JPH08254617A - Surface light emitting device - Google Patents

Surface light emitting device

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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
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Japan
Prior art keywords
light
emitting device
surface
light source
plate
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Pending
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JP3444795A
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Japanese (ja)
Inventor
Masafumi Arita
Shigeru Otsuka
茂 大塚
雅史 有田
Original Assignee
Hoshi Seisakusho:Kk
Shinsei Kako Kk
新成加工株式会社
株式会社星製作所
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Application filed by Hoshi Seisakusho:Kk, Shinsei Kako Kk, 新成加工株式会社, 株式会社星製作所 filed Critical Hoshi Seisakusho:Kk
Priority to JP3444795A priority Critical patent/JPH08254617A/en
Publication of JPH08254617A publication Critical patent/JPH08254617A/en
Application status is Pending legal-status Critical

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Abstract

PURPOSE: To provide a surface light emitting device used for a liquid crystal display back light and various kinds of displays or the like.
CONSTITUTION: This surface light emitting device is constituted by arranging a light source 1 on one periphery side of a rectangular peripheral frame and arranging a transparent sheet (Fresnel lens sheet) having prism-like protrusions 11 arranged to be in parallel with a surface on a front surface and irradiating a spatial part made by a bottom reflection plate 5 and a diffusing plate 6 arranged at a position corresponding to it by the light of the light source 1 and making the diffusing plate 6 equally emit light. Thus, defects such as high cost, the increase of weight, deteriorated light emission in the case of thinning device by an acrylic light transmission plate are solved, and conveniences for designing and manufacturing and uniform light-emission are obtained. Also, it is applied for the field of general lighting equipments besides the light transmission plate.
COPYRIGHT: (C)1996,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【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。 The present invention relates to a surface light-emitting device used for a liquid crystal display backlights, various display.

【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。 BACKGROUND ART There are a number of use cases for a surface emitting device used for a liquid crystal display backlight or decorative illumination signboards, many design, fabrication ease, the uniformity of light emission, durability, etc. from the point of view, a side edge type backlight using an acrylic light guide plate is used. 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。 The side-edge type backlight using an acrylic light guide plate, it has become a mainstream has excellent characteristics as the thus today emitting device.

【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、 The side-edge type backlight using a However acrylic light guide plate [0005], excellent properties although the there is a cost increase and weight increase in problems,
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 Luminous energy according Also the thickness of the light guide plate becomes thinner - the acrylic light guide plate specific attributes of reducing, 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− Miniaturization of the device A or the like and the transmission loss is large color -
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。 There is a problem that has abutted against the functional limitations in combination with the liquid crystal. 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。 The present invention, a light source placed in at least one round edge of the rectangular peripheral frame, a transparent sheet having a prismatic projections which are arranged parallel to the surface in front of the light source - DOO, i.e. Fresnel sheet is arranged, surface, characterized in that formed by way of irradiating the light of the light source in space consisting of a bottom reflecting plate disposed on the bottom diffuser plate and disposed at a position corresponding to this allowed to evenly emit diffuser there is provided a light emitting device.

【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。 The present invention SUMMARY OF] has been made to try to solve the problems as described above, for example, the basic design of changes and modifications of the side-edge type backlight using the conventional acrylic light guide plate without, moreover designed, as well as ease of manufacturing, the uniformity of light emission, excellent characteristics are intact such as durability, the results of the study the structure capable of maintaining a uniform fungible acrylic light guide plate, and also on functional is the present invention has been completed. 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。 According to the present invention, not only acrylic costly was a defect of the light guide plate, as well as entirely solve various problems such as emission deterioration during increased weight and thickness, only the conventional backlighting and decorative illumination signboards liquid crystal cost surface, is intended to satisfy the conditions applicable to the field of general lighting equipment such as in terms of such emission luminance performance so far has been shelved.

【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。 [0005] In the surface emitting device of the present invention, the Fresnel lens sheet - light Motasa directivity by placing bets in front of the light source, corresponding to the arranged reflecting plate on the bottom without diffusing While being irradiated into the space formed of the installed diffuser in position, by arranging the angle at which the light beams emitted in this case the diffuser is projected evenly, be obtained without loss and uniform surface emission properties it is obtained by a configuration that can be. また、本発明の面発光装置では、 Further, the surface emitting device of the present invention,
拡散板に照射された光束をまんべんなく投射する為に、 To evenly projecting the light beam irradiated on the diffusion plate,
拡散板を水平に保つことができなかった。 I could not keep the diffuser horizontally. 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。 The application of the surface light-emitting device may diffuser is desired so-called flat shape in the horizontal state, the Fresnel lens sheet - DOO was placed on the light axis and the horizontal direction, the diffusion in which sheet - light source by superimposing bets decreasing light energy as the distance from - those which attained attenuation compensation - improving the transmission of light energy by and inclined proportionally the bottom reflector of the distance from the light source. 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− Furthermore, in the surface emitting device of the present invention, a Fresnel lens sheet directly under the diffusion plate - in the structure of mounting the door, the bottom reflector and the Fresnel lens sheet - by the light diffusing paint parallel space formed by preparative Guradie as inversely proportional to the distance and the illumination from the light source side -
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。 Shonpata - By down to place the light-emitting auxiliary plate printed, can be configured to further improve the emission luminance performance and uniformity ratio.

【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。 [0006] In the conventional acrylic light guide plate or the like, but silica powder and titanium oxide pigments are used, it is appropriate to use a higher diffusion efficiency non-organic compounds in the present invention. 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。 As for the material of the bottom reflector, preferably high desirably of light reflectance, also, the diffusion plate high diffusivity, and with less transmission loss is desired. 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− The bottom reflector of the present invention, ready availability, cost, smoothness, flatness, a highly reflective aluminum sheet because of such heat radiation, also the reflection plate very small bi -'s powder co -
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。 It is appropriate to adopt the coating polyester film. 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。 Further, the material of the light-emitting auxiliary plate is of a transparent film-like, transparent, it is desirable to use a material in which excellent heat-durability. 本発明では125μポリエステル・フィルムを用いている。 In the present invention, with reference to 125μ polyester film. 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。 Further, where the light-diffusing ink used good diffusion efficiency, it is desirable to use a material in which 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。 [0007] To determine arranged in a shape exhibited why the parabolic diffusion plate, for example, the cross-sectional shape is in linear arrangement such that wedge, luminous energy of the lamp unit near - too high the overall luminance balance Te is because that can not be taken. 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。 This Fresnel lens sheet mentioned above - presumed that it and to have a diffusion angle of bets about 1 ° Nevertheless focusing characteristic is small, the error of the surface finish accuracy of the bottom reflector plate are affecting This is because is.

【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、 [Action] In the surface emitting device of the present invention configured as described above, the Fresnel lens sheet - light Motasa directivity by placing bets in front of the light source is disposed on the bottom surface without diffusing reflection a plate, which in irradiates the space consisting of the installed diffuser in a corresponding position, since the diffusion plate is disposed at an angle which the light beam is irradiated is uniformly projected,
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。 Work can be obtained without loss and uniform surface emission properties. 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− Also, the Fresnel lens sheet - DOO was placed on the light axis and the horizontal direction, to which the diffusion sheet - reduced light energy as the distance from the light source by superimposing bets -
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。 It acts as attained the attenuation compensation - to improve the transfer property, light energy by and inclined proportionally the bottom reflector of the distance from the light source. 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。 Furthermore, the parallel space formed by the bottom surface reflector and Fresnel lens, Guradie as inversely proportional to the distance and the illumination from the light source side by the light diffusing paint - Shonpata - placing the light-emitting auxiliary plate down is printed by, it serves to further improve the emission luminance performance and uniformity ratio 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。 EXAMPLES An embodiment of the present invention will be described below.
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。 Figure 1 is a schematic explanatory perspective view of a surface emitting device in the case of using a single light source, FIG. 2 is a Fresnel lens sheet - explanatory perspective view installed in front the door, Figure 3 is a Fresnel lens sheet - bets optical properties explanatory view showing, Fig. 4 is a Fresnel lens sheet when mounting the lamp case - without the bets - Fresnel lens sheet when fitted with a diagram showing optical characteristics of a state with the door, Fig. 5 is also the lamp case is an explanatory view showing the optical characteristics of the 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 [0010] Example 1 FIG. 1-2, using a single light source 1, a Fresnel lens having a prism-shaped protrusions 11 on the front surface of the light source 1 sheet - DOO 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。 The a installed configuration, lamp case 3 is formed by a material that light reflectivity was affixed evaporated silver film or the like in a good aluminum sheet or the inner surface. (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。 (Hereinafter lamp unit hereinafter) to lower the contact position of the lamp unit is installed bottom reflector 5, diffuser plate 6 from above draws a gentle parabola in contact with the end of the bottom reflector 5 disposed It is. 2はランプ・リード線である。 2 is a lamp leads. 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。 Figure 3 is a Fresnel lens sheet - shows the bets optical properties, the light source 1 respectively, the Fresnel lens sheet - represents the bets 4 section, arrows indicate the traveling direction of the ray. 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、 The light emitted from the light source 1 is radiated light having no directivity, but the Fresnel lens sheet - light incident on bets 4 are aligned internally,
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。 Emitted from the prism-shaped vertex 12 are given directivity. 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。 For focusing characteristics of the light beam at this time is spread angle of about 1 ° with that of the highest light collection efficiency prism section.
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。 Figure 5 is a Fresnel lens sheet when mounting the lamp case - shows the optical characteristics of the state without a bets, light from the light source 1 is of or the lamp casing 3 reflects on the inner surface wall of the lamp case 3 While being irradiated directly from the light source 1 toward the outside without reflection to the wall, while the Fresnel lens sheet in FIG. 4 - light incident on the DOO 4 is given directivity from prismatic vertices 12 are aligned internally illuminated shows a state that is.

【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 [0011] configured surface emission device as above may luminance balance of the whole, resulting emission luminance than the acrylic light guide plate type backlight having a capacity comparable 2-3
倍、また重量は4分の1程度であった。 Fold, also weight was about a quarter. 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 That changed by the light emission luminance / weight ratio the overall capacitance, but is the more further gap if those large spreads, especially for weight, in the surface emitting device of the above embodiment 1, the light emitting surface 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 magnitude of the mm × 120 mm, 2 to 3 times compared to the overall brightness the backlight, a weight showed about one quarter.

【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。 [0012] Fresnel lens directly under Example 2 Figure 6 diffuser sheet - schematic perspective view before mounting the the provided diffuser DOO, 7 Fresnel lens sheet directly under the diffusion plate - mounted diffuser plate is provided at the door it is a cross sectional view of the surface light-emitting device. 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。 In Figure 6-7, the position in contact with the lamp unit bottom is provided a bottom reflector 5, termination top Fresnel lens sheet - cross section so as to be in contact with the bets 7 are formed by a parabola. 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。 Lamp unit Fresnel lens from the upper sheet - DOO 7 is installed in a positional relationship as to be parallel to the optical beam axis emitted from the lamp unit is further installed to overlap the diffusion plate 6 thereon. 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。 Light energy emitted from the lamp unit - is consumed by light by sequentially diffuser plate 6, for reducing with increasing distance from the light source, although as it is not taken the luminance balance is placed on the light axis and the horizontal in the present invention a top Fresnel lens sheet within 7 incident light running, to enhance the distant transmissibility was. 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。 The cross-sectional shape to increase draw a gentle parabola according even bottom reflector 5 go far, light energy emitted from the vicinity of the lamp unit bottom - is formed to deliver efficiently 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。 [0013] In the surface-emitting device prepared by Example 2, play about 30% reduction in total capacity ratio although inferior about 5% emission luminance performance than that of the surface emitting device of Example 1, videos high efficiency emission luminance performance rather than performance ratio of the same capacity acrylic light guide plate type backlight.

【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 [0014] EXAMPLE 3 FIG. 8 is a sectional view of a surface emitting device of claim 3, wherein, the bottom reflector 5 at a position in contact with the lamp unit lower
が置かれ、終端部には後面反射板9が設置されている。 Is placed, the end portion back reflective plate 9 is installed.
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。 Further, from the lamp unit top according to claim 2, wherein the surface emitting device similarly to the upper surface Fresnel lens to be parallel positional relationship with the light beam axis - are placed superimposed bets 7 and the diffusing plate 6. 発光補助板8の材質は透明フィルム状のもので、 The material of the light-emitting auxiliary plate 8 is intended transparent film form,
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。 Permeability, heat resistance, it is preferable to use a material in which excellent durability. 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。 Example 3 corresponds to the third aspect uses a polyester film having a thickness of 125.
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、 Further non-reflective coating 10 for suppressing the irregular reflection from the bottom reflector 5 made in the vicinity of the lower lamp, which a continuous as inversely proportional to the distance and the illumination from the light source side Guradie - Deployment & patterns - down emitting auxiliary plate 8 is that but is printed,
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。 Is at the end is placed in 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。 [0015] In the surface emitting device of the second aspect, the optical energy of the far portion by tilting the bottom reflector 5 - although had to compensate for the attenuation, the light-emitting auxiliary plate 8 in claim 3, wherein this is achieved. 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 I.e. the surface emitting device according to claim 2, wherein were those cross-sectional shape of the bottom reflector 5 is required to significantly high processing accuracy when even slightly to have drawn a gradual square preparation form, according to claim 3 emitting auxiliary plate 8 is the apparatus described has good workability because a film shape, further claims of the same capacity in the emission performance 2
の面発光装置のそれを上回る性能のものが得られた。 Those outperforms that of the surface light-emitting device was obtained. 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。 Incidentally, Guradie applied to the light-emitting auxiliary plate 8 - Deployment & patterns - for even down is the same no change and techniques found in many light emitting method of an acrylic light guide plate, for example, be reconstructed design criteria not required. 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。 Incidentally, there has been described one embodiment of the present invention, the present invention is also included in the present invention if there is not limited to the above embodiments, and design changes without departing from the scope of the present invention .

【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。 According to the configuration of the present invention, the high cost in side-edge type backlight using the conventional acrylic light guide plate, to eliminate the drawback luminescent drop during increased weight and thickness, and basic in conventional without changes and modifications of the design, it is possible to obtain simplicity of the design and manufacturing, the uniformity of emission, the durability and the like. 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。 Further, without stopping to an alternative of the acrylic light guide plate, the conventional LCD backlights, other such illuminations signboard, an effect such that can be applied up to the field of general lighting fixtures and the like.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【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。 1 is a schematic explanatory perspective view of a surface emitting device in the case of using a single light source.

【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。 [Figure 2] Fresnel lens sheet - is an explanatory perspective view of placed bets in front.

【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。 [Figure 3] Fresnel lens sheet - is an explanatory view showing the bets optical properties.

【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。 [4] Fresnel the lamp case at the time of mounting the lens sheet - is an explanatory diagram showing optical characteristics of a state with the door.

【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。 [5] Fresnel lenses when wearing the lamp case sheet - is an explanatory view showing the optical characteristics of the state having no bets.

【図6】拡散板を装着前の概略斜視図である。 6 is a schematic perspective view of a prior mounting the diffuser.

【図7】拡散板を装着した面発光装置の断面説明図である。 7 is a cross-sectional view of a surface emitting device equipped with a diffuser.

【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。 8 is a cross-sectional view of a surface light-emitting device having a light-emitting auxiliary plate.

【符号の説明】 DESCRIPTION OF SYMBOLS

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 leads 3 lamp case 4 Fresnel lens sheet 5 bottom reflector plate 6 diffuser 7 top Fresnel lens sheet 8 emitting an auxiliary plate 9 rear reflector 10 non-reflective coating 11 prismatic projections 12 vertices

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 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(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 was placed on at least one round edge of the rectangular peripheral frame, a transparent sheet having a prismatic projections which are arranged parallel to the surface in front of the light source - DOO (hereinafter referred Fresnel lens sheet) is placed It is, to become as by irradiating light of the light source in space consisting of a diffusion plate disposed at a position corresponding to the bottom surface reflection plate disposed on a bottom surface allowed to evenly emit diffuser surface emitting device according to claim.
  2. 【請求項2】 前記拡散板の直下にフレネルレンズシ− 2. A Fresnel lens sheet immediately below the diffusing plate -
    トを装着してなる請求項1記載の面発光装置。 Made by mounting the door claim 1 surface emitting device according.
  3. 【請求項3】 前記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− Wherein as inversely proportional to the distance and the illumination from the light source side by the light diffusing paint in the space portion Guradie -
    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。 Deployment - pattern - emission is by mounting a light-emitting auxiliary plate printed claims 1 and 2 surface emitting device according.
JP3444795A 1995-01-30 1995-01-30 Surface light emitting device Pending JPH08254617A (en)

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

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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JPH09281338A (en) * 1996-03-19 1997-10-31 Chukyo Koden Kofun Yugenkoshi Back light system of liquid crystal display panel
US6636283B2 (en) 2000-03-31 2003-10-21 Mitsubishi Denki Kabushiki Kaisha Front light, reflective liquid crystal display device and personal digital assistant
WO2013173760A1 (en) * 2012-05-18 2013-11-21 Reald Inc. Source conditioning for imaging directional backlights
US8651726B2 (en) 2010-11-19 2014-02-18 Reald Inc. Efficient polarized directional backlight
US8917441B2 (en) 2012-07-23 2014-12-23 Reald Inc. Observe tracking autostereoscopic display
US9188731B2 (en) 2012-05-18 2015-11-17 Reald Inc. Directional backlight
US9237337B2 (en) 2011-08-24 2016-01-12 Reald Inc. Autostereoscopic display with a passive cycloidal diffractive waveplate
US9235057B2 (en) 2012-05-18 2016-01-12 Reald Inc. Polarization recovery in a directional display device
US9250448B2 (en) 2010-11-19 2016-02-02 Reald Inc. Segmented directional backlight and related methods of backlight illumination
US9350980B2 (en) 2012-05-18 2016-05-24 Reald Inc. Crosstalk suppression in a directional backlight
US9420266B2 (en) 2012-10-02 2016-08-16 Reald Inc. Stepped waveguide autostereoscopic display apparatus with a reflective directional element
US9429764B2 (en) 2012-05-18 2016-08-30 Reald Inc. Control system for a directional light source
US9436015B2 (en) 2012-12-21 2016-09-06 Reald Inc. Superlens component for directional display
US9482874B2 (en) 2010-11-19 2016-11-01 Reald Inc. Energy efficient directional flat illuminators
US9551825B2 (en) 2013-11-15 2017-01-24 Reald Spark, Llc Directional backlights with light emitting element packages
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US10126575B1 (en) 2017-05-08 2018-11-13 Reald Spark, Llc Optical stack for privacy display
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US10473947B2 (en) 2010-11-19 2019-11-12 Reald Spark, Llc Directional flat illuminators
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