JP5218336B2 - Touch panel and display device using the same - Google Patents

Description

この発明は、抵抗膜式タッチパネルとこれを用いる表示装置に関する。   The present invention relates to a resistive touch panel and a display device using the same.

近年、液晶パネルなどを表示モニターとして備えたモバイル機器は、小型薄型化の要求に対応するため、表示モニターの表示面に入力デバイスとしてのタッチパネルを搭載するものが多くなっている。   In recent years, mobile devices equipped with a liquid crystal panel or the like as a display monitor are increasingly equipped with a touch panel as an input device on the display surface of the display monitor in order to meet the demand for a reduction in size and thickness.

タッチパネルには、静電容量方式や抵抗膜方式、或いは電磁誘導方式等、種々の方式があるが、それらのうちで最も汎用されている抵抗膜式のタッチパネルは、タッチ側とその反対側の一対の基板を所定の間隙を保ち接合してセルを形成し、このセル内の対向する内面それぞれに第１と第２の抵抗膜を設けたものであり、タッチ側基板がその外面側からのタッチ操作により撓み変形し、このタッチ側基板の内面の抵抗膜が局部的に反対側基板の内面の抵抗膜に接触して、第１の抵抗膜と第２の抵抗膜とがタッチ点に対応した部分において局部的に導通する。そして、その局部的導通部の複数方向における電位値からタッチ位置が算出される。   There are various types of touch panels such as a capacitance method, a resistance film method, and an electromagnetic induction method. Among them, the most widely used resistance film type touch panel is a touch side and a pair on the opposite side. A cell is formed by bonding the substrates with a predetermined gap, and first and second resistance films are provided on the opposing inner surfaces of the cell, respectively, and the touch side substrate is touched from the outer surface side. The resistance film on the inner surface of the touch side substrate locally contacts the resistance film on the inner surface of the opposite side substrate, and the first resistance film and the second resistance film correspond to the touch point. Conducted locally in the part. Then, the touch position is calculated from the potential values in the plurality of directions of the local conduction portion.

このような抵抗膜式タッチパネルを表示モニターに搭載した場合、タッチパネルを液晶パネル等の表示パネルに重ねたことによる反射層の増加やタッチパネル自体の歪みによる干渉縞の発生等により表示品位が劣化する。   When such a resistive touch panel is mounted on a display monitor, the display quality deteriorates due to an increase in the reflective layer due to the touch panel overlaid on a display panel such as a liquid crystal panel or the generation of interference fringes due to distortion of the touch panel itself.

従来、タッチパネル付きモニターの表示品位劣化の抑制手法として、タッチパネルのセル内に液体を充填する手法（特許文献１参照）が用いられている。この手法によれば、セルと液体との界面の屈折率の差が、セル内に空気を充填する通常方式の場合におけるセルと空気との界面の屈折率の差よりも小さくなり、その結果、界面での光の反射が抑制され、外光が強くあたる環境などでの視認性が向上する。   Conventionally, as a technique for suppressing display quality deterioration of a monitor with a touch panel, a technique of filling a liquid in a cell of the touch panel (see Patent Document 1) has been used. According to this method, the difference in the refractive index at the interface between the cell and the liquid is smaller than the difference in the refractive index at the interface between the cell and the air in the case of the normal method in which the cell is filled with air. Reflection of light at the interface is suppressed, and visibility in an environment where strong external light is applied is improved.

しかし、液体を充填する方式のタッチパネルでは、液体を漏らさないように完全にセル内に密閉封止する必要がある。液体が密閉封止されていると、セルを押圧した際の反発力が、セル内に空気を充填しただけで密閉していない通常の非密閉式空気セルの場合に比べて強くなる。その結果、同じ押圧力を非密閉式セルと液体密閉式セルにそれぞれかけた場合、液体密閉式の方が押圧力に対するセルの変形ストロークは小さくなる。この為、液体密閉式タッチパネルにおいて容易にタッチ操作を行うには、非密閉式タッチパネルに比べて対向抵抗膜間距離を狭くする必要がある。   However, a touch panel of a liquid filling method needs to be hermetically sealed in the cell so as not to leak the liquid. When the liquid is hermetically sealed, the repulsive force when the cell is pressed becomes stronger than in the case of a normal non-sealed air cell that is not hermetically sealed simply by filling the cell with air. As a result, when the same pressing force is applied to the non-sealing cell and the liquid sealing cell, the liquid sealing type has a smaller cell deformation stroke with respect to the pressing force. For this reason, in order to easily perform a touch operation on the liquid hermetic touch panel, it is necessary to narrow the distance between the opposing resistance films as compared with the non-hermetic touch panel.

特開昭６１−４５５１９号公報JP 61-45519

液体密閉型タッチパネルにおいては、封入液体が環境温度等の影響を受けて温度変化し、これに伴いセル体積が収縮或いは膨張する。しかるに、抵抗膜方式の液体密閉型タッチパネルでは、上述したように対向抵抗膜間距離を狭くしてある為、低温時にセル内に密封した液体の体積が収縮した場合に、対向抵抗膜同士がタッチ操作とは無関係に接触する誤動作が発生する虞がある。   In a liquid-sealed touch panel, the temperature of the sealed liquid changes under the influence of environmental temperature or the like, and the cell volume contracts or expands accordingly. However, in the resistive film type liquid-sealed touch panel, since the distance between the opposing resistance films is narrowed as described above, the opposing resistance films touch each other when the volume of the liquid sealed in the cell contracts at a low temperature. There is a risk that a malfunction will occur regardless of the operation.

本発明の目的は、環境温度変化による誤動作を確実に防止した抵抗膜方式のタッチパネルとこれを搭載した表示装置を提供することである。   An object of the present invention is to provide a resistive film type touch panel that reliably prevents malfunction due to a change in environmental temperature and a display device equipped with the same.

前記課題を解決するため、本発明のタッチパネルの一態様は、第１の抵抗膜が形成された第１の基板と、前記第１の基板と接合する枠状のシール材を介して前記第１の基板と所定の間隙を保ち、前記第１の抵抗膜と対向するよう配置され、第２の抵抗膜が形成された第２の基板と、前記第１の基板と前記第２の基板との間における前記シール材によって囲まれた領域に封入された液体または液晶と、前記液体または液晶の温度を検出する温度センサと、前記第１の抵抗膜の２点間に第１の電圧を印加し、前記第２の抵抗膜の前記２点間とは異なる方向の２点間に第２の電圧を印加し、前記第１の抵抗膜が前記第２の抵抗膜に接触した位置の前記第１の電圧及び前記第２の電圧のそれぞれの印加方向における電圧値に基づきタッチ位置を検出するタッチ位置検出手段と、前記第１の抵抗膜の２点間に前記第１の電圧よりも高い第３の電圧、或いは前記第２の抵抗膜の２点間に前記第２の電圧よりも高い第４の電圧のうちの少なくとも一方の電圧を印加し、前記第１の抵抗膜或いは前記第２の抵抗膜のうちの少なくとも一方を発熱させ、前記液体または液晶を加熱するタッチパネル加熱手段と、前記温度センサにより検出した前記液体または液晶の温度に応じて、前記タッチ位置検出手段と前記タッチパネル加熱手段とを選択的に切換え、前記液体または液晶の温度を所定温度範囲に制御するタッチパネル駆動制御手段と、を有する、ことを特徴とする。 In order to solve the above-described problem, an embodiment of the touch panel according to the present invention includes a first substrate on which a first resistance film is formed, and a first sealing member that is bonded to the first substrate via a frame-shaped sealing material. the substrate and maintaining a predetermined gap, the disposed first resistive film opposite to the above, a second substrate second resistive film is formed, and the first substrate and the second substrate A first voltage is applied between two points of the liquid or liquid crystal sealed in the region surrounded by the sealing material, a temperature sensor for detecting the temperature of the liquid or liquid crystal, and the first resistance film. The second voltage is applied between two points in a direction different from the two points of the second resistance film, and the first resistance film is in a position where the first resistance film is in contact with the second resistance film . detecting the touch position based on the voltage value in each of the application direction of the voltage and the second voltage A third voltage higher than the first voltage between the two points of the touch position detecting means and the first resistive film, or higher than the second voltage between the two points of the second resistive film. Touch panel heating means for applying at least one voltage of a fourth voltage to generate heat in at least one of the first resistance film or the second resistance film and heating the liquid or liquid crystal; Touch panel drive control means for selectively switching between the touch position detecting means and the touch panel heating means in accordance with the temperature of the liquid or liquid crystal detected by a temperature sensor, and controlling the temperature of the liquid or liquid crystal within a predetermined temperature range; the a, that you characterized.

前記課題を解決するため、本発明のタッチパネル付き表示装置の一態様は、第１の抵抗膜が形成された第１の基板と、前記第１の基板と接合する枠状のシール材を介して前記第１の基板と所定の間隙を保ち、前記第１の抵抗膜と対向するよう配置され、第２の抵抗膜が形成された第２の基板と、前記第１の基板と前記第２の基板との間における前記シール材によって囲まれた領域に封入された液体または液晶と、前記液体または液晶の温度を検出する温度センサと、前記第１の抵抗膜の２点間に第１の電圧を印加し、前記第２の抵抗膜の前記２点間とは異なる方向の２点間に第２の電圧を印加し、前記第１の抵抗膜が前記第２の抵抗膜に接触した位置の前記第１の電圧及び前記第２の電圧のそれぞれの印加方向における電圧値に基づきタッチ位置を検出するタッチ位置検出手段と、前記第１の抵抗膜の２点間に前記第１の電圧よりも高い第３の電圧、或いは前記第２の抵抗膜の２点間に前記第２の電圧よりも高い第４の電圧のうちの少なくとも一方の電圧を印加し、前記第１の抵抗膜或いは前記第２の抵抗膜のうちの少なくとも一方を発熱させ、前記液体または液晶を加熱するタッチパネル加熱手段と、前記温度センサにより検出した前記液体または液晶の温度に応じて、前記タッチ位置検出手段と前記タッチパネル加熱手段とを選択的に切換え、前記液体または液晶の温度を所定温度範囲に制御するタッチパネル駆動制御手段と、を備えるタッチパネルを、表示パネルの表示面に積層し、前記第１の抵抗膜の２点間に前記第１の電圧を印加し、前記第２の抵抗膜の前記２点間とは異なる方向の２点間に前記第２の電圧を印加し、前記第１の基板と前記第２の基板との何れかの基板に外部からタッチ圧力が作用した際の撓み変形により前記第１の抵抗膜と前記第２の抵抗膜とが接触した位置の前記第１の電圧及び前記第２の電圧のそれぞれの印加方向における電圧値に基づきタッチ位置を検出するタッチ位置検出手段と、前記第１の抵抗膜の２点間に前記第１の電圧よりも高い第３の電圧、或いは前記第２の抵抗膜の２点間に前記第２の電圧よりも高い第４の電圧のうちの少なくとも一方の電圧を印加し、前記第１の抵抗膜或いは前記第２の抵抗膜のうちの少なくとも一方を発熱させ、前記液体または液晶を加熱するタッチパネル加熱手段と、前記第１の温度センサにより検出した前記液体または液晶の温度と、前記タッチ位置検出手段による前記第１の電圧及び前記第２の電圧の印加と、前記タッチパネル加熱手段による前記第３の電圧及び／又は前記第４の電圧の印加とを選択的に切換え、前記液体または液晶の温度を適正範囲内に制御するタッチパネル駆動制御手段と、を備える、ことを特徴とする。In order to solve the above problems, an embodiment of a display device with a touch panel according to the present invention includes a first substrate on which a first resistance film is formed, and a frame-shaped sealing material bonded to the first substrate. A second substrate on which a second resistance film is formed, the second substrate being disposed to face the first resistance film while maintaining a predetermined gap with the first substrate, the first substrate, and the second substrate A liquid or liquid crystal sealed in a region surrounded by the sealing material between the substrate, a temperature sensor for detecting the temperature of the liquid or liquid crystal, and a first voltage between two points of the first resistance film. And a second voltage is applied between two points in a direction different from that between the two points of the second resistive film, and the first resistive film is in contact with the second resistive film. Touch based on voltage values in the application directions of the first voltage and the second voltage A touch position detecting means for detecting a position and a second voltage higher than the first voltage between the two points of the first resistive film, or the second voltage between the two points of the second resistive film. Touch panel heating that applies at least one voltage of a fourth voltage higher than the voltage, heats at least one of the first resistance film or the second resistance film, and heats the liquid or liquid crystal And a touch panel that selectively switches between the touch position detecting means and the touch panel heating means according to the temperature of the liquid or liquid crystal detected by the temperature sensor, and controls the temperature of the liquid or liquid crystal within a predetermined temperature range. A touch panel comprising a drive control means, laminated on the display surface of the display panel, applying the first voltage between two points of the first resistive film, and between the two points of the second resistive film What is The second voltage is applied between two points in the direction, and the first substrate is deformed when a touch pressure is applied from the outside to any one of the first substrate and the second substrate. Touch position detecting means for detecting a touch position based on voltage values in the application directions of the first voltage and the second voltage at a position where the resistance film and the second resistance film are in contact with each other; and At least one of a third voltage higher than the first voltage between the two points of the resistive film and a fourth voltage higher than the second voltage between the two points of the second resistive film The touch panel heating means for heating at least one of the first resistance film or the second resistance film to heat the liquid or liquid crystal and the first temperature sensor detected by the first temperature sensor Liquid or liquid crystal temperature and the touch The liquid or liquid crystal is selectively switched between application of the first voltage and the second voltage by the position detection means and application of the third voltage and / or the fourth voltage by the touch panel heating means. Touch panel drive control means for controlling the temperature within a proper range.

前記課題を解決するため、本発明のタッチパネル付き液晶表示装置の一態様は、第１の抵抗膜が形成された第１の基板と、前記第１の基板と接合する枠状のシール材を介して前記第１の基板と所定の間隙を保ち、前記第１の抵抗膜と対向するよう配置され、第２の抵抗膜が形成された第２の基板と、前記第１の基板と前記第２の基板との間における前記シール材によって囲まれた領域に封入された液体または液晶と、前記液体または液晶の温度を検出する第１の温度センサと、前記第１の抵抗膜の２点間に第１の電圧を印加し、前記第２の抵抗膜の前記２点間とは異なる方向の２点間に第２の電圧を印加し、前記第１の抵抗膜が前記第２の抵抗膜に接触した位置の前記第１の電圧及び前記第２の電圧のそれぞれの印加方向における電圧値に基づきタッチ位置を検出するタッチ位置検出手段と、前記第１の抵抗膜の２点間に前記第１の電圧よりも高い第３の電圧、或いは前記第２の抵抗膜の２点間に前記第２の電圧よりも高い第４の電圧のうちの少なくとも一方の電圧を印加し、前記第１の抵抗膜或いは前記第２の抵抗膜のうちの少なくとも一方を発熱させ、前記液体または液晶を加熱するタッチパネル加熱手段と、前記第１の温度センサにより検出した前記液体または液晶の温度に応じて、前記タッチ位置検出手段と前記タッチパネル加熱手段とを選択的に切換え、前記液体または液晶の温度を所定温度範囲に制御するタッチパネル駆動制御手段と、を備えるタッチパネルを、第３の基板と第４の基板との間に液晶層を挟持し、前記液晶層の温度を検出する第２の温度センサを備えた液晶表示パネルの表示面に積層し、前記第１の抵抗膜の２点間に第１の電圧を印加し、前記第２の抵抗膜の前記２点間とは異なる方向の２点間に第２の電圧を印加し、前記第１の基板と前記第２の基板の何れかの基板に外部からタッチ圧力が作用した際の撓み変形により前記第１の抵抗膜と前記第２の抵抗膜とが接触した位置の前記第１、第２電圧のそれぞれの印加方向における電圧値に基づきタッチ位置を検出するタッチ位置検出手段と、前記第１の抵抗膜の２点間に前記第１の電圧よりも高い第３の電圧、或いは前記第２の抵抗膜の２点間に前記第２の電圧よりも高い第４の電圧のうちの少なくとも一方の電圧を印加し、前記第１の抵抗膜或いは前記第２の抵抗膜のうちの少なくとも一方を発熱させ、前記液体または液晶を加熱するタッチパネル加熱手段と、前記第１の温度センサにより検出した前記液体または液晶の温度と、前記第２の温度センサにより検出した前記液晶表示パネルの液晶層の温度に応じて、前記タッチ位置検出手段による前記第１の電圧及び前記第２の電圧の印加と、前記タッチパネル加熱手段による前記第３の電圧及び／又は前記第４の電圧の印加とを選択的に切換え、前記タッチパネルの発熱を前記液晶パネルに熱伝導することにより、前記液体または液晶の温度と前記液晶層の温度とをそれぞれの適正範囲内に制御するタッチパネル駆動制御手段と、を備える、ことを特徴とする。In order to solve the above problems, an embodiment of a liquid crystal display device with a touch panel according to the present invention includes a first substrate on which a first resistance film is formed, and a frame-shaped sealing material bonded to the first substrate. A second substrate on which a second resistance film is formed, the second substrate being disposed so as to face the first resistance film while maintaining a predetermined gap with the first substrate, and the first substrate and the second substrate A liquid or liquid crystal sealed in a region surrounded by the sealing material between the substrate, a first temperature sensor for detecting a temperature of the liquid or the liquid crystal, and two points of the first resistance film A first voltage is applied, a second voltage is applied between two points in a direction different from the two points of the second resistive film, and the first resistive film is applied to the second resistive film. Based on the voltage values in the application directions of the first voltage and the second voltage at the contact positions. Touch position detecting means for detecting a touch position and a third voltage higher than the first voltage between the two points of the first resistive film, or the second voltage between the two points of the second resistive film. At least one of the fourth voltages higher than the voltage of 2 is applied, heats at least one of the first resistance film or the second resistance film, and heats the liquid or liquid crystal. The touch position detecting means and the touch panel heating means are selectively switched according to the temperature of the liquid or liquid crystal detected by the touch panel heating means and the first temperature sensor, and the temperature of the liquid or liquid crystal is set to a predetermined temperature. A touch panel having a touch panel drive control means for controlling the range, a second temperature sensor for sandwiching a liquid crystal layer between a third substrate and a fourth substrate and detecting a temperature of the liquid crystal layer. Laminated on the display surface of the liquid crystal display panel, a first voltage is applied between the two points of the first resistive film, and the second voltage between the two points of the second resistive film is different between the two points. When the voltage of 2 is applied and a touch pressure is applied to the first substrate and the second substrate from the outside, the first resistance film and the second resistance film are Touch position detecting means for detecting a touch position based on the voltage values in the respective application directions of the first and second voltages at the position where the contact is made, and the first voltage between two points of the first resistance film A third voltage higher than the second voltage, or at least one of the fourth voltages higher than the second voltage is applied between two points of the second resistance film, and the first resistance film or the second voltage is applied. At least one of the second resistive films generates heat and heats the liquid or liquid crystal. By the touch position detecting means according to the temperature of the liquid or liquid crystal detected by the first temperature sensor and the temperature of the liquid crystal layer of the liquid crystal display panel detected by the second temperature sensor. The liquid crystal panel is configured to selectively switch between the application of the first voltage and the second voltage and the application of the third voltage and / or the fourth voltage by the touch panel heating means. Touch panel drive control means for controlling the temperature of the liquid or liquid crystal and the temperature of the liquid crystal layer within their proper ranges by conducting heat to each other.

本発明によれば、環境温度変化による誤動作を確実に防止した抵抗膜方式のタッチパネルとこれを搭載した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 resistive film type touch panel that reliably prevents malfunction due to a change in environmental temperature and a display device equipped with the same .

本発明の一実施形態としてのタッチパネル付き液晶表示装置を示した立面図である。It is the elevation which showed the liquid crystal display with a touch panel as one embodiment of the present invention. 上記タッチパネル付き液晶表示装置におけるタッチパネルを示した平面図である。It is the top view which showed the touch panel in the said liquid crystal display device with a touch panel. (ａ)、(ｂ)は、それぞれ、上記タッチパネルの模式的IIIa−IIIa線断面図と模式的IIIb−IIIb線断面図である。(a), (b) is a typical IIIa-IIIa line sectional view and a typical IIIb-IIIb line sectional view of the above-mentioned touch panel, respectively. (ａ)、(ｂ)は、それぞれ、上記タッチパネルのうちのタッチ側基板を内面側から見た平面図と、タッチ側基板と対向配置された基板を内面から見た平面図である。(a), (b) is the top view which looked at the touch side board | substrate among the said touch panels from the inner surface side, respectively, and the top view which looked at the board | substrate opposingly arranged with the touch side board | substrate from the inner surface. 本発明の一実施例としてのタッチパネル付き液晶表示装置における駆動回路を示す説明図である。It is explanatory drawing which shows the drive circuit in the liquid crystal display device with a touch panel as one Example of this invention. 上記タッチパネル付き液晶表示装置における温度制御動作を示すフローチャート図である。It is a flowchart figure which shows the temperature control operation | movement in the said liquid crystal display device with a touch panel. 上記タッチパネル付き液晶表示装置における温度制御動作を示す経時温度変化グラフ図である。It is a time-dependent temperature change graph figure which shows the temperature control operation | movement in the said liquid crystal display device with a touch panel. (ａ)、(ｂ)はそれぞれ、本発明のタッチパネルにおける電極配置の変形例を示す模式的斜視図である。(a), (b) is each a typical perspective view which shows the modification of the electrode arrangement | positioning in the touchscreen of this invention. 本発明のタッチパネルにおける電極配置の他の変形例を示す模式的斜視図である。It is a typical perspective view which shows the other modification of the electrode arrangement | positioning in the touchscreen of this invention.

図１に示されるように、本実施形態のタッチパネル付き液晶表示装置は、大略、抵抗膜式タッチパネル１と、これに表示面を対向させて配置された液晶表示パネル２とから成る。   As shown in FIG. 1, the liquid crystal display device with a touch panel according to the present embodiment is generally composed of a resistive touch panel 1 and a liquid crystal display panel 2 disposed so that the display surface faces the resistive touch panel 1.

タッチパネル１は、図２〜図５に示されるように、互いに対向させて配置されたタッチ側とその反対側（以下、反タッチ側という）の一対の透明基板１１，１２と、これら一対の透明基板１１，１２の対向する各内面の周囲縁辺部を除く略全面にわたりそれぞれ被設された第１と第２の透明な抵抗膜１３，１４と、タッチ側透明基板１１の第１の抵抗膜１３表面における複数の位置にそれぞれ予め定めた高さに突設された複数の突起状接点１５と、前記第１の基板と前記第２の基板との間隙を、前記複数の突起状接点の高さよりも大きい値に規定する絶縁性スペーサ１６と、前記一対の透明基板を所定の間隙を保って密閉接合する枠状のシール材１７と、本例では反タッチ側基板１２の内面でシール材１７と第２の抵抗膜１４間に配設されている温度センサ１８と、前記一対の透明基板１１，１２間の前記シール材１７により囲まれた空間内に封入された絶縁性液体または絶縁性液晶１９と、等で構成されている。 As shown in FIGS. 2 to 5, the touch panel 1 includes a pair of transparent substrates 11, 12 on the touch side and the opposite side (hereinafter referred to as an anti-touch side) disposed to face each other, and the pair of transparent substrates. The first and second transparent resistance films 13 and 14 provided over substantially the entire surface excluding the peripheral edges of the opposing inner surfaces of the substrates 11 and 12, and the first resistance film 13 of the touch-side transparent substrate 11. A plurality of protruding contacts 15 projecting at a predetermined height at a plurality of positions on the surface, and a gap between the first substrate and the second substrate are determined by the height of the plurality of protruding contacts. An insulating spacer 16 that defines a larger value, a frame-shaped sealing material 17 that hermetically bonds the pair of transparent substrates with a predetermined gap therebetween, and in this example, the sealing material 17 on the inner surface of the anti-touch side substrate 12. Between the second resistive films 14 That the temperature sensor 18, an insulating liquid or insulating liquid crystal 19 is sealed in a space surrounded by the by the sealing member 17 between the pair of transparent substrates 11 and 12, and a like.

一対の透明基板１１、１２はそれぞれ矩形をなすガラス板からなり、そのうちの反タッチ側透明基板１２には、一方の長手縁辺をタッチ側透明基板１１の長手縁辺から適長だけ突出させた突出縁部１２１が形成されている。ここで、反タッチ側透明基板１２の板厚が０．７ｍｍであるのに対し、タッチ側透明基板１１の板厚は０．３ｍｍと薄く設定され、オン接触させるためのタッチ圧力の軽減が図られている。   The pair of transparent substrates 11 and 12 are each formed of a rectangular glass plate, and the anti-touch side transparent substrate 12 has a protruding edge in which one long edge protrudes from the long edge of the touch side transparent substrate 11 by an appropriate length. A portion 121 is formed. Here, while the thickness of the anti-touch side transparent substrate 12 is 0.7 mm, the thickness of the touch side transparent substrate 11 is set to be as thin as 0.3 mm, so that the touch pressure for on-contact can be reduced. It has been.

第１、第２の抵抗膜１３、１４は、それぞれ、ＩＴＯ（indium tin oxide）で形成されており、そのシート抵抗は約２００Ω／□に設定されている。   The first and second resistance films 13 and 14 are each formed of ITO (indium tin oxide), and the sheet resistance is set to about 200Ω / □.

なお、図示されてはいないが、一対の透明基板１１、１２の各内面には、その全面にわたりＳｉＯ₂（二酸化珪素）膜が被着されており、このＳｉＯ₂膜上にＩＴＯからなる透明の前記第１、第２の各抵抗膜１３、１４が夫々積層されている。 Although not shown in the figure, a SiO ₂ (silicon dioxide) film is deposited over the entire inner surfaces of the pair of transparent substrates 11 and 12, and a transparent film made of ITO is formed on the SiO ₂ film. The first and second resistance films 13 and 14 are laminated.

本例のタッチパネル１では、枠状シール材１７よりも内側に、矩形状のタッチ入力を行うためのタッチエリアＡtが設定されており、このタッチエリアＡtと液晶表示パネル２の表示エリアＡdとは、略同面積で互いに重なる配置（図１参照）となっている。   In the touch panel 1 of the present example, a touch area At for performing a rectangular touch input is set on the inner side of the frame-shaped seal material 17, and the touch area At and the display area Ad of the liquid crystal display panel 2 are set. The arrangement is substantially the same and overlaps each other (see FIG. 1).

図４(ａ)に示されるように、タッチ側基板１１の内面に設けられた第１の抵抗膜１３の前記タッチエリアＡtに対応する領域に、複数の突起状接点１５が、互いに直交する２つの方向、例えば前記タッチエリアＡtの左右方向（以下、Ｘ軸方向という）と上下方向（以下、Ｙ軸方向という）とに、それぞれ予め定めたピッチでマトリクス状に立設されている。   As shown in FIG. 4A, a plurality of protruding contacts 15 are orthogonal to each other in a region corresponding to the touch area At of the first resistive film 13 provided on the inner surface of the touch-side substrate 11. In one direction, for example, in the left-right direction (hereinafter referred to as the X-axis direction) and the vertical direction (hereinafter referred to as the Y-axis direction) of the touch area At, they are erected in a matrix at predetermined pitches.

これら突起状接点１５は、図３に示すように、タッチ側透明基板１１の内面の複数の位置に、複数の透明な絶縁物からなる突起１５１をマトリクス配置で凸設し、これら突起１５１を透明な１枚の第１の抵抗膜１３で一括して被覆することにより形成されている。   As shown in FIG. 3, these protruding contacts 15 are provided with protrusions 151 made of a plurality of transparent insulators in a matrix arrangement at a plurality of positions on the inner surface of the touch-side transparent substrate 11, and these protrusions 151 are transparent. It is formed by covering with a single first resistance film 13 at a time.

突起１５１の形成方法としては、フォトリソグラフィーが好適であり、タッチ側透明基板１１の内面となる表面に透明な光硬化性樹脂を予め定めた膜厚に塗布した後、所定の接点配置パターンに対応したマスクを介して露光し現像処理することにより、同一の円錐台状をなす複数の突起１５１が所定のマトリクス配置で一括形成される。この場合、突起１５１は、フォトリソグラフィー処理を経ることにより自ずと側面がテーパ面となる円錐台状に形成され、これにより、第１の抵抗膜１３を容易に各突起１５１に隙間なく密着させて被覆することができる。   As a method for forming the protrusions 151, photolithography is suitable, and a transparent photo-curing resin is applied to the surface to be the inner surface of the touch-side transparent substrate 11 to a predetermined film thickness and then corresponds to a predetermined contact arrangement pattern By exposing and developing through the mask, a plurality of projections 151 having the same truncated cone shape are formed in a batch with a predetermined matrix arrangement. In this case, the protrusion 151 is formed into a truncated cone shape having a tapered side surface through a photolithography process, so that the first resistance film 13 can be easily adhered to each protrusion 151 without a gap. can do.

具体的には、前記複数の突起状接点１５は、２つの直交方向（タッチエリアＡtのＸ軸方向とＹ軸方向）にそれぞれ、０．０５ｍｍ、０．１ｍｍ、０．２ｍｍのいずれかのピッチＰで配列されている。そして、これら複数の突起状接点１５は、基部の直径が１５μｍで高さＨが２．０μｍの円錐台状をなしている。   Specifically, the plurality of projecting contacts 15 have a pitch of 0.05 mm, 0.1 mm, or 0.2 mm in two orthogonal directions (X-axis direction and Y-axis direction of the touch area At), respectively. Arranged at P. The plurality of projecting contacts 15 have a truncated cone shape with a base diameter of 15 μm and a height H of 2.0 μm.

第１の抵抗膜１３の長手方向両端部と第２の各抵抗膜１４の短手方向両端部には、夫々の各端縁に沿って、電圧を印加するための第１の電極１３１ａ、１３１ｂと第２の電極１４１ａ、１４１ｂが対向配設されている（図４(ａ)、(ｂ)参照）。したがって、第１の電極対１３１ａ、１３１ｂの対向方向（以下、Ｘ軸方向という）と第２の電極対１４１ａ、１４１ｂの対向方向（以下、Ｙ軸方向という）は直交している。   First electrodes 131a and 131b for applying a voltage along the respective edges at the longitudinal ends of the first resistive film 13 and the lateral ends of the second resistive films 14 And the second electrodes 141a and 141b are disposed to face each other (see FIGS. 4A and 4B). Therefore, the opposing direction of the first electrode pair 131a, 131b (hereinafter referred to as the X-axis direction) and the opposing direction of the second electrode pair 141a, 141b (hereinafter referred to as the Y-axis direction) are orthogonal.

これら、第１の電極対１３１ａ、１３１ｂと第２の電極対１４１ａ、１４１ｂは、銀等の金属ペーストや低抵抗金属の蒸着或いはスパッタリングにより、第１、第２の抵抗膜１３、１４の対応する各端縁に沿って短冊状に形成されており、これにより、第１の抵抗膜１３のＸ軸方向の両端間と、第２の抵抗膜１４のＹ軸方向の両端間とに印加される電圧を、第１の抵抗膜１３及び第２の抵抗膜１４の略全域に常に均等に作用させ、タッチ位置の電位をＸ、Ｙ座標に対応させて再現性良く高精度に検出することができる。   The first electrode pair 131a, 131b and the second electrode pair 141a, 141b correspond to the first and second resistance films 13, 14 by vapor deposition or sputtering of a metal paste such as silver or a low resistance metal. It is formed in a strip shape along each edge, and is thereby applied between both ends in the X-axis direction of the first resistance film 13 and between both ends in the Y-axis direction of the second resistance film 14. It is possible to detect the voltage at the touch position with high reproducibility and high accuracy by applying the voltage to the entire area of the first resistance film 13 and the second resistance film 14 evenly, and corresponding the potential of the touch position to the X and Y coordinates. .

第１の電極対１３１ａ、１３１ｂには、図４(ａ)に示すように、第１リード配線１３２ａ、１３２ｂがそれぞれ電気接続されている。これら第１リード配線１３２ａ、１３２ｂは、対応する第１の電極対１３１ａ、１３１ｂの一方の端部から引き出され、第１の抵抗膜１３の一方の長手縁部に沿って引き回されている。この場合、一方の第１リード配線１３２ａを他方の第１リード配線１３２ｂよりも長く引き回し、それぞれの引き回し端部にはタッチ側接続パッド１３３ａ、１３３ｂが形成されている。   As shown in FIG. 4A, first lead wires 132a and 132b are electrically connected to the first electrode pair 131a and 131b, respectively. The first lead wires 132a and 132b are drawn from one end of the corresponding first electrode pair 131a and 131b, and are routed along one longitudinal edge of the first resistance film 13. In this case, one first lead wire 132a is routed longer than the other first lead wire 132b, and touch-side connection pads 133a and 133b are formed at the respective lead ends.

一方、図４(ｂ)に示すように、第２の電極対１４１ａ、１４１ｂには、第２リード配線１４２ａ、１４２ｂがそれぞれ電気接続されている。この場合、第２の透明基板１２の突出縁部１２１から遠い方の第２の電極１４１ａに接続されている第２リード配線１４２ａは、第２の抵抗膜１４の一方の短手縁部に沿って引き回され、突出縁部１２１に設けられている第２接続端子１４３ａに電気接続されている。また、もう一方の突出縁部１２１に近い第２の電極１４１ｂは、前記第２接続端子１４３ａに平行に隣設されているもう一方の第２接続端子１４３ｂに、第２リード配線１４２ｂを介して直線的に電気接続されている。   On the other hand, as shown in FIG. 4B, the second lead wires 142a and 142b are electrically connected to the second electrode pairs 141a and 141b, respectively. In this case, the second lead wiring 142 a connected to the second electrode 141 a far from the projecting edge 121 of the second transparent substrate 12 extends along one short edge of the second resistance film 14. And is electrically connected to a second connection terminal 143a provided on the protruding edge 121. Further, the second electrode 141b near the other protruding edge 121 is connected to the other second connection terminal 143b adjacent in parallel to the second connection terminal 143a via the second lead wiring 142b. It is electrically connected in a straight line.

第２接続端子１４３ａ、１４３ｂの両サイドには、これらに平行に、第１接続端子１３５ａ、１３５ｂがそれぞれ並設されている。このように、タッチ位置検出に関与する４個の第１接続端子１３５ａ、１３５ｂ及び第２接続端子１４３ａ、１４３ｂが、突出縁部１２１の一方の端部側にまとめて、互いに平行に等間隔で並設されており、これにより、タッチパネル１に電気接続されるタッチ位置検出回路４（図５参照）の実装作業性が向上する。   On both sides of the second connection terminals 143a and 143b, first connection terminals 135a and 135b are arranged in parallel to each other. As described above, the four first connection terminals 135a and 135b and the second connection terminals 143a and 143b involved in the touch position detection are gathered together on one end side of the protruding edge 121 and are parallel to each other at equal intervals. The mounting workability of the touch position detection circuit 4 (see FIG. 5) that is electrically connected to the touch panel 1 is improved.

第１接続端子１３５ａ、１３５ｂには、それぞれ、反タッチ側接続パッド１３４ａ、１３４ｂが配線接続されている。これら反タッチ側接続パッド１３４ａ、１３４ｂは、前述したタッチ側透明基板１１に配設されているタッチ側接続パッド１３３ａ、１３３ｂに対応する位置に配設されている。即ち、図２に示すようにタッチ側透明基板１１を反タッチ側透明基板１２にシール材１７を介して接合した際に、タッチ側接続パッド１３３ａ、１３３ｂが反タッチ側接続パッド１３４ａ、１３４ｂの真上にそれぞれ重なり、図３(ｂ)に示すように銀ペースト等からなる基板間導通部材１３６を介して導通接続される構成となっている。   Anti-touch side connection pads 134a and 134b are connected to the first connection terminals 135a and 135b, respectively. These anti-touch side connection pads 134a and 134b are arranged at positions corresponding to the touch side connection pads 133a and 133b arranged on the touch side transparent substrate 11 described above. That is, as shown in FIG. 2, when the touch-side transparent substrate 11 is joined to the anti-touch-side transparent substrate 12 via the sealing material 17, the touch-side connection pads 133a and 133b are connected to the anti-touch-side connection pads 134a and 134b. As shown in FIG. 3 (b), they are superposed on each other, and are electrically connected via an inter-substrate conductive member 136 made of silver paste or the like.

図４(ｂ)において、反タッチ側透明基板１２の内面で、第２の各抵抗膜１４の一方（リード配線引き出し側とは反対側）の端部とシール材１７の配設予定位置との間に、タッチパネル用温度センサ１８が配設されている。このタッチパネル用温度センサ１８は、センサリード配線１８１を介して、突出縁部１２１のもう一方の端部に配設されているセンサ用接続端子１８２に電気接続されている。センサ用接続端子１８２の両サイドには、ヒータ用接続端子１４５ａ、１４５ｂがそれぞれ平行に並設されている。これらヒータ用接続端子１４５ａ、１４５ｂと第２の電極１４１ａ、１４１ｂは、それぞれ、ヒータリード配線１４４ａ、１４４ｂにより電気接続されている。これらタッチパネル１の温度制御に関与する３個の接続端子１４５ａ、１４５ｂ、１８２も、突出縁部１２１の他方の端部側（タッチ位置検出用接続端子列側とは反対側）にまとめて互いに平行に並設したから、タッチパネル１に電気接続される温度制御回路５（図５参照）の実装作業性がより向上する。 4B, on the inner surface of the anti-touch side transparent substrate 12, the end of one end of the second resistance film 14 (the side opposite to the lead wiring drawing side) and the position where the sealing material 17 is to be disposed. A touch panel temperature sensor 18 is disposed therebetween. The touch panel temperature sensor 18 is electrically connected to a sensor connection terminal 182 disposed at the other end of the protruding edge 121 via a sensor lead wiring 181 . On both sides of the sensor connection terminal 182, heater connection terminals 145a and 145b are arranged in parallel. The heater connection terminals 145a and 145b and the second electrodes 141a and 141b are electrically connected by heater lead wires 144a and 144b, respectively. The three connection terminals 145a, 145b, and 182 involved in the temperature control of the touch panel 1 are also parallel to each other on the other end side of the protruding edge 121 (on the side opposite to the touch position detection connection terminal row side). Therefore, the mounting workability of the temperature control circuit 5 (see FIG. 5) electrically connected to the touch panel 1 is further improved.

上述のように構成された一対の透明基板１１、１２は、図２に示すように、それぞれに設けられた第１、第２の各抵抗膜１３、１４を対向させ、所定の抵抗膜間距離Ｇを保持した状態でシール材１７により接合されている。本実施形態では、抵抗膜間距離Ｇが２．５μｍに設定されている。なお、シール材１７の材料としては、液晶パネル等で用いられているエポキシ樹脂等が好適に用いられる。   As shown in FIG. 2, the pair of transparent substrates 11 and 12 configured as described above have the first and second resistance films 13 and 14 provided to face each other, and a predetermined distance between the resistance films. It is joined by the sealing material 17 in a state where G is held. In this embodiment, the distance G between the resistance films is set to 2.5 μm. In addition, as a material of the sealing material 17, the epoxy resin etc. which are used with a liquid crystal panel etc. are used suitably.

したがって、本実施形態のタッチパネル１における接点間距離は、０．５μｍと充分に小さい。その結果、絶縁性液体または絶縁性液晶１９をセル内に密封してあるにも拘わらず、適度なタッチ押圧力で確実に接点をオン接触させることができる。   Therefore, the distance between the contacts in the touch panel 1 of the present embodiment is sufficiently small as 0.5 μm. As a result, although the insulating liquid or the insulating liquid crystal 19 is sealed in the cell, the contact can be surely brought into on-contact with an appropriate touch pressing force.

前記絶縁性液体または絶縁性液晶は、比抵抗が常温で１０の８乗Ω・ｃｍ以上であることが好ましい。   The insulating liquid or the insulating liquid crystal preferably has a specific resistance of 10 8 Ω · cm or more at room temperature.

一対の透明基板１１、１２間の空間（セル）内に密封されている絶縁性液体または絶縁性液晶１９としては、界面での光反射を可及的に抑制するため、透明基板１１、１２及び第１、第２の各抵抗膜１３、１４との光屈折率の差が０．１以下の透明物質であることが要求される。ここで、透明基板１１、１２や第１、第２の各抵抗膜１３、１４の光屈折率は約１．５であるから、絶縁性液体または絶縁性液晶１９の光屈折率は、１．４〜１．５であることが要求され、そのうちでも略一致する１．５がより好適である。   As the insulating liquid or the insulating liquid crystal 19 sealed in the space (cell) between the pair of transparent substrates 11 and 12, in order to suppress light reflection at the interface as much as possible, the transparent substrates 11 and 12 and The first and second resistance films 13 and 14 are required to be transparent materials having a difference in optical refractive index of 0.1 or less. Here, since the optical refractive index of the transparent substrates 11 and 12 and the first and second resistive films 13 and 14 is about 1.5, the optical refractive index of the insulating liquid or the insulating liquid crystal 19 is 1. It is required to be 4 to 1.5, and among them, 1.5 which is substantially the same is more preferable.

本実施形態では、上述のような光学特性を備えた絶縁性液体または絶縁性液晶１９として、イソプロピルアルコール（ＩＰＡ）が用いられている。その他の本発明に好適な絶縁性液体または絶縁性液晶１９としては、沸点１００℃以上の有機、または無機の絶縁性の液状物質であって、具体的には、ブタノール、トルエン、キシレン、イソブチルアルコール、イソペプンチルアルコール、酢酸イソブチル、酢酸ブチル、テトラクロルエチレン、メチルイソブチルケトン、メチルブチルケトン、エチレングリコールモノエーテル、エチレングリコールモノエーテルアセテート、エチレングリコールモノブチルエーテル、エチレングリコールモノメチルエーテル、テレビン油、液晶材料等を、好適に用いることができる。   In the present embodiment, isopropyl alcohol (IPA) is used as the insulating liquid or the insulating liquid crystal 19 having the optical characteristics as described above. Other insulating liquid or insulating liquid crystal 19 suitable for the present invention is an organic or inorganic insulating liquid substance having a boiling point of 100 ° C. or higher, specifically, butanol, toluene, xylene, isobutyl alcohol. , Isopepentyl alcohol, isobutyl acetate, butyl acetate, tetrachloroethylene, methyl isobutyl ketone, methyl butyl ketone, ethylene glycol monoether, ethylene glycol monoether acetate, ethylene glycol monobutyl ether, ethylene glycol monomethyl ether, turpentine oil, liquid crystal material Etc. can be preferably used.

図１に戻って、タッチパネル１の反タッチ側（背面側）には、液晶表示パネル２が装着されている。液晶表示パネル２は、透明電極がそれぞれ形成された一対の矩形をなす透明基板２１、２２を、各電極形成面を対向させて所定の間隙を保って配置した状態で枠状シール材２３により接合し、枠状シール材で囲まれた一対の透明電極基板間には液晶が封入され、透明基板２１、２２の各外面にそれぞれ偏光板２４、２５を貼着して、構成されている。なお、この液晶表示パネル２は、ＴＮ型に限らず、ＳＴＮ型、非ツイストのホモジニアス型、垂直配向型、ベンド配向型、強誘電性または反強誘電性液晶表示パネル、或いは横電界（基板面に沿う方向の電界）を生じさせて液晶分子の配向状態を変化させる横電界制御型のものであってもよい。   Returning to FIG. 1, the liquid crystal display panel 2 is mounted on the non-touch side (back side) of the touch panel 1. The liquid crystal display panel 2 is joined by a frame-shaped sealing material 23 in a state where a pair of rectangular transparent substrates 21 and 22 each having a transparent electrode formed thereon are arranged with the respective electrode forming surfaces facing each other and maintaining a predetermined gap. The liquid crystal is sealed between a pair of transparent electrode substrates surrounded by a frame-shaped sealing material, and polarizing plates 24 and 25 are attached to the outer surfaces of the transparent substrates 21 and 22, respectively. The liquid crystal display panel 2 is not limited to the TN type, but is an STN type, a non-twisted homogeneous type, a vertical alignment type, a bend alignment type, a ferroelectric or antiferroelectric liquid crystal display panel, or a horizontal electric field (substrate surface). A horizontal electric field control type in which the alignment state of the liquid crystal molecules is changed by generating an electric field in a direction along the vertical axis.

上記液晶表示パネル２には、本例ではシール材２３内の液晶封入空間内に液晶の温度を検出するための液晶温度センサ２６が配設されている。なお、この液晶温度センサ２６は、液晶封入空間内に限らず、液晶封入空間外の例えば背面側の透明基板２２外面に配設してもよい。   The liquid crystal display panel 2 is provided with a liquid crystal temperature sensor 26 for detecting the temperature of the liquid crystal in the liquid crystal sealing space in the sealing material 23 in this example. The liquid crystal temperature sensor 26 is not limited to the liquid crystal enclosure space, and may be disposed outside the liquid crystal enclosure space, for example, on the outer surface of the transparent substrate 22 on the back side.

上述した液晶表示パネル２は、タッチパネル１の反タッチ側基板１２の外面に観察側偏光板２４を対面させ、透明な粘着材または樹脂からなる接着層３により貼付けられている。   The liquid crystal display panel 2 described above is adhered to the outer surface of the anti-touch side substrate 12 of the touch panel 1 with the observation-side polarizing plate 24 facing the adhesive layer 3 made of a transparent adhesive material or resin.

そして、本実施形態のタッチパネル付き液晶表示装置には、駆動制御装置として、図５に示すように、タッチ位置検出回路４、タッチパネル温度制御回路５、前記タッチ位置検出回路４のタッチ位置検出手段４６と前記タッチパネル温度制御回路５のタッチパネル温度制御手段５３とを制御するタッチパネル駆動制御手段６、液晶表示パネル駆動手段７を備えた液晶表示パネル駆動回路８、及び前記タッチパネル駆動制御手段６と液晶表示パネル駆動手段７とを制御することにより本装置全体を統括的に制御するタッチパネル―液晶表示パネル制御手段９、が装備されている。 In the liquid crystal display device with a touch panel of the present embodiment, as shown in FIG. 5, the touch position detection circuit 46 of the touch position detection circuit 4 , the touch position detection circuit 4 , the touch panel temperature control circuit 5, as a drive control device. the touch panel touch panel drive control means 6 for controlling the touch panel temperature control means 53 of the temperature control circuit 5, the liquid crystal display panel LCD display with a drive means 7 the panel drive circuit 8, and the touch panel drive control means 6 and the liquid crystal display panel and the touch panel collectively controls the entire apparatus by controlling the driving unit 7 - liquid crystal display panel control unit 9, is equipped.

タッチ位置検出回路４は、第１〜第３の導通切換スイッチ４１、４２、４３、定電圧電源４４、タッチ位置の電位を測定するための電圧測定器４５、及びタッチ位置検出手段４６からなる。第１、第２の導通切換スイッチ４１、４２は、定電圧電源４４による電圧印加回路を第１の抵抗膜１３と第２の各抵抗膜１４との間で切り換えるためのスイッチであり、第３の導通切換回路４３はタッチ位置における電圧値の検出回路を切り換えるためのスイッチである。タッチ位置検出手段４６は、第１〜第３の導通切換スイッチ４１、４２、４３の切換を制御し、Ｘ、Ｙ軸各方向に交互に電圧を印加し、その都度、電圧測定器４５によりタッチ位置の電圧値を読み取り、これらのデータからＸ、Ｙ座標で表されるタッチ位置を算出する。 The touch position detection circuit 4 includes first to third conduction changeover switches 41 , 42 , 43 , a constant voltage power supply 44, a voltage measuring device 45 for measuring the potential at the touch position, and touch position detection means 46. The first and second conduction changeover switches 41 and 42 are switches for switching the voltage application circuit by the constant voltage power supply 44 between the first resistance film 13 and each of the second resistance films 14. The continuity switching circuit 43 is a switch for switching the voltage value detection circuit at the touch position. The touch position detecting means 46 controls the switching of the first to third continuity changeover switches 41, 42, and 43, and alternately applies a voltage in each direction of the X and Y axes, and touches the voltage measuring device 45 each time. The position voltage value is read, and the touch position represented by the X and Y coordinates is calculated from these data.

前記電圧測定器４５の測定値に基づく前記タッチ位置のＸ，Ｙ座標値は、次のような演算により算出される。   The X and Y coordinate values of the touch position based on the measurement value of the voltage measuring device 45 are calculated by the following calculation.

定電圧電源４４の電圧値をＶ_０、第１の抵抗膜１３のＸ軸方向の一端のＸ座標値を０、第１の抵抗膜１３のＸ軸方向の他端のＸ座標値を１、タッチ位置のＸ座標をｘ、第１の抵抗膜１３のＸ軸方向の両端間の抵抗値をｒ_ｘ、電圧測定器４５の内部抵抗値をＲとすると、前記第１の抵抗膜１３のＸ軸方向の両端（第１の電極対１３１ａ、１３１ｂ）間に前記電圧Ｖ_０を印加したときの前記電圧測定器４５の測定電圧値Ｖ（ｘ）は、ｒ_ｘ≪Ｒであるため、
Ｖ（ｘ）＝Ｖ_０（１−ｘ）
で得られる。 The voltage value of the constant voltage power supply 44 is V ₀ , the X coordinate value of one end of the first resistance film 13 in the X axis direction is 0, the X coordinate value of the other end of the first resistance film 13 in the X axis direction is 1, Assuming that the X coordinate of the touch position is x, the resistance value between both ends of the first resistance film 13 in the X-axis direction is r _x , and the internal resistance value of the voltage measuring device 45 is R, X of the first resistance film 13 Since the measured voltage value V (x) of the voltage measuring device 45 when the voltage V ₀ is applied between both ends in the axial direction (first electrode pair 131a, 131b) is r _x << R,
V (x) = V ₀ (1-x)
It is obtained by.

また、第２の抵抗膜１４のＹ軸方向の一端のＹ座標値を０、第２の抵抗膜１４のＹ軸方向の他端のＹ座標値を１、タッチ位置のＹ座標をｙ、第２の抵抗膜１４のＹ軸方向の両端（第２の電極対１４１ａ、１４１ｂ）間の抵抗値をｒ_ｙとすると、第２の抵抗膜１４のＹ軸方向の両端間に前記電圧Ｖ_０を印加したときの前記電圧測定器４５による測定電圧値Ｖ（ｙ）は、ｒ_ｙ≪Ｒであるため、
Ｖ（ｙ）＝Ｖ_０（１−ｙ）
で得られる。 Further, the Y coordinate value of one end of the second resistance film 14 in the Y axis direction is 0, the Y coordinate value of the other end of the second resistance film 14 in the Y axis direction is 1, the Y coordinate of the touch position is y, When the resistance value between the two ends of the resistive film 14 in the Y-axis direction (second electrode pair 141a, 141b) is r _y , the voltage V ₀ is applied between the both ends of the second resistive film 14 in the Y-axis direction. Since the measured voltage value V (y) by the voltage measuring device 45 when applied is r _y << R,
V (y) = V ₀ (1-y)
It is obtained by.

したがって、前記タッチ位置のＸ座標ｘとＹ座標ｙは、
ｘ＝１−Ｖ（ｘ）／Ｖ_０
ｙ＝１−Ｖ（ｙ）／Ｖ_０
により求めることができる。 Therefore, the X coordinate x and Y coordinate y of the touch position are
x = 1−V (x) / V ₀
y = 1−V (y) / V ₀
It can ask for.

タッチパネル温度制御回路５は、ヒータ用電源５１、通電路開閉スイッチ５２、並びに、前記タッチパネル用温度センサ１８及び液晶温度センサ２６と信号線で接続され、それら両センサ１７、２６から出力される温度検出信号に応じて通電開閉スイッチ５２を開閉制御し、タッチパネル１内に密封された絶縁性液体または絶縁性液晶１９と液晶表示パネル２の基板間に封止された液晶の温度を適正範囲内に制御するタッチパネル温度制御手段５３、から成る。ここで、ヒータ用電源５１の出力電圧の大きさは、前記タッチ位置検出用の定電圧電源４４による出力電圧（本例では５Ｖに設定）に比べて充分に大きい２０Ｖに設定されている。 The touch panel temperature control circuit 5 is connected to the heater power source 51, the energization path opening / closing switch 52, the touch panel temperature sensor 18 and the liquid crystal temperature sensor 26 through signal lines, and detects the temperature output from both the sensors 17, 26. The energization opening / closing switch 52 is controlled to open and close according to the signal, and the temperature of the liquid crystal sealed between the insulating liquid or the insulating liquid crystal 19 sealed in the touch panel 1 and the substrate of the liquid crystal display panel 2 is controlled within an appropriate range. the touch panel temperature control means 53 for, consists. Here, the magnitude of the output voltage of the heater power supply 51 is set to 20 V, which is sufficiently larger than the output voltage (set to 5 V in this example) from the constant voltage power supply 44 for touch position detection.

タッチパネル駆動制御手段６は、前記タッチ位置検出手段４６とタッチパネル温度制御手段５３に互いに信号線で接続され、タッチパネル１と液晶表示パネル２のそれぞれの温度を適正範囲内に制御しつつ、タッチ位置検出手段４６によるタッチ位置検出動作を制御し、タッチパネル１から送られるタッチ入力情報を処理し、前記タッチパネル―液晶表示パネル制御回路９に座標情報信号を出力する。   The touch panel drive control means 6 is connected to the touch position detection means 46 and the touch panel temperature control means 53 through signal lines, and detects the touch position while controlling the temperatures of the touch panel 1 and the liquid crystal display panel 2 within an appropriate range. The touch position detection operation by means 46 is controlled, touch input information sent from touch panel 1 is processed, and a coordinate information signal is output to touch panel-liquid crystal display panel control circuit 9.

次に、タッチパネル−液晶表示パネル駆動制御手段９により実施される本タッチパネル付き液晶表示装置の動作について、図６のフローチャートと図７の装置内温度の経時変化を示すグラフ図に基づき説明する。なお、ここで設定されている下限温度とは、低温時におけるタッチパネル１の密封媒体つまり絶縁性液体または絶縁性液晶１９の体積収縮による誤動作が発生する可能性のある温度で、イソプロピルアルコールを密封媒体とした本実施形態では−１０℃である。また設定温度とは、液晶表示パネル２の液晶の応答速度や粘性等の特性の変化が表示に悪影響を及ぼし始める下限の温度で、封止液晶の種類によって異なっている。   Next, the operation of the present liquid crystal display device with a touch panel implemented by the touch panel-liquid crystal display panel drive control means 9 will be described with reference to the flowchart of FIG. 6 and the graph showing the time-dependent change of the internal temperature of FIG. Note that the lower limit temperature set here is a temperature at which a malfunction may occur due to volume shrinkage of the sealing medium of the touch panel 1, that is, the insulating liquid or the insulating liquid crystal 19 at a low temperature, and isopropyl alcohol is used as the sealing medium. In this embodiment, the temperature is -10 ° C. The set temperature is a lower limit temperature at which changes in the response speed and viscosity of the liquid crystal of the liquid crystal display panel 2 begin to adversely affect the display, and differs depending on the type of sealing liquid crystal.

まず、本タッチパネル付き液晶表示装置の主電源をオンする。主電源がオンされたら、前記タッチパネル駆動制御手段６から前記タッチパネル温度制御手段４３に指示信号が送られ、タッチパネル用温度センサ１８と液晶温度センサ２６による温度検出が開始される。   First, the main power supply of the liquid crystal display device with a touch panel is turned on. When the main power is turned on, an instruction signal is sent from the touch panel drive control means 6 to the touch panel temperature control means 43, and temperature detection by the touch panel temperature sensor 18 and the liquid crystal temperature sensor 26 is started.

タッチパネル温度制御手段５３は、図７に示されるように、タッチパネル１の検出温度（以下、温度Ｔ1という）と液晶表示パネル２の検出温度（以下、温度Ｔ2という）の少なくとも何れか一方が下限温度以下の場合（図７の例では両温度Ｔ1、Ｔ2が下限温度より低い）、通電開閉スイッチ４２を閉じ、ヒータ用電源５１により２０Ｖのヒータ電圧を第２の抵抗膜１４に印加して発熱させる。また、これと同時に、ヒータをオンした旨の信号をタッチパネル駆動制御手段６に送る。   As shown in FIG. 7, the touch panel temperature control means 53 has at least one of a detected temperature of the touch panel 1 (hereinafter referred to as temperature T1) and a detected temperature of the liquid crystal display panel 2 (hereinafter referred to as temperature T2) as a lower limit temperature. In the following cases (both temperatures T1 and T2 are lower than the lower limit temperature in the example of FIG. 7), the energization switch 42 is closed and a heater voltage of 20 V is applied to the second resistance film 14 by the heater power supply 51 to generate heat. . At the same time, a signal indicating that the heater is turned on is sent to the touch panel drive control means 6.

タッチパネル駆動制御手段６は、ヒータ・オン情報を受けたら、操作者によるタッチパネル操作を禁止するための信号を、前記タッチパネル―液晶表示パネル制御手段９に出力する。タッチパネル―液晶表示パネル制御手段９は、液晶表示パネル駆動手段７にタッチパネル操作を禁止するための信号を出力し、その旨の表示、例えば「タッチ入力不可」を液晶表示パネル２に表示させる。この状態においては、たとえ操作者がタッチ入力操作を行っても、タッチパネル駆動制御手段６はその操作によるタッチ位置検出手段４６からの入力情報の受け入れを拒否する。 Upon receiving the heater-on information, the touch panel drive control means 6 outputs a signal for prohibiting the touch panel operation by the operator to the touch panel-liquid crystal display panel control means 9. The touch panel-liquid crystal display panel control means 9 outputs a signal for prohibiting the touch panel operation to the liquid crystal display panel drive means 7 and displays a display to that effect, for example, “ touch input impossible ” on the liquid crystal display panel 2. In this state, even if the operator performs a touch input operation, the touch panel drive control unit 6 refuses to accept input information from the touch position detection unit 46 by the operation.

第２の抵抗膜１４へのヒータ電圧の印加が継続されると、図７に示すように、まずタッチパネル１の温度Ｔ1が上昇し始め、次いで、タッチパネル１が液晶表示パネル２に対する加熱手段となって液晶表示パネル２の温度Ｔ2も上昇し始める。やがて、タッチパネル１の温度が所定の上限温度（例えば４０℃）に到達したら、タッチパネル温度制御手段５３により、通電開閉スイッチ５２が開かれ、第２の抵抗膜１４へのヒータ電圧の印加が停止される。   When the application of the heater voltage to the second resistance film 14 is continued, the temperature T1 of the touch panel 1 begins to rise as shown in FIG. 7, and then the touch panel 1 becomes a heating means for the liquid crystal display panel 2. As a result, the temperature T2 of the liquid crystal display panel 2 also starts to rise. Eventually, when the temperature of the touch panel 1 reaches a predetermined upper limit temperature (for example, 40 ° C.), the energization opening / closing switch 52 is opened by the touch panel temperature control means 53, and the application of the heater voltage to the second resistance film 14 is stopped. The

タッチパネル駆動制御手段６は、タッチパネル温度制御手段５３から送られるヒータ電圧の印加停止情報に応じて、タッチ位置検出動作を開始する旨の信号を前記タッチパネル―液晶表示パネル制御回路９に出力し、液晶表示パネル２における「タッチ入力不可」の表示を解除させる。そして、この後は、操作者によるタッチ入力操作か行われたら、タッチ位置検出手段４６がそのタッチ位置を前述した演算方法により算出し、算出した位置検出情報をタッチパネル駆動手段６に出力する。タッチパネル駆動手段６は、入力されたタッチ位置検出情報を前記タッチパネル―液晶表示パネル制御手段９に送る。 The touch panel drive control means 6 outputs a signal to start the touch position detection operation to the touch panel-liquid crystal display panel control circuit 9 in accordance with the heater voltage application stop information sent from the touch panel temperature control means 53, and the liquid crystal The display of “ touch input impossible ” on the display panel 2 is canceled. Thereafter, when a touch input operation is performed by the operator, the touch position detection unit 46 calculates the touch position by the above-described calculation method, and outputs the calculated position detection information to the touch panel drive unit 6. The touch panel driving means 6 sends the input touch position detection information to the touch panel-liquid crystal display panel control means 9.

前記タッチパネル―液晶表示パネル制御手段９は、送られてきたタッチ位置検出情報に応じた表示画像情報を液晶表示パネル２に送り、そのタッチ位置検出画像を表示させる。   The touch panel-liquid crystal display panel control means 9 sends display image information corresponding to the received touch position detection information to the liquid crystal display panel 2 and displays the touch position detection image.

タッチ位置検出動作が実施されタッチ位置検出画像の表示が行われている間、ヒータ電圧がオフされているため、温度Ｔ1及び温度Ｔ2が共に徐々に低下し始める。温度Ｔ1と温度Ｔ2とでは、熱容量の小さいタッチパネル１の温度Ｔ1の方が低下する速度が大きく、やがて、温度Ｔ1が温度Ｔ2に先行して下限温度に低下する。   Since the heater voltage is turned off while the touch position detection operation is performed and the touch position detection image is displayed, both the temperature T1 and the temperature T2 begin to gradually decrease. In the temperature T1 and the temperature T2, the speed of the temperature T1 of the touch panel 1 having a small heat capacity decreases, and the temperature T1 decreases to the lower limit temperature before the temperature T2.

前記タッチパネル温度制御手段５３は、温度Ｔ1が下限温度まで低下した時点で、再度、ヒータ電圧をオンさせると共に、そのヒータ・オン情報を駆動制御手段５に送る。ヒータ・オン情報を受けた駆動制御手段５は、再び、液晶表示パネル１に「タッチ入力不可」を表示させる信号を送る。 The touch panel temperature control means 53 turns on the heater voltage again when the temperature T1 falls to the lower limit temperature, and sends the heater on information to the drive control means 5. Receiving the heater-on information, the drive control means 5 sends again a signal for displaying “ touch input impossible ” on the liquid crystal display panel 1.

また、タッチパネル温度制御手段５３は、温度Ｔ1だけでなく温度Ｔ2も並行して検出しており、温度Ｔ2が設定温度よりも低下した場合は、温度Ｔ1が下限温度以上であってもヒータをオンさせ、液晶表示パネル１に「タッチ入力不可」を表示させる。 The touch panel temperature control means 53 detects not only the temperature T1 but also the temperature T2 in parallel . If the temperature T2 falls below the set temperature, the heater is turned on even if the temperature T1 is equal to or higher than the lower limit temperature. And “ touch input impossible ” is displayed on the liquid crystal display panel 1.

上述した動作フローが、メイン電源がオフされるまで、繰り返し実施され、正確なタッチ入力による良好な液晶表示が安定して実施される。   The above-described operation flow is repeatedly performed until the main power is turned off, and good liquid crystal display by accurate touch input is stably performed.

なお、上述したヒータ・オフからヒータ・オンまでのタッチ操作が許可される時間、つまり、タッチパネルの温度Ｔ1が上限温度から下限温度に低下する時間は、環境温度にもよるが、通常の使用環境における自然冷却のみによる温度低下であれば、ヒータ・オンからヒータ・オフまでのヒータ加熱時間つまり「タッチ入力不可」の時間に比べて充分に長く、「タッチ入力不可」の時間が多すぎて本実施形態のタッチパネル付液晶表示装置の実使用上問題となるような虞はない。   Note that the time during which the touch operation from the heater-off to the heater-on described above is permitted, that is, the time during which the touch panel temperature T1 decreases from the upper limit temperature to the lower limit temperature depends on the environmental temperature, If the temperature drops only due to natural cooling, the heater heating time from heater on to heater off, which is sufficiently longer than the “touch input disabled” time, is too long and the “touch input disabled” time is too long. There is no possibility of causing a problem in actual use of the liquid crystal display device with a touch panel of the embodiment.

以上のように、本実施形態のタッチパネル付き液晶表示装置では、タッチパネルのセル内に第１及び第２の抵抗膜１３、１４と屈折率が近似する絶縁性液体または絶縁性液晶１９を密封したから、密封媒体とセルとの界面における光の反射を小さく抑えることができ、その結果、タッチパネル１を介した液晶表示パネル２の表示の視認性が向上する。   As described above, in the liquid crystal display device with a touch panel of the present embodiment, the insulating liquid or the insulating liquid crystal 19 whose refractive index is close to that of the first and second resistance films 13 and 14 is sealed in the cell of the touch panel. The reflection of light at the interface between the sealing medium and the cell can be kept small, and as a result, the display visibility of the liquid crystal display panel 2 via the touch panel 1 is improved.

また、上述のようにセル内に絶縁性液体または絶縁性液晶１９を密封するとタッチ面の押圧力（タッチ圧力）に対する反発力（タッチ反力）が強くなるが、タッチパネル１のセル内に突起状接点１５をマトリクス配置で凸設したから、必要最小限のタッチ圧力でタッチ側透明基板１１を撓ませるだけで押圧接点をオン接触させることができ、安定して押圧接点を容易且つ確実にオン接触させることができる。   Further, when the insulating liquid or the insulating liquid crystal 19 is sealed in the cell as described above, the repulsive force (touch reaction force) against the pressing force (touch pressure) on the touch surface becomes strong. Since the contacts 15 are convexly arranged in a matrix arrangement, the pressing contact can be turned on simply by bending the touch-side transparent substrate 11 with the minimum necessary touch pressure, and the pressing contact can be easily and reliably turned on. Can be made.

そして、タッチパネル１のセル内に温度センサ１８を設置し、第２の抵抗膜１４をヒータとして兼用し、セル内に密封した絶縁性液体または絶縁性液晶１９の温度に応じ第２の抵抗膜１４にタッチ位置検出時よりも充分に大きい電圧を印加して発熱させることにより、絶縁性液体または絶縁性液晶１９の温度を適正範囲の下限温度以上に保持することができる。その結果、上述したようにタッチ接点を突起状接点１５にしてタッチ接点間距離を近接させたために発生し易くなった欠点、つまり、環境温度が低下した際の密封媒体の体積収縮により接点が自然に接触する誤動作の発生を、確実に解消することができる。   Then, the temperature sensor 18 is installed in the cell of the touch panel 1 and the second resistance film 14 is also used as a heater, and the second resistance film 14 is used according to the temperature of the insulating liquid or the insulating liquid crystal 19 sealed in the cell. By applying a voltage sufficiently higher than that at the time of detecting the touch position to generate heat, the temperature of the insulating liquid or the insulating liquid crystal 19 can be kept above the lower limit temperature of the appropriate range. As a result, as described above, the touch contact is the protruding contact 15 and the distance between the touch contacts is made closer, that is, the contact is naturally caused by the volume shrinkage of the sealing medium when the environmental temperature is lowered. Occurrence of malfunctions that come into contact with can be reliably eliminated.

また、本実施形態では、ヒータ・オン中はタッチ位置検出を行わず、ヒータ・オフ時にのみタッチ位置検出を行うから、高度なタッチ位置検出精度が得られる。   In the present embodiment, touch position detection is not performed while the heater is turned on, and touch position detection is performed only when the heater is turned off, so that high touch position detection accuracy can be obtained.

さらに、密封媒体を加熱するヒータとして、タッチ位置検出用の第２の抵抗膜１４を兼用したから、専用のヒータ部材を配設する場合に比べて、構造が顕著に簡素化すると共に配線の引き回し配設も容易となり、実装上極めて有利となる。   Furthermore, since the second resistive film 14 for detecting the touch position is also used as a heater for heating the sealing medium, the structure is remarkably simplified and wiring is routed compared to the case where a dedicated heater member is provided. Arrangement is also easy, which is extremely advantageous for mounting.

またさらに、タッチパネル１自体を液晶表示パネル２のヒータとし、液晶表示パネル２にも温度センサ２６を配設し、タッチパネル１の温度センサ１８による検出温度に加えて、温度センサ２６が検出する液晶温度にも応じてタッチパネル１へのヒータ電圧のオン・オフを制御し、前記タッチパネル１よりの発熱を前記液晶パネルに熱伝導することにより、液晶の温度を適正範囲内に制御することができる。この場合、液晶表示パネル２用の専用ヒータを設置する場合に比べ、表示装置全体の薄型化が格段に促進される。   Furthermore, the touch panel 1 itself is used as a heater for the liquid crystal display panel 2, and a temperature sensor 26 is also provided in the liquid crystal display panel 2, and in addition to the temperature detected by the temperature sensor 18 of the touch panel 1, the liquid crystal temperature detected by the temperature sensor 26. Accordingly, the heater voltage to the touch panel 1 is controlled to be turned on / off, and the heat generated from the touch panel 1 is conducted to the liquid crystal panel, whereby the temperature of the liquid crystal can be controlled within an appropriate range. In this case, compared with the case where a dedicated heater for the liquid crystal display panel 2 is installed, the reduction in the thickness of the entire display device is greatly promoted.

なお、本発明は、上記実施形態に限定されるものではなく、種々の変形が可能である。たとえば、上記実施形態では第２の抵抗膜１４だけをヒータとして兼用したが、これに限らず、第１の抵抗膜１３だけをヒータとして兼用しても良い。また、第１、第２の双方の抵抗膜１３、１４を共にヒータとして兼用してもよく、これにより、加熱機能がアップし、タッチパネル１や液晶表示パネル２の昇温速度が上昇する。   In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible. For example, in the above embodiment, only the second resistance film 14 is also used as a heater. However, the present invention is not limited to this, and only the first resistance film 13 may be used as a heater. In addition, both the first and second resistance films 13 and 14 may be used as heaters, thereby increasing the heating function and increasing the heating rate of the touch panel 1 and the liquid crystal display panel 2.

また、図８(ａ)に示すように、第２の抵抗膜１４にタッチ位置検出用の第２の電極対１４１ａ、１４１ｂとは別に、この電極対の対向方向に直交する方向に対向させてヒータ電圧印加専用の第４の電極対１４１ｃ、１４１ｄを設けてもよい。   Further, as shown in FIG. 8A, the second resistive film 14 is opposed to the second electrode pair 141a and 141b for detecting the touch position in a direction orthogonal to the opposing direction of the electrode pair. A fourth electrode pair 141c and 141d dedicated to heater voltage application may be provided.

さらに、図８(ｂ)に示すように、上記変形例とは逆に、第１の抵抗膜１３にタッチ位置検出用の第１の電極対１３１ａ、１３１ｂとは別に、この電極対の対向方向に直交する方向に対向させてヒータ電圧印加専用の第３の電極対１３１ｃ、１３１ｄを設けてもよい。   Further, as shown in FIG. 8 (b), contrary to the above-described modification, the opposing direction of the electrode pair on the first resistive film 13 is separated from the first electrode pair 131a and 131b for touch position detection. A third electrode pair 131c and 131d dedicated to heater voltage application may be provided so as to face each other in a direction orthogonal to the first electrode.

またさらに、図９に示すように、第１、第２の抵抗膜１３、１４の双方に、それぞれ、互いに直交する方向に対向させてタッチ位置検出用電極対１３１ａ、１３１ｂとヒータ電圧印加用電極対１３１ｃ、１３１ｄ及びタッチ位置検出用電極対１４１ａ、１４１ｂとヒータ電圧印加用電極対１４１ｃ、１４１ｄを設けてもよい。   Furthermore, as shown in FIG. 9, both the first and second resistance films 13 and 14 are opposed to each other in directions orthogonal to each other, and the touch position detection electrode pairs 131a and 131b and the heater voltage application electrodes are provided. The pair 131c and 131d, the touch position detection electrode pair 141a and 141b, and the heater voltage application electrode pair 141c and 141d may be provided.

さらにまた、第１、第２の抵抗膜１３、１４の双方のタッチ位置検出用電極対１３１ａ、１３１ｂと１４１ａ、１４１ｂを共にヒータ電圧印加用電極対として兼用してもよい。   Furthermore, both the touch position detection electrode pairs 131a and 131b and 141a and 141b of both the first and second resistance films 13 and 14 may be used as heater voltage application electrode pairs.

加えて、上記実施形態では、突起状接点１５を設けてタッチ圧力の軽減を図ったが、これに限らず、セル間隙を狭くする等の方法によりオン接触に必要なタッチ圧力を軽減することにより、タッチ接点を凹凸の無い通常のベタ状接点とすることもできる。   In addition, in the above embodiment, the projecting contact 15 is provided to reduce the touch pressure. However, the present invention is not limited to this, and by reducing the touch pressure necessary for on-contact by a method such as narrowing the cell gap. The touch contact can be a normal solid contact without unevenness.

なお、本発明のタッチパネルは液晶表示パネルに限らず、ＥＬ、ＰＤＰ、ＣＲＴ等の表示パネルに実装可能である。   The touch panel of the present invention is not limited to a liquid crystal display panel, and can be mounted on a display panel such as an EL, PDP, or CRT.

１ タッチパネル
１１、１２ 第１の（タッチ側）、
第２の（反タッチ側）透明基板
１３、１４ 第１、第２の抵抗膜
１３１ａ、１３１ｂ 第１の電極対
１３１ｃ、１３１ｄ 第３の電極対
１３２ａ、１３２ｂ 第１リード配線
１３３ａ、１３３ｂ タッチ側接続パッド
１３４ａ、１３４ｂ 反タッチ側接続パッド
１３５ａ、１３５ｂ 第１接続端子
１３６ 基板間導通部材
１４１ａ、１４１ｂ 第２の電極対
１４２ａ、１４２ｂ 第２リード配線
１４３ａ、１４３ｂ 第２接続端子
１４４ａ、１４４ｂ ヒータリード配線
１４５ａ、１４５ｂ ヒータ用接続端子
１５ 突起状接点
１６ 絶縁性スペーサ
１７ シール材
１８ タッチパネル用温度センサ
１８１ センサリード配線
１８２ センサ接続端子
１９ 絶縁性液体または絶縁性液晶
２ 液晶表示パネル
２１、２２ ガラス基板
２３ シール材
２４、２５ 偏光板
２６ 液晶温度センサ
３ 接着層
４ タッチ位置検出回路
４１〜４３ 第１〜第３の導通切換スイッチ
４４ 定電圧電源
４５ 電位測定器
４６ タッチ位置検出手段
５ タッチパネル温度制御回路
５１ ヒータ用電源
５２ 通電路開閉スイッチ
５３ タッチパネル温度制御手段
６ タッチパネル駆動制御手段
７ 液晶表示パネル駆動手段
８ 液晶表示パネル駆動回路
９ タッチパネル―液晶表示パネル制御手段 1 Touch panel 11, 12 1st (touch side),
Second (anti-touch side) transparent substrates 13 and 14 First and second resistance films 131a and 131b First electrode pair 131c and 131d Third electrode pair 132a and 132b First lead wirings 133a and 133b Touch side connection Pads 134a, 134b Anti-touch side connection pads 135a, 135b First connection terminal 136 Inter-substrate conducting members 141a, 141b Second electrode pair 142a, 142b Second lead wirings 143a, 143b Second connection terminals 144a, 144b Heater lead wiring 145a 145b Heater connection terminal 15 Protruding contact 16 Insulating spacer 17 Sealing material 18 Touch panel temperature sensor 181 Sensor lead wiring 182 Sensor connection terminal 19 Insulating liquid or insulating liquid crystal 2 Liquid crystal display panel 21, 22 Glass substrate 23 Sealing material 24, 25 Polarizing plate 26 Liquid crystal temperature Degree sensor 3 Adhesive layer 4 Touch position detection circuits 41 to 43 First to third continuity changeover switches 44 Constant voltage power supply 45 Potential measuring device 46 Touch position detection means 5 Touch panel temperature control circuit 51 Heater power supply 52 Current path open / close switch 53 Touch panel temperature control means 6 Touch panel drive control means 7 Liquid crystal display panel drive means 8 Liquid crystal display panel drive circuit 9 Touch panel-liquid crystal display panel control means

Claims (16)

第１の抵抗膜が形成された第１の基板と、
前記第１の基板と接合する枠状のシール材を介して前記第１の基板と所定の間隙を保ち、前記第１の抵抗膜と対向するよう配置され、第２の抵抗膜が形成された第２の基板と、
前記第１の基板と前記第２の基板との間における前記シール材によって囲まれた領域に封入された液体または液晶と、
前記液体または液晶の温度を検出する温度センサと、
前記第１の抵抗膜の２点間に第１の電圧を印加し、前記第２の抵抗膜の前記２点間とは異なる方向の２点間に第２の電圧を印加し、前記第１の抵抗膜が前記第２の抵抗膜に接触した位置の前記第１の電圧及び前記第２の電圧のそれぞれの印加方向における電圧値に基づきタッチ位置を検出するタッチ位置検出手段と、
前記第１の抵抗膜の２点間に前記第１の電圧よりも高い第３の電圧、或いは前記第２の抵抗膜の２点間に前記第２の電圧よりも高い第４の電圧のうちの少なくとも一方の電圧を印加し、前記第１の抵抗膜或いは前記第２の抵抗膜のうちの少なくとも一方を発熱させ、前記液体または液晶を加熱するタッチパネル加熱手段と、
前記温度センサにより検出した前記液体または液晶の温度に応じて、前記タッチ位置検出手段と前記タッチパネル加熱手段とを選択的に切換え、前記液体または液晶の温度を所定温度範囲に制御するタッチパネル駆動制御手段と、
を有する、
ことを特徴とするタッチパネル。 A first substrate on which a first resistance film is formed ;
A second resistance film is formed by arranging the second resistance film so as to be opposed to the first resistance film while maintaining a predetermined gap with the first substrate via a frame-shaped sealing material bonded to the first substrate. A second substrate;
A liquid or liquid crystal sealed in the region surrounded by the sealing material between the said second substrate and said first substrate,
A temperature sensor for detecting the temperature of the liquid or liquid crystal;
A first voltage is applied between two points of the first resistive film, a second voltage is applied between two points in a direction different from the two points of the second resistive film, Touch position detecting means for detecting a touch position based on voltage values in the application directions of the first voltage and the second voltage at a position where the resistance film is in contact with the second resistance film;
Of the third voltage higher than the first voltage between the two points of the first resistance film, or the fourth voltage higher than the second voltage between the two points of the second resistance film Touch panel heating means for applying at least one of the voltage, heating at least one of the first resistance film or the second resistance film, and heating the liquid or liquid crystal;
Touch panel drive control means for selectively switching between the touch position detecting means and the touch panel heating means according to the temperature of the liquid or liquid crystal detected by the temperature sensor, and controlling the temperature of the liquid or liquid crystal within a predetermined temperature range. and,
Having,
A touch panel characterized by that. 前記第１の抵抗膜には第１の電極対が対向配置され、前記第２の抵抗膜には前記第１の電極対の対向方向とは直交する方向に第２の電極対が対向配置され、前記第１の電圧と前記第３の電圧は前記第１の電極対を介し、前記第２の電圧と前記第４の電圧は前記第２の電極対を介して印加されることを特徴とする請求項１に記載のタッチパネル。   A first electrode pair is disposed opposite to the first resistance film, and a second electrode pair is disposed opposite to the second resistance film in a direction perpendicular to the facing direction of the first electrode pair. The first voltage and the third voltage are applied via the first electrode pair, and the second voltage and the fourth voltage are applied via the second electrode pair. The touch panel according to claim 1. 前記第１の抵抗膜に第１の電極対と第３の電極対とが互いに直交する方向に対向配置され、前記第２の抵抗膜に前記第１の電極対の対向方向とは直交する方向に第２の電極対が対向配置され、前記第１の電圧は前記第１の電極対を介し、前記第３の電圧は前記第３の電極対を介し、前記第２の電圧は前記第２の電極対を介して、それぞれ印加されることを特徴とする請求項１に記載のタッチパネル。 Direction a first electrode pair and the third pair of electrodes to said first resistance film is opposed to a direction orthogonal to each other, orthogonal to the first electrode pair facing direction of the second resistive film The second electrode pair is disposed oppositely, the first voltage is passed through the first electrode pair, the third voltage is passed through the third electrode pair , and the second voltage is fed to the second electrode The touch panel according to claim 1, wherein each of the touch panels is applied via a pair of electrodes . 前記第２の抵抗膜に第２の電極対と第４の電極対とが互いに直交する方向に対向配置され、前記第１の抵抗膜に前記第２の電極対の対向方向とは直交する方向に第１の電極対が対向配置され、前記第２の電圧は前記第２の電極対を介し、前記第４の電圧は前記第４の電極対を介し、前記第１の電圧は前記第１の電極対を介して、それぞれ印加されることを特徴とする請求項１に記載のタッチパネル。 Said second second pair of electrodes to the resistive film and the fourth electrode pair are oppositely disposed in the direction orthogonal to each other, the direction in which the first of said the resistive film second electrode pair opposing direction of perpendicular The first electrode pair is disposed opposite to the first electrode pair, the second voltage passes through the second electrode pair, the fourth voltage passes through the fourth electrode pair, and the first voltage passes through the first electrode pair. The touch panel according to claim 1, wherein each of the touch panels is applied via a pair of electrodes. 前記第１の抵抗膜には第１の電極対と第３の電極対とがそれぞれ直交する方向に対向配置され、前記第２の抵抗膜には前記第１の電極対の対向方向とは直交する方向に第２の電極対が対向配置されると共に前記第３の電極対の対向方向とは直交する方向に第４の電極対が対向配置され、前記第１乃至第４の電圧はそれぞれ前記第１乃至第４の電極対を介して印加されることを特徴とする請求項２に記載のタッチパネル。 Wherein the first resistive film disposed opposite to a direction in which the first electrode pair and the third pair of electrodes are orthogonal to each other, wherein the second resistive film orthogonal to the opposing direction of the first electrode pair fourth electrode pairs in the direction orthogonal to the opposing direction of the third electrode pair along with the second electrode pair are opposed in the direction in which is disposed opposite the first to fourth voltage said respective The touch panel according to claim 2, wherein the touch panel is applied through first to fourth electrode pairs . 前記第１、第２の抵抗膜は共に矩形をなし、前記第１乃至第４の電極対はそれぞれの対応する抵抗膜の端縁に沿って配設されていることを特徴とする請求項２乃至請求項５のうちの何れかの請求項に記載のタッチパネル。 3. The first and second resistance films are both rectangular, and the first to fourth electrode pairs are disposed along the edges of the corresponding resistance films, respectively. The touch panel according to any one of claims 5 to 5. 前記第１、第２の抵抗膜はＩＴＯ（indium tin oxide）からなり、前記第１乃至第４の電極対は金属ペーストで形成されていることを特徴とする請求項６に記載のタッチパネル。 7. The touch panel according to claim 6, wherein the first and second resistance films are made of ITO (indium tin oxide), and the first to fourth electrode pairs are formed of a metal paste. 前記シール材によって囲まれた領域に、前記第１の基板から前記第２の基板に、または前記第２の基板から前記第１の基板に向かって突出し、且つ対向する基板との間にすきまを与えるように形成された突起状接点が形成されていることを特徴とする請求項１乃至請求項５のうちの何れかの請求項に記載のタッチパネル。   In a region surrounded by the sealant, a gap is formed between the first substrate and the second substrate, or from the second substrate toward the first substrate and between the opposing substrates. 6. The touch panel according to claim 1, wherein a projecting contact formed so as to be provided is formed. 前記突起状接点は、突起状に形成された樹脂部と、前記樹脂部を覆う前記第１または第２の抵抗膜と、からなることを特徴とする請求項８に記載のタッチパネル。   The touch panel according to claim 8, wherein the protruding contact includes a resin portion formed in a protruding shape and the first or second resistance film covering the resin portion. 前記シール材によって囲まれた領域に配置され、前記第１の基板と前記第２の基板との間隙を、前記複数の突起状接点の高さよりも大きい値に規定する絶縁性スペーサが形成されていることを特徴とする請求項８に記載のタッチパネル。   An insulating spacer is formed which is disposed in a region surrounded by the sealing material and defines a gap between the first substrate and the second substrate to a value larger than a height of the plurality of protruding contacts. The touch panel as set forth in claim 8, wherein: 前記絶縁性スペーサは、前記第１の抵抗膜と前記第２の抵抗膜とのうち、何れか一方の抵抗膜上に設けられ、先端が他方の抵抗膜に当接する柱状スペーサであることを特徴とする請求項１０に記載のタッチパネル。 The insulating spacer is a columnar spacer provided on one of the first resistance film and the second resistance film and having a tip abutting against the other resistance film. The touch panel according to claim 10. 前記液体または液晶は、所定の抵抗値である請求項１乃至請求項１１のうちの何れかの請求項に記載のタッチパネル。   The touch panel according to claim 1, wherein the liquid or the liquid crystal has a predetermined resistance value. 前記タッチパネル駆動制御手段は、前記液体または液晶の温度が前記所定温度範囲の下限温度よりも低いときに前記加熱手段による加熱を実施し、前記所定範囲の上限温度に到達した時点で前記加熱手段による加熱を停止した後、前記位置検出手段によるタッチ位置検出を実施することを特徴とする請求項１乃至請求項１２のうちの何れかの請求項に記載のタッチパネル。   The touch panel drive control means performs heating by the heating means when the temperature of the liquid or liquid crystal is lower than a lower limit temperature of the predetermined temperature range, and when the temperature reaches the upper limit temperature of the predetermined range, The touch panel according to any one of claims 1 to 12, wherein after the heating is stopped, touch position detection is performed by the position detection unit. 第１の抵抗膜が形成された第１の基板と、
前記第１の基板と接合する枠状のシール材を介して前記第１の基板と所定の間隙を保ち、前記第１の抵抗膜と対向するよう配置され、第２の抵抗膜が形成された第２の基板と、
前記第１の基板と前記第２の基板との間における前記シール材によって囲まれた領域に封入された液体または液晶と、
前記液体または液晶の温度を検出する温度センサと、
前記第１の抵抗膜の２点間に第１の電圧を印加し、前記第２の抵抗膜の前記２点間とは異なる方向の２点間に第２の電圧を印加し、前記第１の抵抗膜が前記第２の抵抗膜に接触した位置の前記第１の電圧及び前記第２の電圧のそれぞれの印加方向における電圧値に基づきタッチ位置を検出するタッチ位置検出手段と、
前記第１の抵抗膜の２点間に前記第１の電圧よりも高い第３の電圧、或いは前記第２の抵抗膜の２点間に前記第２の電圧よりも高い第４の電圧のうちの少なくとも一方の電圧を印加し、前記第１の抵抗膜或いは前記第２の抵抗膜のうちの少なくとも一方を発熱させ、前記液体または液晶を加熱するタッチパネル加熱手段と、
前記温度センサにより検出した前記液体または液晶の温度に応じて、前記タッチ位置検出手段と前記タッチパネル加熱手段とを選択的に切換え、前記液体または液晶の温度を所定温度範囲に制御するタッチパネル駆動制御手段と、を備えるタッチパネルを、
表示パネルの表示面に積層し、
前記第１の抵抗膜の２点間に前記第１の電圧を印加し、前記第２の抵抗膜の前記２点間とは異なる方向の２点間に前記第２の電圧を印加し、前記第１の基板と前記第２の基板との何れかの基板に外部からタッチ圧力が作用した際の撓み変形により前記第１の抵抗膜と前記第２の抵抗膜とが接触した位置の前記第１の電圧及び前記第２の電圧のそれぞれの印加方向における電圧値に基づきタッチ位置を検出するタッチ位置検出手段と、
前記第１の抵抗膜の２点間に前記第１の電圧よりも高い第３の電圧、或いは前記第２の抵抗膜の２点間に前記第２の電圧よりも高い第４の電圧のうちの少なくとも一方の電圧を印加し、前記第１の抵抗膜或いは前記第２の抵抗膜のうちの少なくとも一方を発熱させ、前記液体または液晶を加熱するタッチパネル加熱手段と、
前記第１の温度センサにより検出した前記液体または液晶の温度と、前記タッチ位置検出手段による前記第１の電圧及び前記第２の電圧の印加と、前記タッチパネル加熱手段による前記第３の電圧及び／又は前記第４の電圧の印加とを選択的に切換え、前記液体または液晶の温度を適正範囲内に制御するタッチパネル駆動制御手段と、
を備える、
ことを特徴とするタッチパネル付き表示装置。 A first substrate on which a first resistance film is formed ;
A second resistance film is formed by arranging the second resistance film so as to be opposed to the first resistance film while maintaining a predetermined gap with the first substrate via a frame-shaped sealing material bonded to the first substrate. A second substrate;
A liquid or liquid crystal sealed in the region surrounded by the sealing material between the said second substrate and said first substrate,
A temperature sensor for detecting the temperature of the liquid or liquid crystal;
A first voltage is applied between two points of the first resistive film, a second voltage is applied between two points in a direction different from the two points of the second resistive film, Touch position detecting means for detecting a touch position based on voltage values in the application directions of the first voltage and the second voltage at a position where the resistance film is in contact with the second resistance film;
Of the third voltage higher than the first voltage between the two points of the first resistance film, or the fourth voltage higher than the second voltage between the two points of the second resistance film Touch panel heating means for applying at least one of the voltage, heating at least one of the first resistance film or the second resistance film, and heating the liquid or liquid crystal;
Touch panel drive control means for selectively switching between the touch position detecting means and the touch panel heating means according to the temperature of the liquid or liquid crystal detected by the temperature sensor, and controlling the temperature of the liquid or liquid crystal within a predetermined temperature range. A touch panel comprising
Laminated on the display surface of the display panel,
Applying the first voltage between two points of the first resistive film, applying the second voltage between two points in a direction different from the two points of the second resistive film; the position where the first resistive film and the second resistive film is contacted by the bending deformation when the touch pressure from the outside on one of the substrate acts between the second substrate and the first substrate first Touch position detecting means for detecting a touch position based on a voltage value in each application direction of the first voltage and the second voltage ;
Of the third voltage higher than the first voltage between the two points of the first resistance film, or the fourth voltage higher than the second voltage between the two points of the second resistance film Touch panel heating means for applying at least one of the voltage, heating at least one of the first resistance film or the second resistance film, and heating the liquid or liquid crystal;
The temperature of the liquid or liquid crystal detected by the first temperature sensor, the application of the first voltage and the second voltage by the touch position detection means, the third voltage by the touch panel heating means, and / or Or touch panel drive control means for selectively switching between application of the fourth voltage and controlling the temperature of the liquid or liquid crystal within an appropriate range;
Equipped with a,
A display device with a touch panel. 第１の抵抗膜が形成された第１の基板と、
前記第１の基板と接合する枠状のシール材を介して前記第１の基板と所定の間隙を保ち、前記第１の抵抗膜と対向するよう配置され、第２の抵抗膜が形成された第２の基板と、
前記第１の基板と前記第２の基板との間における前記シール材によって囲まれた領域に封入された液体または液晶と、
前記液体または液晶の温度を検出する第１の温度センサと、
前記第１の抵抗膜の２点間に第１の電圧を印加し、前記第２の抵抗膜の前記２点間とは異なる方向の２点間に第２の電圧を印加し、前記第１の抵抗膜が前記第２の抵抗膜に接触した位置の前記第１の電圧及び前記第２の電圧のそれぞれの印加方向における電圧値に基づきタッチ位置を検出するタッチ位置検出手段と、
前記第１の抵抗膜の２点間に前記第１の電圧よりも高い第３の電圧、或いは前記第２の抵抗膜の２点間に前記第２の電圧よりも高い第４の電圧のうちの少なくとも一方の電圧を印加し、前記第１の抵抗膜或いは前記第２の抵抗膜のうちの少なくとも一方を発熱させ、前記液体または液晶を加熱するタッチパネル加熱手段と、
前記第１の温度センサにより検出した前記液体または液晶の温度に応じて、前記タッチ位置検出手段と前記タッチパネル加熱手段とを選択的に切換え、前記液体または液晶の温度を所定温度範囲に制御するタッチパネル駆動制御手段と、を備えるタッチパネルを、
第３の基板と第４の基板との間に液晶層を挟持し、前記液晶層の温度を検出する第２の温度センサを備えた液晶表示パネルの表示面に積層し、
前記第１の抵抗膜の２点間に第１の電圧を印加し、前記第２の抵抗膜の前記２点間とは異なる方向の２点間に第２の電圧を印加し、前記第１の基板と前記第２の基板の何れかの基板に外部からタッチ圧力が作用した際の撓み変形により前記第１の抵抗膜と前記第２の抵抗膜とが接触した位置の前記第１、第２電圧のそれぞれの印加方向における電圧値に基づきタッチ位置を検出するタッチ位置検出手段と、
前記第１の抵抗膜の２点間に前記第１の電圧よりも高い第３の電圧、或いは前記第２の抵抗膜の２点間に前記第２の電圧よりも高い第４の電圧のうちの少なくとも一方の電圧を印加し、前記第１の抵抗膜或いは前記第２の抵抗膜のうちの少なくとも一方を発熱させ、前記液体または液晶を加熱するタッチパネル加熱手段と、
前記第１の温度センサにより検出した前記液体または液晶の温度と、前記第２の温度センサにより検出した前記液晶表示パネルの液晶層の温度に応じて、前記タッチ位置検出手段による前記第１の電圧及び前記第２の電圧の印加と、前記タッチパネル加熱手段による前記第３の電圧及び／又は前記第４の電圧の印加とを選択的に切換え、前記タッチパネルの発熱を前記液晶パネルに熱伝導することにより、前記液体または液晶の温度と前記液晶層の温度とをそれぞれの適正範囲内に制御するタッチパネル駆動制御手段と、
を備える、
ことを特徴とするタッチパネル付き液晶表示装置。 A first substrate on which a first resistance film is formed ;
A second resistance film is formed by arranging the second resistance film so as to be opposed to the first resistance film while maintaining a predetermined gap with the first substrate via a frame-shaped sealing material bonded to the first substrate. A second substrate;
A liquid or liquid crystal sealed in the region surrounded by the sealing material between the said second substrate and said first substrate,
A first temperature sensor for detecting a temperature of the liquid or liquid crystal;
A first voltage is applied between two points of the first resistive film, a second voltage is applied between two points in a direction different from the two points of the second resistive film, Touch position detecting means for detecting a touch position based on voltage values in the application directions of the first voltage and the second voltage at a position where the resistance film is in contact with the second resistance film;
Of the third voltage higher than the first voltage between the two points of the first resistance film, or the fourth voltage higher than the second voltage between the two points of the second resistance film Touch panel heating means for applying at least one of the voltage, heating at least one of the first resistance film or the second resistance film, and heating the liquid or liquid crystal;
A touch panel that selectively switches between the touch position detecting means and the touch panel heating means in accordance with the temperature of the liquid or liquid crystal detected by the first temperature sensor, and controls the temperature of the liquid or liquid crystal within a predetermined temperature range. A touch panel comprising drive control means,
A liquid crystal layer is sandwiched between a third substrate and a fourth substrate, and is laminated on a display surface of a liquid crystal display panel provided with a second temperature sensor for detecting the temperature of the liquid crystal layer;
A first voltage is applied between two points of the first resistive film, a second voltage is applied between two points in a direction different from the two points of the second resistive film, The first resistance film and the second resistance film at a position where the first resistance film and the second resistance film are in contact with each other due to bending deformation when a touch pressure is applied to the substrate from the outside. Touch position detecting means for detecting a touch position based on voltage values in the application directions of the two voltages;
Of the third voltage higher than the first voltage between the two points of the first resistance film, or the fourth voltage higher than the second voltage between the two points of the second resistance film Touch panel heating means for applying at least one of the voltage, heating at least one of the first resistance film or the second resistance film, and heating the liquid or liquid crystal;
The first voltage generated by the touch position detecting unit according to the temperature of the liquid or liquid crystal detected by the first temperature sensor and the temperature of the liquid crystal layer of the liquid crystal display panel detected by the second temperature sensor. And selectively switching between the application of the second voltage and the application of the third voltage and / or the fourth voltage by the touch panel heating means to conduct heat of the touch panel to the liquid crystal panel. Accordingly, a touch panel drive control means for controlling said liquid or liquid temperature and the temperature of the liquid crystal layer in each of the appropriate range,
Equipped with a,
A liquid crystal display device with a touch panel. 前記タッチパネル駆動制御手段は、前記液晶表示パネルの温度の適正範囲における下限温度を前記タッチパネルの温度の適正範囲内に設定し、前記液晶表示パネルの温度が設定された前記下限温度よりも低いときには前記タッチパネル加熱手段による加熱をヒータ・オン実施することを特徴とする請求項１５に記載のタッチパネル付き液晶表示装置。   The touch panel drive control means sets a lower limit temperature in an appropriate range of the temperature of the liquid crystal display panel within an appropriate range of the temperature of the touch panel, and when the temperature of the liquid crystal display panel is lower than the set lower limit temperature, The liquid crystal display device with a touch panel according to claim 15, wherein heating by the touch panel heating means is performed with a heater on.

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