of the light that reaches the portion where the pattern 13 is bonded and adhered by the adhesive 12 out of the light that is totally reflected in 11 is diffusely reflected by the pattern 13 and is emitted to the outside of the panel plate 11. The display plate formed by the panel plate 11 and the pattern 13 is provided with light emission display by light reflection according to the characters and the pattern shown by the pattern 13, and particularly in a dark place, at night, etc., according to the shape of the pattern 13. It becomes a light character and a light pattern, and the pattern is raised in a bright state on the transparent panel plate 11.

In actual practice, in order to further enhance the light emitting display function, similarly to the case where the reflection plate 16 is provided on the lower end surface of the panel plate 11, this is also the case with the panel plate 11 for the fiber mounting plate 15.
If a reflection plate is provided on the surface opposite to the optical fiber 14 except for the cut end surface, or if a metal deposition surface is formed on the same surface as the fiber mounting plate 15 except for the cut end surface of the optical fiber 14, the panel plate 11 The light introduced from the upper end surface by the optical fibers 14, 14 ... Repeats total reflection in the panel plate 11, and the light emitted from the outer surface of the panel plate 11 is limited to only the portion where the pattern 13 is provided. As a result, the desired light emitting display function is further improved.

In the example shown in FIGS. 3 and 4 shown as the second embodiment of the present invention, a horizontal support shelf 18 is used, and a support frame for suspending the light source device 27 and the panel 11 serving as a light source thereto. The body 19 and the attached one are shown. In the figure, the parts denoted by the same reference numerals as those in the first embodiment indicate the same members. The light source device 27 is mounted and fixed on the upper surface of the support shelf 18, and the group of bundled optical fibers 14 guided from this is fixed to the lower surface of the support shelf 18 through the holes 20 formed in the support shelf 18. The individual optical fibers 14, 14 ... Separated in the box-shaped support frame 19 are arranged in a row on a fiber mounting plate 15 which is located facing the upper edge of the panel plate 11. In this case, through holes 21, 21 are formed in the upper edge of the panel plate 11 and are aligned with the through holes 23, 23 formed in the supporting edge portions 22, 22 of the supporting frame body 19 facing each other. Then, by the bolt 24 penetrating each of these through holes 21 and 23 and the nut 25 screwed to the end portion thereof, the panel plate 11 is provided between the support edge portions 22 and 22.
Are clamped and held. Compared to the first embodiment, this embodiment is a group of optical fibers that converges between the supporting frame body 19 and the light guide end face of the panel board 11 in order to effectively guide the light from the light source. It is different in that it is configured and the mounting manner as an actual display device is clarified.

In these first and second embodiments, the pattern 13 is made to stand up on the panel board 11 by a single light, for example, white light, but if the pattern 13 itself is colored, the display pattern that stands out is The colored light is dominated by the color of the coloring.

FIG. 5 shows an actual example in which the color light according to the pattern 13 for light emission display is sequentially changed with time. Fifth
Also in the illustrated embodiment, parts designated by the same reference numerals as those used in the first embodiment shown in FIGS. 1, 2 and 6 represent the same members. In this case, the light from the lamp that becomes the light source 17 is not directly input to the end surface on the light source side where the optical fibers 14, 14 ... Are focused, and the end surface of the fiber group where the lamp and the optical fibers 14, 14 ... A color filter disk 26 having a center of rotation at a position deviated from the outer diameter of the same end face is interposed therebetween. The color filter disk 26 has a fan-shaped color filter portion obtained by appropriately dividing the circular surface,
For example, it has a red filter, a yellow filter, a green filter, a blue filter, etc. These are divided with an appropriate center angle, and different color lights are sequentially made incident on the optical fiber group by the slow rotation of the same color filter disk. is there. 28 is a driving motor incorporated with a speed reduction mechanism so as to rotate the color filter disk 26 at a very low speed, and the rotation center of the color filter disk 26 is attached to the speed reduction shaft 29 thereof.
Therefore, when the lamp as the light source 17 is turned on, and the motor 28 is supplied with electric power and rotated, the color filter disk 26 is rotated at a very low speed, and the end surface where the optical fibers 14, 14 ... The color light according to the color of the color filter sequentially positioned in the part connecting the line and is input, and this color light is sequentially introduced into the panel plate 11 via the optical fibers 14, 14 ... Total reflection is performed at. It is already described in the seventh embodiment in the first embodiment that the totally reflected light that travels through the panel plate 11 and is reflected by the reflection plate on the end face thereof is emitted to the outside of the panel plate 11 at the portion of the pattern 13.
As described in the description of the figure.

[Effects of the Invention] As is apparent from the structure described in each of the above embodiments and the operation thereof, in the light emitting display device of the present invention, the light incident from the end face of the panel plate 11 causes a wide surface of the plate to be illuminated. Not only can the shape of the pattern 13 adhered to, and the bright display according to the pattern be embossed, but also the slight difference in the refractive index between the panel board 11 and the adhesive 12 and the pattern 13 adhered by this can be utilized. Then, since the brilliance display is performed by the pattern 13 with the refracted light and the diffused reflection on each of the boundary surfaces, in the actual production, a metal tape or a color tape coated with a transparent adhesive adhesive on the back surface is used. , From the simple work of cutting out this to the required letters and patterns and pasting it on the wide surface of the panel board 11,
The light emitting display function can be exhibited well. Further, since the light from the light source 17 is introduced through the optical fibers 14, 14 ..., effective light emission display can be performed without light loss such as external light leakage, and therefore, there are many practical points to note.

[Brief description of drawings]

1 is a side view showing an embodiment of a light emitting display device according to the present invention, FIG. 2 is a front view showing a part thereof, and FIG. 3 is a horizontal support shelf for suspending a light emitting display unit. FIG. 4 is an exploded perspective view showing a relationship between a supporting frame body attached to the supporting shelf and a light emitting display plate, and FIG. 5 is a display character using a rotary filter for color light conversion. In contrast, FIG. 6 is a schematic perspective view showing an example in which light emission display of different color light is performed with time transition, and FIG. 6 is a schematic explanatory view showing light paths in the embodiments shown in FIGS. 1 and 2. FIG. 7 is a partial side view showing an enlarged view of the actual state of the light path in the portion where the patterns are overlapped. 11 ... Transparent panel board, 12 ... Adhesive 13 ... Pattern, 14 ... Optical fiber 17 ... Light source, 26 ... Color filter disk 28 ... Deceleration drive motor

Claims (5)

[Scope of utility model registration request] 1. An end face of a transparent display plate is used as a light introducing part, and a light emitting end of an optical fiber for guiding light from a light source is arranged in the light introducing part, and the display is provided on the plate face of the display plate. A light-emitting display device characterized in that a pattern consisting of characters, patterns, etc. coated with a transparent adhesive having a refractive index close to that of the plate is attached. 2. An end face of a transparent display plate is used as a light introducing part, and a light emitting end of an optical fiber for guiding light from a light source is arranged in the light introducing part, and the light introducing part is provided on the end face of the display plate. Is provided with a light-reflecting portion on the opposite end face, and a pattern composed of letters, patterns, etc. is applied to the plate surface of the display plate by applying a transparent adhesive having a different refractive index close to that of the display plate. A light emitting display device characterized by being attached. 3. An end face of a transparent display plate is used as a light introducing part, and a light emitting end of an optical fiber for guiding light from a light source is arranged in the light introducing part, and the light introducing part of the display plate except the light introducing part is arranged. A light-reflecting portion is provided on each end face, and a pattern composed of letters, patterns, etc. is applied to the plate surface of the display plate by applying a transparent adhesive having a different refractive index close to that of the display plate. A light-emitting display device characterized in that 4. An end face of a transparent display plate is used as a light introducing part, and a light emitting end of an optical fiber for guiding light from a light source is arranged in the light introducing part, and the display is provided on the plate face of the display plate. It consists of letters, patterns, etc. coated with a transparent adhesive having a refractive index close to that of the plate, and a pattern having a metallic reflecting surface is attached on the surface coated with the adhesive. And a light-emitting display device. 5. An end face of a transparent display plate is used as a light introducing part, and a light emitting end of an optical fiber for guiding light from a light source is arranged in the light introducing part, and the display is provided on the plate face of the display plate. A pattern consisting of letters, patterns, etc. coated with a transparent adhesive having a different refractive index close to that of the plate is pasted, and the pattern consisting of letters, patterns, etc. is A light-emitting display device characterized by being formed of a light-transmissive material having a different refractive index close to that of the index.