JPH05477A - Brightness equalizing sheet and manufacture thereof - Google Patents
Brightness equalizing sheet and manufacture thereofInfo
- Publication number
- JPH05477A JPH05477A JP3177168A JP17716891A JPH05477A JP H05477 A JPH05477 A JP H05477A JP 3177168 A JP3177168 A JP 3177168A JP 17716891 A JP17716891 A JP 17716891A JP H05477 A JPH05477 A JP H05477A
- Authority
- JP
- Japan
- Prior art keywords
- light
- sheet
- light source
- compound
- brightness
- 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
- Liquid Crystal (AREA)
- Laminated Bodies (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は新規な輝度均一化シー
ト、及びその製造方法に関するものである。さらに詳し
くいえば、本発明は、光源からの光を透過させることに
より均一な輝度面が得られ、かつ光源エネルギーの損失
が少なく、特にバックライト型液晶表示装置や複写機な
どに好適に用いられる輝度均一化シート、及びこのもの
を効率よく製造する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel brightness uniformizing sheet and a method for manufacturing the same. More specifically, the present invention can obtain a uniform luminance surface by transmitting light from a light source, has a small loss of energy of the light source, and is particularly suitable for a backlight type liquid crystal display device or a copying machine. The present invention relates to a brightness uniformizing sheet and a method for efficiently manufacturing the same.
【０００２】[0002]
【従来の技術】従来、液晶表示装置、あるいは複写機な
どの露光装置においては、輝度むらや露光むらを防止す
るために、光源を増やしたり、反射板の形状を工夫する
などの方法が試みられている。しかしながら、これらの
方法は、装置をより軽量小型化する場合の障害となると
いう問題を有している。そのため、透光性シートに、光
源からの距離を考慮して、遮光性の点、線、帯などを設
け、このシートに光源からの光を通過させることによ
り、均一な輝度面を得る方法が提案されている。しかし
ながら、この方法は装置の小型化の障害にはならないも
のの、輝度の均一化については必ずしも十分でない。ま
た、実際に使用する場合と同一の条件や光源により、銀
塩を含む樹脂層を塗布したポジシートを露光し、現像す
ることによって、輝度の均一なシートを得る方法が提案
されている。しかしながら、この銀塩のような黒色の物
質をシート表面に分布させる方法は、光の吸収により光
源のエネルギーの損失を招くとともに、エネルギーの吸
収によりシート温度の上昇をもたらすという欠点を有し
ている。さらに、シート表面にアルミ箔などの光反射性
の材料を分布させる方法も知られているが、この方法
は、アルミ箔などを微細に分布させることが困難である
ため、十分に満足しうる輝度の均一化は得られにくい。2. Description of the Related Art Conventionally, in a liquid crystal display device or an exposure device such as a copying machine, in order to prevent uneven brightness and uneven exposure, methods such as increasing the number of light sources and devising the shape of a reflecting plate have been tried. ing. However, these methods have a problem that they become an obstacle in making the device lighter and smaller. Therefore, in consideration of the distance from the light source, the light-transmitting sheet is provided with light-shielding points, lines, bands, etc., and the light from the light source is passed through this sheet to obtain a uniform luminance surface. Proposed. However, although this method does not hinder the downsizing of the device, it is not always sufficient to make the brightness uniform. Further, a method has been proposed in which a positive sheet coated with a resin layer containing a silver salt is exposed and developed under the same conditions and light sources as in actual use to obtain a sheet having uniform brightness. However, this method of distributing a black substance such as a silver salt on the surface of the sheet has a drawback in that the absorption of light causes a loss of energy of the light source and the absorption of energy causes a rise in the sheet temperature. . Further, a method of distributing a light-reflecting material such as aluminum foil on the surface of the sheet is also known, but this method is difficult to distribute the aluminum foil or the like in a minute manner, and thus a sufficiently satisfactory brightness is obtained. Is difficult to obtain.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、このような
事情のもとで、光源からの光を透過させることにより、
十分に満足しうる均一な輝度面が得られ、かつ光源エネ
ルギーの損失が少ない上、温度上昇がないので、樹脂の
劣化をもたらすことがなく、大型はもちろん小型の装置
にも適用できる輝度均一化シートを提供することを目的
としてなされたものである。Under the circumstances described above, the present invention allows the light from the light source to pass therethrough.
A sufficiently satisfactorily uniform brightness surface is obtained, light source energy loss is small, and there is no temperature rise, so there is no deterioration of the resin, and brightness uniformity that can be applied to small as well as large devices. The purpose is to provide a seat.
【０００４】[0004]
【課題を解決するための手段】本発明者らは前記の好ま
しい性質を有する輝度均一化シートを開発すべく鋭意研
究を重ねた結果、マイクロフイルムなどで用いられてい
るビジキュラー写真技術に着目し、透光性シートの表面
に、光源からの照度の強さに応じた密度で不均一に分散
した微細な気泡を有する被覆層を設けたものにより、そ
の目的を達成しうること、そして、このものは、透過性
シートの表面に光照射により分解してガスを発生する光
分解性化合物を含有する樹脂層を設け、次いで、この樹
脂層に実際にシートを使用するのと同じ状態で光源から
光を照射したのち、加熱して発泡させ、さらに形成され
た微細気泡を固定化することにより、製造しうることを
見い出し、この知見に基づいて本発明を完成するに至っ
た。Means for Solving the Problems As a result of intensive studies to develop a brightness uniformizing sheet having the above-mentioned preferable properties, the present inventors have paid attention to the visual photography technology used in microfilms and the like, It is possible to achieve the object by providing the surface of the translucent sheet with a coating layer having fine bubbles non-uniformly dispersed at a density according to the intensity of illuminance from the light source, and Provides a resin layer containing a photodecomposable compound that decomposes to generate a gas on the surface of a permeable sheet when exposed to light. Then, the resin layer is exposed to light from a light source in the same state as when the sheet is actually used. After irradiating with, the mixture was heated to be foamed, and further the formed fine bubbles were fixed, and it was found that it can be produced, and the present invention was completed based on this finding.
【０００５】すなわち、本発明は、透光性シートの表面
に、光源からの照度の強さに応じた密度で不均一に分散
した微細な気泡を有する被覆層を設けて成る輝度均一化
シートを提供するものである。本発明に従えば、この輝
度均一化シートは、透光性シートの表面に、光照射によ
り分解してガスを発生する光分解性化合物を含有する樹
脂層を設け、次いでこの樹脂層に光を照射後、加熱して
発泡させ、微細気泡を形成させたのち、該気泡を固定化
することにより、製造することができる。That is, the present invention provides a brightness uniformizing sheet comprising a translucent sheet having a coating layer on the surface thereof, the coating layer having fine bubbles non-uniformly dispersed at a density according to the intensity of illuminance from a light source. It is provided. According to the invention, the brightness-uniforming sheet is provided with a resin layer containing a photodecomposable compound which decomposes upon irradiation with light to generate a gas on the surface of the translucent sheet, and the resin layer is then exposed to light. After irradiation, it can be produced by heating and foaming to form fine bubbles, and then fixing the bubbles.
【０００６】以下、本発明を詳細に説明する。本発明に
おいて用いられる透光性シートについては特に制限はな
いが、例えばポリエチレンテレフタレート、ポリカーボ
ネート、三酢酸セルロースなどのプラスチックフイル
ム、透明ガラス板、あるいは乳白色の各種半透明板やシ
ートなどが用いられる。これらの透光性シートに設けら
れる樹脂層に用いる基材樹脂としては、例えば塩化ビニ
リデン樹脂、塩化ビニリデンと塩化ビニル又はアクリロ
ニトリルとの共重合樹脂、エポキシ樹脂、ポリビニルア
ルコール、ゼラチン、ポリメチルメタクリレート、環化
ポリイソプレン、各種のウレタン樹脂などが挙げられ、
これらは１種用いてもよいし、２種以上を組み合わせて
用いてもよい。The present invention will be described in detail below. The translucent sheet used in the present invention is not particularly limited, but, for example, a plastic film such as polyethylene terephthalate, polycarbonate, or cellulose triacetate, a transparent glass plate, or various translucent plates or sheets of milky white are used. Examples of the base resin used for the resin layer provided in these translucent sheets include vinylidene chloride resin, copolymerization resin of vinylidene chloride and vinyl chloride or acrylonitrile, epoxy resin, polyvinyl alcohol, gelatin, polymethyl methacrylate, ring. Polyisoprene, various urethane resins, etc.
These may be used alone or in combination of two or more.
【０００７】また、これらの樹脂に混合される光照射に
より分解してガスを発生する光分解性化合物としては、
例えば４−Ｎ−モルホリノ−２,５−ジエトキシベンゼ
ンジアゾニウムボロフルオリド、４−Ｎ−モルホリノ−
２,５−ジプロキシベンゼンジアゾニウムジンククロリ
ド、ビスアジド（４'−アジドベンザル）−４−メチル
シクロヘキサノンなど光照射により分解して窒素ガスを
遊離する化合物、ＦｅＸ3、Ｋ3（ＣｏＸ3）、Ｌｉ3（Ｍ
ｎＸ3）（ただし、Ｘは−Ｃ2Ｏ4である）などの光照射
により二酸化炭素ガスを遊離する鉄、コバルト、マンガ
ンなどのトリオキザレート錯化合物など、従来ビジキュ
ラー写真フイルムにおいて慣用されている化合物が挙げ
られ、これらは１種用いてもよいし、２種以上を組み合
わせて用いてもよい。Further, as the photodecomposable compound which is mixed with these resins and decomposes by irradiation with light to generate gas,
For example, 4-N-morpholino-2,5-diethoxybenzenediazonium borofluoride, 4-N-morpholino-
2,5-proxy diazonium zinc chloride, bis-azido (4'-azidobenzal) -4 compounds decompose to liberate nitrogen gas by light irradiation such as methyl cyclohexanone, FeX 3, K 3 (CoX 3), Li 3 ( M
nX 3) (however, X is iron that liberates carbon dioxide gas by light irradiation, such as -C 2 O is 4), cobalt, etc. Trio Kizza rate complex compounds such as manganese, are conventional in the prior Bijikyura photographic film Compounds may be used, and these may be used alone or in combination of two or more.
【０００８】これらの光分解性化合物の配合量について
は特に制限はなく基材樹脂や光分解性化合物の種類に応
じて適宜選ばれるが、通常該樹脂１００重量部に対し
て、１〜２５重量部の割合で用いられる。該透光性シー
トに、光分解性化合物を含有する樹脂層を設けるには、
まず、適当な溶剤に、所望の基材樹脂と光分解性化合物
を、それぞれ所定の割合で溶解させて、液状の樹脂組成
物を調製し、次いで、この組成物を従来慣用されている
方法を用いて、透光性シートの表面に乾燥厚さが５〜５
０μｍ程度になるように塗布したのち、乾燥させればよ
い。このようにして、透光性シートの表面に設けられた
樹脂層に、実際に本発明シートを使用するのと同じ状態
で光源から光を照射して、該樹脂層中の光分解性化合物
を分解させたのち、加熱して発泡させ、次いで冷却して
気泡を固定化し、再び全面に均一に露光させて余剰の光
分解性化合物を分解させ、発泡させることなく分解ガス
を拡散除去する。The amount of these photodecomposable compounds to be added is not particularly limited and may be appropriately selected depending on the type of the base resin and the photodegradable compound, but usually 1 to 25 parts by weight relative to 100 parts by weight of the resin. Used in part ratio. To provide a resin layer containing a photodegradable compound on the translucent sheet,
First, a desired base resin and a photodecomposable compound are each dissolved in a predetermined solvent at a predetermined ratio to prepare a liquid resin composition, and then this composition is prepared by a conventional method. By using, the dry thickness on the surface of the translucent sheet is 5 to 5
The coating may be applied so as to have a thickness of about 0 μm, and then dried. In this way, the resin layer provided on the surface of the translucent sheet is irradiated with light from a light source in the same state as when the sheet of the present invention is actually used to remove the photodegradable compound in the resin layer. After decomposing, it is heated to foam, and then cooled to fix the bubbles, and the entire surface is exposed uniformly again to decompose the excess photodegradable compound, and the decomposed gas is diffused and removed without foaming.
【０００９】この際用いられる光源としては、例えば水
銀灯、蛍光灯、キセノンランプ、タングステンランプ、
太陽光などを用いることができるが、使用する光分解性
化合物の種類や得られる輝度均一化シートが適用される
装置の光源の種類に応じて適宜選ばれる。また、該輝度
均一化シートの作製は、該シートが実際に適用される装
置に装着して行ってもよいし、実際に適用される装置と
光源状態が同じ模擬装置を用いて行ってもよい。さら
に、露光時間は光分解性化合物やその濃度及び光源の種
類や照度などに応じて適宜選ばれ、一方加熱温度や加熱
時間は露光時間、光分解性化合物の種類や濃度、基材樹
脂の種類などに応じて適宜選ばれる。As the light source used at this time, for example, a mercury lamp, a fluorescent lamp, a xenon lamp, a tungsten lamp,
Although sunlight or the like can be used, it is appropriately selected depending on the type of photodecomposable compound used and the type of light source of the device to which the obtained brightness uniformizing sheet is applied. Further, the production of the brightness uniformizing sheet may be carried out by mounting it on a device to which the sheet is actually applied, or by using a simulation device having the same light source state as the device to which the sheet is actually applied. . Furthermore, the exposure time is appropriately selected according to the photodecomposable compound and its concentration and the type and illuminance of the light source, while the heating temperature and heating time are the exposure time, the type and concentration of the photodegradable compound, and the type of base resin. It is appropriately selected according to the above.
【００１０】このようにして、透光性シートの表面に、
光源からの照度の強さに応じた密度で不均一に分散した
微細な気泡を有する被覆層が設けられた本発明の輝度均
一化シートが得られる。前記シートを、再び前記光源の
全面において使用すると、光源からの照度に比例した密
度の光反射性微細気泡が存在するためシート透過後の面
輝度は均一となる。このことは、例えば気泡写真フイル
ムにおいて、露光時の面照度とそれによって生じた気泡
発生フイルムの光投影濃度（Ｌｏｇ非発泡層透過光強度
／発泡層透過光強度）がほぼ比例関係にある［「日本写
真学会誌」第４１巻、第３号、第１７８〜１８３ページ
（１９７８年）］ことから理解される。また、本発明シ
ート表面からの反射光も有効利用するために、光源背面
に光反射板を設けることはもちろん可能である。これに
よって、本発明の特徴の１つである光源エネルギー効率
を上げる効果が期待できる。In this way, on the surface of the translucent sheet,
The brightness uniformizing sheet of the present invention is obtained in which a coating layer having fine bubbles non-uniformly dispersed at a density according to the intensity of illuminance from a light source is provided. When the sheet is used again on the entire surface of the light source, the surface luminance after passing through the sheet becomes uniform because the light-reflecting fine bubbles having the density proportional to the illuminance from the light source are present. This is because, for example, in a bubble photo film, the surface illuminance at the time of exposure and the light projection density (Log non-foaming layer transmitted light intensity / foamed layer transmitted light intensity) of the bubble generating film generated thereby are in a substantially proportional relationship [[ Journal of the Photographic Society of Japan, "Vol. 41, No. 3, pp. 178-183 (1978)]. Further, in order to effectively utilize the reflected light from the surface of the sheet of the present invention, it is of course possible to provide a light reflecting plate on the back surface of the light source. As a result, the effect of increasing the energy efficiency of the light source, which is one of the features of the present invention, can be expected.
【００１１】[0011]
【実施例】次に、実施例により本発明をさらに詳細に説
明するが、本発明はこれらの例によってなんら限定され
るものではない。The present invention will be described in more detail by way of examples, which should not be construed as limiting the invention thereto.
【００１２】実施例１
図１に示すバックライト型液晶照明装置を用いて、輝度
均一化シートを作製した。ビニリデンクロリド−アクリ
ロニトリル共重合体８０ｇ、ポリメチルメタクリレート
１０ｇ、フタル酸２ｇ、４−Ｎ−モルホリノ−２,５−
ジエトキシベンゼンジアゾニウムポロフルオリド１０ｇ
及びブタン−２−オン１００mlを混合して、均質な樹脂
溶液を調製したのち、この樹脂溶液を、厚さ１００μｍ
の透明なポリエチレンテレフタレートフイルムの表面に
塗布して１２０℃で乾燥し、厚さ１０μｍの塗膜を形成
した。なお、以上の操作は暗室で行った。Example 1 A brightness uniformizing sheet was produced using the backlight type liquid crystal lighting device shown in FIG. Vinylidene chloride-acrylonitrile copolymer 80 g, polymethylmethacrylate 10 g, phthalic acid 2 g, 4-N-morpholino-2,5-
Diethoxybenzene diazonium polyfluoride 10g
And 100 ml of butan-2-one were mixed to prepare a homogenous resin solution, and the resin solution was made to have a thickness of 100 μm.
Was coated on the surface of the transparent polyethylene terephthalate film of Example 1 and dried at 120 ° C. to form a coating film having a thickness of 10 μm. The above operation was performed in a dark room.
【００１３】次に、図１に示すように、前記未露光フイ
ルムを、その塗膜２ａが背後に光反射板３を設けた蛍光
灯４に面するように、バックライト型液晶照明装置に取
り付け、蛍光灯４として東芝６０５ＦＬ６ＢＬＢ（６Ｗ
のブラックライトタイプ）を用いてフイルムまでの最短
距離２cmに設定して、４秒間露光したのち、ただちに１
２０℃で３秒間加熱して気泡を発生させ、次いで常温ま
で冷却して気泡を固定化し、あらためて、蛍光灯４で５
分間全面露光して残存するジアゾ化合物を分解し、遊離
する窒素ガスを気泡を生じさせることなく放散させ、図
２に示す輝度均一化シートを作製した。図２は輝度均一
化シートの断面図であって、透光性フイルム（ポリエチ
レンテレフタレートフイルム）１の表面に、光源からの
照度の強さに応じた密度で不均一に分散した微細な気泡
を有する被覆層２ｂが設けられた構造を示している。Next, as shown in FIG. 1, the unexposed film is attached to a backlight type liquid crystal lighting device so that the coating film 2a faces a fluorescent lamp 4 provided with a light reflection plate 3 behind it. , Toshiba 605FL6BLB (6W as fluorescent lamp 4
Black light type) and set the shortest distance to the film to 2 cm, and after 4 seconds of exposure, immediately 1
Heat at 20 ° C for 3 seconds to generate air bubbles, then cool to room temperature to fix the air bubbles and re-use the fluorescent lamp 4 for 5 seconds.
The remaining diazo compound was decomposed by exposing the entire surface for a minute, and the liberated nitrogen gas was diffused without generating bubbles to prepare a brightness uniformizing sheet shown in FIG. FIG. 2 is a cross-sectional view of the brightness-uniformizing sheet, which has fine bubbles unevenly dispersed on the surface of the translucent film (polyethylene terephthalate film) 1 at a density according to the intensity of illuminance from the light source. The structure in which the coating layer 2b is provided is shown.
【００１４】このようにして得られた輝度均一化シート
は、その被覆層２ｂが蛍光灯の照度の高い位置では気泡
密度が大きい上、気泡径が極めて微細なため光反射率が
高く、光源からの光は該フイルムを透過後輝度が均一化
していることが確認された。なお、輝度の均一化の程度
は次のようにして求めた。すなわち、図１における光拡
散板（ポリカーボネート製、厚さ２mm）５の表面の輝度
を輝度計を用いて測定する。図３は液晶照明装置の光拡
散板５における各位置と輝度との関係を示すグラフであ
り、該光拡散板５の左端及び右端は図３における横軸の
０及び１８０mmの位置である。また、図３において○−
○は光拡散板のみの場合を、△−△は輝度均一化シート
を使用した場合を示す。光源の蛍光灯４（４５mm及び１
３５mmの位置）の上の光拡散板５表面の輝度が中間点
（９０mmの位置）の表面輝度に対して±１０％の差以内
であれば輝度は均一化されていると判断される。In the brightness uniformizing sheet thus obtained, the covering layer 2b has a large bubble density at a position where the illuminance of the fluorescent lamp is high, and the bubble diameter is extremely fine, so that the light reflectance is high, and the covering layer 2b is After passing through the film, it was confirmed that the light had a uniform brightness. The degree of uniform brightness was obtained as follows. That is, the luminance of the surface of the light diffusion plate (made of polycarbonate, thickness 2 mm) 5 in FIG. 1 is measured using a luminance meter. FIG. 3 is a graph showing the relationship between each position on the light diffusing plate 5 of the liquid crystal lighting device and the luminance. The left end and the right end of the light diffusing plate 5 are positions 0 and 180 mm on the horizontal axis in FIG. Moreover, in FIG.
◯ indicates the case where only the light diffusion plate is used, and Δ-Δ indicates the case where the brightness uniformizing sheet is used. Fluorescent light source 4 (45 mm and 1
If the brightness of the surface of the light diffusing plate 5 above the position (35 mm position) is within ± 10% of the surface brightness at the intermediate point (position 90 mm), it is determined that the brightness is uniformized.
【００１５】実施例２
図４に示すエッジライト型液晶露光装置を用いて輝度均
一化シートを作製した。蒸留水３００ｇに、写真用ゼラ
チン５０ｇ及びトリオキザレートコバルトカリウム５ｇ
を加え溶解後、さらにホルマリン１ｇを添加し、ゼラチ
ン溶液を調製したのち、厚さ１００μｍの三酢酸セルロ
ースフイルム上に、乾燥厚さが５０μｍになるように塗
布し、７０℃で１時間乾燥して塗膜を形成した。なお、
以上の操作は暗室で行った。Example 2 A brightness uniformizing sheet was prepared using the edge light type liquid crystal exposure apparatus shown in FIG. 50 g of photographic gelatin and 5 g of potassium trioxalate cobalt in 300 g of distilled water
After dissolving, 1 g of formalin was further added to prepare a gelatin solution, which was then coated on a cellulose triacetate film having a thickness of 100 μm so that the dry thickness would be 50 μm, and dried at 70 ° C. for 1 hour. A coating film was formed. In addition,
The above operation was performed in a dark room.
【００１６】次に、図４に示すように、前記未露光フイ
ルムを、その塗膜２ａが蛍光灯（昼光色、６Ｗ）４に面
するように、透光性物質７及び反射膜８を有するエッジ
ライト型液晶露光装置に取り付け、蛍光灯４で２分間露
光した。露光後１００℃で２０秒間加熱して気泡を発生
させたのち、冷却して気泡を固定化し、次いで太陽光に
５分間露光して残存する光分解性化合物を分解させ、発
生する二酸化炭素ガスを気泡を発生させることなく拡散
させ、輝度均一化シートを作製した。このようにして得
られた輝度均一化シートは優れた輝度均一化効果を有す
ることが確認された。Next, as shown in FIG. 4, the unexposed film is provided with an edge having a translucent substance 7 and a reflective film 8 so that the coating film 2a faces the fluorescent lamp (daylight color, 6W) 4. It was attached to a light type liquid crystal exposure device and exposed for 2 minutes with a fluorescent lamp 4. After exposure, heat at 100 ° C. for 20 seconds to generate bubbles, then cool to fix the bubbles, then expose to sunlight for 5 minutes to decompose the remaining photodegradable compound, and generate carbon dioxide gas. A uniform brightness sheet was prepared by diffusing without generating bubbles. It was confirmed that the brightness uniformizing sheet thus obtained has an excellent brightness uniforming effect.
【００１７】[0017]
【発明の効果】本発明によると、輝度均一化効果に優
れ、光源からの光を吸収することがほとんどなくて明る
く、かつ温度上昇がないので樹脂が劣化しにくい上、小
型の装置にも適用できる輝度均一化シートを簡単にして
経済的に製造することができる。本発明の輝度均一化シ
ートは、特にバックライト型液晶表示装置や複写機など
に好適に用いられる。EFFECTS OF THE INVENTION According to the present invention, the effect of uniforming the brightness is excellent, the light from the light source is hardly absorbed, the brightness is high, and the temperature does not rise, so that the resin is not easily deteriorated and the invention is applied to a small device. It is possible to easily and economically manufacture the brightness uniformizing sheet that can be obtained. The brightness uniformizing sheet of the present invention is particularly suitable for a backlight type liquid crystal display device, a copying machine and the like.
【００１８】[0018]
【図１】バックライト型液晶照明装置を用いて本発明の
輝度均一化シートを作製する方法を示す説明図である。FIG. 1 is an explanatory view showing a method for producing a brightness uniformizing sheet of the present invention using a backlight type liquid crystal lighting device.
【００１９】[0019]
【図２】本発明の輝度均一化シートの１例の断面図であ
る。FIG. 2 is a cross-sectional view of an example of a brightness uniformizing sheet of the present invention.
【００２０】[0020]
【図３】輝度均一化程度を求める方法を説明するための
グラフである。FIG. 3 is a graph for explaining a method of obtaining a degree of uniform brightness.
【００２１】[0021]
【図４】エッジライト型液晶露光装置を用いて本発明の
輝度均一化シートを作製する方法を示す説明図である。FIG. 4 is an explanatory view showing a method for producing a brightness uniformizing sheet of the present invention using an edge light type liquid crystal exposure device.
【００２２】[0022]
１ 透光性フイルム ２ａ 塗膜 ２ｂ 気泡を有する被覆層 ３ 光反射板 ４ 蛍光灯 ５ 光拡散板 ６ ハウジング ７ 透光性物質 ８ 反射膜 1 Translucent film 2a coating film 2b Coating layer having air bubbles 3 Light reflector 4 fluorescent lights 5 Light diffuser 6 housing 7 Translucent material 8 Reflective film
Claims (3)
強さに応じた密度で不均一に分散した微細な気泡を有す
る被覆層を設けて成る輝度均一化シート。1. A brightness-uniformizing sheet comprising a light-transmissive sheet and a coating layer on the surface of the transparent sheet, the coating layer having fine bubbles non-uniformly dispersed at a density corresponding to the intensity of illuminance from a light source.
させたガスによるものである請求項１記載の輝度均一化
シート。2. The brightness uniformizing sheet according to claim 1, wherein the bubbles are formed by a gas generated by irradiating the photodegradable compound with light.
してガスを発生する光分解性化合物を含有する樹脂層を
設け、次いでこの樹脂層に光を照射後、加熱して発泡さ
せ、微細気泡を形成させたのち、該気泡を固定化するこ
とを特徴とする請求項１又は２記載の輝度均一化シート
の製造方法。3. A resin layer containing a photodecomposable compound that decomposes to generate a gas when irradiated with light is provided on the surface of a light-transmitting sheet, and the resin layer is then irradiated with light and heated to foam. The method for producing a brightness uniformizing sheet according to claim 1 or 2, wherein after forming fine bubbles, the bubbles are fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3177168A JPH05477A (en) | 1991-06-21 | 1991-06-21 | Brightness equalizing sheet and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3177168A JPH05477A (en) | 1991-06-21 | 1991-06-21 | Brightness equalizing sheet and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05477A true JPH05477A (en) | 1993-01-08 |
Family
ID=16026380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3177168A Pending JPH05477A (en) | 1991-06-21 | 1991-06-21 | Brightness equalizing sheet and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05477A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6633350B2 (en) | 1994-10-21 | 2003-10-14 | Canon Kabushiki Kaisha | Illumination device and display apparatus including same |
| 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 |
| WO2008054085A1 (en) * | 2006-10-30 | 2008-05-08 | Gl Korea Co., Ltd. | Cover plate for lighting fixture and lighting fixture having the same |
| US7674506B2 (en) | 2003-06-17 | 2010-03-09 | Teijin Chemicals, Ltd. | Direct back light type liquid crystal display and light diffuse plate |
-
1991
- 1991-06-21 JP JP3177168A patent/JPH05477A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6633350B2 (en) | 1994-10-21 | 2003-10-14 | Canon Kabushiki Kaisha | Illumination device and display apparatus including same |
| US7674506B2 (en) | 2003-06-17 | 2010-03-09 | Teijin Chemicals, Ltd. | Direct back light type liquid crystal display and light diffuse plate |
| 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 |
| WO2008054085A1 (en) * | 2006-10-30 | 2008-05-08 | Gl Korea Co., Ltd. | Cover plate for lighting fixture and lighting fixture having the same |
| US8287158B2 (en) | 2006-10-30 | 2012-10-16 | Gl Korea Co., Ltd. | Cover plate for lighting fixture and lighting fixture having the same |
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