JPH0694923A - Thin-walled light box - Google Patents
Thin-walled light boxInfo
- Publication number
- JPH0694923A JPH0694923A JP3274447A JP27444791A JPH0694923A JP H0694923 A JPH0694923 A JP H0694923A JP 3274447 A JP3274447 A JP 3274447A JP 27444791 A JP27444791 A JP 27444791A JP H0694923 A JPH0694923 A JP H0694923A
- Authority
- JP
- Japan
- Prior art keywords
- light
- guide plate
- light guide
- pattern
- reflection pattern
- 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)
- Optical Elements Other Than Lenses (AREA)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は写真修正などに使用され
るライトテーブルや液晶表示装置用バックライトの様な
所謂薄型ライトボックスに関するものであり、更に詳し
くは反射パターンを有する導光板を構成要件とするバッ
クライトに係るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called thin light box such as a light table used for photo correction or a backlight for a liquid crystal display device, and more specifically to a light guide plate having a reflection pattern. And the backlight.
【０００２】[0002]
【従来の技術】通常、導光板を構成要素とする薄型ライ
トボックスでは片方の面に細線状又は網点状の反射パタ
ーンを設けた導光板の側端面に対向して光源を設け、該
側端面から導入した光を前記反射パターンで反射させて
反射パターンに対向する照光面へ取り出す様になってお
り、照光面の明るさを均一にするために反射パターンの
密度は光源からの距離に応じて変えてある。2. Description of the Related Art Usually, in a thin light box having a light guide plate as a constituent element, a light source is provided facing a side end face of a light guide plate having a reflection pattern of a thin line or halftone dot on one side thereof. The light introduced from the above is reflected by the reflection pattern to be extracted to the illumination surface facing the reflection pattern, and the density of the reflection pattern depends on the distance from the light source in order to make the brightness of the illumination surface uniform. I have changed.
【０００３】一般に、照光面をより明るく且つ均一にす
るために前記反射パターンには高い反射率とすぐれた光
拡散反射性（乱反射性）が要求され、特にカラー画像用
ライトボックスにあっては色調の再現性にも高い忠実性
が求められる。従来、この様な導光板の反射パターンと
してはサンドブラストなどによって形成したマット状パ
ターンやアルミなどの金属蒸着パターン或いは白色顔料
インクによる印刷パターンなどが用いられており、光拡
散性を増すために塗膜中にガラスビーズを分散させるこ
ともあった。Generally, in order to make the illuminated surface brighter and more uniform, the reflection pattern is required to have a high reflectance and an excellent light diffuse reflectance (diffuse reflectance). High fidelity is also required for reproducibility. Conventionally, as a reflection pattern of such a light guide plate, a matte pattern formed by sandblasting, a metal deposition pattern such as aluminum, or a printing pattern using a white pigment ink is used, and a coating film is added to increase light diffusion. In some cases, glass beads were dispersed therein.
【０００４】然し乍ら、前述した従来の反射パターンの
うちマット状反射パターンは導光板内を進行する光を導
光板表面に形成した微細な凹凸面で反射させるものであ
って、反射面が導光板の厚み方向に単層であるために光
の漏減が多く、従って充分な明るさを得られない欠点が
あり、金属蒸着膜を用いたものはパターン表面が正反射
面であるために光の拡散性に乏しく、従って照光面にお
ける光の均一性を維持するためにはパターンの形状とラ
イトボックスの組立に極めて高い精度が要求される欠点
と金属に由来する光の吸収のために色ズレを起す欠点が
あった。However, among the above-mentioned conventional reflection patterns, the matte reflection pattern reflects the light traveling in the light guide plate by the fine uneven surface formed on the surface of the light guide plate, and the reflection surface is the light guide plate. Since it is a single layer in the thickness direction, there is a lot of light leakage, so there is a drawback that sufficient brightness cannot be obtained.The one using a metal deposition film diffuses the light because the pattern surface is a specular surface. Therefore, in order to maintain the uniformity of the light on the illuminated surface, the shape of the pattern and the assembling of the light box require extremely high precision, and there is a color shift due to the absorption of light from the metal. There was a flaw.
【０００５】一般に異る媒質の界面における反射率や拡
散性はこれ等媒質間の相対屈折率が大きいほど大きくな
るが、反射パターンに白色顔料やガラスビーズを用いた
導光板では白色顔料やガラスビーズの導光板に対する相
対屈折率がこれ等の空気に対する相対屈折率よりも小さ
くなるために導光板内を進行する光が該反射パターンで
反射される際の反射率や拡散性は空気中を進行する光が
これ等の反射パターンで反射されるとき程に大きくはな
く、従って光の有効利用率がそれだけ低くなり照光面が
暗くなる欠点があった。Generally, the reflectance and diffusivity at the interface of different media increase as the relative refractive index between these media increases, but in a light guide plate using a white pigment or glass beads for the reflection pattern, white pigment or glass beads are used. Since the relative index of refraction to the light guide plate is smaller than the relative index of refraction to air, the reflectance and diffusivity when the light traveling in the light guide plate is reflected by the reflection pattern travels in the air. There is a drawback in that the light is not as great as when reflected by these reflection patterns, and therefore the effective utilization rate of the light is so low that the illuminated surface becomes dark.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、従来の装置
における前述した欠点を除去して色ズレがなく組立、製
作が容易でしかも光の利用効率にすぐれた明るい薄型ラ
イトボックスを提供することを目的としている。SUMMARY OF THE INVENTION It is an object of the present invention to provide a bright thin light box which eliminates the above-mentioned drawbacks of the conventional device, is easy to assemble and manufacture without color shift, and is excellent in light utilization efficiency. It is an object.
【０００７】[0007]
【課題を解決するための手段】本発明では前述した課題
を解決するために、反射パターンを有する導光板を構成
要素とするライトボックスにおいて、前記導光板を透光
性部材に微小気泡の集合体よりなる反射パターンを設け
て形成し、前記微小気泡よりなる反射パターンは光感応
性発泡剤を含有する透光性樹脂層に光を照射することに
よって形成する場合と、熱感応性発泡剤を含む透光性樹
脂層を加熱することによって形成する場合を含んでい
る。In order to solve the above-mentioned problems, the present invention is directed to a light box having a light guide plate having a reflection pattern as a constituent element, wherein the light guide plate is a translucent member and an assembly of micro bubbles. And the heat-sensitive foaming agent is formed by irradiating the light-transmitting resin layer containing the light-sensitive foaming agent with light. It includes the case of forming the transparent resin layer by heating.
【０００８】[0008]
【作用】次に本発明の作用を図に基づいて説明する。図
１（ａ）は本発明の一実施例のライトボックスの断面を
示す図であり、図１（ｂ）は図１（ａ）における導光板
２の部分拡大図であり、図１（ｃ）は図１（ａ）におけ
る反射パターン３を模式的に拡大した平面図である。こ
れ等の図に示す薄型ライトボックスは上面が開放された
偏平筐体状のハウジング５の内部に、下面に反射パター
ン３を有する導光板２を収納し、導光板２の側端面４に
対向して光源１を設け、導光板２の上面に対向して設け
た光透過拡散板７でハウジング５の開放面を覆った構造
になっており、光源１の光は前記側端面４から導光板２
内に導入され、その内面で反射を繰返しながら導光板２
内を進み、反射パターン３によって反射されて光透過拡
散板７に照射され、ここに照光面１３を形成する様にな
っている。Next, the operation of the present invention will be described with reference to the drawings. 1A is a view showing a cross section of a light box according to an embodiment of the present invention, FIG. 1B is a partially enlarged view of a light guide plate 2 in FIG. 1A, and FIG. FIG. 2 is a plan view schematically enlarging a reflection pattern 3 in FIG. In the thin light box shown in these drawings, a light guide plate 2 having a reflection pattern 3 on the lower surface is housed in a flat housing-like housing 5 having an open upper surface, and the light guide plate 2 faces the side end surface 4 of the light guide plate 2. The light source 1 is provided as a light source, and the open surface of the housing 5 is covered with a light transmitting / diffusing plate 7 that is provided so as to face the upper surface of the light guide plate 2.
The light guide plate 2 is introduced inside and repeats reflection on its inner surface.
After passing through the inside, it is reflected by the reflection pattern 3 and is irradiated on the light transmission diffusion plate 7, and the illumination surface 13 is formed there.
【０００９】反射パターン３は導光板２の基体１０であ
るアクリル樹脂やガラスの様な高屈折率透光性部材に形
成した微小気泡１０の集合体よりなる網点状のパターン
で、光源１からの距離が大きくなるに従って網点密度を
大きくして照光面の明るさが均一になる様にしてある。
この様に微小気泡の集合体よりなる本発明の反射パター
ンでは導光板２内を進んできた光の反射は微小気泡９と
導光板基体１０の界面で行われることになるが、気泡の
絶対屈折率が小さいので絶対屈折率の大きい白色顔料や
ガラスビーズを用いた従来の反射パターンに比べて反射
特性を左右する反射界面における相対屈折率が極めて大
きいから反射性にすぐれている。The reflection pattern 3 is a halftone dot pattern composed of an assembly of micro-bubbles 10 formed on a high-refractive-index translucent member such as acrylic resin or glass which is the base 10 of the light guide plate 2. The dot density is increased as the distance is increased so that the brightness of the illuminated surface becomes uniform.
As described above, in the reflection pattern of the present invention composed of an aggregate of minute bubbles, the reflection of the light traveling in the light guide plate 2 is performed at the interface between the minute bubbles 9 and the light guide plate substrate 10. Since the refractive index is small, the relative refractive index at the reflective interface that influences the reflective characteristics is extremely large as compared with the conventional reflective pattern using a white pigment or glass beads having a large absolute refractive index, and thus the reflective property is excellent.
【００１０】また、反射パターンを形成する微小気泡９
は前述した様に導光板基体１０よりも絶対屈折率が小さ
く、しかも球状であるから凹レンズの様に入射した光を
屈折拡散し、その上微小気泡が集合体をなしているので
前述した屈折拡散は重畳してなされることになる。従っ
て、本発明の反射パターンは従来の反射パターンに比べ
て反射性のほか拡散性においても極めてすぐれている。
更に本発明の反射パターン３は導光板基体１０に形成し
た気泡そのものであるから基体１０内を進む光に対して
反射界面で波長シフトを起こす様なことがなく、従って
色ズレを生じない。Also, the micro-bubbles 9 forming the reflection pattern
As described above, since the absolute refractive index is smaller than that of the light guide plate substrate 10 and the spherical shape is spherical, the incident light is refracted and diffused like a concave lens, and the microscopic bubbles form an aggregate. Will be superposed. Therefore, the reflection pattern of the present invention is extremely superior in terms of reflectivity and diffusivity to the conventional reflection pattern.
Further, since the reflection pattern 3 of the present invention is the bubbles themselves formed on the light guide plate base body 10, there is no wavelength shift at the reflection interface with respect to the light propagating in the base body 10, and therefore no color shift occurs.
【００１１】微小気泡の集合体よりなる本発明の反射パ
ターン３は例えば光分解によって窒素ガスを発生するジ
アゾニウム塩の様な所謂光感応性発泡剤を含有する透光
性樹脂層に光を照射して形成するか、熱分解によって窒
素ガスを発生するアゾビスイソブチロニトリルの様な所
謂熱感応性発泡剤を含有する透光性樹脂層を加熱するこ
とによって形成するが、いづれの場合も光又は熱によっ
て分解した発泡剤の分解ガス成分は樹脂層を加熱するこ
とによって任意の大きさの微小気泡に成長させて、これ
を集合体に形成する。The reflection pattern 3 of the present invention, which is composed of aggregates of microbubbles, irradiates a light-transmitting resin layer containing a so-called light-sensitive foaming agent such as a diazonium salt which generates nitrogen gas by photolysis with light. Formed by heating, or by heating a translucent resin layer containing a so-called heat-sensitive foaming agent such as azobisisobutyronitrile which generates nitrogen gas by thermal decomposition. Alternatively, the decomposed gas component of the foaming agent decomposed by heat is heated in the resin layer to grow into minute bubbles of an arbitrary size and are formed into an aggregate.
【００１２】[0012]
【実施例−１】図１の薄型バックライトにおいて、厚さ
４ｍｍの透明アクリル樹脂製の導光板基体１０の一方の
面に 塩化ビニリデンアクリロニトリル共重合体 １７．０部 ポリメチルメタクリレート ９．０部 パラジアゾメチルアニリン塩化亜鉛 ２．０部 メチルエチルケトン ６０．０部 メチルアルコール １２．０部 よりなる発泡剤組成物を塗布し、乾燥後の厚みが２０μ
ｍになる様にする。次に、この塗布層を図２（ａ）に示
す様にパターン状に露光すると露光部分には光感応性発
泡剤であるパラジアゾメチルアニリン塩化亜鉛の光分解
によって窒素ガスが発生し、塗布層を露光後速やかに９
０〜１２０℃に加熱すると塗布層中の樹脂の軟化につれ
て前記窒素ガスが膨張して図２（ｂ）に示す様に露光部
分に１〜２μｍの大きさの微小気泡の集合体よりなる反
射性の白色パターンが形成される。更に図２（ｃ）に示
す様にこの塗布層の全面を露光して残存発泡剤を分解し
たる後４０〜６０℃の比較的低温で加熱すると窒素ガス
は微小気泡に成長することなく大気中に散逸して前記白
色パターンは定着される。Example 1 In the thin backlight of FIG. 1, a vinylidene chloride acrylonitrile copolymer 17.0 parts polymethylmethacrylate 9.0 parts para was formed on one surface of a transparent acrylic resin light guide plate substrate 10 having a thickness of 4 mm. Diazomethylaniline zinc chloride 2.0 parts Methyl ethyl ketone 60.0 parts Methyl alcohol 12.0 parts A foaming agent composition is applied and the thickness after drying is 20μ.
Make it m. Next, when this coating layer is exposed in a pattern as shown in FIG. 2 (a), nitrogen gas is generated in the exposed portion by photolysis of paradiazomethylaniline zinc chloride, which is a photosensitive foaming agent, and the coating layer is exposed. Immediately after exposure to 9
When heated to 0 to 120 ° C., the nitrogen gas expands as the resin in the coating layer softens, and as shown in FIG. 2 (b), the reflectivity of aggregates of microbubbles having a size of 1 to 2 μm in the exposed portion. White pattern is formed. Further, as shown in FIG. 2 (c), after exposing the entire surface of this coating layer to decompose the remaining foaming agent and then heating at a relatively low temperature of 40 to 60 ° C., nitrogen gas does not grow into fine bubbles in the atmosphere. And the white pattern is fixed.
【００１３】かくして出来た導光板を装着した図１に示
す本発明のバックライトは照光面の輝度が５００カンデ
ラ／ｍ２で、これは白色顔料を反射パターンに用いた従
来の導光板を使用した場合に比べて約２０％明るく、ガ
ラスビーズを用いた従来のものに比べて１５％以上の明
るさであった。また本実施例のバックライトは金属蒸着
パターンを用いた場合に比べ精度が１／５でよく組立が
極めて容易であった。The backlight of the present invention shown in FIG. 1 equipped with the light guide plate thus produced has a brightness of 500 candela / m 2 on the illuminated surface, which uses a conventional light guide plate using a white pigment as a reflection pattern. The brightness was about 20% brighter than the case, and 15% or more brighter than the conventional one using glass beads. In addition, the backlight of this example had an accuracy of ⅕ as compared with the case of using a metal vapor deposition pattern, and was extremely easy to assemble.
【００１４】本実施例において発泡剤組成物を塗布後の
反射パターン生成過程の順序を図３（ａ）、（ｂ）、
（ｃ）、（ｄ）に示す様にパターン露光、低温加熱、全
面露光、高温加熱とすると生成反射パターンを図２に示
したものの反転パターンとすることが出来る。本発明の
光感応性発泡剤として使用し得るジアゾニウム塩には前
述のもののほか、Ｐ−ジメチルアミノベンゼンジアゾニ
ウム塩、Ｐ−ジエチルアミノベンゼンジアゾニウム塩、
Ｐ−ジフェニルアミンジアゾニウム塩、１−ジアゾ−２
−オキシナフタレン−４−スルフォネート等の様に光分
解によって窒素ガスを発生するジアゾニウム塩がある。
また、本発明の光感応性発泡剤としてはこの様なジアゾ
ニウム塩のほか光照射によって直接間接に気体を発生す
るものは何でも使用することが出来る。In this example, the order of the reflection pattern generation process after applying the foaming agent composition is shown in FIGS.
As shown in (c) and (d), when the pattern exposure, the low temperature heating, the entire surface exposure, and the high temperature heating are performed, the generated reflection pattern can be an inverted pattern of that shown in FIG. The diazonium salt that can be used as the light-sensitive foaming agent of the present invention includes, in addition to those described above, P-dimethylaminobenzenediazonium salt, P-diethylaminobenzenediazonium salt,
P-diphenylamine diazonium salt, 1-diazo-2
There are diazonium salts such as oxynaphthalene-4-sulfonate which generate nitrogen gas by photolysis.
Further, as the light-sensitive foaming agent of the present invention, in addition to such a diazonium salt, any one which directly or indirectly generates a gas by light irradiation can be used.
【００１５】[0015]
【実施例−２】厚さ３ｍｍの透明樹脂製の導光板基体の
表面に ２，２´−アゾビス（イソブチロニトリル） ５．０部 セルローズアセテートプロピオネート樹脂 ５．０部 メチルセルローズ樹脂 ３．０部 ＭＥＫ ８７．０部 よりなる組成物を乾燥後の塗布層の厚さが３０μｍにな
る様に塗布する。乾燥後の塗布層を１０５〜１１０℃で
パターン状に加熱すると図４（ｂ）に示す様に加熱部分
の２，２´−アゾビス（イソブチロニトリル）は分解し
て窒素ガスを発生し、この窒素ガスは樹脂の軟化に応じ
て膨張して５〜１０μｍの均一な微小気泡の集合体とな
る。この様にして形成した本発明の導光板を図１のバッ
クライトに装着して従来の導光板と比較すると、本発明
の導光板を装着した場合の照光面の輝度は４３０カンデ
ラ／ｍ２で従来のものに比べて２０％以上明るく、しか
も色ズレは全く生じなかった。また、光拡散性にすぐれ
ているために高い組立精度を必要としないので組立の作
業性を向上させることが出来、しかも照光面の光拡散板
７を薄くすることが出来るので一層明るくすることが可
能になった。[Example-2] 2,2'-azobis (isobutyronitrile) 5.0 parts Cellulose acetate propionate resin 5.0 parts Methylcellulose resin 3 on the surface of a light guide plate substrate made of a transparent resin having a thickness of 3 mm 0.0 part MEK 87.0 parts of a composition is applied so that the thickness of the coating layer after drying will be 30 μm. When the coating layer after drying is heated in a pattern at 105 to 110 ° C., 2,2′-azobis (isobutyronitrile) in the heated portion is decomposed to generate nitrogen gas as shown in FIG. 4B. The nitrogen gas expands in accordance with the softening of the resin to form a uniform aggregate of fine bubbles of 5 to 10 μm. When the light guide plate of the present invention thus formed is attached to the backlight of FIG. 1 and compared with the conventional light guide plate, the brightness of the illuminated surface when the light guide plate of the present invention is attached is 430 candelas / m 2 . It is brighter than the conventional one by 20% or more, and no color shift occurs. Further, since it has excellent light diffusivity, it does not require high assembly precision, so that the workability of assembly can be improved, and the light diffusing plate 7 on the illuminated surface can be made thinner, so that it can be made even brighter. It became possible.
【００１６】本発明の熱感応性発泡剤としては前掲の
２，２´−アゾビス（イソブチロニトリル）のほかベン
ゼンスルホニルヒドラジドやＰ−トルエンスルホニルヒ
ドラジド、アゾジカルボキシジエチルエステル、ジニト
ロソペンタメチレンテトラミン等の熱分解性発泡剤やそ
の他加熱によって発泡する公知の熱感応性発泡剤を用い
ることが出来る。熱感応性発泡剤を用いて微小気泡の集
合体よりなる反射パターンを作るには図４の方法以外に
図５に示した様に予め塗布層を導光板基体の表面にパタ
ーン状に設け、乾燥後全面を加熱しても作ることが出来
る。前述した図４の方法において非パターン部の発泡性
を停止して反射パターンを定着するには塗布層に使用す
る樹脂の軟化温度を高くしておき、パターン形成後全面
を発泡温度よりも高く軟化温度よりも低く加熱すると発
生ガスは発泡することなく表面に散逸して反射パターン
が定着される。Examples of the heat-sensitive foaming agent of the present invention include 2,2'-azobis (isobutyronitrile) described above, benzenesulfonyl hydrazide, P-toluenesulfonyl hydrazide, azodicarboxydiethyl ester and dinitrosopentamethylenetetramine. It is possible to use a heat-decomposable foaming agent such as the above or a known heat-sensitive foaming agent that foams by heating. In order to form a reflection pattern composed of aggregates of micro bubbles using a heat-sensitive foaming agent, a coating layer is previously provided in a pattern on the surface of the light guide plate substrate as shown in FIG. 5 in addition to the method of FIG. 4 and dried. It can also be made by heating the entire back surface. In the method of FIG. 4 described above, in order to stop the foaming property of the non-pattern portion and fix the reflection pattern, the softening temperature of the resin used for the coating layer is set high, and after the pattern formation, the entire surface is softened to a temperature higher than the foaming temperature. When heated below the temperature, the evolved gas does not foam and is diffused to the surface to fix the reflection pattern.
【００１７】本発明における導光板基体は透明性に富
み、絶対屈折率が大きいことがのぞましく、アクリル樹
脂のほか塩化ビニル樹脂、塩化ビニリデン樹脂、ポリエ
ステル等公知の広い範囲の透明樹脂やガラス等が使用出
来るが、塗布層との屈折率の差が小さいことがのぞまし
い。It is desirable that the light guide plate substrate in the present invention is rich in transparency and has a large absolute refractive index. In addition to acrylic resin, a wide range of known transparent resins such as vinyl chloride resin, vinylidene chloride resin and polyester, and glass. Etc. can be used, but it is desirable that the difference in refractive index from the coating layer is small.
【００１８】[0018]
【発明の効果】以上説明した様に本発明は導光板の反射
パターンを微小気泡の集合体で形成することによって反
射パターンの反射効率を大きく向上させるので光の利用
効率が大きく、従って極めて明るいバックライトを提供
するものである。As described above, according to the present invention, since the reflection pattern of the light guide plate is formed by the aggregate of the minute bubbles, the reflection efficiency of the reflection pattern is greatly improved, so that the light utilization efficiency is large and therefore the extremely bright background is obtained. It provides light.
【００１９】また、微小気泡の集合体で形成された反射
パターンは光の拡散性が極めてよいからバックライトの
組立に高い精度を不要として生産性を向上させたばかり
でなく、均一な照光面を得るための光透過拡散板を薄く
することが出来るのでそれだけ明るさを増すことが出来
る。Further, since the reflection pattern formed by the aggregate of the micro bubbles has a very good light diffusivity, not only does the precision of assembling the backlight not be required to improve the productivity, but also a uniform illuminated surface is obtained. Since the light transmission diffuser plate for making it thin can be made, the brightness can be increased accordingly.
【００２０】更に本発明の導光板では反射が微小気泡と
導光板基体の界面で行われるために光の色ズレがないか
ら本発明のバックライトはカラー画像の色再現性に極め
てすぐれている。Further, in the light guide plate of the present invention, since the reflection is performed at the interface between the fine bubbles and the light guide plate base, there is no color shift of the light, so that the backlight of the present invention is very excellent in color reproducibility of a color image.
【図１】（ａ）は本発明の一実施例のライトボックスの
断面図であり（ｂ）はその部分拡大断面図、（ｃ）は
（ａ）の部分平面図である。1A is a sectional view of a light box according to an embodiment of the present invention, FIG. 1B is a partially enlarged sectional view thereof, and FIG. 1C is a partial plan view of FIG. 1A.
【図２】本発明の原理を説明するための一実施例の部分
拡大断面図である。FIG. 2 is a partially enlarged sectional view of an embodiment for explaining the principle of the present invention.
【図３】本発明の原理を説明するための他の一実施例の
部分拡大断面図である。FIG. 3 is a partial enlarged sectional view of another embodiment for explaining the principle of the present invention.
【図４】本発明の更に他の一実施例の部分拡大断面図で
ある。FIG. 4 is a partial enlarged cross-sectional view of still another embodiment of the present invention.
【図５】本発明の原理を説明するための他の一実施例の
部分拡大断面図である。FIG. 5 is a partial enlarged cross-sectional view of another embodiment for explaining the principle of the present invention.
１ 光源 ２ 導光板 ３ 反射パターン ４ 側端面 ５ ハウジング ６ 先端部 ７ 光透過拡散板 ８ ランプハウジング ９ 気泡 １０ 導光板基体 １１ 切欠部 １２ バックライト １３ 照光面 １４ 塗布層 １５ 感光部分 １６ 加熱手段 DESCRIPTION OF SYMBOLS 1 light source 2 light guide plate 3 reflection pattern 4 side end surface 5 housing 6 tip part 7 light transmission diffuser plate 8 lamp housing 9 air bubble 10 light guide plate base 11 notch 12 backlight 13 illuminating surface 14 coating layer 15 photosensitive part 16 heating means
Claims (3)
とするライトボックスにおいて、前記導光板が透光性部
材に微小気泡の集合体よりなる反射パターンを設けて形
成された導光板であることを特徴とする薄型ライトボッ
クス。1. A light box comprising a light guide plate having a reflection pattern as a component, wherein the light guide plate is a light guide plate formed by providing a light transmissive member with a reflection pattern composed of an aggregate of microscopic bubbles. A characteristic thin light box.
ーンが光感応性発泡剤を含有する透光性樹脂層に光を照
射することに起因して形成された微小気泡の集合体より
なる反射パターンである特許請求の範囲第１項記載の薄
型ライトボックス。2. A reflection formed of an aggregate of microbubbles formed by irradiating a light-transmitting resin layer containing a photosensitive foaming agent with the reflection pattern formed of an aggregate of microbubbles. The thin light box according to claim 1, which is a pattern.
ーンが熱感応性発泡剤を含有する透光性樹脂層を加熱す
ることによって形成された微小気泡の集合体よりなる反
射パターンである特許請求の範囲第１項記載の薄型ライ
トボックス。3. The reflection pattern composed of an assembly of micro bubbles is a reflection pattern composed of an assembly of micro bubbles formed by heating a translucent resin layer containing a heat-sensitive foaming agent. 2. A thin light box according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3274447A JPH0694923A (en) | 1991-07-25 | 1991-07-25 | Thin-walled light box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3274447A JPH0694923A (en) | 1991-07-25 | 1991-07-25 | Thin-walled light box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0694923A true JPH0694923A (en) | 1994-04-08 |
Family
ID=17541818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3274447A Pending JPH0694923A (en) | 1991-07-25 | 1991-07-25 | Thin-walled light box |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0694923A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997001117A1 (en) * | 1995-06-23 | 1997-01-09 | The Furukawa Electric Co., Ltd. | Light reflection plate |
| US6415531B1 (en) | 1995-05-23 | 2002-07-09 | Sharp Kabushiki Kaisha | Plane-shaped lighting device and a display using such a device |
| JP2003092018A (en) * | 2001-09-19 | 2003-03-28 | Keiwa Inc | Reflection sheet and backlight unit using the same |
| JP2004302406A (en) * | 2003-03-14 | 2004-10-28 | Ricoh Co Ltd | Electrostatic latent image developing carrier |
| WO2007111353A1 (en) * | 2006-03-29 | 2007-10-04 | Oji Paper Co., Ltd. | Light diffuser, method for manufacturing light diffuser, surface emitting device, display device, and lighting system |
| CN103293588A (en) * | 2012-03-01 | 2013-09-11 | 鸿富锦精密工业（深圳）有限公司 | Light guide plate and backlight module |
| CN104199138A (en) * | 2014-08-19 | 2014-12-10 | 常熟昊虞电子信息科技有限公司 | Light guide plate for ultra-thin light box |
| CN105278101A (en) * | 2015-04-03 | 2016-01-27 | 惠科电子（深圳）有限公司 | Light guide plate netted point design method through laser processing |
| JP2017511787A (en) * | 2014-02-21 | 2017-04-27 | コーニング インコーポレイテッド | Layered glassy photosensitive article and method for producing the same |
| WO2020015401A1 (en) * | 2018-07-17 | 2020-01-23 | 惠科股份有限公司 | Manufacturing method for light guide plate and manufacturing method for display device |
| WO2020015399A1 (en) * | 2018-07-17 | 2020-01-23 | 惠科股份有限公司 | Light guide plate and display device |
-
1991
- 1991-07-25 JP JP3274447A patent/JPH0694923A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6415531B1 (en) | 1995-05-23 | 2002-07-09 | Sharp Kabushiki Kaisha | Plane-shaped lighting device and a display using such a device |
| WO1997001117A1 (en) * | 1995-06-23 | 1997-01-09 | The Furukawa Electric Co., Ltd. | Light reflection plate |
| US5844731A (en) * | 1995-06-23 | 1998-12-01 | The Furukawa Electric Co.,Ltd. | Light reflecting plate |
| JP2003092018A (en) * | 2001-09-19 | 2003-03-28 | Keiwa Inc | Reflection sheet and backlight unit using the same |
| JP4712252B2 (en) * | 2001-09-19 | 2011-06-29 | 恵和株式会社 | Reflective sheet and backlight unit using the same |
| JP2004302406A (en) * | 2003-03-14 | 2004-10-28 | Ricoh Co Ltd | Electrostatic latent image developing carrier |
| JP2007264343A (en) * | 2006-03-29 | 2007-10-11 | Oji Paper Co Ltd | Light diffusion body, manufacturing method of light diffusion body, surface light emitting device, display device, and illumination device |
| WO2007111353A1 (en) * | 2006-03-29 | 2007-10-04 | Oji Paper Co., Ltd. | Light diffuser, method for manufacturing light diffuser, surface emitting device, display device, and lighting system |
| CN103293588A (en) * | 2012-03-01 | 2013-09-11 | 鸿富锦精密工业（深圳）有限公司 | Light guide plate and backlight module |
| JP2017511787A (en) * | 2014-02-21 | 2017-04-27 | コーニング インコーポレイテッド | Layered glassy photosensitive article and method for producing the same |
| CN104199138A (en) * | 2014-08-19 | 2014-12-10 | 常熟昊虞电子信息科技有限公司 | Light guide plate for ultra-thin light box |
| CN105278101A (en) * | 2015-04-03 | 2016-01-27 | 惠科电子（深圳）有限公司 | Light guide plate netted point design method through laser processing |
| WO2020015401A1 (en) * | 2018-07-17 | 2020-01-23 | 惠科股份有限公司 | Manufacturing method for light guide plate and manufacturing method for display device |
| WO2020015399A1 (en) * | 2018-07-17 | 2020-01-23 | 惠科股份有限公司 | Light guide plate and display device |
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