JPS5934935Y2 - illuminated display device - Google Patents
illuminated display deviceInfo
- Publication number
- JPS5934935Y2 JPS5934935Y2 JP12661779U JP12661779U JPS5934935Y2 JP S5934935 Y2 JPS5934935 Y2 JP S5934935Y2 JP 12661779 U JP12661779 U JP 12661779U JP 12661779 U JP12661779 U JP 12661779U JP S5934935 Y2 JPS5934935 Y2 JP S5934935Y2
- Authority
- JP
- Japan
- Prior art keywords
- light
- guide plate
- light guide
- paraboloid
- display device
- 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
Landscapes
- Illuminated Signs And Luminous Advertising (AREA)
Description
【考案の詳細な説明】
本考案は照光式表示装置の構造に係り、その目的とする
ところは、１つの光源からの光を十分に利用して均一な
平行光線が得られるものを提供するにある。[Detailed description of the invention] The present invention relates to the structure of an illuminated display device, and its purpose is to provide a device that can obtain uniform parallel light beams by fully utilizing the light from one light source. be.
従来の照光式表示装置においては第１図に示したように
放物線形状をした光透過性材料からなる導光板の焦点位
置に光源を配置したものがある。As shown in FIG. 1, some conventional light-emitting display devices have a light source placed at the focal point of a parabolic light guide plate made of a light-transmitting material.
第１図から理解されるように導光板の外周の放物面によ
り反射されて平行光線が得られるのは図中でＡ−Ｂ、Ｃ
−Ｄ間であり、Ｂ−Ｃ間については十分な平行光線が出
てこず、Ａ−Ｄ間全体に均一な平行光線が得られなかっ
た。As can be understood from Fig. 1, parallel rays are obtained by being reflected by the paraboloid on the outer periphery of the light guide plate.
-D, sufficient parallel rays were not produced between B and C, and uniform parallel rays could not be obtained over the entire area between A and D.
そのためこの導光板の一端であるＡ−Ｄ間に例えば複数
個のキートップを並設して、これらを照すようにした場
合を考えると、各キートップの明るさに不均衡を生じる
という問題があった。Therefore, if we consider the case where, for example, a plurality of key tops are arranged in parallel between A and D, which is one end of this light guide plate, and these are illuminated, there is a problem that the brightness of each key top becomes unbalanced. was there.
本考案は」―記欠点に鑑みなされたもので、以下に本考
案の１実施例を図面により説明すると、１は光透過性材
料、例えばアクリル樹脂から戊る導光板で、該導光板１
の焦点位置には光源挿入用の孔１ｂを形成しである。The present invention has been devised in view of the drawbacks mentioned above, and one embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a light guide plate made of a light-transmitting material, such as acrylic resin;
A hole 1b for inserting a light source is formed at the focal point position.
導光板１の形状は略蝶々型をしでお・す、２つの放物線
を、それぞれの焦点を一致させ、且つ、各放物線の開放
側を反対方向に向けるようになっている。The shape of the light guide plate 1 is approximately butterfly-shaped, and the two parabolas have their focal points coincident with each other, and the open sides of each parabola are directed in opposite directions.
そして、導光板１には、導光板１の外周の放物面１ａと
焦点を同じくする別の放物線３ａを構成すべく切欠き３
を設けである。The light guide plate 1 has a notch 3 in order to form another parabola 3a having the same focus as the paraboloid 1a on the outer periphery of the light guide plate 1.
This is provided.
この放物面３ａの働きにより第２図に示したように光源
２からの中央よりの光は平行光線となる。Due to the function of this paraboloid 3a, the light from the center of the light source 2 becomes parallel rays as shown in FIG.
すなわち、導光板１の外形の放物面１ａとは別の放物面
３ａを導光板１に設けたことにより、光源２がらの光は
第３図に示したように導光板１の両端側から均一な平行
光線を出すようにすることができる。That is, by providing the light guide plate 1 with a paraboloid 3a that is different from the paraboloid 1a of the outer shape of the light guide plate 1, the light from the light source 2 is directed to both ends of the light guide plate 1 as shown in FIG. It is possible to emit uniform parallel light rays from
叙上のとおり本考案の照光式表示装置は放物線形状をし
た光透過性材料から成る導光板の外周の放物面とその焦
点が一致した別の放物面を導光板に形成したものであり
、１つの光源から発せられた光を損失させることなく均
一な平行光線を得ることができるものである。As mentioned above, the illuminated display device of the present invention has a paraboloid formed on the outer periphery of a light guide plate made of a parabola-shaped light-transmitting material, and another paraboloid whose focal point coincides with the light guide plate. , it is possible to obtain uniform parallel light rays without loss of light emitted from one light source.
なお、本考案の実施例においては導光板１の外形の放物
面１ａのほかに１つの放物面３ａを設けただけであるが
、第５図に示したように放物面を５、 ６． ７と３つ
以上設けることにより更に確実に平行光線を得ることが
できるようになることは明らかであり、これも本考案の
請求の範囲に含まれることは勿論である。In addition, in the embodiment of the present invention, only one paraboloid 3a is provided in addition to the paraboloid 1a of the outer shape of the light guide plate 1, but as shown in FIG. 6. It is clear that by providing three or more rays 7, parallel rays can be obtained more reliably, and this is of course included in the scope of the present invention.
第１図は従来の照光式表示装置を示す平面図、第２図、
第３図は本考案の照光式表示装置を示す平面図、第４図
は要部断側面図、第５図は本考案の他の実施例を示す平
面図である。
１・・・・・・導光板、１ａ・・・・・・放物線、２・
・・・・・光源、３・・・・・・切欠き、３ａ・・・・
・・放物面。Figure 1 is a plan view showing a conventional illuminated display device;
FIG. 3 is a plan view showing an illuminated display device of the present invention, FIG. 4 is a sectional side view of a main part, and FIG. 5 is a plan view showing another embodiment of the present invention. 1... Light guide plate, 1a... Parabola, 2...
...Light source, 3...Notch, 3a...
...paraboloid.
Claims (1)
置に光源を配置し、該導光板に導光板の外周の放物面と
その焦点が一致した少なくとも別の１つの放物面を設け
て均一な平行光線を得るようにしたことを特徴とする照
光式表示装置。A light source is arranged at the focal point of a light guide plate made of a parabolically shaped light-transmitting material, and the light guide plate is provided with at least one other paraboloid whose focus coincides with a paraboloid on the outer periphery of the light guide plate. An illuminated display device characterized in that a uniform parallel beam of light is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12661779U JPS5934935Y2 (en) | 1979-09-13 | 1979-09-13 | illuminated display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12661779U JPS5934935Y2 (en) | 1979-09-13 | 1979-09-13 | illuminated display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5645875U JPS5645875U (en) | 1981-04-24 |
| JPS5934935Y2 true JPS5934935Y2 (en) | 1984-09-27 |
Family
ID=29358512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12661779U Expired JPS5934935Y2 (en) | 1979-09-13 | 1979-09-13 | illuminated display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5934935Y2 (en) |
-
1979
- 1979-09-13 JP JP12661779U patent/JPS5934935Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5645875U (en) | 1981-04-24 |
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