JP2002297071A - Method for manufacturing light spot type display device - Google Patents

Method for manufacturing light spot type display device

Info

Publication number
JP2002297071A
JP2002297071A JP2001098557A JP2001098557A JP2002297071A JP 2002297071 A JP2002297071 A JP 2002297071A JP 2001098557 A JP2001098557 A JP 2001098557A JP 2001098557 A JP2001098557 A JP 2001098557A JP 2002297071 A JP2002297071 A JP 2002297071A
Authority
JP
Japan
Prior art keywords
light
reflection
dots
guide plate
light guide
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.)
Pending
Application number
JP2001098557A
Other languages
Japanese (ja)
Inventor
Hiroshi Yamazaki
博 山崎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Okaya Electric Industry Co Ltd
Original Assignee
Okaya Electric Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Okaya Electric Industry Co Ltd filed Critical Okaya Electric Industry Co Ltd
Priority to JP2001098557A priority Critical patent/JP2002297071A/en
Publication of JP2002297071A publication Critical patent/JP2002297071A/en
Pending legal-status Critical Current

Links

Landscapes

  • Planar Illumination Modules (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a light spot type display device, in which bright and high- quality display can be obtained and the cloudiness phenomenon of a display body will not be generated, even at a non-lighting time and whose cost is low and which is made to cope with energy saving. SOLUTION: In a light spot type display device, 1 in which a light source 4 is provided at one side face of a light transmission plate 2 which has translucency and which is constituted by forming a plurality of reflection dots, consisting of minute recessed parts and a reflection dot group 6 is displayed, by making rays of light from the light source 4 to be reflected on the reflection dot group 6, after the light transmission plate is formed by changing the arrangement density of reflection dots at flat plate parts and a part which is turned into a curved surface, while anticipating the amount of change in which the opening diameter of the reflection dots formed in the flat board shaped light transmission plate is changed by the curvature of the plate, and the curved surface is formed by bending the plate.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、透光性を有する導
光板に微小な凹部からなる反射ドットを複数形成し、そ
の一側面からの光を反射ドットで反射させて表示体とし
て表示する光点式表示器に係り、特に曲面を有する導光
板を備えてなる光点式表示器の製造方法に関するもので
ある。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light guide plate having a plurality of reflection dots formed of minute concave portions formed on a light-transmitting light-transmitting plate, and reflecting light from one side thereof with the reflection dots to display a display. The present invention relates to a point display, and more particularly to a method of manufacturing a light point display provided with a light guide plate having a curved surface.

【0002】[0002]

【従来の技術】従来、大型の装置であっても僅かな光源
で表示を行えて駆動回路を簡単にすることができるとと
もに、一部の光源が消灯した場合でも表示内容に欠陥が
生じることのない表示装置として、光点式表示器があ
る。この光点式表示器は、アクリル等の透光性を有する
導光板に、その表示面の反対面に微小な円錐形の凹部か
らまる反射ドットを多数配列して表示体を形成するとと
もに、導光板の一側面から光を入射し、反射ドットに光
を反射させて導光板の表示面に明るい表示を行わせるも
のである。これは、LEDを多数使用する表示装置と比
較して、ローコスト、高品質、かつ省エネルギーに対応
した優れた表示装置である。
2. Description of the Related Art Conventionally, even a large-sized device can perform display with a small number of light sources, thereby simplifying a driving circuit. One such display device is a light spot display. This light spot type display is formed by arranging a large number of reflection dots from a small conical concave portion on a surface opposite to the display surface of a light guide plate having translucency such as acrylic to form a display body. Light is incident from one side surface of the light guide plate, and the light is reflected by the reflection dots to provide a bright display on the display surface of the light guide plate. This is an excellent display device that is low-cost, high-quality, and energy-saving as compared to a display device that uses many LEDs.

【0003】[0003]

【発明が解決しようとする課題】上述した光点式表示器
の製造方法としては、平板状のアクリル樹脂板に対しレ
ーザー加工、エッチング、切削加工、樹脂成形等により
微小な反射ドットからなる反射ドット群を形成するもの
である。そして、この平板状の導光板を加熱し撓曲する
ことで曲面を有する光点式表示器が得られるのである
が、この導光板を撓曲した曲面を有する光点式表示器に
あっては、曲面部分の反射ドットと平面部分の反射ドッ
トとで光源からの光の反射に差異が生じて、表示体の明
るさにムラが生じるという問題があった。
As a method of manufacturing the above-mentioned light spot type display, a reflection dot composed of minute reflection dots is formed on a flat acrylic resin plate by laser processing, etching, cutting, resin molding or the like. Form a group. Then, by heating and bending the flat light guide plate, a light spot type display having a curved surface can be obtained.However, in the case of a light spot type display having a curved surface obtained by bending the light guide plate, In addition, there is a problem that a difference occurs in the reflection of light from the light source between the reflection dots on the curved surface portion and the reflection dots on the flat surface portion, resulting in unevenness in brightness of the display body.

【0004】そこで本発明は、曲面を有する導光板を備
える光点式表示器において平面部分も曲面部分も一定の
明るさで高品位な表示を得ることができる光点式表示器
の製造方法を提供することを目的とする。
Accordingly, the present invention provides a method of manufacturing a light spot type display having a light guide plate having a curved surface and capable of obtaining a high-quality display with constant brightness on both flat and curved surfaces. The purpose is to provide.

【0005】[0005]

【課題を解決するための手段】上記目的を達成するた
め、本発明の光点式表示器の製造方法は、透光性を有し
微小な凹部からなる反射ドットを複数形成してなる導光
板の一側面に光源を配設し、上記反射ドットに上記光源
からの光を反射させて表示を行う光点式表示器におい
て、平板状の導光板に形成した反射ドットの開口径が該
導光板の撓曲により変化する変化量を見越して、反射ド
ットを配設する面が曲面の内側になる場合には曲面とな
る部分に形成する反射ドットは平面部分の反射ドットの
配列間隔よりも予め高密度に配列し、また反射ドットを
配設する面が曲面の外側になる場合には曲面となる部分
に形成する反射ドットは平面部分の反射ドットの配列間
隔よりも予め低密度に配列して形成した後、この導光板
を撓曲して曲面を形成することを特徴とするものであ
る。
In order to achieve the above object, a method of manufacturing a light spot type display according to the present invention is directed to a light guide plate formed by forming a plurality of reflective dots each having a light transmitting property and formed of minute concave portions. A light source is disposed on one side surface of the light spot type display device for displaying light by reflecting the light from the light source on the reflection dots, wherein the aperture diameter of the reflection dots formed on the flat light guide plate is equal to the light guide plate. When the surface on which the reflective dots are arranged is inside the curved surface in anticipation of the amount of change due to the bending of the reflective dots, the reflective dots formed on the curved surface are higher than the arrangement intervals of the reflective dots on the flat surface in advance. When the surface on which the reflection dots are arranged is outside the curved surface, the reflection dots to be formed on the curved surface are formed in advance with a lower density than the arrangement interval of the reflection dots on the plane portion. After this, the light guide plate is bent to form a curved surface And it is characterized in Rukoto.

【0006】または、透光性を有し微小な凹部からなる
反射ドットを複数形成してなる導光板の一側面に光源を
配設し、上記反射ドットに上記光源からの光を反射させ
て表示を行う光点式表示器において、平板状の導光板に
形成した反射ドットの開口径が該導光板の撓曲により変
化する変化量を見越して、反射ドットを配設する面が曲
面の内側になる場合には曲面となる部分に形成する反射
ドットは平面部分の反射ドットの開口径よりも予め大径
とし、また反射ドットを配設する面が曲面の外側になる
場合には曲面となる部分に形成する反射ドットは平面部
分の反射ドットの開口径よりも予め小径として形成した
後、この導光板を撓曲して曲面を形成することを特徴と
するものである。
[0006] Alternatively, a light source is provided on one side of a light guide plate having a plurality of light-transmissive reflective dots formed of minute concave portions, and the light from the light source is reflected on the reflective dots for display. In the light spot type display performing the above, in consideration of the amount of change in the opening diameter of the reflection dots formed on the flat light guide plate due to the bending of the light guide plate, the surface on which the reflection dots are arranged is inside the curved surface. In such a case, the reflection dot formed on the curved portion is made larger in diameter than the opening diameter of the reflection dot on the flat portion, and the curved portion is formed when the surface on which the reflection dot is disposed is outside the curved surface. The reflective dots formed in the above are formed in advance so as to have a smaller diameter than the opening diameter of the reflective dots in the plane portion, and then the light guide plate is bent to form a curved surface.

【0007】また、反射ドットは横断面形状が短軸と長
軸を有する非正円形状とするとともに、該長軸は光源か
らの光の進行方向と直交すべく配設したことを特徴とす
るものである。
The reflection dot is characterized in that the cross-sectional shape is a non-circular shape having a short axis and a long axis, and the long axis is arranged to be orthogonal to the traveling direction of light from the light source. Things.

【0008】[0008]

【発明の実施の形態】図1及び図2は、本発明の光点式
表示器を示しており、光点式表示器1は、「く」字形状
に撓曲したアクリル等の透光性を有する導光板2の左右
両側面31、32に、複数個のLEDからなる光源41
2を配置した構成からなる。導光板2は、その左右両
側面31、32と連設する導光板2の裏面5(図1の手前
側で曲面の内側)に、図2に示す表示体となる多数の微
小な凹部からなる円形の反射ドット群61、62、63
形成するとともに、左右両側面31、32から入射する光
源41、42からの光を反射ドット群61、62、63で反
射し、これを導光板2の表示面7側に3個の円形の光の
表示体として表示するものである。8は、導光板2にお
ける上下面に被着した反射テープであり、光源41、42
からの光を効率よく表示面7に導くものである。
1 and 2 show a light point type display according to the present invention. The light point type display 1 is made of a light-transmitting material such as acrylic bent in a "-" shape. A light source 4 1 composed of a plurality of LEDs is provided on both left and right side surfaces 3 1 and 3 2 of the light guide plate 2 having
4 2 consists was arrangement. The light guide plate 2 has a large number of minute recesses on the back surface 5 (inside the curved surface on the near side in FIG. 1) of the light guide plate 2 connected to the left and right side surfaces 3 1 and 3 2 . circular reflective dot groups 61 consisting of, 6 2, 6 3 to form the left and right sides 3 1, 3 light sources 4 1, 4 2 a light reflecting dot groups from 6 1 incident from 2, 6 2, reflected by the 6 3, which is for displaying a display of three circular light on the display surface 7 side of the light guide plate 2. Reference numeral 8 denotes a reflection tape attached to the upper and lower surfaces of the light guide plate 2, and the light sources 4 1 and 4 2
From the light to the display surface 7 efficiently.

【0009】図2に示すごとく、両側の反射ドット群6
1、63が平面部分に位置し、中央の反射ドット群62
曲面に位置している本発明の光点式表示器1を製造する
に際しては、まず平板状の導光板の一面にレーザー加
工、エッチング、切削加工、樹脂成形等により、図3の
ごとき裏面5と平行な面で切断した横断面形状が楕円で
深くなるほど幅径が小さくなる椀形状若しくは錐体形状
の凹部からなる反射ドット9を、図4に示すような配列
で形成する。この楕円形状の反射ドット9の長軸が、光
源4からの光の進行方向と直交するように配列すること
で、反射ドット9の長軸に沿ったラインで効率的に光源
からの光を反射して明るい表示が得られる。また、この
反射ドット9の配列を、光源4側から見て1列ごとに反
射ドット9が互い違いになるように配置することで、反
射ドットと反射ドットの隙間に無駄に光を透過させるこ
となく配列の全域に亘って効率よく反射ドット9に光を
反射させることができるものであり、また反射ドットと
反射ドットとの間の非点灯部分が線状にならずに輝度む
らのない均等な明るさの表示が得られる。
As shown in FIG. 2, the reflection dot groups 6 on both sides
1, 6 3 is positioned in a plane part, upon reflection dot groups 6 2 of the center to produce a spot-type indicator 1 of the present invention that are located in the curved surface, the first laser on one surface of a flat light guide plate Reflection dots made of bowl-shaped or cone-shaped recesses whose cross-sectional shape cut along a plane parallel to the back surface 5 as shown in FIG. 3 becomes elliptical and deeper by processing, etching, cutting, resin molding, etc. 9 are formed in an array as shown in FIG. By arranging the major axis of the elliptical reflective dots 9 so as to be orthogonal to the traveling direction of the light from the light source 4, the light from the light source can be efficiently reflected by a line along the major axis of the reflective dots 9. And a bright display is obtained. Moreover, by arranging the reflection dots 9 such that the reflection dots 9 are alternately arranged for each row when viewed from the light source 4 side, light is not transmitted through the gap between the reflection dots without waste. Light can be efficiently reflected to the reflective dots 9 over the entire area of the array, and the non-lighted portions between the reflective dots do not become linear but have uniform brightness without uneven brightness. An indication of the length is obtained.

【0010】そして、図1の「粗←→密←→粗」で示す
ように、両側の反射ドット群61、63の反射ドット9
は、平板での通常の配列密度(ピッチ)で形成し、中央
の反射ドット群62の反射ドット9の密度は、両側の反
射ドット群61、63の反射ドット9の密度よりも高密度
に、すなわち単位面積当たり多くの反射ドット9を形成
するものである。そして、この平板状の導光板を加熱
し、その中央部分を反射ドット群を内側にして撓曲する
ものである。
[0010] Then, as shown in FIG. 1 as shown in the "coarse ← → ← → dense coarse", both sides of the reflective dots group 6 1, 6 3 of reflective dots 9
Forms a normal arrangement density of a flat plate (pitch), the density of the reflective dots 9 in the center of the reflected dot groups 6 2, higher than the density of the reflective dots 9 on both sides of reflective dots group 6 1, 6 3 This is to form a large number of reflection dots 9 per density, that is, per unit area. Then, the flat light guide plate is heated, and the central portion is bent with the reflection dot group inside.

【0011】導光板を撓曲することにより、中央の反射
ドット群62の反射ドットの開口径は小径となり、両側
の反射ドット群61、63の反射ドットよりも光源からの
光の反射効率が減少して暗くなるが、本実施例にあって
はその暗くなる分を見越して、中央の反射ドット群62
の反射ドットの配列密度を予め高めて形成しておくこと
により、撓曲後に中央の反射ドット群62と両側の反射
ドット群61、63とで同程度の輝度が得られ、輝度ムラ
のない高品位な表示が得られる。
[0011] By bending the light guide plate, the opening diameter of the reflective dots in the center of the reflective dot groups 6 2 becomes small, the reflection of light from both sides the light source than the reflective dots of reflective dots group 6 1, 6 3 Although the efficiency is reduced and the image becomes darker, in the present embodiment, the central reflection dot group 6 2
By forming enhance advance the arrangement density of the reflective dots of comparable brightness is obtained at the center of the reflected dot group 6 2 and each side of the reflective dot groups 6 1, 6 3 after bending, luminance unevenness A high-quality display without any is obtained.

【0012】図5は、本発明の光点式表示器の製造方法
の第2の実施例を示しており、平板状の導光板2の一面
にレーザー加工、エッチング、切削加工、樹脂成形等に
より、横断面形状が楕円で深くなるほど幅径が小さくな
る椀形状若しくは錐体形状の凹部からなる反射ドット9
を形成するのであるが、その際、中央の反射ドット群6
2における撓曲する部分に位置する反射ドット9´につ
いては、撓曲した際に開口径が小さくなる分を見込んで
開口径を予め大径に形成するものである。すなわち、本
実施例にあっては、図5(a)に示すごとく、撓曲する
部分の反射ドット9´の長軸方向の幅径を大径にする。
そして、導光板2を加熱して撓曲することで、図5
(b)に示すごとく、撓曲部分の反射ドット9´は開口
径が小さくなり、これにより反射ドット9全体としてほ
ぼ均一な開口径になるとともに、導光板2全体として輝
度ムラのない高品位な表示が実現できる。
FIG. 5 shows a second embodiment of the method for manufacturing a light spot type display according to the present invention. One surface of the flat light guide plate 2 is formed by laser processing, etching, cutting, resin molding or the like. A reflection dot 9 composed of a bowl-shaped or a cone-shaped recess whose cross-sectional shape becomes elliptical and becomes deeper as the depth increases.
Is formed, and at that time, the central reflection dot group 6
Regarding the reflective dot 9 'located at the bent portion in FIG. 2 , the opening diameter is formed to be large in advance in anticipation of the opening diameter becoming small when bent. That is, in the present embodiment, as shown in FIG. 5A, the width of the bent portion of the reflective dot 9 'in the major axis direction is increased.
Then, the light guide plate 2 is heated and bent to obtain a structure shown in FIG.
As shown in (b), the reflective dot 9 ′ in the bent portion has a small opening diameter, whereby the reflective dot 9 as a whole has a substantially uniform opening diameter, and the light guide plate 2 as a whole has high quality without luminance unevenness. Display can be realized.

【0013】平面部分の反射ドット9の寸法・配列の一
例としては、短軸が135μmで長軸が185μm、深
さが116μm、長軸方向のピッチが500μmで短軸
方向のピッチが500μmとするものである。このよう
に反射ドット9を配置することで、反射ドット9におけ
る長軸に沿った面で多くの光を反射するとともに、表示
面(裏面)から反射ドット9を見る際の反射ドット9開
口面積が小さくなって、外部からの光が反射ドット9に
反射することによる表示体の白濁化現象を防止すること
ができる。この反射ドット9を導光板2に形成する手段
としては、レーザー加工、エッチング、切削加工、樹脂
成形等があるが、表示体の白濁化現象を防止するために
も、加工面を鏡面状にきわめて平滑にすることが必要で
あり、それからしてレーザー加工が適している。
As an example of the dimensions and arrangement of the reflection dots 9 in the plane portion, the short axis is 135 μm, the long axis is 185 μm, the depth is 116 μm, the pitch in the long axis is 500 μm, and the pitch in the short axis is 500 μm. Things. By arranging the reflective dots 9 in this manner, a large amount of light is reflected on the surface along the long axis of the reflective dots 9 and the opening area of the reflective dots 9 when the reflective dots 9 are viewed from the display surface (back surface) is reduced. As a result, it becomes possible to prevent the display body from becoming clouded due to external light being reflected by the reflective dots 9. Means for forming the reflection dots 9 on the light guide plate 2 include laser processing, etching, cutting, and resin molding. However, in order to prevent the display body from becoming clouded, the processed surface is extremely mirror-finished. Smoothing is necessary, and then laser processing is suitable.

【0014】尚、上述した実施例にあっては、撓曲する
導光板2の内側に反射ドットを形成する場合について説
明したが、これと反対に、撓曲する導光板2の外側に反
射ドットを形成する場合にも本発明を応用することがで
きる。すなわち、上述した第1の実施例を応用すると、
平板状の導光板に反射ドットを形成する際に、撓曲する
部分の反射ドットの密度を粗く形成し、また第2の実施
例を応用すると、撓曲する部分の反射ドットの開口径を
予め小径に形成するものである。そして、導光板を加熱
し撓曲することで、反射ドット全体として輝度ムラのな
い高品位な表示が実現できるものである。
In the above-described embodiment, the case where the reflection dots are formed inside the bending light guide plate 2 has been described. On the contrary, the reflection dots are formed outside the bending light guide plate 2. The present invention can also be applied to the case of forming. That is, applying the first embodiment described above,
When forming the reflection dots on the flat light guide plate, the density of the reflection dots in the bent portion is formed roughly, and when the second embodiment is applied, the opening diameter of the reflection dot in the bent portion is set in advance. It is formed into a small diameter. By heating and bending the light guide plate, it is possible to realize a high-quality display with no luminance unevenness as a whole of the reflection dots.

【0015】また上述した実施例にあっては、反射ドッ
トの横断面形状を楕円として説明したが、これ以外にも
図6に示すごとく、長円、ひょうたん形、繭形等の短軸
と長軸を有する椀形状、錐体形状、鍋底形状等であって
も同様の効果を発揮し得るものである。
In the embodiment described above, the cross section of the reflection dot is described as an ellipse. However, as shown in FIG. 6, the short axis and the long axis such as an ellipse, a gourd and a cocoon may be used. The same effect can be exhibited even in a bowl shape, a cone shape, a pan bottom shape, or the like having an axis.

【0016】[0016]

【発明の効果】以上詳述した如く、本発明の光点式表示
器の製造方法によれば、曲面を有する導光板を備える光
点式表示器において平面部分も曲面部分も一定の明るさ
で高品位な表示を得ることができる。
As described above in detail, according to the method of manufacturing a light spot type display of the present invention, in a light spot type display provided with a light guide plate having a curved surface, both a flat portion and a curved portion have constant brightness. High quality display can be obtained.

【0017】また、反射ドットは横断面形状が短軸と長
軸を有する非正円形状とするとともに、該長軸は光源か
らの光の進行方向と直交すべく配設することで、反射ド
ットの長軸に沿ったラインで効率的に光を反射して明る
い表示が得られるとともに、光源からの光を反射する反
射ドット部分の幅径を、従来の正円の直径と本発明の非
正円形状の長軸とで同一に設定した場合、表示面から反
射ドットを見る際に従来の正円形状の開口面積と比較し
て本発明の非正円形状の開口面積を小さくすることがで
き、これにより外部からの光が反射ドットに反射するこ
とによる白濁化現象を防止することができる。そして、
非点灯時に反射ドット群を視認させず点灯時のみ反射ド
ット群を表示させるという高品位な表示が得られるもの
である。
Further, the reflection dot has a non-circular cross-sectional shape having a short axis and a long axis, and the long axis is disposed so as to be orthogonal to the traveling direction of light from the light source. In addition to efficiently reflecting light in a line along the long axis of the light source to obtain a bright display, the width of the reflective dot portion reflecting light from the light source is set to the diameter of the conventional perfect circle and the non-regular shape of the present invention. When the same setting is made for the long axis of the circular shape, the non-circular opening area of the present invention can be reduced as compared with the conventional circular opening area when viewing the reflective dots from the display surface. Thus, it is possible to prevent white turbidity caused by external light reflected on the reflective dots. And
A high-quality display can be obtained in which the reflection dot group is displayed only when the light is turned on without visually recognizing the reflection dot group when the light is not turned on.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の光点式表示器を裏面からみた状態を示
す斜視図である。
FIG. 1 is a perspective view showing a light spot type display according to the present invention as viewed from the back.

【図2】本発明の光点式表示器を表面からみた状態を示
す斜視図である。
FIG. 2 is a perspective view showing the light spot type display of the present invention as viewed from the surface.

【図3】本発明の光点式表示器の反射ドットを示す説明
図である。
FIG. 3 is an explanatory view showing reflection dots of the light spot type display of the present invention.

【図4】本発明の光点式表示器の反射ドットの配列を示
す説明図である。
FIG. 4 is an explanatory diagram showing an arrangement of reflection dots of the light spot type display of the present invention.

【図5】本発明の光点式表示器の他の製造方法を示す説
明図である。
FIG. 5 is an explanatory view showing another method of manufacturing the light spot type display of the present invention.

【図6】本発明の光点式表示器の反射ドットの他の実施
例を示す説明図である。
FIG. 6 is an explanatory view showing another embodiment of the reflection dots of the light spot type display of the present invention.

【符号の説明】[Explanation of symbols]

1 光点式表示器 2 導光板 3 側面 4 光源 5 裏面 6 反射ドット群 7 表示面 8 反射テープ 9、9´ 反射ドット REFERENCE SIGNS LIST 1 light point type display 2 light guide plate 3 side surface 4 light source 5 back surface 6 reflection dot group 7 display surface 8 reflection tape 9, 9 ′ reflection dot

───────────────────────────────────────────────────── フロントページの続き Fターム(参考) 2H038 AA41 BA01 BA06 5C096 AA05 BA02 BB08 BC01 CA04 CA15 CA22 CA32 CB02 CC06 CD10 CD23 CD32 EB02 EB12 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H038 AA41 BA01 BA06 5C096 AA05 BA02 BB08 BC01 CA04 CA15 CA22 CA32 CB02 CC06 CD10 CD23 CD32 EB02 EB12

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 透光性を有し微小な凹部からなる反射ド
ットを複数形成してなる導光板の一側面に光源を配設
し、上記反射ドットに上記光源からの光を反射させて表
示を行う光点式表示器において、平板状の導光板に形成
した反射ドットの開口径が該導光板の撓曲により変化す
る変化量を見越して、反射ドットを配設する面が曲面の
内側になる場合には曲面となる部分に形成する反射ドッ
トは平面部分の反射ドットの配列間隔よりも予め高密度
に配列し、また反射ドットを配設する面が曲面の外側に
なる場合には曲面となる部分に形成する反射ドットは平
面部分の反射ドットの配列間隔よりも予め低密度に配列
して形成した後、この導光板を撓曲して曲面を形成する
ことを特徴とする光点式表示器の製造方法。
1. A light source is provided on one side surface of a light guide plate formed with a plurality of reflective dots formed of light-transmitting and minute concave portions, and light from the light source is reflected on the reflective dots for display. In the light spot type display performing the above, in consideration of the amount of change in the opening diameter of the reflection dots formed on the flat light guide plate due to the bending of the light guide plate, the surface on which the reflection dots are arranged is inside the curved surface. In such a case, the reflection dots formed on the curved portion are arranged at a higher density in advance than the arrangement interval of the reflection dots on the plane portion, and if the surface on which the reflection dots are arranged is outside the curved surface, the reflection dot is formed as a curved surface. The reflection dots to be formed in the portion formed are arranged in advance at a lower density than the arrangement interval of the reflection dots in the plane portion, and then the light guide plate is bent to form a curved surface. Method of manufacturing the vessel.
【請求項2】 透光性を有し微小な凹部からなる反射ド
ットを複数形成してなる導光板の一側面に光源を配設
し、上記反射ドットに上記光源からの光を反射させて表
示を行う光点式表示器において、平板状の導光板に形成
した反射ドットの開口径が該導光板の撓曲により変化す
る変化量を見越して、反射ドットを配設する面が曲面の
内側になる場合には曲面となる部分に形成する反射ドッ
トは平面部分の反射ドットの開口径よりも予め大径と
し、また反射ドットを配設する面が曲面の外側になる場
合には曲面となる部分に形成する反射ドットは平面部分
の反射ドットの開口径よりも予め小径として形成した
後、この導光板を撓曲して曲面を形成することを特徴と
する光点式表示器の製造方法。
2. A light source is provided on one side of a light guide plate formed with a plurality of reflective dots formed of minute concave portions having a light transmitting property, and light from the light source is reflected on the reflective dots for display. In the light spot type display performing the above, in consideration of the amount of change in the opening diameter of the reflection dots formed on the flat light guide plate due to the bending of the light guide plate, the surface on which the reflection dots are arranged is inside the curved surface. In such a case, the reflection dot formed on the curved portion is made larger in diameter than the opening diameter of the reflection dot on the flat portion, and the curved portion is formed when the surface on which the reflection dot is disposed is outside the curved surface. The method of manufacturing a light spot type display, characterized in that the reflection dots to be formed are formed beforehand with a diameter smaller than the opening diameter of the reflection dots in the plane portion, and then the light guide plate is bent to form a curved surface.
【請求項3】 反射ドットは横断面形状が短軸と長軸を
有する非正円形状とするとともに、該長軸は光源からの
光の進行方向と直交すべく配設したことを特徴とする請
求項1又は2記載の光点式表示器の製造方法。
3. The reflection dot is characterized in that the cross-sectional shape is a non-circular shape having a short axis and a long axis, and the long axis is arranged to be orthogonal to the traveling direction of light from the light source. A method for manufacturing a light spot type display according to claim 1.
JP2001098557A 2001-03-30 2001-03-30 Method for manufacturing light spot type display device Pending JP2002297071A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001098557A JP2002297071A (en) 2001-03-30 2001-03-30 Method for manufacturing light spot type display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001098557A JP2002297071A (en) 2001-03-30 2001-03-30 Method for manufacturing light spot type display device

Publications (1)

Publication Number Publication Date
JP2002297071A true JP2002297071A (en) 2002-10-09

Family

ID=18952196

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001098557A Pending JP2002297071A (en) 2001-03-30 2001-03-30 Method for manufacturing light spot type display device

Country Status (1)

Country Link
JP (1) JP2002297071A (en)

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