JPS62204293A - Transmission plate for display device - Google Patents
Transmission plate for display deviceInfo
- Publication number
- JPS62204293A JPS62204293A JP61047769A JP4776986A JPS62204293A JP S62204293 A JPS62204293 A JP S62204293A JP 61047769 A JP61047769 A JP 61047769A JP 4776986 A JP4776986 A JP 4776986A JP S62204293 A JPS62204293 A JP S62204293A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- translucent
- display device
- ceramic
- transparent
- 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
- 230000005540 biological transmission Effects 0.000 title description 3
- 239000000919 ceramic Substances 0.000 claims description 22
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 10
- 229910052596 spinel Inorganic materials 0.000 claims description 7
- 239000011029 spinel Substances 0.000 claims description 7
- 238000005498 polishing Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 2
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 claims 1
- 239000011521 glass Substances 0.000 description 11
- 238000002834 transmittance Methods 0.000 description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910021538 borax Inorganic materials 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 235000010339 sodium tetraborate Nutrition 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 239000005338 frosted glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、ディスプレイ・デバイスに用いられる透過板
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transparent plate used in a display device.
［従来の技術］
従来、腕時計や計算機等のディスプレイ・デバイスとし
ては、液晶を用いた表示装置が多く使われているが、そ
の表示を透過させる透過板としてガラス板が用いられて
いる。[Prior Art] Conventionally, display devices using liquid crystals are often used as display devices for wristwatches, calculators, etc., and a glass plate is used as a transmitting plate that transmits the display.
［発明が解決しようとする問題点］
しかし、上記ガラス板からなる従来の透過板は、１９強
度が低く、割れやすい、２．硬度が低く、傷つきやすい
、という欠点があり、表面を更にプラスチック板によっ
て補強しなければならない場合が多いが、このプラスチ
ック板にしても軟らかく傷つきやすい欠点を持っている
。[Problems to be Solved by the Invention] However, the conventional transparent plate made of the above-mentioned glass plate has 19 low strength and is easy to break.2. It has the disadvantage that it has low hardness and is easily scratched, so the surface often needs to be further reinforced with a plastic plate, but even this plastic plate has the disadvantage of being soft and easily scratched.
又、３．商品イメージからも高級感を持ち得ない問題が
ある。Also, 3. There is also the problem that the product image does not give a sense of luxury.
更に、新しいディスプレイ法として、エレクトロクロミ
ックディスプレイやプラズマディスプレイ等の研究開発
が進められているが、いずれも透過板としてガラス板を
用いるように設計されており、液晶表示の場合と同様の
問題を有している。Furthermore, research and development is progressing on new display methods such as electrochromic displays and plasma displays, but all of these are designed to use glass plates as transparent plates, and they suffer from the same problems as liquid crystal displays. are doing.
そこで、本発明は、強度及び硬度に優れ、かつ高級感を
備えたディスプレイ・デバイス用透過板を提供しようと
するものである。Therefore, the present invention aims to provide a transparent plate for display devices that has excellent strength and hardness and has a high-class feel.
［問題点を解決するための手段］
本発明のディスプレイ・デバイス用透過板は、前記問題
点を解決するため、多結晶の透光性セラミックスによっ
て形成されたものである。[Means for Solving the Problems] In order to solve the above-mentioned problems, the transmitting plate for a display device of the present invention is formed of polycrystalline translucent ceramics.
［作 用コ
多結晶の透光性セラミックスによって形成された透過板
を、液晶等の表示物に接触させて使用することにより、
表示が明瞭に読み取られ、透過板の少なくとも外表面を
研磨することにより、表示が一層明瞭に読み取られる。[Function] By using a transparent plate made of polycrystalline translucent ceramic in contact with a display object such as a liquid crystal,
The display can be clearly read, and by polishing at least the outer surface of the transmission plate, the display can be read more clearly.
［実施例］
実施例１
純度９９．９％、平均粒径０．５μｍのアルミナ粉末に
硝酸マグネシウムを０．２重量％添加したものを、１０
００Ｋｇ／ｃｒｒ？の圧力で加圧成形し、３ｃｍ角でｌ
ｌ１ｌＩ１１の厚さの板とした。これを水素雰囲気中に
おいて１８００℃の温度で５時間焼成して多結晶の透光
性アルミナセラミックス板を得た。板厚は、 ０．７
ｍｍとなった。又、透光性アルミナセラミ箋りス板の光
の透過率は、全透過率（屈折したり曲がったりしながら
も、ともかく透過する割合：拡散透過率）で９６％、直
線透過率で４０％であった。[Example] Example 1 Alumina powder with a purity of 99.9% and an average particle size of 0.5 μm and 0.2% by weight of magnesium nitrate was added to 10
00Kg/crr? Pressure molded at a pressure of 3cm square.
The plate had a thickness of l1lI11. This was fired in a hydrogen atmosphere at a temperature of 1800° C. for 5 hours to obtain a polycrystalline translucent alumina ceramic plate. The plate thickness is 0.7
It became mm. In addition, the light transmittance of the translucent alumina ceramic glass board is 96% in total transmittance (diffuse transmittance, which is the percentage of light that is transmitted even though it is bent or bent) and 40% in straight line transmittance. Met.
上記透光性アルミナセラミックス板を、酸化タングステ
ンをＥＣ材料として用いたディスプレイ・デバイス（小
形のＥＣＤ、図参照）の透過板（表面板）１として用い
た。ＥＣパターンとして０．１ ｍｍの線で２ｍｍ大の
アルファベットを描いたが、判読可能であった。The above-mentioned translucent alumina ceramic plate was used as a transmitting plate (surface plate) 1 of a display device (small ECD, see figure) using tungsten oxide as an EC material. As an EC pattern, a 2 mm sized alphabet was drawn using 0.1 mm lines, but it was legible.
なお、図において２ａ、２ｂは透明電極、３はトランス
ファ、４は電解液、５は反射板／対向電極、６は電解液
４等をバックアップするガラス、７はシール材である。In the figure, 2a and 2b are transparent electrodes, 3 is a transfer, 4 is an electrolytic solution, 5 is a reflection plate/counter electrode, 6 is a glass for backing up the electrolytic solution 4, etc., and 7 is a sealing material.
又、上記ディスプレイ・デバイスの透過板１に１ｍの高
さから砂をｌ０００Ｋｇ振り掛けて、透過板１の傷を観
察した。比較としてガラス板を用いた従来品を使用した
ところ、従来品のガラス板からなる透過板は、いわゆる
スリガラスとなり表示内容が判読不能となったのに対し
、透光性アルミナセラミックスからなる透過板１は、傷
がなく、試験前と変わらなかった。In addition, 1000 kg of sand was sprinkled on the transparent plate 1 of the display device from a height of 1 m, and scratches on the transparent plate 1 were observed. When a conventional product using a glass plate was used for comparison, the transparent plate made of a glass plate of the conventional product became so-called frosted glass and the display contents became illegible, whereas the transparent plate 1 made of translucent alumina ceramics There were no scratches and the condition was the same as before the test.
実施例２
純度９９．９５％、平均粒径０，３μｍのストイキオメ
トリツクスピネル粉末にＰＶＡを０．５重量％添加した
ものを、 １５００にｇ／ｃｒｒ？の圧力で加圧成形し
、３ｃｍ角で２．６１の厚さの板とした。これを空気中
において９００℃の温度で２時間焼成した後、更に水素
雰囲気中において１６５０℃の温度で４時間焼成して多
結晶の透光性スピネルセラミックス板を得た。この透光
性スピネルセラミックス板を、平面研削盤を用いて１．
［ｌ ａｍの厚さに研削した後、ラップ盤を用いて片面
のみ０．１μｍＲｍａｘの面粗度に研磨した。Example 2 A stoichiometric spinel powder with a purity of 99.95% and an average particle size of 0.3 μm to which 0.5% by weight of PVA was added was added to 1500 g/crr? It was press-formed at a pressure of 3 cm square and 2.61 mm thick. This was fired in air at a temperature of 900°C for 2 hours, and then further fired in a hydrogen atmosphere at a temperature of 1650°C for 4 hours to obtain a polycrystalline translucent spinel ceramic plate. This translucent spinel ceramic plate was polished using a surface grinder in 1.
After grinding to a thickness of [l am], only one side was polished to a surface roughness of 0.1 μm Rmax using a lapping machine.
上記透光性スピネルセラミックス板を、ＴＮ方式の液晶
のガラス板からなる透過板の代わりに研磨面を外側にし
て腕時計に組み込み、表示状態を観察したところ、ガラ
ス板によるものと変わりがなかった。The above-mentioned translucent spinel ceramic plate was incorporated into a wristwatch with the polished surface facing outward in place of a transparent plate made of a TN type liquid crystal glass plate, and the display condition was observed and found to be no different from that of a glass plate.
この腕時計を実際に人の腕にはめて、透過板の傷付きテ
ストを行った。１年後、ガラス板からなる透過板には多
数の傷が見られたが、透光性スピネルセラミックス板か
らなる透過板には全く傷が見られなかった。This watch was actually worn on a person's wrist, and a scratch test was conducted on the transparent plate. After one year, many scratches were observed on the transparent plate made of glass plate, but no scratches were observed on the transparent plate made of translucent spinel ceramic plate.
実施例３
実施例１と同じようにして作った多結晶の透光性アルミ
ナセラミックス板にホウ酸ナトリウムの粉末を付着させ
、これを空気中において１２００℃の温度で１０分間加
熱して、アルミナを溶融したホウ酸ナトリウム中に溶出
させ、化学研磨を行い、研磨後これを希塩酸で洗浄して
ホウ砂を除去した。表面の面粗度を測定したところ０．
１μＩＩＩＲｍａｘであった。又、全透過率は９７％で
、直線透過率は８０％であった。更に見掛けはガラス状
であり、実施例１と同じディスプレイ・デバイスにおい
て０．０５ｍｍの線まで判読可能であった。又、傷付き
試験結果は、実施例１と同様で試験前と変わらなかった
。Example 3 Sodium borate powder was attached to a polycrystalline translucent alumina ceramic plate made in the same manner as in Example 1, and this was heated in air at a temperature of 1200°C for 10 minutes to form alumina. It was eluted into molten sodium borate and subjected to chemical polishing, and after polishing, it was washed with dilute hydrochloric acid to remove the borax. When the surface roughness was measured, it was 0.
It was 1μIIIRmax. Further, the total transmittance was 97% and the straight transmittance was 80%. Furthermore, it had a glass-like appearance and was legible down to a 0.05 mm line using the same display device as in Example 1. Furthermore, the scratch test results were similar to those in Example 1 and were unchanged from before the test.
なお、多結晶の透光性セラミックス板は、表面粗さが滑
らかなほど裏面の表示物が明瞭に見える。特に非発光型
のディスプレイ・デバイスの場合、外光が２度透過する
ことになり、外表面の粗さが大ぎく影響を及ぼす。内表
面には、表示物が直接接触しているので、内表面の粗さ
はさほど問題ではない。したがって、透光性セラミック
ス板からなる透過板の少なくとも外表面を研磨して滑ら
かにすることがのぞましい。Note that the smoother the surface roughness of a polycrystalline translucent ceramic plate, the more clearly the display object on the back side can be seen. Particularly in the case of non-emissive display devices, external light passes through them twice, and the roughness of the outer surface has a great effect. Since the display object is in direct contact with the inner surface, the roughness of the inner surface is not a big problem. Therefore, it is desirable to polish at least the outer surface of the transparent plate made of a transparent ceramic plate to make it smooth.
又、透過板としては、例えばサファイア板のような単結
晶の透光性セラミックス板を用い得るが、コストが高く
なる。しかし、一層の高級６・・・ガラス
品には適用可能であろう。Further, as the transmitting plate, a single-crystal translucent ceramic plate such as a sapphire plate can be used, but this increases the cost. However, it may be applicable to higher grade 6... glass products.
更に、透過板を多結晶の透光性アルミナセラミックス板
及び透光性スピネルセ′ラミックス板によって形成する
場合に限らず、多結晶の透光性イツトリアセラミックス
板によって形成してもよい。このような立方晶系のセラ
ミックスは、アルミナセラミックスのように、結晶に異
方性がないので、透過板としての用途に一層適合する。Further, the transmitting plate is not limited to being formed from a polycrystalline translucent alumina ceramics plate and a translucent spinel ceramics plate, but may also be formed from a polycrystalline translucent yttoria ceramics plate. Such cubic ceramics, unlike alumina ceramics, do not have anisotropy in their crystals, so they are more suitable for use as transmission plates.
［発明の効果］
以上のように本発明のディスプレイ・デバイス用透過板
によれば、強度及び硬度が大幅に向上するので、従来の
ように割れたり傷ついたりすることがなく、かつディス
プレイ・デバイスを高級感を備えたものとすることがで
きる。[Effects of the Invention] As described above, according to the transparent plate for display devices of the present invention, the strength and hardness are significantly improved, so that it does not break or get damaged as in the past, and it is easy to use for display devices. It can provide a sense of luxury.
図は本発明のディスプレイ・デバイス用透過板を備えた
小形ＥＣＤの断面図である。The figure is a sectional view of a small ECD equipped with a transparent plate for a display device according to the present invention.
Claims (5)
ことを特徴とするディスプレイ・デバイス用透過板。(1) A transparent plate for a display device, characterized in that it is formed of polycrystalline translucent ceramic.
磨されている特許請求の範囲第１項記載のディスプレイ
・デバイス用透過板。(2) The transmitting plate for a display device according to claim 1, wherein the translucent ceramic is polished by chemical polishing.
ミックスである特許請求の範囲第１項又は第２項記載の
ディスプレイ・デバイス用透過板。(3) The transmitting plate for a display device according to claim 1 or 2, wherein the translucent ceramic is a translucent alumina ceramic.
ミックスである特許請求の範囲第１項又は第２項記載の
ディスプレイ・デバイス用透過板。(4) The transmitting plate for a display device according to claim 1 or 2, wherein the translucent ceramic is a translucent spinel ceramic.
ラミックスである特許請求の範囲第１項又は第２項記載
のディスプレイ・デバイス用透過板。(5) The transmitting plate for a display device according to claim 1 or 2, wherein the translucent ceramic is a translucent yttria ceramic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61047769A JPS62204293A (en) | 1986-03-05 | 1986-03-05 | Transmission plate for display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61047769A JPS62204293A (en) | 1986-03-05 | 1986-03-05 | Transmission plate for display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62204293A true JPS62204293A (en) | 1987-09-08 |
Family
ID=12784583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61047769A Pending JPS62204293A (en) | 1986-03-05 | 1986-03-05 | Transmission plate for display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62204293A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3362420A4 (en) * | 2015-10-16 | 2019-06-19 | Saint-Gobain Ceramics&Plastics, Inc. | Transparent ceramic with complex geometry |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5347415A (en) * | 1976-10-14 | 1978-04-27 | Toshiba Ceramics Co | Surface treatment of light permeable alumina ceramics |
| JPS58190882A (en) * | 1974-03-22 | 1983-11-07 | ゼネラル・エレクトリツク・コンパニ− | Chemically polishable polycrystal alumina material |
| JPS60191062A (en) * | 1984-03-13 | 1985-09-28 | 株式会社トクヤマ | Manufacture of transparent aluminum oxide nitride sintered body |
-
1986
- 1986-03-05 JP JP61047769A patent/JPS62204293A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58190882A (en) * | 1974-03-22 | 1983-11-07 | ゼネラル・エレクトリツク・コンパニ− | Chemically polishable polycrystal alumina material |
| JPS5347415A (en) * | 1976-10-14 | 1978-04-27 | Toshiba Ceramics Co | Surface treatment of light permeable alumina ceramics |
| JPS60191062A (en) * | 1984-03-13 | 1985-09-28 | 株式会社トクヤマ | Manufacture of transparent aluminum oxide nitride sintered body |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3362420A4 (en) * | 2015-10-16 | 2019-06-19 | Saint-Gobain Ceramics&Plastics, Inc. | Transparent ceramic with complex geometry |
| US10875812B2 (en) | 2015-10-16 | 2020-12-29 | Saint-Gobain Ceramics & Plastics, Inc. | Transparent ceramic with complex geometry |
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