【０００１】[0001]
【産業上の利用分野】本発明はパーソナルコンピュータ
やワードプロセッサあるいは時計及びポケットベル用の
液晶表示素子等のバックライトに使用される平面照光装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat illumination device used as a backlight for a personal computer, a word processor, a liquid crystal display device for a timepiece, a pager or the like.
【０００２】[0002]
【従来の技術】拡散反射板等と呼ばれる側面光源型の小
型平面照光装置は、表面を照光面とし、下側に反射体を
設けた導光板の一側端または両側端に光源を配置して構
成される。また、エッジライトやライトガイド方式等と
呼ばれる側面光源型の平面照光装置は、導光板に重ね合
わせた光拡散板の表面を照光面とする導光板の一側端ま
たは両側端に光源を配置し、照光面を除く導光板の各面
と光源とを反射体で覆って構成されている。2. Description of the Related Art A side surface light source type small planar illuminating device called a diffuse reflection plate or the like has a front surface as an illuminating surface, and a light source is arranged at one end or both ends of a light guide plate provided with a reflector below. Composed. In addition, a side surface light source type planar illumination device called an edge light or a light guide system is one in which a light source is arranged at one end or both ends of a light guide plate having the surface of a light diffusion plate superposed on the light guide plate as an illumination surface. Each surface of the light guide plate except the illuminated surface and the light source are covered with a reflector.
【０００３】側面光源型の小型平面照光装置は、導光板
の少なくとも一側端に、豆電球や発光ダイオード（以下
ＬＥＤという。）等の光源を別途設けたものが多く使わ
れている。この方式では配線した光源を先に取り付け、
拡散反射板等と呼ばれる小型の導光板を、所定の位置に
据え付けるもので、光源の配線、取り付けと導光板の据
付と多くの工数を要するうえ、光源の位置ずれによる輝
度の低下という問題があった。一方、前記ライトガイド
方式等と呼ばれる平面照光装置は、光源を包むように巻
いたフィルム状の反射体の両端を、導光板の光源取り付
け部の上下両面に接着することにより、導光板の少なく
とも一側端に冷陰極管等の光源を設け、導光板の上面に
光拡散板を接合し、導光板の上面および光源取り付け部
を除く各面に反射体を設けて組み立てられている。この
方法では、フィルム状の反射体の巻き付けが緩くなる
と、光源と導光板の間に隙間を生じ、光源の位置ずれの
原因となり、この位置ずれによって照光面の輝度低下や
輝度ムラを生じるという問題を抱えていた。A small side surface light source type planar illumination device is often used in which a light source such as a miniature bulb or a light emitting diode (hereinafter referred to as an LED) is separately provided at least at one side end of a light guide plate. In this method, the wired light source is attached first,
A small light guide plate called a diffuse reflection plate is installed at a predetermined position.This requires a lot of man-hours such as wiring and mounting of the light source, installation of the light guide plate, and there is a problem that the brightness is lowered due to the position shift of the light source. It was On the other hand, in the flat illumination device called the light guide system or the like, at least one side of the light guide plate is obtained by bonding both ends of a film-shaped reflector wound so as to wrap the light source to the upper and lower surfaces of the light source mounting portion of the light guide plate. A light source such as a cold cathode tube is provided at the end, a light diffusion plate is joined to the upper surface of the light guide plate, and reflectors are provided on the upper surface of the light guide plate and each surface except the light source mounting portion. In this method, when the winding of the film-shaped reflector becomes loose, a gap is created between the light source and the light guide plate, which causes a positional deviation of the light source, and this positional deviation causes a decrease in brightness of the illumination surface and uneven brightness. I was holding.
【０００４】[0004]
【発明が解決しようとする課題】上述の従来例におい
て、フィルム状の反射体の巻き付けが緩くなるのを防ぐ
には、作業者の注意力に頼ることこと以外に画期的な方
策がなく、また、小型の平面照光装置は、位置ずれに起
因する照光面の輝度低下や輝度ムラを充分に解決するに
は至らなかった。In the above-mentioned conventional example, in order to prevent the winding of the film-shaped reflector from becoming loose, there is no epoch-making measure other than relying on the attention of the operator. In addition, the small-sized flat illumination device has not been able to sufficiently solve the decrease in the brightness of the illuminated surface and the uneven brightness due to the positional shift.
【０００５】本発明は、このような実情を背景にしてな
されたもので、光源の位置ずれの発生を防ぐことのでき
る安価な平面照光装置を提供しようとするものである。The present invention has been made in view of such circumstances, and it is an object of the present invention to provide an inexpensive flat illumination device capable of preventing the displacement of the light source.
【０００６】[0006]
【課題を解決するための手段】上従の目的に従い、本発
明は、拡散反射板等と呼ばれる小型の側面光源型の平面
照光装置および前記ライトガイド方式等と呼ばれる側面
光源型の平面照光装置に使用する導光板に、光源を埋め
込むように（以下埋没という。）一体成形して光源一体
化導光板としたものである。According to the above object of the present invention, the present invention provides a small side surface light source type planar illumination device called a diffuse reflection plate or the like and a side light source type flat surface illumination device called the light guide system. The light guide plate to be used is integrally molded so as to embed a light source (hereinafter referred to as “embedding”) to form a light source integrated light guide plate.
【０００７】[0007]
【作 用】上述の本発明では、導光板の定められた光源
取り付け位置に、接続端子を設けた光源を埋没、一体化
するように成形して光源一体化導光板とすることによ
り、光源取り付け工程の簡略化と光源の位置ずれ防止に
作用する。[Operation] In the present invention described above, a light source integrated light guide plate is formed by burying and integrating a light source provided with a connection terminal at a predetermined light source mounting position of the light guide plate, thereby mounting the light source. It acts to simplify the process and prevent displacement of the light source.
【０００８】[0008]
【実施例】以下、本発明の各実施例を図面に基づいて説
明する。Embodiments of the present invention will be described below with reference to the drawings.
【０００９】図１乃至図３は本発明の第１実施例を示
し、光源一体化導光板２を用いる平面照光装置１は、上
面を照光面とする光源一体化導光板２の一側端の内側に
光源３を内臓して構成される。FIGS. 1 to 3 show a first embodiment of the present invention, in which a flat illumination device 1 using a light source integrated light guide plate 2 has one side end of a light source integrated light guide plate 2 having an upper surface as an illumination surface. The light source 3 is incorporated inside.
【００１０】平面照光装置１は、本発明者が平成３年７
月２４日出願の特許願い整理番号＝Ｈ００００１に記載
の実施例１の導光板にＬＥＤの光源３を埋没、一体化す
るように、例えば加圧成形して、光源一体化導光板２と
したものである。従って、光源一体化導光板２は、整理
番号＝Ｈ００００１の実施例１により、アクリル樹脂等
の透明な合成樹脂が使われ、下面にはいぼ状の突起物で
あるキョーブコーナー等と呼ばれる多面プリズム（以下
多面プリズムという。）２Ｙが縦横に連続して突設され
た形状を持ち、従来より常識的に使用されてきた下側に
設ける反射体を使わずに、その下面に設けた多面プリズ
ムの反射効果を利用して、平面照光装置の性能を落とす
ことなく単純化した導光板である。また、光源一体化導
光板２は、埋没光源付近の側端面２ａから電源接続端子
４が引き出されている。The flat illumination device 1 was designed by the present inventor in July 1991.
A light source integrated light guide plate 2 is formed, for example, by pressure molding so that the light source 3 of the LED is embedded and integrated in the light guide plate of Example 1 described in the patent application serial number = H00001 filed on the 24th of March. Is. Therefore, the light source integrated light guide plate 2 is made of a transparent synthetic resin such as acrylic resin according to the first embodiment with reference number = H00001, and the lower surface is a multifaceted prism called a Kouve corner which is a wart-like protrusion. (Hereinafter referred to as a polyhedral prism.) 2Y has a shape in which it is vertically and horizontally continuously projected, and without using a reflector provided on the lower side, which has been conventionally used in common sense, a polyhedral prism provided on the lower surface It is a light guide plate that utilizes the reflection effect and is simplified without degrading the performance of the flat illumination device. Further, in the light source integrated light guide plate 2, the power source connection terminal 4 is drawn out from the side end surface 2a near the buried light source.
【００１１】このような構成による光源一体化導光板２
は、前記、反射体不要の導光板を使うことにより、光源
一体化導光板２自体が平面照光装置１となるものであ
る。またこの場合、電源接続端子４の構造が差し込みソ
ケットを兼ねて作られているので、所定の場所に設けら
れた電源の受け口に差し込むだけで、導光板の位置決
め、取り付け、配線ができる。さらに、光源が光源一体
化導光板２に内臓されているので、取り付け後の光源と
導光板の位置ずれは起こらない。A light source integrated light guide plate 2 having such a configuration
The light source integrated light guide plate 2 itself becomes the planar illumination device 1 by using the light guide plate that does not require a reflector. Further, in this case, since the structure of the power supply connection terminal 4 is made to also serve as an insertion socket, the light guide plate can be positioned, attached and wired by simply inserting it into a power supply receiving port provided at a predetermined location. Furthermore, since the light source is built in the light source integrated light guide plate 2, the positional displacement between the light source and the light guide plate after attachment does not occur.
【００１２】このようにして本実施例１は、従来の導光
板に代えて、導光板作成と同時に光源が所定の位置に設
けられた光源一体化導光板２を使用することにより、前
述した、光源取り付け後の位置ずれに起因する照光面の
輝度低下や輝度ムラのない、取り付け工数低減による安
価な平面照光装置１が得られる。As described above, the first embodiment uses the light source integrated light guide plate 2 in which the light source is provided at a predetermined position at the same time when the light guide plate is formed, instead of the conventional light guide plate. It is possible to obtain the inexpensive flat illumination device 1 which does not have a decrease in brightness or uneven brightness due to the positional displacement after the light source is mounted and which has a reduced number of mounting steps.
【００１３】次に、本発明の他の実施例を説明する。Next, another embodiment of the present invention will be described.
【００１４】図４乃至図６は、本発明の第２実施例を示
し、平面照光装置１０は、上面を照光面１ａとする光拡
散板５を、光源一体化導光板の上面１２ｂに重ね、下側
に反射体６を設けたもので、光源一体化導光板１２の両
側端１２ａの内側に光源３を内臓して構成される。FIGS. 4 to 6 show a second embodiment of the present invention. In a flat illumination device 10, a light diffusing plate 5 having an upper surface as an illumination surface 1a is superposed on an upper surface 12b of a light source integrated light guide plate. The reflector 6 is provided on the lower side, and the light source 3 is incorporated inside both side ends 12a of the light source integrated light guide plate 12.
【００１５】光源一体化導光板１２は、アクリル樹脂等
の透明な合成樹脂が使われ、内側両側端部１２ｃが薄
く、中央部が最大の厚みとなる逆山形の下面に、前記、
多面プリズム１２Ｙが全面に渡って隙間無く設けられ、
その両側には、複数のＬＥＤを並べたブロック状の光源
３が、図５に示すように、光源一体化導光板１２の構造
上半分露出したような形となってそれぞれ設けられた形
状となり、例えばこれを加圧成形して、光源一体化導光
板１２としたものである。さらに、光源一体化導光板１
２は、埋没光源付近の側端面１２ａから電源接続端子４
が引き出されている。The light source-integrated light guide plate 12 is made of a transparent synthetic resin such as acrylic resin, has thin inner side end portions 12c, and has an inverted chevron-shaped lower surface having a maximum thickness in the central portion.
The multi-facet prism 12Y is provided over the entire surface without any gap,
As shown in FIG. 5, on both sides thereof, a block-shaped light source 3 in which a plurality of LEDs are arranged is provided so as to be half exposed due to the structure of the light source integrated light guide plate 12, respectively. For example, this is pressure-molded to form the light source integrated light guide plate 12. Further, the light source integrated light guide plate 1
2 is a power source connecting terminal 4 from the side end surface 12a near the buried light source.
Have been pulled out.
【００１６】このような構成による平面照光装置１０
は、電源を内蔵する光源一体化導光板の上面１２ｂに光
拡散板５を重ね合わせ、下側に反射体６を取り付けただ
けの単純な構造となる。さらに、電源接続端子４の構造
が差し込みソケットを兼ねて作られているので、所定の
場所に設けられた電源の受け口に差し込むだけで、導光
板の位置決め、取り付けと配線ができる。また、複数の
ＬＥＤを並べたブロック状の光源３を使用して、光源一
体化導光板１２に内臓させた結果、前述したフィルム状
反射体関連の問題がなくなるので、光源の位置ずれに起
因する照光面の輝度低下や輝度ムラは生じない。The flat illumination device 10 having such a structure.
Has a simple structure in which the light diffusing plate 5 is superposed on the upper surface 12b of the light source integrated light guide plate having a built-in power source and the reflector 6 is attached to the lower side. Further, since the structure of the power supply connection terminal 4 also serves as an insertion socket, the light guide plate can be positioned, attached and wired simply by inserting it into a power supply receptacle provided at a predetermined location. In addition, as a result of using the block-shaped light source 3 in which a plurality of LEDs are arranged and incorporating it in the light source integrated light guide plate 12, the above-mentioned problems related to the film-shaped reflector are eliminated, which is caused by the position shift of the light source. There is no decrease in brightness or uneven brightness on the illuminated surface.
【００１７】このようにして本発明は、従来の導光板に
代えて、光源一体化導光板１２を用いた単純化構造にし
たことにより、フィルム状の反射体の巻き付け作業等光
源と導光板間に生ずる問題を解決し、組み立て工程の簡
略化した安価な平面照光装置１０が得られた。Thus, the present invention has a simplified structure using the light source integrated light guide plate 12 in place of the conventional light guide plate, so that the work of winding a film-shaped reflector is performed between the light source and the light guide plate. An inexpensive flat illumination device 10 having a simplified assembling process has been obtained by solving the problems described above.
【００１８】尚、本発明は、導光板を使った側面光源型
の平面照光装置に使用する導光板が対象なのであり、導
光板の形状を限定するものではない。従って、光源一体
化導光板は、デジタル時計等に使われる小型液晶表示素
子用の平面照光装置に用いてよく、また、光源に冷陰極
管を用いる大型液晶表示素子用の平面照光装置に用いて
もよい。さらに光源は一灯から複数多灯までを含み、特
に限定を設けない。The present invention is intended for a light guide plate used in a side surface light source type flat illumination device using a light guide plate, and does not limit the shape of the light guide plate. Therefore, the light source-integrated light guide plate may be used in a flat illumination device for a small liquid crystal display element used in a digital timepiece or the like, and may be used in a flat illumination device for a large liquid crystal display element using a cold cathode tube as a light source. Good. Further, the light source includes one lamp to a plurality of lamps and is not particularly limited.
【００１９】また、光源の取り付け位置についても導光
板の一側端部でも両側端部あるいは三側端部や四側端部
でもよく、さらに、光源は導光板内に完全に埋め込む形
でも前記実施例２のように半分埋め込む形であっても差
支えない。また導光板に内臓させる光源は、実施例２、
図１０のように垂直に据え付けるばかりではなく、導光
板の厚さ等の必要条件により、実施例１、図２のように
適当な角度を付けて据え付けることが考えられるので、
光源の据付角度については特に限定しない。The light source may be attached at one end, both ends, three ends or four ends of the light guide plate, and the light source may be completely embedded in the light guide plate. The half-filled shape as in Example 2 does not matter. The light source incorporated in the light guide plate is
Not only is it installed vertically as shown in FIG. 10, but it is possible to install it at an appropriate angle as shown in Example 1 and FIG. 2 depending on the necessary conditions such as the thickness of the light guide plate.
The installation angle of the light source is not particularly limited.
【００２０】[0020]
【発明の効果】本発明は、以上説明したように、側面光
源型の平面照光装置において、ほぼ常識的に使用されて
きた導光板と、少なくともその一側端の外部に設けられ
ていた光源を、導光板の側端部の内部に据え付けて成形
することにより、光源一体化導光板としたことを特徴と
するものであり、また、埋没した光源付近の導光板の側
端面から引き出した電源接続端子をソケットとして利用
したものである。As described above, according to the present invention, in a side surface light source type planar illuminating device, a light guide plate which has been generally used in common sense and a light source provided outside at least one side end thereof are provided. The light source integrated light guide plate is characterized by being installed and molded inside the side end portion of the light guide plate, and the power supply connection drawn from the side end face of the light guide plate near the buried light source. The terminal is used as a socket.
【００２１】このように光源一体化導光板を使用するこ
とにより、光源取り付け後の位置ずれに起因する照光面
の輝度低下や輝度ムラのない、安価な平面照光装置が得
られる。By using the light source-integrated light guide plate as described above, it is possible to obtain an inexpensive planar illuminating device in which the brightness of the illuminating surface is not lowered or the brightness is not uniform due to the positional deviation after the light source is mounted.
【００２２】[0022]
【図１】本発明の第１実施例を示す平面照光装置１の平
面図FIG. 1 is a plan view of a flat illumination device 1 showing a first embodiment of the present invention.
【図２】同じく平面照光装置１の断面正面図FIG. 2 is a sectional front view of the flat illumination device 1 in the same manner.
【図３】図２のＩ−Ｉ断面図FIG. 3 is a sectional view taken along line I-I of FIG.
【図４】同じく平面照光装置１０の平面図FIG. 4 is a plan view of the flat illumination device 10.
【図５】同じく平面照光装置１０の断面正面図FIG. 5 is a sectional front view of the flat illumination device 10 in the same manner.
【図６】図４のＩＩ−ＩＩ断面図6 is a sectional view taken along line II-II of FIG.
１，１０…平面照光装置 １ａ…照光面 ２，１２…導光板 ２ａ，１２ａ…導光板の埋没光源側付近の側端面 １２ｂ…導光板上面 １２ｃ…導光板の内側両側端部 ２Ｙ，１２Ｙ…多面プリズム ３…光源 ４…電源接続端子 ５…光拡散板 ６…反射体 1, 10 ... Planar illuminating device 1a ... Illumination surface 2, 12 ... Light guide plate 2a, 12a ... Side end surface near the embedded light source side of the light guide plate 12b ... Prism 3 ... Light source 4 ... Power supply connection terminal 5 ... Light diffusion plate 6 ... Reflector
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3274497AJPH05127158A (en) | 1991-07-25 | 1991-07-25 | Plane illuminating device |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3274497AJPH05127158A (en) | 1991-07-25 | 1991-07-25 | Plane illuminating device |
| Publication Number | Publication Date |
|---|---|
| JPH05127158Atrue JPH05127158A (en) | 1993-05-25 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3274497APendingJPH05127158A (en) | 1991-07-25 | 1991-07-25 | Plane illuminating device |
| Country | Link |
|---|---|
| JP (1) | JPH05127158A (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0772334A (en)* | 1993-09-06 | 1995-03-17 | Chiyatani Sangyo Kk | Surface illumination device |
| GB2438440A (en)* | 2006-05-26 | 2007-11-28 | Design Led Products Ltd | Composite light guiding device |
| US7826698B1 (en) | 2007-12-19 | 2010-11-02 | Oree, Inc. | Elimination of stitch artifacts in a planar illumination area |
| WO2012084967A1 (en)* | 2010-12-20 | 2012-06-28 | Mb-Microtec Ag | Display device having a transparent body |
| US8840276B2 (en) | 2011-11-16 | 2014-09-23 | Oree, Inc. | Illumination apparatus confining light by total internal reflection and methods of forming the same |
| US9164218B2 (en) | 2008-07-10 | 2015-10-20 | Oree, Inc. | Slim waveguide coupling apparatus and method |
| US9857519B2 (en) | 2012-07-03 | 2018-01-02 | Oree Advanced Illumination Solutions Ltd. | Planar remote phosphor illumination apparatus |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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