JP2006125019A - Light emitting display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light emitting display device capable of reducing the number of used light emitting diodes and preventing dots for displaying character information from becoming coarse even if an interval of arrangement is made wide. <P>SOLUTION: A light collecting device provided with a reflection part 3 for reflecting light radiated from a plurality of shell type light emitting diodes 2 toward a front face side of a display base 5 and a convex lens part 4 for letting light from the shell type light emitting diodes 2 pass through and releasing the light onto the front face side of the display base 5 is provided to use the light radiated by the plurality of shell type light emitting diodes 2 in display of information such as character, figure, symbol, etc. without causing loss substantially. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a self-luminous display device that is installed on a road shoulder, a median strip, or the like, and allows a road user to recognize the state of the road by providing information to the road user.

  2. Description of the Related Art Conventionally, self-luminous display devices installed on road shoulders, median strips, and the like have been known that use bullet-type light emitting diodes as their light sources. A bullet-type light emitting diode is suitable for a self-luminous display device installed on a road because it has a long light emission life and requires less maintenance. For example, in Patent Document 1, a bullet-type light emitting diode is used as one display dot, a display surface in which a plurality of display dots are arranged in a matrix is formed, and a bullet-type light emitting diode at a position corresponding to the display content is selected. A self-luminous display device that displays information on a display surface is disclosed.

JP-A-63-284598

  By the way, since the light emitted forward from the display surface of the bullet-type light emitting diode is generally only 1/5 to 1/10 of the total luminous flux, the self-luminous display described in Patent Document 1 is used. In the device, most of the light emitted from the bullet-type light emitting diode is emitted to the side, and is lost light that does not contribute to the visual recognition of the display information of the self-luminous display device. Therefore, since the visibility of information display of the self-luminous display device is improved by extremely reducing the interval at which the bullet-type light emitting diodes are arranged on the display surface, as described above, when arranged in a matrix, The number of bullet-type light-emitting diodes to be used increases, the material cost of the bullet-type light-emitting diodes increases, the man-hour for mounting the bullet-type light-emitting diodes on the display surface, and the power consumption to make the bullet-type light-emitting diodes emit light It was. Furthermore, since it is necessary to display information by controlling a large number of mounted light emitting diodes, the control system is complicated.

  The present invention has been made to solve the above-described problems. The light emitting area per bullet light emitting diode is increased so that the character dots representing character information and the like are not roughened, and the arrangement interval is widened. By doing so, the present invention intends to provide a self-luminous display device in which the number of use of bullet-type light emitting diodes is reduced.

  In order to achieve the above object, the present invention is configured as follows. That is, a self-luminous display device according to the present invention is a self-luminous display device configured to display information such as characters, figures, symbols and the like on a display substrate by a plurality of bullet-type light emitting diodes. A light emitting diode and a light collector for condensing the light emitted from the bullet light emitting diode and emitting the light to the front side of the display substrate. The light collector receives light from the bullet light emitting diode. A reflection portion that reflects the light toward the front side of the display substrate, and a convex lens portion that transmits light from the bullet-type light emitting diode and emits the light to the front side of the display substrate. Is.

  According to the present invention, in addition to the above-described configuration, the concentrator is disposed for each bullet-type light emitting diode, and a hole into which the bullet-type light-emitting diode can be inserted is formed at the apex portion so as to have a substantially conical shape. The reflection part having the protruding wall body is inserted in a direction extending from the base of the bullet-type light emitting diode to the tip direction, and the convex lens part having a larger area than the circular cross section of the bullet-type light emitting diode is attached to the tip of the reflection part. The bullet-type light emitting diode is included by the reflecting portion and the convex lens portion.

  The self-luminous display device according to the present invention is a self-luminous display device configured to display information such as characters, figures, symbols, and the like on a display substrate by a plurality of bullet-type light emitting diodes. A light emitting diode and a light collector for condensing the light emitted from the bullet light emitting diode and emitting the light to the front side of the display substrate. The light collector receives light from the bullet light emitting diode. Since it has a reflection part that reflects the light toward the front side of the display substrate and a convex lens part that transmits the light from the bullet-type light emitting diode and emits the light to the front side of the display board, Since the light emitted from the side of the light emitting diode can be reflected by the reflecting portion and directed to the front side of the display substrate, the light emitted from the bullet-type light emitting diode can be used for display of character information with almost no loss. .

  Further, the concentrator is disposed for each of the bullet-type light emitting diodes, and a reflecting portion having a wall that protrudes in a substantially conical shape with a hole into which the bullet-type light emitting diode can be inserted at the apex portion. Inserted in a direction spreading from the root of the bullet-type light emitting diode to the tip direction, a convex lens part having a larger area than the circular cross section of the bullet-type light emitting diode is attached to the tip of the reflective part, and the bullet-type light emitting diode is formed by the reflective part and the convex lens part. , The convex lens and the bullet-type light emitting diode can be easily positioned by the reflecting portion. Therefore, the angle of the light emitted from the bullet-shaped light-emitting diode can be made as designed by the convex lens, and the self-light emission The visibility of the display device can be made desirable, and the area of light emitted to the front side of the display substrate for each bullet-type light emitting diode can be increased. Since it is, it is possible to reduce the number of bullet type light emitting diode disposed on the display substrate of the same area. Thereby, the light emission control of the bullet-type light emitting diode is facilitated, and the power consumption of the bullet-type light emitting diode can be reduced, so that the amount of heat generation is suppressed and the life of the bullet-type light emitting diode can be extended. Furthermore, the power consumption of the bullet-type light emitting diode can be reduced, so that, for example, when a solar cell that receives sunlight and generates power is used as a power source of the self-luminous display device, the capacity of the solar cell and the generated electricity are stored. The capacity of the power storage device to be reduced can be reduced.

BEST MODE FOR CARRYING OUT THE INVENTION The best embodiment according to the present invention will be specifically described below with reference to the drawings.
FIG. 1 shows an embodiment of a self-luminous display device according to the present invention, which will be described with reference to FIGS. 1 is a schematic front view of the self-luminous display device 10, FIG. 2 is an enlarged perspective view of a range A in FIG. 1, FIG. 3 is a partial enlarged sectional view of FIG. It is an expanded sectional view.

  The self-luminous display device 10 is installed in a toll booth or a mountain road on an expressway, and is for displaying the outside air temperature. The self-light-emitting display device 10 is configured to display the measured number of the outside air temperature, and to display the number by the light of the bullet-type light emitting diode 2 that emits light among the plurality of bullet-type light-emitting diodes 2 arranged in parallel. It has become. The self-luminous display device 10 includes a display substrate 5 that displays character information (numeric information), a plurality of bullet-type light-emitting diodes 2 that are arranged to display numbers on the display substrate 5, and each of the bullet-type light-emitting diodes 2. Concentrator 1 arranged, a control unit (not shown) for simultaneously displaying a plurality of bullet-type light emitting diodes 2 to emit light, and a control panel which is a box housing the control unit 11, a front plate 6 constituting the control panel 11 and positioned on the front side of the display substrate 5, and a road fixing portion 12 for fixing the control panel 11 to the road.

  The bullet-type light emitting diode 2 includes a semicircular curved surface portion 2a positioned on the front side of the display substrate 5 as a light emitting portion, a substantially cylindrical side surface portion 2b positioned on the side, and a substantially circular shape in which the light emitting portion is disposed. It is comprised by the base part 2c.

  Reference numeral 3 denotes a reflecting portion that constitutes the light collector 1 and is provided to reflect light emitted laterally from the side surface 2 b of the bullet-type light emitting diode 2 and direct it toward the front side of the display substrate 5. . The rear cylindrical portion 3a located on the back surface side of the display substrate 5 of the reflecting portion 3, the front cylindrical portion 3b located on the front surface side of the display substrate 5, and the substantially cylindrical shape protruding from the rear cylindrical portion 3a are connected to the front cylindrical portion 3b. It is comprised from the wall 3c. The inner diameter of the rear cylindrical portion 3a is a size that comes into contact with the side surface portion 2b of the bullet-type light emitting diode 2, and a position where the rear end surface of the rear cylindrical portion 3a and the base portion 2c of the bullet-type light emitting diode 2 come into contact with each other. Thus, the bullet-type light emitting diode 2 is arranged with a predetermined distance from the convex lens portion 4.

  Reference numeral 4 denotes a convex lens part constituting the condenser 1, and an outer peripheral part 4 a attached to the inner periphery of the front cylindrical part 3 b of the reflecting part 3, and light emitted from the bullet-type light emitting diode 2 is displayed on the display substrate 5. And a convex lens 4b that is transmitted to the front side of the lens. The cross-sectional shape of the convex lens portion 4 is aspherical, and the light from the bullet-type light emitting diode 2 is emitted to the front side of the display substrate 5 as parallel light by optical design so that the desired light is refracted depending on the application. Or can be emitted as diffused light to the front side of the display substrate 5, or the light emission direction can be freely set. When the size of one character representing character information is 300 mm to 350 mm square, it is preferable that the diameter of the convex lens portion where the character dots are not rough is 8 mm to 15 mm. Further, a convex lens that diffuses at least 15 ° to the left and right with respect to the front surface of the self light emitting display device 10 is preferably used so that the displayed character information can be easily seen even when the self light emitting display device 10 is viewed from an oblique direction. Is good.

  The concentrator 1 collects the light emitted from the bullet-type light emitting diode 2 and emits it to the front side of the display substrate 5. As shown in FIGS. 2 and 3, the concentrator 1 has a shell-type light emitting diode 2 inserted from the curved surface portion 2 a to the rear cylindrical portion 3 a of the reflecting portion 3, and the outer peripheral portion 4 a of the convex lens portion 4 is connected to the reflecting portion 3. Is attached to the front cylindrical portion 3b.

  The attachment method of the reflection part 3 and the convex lens part 4 may be bonded using an adhesive, or a hooking part is provided inside the front cylindrical part 3b of the reflection part 3 so that the convex lens part 4 is fitted. May be.

  When the bullet-type light emitting diode 2 emits light, light is emitted from the front plate 6 as shown in FIG. The light is emitted from a larger area than the light emitted directly from the bullet-type light emitting diode 2, and at the reflecting portion 3 without losing the light emitted to the side of the bullet-type light emitting diode 2. The light emission brightness can be increased by reflecting the light toward the front side of the display substrate 5. Accordingly, it is possible to reduce the amount of use of the bullet-type light emitting diode 2, thereby reducing the man-hour and cost required for mounting the bullet-type light-emitting diode 2, and further, the power consumed by the self-luminous display device 10. Therefore, when a solar cell that generates power using sunlight is used as the power source, the capacity and the capacity of the battery used for power storage can be reduced. Conversely, if the power consumed by the self-luminous display device 10 is used to the same extent as when light is directly emitted from the bullet-type light emitting diode 2, light emitted to the side of the bullet-type light emitting diode 2 is lost. Since it can be reflected by the reflecting portion 3 and directed toward the front side of the display substrate 5, the visibility of the self-luminous display device 10 to road users can be improved.

The front plate 6 positioned at the forefront of the self-luminous display device 10 is provided to emit the light collected by the light collector 1 and to protect the light collector 1 from wind and rain, flying sand, and the like. It is made of a transparent material. The front plate 6 is not particularly limited as long as it is transparent, but a polycarbonate resin resistant to impacts such as flying sand and flying stones is preferably used, and acrylic resin, tempered glass, and the like can also be used. Further, by making the surface of the front plate 6 located on the opposite side of the bullet-type light emitting diode 2 into a fine rough surface, the light irradiated on the front plate 6 from the outside is scattered, and sunlight or the like from outside Since light can be prevented from being reflected by the front plate 6, information such as characters, figures, symbols and the like displayed on the display substrate 5 can be seen well, which is preferable.
Further, since the front plate 6 is colored and transparent, the amount of light transmitted from the outside to the display substrate 5 can be reduced. Therefore, the luminance of the display substrate surface and the light emitted from the bullet-type light emitting diode 2 can be reduced. The brightness difference can be increased. Therefore, it is preferable because the visibility of the self-luminous display device 10 can be improved. For coloring the front plate 6, it is preferable that the light from the bullet-type light-emitting diode 2 has the same color as the light of the bullet-type light-emitting diode 2 that can pass through the front plate 6.

  The reflecting portion 3 is formed by injection molding using a synthetic resin material such as ABS or AAS, and a large number are formed by one molding. The color is preferably white or silver which appears brighter than other colors. Also, as shown in FIG. 4, by forming the reflecting portion 3 in a shape close to a substantially conical outer peripheral surface, the light emitted from the side of the bullet-type light emitting diode 2 is reflected by the reflecting portion 3 and is a convex lens. Since it is directed in the direction of the portion 4, it may be formed using a transparent synthetic resin material.

  The convex lens portion 4 needs to efficiently transmit the light from the bullet-type light emitting diode 2 and is therefore preferably molded using an acrylic synthetic resin material that has high transmittance and is easily formed. Any transparent material such as a transparent resin such as polyolefin resin or glass may be used.

  Next, the positional relationship between the front plate 6 and the collector 1 described above will be described. As shown in FIG. 3, a gap 7 about the thickness of the front plate 6 is provided between the front plate 6 and the collector 1. By providing this gap 7, even if the front plate 6 is bent toward the collector 1 due to wind, stepping stones, etc., the front plate 6 does not contact the collector 1. It is preferable that a load is not applied to the vessel 1 and that the light collector 1 is bent and the emitted light is prevented from deviating.

It is a schematic front view which shows the Example of the self-light-emitting display apparatus concerning this invention. It is an expansion perspective view of the range A of FIG. FIG. 3 is a partially enlarged sectional view of FIG. 2. FIG. 3 is an enlarged cross-sectional view of the condenser 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Condenser 2 Bullet-type light emitting diode 3 Reflection part 4 Convex lens part 6 Front plate 10 Self-light-emitting display apparatus

Claims (2)

A self-luminous display device configured to display information such as characters, figures and symbols on a display board by a plurality of bullet-type light emitting diodes, and is emitted from the plurality of bullet-type light emitting diodes and the bullet-type light emitting diodes. And collecting the emitted light to the front side of the display substrate. The collector receives light from the bullet-type light emitting diode and reflects the light toward the front side of the display substrate. A self-luminous display device, comprising: a reflecting portion that transmits light from a bullet-type light emitting diode, and a convex lens portion that emits the light to the front side of the display substrate. The concentrator is disposed for each of the bullet-type light emitting diodes, and a reflection portion having a wall that protrudes in a substantially conical shape with a hole into which the bullet-type light emitting diode can be inserted at the apex portion. Inserted in a direction spreading from the root of the bullet-type light emitting diode to the tip direction, a convex lens part having a larger area than the circular cross section of the bullet-type light emitting diode is attached to the tip of the reflective part, and the bullet-type light emitting diode is formed by the reflective part and the convex lens part. The self-luminous display device according to claim 1, wherein the self-luminous display device is included.

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