JP6671207B2 - Liquid crystal display - Google Patents

Description

  The present invention relates to a technique for suppressing a defect caused by static electricity generated by an external factor in a segment display type liquid crystal display device.

  A general liquid crystal display device mainly includes a pair of substrates, electrodes provided on one surface of each substrate, a liquid crystal layer provided between the substrates, and a pair of polarizing plates provided outside each substrate. It is prepared as. In such a liquid crystal display device, for example, a protective film may be provided on the surface of each polarizing plate in order to prevent the outside from being damaged before the use is started. In this case, when the protective film is peeled off, static electricity is generated and the liquid crystal display device is charged, so that the orientation of the liquid crystal layer is changed in a region (non-display portion) that is not a portion that is originally used for display, and the appearance is reduced. Thus, the display can be visually recognized as a change in the display. In such a case, it may take a long time before the changed state of the display disappears. Such a problem is not limited to the case where the protective film is peeled off, but may be caused by static electricity generated by an external factor.

  Regarding the inconvenience caused by the static electricity as described above, for example, Japanese Patent Application Laid-Open No. 2008-170812 (Patent Document 1) discloses that an electrostatic ground pattern is formed on the outer peripheral portion of a liquid crystal display area, and one end of the electrostatic ground pattern is A liquid crystal display element has been disclosed that has a configuration in which it is connected to a GND terminal and the other end is electrically opened, thereby removing static electricity and improving noise resistance to suppress occurrence of display malfunction.

  Further, for example, in Japanese Patent Application Laid-Open No. 10-10551 (Patent Document 2), the upper substrate on which signal electrodes are formed and the lower substrate on which scanning electrodes are formed are insulated from each other and provided in a liquid crystal sealed region. A pair of dummy electrodes extending from the outside of the sealing material are arranged, and a point-like conductive member is provided at least between the dummy electrodes outside the sealing material to electrically connect the two dummy electrodes to each other. Accordingly, a liquid crystal display device has been disclosed in which charges accumulated on each substrate can be moved.

  Also, for example, Japanese Patent Application Laid-Open No. 2008-40307 (Patent Document 3) discloses that one transparent substrate is provided with a segment electrode composed of an electrode representing a character or a figure and a lead, and a conductive film independently formed on the segment electrode. Provide a transparent electrode having a portion and a common electrode composed of an electrode representing a character or a figure and a lead lead, and a transparent electrode having a conductive film portion formed independently of the common electrode on the other transparent substrate, A liquid crystal display device having a configuration in which conductive films are electrically connected to each other is disclosed.

  By the way, a segment display type liquid crystal display device often includes a plurality of unit display areas that represent a symbol (such as a number) having one meaning by combining a plurality of segment display units. For example, in the case of a segment display type liquid crystal display device that expresses a two-digit number, two unit display regions each including the above-described plurality of segment display units are arranged side by side. Such a segment display type liquid crystal display device is still insufficient as a countermeasure against static electricity even with the above-described conventional technology, and a display defect occurs in a region sandwiched between two unit display regions in plan view. May occur.

  More specifically, since wiring lines for electrically connecting the segment electrodes or the common electrodes included in each of the two unit display regions are usually arranged between the two unit display regions, static electricity is generated in the region. This is because it is difficult to provide a dummy electrode or the like for countermeasures. Even if the above-described conventional technology is applied, it is possible to cope with static electricity around the unit display area in a plan view, but no effective countermeasure is shown between the two unit display areas. For this reason, a technique for further reducing the time required for eliminating display defects caused by static electricity is desired. In the above, a case where two unit display areas are provided for simplicity of explanation has been described as an example, but the same applies to a liquid crystal display device having more than two unit display areas.

JP 2008-170812 A JP-A-10-10551 JP 2008-40307 A

  A specific mode according to the present invention has an object to provide a technique capable of further reducing the time required for eliminating a problem caused by static electricity.

[1] A liquid crystal display device according to one embodiment of the present invention includes (a) a first substrate and a second substrate which are arranged to face each other, and (b) a liquid crystal layer provided between the first substrate and the second substrate. (C) a sealing material provided around the liquid crystal layer in a region where the first substrate and the second substrate overlap with each other in plan view; and (d) in both the first substrate and the second substrate , anda neutralizing electrode provided on the inner side of the region in plan view, to express the (e) the region (such as numbers) symbol has the meaning each one by combining a plurality of segment display portions A plurality of unit display areas, and an inter-segment area existing between the unit display areas in a plan view, and (f) the plurality of segments in each of the plurality of unit display areas. The display can be turned on and off independently In and, (g) the neutralization electrode is to draw the overhang portion which is disposed in a region overlapping with the inter-segment region, to the outside of the position or the sealing member overlaps the overhang portion and the connected and the sealing material A conductive portion having a turned portion, and (h) an electrical connection between the static elimination electrodes of both the first substrate and the second substrate to make them equal in potential; (i) The static elimination electrode has a gap in the inter-segment region, and (j) a fine wiring electrically connecting the plurality of unit display regions to the first substrate or the second substrate. Is provided, and the thin wiring is arranged in the gap .
[2] The liquid crystal display device according to one embodiment of the present invention includes (a) a first substrate and a second substrate which are arranged to face each other, and (b) a liquid crystal layer provided between the first substrate and the second substrate. (C) a sealing material provided around the liquid crystal layer in a region where the first substrate and the second substrate overlap with each other in plan view; and (d) in both the first substrate and the second substrate, (E) the region expresses a symbol (such as a number) having one meaning by combining a plurality of segment display portions in the region. A plurality of unit display areas, and an inter-segment area existing between the unit display areas in a plan view, and (f) the plurality of segments in each of the plurality of unit display areas. The display can be turned on and off independently (G) the electrode for static elimination is provided with a projecting portion arranged in a region overlapping the inter-segment region, and a position connected to the projecting portion and extending to a position overlapping with the sealing material or outside the sealing material. (H) electrically connecting between the static elimination electrodes of both the first substrate and the second substrate to have the same potential, and i) The first substrate or the second substrate is provided with a thin wire for electrically connecting the plurality of unit display areas to each other, and a position where the thin wire overlaps with the sealing material or the seal. It is a liquid crystal display device arranged outside the material.

  According to the above configuration, it is possible to further reduce the time required to resolve the problem caused by static electricity in the inter-segment region.

FIG. 1 is a cross-sectional view illustrating a configuration of the liquid crystal display device according to the first embodiment. FIG. 2 is a plan view illustrating a configuration of the liquid crystal display device according to the first embodiment. FIG. 3 is a plan view illustrating a configuration of the second substrate in the liquid crystal display device according to the first embodiment. FIG. 4 is a plan view illustrating a configuration of the first substrate in the liquid crystal display device according to the first embodiment. FIG. 5 is an enlarged view of a portion A shown in FIG. FIG. 6 is a plan view illustrating a configuration of a second substrate in the liquid crystal display device according to the second embodiment. FIG. 7 is a plan view illustrating the configuration of the first substrate in the liquid crystal display device according to the second embodiment. FIG. 8 is an enlarged view of a portion B shown in FIG. FIG. 9 is a plan view illustrating a configuration of a second substrate in the liquid crystal display device according to the third embodiment. FIG. 10 is a plan view illustrating the configuration of the first substrate in the liquid crystal display device according to the third embodiment. FIG. 11 is an enlarged view of a portion C shown in FIG. FIG. 12 is a plan view illustrating the configuration of the second substrate in the liquid crystal display device according to the fourth embodiment. FIG. 13 is a plan view illustrating the configuration of the first substrate in the liquid crystal display device according to the fourth embodiment. FIG. 14 is a plan view illustrating a configuration of an insulating film provided on one surface of the second substrate. FIG. 15 is an enlarged view of a portion D shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(1st Embodiment)
FIG. 1 is a cross-sectional view illustrating a configuration of the liquid crystal display device according to the first embodiment. The liquid crystal display device includes a first substrate 11 and a second substrate 12, which are arranged to face each other, a first electrode 13 provided on the first substrate 11, a second electrode 14 provided on the second substrate 12, A liquid crystal layer 17 disposed between the substrate 11 and the second substrate 12 is provided as a basic configuration. The liquid crystal display device of the present embodiment is configured so that the region where the electrodes overlap each other forms a character or a pattern to be displayed, and can basically display only predetermined characters and the like, and generally has an area within the effective display region. This is a segment display type liquid crystal display device in which an area of at most 70% or less, usually 50% or less, contributes to the display of characters and the like. Note that the liquid crystal display device may be a mixture of a segment display type and a dot matrix type.

  Each of the first substrate 11 and the second substrate 12 is a rectangular substrate in plan view, and is arranged to face each other. As the first substrate 11 and the second substrate 12, for example, a transparent substrate such as a glass substrate or a plastic substrate can be used. As shown in the figure, for example, a large number of spacers are uniformly dispersed between the first substrate 11 and the second substrate 12, and the gap between the two substrates is a desired size (for example, about several μm) by the spacers. It is kept in.

  The first electrode 13 is provided on one surface side of the first substrate 11. Similarly, the second electrode 14 is provided on one surface side of the second substrate 12. The first electrode 13 and the second electrode 14 are each formed by appropriately patterning a transparent conductive film such as indium tin oxide (ITO). Although not shown, an insulating film may be further provided on the upper surface of each electrode.

  The first alignment film 15 is provided on one surface side of the first substrate 11 so as to cover the first electrode 13. The second alignment film 16 is provided on one surface side of the second substrate 12 so as to cover the second electrode 14. As the first alignment film 15 and the second alignment film 16, a vertical alignment film that regulates the alignment state of the liquid crystal layer 17 to vertical alignment is used. Each of the alignment films 15 and 16 is subjected to a uniaxial alignment process such as a rubbing process, and has an alignment regulating force in one direction. The direction of the alignment process on each of the alignment films 15 and 16 is set, for example, to be alternate (anti-parallel).

  The liquid crystal layer 17 is provided between the first substrate 11 and the second substrate 12. In the present embodiment, the liquid crystal layer 17 is composed of a liquid crystal material having a negative dielectric anisotropy Δε, containing no chiral material, and having fluidity (that is, a liquid material). The liquid crystal layer 17 of the present embodiment is in a state in which the orientation direction of the liquid crystal molecules when no voltage is applied is inclined in one direction, and is approximately 88 ° or more with respect to each substrate surface of the first substrate 11 and the second substrate 12. The angle is set to be substantially vertical with a pretilt angle within a range of less than °. Then, when a voltage is applied between the first electrode 13 and the second electrode 14, the liquid crystal molecules of the liquid crystal layer 17 are aligned in the direction regulated by the alignment process.

  The first polarizing plate 21 is arranged outside the first substrate 11. Similarly, the second polarizing plate 22 is arranged outside the second substrate 12. The first polarizing plate 21 and the second polarizing plate 22 are arranged, for example, such that their absorption axes are substantially orthogonal to each other. A viewing angle compensator such as a C plate may be appropriately disposed between each polarizing plate and each substrate.

  FIG. 2 is a plan view illustrating a configuration of the liquid crystal display device according to the first embodiment. As shown in the figure, the liquid crystal display device according to the present embodiment has two unit display areas that are variably represented by combining one of seven segment display sections and variably expressing one number that is a symbol having one meaning. By doing so, it is a segment display type liquid crystal display device that expresses two digits. Each of the segment display sections constituting each of the unit display areas 30a and 30b has an overlapping area of four first electrodes 13 each functioning as a common electrode and four second electrodes 14 each functioning as a segment electrode. , And can be turned on and off independently by multiplex driving.

  The extraction electrodes C1, C2, C3, and C4 are provided on the upper end side of one surface of the second substrate 12, respectively. These extraction electrodes C1 and the like are for applying a drive voltage to the first electrode 13 functioning as a common electrode. The extraction electrodes S1, S2, S3, and S4 are provided on the upper end of one surface of the second substrate 12, respectively. These extraction electrodes S1 and the like are for applying a drive voltage to the second electrode 14 functioning as a segment electrode.

  The sealing material 19 is provided in a frame shape substantially along the outer edge of the region where the first substrate 11 and the second substrate 12 overlap, and fixes the two substrates and seals the liquid crystal layer 17 between the two substrates. . In addition, the sealing material 19 is provided linearly along the end on the lower side of each substrate in the drawing, and is opened at a portion substantially at the center. This opening is an inlet for forming the liquid crystal layer 17 and is closed by a sealing material. Generally, the inside surrounded by the sealing material 19 corresponds to the effective display area (effective display section), and the portion other than the segment display section is a non-display section that does not change display.

  Here, the “unit display area” can be defined as, for example, a minimum area including all of a plurality of segment display units necessary for displaying a symbol having one meaning in plan view. An area existing between the unit display areas 30a and 30b is defined as an inter-segment area 31. Here, the “inter-segment region” can be defined as, for example, a region sandwiched between the unit display regions 30a and 30b adjacent to each other in plan view. In the illustrated example, between the two adjacent unit display areas 30a and 30b, a part of the outer edges of the unit display areas 30a and 30b is defined as an area included in a range facing each other in plan view (FIG. Medium, patterned area). Hereinafter, the configuration of the liquid crystal display device that can reduce the time for eliminating the display defect caused by the static electricity in the inter-segment region 31 will be described in detail.

  FIG. 3 is a plan view illustrating a configuration of the second substrate in the liquid crystal display device according to the first embodiment. FIG. 3 shows a state in which the second substrate 12 is viewed in plan from the side where the second electrode 14 is formed. As shown in FIG. 3, each of the second electrodes 14 functions as a segment electrode, and is provided on one surface of the second substrate 12. Here, the one corresponding to the unit display area 30a is indicated as “second electrode 14a”, and the one corresponding to the unit display area 30b is indicated as “second electrode 14b”.

  Each second electrode 14a is connected to one of the extraction electrodes S1 and S2 via a lead wiring. Each second electrode 14b is connected to one of the extraction electrodes S3 and S4 via a lead wiring. A voltage can be applied to each of the second electrodes 14a, 14b from an external driving device (not shown) via these extraction electrodes S1, S2, S3, S4.

  The static elimination electrode 40 surrounds the area where the second electrodes 14a and 14b are present, in other words, the area where the unit display areas 30a and 30b (see FIG. 2) are present. , Are provided over a wide area over each of the lower sides. Here, the “electrode for static elimination” is for discharging (static elimination) static electricity generated by an external factor and accumulated in each substrate or the like to the outside of the liquid crystal display device (the same applies to the following description).

  In the drawing, as the formation range of the charge removing electrode 40 is indicated by hatching so that the formation range of the charge removing electrode 40 is easily understood, the charge removing electrode 40 extends to a range overlapping with the sealing material 19 on three sides of the second substrate 12. Is provided. The static elimination electrode 40 has a projecting portion 40a provided so as to overlap the lower portion in plan view of the inter-segment region 31 interposed between the unit display regions 30a and 30b. Note that a portion other than the overhang portion 40a and extending to the sealing material 19 corresponds to a “conductive portion” (the same applies to the following).

  The charge removing electrode 41 is provided mainly over a region sandwiched between the lead wires of each of the two second electrodes 14a and 14b. In the drawing, as the formation range of the charge removing electrode 41 is represented by a hatched pattern so as to be easily understood, the charge removing electrode 41 extends to a range overlapping with the sealing material 19 on the upper side of the second substrate 12. Is provided. The static elimination electrode 41 has a projecting portion 41 a provided so as to overlap the upper portion in the plan view of the inter-segment region 31. A gap is provided between the overhang portion 40a and the overhang portion 41a. A portion extending to the sealing material 19 other than the overhang portion 41a corresponds to a “conductive portion” (the same applies to the following).

  FIG. 4 is a plan view illustrating a configuration of the first substrate in the liquid crystal display device according to the first embodiment. FIG. 4 shows a state in which the first substrate 11 is viewed in a plan view from the side opposite to the side on which the first electrode 13 is formed. As shown in FIG. 4, each of the first electrodes 13 functions as a common electrode, and is provided on one surface of the first substrate 11. Here, the one corresponding to the unit display area 30a is indicated as “first electrode 13a”, and the one corresponding to the unit display area 30b is indicated as “first electrode 13b”.

  Each of the first electrodes 13a is connected to one of the first electrodes 13b via a routing wiring. Each of the first electrodes 13b is connected to the second substrate 12 via conductive particles contained in the sealing material 19 at pad portions C11, C12, C13, and C14 provided on the upper end side of the first substrate 11 in the drawing. Is connected to any of the extraction electrodes C1, C2, C3, and C4 (see FIG. 3) provided at the first position. Note that a conductive material may be separately provided without using the sealing material 19 as a conductive material (the same applies to the following description). The conductive material is a material containing conductive particles such as carbon particles, silver particles, and gold-coated particles.

  The static elimination electrode 50 is provided over a wide area on each of the left side, right side, and lower side of the first substrate 11 so as to surround the area where the unit display areas 30a and 30b (see FIG. 2) exist. In the drawing, as the formation range of the charge removing electrode 50 is indicated by hatching so that the formation range of the charge removing electrode 50 is easily understood, the charge removing electrode 50 extends to a range overlapping with the sealing material 19 on three sides of the first substrate 11. Is provided. The static elimination electrode 50 has a projecting portion 50a provided so as to overlap the lower portion in plan view of the inter-segment region 31 sandwiched between the unit display regions 30a and 30b. The static elimination electrode 50 also functions as the first electrodes 13a and 13b corresponding to the lower two segment display portions in each of the unit display areas 30a and 30b.

  The charge removing electrode 51 is provided over a wide range from the center to the upper side of the first substrate 11 so as to surround the region where the unit display regions 30a and 30b (see FIG. 2) exist. In the drawing, as the formation range of the charge removing electrode 51 is indicated by a hatched pattern so as to be easily understood, the charge removing electrode 51 is provided up to a range overlapping with the sealing material 19 on the upper side of the first substrate 11. Have been. The static elimination electrode 51 has a projecting portion 51a provided so as to overlap the upper portion in plan view of the inter-segment region 31 sandwiched between the unit display regions 30a and 30b. The static elimination electrode 51 also functions as the first electrodes 13a and 13b corresponding to the upper two segment display portions in each of the unit display areas 30a and 30b.

  FIG. 5 is an enlarged view of a portion A shown in FIG. As shown in the figure, a slight gap is provided between the overhang portions 50a and 51a. In this gap, each of the two left first electrodes 13a and the right two first electrodes 13b in plan view is provided. The thin wiring that connects between them is arranged. The gaps between the overhang portions 40a and 41a shown in FIG. 3 are also ensured corresponding to the areas where these thin routing wirings are arranged. In this example, the gap between the overhang portions 50a and 51a is provided near the center in the vertical direction of the inter-segment region 31, but the position where the gap is provided is not limited to this.

  With the configuration as described above, the thin lead-out wiring for connecting most of the inter-segment region 31, specifically, between the two first electrodes 13 a on the left and the two first electrodes 13 b on the right is arranged. In all the regions except for the region to be removed, the static elimination electrodes are disposed on both the first substrate 11 side and the second substrate 12 side, and the static elimination electrodes 40 and 50, and the static elimination electrodes 41 and 51. Are electrically connected to each other through a sealing material 19 as a conductive material, and are made equal in potential. Thereby, even if static electricity is applied from the outside, the effect of quickly removing electricity can be obtained, so that there is no lighting problem, or even if it occurs, the effect of turning off the light early is obtained.

(2nd Embodiment)
The basic configuration of the liquid crystal display device according to the second embodiment is the same as that of the above-described first embodiment, and differs mainly in the structure of the charge removing electrode. In the following, the same reference numerals are used for configurations common to the first embodiment, and detailed description thereof will be omitted. Differences will be described in detail.

  FIG. 6 is a plan view illustrating a configuration of a second substrate in the liquid crystal display device according to the second embodiment. FIG. 6 shows a state in which the second substrate 12 is viewed in plan from the side where the second electrode 14 is formed.

  The charge removing electrode 140 is provided near the center in the left-right direction on the lower side of the second substrate 12. In the figure, as the formation range of the charge removing electrode 140 is represented by a hatched pattern so as to be easily understood, the charge removing electrode 140 is provided on the lower side of the second substrate 12 in a plan view. Is provided so as to partially overlap. The static elimination electrode 140 has a projecting portion 140a provided so as to overlap the lower portion in plan view of the inter-segment region 31 sandwiched between the unit display regions 30a and 30b.

  The static elimination electrode 141 is provided to have a thin portion extending over the upper side of the second substrate 12 and a portion extending near the center of the second substrate 12 in plan view. In the drawing, as the formation range of the electrode 141 for static elimination is represented by a hatched pattern so as to be easily understood, the electrode 141 for static elimination extends to a range overlapping with the sealing material 19 on the upper side of the second substrate 12. Is provided. The static elimination electrode 141 has a projecting portion 141a provided so as to overlap with the upper portion of the inter-segment region 31 in plan view. A gap is provided between the overhang portion 140a and the overhang portion 141a.

  Further, on one surface of the second substrate 12, the second electrodes 14 a and 14 b and the lead-out wiring connected thereto, the respective electrodes for static elimination 140 and 141, and the regions where the respective projecting portions 140 a and 141 a are not provided are opposed to each other. A dummy electrode is provided. Among them, for example, the counter dummy electrode provided on the left side, the lower side, and the right side of the second substrate 12 is connected to the left side via a thin crossover wiring provided at a position overlapping the sealant 19 on the lower side. The conduction on the right side is ensured. The other opposing dummy wirings are all provided on the upper side of the second substrate 12 so as to partially overlap with the sealing material 19, and are provided on the first substrate 11 side via the sealing material 19 as a conductive material. The continuity with the static elimination electrode and the like provided in the device is secured.

  FIG. 7 is a plan view illustrating the configuration of the first substrate in the liquid crystal display device according to the second embodiment. FIG. 7 shows a state in which the first substrate 11 is viewed in plan from the side opposite to the side on which the first electrode 13 is formed.

  The neutralization electrode 150 is provided near the center in the left-right direction on the lower side of the first substrate 11. In the figure, as the formation range of the charge removing electrode 150 is represented by a hatched pattern so that the formation range can be easily understood, the charge removing electrode 150 is disposed on the lower side of the first substrate 11 in a plan view. Is provided so as to partially overlap. The static elimination electrode 150 has a projecting portion 150a provided so as to overlap the lower portion in plan view of the inter-segment region 31 sandwiched between the unit display regions 30a and 30b.

  The static elimination electrode 151 is provided to have a narrow portion extending over the upper side of the first substrate 11 and a portion extending near the center of the first substrate 11 in plan view. In the drawing, as the formation range of the electrode 151 for static elimination is represented by a hatched pattern so that it can be easily understood, the electrode 151 for static elimination extends to a range overlapping with the sealing material 19 on the upper side of the first substrate 11. Is provided. The static elimination electrode 151 has a protruding portion 151a provided so as to overlap the upper portion of the inter-segment region 31 in plan view. A gap is provided between the overhang portion 150a and the overhang portion 151a. This is because each of the static elimination electrodes 150 and 151 is connected to and integrated with the separate first electrodes 13a and 13b, so that it is necessary to insulate the two.

  FIG. 8 is an enlarged view of a portion B shown in FIG. As shown in the figure, in order to secure conduction between the extraction electrode C1 and the first electrodes 13a and 13b to be connected, a position outside the sealing material 19 on the upper side of the first substrate 11 (the sealing material 19). (A position that does not overlap with) is provided with a crossover wiring 160 that connects the two. Since it is provided outside the sealing material 19, abnormal lighting does not occur in the intersection area with the extraction electrode on the second substrate 12 side. The insulation may be ensured by forming an insulating film on the substrate, arranging a flexible film lead wire in a gap between both substrates, or filling an ultraviolet curing resin or the like.

  With the above-described configuration, the first substrate 11 side and the second substrate 12 side in most of the inter-segment region 31, specifically, in all regions except the gap between the overhang portions 150 a and 150 b, etc. The static elimination electrode 140 and the static elimination electrode 150, and the static elimination electrode 141 and the static elimination electrode 151 are electrically connected to each other via the sealing material 19 as a conductive material. The potential is set. Thereby, even if static electricity is applied from the outside, the effect of quickly removing electricity can be obtained, so that there is no lighting problem, or even if it occurs, the effect of turning off the light early is obtained.

(Third embodiment)
The basic configuration of the liquid crystal display device according to the third embodiment is the same as that of the above-described first embodiment and the like, and differs mainly in the structure of the charge removing electrode. In the following, the same components as those in the first embodiment and the like will be denoted by the same reference numerals, and detailed description thereof will be omitted. Differences will be described in detail.

  FIG. 9 is a plan view illustrating a configuration of a second substrate in the liquid crystal display device according to the third embodiment. FIG. 9 shows a state in which the second substrate 12 is viewed in plan from the side where the second electrode 14 is formed.

  The static elimination electrode 240 is provided from the lower side to the upper side near the center of the second substrate 12 in the left-right direction. In the drawing, the charge eliminating electrode 240 is provided on the lower side of the second substrate 12 with the sealing material 19 in plan view so that the formation range of the charge eliminating electrode 240 is represented by a hatched pattern so as to be easily understood. Is provided so as to partially overlap. The static elimination electrode 240 has a projecting portion 240a provided so as to substantially overlap the whole of the inter-segment region 31 interposed between the unit display regions 30a and 30b in plan view.

  Further, on one surface of the second substrate 12, each of the second electrodes 14 a, 14 b, the leading wiring connected thereto, the neutralizing electrode 240, and the counter dummy electrode are provided in a region where the overhanging portion 240 a is not provided. I have. Among them, for example, the counter dummy electrode provided on the left side, the lower side, and the right side of the second substrate 12 is connected to the left side via a thin crossover wiring provided at a position overlapping the sealant 19 on the lower side. The conduction on the right side is ensured. The other opposing dummy wirings are provided on the upper side of the second substrate 12 so as to partially overlap with the sealing material 19, and are provided on the first substrate 11 side via the sealing material 19 as a conductive material. The continuity with the static elimination electrode and the like provided in the device is secured.

  FIG. 10 is a plan view illustrating the configuration of the first substrate in the liquid crystal display device according to the third embodiment. FIG. 10 shows a state in which the first substrate 11 is viewed in plan from the side opposite to the side on which the first electrode 13 is formed.

  The charge removing electrode 250 is provided from the lower side to the upper side near the center of the first substrate 11 in the left-right direction. In the figure, the discharging electrode 250 is provided on the lower side of the first substrate 11 with the sealing material 19 in a plan view so that the forming range of the discharging electrode 250 is represented by a hatched pattern so as to be easily understood. Is provided so as to partially overlap. The static elimination electrode 250 has a projecting portion 250a provided so as to substantially overlap the whole of the inter-segment region 31 interposed between the unit display regions 30a and 30b in plan view. Further, the charge eliminating electrode 250 is formed integrally with each one of the first electrodes 13a and 13b. In other words, a part of the charge eliminating electrode 250 also serves as each of the first electrodes 13a and 13b.

  FIG. 11 is an enlarged view of a portion C shown in FIG. As shown in the figure, continuity is ensured between the charge removing electrode 250 of the first substrate 11 and the charge removing electrode 240 of the second substrate 12 via the sealing material 19 as a conductive material. Thereby, the potential between the charge removing electrode 250 and the charge removing electrode 240 is made equal. In addition, the potentials between the first electrodes 13a and 13b of the first substrate 11 and the corresponding dummy electrodes provided on the second substrate 12 corresponding thereto are similarly set to the same potential.

  With the above-described configuration, in most of the inter-segment region 31, specifically, in the region where each overhang portion 250 a is provided, the static elimination electrodes are arranged on both the first substrate 11 side and the second substrate 12 side. In addition, conduction between the charge removing electrode 240 and the charge removing electrode 250 is ensured via the sealing material 19 as a conductive material, and the potential is made the same. Thereby, even if static electricity is applied from the outside, the effect of quickly removing electricity can be obtained, so that there is no lighting problem, or even if it occurs, the effect of turning off the light early is obtained.

(Fourth embodiment)
The basic configuration of the liquid crystal display device of the fourth embodiment is the same as that of the above-described first embodiment and the like, and differs mainly in the structure of the charge removing electrode. In the following, the same components as those in the first embodiment and the like will be denoted by the same reference numerals, and detailed description thereof will be omitted. Differences will be described in detail.

  FIG. 12 is a plan view illustrating the configuration of the second substrate in the liquid crystal display device according to the fourth embodiment. FIG. 12 shows a state in which the second substrate 12 is viewed in plan from the side where the second electrode 14 is formed.

  The neutralizing electrode 340 is arranged on the left side and the right side of the second substrate 12 so as to surround the area where the second electrodes 14a and 14b are present, in other words, the area where the unit display areas 30a and 30b (see FIG. 2) are present. , Are provided over a wide area over each of the lower sides. In the drawing, as the formation range of the charge removing electrode 340 is represented by a hatched pattern so that it can be easily understood, the charge removing electrode 340 is a sealing material in plan view on the lower side of the second substrate 12 or the like. 19 is provided so as to partially overlap. The static elimination electrode 340 has a projecting portion 340a provided so as to substantially overlap the whole of the inter-segment region 31 between the unit display regions 30a and 30b in plan view.

  Further, on one surface of the second substrate 12, opposing dummy electrodes are provided in a region where the second electrodes 14a and 14b, the leading wiring connected thereto, the charge removing electrode 340, and the overhang portion 340a are not provided. I have. Each of the opposing dummy wirings is provided on the upper side of the second substrate 12 so as to partially overlap with the sealing material 19, and is provided on the first substrate 11 side via the sealing material 19 as a conductive material. The continuity of the static elimination electrode and the like is ensured.

  FIG. 13 is a plan view illustrating the configuration of the first substrate in the liquid crystal display device according to the fourth embodiment. FIG. 13 shows a state where the first substrate 11 is viewed in a plan view from the side opposite to the side on which the first electrode 13 is formed.

  The charge eliminating electrode 350 is arranged on the left side and the right side of the first substrate 11 so as to surround the area where the first electrodes 13a and 13b are present, in other words, the area where the unit display areas 30a and 30b (see FIG. 2) are present. , Are provided over a wide area over each of the lower sides. In the drawing, as the formation range of the charge removing electrode 350 is indicated by a hatched pattern so that the formation range can be easily understood, the charge removing electrode 350 is a sealing material in plan view on the lower side of the first substrate 11 or the like. 19 is provided so as to partially overlap. The static elimination electrode 350 has a projecting portion 350a provided so as to substantially overlap the whole of the inter-segment region 31 between the unit display regions 30a and 30b in plan view. The static elimination electrode 350 is formed integrally with each one of the first electrodes 13a and 13b. In other words, a part of the charge eliminating electrode 350 also serves as each of the first electrodes 13a and 13b.

FIG. 14 is a plan view illustrating a configuration of an insulating film provided on one surface of the second substrate. As shown in the drawing, the insulating film 60 is formed inside the outer edge of the sealing material 19 and widely over substantially the entire second substrate 12. Further, the insulating film 61 is formed in a range corresponding to the crossover wiring (details will be described later) in the portion D shown in FIG. As the insulating films 60 and 61, for example, a SiO ₂ film can be used.

  FIG. 15 is an enlarged view of a portion D shown in FIG. Each first electrode 13b has each of the crossover wirings 360, 361, 362, 363 arranged so as to overlap with the seal portion 19. The crossover wiring 360 is directly connected to one first electrode 13a. The other crossover wires 361, 362, 363 are connected to the jumper wires 371, 372, 373 on the second substrate 14 side via the sealing material 19 as a conductive material, and each first electrode is connected via each jumper wire 371, etc. 13a. In this example, each jumper wiring 371 and the like are formed as a part of the opposing dummy electrode provided on the second substrate 12 side, and are provided at positions overlapping the sealing material 19. At this time, each of the crossover wirings and the jumper wirings partially overlaps the extraction electrode and the like provided on the second substrate 12 side in a plan view, and it is necessary to insulate these parts. Therefore, the above-described insulating film 61 is provided on the second substrate 12. By stacking the first substrate 11 and the second substrate 12 with the insulating film 61 interposed therebetween, it is possible to equalize the potential of each electrode of both substrates without providing a gap in the inter-segment region 31.

  Although each of the crossover wirings is provided at a position overlapping with the sealing material 19, some or all of the crossover wirings may be arranged outside the sealing material 19. In this case, abnormal lighting can be suppressed even when the wiring intersects with the routing wiring of the second substrate or without the insulating film. In this case, the insulating property may be ensured by disposing a flexible film lead wire, an ultraviolet curable resin, or the like in the gap between the two substrates.

  With the above configuration, in most of the inter-segment region 31, specifically, in the region where each overhang portion 350 a is provided, the static elimination electrodes are arranged on both the first substrate 11 side and the second substrate 12 side. In addition, conduction between the charge removing electrode 340 and the charge removing electrode 350 is ensured via the sealing material 19 as a conductive material, and the potential is made the same. Thereby, even if static electricity is applied from the outside, the effect of quickly removing electricity can be obtained, so that there is no lighting problem, or even if it occurs, the effect of turning off the light early is obtained.

(Example)
Next, an embodiment of a liquid crystal display device to which the present invention is applied will be described.

  As a first substrate and a second substrate, a pair of blue glass substrates (thickness: 0.7 mm) having a conductive film made of ITO formed on one surface are prepared. In order to make the conductive film of each glass substrate a pattern corresponding to a desired display pattern, patterning is performed by photolithography and etching. At this time, the charge removing electrode portion and the like are simultaneously formed in a shape corresponding to any of the first to fourth embodiments.

Next, an insulating film made of SiO ₂ or the like is formed in a desired in-plane pattern shape so as to cover at least the effective display portion on one surface (electrode surface) of each substrate. Next, a vertical alignment film is applied so as to include at least the inside of the effective display section similarly to the insulating film, and is baked at 180 ° C. to 220 ° C.

  Next, the vertical alignment film is rubbed in one direction with a cotton rubbing cloth having a cloth thickness of about 2.8 mm to 3.2 mm. The rubbing conditions are such that the pretilt angle of the completed liquid crystal display device is 88.5 ° to 89.9 °.

  A seal material is printed in a frame shape on a surface of one of the substrates (for example, the first substrate) on which the alignment film is formed, so as to surround at least a region larger than the effective display portion. A glass fiber spacer having a diameter of 4.2 μm and a plastic ball coated with gold having a diameter of 4.5 μm to ensure conduction between both substrates are added to the sealing material by 1.5 wt% each.

On the other substrate (for example, the second substrate), plastic ball spacers having a diameter of 4.0 μm are sprayed at a density of 100 pieces / mm ² by a dry spraying method.

  The first substrate and the second substrate are superimposed on each other so that the surfaces on which the alignment films are formed face each other, and are fired at 150 ° C. while both substrates are pressed. The firing time is set to a time necessary and sufficient for the sealing material to cure.

  Next, a liquid crystal material having a negative dielectric anisotropy is injected between the bonded first and second substrates by a vacuum injection method, and the injection port is sealed with an ultraviolet curable resin. Heat treatment is performed for one hour.

  After the substrate surfaces of the two substrates that have been bonded are washed with a neutral detergent, a desired viewing angle compensator and a polarizing plate are bonded to the surface of each substrate in the lamination order shown above.

  Since the lead-out electrodes are arranged on the portion of the one substrate (the second substrate) side whose outer shape protrudes outward from the other substrate (the first substrate), a lead frame and an anisotropic conductive member are provided for those portions. Bonding the flexible film and the driver IC via the conductive film.

  Finally, an external drive circuit is connected to the extraction electrode, and a reflection plate or a backlight is provided below the rear polarizing plate, whereby a liquid crystal display device is completed. In the liquid crystal display device of this embodiment, the lower substrate (second substrate) of the panel portion is 27.5 mm long × 25 mm wide and the length of the extraction electrode portion is 2.5 mm. The effective display portion is about 22 mm inside the 25 mm square region where both substrates are overlapped, and a seal portion is formed within the remaining 3 mm.

  It should be noted that the present invention is not limited to the contents of the above-described embodiment, and can be implemented with various modifications within the scope of the present invention.

11: first substrate 12: second substrate 13: first electrode 14: second electrode 15: first alignment film 16: second alignment film 17: liquid crystal layer 19: sealing material 21: first polarizing plate 22: second Polarizing plate 30, 31: Electrode part for static elimination 30a, 31a: Overhanging electrode part

Claims (3)

A first substrate and a second substrate that are arranged to face each other;
A liquid crystal layer provided between the first substrate and the second substrate;
A sealing material provided around the liquid crystal layer in a region where the first substrate and the second substrate overlap with each other in plan view;
On both the first substrate and the second substrate, an electrode for static elimination provided inside the region in plan view;
Including
The region includes a plurality of unit display area is representative of a symbol (such as numbers) have the meaning each one by combining a plurality of segment display portions, therebetween of the respective unit display area in a plan view Existing inter-segment areas,
The plurality of segment display units in each of the plurality of unit display areas can be turned on and off independently,
The static elimination electrode,
An overhanging portion arranged in an area overlapping the inter-segment area,
A conductive portion that is connected to the overhang portion and has a portion that overlaps with the sealing material or a portion that is routed to the outside of the sealing material,
Have a,
The electric potential eliminating electrodes of both the first substrate and the second substrate are electrically connected to have the same potential,
The static elimination electrode has a gap in the inter-segment region,
The first substrate or the second substrate is provided with a fine wiring for electrically connecting the plurality of unit display areas to each other, and the fine wiring is arranged in the gap.
Liquid crystal display. A first substrate and a second substrate that are arranged to face each other;
A liquid crystal layer provided between the first substrate and the second substrate;
A sealing material provided around the liquid crystal layer in a region where the first substrate and the second substrate overlap with each other in plan view;
On both the first substrate and the second substrate, an electrode for static elimination provided inside the region in plan view;
Including
The region includes a plurality of unit display regions each of which represents a symbol (such as a number) having one meaning by combining a plurality of segment display units, and a plurality of unit display regions between each of the unit display regions in plan view. Existing inter-segment areas,
The plurality of segment display units in each of the plurality of unit display areas can be turned on and off independently,
The static elimination electrode,
An overhanging portion arranged in an area overlapping the inter-segment area,
A conductive portion that is connected to the overhang portion and has a portion that overlaps with the sealing material or a portion that is routed to the outside of the sealing material,
Has,
The electric potential eliminating electrodes of both the first substrate and the second substrate are electrically connected to have the same potential,
The first substrate or the second substrate is provided with a thin wire for electrically connecting the plurality of unit display areas to each other, and a position where the thin wire overlaps with the sealing material or a position of the sealing material. Located on the outside,
Liquid crystal display. The sealing material also serves as a conductive material, and the static elimination electrodes of both the first substrate and the second substrate are electrically connected via the sealing material.
The liquid crystal display device according to claim 1 .

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