JPH10105094A - Light emitting type sign board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lighten a light source, to prolong the service life of the light source and to attain decrease in the opportunity of maintenance and the nonuniformity of light emission by using light from plural light emitting diode(LED) lamps for surface light source through light transmission plates as a surface light source. SOLUTION: A main body 10 of light emitting type sign board is composed of LED lamps 12 for spot display, light transmissive high luminance reflection sheet 17, light non-transmissive high luminance reflection sheet 18, opening part 21 and display character or pattern part 23 of 'STOP' or the like. A display color is determined by the selection of plural LED lamps 11 for surface light source but the light transmissive high luminance reflection sheet 17 is red, the light non-transmissive high luminance reflection sheet 18 is white and the display character or pattern part 23 of 'STOP' or the like is white, etc. Then, light from the plural LED lamps 11 for surface light source to be the surface light source of main body 10 of light emitting type sign board is converted to the surface light source due to a light transmission plate 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light-emitting sign board which facilitates night recognition, and more particularly to an improvement in visibility.

[0002]

2. Description of the Related Art A conventional light-emitting sign board is used for a road sign or the like, and there is a light-emitting sign board that enables a driver of a car or a bicycle or a pedestrian to recognize a traffic sign even in a sunset state. . As such a conventional light-emitting sign board,
JP-A-6-30889 using a surface-emitting EL lamp as a light source
No. 6 (Title of Invention: Light-Emitting Signboard, Applicant: Noda Electronics Co., Ltd.) is shown in FIG.

FIG. 7 is a view showing a conventional light emitting sign board, FIG. 7 (a) is a front view thereof, FIG. 7 (b) is a side view thereof, and FIG. FIG. 3 is an exploded configuration diagram of a marker unit main body. In FIG. 7A, the light-emitting sign plate main body 50 is used.
Include surface emitting bodies 51a and 51b such as surface emitting EL lamps for illuminating the characters "stop" of the sign and the frame line, light emitting diodes 52 for blinking light emission, and high-intensity reflective sheet 53
A solar cell 54, a proximity sensor 55, and a sunset sensor 56 are mounted around the main body, and are held by columns 57.

In FIG. 7B, reference numeral 50 denotes a light-emitting sign plate main body, 54 denotes a solar cell, 55 denotes a proximity sensor, 56 denotes a sunset sensor, 57 denotes a column 57, and 58 denotes a control unit.

[0005] In FIG.
0 is composed of eight parts, 59 is an aluminum plate, 60 is a cushion sheet, 51a and 51b are E
A surface illuminator such as an L lamp, 52 is a light emitting diode for blinking light emission, 61 is a transparent acrylic cover, 62 is a substrate for a reflector (made of milky white polycarbonate), 63 is a high-intensity reflective sheet, and is integrally formed by an outer trim 64. Has been

[0006]

However, in this prior example, since a surface-emitting EL (electroluminescence) light-emitting element for surface light emission is used as the surface light-emitting element for a sign character such as "stop", uniform surface light emission is obtained. Although there is no problem in the above point, the surface-emitting EL luminous body has low brightness and a short life of about two years, and thus has problems such as visibility and necessity of replacement.

As shown in FIG. 7 (c), a transparent acrylic cover 61 and a reflector substrate (made of milky white polycarbonate) 62 are provided on the light emitting diode 52.
In addition, because of the presence of the high-brightness reflection sheet 63, light is scattered on the reflector substrate, and the outline of the light from the light-emitting and flashing light-emitting diodes becomes unclear, resulting in a problem of reduced visibility.

[0008]

According to a first aspect of the present invention, there is provided a light emitting signboard having a plurality of light emitting diode lamps for a surface light source, and the light from the plurality of light emitting diode lamps for a surface light source is transmitted to a light guide plate. The light guide plate serves as a surface light source.

Further, the light-emitting sign board according to the second aspect of the present invention is characterized in that a plurality of light-emitting diode lamps for a surface light source are arranged on the side surface of the light guide plate.

[0010] In a third aspect of the present invention, there is provided a light-emitting sign board, wherein a plurality of light-emitting diode lamps for a surface light source are provided only on one side of the light guide plate.

[0011] Further, the light emitting sign board according to claim 4 of the present invention comprises a plurality of light emitting diode lamps for a surface light source, a light guide plate,
It has a spot display light emitting diode lamp, a transparent plate and a translucent high-intensity reflective sheet, a through hole is provided in the light guide plate, and a spot display light emitting diode lamp is inserted and arranged in the through hole. Is what you do.

Further, in the light-emitting sign board according to a fifth aspect of the present invention, the light-transmitting high-intensity reflective sheet is provided on the transparent plate, and the light-transmitting high-intensity reflective sheet corresponds to the spot display light-emitting diode lamp. An opening is provided in the high-luminance reflective sheet.

Further, in the light emitting sign board according to a sixth aspect of the present invention, at least a part of a display character or a pattern portion of the light emitting sign board is constituted by a non-translucent high-brightness reflective sheet. Is what you do.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 6 are views showing a light-emitting sign board according to an embodiment of the present invention. FIG. 1 (a)
FIG. 1B is a front view of a light-emitting sign plate, FIG. 1B is a schematic cross-sectional view of the light-emitting sign plate, and FIG. 2A is an explanatory diagram in which an upper right portion of the light-emitting sign plate of FIG. FIG.
It is a partial schematic sectional view of (a).

In FIG. 2 (b), the main body 10 of the light emitting signboard is composed of a plurality of light emitting diode lamps 11 for surface light sources, light emitting diode lamps 12 for spot display, a light guide plate 13, and the like. I do. As the surface light source of the light emitting type sign board body 10, the light of the plurality of light emitting diode lamps 11 for the surface light source mounted on the printed circuit board 14 is guided to the light guide plate 13, and becomes a surface light source from the light guide plate 13. In order to increase the light utilization efficiency, a light diffusing element (not shown, see FIG. 5) for bending light toward the front is printed on the back surface of the light guide plate, and a back reflector 15 is provided below it. Light serving as a surface light source in the light guide plate 13 is emitted to the front, passes through a transparent plate 16 made of a material such as polycarbonate and a translucent high-brightness reflection sheet 17, and illuminates the front surface of the light-emitting sign plate. . Also, the translucent high-brightness reflection sheet 17
There is a non-transparent high-brightness reflective sheet 18 provided with a light-shielding means, and at least a part of the display characters or pattern portions of the light-emitting sign board is constituted by the non-transparent high-brightness reflective sheet. .

The spot display light emitting diode lamp 12 is mounted on a printed circuit board 19 and inserted into a through hole 20 of the light guide plate 13. If necessary, a spot display light emitting diode lamp 12 may be provided on the surface of the through hole 20.
A surface reflection member may be provided so that the light does not leak to the light guide plate 13. The light of the spot display light emitting diode lamp 12 is emitted to the front, passes through the transparent plate 16,
Spot lighting is applied to the front of the light-emitting sign board. In this case, the translucent high-brightness reflection sheet 17 has a configuration of an opening 21 that is hollowed out. Since this portion does not have the translucent high-brightness reflection sheet 17, light is radiated without being scattered or attenuated by the translucent high-brightness reflection sheet, thereby improving the visibility of the light-emitting sign board from a distance. Has made. Also,
Reference numeral 22 denotes a frame of the light-emitting sign board. The through hole 20 is for securing an installation space for the spot display light emitting diode lamp 12, and may be a cutout portion or a hole that does not penetrate, instead of the through hole. With such a configuration, the surface light emission and the spot light emission of the light guide plate can be integrally emitted, so that the visibility of the sign is improved.
From another point of view, the size of the light-emitting sign board can be reduced or made thinner than when the spot display light-emitting diode lamp 12 is separately mounted.

In FIG. 2A, a main body 10 of a light-emitting sign board includes a plurality of light-emitting diode lamps 11 for surface light sources, light-emitting diode lamps 12 for spot display, a light guide plate 13 (shown by dotted lines), a printed circuit board 14, and a transparent board. Light-emitting high-intensity reflective sheet 17, non-light-transmitting high-intensity reflective sheet 18, through-hole 20,
It is composed of an opening 21 and the like. The plurality of light emitting diode lamps 11 for a surface light source are arranged around the inverted triangular light guide plate 13 so as to obtain uniform surface light emission.
In addition to performing normal spot display, the spot display light-emitting diode lamp 12 performs blinking light emission as needed to provide a display method for calling attention.

Further, it is also possible to use another color such as a red light emission color of the plurality of surface light emitting diode lamps 11 and an orange light emission color of the spot display light emitting diode lamps 12, for example. In addition, even when the same red color is used, a light emitting diode lamp with ultra-high brightness can be used as the light emitting diode lamp 12 for spot display. Further, a plurality of light emitting diode lamps 11 for a surface light source having a wide light emission angle, for example, about 10 to 60 degrees are generally used.

FIG. 1A is a front view of a light-emitting sign board, and FIG.
(B) is a schematic sectional view of a light emitting type sign board. In FIG. 1B, the main body 10 of the light-emitting marker plate includes a plurality of light-emitting diode lamps 11 for surface light sources, light-emitting diode lamps 12 for spot display, a light guide plate 13, a transparent plate 16, a translucent high-intensity reflective sheet 17, The configuration of the opening 21 is as described in detail in FIG. 2B.

Next, FIG. 1 is a front view of the light-emitting sign board.
In (a), the main body 10 of the light-emitting sign board includes a light-emitting diode lamp 12 for spot display, a light-transmitting high-brightness reflection sheet 17, a non-light-transmitting high-brightness reflection sheet 18, an opening 21, and a display such as "stop". It is composed of characters or pattern portions 23 and the like. The display color is determined by selecting a plurality of light emitting diode lamps 11 for a surface light source.
The translucent high-brightness reflective sheet 17 is red, the non-translucent high-brightness reflective sheet 18 is white, and the display characters or pattern portions 23 such as "stop" are white. The non-translucent high-intensity reflective sheet 18 and the display characters or pattern portions 23 such as "stop" are non-transparent and reflect light from the surface to exhibit white or the like. Further, at least a part of the display characters or the pattern portions 23 of the light-emitting sign board is constituted by a non-translucent high-brightness reflection sheet. In addition to the normal spot display, the spot display light-emitting diode lamp 12 flashes and emits light as necessary to call attention.

When a plurality of light-emitting diode lamps 11 for a surface light source are used as a multicolor or white light source by combining red, green, and blue light-emitting diode lamps, the main body 10 of the light-emitting sign board is used. It is not necessary to form the display character or pattern portion 23 such as "stop" with the non-light-transmitting high-brightness reflection sheet 18.

By forming the display character or pattern portion 23 with the non-light-transmitting high-brightness reflection sheet 18,
Even if the entire light guide plate 13 emits red light, characters and patterns can be clearly recognized. Further, it goes without saying that the non-light-transmitting high-brightness reflection sheet 18 may be attached to only the character pattern portion on the light-transmitting high-brightness reflection sheet 17.

Next, how the light from the plurality of light emitting diode lamps 11 for the surface light source, which are the surface light sources of the light emitting type sign board body 10, is converted into the surface light source by the light guide plate 13 will be described with reference to FIG. In FIG. 3, light from a plurality of light emitting diode lamps 11 for surface light sources mounted on a printed circuit board 14 is guided to a light guide plate 13, and a light diffusing element 24 printed on the back surface of the light guide plate 13 causes the light of the light emitting diode lamp to be reduced. The light is emitted toward the front of the light guide plate 13. Further, the light guide plate 13
A back reflector 15 is provided on the back side of the light guide plate 13 to emit light from the light emitting diode lamp toward the front of the light guide plate 13.

Next, the arrangement of a plurality of light emitting diode lamps 11 for a surface light source disposed around the light guide plate 13 will be described with reference to FIG. FIG. 4A is a diagram showing a case where a plurality of light emitting diode lamps for a surface light source are arranged on only one side surface of a light guide plate, and FIG. It is a figure at the time of disposing on the side surface (all side surfaces). 4A, reference numeral 11 denotes a plurality of light emitting diode lamps for a surface light source, 13 denotes a light guide plate, 14 denotes a printed circuit board, 20 denotes a through hole, and 25 denotes a plurality of light emitting diode lamps for a surface light source. This is a side reflection sheet provided around the light guide plate 13 which is not provided. By arranging the side reflection sheet 25, it is possible to improve the efficiency of emitting light to the front surface and to improve the uniformity of the surface light source of the light-emitting sign plate main body 10.

In FIG. 4B, reference numeral 11 denotes a plurality of light emitting diode lamps for a surface light source, 13 denotes a light guide plate, 14 denotes a printed circuit board, and 20 denotes a through hole. By arranging the light on the three side surfaces (all side surfaces), it is possible to obtain a uniform and high-luminance surface light source of the light-emitting sign plate body 10.

Further, in the case of the embodiment of the present invention shown in FIG. 4, the case where a plurality of light emitting diode lamps 11 for a surface light source are arranged on the side surface of the light guide plate 13 has been described. It goes without saying that the diode lamp 11 may be of a transmission type in which a light guide plate is provided.

Next, the pattern of the light diffusing element 24 printed on the back surface of the light guide plate 13 will be described with reference to FIG. FIG. 5 shows an example of a pattern of the light diffusing element 24 corresponding to a case where the plurality of light emitting diode lamps for a surface light source of FIG. 4A are arranged only on one side of the light guide plate. ) Is a light diffusing element 24 constituted by a circular pattern (24a).
(B) is a light diffusing element 24 configured by a rectangular pattern (24b).

Next, the translucent high-brightness reflection sheet 17 will be described with reference to FIG. In FIG. 6, the translucent high-brightness reflection sheet 17 includes a prism lens type cube corner lens 26 made of a transparent plastic material, a transparent plastic film 27 on an upper surface thereof, and an adhesive layer 28 on a lower surface. I have. The cube corner lens 26 retroreflects light incident from the surface and transmits light (light from the light guide plate 13 of the light of the plurality of light emitting diode lamps 11 for surface light sources) incident from the adhesive layer 28 on the lower surface. It also has the effect of doing. The retroreflection referred to here means that light emitted from a light source such as a headlamp of an automobile is reflected toward an original light source. The non-light-transmitting high-brightness reflection sheet 18 is provided with glass beads instead of the cube corner lenses 26, acts only to retroreflect light from the front surface, and has an adhesive layer 28 on the lower surface. There is no function of transmitting light incident from the side (light from the light guide plate 13 of light of the plurality of surface light source light emitting diode lamps 11).

[0029]

As described above, according to the light emitting sign board of the first aspect of the present invention, the light emitting sign board has a plurality of light emitting diode lamps for the surface light source, and the light of the light emitting diode lamp for the surface light source is transmitted to the light guide plate. And the light guide plate is used as a surface light source. The light source is brighter and the life of the light source is longer than when a conventional fluorescent light source of a tubular light source or an EL panel of a surface light source is used. , The maintenance opportunity can be reduced. In addition, since the light guide plate is used, light emission unevenness can be reduced.

According to a second aspect of the present invention, a plurality of light emitting diode lamps for a surface light source are provided on a side surface of a light guide plate, so that a uniform and high light emitting diode lamp is provided. It is possible to obtain a surface light source of a light emitting type sign board body with high brightness.

According to a third aspect of the present invention, a plurality of light emitting diode lamps for a surface light source are provided only on one side of a light guide plate. As a result, it is possible to obtain a high-brightness surface light source of the light-emitting sign plate main body, and to obtain a light-emitting sign plate with low power consumption.

Further, according to the light emitting sign board of the fourth aspect of the present invention, a plurality of light emitting diode lamps for a surface light source, a light guide plate, a light emitting diode lamp for spot display, a transparent plate, and a translucent high-brightness reflective sheet. Wherein the light guide plate is provided with a through hole, and a spot display light emitting diode lamp is inserted and disposed in the through hole to reduce the size or thickness of the self-luminous sign. be able to. Further, since the plurality of light emitting diode lamps for surface light sources and the light emitting diode lamps for spot display are both semiconductor diodes, the lighting circuit can be shared.

Further, according to the light-emitting sign board of the fifth aspect of the present invention, the light-transmitting high-intensity reflective sheet is provided on the transparent plate, and corresponds to the light-emitting diode lamp for spot display. The light-transmitting high-intensity reflective sheet is provided with an opening, which can reduce scattering or attenuation of light emitted from the light emitting diode lamp for spot display, and can be used in a distant place of the light-emitting sign board. Can be improved.

Furthermore, according to the light emitting sign board of the sixth aspect of the present invention, at least a part of the display characters or pattern portions of the light emitting sign board is constituted by a non-translucent high-brightness reflective sheet. This is a feature, and the visibility of a display character such as "stop" or a pattern partial character can be improved.

[Brief description of the drawings]

FIG. 1 is a drawing relating to a light-emitting sign plate according to an embodiment of the present invention, wherein (a) is a front view of the light-emitting sign plate and (b) is a schematic cross-sectional view of the light-emitting sign plate. .

FIG. 2 is an enlarged view of the upper right part of the light emitting sign board of FIG. 1 in the light emitting sign board according to one embodiment of the present invention. It is explanatory drawing which expanded the part, and (b) is a schematic sectional drawing of the side surface of an enlarged part.

FIG. 3 is a view related to a light-emitting marker plate according to an embodiment of the present invention, and shows a surface of a plurality of light-emitting diode lamps 11 for surface light sources serving as surface light sources of a light-emitting marker plate body 10 by a light guide plate 13; FIG. 3 is a diagram illustrating a state of conversion into a light source.

FIG. 4 is a diagram related to a light-emitting sign plate according to an embodiment of the present invention, and is a diagram illustrating an arrangement of a plurality of light-emitting diode lamps 11 for a surface light source disposed around a light guide plate 13; a) is a diagram in which a plurality of light emitting diode lamps for a surface light source are arranged on only one side surface of a light guide plate,
(B) is a diagram in the case where a plurality of light emitting diode lamps for a surface light source are arranged on three side surfaces (all side surfaces) of a light guide plate.

FIG. 5 is an explanatory view of a pattern of a light diffusing element 24 printed on the back surface of a light guide plate 13 of a light emitting signboard according to an embodiment of the present invention. Those composed of patterns (24
It is a figure of (a), and (b) is a figure of (24b) which constituted light diffusion element 24 by a rectangular pattern.

FIG. 6 is an explanatory diagram of a light-transmitting high-brightness reflective sheet 17 of a light-emitting sign plate according to an embodiment of the present invention.

FIG. 7 is a view showing a conventional light-emitting sign board, and FIG.
Is a front view thereof, (b) is a side view thereof,
(C) is an exploded configuration diagram of the marker portion main body.

[Explanation of symbols]

REFERENCE SIGNS LIST 10 Main body of light-emitting sign board 11 Light-emitting diode lamps for plural surface light sources 12 Light-emitting diode lamps for spot display 13 Light guide plate 14 Printed circuit board 15 Back reflector 16 Transparent plate 17 Translucent high-luminance reflective sheet 18 Non-translucent high Luminance reflection sheet 19 Printed circuit board 20 Through hole 21 Opening 22 Frame of light emitting signboard 23 Displayed characters or patterns such as "stop" 24 Light diffusing element printed on the back surface of light guide plate 25 Periphery of light guide plate 13 Reflective sheet for side surface to be disposed on 26 Prism lens type cube corner lens made of transparent plastic material 27 Transparent plastic film 28 Adhesive layer

Claims (6)

[Claims] 1. A light-emitting sign board comprising a plurality of light emitting diode lamps for a surface light source, wherein light from the light emitting diode lamps for a surface light source is guided to a light guide plate, and the light guide plate serves as a surface light source. 2. The light-emitting sign board according to claim 1, wherein
A light-emitting sign board, wherein a plurality of light-emitting diode lamps for a surface light source are arranged on a side surface of a light guide plate. 3. The luminescent signboard according to claim 2, wherein
A light-emitting sign board, wherein a plurality of light-emitting diode lamps for a surface light source are arranged only on one side of a light guide plate. 4. The luminescent signboard according to claim 2, wherein
It has a plurality of light emitting diode lamps for a surface light source, a light guide plate, a light emitting diode lamp for spot display, a transparent plate and a translucent high-intensity reflective sheet, a through hole is provided in the light guide plate, and a light emission for spot display is provided in the through hole. A light-emitting sign board having a diode lamp inserted therein. 5. The luminous sign board according to claim 4, wherein
Disposing the translucent high-brightness reflective sheet on the transparent plate,
And a light-transmitting high-intensity reflective sheet corresponding to the spot display light-emitting diode lamp, wherein an opening is provided. 6. The luminescent signboard according to claim 4, wherein
A light-emitting sign plate, wherein at least a part of a display character or a pattern portion of the light-emitting sign plate is formed of a non-translucent high-brightness reflective sheet.