JP2014084679A - Road sign - Google Patents

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JP2014084679A
JP2014084679A JP2012236415A JP2012236415A JP2014084679A JP 2014084679 A JP2014084679 A JP 2014084679A JP 2012236415 A JP2012236415 A JP 2012236415A JP 2012236415 A JP2012236415 A JP 2012236415A JP 2014084679 A JP2014084679 A JP 2014084679A
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light
base plate
plate
road sign
sheet
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Yoshiaki Hirano
好昭 平野
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Kowa Sangyo Co Ltd
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Kowa Sangyo Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a road sign which reduces a running cost, and becomes conspicuous by making a character and a figure be bright and distinct.SOLUTION: The road sign is formed by integrally stacking a base plate 1 that has a penetration part 2 in which a character, a figure and the like are notched, and has a high rigidity, a colored retroreflection sheet 3 that is integrally stacked on a front face of the base plate 1 and a white and translucent reflection sheet 4, on a transparent acrylic plate 5; is provided with a backing plate 20 fixed to a rear face side of the base plate 1; and has LED lighting apparatuses 6 provided at a rear position of the backing plate 20.

Description

本発明は、道路標識に関する。   The present invention relates to road signs.

従来、逆光線でも表示面に示した文字又は図形を見易くするように工夫された道路標識が提案されている（特許文献１参照）。   Conventionally, a road sign devised to make it easy to see the characters or figures shown on the display surface even with reverse rays has been proposed (see Patent Document 1).

特許第３８７５９０３号公報Japanese Patent No. 3875903

しかし、従来の道路標識は、表裏両面から光が照射された場合には、表示面のコントラストが悪くなり、白色部分の文字・図形がつぶれて標示内容を視認することができなくなっていた。
そこで、表示面の裏面側から蛍光灯で光を当てる内照式の道路標識が提案されている。しかし、この内照式の道路標識は、消費電力が多いため、ランニングコストが高く、昨今の節電要請に反するという欠点があった。また、蛍光灯を包囲して雨水や砂塵から保護するためのケーシングが必要となり、全体が大型化し重量も大きくなるため、取り扱いにくく施工上不便であった。 However, when the conventional road sign is irradiated with light from both the front and back sides, the contrast of the display surface is deteriorated, and the characters / graphics in the white portion are crushed and the contents of the sign cannot be visually recognized.
In view of this, an internally illuminated road sign has been proposed in which light is applied from the back side of the display surface with a fluorescent lamp. However, this internally illuminated road sign has a drawback in that it has high power consumption and high running cost, which is contrary to the recent power saving demand. In addition, a casing is required to surround the fluorescent lamp and protect it from rainwater and dust, and the whole is large and heavy, so that it is difficult to handle and inconvenient in construction.

そこで、本発明は、ランニングコストを低く抑え、かつ、文字・図形が明るく際立って見易い道路標識を提供することを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to provide a road sign that keeps running costs low, and that characters and figures are bright and stand out easily.

本発明に係る道路標識は、文字、図形等を切欠形成した貫通部を有する剛性の高いベース板と、該ベース板の前面に一体状に積層された有色彩の再帰性反射シートと、白色系の半透明の反射シートを一体状に透明アクリル板に積層して、ベース板の後面側に固着された裏当て板とを、備え、該裏当て板の後方位置にＬＥＤ照明器を設けたものである。   A road sign according to the present invention includes a base plate having a high rigidity having a penetrating portion in which characters, figures, and the like are notched, a colored retroreflective sheet integrally laminated on the front surface of the base plate, a white system A semitransparent reflective sheet integrally laminated on a transparent acrylic plate, and a backing plate fixed to the rear surface side of the base plate, and an LED illuminator provided at a rear position of the backing plate It is.

また、使用状態に於て、上記ベース板に前方から光が照射され上記貫通部に射し込んだ入射光が上記反射シートに当たって反射光として前方へ反射されると共に、上記裏当て板の後方から上記ＬＥＤ照明器によって光が照射され上記透明アクリル板及び上記反射シートを透過して上記貫通部から前方へ透過光として放射されるように構成されているものである。
また、上記ＬＥＤ照明器は、保持杆に固着された発光体と、該発光体を取り囲むように上記保持杆に取着される透明な密封防水カバー部材とを、有し、該密封防水カバー部材によって上記発光体への水の浸入を防止しているものである。 Further, in use, incident light that has been irradiated onto the base plate from the front and incident on the penetrating portion strikes the reflection sheet and is reflected forward as reflected light, and from the rear of the backing plate. Light is irradiated by the LED illuminator and is transmitted through the transparent acrylic plate and the reflection sheet so as to be emitted forward from the through portion as transmitted light.
Further, the LED illuminator has a light emitter fixed to the holding rod and a transparent sealed waterproof cover member attached to the holding rod so as to surround the light emitter, and the sealed waterproof cover member This prevents water from entering the luminous body.

本発明の道路標識によれば、白色系の反射シートが明るく光って、遠くからでもはっきりと目立って見えて、標示内容が視認し易い。文字、図形が際立って、非常に読み易い。比較的消費電力が少なく、ランニングコストを低減できる。逆光対策が必要な設置場所に、容易に取り付けることができる。   According to the road sign of the present invention, the white reflective sheet shines brightly and clearly stands out even from a distance, and the contents of the indication are easy to visually recognize. Characters and figures stand out and are very easy to read. The power consumption is relatively low and the running cost can be reduced. It can be easily installed at installation locations where backlighting measures are required.

本発明の実施の一形態を示した断面図である。It is sectional drawing which showed one Embodiment of this invention. 本発明の道路標識の一例を示した斜視図である。It is the perspective view which showed an example of the road sign of this invention. ＬＥＤ照明器の拡大断面図である。It is an expanded sectional view of an LED illuminator. ＬＥＤ照明器の配置を示した簡略正面図である。It is the simplified front view which showed arrangement | positioning of LED illuminator.

以下、実施の形態を示す図面に基づき本発明を詳説する。
図１と図２に示すように、本発明の道路標識は、文字、図形等を切欠形成した貫通部２を有する剛性の高いベース板１を備え、ベース板１の前面に一体状に積層された有色彩の再帰性反射シート３を有している。
ベース板１は、Ａｌ製板材から成る。また、文字、図形等とは、文字、図形、地図、交通標識を言う。
再帰性反射シート３は、ベース板１の前面に、例えば、熱融着により一体に積層されている。再帰性反射シート３の色彩は、青色又は緑色が好ましい。 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
As shown in FIGS. 1 and 2, the road sign of the present invention includes a highly rigid base plate 1 having a penetrating portion 2 in which characters, figures and the like are notched, and is laminated integrally on the front surface of the base plate 1. The color retroreflective sheet 3 is provided.
The base plate 1 is made of an Al plate material. Moreover, a character, a figure, etc. mean a character, a figure, a map, and a traffic sign.
The retroreflection sheet 3 is integrally laminated on the front surface of the base plate 1 by, for example, heat sealing. The color of the retroreflective sheet 3 is preferably blue or green.

本発明の道路標識は、白色系の半透明の反射シート４を一体状に透明アクリル板５に積層して、ベース板１の後面側に固着された裏当て板２０を、備えている。さらに、裏当て板２０の後方位置にＬＥＤ照明器６を設けている。
裏当て板２０は、少なくとも貫通部２を後方から閉じるように、ベース板１の後面の一部に配設され、Ａｌ製型材から成る取着具１０によってベース板１の後面側に固着されている。裏当て板２０の外周端縁部と取着具１０との間には、シリコン系材料から成るコーキング材１３が介設されている。 The road sign of the present invention includes a backing plate 20 in which a white translucent reflective sheet 4 is integrally laminated on a transparent acrylic plate 5 and fixed to the rear surface side of the base plate 1. Further, an LED illuminator 6 is provided at a rear position of the backing plate 20.
The backing plate 20 is disposed on a part of the rear surface of the base plate 1 so as to close at least the penetrating portion 2 from the rear, and is fixed to the rear surface side of the base plate 1 by an attachment 10 made of an Al mold material. Yes. A caulking material 13 made of a silicon-based material is interposed between the outer peripheral edge of the backing plate 20 and the attachment 10.

本発明の道路標識は、使用状態に於て、ベース板１に前方から光が照射され貫通部２に射し込んだ入射光Ｒ０が反射シート４に当たって反射光Ｒ２として前方へ反射されている。また、裏当て板２０の後方からＬＥＤ照明器６によって光が照射され透明アクリル板５及び反射シート４を透過して貫通部２から前方へ透過光Ｒ１として放射されている。
即ち、本発明の道路標識は、逆光線となった場合でも、前方からの光の反射光Ｒ２とＬＥＤ照明器６による透過光Ｒ１とが合わさって、ベース板１の貫通部２が明るく輝き、青色又は緑色の部分から白色の文字・図形が際立って、標示内容が認識し易い。さらに言えば、ＬＥＤ照明器６が消灯状態であっても、白色系の反射シート４は、前方からの光を、再帰性反射シート３よりも多く反射させ、白色の文字・図形が目立って読み易い。 In the use state of the road sign of the present invention, the incident light R 0 that is irradiated from the front to the base plate 1 and is incident on the penetrating portion 2 hits the reflection sheet 4 and is reflected forward as reflected light R 2. Yes. Further, light is emitted from the rear of the backing plate 20 by the LED illuminator 6, is transmitted through the transparent acrylic plate 5 and the reflective sheet 4, and is radiated forward from the through portion 2 as transmitted light R 1 .
That is, road signs present invention, even when a backward ray, Together, the transmitted light R 1 by the reflected light R 2 and LED illuminator 6 of light from the front, bright shine through portion 2 of the base plate 1 is White characters / graphics stand out from the blue or green part, and the contents of the marking are easy to recognize. Furthermore, even when the LED illuminator 6 is turned off, the white reflective sheet 4 reflects more light from the front than the retroreflective sheet 3 so that white characters and figures are conspicuously read. easy.

図３と図４に示すように、ＬＥＤ照明器６は、断面コ字形状の保持杆９に固着された発光体８と、発光体８を取り囲むように保持杆９に取着される透明な密封防水カバー部材７とを、有している。ＬＥＤ照明器６は、密封防水カバー部材７によって発光体８への水の浸入を防止している。
発光体８は、白色系の発光ダイオードから成り、帯状基板１４の複数個が所定のピッチで組込まれている。発光体８と帯状基板１４は、その表面に防湿のためのフッ素コーティング層１６が形成されている。
保持杆９は、Ａｌ製の型枠材（フレーム部材）であって、開口部を前方に向けている。保持杆９の内部後奥面には、複数個の発光体８が組み込まれた帯状基板１４が固着されている。保持杆９は、矩形状に組み立てられた外枠３０の内部に、左右の縦杆を連結するように複数本が左右方向に取り付けられて、外枠３０の補強部材として兼用されている。なお、図１では、外枠３０を図示省略している。
密封防水カバー部材７は、正面視帯板状の透明樹脂（アクリル）製板材であって、保持杆９の開口部近傍に設けられた凹溝１９，１９に差し込まれて嵌着されている。密封防水カバー部材７の前面側上下両端部には、防水のためのシリコンコーキング部１８，１８が形成されている。このように、密封防水カバー部材７は、発光体８を包囲して密封状の防水空間１５を形成している。この構成により、防水空間１５には、水が吹き付けられても浸水せず、かつ、粉塵が内部に浸入しないように防水処理が施されている。 As shown in FIGS. 3 and 4, the LED illuminator 6 includes a light emitter 8 fixed to a holding rod 9 having a U-shaped cross section and a transparent member attached to the holding rod 9 so as to surround the light emitter 8. And a sealed waterproof cover member 7. The LED illuminator 6 prevents water from entering the light emitter 8 by the sealed waterproof cover member 7.
The light emitter 8 is formed of a white light emitting diode, and a plurality of strip-like substrates 14 are incorporated at a predetermined pitch. The light emitting body 8 and the belt-like substrate 14 have a fluorine coating layer 16 for moisture prevention formed on the surfaces thereof.
The holding rod 9 is a mold member (frame member) made of Al and has an opening facing forward. A belt-like substrate 14 in which a plurality of light emitters 8 are incorporated is fixed to the inner rear back surface of the holding rod 9. A plurality of holding rods 9 are attached to the inside of the outer frame 30 assembled in a rectangular shape in the left-right direction so as to connect the left and right vertical rods, and are also used as reinforcing members for the outer frame 30. In FIG. 1, the outer frame 30 is not shown.
The sealing waterproof cover member 7 is a plate material made of transparent resin (acrylic) in the shape of a band when viewed from the front, and is inserted into and fitted into concave grooves 19 and 19 provided in the vicinity of the opening of the holding rod 9. Silicon coking parts 18 and 18 for waterproofing are formed at both upper and lower ends on the front side of the sealed waterproof cover member 7. As described above, the sealed waterproof cover member 7 surrounds the light emitter 8 and forms a sealed waterproof space 15. With this configuration, the waterproof space 15 is waterproofed so that it will not be submerged even when water is sprayed and dust will not enter the interior.

上述した本発明の道路標識の作用について説明する。
本発明の道路標識を、道路上の地面から所定の高さ寸法となるように配設（設置）して、前方から自動車のヘッドライトを照射し、かつ、ＬＥＤ照明器６を点灯させる。この際、前方からのヘッドライトの光の大半は、ベース板１の前面の再帰性反射シート３に反射し、青色又は緑色の光を放つ。なおかつ、ヘッドライトの光の一部が、貫通部２に射し込んで反射シート４に当たり、反射光Ｒ２として前方へ反射される。また、裏当て板２０の後方からＬＥＤ照明器６によって光が照射され、透明アクリル板５及び反射シート４を透過して貫通部２から前方へ透過光Ｒ１として放射している。
即ち、自動車のドライバーが前方から本発明の道路標識を見た際、前方からのヘッドライトの光の反射光Ｒ２と、後方のＬＥＤ照明器６による透過光Ｒ１とが、白色系の反射シート４を輝かせて、再帰性反射シート３より明るく見える。なお、実験を行って得た使用状態における反射シート４の照度は、反射光Ｒ２による照度が７９６．１lx（換算値）となり、透過光Ｒ１による照度が６７０．０lx（実測値）となり、これらを合計して１４６６．１lxとなることが判っている。従って、本発明の道路標識では、青色又は緑色の基盤から白色の文字・図形が際立って、標示内容が認識し易い。 The operation of the road sign of the present invention described above will be described.
The road sign of the present invention is disposed (installed) so as to have a predetermined height from the ground on the road, the headlight of the automobile is irradiated from the front, and the LED illuminator 6 is turned on. At this time, most of the light of the headlight from the front is reflected on the retroreflective sheet 3 on the front surface of the base plate 1 and emits blue or green light. Yet, part of the light of the headlight, in Sashikon the penetrating portion 2 strikes the reflective sheet 4, is reflected forward as reflected light R 2. Moreover, light is irradiated from the back of the backing plate 20 by the LED illuminator 6, passes through the transparent acrylic plate 5 and the reflection sheet 4, and radiates forward as transmitted light R 1 from the penetrating portion 2.
That is, when the automobile driver sees the road sign of the present invention from the front, the reflected light R 2 of the headlight from the front and the transmitted light R 1 from the rear LED illuminator 6 are reflected in white. The sheet 4 shines and looks brighter than the retroreflective sheet 3. In addition, the illuminance of the reflection sheet 4 in the use state obtained by conducting the experiment is 796.1 lx (converted value) for the reflected light R 2 , and 670.0 lx (actually measured value) for the transmitted light R 1 . It is known that these total 1466.1 lx. Therefore, in the road sign of the present invention, white characters / graphics stand out from the blue or green base and the contents of the sign are easy to recognize.

なお、本発明は、設計変更可能であって、例えば、保持杆９は、矩形状外枠３０の上下の横杆を連結するように複数本が上下方向に取り付けられていても良い。   The design of the present invention can be changed. For example, a plurality of holding rods 9 may be attached in the vertical direction so as to connect the upper and lower horizontal rods of the rectangular outer frame 30.

以上のように、本発明に係る道路標識は、文字、図形等を切欠形成した貫通部２を有する剛性の高いベース板１と、ベース板１の前面に一体状に積層された有色彩の再帰性反射シート３と、白色系の半透明の反射シート４を一体状に透明アクリル板５に積層して、ベース板１の後面側に固着された裏当て板２０とを、備え、裏当て板２０の後方位置にＬＥＤ照明器６を設けたので、白色系の反射シート４が再帰性反射シート３より一層明るく光って、遠くからでもはっきりと目立って見えて、標示内容が視認し易い。文字、図形等が際立って、非常に読み易い。比較的消費電力が少なく、ランニングコストを低減できる。逆光対策が必要な設置場所に、容易に取り付けることができる。   As described above, the road sign according to the present invention includes a rigid base plate 1 having a penetrating portion 2 in which characters, figures, and the like are notched, and a colored recursion laminated integrally on the front surface of the base plate 1. A reflective plate 3 and a white translucent reflective sheet 4 integrally laminated on a transparent acrylic plate 5 and a backing plate 20 fixed to the rear side of the base plate 1. Since the LED illuminator 6 is provided at the rear position 20, the white reflective sheet 4 shines brighter than the retroreflective sheet 3, and is clearly visible even from a distance, so that the contents of the indication are easy to visually recognize. Characters, figures, etc. stand out and are very easy to read. The power consumption is relatively low and the running cost can be reduced. It can be easily installed at installation locations where backlighting measures are required.

また、使用状態に於て、ベース板１に前方から光が照射され貫通部２に射し込んだ入射光Ｒ０が反射シート４に当たって反射光Ｒ２として前方へ反射されると共に、裏当て板２０の後方からＬＥＤ照明器６によって光が照射され透明アクリル板５及び反射シート４を透過して貫通部２から前方へ透過光Ｒ１として放射されるように構成されているので、逆光線でも表示面に示した文字又は図形が見易い。即ち、表裏両面から光が照射された場合でも、表示面のコントラストが良く、白色部分の文字・図形がつぶれることなく、標示内容を視認することができる。 In use, the incident light R 0 irradiating the base plate 1 from the front and entering the penetrating portion 2 hits the reflection sheet 4 and is reflected forward as reflected light R 2 , and the backing plate Since light is emitted from the rear side of the LED illuminator 6 through the transparent acrylic plate 5 and the reflection sheet 4 and radiated forward from the penetrating portion 2 as transmitted light R 1 , even a reverse light is displayed. The characters or figures shown on the surface are easy to see. That is, even when light is irradiated from both the front and back surfaces, the display surface has good contrast, and the contents of the indication can be visually recognized without losing the characters and figures in the white portion.

また、ＬＥＤ照明器６は、保持杆９に固着された発光体８と、発光体８を取り囲むように保持杆９に取着される透明な密封防水カバー部材７とを、有し、密封防水カバー部材７によって発光体８への水の浸入を防止しているので、ＬＥＤ照明器６全体を覆うケーシングを必要とせず、（枠材のみで構成可能であって、）軽量化でき、かつ、構造が簡素で、施工上取り扱いが有利である。また、従来の蛍光灯と比較して、消費電力が少なく、また、交換の手間を省くことができ、ランニングコストを低く抑えることができる。   Further, the LED illuminator 6 has a light emitter 8 fixed to the holding rod 9 and a transparent sealed waterproof cover member 7 attached to the holding rod 9 so as to surround the light emitter 8, and is sealed waterproof. Since the cover member 7 prevents water from entering the light emitter 8, a casing that covers the entire LED illuminator 6 is not required, and the weight can be reduced (it can be configured only by a frame material), and The structure is simple and handling is advantageous in construction. Moreover, compared with the conventional fluorescent lamp, power consumption is low, the trouble of replacement can be saved, and the running cost can be kept low.

１ ベース板
２ 貫通部
３ 再帰性反射シート
４ 反射シート
５ 透明アクリル板
６ ＬＥＤ照明器
７ 密封防水カバー部材
８ 発光体
９ 保持杆
２０ 裏当て板
Ｒ０ 入射光
Ｒ１ 透過光
Ｒ２ 反射光 DESCRIPTION OF SYMBOLS 1 Base plate 2 Penetration part 3 Retroreflective sheet 4 Reflective sheet 5 Transparent acrylic plate 6 LED illuminator 7 Sealing waterproof cover member 8 Light emitter 9 Holding rod 20 Backing plate R 0 Incident light R 1 Transmitted light R 2 Reflected light

Claims (3)

文字、図形等を切欠形成した貫通部（２）を有する剛性の高いベース板（１）と、
該ベース板（１）の前面に一体状に積層された有色彩の再帰性反射シート（３）と、
白色系の半透明の反射シート（４）を一体状に透明アクリル板（５）に積層して、上記ベース板（１）の後面側に固着された裏当て板（２０）とを、備え、
該裏当て板（２０）の後方位置にＬＥＤ照明器（６）を設けたことを特徴とする道路標識。 A highly rigid base plate (1) having a penetrating part (2) in which characters, figures, etc. are cut out;
A colored retroreflective sheet (3) laminated integrally on the front surface of the base plate (1);
A white translucent reflective sheet (4) integrally laminated on a transparent acrylic plate (5), and a backing plate (20) fixed to the rear surface side of the base plate (1),
A road sign characterized in that an LED illuminator (6) is provided at a rear position of the backing plate (20). 使用状態に於て、上記ベース板（１）に前方から光が照射され上記貫通部（２）に射し込んだ入射光（Ｒ０）が上記反射シート（４）に当たって反射光（Ｒ２）として前方へ反射されると共に、上記裏当て板（２０）の後方から上記ＬＥＤ照明器（６）によって光が照射され上記透明アクリル板（５）及び上記反射シート（４）を透過して上記貫通部（２）から前方へ透過光（Ｒ１）として放射されるように構成されている請求項１記載の道路標識。 In use, incident light (R 0 ) irradiated from the front and incident on the penetrating part (2) is incident on the base sheet (1) and hits the reflection sheet (4) to be reflected light (R 2 ). And is reflected by the LED illuminator (6) from the rear of the backing plate (20) and passes through the transparent acrylic plate (5) and the reflective sheet (4). road signs according to claim 1, characterized in that is configured to be emitted as transmitted light from the unit (2) forward (R 1). 上記ＬＥＤ照明器（６）は、保持杆（９）に固着された発光体（８）と、該発光体（８）を取り囲むように上記保持杆（９）に取着される透明な密封防水カバー部材（７）とを、有し、該密封防水カバー部材（７）によって上記発光体（８）への水の浸入を防止している請求項１又は２記載の道路標識。   The LED illuminator (6) includes a light emitting body (8) fixed to a holding bowl (9), and a transparent hermetically sealed waterproof attached to the holding bowl (9) so as to surround the light emitting body (8). The road sign according to claim 1 or 2, further comprising a cover member (7), wherein the sealed waterproof cover member (7) prevents water from entering the light emitter (8).
JP2012236415A 2012-10-26 2012-10-26 Road sign Pending JP2014084679A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105088982A (en) * 2015-07-28 2015-11-25 交通运输部公路科学研究所 Traffic sign board capable of being used in backlighting environment
US10876702B2 (en) 2014-08-13 2020-12-29 Koito Manufacturing Co., Ltd. Dual light sources having similar solor temperatures and different spectral characteristics
KR102485103B1 (en) * 2022-04-29 2023-01-06 주식회사 케이지 Transmissive panel, traffic sign using it and manufacturing method thereof

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JPH0229079U (en) * 1988-08-15 1990-02-23
JPH0649815A (en) * 1992-06-26 1994-02-22 Sangyo Shizai Center:Kk Signpost device
JP2003109187A (en) * 2001-10-01 2003-04-11 Koito Ind Ltd Display
JP2008305773A (en) * 2007-05-09 2008-12-18 Nisshin Kasei Kogyo Kk Display lamp
JP2009249988A (en) * 2008-04-10 2009-10-29 Kowa Sangyo Kk Traffic sign
JP2011509360A (en) * 2008-01-04 2011-03-24 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Post with reflector

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Publication number Priority date Publication date Assignee Title
JPH0229079U (en) * 1988-08-15 1990-02-23
JPH0649815A (en) * 1992-06-26 1994-02-22 Sangyo Shizai Center:Kk Signpost device
JP2003109187A (en) * 2001-10-01 2003-04-11 Koito Ind Ltd Display
JP2008305773A (en) * 2007-05-09 2008-12-18 Nisshin Kasei Kogyo Kk Display lamp
JP2011509360A (en) * 2008-01-04 2011-03-24 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Post with reflector
JP2009249988A (en) * 2008-04-10 2009-10-29 Kowa Sangyo Kk Traffic sign

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10876702B2 (en) 2014-08-13 2020-12-29 Koito Manufacturing Co., Ltd. Dual light sources having similar solor temperatures and different spectral characteristics
CN105088982A (en) * 2015-07-28 2015-11-25 交通运输部公路科学研究所 Traffic sign board capable of being used in backlighting environment
CN105088982B (en) * 2015-07-28 2024-01-09 交通运输部公路科学研究所 Traffic sign plate capable of being used in backlight environment
KR102485103B1 (en) * 2022-04-29 2023-01-06 주식회사 케이지 Transmissive panel, traffic sign using it and manufacturing method thereof

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