JP2532563B2 - Liquid crystal display - Google Patents
Liquid crystal displayInfo
- Publication number
- JP2532563B2 JP2532563B2 JP6103388A JP6103388A JP2532563B2 JP 2532563 B2 JP2532563 B2 JP 2532563B2 JP 6103388 A JP6103388 A JP 6103388A JP 6103388 A JP6103388 A JP 6103388A JP 2532563 B2 JP2532563 B2 JP 2532563B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- resin
- display device
- counter electrode
- 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 - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/321—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by conductive adhesives
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/36—Assembling printed circuits with other printed circuits
- H05K3/361—Assembling flexible printed circuits with other printed circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/36—Assembling printed circuits with other printed circuits
- H05K3/366—Assembling printed circuits with other printed circuits substantially perpendicularly to each other
Landscapes
- Liquid Crystal (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、耐湿性を有する液晶表示装置に関するもの
である。Description: TECHNICAL FIELD The present invention relates to a liquid crystal display device having moisture resistance.
従来の技術 従来の液晶表示装置の断面図を第６図に示す。この液
晶表示装置は、上基板１と下基板２をシール材３を介し
て接着し、その間に液晶４が封入されている。５は液晶
４に電圧を印加するための透明電極である。この液晶表
示パネルはリード電極５′が導電ゴム６により回路基板
７と接合される。2. Description of the Related Art A sectional view of a conventional liquid crystal display device is shown in FIG. In this liquid crystal display device, an upper substrate 1 and a lower substrate 2 are adhered to each other via a sealing material 3, and a liquid crystal 4 is sealed between them. Reference numeral 5 is a transparent electrode for applying a voltage to the liquid crystal 4. In this liquid crystal display panel, the lead electrode 5'is joined to the circuit board 7 by the conductive rubber 6.
発明が解決しようとする課題 この様な構造であると導電ゴム６とシール材３の空間
８の端子部に水分が付着した場合に毛細管現象によりそ
の水分が拡がってしまう。この様な状態で液晶表示装置
を駆動させると、透明電極を形成している金属酸化物が
電気化学反応で、金属に還元されて不伝導性となる、い
わゆる電蝕反応により断線状態となってしまうことが知
られている。With such a structure, when moisture adheres to the conductive rubber 6 and the terminal portion of the space 8 of the seal material 3, the moisture spreads due to a capillary phenomenon. When the liquid crystal display device is driven in such a state, the metal oxide forming the transparent electrode is electrochemically reduced to be nonconductive by a so-called electrolytic corrosion reaction, which causes a disconnection state. It is known to end up.
例えば駆動中の液晶表示装置が高温状態から低温状態
に移行した場合などに、水分が結露して上記電蝕反応が
起こり、液晶表示装置が点灯しなくなる不具合を生じる
恐れがある。For example, when the liquid crystal display device being driven shifts from a high temperature state to a low temperature state, there is a possibility that moisture may condense to cause the electrolytic corrosion reaction and the liquid crystal display device may not turn on.
そこで本発明は電蝕反応を防止し、高信頼性の液晶表
示装置を提供することを目的とする。Therefore, an object of the present invention is to provide a highly reliable liquid crystal display device which prevents an electrolytic corrosion reaction.
課題を解決するための手段 本発明は上記問題点を解決するため、複数の表示用電
極を有しかつこの表示用電極に給電するための複数個の
リード電極が周囲部に設けられた透光性基板の周縁部に
シール樹脂を設けるとともに、このリード電極のシール
樹脂の上に端部が位置するように対向電極基板を配置
し、かつシール樹脂の一部を対向電極基板の端部より外
側にはみ出させて液晶表示パネルを構成し、その液晶表
示パネルのリード電極に熱圧着接続される異方性導電樹
脂を有する接続フィルムを設け、かつその接続フィルム
を異方性導電樹脂が対向電極基板の端部よりはみ出した
シール樹脂とリード電極の境界を被うようにリード電極
とはみ出したシール樹脂と対向電極基板の側面に亘って
熱圧着したものである。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention has a plurality of display electrodes, and a plurality of lead electrodes for supplying power to the display electrodes are provided in a peripheral portion of a light-transmitting member. The sealing resin is provided on the peripheral edge of the flexible substrate, and the counter electrode substrate is arranged so that the end portion is located above the seal resin of the lead electrode, and a part of the seal resin is outside the end portion of the counter electrode substrate. A liquid crystal display panel is formed by protruding the liquid crystal display panel, and a connection film having an anisotropic conductive resin that is thermocompression bonded to the lead electrode of the liquid crystal display panel is provided, and the anisotropic conductive resin is used as the counter electrode substrate. Of the lead electrode and the side surface of the counter electrode substrate are thermocompression bonded so as to cover the boundary between the seal resin and the lead electrode protruding from the end.
作用 本発明は上記構成、即ちはみ出したシール樹脂と熱圧
着された異方性導電樹脂を有する接続フィルムとによ
り、前述の第６図に示すような水分の介在する間隙を完
全になくすことができ、電蝕反応による断線を防止でき
る。Action The present invention can completely eliminate the water-containing gap as shown in FIG. 6 by the above-mentioned constitution, that is, the protruding seal resin and the thermocompression-bonded connection film having the anisotropic conductive resin. It is possible to prevent disconnection due to electrolytic corrosion reaction.
実施例 以下、本発明の一実施例を第１図〜第５図の図面を用
いて説明する。Embodiment An embodiment of the present invention will be described below with reference to the drawings of FIGS.
（実施例１） 第１図は本発明の第１の実施例による液晶表示装置を
示す図である。(Embodiment 1) FIG. 1 is a diagram showing a liquid crystal display device according to a first embodiment of the present invention.
第２図はその液晶表示装置の液晶表示パネルの製造方
法における要部を示す図である。FIG. 2 is a diagram showing a main part in a method of manufacturing a liquid crystal display panel of the liquid crystal display device.
複数の表示用透明電極及びその透明電極に給電するた
めのリード電極13として例えば酸化インジウムと酸化ス
ズの混合物（ITO）が形成されたガラス基板11と、対向
電極14が形成された対向電極基板12には、配向膜15がそ
れぞれ形成されている。ガラス基板11の周縁部上にはシ
ール樹脂16として、例えば熱硬化性エポキシ樹脂を印刷
し、リード電極13のシール樹脂16の上に対向電極基板12
の端部が位置し、シール樹脂16の一部がはみ出すように
組み立て、熱硬化後、液晶17を封入し、液晶表示パネル
を作成した。かかる液晶表示パネルと回路基板18を接続
し、かつリード電極13とはみ出したシール樹脂16′との
境界を被うため、リード電極13と、はみ出したシール樹
脂16′と、対向電極基板12の側面に亘り連続的に異方性
導電樹脂19によって被うように、接続フィルム20を熱圧
着する。なお、接続フィルム20の構造を第３図に示す。As a plurality of transparent electrodes for display and lead electrodes 13 for supplying power to the transparent electrodes, for example, a glass substrate 11 on which a mixture of indium oxide and tin oxide (ITO) is formed, and a counter electrode substrate 12 on which a counter electrode 14 is formed. An alignment film 15 is formed on each of these. A thermosetting epoxy resin, for example, is printed as the sealing resin 16 on the peripheral portion of the glass substrate 11, and the counter electrode substrate 12 is provided on the sealing resin 16 of the lead electrode 13.
Was assembled such that the end portion of was positioned so that a part of the sealing resin 16 protruded, and after thermosetting, the liquid crystal 17 was enclosed to prepare a liquid crystal display panel. Since the liquid crystal display panel and the circuit board 18 are connected to each other and the boundary between the lead electrode 13 and the protruding sealing resin 16 'is covered, the lead electrode 13, the protruding sealing resin 16', and the side surface of the counter electrode substrate 12 are provided. The connection film 20 is thermocompression-bonded so as to be continuously covered with the anisotropic conductive resin 19 over the entire length. The structure of the connection film 20 is shown in FIG.
接続フィルム20は、ポリイミド基材21に銅箔電極22が
パターンニングされ、熱可塑性の飽和ポリエステル樹脂
に粒径約10μのカーボンフィラーを約６重量パーセト添
加した異方性導電樹脂19が約30μコーティングされたも
のである。In the connection film 20, a copper foil electrode 22 is patterned on a polyimide base material 21, and an anisotropic conductive resin 19 obtained by adding about 6 weight parts of carbon filler having a particle size of about 10μ to thermoplastic saturated polyester resin is coated about 30μ. It was done.
この様にして作成した液晶表示装置を40℃90〜95パー
セント相対湿度の環境下で通電試験を実施したところ50
0時間経過しても電蝕反応による断線は全く発生しなか
った。尚、この時の通電方法としては、電蝕反応が最大
となるように隣接するリード電極間に最大の電位差が生
じるようなパターンとした。The liquid crystal display device created in this way was subjected to a current-carrying test in an environment of 40 ° C and 90 to 95% relative humidity.
Even after 0 hour, no wire breakage due to the electrolytic corrosion reaction occurred. The energization method at this time was a pattern in which the maximum potential difference was generated between the adjacent lead electrodes so that the electrolytic corrosion reaction was maximized.
（実施例２） 実施例１においてシール樹脂と異方性導電樹脂材料と
をポリビニルブチラール樹脂（PVB樹脂）の同一材料と
し、熱圧着時に相溶するよう液晶表示装置を作成した。(Example 2) A liquid crystal display device was prepared in the same manner as in Example 1, except that the polyvinyl butyral resin (PVB resin) was used as the sealing resin and the anisotropic conductive resin material, and they were compatible with each other during thermocompression bonding.
この様にして作成した液晶表示装置において、接続フ
ィルム20のピーリング強度を測定したところ（第１図に
示す矢印Ａ方向）、フィルム2cm当り約6Kg以上あった。
剥離の状態を調べると、接続フィルム20の基材であるポ
リイミド基材21と異方性導電樹脂19との境界で剥離して
おり、異方性導電樹脂19は、液晶表示パネルのリード電
極13と、はみ出したシール樹脂16′と対向電極基板12に
強固に接着され残っていた。このことは、電蝕反応防止
のために非常に好ましい。かかる液晶表示装置を前述の
ような環境試験を実施したところ、実施例１と同様に電
蝕反応による断線は全く発生しなかった。When the peeling strength of the connection film 20 in the liquid crystal display device thus manufactured was measured (the direction of arrow A shown in FIG. 1), it was about 6 kg or more per 2 cm of the film.
When the state of peeling is examined, it is peeled at the boundary between the polyimide base material 21 which is the base material of the connection film 20 and the anisotropic conductive resin 19, and the anisotropic conductive resin 19 is the lead electrode 13 of the liquid crystal display panel. Then, the protruding sealing resin 16 'and the counter electrode substrate 12 were firmly adhered and remained. This is very preferable for preventing electrolytic corrosion reaction. When such a liquid crystal display device was subjected to the environmental test as described above, no wire breakage due to the electrolytic corrosion reaction occurred at all, as in Example 1.
（実施例３） 第４図は本発明の第２の実施例による液晶表示装置の
断面図である。(Embodiment 3) FIG. 4 is a sectional view of a liquid crystal display device according to a second embodiment of the present invention.
第５図はその液晶表示装置の液晶表示パネルの製造方
法における要部を示す図である。FIG. 5 is a diagram showing a main part in a method of manufacturing a liquid crystal display panel of the liquid crystal display device.
複数の表示用透明電極及び給電するためのリード電極
13として、例えば酸化インジウムと酸化スズの混合物
（ITO）が形成されたガラス基板11と、対向電極14が形
成された対向電極基板12には、配向膜15がそれぞれ形成
されている。ガラス基板11上には樹脂濃度14.5wtパーセ
ントのポリイミド溶液を印刷し、熱硬化後、ポリイミド
樹脂薄膜23を約１μ形成した。次に、このポリイミド樹
脂薄膜23上にシール樹脂16として、例えば熱硬化性エポ
キシ樹脂を印刷し、リード電極13のシール樹脂16の上に
対向電極基板12の端部が位置し、シール樹脂16の一部が
はみ出すように組み立て、熱硬化後、液晶17を封入し液
晶表示パネルを作成した。その他は、実施例１と同様な
構造とした。Transparent electrodes for display and lead electrodes for supplying power
As 13, for example, an alignment film 15 is formed on a glass substrate 11 on which a mixture of indium oxide and tin oxide (ITO) is formed and on a counter electrode substrate 12 on which a counter electrode 14 is formed. A polyimide solution having a resin concentration of 14.5 wt% was printed on the glass substrate 11, and after heat curing, a polyimide resin thin film 23 of about 1 μm was formed. Next, as the sealing resin 16 on the polyimide resin thin film 23, for example, a thermosetting epoxy resin is printed, and the end portion of the counter electrode substrate 12 is located on the sealing resin 16 of the lead electrode 13, and the sealing resin 16 After assembling so that part of it protruded, and after thermosetting, the liquid crystal 17 was enclosed to form a liquid crystal display panel. Otherwise, the structure was the same as in Example 1.
この様にして作成した液晶表示装置を40℃、90〜95パ
ーセント相対湿度の環境下で通電試験を実施したところ
500時間経過しても電蝕反応による断線は全く発生しな
かった。尚、この時の通電方法としては、電蝕反応が最
大となるよう、隣接するリード電極間に最大の電位差が
生じるようなパターンとした。The liquid crystal display device created in this way was subjected to a current-carrying test in an environment of 40 ° C and 90 to 95% relative humidity.
Even after 500 hours, no disconnection due to the electrolytic corrosion reaction occurred. The energizing method at this time was a pattern in which the maximum potential difference was generated between the adjacent lead electrodes so that the electrolytic corrosion reaction was maximized.
また、実施例３においてポリイミド溶液を希釈し配向
膜15とポリイミド樹脂薄膜23を同時に形成し、液晶表示
装置を試作した。そのときのポリイミド樹脂薄膜23の膜
厚は約0.15μであった。Further, in Example 3, the polyimide solution was diluted to form the alignment film 15 and the polyimide resin thin film 23 at the same time, and a liquid crystal display device was produced as a prototype. At that time, the thickness of the polyimide resin thin film 23 was about 0.15μ.
この様にして作成した液晶表示装置について実施例３
同様の環境試験を行ったところ、僅かではあるが、点灯
しない状態が生じた。Example 3 of the liquid crystal display device thus produced
When the same environmental test was conducted, a slight non-lighting condition occurred.
また、実施例３において高濃度のポリイミド溶液を印
刷し、ポリイミド樹脂薄膜の膜厚が約３μの液晶表示装
置を作成したがガラス基板上の３μの凸起のためギャッ
プが均一とならなかった。In Example 3, a high-concentration polyimide solution was printed to prepare a liquid crystal display device in which the thickness of the polyimide resin thin film was about 3μ, but the gap was not uniform due to the protrusion of 3μ on the glass substrate.
上述より明らかなように、ポリイミド樹脂薄膜は0.5
μより薄いと電蝕反応防止効果が乏しく、また２μより
厚いとギャップコントロールが難しく、その最適範囲は
0.5〜２μであり、好ましくは約１μである。As is clear from the above, the polyimide resin thin film is 0.5
If it is thinner than μ, the electrolytic corrosion reaction prevention effect is poor, and if it is thicker than 2 μ, it is difficult to control the gap.
It is 0.5 to 2 μ, preferably about 1 μ.
（実施例４） 実施例３においてシール樹脂と異方性導電樹脂材料を
ポリビニルブチラール樹脂（PVB樹脂）同一材料とし熱
圧着時に相溶するよう液晶表示装置を作成した。(Example 4) In Example 3, a liquid crystal display device was prepared in which the polyvinyl butyral resin (PVB resin) was the same material as the sealing resin and the anisotropic conductive resin material, and they were compatible with each other during thermocompression bonding.
この様にして作成した液晶表示装置において、接続フ
ィルム20のピーリング強度を測定したところ（第４図に
示す矢印Ａ方向）フィルム2cm当り約6Kg以上あった。剥
離の状態を調べると接続フィルム20の基材であるポリイ
ミド基材21と異方性導電樹脂19との境界で剥離してお
り、異方性導電樹脂19は、液晶表示パネルのリード電極
13とはみ出したシール樹脂16′と対向電極基板12に強固
に接着され残っていた。このことは、電蝕反応防止のた
めに非常に好ましい。かかる液晶表示装置を前述のごと
き環境試験を実施したところ実施例３同様に電蝕反応に
よる断線は全く発生しなかった。When the peeling strength of the connection film 20 in the liquid crystal display device thus manufactured was measured (direction of arrow A shown in FIG. 4), it was about 6 kg or more per 2 cm of the film. When the peeled state is examined, it is peeled at the boundary between the polyimide base material 21 which is the base material of the connection film 20 and the anisotropic conductive resin 19, and the anisotropic conductive resin 19 is the lead electrode of the liquid crystal display panel.
The seal resin 16 ′ protruding from the surface 13 and the counter electrode substrate 12 were firmly adhered and remained. This is very preferable for preventing electrolytic corrosion reaction. When the liquid crystal display device was subjected to the environmental test as described above, no wire breakage due to the electrolytic corrosion reaction occurred at all, as in Example 3.
ここで、本発明は上記実施例に限定されるものではな
く、基板としては、ガラス，プラスチックフィルム，偏
光機能をもったフィルム,RGB等カラーフィルターが形成
されたガラス或はプラスチックフィルム等の透光性基板
であればよい。Here, the present invention is not limited to the above-mentioned embodiment, and the substrate is a light-transmitting material such as glass, a plastic film, a film having a polarization function, a glass having a color filter such as RGB, or a plastic film. It is sufficient if it is a flexible substrate.
シール樹脂は、エポキシ系，ウレタン系，シリコン
系，アクリル系等の有機樹脂であってもよい。The seal resin may be an organic resin such as an epoxy resin, a urethane resin, a silicon resin, or an acrylic resin.
発明の効果 以上のように、本発明は、液晶表示パネルと接続フィ
ルムの接続近傍において水分の介在する間隙をなくし、
電蝕反応によるリード電極の断線を防止した高信頼性の
液晶表示装置を提供することができるという産業上極め
て有用なものである。Effects of the Invention As described above, the present invention eliminates the gap in which water is present in the vicinity of the connection between the liquid crystal display panel and the connection film,
The liquid crystal display device of high reliability in which the breakage of the lead electrode due to the electrolytic corrosion reaction is prevented can be provided, which is extremely useful in industry.
第１図は本発明の一実施例の液晶表示装置の拡大断面
図、第２図a,bは同液晶表示パネルの製造方法の要部を
示す平面図及び断面図、第３図は本発明にかかる液晶表
示装置に用いる接続フィルムの断面図、第４図は本発明
の他の実施例による液晶表示装置の拡大断面図、第５図
a,bは同液晶表示パネルの製造方法の要部を示す平面図
及び断面図、第６図は従来の液晶表示装置を示す拡大断
面図である。 11……ガラス基板、12……対向電極基板、13……リード
電極、14……対向電極、16……シール樹脂、16′……は
み出したシール樹脂、17……液晶、18……回路基板、19
……異方性導電樹脂、20……接続フィルム。FIG. 1 is an enlarged sectional view of a liquid crystal display device according to an embodiment of the present invention, FIGS. 2a and 2b are a plan view and a sectional view showing an essential part of a method for manufacturing the same liquid crystal display panel, and FIG. FIG. 5 is a sectional view of a connection film used in the liquid crystal display device according to the present invention, FIG. 4 is an enlarged sectional view of a liquid crystal display device according to another embodiment of the present invention, and FIG.
a and b are a plan view and a sectional view showing an essential part of the method for manufacturing the liquid crystal display panel, and FIG. 6 is an enlarged sectional view showing a conventional liquid crystal display device. 11 …… Glass substrate, 12 …… Counter electrode substrate, 13 …… Lead electrode, 14 …… Counter electrode, 16 …… Seal resin, 16 ′ …… Overhanging seal resin, 17 …… Liquid crystal, 18 …… Circuit board , 19
…… Anisotropic conductive resin, 20 …… Connecting film.
Claims (4)
極に給電するための複数個のリード電極が周囲部に設け
られた透光性基板の周縁部にシール樹脂を設けるととも
に、そのシール樹脂の上に端部が位置するように対向電
極基板を配置し、かつシール樹脂の一部を対向電極基板
の端部より外側にはみ出させて液晶表示パネルを構成
し、その液晶表示パネルのリード電極に熱圧着接続され
る異方性導電樹脂を有する接続フィルムを設け、かつそ
の接続フィルムを前記異方性導電樹脂が前記対向電極基
板の端部よりはみ出したシール樹脂とリード電極の境界
を被うように前記リード電極とはみ出したシール樹脂と
対向電極基板の側面に亘って熱圧着したことを特徴とす
る液晶表示装置。1. A sealing resin is provided on a peripheral portion of a light-transmissive substrate having a plurality of display electrodes and a plurality of lead electrodes for supplying power to the display electrodes, the sealing resin being provided on the periphery of the transparent substrate. The counter electrode substrate is arranged so that the end portion is located on the seal resin, and a part of the seal resin is protruded outside the end portion of the counter electrode substrate to form a liquid crystal display panel. A connection film having an anisotropic conductive resin that is thermocompression-bonded to the lead electrode is provided, and the connection film is formed on the boundary between the seal resin and the lead electrode where the anisotropic conductive resin protrudes from the end of the counter electrode substrate. A liquid crystal display device, characterized in that a sealing resin protruding from the lead electrode and a side surface of the counter electrode substrate are thermocompression bonded so as to cover the lead electrode.
た請求項１記載の液晶表示装置。2. The liquid crystal display device according to claim 1, wherein the seal resin and the anisotropic conductive resin are compatible with each other.
リイミド樹脂薄膜を形成した請求項１記載の液晶表示装
置。3. The liquid crystal display device according to claim 1, wherein a polyimide resin thin film is formed on the lead electrode provided with the seal resin.
した請求項３記載の液晶表示装置。4. The liquid crystal display device according to claim 3, wherein the polyimide resin thin film has a thickness of 0.5 to 2.0 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6103388A JP2532563B2 (en) | 1988-03-15 | 1988-03-15 | Liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6103388A JP2532563B2 (en) | 1988-03-15 | 1988-03-15 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01233424A JPH01233424A (en) | 1989-09-19 |
| JP2532563B2 true JP2532563B2 (en) | 1996-09-11 |
Family
ID=13159567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6103388A Expired - Fee Related JP2532563B2 (en) | 1988-03-15 | 1988-03-15 | Liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2532563B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5941874B2 (en) * | 2013-06-25 | 2016-06-29 | 京セラドキュメントソリューションズ株式会社 | Sheet size detection apparatus, sheet feeding apparatus including the same, and image forming apparatus |
-
1988
- 1988-03-15 JP JP6103388A patent/JP2532563B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01233424A (en) | 1989-09-19 |
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