JPH04355408A - Light conductive plate for surface emission device and manufacture thereof - Google Patents
Light conductive plate for surface emission device and manufacture thereofInfo
- Publication number
- JPH04355408A JPH04355408A JP3157519A JP15751991A JPH04355408A JP H04355408 A JPH04355408 A JP H04355408A JP 3157519 A JP3157519 A JP 3157519A JP 15751991 A JP15751991 A JP 15751991A JP H04355408 A JPH04355408 A JP H04355408A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light guide
- emitting device
- guide plate
- light conductive
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 16
- 238000000465 moulding Methods 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 6
- 238000009792 diffusion process Methods 0.000 abstract description 5
- 239000000377 silicon dioxide Substances 0.000 abstract description 3
- 239000004925 Acrylic resin Substances 0.000 abstract description 2
- 229920000178 Acrylic resin Polymers 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 238000000149 argon plasma sintering Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009760 electrical discharge machining Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、高輝度の面発光が得ら
れる面発光装置用導光板とその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light guide plate for a surface emitting device capable of emitting high-intensity surface light emission, and a method for manufacturing the same.
【０００２】0002
【従来の技術】従来、面発光装置用導光板は、平滑な表
面を有する導光体１の下面に光拡散透過部パターン６が
形成されていた（図５参照）。光拡散透過部パターン６
は、線光源２の近傍には小さい面積の光拡散透過部が形
成されて線光源２より照射された光の一部を散乱して導
光体１上面に導き、線光源２から遠い部分には大きい面
積の光拡散透過部が形成されて導光体１内部で全反射を
繰り返してきた光の大部分を散乱して導光体１表面に導
いていた。2. Description of the Related Art Conventionally, a light guide plate for a surface emitting device has a light diffusing and transmitting pattern 6 formed on the lower surface of a light guide 1 having a smooth surface (see FIG. 5). Light diffusion transmitting part pattern 6
A light diffusing and transmitting part with a small area is formed near the linear light source 2, scattering a part of the light emitted from the linear light source 2, guiding it to the upper surface of the light guide 1, and dispersing it to a part far from the linear light source 2. A light diffusing and transmitting portion with a large area was formed, and most of the light that had been repeatedly totally reflected inside the light guide 1 was scattered and guided to the surface of the light guide 1.
【０００３】0003
【発明が解決しようとする課題】しかし、光拡散透過部
の受光面が、導光体１の表裏面に水平な面だけであるた
め、光拡散透過部で受光できる光線の量が限られて、低
い輝度の面発光しか得られなかった。また、光拡散透過
部と導光体表面との距離が長いので、光拡散透過部で散
乱反射された光線の導光体上面からの出光効率が悪かっ
た。[Problem to be Solved by the Invention] However, since the light receiving surface of the light diffusing and transmitting section is only a surface that is parallel to the front and back surfaces of the light guide 1, the amount of light that can be received by the light diffusing and transmitting section is limited. However, only low brightness surface emission could be obtained. Furthermore, since the distance between the light diffusing and transmitting section and the surface of the light guide was long, the light beams scattered and reflected by the light diffusing and transmitting section were not efficiently emitted from the top surface of the light guide.
【０００４】したがって、本発明の目的は、光拡散透過
部の受光側の表面積を増加することにより多くの光線を
受光でき、また光拡散透過部で散乱反射された光線を効
率よく導光体上面から出光させて高輝度の面発光が得ら
れる面発光装置用導光板とその製造方法を提供すること
である。Therefore, an object of the present invention is to increase the surface area of the light-receiving side of the light-diffusing and transmitting portion so that more light rays can be received, and to efficiently transfer the light rays that have been scattered and reflected by the light-diffusing and transmitting portion to the upper surface of the light guide. It is an object of the present invention to provide a light guide plate for a surface emitting device that can emit light from the surface to obtain high-intensity surface light emission, and a method for manufacturing the same.
【０００５】[0005]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明の面発光装置用導光板は、導光体の下面に
形成された凹部パターンに、光拡散透過物質が設置さる
ように構成した。[Means for Solving the Problems] In order to achieve the above object, the light guide plate for a surface emitting device of the present invention is provided such that a light diffusing and transmitting material is installed in a concave pattern formed on the lower surface of the light guide. It was configured as follows.
【０００６】また、本発明の面発光装置用導光板の製造
方法は、面発光装置用導光板に形成される光拡散透過部
パターンに対応するパターンの凸部が形成されたキャビ
ティを有する金型を用いて、導光体を成形し、該導光体
の下面に形成された凹部パターンに光拡散透過物質を設
置して面発光装置用導光板を得るように構成した。[0006] The method for manufacturing a light guide plate for a surface emitting device according to the present invention also includes a mold having a cavity in which a convex portion of a pattern corresponding to the light diffusing and transmitting portion pattern to be formed on the light guide plate for a surface emitting device is formed. A light guide plate for a surface emitting device was obtained by molding a light guide using the following method, and installing a light diffusing and transmitting material in a concave pattern formed on the lower surface of the light guide.
【０００７】以下、本発明を図を用いてさらに詳しく説
明する。図１は本発明の面発光装置用導光板の一実施例
を示す断面図、図２は本発明の面発光装置用導光板の他
の実施例を示す断面図、図３〜図４は図１の面発光装置
用導光板の製造方法の実施例を示す断面図である。１は
導光体、２は凹部パターン、３は光拡散透過物質、４は
金型、５は凸部をそれぞれ示す。[0007] The present invention will be explained in more detail below with reference to the drawings. FIG. 1 is a sectional view showing one embodiment of the light guide plate for a surface emitting device according to the present invention, FIG. 2 is a sectional view showing another embodiment of the light guide plate for a surface emitting device according to the present invention, and FIGS. FIG. 1 is a cross-sectional view showing an example of the method for manufacturing a light guide plate for a surface emitting device according to No. 1; 1 is a light guide, 2 is a concave pattern, 3 is a light diffusing and transmitting material, 4 is a mold, and 5 is a convex portion.
【０００８】導光体１は、下面に凹部パターンを有する
樹脂板で、厚さ１〜３０ｍｍ程度の透明な長方形板材が
好ましい（図４参照）。導光体１の材料としては、アク
リル・ポリカーボネート・ポリ塩化ビニルなどの樹脂を
用いるとよい。The light guide 1 is preferably a transparent rectangular resin plate having a concave pattern on its lower surface and having a thickness of about 1 to 30 mm (see FIG. 4). As the material for the light guide 1, resins such as acrylic, polycarbonate, and polyvinyl chloride may be used.
【０００９】導光体１を製造するには、次のような金型
４を用いて成形する。金型４は、光拡散透過部パターン
に対応するパターンの凸部５が形成されたキャビティを
有している（図３参照）。凸部５は、半球状、直方体状
など任意の形状で形成される。凸部５の形成方法として
は、放電加工、レーザー加工、彫刻やエッチングなどが
ある。とくに、エッチング法は、グラデーションパター
ンの形成が簡単にできるため好ましい。[0009] To manufacture the light guide 1, the following mold 4 is used. The mold 4 has a cavity in which a convex portion 5 having a pattern corresponding to the light diffusing/transmitting portion pattern is formed (see FIG. 3). The convex portion 5 is formed in any shape such as a hemisphere or a rectangular parallelepiped. Methods for forming the convex portions 5 include electrical discharge machining, laser machining, engraving, and etching. In particular, the etching method is preferable because it allows easy formation of a gradation pattern.
【００１０】光拡散透過物質３は、凹部パターン２に設
置されている（図１〜図２参照）。光拡散透過物質３の
材料としては、炭酸カルシウムまたはシリカなどの導光
体１の屈折率とほぼ同じかそれ以下の粒子状透明物質を
含有するインキが用いられる。また、凹部パターン２へ
光拡散透過物質３を設置する方法としては、スクリーン
印刷などの印刷法、あるいは転写法などの手段が用いら
れる。The light diffusing and transmitting material 3 is placed in the concave pattern 2 (see FIGS. 1 and 2). As a material for the light diffusing and transmitting material 3, an ink containing a particulate transparent material such as calcium carbonate or silica having a refractive index substantially equal to or lower than the refractive index of the light guide 1 is used. Further, as a method for installing the light diffusing and transmitting material 3 in the concave pattern 2, a printing method such as screen printing, a transfer method, or the like is used.
【００１１】[0011]
【作用】上記構成の面発光装置用導光板の側面に線光源
２を配置すると、線光源２から照射された光線は導光体
１内部で入射角と反射角とが等しく全反射を繰り返す一
方、光線は光拡散透過部で散乱反射されて上面側へ導か
れる。[Operation] When the linear light source 2 is placed on the side surface of the light guide plate for a surface emitting device having the above structure, the light rays irradiated from the linear light source 2 undergo repeated total reflection inside the light guide 1 with an equal angle of incidence and an angle of reflection. , the light beam is scattered and reflected by the light diffusing and transmitting section and guided to the upper surface side.
【００１２】また、導光体１裏面に光散乱反射板を配置
すると、光拡散透過部を透過した光線も光散乱反射板で
反射して間接的に導光体１上面側に導かれる。Furthermore, when a light scattering/reflecting plate is arranged on the back surface of the light guide 1, the light beams that have passed through the light diffusing/transmitting section are also reflected by the light scattering/reflecting plate and are indirectly guided to the upper surface of the light guide 1.
【００１３】本発明の構成により、光拡散透過部の受光
面積が増加し従来より多くの光線を受光できるため、散
乱反射されて導光体１上面側へ導かれる光線も増えて導
光体１表面の輝度が高くなる。また、光拡散透過部と導
光板１上面との距離が短くなるため、散乱反射された光
線の出光効率がよくなる。With the configuration of the present invention, the light-receiving area of the light-diffusing and transmitting portion is increased and more light rays can be received than before, so the number of light rays that are scattered and reflected and guided toward the upper surface of the light guide 1 increases. The surface brightness increases. Furthermore, since the distance between the light diffusing and transmitting portion and the upper surface of the light guide plate 1 is shortened, the light output efficiency of the scattered and reflected light rays is improved.
【００１４】[0014]
【実施例】面発光装置用導光板に形成される光拡散透過
部パターンに対応するパターンの凸部が形成されたキャ
ビティを有する金型を用いて、アクリル樹脂を射出して
縦２５０ｍｍ、横１８０ｍｍ、厚さ３ｍｍの透明な長方
形板材導光体を成形した。導光体の下面に形成された凹
部パターンに、シリカを含有するインキを光拡散透過物
質として設置して面発光装置用導光板を得た。[Example] Acrylic resin is injected using a mold having a cavity in which a convex part with a pattern corresponding to the light diffusing and transmitting part pattern formed on a light guide plate for a surface emitting device is formed, and the length is 250 mm and the width is 180 mm. A transparent rectangular plate light guide with a thickness of 3 mm was molded. A light guide plate for a surface emitting device was obtained by installing ink containing silica as a light diffusing and transmitting material in a concave pattern formed on the lower surface of the light guide.
【００１５】このようにして得られた面発光装置用導光
板の側面に線光源を配置したところ、光拡散透過部の受
光面が凸部で形成されて受光面積が大きいため、高輝度
の面発光が得られた。When a linear light source was placed on the side surface of the light guide plate for a surface light emitting device obtained in this way, the light receiving surface of the light diffusing and transmitting portion was formed by a convex portion and the light receiving area was large, so that a high brightness surface was formed. Luminescence was obtained.
【００１６】[0016]
【発明の効果】本発明の面発光装置用導光板は、導光体
の下面に形成された凹部パターンに、光拡散透過物質が
充填さるように構成した。Effects of the Invention The light guide plate for a surface emitting device of the present invention is constructed such that the concave pattern formed on the lower surface of the light guide is filled with a light diffusing and transmitting material.
【００１７】また、本発明の面発光装置用導光板の製造
方法は、面発光装置用導光板に形成される光拡散透過部
パターンに対応するパターンの凸部が形成されたキャビ
ティを有する金型を用いて、導光体を成形し、該導光体
の下面に形成された凹部パターンに光拡散透過物質を充
填して面発光装置用導光板を得るように構成した。Further, the method for manufacturing a light guide plate for a surface emitting device according to the present invention includes a mold having a cavity in which a convex portion of a pattern corresponding to the light diffusing and transmitting portion pattern to be formed on the light guide plate for a surface emitting device is formed. A light guide plate for a surface emitting device was obtained by molding a light guide using the following method, and filling a light diffusing and transmitting material into a concave pattern formed on the lower surface of the light guide.
【００１８】したがって、光拡散透過部の受光面が凸部
で形成されて受光面積が大きいため、高輝度の面発光が
得られる。また、光拡散透過部と導光板１上面との距離
が短くなるため、散乱反射された光線の出光効率がよく
なる。[0018] Therefore, since the light receiving surface of the light diffusing and transmitting portion is formed of convex portions and the light receiving area is large, high-intensity surface light emission can be obtained. Furthermore, since the distance between the light diffusing and transmitting portion and the upper surface of the light guide plate 1 is shortened, the light output efficiency of the scattered and reflected light rays is improved.
【図１】本発明の面発光装置用導光板の一実施例を示す
断面図である。FIG. 1 is a sectional view showing one embodiment of a light guide plate for a surface emitting device of the present invention.
【図２】本発明の面発光装置用導光板の他の実施例を示
す断面図である。FIG. 2 is a sectional view showing another embodiment of the light guide plate for a surface emitting device of the present invention.
【図３】図１の面発光装置用導光板の製造方法の一実施
例を示す断面図である。FIG. 3 is a sectional view showing an example of a method for manufacturing the light guide plate for the surface emitting device shown in FIG. 1;
【図４】図１の面発光装置用導光板の製造方法の一実施
例を示す断面図である。4 is a cross-sectional view showing an example of a method for manufacturing the light guide plate for the surface emitting device shown in FIG. 1. FIG.
【図５】従来の面発光装置用導光板の一実施例を示す断
面図である。FIG. 5 is a sectional view showing an example of a conventional light guide plate for a surface emitting device.
１ 導光板 ２ 凹部パターン ３ 光拡散透過部 ４ 金型 ５ 凸部 ６ 光拡散透過部パターン 1 Light guide plate 2 Recess pattern 3 Light diffusion transmitting part 4 Mold 5 Convex part 6 Light diffusion transmission pattern
Claims (2)
ンに、光拡散透過物質が設置されたことを特徴とする面
発光装置用導光板。1. A light guide plate for a surface emitting device, characterized in that a light diffusing and transmitting material is placed in a concave pattern formed on the lower surface of the light guide.
散透過部パターンに対応するパターンの凸部が形成され
たキャビティを有する金型を用いて、導光体を成形し、
該導光体の下面に形成された凹部パターンに光拡散透過
物質を設置して面発光装置用導光板を得ることを特徴と
する面発光装置用導光板の製造方法。2. Molding a light guide using a mold having a cavity in which a convex part of a pattern corresponding to the light diffusing and transmitting part pattern formed on a light guide plate for a surface emitting device is formed,
A method for manufacturing a light guide plate for a surface emitting device, the method comprising obtaining a light guide plate for a surface emitting device by installing a light diffusing and transmitting material in a concave pattern formed on the lower surface of the light guide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03157519A JP3105296B2 (en) | 1991-05-31 | 1991-05-31 | Light guide plate for surface light emitting device and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03157519A JP3105296B2 (en) | 1991-05-31 | 1991-05-31 | Light guide plate for surface light emitting device and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04355408A true JPH04355408A (en) | 1992-12-09 |
| JP3105296B2 JP3105296B2 (en) | 2000-10-30 |
Family
ID=15651449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03157519A Expired - Fee Related JP3105296B2 (en) | 1991-05-31 | 1991-05-31 | Light guide plate for surface light emitting device and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3105296B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1299130C (en) * | 2005-01-14 | 2007-02-07 | 陈健 | Method for producing light board, used equipment and produced light board |
| USRE41995E1 (en) | 1994-08-29 | 2010-12-14 | Enplas Corporation | Tapered light guide plate for surface light source device and method of making by injection molding via supplementary cavity |
-
1991
- 1991-05-31 JP JP03157519A patent/JP3105296B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE41995E1 (en) | 1994-08-29 | 2010-12-14 | Enplas Corporation | Tapered light guide plate for surface light source device and method of making by injection molding via supplementary cavity |
| CN1299130C (en) * | 2005-01-14 | 2007-02-07 | 陈健 | Method for producing light board, used equipment and produced light board |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3105296B2 (en) | 2000-10-30 |
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