JP3105296B2 - Light guide plate for surface light emitting device and method of manufacturing the same - Google Patents
Light guide plate for surface light emitting device and method of manufacturing the sameInfo
- Publication number
- JP3105296B2 JP3105296B2 JP03157519A JP15751991A JP3105296B2 JP 3105296 B2 JP3105296 B2 JP 3105296B2 JP 03157519 A JP03157519 A JP 03157519A JP 15751991 A JP15751991 A JP 15751991A JP 3105296 B2 JP3105296 B2 JP 3105296B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- light guide
- emitting device
- guide plate
- light emitting
- 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 - Fee Related
Links
Landscapes
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Optical Elements Other Than Lenses (AREA)
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 light emitting device capable of obtaining high luminance surface light emission and a method of 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, in a light guide plate for a surface light emitting device, a light diffusion / transmission portion pattern 6 is formed on the lower surface of a light guide 1 having a smooth surface (see FIG. 5). Light diffusion transmission part pattern 6
A light diffusion transmitting portion having a small area is formed in the vicinity of the line light source 2 to scatter a part of the light emitted from the line light source 2 and guide it to the upper surface of the light guide 1, and to a portion far from the line light source 2 The light diffusion / transmission portion having a large area is formed, and most of the light that has been repeatedly totally reflected inside the light guide 1 is 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。However, since the light-receiving surface of the light-diffusing and transmitting portion is only a surface horizontal to the front and back surfaces of the light guide 1, the amount of light rays that can be received by the light-diffusing and transmitting portion is limited. And only low-luminance surface emission was obtained. Further, since the distance between the light diffusion transmission portion and the light guide surface is long, the efficiency of light emitted from the light guide upper surface of the light beam scattered and reflected by the light diffusion transmission portion is poor.
【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。Accordingly, an object of the present invention is to increase the surface area on the light receiving side of the light diffusion transmission portion so that a large amount of light can be received, and the light scattered and reflected by the light diffusion transmission portion can be efficiently reflected on the upper surface of the light guide. To provide a light-guiding plate for a surface-emitting device, which can emit light from the surface to obtain high-luminance surface light, and a method for manufacturing the same.
【０００５】[0005]
【課題を解決するための手段】上記目的を解決するため
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、導光体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からなる光
拡散透過物質が設置されるように構成した。In order to achieve the above object, a light guide plate for a surface light emitting device according to the present invention comprises a concave pattern formed on a lower surface of a light guide and having a refractive index substantially equal to that of the light guide. The light-diffusing and transmitting material composed of an ink containing a transparent material having a particle size equal to or less than that is provided.
【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導光体の屈折率とほ
ぼ同じかそれ以下の粒子状透明物質を含有するインキか
らなる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。Further, according to the method of manufacturing a light guide plate for a surface light emitting device of the present invention, a mold having a cavity in which a convex portion of a pattern corresponding to a light diffusion / transmission portion pattern formed on a light guide plate for a surface light emitting device is formed. And forming a light guide, and forming a concave pattern formed on the lower surface of the light guide into a light diffusion transmission made of an ink containing a particulate transparent substance substantially equal to or less than the refractive index of the light guide. The material was installed to obtain a light guide plate for a surface light emitting device.
【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。Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 is a sectional view showing one embodiment of the light guide plate for a surface light emitting device of the present invention, FIG. 2 is a sectional view showing another embodiment of the light guide plate for a surface light emitting device of the present invention, and FIGS. It is sectional drawing which shows the Example of the manufacturing method of the light guide plate for surface light-emitting devices of No. 1. 1 is a light guide, 2 is a concave pattern, 3 is a light diffusing and transmitting substance, 4 is a mold, and 5 is a convex part.
【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 a resin plate having a concave pattern on the lower surface, and is preferably a transparent rectangular plate having a thickness of about 1 to 30 mm (see FIG. 4). As a material for the light guide 1, a resin such as acrylic, polycarbonate, or 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。In order to manufacture the light guide 1, the light guide 1 is molded using a mold 4 as described below. The mold 4 has a cavity in which a convex portion 5 of a pattern corresponding to the light diffusion / transmission portion pattern is formed (see FIG. 3). The convex portion 5 is formed in an arbitrary shape such as a hemisphere or a rectangular parallelepiped. Examples of the method for forming the convex portion 5 include electric discharge machining, laser machining, engraving, etching, and the like. In particular, the etching method is preferable because a gradation pattern can be easily formed.
【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 provided in the concave pattern 2 (see FIGS. 1 and 2). As a material of the light diffusion and transmission material 3, an ink containing a particulate transparent material such as calcium carbonate or silica having a refractive index substantially equal to or less than the refractive index of the light guide 1 is used. In addition, as a method of installing the light diffusion and transmission material 3 in the concave pattern 2, a printing method such as screen printing or a transfer method 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。When the line light source 2 is disposed on the side surface of the light guide plate for a surface light emitting device having the above structure, the light emitted from the line light source 2 has the same incident angle and the same reflection angle inside the light guide 1 and repeats total reflection. The light rays are scattered and reflected by the light diffusion / transmission portion and are 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。When a light scattering reflector is disposed on the back surface of the light guide 1, the light transmitted through the light diffusing and transmitting portion is also reflected by the light scattering reflector and is 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。According to the configuration of the present invention, the light receiving area of the light diffusing and transmitting portion is increased and more light can be received than in the prior art, so that the number of light that is scattered and reflected and guided to the upper surface of the light guide 1 also increases. The brightness of the surface increases. In addition, since the distance between the light diffusion transmission portion and the upper surface of the light guide plate 1 is reduced, the light output efficiency of the scattered and reflected light 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 A 250 mm long, 180 mm wide acrylic resin was injected using a mold having a cavity in which a convex portion of a pattern corresponding to the light diffusion transmitting portion pattern formed on the light guide plate for a surface light emitting device was formed. A transparent rectangular plate light guide having a thickness of 3 mm was formed. An ink containing silica was provided as a light diffusion and transmission material in a concave pattern formed on the lower surface of the light guide to obtain a light guide plate for a surface light emitting device.
【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 is arranged on the side surface of the light guide plate for a surface light emitting device obtained as described above, the light receiving surface of the light diffusing / transmitting portion is formed of a convex portion and the light receiving area is large. 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。The light guide plate for a surface light emitting device according to the present invention has a structure in which a concave pattern formed on the lower surface of a light guide is filled with a light diffusing and transmitting substance.
【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, according to the method of manufacturing a light guide plate for a surface light emitting device of the present invention, a mold having a cavity in which a convex portion of a pattern corresponding to a light diffusion / transmission portion pattern formed on the light guide plate for a surface light emitting device is formed. , A light guide is formed, and a concave pattern formed on the lower surface of the light guide is filled with a light diffusing and transmitting substance to obtain a light guide plate for a surface light emitting device.
【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。Therefore, since the light receiving surface of the light diffusion transmitting portion is formed by the convex portion and the light receiving area is large, surface light emission with high luminance can be obtained. In addition, since the distance between the light diffusion transmission portion and the upper surface of the light guide plate 1 is reduced, the light output efficiency of the scattered and reflected light 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 light 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 light 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 cross-sectional view showing one embodiment of a method for manufacturing the light guide plate for a surface emitting device of FIG.
【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。FIG. 4 is a cross-sectional view showing one embodiment of a method for manufacturing the light guide plate for the surface light emitting device of 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 light emitting device.
【符号の説明】 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[Explanation of Signs] 1 light guide plate 2 concave pattern 3 light diffusion / transmission part 4 mold 5 convex part 6 light diffusion / transmission part pattern
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G02B 6/00 F21V 8/00 G02F 1/13357 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) G02B 6/00 F21V 8/00 G02F 1/13357
Claims (2)
に、導光体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からなる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 diffusing and transmitting material made of ink containing a particulate transparent material substantially equal to or less than a refractive index of a light guide is provided in a concave pattern formed on a lower surface of the light guide. A light guide plate for a surface light emitting device, comprising:
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導光体の屈折
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
ンキからなる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. A light guide is formed using a mold having a cavity in which a convex portion of a pattern corresponding to a light diffusion / transmission portion pattern formed on a light guide plate for a surface light emitting device is formed. Light guide refraction due to concave pattern formed on the lower surface of the body
A method for producing a light guide plate for a surface light emitting device, comprising installing a light diffusing and transmitting material made of an ink containing a particulate transparent material having a rate substantially equal to or less than that, to obtain a light guide plate for a surface light emitting device.
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 JPH04355408A (en) | 1992-12-09 |
| JP3105296B2 true 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) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0868910A (en) | 1994-08-29 | 1996-03-12 | Enplas Corp | Light transmission plate for surface light source and its production |
| CN1299130C (en) * | 2005-01-14 | 2007-02-07 | 陈健 | Method for producing light board, used equipment and produced light board |
-
1991
- 1991-05-31 JP JP03157519A patent/JP3105296B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04355408A (en) | 1992-12-09 |
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