JP2003227943A - Waveguide body and light source device using the same - Google Patents
Waveguide body and light source device using the sameInfo
- Publication number
- JP2003227943A JP2003227943A JP2002340536A JP2002340536A JP2003227943A JP 2003227943 A JP2003227943 A JP 2003227943A JP 2002340536 A JP2002340536 A JP 2002340536A JP 2002340536 A JP2002340536 A JP 2002340536A JP 2003227943 A JP2003227943 A JP 2003227943A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light guide
- light source
- acrylic resin
- source 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.)
- Pending
Links
Landscapes
- Light Guides In General And Applications Therefor (AREA)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、導光体に関する。
さらに該導光体に光源からの光を入射して光出射部から
光を出射する光源装置に関する。なかでも各種ディスプ
レイの光源、液晶表示セルのバックライト装置に適した
これらのものに関する。TECHNICAL FIELD The present invention relates to a light guide.
Further, the present invention relates to a light source device that allows light from a light source to enter the light guide and emits the light from a light emitting portion. In particular, the present invention relates to those suitable for light sources for various displays and backlight devices for liquid crystal display cells.
【０００２】[0002]
【従来の技術】従来から、薄型の看板、表示装置、照明
器具、液晶表示装置の背面光源等に用いられる光源装置
として、導光体に光源からの光を入射して発光させる装
置、及び該装置に用いる導光体については幾多の提案が
あり、例えば特許文献１（実公昭５８−４６４４７号公
報）、特許文献２（特開平０５−２３２４６７号公
報）、特許文献３（特開平０６−１６０６３７号公報）
などがある。これらの光源装置は、輝度の均一さを損な
うことなく発光面輝度を上げるため、導光板表面に粒子
を混入した透明樹脂を塗布したもの、あるいは、導光板
の裏面にドット印刷したり、表面の微細な凹凸をつける
加工といった改良が主で導光体そのものの材料特性を改
良するものではなかった。2. Description of the Related Art Conventionally, as a light source device used for a thin signboard, a display device, a lighting fixture, a back light source of a liquid crystal display device, or the like, a device for allowing light from a light source to enter a light guide to emit light, and There are many proposals for a light guide used in the device, for example, Patent Document 1 (Japanese Utility Model Publication No. 58-46447), Patent Document 2 (Japanese Patent Application Laid-Open No. 05-232467), and Patent Document 3 (Japanese Patent Application Laid-Open No. 06-160637). Issue)
and so on. In these light source devices, in order to increase the brightness of the light emitting surface without impairing the uniformity of brightness, a transparent resin mixed with particles is applied to the surface of the light guide plate, or dot printing is performed on the back surface of the light guide plate, or Improvements such as processing to make fine irregularities were the main ones, and did not improve the material properties of the light guide itself.
【０００３】[0003]
【特許文献１】 実公昭５８−０４６４４７号公報[Patent Document 1] Japanese Utility Model Publication No. 58-046447
【特許文献２】 特開平０５−２３２４６７号公報[Patent Document 2] Japanese Patent Laid-Open No. 05-232467
【特許文献３】 特開平０６−１６０６３７号公報[Patent Document 3] Japanese Patent Laid-Open No. 06-160637
【特許文献４】 特開平０７−１２６３０８号公報[Patent Document 4] Japanese Patent Laid-Open No. 07-126308
【０００４】[0004]
【発明が解決しようとする課題】この導光体の材料とし
ては、それを用いた光源装置の軽量化の要望からアクリ
ル系樹脂が一般的に用いられている。As a material for the light guide, an acrylic resin is generally used in order to reduce the weight of a light source device using the light guide.
【０００５】一般的にアクリル系樹脂は懸濁重合、乳化
重合、塊状重合により得られるが、何れの重合法におい
てもメタクリル酸メチルを主体とするモノマー成分に少
なからず可視光域の波長の光を吸収する不純物が含まれ
ている他、サブミクロンからミクロンオーダーの異物が
混入していることが多い。また懸濁重合および乳化重合
で得られたアクリル系樹脂には、一般的に懸濁安定剤、
乳化剤のごとき不純物が残留する。さらにアクリル系樹
脂には耐候性を賦与する目的から紫外線吸収剤を、また
その成型品のエッジカラーを改善する目的から青色系の
染料をｐｐｂのオーダーで添加されるのが一般的であ
る。これらアクリル系樹脂中に含まれる不純物等は該ア
クリル系樹脂の光学的性質、つまり光の透過性なかでも
可視光の光線透過率を低下せしめる。Generally, an acrylic resin is obtained by suspension polymerization, emulsion polymerization, or bulk polymerization. In any of the polymerization methods, a monomer component mainly containing methyl methacrylate is not a little exposed to light having a wavelength in the visible light region. In addition to containing impurities to be absorbed, foreign matter of submicron to micron order is often mixed. Acrylic resins obtained by suspension polymerization and emulsion polymerization generally include a suspension stabilizer,
Impurities such as emulsifiers remain. Further, it is common to add an ultraviolet absorber to the acrylic resin for the purpose of imparting weather resistance, and a blue dye on the order of ppb for the purpose of improving the edge color of the molded product. Impurities and the like contained in these acrylic resins reduce the optical properties of the acrylic resin, that is, the light transmittance of visible light among the light transmittance.
【０００６】そこで本発明では可視光の透過損失の少な
いアクリル系樹脂からなる導光板、および該導光板を用
いた輝度の高いバックライト用の光源装置を提供するも
のである。Therefore, the present invention provides a light guide plate made of an acrylic resin having a small visible light transmission loss, and a light source device for a backlight having high brightness using the light guide plate.
【０００７】[0007]
【課題を解決するための手段】本発明は、ポアサイズが
０．４μｍ以下のフィルターで濾過した原料モノマーを
重合して得られたアクリル系樹脂からなる導光体であっ
て、該アクリル系樹脂の２５０ｍｍの光路長で測定され
た４００ｎｍの波長の光の透過率が７５％以上であり、
かつ３８０ｎｍ〜７８０ｎｍの平均の光線透過率が８５
％以上であることを特徴とする導光体である。また、該
導光体に原光源からの光を入射し、光出射部から光を出
射する光源装置である。The present invention is a light guide body made of an acrylic resin obtained by polymerizing a raw material monomer filtered through a filter having a pore size of 0.4 μm or less, wherein the acrylic resin The transmittance of light having a wavelength of 400 nm measured with an optical path length of 250 mm is 75% or more,
And the average light transmittance of 380 nm to 780 nm is 85.
% Or more, which is a light guide. Further, it is a light source device in which the light from the original light source is incident on the light guide and the light is emitted from the light emitting portion.
【０００８】[0008]
【発明の実施の形態】本発明におけるアクリル系樹脂と
は、メタアクリル酸メチルを主成分とする単量体を重合
して得られるものである。BEST MODE FOR CARRYING OUT THE INVENTION The acrylic resin in the present invention is obtained by polymerizing a monomer containing methyl methacrylate as a main component.
【０００９】本発明における導光体とは、光源からの光
を入射することによって、所定の位置、方向に発光する
ものであり、その形状としては、一般的に板状のもので
あり、押出成形あるいは射出成形といった溶融成形によ
り形成される。The light guide in the present invention is a member which emits light in a predetermined position and direction when light from a light source is incident, and its shape is generally plate-like, and extruded. It is formed by melt molding such as molding or injection molding.
【００１０】本発明における導光体の光学特性として、
２５０ｍｍの光路長で測定される４００ｎｍの波長にお
ける光の透過率は７５％以上、かつ３８０ｎｍ〜７８０
ｎｍの平均の光線透過率が８５％以上である。４００ｎ
ｍにおける光の透過率が７５％未満では即ち冷陰極管か
ら出射される光の内４００ｎｍ前後の波長域の光が吸収
されることとなり、光源装置として導光体から出射され
る光の量が少なくなるために好ましくない。また３８０
ｎｍ〜７８０ｎｍにおける平均の光線透過率が８５％未
満では即ち冷陰極管から出射される可視光波長域の光が
吸収されることとなり、結局導光体から出射される光の
量が少なくなるために好ましくない。As the optical characteristics of the light guide according to the present invention,
The light transmittance at a wavelength of 400 nm measured with an optical path length of 250 mm is 75% or more, and 380 nm to 780 nm.
The average light transmittance of nm is 85% or more. 400n
When the light transmittance at m is less than 75%, that is, the light in the wavelength range around 400 nm of the light emitted from the cold cathode tube is absorbed, and the amount of light emitted from the light guide device as the light source device is reduced. It is not preferable because it decreases. Again 380
If the average light transmittance in the range of nm to 780 nm is less than 85%, that is, light in the visible light wavelength range emitted from the cold cathode tube is absorbed, and the amount of light emitted from the light guide body is reduced in the end. Not good for
【００１１】該導光体のアクリル系樹脂の２５０ｍｍの
光路長で測定された４００ｎｍの波長の光の透過率が７
５％以上とするためには、該アクリル系樹脂がその波長
に対して光学的に均質であること即ち少なくともその波
長より大きく屈折率を異にする物質を実質的に含まない
ことに加え、通常アクリル系樹脂に添加される紫外線吸
収剤あるいはフェノール系酸化防止剤のごとき該波長の
光を吸収する物質を実質的に含まないように該アクリル
系樹脂を重合・調製せしめることにより達成できる。The acrylic resin of the light guide has a transmittance of 7 at a wavelength of 400 nm measured with an optical path length of 250 mm.
In order to make it 5% or more, in addition to the fact that the acrylic resin is optically homogeneous with respect to its wavelength, that is, it does not substantially contain at least a substance having a refractive index different from that wavelength, This can be achieved by polymerizing and preparing the acrylic resin so that it does not substantially contain a substance that absorbs light of the wavelength such as an ultraviolet absorber or a phenolic antioxidant added to the acrylic resin.
【００１２】該アクリル系樹脂に可視光波長より大きい
異物を実質的に含まないようにするためには塊状重合に
おいては重合に用いる原料モノマー等をポアサイズが
０．４μｍ以下のフィルターで濾過したものを用いるこ
とにより達成することができる。また懸濁重合、乳化重
合のごとき分散媒体中で分散剤を用いて重合する場合に
おいては原料モノマーの濾過に加え、得られた重合物を
充分洗浄することにより分散剤をほぼ完全に除去するこ
とが必要である。従って工程の簡素化のためには、塊状
重合法が好適に用いられる。In order to prevent the acrylic resin from substantially containing foreign substances larger than visible light wavelength, in bulk polymerization, the raw material monomers used for the polymerization are filtered through a filter having a pore size of 0.4 μm or less. It can be achieved by using. Further, in the case of polymerizing with a dispersant in a dispersion medium such as suspension polymerization and emulsion polymerization, in addition to filtering the raw material monomer, the resulting polymer is thoroughly washed to almost completely remove the dispersant. is necessary. Therefore, in order to simplify the process, the bulk polymerization method is preferably used.
【００１３】該アクリル系樹脂を導光体に成形する方法
としては、公知の種々の方法がある。例えば、原料モノ
マー等を直接ガラスセル内で塊状重合するキャスト法、
上記の重合法で得られた該アクリル系樹脂の粉粒体を、
射出成形、押出成形のごとき溶融成形する方法などであ
る。中でも溶融成形では出来る限り熱履歴が少なく該ア
クリル系樹脂の熱分解等が生じにくい成形条件で成形す
ることが必要である。There are various known methods for molding the acrylic resin into a light guide. For example, a casting method in which raw material monomers and the like are directly bulk polymerized in a glass cell,
The acrylic resin powder obtained by the above polymerization method,
Examples of such methods include melt molding such as injection molding and extrusion molding. Above all, in melt molding, it is necessary to carry out molding under the molding conditions that the thermal history is as small as possible and thermal decomposition of the acrylic resin is unlikely to occur.
【００１４】光源装置に組み込む導光体は、さらに公知
の種々の処理加工を施してもよい。例えば、周方向の端
面を研磨処理、光出射面に、出射光を均一にするため光
拡散処理、光出射面と反対のつまり背面に出射光を均一
化させるため白色インクを用いたドット印刷のごとき光
拡散処理、導光体の光出射面以外の周囲に、銀蒸着のシ
ートやフィルム、発砲樹脂シートなどの光反射層を施設
等である。The light guide body incorporated in the light source device may be subjected to various known treatments. For example, polishing the end face in the circumferential direction, a light diffusion process to make the emitted light uniform on the light emission face, and dot printing using white ink to make the emitted light uniform on the back face opposite the light emission face Such as light diffusion treatment, light-reflecting layers such as silver vapor-deposited sheets and films and foamed resin sheets are provided around facilities other than the light emitting surface of the light guide.
【００１５】本発明における光源装置とは、原光源から
の光を該導光体に入射し、光出射部から光を出射する装
置をいい、入射する光とは、異なった位置で、異なった
方向に光を出射するものである。例えば、特許文献１
（実公昭５８−４６４４７号公報）のごとく、導光体が
板状であり、該板状の一方の端又は両端に原光源の照明
ランプを設置し、該板状の一方の面から光を出射させる
ものがある。この光源装置は、ワープロやパソコンのデ
ィスプレーの背面光源、看板・表示装置の背面光源など
に用いられ、導光体の形状により種々の光源に適用でき
る。The light source device in the present invention refers to a device that allows light from an original light source to enter the light guide member and emits light from the light emitting portion. The incident light differs from the incident light at different positions. The light is emitted in the direction. For example, Patent Document 1
(Japanese Utility Model Publication No. 58-46447), the light guide is plate-shaped, and an illumination lamp of an original light source is installed at one end or both ends of the plate-shaped light so that light is emitted from one surface of the plate-shaped light. There is something to emit. This light source device is used for a back light source of a display of a word processor or a personal computer, a back light source of a signboard / display device, and the like, and can be applied to various light sources depending on the shape of a light guide.
【００１６】原光源所謂照明ランプは、線状光源、点状
光源のいずれでもよく、例えばいわゆる冷陰極管と称さ
れるものやハロゲンランプなどである。The original light source, a so-called illumination lamp, may be either a linear light source or a point light source, and is, for example, a so-called cold cathode tube or a halogen lamp.
【００１７】[0017]
【発明の効果】本発明によれば、可視光線の透過度の高
い導光体を提供でき、該導光体を組み込んだ出射光輝度
の高い高性能な光源装置を提供することが可能である。
従って、各種ディスプレイの光源、液晶表示セルのバッ
クライト装置をより高性能とするものである。According to the present invention, it is possible to provide a light guide having a high transmittance of visible light, and to provide a high performance light source device incorporating the light guide and having high emission light brightness. .
Therefore, the light source of various displays and the backlight device of the liquid crystal display cell have higher performance.
【００１８】[0018]
【実施例】以下実施例によって本発明を更に詳しく説明
するが、本発明はこれら実施例によって制限されるもの
ではない。The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.
【００１９】実施例で用いた本発明の光源装置の一例を
図１及び図２に示す。
・光源装置：アクリル系樹脂板を縦１９０ｍｍ、横１６
０ｍｍに切断しこれを導光体の材料とし、周方向の四つ
の端面を研磨機〔朝日メガロ製「プラビューティー１０
００」〕により研磨した。二面のうち片面に光拡散処理
として白色インクでドット印刷を行い、これを裏面とす
る。研磨した面のうち長辺側面の一つに光源として直径
４ｍｍ、長さ２０２ｍｍ、１．４７Ｗ、３．５ｍＡの冷
陰極管を密着させ、残りの三面は白色のアクリル系樹脂
板で覆った。さらに導光体の出光表面に拡散板（拡散率
３６％）、裏面に反射板（反射率９０％）を設置したも
のである。An example of the light source device of the present invention used in the embodiments is shown in FIGS. 1 and 2.・ Light source device: acrylic resin plate 190 mm long, 16 horizontal
Cut it to 0 mm and use this as the material for the light guide, and grind the four end faces in the circumferential direction [Asahi Megalo's "Pla Beauty 10
00 "]. Dot printing is performed on one of the two surfaces with white ink as a light diffusion process, and this is used as the back surface. A cold cathode tube having a diameter of 4 mm, a length of 202 mm, a length of 1.47 W, and a current of 3.5 mA was adhered to one of the long side surfaces of the polished surface as a light source, and the remaining three surfaces were covered with a white acrylic resin plate. Further, a diffusion plate (diffusion rate 36%) is installed on the light emitting surface of the light guide, and a reflection plate (reflection rate 90%) is installed on the back surface.
【００２０】なお、評価方法は以下の通りである。
・２５０ｍｍの光路長の光学特性：試料のアクリル系樹
脂板を幅５０ｍｍ、横２５０ｍｍに切断し、周方向の四
端面を研磨機〔朝日メガロ製「プラビューティー１００
０」〕により研磨し、これを日立製作所製プラスチック
特性測定システム（Ｕ−３４１０型分光光度計と大型試
料室積分球付属装置から構成される）により２５０ｍｍ
の光路長で波長３８０〜７８０nmの範囲で５ｎｍきざみ
で各波長の光線透過率を測定した。
・輝度の測定：発光面から３５０ｍｍ離れた所で、輝度
計〔(株)トプコン製「ＢＭ−７」〕を用いた。測定点
は、発光面、縦１２等分線、横８等分線の交差点の７７
点とし、平均値で示した。The evaluation method is as follows.・ Optical characteristics of optical path length of 250 mm: Acrylic resin plate of the sample is cut into a width of 50 mm and a width of 250 mm, and four end faces in the circumferential direction are polished by a polishing machine [Made by Asahi Megalo "Pla Beauty 100
0 "], and 250 mm with a plastic property measuring system manufactured by Hitachi, Ltd. (composed of U-3410 type spectrophotometer and large sample chamber integrating sphere accessory)
The light transmittance of each wavelength was measured in steps of 5 nm in the wavelength range of 380 to 780 nm. -Measurement of luminance: A luminance meter ["BM-7" manufactured by Topcon Corp.) was used at a distance of 350 mm from the light emitting surface. The measurement point is 77 at the intersection of the light emitting surface, the vertical 12-division line, and the horizontal 8-division line.
It is set as a point and shown as an average value.
【００２１】実施例１
ポアサイズが０．２μｍのメンブランフィルターで系中
の異物を除去したメタクリル酸メチルおよびアクリル酸
メチルを用い特許文献４（特開平０７−１２６３０８号
公報）の実施例１に準じた塊状重合法によりメタクリル
酸メチル／アクリル酸メチル＝９３／７重量比の不純物
等が実質上含まれないアクリル系樹脂〔２３０℃、３．
８ｋｇ荷重におけるＭＦＲが１．５ｇ／１０分〕を得
た。該樹脂を田辺プラスチックス機械(株)製のスクリュ
ー径４０ｍｍの１軸押出機にて、樹脂温度２６５℃で溶
融樹脂をＴダイより押出し、ポリシングロール３本を介
して厚さ４ｍｍ、幅２０ｃｍのシートを得た。得られた
シートを導光体として、さらに該導光体を組み込んだ光
源装置を評価した。結果を表１に示す。Example 1 According to Example 1 of Patent Document 4 (Japanese Patent Laid-Open No. 07-126308), using methyl methacrylate and methyl acrylate from which foreign substances in the system were removed by a membrane filter having a pore size of 0.2 μm. By the bulk polymerization method, an acrylic resin [methyl methacrylate / methyl acrylate = 93/7 weight ratio substantially free of impurities, etc. [230 ° C., 3.
MFR at a load of 8 kg was 1.5 g / 10 minutes]. The molten resin was extruded from a T die at a resin temperature of 265 ° C. using a uniaxial extruder with a screw diameter of 40 mm manufactured by Tanabe Plastics Co., Ltd., and the thickness was 4 mm and the width was 20 cm through three polishing rolls. Got the sheet. Using the obtained sheet as a light guide, a light source device incorporating the light guide was evaluated. The results are shown in Table 1.
【００２２】比較例１
実施例１で得られたアクリル系樹脂に紫外線吸収剤とし
て「スミソーブ２００」〔住友化学工業(株)製〕を１０
０ｐｐｍ添加し、実施例１と同様にシートを押出し、実
施例１と同様に評価した。結果を表１に示す。COMPARATIVE EXAMPLE 1 "Sumisorb 200" (manufactured by Sumitomo Chemical Co., Ltd.) was added to the acrylic resin obtained in Example 1 as an ultraviolet absorber.
0 ppm was added, the sheet was extruded in the same manner as in Example 1, and evaluated in the same manner as in Example 1. The results are shown in Table 1.
【００２３】[0023]
【表１】 ━━━━━━━━━━━━━━━━━━━━━━━━━━ 250mm光路長の光学特性 平均輝度 ────────────── 400nmの 380〜780nmの 透過率(%) 平均透過率(%) （cd/m2） ━━━━━━━━━━━━━━━━━━━━━━━━━━ 実施例１ ８２ ８９ ４５０ 比較例１ ３１ ８２ ４２０ ━━━━━━━━━━━━━━━━━━━━━━━━━━[Table 1] ━━━━━━━━━━━━━━━━━━━━━━━━━━ Optical characteristics of 250 mm optical path length Average brightness ───────────── --400 nm 380 to 780 nm transmittance (%) Average transmittance (%) (cd / m 2 ) ━━━━━━━━━━━━━━━━━━━━━━━━━ Example 1 82 89 450 Comparative Example 1 31 82 420 ━━━━━━━━━━━━━━━━━━━━━━━━━━
【図１】本発明の導光体を用いた光源装置の例を示す図
である。FIG. 1 is a diagram showing an example of a light source device using a light guide according to the present invention.
【図２】図１のＡ−Ａ線断面図である。FIG. 2 is a sectional view taken along the line AA of FIG.
１は、原光源ランプを示す。２は、反射板を示す。３
は、光拡散処理部を示す。４は、導光体を示す。５は、
出光面光拡散板を示す。Reference numeral 1 indicates an original light source lamp. Reference numeral 2 indicates a reflector. Three
Indicates a light diffusion processing unit. Reference numeral 4 denotes a light guide. 5 is
The light-emitting surface light diffuser plate is shown.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｆ２１Ｙ 103:00 Ｆ２１Ｙ 103:00 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) F21Y 103: 00 F21Y 103: 00
Claims (4)
で濾過した原料モノマーを重合して得られたアクリル系
樹脂からなる導光体であって、該アクリル系樹脂の２５
０ｍｍの光路長で測定された４００ｎｍの波長の光の透
過率が７５％以上であり、かつ３８０ｎｍ〜７８０ｎｍ
の平均の光線透過率が８５％以上であることを特徴とす
る導光体。1. A light guide made of an acrylic resin obtained by polymerizing a raw material monomer filtered through a filter having a pore size of 0.4 μm or less.
The transmittance of light having a wavelength of 400 nm measured with an optical path length of 0 mm is 75% or more, and 380 nm to 780 nm.
A light guide having an average light transmittance of 85% or more.
たアクリル系樹脂である請求項１に記載の導光体。2. The light guide according to claim 1, wherein the acrylic resin is an acrylic resin obtained by bulk polymerization.
質的に含まない請求項１または請求項２に記載の導光
体。3. The light guide according to claim 1, which is substantially free of a substance that absorbs light having a wavelength of 400 nm.
部から光を出射する光源装置において、該導光体が請求
項１〜請求項３のいずれかに記載の導光体である光源装
置。4. A light source device in which light from an original light source is incident on a light guide and light is emitted from a light emitting portion, wherein the light guide is a light guide according to any one of claims 1 to 3. Light source device that is the body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002340536A JP2003227943A (en) | 2002-11-25 | 2002-11-25 | Waveguide body and light source device using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002340536A JP2003227943A (en) | 2002-11-25 | 2002-11-25 | Waveguide body and light source device using the same |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14307795A Division JPH08334626A (en) | 1995-06-09 | 1995-06-09 | Light transmission body and light source device using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003227943A true JP2003227943A (en) | 2003-08-15 |
Family
ID=27751445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002340536A Pending JP2003227943A (en) | 2002-11-25 | 2002-11-25 | Waveguide body and light source device using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003227943A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015072896A (en) * | 2013-09-03 | 2015-04-16 | 日本電気硝子株式会社 | Light guide plate |
| WO2020004131A1 (en) * | 2018-06-27 | 2020-01-02 | 日本電気硝子株式会社 | Method for producing glass substrate laminate, glass substrate, glass substrate laminate and head-mounted display |
-
2002
- 2002-11-25 JP JP2002340536A patent/JP2003227943A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015072896A (en) * | 2013-09-03 | 2015-04-16 | 日本電気硝子株式会社 | Light guide plate |
| WO2020004131A1 (en) * | 2018-06-27 | 2020-01-02 | 日本電気硝子株式会社 | Method for producing glass substrate laminate, glass substrate, glass substrate laminate and head-mounted display |
| JPWO2020004131A1 (en) * | 2018-06-27 | 2021-08-05 | 日本電気硝子株式会社 | Manufacturing method of glass substrate laminate, glass substrate, glass substrate laminate and head-mounted display |
| JP7228135B2 (en) | 2018-06-27 | 2023-02-24 | 日本電気硝子株式会社 | Method for manufacturing glass substrate laminate, glass substrate, glass substrate laminate, and head mounted display |
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