JPH0334787Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention arranges multiple light emitting diodes and turns on or blinks the light emitting diodes to attract attention to visual guide lights, traffic signs, etc. This relates to luminescent signs.

(Prior art and problems) Conventional technology for self-luminous signs that include a plurality of light emitting diodes includes, for example, in the case of line-of-sight guide lights, the inside of a reflector that reflects light from vehicle headlights. It is known that the tips of the light emitting diodes are made to protrude from the light emitting diode and are made to blink, thereby improving visibility compared to other line-of-sight guiding lights that consist only of reflectors.

(Refer to Japanese Utility Model Application Publication No. 55-81109.) However, simply combining a light emitting diode and a reflector as in the above idea does not
Since the optical directivity of the light emitting diode is narrow, sufficient visibility cannot be obtained over a wide range, and if a large number of light emitting diodes are installed to solve this problem, the cost will increase significantly. Furthermore, in the case of road signs installed outdoors, if the light-emitting diodes are exposed to the outside, water will enter the lighting device of the self-luminous sign, leading to electrical failure and reducing its function as a highly visible sign. I had a problem when I lost it.

(Means for Solving the Problems) The present invention solves the above-mentioned drawbacks all at once, and is a self-luminous sign that effectively utilizes the lighting of light emitting diodes to improve visibility and has excellent moisture resistance. It provides: Specifically, a light emitting diode is disposed in each of a plurality of openings formed in the support member, and at least a region covering the tip of the light emitting part of the light emitting diode and the light emitting part of another adjacent light emitting diode is transparent. The above-mentioned problem is solved by providing a sign surface covered with a transparent material and a reflective layer interposed between the light-transmitting member and the supporting member to reflect a part of the light emitted from the light emitting diode. It is something to do.

(Example and operation) Hereinafter, an example in which the present invention is applied to a line-of-sight guiding light, which is a self-luminous sign, will be described based on the drawings.

FIG. 2 is a front view of the essential parts of a line-of-sight guide light, which is a self-luminous sign, and FIG. 1 is a sectional view taken along line X-X' in FIG.

In FIG. 2, the line-of-sight guiding light 1 includes a lamp 3 having a sign surface 2 formed on at least one side, and a lamp 3 having a marking surface 2 formed on at least one side.
It consists of a pole 4 that supports the

The sign surface 2 of the lamp device 3 is configured as follows. That is, a plurality of light emitting diodes 50 serving as light sources are arranged in each of a plurality of openings formed in the lamp device 3 of the support member, and at least a region covering the tip of each light emitting part 5 and other light emitting parts 5 is covered with glass. A donut plate-shaped front cover 6 made of a transparent material of a plastic lamp is covered. Here, the light emitting diode 50 is arranged in a circular shape on the front peripheral edge of the lamp device 3, and a front cover 6 is provided to reflect a part of the light emitted from the light emitting diode 50.
A reflective layer, which will be described later, is interposed between the lamp device 3 and the lamp device 3.
When the reflector 7 is provided to reflect the headlight, it is placed at a position where the light reflected from the external light by the reflector 7 does not interfere with the lighting of the light emitting diode 50.

In FIG. 1, a light emitting diode 50 supported on one side of the lamp device 3 of the line-of-sight guiding light 1 has a light emitting portion 5.
is arranged so as to protrude from inside the lamp device 3. The front cover 6 has a recess 8 into which the light emitting part 5 fits so as to be joined to the surface that supports the light emitting diode 50, and further has a recess 8 that is joined to the back side of the front cover 6, that is, the surface that supports the light emitting diode 50. The surface of the front cover 6, leaving the area of the light emitting part 5, is provided with a reflective layer 9 formed by applying white or silver paint or sealing a metal foil such as aluminum.

Further, on the surface of the front cover 6, a dome-shaped protrusion 13 made of the same material as the front cover 6 is provided in the region of the light emitting part 5.

A reflector 7 provided on the sign surface 2 that does not interfere with the lighting of the light emitting part 5 of the light emitting diode 50 is directly attached to the lamp unit 3 of the line-of-sight guiding light 1.

Inside the lamp 3, the lead terminal of the light emitting diode 50 is electrically connected to a lighting control board 10, and the lighting control board 10 is housed in a commercial power source that is a power supply, or in the lamp 3, pole 4, etc. It is electrically connected to a storage battery (not shown) such as a solar battery that stores output power, and controls the lighting of the light emitting diode 50. That is, the light emitting diode 50 can be turned on or blinked by combining well-known means such as a photo sensor and a timer mechanism, and further via a ring counter or the like depending on the surrounding brightness or darkness or a predetermined time.

Next, the operation of this embodiment will be explained using the enlarged view of the main part in FIG. In the figure, solid lines and broken line arrows indicate the light emitting part 5.
This shows the light conduction path of the turned on light.

When a current flows through the light emitting diode 50 as determined by the circuit on the control board 10, a flashing light is emitted from the chip (light emitting point) 11 of the light emitting section 5 protruding into the front cover 6. For example, the lighting light λ ₀ emitted obliquely forward travels straight through the front cover 6, and a part of the lighting light λ ₀ is transmitted outward at the surface interface of the front cover 6 (transmitted light λ′ ₁ ). The rest is reflected and the primary reflected light λ ₁ goes straight through the front cover 6 again.The primary reflected light λ ₁ is totally reflected by the reflective layer 9 provided on the back surface of the front cover 6, and becomes the totally reflected secondary reflected light λ 1. The reflected light λ ₂ travels straight through the front cover 6 again, and is transmitted (transmitted light λ' ₃ ) and reflected (tertiary reflected light λ ₃ ) at the surface interface of the front cover 6.

That is, the lighting light emitted from the chip 11 of the light emitting part 5 in all directions is diffusely reflected within the thickness of the front cover 6 that covers at least the upper part of the light emitting part 5 and the area between adjacent light emitting parts 5, and as a result, , it appears as if the front cover 6 of the sign surface 2 is emitting light over its entire surface.

FIG. 4 shows a sectional view of another embodiment of the line-of-sight guiding light, which is a self-luminous sign according to the present invention.

Note that the same parts as in FIGS. 1 and 2 are denoted by the same reference numerals.

The recess 1 is arranged in accordance with the arrangement of the light emitting diodes 50 arranged on the sign surface 2 on one side of the lamp device 3 of the line-of-sight guiding light 1.
A plurality of light emitting diodes 2 are provided, and the light emitting portion 5 of the light emitting diode 50 is accommodated in the recess 12 .

It is preferable to coat the side wall surface of the recess 12 in which the light emitting part 5 is housed with a paint having a reflective effect, since the light emitted from the light emitting part 5 can be reflected in the forward direction of the sign surface 2 without any waste.

The back side of the front cover 6 has a light emitting diode 5.
The light-emitting part 5 of 0 is flat because it does not protrude, and the above-mentioned reflective layer 9 is provided on the back surface of the front cover 6 that is joined to one side of the lamp device 3 having a recess 12 for housing the light-emitting part 5. .

This embodiment does not require complicated processing on the back surface of the front cover 6, and the same effect as described above can be obtained.

FIG. 5 shows a front view of an embodiment in which the self-luminous sign of the present invention is used as a traffic sign.

A light emitting diode 50 is arranged on the entire surface of the sign surface 22 of the traffic sign 21, and extends over the upper part of the light emitting part 25, the tip of the light emitting part 25 of the adjacent light emitting diode 50, and the light emitting part 25 of the other adjacent light emitting diode 50. A front cover 26 made of a translucent member is attached to cover the area.

The front cover 26 can be divided according to the design and characters of the traffic sign 21, a translucent colored member can be used for the front cover 26 according to the color of the traffic sign 21, and light emitting diodes 5 with different lighting colors can be used.
Use 0.

As a result, the lighting from the light emitting diode 50 is diffusely reflected within the thickness of the front cover 26, so that the traffic sign 21 appears to emit light in accordance with the design, characters, and color.

Further, for the traffic sign 21 that can transmit information only by displaying the main part of the sign surface 22, the sign surface 22 may be configured by using the light emitting diode 50 and the front cover 26 only in the main part.

(Effects of the invention) As detailed above, the self-luminous sign of the invention includes a light-emitting diode, a light-transmitting member that covers the light-emitting diode, a supporting member on which the light-emitting part of the light-emitting diode is arranged, and a light-transmitting member. Since it is equipped with a marking surface and a reflective layer interposed between them, it is possible to effectively utilize the lighting light of the light emitting diode, which has low current consumption and narrow optical directivity, and weakens the direct light from the light emitting diode compared to conventional methods. In addition, a part or the entire sign surface can be recognized as if it were emitting light, and it can function as a highly visible sign with an extremely simple configuration.

Further, by appropriately combining not only the colors of the light emitting diodes and the transparent member, but also the materials and colors of the reflective layer, it is possible to realize a wide variety of signs.

In addition, by perfecting the adhesion between the light-transmitting member and the support member using the reflective layer, it is possible to completely block moisture from entering the lamp unit, resulting in extremely high moisture resistance without electrical failure. Self-luminous signs can be provided.

Furthermore, by arranging the light-emitting portion of the light-emitting diode so as not to protrude into the opening of the support member, the light-transmitting member that covers the light-emitting diode can be made into a flat plate shape, for example, and the processing thereof can be further simplified. I can do it.

[Brief explanation of drawings]

Figures 1 and 2 show an embodiment of the line-of-sight guide light, which is a self-luminous sign of the present invention, and Figure 1 is a cross-sectional view taken along line X-X' in Figure 2; FIG. FIG. 3 is a cross-sectional view of a main part, showing a light conduction path of light emitted from a light emitting diode. Fourth
The figure is a cross-sectional view of another embodiment of the line-of-sight guiding light, which is a self-luminous sign according to the present invention. FIG. 5 shows an embodiment in which the self-luminous sign of the present invention is used as a traffic sign. 5, 25... Light emitting section, 6, 26... Front cover, 9... Reflective layer.

Claims (1)

[Scope of utility model registration request] A light-emitting diode is disposed in each of the plurality of openings formed in the support member, and at least a region covering the tip of the light-emitting part of the light-emitting diode and the light-emitting part of another adjacent light-emitting diode is covered with a light-transmitting member. 1. A self-luminous front sign comprising: a cover; and a sign surface having a reflective layer interposed between the translucent member and the supporting member to reflect a part of the light emitted from the light emitting diode.