JP4881030B2 - Display device - Google Patents

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JP4881030B2
JP4881030B2 JP2006041711A JP2006041711A JP4881030B2 JP 4881030 B2 JP4881030 B2 JP 4881030B2 JP 2006041711 A JP2006041711 A JP 2006041711A JP 2006041711 A JP2006041711 A JP 2006041711A JP 4881030 B2 JP4881030 B2 JP 4881030B2
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wiring
substrate
driving
liquid crystal
signal
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JP2007219329A (en
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正行 清宮
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Seiko Instruments Inc
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Seiko Instruments Inc
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Priority to KR1020070015174A priority patent/KR20070082867A/en
Priority to CN2007100841670A priority patent/CN101025495B/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136259—Repairing; Defects
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1345—Conductors connecting electrodes to cell terminals
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136286—Wiring, e.g. gate line, drain line
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136254—Checking; Testing

Description

本発明は、表示装置に関するものである。   The present invention relates to a display device.

従来、携帯電話やノート型パソコン等の表示装置には、薄型で消費電力が少ないといった利点から液晶表示装置が広く用いられていた。   Conventionally, liquid crystal display devices have been widely used for display devices such as mobile phones and laptop computers because of their thinness and low power consumption.

この液晶表示装置は、一般に図４及び図５に示すような構造をしていた。ここで、図４は、液晶表示装置１００を模式的に示す平面図であり、図５は、液晶表示装置１００を模式的に示す部分断面図である。なお、図６は、後述する下側ガラス基板２に亀裂１１７が生じた液晶表示装置を模式的に示す平面図である。   This liquid crystal display device generally has a structure as shown in FIGS. Here, FIG. 4 is a plan view schematically showing the liquid crystal display device 100, and FIG. 5 is a partial cross-sectional view schematically showing the liquid crystal display device 100. FIG. 6 is a plan view schematically showing a liquid crystal display device in which a crack 117 has occurred in the lower glass substrate 2 described later.

すなわち、液晶表示装置１００は、図４及び図５に示すように、下側ガラス基板１０１と上側ガラス基板１０２との間に液晶（図示略）が封入され表示部として機能する液晶パネル１０３と、液晶パネル１０３を駆動する液晶駆動用集積回路（以下、駆動用ＩＣと称す）１０４と、液晶パネル１０３を照明するためのバックライトの光源として用いるＬＥＤ１０５と、ＬＥＤ１０５が発する光を液晶パネル１０３全面に導く導光体１０６を備えている。なお、図５に示すように、下側ガラス基板１０１と上側ガラス基板１０２との間に封止した液晶の漏れ出しを防ぐためにシール材１１８が設けられている。   That is, as shown in FIGS. 4 and 5, the liquid crystal display device 100 includes a liquid crystal panel 103 in which liquid crystal (not shown) is sealed between a lower glass substrate 101 and an upper glass substrate 102 and functions as a display unit, A liquid crystal driving integrated circuit (hereinafter referred to as a driving IC) 104 for driving the liquid crystal panel 103, an LED 105 used as a light source of a backlight for illuminating the liquid crystal panel 103, and the light emitted from the LED 105 on the entire surface of the liquid crystal panel 103 A light guide 106 is provided. As shown in FIG. 5, a sealing material 118 is provided to prevent leakage of liquid crystal sealed between the lower glass substrate 101 and the upper glass substrate 102.

また、下側ガラス基板１０１には、透明導電性薄膜（以下、ＩＴＯ膜と称す）からなる複数本の信号電極（以下、セグメント電極」と称す）１０７が縞状に形成されており、上側ガラス基板１０２の下面には、同じくＩＴＯ膜からなる複数本の走査電極（以下、コモン電極１０８と称す）がセグメント電極１０７と直交するように形成されている。   The lower glass substrate 101 is formed with a plurality of signal electrodes (hereinafter referred to as segment electrodes) 107 made of a transparent conductive thin film (hereinafter referred to as ITO film) in stripes, and the upper glass substrate 101 On the lower surface of the substrate 102, a plurality of scanning electrodes (hereinafter referred to as common electrodes 108) that are also made of an ITO film are formed so as to be orthogonal to the segment electrodes 107.

各セグメント電極１０７は、下側ガラス基板１０１上に形成された信号線１０９により駆動用ＩＣ１０４に接続され、各コモン電極１０８も同じく下側ガラス基板１０１上に形成された信号線１０９と、この信号線１０９に接続され下側ガラス基板１０１と上側ガラス基板１０２との間を導通させる上下ガラス導通材１１０と、各上下ガラス導通材１１０とコモン電極１０８とを接続する信号線１０９とにより駆動用ＩＣ１０４に接続されている。また、これら各信号線１０９は、各セグメント電極１０７及び各コモン電極１０８と同様にＩＴＯ膜により形成されている。また、駆動用ＩＣ１０４は、下側ガラス基板１０１上に形成されているＩＴＯ膜からなる信号線１０９によりフレキシブル基板１１１と接続され、このフレキシブル基板１１１に形成されている配線により、図示しない制御部と接続されている。同様に、バックライト用ＬＥＤ１０５もフレキシブル基板１１１に形成されている配線によって制御部と接続されている。   Each segment electrode 107 is connected to the driving IC 104 by a signal line 109 formed on the lower glass substrate 101, and each common electrode 108 is also connected to the signal line 109 formed on the lower glass substrate 101 and this signal. The driving IC 104 includes an upper and lower glass conducting material 110 connected to the line 109 and conducting between the lower glass substrate 101 and the upper glass substrate 102, and a signal line 109 connecting each upper and lower glass conducting material 110 and the common electrode 108. It is connected to the. Each of these signal lines 109 is formed of an ITO film in the same manner as each segment electrode 107 and each common electrode 108. The driving IC 104 is connected to a flexible substrate 111 by a signal line 109 made of an ITO film formed on the lower glass substrate 101, and a control unit (not shown) is connected to the flexible substrate 111 by wiring formed on the flexible substrate 111. It is connected. Similarly, the backlight LED 105 is also connected to the control unit by wiring formed on the flexible substrate 111.

そして、液晶パネル１０３の平面視において、セグメント電極１０７とコモン電極１０８とが交差している各交差点により表示画像の各画素を構成し、この各画素群により液晶パネル１０３上の表示領域１１２を構成していた。   Then, in the plan view of the liquid crystal panel 103, each pixel of the display image is constituted by each intersection where the segment electrode 107 and the common electrode 108 intersect, and each pixel group constitutes the display area 112 on the liquid crystal panel 103. Was.

このように構成した液晶表示装置１００では、バックライト用ＬＥＤ１０５を発光させた状態で、制御回路から入力される制御信号により駆動用ＩＣ１０４を駆動させ、駆動用ＩＣ１０４から各セグメント電極１０７及び各コモン電極１０８に所定のタイミングで入力される駆動信号により、所望のセグメント電極１０７とコモン電極１０８との間に所定の電位差を生じさせ、電位差が生じている部分のセグメント電極１０７とコモン電極１０８との交差点に位置する液晶の方向を変化させることにより、各画素部分の輝度を調節して表示領域１１２内に画像を表示させるようにしていた。   In the liquid crystal display device 100 configured as described above, the driving IC 104 is driven by the control signal input from the control circuit in a state where the backlight LED 105 is caused to emit light, and each segment electrode 107 and each common electrode is driven from the driving IC 104. A predetermined potential difference is generated between the desired segment electrode 107 and the common electrode 108 by a drive signal input to the segment 108 at a predetermined timing, and an intersection of the segment electrode 107 and the common electrode 108 in a portion where the potential difference is generated. By changing the direction of the liquid crystal positioned at, the luminance of each pixel portion is adjusted to display an image in the display area 112.

また、この液晶表示装置１００は、駆動用ＩＣ１０４と液晶パネル１０３とを接続している信号線１０９を衝撃から保護するシリコン材１１３と、上側ガラス基板１０２及び下側ガラス基板１０１の周縁部や駆動用ＩＣ１０４を衝撃から保護するために液晶パネル１０３の表示領域１１２外周縁を被覆する金属フレーム１１４とを備え、これらシリコン材１１３と金属フレーム１１４とにより機械的強度を向上させていた（例えば、特許文献１参照）。なお、図５に示すように、駆動用ＩＣ１０４への光の入射を防止する遮光テープ１１５と、導光体１０６を支持する導光体フレーム１１６が設けられている。
特開平１０−１３３２１９号公報 In addition, the liquid crystal display device 100 includes a silicon material 113 that protects a signal line 109 connecting the driving IC 104 and the liquid crystal panel 103 from an impact, peripheral portions of the upper glass substrate 102 and the lower glass substrate 101, and driving. In order to protect the IC 104 from impact, a metal frame 114 covering the outer peripheral edge of the display area 112 of the liquid crystal panel 103 is provided, and the mechanical strength is improved by the silicon material 113 and the metal frame 114 (for example, patents) Reference 1). As shown in FIG. 5, a light shielding tape 115 that prevents light from entering the driving IC 104 and a light guide frame 116 that supports the light guide 106 are provided.
Japanese Patent Laid-Open No. 10-133219

ところが上述した従来の液晶表示装置は、駆動用ＩＣ１０４を衝撃から保護するための金属フレーム１１４を備えていたため、駆動用ＩＣ１０４と液晶パネル１０３とを接続する信号線１０９の断線に起因した不具合が発生した場合、その原因を調べるには非常に煩雑な作業を行わなければならなかった。すなわち、上記した液晶表示装置のように、シリコン材１１３や金属フレーム１１４を備えた液晶表示装置１００であっても、使用中の振動や衝撃によりガラス基板が破損するおそれがある。特に、下側ガラス基板１０１において、駆動用ＩＣ１０４と液晶パネル１０３とを接続している信号線１０９が形成されている部分は、上側ガラス基板１０２と重なり合っていない部分であるため強度が低く、図６に示すように、その角部から亀裂１１７が入るおそれがあった。   However, since the above-described conventional liquid crystal display device includes the metal frame 114 for protecting the driving IC 104 from an impact, a problem caused by the disconnection of the signal line 109 that connects the driving IC 104 and the liquid crystal panel 103 occurs. In such a case, it was necessary to perform very complicated work to investigate the cause. That is, even in the liquid crystal display device 100 including the silicon material 113 and the metal frame 114 as in the liquid crystal display device described above, the glass substrate may be damaged by vibration or impact during use. In particular, in the lower glass substrate 101, the portion where the signal line 109 that connects the driving IC 104 and the liquid crystal panel 103 is formed is a portion that does not overlap the upper glass substrate 102, so that the strength is low. As shown in FIG. 6, there was a possibility that the crack 117 might enter from the corner.

このように、下側ガラス基板１０１において駆動用ＩＣ１０４が配置されている部分の角部に亀裂１１７が入ると、駆動用ＩＣ１０４と液晶パネル１０３とを接続している信号線１０９が断線してしまい、駆動用ＩＣ１０４から液晶パネル１０３に駆動信号を入力することができなくなり、表示領域１１２に画像を表示することができないといった不具合が生じる。しかし、上記のようにこの信号線１０９の断線部分は金属フレーム１１４により覆われているため、外部から断線を確認することができず、不具合の原因を調べるには金属フレーム１１４を液晶パネル１０３から取外し、さらに、下側ガラス基板１０１の亀裂１１７及び微細な信号線１０９の断線を目視により確認しなければならず、その作業が煩雑であった。   As described above, when the crack 117 is formed at the corner portion of the lower glass substrate 101 where the driving IC 104 is disposed, the signal line 109 connecting the driving IC 104 and the liquid crystal panel 103 is disconnected. As a result, it becomes impossible to input a driving signal from the driving IC 104 to the liquid crystal panel 103 and an image cannot be displayed in the display area 112. However, as described above, the disconnection portion of the signal line 109 is covered with the metal frame 114, so that the disconnection cannot be confirmed from the outside, and the metal frame 114 is removed from the liquid crystal panel 103 in order to investigate the cause of the malfunction. Further, the crack 117 of the lower glass substrate 101 and the disconnection of the fine signal line 109 had to be visually confirmed, which was complicated.

そこで、本発明では、情報を表示する表示部と、表示部を駆動する駆動信号を入力する配線部とを有する表示装置において、配線部における信号線が断線した際、共に断線する断線検知用配線を有することを特徴とする。   Accordingly, in the present invention, in a display device having a display unit for displaying information and a wiring unit for inputting a drive signal for driving the display unit, when the signal line in the wiring unit is disconnected, the disconnection detection wiring that is disconnected together. It is characterized by having.

本発明では、情報を表示する表示部と、表示部を駆動する駆動信号を入力する配線部とを有する表示装置において、配線部における信号線が断線した際、共に断線する断線検知用配線を有することを特徴とするため、信号線自体の断線を直接目視により確認することなく容易に確認でき、信号線の断線による表示装置の不具合の原因を煩雑な作業を行うことなく検知することができる。   In the present invention, in a display device having a display unit for displaying information and a wiring unit for inputting a drive signal for driving the display unit, when a signal line in the wiring unit is disconnected, the disconnection detection wiring is disconnected. Therefore, the disconnection of the signal line itself can be easily confirmed without directly visual confirmation, and the cause of the malfunction of the display device due to the disconnection of the signal line can be detected without performing complicated work.

本発明の表示装置は、表示部を駆動するための駆動信号を入力する複数の配線が形成された基板を備えており、複数の配線のうち両端部の信号線の少なくとも一方の信号線が断線した際に、共に断線する断線検知用配線が基板上に形成されている。さらに、この断線検知用配線は、両端部の信号線のうち一方の信号線に沿って該信号線よりも基板の外側に位置するように設けられた第一の検出用配線と、他方の信号線に沿って該信号線よりも基板の外側に位置するように設けられた第二の検出用配線と、基板の上方に設けられた絶縁体上に形成され、第一の検出用配線と第二の検出用配線を電気的に接続する導通配線を含んでいる。そして、第一の検出用配線と電気的に接続する第一の断線検知用端子と、第二の検出用配線と電気的に接続する第二の断線検知用端子を備え、第一の断線検知用端子と第二の断線検知用端子間の抵抗値に基づいて、信号線の断線を検知可能としている。   The display device of the present invention includes a substrate on which a plurality of wirings for inputting drive signals for driving the display portion are formed, and at least one of the signal lines at both ends of the plurality of wirings is disconnected. In this case, a disconnection detection wiring that is disconnected together is formed on the substrate. Further, the disconnection detection wiring includes a first detection wiring provided so as to be positioned on the outer side of the substrate along one signal line among the signal lines at both ends, and the other signal. A second detection wiring provided so as to be positioned on the outside of the substrate along the line with respect to the signal line, and a first detection wiring and a first detection wiring formed on an insulator provided above the substrate. A conduction wiring for electrically connecting the two detection wirings is included. The first disconnection detection terminal includes a first disconnection detection terminal electrically connected to the first detection wiring and a second disconnection detection terminal electrically connected to the second detection wiring. The disconnection of the signal line can be detected based on the resistance value between the terminal for use and the second disconnection detection terminal.

ここで、絶縁体は基板に対向するように設けられた対向基板であり、基板と対向基板の間には、第一の検出用配線と導通配線を接続する導電材と、第二の検出用配線と導通配線を接続する導電材を備えている。   Here, the insulator is a counter substrate provided so as to face the substrate. Between the substrate and the counter substrate, a conductive material connecting the first detection wiring and the conductive wiring, and a second detection A conductive material for connecting the wiring and the conductive wiring is provided.

基板にはフレキシブル基板が接続され、第一及び第二の断線検知用端子がこのフレキシブル基板に形成されている。また、基板には駆動信号を出力するドライバＩＣが実装されており、前述の複数の配線はドライバＩＣの出力端子に接続されている。   A flexible substrate is connected to the substrate, and first and second disconnection detection terminals are formed on the flexible substrate. A driver IC that outputs a drive signal is mounted on the substrate, and the plurality of wirings described above are connected to output terminals of the driver IC.

このように、本発明に係る表示装置は、画像情報や文字情報等の情報を表示する表示部と、この表示部を駆動するための駆動信号を当該表示部に入力する信号線が形成された配線部とを備えている。そして、この表示装置は、衝撃等による配線部における信号線の断線に起因した表示部の不具合を検知するための断線検知用配線を備えている。この断線検知用配線は、信号線が断線した場合に、信号線と共に断線するように構成しており、この断線検知用配線の導通状態を検査することにより、信号線の断線を検知することができるものである。そのため、信号線自体の断線を直接目視により確認することなく容易に検知でき、信号線の断線による表示装置の不具合の原因を煩雑な作業を行うことなく検知することができる。   As described above, the display device according to the present invention includes a display unit that displays information such as image information and character information, and a signal line that inputs a drive signal for driving the display unit to the display unit. And a wiring section. The display device includes a disconnection detection wiring for detecting a defect in the display unit due to a disconnection of the signal line in the wiring unit due to an impact or the like. This disconnection detection wiring is configured to be disconnected together with the signal line when the signal line is disconnected, and the disconnection of the signal line can be detected by inspecting the conduction state of the disconnection detection wiring. It can be done. Therefore, it is possible to easily detect the disconnection of the signal line itself without directly visual confirmation, and it is possible to detect the cause of the malfunction of the display device due to the disconnection of the signal line without performing complicated work.

また、断線検知用配線は、信号線において断線の生じ易い一部分に沿って、又は、信号線全体に沿って配設することにより、信号線が断線した際に同時に断線するように構成している。さらに、この断線検知用配線は、その基端側と終端側とのそれぞれに断線検知用配線の断線を検知することにより、信号線の断線を検知可能とした断線検知用端子を備えている。そして、上記断線の検査を行う場合には、この一対の断線検知用端間に断線検知用の所定の電圧を印加し、そのときの断線検知用端子間の導通抵抗値に基づいて断線しているか否かを判断するようにしている。すなわち、断線検知用端子間に所定の電圧を印加した結果、断線検知用端端子間の導通抵抗値が無限大になった場合に断線していると判断することができ、断線検知用端子間の導通抵抗値が非常に低い所定値（断線検知用配線の材料、形状により決定される固有の値）であった場合に断線していないと判断することができる。   Further, the disconnection detection wiring is arranged along a part of the signal line where breakage is likely to occur or along the entire signal line so that the signal line is disconnected at the same time when the signal line is disconnected. . Further, the disconnection detection wiring is provided with a disconnection detection terminal capable of detecting the disconnection of the signal line by detecting the disconnection of the disconnection detection wiring on each of the base end side and the terminal end side. When performing the disconnection inspection, a predetermined voltage for disconnection detection is applied between the pair of disconnection detection ends, and disconnection is performed based on the conduction resistance value between the disconnection detection terminals at that time. Judgment is made whether or not. That is, as a result of applying a predetermined voltage between the disconnection detection terminals, when the conduction resistance value between the disconnection detection end terminals becomes infinite, it can be determined that there is a disconnection between the disconnection detection terminals. It is possible to determine that no disconnection occurs when the conduction resistance value is a predetermined value (a unique value determined by the material and shape of the disconnection detection wiring).

このように、一対の断線検知用端子間に所定の電圧を印加するだけで、目視によらず容易に信号線の断線を検知することができる。また、断線検知用端子は、表示部に駆動信号を入力する配線部と接続されているフレキシブル基板に設けるようにしている。フレキシブル基板は、可撓性を有するため、このフレキシブル基板に断線検知用配線を設けることにより、表示装置の筐体内部において断線検知用配線の取り回しの自由度が向上し、表示装置を分解しなくても断線を検査するための電圧を印加できる箇所に断線検知用端子を設けることができるので、信号線の断線を容易に検知することができるようになる。   In this way, the disconnection of the signal line can be easily detected without visual observation only by applying a predetermined voltage between the pair of disconnection detection terminals. Further, the disconnection detection terminal is provided on a flexible substrate connected to a wiring portion for inputting a drive signal to the display portion. Since the flexible substrate has flexibility, by providing a wire for detecting disconnection on the flexible substrate, the degree of freedom in handling the wire for detecting disconnection within the housing of the display device is improved, and the display device is not disassembled. However, since the disconnection detection terminal can be provided at a location where a voltage for inspecting the disconnection can be applied, the disconnection of the signal line can be easily detected.

また、表示部は、透光性を有する２枚のガラス基板間に液晶を封止した液晶表示手段を備えており、この表示部における表示領域よりも外側に断線検知用配線を設けるようにしている。そのため、断線検知用配線が液晶表示手段により表示する画像を阻害することがない。しかも、断線検知用配線は、液晶を封止しているガラス基板の周縁近傍に配設するようにしており、ガラス基板の破損に起因して信号線が断線したことを、断線検知用配線の断線により間接的に検知するようにしているので、液晶を封止している基板において、比較的衝撃に弱い基板周縁部の破損を検知することができ、その破損に起因した信号線の断線を容易かつ確実に検知することができる表示装置を提供する。   In addition, the display unit includes liquid crystal display means in which liquid crystal is sealed between two light-transmitting glass substrates, and a disconnection detection wiring is provided outside the display region in the display unit. Yes. Therefore, the disconnection detection wiring does not disturb the image displayed by the liquid crystal display means. Moreover, the disconnection detection wiring is arranged in the vicinity of the periphery of the glass substrate sealing the liquid crystal, and the signal line disconnection due to the breakage of the glass substrate is indicated by the disconnection detection wiring. Since it is detected indirectly by disconnection, it is possible to detect damage to the peripheral edge of the substrate that is relatively vulnerable to shocks in the substrate sealing the liquid crystal, and disconnect the signal line due to the damage. Provided is a display device that can be easily and reliably detected.

以下、本発明に係る表示装置の実施例について、図面を参照して具体的に説明する。なお、ここでは表示装置として透過型の液晶表示装置を例に挙げて説明するが、本発明はこれに限定されるものではなく、反射型の液晶表示装置、プラズマディスプレイ、有機ＥＬディスプレイなど、情報を表示する表示部と、表示部を駆動する駆動信号を入力する配線部とを有する任意の表示装置に適用することができる。   Embodiments of a display device according to the present invention will be specifically described below with reference to the drawings. Here, a transmissive liquid crystal display device will be described as an example of a display device, but the present invention is not limited to this, and information such as a reflective liquid crystal display device, a plasma display, an organic EL display, etc. It can be applied to an arbitrary display device having a display unit for displaying the image and a wiring unit for inputting a drive signal for driving the display unit.

図１及び図３は、本実施例の液晶表示装置を模式的に示す平面図であり、図２はその部分断面図である。図１及び図２に示すように、本実施例の液晶表示装置１は、下側ガラス基板２と上側ガラス基板３との間に液晶（図示略）が封入され表示部として機能する液晶パネル４と、液晶パネル４を駆動する駆動用ＩＣ５と、液晶パネル４を照明発光するためのバックライトの光源として用いるＬＥＤ６と、ＬＥＤ６が発する光を液晶パネル４全面に導く導光体７とを備えている。また、下側ガラス基板２には、透明導電性薄膜からなる複数本のセグメント電極８が縞状に配置されており、上側ガラス基板３の下面には、複数本のコモン電極９がセグメント電極８とそれぞれ直交する向きに配置されている。なお、図２に示すように、下側ガラス基板２と上側ガラス基板３との間に封止している液晶が漏れ出すことを防ぐためにシール材２４が設けられている。   1 and 3 are plan views schematically showing the liquid crystal display device of this embodiment, and FIG. 2 is a partial sectional view thereof. As shown in FIGS. 1 and 2, the liquid crystal display device 1 according to the present embodiment includes a liquid crystal panel 4 that functions as a display unit with liquid crystal (not shown) sealed between a lower glass substrate 2 and an upper glass substrate 3. A driving IC 5 for driving the liquid crystal panel 4, an LED 6 used as a light source of a backlight for illuminating the liquid crystal panel 4, and a light guide 7 for guiding the light emitted from the LED 6 to the entire surface of the liquid crystal panel 4. Yes. In addition, a plurality of segment electrodes 8 made of a transparent conductive thin film are arranged in a striped pattern on the lower glass substrate 2, and a plurality of common electrodes 9 are arranged on the lower surface of the upper glass substrate 3. Are arranged in directions orthogonal to each other. As shown in FIG. 2, a sealing material 24 is provided to prevent the liquid crystal sealed between the lower glass substrate 2 and the upper glass substrate 3 from leaking.

また、ここでは、説明を簡単にするため図示を省略しているが、上側ガラス基板３とコモン電極９との間には、上層から順に特定色の光だけを透過させるカラーフィルタと、カラーフィルタを保護する保護膜とが設けられており、コモン電極９と液晶との間には液晶を配向するための配向膜が設けられ、カラーフィルタの画素間にはブラックマトリックス呼ばれる遮光膜が設けられている。   Although not shown here for the sake of simplicity, a color filter that transmits only light of a specific color in order from the upper layer is provided between the upper glass substrate 3 and the common electrode 9, and a color filter. Is provided between the common electrode 9 and the liquid crystal, and an alignment film for aligning the liquid crystal is provided between the pixels of the color filter. Yes.

また、液晶とセグメント電極８との間にも配向膜が設けられており、下側ガラス基板２と導光体７との間には、プリズムシートと偏光板とが設けられている。そして、セグメント電極８とコモン電極９との間には、液晶層の厚さ（セルギャップ）を制御するスペーサが設けられている。各セグメント電極８は、下側ガラス基板２上に形成された信号線１０により駆動用ＩＣ５に接続されている。各コモン電極９も、上側ガラス基板３上に形成された信号線１０と、この信号線１０に接続され上側ガラス基板３と下側ガラス基板２との間を導通させる導通材１１と、この導通材１１と下側ガラス基板２条に形成された信号線１０により駆動用ＩＣ５に接続されている。   An alignment film is also provided between the liquid crystal and the segment electrode 8, and a prism sheet and a polarizing plate are provided between the lower glass substrate 2 and the light guide 7. A spacer that controls the thickness (cell gap) of the liquid crystal layer is provided between the segment electrode 8 and the common electrode 9. Each segment electrode 8 is connected to the driving IC 5 by a signal line 10 formed on the lower glass substrate 2. Each common electrode 9 also has a signal line 10 formed on the upper glass substrate 3, a conductive material 11 connected to the signal line 10 and conducting between the upper glass substrate 3 and the lower glass substrate 2, and this conduction The signal line 10 formed on the material 11 and the lower glass substrate 2 is connected to the driving IC 5.

これら駆動用ＩＣ５と各セグメント電極８とを接続している各信号線１０、及び、駆動用ＩＣ５と各導通材１１とを接続している各信号線１０、及び、各導通材１１と各コモン電極９とを接続している各信号線１０は、全てセグメント電極８及びコモン電極９と同様にＩＴＯ膜により形成している。そして、駆動用ＩＣ５と各セグメント電極８とを接続している信号線１０と、駆動用ＩＣ５と各コモン電極９とを接続している信号線１０とが形成されている部分が、液晶表示装置１において、液晶パネル４に駆動信号を入力する配線部として機能する部分である。また、駆動用ＩＣ５は、当該駆動用ＩＣ５を挟んで液晶パネル４と逆側の下側ガラス基板２上に形成されたＩＴＯ膜からなる信号線１０によって、フレキシブル基板１２と接続され、このフレキシブル基板１２に形成されている配線によって、図示しない制御部と接続されている。同様に、ＬＥＤ６もフレキシブル基板１２に形成されている配線によって制御部と接続されている。   Each signal line 10 connecting the driving IC 5 and each segment electrode 8, each signal line 10 connecting the driving IC 5 and each conducting material 11, and each conducting material 11 and each common Each signal line 10 connected to the electrode 9 is formed of an ITO film in the same manner as the segment electrode 8 and the common electrode 9. A portion where the signal line 10 connecting the driving IC 5 and each segment electrode 8 and the signal line 10 connecting the driving IC 5 and each common electrode 9 are formed is a liquid crystal display device. 1, a portion that functions as a wiring portion that inputs a drive signal to the liquid crystal panel 4. The driving IC 5 is connected to the flexible substrate 12 by a signal line 10 made of an ITO film formed on the lower glass substrate 2 opposite to the liquid crystal panel 4 with the driving IC 5 interposed therebetween. 12 is connected to a control unit (not shown) by wiring formed in the circuit 12. Similarly, the LED 6 is also connected to the control unit by wiring formed on the flexible substrate 12.

そして、液晶パネル４の平面視において、セグメント電極８とコモン電極９とが交差している各交差点により表示画像の各画素を構成し、この各画素群により液晶パネル４上の表示領域１３を構成している。このように構成した液晶表示装置１は、バックライト用ＬＥＤ６を発光させた状態で、制御回路から入力される制御信号により駆動用ＩＣ５を駆動させ、駆動用ＩＣ５から各セグメント電極８及び各コモン電極９に所定のタイミングで入力される駆動信号により、所望のセグメント電極８とコモン電極９との間に所定の電位差を生じさせ、電位差が生じている部分のセグメント電極８とコモン電極９との交差点に位置する液晶の方向を変化させることにより、各画素部分の輝度を調節して表示領域１３内に画像を表示させるパッシブ駆動方式の表示装置である。   Then, in the plan view of the liquid crystal panel 4, each pixel of the display image is constituted by each intersection where the segment electrode 8 and the common electrode 9 intersect, and the display region 13 on the liquid crystal panel 4 is constituted by each pixel group. is doing. In the liquid crystal display device 1 configured as described above, the driving IC 5 is driven by the control signal input from the control circuit in a state where the backlight LED 6 emits light, and each segment electrode 8 and each common electrode is driven from the driving IC 5. 9 generates a predetermined potential difference between the desired segment electrode 8 and the common electrode 9 by a drive signal input at a predetermined timing, and an intersection of the segment electrode 8 and the common electrode 9 in a portion where the potential difference is generated This is a passive drive type display device that displays the image in the display area 13 by adjusting the luminance of each pixel portion by changing the direction of the liquid crystal positioned in the area.

また、この液晶表示装置１は、駆動用ＩＣ５と液晶パネル４とを接続している信号線１０を衝撃から保護するシリコン材１４と、上側ガラス基板３及び下側ガラス基板２の周縁部や駆動用ＩＣ５を衝撃から保護するために液晶パネル４の表示領域１３外周縁を被覆する金属フレーム１５とを備え、これらシリコン材１４と金属フレーム１５とにより機械的強度を向上させている。なお、図２に示すように、駆動用ＩＣ５への光の入射を防止する遮光テープ１６と、導光体７を支持する導光体フレーム１７が設けられている。   In addition, the liquid crystal display device 1 includes a silicon material 14 that protects the signal line 10 that connects the driving IC 5 and the liquid crystal panel 4 from an impact, the peripheral portions of the upper glass substrate 3 and the lower glass substrate 2, and driving. In order to protect the IC 5 from impact, a metal frame 15 covering the outer peripheral edge of the display area 13 of the liquid crystal panel 4 is provided, and the mechanical strength is improved by the silicon material 14 and the metal frame 15. As shown in FIG. 2, a light shielding tape 16 that prevents light from entering the driving IC 5 and a light guide frame 17 that supports the light guide 7 are provided.

そして、この液晶表示装置１は、駆動用ＩＣ５から液晶パネル４へ駆動信号を入力するための信号線１０が断線した場合に、その断線を検知するための断線検知用配線１８を備えている。この断線検知用配線１８は、図１に示すように、下側ガラス基板２において駆動用ＩＣ５と導通材１１を接続している信号線１０に沿って配設された第１断線検知部１９ａ及び第２断線検知部１９ｂと、上側ガラス基板３においてこれら第１断線検知部１９ａ及び第２断線検知部１９ｂの各端部に設けている導通材１１ａ同士を接続する連絡部２０と、各断線検知部１９ａ、１９ｂに接続され、フレキシブル基板１２上に形成される第１金属配線２１ａ及び第２金属配線２１ｂにより構成している。なお、説明の便宜上、第１金属配線２１ａ側を基端側とし、第２金属配線２１ｂ側を終端側として説明する。   The liquid crystal display device 1 includes a disconnection detection wiring 18 for detecting disconnection when the signal line 10 for inputting a drive signal from the driving IC 5 to the liquid crystal panel 4 is disconnected. As shown in FIG. 1, the disconnection detection wiring 18 includes a first disconnection detection unit 19 a disposed along the signal line 10 connecting the driving IC 5 and the conductive material 11 in the lower glass substrate 2, and The second disconnection detecting unit 19b, the connecting part 20 for connecting the conductive materials 11a provided at the end portions of the first disconnection detecting unit 19a and the second disconnection detecting unit 19b in the upper glass substrate 3, and each disconnection detection The first metal wiring 21 a and the second metal wiring 21 b are connected to the portions 19 a and 19 b and formed on the flexible substrate 12. For convenience of explanation, the first metal wiring 21a side is described as the base end side, and the second metal wiring 21b side is described as the termination side.

このように、第１断線検知部１９ａ及び第２断線検知部１９ｂにおける断線検知用配線１８は、下側ガラス基板２において駆動用ＩＣ５から液晶パネル４に駆動信号を入力する信号線１０に沿って基板の外側に配設しているので、この断線検知用配線１８に沿って配設されている信号線１０が断線した際に、同時に断線することとなる（図３参照）。そのため、この第１断線検知部１９ａ及び第２断線検知部１９ｂにおける断線検知用配線１８が断線しているか否かを検出することによって、信号線１０が断線しているか否かを間接的に検知することができる。   In this way, the disconnection detection wiring 18 in the first disconnection detection unit 19a and the second disconnection detection unit 19b is along the signal line 10 that inputs the drive signal from the driving IC 5 to the liquid crystal panel 4 in the lower glass substrate 2. Since it is disposed outside the substrate, when the signal line 10 disposed along the disconnection detection wiring 18 is disconnected, it is disconnected simultaneously (see FIG. 3). Therefore, it is indirectly detected whether or not the signal line 10 is disconnected by detecting whether or not the disconnection detection wiring 18 in the first disconnection detection unit 19a and the second disconnection detection unit 19b is disconnected. can do.

また、第１金属配線２１ａ及び第２金属配線２１ｂは、図示しない制御部から駆動用ＩＣ５へ制御信号を入力する配線が形成されたフレキシブル基板１２に設けるようにしており、その端部に断線を検知するための所定電圧が印加される第１断線検知用端子２２ａと第２断線検知用端子２２ｂとを備えている。また、フレキシブル基板１２は、可撓性を有しており、図２に示すように、その一端側が下側ガラス基板２の上面に形成している信号線１０により駆動用ＩＣ５を介して液晶パネル４と接続され、その他端側が液晶表示装置１の下面側に折り曲げられた状態となっている。そして、折り曲げられたフレキシブル基板１２の内周面に断線検知用配線１８の一部である第１金属配線２１ａと第２金属配線２１ｂを形成すると共に、液晶表示装置１の下面側におけるフレキシブル基板１２の外周面に、第１断線検知用端子２２ａと第２断線検知用端子２２ｂとを設け、これら第１断線検知用端子２２ａ及び第２断線検知用端子２２ｂと断線検知用配線１８とを、フレキシブル基板１２を貫通させたスルーホールにより接続するようにしている。   In addition, the first metal wiring 21a and the second metal wiring 21b are provided on the flexible substrate 12 on which wiring for inputting a control signal from a control unit (not shown) to the driving IC 5 is formed. A first disconnection detection terminal 22a and a second disconnection detection terminal 22b to which a predetermined voltage for detection is applied are provided. Further, the flexible substrate 12 has flexibility, and as shown in FIG. 2, a liquid crystal panel is connected via a driving IC 5 by a signal line 10 having one end formed on the upper surface of the lower glass substrate 2. 4, and the other end side is bent to the lower surface side of the liquid crystal display device 1. Then, the first metal wiring 21 a and the second metal wiring 21 b that are part of the disconnection detection wiring 18 are formed on the inner peripheral surface of the bent flexible substrate 12, and the flexible substrate 12 on the lower surface side of the liquid crystal display device 1. The first disconnection detection terminal 22a and the second disconnection detection terminal 22b are provided on the outer peripheral surface of the first disconnection detection terminal 22a, and the first disconnection detection terminal 22a, the second disconnection detection terminal 22b, and the disconnection detection wiring 18 are flexible. The connection is made through a through hole penetrating the substrate 12.

ここで、この液晶表示装置１において駆動用ＩＣ５と液晶パネル４とを接続している信号線１０が断線しているか否かの検知を行う方法について説明する。まず、任意の２端子間に所定の電圧を印加して、その２端子間の導通抵抗値を測定可能なテスター（図示略）を用意する。そして、このテスターが備える一対のテスト用端子の一方を第１断線検知用端子２２ａに接続すると共に、他方を第２断線検知用端子２２ｂに接続する。その後、一対のテスト用端子間に所定の電圧を印加し、そのときの第１断線検知用端子２２ａと第２断線検知用端子２２ｂとの間の導通抵抗値を測定する。このとき、図１に示すように、駆動用ＩＣ５と液晶パネル４とを接続している信号線１０が切断していない場合に、テスターによる測定結果は断線検知用配線１８が備える固有の抵抗値となる。一方、図３に示すように、下側ガラス基板２の角部に亀裂２３が生じたことにより、断線検知用配線１８と信号線１０とが共に断線している場合に、テスターによる測定結果は無限大となる。   Here, a method for detecting whether or not the signal line 10 connecting the driving IC 5 and the liquid crystal panel 4 in the liquid crystal display device 1 is disconnected will be described. First, a tester (not shown) capable of measuring a conduction resistance value between two terminals by applying a predetermined voltage between any two terminals is prepared. Then, one of the pair of test terminals provided in the tester is connected to the first disconnection detection terminal 22a, and the other is connected to the second disconnection detection terminal 22b. Thereafter, a predetermined voltage is applied between the pair of test terminals, and the conduction resistance value between the first disconnection detection terminal 22a and the second disconnection detection terminal 22b at that time is measured. At this time, as shown in FIG. 1, when the signal line 10 connecting the driving IC 5 and the liquid crystal panel 4 is not cut, the measurement result by the tester is a specific resistance value included in the disconnection detection wiring 18. It becomes. On the other hand, as shown in FIG. 3, when both the disconnection detection wiring 18 and the signal line 10 are disconnected due to the occurrence of cracks 23 at the corners of the lower glass substrate 2, the measurement result by the tester is Become infinite.

このように、この液晶表示装置１では、下側ガラス基板２の破損に起因した微細な信号線１０の断線を、目視ではなくテスターが検出する第１断線検知用端子２２ａと第２断線検知用端子２２ｂとの間の導通抵抗値により容易に検出することができる。しかも、上記のように、断線検知用配線１８の基端側に第１断線検知用端子２２ａを設けると共に、断線検知用配線１８の終端側に第２断線検知用端子２２ｂを設け、この第１断線検知用端子２２ａ及び第２断線検知用端子２２ｂを液晶表示装置1の下面側に配置しているため、テスターのテスト用端子を、第１断線検知用端子２２ａと第２断線検知用端子２２ｂとに接続する際には、液晶パネル４から金属フレーム１５を取外す作業を要しないので、断線検知作業を容易に行うことができる。   As described above, in the liquid crystal display device 1, the first disconnection detection terminal 22 a and the second disconnection detection are detected by the tester, not by visual inspection, of the disconnection of the fine signal line 10 caused by the breakage of the lower glass substrate 2. It can be easily detected by the conduction resistance value between the terminal 22b. In addition, as described above, the first disconnection detection terminal 22a is provided on the base end side of the disconnection detection wiring 18, and the second disconnection detection terminal 22b is provided on the terminal end side of the disconnection detection wiring 18, and this first Since the disconnection detection terminal 22a and the second disconnection detection terminal 22b are disposed on the lower surface side of the liquid crystal display device 1, the test terminals of the tester are the first disconnection detection terminal 22a and the second disconnection detection terminal 22b. When connecting to, it is not necessary to remove the metal frame 15 from the liquid crystal panel 4, so the disconnection detection work can be easily performed.

また、ここでは、下側ガラス基板２において、上側ガラス基板３と重なり合っておらず機械的強度が比較的低い部分に、選択的に断線検知用配線１８の第１断線検知部１９ａ及び第２断線検知部１９ｂを設けることによって断線検知用配線１８の長さを可及的に短くし、これにより、この液晶表示装置１の製造コストが増大することを抑制している。   Further, here, in the lower glass substrate 2, the first disconnection detection unit 19 a and the second disconnection of the disconnection detection wiring 18 are selectively provided in a portion that does not overlap with the upper glass substrate 3 and has a relatively low mechanical strength. By providing the detection unit 19b, the length of the disconnection detection wiring 18 is shortened as much as possible, thereby suppressing an increase in the manufacturing cost of the liquid crystal display device 1.

以上説明してきたように、本発明によれば、表示部の不具合の原因が基板の破損による信号線の断線であるか否かを、煩雑な作業を要することなく、容易、且つ、迅速に判断することができ、しかも、上記した変形例のように、基板周縁部の破損も検出することができる。   As described above, according to the present invention, it is possible to easily and quickly determine whether or not the cause of the malfunction of the display unit is the disconnection of the signal line due to the breakage of the substrate without requiring a complicated operation. Moreover, it is also possible to detect damage to the peripheral edge of the substrate as in the above-described modification.

なお、本実施例では、パッシブ駆動方式の表示装置を具体例として挙げたが、アクティブ駆動方式の表示装置に適用可能であることはいうまでもない。   In this embodiment, the passive drive type display device is described as a specific example, but it is needless to say that the present invention can be applied to an active drive type display device.

本実施例の液晶表示装置を模式的に示す平面図である。It is a top view which shows typically the liquid crystal display device of a present Example. 本実施例の液晶表示装置を示す部分断面図である。It is a fragmentary sectional view which shows the liquid crystal display device of a present Example. 本実施例の液晶表示装置を説明する平面図である。It is a top view explaining the liquid crystal display device of a present Example. 従来の液晶表示装置を模式的に示す平面図である。It is a top view which shows the conventional liquid crystal display device typically. 従来の液晶表示装置を模式的に示す断面図である。It is sectional drawing which shows the conventional liquid crystal display device typically. 従来の液晶表示装置を模式的に示す平面図である。It is a top view which shows the conventional liquid crystal display device typically.

符号の説明Explanation of symbols

１ 液晶表示装置
２ 下側ガラス基板
３ 上側ガラス基板
４ 液晶パネル
５ 駆動用ＩＣ
６ バックライト用ＬＥＤ
７ 導光体
８ セグメント電極
９ コモン電極
１０ 信号線
１１、１１ａ 導通材
１２ フレキシブル基板
１３ 表示領域
１４ シリコン材
１５ 金属フレーム
１６ 遮光テープ
１７ 導光体フレーム
１８ 断線検知用配線
１９ａ 第１断線検知部
１９ｂ 第２断線検知部
２０ 連絡部
２１ａ 第１金属配線
２１ｂ 第２金属配線
２２ａ 第１断線検知用端子
２２ｂ 第２断線検知用端子
２３ 亀裂 DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 2 Lower glass substrate 3 Upper glass substrate 4 Liquid crystal panel 5 Driving IC
6 Backlight LED
7 Light guide body 8 Segment electrode 9 Common electrode 10 Signal line 11, 11a Conductive material 12 Flexible substrate 13 Display area 14 Silicon material 15 Metal frame 16 Light shielding tape 17 Light guide body frame 18 Disconnection detection wiring 19a First disconnection detection portion 19b 2nd disconnection detection part 20 Contact part 21a 1st metal wiring 21b 2nd metal wiring 22a 1st disconnection detection terminal 22b 2nd disconnection detection terminal 23 Crack

Claims (3)

第一の表示電極が形成された基板と、第二の表示電極が形成された対向基板と、前記基板と前記対向基板の間に設けられた液晶層を備え、前記第一の表示電極と前記第二の表示電極により表示部を構成する表示装置において、
前記基板には、前記表示部を駆動するための第一駆動信号と第二駆動信号を出力する駆動用ＩＣが実装され、前記第一駆動信号と前記第二駆動信号のいずれか一方の駆動信号が供給される信号線が複数本形成され、
前記基板には、複数本の前記信号線のうち一方の側の最も外側に位置する信号線に沿って該信号線よりも前記基板の外側に設けられた第一の検出用配線と、複数本の前記信号線のうち他方の側の最も外側に位置する信号線に沿って該信号線よりも前記基板の外側に設けられた第二の検出用配線が形成されるとともに、前記第一の検出用配線と前記第二の検出用配線は前記基板上では電気的に独立しており、
前記基板に形成された複数本の前記信号線は、前記第一駆動信号が供給される第一信号配線と前記第二駆動信号が供給される第二信号配線を含み、
前記対向基板には、前記第二の表示電極に前記第二駆動信号を供給するための導通配線が形成され、
前記第二信号配線と前記導通配線を接続する導通材が、前記基板と前記対向基板との間隙に配列されており、
前記対向基板には、前記第一の検出用配線と前記第二の検出用配線を電気的に接続する連結配線が、前記表示部の前記駆動用ＩＣ側の外方に形成され、
前記基板と前記対向基板との間隙に、前記第一の検出用配線と前記連結配線を接続する第一導電材と、前記第二の検出用配線と前記連結配線を接続する第二導電材を備えるとともに、前記第一導電材と前記第二導電材は前記導通材より前記駆動用ＩＣ側に配置され、
前記第一の検出用配線と前記連結配線と前記第二の検出用配線の配線経路の抵抗値に基づいて、前記信号線の断線を検知可能としたことを特徴とする表示装置。 A substrate on which a first display electrode is formed; a counter substrate on which a second display electrode is formed; and a liquid crystal layer provided between the substrate and the counter substrate, the first display electrode and the In the display device that forms the display unit by the second display electrode,
A driving IC that outputs a first driving signal and a second driving signal for driving the display unit is mounted on the substrate, and one of the first driving signal and the second driving signal is mounted. Is formed with a plurality of signal lines,
The substrate includes a first detection wiring provided on the outer side of the substrate along the signal line located on the outermost side on one side of the plurality of signal lines, and a plurality of the detection lines. A second detection wiring provided on the outer side of the substrate with respect to the signal line located on the outermost side of the other of the signal lines, and the first detection Wiring and the second detection wiring are electrically independent on the substrate,
The plurality of signal lines formed on the substrate include a first signal wiring to which the first driving signal is supplied and a second signal wiring to which the second driving signal is supplied,
Conductive wiring for supplying the second drive signal to the second display electrode is formed on the counter substrate,
A conductive material connecting the second signal wiring and the conductive wiring is arranged in a gap between the substrate and the counter substrate;
On the counter substrate, a connection wiring for electrically connecting the first detection wiring and the second detection wiring is formed on the outside of the display unit on the driving IC side,
A first conductive material connecting the first detection wiring and the connection wiring, and a second conductive material connecting the second detection wiring and the connection wiring in a gap between the substrate and the counter substrate; And the first conductive material and the second conductive material are disposed on the driving IC side from the conductive material,
A display device characterized in that disconnection of the signal line can be detected based on resistance values of wiring paths of the first detection wiring, the connection wiring, and the second detection wiring . 前記基板には前記信号線を保護するためのシリコン材が前記駆動用ＩＣの周囲に設けられたことを特徴とする請求項１に記載の表示装置。 The display device according to claim 1, wherein a silicon material for protecting the signal line is provided on the substrate around the driving IC . 前記基板に接続されたフレキシブル基板を備え、
前記フレキシブル基板には、前記第一の検出用配線と電気的に接続する第一の断線検知用端子と、前記第二の検出用配線と電気的に接続する第二の断線検知用端子が形成されたことを特徴とする請求項１または２に記載の表示装置。 Comprising a flexible substrate connected to the substrate;
The flexible substrate has a first disconnection detection terminal electrically connected to the first detection wiring and a second disconnection detection terminal electrically connected to the second detection wiring. the display device according to claim 1 or 2, characterized in that it is.
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