JP3863543B2 - Liquid crystal display - Google Patents

Description

  The present invention relates to a liquid crystal display device in which a light modulation layer is held between a pair of electrode substrates, and more particularly to a structure that enables a narrow frame.

  2. Description of the Related Art In recent years, flat display devices represented by liquid crystal display devices are variously used as display devices such as personal computers and word processors, as TV display devices, and as projection-type display devices by taking advantage of thin, lightweight, and low power consumption. Used in the field.

  In particular, active matrix display devices, in which a three-terminal nonlinear element is electrically connected as a switching element to each pixel electrode, can achieve a good display image with no crosstalk between adjacent pixels, and are actively researched and developed. Has been done.

  Hereinafter, a light transmission type active matrix liquid crystal display device will be described as an example, and its configuration will be briefly described. In an active matrix liquid crystal display device, an array substrate and a counter substrate are arranged to face each other with a predetermined gap therebetween via a sealing material, and a light modulation layer made of a liquid crystal composition is held in this gap via an alignment film. Configured.

  In the array substrate, a plurality of signal lines and a plurality of scanning lines are arranged in a matrix on a glass substrate, and thin film transistors (hereinafter abbreviated as TFTs) arranged as switch elements in the vicinity of each intersection. A pixel electrode made of ITO (Indium Tin Oxide) is provided. Further, on this glass substrate, an auxiliary capacitance line substantially parallel to the scanning line is disposed, and an auxiliary capacitance line and the pixel electrode are formed so that an auxiliary capacitance (Cs) is formed between the auxiliary capacitance line and the pixel electrode. An insulating film is interposed between them.

  The counter substrate is configured such that a matrix-shaped light shielding film for shielding light from the periphery of the TFT and the pixel electrode is disposed on a glass substrate, and a counter electrode made of ITO is disposed thereon via an insulating film. The counter electrode is electrically connected to the array substrate via a transfer formed by dispersing conductive particles such as silver particles in a resin.

  The array substrate is electrically connected to a drive circuit substrate that supplies various drive voltages via FPC (Flexible Print Circuit) or TAB (Tape Automated Bonding) in which drive elements are arranged on a flexible wiring substrate. Or a drive element is mounted directly on the array substrate.

  By the way, in a liquid crystal display device represented by the above-described active matrix liquid crystal display device, it is required to set a display area larger than the external dimensions of the device. For example, in a personal computer having an A4 size external dimension, in order to secure a larger display area, a liquid crystal display device having a large display area with respect to the specified apparatus external dimension is required.

  In order to satisfy such a requirement, it is naturally necessary to make the peripheral area smaller than the effective display area. For example, in Japanese Patent Laid-Open No. 4-178630, a seal material stop having a step along the seal region is provided between the effective display region and the seal region, so that the effective display region is affected by the outflow of the seal material. A technique for preventing this is disclosed. According to this, the interval between the effective display area and the seal area can be reduced, and thus the display area can be set larger than the external dimensions of the apparatus, but it is not sufficient yet.

  Further, in response to the above requirements, it is conceivable to reduce the width of the sealing material or reduce the area of the array substrate outside the sealing region itself. However, if the width of the sealing material is narrowed, the adhesive strength between the array substrate and the counter substrate due to the sealing material decreases, and the sealing material itself peels from the substrate, or a thin film on which the sealing material is deposited on the array substrate or the counter substrate is removed. The problem of peeling with it arises.

  Furthermore, in order to make the array substrate area itself outside the seal region small, it is necessary to scribe and remove unnecessary substrates near the seal region to form an array substrate. However, if the sealing material oozes outward, when the substrate is scribed, a manufacturing yield is reduced due to a scribing failure in which an undesired cut surface is formed along the oozing sealing material.

  The present invention has been made in response to the above-described technical problems, and an object of the present invention is to provide a liquid crystal display device in which a reduction in the outer dimensions of the display area is achieved.

  Another object of the present invention is to provide a liquid crystal display device having a small sealing material width and sufficiently suppressed peeling of the sealing material. Another object of the present invention is to provide a liquid crystal display device in which the sealing material is prevented from seeping out from the sealing region, thereby reducing the substrate area outside the sealing region.

A liquid crystal display device according to an aspect of the present invention includes:
A first electrode substrate including a display region in which pixel electrodes are disposed, a seal region disposed around the display region, and a single wiring disposed in the seal region along the seal region When,
A second electrode substrate having a counter electrode to which a voltage is supplied through the wiring, disposed opposite to the first electrode substrate with a predetermined gap, and bonded to the first electrode substrate in the seal region;
A light modulation layer held between the first electrode substrate and the second electrode substrate,
The wiring for supplying a voltage to the counter electrode has a plurality of openings arranged along the longitudinal direction of the seal region.

  According to the liquid crystal display device of the present invention, the plurality of wirings arranged substantially parallel to each other along the seal region are arranged on the first substrate corresponding to the seal region. However, the effective connection area between the first electrode substrate and the sealing material increases due to the influence of the step caused by the wiring described above. For this reason, even if the sealing material width is narrowed, peeling of the sealing material is reduced. In addition, since the sealing material is bonded to the first electrode substrate in the region where the wiring exists and in the region where the wiring does not exist, a plurality of wirings are provided even if the wiring is inferior in adhesion to the other. Since it is formed in the book, peeling of the sealing material is sufficiently prevented.

  If the wiring arranged in the seal region is used for supplying the driving voltage to the second electrode substrate, there is no need to separately form a power supply wiring outside the sealing material. The external dimensions can be further reduced. Further, if at least one of the wirings is disposed between the seal region and the display region, the spread of the seal material to the display region can be suppressed, and the seal region can be disposed close to the display region. The external dimensions of the device can be further reduced.

  If the connecting member is located outside the sealing region, the wiring is divided into a plurality of thin lines and extends to the connecting member through the sealing region. As a result, the amount of the sealing material flowing out along the wiring can be suppressed, and even if the peripheral area is reduced in size, it does not cause scribe failure of the substrate. The above-described wiring is formed in the same process as the signal line or the scanning line, so that the manufacturing process is not increased, and therefore, the productivity equivalent to the conventional one can be ensured.

  A liquid crystal display device according to another aspect of the present invention is as follows.

  (A) The first electrode substrate and the second electrode substrate are disposed to face each other via a sealing material disposed in the seal region, and are provided with a light modulation layer between the first and second electrode substrates and surrounded by the seal region. In the liquid crystal display device in which the display region is formed, a plurality of wirings substantially parallel to each other are arranged along the seal region on the first electrode substrate corresponding to the seal region. Liquid crystal display device.

  (B) The liquid crystal display device according to (a), wherein at least one of the wirings is disposed between the seal region and the display region.

  (C) The wiring and the second electrode substrate are electrically connected by a connecting member disposed between the first electrode substrate and the second electrode substrate, and the wiring is connected to the second electrode substrate. A driving voltage is supplied from the liquid crystal display device according to (a).

  (D) The connection member is disposed between the first electrode substrate and the second electrode substrate outside the seal region, and the wiring extends to the connection member via the seal region. The liquid crystal display device according to (c), comprising a wiring.

  (E) The liquid crystal display device according to (d), wherein the extended wiring is divided into a plurality of fine lines.

  (F) The first electrode substrate includes a signal line and a scanning line, a switch element connected to the signal line and the scanning line, and a pixel electrode connected to the switch element, and the wiring is the signal line or the The liquid crystal display device according to (a), which is formed in the same process as the scanning line.

  (G) The first electrode substrate and the second electrode substrate are disposed to face each other via a sealing material disposed in the seal region, and are provided with a light modulation layer between the first and second electrode substrates and surrounded by the seal region. In the liquid crystal display device in which the display area is formed, the electrode wiring led out from the display area of the first electrode substrate through the seal area is divided into a plurality of fine lines. A characteristic liquid crystal display device.

  (H) The electrode wiring and the second electrode substrate are electrically connected by a connecting member disposed between the first electrode substrate and the second electrode substrate, and the second electrode substrate includes The liquid crystal display device according to (g), wherein a driving voltage is supplied from a plurality of wirings.

  (I) The first electrode substrate is opposed to a signal line and a scanning line, a switch element connected to the signal line and the scanning line, a pixel electrode connected to the switch element, and the pixel electrode through an insulating film The liquid crystal display device according to (g), wherein the electrode wiring is electrically connected to the auxiliary capacitance line.

  (J) a pixel electrode region composed of a plurality of pixel electrodes arranged in a matrix, a seal region surrounding the pixel electrode region, an array substrate including a peripheral region outside the seal region, and a counter electrode facing the pixel electrode A counter substrate provided with: a seal material disposed in the seal region and facing the array substrate and the counter substrate with a desired gap; and light modulation held in the gap between the array substrate and the counter substrate A connecting member that is disposed between the array substrate and the counter substrate and electrically connects the counter electrode voltage supply wiring and the counter electrode; In the liquid crystal display device, the connection member is disposed adjacent to or adjacent to two opposite sides of the array substrate, and the counter electrode supply wiring is Between serial connection member is wired in the sealing area liquid crystal display device, characterized in that electrical connection.

  (K) The liquid crystal display device according to (j), wherein the counter electrode supply wiring includes a plurality of thin wires.

  (L) The liquid crystal display device according to (k), wherein at least one of the thin lines is disposed between the seal region and the pixel electrode region.

  (M) The liquid crystal according to (j), wherein the array substrate includes a signal line and a scanning line, a switch element connected to the signal line and the scanning line, and a pixel electrode connected to the switch element. Display device.

  (N) The signal line is drawn only to the first end side of the array substrate, and the scanning line is drawn only to the second end side adjacent to the first end side of the array substrate. The liquid crystal display device according to (m).

  (O) The one connecting member is disposed on the first end side of the array substrate, and the other connecting member is disposed on the third end side facing the first end side of the array substrate. The liquid crystal display device according to (n), wherein

  (P) The one connection member is disposed in the peripheral region on the first end side of the array substrate, and the other connection member is disposed in the peripheral region on the third end side of the array substrate, The liquid crystal display device according to (o), wherein the counter electrode supply wiring includes an extending portion extending from the seal region to the one connection member and the other connection member in the peripheral region.

  (Q) The liquid crystal display device according to (p), wherein the extension portion of the counter electrode supply wiring is divided into a plurality of thin lines.

  (R) The one connection member is disposed on the first end side of the array substrate, and the other connection member is disposed on the second end side adjacent to the first end side of the array substrate. The liquid crystal display device according to (n), wherein

  (S) The one connection member is disposed in the peripheral region on the first end side of the array substrate, and the other connection member is disposed in the peripheral region on the second end side of the array substrate, The liquid crystal display device according to (r), wherein the counter electrode supply wiring includes an extending portion extending from the seal region to the one connection member and the other connection member in the peripheral region.

  (T) The liquid crystal display device according to (s), wherein the extension portion of the counter electrode supply wiring is divided into a plurality of thin lines.

  (U) The one connecting member is disposed on the second end side of the array substrate, and the other connecting member is disposed on the fourth end side facing the second end side of the array substrate. The liquid crystal display device according to (n), wherein

  (V) the one connection member is disposed in the peripheral region on the second end side of the array substrate, and the other connection member is disposed in the peripheral region on the fourth end side of the array substrate; The liquid crystal display device according to (u), wherein the counter electrode supply wiring includes an extending portion extending from the seal region to the one connection member and the other connection member in the peripheral region.

  (W) The liquid crystal display device according to (v), wherein the extension portion of the counter electrode supply wiring is divided into a plurality of thin lines.

According to the present invention, it is possible to obtain a liquid crystal display device in which a reduction in the outer dimensions of the display area is achieved.

  Hereinafter, an active matrix liquid crystal display device according to an embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the liquid crystal display device (1) includes a light transmissive active matrix liquid crystal panel (100) having a display area (103) having a diagonal size of 14 inches, and the liquid crystal panel (100). An X drive circuit unit (800) and a Y drive circuit unit (900) for driving are included.

  As shown in FIG. 2, an array substrate (200) constituting the liquid crystal panel (100) has 640 × 3 signal lines Xi (i = 1, 2, 3,..., 1920) on a glass substrate (201). ) And 480 scanning lines Yj (j = 1, 2, 3,..., 480) are arranged so as to be substantially orthogonal to each other. The display area (103) of the array substrate (200) includes pixel electrodes (251) arranged via TFTs (221) in the vicinity of the intersections of the signal lines Xi and the scanning lines Yj. In addition, the storage capacitor line Cj is disposed substantially parallel to the scanning line Yj and having a region overlapping with the pixel electrode 251. The storage capacitor line Cj includes the storage capacitor line Cj. (Cs) is formed.

  In this TFT (221), the scanning line Yj itself is used as a gate electrode, and as shown in FIG. 4, an insulating film (211) formed by laminating silicon oxide and silicon nitride is formed on the insulating film (211). The a-Si: H film to be disposed is provided as a semiconductor film (213). Further, silicon nitride is disposed on the semiconductor film (213) as a channel protective film (215) that is self-aligned with the scanning line Yj. The semiconductor film (213) is electrically connected to each pixel electrode (251) via an n + type a-Si: H film and a source electrode (231) arranged as a low resistance semiconductor film (217a). Has been. The semiconductor film (213) is connected to the signal line Xi via an n + type a-Si: H film disposed as a low resistance semiconductor film (217b) and a drain electrode (233) extending from the signal line Xi. Electrically connected. An element protective film (241) made of silicon nitride is disposed on the TFT (221) and around the pixel electrode (251) to constitute the array substrate (200).

  The counter substrate (500) constituting the liquid crystal panel (100) is formed on a glass substrate (501) with a TFT (221), a pixel electrode (251), a signal line Xi, a pixel electrode (251), a scanning line Yj, A light shielding film (511) made of chromium (Cr) for light shielding between the light shielding film, an R, G, and B color filter portion (521) disposed between the light shielding film (511), the light shielding film (511) and the color A filter protective film (531) disposed on the filter section (521) and a counter electrode (541) made of ITO disposed on the filter protective film (531) are provided.

  In the liquid crystal panel (100) of this embodiment, the array substrate (200) and the counter substrate (500) described above are arranged in the sealing material (111) as shown in FIG. 113) (see FIG. 4) are arranged opposite to each other with a gap of 5 microns, and a nematic liquid crystal (600) is formed as an optical modulation layer in the gap in the seal region (111) as shown in FIG. , (581). A pair of polarizing plates (291) and (591) are disposed on the outer surfaces of the array substrate (200) and the counter substrate (500).

  In the liquid crystal panel (100) of this embodiment, the signal lines Xi and the scanning lines Yj achieve the downsizing of the external dimensions of the apparatus. Therefore, as shown in FIG. 1, each signal line Xi is connected to the array substrate (200). Only the first long side (201a) is drawn, and each scanning line Yj is drawn to the first short side (201c) side of the array substrate (200). As shown in FIG. 3, each signal line Xi is electrically connected to signal line pads (761), (762), (763), and (764) arranged along the first long side (201a). Although not shown, each scanning line Yj is electrically connected to a scanning line pad arranged along the first short side (201c) of the array substrate (200).

  Each signal line pad (761), (762), (763), (764) is exposed through a slit-shaped opening (243) formed in the element protective film (241) as shown in FIG. As shown in FIG. 1, it is connected to the X-drive circuit board (811) via eight X-TABs (711), (712),. The signal line pads (761), (762), (763), (764) and the output leads (821) of the respective X-TABs (711), (712),..., (718) are as shown in FIG. To the X-drive circuit board (811) and the input leads (831) of the X-TAB (711), (712),..., (718). Are electrically connected by solder. Each scanning line pad is also connected to the Y-drive circuit board (911) through four Y-TABs (721),..., (724). Although not shown, the scanning line pad and the output leads of each Y-TAB (721), (722),..., (724) are electrically connected via an anisotropic conductive film, and each Y-TAB. The input leads (721),..., (724) and the Y-drive circuit board (911) are electrically connected by solder.

  Incidentally, the counter electrode (541) is made of ITO and has a relatively high resistance. The counter electrode (541) is supplied with a counter electrode voltage whose polarity is inverted with respect to the reference potential every frame period in order to reduce the amplitude of various drive voltages such as a signal voltage. A counter electrode voltage whose polarity is inverted with respect to the reference potential may be supplied every horizontal scanning period. For this reason, it is desirable to supply the counter electrode voltage from a plurality of locations to the counter electrode (541).

  Therefore, in this embodiment, the outer peripheral region of the array substrate (200) is disposed along the first long side (201a) of the array substrate (200) as shown in FIG. Four power supply pads (731), (732), (733), (734) and four power supply pads arranged along the second long side (201b) opposite to the first long side (201a) (735), (736), (737), (738) are arranged. The four power supply pads (731), (732), (733), and (734) are exposed by the opening (245) (see FIG. 3) formed in the element protection film (241), and four power supply pads (731), (732), (733), and (734) are exposed. The power supply pads (735), (736), (737), and (738) are also exposed by the opening (245) (see FIG. 5) formed in the element protective film (241).

  The counter electrode (541) of the counter substrate (501) includes connection protrusions (741), (742),..., (748) corresponding to the power feeding pads (731),. The connection protrusions (741), ..., (748) of the counter electrode (541) and the power supply pads (731), ..., (738) are dispersed in the resin outside the seal region (111). It is electrically connected by a transfer (115). Here, the connecting protrusions (741),..., (748) and the power feeding pads (731),..., (738) are electrically connected by the transfer (115) disposed in the peripheral region outside the seal region (111). However, the transfer (115) may be arranged in the seal region (111) or inward of the seal region (111).

  Since X-TAB (711), (712),..., (718) are arranged on the first long side (201a) side of the array substrate (200), as shown in FIG. 731) from the outermost input lead (821a) of the X-TAB (711), and the power feeding pad (732) from the outermost input lead (not shown) of the X-TAB (713). 733) is from the outermost input lead (not shown) of the X-TAB (716), and the power supply pad (734) is from the outermost input lead (not shown) of the X-TAB (718). Each of the power supply pads (731),..., (734) is connected to a common pad (751) adjacent to the signal line pad (761) so that the counter electrode voltage is supplied to each other. Electrical connection is established via (121-2), (121-3), and (121-4).

  Since the X-TAB (711),..., (718) is not arranged on the second long side (201b) side of the array substrate (200), it is arranged along the second long side (201b) in this embodiment. The counter electrode voltage is supplied to the four power supply pads (735),..., (738) as follows.

  That is, the first connection wiring (121-1) is divided into five second connection wirings (123-1) each having a wiring width of 20 microns and a space between the wirings of 20 microns outside the seal region (111). Then, it is guided to the relay area (125) inside the seal area (111). From the relay area (125), each wiring width is again divided into six third connection wirings (127) each having a wiring width of 20 microns and a wiring space of 20 microns, and wiring is performed in the seal region (111). Specifically, among the third connection wirings (127), the four third connection wirings (127) pass through the seal region (111) through the second short side (201d) and the second long side ( 201b) and further routed along the first short side (201c) and again led out of the seal region (111) via the five second connection wires (123-4), the first connection wire (121 -4) Electrically connected to Further, the other two of the third connection wires (127) have a second short side (201d), a second long side (201b), and a second portion between the seal region (111) and the display region (103). 1 Wired along the short side (201c), led to the outside of the seal region (111) via the second connection wiring (123-4), and electrically connected to the first connection wiring (121-4) The

  The power supply pads (735) to (738) are electrically connected to the above-described third connection wiring (127), so that the counter electrode voltage is supplied. As described above, according to the active matrix type liquid crystal display device (1) of this embodiment, the signal line Xi and the scanning line Yj are respectively connected to the first long side (201a) and the first short side of the array substrate (200). Since it is drawn only to (201c), the connection region with X-TAB (711),..., (718) and Y-TAB (721),..., (724) is the first of the array substrate (200). It only needs to be provided on the long side (201a) and the first short side (201c). Also, X-TAB (711),..., (718) and Y-TAB (721),..., (724) are also formed on the first long side (201a) and the first short side (201c) of the array substrate (200), respectively. Only need to be provided. For this reason, downsizing of the outer dimensions of the active matrix type liquid crystal display device (1) is achieved with respect to the display region (3). It should be noted that the X drive circuit section (800) such as the X-TAB (711),..., (718) is placed on the first long side (201a) side of the array substrate (200) and the Y-TAB (721),. The Y drive circuit section (900) such as (724) may be directly mounted on the first short side (201c) side of the array substrate (200) or may be integrally formed.

  In addition, X-TAB (711),..., (718) is the first long side (201a) of the array substrate (200), and Y-TAB (721),..., (724) is the first long side of the array substrate (200). In spite of being arranged only on one short side (201c), the opposing electrode (541) has a power supply pad (on the first long side (201a) and second long side (201b) facing each other) 731),..., (738), so that the counter electrode voltage is fed, so that the counter electrode voltage is a multi-value whose polarity is inverted with respect to the reference voltage every one frame period or one or a plurality of horizontal scanning periods. Even when the driving voltage is used, a sufficient voltage is supplied to the counter electrode (541), so that display defects do not occur. In addition, the power supply pad disposed on the second long side (201b) side of the array substrate (200) where the X-TAB (711),..., (718) and the Y-TAB (721),. (734),..., (738) are supplied with the counter electrode voltage from the X-TAB (7111), (718) by the third connection wiring (127) arranged mainly in the seal region (111). There is no increase in the external dimensions of the active matrix liquid crystal display device (1) accompanying this wiring.

  Further, since the third connection wiring (127) includes a plurality of wirings arranged substantially parallel to each other along the seal region (111), the seal material (111) is provided even if the width of the seal region (111) is narrow. ) And the array substrate (200) increase in effective contact area, so that the sealing material (111) is less likely to peel from the array substrate (200).

  Further, since the third connection wiring (127) in the seal region (111) includes a plurality of wirings, the element protective film (241) and the insulating film (211) are firmly connected to each other between the wirings. The third connection wiring (127) is not peeled off from the insulating film (211) together with the sealing material (111). In addition, the degree of freedom in material selection based on the adhesiveness of the sealing material (111) can be increased. Here, the sealing region (111) where the sealing material (111) is disposed is 1.5 mm, but the sealing material (111) was not peeled off. In this embodiment, four of the third connection wires (127) are arranged in the seal region (111). However, three or more wires are sufficiently effective.

  In this embodiment, the third connection wiring (127) is made of six thin wires independent from each other, but a plurality of wirings partially connected as shown in FIG. 8, in other words, one wiring (127) Alternatively, a plurality of openings (131) may be formed.

  Further, in this embodiment, a part of the thin line constituting the third connection wiring (127) is also arranged between the display area (103) and the seal area (111), so that the seal material (113) is displayed. In order to prevent outflow to the region (103), the display region (103) and the seal region (111) can be brought close to each other, so that the display region (111) can be set wider than the outer dimensions.

  Further, according to the active matrix type liquid crystal display device (1) of this embodiment, the first connection wiring (121-1) and the fourth connection wiring (121-4) have five lines outside the seal region (111). The second connection wirings (123-1) and (123-4) are divided and guided into the seal region (111), and the six third connection wires (127) are routed through the seal region (111). It is led to each electric power feeding pad (735), ..., (738). In this way, each electrode extending outward from the seal region (111) through the seal region (111) is divided into a plurality of fine lines, so that the resistance can be reduced while maintaining the low resistance. The amount of the sealing material (113) flowing out can be suppressed. More specifically, as shown in FIG. 7A, for example, if the second connection wiring (123-1) is formed of a single thick line, the second connection wiring (123- Along the 1), the seal material (113) largely flows out to the end of the array substrate (200), causing a connection failure or cracking or chipping of the substrate when the array substrate (200) is scribed. However, in this embodiment, as shown in FIG. 7 (b), the second connection wiring (123-1) is formed of five fine lines, so that the array along the second connection wiring (123-1) is formed. The amount of the sealing material (113) flowing out to the end of the substrate (200) was sufficiently suppressed, and thus it was possible to prevent the substrate from being cracked or chipped at the time of scribing the array substrate (200). Here, the wiring extending outside the seal region (111) through the seal region (111) to supply the counter electrode voltage has been described as an example. However, in addition to this, the auxiliary capacitance line Cj is connected to the auxiliary capacitance line Cj. Similarly, the wiring for supplying the voltage has a larger wiring width than the signal line Xi and the scanning line Yj, and may cause the seal material (113) to flow out. The wiring width at this time is preferably 30 microns or less, more preferably 20 microns or less, although it depends on the viscosity of the sealing material (113).

  By the way, each power feeding pad (731), ..., (738), common pad (751), first connection wiring (121-1), ..., (121-4), relay region (125), second connection wiring ( 123-1), (123-4) and the third connection wiring (127) are made of aluminum (Al) in the same process as the signal line Xi, so that the manufacturing process is not increased, and thus the productivity is increased. There is no decline.

  In the above-described embodiment, the configuration is adopted in which the counter electrode voltage is supplied to each of the power supply pads (731),..., (738) only from the X-TAB (711), (713), (716), (718). , Y-TAB (721),..., (724) may be used together to supply the counter electrode voltage.

  Further, in the above-described embodiment, the third connection wiring (127) is arranged along the three sides of the seal region (111). However, the effect of the present invention can be achieved even if arranged on at least one side.

  Further, in the above embodiment, the liquid crystal panel (100) is connected to the X-TAB (711),..., (718) or Y-TAB (721),. (200) Needless to say, the drive element may be directly mounted on the (200).

FIG. 1 is a schematic front view of an active matrix liquid crystal display device according to an embodiment of the present invention. FIG. 2 is a partial schematic front view of the display area of the array substrate of FIG. FIG. 3 is a partial schematic front view of a region A in FIG. FIG. 4 is a schematic cross-sectional view of the active matrix type liquid crystal display device cut along the line a-a ′ in FIG. 3. FIG. 5 is a partial schematic front view of a region B in FIG. FIG. 6 is a schematic cross-sectional view of the active matrix type liquid crystal display device cut along the line b-b ′ in FIG. 5. FIG. 7 is a partial schematic front view for explaining the effect of the active matrix type liquid crystal display device of this embodiment. FIG. 8 is a partial schematic front view of a third connection wiring according to another embodiment of the present invention.

Explanation of symbols

(1) ... Active matrix type liquid crystal display device
(100) ... LCD panel
(103)… Display area
(111)… Sealing area
(113)… Sealing material
(115)… Transfer
(200) ... Array substrate
(221)… TFT
(500)… Counter substrate
(600) ... Nematic liquid crystal
(800) ... X drive circuit
(900) ... Y drive circuit

Claims (7)

A first electrode substrate including a display region in which pixel electrodes are disposed, a seal region disposed around the display region, and a single wiring disposed in the seal region along the seal region When,
A second electrode substrate having a counter electrode to which a voltage is supplied through the wiring, disposed opposite to the first electrode substrate with a predetermined gap, and bonded to the first electrode substrate in the seal region;
A light modulation layer held between the first electrode substrate and the second electrode substrate,
The liquid crystal display device , wherein the wiring for supplying a voltage to the counter electrode has a plurality of openings arranged along a longitudinal direction of the seal region.   2. The liquid crystal display device according to claim 1, wherein the wiring has a plurality of columns in which the openings are arranged along a longitudinal direction of the seal region.   2. The liquid crystal display device according to claim 1, wherein the counter electrode is connected to the wiring via a connection member disposed between the first electrode substrate and the second electrode substrate.   The connection member is disposed between the first electrode substrate and the second electrode substrate outside the seal region, and the wiring branches so as to be connected to the connection member via the seal region The liquid crystal display device according to claim 1, further comprising wiring. The first electrode substrate includes a signal line, a scanning line, a switch element connected to the signal line and the scanning line, a pixel electrode connected to the switch element, and the pixel electrode via a dielectric layer. And an auxiliary capacitance line arranged to face the
The liquid crystal display device according to claim 1, wherein the wiring is electrically connected to the auxiliary capacitance line.   The liquid crystal display device according to claim 1, further comprising at least one additional power feeding pad.   The liquid crystal display device according to claim 6, wherein each of the power supply pad and the additional power supply pad is disposed on two opposite sides of the liquid crystal display device.

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