JPH0581911B2 - - Google Patents
Info
- Publication number
- JPH0581911B2 JPH0581911B2 JP27938787A JP27938787A JPH0581911B2 JP H0581911 B2 JPH0581911 B2 JP H0581911B2 JP 27938787 A JP27938787 A JP 27938787A JP 27938787 A JP27938787 A JP 27938787A JP H0581911 B2 JPH0581911 B2 JP H0581911B2
- Authority
- JP
- Japan
- Prior art keywords
- image holding
- holding member
- recording
- conductive
- diffuse reflection
- 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.)
- Expired - Lifetime
Links
- 239000000843 powder Substances 0.000 claims description 33
- 239000010419 fine particle Substances 0.000 claims description 20
- 229920005989 resin Polymers 0.000 claims description 20
- 239000011347 resin Substances 0.000 claims description 20
- 238000002955 isolation Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 11
- 238000004140 cleaning Methods 0.000 description 9
- 239000002245 particle Substances 0.000 description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 6
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229920000728 polyester Polymers 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000010407 anodic oxide Substances 0.000 description 2
- 229910000410 antimony oxide Inorganic materials 0.000 description 2
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 229910003437 indium oxide Inorganic materials 0.000 description 2
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920002050 silicone resin Polymers 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- 229910001887 tin oxide Inorganic materials 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 208000003464 asthenopia Diseases 0.000 description 1
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- -1 calcium Chemical class 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000012461 cellulose resin Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000007849 furan resin Substances 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- FDZZZRQASAIRJF-UHFFFAOYSA-M malachite green Chemical compound [Cl-].C1=CC(N(C)C)=CC=C1C(C=1C=CC=CC=1)=C1C=CC(=[N+](C)C)C=C1 FDZZZRQASAIRJF-UHFFFAOYSA-M 0.000 description 1
- 229940107698 malachite green Drugs 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- 230000004304 visual acuity Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Combination Of More Than One Step In Electrophotography (AREA)
Description
〔産業上の利用分野〕
本発明は電気的吸着力によつて導電性着色微粉
体を固定し、これにより記録もしくは表示するよ
うにした装置に関する。
〔従来の技術〕
従来から電気的表示装置としてCRT表示装置、
液晶表示装置、発光ダイオード表示装置、螢光表
示装置、プラズマ表示装置、エレクトロクロミツ
ク表示装置などがよく知られているが、大画面の
表示が高度な技術を要し困難であること、著しく
高価であること、精細度が低下すること、あるい
は表示がちらつき視力の疲労が激しいといつた
種々の欠点を抱えている。
そこで、これらの表示装置にかわる新規な表示
装置としていくつかのものが提案されている。
たとえば光導電層を使用し露光と同時に導電性
着色磁性微粉体を電気的に吸着させて表示する装
置（特願昭56−197410号特公平03−64864号公報）
とか、誘電体上にピン電極等で電気潜像を形成し
これに絶縁性着色微粉体を電気的に吸着させ表示
する装置（実開昭57−55061号）とか、あるいは
誘電体上にピン電極等で導電性着色磁性微粉体を
電気的に吸着させ表示する装置（特公昭54−
46707号）、磁化容易スタイラスにより導電性着色
磁性微粉体を磁気的な吸着力により表示する装
置、などがそれである。
上に挙げた装置は原則的に高精細な表示が可能
であること、大画面の表示が簡便かつ安価に可能
であること、さらには着色微粉体による表示の点
で表示画像にちらつきがなく視力の被労が比較的
少ないこと、などの利点から注目を集めるに至つ
ている。
しかしその反面、表示装置として要求される高
コントラスト、高寿命、低環境下での安定性、高
信頼性などの点で不十分なため、実用化されるに
は至つていない。
〔発明が解決しようとする問題点〕
本発明の目的は、特公昭51−46707号公報等で
知られるいわゆるマグネスタイラスと呼ばれる画
像形成法に基づく、すなわち誘電体上にピン電極
等で導電性着色磁性微粉体を電気的に吸着させて
表示する記録表示装置において、高コントラスト
ならびに優れた記録もしくは表示特性を示す記録
表示装置を提供することにある。
〔問題点を解決するための手段および作用〕
本発明は、像保持部体と分割された複数の電極
とを導電性着色微粉体を介して隔離対向するよう
に配設し、該像保持部体と該電極間に電圧を印加
して像保持部体に電気的に導電性着色磁性微粉体
を付着させる記録表示装置において、上記像保持
部体を少なくとも導電層と拡散反射層とで構成
し、該拡散反射層を結着性樹脂中に不溶性の微粒
子を分散させた構成とするとともに、該結着性樹
脂の総量(A)と該微粒子の総量(B)をＢ／Ａ1.8と
したことを特徴とする。
本発明に適用される記録もしくは表示手段は、
いわゆるマグネスタイラスと呼ばれるものであ
る。
すなわち、その原理は、第４図に示すように非
磁性円筒３内で円柱状の磁石２を回転させ、この
非磁性円筒３上を着色された導電性着色磁性微粉
体１を搬送して、非磁性円筒３上に軸方向に沿つ
て密に配列された針状記録電極４上を通過させ
る。しかして、表面側の記録層６と裏面側の導電
層７とからなる像保持部体５の導電層７と、記録
電極４間に画像情報にしたがつて電圧を印加し、
それが印加された部分のみ像保持部体５に導電性
着色磁性微粉体を付着させて画像を形成するもの
である。
像保持部体上の表示画像を除去するために、ク
リーニング部材を設けることも可能で、微粉体の
除去に用いられるブレードクリーニング、フアー
クリーニング、吸引クリーニング、磁気ブラシク
リーニングなどを設けることができる。クリーニ
ング方式としては、像保持部体表面に誘起された
電荷を除去するようにクリーニング部材を通して
記録媒体上に誘起された電荷を電気的に除去する
方法が、より効果的であり、たとえば像保持部体
表面に磁石を隣接して配し表示に用いた導電性着
色磁性微粉体を介在させ接地させる方法が有効で
ある。
かかる記録表示手段において、像保持部体はコ
ントラストを高めるために次のような方法が考え
られる。
光反射面を凹凸にし乱反射させる方法。
アルミニウムの陽極酸化膜を用いる方法（特
公昭51−46707号公報に開示）。
しかしの方法では、凹部に導電性着色磁性微
粉体が捕捉されコントラストの低下を招くので、
好ましくない。またの方法では陽極酸化時にク
ラツクが発生することから電圧リークが生じ易い
こと、表面が凹凸になりの方法と同じような弊
害が生じること、陽極酸化膜の白色度が低くコン
トラストが十分にとれないこと、環境が変動した
とき電圧リークが多発し記録もしくは表示の濃度
が低下しコントラストが十分にとれないこと、な
どの問題点が出てくる。
そこで本発明者らが鋭意研究した結果、像保持
部体を少なくとも導電層と拡散反射層との積層体
とし、かつ拡散反射層を結着性樹脂中に有機また
は無機質の微粒子が分散した構成とすることによ
つて、上述した問題点を解決することができた。
すなわち、拡散反射層は片方の成分として結着
性樹脂を用いているため、表面の均一性が向上
し、また内部のクラツク等を除去できるため凹凸
面による導電性着色磁性微粉体の捕捉の軽減が計
られ、電圧のリークが防止できる。また結着性樹
脂中に微粒子が分散しているから、かかる界面で
の屈折率差からの界面反射により著しく白色度が
向上し、コントラストが向上する。
しかし、拡散反射層の構成成分の割合には一定
の条件が存在することも明らかにされた。
すなわち、拡散反射層中の不溶性微粒子の割合
が多くなると、微粒子間が樹脂連続相で完全に充
填されず、微粒子間に空隙が生じることになる。
像保持部体を繰り返し使用するうちに、この空隙
が導電性着色磁性微粉体で充填され、その結果、
拡散反射層表面で光が吸収されて白色度が低下
し、記録もしくは表示におけるコントラストの低
下の原因となる。
このような不都合を解消するため、本発明者ら
が拡散反射層における結着性樹脂の重量(A)と不溶
性微粒子の重量(B)の比率Ｂ／Ａの関係を検討した
ところ、第５図にみられるような結果が得られ
た。
なお、不溶性微粒子の粒径により個々の空隙の
大きさは異なるが、総空隙量としては著しい差は
認められなかつた。
本来、拡散反射層の空隙防止を目的としたもの
であるから、空隙率で規定されるべきものである
が、前述の点から組成比で代用できることが分つ
た。
第５図に基づくと、Ｂ／Ａ比が1.8以上のとこ
ろで、繰り返し使用時における拡散反射層への導
電性着色磁性微粉体の付着によつて、著しく白色
度が低下することが明らかである。
拡散反射層はたとえば非相溶性ポリマーを混合
し成膜する方法とか、不溶性の微粒子を結着性樹
脂中に分散させる方法によつて形成できる。
不溶性微粒子は、無機質あるいは有機質の材料
から広く選択でき、たとえば酸化チタン、酸化マ
グネシウム、酸化バリウム、酸化カルシウム等の
金属酸化物、硫酸バリウム、硫酸マグネシウム等
の硫酸金属塩、炭酸バリウム、炭酸マグネシウ
ム、炭酸カルシウム等の炭酸金属塩、あるいは硬
化性樹脂の、微粒子などである。
また結着性樹脂としては、たとえばポリエステ
ル、アクリル樹脂、ポリオレフイン、ポリアセタ
ール、ポリアミド、ポリスチレン、含ハロゲン系
樹脂、ケイ素樹脂、ポリエーテル、ポリカーボネ
ート、酢酸ビニル樹脂、繊維素系樹脂、およびこ
れらの共重合体で代表される熱可塑性樹脂、ある
いはフエノール樹脂、キシレン樹脂、石油樹脂、
ユリア樹脂、メラミン樹脂、不飽和ポリエステ
ル、アルキツド樹脂、エポキシ樹脂、シリコーン
樹脂、フラン樹脂などの単体もしくは共重合体で
代表される熱硬化性樹脂があり、これらは混合し
て用いることもできる。
本発明で言う拡散反射層の「拡散反射」とは、
正反射光以外の反射光成分を形成する反射特性を
有するもので、正反射光成分の強度と非反射光成
分の強度の割合で規定され、非反射光成分の多い
場合ほど拡散反射性が優れたものとなる。
記録表示装置ではコントラストの視野角依存性
が少ないこと、つまり拡散反射層が優れたものが
要求されるので、非反射光成分を大きくする必要
がある。
拡散反射性の規定はいくつかの方法があるが、
本発明ではその簡便性および実用性の点からマス
ベス濃度計あるいは同機能品等で得られる反射濃
度から、以下に基づき白色度として規定した。
白色度＝〔（1.44−反射濃度）／（1.44
＋0.44）〕×100
白色度100：反射濃度0.04（パネルテストでほぼ
全員が純白と表現）
白色度０：反射濃度1.44（パネルテストでほぼ
全員が黒と表現。またコントラストが全くとれ
ない状態。）
このような白色度の定義に基づくと、記録もし
くは表示のコントラストは像保持部体としての白
色度と記録または表示部の白色度の差分と規定で
きる。したがつて像保持部体の白色度が低下する
ことは必然的にコントラストが低下することにな
り、記録もしくは表示として不十分となつてく
る。
かかる記録もしくは表示方法ではこれまで白色
度が不十分で必要なコントラストが得られなかつ
たが、本発明においては拡散反射層が結着性樹脂
とそれに分散した微粒子とから構成されるため60
％以上の白色度が得られ、十分なコントラストが
得られるようになつた。
一方、拡散反射層は十分な電気抵抗を有する層
で容易に導通状態にはならないこと、もしくは帯
電時に実質的な電位を生じ、十分なコントラスト
を生じるように機能する層である。したがつて像
保持部体として機能せられるべき状態は使用条件
に依存してくる要素も若干あるが、本発明のよう
に高コントラストを目的とすると、帯電後100ｍ
sec以上で初期帯電電圧の50％以上を維持する必
要があるので拡散反射層の固有電気抵抗は
1012Ω・cm以上となる。より高いコントラストを
目指した場合は拡散反射層の固有電気抵抗は
1013Ω・cm以上が望ましい。
本発明の記録表示装置においてその表示特性は
帯電層に生ずる電荷量に比例するので、表示を形
成する導電性着色磁性微粉体の着色度にも若干関
係するが、原則的には帯電層の膜厚をｔ、表示を
形成するときに印加する電圧をＶとすれば、十分
なコントラストを得るには
Ｖ15（Ｖ／μｍ）×ｔ（μｍ）となる。
さらに高いコントラストを得るためには
Ｖ20（Ｖ／μｍ）×ｔ（μｍ）
が望ましいことになる。
駆動回路とのマツチングを考慮すると、電圧
100V程度以下では比較的出力し易いので、帯電
時の膜厚としては7μｍ以下、望ましくは5μｍ以
下が実用的である。
また研究によれば導電層と拡散反射層の剥離を
防止するため中間に接着性を高める中間層を設け
ても、本発明の効果が損なわれることはないこと
が分つた。
本発明における導電層とは、十分小さい電気抵
抗を有する層で容易に導通状態にある、言い換え
れば帯電時に実質的な電位を生じないように機能
するような層である。
したがつて導電層として機能せられるべき状態
は使用条件に依存してくる要素も若干あるが、本
発明のように高コントラストを目指す場合は、導
電層に生じる浮遊電位はコントラスト低下の原因
となるので、つまり帯電後100ｍsec以下で初期帯
電電位の1/10以下に減衰すれば十分な導電状態と
言えるので、導電層の固有電気抵抗は1012Ω・cm
となる。より高速な画像表示を目的とする場合は
帯電後１ｍsec以下で初期帯電電位の1/10以下に
減衰することが要求されてくるので、導電層の固
有電気抵抗は1010Ω・cm以下が望ましい。
導電層を形成する材質は、アルミニウム、鉄、
金、錫、亜鉛等の導電性金属、カーボン、酸化
錫、酸化インジウム、酸化アンチモン等の導電性
無機系化合物、の単体もしくは複合体、あるいは
ポリマー等の連続相中に上記導電性物質を粉末に
して分散せしめたものであり、特に記録もしくは
表示としてのコントラストを高めるためには、導
電層としては光吸収性が少なく、光反射性に優れ
たものが望ましい。
次に、導電性着色微粉体は本発明を限定する条
件ではないが、これは主としてバインダー、導電
性粉体、磁性体、さらに必要に応じて着色剤とし
ての各種染料および顔料から構成されるものであ
る。
そのバインダーとしては、先述した結着性樹脂
が用いられ、一般に15〜60重量％使用される。
また導電性粉体としては、導電性カーボン、各
種導電性金属の微粉末、酸化亜鉛、酸化錫、酸化
インジウム、酸化アンチモン等の導電性酸化物の
微粉末が用いられ一般に２〜30重量％使用され
る。
また磁性体としては、酸化第２鉄等が20〜80重
量％使用される。
さらに必要に応じて用いられる着色剤は各種フ
タロシアン、マラカイトグリーンを始めとする染
料や顔料が15〜20重量％の範囲で用いられる。
上に挙げた各構成成分を100〜300℃程度に加熱
し、均一に混合してから冷却し微粉末に粉砕する
か、さらに必要に応じ２分級等により不必要な粒
径の粉末を取除ければ、目的とする導電性着色磁
性微粉体を得ることができる。
これは一般に５〜20μｍ程度の平均粒径をも
ち、固有電気抵抗は導電性着色微粉体収納容器内
において印加電圧100V以下で103Ω・cmから
109Ω・cmの範囲のものが使用される。
一方、本発明の記録表示装置の一般的なプロセ
ス条件を紹介すると、まず回転磁極としては６極
から50極構成程度で500〜2000ガウス程度のもの
を回転数300〜7000rpm程度で回転して用いる。
非磁性円筒としてはアルミニウムやステンレスな
どの非磁性金属、もしくはプラスチツクや各種無
機酸化物等の単体もしくは複合体の、成形品が用
いられ、これは回転しても回転しない状態で用い
てもよい。記録電極としては電極幅0.1〜１mm、
電極間隔0.1〜１mmで電圧10〜100Vの印加電圧が
用いられる。記録媒体の移動速度は50〜700ｍ／
sec、電極との距離は50〜500μｍ程度に設定され
る。
本発明における像保持部体のモデルの構成を図
で示すと、第３図のようになる。
すなわち同図イは導電層７である支持体７の片
面に拡散反射層６ａが積層された構造を示し、ま
た同図ロは、支持体３０の片面に導電層７ａを介
して拡散反射層６ａが積層された構造を示す。
実施例
以下、実施例と比較例を挙げて本発明をさらに
具体的に説明する。
実施例 １
第１図に示す記録表示装置を製作した。
５は無端ベルト状に形成された像保持部体で、
導電性支持体７および拡散反射層６から構成され
ている。なお、像保持部体５は無端でないベルト
状でもよい。像保持部体５は上下に対向配置され
た１対のローラ１１，１１′に掛回されており、
表示部１８において背板１６およびローラ１１，
１１′により平面かつ移動可能に支持されていて、
画像形成時には矢印方向に駆動される。像保持部
体５の循環路の最下方の位置、すなわちローラ１
１′と対向する位置には、像保持部体５に表示物
質としての導電性着色磁性微粉体１を表示情報に
したがつて付着させ、表示を形成する手段１７が
配設されている。なお、導電性着色磁性微粉体１
は容器９に収納されている。
前記の表示形成手段１７にもとづき原稿読取装
置１５から得られた情報は、記憶装置１４を介し
記録制御部１３により記録電極４に電気信号とし
て印加される。なお、８は透明板、１２はクリー
ニング部材、１８は表示部を示している。
テレフタル酸とエチレングリコールの縮重合体
であるポリエステル樹脂30重量部に対し平均粒径
0.5μｍの酸化チタンの微粒子30重量部を200℃で
熔融分散せしめ、この分散物をＴ型ダイからフイ
ルム状に押出して厚み50μｍのアルミニウムフオ
イルの片面に熱ラミネートし、膜厚5μの白色フ
イルムを設けて、像保持部体を製造した。
このようにして製造した像保持部体を第１図に
示す装置に装着して、表示機能を調べた。なお、
使用した導電性着色磁性微粉体はビスフエノール
Ａ型エポキシ樹脂30重量部、導電性カーボン10重
量部、第２酸化鉄60重量部から構成され、平均粒
径10μ、固有電気抵抗106Ω・cm（100V印加）で
ある。
また回転磁極は16極構成900ガウム、外径36φ
のものを像保持部体の移動方向と逆方向の回転で
回転数2200rpmである。非磁性円筒は肉厚１mm、
外径40φのもので、像保持部体と対向する位置に
電極幅0.5mm、電極間隔0.25mmの間隔でエツチン
グ処理により電極を設けた厚み200μｍのポリイ
ミドフイルムを、非磁性円筒外表面に接着した。
電極への印加電圧は40Vである。
このような条件下で像保持部体を220mm／secの
速度で移送して、表示機能を調べた。その結果を
表１に示す。
実施例 ２
ポリエステル30重量部、酸化チタン微粒子54重
量部として拡散反射層を形成したことを除いて実
施例１と同様にして像保持部体を製造し、以後同
様にして表示機能を調べた。表１にその結果を示
す。
比較例 １
ポリエステル30重量部、酸化チタン微粒子60重
量部を用いて拡散反射層を形成したことを除い
て、実施例１と同様にして像保持部体を製造し、
以後同様にして表示機能を調べた。結果を表１に
示す。
比較例 ２
ポリエステル30重量部、酸化チタン微粒子90重
量部を用いて拡散反射層を形成したことを除い
て、実施例１と同様にして像保持部体を製造し、
以後同様にして表示機能を調べた。結果を表１に
示す。
比較例 ３
ポリエステル30重量部、酸化チタン微粒子120
重量部を用いて拡散反射層を形成したことを除い
て、実施例１と同様にして像保持部体を製造し、
以後、同様にして表示機能を調べた。結果を表１
に示す。
比較例 ４
厚み50μｍのアルミニウムフオイルを修酸濃度
７重量％の水溶液（温度30℃）に浸漬し、電圧
50Vの直流電圧（電流密度1A／ｄm2）を20分間
印加し、陽極酸化処理により膜厚10μｍのアルマ
イト層を設けて、像保持部体とした。これを用い
て実施例１と同様にして表示機能を調べた結果
を、表１に示す。
[Industrial Field of Application] The present invention relates to an apparatus in which conductive colored fine powder is fixed by electric adsorption force, thereby recording or displaying. [Prior art] Conventionally, CRT display devices,
Liquid crystal display devices, light emitting diode display devices, fluorescent display devices, plasma display devices, electrochromic display devices, etc. are well known, but displaying large screens requires advanced technology, is difficult, and is extremely expensive. It has various disadvantages, such as poor visibility, reduced definition, and flickering of the display, which causes severe visual fatigue. Therefore, several new display devices have been proposed to replace these display devices. For example, a device that uses a photoconductive layer to electrically adsorb conductive colored magnetic fine powder at the same time as exposure (Japanese Patent Application No. 56-197410, Japanese Patent Publication No. 03-64864)
There is a device (Utility Model Application No. 57-55061) that forms an electric latent image on a dielectric material using a pin electrode, etc., and then electrically adsorbs insulating colored fine powder to the latent image to display the image. A device that electrically attracts and displays conductive colored magnetic fine powder using
No. 46707), a device that displays conductive colored magnetic fine powder using magnetic adsorption force using an easily magnetized stylus. The above-mentioned devices are capable of high-definition display in principle, large-screen display is simple and inexpensive, and because they are displayed using colored fine powder, the displayed image does not flicker and has excellent visual acuity. It is attracting attention due to its advantages such as relatively little labor. However, on the other hand, it has not been put into practical use because it is insufficient in terms of high contrast, long life, stability under low environmental conditions, and high reliability required for display devices. [Problems to be Solved by the Invention] The object of the present invention is based on an image forming method known as the so-called magnetic stylus, which is known from Japanese Patent Publication No. 51-46707, etc. An object of the present invention is to provide a recording/displaying device that exhibits high contrast and excellent recording or displaying characteristics in a recording/displaying device that displays by electrically attracting magnetic fine powder. [Means and effects for solving the problems] The present invention provides an image holding member and a plurality of divided electrodes that are arranged so as to be separated and face each other with conductive colored fine powder interposed therebetween, and the image holding member In a recording and display device in which electrically conductive colored magnetic fine powder is electrically attached to an image holding member by applying a voltage between the image holding member and the electrode, the image holding member comprises at least a conductive layer and a diffuse reflection layer. , the diffuse reflection layer had a structure in which insoluble fine particles were dispersed in a binding resin, and the total amount of the binding resin (A) and the total amount of the fine particles (B) were set to B/A 1.8. It is characterized by The recording or display means applied to the present invention is
This is what is called a magnetic stylus. That is, the principle is as shown in FIG. 4, a cylindrical magnet 2 is rotated within a non-magnetic cylinder 3, and a colored conductive colored magnetic fine powder 1 is conveyed over this non-magnetic cylinder 3. It passes over needle-shaped recording electrodes 4 that are densely arranged along the axial direction on the non-magnetic cylinder 3. Then, a voltage is applied between the recording electrode 4 and the conductive layer 7 of the image holding member 5, which is composed of the recording layer 6 on the front side and the conductive layer 7 on the back side, according to the image information,
An image is formed by attaching conductive colored magnetic fine powder to the image holding member 5 only in the area where the applied voltage is applied. A cleaning member may be provided to remove the displayed image on the image holding member, and blade cleaning, fur cleaning, suction cleaning, magnetic brush cleaning, etc. used for removing fine powder may be provided. As a cleaning method, it is more effective to electrically remove the charges induced on the recording medium through a cleaning member so as to remove the charges induced on the surface of the image holding part. An effective method is to arrange a magnet adjacent to the body surface and ground it by interposing conductive colored magnetic fine powder used for display. In such a recording/displaying means, the following methods can be considered to increase the contrast of the image holding member. A method of making the light reflecting surface uneven and reflecting it diffusely. A method using an anodic oxide film of aluminum (disclosed in Japanese Patent Publication No. 51-46707). However, in this method, conductive colored magnetic fine powder is trapped in the recesses, resulting in a decrease in contrast.
Undesirable. With this method, cracks occur during anodic oxidation, which tends to cause voltage leaks, the surface becomes uneven, which causes the same problems as the method, and the whiteness of the anodic oxide film is low, making it difficult to obtain sufficient contrast. In addition, when the environment changes, voltage leaks occur frequently, resulting in problems such as a decrease in recording or display density and insufficient contrast. As a result of intensive research, the present inventors found that the image holding member is a laminate of at least a conductive layer and a diffuse reflection layer, and the diffuse reflection layer has a structure in which organic or inorganic fine particles are dispersed in a binding resin. By doing so, the above-mentioned problems could be solved. In other words, since the diffuse reflection layer uses a binding resin as one component, the uniformity of the surface is improved, and internal cracks can be removed, which reduces the trapping of conductive colored magnetic fine powder by the uneven surface. is measured, and voltage leaks can be prevented. Further, since fine particles are dispersed in the binding resin, the whiteness is significantly improved due to interfacial reflection due to the difference in refractive index at the interface, and the contrast is improved. However, it has also been revealed that certain conditions exist for the proportions of the constituent components of the diffuse reflection layer. That is, when the proportion of insoluble fine particles in the diffuse reflection layer increases, the spaces between the fine particles are not completely filled with the resin continuous phase, and voids are created between the fine particles.
As the image holding member is repeatedly used, this void becomes filled with conductive colored magnetic fine powder, and as a result,
Light is absorbed on the surface of the diffuse reflection layer, resulting in a decrease in whiteness, which causes a decrease in contrast in recording or display. In order to eliminate this inconvenience, the present inventors investigated the relationship between the ratio B/A of the weight of the binding resin (A) and the weight of the insoluble fine particles (B) in the diffuse reflection layer, and found that FIG. Results similar to those shown were obtained. Although the size of individual voids differed depending on the particle size of the insoluble fine particles, no significant difference was observed in the total amount of voids. Originally, the purpose was to prevent voids in the diffuse reflection layer, so it should be defined by the porosity, but from the above point it was found that the composition ratio can be used instead. Based on FIG. 5, it is clear that when the B/A ratio is 1.8 or more, the whiteness is significantly reduced due to the adhesion of the conductive colored magnetic fine powder to the diffuse reflection layer during repeated use. The diffuse reflection layer can be formed, for example, by a method of mixing incompatible polymers and forming a film, or by a method of dispersing insoluble fine particles in a binding resin. Insoluble fine particles can be selected from a wide range of inorganic or organic materials, such as metal oxides such as titanium oxide, magnesium oxide, barium oxide, and calcium oxide, metal sulfates such as barium sulfate and magnesium sulfate, barium carbonate, magnesium carbonate, and carbonic acid. These include fine particles of carbonate metal salts such as calcium, or hardening resins. Examples of the binding resin include polyester, acrylic resin, polyolefin, polyacetal, polyamide, polystyrene, halogen-containing resin, silicone resin, polyether, polycarbonate, vinyl acetate resin, cellulose resin, and copolymers thereof. Thermoplastic resins such as phenolic resins, xylene resins, petroleum resins,
There are thermosetting resins represented by single substances or copolymers such as urea resin, melamine resin, unsaturated polyester, alkyd resin, epoxy resin, silicone resin, and furan resin, and these resins can also be used as a mixture. In the present invention, the "diffuse reflection" of the diffuse reflection layer means:
It has a reflective property that forms a reflected light component other than specularly reflected light, and is defined by the ratio of the intensity of the specularly reflected light component to the intensity of the non-reflected light component, and the more the non-reflected light component, the better the diffuse reflectance. It becomes something. Recording and display devices are required to have less dependence of contrast on the viewing angle, that is, to have an excellent diffuse reflection layer, so it is necessary to increase the non-reflected light component. There are several ways to specify diffuse reflectance.
In the present invention, from the viewpoint of simplicity and practicality, the whiteness is defined based on the reflection density obtained with a Masbeth densitometer or a similar functional product, based on the following. Whiteness = [(1.44 - Reflection density) / (1.44 + 0.44)] × 100 Whiteness 100: Reflection density 0.04 (nearly everyone described it as pure white in the panel test) Whiteness 0: Reflection density 1.44 (almost 1.44 in the panel test) (Everyone expresses it as black. Also, there is no contrast at all.) Based on this definition of whiteness, the contrast of recording or display is the difference between the whiteness of the image holding body and the whiteness of the recording or display unit. It can be stipulated that Therefore, a decrease in the whiteness of the image holding member inevitably results in a decrease in contrast, resulting in insufficient recording or display. Until now, such recording or display methods have not been able to obtain the necessary contrast due to insufficient whiteness, but in the present invention, the diffuse reflection layer is composed of a binding resin and fine particles dispersed therein.
% or more of whiteness was obtained, and sufficient contrast could be obtained. On the other hand, the diffuse reflection layer is a layer that has sufficient electrical resistance and does not easily become conductive, or it is a layer that generates a substantial potential when charged and functions to generate sufficient contrast. Therefore, the state in which it should function as an image holding member depends on some factors depending on the conditions of use, but when aiming for high contrast as in the present invention, the state in which the image holding member should function is
Since it is necessary to maintain 50% or more of the initial charging voltage at sec or more, the specific electrical resistance of the diffuse reflection layer is
10 12 Ω・cm or more. When aiming for higher contrast, the specific electrical resistance of the diffuse reflection layer is
10 13 Ω・cm or more is desirable. In the recording/display device of the present invention, the display characteristics are proportional to the amount of charge generated in the charged layer, so it is somewhat related to the degree of coloring of the conductive colored magnetic fine powder forming the display, but in principle, the film of the charged layer is Assuming that the thickness is t and the voltage applied when forming a display is V, the formula for obtaining sufficient contrast is V15 (V/μm)×t (μm). In order to obtain even higher contrast, V20 (V/μm)×t (μm) is desirable. Considering the matching with the drive circuit, the voltage
Since it is relatively easy to output at a voltage of about 100 V or less, it is practical for the film thickness during charging to be 7 μm or less, preferably 5 μm or less. Further, research has revealed that the effects of the present invention are not impaired even if an intermediate layer is provided between the conductive layer and the diffuse reflection layer to improve adhesion in order to prevent separation between the conductive layer and the diffuse reflection layer. The conductive layer in the present invention is a layer that has sufficiently low electrical resistance and is easily conductive, in other words, a layer that functions so as not to generate a substantial potential when charged. Therefore, the state in which the conductive layer should function depends on some factors depending on the conditions of use, but when aiming for high contrast as in the present invention, the floating potential generated in the conductive layer causes a decrease in contrast. Therefore, it can be said that it is sufficiently conductive if it decays to 1/10 or less of the initial charging potential within 100 msec after charging, so the specific electrical resistance of the conductive layer is 10 12 Ω・cm
becomes. If the aim is to display images at higher speeds, it is required to attenuate to 1/10 or less of the initial charging potential within 1 msec after charging, so it is desirable that the specific electrical resistance of the conductive layer is 10 10 Ω・cm or less. . The materials forming the conductive layer are aluminum, iron,
The above-mentioned conductive substance is powdered in a continuous phase such as a single substance or a composite of conductive metals such as gold, tin, and zinc, conductive inorganic compounds such as carbon, tin oxide, indium oxide, and antimony oxide, or a polymer. In particular, in order to improve the contrast in recording or display, it is desirable that the conductive layer has low light absorption and excellent light reflection. Next, although the conductive colored fine powder is not a condition that limits the present invention, it is mainly composed of a binder, conductive powder, magnetic material, and, if necessary, various dyes and pigments as colorants. It is. As the binder, the above-mentioned binding resin is used, and is generally used in an amount of 15 to 60% by weight. Conductive powders include conductive carbon, fine powders of various conductive metals, and fine powders of conductive oxides such as zinc oxide, tin oxide, indium oxide, and antimony oxide, and are generally used in an amount of 2 to 30% by weight. be done. Further, as the magnetic material, ferric oxide or the like is used in an amount of 20 to 80% by weight. Furthermore, the coloring agent used as necessary is a dye or pigment including various phthalocyanines and malachite green in a range of 15 to 20% by weight. Heat each component listed above to about 100 to 300℃, mix uniformly, cool and grind into fine powder, or remove powder with unnecessary particle size by 2-class classification if necessary. By doing so, the desired conductive colored magnetic fine powder can be obtained. It generally has an average particle size of about 5 to 20 μm, and its specific electrical resistance is from 10 3 Ω・cm at an applied voltage of 100 V or less in a conductive colored fine powder storage container.
Those in the range of 10 9 Ω・cm are used. On the other hand, to introduce the general process conditions of the recording/display device of the present invention, firstly, as rotating magnetic poles, magnetic poles with a configuration of about 6 to 50 poles and about 500 to 2000 Gauss are used, rotating at a rotation speed of about 300 to 7000 rpm. .
As the non-magnetic cylinder, a single or composite molded product of non-magnetic metal such as aluminum or stainless steel, or plastic or various inorganic oxides is used, and this may be used in a rotating or non-rotating state. As a recording electrode, the electrode width is 0.1 to 1 mm;
An applied voltage of 10 to 100 V is used with an electrode spacing of 0.1 to 1 mm. The moving speed of the recording medium is 50 to 700 m/
sec, and the distance to the electrode is set to about 50 to 500 μm. The configuration of the model of the image holding body according to the present invention is illustrated in FIG. 3. That is, Figure A shows a structure in which a diffuse reflection layer 6a is laminated on one side of a support 7, which is a conductive layer 7, and Figure B shows a structure in which a diffuse reflection layer 6a is laminated on one side of a support 30 via a conductive layer 7a. shows a layered structure. Examples Hereinafter, the present invention will be explained in more detail with reference to Examples and Comparative Examples. Example 1 A recording and display device shown in FIG. 1 was manufactured. 5 is an image holding member formed in the shape of an endless belt;
It is composed of a conductive support 7 and a diffuse reflection layer 6. Note that the image holding body 5 may be in the form of a belt that is not endless. The image holding body 5 is wound around a pair of rollers 11 and 11' arranged vertically opposite to each other.
In the display section 18, the back plate 16 and the rollers 11,
11', supported in a planar and movable manner;
During image formation, it is driven in the direction of the arrow. The lowest position of the circulation path of the image holding body 5, that is, the roller 1
A means 17 for forming a display by attaching conductive colored magnetic fine powder 1 as a display substance to the image holding member 5 in accordance with display information is disposed at a position facing 1'. In addition, conductive colored magnetic fine powder 1
is stored in container 9. Information obtained from the document reading device 15 based on the display forming means 17 is applied as an electrical signal to the recording electrode 4 by the recording control section 13 via the storage device 14. Note that 8 is a transparent plate, 12 is a cleaning member, and 18 is a display section. Average particle size for 30 parts by weight of polyester resin, which is a condensation polymer of terephthalic acid and ethylene glycol.
30 parts by weight of fine particles of titanium oxide with a diameter of 0.5 μm were melted and dispersed at 200°C, and this dispersion was extruded into a film through a T-shaped die and thermally laminated on one side of an aluminum foil with a thickness of 50 μm to form a white film with a thickness of 5 μm. An image holding member was manufactured using the following steps. The image holding body manufactured in this way was installed in the apparatus shown in FIG. 1, and its display function was examined. In addition,
The conductive colored magnetic fine powder used was composed of 30 parts by weight of bisphenol A type epoxy resin, 10 parts by weight of conductive carbon, and 60 parts by weight of ferric oxide, and had an average particle size of 10 μ and a specific electrical resistance of 10 6 Ω・cm. (100V applied). In addition, the rotating magnetic pole is 16 poles, 900 gaum, outer diameter 36φ
The rotation speed was 2200 rpm in the opposite direction to the moving direction of the image holding member. The non-magnetic cylinder has a wall thickness of 1 mm.
A 200 μm thick polyimide film with an outer diameter of 40φ and etched electrodes with an electrode width of 0.5 mm and an electrode spacing of 0.25 mm was adhered to the outer surface of a non-magnetic cylinder. .
The voltage applied to the electrodes was 40V. Under these conditions, the image holding member was transported at a speed of 220 mm/sec, and the display function was examined. The results are shown in Table 1. Example 2 An image holding member was manufactured in the same manner as in Example 1, except that a diffuse reflection layer was formed using 30 parts by weight of polyester and 54 parts by weight of titanium oxide fine particles, and the display function was examined in the same manner. Table 1 shows the results. Comparative Example 1 An image holding member was produced in the same manner as in Example 1, except that a diffuse reflection layer was formed using 30 parts by weight of polyester and 60 parts by weight of titanium oxide fine particles.
After that, we investigated the display function in the same way. The results are shown in Table 1. Comparative Example 2 An image holding member was produced in the same manner as in Example 1, except that a diffuse reflection layer was formed using 30 parts by weight of polyester and 90 parts by weight of titanium oxide fine particles.
After that, we investigated the display function in the same way. The results are shown in Table 1. Comparative example 3 30 parts by weight of polyester, 120 parts by weight of titanium oxide fine particles
An image holding member was manufactured in the same manner as in Example 1, except that the diffuse reflection layer was formed using parts by weight,
After that, we investigated the display function in the same way. Table 1 shows the results.
Shown below. Comparative Example 4 An aluminum foil with a thickness of 50 μm was immersed in an aqueous solution (temperature 30°C) with an oxalic acid concentration of 7% by weight, and the voltage was
A DC voltage of 50 V (current density 1 A/dm 2 ) was applied for 20 minutes, and an alumite layer with a thickness of 10 μm was provided by anodizing treatment to form an image holding member. Using this, the display function was investigated in the same manner as in Example 1, and the results are shown in Table 1.
【表】【table】
【表】
これらの結果を第５図にまとめた
実施例 ３
厚み100μｍのポリエステルフイルムの表面に
800Åの膜厚でアルミニウムを蒸着し、下記の塗
工により塗料を厚み4μｍに塗布し、像保持部体
とした。
塗工：平均粒子径1.0μｍの硫酸バリウム粉末54重
量部と熱硬化性フエノール樹脂30重量部をメチ
ルエチルケトン810重量部とともにボールミル
で10時間分散せしめ、分散平均粒子径1.2μｍの
調合液をリバースロールコータで塗布し、140
℃、５分間加熱した。
像保持部体の表示機能を表２に示す。
実施例 ４
実施例３において硫酸バリウムの代わりに平均
粒子径0.8μの炭酸カルシウムを用いたことを除
き、実施例３と同様にして像保持部体を製造し、
その表示機能を調べた。結果を表２に示す。[Table] These results are summarized in Figure 5. Example 3 On the surface of a 100 μm thick polyester film
Aluminum was vapor-deposited to a thickness of 800 Å, and a paint was applied to a thickness of 4 μm by the following coating method to form an image holding member. Coating: 54 parts by weight of barium sulfate powder with an average particle size of 1.0 μm and 30 parts by weight of thermosetting phenolic resin were dispersed with 810 parts by weight of methyl ethyl ketone in a ball mill for 10 hours, and the mixture with a dispersed average particle size of 1.2 μm was coated using a reverse roll coater. Apply at 140
℃ for 5 minutes. Table 2 shows the display function of the image holding member. Example 4 An image holding member was manufactured in the same manner as in Example 3, except that calcium carbonate with an average particle size of 0.8μ was used instead of barium sulfate in Example 3,
I investigated its display function. The results are shown in Table 2.
本発明によれば、高コントラストならびに優れ
た記録もしくは表示特性を示す記録表示装置を提
供することができる。
According to the present invention, it is possible to provide a recording/display device exhibiting high contrast and excellent recording or display characteristics.
第１図および第２図は本発明のそれぞれ異なる
実施例を示す読取表示装置の縦断面図である。第
３図は本発明の読取表示装置に装着される像保持
部体のモデルの断面図である。第４図は本発明に
適用される記録もしくは表示手段の原理を示すも
のである。第５図は上記像保持部体の構成と白色
度の関係を示す線図である。
１……導電性着色磁性微粉体、２……磁石、３
……非磁性円筒、４……針状記録電極、５……像
保持部体、６……記録層、６ａ……拡散反射層、
７，７ａ……導電層、１１，１１′……ローラ、
１２……クリーニング部材、１３……記録制御
部、１４……記憶装置、１５……原稿読取装置、
１６……背板、１７……画像形成手段、１９，１
９′，１９″……ローラ、２０……筆記媒体、２１
……消去部材、２２……画像読取手段、２４……
ランプ、２５……レンズ、２６……光電変換素
子、２７……ミラー、２８……符号化復合化回
路、２９……プリンタ。
FIGS. 1 and 2 are longitudinal cross-sectional views of reading and display devices showing different embodiments of the present invention. FIG. 3 is a sectional view of a model of an image holding body mounted on the reading display device of the present invention. FIG. 4 shows the principle of the recording or display means applied to the present invention. FIG. 5 is a diagram showing the relationship between the structure of the image holding member and whiteness. 1... Conductive colored magnetic fine powder, 2... Magnet, 3
...Nonmagnetic cylinder, 4...Acicular recording electrode, 5...Image holding member, 6...Recording layer, 6a...Diffuse reflection layer,
7, 7a... conductive layer, 11, 11'... roller,
12...Cleaning member, 13...Recording control unit, 14...Storage device, 15...Document reading device,
16... Back plate, 17... Image forming means, 19,1
9', 19''...Roller, 20...Writing medium, 21
... Erasing member, 22 ... Image reading means, 24 ...
Lamp, 25...Lens, 26...Photoelectric conversion element, 27...Mirror, 28...Encoding/decoding circuit, 29...Printer.
Claims (1)
性着色磁性微粉体を介して隔離対向するように配
設し、該像保持部体と該電極間に電圧を印加して
像保持部体に電気的に導電性着色磁性微粉体を付
着させる記録もしくは表示装置において、上記像
保持部体を少なくとも導電層と拡散反射層とで構
成し、該拡散反射層を結着性樹脂中に不溶性の微
粒子を分散させた構成とするとともに、該結着性
樹脂の総量(A)と該微粒子の総量(B)をＢ／Ａ1.8
としたことを特徴とする記録表示装置。 ２ 前記像保持部体の白色度が60％以上である特
許請求の範囲第１項記載の記録表示装置。 ３ 前記拡散反射層の固有電気抵抗が1012Ω・cm
以上である特許請求の範囲第１項記載の記録表示
装置。[Scope of Claims] 1. An image holding member and a plurality of divided electrodes are arranged so as to face each other in isolation via conductive colored magnetic fine powder, and a voltage is applied between the image holding member and the electrodes. In a recording or display device in which electrically conductive colored magnetic fine powder is electrically attached to an image holding member by applying an electric current, the image holding member is composed of at least a conductive layer and a diffuse reflection layer, and the diffuse reflection layer is In addition to having a structure in which insoluble fine particles are dispersed in a binding resin, the total amount of the binding resin (A) and the total amount of the fine particles (B) are B/A1.8.
A recording display device characterized by: 2. The recording and display device according to claim 1, wherein the image holding member has a whiteness of 60% or more. 3 The specific electrical resistance of the diffuse reflection layer is 10 12 Ω・cm
The recording and display device according to claim 1, which is the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27938787A JPH01121890A (en) | 1987-11-06 | 1987-11-06 | Recording display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27938787A JPH01121890A (en) | 1987-11-06 | 1987-11-06 | Recording display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01121890A JPH01121890A (en) | 1989-05-15 |
| JPH0581911B2 true JPH0581911B2 (en) | 1993-11-16 |
Family
ID=17610427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27938787A Granted JPH01121890A (en) | 1987-11-06 | 1987-11-06 | Recording display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01121890A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6396525B1 (en) * | 2000-11-07 | 2002-05-28 | Hewlett-Packard Company | Electronic display devices and methods |
-
1987
- 1987-11-06 JP JP27938787A patent/JPH01121890A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01121890A (en) | 1989-05-15 |
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