JP2013079498A - Backlight measure road sign board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that when the sun is located nearby an extension of a road sign board from a viewing point during reading of the road sign board on a vehicle during a travel, a sign board surface becomes dark owing to backlight and readability is too bad to maintain traffic safety, and uniform characters cannot be obtained at positions of ribs and a column by a method of improving the readability by making a hole and a slit in the center part of a character on the sign board and taking light in.SOLUTION: A photovoltaic power generation plate is fitted to the back of the sign board and electric power is generated. LEDs fitted to the signboard plate surface are made to emit light with the generated electric power to improve the visibility. The LEDs are fitted tracing the center position of white reflective sheet of characters and marks of the sign board to improve the readability. The photovoltaic power generation plate is set in the opposite direction from the sign board. A large current flows with intense backlight and the sign board plate surface illuminates intensely. A small current flows with weak backlight and weak illumination is obtained, so the LEDs automatically illuminate according to the intensity of the backlight to improve the visibility.

Description

本発明は、道路標識板が逆光になった時に視認性を上げる装置。   The present invention is an apparatus for improving visibility when a road sign board is backlit.

LEDの発光効率が上がり、少ない電力で強い光が取り出せるようになった。この事は比較的小さな太陽光発電板で発電した電力でも、多数のLEDを点灯することが出来、それが表示物の照度不足を補助することが出来るようになった。   The luminous efficiency of the LED has increased, and it has become possible to extract strong light with less power. This means that even with the power generated by a relatively small photovoltaic power generation board, it is possible to turn on a large number of LEDs, which can assist in the lack of illuminance of the display.

LEDの照射角度を15度程度に絞り、遠方まで光が届くようになった。この事で遠方からの視認性が上がり道路標識などへの活用が広がった。LEDを多数使用して、文字やマークを表示すると、それが遠方から明確に分かり、道路標識には最適な技術となる。   The illumination angle of the LED is reduced to about 15 degrees, and light can reach far away. As a result, visibility from a distance has increased, and the use of road signs has expanded. If you use a lot of LEDs to display characters and marks, you can clearly see them from a distance, which is the best technique for road signs.

反射シートとLEDの組み合わせは逆光対策標識板に最適である。逆光時の太陽光線で発電して、それがLEDを点灯させ視認性を上げる。逆光が強ければ強いほどLEDが強く発光して標識板の視認性を上げる、太陽光が順光になるとLEDはほとんど発光しないが、標識板の視認性は高い。夜間はLEDは全く発光しないが、反射シートへの車のヘッドライトで反射光が発生して視認性を上げる。即ち、必要な時必要な光が発生して目的を果たすようになる。   The combination of the reflective sheet and LED is the best for the backlighting sign board. Electricity is generated by sunlight in the backlight, which turns on the LED and improves visibility. The stronger the backlight, the stronger the LED emits and raises the visibility of the sign board. The LED emits little light when the sun goes forward, but the visibility of the sign board is high. At night, the LED does not emit light at all, but the reflected light is generated by the headlight of the car to the reflective sheet, improving visibility. That is, the necessary light is generated when necessary and the purpose is achieved.

反射シートにLEDを埋め込む時、その面積はLEDの直径５ｍｍが削除される、約４０ｃｍ^２に1個埋め込んだ場合その比率は0.4％であり、順光時の視認性や夜間の反射シートによる視認性を妨げることなく、逆光の時のみ発光してその機能を発揮する。 When embedding the LED to the reflective sheet, the area of LED 5mm diameter are removed, is the ratio of 0.4% when embedded one in about 40 cm ^2, visibility by the visibility or at night reflecting sheet of the forward light Without interfering with the nature, it emits light only in backlight and exhibits its function.

特願２００８−２８４０７４号公報Japanese Patent Application No. 2008-284074 特願２００２−６６９９６号公報Japanese Patent Application No. 2002-66996

車で走行中道路標識を読む上で、見る位置から標識板の延長線付近に太陽が位置すると、逆光となり標識板面が暗くなり判読性が極端に悪くなり、交通安全を維持する上で大きな課題となっている。この対策として、標識板上の文字の中心部に穴やスリットを空けて光を取り入れ判読性の向上を図る方法がある。
しかし、裏面に固定するリブや支柱の位置と重なると、穴の位置を文字と一致させることが難しい。
また、穴に差し込む太陽光にリブや支柱の影が重なる場合、均一な光の点を維持することが難しく、充分な文字やマークの判読性を上げる事が出来ない。 When reading a road sign while driving by car, if the sun is located near the extension line of the sign board from the viewing position, it will be backlit, the sign board surface will become dark and the legibility will become extremely bad, and it will be great for maintaining traffic safety It has become a challenge. As a countermeasure, there is a method of improving the legibility by introducing a light by making a hole or slit in the center of the character on the sign board.
However, it is difficult to match the position of the hole with the character when it overlaps with the position of the rib or the post fixed to the back surface.
Moreover, when the shadow of a rib or a support | pillar overlaps with the sunlight which inserts into a hole, it is difficult to maintain the point of a uniform light, and the legibility of a character and a mark cannot fully be improved.

本来標識板の基板にはアルミ板を使用し、アルミ板の表面に反射シートを貼る構成となっている。逆光対策にはアルミ板の代わりに光透過性繊維シートや透明アクリル板を使用して、背面からの太陽光が標識板面に届き、逆光時でも標識板面の判読性を上げる方法もある。
この場合でも裏面のリブや支柱の影が影響して、均一な判読性を維持することが難しい。 Originally, an aluminum plate is used as the label plate, and a reflective sheet is pasted on the surface of the aluminum plate. As a countermeasure against backlight, there is a method of using a light-transmitting fiber sheet or a transparent acrylic plate instead of an aluminum plate, so that sunlight from the back reaches the sign plate surface, and the readability of the sign plate surface is improved even in backlight.
Even in this case, it is difficult to maintain uniform legibility due to the influence of the ribs on the back surface and the shadow of the support.

標識板の背面に太陽光発電板を取り付けて発電する。発電した電力で標識板面に取り付けたLEDを発光させ、視認性を上げる。
LEDの取り付け位置は、標識板の文字やマークの白色反射シート部の中心位置をなぞるように取り付け、判読性を上げる。 A photovoltaic power generation plate is attached to the back of the sign plate to generate electricity. The generated power emits an LED attached to the surface of the sign board to improve visibility.
The LED is mounted so that it follows the center position of the white reflective sheet portion of the sign and letters on the sign board, improving readability.

LEDの取り付け方法には図２で示すように、文字箱を使用する。薄型の文字箱は標識板面に取り付ける。この箱は不点灯などの場合は箱のまま取りかえられるようにしておく。箱に表示された白色反射シートの文字やマークの中心位置にLEDを埋め込みこれを点灯させて逆光下でも標識他面の判読性を上げる。   As shown in FIG. 2, a letter box is used to attach the LED. A thin character box is attached to the sign board. If the box is not lit, leave it in the box. The LED is embedded in the center position of the letters and marks on the white reflective sheet displayed on the box, and this is turned on to improve the legibility of the other side of the sign even under backlight.

太陽光発電板の向きは、標識板の逆光になる位置を向いて固定されている。強い逆光の時は高い電流が流れ、標識板面は強く発光する。弱い逆光の時は低い電流が流れ弱い発光となる。このことは、あたかも太陽光発電板が光センサーのごとく、逆光が強い時は強く発光し、弱い逆光の時は弱い発光となる。また、逆光から順光に変わると、標識板は発光せず、通常の標識板となる。   The direction of the solar power generation plate is fixed so as to face the position where the sign plate is backlit. When the backlight is strong, a high current flows and the sign board surface emits light strongly. When the backlight is weak, a low current flows and weak light emission occurs. As if the solar power generation plate is an optical sensor, this means that light is emitted strongly when the backlight is strong, and weak light is emitted when the backlight is weak. Further, when the backlight changes to the forward light, the sign plate does not emit light and becomes a normal sign plate.

使用するLEDは白色で放射角10°から30°を使用して、長距離からの視認性を確保する。また、文字板に取り付ける時、長期間使用する上で支障が起らないよう、表面の板とLED及び基板を防水し、高い堅牢度で密着固定させる。   The LED used is white and uses a radiation angle of 10 ° to 30 ° to ensure visibility from a long distance. Also, when attaching to the dial, the surface plate, LED and board are waterproofed and fixed with high fastness so as not to hinder long-term use.

夜間は当然LEDは発光しない。通常通り表面に貼られた反射シートに車のヘッドライトが当たり反射して視認性を確保する。反射シート内に埋め込まれたLEDの面積は０．４％以下であり視認性の障害にはならない。   Naturally the LED does not emit light at night. As usual, the headlight of the car hits the reflective sheet affixed to the surface to ensure visibility. The area of the LED embedded in the reflective sheet is 0.4% or less and does not hinder visibility.

図１は、標識板、太陽光、見る人の位置の全体像Figure 1 shows the overall picture of the sign board, sunlight, and the location of the viewer 図２は、標識板と文字発光箱の位置Figure 2 shows the position of the sign board and the text light emitting box. 図３は、文字発光箱を標識板に取り付ける構造Fig. 3 shows a structure for attaching a light-emitting box to a sign board 図４は、文字発光箱Figure 4 shows a light emitting box 図５は、文字発光箱の断面図Fig. 5 is a cross-sectional view of a character luminous box 図６は、LEDの固定部断面図Figure 6 is a cross-sectional view of the LED fixing part

通常の道路標識の表示部にLEDを埋め込んだ薄い文字発光箱を取り付け、外観は通常の標識板である。標識板を見る時逆光になった時だけ標識板の文字やマークが発光して視認性を上げる。逆光時には標識板の裏面には強い太陽光が当たっており、その光で発電して標識板面でLEDが発光して視認性を上げる。太陽の位置が標識板の前面へ移動すると順光となりLEDは発光しないが標識板面は明るくなり視認性は高くなる。夜間になるとLEDは当然発光しないが、反射シートへ車のヘッドライトが当たり反射光が発生して視認性を上げる。   A thin light-emitting box with LEDs embedded in the display part of a normal road sign is attached, and the appearance is a normal sign board. Only when the signboard is backlit, the letters and marks on the signboard emit light to improve visibility. When the backlight is backlit, the back of the sign board is exposed to strong sunlight. The light is generated by that light and the LED emits light on the face of the sign board to improve visibility. When the position of the sun moves to the front of the sign board, the light becomes forward and the LED does not emit light, but the sign board surface becomes bright and visibility is enhanced. At night, the LED naturally does not emit light, but the headlight of the car hits the reflective sheet and the reflected light is generated, improving visibility.

図１は、太陽の位置、太陽光発電板、標識板、見る人の位置を表している。標識板を見る人からは標識板の後方に太陽が位置すると逆光となり標識板面の視認性が悪くなる。この時標識板面に取り付けたLEDの発光により視認性が上がる。   FIG. 1 shows the position of the sun, the photovoltaic power generation board, the sign board, and the position of the viewer. From the person who looks at the sign board, when the sun is located behind the sign board, it becomes backlit and the visibility of the sign board surface becomes worse. At this time, the visibility is improved by the light emission of the LED attached to the sign board surface.

太陽が標識板の手前に来ると順光となり標識板面は明るくなり、視認性は高くなる。この時太陽光発電板には弱い光が当たるため発電量が少なく、標識板面のLEDは発光しない。つまり、強い逆光の時のみLEDが発光して視認性を上げる。弱い逆光の時は発電量も少なく自動的にLEDの発光も弱くなるが、それなりに視認性は保たれる。   When the sun comes in front of the sign board, the light comes forward and the sign board surface becomes bright and the visibility is enhanced. At this time, the photovoltaic power generation board is exposed to weak light, so the amount of power generation is small, and the LED on the sign board does not emit light. In other words, the LED emits light only when there is strong backlight, improving visibility. When the backlight is weak, the amount of power generation is small, and the LED light emission automatically weakens, but the visibility is maintained as such.

図２は、標識板の中の逆光時に読みにくい文字部の図面である。文字部の白色反射シート部に埋め込まれたLEDが発光して、文字を表示する。逆光が強ければ強いほどLEDは強く発光するので、逆光時でも文字を読むことが出来る。   FIG. 2 is a drawing of a character portion that is difficult to read during backlighting in a sign board. The LED embedded in the white reflective sheet part of the character part emits light and displays the character. The stronger the backlight, the stronger the LED emits light, so you can read text even in backlight.

図４は、文字発光箱である。箱全体には標識板面と同じ色付き反射シートが貼ってあり、その上に文字に切り抜いた白色反射シートが貼ってある。その文字の中心線に沿って一定間隔にLEDの頭が出るように取り付ける。箱の中は配線をして全てのLEDが点灯するように取り付ける。文字発光箱は標識板に固定する。   FIG. 4 shows a character light emitting box. A reflective sheet with the same color as that of the sign board is pasted on the entire box, and a white reflective sheet cut into letters is pasted thereon. Install the LED heads at regular intervals along the center line of the letters. Install the wiring in the box so that all LEDs are lit. The character luminous box is fixed to the sign board.

図５は、文字発光箱の断面である。箱の表面板に貼られた反射シートを突き抜けるようにLEDを固定する。全てのLEDを配線でつなぎ外部の電源と接続する。箱の背面には板を設け周囲は防水性を持たせて密着する。LEDの突出し部も密着して、外部からの水やほこりを遮断する。   FIG. 5 is a cross-sectional view of the character light emitting box. The LED is fixed so as to penetrate the reflective sheet attached to the face plate of the box. Connect all LEDs with wiring and connect to an external power supply. A plate is provided on the back of the box, and the periphery is in close contact with waterproofing. The protruding part of the LED is also in close contact, blocking water and dust from the outside.

図６は、箱前面板とLEDの突出し部断面図である。前面板とLEDの防水性を持たせた密着は重要で、文字発光箱の耐久性に大きな影響を与える、道路標識は長期間使用すると同時に使用中に故障した場合簡単に補修が出来にくいので、その耐久性には最大の注意を払う必要がある。   FIG. 6 is a cross-sectional view of the protruding portion of the box front plate and the LED. Adhesion with waterproofing of the front panel and LED is important, and it has a great impact on the durability of the light emitting box, because road signs are used for a long time and at the same time it is difficult to repair easily if it breaks down during use. The utmost attention must be paid to its durability.

逆光対策表示板は道路標識以外にも多くの用途がある。例えば、案内看板や誘導表示板等。また、太陽が一定の位置に来た時からスタートする機器装置、一定の暗さからスタートする機器装置、または、太陽光がある時だけ点灯する照明機器など、発電と点灯の間に蓄電池や変換機など介在しない低コストで簡素な点灯装置などがある。   The backlighting display board has many uses other than road signs. For example, a guide signboard or a guidance display board. Also, storage devices and conversions between power generation and lighting, such as equipment that starts when the sun reaches a certain position, equipment that starts from a certain darkness, or lighting equipment that lights only when there is sunlight There is a low-cost and simple lighting device that does not involve a machine.

１ 太陽の位置（逆光）
２ 太陽の位置（逆光）
３ 太陽の位置（逆光）
４ 太陽の位置（順光）
５ 太陽の位置（順光）
６ 太陽に位置（順光）
７ 太陽光発電板
８ 標識板
９ 標識支柱
１０ 人が見る方向
１１ 文字発光箱
１２ 白色反射シート
１３ 色付き反射シート
１４ LED
１５ ボルト穴
１６ プリント基板
１７ 箱内配線
１８ 外部接続リード線
１９ 文字箱表面板
２０ 防水接着
２１ 文字箱表面板
２２ 文字箱裏面板
1 Sun position (backlight)
2 Sun position (backlight)
3 Sun position (backlight)
4 Sun position (forward light)
5 Sun position (adjacent light)
6 Position on the sun (front light)
7 Photovoltaic power generation plate 8 Marking plate 9 Marking column 10 Direction seen by person 11 Character light emitting box 12 White reflective sheet 13 Colored reflective sheet 14 LED
15 Bolt hole 16 Printed circuit board 17 In-box wiring 18 External connection lead wire 19 Character box surface plate 20 Waterproof adhesive 21 Character box surface plate 22 Character box back plate

Claims (4)

太陽光発電とLEDを組み合わせて道路標識の判読性を上げるもので、太陽光発電板の受光面とLEDの放射光面が逆向きとなり、道路標識の逆光を利用してLEDを発光させ、道路標識の判読性を上げる逆光対策道路標識板。   The combination of photovoltaic power generation and LED improves road sign readability. The light receiving surface of the photovoltaic power generation plate and the radiated light surface of the LED are opposite to each other. Backlit road sign board that improves the legibility of signs. 道路標識に表示する白色反射シートの文字やマークの中心線部にLEDを埋め込み、LEDを発光させることで文字やマークを判別出来る光の線が表示され、逆光下でも表示内容が読み取れるようにした前記1記載の逆光対策道路標識板。   The LED is embedded in the center line of the white reflective sheet characters and marks displayed on the road signs, and the light lines that can distinguish the characters and marks by displaying the LEDs are displayed, so that the display contents can be read even under backlight. The road sign board for counter light according to 1 above. 道路標識に表示する文字やマークにLEDを組み込む時、LEDの配線に必要な隙間を作る薄い箱状の配線箱を作り、その表面に反射シートを貼り、反射シートの表面にLEDの発光部が露出するように固定して光が放出するようにし、この薄型の発光箱を道路標識板面に取り付けた、前記1記載の逆光対策標識板。   When incorporating LEDs into letters and marks displayed on road signs, create a thin box-like wiring box that creates the gap necessary for LED wiring, paste a reflective sheet on the surface, and the LED light emitting part on the surface of the reflective sheet 2. The counter-light countermeasure sign board according to 1 above, wherein the thin light-emitting box is attached to a surface of a road sign board so that the light is emitted while being fixed to be exposed. 太陽光発電で起こす電気を蓄電せず、そのまま道路標識板面に取り付けたLEDを発光させ標識板の判読性を上げ、受光量が多い時と少ない時それに比例してLEDの発光量が変化する、即ち受光量に応じてLEDの発光を自動的に強弱に変化させる前記1記載の逆光対策標識板。   The electricity generated by solar power generation is not stored, but the LED mounted on the road sign board is lighted as it is to improve the legibility of the sign board, and the amount of light emitted from the LED changes in proportion to the amount of light received and when it is low. In other words, the backlight anti-labeling plate as described in 1 above, wherein the light emission of the LED is automatically changed to strong or weak according to the amount of received light.