JPH08254617A - Surface light emitting device - Google Patents
Surface light emitting deviceInfo
- Publication number
- JPH08254617A JPH08254617A JP3444795A JP3444795A JPH08254617A JP H08254617 A JPH08254617 A JP H08254617A JP 3444795 A JP3444795 A JP 3444795A JP 3444795 A JP3444795 A JP 3444795A JP H08254617 A JPH08254617 A JP H08254617A
- Authority
- JP
- Japan
- Prior art keywords
- light
- emitting device
- plate
- light source
- fresnel lens
- 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)
- Planar Illumination Modules (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は液晶表示用バックライト
や各種ディスプレイ等に用いられる面発光装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface emitting device used for a liquid crystal display backlight, various displays and the like.
【０００２】[0002]
【従来の技術】液晶表示用バックライトや電飾看板等に
用いられる面発光装置には数多くの使用例があるが、そ
の多くは設計、製作のし易さ、発光の均一性、耐久性等
の観点から、アクリル導光板を用いたサイドエッジ型バ
ックライトが用いられている。アクリル導光板を用いた
サイドエッジ型バックライトには、前記のごとく優れた
特性を有するが故に今日面発光装置の主流となってい
る。2. Description of the Related Art There are many examples of use of surface emitting devices used in backlights for liquid crystal displays, illuminated signboards, etc., but most of them are easy to design and manufacture, have uniform light emission, durability, etc. From the viewpoint, a side edge type backlight using an acrylic light guide plate is used. The side edge type backlight using an acrylic light guide plate has become the mainstream of surface emitting devices today because of its excellent characteristics as described above.
【０００３】[0003]
【発明が解決しようとする課題】しかしながらアクリル
導光板を用いたサイドエッジ型バックライトでは、優れ
た特性の反面、コスト上昇や重量増加等の問題があり、
また導光板の厚みが薄くなるに従って発光エネルギ−が
減少するというアクリル導光板特有の属性によって、Ｏ
Ａ機器等における軽薄短小化と透過損失が大きいカラ−
液晶との組み合わせにおいても機能的な限界に突き当た
っているといった問題点があった。本発明は、方形周枠
の少なくとも一周縁側に光源を設置し、該光源の前面に
は表面に平行に配置されたプリズム状突起物を有する透
明シ−ト、即ちフレネルシートが配置されており、底面
に配置された底面反射板とこれに対応する位置に設置さ
れた拡散板とからなる空間部に前記光源の光を照射して
拡散板を均等発光せしめるようしてなることを特徴とす
る面発光装置を提供するものである。However, the side edge type backlight using the acrylic light guide plate has excellent characteristics, but has problems such as an increase in cost and an increase in weight.
Owing to the attribute peculiar to the acrylic light guide plate that the light emission energy decreases as the thickness of the light guide plate decreases, O
A light, thin, short and large transmission loss in equipment A, etc.
There was a problem that the functional limit was reached even in combination with liquid crystal. In the present invention, a light source is installed on at least one peripheral side of a rectangular peripheral frame, and a transparent sheet having prismatic projections arranged parallel to the surface, that is, a Fresnel sheet is arranged on the front surface of the light source, A surface characterized by irradiating the diffuser plate with light evenly by irradiating the light from the light source into a space portion composed of a bottom reflector plate arranged on the bottom face and a diffuser plate installed at a position corresponding to the bottom reflector plate. A light emitting device is provided.
【０００４】[0004]
【課題を解決するための手段】本発明は上記のような課
題を解決しようとするものであって、例えば従来のアク
リル導光板を用いたサイドエッジ型バックライトの基本
的設計の変更や改変を伴わず、しかも設計、並びに製造
上の簡便性、発光の均一性、耐久性等の優れた特性はそ
のままに、アクリル導光板に代替可能で、かつ機能上も
均等を維持できる構成について検討の結果、本発明に到
達したものである。本発明によれば、アクリル導光板の
欠点であった高コスト、重量増大や薄型時の発光性低下
といった諸問題点をことごとく解決すると共に、従来の
液晶用バックライトや電飾看板のみならずコスト面、発
光輝度性能等の面から今迄は見送られてきた一般照明器
具等の分野にまで適用可能な条件を充足するものであ
る。DISCLOSURE OF THE INVENTION The present invention is intended to solve the above problems and, for example, a change or modification of the basic design of a side edge type backlight using a conventional acrylic light guide plate can be performed. As a result of studying a configuration that can be replaced with an acrylic light guide plate and can maintain functional uniformity without changing the characteristics of the product, such as design, ease of manufacture, uniformity of light emission, and durability. The present invention has been reached. According to the present invention, it is possible to solve various problems such as high cost which is a defect of the acrylic light guide plate, increase in weight and decrease in light emission property when the device is thin, and cost as well as the conventional liquid crystal backlight and illuminated signboard. From the aspect of the surface, emission luminance performance, etc., the conditions applicable to general lighting equipment and the like, which have been postponed until now, are satisfied.
【０００５】本発明の面発光装置では、フレネルレンズ
シ−トを光源の前面に設置することによって指向性を持
たされた光が、拡散することなく底面に配置された反射
板とこれに対応する位置に設置された拡散板からなる空
間部に照射されるが、この場合拡散板を照射された光束
がまんべんなく投射される角度に配置することによっ
て、ロスなく且つ均一な面発光性を得ることができる構
成としたものである。また、本発明の面発光装置では、
拡散板に照射された光束をまんべんなく投射する為に、
拡散板を水平に保つことができなかった。面発光装置の
用途には拡散板が水平状態のいわゆるフラットな形状が
望ましい場合があり、フレネルレンズシ−トを光束軸と
水平方向に配置し、これに拡散シ−トを重ね合わせるこ
とによって光源から遠ざかるにしたがって減少する光エ
ネルギ−の伝達性を改善し、且つ底面反射板を光源から
の距離に比例して傾斜させることにより光エネルギ−の
減衰補償を図ったものである。さらに、本発明の面発光
装置で、拡散板の直下にフレネルレンズシ−トを装着し
た構成では、底面反射板とフレネルレンズシ−トによっ
て形成された平行な空間部に光拡散性の塗料によって光
源側からの距離と照度に反比例するようなグラディエ−
ションパタ−ンが印刷された発光補助板を配置すること
によって、発光輝度性能と均整度をさらに向上させる構
成とすることができる。In the surface emitting device of the present invention, the Fresnel lens sheet is installed on the front surface of the light source so that the light having directivity is arranged on the bottom surface without being diffused, and the corresponding reflector. It is irradiated to the space part consisting of the diffuser plate installed at a position, but in this case, by arranging the diffuser plate at an angle at which the irradiated light flux is evenly projected, it is possible to obtain uniform surface emission without loss. This is a configuration that can be done. Further, in the surface emitting device of the present invention,
In order to project the light flux irradiated on the diffuser evenly,
The diffuser could not be kept horizontal. In some applications of the surface emitting device, a so-called flat shape in which the diffusion plate is in a horizontal state is desirable, and a Fresnel lens sheet is arranged in the horizontal direction with respect to the luminous flux axis, and a diffusion sheet is superposed on the Fresnel lens sheet. It is intended to compensate the attenuation of the light energy by improving the transmissivity of the light energy which decreases as the distance from the light source increases and tilting the bottom reflector in proportion to the distance from the light source. Further, in the surface emitting device of the present invention, in the structure in which the Fresnel lens sheet is mounted immediately below the diffusion plate, the light diffusing paint is applied to the parallel space formed by the bottom reflection plate and the Fresnel lens sheet. Gladier that is inversely proportional to the distance from the light source side and the illuminance
By arranging the light emission auxiliary plate on which the printed pattern is printed, it is possible to further improve the light emission luminance performance and the uniformity.
【０００６】従来アクリル導光板等では、シリカ粉や酸
化チタニウム顔料等が用いられているが、本発明におい
ては更に拡散効率の高い非有機系化合物を使用すること
が適当である。また、底面反射板の材質については、好
ましくは光線反射率の高いものが望ましく、また、拡散
板には拡散率が高く、且つ透過損失の少ないものが望ま
しい。本発明での底面反射板としては、入手し易さ、コ
スト、平滑・平面性、放熱性等の理由から高反射性アル
ミニュウム薄板を、また反射板には極少ビ−ズ粉がコ−
ティングされたポリエステル・フィルムを採択するのが
適当である。さらに、発光補助板の材質は、透明のフィ
ルム状のもので、透過性、耐熱・耐久性に優れたものを
使用することが望ましい。本発明では１２５μポリエス
テル・フィルムを用いている。また、ここで使用する光
拡散性インキには拡散効率が良く、耐久性に優れたもの
を使用することが望ましい。Conventionally, silica powder, titanium oxide pigment, and the like have been used in acrylic light guide plates and the like, but in the present invention, it is appropriate to use a non-organic compound having a higher diffusion efficiency. The bottom reflector is preferably made of a material having a high light reflectance, and the diffuser is preferably made of a material having a high diffusion and a small transmission loss. As the bottom reflector in the present invention, a highly reflective aluminum thin plate is used because of its availability, cost, smoothness / flatness, heat dissipation, etc.
It is appropriate to adopt a coated polyester film. Further, the material of the light emission auxiliary plate is a transparent film, and it is desirable to use a material having excellent transparency, heat resistance and durability. The present invention uses a 125μ polyester film. Further, it is desirable to use a light-diffusing ink having a high diffusion efficiency and excellent durability.
【０００７】また、拡散板を何故に放物線状を呈した形
状で配置したかについては、例えば断面形状が楔型にな
るような直線的な配置にすると、ランプユニット近傍の
発光エネルギ−が高すぎて全体の輝度バランスが取れな
い為である。これは上述のフレネルレンズシ−トの集光
特性が小さいとはいえ１゜程度の拡散角を持っているこ
とや、底面反射板の表面仕上げ精度上の誤差等が影響し
ているものと推察されるからである。The reason why the diffuser plate is arranged in a parabolic shape is as follows. For example, when the diffuser plate is arranged linearly so that the sectional shape becomes a wedge shape, the light emission energy near the lamp unit is too high. This is because the entire brightness cannot be balanced. This is presumed to be due to the fact that the Fresnel lens sheet has a small light converging characteristic, but has a divergence angle of about 1 ° and an error in the surface finishing accuracy of the bottom reflector. Because it is done.
【０００８】[0008]
【作用】上記のように構成された本発明の面発光装置で
は、フレネルレンズシ−トを光源の前面に設置すること
により指向性を持たされた光が拡散することなく底面に
配置された反射板と、これに対応する位置に設置された
拡散板からなる空間部に照射され、該拡散板は照射され
た光束が均等に投射される角度に配置されているので、
ロスなく且つ均一な面発光性を得ることができるように
働く。また、フレネルレンズシ−トを光束軸と水平方向
に配置し、これに拡散シ−トを重ね合わせることによっ
て光源から遠ざかるにしたがって減少する光エネルギ−
の伝達性を改善し、且つ底面反射板を光源からの距離に
比例して傾斜させることにより光エネルギ−の減衰補償
を図れるように働く。さらに、底面反射板とフレネルレ
ンズによって形成された平行な空間部に、光拡散性の塗
料によって光源側からの距離と照度に反比例するような
グラディエ−ションパタ−ンが印刷された発光補助板を
配置することによって、面発光装置の発光輝度性能と均
整度をさらに向上させるように働く。In the surface emitting device of the present invention constructed as described above, the Fresnel lens sheet is installed on the front surface of the light source so that the directional light is reflected on the bottom surface without diffusion. A plate and a space formed of a diffusion plate installed at a position corresponding to the plate are irradiated, and the diffusion plate is arranged at an angle at which the irradiated light flux is evenly projected.
It works so as to obtain a uniform surface emission property without loss. Further, the Fresnel lens sheet is arranged in the horizontal direction with respect to the luminous flux axis, and the diffusion sheet is superposed on the sheet so that the light energy decreases as the distance from the light source increases.
Of the light energy is improved, and the bottom reflector is tilted in proportion to the distance from the light source, so that the attenuation compensation of the light energy can be achieved. Furthermore, in the parallel space formed by the bottom reflector and Fresnel lens, a light emitting auxiliary plate is printed with a light diffusing paint and a gradation pattern is printed that is inversely proportional to the distance from the light source side and the illuminance. By doing so, it functions to further improve the emission luminance performance and the uniformity of the surface emitting device.
【０００９】[0009]
【実施例】以下に本発明の一実施例について説明する。
図１は単一の光源を使用した場合の面発光装置の概略説
明斜視図、図２はフレネルレンズシ−トを前面に設置し
た説明斜視図、図３はフレネルレンズシ−トの光学特性
を示す説明図、図４はランプケースを装着したときのフ
レネルレンズシ−トを備えた状態の光学特性を示す説明
図、図５は同じくランプケースを装着したときのフレネ
ルレンズシ−トを備えない状態の光学特性を示す説明図
である。EXAMPLES An example of the present invention will be described below.
FIG. 1 is a schematic explanatory perspective view of a surface emitting device using a single light source, FIG. 2 is an explanatory perspective view in which a Fresnel lens sheet is installed on the front surface, and FIG. 3 shows optical characteristics of the Fresnel lens sheet. FIG. 4 is an explanatory diagram showing the optical characteristics of a state in which the Fresnel lens sheet is provided when the lamp case is attached, and FIG. 5 is the same, and the Fresnel lens sheet when the lamp case is attached is not provided. It is explanatory drawing which shows the optical characteristic of a state.
【００１０】実施例１ 図１〜２は、単一の光源１を使用し、該光源１の前面に
プリズム状突起物１１を有するフレネルレンズシ−ト４
を設置した構成であり、ランプケース３は光反射性が良
好なアルミニウム薄板若しくは内面に銀蒸着フィルム等
を貼付した素材によって形成されている。（以下ランプ
ユニットという）前記ランプユニットの下部と接する位
置には底面反射板５が設置されており、上部からは拡散
板６が底面反射板５の終端と接するように緩やかな放物
線を描いて配置されている。２はランプ・リード線であ
る。図３は、フレネルレンズシ−トの光学特性を示すも
ので、それぞれ光源１、フレネルレンズシ−ト４の断面
を表し、矢印は光線の進行方向を表している。光源１か
ら照射された光は指向性を持たない放射光であるが、フ
レネルレンズシ−ト４に入射した光は内部で整合され、
プリズム状の頂点１２から指向性を与えられて照射され
る。このときの光束の集光特性については、最も集光率
の高いプリズム断面のもので拡散角度１゜程度である。
図５はランプケースを装着したときのフレネルレンズシ
−トを備えない状態の光学特性を示すもので、光源１よ
りの光はランプケース３の内面壁に反射するか或いは該
ランプケース３の内面壁に反射しないで光源１より直接
外側方向へ照射されるが、一方、図４ではフレネルレン
ズシ−ト４に入射した光は内部で整合されプリズム状の
頂点１２から指向性を与えられて照射される状態を示し
ている。Embodiment 1 FIGS. 1 and 2 use a single light source 1 and a Fresnel lens sheet 4 having prismatic projections 11 on the front surface of the light source 1.
The lamp case 3 is formed of an aluminum thin plate having good light reflectivity or a material having a silver vapor deposition film attached to the inner surface thereof. A bottom reflector 5 is installed at a position in contact with the lower part of the lamp unit (hereinafter referred to as a lamp unit), and a diffusing plate 6 is arranged from above so as to draw a gentle parabola so as to contact the end of the bottom reflector 5. Has been done. 2 is a lamp lead wire. FIG. 3 shows the optical characteristics of the Fresnel lens sheet, showing the cross sections of the light source 1 and the Fresnel lens sheet 4, respectively, and the arrows show the traveling directions of the light rays. The light emitted from the light source 1 is the radiant light having no directivity, but the light incident on the Fresnel lens sheet 4 is internally matched,
Irradiation is given from the prism-shaped apex 12 with directivity. Regarding the condensing characteristics of the light flux at this time, the diffusion angle is about 1 ° for the prism section having the highest condensing rate.
FIG. 5 shows the optical characteristics when the lamp case is not mounted and the Fresnel lens sheet is not provided. Light from the light source 1 is reflected on the inner wall of the lamp case 3 or inside the lamp case 3. The light is directly emitted from the light source 1 without being reflected by the surface wall, but in FIG. 4, the light incident on the Fresnel lens sheet 4 is internally aligned and directed by the prism-shaped apex 12 to irradiate the light. The state is shown.
【００１１】上記のように構成された面発光装置は、全
体の輝度バランスも良く、得られた発光輝度は同程度の
容量を持つアクリル導光板型バックライトに比し２〜３
倍、また重量は４分の１程度であった。すなわち発光輝
度／重量比は全体の容量によって変化し、特に重量比に
ついては大型のものになればなるほど更に格差が拡がる
が、上記実施例１での面発光装置では、発光面が１８０
ｍｍ×１２０ｍｍの大きさであり、全体の輝度バックラ
イトに比して２〜３倍、また重量は４分の１程度を示し
た。The surface emitting device having the above-described structure has a good overall luminance balance, and the obtained emission luminance is 2 to 3 as compared with the acrylic light guide plate type backlight having the same capacity.
Double the weight, and the weight was about one fourth. That is, the light emission luminance / weight ratio changes depending on the entire capacity, and the disparity becomes wider as the weight ratio becomes larger, but in the surface emitting device of the first embodiment, the light emitting surface is 180
The size was mm × 120 mm, which was 2 to 3 times the weight of the entire backlight, and the weight was about 1/4.
【００１２】実施例２ 図６は拡散板の直下にフレネルレンズシ−トを設け拡散
板を装着前の概略斜視図、図７は拡散板の直下にフレネ
ルレンズシ−トを設け拡散板を装着した面発光装置の断
面説明図である。図６〜７において、ランプユニット下
部と接する位置には底面反射板５が設けられ、終端は上
面フレネルレンズシ−ト７に接するように断面が放物線
を描いて形成されている。ランプユニット上部からはフ
レネルレンズシ−ト７がランプユニットから照射される
光束軸と平行になるような位置関係で設置され、更にそ
の上から拡散板６が重ねて設置されている。ランプユニ
ットから照射された光エネルギ−は順次拡散板６によっ
て発光して消費され、光源から遠ざかるにつれて減少す
る為、そのままでは輝度バランスが取れないのである
が、本発明では光束軸と水平に置かれた上面フレネルレ
ンズシート７内を入射光が走り、遠方伝達性を高めてい
る。また底面反射板５も遠方に行くにしたがって断面形
状が緩やかに放物線を描いて上昇し、ランプユニット下
部付近から照射される光エネルギ−を効率よく上面に送
り出すように形成されている。Embodiment 2 FIG. 6 is a schematic perspective view of a Fresnel lens sheet provided directly below the diffusion plate before the diffusion plate is mounted, and FIG. 7 is a Fresnel lens sheet provided immediately below the diffusion plate and the diffusion plate is mounted. It is a cross-sectional explanatory view of the surface emitting device. 6 to 7, a bottom reflector 5 is provided at a position in contact with the lower part of the lamp unit, and a terminating end thereof is formed in a parabolic shape so as to contact the upper Fresnel lens sheet 7. From the upper part of the lamp unit, a Fresnel lens sheet 7 is installed in such a positional relationship that it is parallel to the luminous flux axis emitted from the lamp unit, and further, a diffusion plate 6 is installed over it. The light energy emitted from the lamp unit is sequentially emitted by the diffusing plate 6 and consumed, and decreases as the distance from the light source increases. Therefore, the brightness cannot be balanced as it is. However, in the present invention, the light energy is placed horizontally. Incident light runs in the upper Fresnel lens sheet 7 to enhance far-field transmission. Further, the bottom reflector 5 is also formed so that its cross-sectional shape gradually rises in a parabola as it goes away, and the light energy emitted from the vicinity of the lower portion of the lamp unit is efficiently sent to the upper surface.
【００１３】上記実施例２によって作成された面発光装
置では、前記実施例１の面発光装置に比して発光輝度性
能では約５％程度劣るものの全体の容量比で約３０％減
を果たし、同容量アクリル導光板型バックライトとの性
能比ではむしろ高効率の発光輝度性能を収めた。The surface emitting device manufactured according to the second embodiment is inferior to the surface emitting device according to the first embodiment in emission luminance performance by about 5%, but the overall capacity ratio is reduced by about 30%. In comparison with the same capacity acrylic light guide plate type backlight, it has rather high efficiency of emission luminance performance.
【００１４】実施例３ 図８は前記請求項３記載の面発光装置の断面説明図であ
り、ランプユニット下部と接する位置には底面反射板５
が置かれ、終端部には後面反射板９が設置されている。
また、ランプユニット上部からは請求項２記載の面発光
装置と同様に光束軸と平行な位置関係になるように上面
フレネルレンズシ−ト７と拡散板６が重ねて設置されて
いる。発光補助板８の材質は透明フィルム状のもので、
透過性、耐熱、耐久性に優れたものを使用することが好
ましい。前記請求項３記載に対応する実施例３では、厚
さ１２５μのポリエステル・フィルムを使用している。
さらにランプ下部の近傍部には底面反射板５からの乱反
射を抑える為の非反射コート１０がなされ、これと連続
して光源側からの距離と照度に反比例するようなグラデ
ィエ−ション・パタ−ンが印刷された発光補助板８が、
終端部では後面反射板９の上部と接触するように設置さ
れている。Embodiment 3 FIG. 8 is a cross-sectional explanatory view of the surface emitting device according to claim 3, wherein the bottom reflector 5 is provided at a position in contact with the lower part of the lamp unit.
And a rear reflector 9 is installed at the terminal end.
Further, from the upper part of the lamp unit, similarly to the surface emitting device according to the second aspect, the upper Fresnel lens sheet 7 and the diffusing plate 6 are placed so as to be in a positional relationship parallel to the luminous flux axis. The material of the light emission auxiliary plate 8 is a transparent film,
It is preferable to use a material having excellent transparency, heat resistance and durability. In Example 3 corresponding to the third aspect, a polyester film having a thickness of 125 μ is used.
Further, a non-reflective coating 10 for suppressing diffused reflection from the bottom reflection plate 5 is provided in the vicinity of the lower part of the lamp, and a gradient pattern which is continuous with this and is inversely proportional to the distance from the light source side and the illuminance. The light emission auxiliary plate 8 on which is printed,
The terminal portion is installed so as to come into contact with the upper portion of the rear reflector 9.
【００１５】上記請求項２記載の面発光装置では、底面
反射板５を傾斜させることによって遠方部の光エネルギ
−の減衰を補償していたのであるが、請求項３記載では
発光補助板８によってこれを実現している。すなわち請
求項２記載の面発光装置は底面反射板５の断面形状が漸
進的方物形状を描いていた為にややもするとかなり高度
な加工精度が要求されるものであったが、請求項３記載
の装置では発光補助板８はフィルム形状であるため加工
性が良く、さらに発光性能においても同容量の請求項２
の面発光装置のそれを上回る性能のものが得られた。な
お、発光補助板８に施すグラディエ−ション・パタ−ン
についても、アクリル導光板の発光手法の多くに見られ
る手法と変りなく同一であり、たとえば設計基準の再構
築も要しない。なお、本発明の一実施例について説明し
たが、本発明は上記した実施例に限定されるものではな
く、本発明の要旨を逸脱しない範囲の設計変更等とがあ
っても本発明に含まれる。In the surface emitting device according to the second aspect, the attenuation of the light energy in the distant portion is compensated by inclining the bottom reflecting plate 5, but in the third aspect, the light emitting auxiliary plate 8 is used. This is achieved. That is, in the surface emitting device according to the second aspect, since the cross-sectional shape of the bottom reflection plate 5 is a gradual parabolic shape, a rather high processing accuracy is required, but the third aspect is the third aspect. In the device described above, since the light emission auxiliary plate 8 is in the form of a film, the workability is good and the light emission performance is the same.
The surface emitting device having a higher performance than that of the surface emitting device was obtained. The graduation pattern applied to the light emission auxiliary plate 8 is the same as that found in most of the light emission methods of the acrylic light guide plate, and it is not necessary to rebuild the design standard, for example. It should be noted that although one embodiment of the present invention has been described, the present invention is not limited to the above-mentioned embodiment, and even if there are design changes and the like within a range not departing from the gist of the present invention, the present invention is included. .
【００１６】[0016]
【発明の効果】本発明の構成によれば、従来アクリル導
光板を用いたサイドエッジ型バックライトにおける高コ
スト、重量増大や薄型時の発光性低下といった欠点を解
消し、かつ従来品での基本的設計の変更や改変を伴うこ
となく、設計並びに製造上の簡便性、発光の均一性、耐
久性等を得ることができる。また、上記アクリル導光板
との代替に止まらず、従来の液晶用バックライト、電飾
看板等のほか、一般照明器具等の分野に迄適用できる等
の効果を奏する。According to the constitution of the present invention, the drawbacks such as high cost, weight increase and light emission deterioration at the time of thinning in the side edge type backlight using the conventional acrylic light guide plate are solved, and the basic structure of the conventional product is eliminated. It is possible to obtain simplicity in design and manufacturing, uniformity of light emission, durability, etc. without changing or modifying the dynamic design. Further, the present invention can be applied not only as a substitute for the acrylic light guide plate but also in the field of conventional backlights for liquid crystals, illuminated signboards, and general lighting equipment.
【図１】単一の光源を使用した場合の面発光装置の概略
説明斜視図である。FIG. 1 is a schematic explanatory perspective view of a surface emitting device when a single light source is used.
【図２】フレネルレンズシ−トを前面に設置した説明斜
視図である。FIG. 2 is an explanatory perspective view in which a Fresnel lens sheet is installed on the front surface.
【図３】フレネルレンズシ−トの光学特性を示す説明図
である。FIG. 3 is an explanatory diagram showing optical characteristics of a Fresnel lens sheet.
【図４】ランプケースを装着時のフレネルレンズシ−ト
を備えた状態の光学特性を示す説明図である。FIG. 4 is an explanatory diagram showing optical characteristics when a lamp case is mounted and a Fresnel lens sheet is provided.
【図５】ランプケースを装着時のフレネルレンズシ−ト
を備えない状態の光学特性を示す説明図である。FIG. 5 is an explanatory diagram showing optical characteristics when a lamp case is mounted and a Fresnel lens sheet is not provided.
【図６】拡散板を装着前の概略斜視図である。FIG. 6 is a schematic perspective view before mounting a diffusion plate.
【図７】拡散板を装着した面発光装置の断面説明図であ
る。FIG. 7 is a cross-sectional explanatory view of a surface emitting device equipped with a diffusion plate.
【図８】発光補助板を有する面発光装置の断面説明図で
ある。FIG. 8 is a cross-sectional explanatory view of a surface emitting device having a light emission auxiliary plate.
１ 光源 ２ ランプ・リード線 ３ ランプケース ４ フレネルレンズシート ５ 底面反射板 ６ 拡散板 ７ 上面フレネルレンズシート ８ 発光補助板 ９ 後面反射板 １０ 非反射コート １１ プリズム状突起物 １２ 頂点 1 Light Source 2 Lamp / Lead Wire 3 Lamp Case 4 Fresnel Lens Sheet 5 Bottom Reflector 6 Diffuser 7 Top Fresnel Lens Sheet 8 Light Auxiliary Plate 9 Rear Reflector 10 Non-Reflective Coating 11 Prism-like Projection 12 Vertex
Claims (3)
設置し、該光源の前面には表面に平行に配置されたプリ
ズム状突起物を有する透明シ−ト（以下フレネルレンズ
シートという）が配置されており、底面に配置された底
面反射板とこれに対応する位置に設置された拡散板とか
らなる空間部に前記光源の光を照射して拡散板を均等発
光せしめるようにしてなることを特徴とする面発光装
置。1. A light source is installed on at least one peripheral side of a rectangular peripheral frame, and a transparent sheet (hereinafter referred to as Fresnel lens sheet) having prism-shaped projections arranged parallel to the surface is arranged on the front surface of the light source. The diffuser plate is uniformly illuminated by irradiating the light from the light source to the space portion composed of the bottom reflector plate disposed on the bottom face and the diffuser plate installed at a position corresponding to the bottom reflector plate. A characteristic surface emitting device.
トを装着してなる請求項１記載の面発光装置。2. A Fresnel lens sheet immediately below the diffusion plate.
The surface emitting device according to claim 1, wherein the surface emitting device is mounted.
源側からの距離と照度に反比例するようなグラディエ−
ション・パタ−ンが印刷された発光補助板を装着してな
る請求項１及び２記載の面発光装置。3. A gladiator that is inversely proportional to the distance from the light source side and the illuminance by using a light diffusing paint in the space.
3. The surface emitting device according to claim 1, further comprising a light emission auxiliary plate on which a pattern is printed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3444795A JPH08254617A (en) | 1995-01-30 | 1995-01-30 | Surface light emitting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3444795A JPH08254617A (en) | 1995-01-30 | 1995-01-30 | Surface light emitting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08254617A true JPH08254617A (en) | 1996-10-01 |
Family
ID=12414512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3444795A Pending JPH08254617A (en) | 1995-01-30 | 1995-01-30 | Surface light emitting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08254617A (en) |
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-
1995
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