JPH0432708Y2 - - Google Patents
Info
- Publication number
- JPH0432708Y2 JPH0432708Y2 JP1988077631U JP7763188U JPH0432708Y2 JP H0432708 Y2 JPH0432708 Y2 JP H0432708Y2 JP 1988077631 U JP1988077631 U JP 1988077631U JP 7763188 U JP7763188 U JP 7763188U JP H0432708 Y2 JPH0432708 Y2 JP H0432708Y2
- Authority
- JP
- Japan
- Prior art keywords
- light
- glass beads
- adhesive layer
- plate
- display section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000011324 bead Substances 0.000 claims description 62
- 239000011521 glass Substances 0.000 claims description 55
- 239000012790 adhesive layer Substances 0.000 claims description 40
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 239000004698 Polyethylene Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- -1 polyethylene Polymers 0.000 description 5
- 229920000573 polyethylene Polymers 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 4
- 239000000049 pigment Substances 0.000 description 4
- 238000007740 vapor deposition Methods 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007603 infrared drying Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は、交通標識等の表示器に関し、特に
バツクライトを備えた表示器に関するものであ
る。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to indicators such as traffic signs, and particularly relates to indicators equipped with a backlight.
従来の表示器としては、実公昭29−10824号公
報に記載のものが知られている。これは、ガラス
ビーズが金属粉末を含む接着剤層を基板上に塗布
し、この接着剤層の表面に文字等を描き、この上
に合成樹脂皮膜を被覆したものである。また、バ
ツクライト付の従来例としては、実開昭47−
30683号公報に記載のものが知られている。これ
は、透明板の上に接着剤層を設け、この接着剤層
上にガラスビーズを設け、透明板の裏側に光源を
設けたものである。
As a conventional display device, one described in Japanese Utility Model Publication No. 10824/1983 is known. In this method, an adhesive layer containing glass beads and metal powder is applied onto a substrate, characters, etc. are drawn on the surface of this adhesive layer, and a synthetic resin film is coated on this adhesive layer. In addition, as a conventional example with a back light,
The one described in Publication No. 30683 is known. This has an adhesive layer provided on a transparent plate, glass beads provided on the adhesive layer, and a light source provided on the back side of the transparent plate.
従来例は、ともに再帰反射手段を備えていない
ので、再帰反射効果が低く、特にバツクライトの
ない従来例は夜間の視認性が著しく劣るものであ
つた。また、バツクライト付の従来例も、光はガ
ラスビーズにも入射するので、外からの光の入射
と内からの光の入射とでかえつて表示が見にくく
なるという不都合もあつた。
Since the conventional examples are not equipped with retroreflective means, the retroreflective effect is low, and in particular, the conventional examples without a backlight have extremely poor visibility at night. Further, in the conventional example with a backlight, the light also enters the glass beads, so that the display becomes difficult to see because the light enters from the outside and the light comes from the inside.
そこで、この考案は、再帰反射効果が高く、昼
夜間を問わず視認性に優れた表示器を提供するこ
とを目的とする。 Therefore, the object of this invention is to provide a display device with a high retroreflection effect and excellent visibility regardless of day or night.
上述の目的を達成するため、この考案は、光を
透過させる透光板の裏面に必要な文字図形等を着
色インクで印刷等して表示部を形成し、透光板の
裏側に設けられた透光性を備えた裏板に透光性を
有する接着剤層を設け、この接着剤層の表面でガ
ラスビーズを透光板に対向するように担持しかつ
接着剤層に埋没するガラスビーズのほぼ半球面に
再帰反射手段を設け、裏板の裏側に裏板及び接着
剤層を透過して透光板の表面へ光を透過させる光
源を設けたものである。
In order to achieve the above-mentioned purpose, this invention forms a display part by printing the necessary characters and figures with colored ink on the back side of a light-transmitting plate that transmits light. A translucent adhesive layer is provided on a translucent back plate, and glass beads are supported on the surface of this adhesive layer so as to face the translucent plate, and the glass beads are embedded in the adhesive layer. A retroreflection means is provided on a substantially hemispherical surface, and a light source is provided on the back side of the back plate to transmit light through the back plate and adhesive layer to the surface of the transparent plate.
この考案において、透光板から光が入射する
と、透光板並びに表示部を透過してガラスビーズ
に入射して再帰反射手段により再帰反射される。
ガラスビーズの接着剤層に埋没されたほぼ半球面
を覆う再帰反射手段がないと、ガラスビーズに入
射した光の一部しか再帰反射しない。また、ガラ
スビーズ間の接着剤層に入射した光の大半は裏板
を透過する。光源の光は裏板及び接着剤層を透過
してガラスビーズの間隙から透光板を通つて外部
に照射され、表示部を明確に表示する。特に薄暮
時や車のヘツドライトが下向きに照射され、外部
からガラスビーズに光が入射しない状況でも、光
源の存在により表示部の表示がドライバー等に明
瞭に視認される。光源からの光はガラスビーズに
全然入射しないか、入射しても大半が反射される
ので、外部からの光を再帰反射させる効果を減じ
るおそれはない。
In this invention, when light enters from the light-transmitting plate, it passes through the light-transmitting plate and the display section, enters the glass beads, and is retroreflected by the retroreflection means.
Without a retroreflective means that covers the substantially hemispherical surface embedded in the adhesive layer of the glass bead, only a portion of the light incident on the glass bead will be retroreflected. Moreover, most of the light incident on the adhesive layer between the glass beads is transmitted through the back plate. The light from the light source passes through the back plate and the adhesive layer, and is irradiated to the outside through the light-transmitting plate through the gaps between the glass beads, thereby clearly displaying the display area. In particular, even at dusk or when a car's headlights are shining downward and no light enters the glass beads from the outside, the presence of the light source allows drivers and others to clearly see what is displayed on the display. Since the light from the light source does not enter the glass beads at all, or even if it does, most of it is reflected, there is no risk of reducing the effect of retroreflecting external light.
以下に、この考案の好適な実施例を図面を参照
にして説明する。
Preferred embodiments of this invention will be described below with reference to the drawings.
第１図において、光を透過させる透光板１の裏
面に必要な文字図形等を着色インクで印刷等して
表示部２を形成してある。透光板１としては、透
明なアクリル板等の使用が好適である。このよう
な表示部２が裏面に形成された透光板１の裏側に
空間を設けて基板５を設けてある。この基板５が
形成する空間内に透光性を備えた裏板１１を設
け、この裏板１１に透光性を有する接着剤層９を
設け、この接着剤層９の表面でガラスビーズ３を
透光板１に対向するように担持してある。また、
ガラスビーズ３の接着剤層９に埋没するほぼ半球
面の部分に再帰反射手段４を設けてある。さら
に、裏板１１の裏側には光源１０を設けてある。
このガラスビーズ３はその直径が25μm以上のも
ので少なくとも屈折率1.7以上のものが好ましい。
再帰反射手段４としては、アルミニウム等の金属
蒸着を使用した。このようなガラスビーズ３と再
帰反射手段４の形成は、第３図乃至第５図に示す
ように行われる。すなわち、まず第３図に示すよ
うに表面平滑な紙或いはポリエステルフイルム等
の基材６の平滑な表面に熱溶解時に溶着しにくい
ポリエチレンまたは塩化ビニール等のビーズ仮接
着層７を形成して、剥離部材８を構成する。この
場合基材６にポリエチレンシートを重ねて密着し
ても良いし、ポリエチレンや塩化ビニール等を塗
布してビーズ仮接着層７を形成しても良い。この
ビーズ仮接着層７の厚みは5μm乃至20μm程度に
形成する。このように構成された剥離部材８の表
面すなわちポリエチレンや塩化ビニール等のビー
ズ仮接着層７にガラスビーズ３を散布機（図示せ
ず）により付着量を均一にするため300g／m2位
多量に散布する。ガラスビーズ３を散布した剥離
部材８を70〜90℃位の炉内温度に設定された赤外
線乾燥炉（図示せず）内へ毎分２〜4mの速度で
順次送り込む。赤外線乾燥炉内において熱処理が
施されると、ポリエチレン或いは塩化ビニールか
ら成るビーズ仮接着層７は溶解してガラスビーズ
３の下端部を包み込み、これによつて、ガラスビ
ーズ３が一時的にビーズ仮接着層７に付着する。
さらに、ガラスビーズ３の上方から圧力をかけて
ガラスビーズ３の下端が基材６の平滑な表面に当
たつてそれ以上没入しない程度に埋没させてお
く。このようにしてガラスビーズ３をビーズ仮接
着層７に埋没させた後、第４図に示すように再帰
反射手段４を構成する金属蒸着を、露出するガラ
スビーズ３の表面に施す。他方、裏板１１を接着
剤をコーテイングして接着剤層９を形成してお
く。この接着剤層９が形成された裏板１１と剥離
部材８とを重ね合わせ、熱ロールにて約140℃の
温度で加熱し、接着剤層９の粘着性を復活させ
る。加熱後にコンプレツサーを始動してガラスビ
ーズ３を接着剤層９内へ押し込むように加圧す
る。加熱加圧により接着剤層９は溶融し、この溶
融した接着剤層９内にガラスビーズ３が没入され
ることとなる。ついで、基材６の材料として紙を
使用した場合には、剥離部材８に水分を噴霧機に
より噴霧し、これにより紙の紙力を復活させ、そ
の後剥離部材８を接着剤層から剥離することによ
り、ガラスビーズ３を接着剤層９内へ残し、ガラ
スビーズ３及び再帰反射手段４を接着剤層９の表
面側に形成することとなる。また、第１図に示す
実施例では、透光板１とガラスビーズ３との個所
には若干の間隙を設けるようにしたが、ガラスビ
ーズ３と透光板１とが軽く接触する程度であつて
も差し支えない。 In FIG. 1, a display section 2 is formed by printing necessary characters and figures with colored ink on the back surface of a transparent plate 1 that transmits light. As the transparent plate 1, it is preferable to use a transparent acrylic plate or the like. A substrate 5 is provided with a space provided on the back side of a transparent plate 1 on which such a display section 2 is formed. A light-transmitting back plate 11 is provided in the space formed by this substrate 5, a light-transmitting adhesive layer 9 is provided on this back plate 11, and glass beads 3 are placed on the surface of this adhesive layer 9. It is supported so as to face the transparent plate 1. Also,
A retroreflective means 4 is provided in a substantially hemispherical portion of the glass bead 3 that is buried in the adhesive layer 9. Further, a light source 10 is provided on the back side of the back plate 11.
The glass beads 3 preferably have a diameter of 25 μm or more and a refractive index of at least 1.7.
As the retroreflection means 4, metal vapor deposition such as aluminum was used. The formation of such glass beads 3 and retroreflection means 4 is performed as shown in FIGS. 3 to 5. That is, as shown in FIG. 3, first, a bead temporary adhesive layer 7 made of polyethylene or vinyl chloride, which is difficult to weld during hot melting, is formed on the smooth surface of a base material 6 such as paper or polyester film, and then peeled off. This constitutes member 8. In this case, polyethylene sheets may be stacked and adhered to the base material 6, or bead temporary adhesive layer 7 may be formed by coating polyethylene, vinyl chloride, or the like. The thickness of this bead temporary adhesive layer 7 is formed to be approximately 5 μm to 20 μm. Glass beads 3 are applied to the surface of the peeling member 8 configured in this way, that is, the bead temporary adhesive layer 7 made of polyethylene, vinyl chloride, etc., in an amount of about 300 g/ m2 to make the amount of adhesion uniform by using a scatterer (not shown). Spread. The peeling member 8 on which the glass beads 3 have been scattered is sequentially fed into an infrared drying oven (not shown) set at an internal temperature of about 70 to 90° C. at a speed of 2 to 4 m/min. When heat-treated in an infrared drying oven, the bead temporary adhesive layer 7 made of polyethylene or vinyl chloride melts and wraps around the lower end of the glass beads 3, thereby causing the glass beads 3 to temporarily become bead temporary. It adheres to the adhesive layer 7.
Further, pressure is applied from above the glass beads 3 to bury the glass beads 3 to such an extent that the lower ends of the glass beads 3 hit the smooth surface of the base material 6 and do not sink any further. After the glass beads 3 are buried in the bead temporary adhesive layer 7 in this manner, metal vapor deposition constituting the retroreflection means 4 is applied to the exposed surface of the glass beads 3, as shown in FIG. On the other hand, the adhesive layer 9 is formed by coating the back plate 11 with an adhesive. The back plate 11 on which the adhesive layer 9 has been formed and the peeling member 8 are placed on top of each other and heated at a temperature of about 140° C. using a hot roll to restore the adhesiveness of the adhesive layer 9. After heating, the compressor is started to pressurize the glass beads 3 into the adhesive layer 9. The adhesive layer 9 is melted by heating and pressurizing, and the glass beads 3 are immersed into the melted adhesive layer 9. Next, when paper is used as the material for the base material 6, water is sprayed onto the peeling member 8 using a sprayer to restore the paper strength of the paper, and then the peeling member 8 is peeled from the adhesive layer. As a result, the glass beads 3 are left in the adhesive layer 9, and the glass beads 3 and the retroreflective means 4 are formed on the surface side of the adhesive layer 9. In addition, in the embodiment shown in FIG. 1, a slight gap is provided between the light-transmitting plate 1 and the glass beads 3, but it is sufficient that the glass beads 3 and the light-transmitting plate 1 come into light contact with each other. There is no problem.
第６図に示す実施例は、再帰反射手段４として
真珠光沢顔料を使用したものを示す。この真珠光
沢顔料はガラスビーズ３の埋没部分に沿つて何層
かに配列されている。このような真珠光沢顔料の
代わりに金属粉を使用することも可能である。 The embodiment shown in FIG. 6 uses a pearlescent pigment as the retroreflection means 4. This pearlescent pigment is arranged in several layers along the buried portion of the glass beads 3. It is also possible to use metal powder instead of such pearlescent pigments.
なお、基板５としては、アクリル板やアルミ板
或いは金属板等の使用が好適である。 Note that as the substrate 5, it is preferable to use an acrylic plate, an aluminum plate, a metal plate, or the like.
このように構成されたこの考案を第２図に示す
ような交通標識として構成した場合、透光板１に
入射した光は表示部２も透過し、ガラスビーズ３
に入射し、ガラスビーズ３の埋没部分に形成され
た再帰反射手段４によりガラスビーズ３内を再帰
反射する。このガラスビーズ３から反射されてき
た光は、表示部２及び透光板１を透過して入射し
てきた方向へ反射していく。これにより、表示部
２は明瞭にドライバー等に視認されることとな
る。金属蒸着や真珠光沢顔料等から成る再帰反射
手段４をガラスビーズ３の埋没部分の周りに設け
ない場合には、再帰反射する光が少なくなり、視
認性も悪化する。光源１０からの光は大半が裏板
１１と接着剤層９を透過しガラスビーズ３の間隙
から表示部２及び透光板１を通過して外部に出
る。従つて、表示部２は外部からの光が入射しな
くても明瞭に視認することができる。外部から光
が入射してきたときには、光源１０からの光はガ
ラスビーズ３の個所に殆ど入射しないので、外部
からの光がガラスビーズ３に入射して再帰反射す
る。従つて、外部からの光が入射した時に光源１
０の光が邪魔をして表示部２の表示が見にくくな
ることはない。 When this device constructed in this way is constructed as a traffic sign as shown in FIG. 2, the light incident on the transparent plate 1 also passes through the display section 2,
The light enters the glass bead 3 and is retroreflected inside the glass bead 3 by the retroreflection means 4 formed in the buried portion of the glass bead 3 . The light reflected from the glass beads 3 passes through the display section 2 and the transparent plate 1, and is reflected in the direction in which it was incident. Thereby, the display section 2 can be clearly seen by the driver and the like. If the retroreflection means 4 made of metal vapor deposition, pearlescent pigment, etc. is not provided around the buried portion of the glass beads 3, the amount of retroreflected light will decrease, and visibility will deteriorate. Most of the light from the light source 10 passes through the back plate 11 and the adhesive layer 9, passes through the display section 2 and the transparent plate 1 through the gaps between the glass beads 3, and exits to the outside. Therefore, the display section 2 can be clearly viewed even if no external light is incident thereon. When light enters from the outside, the light from the light source 10 hardly enters the glass beads 3, so the light from the outside enters the glass beads 3 and is retroreflected. Therefore, when light from the outside enters, light source 1
The display on the display section 2 will not become difficult to see due to the 0 light.
接着剤層９の表面積全体にガラスビーズ３が占
める割合は30〜80％程度が好ましく、このような
割合の調整によりガラスビーズ３の間隙からの光
の透過量と表示部２の視認性を調整する。なおま
た、JIS Z9117に基づき反射輝度を計測したとこ
ろ、ガラスビーズ３の占有面積が60％、観測角
12′、入射角5°、再帰反射手段４として金属蒸着
膜を使用したとき440であり、ガラスビーズ３の
占有面積が80％のときは520〜550の結果が得られ
た。 The ratio of the glass beads 3 to the entire surface area of the adhesive layer 9 is preferably about 30 to 80%, and by adjusting this ratio, the amount of light transmitted through the gaps between the glass beads 3 and the visibility of the display section 2 can be adjusted. do. Furthermore, when the reflected brightness was measured based on JIS Z9117, the occupied area of glass beads 3 was 60%, and the observation angle was
12', an incident angle of 5 degrees, and a metal vapor deposition film used as the retroreflection means 4, the result was 440, and when the occupied area of the glass beads 3 was 80%, a result of 520 to 550 was obtained.
以上説明したように、この考案によれば、単に
ガラスビーズのみを使用したものではなく接着剤
層に埋没したガラスビーズのほぼ半球面を取り囲
むように再帰反射手段を設けてあるので、外部か
ら入射した光はこのガラスビーズを通過して再帰
反射手段により反射され、再びガラスビーズを通
過して入射した方向へ光が反射、すなわち再帰反
射されることとなる。再帰反射されるために車を
運転するドライバー等は車のヘツドライトの入射
した光と同一方向に光が反射してくるので表示部
を明瞭に視認することとなる。このとき、光源が
点灯していても、光源からの光は殆どガラスビー
ズに入射しないので、外部の光が入射して再帰反
射手段により効果的に再帰反射され、内部の光源
の光により視認性が劣るようなおそれはない。ま
た、表示部の形成個所及びガラスビーズや再帰反
射手段の形成個所は透光板の裏面であるために、
雨や風或いは埃等による悪影響を受けず耐久性に
も優れたものとなる。さらに、外部から光が入射
しない状態では、光源からの光が裏板及び接着剤
層を通過してガラスビーズの間隙から表示部を照
らして透光板から外部へ抜けるために、薄暮時や
ヘツドライトが下向きに照射された場合でも表示
部の視認性が向上する。
As explained above, according to this invention, instead of simply using glass beads, the retroreflection means is provided so as to surround almost the hemispherical surface of the glass beads embedded in the adhesive layer. The light passes through the glass beads, is reflected by the retroreflection means, passes through the glass beads again, and is reflected, that is, retroreflected, in the direction of incidence. Because the light is retroreflected, a driver or the like driving a car can clearly see the display section because the light is reflected in the same direction as the light incident on the headlights of the car. At this time, even if the light source is turned on, almost no light from the light source enters the glass beads, so external light enters and is effectively retroreflected by the retroreflection means, making it highly visible due to the light from the internal light source. There is no fear that it will be inferior. In addition, since the display area and the glass beads and retroreflection means are formed on the back side of the transparent plate,
It is not adversely affected by rain, wind, dust, etc. and has excellent durability. Furthermore, when no light enters from the outside, the light from the light source passes through the back plate and adhesive layer, illuminates the display section through the gaps between the glass beads, and exits from the transparent plate to the outside. The visibility of the display section is improved even when the screen is illuminated downward.
第１図はこの考案の好適な実施例を示す断面
図、第２図は正面図、第３図ないし第５図はガラ
スビーズに再帰反射手段を施す一例を説明するた
めの断面図、第６図は再帰反射手段の他の例を示
す断面図である。
１……透光板、２……表示部、３……ガラスビ
ーズ、４……再帰反射手段、５……基板、９……
接着剤層、１０……光源、１１……裏板。
FIG. 1 is a sectional view showing a preferred embodiment of this invention, FIG. 2 is a front view, FIGS. 3 to 5 are sectional views illustrating an example of applying retroreflection means to glass beads, and FIG. The figure is a sectional view showing another example of retroreflection means. DESCRIPTION OF SYMBOLS 1...Translucent plate, 2...Display part, 3...Glass beads, 4...Retroreflection means, 5...Substrate, 9...
Adhesive layer, 10... light source, 11... back plate.
Claims (1)
等を着色インクで印刷等して表示部を形成し、 透光板の裏側に設けられた透光性を備えた裏板
に透光性を有する接着剤層を設け、 この接着剤層の表面でガラスビーズを透光板に
対向するように担持しかつ接着剤層に埋没するガ
ラスビーズのほぼ半球面に再帰反射手段を設け、 裏板の裏側に裏板及び接着剤層を透過して透光
板の表面へ光を透過させる光源を設けたことを特
徴とする表示器。[Scope of Claim for Utility Model Registration] A display section is formed by printing necessary characters and figures etc. with colored ink on the back side of a light-transmitting plate that transmits light, and the light-transmitting property provided on the back side of the light-transmitting plate is A transparent adhesive layer is provided on the back plate, and the glass beads are supported on the surface of this adhesive layer so as to face the transparent plate, and the approximately hemispherical surface of the glass beads embedded in the adhesive layer is A display device comprising a retroreflection means and a light source on the back side of the back plate that transmits light through the back plate and the adhesive layer to the surface of the transparent plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988077631U JPH0432708Y2 (en) | 1988-06-10 | 1988-06-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988077631U JPH0432708Y2 (en) | 1988-06-10 | 1988-06-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01181083U JPH01181083U (en) | 1989-12-27 |
| JPH0432708Y2 true JPH0432708Y2 (en) | 1992-08-06 |
Family
ID=31302605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988077631U Expired JPH0432708Y2 (en) | 1988-06-10 | 1988-06-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0432708Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6288842B1 (en) * | 2000-02-22 | 2001-09-11 | 3M Innovative Properties | Sheeting with composite image that floats |
| AU2003272940B2 (en) | 2002-10-08 | 2008-08-07 | Nippon Carbide Kogyo Kabushiki Kaisha | Recursive-reflection display device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4730683U (en) * | 1971-04-24 | 1972-12-07 | ||
| JPS63194917U (en) * | 1987-06-04 | 1988-12-15 |
-
1988
- 1988-06-10 JP JP1988077631U patent/JPH0432708Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01181083U (en) | 1989-12-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100459780B1 (en) | Electroluminescent retroreflective article | |
| JP2610253B2 (en) | Retroreflective sheet with wrapped flat surface and method of manufacturing the same | |
| US5609938A (en) | Image display apparatus with holes for opposite side viewing | |
| JP3185088B2 (en) | panel | |
| US5962121A (en) | Retroreflective sheet comprising microspheres, the diameter and refractive index of which being specifically related to the refractive indices of layers directly in contact therewith | |
| JP4225599B2 (en) | Image display sheet and image display system | |
| EA001134B1 (en) | Article with holographic and retroreflective features | |
| CN102576104B (en) | Retroreflective article comprising retroreflective prism elements and an etched reflective metal coating | |
| KR20080078004A (en) | Semi-transparent retroreflective sheet and use thereof to make a backlit license plate | |
| WO1998001779A1 (en) | Multilayer film with differential retroreflectivity | |
| JP2000321414A (en) | Photoretroreflective sheet | |
| JPH0432708Y2 (en) | ||
| JPH073484B2 (en) | Transparent spherical buried retroreflector | |
| JPS6241804Y2 (en) | ||
| KR910008854Y1 (en) | Apparatus for reflecting lights | |
| JP2749233B2 (en) | Road marking material | |
| JP3504438B2 (en) | Luminous retroreflective sheet | |
| JPS6132641B2 (en) | ||
| JP2848598B2 (en) | Reflectors for internal illuminated signs | |
| JPH0757935B2 (en) | All-weather type road marking sheet material | |
| JPH0544865Y2 (en) | ||
| JPS5855024Y2 (en) | Retroreflective pattern for thermocompression rolling | |
| JPS6128222Y2 (en) | ||
| JP2003315517A (en) | Retroreflective material | |
| JPH01273085A (en) | Manufacture of sheet for preventing bill |