JP2010204480A - Liquid crystal display device with touch panel - Google Patents
Liquid crystal display device with touch panel Download PDFInfo
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- JP2010204480A JP2010204480A JP2009051122A JP2009051122A JP2010204480A JP 2010204480 A JP2010204480 A JP 2010204480A JP 2009051122 A JP2009051122 A JP 2009051122A JP 2009051122 A JP2009051122 A JP 2009051122A JP 2010204480 A JP2010204480 A JP 2010204480A
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本発明は、液晶表示装置や乗り物用計器盤に取り付けられ、外光の反射による視認性の低下を防止するタッチパネル付き液晶表示装置に関する。 The present invention relates to a liquid crystal display device with a touch panel that is attached to a liquid crystal display device or a vehicle instrument panel and prevents deterioration in visibility due to reflection of external light.
携帯端末、ノートパソコン、カーナビゲーションなどの液晶表示装置には、タッチパネルを配置することが広く行なわれている。このようなタッチパネルでは、外光や室内灯下で入力作業を行なう場合に、タッチパネル電極部の透明導電膜による反射が起きるため、表示画面のコントラストが低下し、非常に視認性を低下させてしまっていた。
そこでこのような問題を解消するために、特開平１０−４８６２５号には、タッチパネル付き液晶表示装置において、液晶表示装置側から順に、第一の１／４波長板、タッチパネル透明電極基板、第二の１／４波長板、偏光板を配置する構成が提案されている。そして、一般的にタッチパネルと液晶表示装置とは、タッチパネル入力時に液晶表示装置の表示面が圧力を受け変形し、画像に歪みが発生するのを防ぐ為、空気層を介して配置されている。
この構成では、タッチパネル電極部の透明電極膜による反射光はカットできるが、液晶表示装置とタッチパネルの間に空気層が存在するため、タッチパネル最下面と空気層の界面での反射光が発生してしまうという問題がある。
さらにこの問題を解消するために、特開２０００−３２１５５８号、特開平１０−４８６２５号に提案されている構成において、タッチパネル最下面に低反射処理を施すことが提案されており、低反射処理としては、フッ素樹脂やシリコン樹脂を塗布したり、金属の多層膜を真空蒸着法やスパッタリング法で形成することが提案されている。この構成では、タッチパネル最下面に低反射処理層を設ける必要があり、製造工程や構成が煩雑となる。
また、特開平１０−４８６２５号や特開２０００−３２１５５８号の構成であっても、液晶表示装置表面の反射光をカットすることできず、外光が入射した場合に視認性が低下してしまう問題点がある。
A liquid crystal display device such as a portable terminal, a notebook computer, and a car navigation is widely provided with a touch panel. In such a touch panel, when an input operation is performed under external light or indoor light, reflection by the transparent conductive film of the touch panel electrode portion occurs, so that the contrast of the display screen is lowered and the visibility is extremely lowered. It was.
In order to solve such problems, Japanese Patent Application Laid-Open No. 10-48625 discloses a liquid crystal display device with a touch panel, in order from the liquid crystal display device side, the first quarter-wave plate, the touch panel transparent electrode substrate, the second The structure which arrange | positions the 1/4 wavelength plate of this and a polarizing plate is proposed. In general, the touch panel and the liquid crystal display device are arranged via an air layer in order to prevent the display surface of the liquid crystal display device from being deformed by pressure when the touch panel is input, and distortion of the image.
In this configuration, the reflected light from the transparent electrode film of the touch panel electrode part can be cut, but since an air layer exists between the liquid crystal display device and the touch panel, reflected light is generated at the interface between the bottom surface of the touch panel and the air layer. There is a problem of end.
Further, in order to solve this problem, it has been proposed to perform low reflection processing on the bottom surface of the touch panel in the configurations proposed in Japanese Patent Laid-Open Nos. 2000-321558 and 10-48625. It has been proposed to apply a fluorine resin or a silicon resin, or to form a metal multilayer film by a vacuum deposition method or a sputtering method. In this configuration, it is necessary to provide a low reflection treatment layer on the bottom surface of the touch panel, and the manufacturing process and configuration are complicated.
Further, even in the configurations of Japanese Patent Laid-Open Nos. 10-48625 and 2000-321558, the reflected light on the surface of the liquid crystal display device cannot be cut, and the visibility is deteriorated when external light is incident. There is a problem.
このような問題に鑑みて、本発明は、外光の反射による視認性の低下を防止するタッチパネル付き液晶表示装置をより簡素な構成で提供することを目的とするものである。 In view of such a problem, an object of the present invention is to provide a liquid crystal display device with a touch panel that prevents a decrease in visibility due to reflection of external light with a simpler configuration.
以下に、本発明を説明する。
本発明のタッチパネル付き液晶表示装置の例は、図１に示すように、タッチパネル付き液晶表示装置において、液晶表示装置（１０）側から液晶表示装置表面に実質的に密着させて少なくとも１枚の第一の光学フィルムとして１／４波長板（１１）が貼合され、該液晶表示装置前面に空気層（１２）を介して、タッチパネル透明電極基板（１３）、第二の光学フィルムとして１／４波長板（１４）、偏光板（１５）、の順に配置する構成である。
この構成では、第二の１／４波長板（１４）、偏光板（１５）で反射防止フィルターを形成している。この反射防止フィルターでは外光が偏光板（１５）を透過し直線偏光となり、第二の１／４波長板（１４）を透過することにより円偏光となる。この光の一部は、タッチパネル電極部（１６）で反射し反射光となる。この反射光は、再度、第二の１／４波長板（１４）を透過し、偏光板（１５）の透過軸と垂直な直線偏光となり反射光の大部分は偏光板（１５）に吸収され、タッチパネル電極部（１６）の反射光が抑えられる。
第一の１／４波長板（１１）は、液晶表示装置（１０）からの光を円偏光とし、第二の１／４波長板（１４）を透過した際に直線偏光となるよう配置される。これにより、タッチパネル表示面前面に配置された偏光板（１５）での光吸収を極力避け光の利用効率を高めるために用いられる。
The present invention is described below.
An example of a liquid crystal display device with a touch panel according to the present invention is, as shown in FIG. 1, in the liquid crystal display device with a touch panel, at least one first liquid crystal display device that is substantially closely attached to the liquid crystal display device surface from the liquid crystal display device (10) side. A quarter-wave plate (11) is bonded as one optical film, and the touch panel transparent electrode substrate (13) and 1/4 as a second optical film are provided on the front surface of the liquid crystal display device through an air layer (12). The wavelength plate (14) and the polarizing plate (15) are arranged in this order.
In this configuration, the antireflection filter is formed by the second quarter-wave plate (14) and the polarizing plate (15). In this antireflection filter, external light passes through the polarizing plate (15) to become linearly polarized light, and passes through the second quarter-wave plate (14) to become circularly polarized light. A part of this light is reflected by the touch panel electrode section (16) and becomes reflected light. This reflected light is transmitted again through the second quarter-wave plate (14), becomes linearly polarized light perpendicular to the transmission axis of the polarizing plate (15), and most of the reflected light is absorbed by the polarizing plate (15). The reflected light of the touch panel electrode part (16) is suppressed.
The first quarter-wave plate (11) is arranged so that the light from the liquid crystal display device (10) is circularly polarized and becomes linearly polarized light when transmitted through the second quarter-wave plate (14). The Thereby, it is used in order to avoid the light absorption in the polarizing plate (15) arrange | positioned in the front surface of a touchscreen display surface as much as possible, and to raise the utilization efficiency of light.
従来技術では、図４に示すように、タッチパネル下面に第一の１／４波長板（４１）を密着して配置する。この場合、外光が偏光板（４５）を透過し直線偏光となり、第二の１／４波長板（４４）を透過することにより円偏光となりタッチパネル電極部（４６）を透過し、続いて第一の１／４波長板（４１）を透過することにより直線偏光となる。この光の一部は、タッチパネル最下面で反射し反射光となる。この反射光は、再度、第一の１／４波長板（４１）を透過し円偏光となり、タッチパネル電極部を透過し、続いて第二の１／４波長板（４４）を透過することにより偏光板の透過軸と平行な直線偏光となる。このため、従来技術では、タッチパネル最下面での反射光は偏光板（４５）に吸収されることなく表示面から出射される。このように、従来技術では、タッチパネル電極部（４６）の反射光はカットできるが、タッチパネル最下面の反射光がカットできず視認性が低下してしまう。特開平２０００−３２１５５８号は、タッチパネル最下面に低反射層を配置し、タッチパネル最下面の反射を抑制しようとするものである。 In the prior art, as shown in FIG. 4, the first quarter-wave plate (41) is disposed in close contact with the lower surface of the touch panel. In this case, external light passes through the polarizing plate (45) to become linearly polarized light, passes through the second quarter-wave plate (44), becomes circularly polarized light, passes through the touch panel electrode portion (46), and subsequently The light is linearly polarized by transmitting through one quarter-wave plate (41). A part of this light is reflected by the lowermost surface of the touch panel and becomes reflected light. This reflected light is transmitted again through the first quarter-wave plate (41) to become circularly polarized light, transmitted through the touch panel electrode unit, and then transmitted through the second quarter-wave plate (44). It becomes linearly polarized light parallel to the transmission axis of the polarizing plate. For this reason, in the prior art, the reflected light on the lowermost surface of the touch panel is emitted from the display surface without being absorbed by the polarizing plate (45). Thus, in the prior art, the reflected light of the touch panel electrode part (46) can be cut, but the reflected light on the lowermost surface of the touch panel cannot be cut and visibility is lowered. Japanese Patent Application Laid-Open No. 2000-321558 is intended to suppress reflection on the bottom surface of the touch panel by disposing a low reflection layer on the bottom surface of the touch panel.
一方、本発明では、第一の１／４波長板（１１）をタッチパネル下面ではなく、液晶表示装置（１０）の前面に密着させて配置する。第一の１／４波長板（１１）とタッチパネル最下面には空気層（１２）が形成される。この構成では、外光が入射した場合、タッチパネル最下面で反射する光（第二の偏光板を透過して円偏光となっている）も、タッチパネル電極部（１６）で反射する光と同様に、第二の１／４波長板（１４）を再度透過することにより、偏光板（１５）の透過軸と垂直な直線偏光となり反射光の大部分は偏光板（１５）に吸収され、タッチパネル最下部の反射光が抑えられる。 On the other hand, in the present invention, the first quarter-wave plate (11) is disposed in close contact with the front surface of the liquid crystal display device (10) instead of the lower surface of the touch panel. An air layer (12) is formed on the first quarter-wave plate (11) and the bottom surface of the touch panel. In this configuration, when external light is incident, the light reflected on the lowermost surface of the touch panel (transmitted through the second polarizing plate to be circularly polarized) is the same as the light reflected by the touch panel electrode portion (16). Then, the light passes through the second quarter-wave plate (14) again, so that it becomes linearly polarized light perpendicular to the transmission axis of the polarizing plate (15), and most of the reflected light is absorbed by the polarizing plate (15). Lower reflected light is suppressed.
更に、本発明の構成では、液晶表示装置表面、言い換えれば、第一の１／４波長板表面（１１）で反射する光（第二の偏光板を透過して円偏光となっている）も、タッチパネル電極部（１６）、タッチパネル最下面で反射する光と同様に、第二の１／４波長板（１４）を再度透過することにより、偏光板（１５）の透過軸と垂直な直線偏光となり反射光の大部分は偏光板（１５）に吸収され、液晶表示装置表面の反射光をも抑えることができる。
このような、タッチパネル最下面の反射光をカットする目的、液晶表示装置表面の反射光をカットする目的で、本発明のような液晶表示装置側から液晶表示装置表面に実質的に密着させて少なくとも１枚の第一の光学フィルムないしは光学フィルム積層体が貼合され、該液晶表示装置前面に空気層を介して、タッチパネル透明電極基板、第二の光学フィルム、偏光板、の順に配置する構成に代表されるような、空気層を第一の光学フィルムないしは光学フィルム積層体とタッチパネル間に配置することを明記した事例は確認していない。
Furthermore, in the configuration of the present invention, light reflected by the surface of the liquid crystal display device, in other words, the first quarter-wave plate surface (11) (transmitted through the second polarizing plate to become circularly polarized light) is also used. Similar to the light reflected on the touch panel electrode section (16) and the lowermost surface of the touch panel, it is transmitted again through the second quarter-wave plate (14), thereby linearly polarized light perpendicular to the transmission axis of the polarizing plate (15). Thus, most of the reflected light is absorbed by the polarizing plate (15), and the reflected light on the surface of the liquid crystal display device can be suppressed.
For the purpose of cutting the reflected light on the lowermost surface of the touch panel and for the purpose of cutting the reflected light on the surface of the liquid crystal display device, the liquid crystal display device side as in the present invention is substantially adhered to the surface of the liquid crystal display device at least. 1st optical film thru | or optical film laminated body are bonded, and it is the structure arrange | positioned in order of a touch panel transparent electrode substrate, a 2nd optical film, and a polarizing plate through an air layer in front of this liquid crystal display device. There has not been confirmed a case in which an air layer as typified is disposed between the first optical film or the optical film laminate and the touch panel.
本発明として上記代表例を以って説明したが、この代表例に限定されるものではなく、実施例に示されるような構成が挙げられる。特に、本発明者が提案している特願２００８−２２４２７６号に記載のフィルム構成に本発明を取り入れた実施例３では、車載用表示装置として用い場合には、フロントガラスへの映り込み防止等の機能を付与したまま、反射光の視認性の低下を抑制することができる。
タッチパネルの形式としては、膜抵抗式、静電容量式などあるが特に限定されるものではない。本発明の構成によりタッチパネル最下面の反射光および液晶表示装置表面の反射光をカットすることができる。
Although the present invention has been described with reference to the above representative example, the present invention is not limited to this representative example, and includes the configuration shown in the examples. In particular, in Example 3 in which the present invention is incorporated in the film configuration described in Japanese Patent Application No. 2008-224276 proposed by the present inventor, when used as an in-vehicle display device, it prevents reflection on the windshield, etc. It is possible to suppress a decrease in the visibility of the reflected light while providing the above function.
Examples of the touch panel type include a film resistance type and a capacitance type, but are not particularly limited. With the configuration of the present invention, the reflected light on the lowermost surface of the touch panel and the reflected light on the surface of the liquid crystal display device can be cut.
以下は、本発明の実施例である。
（実施例１）
本発明における第１の実施例を以下に示す。構成の模式図を図１に示す。
液晶表示装置表示面側偏光板の透過軸が水平方向に対して９０°である液晶表示装置（１０）に本発明のタッチパネルを配置することを想定した。膜抵抗式のタッチパネルを模した構成として、２枚のＩＴＯ透明電極（１６）を蒸着したガラス基板（１３）のＩＴＯ蒸着面（１６）を対向させて用いた。液晶表示装置（１０）の表示面に第一の１／４波長板（１１）を遅相軸が４５°となる配置で粘着剤を用いて貼合し密着させた。第一の１／４波長板（１１）を貼合した液晶表示装置（１０）の前面には、空気層（１２）を介してタッチパネルを模した２枚のＩＴＯ透明電極ガラス基板（１３）を配置した。タッチパネルを模した２枚のＩＴＯ透明電極ガラス基板（１３）の前面には、第二の１／４波長板（１４）を遅相軸が１３５°となる配置（第一の１／４波長板とは垂直になる配置）で粘着剤を用いて貼合し密着させ、更に、その前面に偏光板（１５）の透過軸が水平方向９０°となる配置で粘着剤を用いて貼合し密着させた。
この構成で、表示画面を観察したところ、タッチパネル電極部の反射光、タッチパネル最下面の反射光、液晶表示装置表面の反射光がカットされ視認性は良好であった。
The following are examples of the invention.
Example 1
A first embodiment of the present invention is shown below. A schematic diagram of the configuration is shown in FIG.
It was assumed that the touch panel of the present invention is disposed in the liquid crystal display device (10) in which the transmission axis of the liquid crystal display device display surface side polarizing plate is 90 ° with respect to the horizontal direction. As a structure simulating a film resistance touch panel, the ITO vapor deposition surface (16) of the glass substrate (13) on which two ITO transparent electrodes (16) were vapor deposited was used facing each other. The first quarter wave plate (11) was bonded and adhered to the display surface of the liquid crystal display device (10) using an adhesive in an arrangement where the slow axis was 45 °. On the front surface of the liquid crystal display device (10) to which the first quarter-wave plate (11) is bonded, two ITO transparent electrode glass substrates (13) simulating a touch panel with an air layer (12) interposed therebetween. Arranged. On the front surface of two ITO transparent electrode glass substrates (13) simulating a touch panel, a second quarter wavelength plate (14) is disposed with a slow axis of 135 ° (first quarter wavelength plate). And sticking together using an adhesive in a vertical arrangement), and further sticking and sticking using an adhesive in an arrangement where the transmission axis of the polarizing plate (15) is 90 ° in the horizontal direction on the front surface. I let you.
When the display screen was observed with this configuration, the reflected light from the touch panel electrode part, the reflected light from the lowermost surface of the touch panel, and the reflected light from the surface of the liquid crystal display device were cut, and the visibility was good.
（実施例２）
本発明における第２の実施例を以下に示す。構成の模式図を図２に示す。
液晶表示装置表示面側偏光板の透過軸が水平方向に対して９０°である液晶表示装置（２０）に本発明のタッチパネルを配置することを想定した。静電容量式のタッチパネルを模した構成として、ＩＴＯ透明電極（２６）を蒸着したガラス基板（２３）１枚を用いた。液晶表示装置（２０）の表示面に第一の１／４波長板（２１）を遅相軸が４５°となる配置で粘着剤を用いて貼合し密着させた。第一の１／４波長板（２１）を貼合した液晶表示装置（２０）の前面には、空気層（２２）を介してタッチパネルを模したＩＴＯ透明電極ガラス基板（２３）を配置した。タッチパネル裏面には、偏光板（２５）の透過軸が水平方向９０°となる配置で粘着剤を用いて貼合し密着させた、更に、偏光板の裏面（タッチパネルの最下面）には、第二の１／４波長板を（２４）遅相軸が１３５°となる配置（第一の１／４波長板（２１）とは垂直になる配置）で粘着剤を用いて貼合し密着させた。
この構成で、表示画面を観察したところ、タッチパネル電極部の反射光、タッチパネル最下面の反射光、液晶表示装置表面の反射光がカットされ視認性は良好であった。
(Example 2)
A second embodiment of the present invention is shown below. A schematic diagram of the configuration is shown in FIG.
It was assumed that the touch panel of the present invention was arranged in the liquid crystal display device (20) in which the transmission axis of the liquid crystal display device display surface side polarizing plate is 90 ° with respect to the horizontal direction. As a configuration simulating a capacitive touch panel, one glass substrate (23) on which an ITO transparent electrode (26) was deposited was used. The first quarter-wave plate (21) was bonded and adhered to the display surface of the liquid crystal display device (20) using an adhesive in an arrangement where the slow axis was 45 °. An ITO transparent electrode glass substrate (23) imitating a touch panel via an air layer (22) was disposed on the front surface of the liquid crystal display device (20) to which the first quarter-wave plate (21) was bonded. On the back side of the touch panel, the polarizing plate (25) was bonded and adhered using an adhesive in such a manner that the transmission axis was 90 ° in the horizontal direction. Further, on the back side of the polarizing plate (the bottom surface of the touch panel) Two quarter-wave plates (24) are bonded and adhered using an adhesive in an arrangement where the slow axis is 135 ° (position perpendicular to the first quarter-wave plate (21)). It was.
When the display screen was observed with this configuration, the reflected light from the touch panel electrode part, the reflected light from the lowermost surface of the touch panel, and the reflected light from the surface of the liquid crystal display device were cut, and the visibility was good.
（実施例３）
本発明における第３の実施例を以下に示す。構成の模式図を図３に示す。
液晶表示装置表示面側偏光板の透過軸が水平方向に対して１３５°である液晶表示装置（３０）に本発明のタッチパネルを配置することを想定した。タッチパネルを模した構成として、２枚のＩＴＯ透明電極（３６）を蒸着したガラス基板（３３）のＩＴＯ蒸着面（３６）を対向させて用いた。
液晶表示装置装置の表示面に特開２００２−２０２４０９号、特開２００４−１７０５９５号公報に記載された光配向材料を用いて作製した傾斜フィルム〔位相差値１０５．０ｎｍ、傾斜角度２６°〕（３１）を、フィルム面内遅相軸の角度を液晶表示装置の表側偏光板の透過軸と１３５°（水平方向に対して９０°）となるよう粘着剤を用いて貼合し密着させた。次いで、面内位相差値０ｎｍ、フィルム厚み方向の位相差値２２０ｎｍであるＣプレート（３７）を、粘着剤を用いて貼合し密着させた。Ｃプレートを貼合した液晶表示装置の前面には、空気層（３２）を介してタッチパネルを模した２枚のＩＴＯ透明電極ガラス基板（３３）を配置した。タッチパネルを模した２枚のＩＴＯ透明電極ガラス基板（３３）の前面には、第二の１／４波長板（３４）を遅相軸が１４５°となる配置（傾斜フィルム（３１）の遅相軸に対して、遅相軸が５５°になる配置）で粘着剤を用いて貼合し密着させ、更に、その前面に偏光板（３５）の透過軸が水平方向に対して１００°となる配置で粘着剤を用いて貼合し密着させた。
この構成で、表示画面を観察したところ、タッチパネル電極部の反射光、タッチパネル最下面の反射光、液晶表示装置表面の反射光がカットされ視認性は良好であった。
また、この構成のタッチパネル付き液晶表示装置を車両のインスツルメント中央部に配置し、フロントガラスへの映り込みを観察したところ、表示面からの映り込みは大幅に低減されていることが確認された。
Example 3
A third embodiment of the present invention is shown below. A schematic diagram of the configuration is shown in FIG.
It was assumed that the touch panel of the present invention is disposed in the liquid crystal display device (30) in which the transmission axis of the liquid crystal display device display surface side polarizing plate is 135 ° with respect to the horizontal direction. As a configuration simulating a touch panel, an ITO vapor deposition surface (36) of a glass substrate (33) on which two ITO transparent electrodes (36) were vapor deposited was used facing each other.
A tilted film [retardation value 105.0 nm,
When the display screen was observed with this configuration, the reflected light from the touch panel electrode part, the reflected light from the lowermost surface of the touch panel, and the reflected light from the surface of the liquid crystal display device were cut, and the visibility was good.
In addition, a liquid crystal display device with a touch panel with this configuration was placed in the center of the instrument of the vehicle and the reflection on the windshield was observed, confirming that the reflection from the display surface was significantly reduced. It was.
（比較例１）
第１の比較例を以下に示す。構成の模式図を図４に示す。
液晶表示装置表示面側偏光板の透過軸が水平方向に対して９０°である液晶表示装置（４０）に本発明のタッチパネルを配置することを想定した。膜抵抗式のタッチパネルを模した構成として、２枚のＩＴＯ透明電極（４６）を蒸着したガラス基板（４３）のＩＴＯ蒸着面（４６）を対向させて用いた。タッチパネルを模した２枚のＩＴＯ透明電極ガラス基板（４３）を配置した裏面に第一の１／４波長板（４１）を遅相軸が４５°となる配置で粘着剤を用いて貼合し密着させ、タッチパネルを模した２枚のＩＴＯ透明電極ガラス基板（４３）の前面には、第二の１／４波長板（４４）を遅相軸が１３５°となる配置〔第一の１／４波長板（４１）とは垂直になる配置〕で粘着剤を用いて貼合し密着させ、更に、その前面に偏光板（４５）の透過軸が水平方向に対して９０°となる配置で粘着剤を用いて貼合し密着させた。このように第一の１／４波長板（４１）と第２の１／４波長板（４４）と偏光板（４５）を貼合したタッチパネルを模した２枚のＩＴＯ透明電極ガラス基板（４３）を、空気層（４２）を介して液晶表示装置（４０）前面に配置した。
この構成で、表示画面を観察したところ、タッチパネル電極部の反射光はカットされるものの、タッチパネル最下面の反射光、液晶表示装置表面の反射光はカットされておらず視認性が低下していた。
(Comparative Example 1)
A first comparative example is shown below. A schematic diagram of the configuration is shown in FIG.
It was assumed that the touch panel of the present invention was arranged in the liquid crystal display device (40) in which the transmission axis of the liquid crystal display device display surface side polarizing plate was 90 ° with respect to the horizontal direction. As a structure simulating a film resistance type touch panel, an ITO vapor deposition surface (46) of a glass substrate (43) on which two ITO transparent electrodes (46) were vapor deposited was used facing each other. The first quarter-wave plate (41) is bonded to the back surface on which two ITO transparent electrode glass substrates (43) simulating a touch panel are placed using an adhesive in an arrangement where the slow axis is 45 °. A second quarter-wave plate (44) is placed on the front face of two ITO transparent electrode glass substrates (43) imitating the touch panel so that the slow axis is 135 ° [first 1 / In an arrangement in which the transmission axis of the polarizing plate (45) is 90 ° with respect to the horizontal direction on the front surface of the polarizing plate (45). Adhesion was used for adhesion and adhesion. Thus, two ITO transparent electrode glass substrates (43 which imitated the touch panel which bonded the 1st quarter wave plate (41), the 2nd quarter wave plate (44), and the polarizing plate (45). ) Was disposed on the front surface of the liquid crystal display device (40) through the air layer (42).
With this configuration, when the display screen was observed, the reflected light on the touch panel electrode part was cut, but the reflected light on the lowermost surface of the touch panel and the reflected light on the surface of the liquid crystal display device were not cut and visibility was reduced. .
上記本発明の実施例では、タッチパネル電極部の反射光のみカットする比較例１の構成と比較すると、タッチパネル最下面の反射光、液晶表示装置表面の反射光をカットできることから、外光が入射したときでも表示画面の視認性が向上していることが確認された。 In the embodiment of the present invention, compared with the configuration of Comparative Example 1 that cuts only the reflected light of the touch panel electrode portion, the reflected light on the lowermost surface of the touch panel and the reflected light on the surface of the liquid crystal display device can be cut. It has been confirmed that the visibility of the display screen has improved even at times.
本発明では、タッチパネル付き液晶表示装置において、液晶表示装置側から液晶表示装置表面に実質的に密着させて少なくとも１枚の第一の光学フィルムとして１／４波長板ないしは光学フィルム積層体が貼合され、該液晶表示装置前面に空気層を介して、タッチパネル透明電極基板、第二の光学フィルムとして１／４波長板、偏光板、の順に配置する構成とすることによって、タッチパネル最下面の反射光、液晶表示装置表面の反射光をカットするタッチパネル付き液晶表示装置を提供することができる。これにより従来技術の問題点を解決することができる。 In the present invention, in a liquid crystal display device with a touch panel, a quarter-wave plate or an optical film laminate is bonded as at least one first optical film by being substantially adhered to the surface of the liquid crystal display device from the liquid crystal display device side. The reflected light on the bottom surface of the touch panel is configured by arranging the touch panel transparent electrode substrate, the quarter-wave plate as the second optical film, and the polarizing plate in this order through the air layer on the front surface of the liquid crystal display device. A liquid crystal display device with a touch panel that cuts off reflected light from the surface of the liquid crystal display device can be provided. Thereby, the problems of the prior art can be solved.
１０、２０、３０、４０：液晶表示装置
１１、２１、４１：第一１／４波長板
１２、２２、３２、４２：空気層
１３、：タッチパネル透明電極基板（ガラス基板）
１４、２４、３４、４４：第二１／４波長板
１５、２５、３５、４５：偏光板
１６：タッチパネル電極部（ＩＴＯ透明電極、ＩＴＯ蒸着面）
２３、３３、４３：ガラス基板（ＩＴＯ透明電極ガラス基板）
２６、：ＩＴＯ透明電極
３１：傾斜フィルム
３６、４６：ＩＴＯ透明電極（ＩＴＯ蒸着面）
10, 20, 30, 40: Liquid
14, 24, 34, 44: 2nd
23, 33, 43: Glass substrate (ITO transparent electrode glass substrate)
26: ITO transparent electrode 31:
Claims (6)
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| CN109309114A (en) * | 2013-11-12 | 2019-02-05 | 宸鸿光电科技股份有限公司 | Organic Light Emitting Diode touch control display device |
| CN106292039A (en) * | 2016-11-01 | 2017-01-04 | 无锡变格新材料科技有限公司 | Glass is protected in radioprotective low reflective liquid crystal screen protection |
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