JPH05143219A - Transparent input panel - Google Patents
Transparent input panelInfo
- Publication number
- JPH05143219A JPH05143219A JP30337891A JP30337891A JPH05143219A JP H05143219 A JPH05143219 A JP H05143219A JP 30337891 A JP30337891 A JP 30337891A JP 30337891 A JP30337891 A JP 30337891A JP H05143219 A JPH05143219 A JP H05143219A
- Authority
- JP
- Japan
- Prior art keywords
- transparent
- pressure
- rubber sheet
- input panel
- films
- 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.)
- Withdrawn
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は例えばぺン入力装置等と
して使用される透明入力パネルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transparent input panel used as a pen input device or the like.
【０００２】[0002]
【従来の技術】近年、ＣＲＴプレイや液晶ディスプレイ
等の画面上で入力ペンを使用して入力を行うことのでき
るペン入力装置が脚光を浴びている。このようなペン入
力装置はディスプレイ画面に重ねて置くことのできる透
明入力パネルを含み、入力ペンがこの透明入力パネルを
押すと入力ペンが押した点を特定できるようになってい
る。2. Description of the Related Art In recent years, a pen input device capable of inputting with an input pen on a screen such as a CRT play or a liquid crystal display has been highlighted. Such a pen input device includes a transparent input panel that can be placed over the display screen, and when the input pen pushes the transparent input panel, the point touched by the input pen can be specified.
【０００３】従来の透明入力パネルは、抵抗膜式、静電
容量式、静電結合式、電磁誘導式等がある。この中で、
抵抗膜式のペン入力装置が、コードレスペン化可能、電
池駆動可能、周辺サイズ小化、分解能良好、応答速度
大、等の要求を満足するものとして期待されている。従
来の抵抗膜式透明入力パネルは、第８に示されるよう
に、２枚の透明導電膜１，２を対向させて、その間に透
明樹脂からなるマトリクス状のスペーサ３をドット状に
配置した構成となっている。入力ペン４が所望の位置を
押すと、押された透明導電膜１がスペーサ３のドットと
ドットの間の空間内へ変形し、下側の透明導電膜に接触
する。この時、予め一方の透明導電膜（１）の両端（Ｘ
方向）に一定電圧を印加しておくと、他方の透明導電膜
（２）で接触した地点と透明導電膜（１）の間の電圧を
測定することによって押されて接触したＸ方向の位置を
特定できるようになっている。Conventional transparent input panels include resistance film type, electrostatic capacitance type, electrostatic coupling type, electromagnetic induction type and the like. In this,
A resistance film type pen input device is expected to satisfy requirements such as a cordless pen, battery drive, small peripheral size, good resolution, and high response speed. In the conventional resistive film type transparent input panel, as shown in eighth, two transparent conductive films 1 and 2 are opposed to each other, and matrix-like spacers 3 made of transparent resin are arranged in a dot pattern therebetween. Has become. When the input pen 4 pushes a desired position, the pushed transparent conductive film 1 is transformed into the space between the dots of the spacer 3 and comes into contact with the lower transparent conductive film. At this time, both ends of one transparent conductive film (1) (X
Direction), a voltage is applied between the transparent conductive film (1) and the contact point of the other transparent conductive film (2) to measure the position of the pressed and contacted X direction. It can be identified.
【０００４】[0004]
【発明が解決しようとする課題】従来の抵抗膜式透明入
力パネルでは、透明導電膜１，２のいずれかにマトリク
ス状のスペーサ３をドット状に形成しなければならな
い。スペーサ３の形成は、印刷又は、フォトリソグラフ
等により行われていた。印刷は、スクリーン、グラビ
ア、平版、フレキソ等、種々の方法があった。しかし、
いずれの場合にも、スペーサ３を形成するために複雑な
工程が必要であった。例えば、印刷の場合には、ドット
パターン原稿作成、印刷版作成、印刷、乾燥（硬化）等
の工程が必要である。またフォトリソグラフの場合に
は、マスクパターン作成、感光性樹脂塗布、パターン露
光、洗浄工程が必要である。さらに、形成したスペーサ
３は、微小な間隔で所定のピッチで並んでいなければな
らず、密着性、耐久性等を必要とされるが、長期使用
や、連続使用により、一部が剥離したり、欠けるなどの
問題があった。In the conventional resistance film type transparent input panel, the matrix-shaped spacers 3 must be formed in a dot shape on either of the transparent conductive films 1 and 2. The spacers 3 have been formed by printing, photolithography or the like. There were various methods of printing such as screen, gravure, lithographic, flexographic and the like. But,
In any case, a complicated process was required to form the spacer 3. For example, in the case of printing, steps such as dot pattern document creation, printing plate creation, printing, and drying (curing) are required. Further, in the case of photolithography, mask pattern formation, photosensitive resin application, pattern exposure, and cleaning steps are required. Further, the formed spacers 3 must be lined up at a predetermined pitch with a minute interval and are required to have adhesiveness, durability, etc., but partly peeled off due to long-term use or continuous use. There was a problem such as, or missing.
【０００５】本発明の目的は、複雑な工程によらなくて
も製造でき、かつ耐久性に優れた透明入力パネルを提供
することである。An object of the present invention is to provide a transparent input panel which can be manufactured without a complicated process and has excellent durability.
【０００６】[0006]
【課題を解決するための手段】本発明による透明入力パ
ネルは、対向する第１及び第２の透明導電膜と、該第１
及び第２の透明導電膜の間に挿入された透明な感圧導電
ゴムシートとからなることを特徴とする。A transparent input panel according to the present invention includes first and second transparent conductive films which face each other.
And a transparent pressure-sensitive conductive rubber sheet inserted between the second transparent conductive film and the second transparent conductive film.
【０００７】[0007]
【作用】上記構成においては、感圧導電ゴムシートは通
常は絶縁物と同等の抵抗（例えば、１０7 Ω・cm以上）
をもち、加圧時（例えば０．１〜０．５kg／cm2 ）には
導電性（例えば、１０4 Ω・cm以下）を示す。透明入力
パネルを入力ペンで押すと、感圧導電ゴムシートが圧縮
されてその中の導電性物質が互いに接近し、導電率が大
きくなり、第１及び第２の透明導電膜を導通させるよう
になる。よって第１及び第２の透明導電膜の抵抗値を測
定することによって押された位置を特定できる。In the above structure, the pressure-sensitive conductive rubber sheet usually has a resistance equivalent to that of an insulator (for example, 10 7 Ω · cm or more).
It exhibits electrical conductivity (for example, 10 4 Ω · cm or less) when pressurized (for example, 0.1 to 0.5 kg / cm 2 ). When the transparent input panel is pressed with the input pen, the pressure-sensitive conductive rubber sheet is compressed and the conductive substances therein approach each other, the conductivity increases, and the first and second transparent conductive films are made conductive. Become. Therefore, the pressed position can be specified by measuring the resistance values of the first and second transparent conductive films.
【０００８】[0008]
【実施例】図１は本発明の原理図兼実施例を示す図であ
る。透明入力パネル１０は、対向する第１及び第２の透
明導電膜１２，１４と、該第１及び第２の透明導電膜１
２，１４の間に挿入された透明な感圧導電ゴムシート１
６とからなる。第１及び第２の透明導電膜１２，１４は
例えば厚さ７５μｍのポリエステルフィルム１８，２０
の表面に付着されたインジウムスズ酸化物（ＩＴＯ）の
ベタ膜からなり、例えば表面抵抗は２００Ω／□であ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing the principle and embodiment of the present invention. The transparent input panel 10 includes first and second transparent conductive films 12 and 14 facing each other and the first and second transparent conductive films 1 and 2.
Transparent pressure-sensitive conductive rubber sheet 1 inserted between 2 and 14
It consists of 6 and 6. The first and second transparent conductive films 12 and 14 are, for example, polyester films 18 and 20 having a thickness of 75 μm.
It is made of a solid film of indium tin oxide (ITO) attached to the surface of, and has a surface resistance of 200Ω / □, for example.
【０００９】図１及び図４に示されるように、感圧導電
ゴムシート１６はシリコンゴム２２のプレポリマーと粒
径５０μｍ以下のＩＴＯの微細片２４とを混合し、シー
ト状に注型したものである。この感圧導電ゴムシート１
６は透明であり、無加圧時の抵抗は１０11Ω・cmのオー
ダーであり、加圧時（０．１〜０．５kg／cm2 ）の抵抗
は１０2 Ω・cmオーダーであった。すなわち、感圧導電
ゴムシート１６は通常は絶縁性であり、加圧すると導電
性になる。As shown in FIGS. 1 and 4, the pressure-sensitive conductive rubber sheet 16 is obtained by mixing a prepolymer of a silicone rubber 22 and a fine piece 24 of ITO having a particle size of 50 μm or less and casting it in a sheet form. Is. This pressure-sensitive conductive rubber sheet 1
No. 6 was transparent, and the resistance without pressure was on the order of 10 11 Ω · cm, and the resistance with pressure (0.1 to 0.5 kg / cm 2 ) was on the order of 10 2 Ω · cm. .. That is, the pressure-sensitive conductive rubber sheet 16 is normally insulative, and becomes conductive when pressed.
【００１０】図４に示されるように、感圧導電ゴムシー
ト１６の中のＩＴＯの微細片２４はばらばらに分散して
いるので互いの接触は弱く、通常は絶縁性を示すのであ
る。図４に示されるように、感圧導電ゴムシート１６を
加圧すると、感圧導電ゴムシート１６が圧縮されてその
中のＩＴＯの微細片２４が互いに接近して接触が強くな
り、感圧導電ゴムシート１６の上下面間の導電率が大き
くなる。As shown in FIG. 4, since the ITO fine pieces 24 in the pressure-sensitive conductive rubber sheet 16 are dispersed in a scattered manner, they are weakly in contact with each other and normally exhibit insulating properties. As shown in FIG. 4, when the pressure-sensitive conductive rubber sheet 16 is pressed, the pressure-sensitive conductive rubber sheet 16 is compressed and the ITO fine pieces 24 therein approach each other to strengthen the contact, resulting in the pressure-sensitive conductive rubber sheet. The conductivity between the upper and lower surfaces of the rubber sheet 16 is increased.
【００１１】図４には感圧導電ゴムシート１６が入力ペ
ン２６で直接に加圧されるように示されているが、実際
には入力ペン２６は図１の透明入力パネル１０のポリエ
ステルフィルム１８及び第１の透明導電膜１２を介して
感圧導電ゴムシート１６を加圧する。第１の透明導電膜
１２は電源の一端子側に接続される電極２８（図２）を
有し、第２の透明導電膜１４は電源の他端子側に接続さ
れる電極３０（図２）を有する。感圧導電ゴムシート１
６が加圧されなくて高い抵抗を示す状態のときには、第
１及び第２の透明導電膜１２，１４の間は実質的に導通
しない。感圧導電ゴムシート１６が加圧されて導電性を
示すようになると、第１及び第２の透明導電膜１２，１
４の間が感圧導電ゴムシート１６を介して導通するよう
になる。Although FIG. 4 shows that the pressure-sensitive conductive rubber sheet 16 is directly pressed by the input pen 26, the input pen 26 is actually the polyester film 18 of the transparent input panel 10 of FIG. And, the pressure-sensitive conductive rubber sheet 16 is pressed through the first transparent conductive film 12. The first transparent conductive film 12 has an electrode 28 (FIG. 2) connected to one terminal side of the power source, and the second transparent conductive film 14 is an electrode 30 (FIG. 2) connected to the other terminal side of the power source. Have. Pressure-sensitive conductive rubber sheet 1
When 6 is not pressed and exhibits a high resistance, the first and second transparent conductive films 12 and 14 do not substantially conduct. When the pressure-sensitive conductive rubber sheet 16 is pressed and becomes conductive, the first and second transparent conductive films 12, 1
4, the pressure-sensitive conductive rubber sheet 16 is electrically connected.
【００１２】図２は、本発明の透明入力パネルの測定原
理図である。上側の透明導電膜１２（Ｘ軸）の両端には
一対の電極２８が設けられ、下側の透明導電膜３０（Ｙ
軸）の両端（９０°回転した方向）には一対の電極３０
が設けられる。両導電膜１２，１４の間に透明な感圧導
電ゴムシート１６が設けられる。各対の電極２８，３０
間には一定電圧ＶｖｏｌｔをスイッチＸ1 ，Ｘ2(Ｙ1 ，
Ｙ2)を介して印加出来るようになっている。また、スイ
ッチＸ2 ，Ｙ2 と平列に電圧計Ｖy ，Ｙx が配置され
る。今、入力ペン２６が点Ａで示す位置に当てられたと
すると、点Ａのｘ方向の位置Ｌx は次のようにして求め
られる。即ち、図３も同時に参照すると、スイッチ
Ｘ1 ，Ｘ2 を閉じ、Ｙ1 ，Ｙ2 を開けると、Ｘ軸透明導
電膜１２の電極２８間にＶ0 ボルトの電圧が印加され
る。点Ａは感圧導電ゴムシート１６を介して下側のＹ軸
透明導電膜３０と接触しているので、電圧計Ｖx によ
り、Ｙ軸の透明導電膜１４側からＸ軸の片側の電極２８
と点Ａ間の電圧を測定する事により、図３（Ｂ）に示す
距離と電圧の比例関係からＬx を求める事が出来る。Ｌ
y についてはこれと全く逆にして求めることが出来る。FIG. 2 is a diagram showing the measurement principle of the transparent input panel of the present invention. A pair of electrodes 28 are provided at both ends of the upper transparent conductive film 12 (X axis), and the lower transparent conductive film 30 (Y
A pair of electrodes 30 is provided on both ends of the shaft (direction rotated by 90 °).
Is provided. A transparent pressure-sensitive conductive rubber sheet 16 is provided between the conductive films 12 and 14. Each pair of electrodes 28, 30
A constant voltage Vvolt is applied between the switches X 1 , X 2 (Y 1 ,
Y 2 ) can be applied. Further, voltmeters V y and Y x are arranged in parallel with the switches X 2 and Y 2 . Now, assuming that the input pen 26 is applied to the position indicated by the point A, the position L x of the point A in the x direction is obtained as follows. That is, referring also to FIG. 3, when the switches X 1 and X 2 are closed and Y 1 and Y 2 are opened, a voltage of V 0 volt is applied between the electrodes 28 of the X-axis transparent conductive film 12. Since the point A is in contact with the lower Y-axis transparent conductive film 30 via the pressure-sensitive conductive rubber sheet 16, the voltmeter V x allows the electrode 28 from the Y-axis transparent conductive film 14 side to the X-axis one side.
By measuring the voltage between the point A and the point A, L x can be obtained from the proportional relationship between the distance and the voltage shown in FIG. L
y can be obtained by reversing this.
【００１３】この透明入力パネル１０のテストの結果で
は、極めて良好な応答特性を示し、リニアリティがよ
く、分解能も優れていた。ただし、分解能は入力ペン２
６の先端の丸みの程度に依存するが、少なくとも従来の
ものと同程度の分解能を得ることができる。なお、感圧
導電ゴムシート１６は従来のマトリクス状のスペーサの
ように小片に分割されたものでないので、製造上の複雑
さもなく、耐久性も優れている。As a result of the test of this transparent input panel 10, it showed extremely good response characteristics, good linearity and excellent resolution. However, the resolution is input pen 2
Although it depends on the degree of roundness of the tip of No. 6, at least the same resolution as the conventional one can be obtained. Since the pressure-sensitive conductive rubber sheet 16 is not divided into small pieces like the conventional matrix-shaped spacers, there is no manufacturing complexity and the durability is excellent.
【００１４】図５及び図６は感圧導電ゴムシート１６の
別の実施例を示す図である。感圧導電ゴムシート１６は
シリコンゴム２２の中にＩＴＯの微細片２４を混入した
ものであるが、ＩＴＯの微細片２４を微粒子状に形成す
るのが難しい場合には，薄膜状に形成するのがよい。こ
の場合、ＩＴＯの薄膜状の微細片２４を微小な担体３２
の表面に付加して形成すると、そのようなＩＴＯの薄膜
状の微細片２４を比較的簡単に製造可能である。微小担
体３２としては、シリカ粉末、雲母、合成樹脂粉末など
が用いられる。FIGS. 5 and 6 are views showing another embodiment of the pressure-sensitive conductive rubber sheet 16. The pressure-sensitive conductive rubber sheet 16 is made by mixing the ITO fine pieces 24 in the silicon rubber 22. However, when it is difficult to form the ITO fine pieces 24 in the form of fine particles, they are formed in a thin film shape. Is good. In this case, the ITO thin film-shaped fine piece 24 is attached to the fine carrier 32.
When it is formed by being added to the surface of, the thin film-shaped fine pieces 24 of ITO can be manufactured relatively easily. As the fine carrier 32, silica powder, mica, synthetic resin powder or the like is used.
【００１５】図５は、ＩＴＯの薄膜状の微細片２４が透
明な有機又は無機材料からなる微粒子３２の表面を被覆
して形成された例を示している。図６は、ＩＴＯの薄膜
状の微細片２４が透明な繊維３４の表面を被覆して形成
された例を示している。透明な繊維３４としては、超極
細ポリエステル繊維（太さ２μｍ）などが用いられる。FIG. 5 shows an example in which a thin film-shaped fine piece 24 of ITO is formed by coating the surface of fine particles 32 made of a transparent organic or inorganic material. FIG. 6 shows an example in which a thin film-shaped fine piece 24 of ITO is formed by covering the surface of the transparent fiber 34. As the transparent fiber 34, ultrafine polyester fiber (thickness 2 μm) or the like is used.
【００１６】図７は感圧導電ゴムシートの別の実施例を
示す図である。この感圧導電ゴムシート４０は透明な第
１層４２及び第２層４４からなる。第１層４２及び第２
層４４の各層は、感圧導電微小帯片４６と絶縁帯片４８
とを交互に積層した積層体からなる。この感圧導電微小
帯片４６は上記した感圧導電ゴムシート１６と同様にシ
リコンゴム２２の中にＩＴＯの微細片２４を混入して形
成されたものをスライスした形体である。各感圧導電微
小帯片４６は感圧導電ゴムシート４０の膜厚方向、すな
わち感圧導電ゴムシート４０の表面に垂直な方向に立て
て配列してあり、配列が第１層４２と第２層４４とで９
０度ずらしてある。従って、この感圧導電ゴムシート４
０は加圧時に膜厚方向にのみ特異的に導電性を示すよう
にしてある。FIG. 7 is a view showing another embodiment of the pressure-sensitive conductive rubber sheet. The pressure-sensitive conductive rubber sheet 40 comprises a transparent first layer 42 and a transparent second layer 44. First layer 42 and second
Each layer of layer 44 includes a pressure sensitive conductive micro-strip 46 and an insulating strip 48.
It is composed of a laminated body in which and are alternately laminated. This pressure-sensitive conductive micro strip 46 is a shape obtained by slicing one formed by mixing the ITO micro-fragment 24 in the silicon rubber 22 similarly to the pressure-sensitive conductive rubber sheet 16 described above. The pressure-sensitive conductive micro strips 46 are arranged upright in the film thickness direction of the pressure-sensitive conductive rubber sheet 40, that is, in a direction perpendicular to the surface of the pressure-sensitive conductive rubber sheet 40, and arranged in the first layer 42 and the second layer. Layers 44 and 9
It is offset by 0 degrees. Therefore, this pressure-sensitive conductive rubber sheet 4
0 is designed to show specific conductivity only in the film thickness direction when pressure is applied.
【００１７】[0017]
【発明の効果】以上説明したように、本発明によれば、
透明な感圧導電ゴムシートを用いることにより、従来の
スペーサのようにドットの形成が必要でなくなり、従っ
てドットの形成に必要な手間がかからなくなる。この感
圧導電性ゴムシートは平坦なものであり、従来のドット
のように剥離したり、欠けたりすることがなくなる。As described above, according to the present invention,
By using the transparent pressure-sensitive conductive rubber sheet, it is not necessary to form dots unlike the conventional spacers, and thus the labor required for dot formation is eliminated. This pressure-sensitive conductive rubber sheet is flat and does not peel off or chip like a conventional dot.
【図１】本発明の原理図である。FIG. 1 is a principle diagram of the present invention.
【図２】測定原理を示す図である。FIG. 2 is a diagram showing a measurement principle.
【図３】測定原理図を示す図であり、（Ａ）は図２の簡
略図、（Ｂ）は測定原理と電圧との関係を示す図であ
る。3A and 3B are diagrams showing a measurement principle, FIG. 3A is a simplified diagram of FIG. 2, and FIG. 3B is a diagram showing a relationship between the measurement principle and voltage.
【図４】感圧導電ゴムシートを示す図であり、（Ａ）は
感圧導電ゴムシートの断面図、（Ｂ）は感圧導電ゴムシ
ートの加圧状態を示す図である。4A and 4B are views showing a pressure-sensitive conductive rubber sheet, FIG. 4A is a cross-sectional view of the pressure-sensitive conductive rubber sheet, and FIG. 4B is a view showing a pressed state of the pressure-sensitive conductive rubber sheet.
【図５】感圧導電ゴムシートの別の実施例を示す図であ
る。FIG. 5 is a diagram showing another example of the pressure-sensitive conductive rubber sheet.
【図６】感圧導電ゴムシートの別の実施例を示す図であ
る。FIG. 6 is a diagram showing another example of the pressure-sensitive conductive rubber sheet.
【図７】感圧導電ゴムシートの別の実施例を示す図であ
る。FIG. 7 is a diagram showing another embodiment of the pressure-sensitive conductive rubber sheet.
【図８】従来技術を示す図である。FIG. 8 is a diagram showing a conventional technique.
１２，１４…透明導電膜 １６…感圧導電ゴムシート ２４…ＩＴＯの微細片 ４０…感圧導電ゴムシート ４６…感圧導電微小帯片 ４８…絶縁帯片 12, 14 ... Transparent conductive film 16 ... Pressure-sensitive conductive rubber sheet 24 ... ITO fine piece 40 ... Pressure-sensitive conductive rubber sheet 46 ... Pressure-sensitive conductive minute strip 48 ... Insulating strip
Claims (5)
２，１４）と、該第１及び第２の透明導電膜の間に挿入
された透明な感圧導電ゴムシート（１６）とからなるこ
とを特徴とする透明入力パネル。1. A first and a second transparent conductive film (1) facing each other.
2, 14) and a transparent pressure-sensitive conductive rubber sheet (16) inserted between the first and second transparent conductive films, which is a transparent input panel.
縁性ゴム中にインジウムスズ酸化物（ＩＴＯ）の微細片
（２４）を混入した構成のものであることを特徴とする
請求項１に記載の透明入力パネル2. The pressure-sensitive conductive rubber sheet (16) has a structure in which fine particles (24) of indium tin oxide (ITO) are mixed in an electrically insulating rubber. Transparent input panel described in
ウムスズ酸化物の微細片（２４）が、薄膜状に形成され
たものであることを特徴とする請求項２に記載の透明入
力パネル。3. The transparent input panel according to claim 2, wherein the indium tin oxide fine pieces (24) of the pressure-sensitive conductive rubber sheet (16) are formed in a thin film shape. ..
ウムスズ酸化物の微細片（２４）が、微小な担体（３
２，３４）の表面に付加されてなることを特徴とする請
求項２に記載の透明入力パネル。4. The fine particles (24) of indium tin oxide of the pressure-sensitive conductive rubber sheet (16) are fine carriers (3).
The transparent input panel according to claim 2, wherein the transparent input panel is added to the surface of the transparent input panel.
導電微小帯片（４６）と絶縁帯片（４８）とを交互に積
層した積層体からなり、加圧時に膜厚方向にのみ特異的
に導電性を示すようにしたことを特徴とする請求項１に
記載の透明入力パネル。5. The pressure-sensitive conductive rubber sheet (40) is composed of a laminated body in which pressure-sensitive conductive minute strips (46) and insulating strips (48) are alternately laminated, and in the film thickness direction during pressurization. The transparent input panel according to claim 1, wherein the transparent input panel has a specific conductivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30337891A JPH05143219A (en) | 1991-11-19 | 1991-11-19 | Transparent input panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30337891A JPH05143219A (en) | 1991-11-19 | 1991-11-19 | Transparent input panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05143219A true JPH05143219A (en) | 1993-06-11 |
Family
ID=17920289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30337891A Withdrawn JPH05143219A (en) | 1991-11-19 | 1991-11-19 | Transparent input panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05143219A (en) |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990204 |