JPH0795172B2 - Display device - Google Patents
Display deviceInfo
- Publication number
- JPH0795172B2 JPH0795172B2 JP63308914A JP30891488A JPH0795172B2 JP H0795172 B2 JPH0795172 B2 JP H0795172B2 JP 63308914 A JP63308914 A JP 63308914A JP 30891488 A JP30891488 A JP 30891488A JP H0795172 B2 JPH0795172 B2 JP H0795172B2
- Authority
- JP
- Japan
- Prior art keywords
- polymer gel
- electrode
- polymer
- display device
- conductive
- 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
- 229920000642 polymer Polymers 0.000 claims description 30
- 239000008151 electrolyte solution Substances 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 8
- 239000000499 gel Substances 0.000 description 31
- 150000002500 ions Chemical class 0.000 description 14
- 229920001940 conductive polymer Polymers 0.000 description 12
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 8
- 230000008961 swelling Effects 0.000 description 8
- 239000003792 electrolyte Substances 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 229910052697 platinum Inorganic materials 0.000 description 4
- 229920000128 polypyrrole Polymers 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- -1 folyacetylene Polymers 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000004584 polyacrylic acid Substances 0.000 description 2
- 229920000767 polyaniline Polymers 0.000 description 2
- 229920000123 polythiophene Polymers 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 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
- 230000007704 transition Effects 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 150000003926 acrylamides Chemical class 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012769 display material Substances 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 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
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 229920001197 polyacetylene Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、pH及び（又は）イオン濃度などの変化により
膨潤・収縮する高分子ゲルを表示材として使用した、デ
ィスプレーなどに利用される非発光型の良画質の表示装
置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is used for displays and the like which use a polymer gel that swells and contracts due to changes in pH and / or ion concentration as a display material. The present invention relates to a light-emitting type display device with good image quality.
特に、本発明は、電極上に設けた導電性高分子膜のドー
ピング・脱ドーピング反応に伴うpH及び（又は）イオン
濃度等の変化によって高分子ゲルの膨潤・収縮現象を利
用した非発光型表示装置に関する。In particular, the present invention is a non-emissive display that utilizes the swelling / shrinking phenomenon of a polymer gel due to changes in pH and / or ion concentration accompanying the doping / dedoping reaction of a conductive polymer film provided on an electrode. Regarding the device.
高分子ゲルが温度、溶媒組成（例えば電解液）、イオン
強度、電場等によって、膨潤・収縮といった可逆的な体
積相転移現象を起こし、このような現象を表示装置、光
学素子、センサー等に応用できることは、「日経サイエ
ンス」第３巻第80頁1981年発行等により知られている。Polymer gel causes reversible volume phase transition phenomena such as swelling and contraction due to temperature, solvent composition (eg, electrolyte), ionic strength, electric field, etc., and applies such phenomenon to display devices, optical elements, sensors, etc. What can be done is known from "Nikkei Science," Vol. 3, page 80, published in 1981.
表示装置等として応用する場合に、温度あるいは電場に
よって体積相転移を生じさせて色相、明暗等を変化させ
る方法が、特開昭61-149923号公報、特開昭61-149926号
公報等に述べられている。When applied as a display device, etc., a method of causing a volume phase transition by temperature or an electric field to change hue, brightness, etc. is described in JP-A-61-149923 and JP-A-61-149926. Has been.
然しながら、このような温度、電場等の物理的手段によ
る方法を用いると、高分子ゲルの劣化が著しくて、実用
性に乏しい。However, when a method using physical means such as temperature and electric field is used, the polymer gel is significantly deteriorated and is not practical.
本発明は、従来公知の高分子ゲルの膨潤・収縮現象を利
用し、その膨潤・収縮させる新しい方法として導電性高
分子のドーピング・脱ドーピング反応を適用することに
より、非発光型で視野角の広い良画質の表示装置を提供
するものである。INDUSTRIAL APPLICABILITY The present invention utilizes the swelling / shrinking phenomenon of a conventionally known polymer gel, and by applying a doping / dedoping reaction of a conductive polymer as a new method of swelling / shrinking the polymer gel, a non-emission type and a viewing angle It is intended to provide a wide display device with good image quality.
本発明者らは、ポリアセチレン、ポリピロール、ポリチ
オフェン、ポリアニリンなどに代表される導電性高分子
が、電位の変化に対応して電気化学的にドーピング・脱
ドーピング反応を行える点に着目し、この反応に基づく
電解液中のイオンの取り込み、放出と、高分子ゲルの膨
潤・収縮現象とを結合させて、pH又はイオン濃度の変化
によって高分子ゲルが可逆的に膨潤・収縮する仕組みを
表示装置に適用して、本発明を完成するに至った。The present inventors have focused on the fact that conductive polymers represented by polyacetylene, polypyrrole, polythiophene, polyaniline, etc. can electrochemically perform doping / dedoping reactions in response to changes in potential. Applying a mechanism to reversibly swell and shrink polymer gels due to changes in pH or ion concentration by combining the uptake and release of ions in the electrolyte based on the swelling and shrinking phenomena of polymer gels Then, the present invention was completed.
即ち、本発明は；少なくとも表示側における表示部が透
光性である一対の基板と、両基板の間に収容された電解
液と、電気化学的に電解液中のpH及び（又は）イオン濃
度を変化させることのできる導電性膜を、少なくとも一
方の電極上に設けてなる一対の電極と、この導電性膜に
固定あるいは近接させて、前記PH及び（又は）イオン濃
度の変化によって膨潤・収縮する高分子ゲルを設けてな
る、表示装置である。That is, the present invention includes: a pair of substrates, at least the display portion of which is transparent on the display side, an electrolytic solution housed between the two substrates, and a pH and / or ion concentration electrochemically in the electrolytic solution. A conductive film capable of changing the temperature is fixed to or close to a pair of electrodes provided on at least one of the electrodes, and the conductive film swells and contracts due to changes in the PH and / or ion concentration. It is a display device provided with a polymer gel.
本発明に用いられる導電性材料としては、電子供与体ま
たは受容体のドープによって導電性を有するものであ
り、電圧の印加など電極への電気信号に応じて、電解液
中で可逆的な酸化・環元反応を生じ、電解液中の解離し
た電解液のイオンをドープ、（脱ドープ）することので
きるものを云う。例えば、ホリアセチレン、ポリピロー
ル、ポリチオフェン、ポリアニリンなどの導電性高分子
や酸化タングステン等の無機化合物が挙げられる。特
に、導電性高分子を用いた場合には、膜状体にすること
によりその使用範囲が広くなり、しかも電解重合など膜
合成及びその面積制御が容易であり、さらに大面積化が
可能であるという利点がある。The conductive material used in the present invention has conductivity by doping with an electron donor or an acceptor, and reversibly oxidizes / reduces in an electrolytic solution in response to an electric signal to an electrode such as application of voltage. It refers to a substance capable of undergoing a ring-back reaction and doping (dedoping) ions of the dissociated electrolytic solution in the electrolytic solution. Examples thereof include conductive polymers such as folyacetylene, polypyrrole, polythiophene, and polyaniline, and inorganic compounds such as tungsten oxide. In particular, when a conductive polymer is used, it is possible to widen the range of use by forming it into a film, and it is easy to perform film synthesis such as electrolytic polymerization and its area control, and it is possible to increase the area. There is an advantage.
すなわち、このような導電性高分子を、白金等の電極表
面に電解重合などにより被覆させたものを第１電極（作
用電極）として用い、これを第２電極（対電極）ととも
に電解液中に浸しておくと、電極に電気信号に応じて電
圧を印加すると、導電性高分子が酸化されて、電解液中
の解離したイオンが導電性高分子中にドープされる。こ
のように電圧印加の大小に応じて導電性高分子のドープ
量が調整でき、電解液のpHあるいはイオン濃度が自由に
制御できる。That is, a conductive polymer such as platinum coated on the surface of an electrode by electrolytic polymerization or the like is used as a first electrode (working electrode), which is used together with a second electrode (counter electrode) in an electrolytic solution. When soaked, when a voltage is applied to the electrodes according to an electric signal, the conductive polymer is oxidized and the dissociated ions in the electrolytic solution are doped into the conductive polymer. In this way, the doping amount of the conductive polymer can be adjusted according to the magnitude of voltage application, and the pH or ion concentration of the electrolytic solution can be freely controlled.
ところで、この場合、導電性高分子（膜）に固定してあ
るいは近接させて、イオンなどの変化によって膨潤・収
縮できる高分子ゲルを設けておくと、電位の変化に応じ
て上述のpHあるいはイオン濃度の変化が生じ、これによ
り高分子ゲルが可逆的に膨潤・収縮し、この際の光学的
な大きな差異を表示装置のディスプレーに応用したもの
である。By the way, in this case, if a polymer gel that can be swollen / contracted by changes in ions etc. is provided by being fixed to or in close proximity to the conductive polymer (membrane), the above-mentioned pH or ions will be changed according to changes in the potential. A change in concentration occurs, which causes the polymer gel to swell and contract reversibly, and the large optical difference at this time is applied to the display of a display device.
本発明における、膨潤・収縮が可能な高分子ゲルとして
は、電場、温度、イオン強度、溶媒組成等の変化によ
り、液体を吸収して膨潤し、また液体を吐き出して収縮
する液体吸収性ポリマーであり、これには、通常液体吸
収性高分子として周知のアクリル化合物や架橋性モノマ
ーなどをグラフト重合したポリエーテル、ポリビニルア
ルコール、セルロース、デンプン、ポリアクリル酸系材
料を挙げうるが、特にアクリルアミド誘導体を主成分と
し、イオン解離モノマー及び（又は）架橋性モノマーを
重合させた架橋性モノマー、メタクリル酸メチルとアク
リル酸との共重合体、ポリアクリル酸塩などが好ましく
使用しうる。In the present invention, the polymer gel capable of swelling / shrinking is a liquid-absorbing polymer that absorbs a liquid and swells due to changes in electric field, temperature, ionic strength, solvent composition, etc. There are, for example, polyether, polyvinyl alcohol, cellulose, starch, and polyacrylic acid-based materials obtained by graft-polymerizing acrylic compounds and cross-linking monomers that are commonly known as liquid-absorbent polymers, and especially acrylamide derivatives. As the main component, a crosslinkable monomer obtained by polymerizing an ion dissociation monomer and / or a crosslinkable monomer, a copolymer of methyl methacrylate and acrylic acid, a polyacrylic acid salt and the like can be preferably used.
本発明に使用する電解液としては、塩化カルシウム、塩
化カリウム、塩化ナトリウム、過塩素酸リチウム、塩化
アンモニウムなどの電解質を、水、メタノール、プロピ
レンカーボネート、ピロリドン、クロロホルム、ジメチ
ルスルホキシド等の高分子ゲル内に入り込み得る有機溶
媒又はこれらの混合溶媒に、溶解した液が使用しうる。As the electrolytic solution used in the present invention, calcium chloride, potassium chloride, sodium chloride, lithium perchlorate, an electrolyte such as ammonium chloride, water, methanol, propylene carbonate, pyrrolidone, chloroform, in a polymer gel such as dimethyl sulfoxide A liquid dissolved in an organic solvent that can enter or a mixed solvent thereof can be used.
第１電極としては、ステンレススチール、白金、金、ニ
ッケルなどの金属の他、酸化すずなどの膜、またはそれ
らの金属蒸着膜を被覆したガラスなどの導電性材料が用
いられるが、使用する電解液に耐腐食性を示す白金、金
が好ましく使用できる。第１電極上に導電性膜を形成す
るには、導電性高分子を用いる電解重合によるのが密着
性、膜厚の調節、膜面積のコントロールなどの点から好
ましいが、他に蒸着又は、圧着法も利用しうる。As the first electrode, in addition to metals such as stainless steel, platinum, gold, and nickel, a film of tin oxide or a conductive material such as glass coated with a metal vapor deposition film of these is used. Platinum and gold, which show corrosion resistance, can be preferably used. In order to form a conductive film on the first electrode, electrolytic polymerization using a conductive polymer is preferable in terms of adhesion, adjustment of film thickness, control of film area, etc. Law can also be used.
第２電極には、第１電極と同様の材料で構成させること
ができるが、一般には、カーボン、グラファイト、ステ
ンレススチール、酸化すず膜被覆ガラスなどの導電性基
材から構成されていて、第１の電極の対（向）電極とし
て作用する。The second electrode can be made of the same material as the first electrode, but is generally made of a conductive base material such as carbon, graphite, stainless steel, tin oxide film-coated glass, and the like. It acts as a counter electrode for the electrode.
導電性膜に固定又は近接して高分子ゲルを設けるには、
このゲルは画素の配列に対応して配置されるのが好まし
く、画素空間内に１個のゲルの占有に限らず、複数の微
小なゲルを存在させるのが好ましく、導電膜上に化学的
又は物理的方法により固定させるか、あるいは、画素空
間内の電解液中に分散させうる。To provide a polymer gel on or near the conductive film,
This gel is preferably arranged corresponding to the arrangement of pixels, and it is preferable that a plurality of minute gels are present, not limited to the occupancy of one gel in the pixel space. It can be fixed by physical methods or dispersed in the electrolyte in the pixel space.
次に、図示例に従って、本発明を具体的に説明する。Next, the present invention will be specifically described with reference to the illustrated example.
第１〜２図は、本発明の表示装置を構成するマトリック
ス状に並んだ多数の画素の１つの断面を示し、第１図
は、高分子ゲルが収縮状態の場合を、第２図は膨潤状態
の場合を夫々示す、例示的略図である。絶縁基板１およ
び隣接画素との仕切り２に囲まれたセルの絶縁基板１底
面に白金からなる第１電極５があり、外部から電圧信号
がかけられるよう接続されている。1 and 2 show one cross section of a large number of pixels arranged in a matrix which form the display device of the present invention. FIG. 1 shows the case where the polymer gel is in a contracted state, and FIG. 3 is an exemplary schematic diagram showing each of the states. A first electrode 5 made of platinum is provided on the bottom surface of the insulating substrate 1 of the cell surrounded by the insulating substrate 1 and the partition 2 between adjacent pixels, and is connected so that a voltage signal can be applied from the outside.
第１電極上に、NaCl電解質とピロール水溶液で電解重合
したポリピロールの導電性高分子膜６が被覆されてい
る。導電性膜６の上に１つ又は複数のメタクリル酸メチ
ルとアクリル酸との共重合体ゲルなどの高分子ゲル７が
固着あるいは近接して設けられている。The first electrode is coated with a conductive polymer film 6 of polypyrrole electropolymerized with a NaCl electrolyte and an aqueous solution of pyrrole. A polymer gel 7 such as one or more copolymer gels of methylmethacrylate and acrylic acid is fixed or provided in proximity to the conductive film 6.
セル内には色素を含む塩化カルシウムの水溶液の電解液
８が満たされている。セルにはAg・AgClの如き第２電極
３、更にその外側に透明板４によって密封されている。
外部電圧信号９は、第２電極３と第１電極５との間に印
加される。導電性膜側（第１電極５）に正電圧（＋0.6V
程度）をかけると、ポリピロールの導電性膜がOH-およ
びCl-イオンをドーピングすることにより、近傍のpHお
よびCa2+イオン濃度が変化して高分子ゲル７は収縮す
る。The cell is filled with an electrolytic solution 8 which is an aqueous solution of calcium chloride containing a dye. The cell is sealed with a second electrode 3 such as Ag / AgCl, and a transparent plate 4 on the outside thereof.
The external voltage signal 9 is applied between the second electrode 3 and the first electrode 5. Positive voltage (+ 0.6V) on the conductive film side (first electrode 5)
When the conductive film of polypyrrole is doped with OH − and Cl − ions, the pH and Ca 2+ ion concentration in the vicinity are changed and the polymer gel 7 contracts.
逆に第２図に示すように、導電性膜側に負電圧（−0.6V
程度）をかけると、OH-およびCl-イオンが導電性膜５か
ら脱ドーピングされ、高分子ゲル７′の浸透圧平衡がく
ずれ、膨潤する。このように、個々の画素を構成するセ
ル内の高分子ゲルの収縮・膨潤を電気信号によって可逆
的に行うことができる。高分子ゲルの収縮時、膨潤時の
体積比は数十倍にも及び、この差は光学的に明らかな差
異を示し、視覚に捉えられる。On the contrary, as shown in Fig. 2, a negative voltage (-0.6V
OH − and Cl − ions are dedoped from the conductive film 5, and the osmotic pressure equilibrium of the polymer gel 7 ′ is broken and the polymer gel swells. In this way, the contraction / swelling of the polymer gel in the cells forming the individual pixels can be reversibly performed by the electric signal. The volume ratio when the polymer gel contracts and when it swells is several tens of times, and this difference shows an optically clear difference and can be visually recognized.
なお、本発明においては、上記のような光学的差異をさ
らに鮮明にするために、電解液８又は高分子ゲル７に色
素又は色素を溶解又は分散させた着色液体を含ませるこ
とができる。In the present invention, in order to make the above-mentioned optical difference clearer, the electrolytic solution 8 or the polymer gel 7 may contain a pigment or a colored liquid in which the pigment is dissolved or dispersed.
また、仕切り２は、第1,2電極間に設けられて、両者が
互いに直接に接触しないように、ポリプロピレン、セル
ロース等の絶縁材から構成される。The partition 2 is provided between the first and second electrodes and is made of an insulating material such as polypropylene or cellulose so that the two do not come into direct contact with each other.
本発明は、高分子ゲルの膨潤・収縮を応用した表示装置
において、pHあるいはイオン濃度により膨潤・収縮を生
じさせる具体的方法を開発した点で有用であり、高分子
ゲルの劣化を招くことなく、非発光型、良画質の表示装
置を提供する効果がある。INDUSTRIAL APPLICABILITY The present invention is useful in developing a specific method for causing swelling / shrinking depending on pH or ion concentration in a display device to which swelling / shrinking of a polymer gel is applied, without causing deterioration of the polymer gel. It is effective to provide a non-emission type display device with good image quality.
第１〜２図は、本発明の表示装置を構成するマトリック
ス状に並んだ多数の画素の１つの断面を示すものであ
る。 第１図は、高分子ゲルが収縮状態の場合を、第２図は膨
潤状態を夫々示している。 １……絶縁基板 ２……仕切り ３……第２（対）電極 ４……透明基板 ５……第１（作用）電極 ６……導電性膜 ７……高分子ゲル（収縮状態） ７′……高分子ゲル（膨潤状態） ８……電解液 ９……外部電圧信号（印加）FIGS. 1 and 2 show one cross section of a large number of pixels arranged in a matrix which form the display device of the present invention. FIG. 1 shows the polymer gel in the contracted state, and FIG. 2 shows the swollen state. 1 ... Insulating substrate 2 ... Partition 3 ... Second (counter) electrode 4 ... Transparent substrate 5 ... First (working) electrode 6 ... Conductive film 7 ... Polymer gel (shrinking state) 7 ' …… Polymer gel (swollen state) 8 …… Electrolyte 9 …… External voltage signal (applied)
Claims (1)
である一対の基板と、両基板の間に収容された電解液
と、電気化学的に電解液中のpH及び（又は）イオン濃度
を変化させることのできる導電性膜を、少なくとも一方
の電極上に設けてなる一対の電極と、この導電性膜に固
定あるいは近接させて、前記PH及び（又は）イオン濃度
の変化によって膨潤・収縮する高分子ゲルを設けてな
る、表示装置。1. A pair of substrates, at least a display portion of which on the display side is translucent, an electrolytic solution contained between the substrates, and a pH and / or ion concentration in the electrolytic solution electrochemically. A conductive film that can be changed is fixed to or close to a pair of electrodes provided on at least one of the electrodes, and the conductive film swells and contracts due to changes in the PH and / or ion concentration. A display device provided with a polymer gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63308914A JPH0795172B2 (en) | 1988-12-08 | 1988-12-08 | Display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63308914A JPH0795172B2 (en) | 1988-12-08 | 1988-12-08 | Display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02156228A JPH02156228A (en) | 1990-06-15 |
| JPH0795172B2 true JPH0795172B2 (en) | 1995-10-11 |
Family
ID=17986793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63308914A Expired - Lifetime JPH0795172B2 (en) | 1988-12-08 | 1988-12-08 | Display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0795172B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6295167B1 (en) | 1998-07-06 | 2001-09-25 | Fuji Xerox Co., Ltd. | Optical material and optical device |
| US6850356B2 (en) | 2003-06-12 | 2005-02-01 | Fuji Xerox Co., Ltd. | Optical element and method for producing the optical element |
| US7435479B2 (en) | 2003-11-19 | 2008-10-14 | Fuji Xerox Co., Ltd. | Light-controlling element and method for manufacturing the same |
-
1988
- 1988-12-08 JP JP63308914A patent/JPH0795172B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6295167B1 (en) | 1998-07-06 | 2001-09-25 | Fuji Xerox Co., Ltd. | Optical material and optical device |
| US6850356B2 (en) | 2003-06-12 | 2005-02-01 | Fuji Xerox Co., Ltd. | Optical element and method for producing the optical element |
| US7435479B2 (en) | 2003-11-19 | 2008-10-14 | Fuji Xerox Co., Ltd. | Light-controlling element and method for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02156228A (en) | 1990-06-15 |
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