JP2015018158A - Liquid crystal display device - Google Patents

Liquid crystal display device Download PDF

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JP2015018158A
JP2015018158A JP2013146249A JP2013146249A JP2015018158A JP 2015018158 A JP2015018158 A JP 2015018158A JP 2013146249 A JP2013146249 A JP 2013146249A JP 2013146249 A JP2013146249 A JP 2013146249A JP 2015018158 A JP2015018158 A JP 2015018158A
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liquid crystal
crystal display
display device
substrate
seal member
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JP6333524B2 (en
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惇 横山
Atsushi Yokoyama
惇 横山
岩本　宜久
Nobuhisa Iwamoto
宜久 岩本
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Stanley Electric Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To suppress display failure by leakage of light in a liquid crystal display device having such a structure that a liquid crystal display panel and a circuit board are connected by an anisotropic conductive material.SOLUTION: The liquid crystal display device includes a liquid crystal panel 1, a printed circuit board 5 disposed on a backside of the panel, a conductive member 4 connecting the liquid crystal panel and the printed circuit board, and a fixing member 2, 2a fixing the liquid crystal panel and the printed circuit board. The liquid crystal panel includes a front substrate, a back substrate, a liquid crystal layer, and a sealing member 19 disposed to enclose the liquid crystal layer. The front substrate has an overhanging part that overhangs outward from the back substrate, and has an electrode part disposed on the overhanging part. The conductive member is interposed between the electrode part of the overhanging part and the printed circuit board. The fixing member has a protruding pressing part 9, 9a that is in contact with the front substrate of the liquid crystal panel, in a region overlapping the sealing member in a plan view and in at least a portion in an extending direction of the sealing member.

Description

本発明は、液晶表示パネルと回路基板とを導電性部材によって電気的に接続する構造を有す液晶表示装置に関する。   The present invention relates to a liquid crystal display device having a structure in which a liquid crystal display panel and a circuit board are electrically connected by a conductive member.

液晶表示パネルと回路基板との間をラバーコネクタと呼ばれる異方性導電材によって電気的に接続した構造を備える液晶表示装置が知られている（例えば、特許文献１参照）。図４（Ａ）は、従来例の液晶表示装置の構造を模式的に示す断面図である。図示の従来例の液晶表示装置は、液晶表示パネル１０１と、その裏面側に配置されたバックライト１０３およびプリント基板１０５と、このプリント基板１０５の電極パットと液晶表示パネル１０１の基板上の電極部とを導通させるために両者間に介在するラバーコネクタ１０４と、液晶表示パネル１０１とバックライト１０３とプリント基板１０５を固定するためのカバー１０２を備える。液晶表示パネル１０１は、基本的に、表側基板１１１と裏側基板１１６の間に液晶層１１３を介在させた構造を有しており、かつ両基板間には液晶層１１３の周囲を封止するためのシール部材１１９が設けられている。カバー１０２は、液晶表示パネル１０１の一面側の端部に接触することによってラバーコネクタ１０４をプリント基板１０５側へ押圧するための押圧部１０２ａを有する。これらの押圧部１０２ａは、図示のように平坦面を有しており、この平坦面をラバーコネクタ１０４に重畳する位置へ接触するように配置される。このとき、多くの場合、各押圧部１０２ａは、ラバーコネクタ１０４に加えて、液晶表示パネル１０１に内在するシール部材１１９に重畳する位置へ接触するように配置される。図４（Ｂ）は、図４（Ａ）に示した従来例の液晶表示装置の表示面法線方向からの外観を模式的に示す平面図である。なお、図４（Ａ）に示した断面図は図４（Ｂ）に示したａ−ａ線方向の断面に対応している。図示のように、液晶表示装置は、プリント基板１０５上に上記のバックライト１０３および液晶表示パネル１０１などを内包したカバー１０２が配置されており、液晶表示パネル１０１の有効表示領域と同等またはこれより大きな領域が開口された構造を有する。   A liquid crystal display device having a structure in which a liquid crystal display panel and a circuit board are electrically connected by an anisotropic conductive material called a rubber connector is known (for example, see Patent Document 1). FIG. 4A is a cross-sectional view schematically showing the structure of a conventional liquid crystal display device. The conventional liquid crystal display device shown in the figure includes a liquid crystal display panel 101, a backlight 103 and a printed circuit board 105 disposed on the back side thereof, an electrode pad of the printed circuit board 105, and an electrode portion on the substrate of the liquid crystal display panel 101. And a cover 102 for fixing the liquid crystal display panel 101, the backlight 103, and the printed board 105 to each other. The liquid crystal display panel 101 basically has a structure in which a liquid crystal layer 113 is interposed between a front substrate 111 and a back substrate 116, and the periphery of the liquid crystal layer 113 is sealed between the substrates. The sealing member 119 is provided. The cover 102 has a pressing portion 102 a for pressing the rubber connector 104 toward the printed circuit board 105 side by contacting an end portion on the one surface side of the liquid crystal display panel 101. These pressing portions 102 a have a flat surface as shown in the figure, and are arranged so as to come into contact with a position where the flat surface is superimposed on the rubber connector 104. At this time, in many cases, each pressing portion 102 a is disposed so as to contact a position overlapping with the seal member 119 present in the liquid crystal display panel 101 in addition to the rubber connector 104. FIG. 4B is a plan view schematically showing the appearance of the conventional liquid crystal display device shown in FIG. 4A from the normal direction of the display surface. Note that the cross-sectional view illustrated in FIG. 4A corresponds to the cross section along the line aa illustrated in FIG. As illustrated, the liquid crystal display device includes a cover 102 including the backlight 103 and the liquid crystal display panel 101 on the printed circuit board 105, and is equivalent to or more effective than the effective display area of the liquid crystal display panel 101. It has a structure in which a large region is opened.

ところで、上記のような液晶表示装置を外部振動負荷の大きい用途（例えば、車載機器や腕時計等）に適用する場合には、液晶表示パネル１０１等の各部品を強固に固定することやラバーコネクタ１０４の接触不良を抑制することを目的として、カバー１０２の押圧部１０２ａをプリント基板１０５側へ向かってより強く押し込む場合がある。例えば、通常用途においては０．５〜１．０ｍｍ程度の押し込み量であるところ、外部振動負荷の大きい用途においては１．０〜１．８ｍｍ程度の押し込み量とする場合がある。ところが、このようにカバー１０２の押圧部１０２ａをより強く押し込んだ場合には、液晶表示パネル１０１において部分的に光抜けに伴う表示ムラが観察される場合がある。この不都合は、液晶表示パネル１０１としてノーマリーブラック型のものを用いている場合において特に顕著に観察される。   By the way, when the liquid crystal display device as described above is applied to an application with a large external vibration load (for example, an in-vehicle device or a wristwatch), each component such as the liquid crystal display panel 101 is firmly fixed or the rubber connector 104 is used. There is a case where the pressing portion 102a of the cover 102 is pushed more strongly toward the printed circuit board 105 for the purpose of suppressing the contact failure. For example, the pushing amount is about 0.5 to 1.0 mm in a normal use, but the pushing amount may be about 1.0 to 1.8 mm in a use having a large external vibration load. However, when the pressing portion 102a of the cover 102 is pushed more strongly in this way, display unevenness due to light leakage may be partially observed in the liquid crystal display panel 101. This inconvenience is particularly observed when a normally black type liquid crystal display panel 101 is used.

特開２０００−２１４７９４号公報JP 2000-214794 A

本発明に係る具体的態様は、液晶表示パネルと回路基板との間を導電性部材によって接続した構造を備える液晶表示装置における光抜けの表示不良を抑制することが可能な技術を提供することを目的の１つとする。   A specific aspect according to the present invention is to provide a technique capable of suppressing a display defect due to light leakage in a liquid crystal display device having a structure in which a liquid crystal display panel and a circuit board are connected by a conductive member. One of the purposes.

本発明に係る一態様の液晶表示装置は、（ａ）液晶パネルと、（ｂ）液晶パネルの裏面側に配置されたプリント基板と、（ｃ）液晶パネルとプリント基板とを接続する導電性部材と、（ｄ）液晶パネルとプリント基板とを固定する固定部材と、を含み、（ｅ）液晶パネルは、各々が４辺を有する矩形状であって対向配置された表側基板及び裏側基板と、表側基板と裏側基板との間に配置された液晶層と、表側基板と裏側基板の間であって表側基板と裏側基板の重なる領域内において液晶層を囲んで設けられたシール部材と、を有し、（ｆ）表側基板は、４辺のうち少なくとも１辺側において裏側基板よりも外側へ張り出した張り出し部と、当該張り出し部の少なくとも一部に設けられた電極部を有し、（ｇ）導電性部材は、張り出し部の電極部とプリント基板の間に挟んで配置され、（ｈ）固定部材は、液晶パネルの表側基板において、シール部材の幅方向における少なくとも一部と平面視において重なる領域であって当該シール部材の延在方向における少なくとも張り出し部の電極部に対応する領域に接触する突起状の押圧部を有する、液晶表示装置である。   A liquid crystal display device according to an aspect of the present invention includes: (a) a liquid crystal panel; (b) a printed circuit board disposed on the back side of the liquid crystal panel; and (c) a conductive member that connects the liquid crystal panel and the printed circuit board. And (d) a fixing member that fixes the liquid crystal panel and the printed circuit board, and (e) the liquid crystal panel is a rectangular shape having four sides, and a front side substrate and a back side substrate that are opposed to each other, and A liquid crystal layer disposed between the front substrate and the back substrate, and a seal member provided between the front substrate and the back substrate and surrounding the liquid crystal layer in a region where the front substrate and the back substrate overlap. And (f) the front substrate has a protruding portion that protrudes outside the back substrate on at least one side of the four sides, and an electrode portion provided on at least a part of the protruding portion, and (g) The conductive member is the electrode of the overhang (H) the fixing member is a region that overlaps at least a part in the width direction of the sealing member in a plan view on the front side substrate of the liquid crystal panel, and the extending direction of the sealing member The liquid crystal display device has a protruding pressing portion that contacts at least a region corresponding to the electrode portion of the overhang portion.

上記構成によれば、液晶表示パネルと回路基板との間を導電性部材によって接続した構造を備える液晶表示装置における光抜けの表示不良を抑制することが可能となる。   According to the above configuration, it is possible to suppress a display defect due to light leakage in a liquid crystal display device having a structure in which a liquid crystal display panel and a circuit board are connected by a conductive member.

上記の液晶表示装置において、押圧部は、液晶パネルの表側基板において、シール部材の幅方向における少なくとも一部と平面視において重なる領域であってシール部材の延在方向における張り出し部の略全体に対応する領域に接触する、ことも好ましい。   In the above-described liquid crystal display device, the pressing portion corresponds to substantially the entire protruding portion in the extending direction of the seal member, which is a region overlapping with at least a portion in the width direction of the seal member in plan view on the front side substrate of the liquid crystal panel. It is also preferable to contact the area to be.

また、上記の液晶表示装置において、押圧部は、液晶パネルの表側基板において、シール部材の幅方向における少なくとも一部と平面視において重なる領域であってシール部材の全周に対応する領域に接触する、ことも好ましい。   Further, in the above liquid crystal display device, the pressing portion is a region that overlaps at least a part in the width direction of the seal member in a plan view on the front substrate of the liquid crystal panel and that corresponds to the entire circumference of the seal member. It is also preferable.

上記の液晶表示装置において、押圧部は、液晶パネルの表側基板において、シール部材の幅方向における全体と平面視において重なる領域に接触する、ことも好ましい。   In the above-described liquid crystal display device, it is also preferable that the pressing portion is in contact with a region overlapping with the entire seal member in the width direction on the front substrate of the liquid crystal panel in plan view.

上記の液晶表示装置において、押圧部は、例えば、テーパー状又は矩形状であり液晶パネルの表側基板に接触する平坦部を有することが好ましい。また、この平坦部は、シール部材の幅方向に対応する幅が当該シール部材の幅の１．４倍以下であることがより好ましい。   In the above liquid crystal display device, the pressing portion preferably has, for example, a taper shape or a rectangular shape and a flat portion that contacts the front substrate of the liquid crystal panel. Further, it is more preferable that the flat portion has a width corresponding to the width direction of the seal member that is not more than 1.4 times the width of the seal member.

図１（Ａ）は、一実施形態の液晶表示装置の構成を示す模式的な断面図である。図１（Ｂ）は、他の実施形態の液晶表示装置の構成を示す模式的な断面図である。FIG. 1A is a schematic cross-sectional view illustrating a configuration of a liquid crystal display device according to an embodiment. FIG. 1B is a schematic cross-sectional view illustrating a configuration of a liquid crystal display device according to another embodiment. 図２は、液晶表示パネルの詳細な構成例を示す模式的な断面図である。FIG. 2 is a schematic cross-sectional view showing a detailed configuration example of the liquid crystal display panel. 図３（Ａ）、図３（Ｂ）、図３（Ｃ）は、それぞれ、押圧部を設ける範囲を説明するための図であり、具体的には液晶表示パネル１の模式的な平面図である。FIG. 3A, FIG. 3B, and FIG. 3C are diagrams for explaining a range in which the pressing portion is provided, specifically, a schematic plan view of the liquid crystal display panel 1. is there. 図４（Ａ）は、従来例の液晶表示装置の構造を模式的に示す断面図である。図４（Ｂ）は、図４（Ａ）に示した従来例の液晶表示装置の表示面法線方向からの外観を模式的に示す平面図である。FIG. 4A is a cross-sectional view schematically showing the structure of a conventional liquid crystal display device. FIG. 4B is a plan view schematically showing the appearance of the conventional liquid crystal display device shown in FIG. 4A from the normal direction of the display surface. 図５（Ａ）および図５（Ｂ）は、上記した図４（Ａ）に示した従来例の液晶表示装置における不具合の原因を説明するための模式的な断面図である。FIGS. 5A and 5B are schematic cross-sectional views for explaining the cause of the problem in the conventional liquid crystal display device shown in FIG. 4A. 図６（Ａ）は、ラバーコネクタの押圧方法について実験した様子を示す模式的な断面図である。図６（Ｂ）は図６（Ａ）の部分的な拡大図である。FIG. 6A is a schematic cross-sectional view showing a state in which an experiment is performed on a rubber connector pressing method. FIG. 6B is a partially enlarged view of FIG.

以下に、本発明の実施の形態について図面を参照しながら説明する。ここでは、まず従来例の液晶表示装置における不具合の原因とそれを解決するための原理（技術的思想）についての本願発明者による検討結果について説明し、その後に、当該原理に基づく本発明の一実施形態について説明する。   Embodiments of the present invention will be described below with reference to the drawings. Here, the cause of the problem in the liquid crystal display device of the conventional example and the result of examination by the inventor about the principle (technical idea) for solving the problem will be described first, and then one embodiment of the present invention based on the principle will be described. Embodiments will be described.

図５（Ａ）および図５（Ｂ）は、上記した図４（Ａ）に示した従来例の液晶表示装置における不具合の原因を説明するための模式的な断面図である。なお、各図では説明の便宜上、基板面の撓みが強調して描かれており、かつ表側基板、裏側基板およびシール部材１１９以外の構成要素については省略している。各図において、液晶表示パネル１０１の表側基板１１１の外部取り出し電極端子部（裏側基板１１６よりも外側に張り出した部分）にカバー１０２の押圧部１０２ａが接触して圧力が加わることにより、表側基板１１１が撓んで湾曲状態となり、液晶層１１３の左右方位における中心部分の隙間（セル厚）が最も厚くなるように変形が生じる。このとき、図５（Ａ）に示すように表側基板１１１の撓みが比較的に小さい場合には、光抜けの不具合がほとんど生じないかあるいは生じたとしても外観上は許容範囲となる。一方、カバー１０２の押圧部１０２ａによる圧力が均等に加わらない場合には、図５（Ｂ）に示すように表側基板１１１の撓みが比較的に大きくなり、セル厚のムラによる光抜けが顕著となる。図５（Ｂ）では液晶層１１３の右側においてセル厚が許容範囲を超えて大きくなっている。このように、表側基板１１１の外部取り出し電極端子部が設けられた張り出し部分に圧力が加わることにより表側基板１１１に撓み現象が生じ、これによりセル厚（液晶層１１３の層厚）に不均一を生じる。そして、このセル厚の不均一がシール部材１１９に近い位置で生じた場合に光抜けが生じやすくなると考えられる。   FIGS. 5A and 5B are schematic cross-sectional views for explaining the cause of the problem in the conventional liquid crystal display device shown in FIG. 4A. In each drawing, for convenience of explanation, the bending of the substrate surface is drawn with emphasis, and components other than the front side substrate, the back side substrate, and the seal member 119 are omitted. In each figure, when the pressing portion 102a of the cover 102 comes into contact with an external extraction electrode terminal portion (a portion protruding outward from the back substrate 116) of the front substrate 111 of the liquid crystal display panel 101, pressure is applied to the front substrate 111. Is deformed so that the gap (cell thickness) at the center in the left-right direction of the liquid crystal layer 113 is the thickest. At this time, as shown in FIG. 5A, in the case where the deflection of the front side substrate 111 is relatively small, even if the problem of light leakage hardly occurs or does occur, the appearance is within an allowable range. On the other hand, when the pressure by the pressing portion 102a of the cover 102 is not evenly applied, the deflection of the front side substrate 111 becomes relatively large as shown in FIG. 5B, and light leakage due to uneven cell thickness is remarkable. Become. In FIG. 5B, the cell thickness is larger than the allowable range on the right side of the liquid crystal layer 113. As described above, the pressure is applied to the protruding portion of the front side substrate 111 where the external extraction electrode terminal portion is provided, thereby causing a deflection phenomenon in the front side substrate 111, thereby causing uneven cell thickness (layer thickness of the liquid crystal layer 113). Arise. It is considered that light leakage is likely to occur when the cell thickness non-uniformity occurs at a position close to the seal member 119.

図６（Ａ）は、ラバーコネクタ１０４の押圧方法について実験した様子を示す模式的な断面図である。図示のように、圧力がかかっていない状態において厚さが６ｍｍで直方体状のラバーコネクタ１０４を平面に配置し、そのラバーコネクタ１０４の上面に表側基板１１１の張り出し部分（端子部）を接触させるようにして液晶表示パネル１０１を配置した。詳細には、図６（Ｂ）の拡大図に示すように、液晶表示パネル１０１の裏側基板１１６の端面から１ｍｍ内側の位置に幅が１．１ｍｍのシール部材１１９を配置した。そして、シール部材１１９の外周壁面の面位置から表側基板１１１の端面に向かって幅１ｍｍの矩形状の加圧用部材１５１を配置した。本例では図示のように表側基板１１１の一面に配置された表側偏光板１１０の上面に加圧用部材１５１を配置した。この加圧用部材１５１の上にこれを均等にプレスできる剛体ガラス１５０を配置した状態で（図５（Ａ）参照）、ラバーコネクタ１０４の厚さが４．２ｍｍに圧縮させるまで圧力を加えた（すなわち、１．８ｍｍの押し込み量）。なお、上記した従来例の液晶表示装置においても同様な圧力を加えた状態で液晶表示パネル１０１とその他の構成部品とが固定されている。   FIG. 6A is a schematic cross-sectional view illustrating a state in which an experiment is performed on a pressing method of the rubber connector 104. As shown in the figure, a rubber connector 104 having a thickness of 6 mm and a rectangular parallelepiped shape is disposed on a flat surface in a state where no pressure is applied, and the protruding portion (terminal portion) of the front substrate 111 is brought into contact with the upper surface of the rubber connector 104. Thus, the liquid crystal display panel 101 was arranged. Specifically, as shown in the enlarged view of FIG. 6B, a seal member 119 having a width of 1.1 mm is disposed at a position 1 mm inside from the end surface of the back substrate 116 of the liquid crystal display panel 101. A rectangular pressing member 151 having a width of 1 mm was disposed from the surface position of the outer peripheral wall surface of the seal member 119 toward the end surface of the front substrate 111. In this example, a pressing member 151 is disposed on the upper surface of the front-side polarizing plate 110 disposed on one surface of the front-side substrate 111 as illustrated. In a state where the rigid glass 150 capable of evenly pressing the pressure member 151 is disposed (see FIG. 5A), pressure is applied until the thickness of the rubber connector 104 is compressed to 4.2 mm (see FIG. 5A). That is, a pushing amount of 1.8 mm). In the above-described conventional liquid crystal display device, the liquid crystal display panel 101 and other components are fixed with the same pressure applied.

剛体ガラス１５０により圧力を加えた状態でこの剛体ガラス１５０を通して液晶表示装置１０１を外観観察した結果、光抜けの不具合を生じないことが確認された。また、加圧用部材１５１の幅を変えて同様の実験を行ったところ、幅１．５ｍｍまでは光抜けの不具合を生じないことが確認された。さらに、加圧用部材１５１がシール部材１１９にオーバーラップした配置や、さらに加圧用部材１５１がシール部材１１９よりも内側まで配置された状態で同様の実験を行ったが特段の相違はなく、光抜けの不具合を生じないことが確認された。また、上記の実験ではシール部材１１９の幅が１．１ｍｍであったがこれを０．８ｍｍとした場合でも同様の実験結果が得られた。また、上記の実験では表側基板１１１および裏側基板１１６として有アルカリガラス（ソーダライムガラス）の１．１ｍｍ厚の基板を用いていたがこれを０．７ｍｍ厚の基板に置き換えた場合でも同様の実験結果が得られた。以上のことから、シール部材１１９のシール幅をｄとしたときに、加圧用部材１５１の幅は概ね１．４ｄ以下であれば、光抜けを生じないと考えられる。次に、この知見に基づいた本発明の一実施形態の液晶表示装置について説明する。   As a result of observing the appearance of the liquid crystal display device 101 through the rigid glass 150 in a state where pressure was applied by the rigid glass 150, it was confirmed that no problem of light leakage occurred. Further, when the same experiment was performed by changing the width of the pressing member 151, it was confirmed that the problem of light leakage did not occur up to a width of 1.5 mm. Further, the same experiment was performed with the pressure member 151 overlapped with the seal member 119 and with the pressure member 151 disposed further to the inner side than the seal member 119, but there was no particular difference. It was confirmed that this problem does not occur. Further, in the above experiment, the width of the seal member 119 was 1.1 mm, but the same experimental result was obtained even when this was 0.8 mm. In the above experiment, an alkali glass (soda lime glass) 1.1 mm thick substrate was used as the front substrate 111 and the back substrate 116, but the same experiment was performed even when this was replaced with a 0.7 mm thick substrate. Results were obtained. From the above, when the seal width of the seal member 119 is d, if the width of the pressing member 151 is approximately 1.4 d or less, it is considered that no light leakage occurs. Next, a liquid crystal display device according to an embodiment of the present invention based on this knowledge will be described.

図１（Ａ）は、一実施形態の液晶表示装置の構成を示す模式的な断面図である。図１（Ａ）に示す実施形態の液晶表示装置は、基本的には上記した従来例の液晶表示装置と同様の構成を備えている。具体的には、液晶表示装置は、液晶表示パネル１と、その裏面側に配置されたバックライト３およびプリント基板５と、このプリント基板５の電極パットと液晶表示パネル１の基板上の電極部とを導通させるために両者間に介在するラバーコネクタ（導電性部材）４と、液晶表示パネル１とバックライト３とプリント基板５を固定するためのカバー（固定部材）２を備える。   FIG. 1A is a schematic cross-sectional view illustrating a configuration of a liquid crystal display device according to an embodiment. The liquid crystal display device of the embodiment shown in FIG. 1A basically has the same configuration as the above-described conventional liquid crystal display device. Specifically, the liquid crystal display device includes a liquid crystal display panel 1, a backlight 3 and a printed circuit board 5 arranged on the back side thereof, an electrode pad of the printed circuit board 5, and an electrode portion on the substrate of the liquid crystal display panel 1. And a cover (fixing member) 2 for fixing the liquid crystal display panel 1, the backlight 3 and the printed board 5 to each other.

図２は、液晶表示パネルの詳細な構成例を示す模式的な断面図である。液晶表示パネル１は、対向配置された各々透明な表側基板１１および裏側基板１６と、表側基板１１の一面に設けられた透明電極１２と、裏側基板１６の一面に設けられた透明電極１５と、表側基板１１と裏側基板１６の各一面の間に設けられた液晶層１３と、表側基板１１と裏側基板１６の各一面の間に介在して基板間距離（セル厚）を保持する機能を有するスペーサー１４と、液晶層１３の周囲を封止するために表側基板１１と裏側基板１６の各一面の間であって各基板の外縁付近に設けられたシール部材１９と、表側基板１１の他面に設けられた偏光板１０と、裏側基板１６の他面に設けられた偏光板１７と、を含んで構成されている。なお、図示を省略しているが各基板の透明電極上にそれぞれ配向膜が設けられていてもよい。この液晶表示パネル１は、表側基板１１の図中の左右両方の張り出し部１８にそれぞれ電極部２０を有している。各電極部２０は、ラバーコネクタ４およびプリント基板５を介して図示しない外部駆動装置から駆動電圧の供給を受け、これを各透明電極１２、１５へ供給するためのものである。この液晶表示パネル１は、例えばノーマリーブラック型の液晶表示パネルである。   FIG. 2 is a schematic cross-sectional view showing a detailed configuration example of the liquid crystal display panel. The liquid crystal display panel 1 includes a transparent front-side substrate 11 and a back-side substrate 16 that are arranged to face each other, a transparent electrode 12 provided on one surface of the front-side substrate 11, a transparent electrode 15 provided on one surface of the back-side substrate 16, The liquid crystal layer 13 provided between each surface of the front side substrate 11 and the back side substrate 16 and the function of interposing between each surface of the front side substrate 11 and the back side substrate 16 to maintain the inter-substrate distance (cell thickness). A spacer 14, a seal member 19 provided between each surface of the front side substrate 11 and the back side substrate 16 to seal the periphery of the liquid crystal layer 13 and in the vicinity of the outer edge of each substrate, and the other side of the front side substrate 11 And a polarizing plate 17 provided on the other surface of the back substrate 16. In addition, although illustration is abbreviate | omitted, the alignment film may be provided on the transparent electrode of each board | substrate, respectively. The liquid crystal display panel 1 has electrode portions 20 on both the left and right projecting portions 18 of the front substrate 11 in the drawing. Each electrode portion 20 is supplied with a drive voltage from an external drive device (not shown) via the rubber connector 4 and the printed circuit board 5 and supplies the drive voltage to the transparent electrodes 12 and 15. The liquid crystal display panel 1 is a normally black liquid crystal display panel, for example.

図１（Ａ）を再び参照すると、カバー２は、液晶表示パネル１の一面側に接触してその部分を押圧するための押圧部９を有する。これらの押圧部９は、図示のようにカバー２の一部をプレス加工する等によって形成されたテーパー形状の突起部であり、例えば高さ、換言すれば周辺部分からの窪みが０．１ｍｍ程度である。なお、押圧部９の形状はテーパー形状に限られず、例えば矩形状、半円形状などの円弧状であってもよい。図示の例の突起部である押圧部９は、平坦面を有しており、この平坦面を液晶表示パネル１のシール部材１９に重ねるようにして配置されている。平坦面の幅はシール部材１９の幅とほぼ等しくされており、例えば０．８ｍｍ程度である。なお、液晶表示パネル１の裏面側はバックライト３と均一に接触している。   Referring to FIG. 1A again, the cover 2 has a pressing portion 9 for contacting and pressing the portion of the liquid crystal display panel 1. These pressing portions 9 are tapered projections formed by, for example, pressing a part of the cover 2 as shown in the figure. For example, the height, in other words, the depression from the peripheral portion is about 0.1 mm. It is. The shape of the pressing portion 9 is not limited to the tapered shape, and may be an arc shape such as a rectangular shape or a semicircular shape. The pressing portion 9, which is a protruding portion in the illustrated example, has a flat surface, and is arranged so that the flat surface overlaps the seal member 19 of the liquid crystal display panel 1. The width of the flat surface is substantially equal to the width of the seal member 19 and is, for example, about 0.8 mm. The back side of the liquid crystal display panel 1 is in uniform contact with the backlight 3.

図１（Ｂ）は、他の実施形態の液晶表示装置の構成を示す模式的な断面図である。図１（Ｂ）に示す実施形態の液晶表示装置は、基本的に上記した図１（Ａ）に示した実施形態の液晶表示装置と同様の構成を備えており、カバーおよび押圧部の構造が異なっている。両者に共通する構成要素については同一符号を用いることでそれらの詳細な説明を省略する。図１（Ｂ）に示す液晶表示装置では、カバー２ａは、液晶表示パネル１の一面側に接触する部分に押圧部９ａを有している。この押圧部９ａは、例えばカバー２ａの裏面に貼り付けられた両面テープによる突起部であり、例えば高さ、換言すればテープ厚が０．１ｍｍ程度である。この突起部である押圧部９ａは、シール部材１９に重ねるようにして配置されており、その幅もシール部材１９とほぼ等しく、例えば０．８ｍｍ程度である。なお、本例においても液晶表示パネル１の裏面側はバックライト３と均一に接触している。   FIG. 1B is a schematic cross-sectional view illustrating a configuration of a liquid crystal display device according to another embodiment. The liquid crystal display device of the embodiment shown in FIG. 1 (B) basically has the same configuration as the liquid crystal display device of the embodiment shown in FIG. 1 (A) described above, and the structure of the cover and the pressing portion is the same. Is different. About the component which is common to both, the detailed description is abbreviate | omitted using the same code | symbol. In the liquid crystal display device shown in FIG. 1B, the cover 2 a has a pressing portion 9 a at a portion that contacts one surface side of the liquid crystal display panel 1. The pressing portion 9a is, for example, a protruding portion made of a double-sided tape attached to the back surface of the cover 2a. For example, the height, in other words, the tape thickness is about 0.1 mm. The pressing portion 9a, which is the protrusion, is arranged so as to overlap the seal member 19, and the width thereof is substantially equal to the seal member 19, for example, about 0.8 mm. In this example as well, the back side of the liquid crystal display panel 1 is in uniform contact with the backlight 3.

図３（Ａ）、図３（Ｂ）、図３（Ｃ）は、それぞれ、押圧部９（または９ａ）を設ける範囲を説明するための図であり、具体的には液晶表示パネル１の模式的な平面図である。図示の例の液晶表示パネル１は、左右方向に長い略長方形状であり、その上端側と下端側のそれぞれにおいて、表側基板１１が裏側基板１６よりも張り出しており、その張り出し部１８の一部に外部接続用の電極部２０がそれぞれ設けられている。また、シール部材１９は、表側基板１１と裏側基板１６の重なる領域の外縁に沿って略環状に設けられており、図中の右側に液晶材料を注入するための注入口２２を有している。この注入口２２は、封止材２１によって塞がれている。このとき、各押圧部９（または９ａ）は、図３（Ａ）に示すように少なくとも外部電極２０が配置される領域のみ対応させてシール部材１９と重ねて設けられてもよいし、図３（Ｂ）に示すように外部電極２０が配置される２辺、すなわち表側基板１１の上端側および下端側の各々においてシール部材１９と重ねて設けられてもよい。さらに、図３（Ｃ）に示すように、各押圧部９（または９ａ）は、一体にしてシール部材１９の全体と重ねるようにして略環状に設けられてもよい。いずれの態様においても、押圧部９とシール部材１９との重なり条件の詳細については、上記した実験結果として示した条件（図６（Ｂ）参照）を採用することが可能である。具体的には、シール部材１９の幅をｄとしたときに、押圧部９（または９ａ）の幅は１．４ｄ以下とすることが好ましい。また、押圧部９（または９ａ）は、その幅方向における少なくとも一部が重なればよく、ほぼ全部がシール部材１９と重なっているとより好ましい。また、この押圧部９（または９ａ）は、実質的にラバーコネクタ４とは重なっていないことが好ましいが、一部重なっていてもよい。   FIG. 3A, FIG. 3B, and FIG. 3C are diagrams for explaining a range in which the pressing portion 9 (or 9a) is provided. Specifically, the liquid crystal display panel 1 is schematically illustrated. FIG. The liquid crystal display panel 1 in the illustrated example has a substantially rectangular shape that is long in the left-right direction, and the front substrate 11 projects from the back substrate 16 on each of the upper end side and the lower end side, and a part of the projecting portion 18 is formed. Are respectively provided with electrode portions 20 for external connection. The seal member 19 is provided in a substantially annular shape along the outer edge of the region where the front substrate 11 and the back substrate 16 overlap, and has an injection port 22 for injecting a liquid crystal material on the right side in the drawing. . The injection port 22 is blocked by the sealing material 21. At this time, as shown in FIG. 3A, each pressing portion 9 (or 9a) may be provided so as to overlap with the seal member 19 so as to correspond to at least the region where the external electrode 20 is disposed. As shown in FIG. 5B, the seal member 19 may be provided on the two sides where the external electrodes 20 are arranged, that is, on the upper end side and the lower end side of the front substrate 11. Further, as shown in FIG. 3C, each pressing portion 9 (or 9 a) may be provided in a substantially annular shape so as to be integrated with the entire seal member 19. In any aspect, for the details of the overlapping condition between the pressing portion 9 and the seal member 19, the condition (see FIG. 6B) shown as the above experimental result can be employed. Specifically, when the width of the seal member 19 is d, the width of the pressing portion 9 (or 9a) is preferably 1.4 d or less. In addition, it is sufficient that at least a part of the pressing portion 9 (or 9a) overlaps in the width direction, and it is more preferable that the entire pressing portion 9 (or 9a) overlaps the seal member 19. Moreover, although it is preferable that this press part 9 (or 9a) does not overlap with the rubber connector 4 substantially, it may overlap partially.

以上のような実施形態によれば、液晶表示パネルと回路基板との間を異方性導電材によって接続した構造を備える液晶表示装置における光抜けの表示不良を抑制することが可能となる。   According to the embodiment as described above, it is possible to suppress a display defect due to light leakage in a liquid crystal display device having a structure in which a liquid crystal display panel and a circuit board are connected by an anisotropic conductive material.

なお、本発明は上述した実施形態の内容に限定されるものではなく、本発明の要旨の範囲内において種々に変形して実施をすることが可能である。例えば、上記した実施形態では液晶表示パネルの裏側にバックライトを配置する例を示していたがバックライトの配置態様はこれに限定されないし、バックライトが省略されてもよい。   In addition, this invention is not limited to the content of embodiment mentioned above, In the range of the summary of this invention, it can change and implement variously. For example, in the above-described embodiment, the example in which the backlight is arranged on the back side of the liquid crystal display panel is shown, but the arrangement mode of the backlight is not limited to this, and the backlight may be omitted.

１：液晶表示パネル
２、２ａ：カバー（固定部材）
３：バックライト
４：ラバーコネクタ（導電性部材）
５：プリント基板
９、９ａ：押圧部
１０、１７：偏光板
１１：表側基板
１２、１５：透明電極
１３：液晶層
１４：スペーサー
１６：裏側基板
１８：張り出し部
１９：シール部材
２０：電極部
２１：封止材
２２：注入口 1: Liquid crystal display panel 2, 2a: Cover (fixing member)
3: Backlight 4: Rubber connector (conductive member)
5: Printed board 9, 9a: Pressing part 10, 17: Polarizing plate 11: Front side board 12, 15: Transparent electrode 13: Liquid crystal layer 14: Spacer 16: Back side board 18: Overhang part 19: Sealing member 20: Electrode part 21 : Sealing material 22: Injection port

Claims (6)

液晶パネルと、
前記液晶パネルの裏面側に配置されたプリント基板と、
前記液晶パネルと前記プリント基板とを接続する導電性部材と、
前記液晶パネルと前記プリント基板とを固定する固定部材と、
を含み、
前記液晶パネルは、
各々が４辺を有する矩形状であって対向配置された表側基板及び裏側基板と、
前記表側基板と前記裏側基板との間に配置された液晶層と、
前記表側基板と前記裏側基板の間であって前記表側基板と前記裏側基板の重なる領域内において前記液晶層を囲んで設けられたシール部材と、
を有し、
前記表側基板は、前記４辺のうち少なくとも１辺側において前記裏側基板よりも外側へ張り出した張り出し部と、当該張り出し部の少なくとも一部に設けられた電極部を有し、
前記導電性部材は、前記張り出し部の前記電極部と前記プリント基板の間に挟んで配置され、
前記固定部材は、前記液晶パネルの前記表側基板において、前記シール部材の幅方向における少なくとも一部と平面視において重なる領域であって当該シール部材の延在方向における少なくとも前記張り出し部の前記電極部に対応する領域に接触する突起状の押圧部を有する、
液晶表示装置。 LCD panel,
A printed circuit board disposed on the back side of the liquid crystal panel;
A conductive member for connecting the liquid crystal panel and the printed circuit board;
A fixing member for fixing the liquid crystal panel and the printed circuit board;
Including
The liquid crystal panel is
A front side substrate and a back side substrate, each of which has a rectangular shape having four sides and is disposed opposite to each other;
A liquid crystal layer disposed between the front substrate and the back substrate;
A seal member provided between the front side substrate and the back side substrate and surrounding the liquid crystal layer in a region where the front side substrate and the back side substrate overlap;
Have
The front-side substrate has a protruding portion that protrudes outward from the back-side substrate on at least one side of the four sides, and an electrode portion provided on at least a part of the protruding portion,
The conductive member is disposed between the electrode part of the projecting part and the printed board,
The fixing member is a region that overlaps at least a part in the width direction of the seal member in a plan view on the front side substrate of the liquid crystal panel, and at least the electrode portion of the protruding portion in the extending direction of the seal member. Having a protruding pressing portion that contacts the corresponding area;
Liquid crystal display device. 前記押圧部は、前記液晶パネルの前記表側基板において、前記シール部材の幅方向における少なくとも一部と平面視において重なる領域であって前記シール部材の延在方向における前記張り出し部の略全体に対応する領域に接触する、
請求項１に記載の液晶表示装置。 The pressing portion is a region overlapping with at least a part in the width direction of the seal member in a plan view on the front side substrate of the liquid crystal panel, and corresponds to substantially the entire protruding portion in the extending direction of the seal member. Touch the area,
The liquid crystal display device according to claim 1. 前記押圧部は、前記液晶パネルの前記表側基板において、前記シール部材の幅方向における少なくとも一部と平面視において重なる領域であって前記シール部材の全周に対応する領域に接触する、
請求項１に記載の液晶表示装置。 The pressing portion is a region that overlaps at least a part in the width direction of the seal member in a plan view on the front side substrate of the liquid crystal panel and is in contact with a region corresponding to the entire circumference of the seal member.
The liquid crystal display device according to claim 1. 前記押圧部は、前記液晶パネルの前記表側基板において、前記シール部材の幅方向における全体と平面視において重なる領域に接触する、
請求項１〜３の何れか１項に記載の液晶表示装置。 The pressing portion is in contact with a region overlapping the whole in the width direction of the sealing member in a plan view on the front side substrate of the liquid crystal panel.
The liquid crystal display device according to claim 1. 前記押圧部は、テーパー状又は矩形状であり前記液晶パネルの前記表側基板に接触する平坦部を有する、
請求項１〜４の何れか１項に記載の液晶表示装置。 The pressing portion is tapered or rectangular and has a flat portion that contacts the front substrate of the liquid crystal panel.
The liquid crystal display device according to claim 1. 前記平坦部は、前記シール部材の幅方向に対応する幅が当該シール部材の幅の１．４倍以下である、
請求項５に記載の液晶表示装置。 The flat portion has a width corresponding to the width direction of the seal member that is not more than 1.4 times the width of the seal member.
The liquid crystal display device according to claim 5.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018037888A1 (en) * 2016-08-23 2018-03-01 日本精機株式会社 Display device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52145787U (en) * 1976-04-27 1977-11-04
JPS5881572U (en) * 1981-11-30 1983-06-02 日本電気ホームエレクトロニクス株式会社 Conductive parts fixing device
US4878738A (en) * 1987-04-27 1989-11-07 Seiko Instruments, Inc. Electro-optical device
JPH02210487A (en) * 1989-02-10 1990-08-21 Konica Corp Liquid crystal display device and production thereof
JPH03241318A (en) * 1990-02-20 1991-10-28 Matsushita Electric Ind Co Ltd Ferrodielectric liquid crystal device
JP2006106063A (en) * 2004-09-30 2006-04-20 Optrex Corp Display apparatus
JP2013101420A (en) * 2011-11-07 2013-05-23 Japan Display West Co Ltd Display device and electronic apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52145787U (en) * 1976-04-27 1977-11-04
JPS5881572U (en) * 1981-11-30 1983-06-02 日本電気ホームエレクトロニクス株式会社 Conductive parts fixing device
US4878738A (en) * 1987-04-27 1989-11-07 Seiko Instruments, Inc. Electro-optical device
JPH02210487A (en) * 1989-02-10 1990-08-21 Konica Corp Liquid crystal display device and production thereof
JPH03241318A (en) * 1990-02-20 1991-10-28 Matsushita Electric Ind Co Ltd Ferrodielectric liquid crystal device
JP2006106063A (en) * 2004-09-30 2006-04-20 Optrex Corp Display apparatus
JP2013101420A (en) * 2011-11-07 2013-05-23 Japan Display West Co Ltd Display device and electronic apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018037888A1 (en) * 2016-08-23 2018-03-01 日本精機株式会社 Display device

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