JP5610710B2 - Liquid crystal devices and electronic devices - Google Patents

Description

  The present invention relates to a liquid crystal device and an electronic apparatus.

  As a means to widen the viewing angle of the liquid crystal device, an electric field in the in-plane direction (transverse direction) is generated with respect to the substrate, and the liquid crystal molecules are rotated in a plane substantially parallel to the substrate by the electric field in the lateral direction. A so-called lateral electric field type IPS (In-Plane Switching) system for controlling the above-mentioned has been put into practical use. Furthermore, an FFS (Fringe-Field Switching) system that improves the IPS system has been proposed.

  In such a lateral electric field type liquid crystal device, a conductive substrate such as an electrode such as a common electrode or a pixel electrode or a wiring is arranged on an element substrate on which a driving element such as a TFT is formed, and a counter substrate on the display surface side. Has a configuration in which no conductive member is provided. Therefore, there is a problem that the liquid crystal display is likely to be disturbed because it is easily affected by an external electric field on the counter substrate side represented by static electricity. In order to solve this, there has been proposed a method of preventing display disturbance by forming a conductive film on the counter substrate side and capturing static electricity with the conductive film (see, for example, Patent Document 1).

  Patent Document 1 includes a configuration in which a transparent conductive film is provided on the outer side (the side opposite to the liquid crystal layer) of the glass substrate included in the counter substrate, and a configuration in which a transparent conductive film is provided on the inner side (the liquid crystal layer side) of the glass substrate. Are listed. Comparing these, the counter substrate having a transparent conductive film on the inner side is formed by laminating with a member such as an alignment film similarly provided on the inner side, so when these films are formed, the glass substrate is turned upside down. Since it becomes unnecessary, there is an advantage that manufacture is easy.

JP 2001-51263 A

  Patent Document 1 discloses a configuration in which a metal light-shielding layer provided in a grid pattern in an inter-pixel region using chromium as a forming material is used as the conductive film. However, in such a configuration, a portion where there is no conductive film in a plan view exists in each lattice, and therefore, places where static electricity can be captured are limited. Therefore, protection from static electricity is not sufficient. In particular, in the case of a large-sized liquid crystal device having a large display area area, the probability that the area area of one pixel is increased is higher than that of a small-sized liquid crystal device having a small display area area. Therefore, the area directly exposed to static electricity increases and the influence on the display also increases.

  In Patent Document 1, when the liquid crystal device is used as, for example, a large display device having a large image display area area (for example, a TV image display device having a display area of approximately 20 inches diagonal or more), an area between pixels is used. For example, the distance between the center and the periphery of the display area is increased in the metal light-shielding layer provided in a grid pattern. For this reason, due to resistance components present in the metal light shielding layer, there is a potential difference between the center and the periphery of the display area due to, for example, supplemented static electricity. As a result, the influence of an external electric field typified by static electricity varies depending on the position of the display region, so that the influence of the external electric field on the liquid crystal display is not uniform, and there is a problem in that image display is disturbed.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a liquid crystal device having a good antistatic function and suppressing image disturbance caused by external static electricity. It is another object of the present invention to provide an electronic apparatus including such a liquid crystal device.

  In order to solve the above problems, in the liquid crystal device of the present invention, a liquid crystal layer is sandwiched between a first substrate and a second substrate, a pixel electrode and a common electrode are formed on the first substrate, and the pixel A horizontal electric field type liquid crystal device that drives a liquid crystal by an electric field generated between an electrode and the common electrode, wherein a light shielding metal corresponding to the space between the pixel electrodes is provided on the surface of the second substrate on the liquid crystal layer side. A layer is formed, and an electrostatic shielding layer is formed at a position facing the pixel electrode in contact with the metal light shielding layer and a position between the pixel electrodes.

  According to this configuration, a region overlapping the pixel electrode in a planar manner, that is, a region where the metal light shielding layer is not formed is covered with the electrostatic shielding layer and static electricity is captured. Then, the metal light shielding layer and the electrostatic shielding layer cooperate to capture static electricity from the outside of the apparatus, and the electric charges are diffused throughout the metal light shielding layer and the electrostatic shielding layer. Therefore, compared with the case where static electricity is captured only by the metal light shielding layer, the capacity of static electricity that can be captured without affecting the liquid crystal layer is increased, and the electrostatic shielding layer has a high shielding effect. Therefore, a liquid crystal device in which image display disturbance due to the influence of static electricity is suppressed can be obtained.

  In the present invention, it is desirable that an alignment film is formed on the surface of the electrostatic shielding layer on the liquid crystal layer side, and an insulating layer is provided between the electrostatic shielding layer and the alignment film.

  According to this configuration, the metal light shielding layer and the electrostatic shielding layer are further separated from the liquid crystal layer by the thickness of the insulating layer, so that a voltage drop occurs and the force (Coulomb force) that the captured static electricity acts on the liquid crystal layer is generated. Weaken. Therefore, it is possible to provide a liquid crystal device capable of preventing image disturbance due to static electricity and capable of displaying a high-quality image as compared with a device without an insulating layer.

  In the present invention, the insulating layer is preferably a colored layer or an overcoat layer which is a material for forming a color filter layer.

  In this configuration, since a member having a liquid crystal device capable of full-color display is used as an insulating layer, there is no need to newly provide an insulating layer in order to increase a separation distance, and a good image due to static electricity can be obtained. Display disturbance can be prevented.

  In the present invention, a driving circuit and a routing wiring electrically connected to the driving circuit are provided on the surface of the first substrate on the liquid crystal layer side, and the routing wiring and the electrostatic shielding layer or metal A light shielding layer is electrically connected at a position where they overlap each other through a conductive material sandwiched between the first substrate and the second substrate, and the potential of the electrostatic shielding layer is driven by the drive It is desirable to control to a predetermined potential by a circuit.

  According to this configuration, since the electrostatic charge trapped in the electrostatic shielding layer is kept at a predetermined potential, the static electricity does not accumulate and increase even when used for a long time, and image display disturbance due to the influence of static electricity is prevented. A suppressed liquid crystal device can be obtained. In addition, since the electrostatic shielding layer is connected to the lead wiring connected to the driving circuit directly or via the metal light shielding layer, the charge accumulated in the electrostatic shielding layer without forming a new conductive component. Thus, a liquid crystal device in which image display disturbance due to the influence of static electricity is suppressed can be obtained.

  In the present invention, it is desirable that the potential of the electrostatic shielding layer is controlled to the same potential as the potential of the common electrode.

  According to this configuration, since there is no potential difference between the electrostatic shielding layer and the common electrode, it is difficult to generate a vertical electric field between the first substrate and the second substrate, and image display disturbance is suppressed. A liquid crystal device can be obtained.

  Here, it is desirable that a plurality of the conductive materials for electrically connecting the routing wiring and the electrostatic shielding layer or the metal shielding layer are disposed at a plurality of locations.

  According to this configuration, for example, even when the display area has a large display area with a large distance between the center and the periphery of the display area, the potential difference due to the position of the display area in the electrostatic shielding layer is reduced. Therefore, the influence of an external electric field typified by static electricity is suppressed so as not to vary depending on the position of the display area. As a result, the liquid crystal display has a uniform influence on the liquid crystal display, and a liquid crystal device in which image display disturbance is suppressed can be obtained.

  In the present invention, the first substrate has an insulating film that covers the routing wiring, and the insulating film is provided with a contact hole in which a part of the routing wiring is exposed to the bottom, and the inside of the contact hole A conductive film that covers the routing wiring exposed at the bottom is formed, and the electrostatic shielding layer or the metal light shielding layer is electrically connected to the routing wiring through the conductive material and the conductive film. desirable.

  According to this configuration, since the lead wiring is prevented from being oxidized and good conduction is obtained, it is possible to effectively discharge the charges accumulated in the electrostatic shielding layer and to obtain a liquid crystal device capable of good display. . In particular, when the material for forming the routing wiring is a base metal such as aluminum, it is preferable because surface oxidation can be satisfactorily prevented and conduction can be ensured.

  In the present invention, the conductive film is preferably made of a conductive metal oxide.

  According to this configuration, the lead wiring exposed at the bottom of the contact hole can be satisfactorily prevented from being oxidized.

  In the present invention, the pixel electrode and the common electrode are stacked via an insulating film on the liquid crystal layer side of the first substrate, and the common electrode is provided closer to the liquid crystal layer than the pixel electrode. It is desirable that

  According to this configuration, the electrostatic shielding layer that captures static electricity and the pixel electrode are further apart. Therefore, the vertical electric field generated between the pixel electrode and the electrostatic shielding layer can be suppressed to be weak, and a liquid crystal device in which image display disturbance is suppressed can be obtained.

  In the present invention, a sealing material that seals liquid crystal molecules is provided around the liquid crystal layer, and a display area formed by the plurality of pixel electrodes is disposed inside the area surrounded by the sealing material. And a non-display area is provided between the display area and the seal material inside the area surrounded by the seal material, and the non-display area of the first substrate is provided in the non-display area of the first substrate. It is preferable that an electrostatic protection member for discharging static electricity entering the display area is disposed, and the electrostatic shielding layer is provided so as to overlap the electrostatic protection member in a planar manner.

  According to this configuration, since the electrostatic shielding layer protects the electrostatic protection member disposed in the non-display area together, the display area can be well protected, and the display disturbance of the image is suppressed and the electrostatic breakdown is achieved. It is possible to provide a liquid crystal device that achieves good prevention of the above.

  An electronic apparatus according to the present invention includes the above-described liquid crystal device.

  According to this configuration, it is possible to provide an electronic apparatus that includes a liquid crystal device that is free from image display disturbance due to static electricity from the external environment and that can display a high-quality image.

1 is an equivalent circuit diagram of a liquid crystal device according to a first embodiment of the present invention. 1 is a schematic plan view of a liquid crystal device according to a first embodiment of the present invention. 1 is a schematic plan view of a liquid crystal device according to a first embodiment of the present invention. 1 is a schematic plan view of a liquid crystal device according to a first embodiment of the present invention. 1 is a schematic cross-sectional view of a liquid crystal device according to a first embodiment of the present invention. It is explanatory drawing which shows the electric potential of the common electrode of the liquid crystal device which concerns on 1st Embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic when the liquid crystal device which concerns on 1st Embodiment is a large sized panel, (a) is a top view, (b) is a fragmentary sectional view. It is a schematic sectional drawing of the liquid crystal device which concerns on the modification of this invention. It is a schematic sectional drawing of the liquid crystal device which concerns on the modification of this invention. It is a perspective view which shows an example of the electronic device which concerns on this invention.

[First Embodiment]
The liquid crystal device according to the first embodiment of the present invention will be described below with reference to FIGS. In all the drawings below, the film thicknesses and dimensional ratios of the constituent elements are appropriately changed in order to make the drawings easy to see.

  The liquid crystal device according to the present embodiment performs image display by controlling the azimuth angle of liquid crystal molecules by a lateral electric field orthogonal to the traveling direction of light. As such a method, an FFS method, an IPS method, or the like is known. Hereinafter, the liquid crystal device adopting the FFS driving method will be described based on a liquid crystal device capable of full color display, but the present invention is also applicable to an IPS liquid crystal device.

  FIG. 1 is an equivalent circuit diagram of the liquid crystal device 1 of the present embodiment. In a plurality of sub-pixel areas formed in a matrix that constitutes an image display area of the liquid crystal device 1, a pixel electrode 9 and a TFT 30 for switching control of the pixel electrode 9 are formed. A liquid crystal layer 50 is interposed between the pixel electrode 9 and the common electrode 19. The common electrode 19 is electrically connected to the common line 3b extending from the scanning line driving circuit 204, and is held at a common potential in a plurality of subpixels.

  A data line 6 a extending from the data line driving circuit 201 is electrically connected to the source of the TFT 30. The data line driving circuit 201 supplies the image signals S1, S2,..., Sn to each subpixel via the data line 6a. The image signals S1 to Sn may be supplied line-sequentially in this order, or may be supplied for each group to a plurality of adjacent data lines 6a.

  A scanning line 3 a extending from the scanning line driving circuit 204 is electrically connected to the gate of the TFT 30. Scan signals G1, G2,..., Gm supplied from the scanning line driving circuit 204 to the scanning line 3a in a pulsed manner at a predetermined timing are applied to the gate of the TFT 30 in this order.

  The pixel electrode 9 is electrically connected to the drain of the TFT 30. The TFT 30 serving as a switching element is turned on for a certain period by the input of scanning signals G1, G2,..., Gm, so that the image signals S1, S2,. Writing is performed on the pixel electrode 9. Image signals S1, S2,..., Sn written to the liquid crystal layer 50 through the pixel electrode 9 are held for a certain period between the pixel electrode 9 and the common electrode 19 facing through the liquid crystal layer 50. The

  2 to 4 are plan views of the liquid crystal device 1 of the present embodiment as viewed from the counter substrate (second substrate) side, FIG. 3 is an enlarged view of a part of FIG. 2, and FIG. It is the figure which expanded a part of.

  As shown in FIG. 2, the liquid crystal device 1 of the present embodiment is bonded by a sealing material 52 at a peripheral portion of a portion where the element substrate (first substrate) 10 and the counter substrate 20 overlap in a plane, and this sealing material 52. The liquid crystal molecules are enclosed and held in the area (display area A) partitioned by. The sealing material 52 is formed with a liquid crystal injection port 55 for injecting liquid crystal molecules after the element substrate 10 and the counter substrate 20 are bonded to each other at the time of manufacture. 54 is sealed. A pixel electrode and a common electrode (not shown) are formed in a region overlapping the display region A on the inner surface side of the element substrate 10. The pixel electrode and the common electrode (not shown) are formed on the inner surface side of the element substrate 10 and planar with the sealing material 52. A wiring 18 is provided in a region overlapping with.

  A driving signal (for example, an image signal or a scanning signal) for driving the liquid crystal device 1 is provided on a portion (substrate protruding portion 10a) protruding from the overlapping portion of the element substrate 10 and the counter substrate 20 on one end side of the element substrate 10. A driving IC 208 is mounted for processing and supplying as appropriate, and an input terminal 202 is provided at the end. For example, an FPC (Flexible Printed Circuit) substrate on which wiring is formed is mounted on the input terminal 202 via an anisotropic conductive film 203, and is connected to an external power source and various external devices.

  Further, an electrostatic shield layer (electrostatic shielding layer) 40 described later is provided on the inner surface side of the counter substrate 20, and a conductive material (conductive connection) disposed at at least one corner of the counter substrate 20. Part) 43 and is electrically connected to the routing wiring 18 of the element substrate 10. In the liquid crystal device 1 according to the present embodiment, two conductive members 43 are provided at both ends of the side of the element substrate 10 on the other end side (side facing the side on the driving IC 208 side). In the liquid crystal device 1, a retardation plate, a polarizing plate, and the like are arranged in a predetermined direction as necessary, but the illustration is omitted here.

  FIG. 3 is an enlarged view of a region AR1 surrounded by a two-dot chain line in FIG. Here, the configuration on the element substrate side is mainly shown.

  As shown in the drawing, in the display area A, a plurality of sub-pixels P having a substantially rectangular shape in a plan view are arranged vertically and horizontally in a matrix. Further, the inside of the sealing material 52 and the periphery of the display area A is a non-display area M. In the non-display area M, static electricity entering from the lead-out wiring 18 was discharged, and the electrostatic protection area SA for protecting the sub-pixels P arranged in the display area A was not partitioned by the electrostatic protection area SA. There is provided a dummy area DA in which a dummy pixel (electrostatic protection member) DP that substitutes by destroying the sub-pixel P by static electricity is disposed.

  Around the display area A of the element substrate 10, a routing wire 18 is formed so as to overlap with the sealing material 52 and supply a common potential to the common electrode 19, and an outer side (liquid crystal layer 50) is formed at a corner where the routing wire 18 is bent. A connecting portion 18a is formed to protrude on the opposite side.

  On the other hand, a connecting portion 40a protruding outward is also formed at a corner portion of the electrostatic shield layer 40 included in the counter substrate (not shown). The connecting portion 40a and the connecting portion 18a overlap each other in a planar manner, and both are formed to extend to the outside of the sealing material 52, and are electrically connected via the conductive material 43 at each end. Has been. Therefore, the potential of the electrostatic shield layer 40 is kept at the same potential as the common potential.

  Next, the non-display area M will be described in detail with reference to FIG. FIG. 4 is an enlarged view of a region AR2 surrounded by a two-dot chain line in FIG.

  As shown in the figure, in the non-display area M, a dummy area DA having a plurality of dummy pixels DP arranged around the sub-pixel P, and an area between the dummy area DA and the sealing material 52 are arranged. An electrostatic protection region SA having a short ring (electrostatic protection member) 211 and a resistance element (electrostatic protection member) 212 is provided. The short ring 211 and the resistance element 212 in the electrostatic protection area SA are provided to protect the TFTs 30 arranged for each sub-pixel P mainly from static electricity generated during the manufacturing process.

  Static electricity generated during the manufacturing process enters the sub-pixel P from the periphery of the display area A. For this reason, the generated static electricity is discharged by the function of the electrostatic protection area SA, and the sub-pixel P is destroyed by destroying the dummy pixel DP arranged in the dummy area DA with the static electricity that has not been discharged. Is preventing.

  The resistance element 212 is provided at the end of each matrix corresponding to the matrix in which the sub-pixels P and the dummy pixels DP are arranged. In the figure, every other row (even rows counted from the top row) is provided for each row of subpixels P and dummy pixels DP, and is connected to the scanning line 3a of each row. Although not shown in the figure, resistance elements 212 corresponding to the remaining rows (odd rows) are provided on the left side opposite to the right side shown in the drawing. A resistance element 212 is also provided for each column at the upper end of the column of subpixels P and dummy pixels DP.

  The common electrode 19 is formed so as to cover the sub-pixel P and the dummy pixel DP, and an overhanging portion 213 for connecting to the short ring 211 is provided at the end portion on the side where the resistance element 212 is provided. It has been. The overhang portion 213 is provided at a position that does not overlap the resistance element 212, and the common electrode 19 and the short ring 211 are connected via the overhang portion 213.

  In addition, a connection portion 19 a having a substantially rectangular shape in plan view is provided on the overhang portion 213 provided at the upper corner portion of the common electrode 19 in order to connect to the lead-out wiring 18. Connected to the difference. Further, the connecting portion 19a is also connected to the short ring 211 via a plurality of contact holes 215. Electrostatic breakdown of the TFT 30 provided in the sub-pixel P is prevented by the members provided in the electrostatic protection area SA.

  Further, the electrostatic shield layer 40 is provided so as to overlap in plan with each configuration of the dummy area DA and the electrostatic protection area SA. As will be described later, the electrostatic shield layer 40 has a function of capturing static electricity from the outside, and prevents each component of the dummy area DA and the electrostatic protection area SA from being destroyed by static electricity. Therefore, in the dummy area DA and the electrostatic protection area SA, it is possible to prevent the subpixel P from being destroyed well. Further, since the electrostatic shield layer 40 and each component of the dummy area DA and the electrostatic protection area SA are electrically connected, it is possible to diffuse static electricity in cooperation with each other.

  Next, a cross-sectional configuration of the liquid crystal device 1 will be described. FIG. 5 is a schematic cross-sectional view around the sealing material 52 and the conductive material 43 of the liquid crystal device 1 of the present embodiment. Here, in order to make the figure easy to see, the configuration in the non-display area is omitted.

  As shown in the figure, the liquid crystal device 1 includes an element substrate 10, a counter substrate 20 disposed to face the element substrate 10, and a liquid crystal layer 50 sandwiched between the element substrate 10 and the counter substrate 20. Configured. Further, the liquid crystal device 1 is provided with a sealing material 52 along the edge of the region where the element substrate 10 and the counter substrate 20 face each other, and the liquid crystal molecules constituting the liquid crystal layer 50 are sealed. The liquid crystal device 1 is configured such that illumination light is irradiated from the element substrate 10 side, and a displayed image is observed from the counter substrate 20 side.

  The element substrate 10 includes a substrate body 11 having translucency. As a material for forming the substrate body 11, for example, an inorganic substance such as glass, quartz glass, or silicon nitride, or an organic polymer compound (resin) such as an acrylic resin or a polycarbonate resin can be used. In addition, a composite material formed by laminating or mixing these materials may be used as long as it has translucency.

  On the surface of the substrate body 11 on the liquid crystal layer 50 side, scanning lines 3a made of a conductive material such as aluminum or copper and data lines (not shown) are formed. In addition, in the region overlapping the sealing material 52 in a plan view, the lead wiring 18 made of the same conductive material is formed. These may be formed using the same material or may be formed using different materials. These are obtained, for example, by patterning after forming a thin film of a conductive material. In this embodiment, aluminum is used as a forming material.

  A gate insulating film 12 is formed on the substrate body 11 so as to cover the scanning lines 3 a, the data lines, and the routing wirings 18. The gate insulating film 12 is made of a light-transmitting material having an insulating property such as silicon nitride or silicon oxide.

  On the gate insulating film 12, a semiconductor layer 32, a source electrode 33 connected to one end of the semiconductor layer 32, and a drain electrode 34 connected to the other end of the semiconductor layer 32 are formed. The bottom gate type TFT 30 is constituted by the source electrode 33, the drain electrode 34, and the scanning line 3a. An interlayer insulating film 13 is formed so as to cover the TFT 30. Similar to the gate insulating film 12, the interlayer insulating film 13 is made of a translucent material having insulating properties such as silicon nitride and silicon oxide.

A pixel electrode 9 is formed on the interlayer insulating film 13 and is electrically connected to the drain electrode 34 of the TFT 30 through the contact hole 16. The pixel electrode 9 is formed of a light-transmitting conductive material such as ITO (Indium Tin Oxide) or tin oxide (SnO ₂ ). In this embodiment, ITO is used.

  An interelectrode insulating film 14 is formed on the interlayer insulating film 13 so as to cover the pixel electrodes 9. Like the gate insulating film 12 and the interlayer insulating film 13, the interelectrode insulating film 14 is made of a translucent material having insulating properties such as silicon nitride and silicon oxide, and is formed on the interlayer insulating film 13. The pixel electrode 9 is covered.

  A ladder-like common electrode 19 is formed on the interelectrode insulating film 14. The pixel electrode 9 and the common electrode 19 are disposed via the interelectrode insulating film 14 and constitute an FFS-type electrode structure. The common electrode 19 is connected to the lead wiring 18 through a contact hole 17 that communicates the gate insulating film 12, the interlayer insulating film 13, and the interelectrode insulating film 14. The common electrode 19 is formed of a light-transmitting conductive material such as ITO. In this embodiment, ITO is used as the material of the common electrode 19.

  An alignment film 15 is formed on the interelectrode insulating film 14 so as to cover the common electrode 19. The alignment film 15 is made of, for example, an organic material such as polyimide or an inorganic material such as silicon oxide. The alignment film 15 of the present embodiment is obtained by applying a polyimide forming material, drying and curing it, and then subjecting the upper surface to a rubbing treatment.

  On the other hand, the counter substrate 20 includes a substrate body 21 having translucency. A material similar to that of the substrate body 11 can be used as a material for forming the substrate body 21.

An electrostatic shield layer 40 is formed on the surface of the substrate body 21 on the liquid crystal layer 50 side so as to cover the entire surface of the display area A, the dummy area DA, and the electrostatic protection area SA shown in FIG. The electrostatic shield layer 40 captures static electricity from the outside, and releases the captured static electricity through a conductive material 43 described later, thereby generating an unexpected vertical electric field between the counter substrate 20 and the element substrate 10. Provided to prevent. The electrostatic shield layer 40 is formed using a light-transmitting conductive material such as ITO or SnO _{2. In} the present embodiment, ITO is used as a forming material.

  On the surface of the electrostatic shield layer 40 on the liquid crystal layer 50 side, a color filter layer 22 including a colored layer 22a and a black matrix (metal light shielding layer) 22b is formed. The color filter layer 22 is formed, for example, by forming a black matrix 22b patterned in a lattice shape using a generally known method using a metal material such as chromium as a forming material, and then forming a liquid in an opening 22c provided by patterning. The formation material of the colored layer 22a is arranged and formed using a wet coating method such as a droplet discharge method.

  In this embodiment, the thickness of each layer is 2 μm for the colored layer 22 a and 0.15 μm for the black matrix 22 b. The color filter layer 22 modulates the light that enters from the element substrate 10 side and exits to the counter substrate 20 side into red, green, and blue, and mixes the light of each color, thereby enabling full color display.

  An overcoat layer (insulating layer) 24 is formed on the color filter layer 22. The overcoat (OVC) layer 24 has a function of physically or chemically protecting the color filter layer 22. Further, from the formed colored layer 22a and black matrix 22b, low molecular weight substances such as reaction residues of curing agents and ionic impurities contained in the respective forming materials are eluted into the liquid crystal layer 50, causing display disturbance. prevent. The OVC layer 24 is formed using a curable resin having translucency such as an acrylic resin or an epoxy resin. In this embodiment, an acrylic resin is used and the film thickness is 2 μm.

  An alignment film 25 is formed on the OVC layer 24 using the same material as that of the alignment film 15. The alignment film 25 of the present embodiment is obtained by applying a polyimide forming material, drying and curing the polyimide forming material, and then rubbing the upper surface thereof in a certain direction. The alignment direction of the alignment film 25 by rubbing is set to be the same as the alignment direction of the alignment film 15.

  In addition, on the OVC layer 24 in a region overlapping with the liquid crystal layer 50, a spacer 56 is formed in a region overlapping with the black matrix 22b. The spacer 56 is for holding the separation distance between the element substrate 10 and the counter substrate 20 so as not to be a certain value or less. For example, when stress is applied from the counter substrate 20 side, the thickness of the liquid crystal layer 50 does not become less than the height of the spacer 56, so that display disturbance can be prevented.

  The routing wiring 18 provided on the element substrate 10 and the electrostatic shield layer 40 provided on the counter substrate 20 are regions outside the sealing material 52 surrounding the liquid crystal layer 50 (on the side opposite to the liquid crystal layer 50). In FIG. 2, the electrical connection is established through the conductive material 43. As the conductive material 43, a curable resin in which conductive fine particles are mixed, a silver paste, or the like can be used. Examples of the conductive fine particles include metal fine particles such as Au and Ag, and those obtained by coating the surface of fine particles having no conductivity with a conductive material such as metal.

  In the region where the conductive material 43 on the element substrate 10 side is disposed, a contact hole 41 is formed so as to penetrate the gate insulating film 12, the interlayer insulating film 13, and the interelectrode insulating film 14 and communicate with each other. A part of the wiring 18 is exposed.

Since the routing wiring 18 of this embodiment uses aluminum, which is a base metal, as a forming material, when the contact hole 41 is formed and exposed, the surface is oxidized to form an oxide film and cannot be electrically connected. There is a fear. Further, only a part of the routing wiring 18 is exposed at the bottom of the contact hole 41, and the conductive area with the conductive material 43 is small. Therefore, in order to prevent the surface oxidation of the routing wiring 18 and to ensure the conduction with the conductive material 43, the conductive film 44 which covers the contact hole 41 and is made of ITO or SnO ₂ is formed. It is desirable.

  Further, a contact hole 42 that penetrates the black matrix 22b and the OVC layer 24 and communicates with each other is formed in a region where the conductive material 43 on the counter substrate 20 side is disposed. The conductive material 43 is electrically connected to the black matrix 22b and the electrostatic shield layer 40.

  The liquid crystal device 1 of the present embodiment has the above configuration. In the liquid crystal device 1 having such a configuration, the black matrix 22b and the electrostatic shield layer 40 cooperate to capture static electricity from the outside of the device, and the charges are diffused throughout the black matrix 22b and the electrostatic shield layer 40. Let Therefore, it is possible to prevent the display disturbance due to static electricity and to provide the liquid crystal device 1 capable of displaying a high-quality image.

  In particular, a large panel for a TV having a large screen size has a wide display area. For this reason, the electrostatic shield layer 40 formed using a light-transmitting conductive material (ITO) has a higher resistance value than that of the metal material (chromium), and diffusion of trapped charges at the center of the display region. Since the effect is insufficient, the electrostatic shield layer 40 alone is insufficient as a countermeasure against static electricity. Therefore, by providing the black matrix 22b having a low resistance value in addition to the electrostatic shield layer 40, a high shielding effect against static electricity can be exhibited.

  Specifically, in the present embodiment, static electricity captured by the black matrix 22 b and the electrostatic shield layer 40 is discharged to the routing wiring 18 through the conductive material 43. Further, since the black matrix 22b and the electrostatic shield layer 40 are electrically connected to each other, the overall resistance is lower than the case where both capture and discharge static electricity independently, and the captured charges can be discharged efficiently. Therefore, display disturbance can be prevented without static electricity being stored in the counter substrate 20.

  In the present embodiment, the colored layer 22a and the OVC layer 24 are provided between the electrostatic shield layer 40 and the alignment film 25, and the electrostatic shield layer 40 and the liquid crystal layer correspond to the thickness of these layers. 50 is separated. Therefore, compared with the case where the electrostatic shield layer 40 is formed in contact with the alignment film 25, the Coulomb force due to static electricity captured by the electrostatic shield layer 40 is weakened, and the liquid crystal layer 50 is hardly affected. Further, in the liquid crystal device capable of color display, since the separation distance is obtained using the colored layer 22a and the OVC layer 24, it is not necessary to provide a new insulating layer in order to obtain the separation distance. Accordingly, the liquid crystal device 1 capable of preventing display disturbance caused by static electricity and displaying a high-quality image can be obtained.

  In the present embodiment, the routing wiring 18 and the electrostatic shield layer 40 are electrically connected at a position where they overlap in a plane via the conductive material 43, and the potential of the electrostatic shield layer 40 is set by the drive circuit. The controlled potential is controlled to the same potential as that of the common electrode 19. For this reason, the electrostatic charge trapped by the electrostatic shield layer 40 is kept equal to the common potential, so that static electricity does not accumulate or increase even when used for a long time. In addition, since the electrostatic shield layer 40 is connected to the routing wiring 18, it is possible to release the charges accumulated in the electrostatic shield layer 40 without forming a new conductive component.

  In the present embodiment, the pixel electrode 9 is provided on the side opposite to the liquid crystal layer 50 with the common electrode 19 in between. Therefore, the black matrix 22b and the electrostatic shield layer 40 for capturing static electricity are further away from the pixel electrode 9, and the pixel electrode 9 and the electrostatic shield layer 40, the pixel electrode 9 and the black The electric field generated between the matrix 22b and the matrix 22b can be suppressed more weakly, and the liquid crystal device 1 in which image disturbance is suppressed can be obtained.

  In addition, the magnitude | size and position which form the electrostatic shield layer 40 are not restricted to what is shown in this embodiment. The electrostatic shield layer 40 may be disposed so as to cover the opening 22c of the black matrix 22b. For example, a plurality of electrostatic shield layers 40 may be provided corresponding to the opening 22c.

  In the present embodiment, the electrostatic shield layer 40 is electrically connected to the routing wiring 18, but the electrostatic shield layer 40 may be in an electrically isolated floating state. The floating state means that it is formed in a state where it is not connected to a conductive member such as a surrounding wiring or electrode.

  In the present embodiment, the electrostatic shield layer 40 is electrically connected to the lead wiring 18, but is not limited thereto. For example, the common electrode 19 may be formed so as to extend to the outside of the sealing material 52 so as to be electrically connected between the electrostatic shield layer 40 and the common electrode 19. Further, a conductive member for discharging static electricity charged in the electrostatic shield layer 40 may be provided separately.

  In the present embodiment, the electrostatic shield layer 40 is connected to the common electrode 19 and controlled to a common potential. However, the present invention is not limited to this. For example, the electrostatic shield layer 40 may be maintained at the GND potential by separately forming a wiring maintained at the GND potential and connecting the wiring and the electrostatic shield layer 40.

  In addition, the pixel electrode 9 can be disposed closer to the liquid crystal layer 50 than the common electrode 19. In this case, the pixel electrode 9 disposed on the side close to the liquid crystal layer 50 is a ladder electrode.

  By the way, in the liquid crystal device 1, when the potential of the electrostatic shield layer 40 is controlled to be the same as the potential of the common electrode 19 controlled by the drive circuit as described above, particularly in a large panel having a wide display area. In some cases, a potential difference may actually occur between the electrostatic shield layer 40 and the common electrode 19 due to the liquid crystal driving method. For example, in order to prevent occurrence of flicker in image display, a polarity inversion driving method (common inversion driving) is adopted in which the potential of the common electrode 19 is not always constant and is alternately changed between two potentials. There is. For example, as shown by the waveform Cd in FIG. 6, the potential of the common electrode 19 is switched between the potential V1 and the potential V2 at a predetermined time interval (for example, one frame time).

  In the case of such a driving method, the potential of the electrostatic shield layer 40 electrically connected to the common electrode 19 is similarly switched. At this time, with the electrostatic shield layer 40 alone, due to the resistance value, in the central portion of the display area, the potential of the common electrode 19 that alternates as shown by the waveform Sd indicated by the broken line in FIG. A phenomenon that cannot be followed (also referred to as “margin phenomenon”) may occur. As a result, a potential difference is generated between the electrostatic shield layer 40 and the common electrode 19. Therefore, the resistance value of the electrostatic shield layer 40 in the display area A is suppressed to be low by adopting a configuration in which both the electrostatic shield layer 40 and the black matrix 22b are provided as in the present embodiment. As a result, the potential difference between the electrostatic shield layer 40 and the common electrode 19 is suppressed, and the occurrence of the “round phenomenon” is suppressed. Therefore, since it becomes difficult to generate a vertical electric field between the substrates, the liquid crystal device 1 can be obtained in which image display disturbance is suppressed.

  Here, FIG. 7 shows an example of the configuration of the case where the liquid crystal device 1 of the present embodiment is a large panel. Fig.7 (a) is the top view which showed typically the liquid crystal device 1a which is a large sized panel, FIG.7 (b) typically shows the partial cross section along the BB line in Fig.7 (a). FIG. In the plan view, the liquid crystal injection port is omitted. The data line driving IC 210 and the scanning line driving IC 240 for the data line driving circuit and the scanning line driving circuit for processing and supplying driving signals (for example, image signals and scanning signals) for driving the liquid crystal device 1a as appropriate. Only the wiring is shown. In the sectional view, the spacer 56 is omitted. In order to simplify the drawing, the element substrate 10 is illustrated as one member.

  The liquid crystal device 1 a which is a large panel is different in structure from the liquid crystal device 1. First, the number of conductive members 43 provided is different. In the liquid crystal device 1, as shown in FIG. 2, the conductive material 43 is provided only in the vicinity of the two corners (the corner on the upper side of the drawing) of the display area A. On the other hand, in the liquid crystal device 1a, as shown in FIG. 7A, the conductive material 43 is provided in the vicinity of the four corners of the display area A and also in the middle of the four sides. Incidentally, in the liquid crystal device 1a of the present embodiment, a total of twelve conductive members 43 are provided. By providing a plurality of conductive materials 43 in this manner, the number of places where the electrostatic shield layer 40 (black matrix 22b) is electrically connected to the common electrode 19 increases, so that the in-plane potential of the electrostatic shield layer 40 is stabilized. And can be made uniform.

  Of course, the number of conductive members 43 is set so that the potential of the electrostatic shield layer 40 is made uniform according to the electrostatic shield layer 40, the black matrix 22b, and the common electrode 19 that are actually formed in the liquid crystal device 1a. And determining the position.

  Next, as shown in FIG. 7B, the liquid crystal device 1a, which is a large panel, has a position in the end of the electrostatic shield layer 40 in the plan view as viewed from the normal direction of the display region A. It has a structure that is outside of A and inside of the end of the black matrix 22b. With this structure, the electrostatic shield layer 40 covers the entire display area A and is covered with the black matrix 22b without exposing the end portion. Therefore, the electrostatic shield layer 40 can suppress the intrusion of static electricity into the display area A and can suppress the corrosion from the end portion.

  In the liquid crystal device 1, as shown in FIG. 5, the electrostatic shield layer 40 and the black matrix 22 b are sequentially formed on the substrate body 21, and the respective end portions are not mentioned. Therefore, if the end portion of the electrostatic shield layer 40 is exposed, the end portion may corrode. In such a case, in the liquid crystal device 1, as in the liquid crystal device 1a, the position of the end of the electrostatic shield layer 40 is outside the display area A and inside the end of the black matrix 22b. Preferably, the structure is

  Further, in the liquid crystal device 1a which is a large panel, the position of the end portion of the electrostatic shield layer 40 in the plan view seen from the normal direction of the display region A is the conductive material 43 as shown in FIG. It has a structure which is inside the installation area. With such a structure, electrical connection with the common electrode 19 (not shown) formed on the element substrate 10 is performed by the conductive material 43 coming into contact with the black matrix 22b. Become. Incidentally, in the liquid crystal device 1, as shown in FIG. 5, the conductive material 43 is electrically connected to the common electrode 19 (not shown) formed on the element substrate 10. It has a structure that is performed in contact with the layer 40.

  As described above, the conductive material 43 abuts against the black matrix 22b to have an electrical connection between the common electrode 19 and the electrostatic shield layer 40, whereby the conductive material 43 and the black matrix 22b. Adhesion can be improved. That is, the adhesion between chrome or the like forming the black matrix 22b and ITO or the like forming the electrostatic shield layer 40 is not necessarily good. Therefore, if the conductive material 43 and the black matrix 22b are brought into contact with each other at the position where the black matrix 22b and the electrostatic shield layer 40 are stacked, the black matrix 22b may be lifted off due to peeling off from the electrostatic shield layer 40. is there. Therefore, the black matrix 22b single layer is preferable at the position where the conductive material 43 abuts. Further, as shown in FIG. 5, when an opening is provided in the black matrix 22b and the conductive material 43 and the electrostatic shield layer 40 are brought into contact with each other, there is a risk that the light of the backlight leaks from this opening. Since no opening is provided in the black matrix 22b, there is no possibility of unnecessary light leakage.

  As described above, the present invention has been described using the embodiments (the liquid crystal device 1 and the liquid crystal device 1a). However, the present invention is not limited to these embodiments and does not depart from the spirit of the present invention. Of course, various forms can be implemented. Hereinafter, a modification will be described.

[Modification]
FIG. 8 is an explanatory diagram of the liquid crystal device 2 according to the first modification of the present invention. As shown in the figure, the electrostatic shield layer 40 included in the liquid crystal device 2 is formed to cover the surfaces of the substrate body 21 and the black matrix 22b, and the colored layer 22a partially covers the formed electrostatic shield layer 40. Is provided.

  A contact hole 42 penetrating the OVC layer 24 is formed on the counter substrate 20 side. In the contact hole 42, the black matrix 22b, the electrostatic shield layer 40, and the conductive material 43 are electrically connected. Yes.

  In the above embodiment, the electrostatic shield layer 40 is formed on the substrate body 21. At this time, since the process becomes easy, when the electrostatic shield layer 40 is formed on the entire substrate body 21 by vapor deposition or the like, the end surface of the substrate body 21 and the end portion of the electrostatic shield layer 40 are in the same position in a plane. The end face of the electrostatic shield layer 40 is exposed. In this case, there is a possibility that the electrostatic shield layer 40 may be corroded from the end portion, or static electricity may easily enter from the end portion. Therefore, it is preferable to align and form the electrostatic shield layer 40 having a predetermined shape so that the end portions do not coincide with the substrate body 21. However, since the substrate body 21 has translucency, for example, It is difficult to align the vapor deposition mask for forming the electrostatic shield layer 40.

  According to this modification, since the electrostatic shield layer 40 is formed to cover the surface of the black matrix 22b, a mask for forming the electrostatic shield layer 40 on the black matrix 22b when the black matrix 22b is formed. An alignment mark can be formed. As a result, the electrostatic shield layer 40 having an arbitrary shape can be formed at an appropriate position with respect to the substrate body 21.

  In the above embodiment, the electrostatic shield layer 40 and the conductive film 44 formed on the substrate body 21 are electrically connected by the conductive material 43, thereby connecting the electrostatic shield layer 40 and the common electrode 19. It is carried out. On the other hand, in this modification, since the black matrix 22b is interposed between the substrate body 21 and the electrostatic shield layer 40, the distance between the electrostatic shield layer 40 and the common electrode 19 is greater than that of the above embodiment. Will also be shorter. Accordingly, the diameter of the conductive fine particles used for the conductive material 43 may be smaller in the present modification than in the above-described embodiment. For example, the positions of the fine particles are shifted on the plane and run on the OVC layer 24. Even so, compared with the above embodiment, the influence on the gap of the liquid crystal layer can be reduced by the smaller diameter of the fine particles.

  FIG. 9 is an explanatory diagram of a liquid crystal device 3 according to a second modification of the present invention. As shown in the drawing, the color filter layer 22 of the liquid crystal device 3 is formed such that the colored layer 22a is thicker than the black matrix 22b, and a part of the periphery overlaps the adjacent black matrix 22b. . A part of the black matrix 22b is exposed between the adjacent colored layers 22a. The electrostatic shield layer 40 is formed so as to cover the surface of the color filter layer 22.

  Similar to the liquid crystal device 2, a contact hole 42 is formed on the counter substrate 20 side, and the black matrix 22 b and the electrostatic shield layer 40 are electrically connected to the conductive material 43.

  According to this modification, the same effect as the liquid crystal device 2 is obtained. That is, since the electrostatic shield layer 40 is formed so as to cover the surface of the black matrix 22b, a mask alignment mark for forming the electrostatic shield layer 40 is formed on the black matrix 22b when the black matrix 22b is formed. be able to. As a result, the electrostatic shield layer 40 having an arbitrary shape can be formed at an appropriate position with respect to the substrate body 21. Also in this modified example, since the black matrix 22b is interposed between the substrate body 21 and the electrostatic shield layer 40, the distance between the electrostatic shield layer 40 and the common electrode 19 is shorter than that in the above embodiment. Become. Accordingly, the diameter of the conductive fine particles used for the conductive material 43 may be smaller in the present modification than in the above-described embodiment. For example, the positions of the fine particles are shifted on the plane and run on the OVC layer 24. Even so, compared with the above embodiment, the influence on the gap of the liquid crystal layer can be reduced by the smaller diameter of the fine particles.

  In addition, the liquid crystal device 3 of this modification also has an effect different from that of the liquid crystal device 2. That is, since the electrostatic shield layer 40 is formed to cover the surface of the colored layer 22a, the electrostatic shield layer 40 can prevent the impurities contained in the colored layer 22a from being eluted. Further, since the electrostatic shield layer 40 is formed so as to cover the surface of the color filter layer 22, when the thicknesses of the OVC layer 24 and the alignment film 25 do not change, the electrostatic shield layer 40 and the liquid crystal layer 50 The interval does not change. Therefore, in a series (that is, a series) of liquid crystal devices in which the color filter layer 22 has a different configuration, for example, the thickness of the colored layer 22a is different, but at least the thicknesses of the OVC layer 24 and the alignment film 25 are not changed. Since the influence of static electricity on the liquid crystal may be considered to be the same, the design related to driving of the liquid crystal when the electrostatic shield layer 40 is provided becomes easy. As a result, for example, only the film thickness of the colored layer 22a is different, and the cost (and time) required for the design can be reduced in the case of manufacturing a liquid crystal device having a common series with other configurations.

  By the way, the liquid crystal device 2 or the liquid crystal device 3 of the modified example is a distance from the electrostatic shield layer 40 to the liquid crystal layer 50 as compared with the liquid crystal device 1 (1a) of the embodiment, as is clear from the above description. Becomes shorter. As a result, in the liquid crystal device 2 or the liquid crystal device 3, the Coulomb force due to static electricity captured by the electrostatic shield layer 40 is stronger than the liquid crystal device 1 (1 a), and the liquid crystal layer 50 is easily affected. However, in the liquid crystal devices 2 and 3 having the above-described configuration, the black matrix 22b and the electrostatic shield layer 40 cooperate to capture static electricity from the external environment in the same manner as the liquid crystal device 1 (1a). Then, it is discharged to the routing wiring 18. Therefore, a liquid crystal device in which image display disturbance due to the influence of static electricity is suppressed can be obtained.

  In the liquid crystal device 2 and the liquid crystal device 3, the electrostatic shield layer 40 extends to the position of the conductive material 43. For example, the electrostatic shield layer 40 is only extended to the display region side from the position of the conductive material 43. Without forming, the ITO or the like forming the electrostatic shield layer 40 is formed in an independent state (island state) from the electrostatic shield layer 40 at the position of the conductive material 43. Thus, the conductive material 43 and the black matrix 22b may be connected to each other.

[Electronics]
Next, an embodiment of the electronic device of the present invention will be described. FIG. 10 is a perspective view showing an example of an electronic apparatus according to the invention. A cellular phone (electronic device) 1300 illustrated in FIG. 10 includes the liquid crystal device of the present invention as a small-sized display portion 1301, and includes a plurality of operation buttons 1302, an earpiece 1303, and a mouthpiece 1304. . Accordingly, a mobile phone 1300 including a display unit that is configured by the liquid crystal device of the present invention and suppresses display disturbance due to static electricity can be provided.

  The liquid crystal device of each of the embodiments is not limited to the mobile phone, but is an electronic book, a projector, a personal computer, a digital still camera, a television receiver, a viewfinder type or a monitor direct-view type video tape recorder, a car navigation device, and a pager. , Electronic notebooks, calculators, word processors, workstations, videophones, POS terminals, devices equipped with touch panels, etc., and can be suitably used as an image display means. An electronic device including a display portion with high quality can be provided.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but it goes without saying that the present invention is not limited to such examples. Various shapes, combinations, and the like of the constituent members shown in the above-described examples are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

  DESCRIPTION OF SYMBOLS 1,1a, 2,3 ... Liquid crystal device, 9 ... Pixel electrode, 10 ... Element substrate (1st substrate), 12 ... Gate insulating film (insulating film), 13 ... Interlayer insulating film (insulating film), 14 ... Between electrodes Insulating film (insulating film), 18 ... lead-out wiring, 19 ... common electrode, 20 ... counter substrate (second substrate), 22 ... color filter layer, 22a ... colored layer, 22b ... black matrix (metal light shielding layer), 22c ... Opening 24, overcoat layer (insulating layer), 25 ... alignment film, 40 ... electrostatic shielding layer (electrostatic shielding layer), 43 ... conductive material, 44 ... conductive film, 50 ... liquid crystal layer, 1300 ... mobile phone (Electronic device), A ... display area.

Claims (9)

A liquid crystal layer is sandwiched between the first substrate and the second substrate, a pixel electrode and a common electrode are formed on the first substrate, and the liquid crystal is generated by an electric field generated between the pixel electrode and the common electrode. A lateral electric field type liquid crystal device to be driven,
On the surface of the liquid crystal layer side of the second substrate, the pixel collector Goku及 beauty electrostatic shielding layer on the inter-pixel electrode and the counter position is formed, on the surface of the liquid crystal layer side of the electrostatic shielding layer, A metal light-shielding layer is formed between the pixel electrodes,
On the surface of the first substrate on the liquid crystal layer side, a drive circuit and a lead wiring electrically connected to the drive circuit are provided,
The lead wiring, the electrostatic shielding layer, and the metal shielding layer are electrically electrically connected to each other in a planar manner through a conductive material sandwiched between the first substrate and the second substrate. Connected,
The potential of the electrostatic shielding layer is controlled to a predetermined potential by the drive circuit.
A liquid crystal device characterized by that. Orientation film is formed on the surface of the liquid crystal layer side of the front Symbol electrostatic shielding layer,
Having an insulating layer between the electrostatic shielding layer and the alignment film;
The liquid crystal device according to claim 1, wherein the insulating layer is a colored layer or an overcoat layer which is a material for forming a color filter layer. The potential of the electrostatic shielding layer, the liquid crystal device according to claim 1 or 2, characterized in that it is controlled to the same potential as the potential of the common electrode. Said lead-out line, the conductive material for electrically connecting the electrostatic shield layer or the metal light-shielding layer according to claims 1, characterized in that it is a plurality of locations arranged in any one of 3 LCD device. The first substrate has an insulating film covering the routing wiring,
The insulating film is provided with a contact hole in which a part of the routing wiring is exposed to the bottom,
Inside the contact hole, a conductive film is formed to cover the routing wiring exposed at the bottom,
The electrostatic shielding layer or the metal light shielding layer is a liquid crystal according to claim 1, any one of 4, characterized in that in conduction with the conductive member and the lead wirings through said conductive film apparatus. The liquid crystal device according to claim 5, wherein the conductive film is made of a conductive metal oxide. The pixel electrode and the common electrode are stacked via an insulating film on the liquid crystal layer side of the first substrate,
The liquid crystal device according to claim 1, wherein the common electrode is provided closer to the liquid crystal layer than the pixel electrode. Around the liquid crystal layer, a sealing material for sealing liquid crystal molecules is provided,
A display area formed by a plurality of the pixel electrodes is provided inside the area surrounded by the sealing material, and is inside the area surrounded by the sealing material, the display area and the A non-display area is provided between the sealing material and
In the non-display area of the first substrate, an electrostatic protection member that discharges static electricity entering the display area is disposed,
The liquid crystal device according to claim 1, wherein the electrostatic shielding layer is provided so as to overlap the electrostatic protection member in a planar manner. An electronic apparatus comprising the liquid crystal device according to claim 1.