JP2010085861A - Liquid crystal display, and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new structure having a color-filter substrate and an array substrate bonded together. <P>SOLUTION: The liquid crystal display 100 uses double-sided adhesive tape 15 as a sealing material for bonding together the color filter substrate 11 and the array substrate 12. The double-sided adhesive tape 15 bonds together the color filter substrate 11 and the array substrate 12, peripherally around a pixel area 10a. In the internal area (pixel area 10a), enclosed by the color filter substrate 11, the array substrate 12 and the double-sided adhesive tape 15, and a liquid crystal material is sealed to form a liquid crystal layer 13. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a liquid crystal display device and a method for manufacturing the same. In particular, the present invention relates to a structure in which a color filter substrate (CF substrate) and an array substrate (TFT substrate) are bonded together.

  For example, as disclosed in Japanese Patent Application Laid-Open No. 2008-170516, a liquid crystal display device is formed by bonding a color filter substrate and an array substrate and enclosing a liquid crystal material between the two substrates. Has been.

  In the color filter substrate, for example, a black matrix is formed on a glass substrate in order to prevent unnecessary light leakage, and then a colored layer of R (red), G (green), and B (blue) is patterned. . In such a color filter substrate, a protective film is formed as necessary, and then a counter electrode facing the pixel electrode of the array substrate is formed. The counter electrode is formed of, for example, an ITO (Indium Tin Oxide) film. Such a color filter substrate is sometimes called a “CF substrate”.

  In the array substrate, for example, gate wirings and source wirings are arranged in a matrix on a glass substrate. An active element such as a thin film transistor (TFT) is formed at the intersection of the gate wiring and the source wiring, and a pixel electrode is connected to the active element. Such an array substrate is sometimes referred to as a “TFT substrate”.

  The liquid crystal display device is made into a panel by bonding the color filter substrate and the array substrate. In the bonding step, for example, a thermosetting or photocurable sealing material is drawn on the outer periphery of the display area of the array substrate by a dispenser. Thereafter, the color filter substrates are overlaid and heated or exposed to light to cure the uncured sealing material. In addition, as a method for injecting a liquid crystal material, a method (vacuum injection method) in which a liquid crystal material is vacuum-injected from an injection port previously formed in a sealing material after the above bonding is known. Also known is a method (drop injection method) in which an appropriate amount of a liquid crystal material is dropped inside the drawn sealing material before the bonding.

  Further, for example, a transfer that electrically connects the color filter substrate and the array substrate may be provided in the gap between the color filter substrate and the array substrate. In this case, for example, a transfer material made of a thermosetting conductive material is applied to either the color filter substrate or the array substrate with a dispenser. Then, after the color filter substrate and the array substrate are bonded together, the transfer material may be cured to form a transfer.

In addition, in the color filter manufacturing process, the array manufacturing process, the panel manufacturing process, etc., considering the productivity, a so-called mother glass substrate having a size for a plurality of panels flows through the process, and the size for a plurality of panels. Manufactures panels. Thereafter, the mother glass substrate is cut and cut into the size of the single panel (product size), and the single liquid crystal display panel is manufactured.
JP 2008-170516 A

  By the way, in the step of attaching the color filter substrate and the array substrate to form a panel, a thermosetting or photocurable sealing material is drawn with a dispenser, and then the color filter substrate and the array substrate are bonded together. The sealing material drawn by the dispenser spreads in the width direction when sandwiched between the color filter substrate and the array substrate. FIG. 11 is a plan view showing a state in which the sealing material 200 drawn by the dispenser is sandwiched between the color filter substrate 11 and the array substrate 12. At this time, as shown in FIG. 11, there is a case where a difference occurs in the spreading direction in the width direction of the sealing material 200, and the width of the sealing material 200 may be uneven. In order to stabilize the sealing performance of the liquid crystal material and the adhesive strength between the color filter substrate and the array substrate, the width of the sealing material 200 is desired to be as uniform as possible. For this reason, it can be considered that the dispenser for drawing the sealing material is made thin and the sealing material is drawn finely. However, it is difficult to make the width of the sealing material uniform even by such correspondence.

  In view of such problems, the present invention proposes a completely new structure for a structure in which a color filter substrate and an array substrate are bonded together.

  The liquid crystal display device according to the present invention includes a double-sided tape in which the periphery of the pixel region of the color filter substrate and the array substrate is bonded along the circumferential direction. A liquid crystal material is sealed in an inner region surrounded by the color filter substrate, the array substrate, and the double-sided tape. According to this liquid crystal display device, the sealing material for bonding the color filter substrate and the array substrate is supplied in the form of a tape. For this reason, the shape of the sealing material is stable, and unevenness in the thickness and width of the sealing material can be suppressed to be small.

  The double-sided tape may contain conductive particles that conduct electricity in the thickness direction of the double-sided tape. The color filter substrate and the array substrate may have electrodes facing each other with a double-sided tape interposed therebetween, and the electrodes may be electrically connected by the double-sided tape. In this case, the color filter substrate and the array substrate can be electrically connected by a double-sided tape that bonds the color filter substrate and the array substrate.

  Also, in the method for manufacturing a liquid crystal display device according to the present invention, the color filter substrate and the array substrate are arranged so as to face each other, and the periphery of the pixel region of the color filter substrate and the array substrate is bonded with a double-sided tape along the circumferential direction. A bonding step (A) is included. In this case, the sealing material is in the form of a tape, the shape of the sealing material for bonding the color filter substrate and the array substrate is stable, and unevenness in the thickness and width of the sealing material can be kept small.

  In this case, the bonding step (A) includes the step (A1) of applying a double-sided tape along the circumferential direction around the pixel region of either one of the color filter substrate and the array substrate, and the double-sided tape. And a step (A2) of bonding both substrates together. Further, in this case, in the bonding step (A), after the step (A1), the liquid crystal material is supplied to the pixel region surrounded by the double-sided tape of the one substrate, and then the step (A2) is performed. May be.

  Further, in the bonding step (A), a gap is formed in a part of the double-sided tape attached along the circumferential direction, and the pixels surrounded by the double-sided tape from the gap after the bonding step (A). A liquid crystal material may be supplied to the region.

The double-sided tape includes conductive particles that conduct electricity in the thickness direction of the double-sided tape, and the color filter substrate and the array substrate each have an electrode around the pixel region, and in the bonding step (A) The electrode of the color filter substrate and the electrode of the array substrate may be opposed to each other with a double-sided tape interposed therebetween, and the electrodes may be electrically connected by the double-sided tape.
Thereby, the process of bonding the color filter substrate and the array substrate and the process of electrically connecting the color filter substrate and the array substrate can be realized by the same common process, and the manufacturing work of the liquid crystal display device can be simplified.

  Hereinafter, a liquid crystal display device and a manufacturing method thereof according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 schematically shows a cross-sectional configuration of a liquid crystal display device 100 according to an embodiment of the present invention. Here, first, the structure of the liquid crystal display device 100 will be schematically described, and then the bonding structure of the color filter substrate 11 and the array substrate 12 of the liquid crystal panel 10 with respect to the liquid crystal display device 100 will be described.

  As shown in FIG. 1, the liquid crystal display device 100 includes a liquid crystal panel 10 and a backlight 20.

  The liquid crystal panel 10 generally has a rectangular shape as a whole, and is composed of a pair of translucent substrates 11 and 12 (glass substrate). In this embodiment, the front side of both the substrates 11 and 12 is the color filter substrate 11 (CF substrate), while the back side is the array substrate 12. In an actual manufacturing process, a large base material called mother glass that can cut out a plurality of single liquid crystal panels is used. Here, for convenience of explanation, the substrates 11 and 12 will be described mainly using a single liquid crystal panel as an example.

  In this embodiment, as shown in FIG. 1, the color filter substrate 11 and the array substrate 12 each have a pixel region 10a (region in which pixels are formed) in the center. The color filter substrate 11 and the array substrate 12 are arranged to face each other, and a sealing material 15 is provided so as to surround the periphery (outer peripheral edge portion) of the pixel region 10a in the circumferential direction. In this embodiment, a double-sided tape 15 is used as such a sealing material. That is, in this embodiment, the color filter substrate 11 and the array substrate 12 are bonded together by the double-sided tape 15 along the circumferential direction around the pixel region 10a. The bonding structure of the color filter substrate 11 and the array substrate 12 will be described in detail later.

  A liquid crystal layer 13 is provided between the color filter substrate 11 and the array substrate 12. The liquid crystal layer 13 is filled with a liquid crystal material containing liquid crystal molecules. In such a liquid crystal material, the orientation of liquid crystal molecules is manipulated in accordance with the application of an electric field between the color filter substrate 11 and the array substrate 12, and the optical specification changes. The double-sided tape 15 as a sealing material has a function of sealing the liquid crystal material of the liquid crystal layer 13 and a function of bonding the color filter substrate 11 and the array substrate 12 together.

  Hereinafter, the array substrate 12 and the color filter substrate 11 will be described in order. 2 to 4 illustrate the pixel region 10 a of the liquid crystal panel 10. FIG. 2 shows a cross-sectional view of the state in which the color filter substrate 11 and the array substrate 12 are bonded together. 3 shows a plan view of the pixel region portion of the array substrate 12, and FIG. 4 shows a plan view of the pixel region portion of the color filter substrate 11. As shown in FIG. A region surrounded by a broken line A in FIGS. 3 and 4 indicates a region constituting one pixel of the liquid crystal display device 100.

  In this embodiment, as shown in FIGS. 2 and 3, the array substrate 12 includes a pixel electrode 42, bus lines 43 a to 43 c (bus line), a planarization layer on the front side (liquid crystal layer 13 side) of the glass substrate 41. 44, an alignment film 46, and a thin film transistor 47 are formed. The pixel electrode 42 is made of ITO (indium-tin oxide), which is a transparent conductive material, and a voltage corresponding to an image is given to the pixel electrode 42 through bus lines 43a to 43c and a thin film transistor 47 (see FIG. 3). Supplied at timing. The planarization layer 44 is formed of an insulating material and covers the pixel electrode 42 and the bus lines 43a to 43c (see FIG. 3). A horizontal alignment film 46 made of polyimide or the like is formed on the planarizing layer 44. The surface of the alignment film 46 is subjected to an alignment process in order to determine the alignment direction of the liquid crystal molecules when no voltage is applied.

  2 and 4, the color filter substrate 11 has a black matrix 52, a color filter 53, a planarization layer 54, a counter electrode 55, and an alignment film 56 on the back side (liquid crystal layer 13 side) of the glass substrate 51. Is formed. The black matrix 52 is formed of a metal such as Cr (chromium) in order to prevent light from passing through the region between the pixels. The color filter 53 has three colors of red (R), green (G), and blue (B). As shown in FIGS. 2 to 4, one pixel electrode 42 of the array substrate 12 has R, G, and B colors. Any one color filter 53 is opposed. As shown in FIG. 4, the planarization layer 54 is formed so as to cover the black matrix 52 and the color filter 53, and a counter electrode made of ITO (indium-tin oxide) is provided below the planarization layer 54. 55 is formed. A horizontal alignment film 56 is formed below the counter electrode 55. The surface of the alignment film 56 is also subjected to an alignment process. The alignment direction of the alignment film 46 of the array substrate 12 and the alignment direction of the alignment film 56 of the color filter substrate 11 are different by 90 °.

  As shown in FIG. 2, the glass substrates 41 and 51 are arranged with a spherical or cylindrical spacer 59 (spherical in the illustrated example) sandwiched therebetween. The spacer 59 is made of, for example, plastic or glass. The gap between the glass substrates 41 and 51 is held by the sealing material 15 (see FIG. 1) and the spacer 59 described above, and the liquid crystal layer 13 is kept constant.

  Further, as shown in FIGS. 1 and 2, polarizing plates 17 and 18 are attached to the surface side of the color filter substrate 11 (glass substrate 41) and the upper surface side of the glass substrate 51, respectively. In the so-called normally white type liquid crystal display device, the polarizing axes of the two polarizing plates 17 and 18 are arranged so as to be orthogonal to each other. In the so-called normally black liquid crystal display device, the polarization axes of the two polarizing plates 17 and 18 are arranged in parallel. In this embodiment, as shown in FIG. 1, a bezel 30 is attached to the front side of the liquid crystal panel 10. A frame 32 is attached to the back side of the liquid crystal panel 10. The bezel 30 and the frame 32 support the liquid crystal panel 10. Further, the frame 30 has an opening corresponding to the pixel region 10 a of the liquid crystal panel 10. A backlight 20 supported by a case 24 is mounted on the back side of the liquid crystal panel 10.

  As shown in FIG. 1, the backlight 20 is an external light source disposed on the back side of the liquid crystal panel 10 (the lower side in FIG. 1). In this embodiment, the backlight 20 includes a plurality of light sources 22 (for example, cold cathode tubes) and a case 24 that houses the light sources 22. The case 24 has a box shape opened toward the front side (the liquid crystal panel 10 side), and the light sources 22 are arranged in parallel in the case 24. A plurality of optical sheets 26 are stacked and disposed in the opening of the case 24. The optical sheet 26 has, for example, a diffusion plate, a diffusion sheet, a lens sheet, and a brightness enhancement sheet in order from the back side. The case 24 is attached to the back side of the frame 32 with the backlight 20 facing the liquid crystal panel 10 described above. At this time, the optical sheet 26 is sandwiched between the back surface of the frame 32 of the liquid crystal panel 10 and the surface of the case 24.

  The liquid crystal display device 100 operates liquid crystal molecules in the liquid crystal layer 13 by applying a controlled voltage to the color filter substrate 11 and the array substrate 12 to the liquid crystal panel 10. Then, the liquid crystal panel 10 blocks or allows the light of the backlight 20 to be blocked by operating the liquid crystal molecules in the liquid crystal layer 13. In addition, the liquid crystal display device 100 displays a desired image while controlling the luminance of the backlight 20 and the like.

  Hereinafter, a bonding structure of the color filter substrate 11 and the array substrate 12 of the liquid crystal panel 10 will be described. 5 and 6 are a plan view and a cross-sectional view schematically showing a bonding structure of the color filter substrate 11 and the array substrate 12 of the liquid crystal panel 10.

  As described above, the liquid crystal display device 100 uses a double-sided tape as the sealing material 15 for bonding the color filter substrate 11 and the array substrate 12 together. In this embodiment, as shown in FIGS. 5 and 6, the double-sided tape 15 has the color filter substrate 11 and the array substrate 12 bonded together around the pixel region 10a in the circumferential direction. A liquid crystal layer 13 is formed by sealing a liquid crystal material in an inner region (pixel region 10 a) surrounded by the color filter substrate 11, the array substrate 12, and the double-sided tape 15.

  7A to 7F schematically show a process of bonding the color filter substrate 11 and the array substrate 12 together. The double-sided tape 15 is supplied in a state of being sandwiched between two laminators 81 and 82, for example, as shown in FIG. At this time, it is cut in accordance with a predetermined shape surrounding the pixel region 10 a of the array substrate 12. Next, as shown in FIG. 7B, the double-sided tape 15 is left on one laminator 81 and the other laminator 82 is peeled off. Next, as shown in FIGS. 7C and 7D, the double-sided tape 15 remaining on one laminator 81 is pasted around the pixel region 10a of the array substrate 12 in this embodiment. Next, as shown in FIG. 7E, the laminator 81 is peeled off while leaving the double-sided tape 15 on the array substrate 12. Then, as shown in FIG. 7 (f), the color filter substrate 11 is bonded to the array substrate 12 with the double-sided tape 15.

  Thus, the bonding step (A) for bonding the color filter substrate 11 and the array substrate 12 is performed along the circumferential direction around the pixel region 10a of either one of the color filter substrate 11 and the array substrate 12. The step (A1) of applying the double-sided tape 15 and the step (A2) of attaching both the substrates 11 and 12 with the double-sided tape 15 can be configured. In the embodiment described above, the double-sided tape 15 is attached to the array substrate 12 and then the color filter substrate 11 is attached. However, the double-sided tape 15 is attached to the color filter substrate 11 and then the array substrate 12 is attached. Good. In this embodiment, the double-sided tape 15 is kneaded with conductive particles 90, and reference numeral 90 in FIGS. 7A to 7F schematically shows the conductive particles 90. .

  In this embodiment, the liquid crystal material is supplied to an inner region surrounded by the color filter substrate 11, the array substrate 12, and the double-sided tape 15. For this reason, the double-sided tape 15 has a required function for sealing the liquid crystal material. Such a double-sided tape 15 is preferably made using, for example, an adhesive resin such as an acrylic adhesive or a silicon adhesive. In addition, a photocurable resin (for example, an acrylic photocurable resin) or the like that can be molded by applying light, a thermosetting resin (for example, a silicon-based thermosetting resin), or the like by heat Resin that can be molded can be used.

  The step of supplying the liquid crystal material to the liquid crystal layer 13 is, for example, a state in which the double-sided tape 15 is pasted around the pixel region 10a of the array substrate 12 in the bonding step (A) as shown in FIG. In FIG. 8, a liquid crystal material 13a may be supplied to the pixel region 10a of the array substrate 12 surrounded by the double-sided tape 15. Thereafter, as shown in FIG. 7F, the color filter substrate 11 and the array substrate 12 may be bonded together. As described above, the step of supplying the liquid crystal material 13a to the liquid crystal layer 13 is performed after the step (A1) of sticking the double-sided tape 15 to one substrate in the step (A) of attaching the color filter substrate 11 and the array substrate 12. The liquid crystal material may be supplied to the inner region surrounded by the double-sided tape 15 of the one substrate, and then both substrates may be bonded together.

  As another method, as shown in FIG. 9, in the bonding step (A) in which the color filter substrate 11 and the array substrate 12 are bonded, one side of the double-sided tape 15 bonded along the circumferential direction of the pixel region 10a. A gap 15a may be formed in the part, and the liquid crystal material may be supplied from the gap 15a to the pixel region 10a surrounded by the double-sided tape 15. In this case, the gap 15a may be sealed after supplying the liquid crystal material.

  Further, in the liquid crystal display device 100, the double-sided tape 15 includes conductive particles 90 that conduct electricity in the thickness direction of the double-sided tape 15 as shown in FIG. The color filter substrate 11 and the array substrate 12 have electrodes 61 and 62 that face each other across the double-sided tape 15, and the electrodes 61 and 62 are electrically connected by the double-sided tape 15.

  For example, as shown in FIG. 10A, the double-sided tape 15 including the conductive particles 90 is made of a conductive material 90 (for example, a gold granular material) on a liquid material or a paste-like material of an adhesive resin 150. And a mixture 151 in which particles are coated with a thin film of gold). Specifically, as shown in FIG. 10B, the mixture 151 may be sandwiched between laminators 81 and 82 and formed into a tape shape. In this embodiment, it is preferable that the conductive particles 90 have substantially the same particle diameter. As this electroconductive particle 90, if it is a commercially available thing, the "conductive micropearl AU" by Sekisui Chemical Co., Ltd. can be used, for example. In this embodiment, the thickness of the double-sided tape 15 is approximately the same as the particle diameter of the conductive particles 90 so that the conductive particles 90 are slightly exposed on the surface of the double-sided tape 15. In this case, when the double-sided tape 15 is molded, the resin 150 may be molded while being appropriately pressed by the laminators 81 and 82.

  In this embodiment, as shown in FIGS. 10A and 10B, not only the conductive particles 90 but also the nonconductive particles 91 are added to the liquid material or paste-like material of the resin 150 having adhesiveness. Mixing. In this case, as shown in FIG. 6, when the double-sided tape 15 is formed, conductive particles 90 and non-conductive particles 91 are included. Electricity is passed through the conductive particles 90 in the thickness direction of the double-sided tape 15. The nonconductive particles 91 mixed in the double-sided tape 15 function as a spacer that maintains the thickness of the double-sided tape 15. The conductive particles 90 are composed of particles coated with a conductive metal such as gold, for example, and are more expensive than the nonconductive particles 91. As in this embodiment, the manufacturing cost can be kept low by mixing inexpensive non-conductive particles 91 appropriately. In this case, it is more preferable that the conductive particles 90 have a slightly larger particle diameter than the non-conductive particles 91. Thereby, the electroconductive particle 90 can be more reliably exposed to the surface of the double-sided tape 15, and the electroconductivity of the double-sided tape 15 can be ensured more reliably. As the conductive particles 90, for example, “conductive micropearl AU” manufactured by Sekisui Chemical Co., Ltd. can be used, and as the nonconductive particles 91, for example, “Micropearl” manufactured by the same company can be used. Can be used.

  In this case, the double-sided tape 15 can conduct electricity in the thickness direction through the conductive particles 90. The conductive particles 90 need only be included in the double-sided tape 15 at a density suitable for electrically connecting the opposing electrodes 61 and 62 of the color filter substrate 11 and the array substrate 12 electrically. The double-sided tape 15 is affixed along the circumferential direction of the color filter substrate 11 and the array substrate 12, but the conductive particles 90 are not continuously connected in the circumferential direction. Do not conduct electricity in the circumferential direction.

  As described above, the color filter substrate 11 and the array substrate 12 have various electrical drive circuits formed in the pixel region. A wiring for sending a signal to the drive circuit extends to the outer peripheral edge of each of the substrates 11 and 12. In this embodiment, as shown in FIG. 6, the color filter substrate 11 and the array substrate 12 have electrodes 61 and 62 disposed so as to face each other with the double-sided tape 15 sandwiched between the outer peripheral edges. The electrodes 61 and 62 are electrically connected by the double-sided tape 15.

  According to the liquid crystal display device 100, the conductive particles 90 are included in the double-sided tape 15 as a sealing material so as to exhibit conductivity in the thickness direction. For this reason, the double-sided tape 15 electrically connects the opposing electrodes of the color filter substrate 11 and the array substrate 12. For this reason, a configuration (for example, transfer) for electrically connecting the color filter substrate 11 and the array substrate 12 can be omitted or simplified. The double-sided tape 15 includes conductive particles 90 and can pass an electrical signal in the thickness direction.

  The liquid crystal display device 100 according to one embodiment of the present invention has been described above. According to the liquid crystal display device 100, the sealing material 15 for bonding the color filter substrate 11 and the array substrate 12 is supplied in a tape form. The double-sided tape 15 has a more stable shape than the liquid or paste-like material supplied by the dispenser. Moreover, since it can handle via base materials, such as a laminator, as mentioned above, handling (handling) is good and workability | operativity is also good. For this reason, the shape of the sealing material 15 is more stable than the case where the sealing material is drawn by a dispenser, the color filter substrate 11 and the array substrate 12 are bonded, and then the sealing material is cured. The occurrence of unevenness in the thickness and width can be further reduced.

  Moreover, as shown in FIG. 6, the double-sided tape 15 may include conductive particles 90 that conduct electricity in the thickness direction. In this case, the color filter substrate 11 and the array substrate 12 can be electrically connected to the electrodes 61 and 62 facing each other with the double-sided tape 15 interposed therebetween. With this structure, the color filter substrate 11 and the array substrate 12 can be electrically connected by the double-sided tape 15 that bonds the color filter substrate 11 and the array substrate 12 together. For this reason, the double-sided tape 15 has the functions of bonding the color filter substrate 11 and the array substrate 12, sealing the liquid crystal layer 13, and electrically connecting the color filter substrate 11 and the array substrate 12. The configuration of the liquid crystal panel 10 can be simplified. Accordingly, the process of bonding the color filter substrate 11 and the array substrate 12 and the process of electrically connecting the color filter substrate 11 and the array substrate 12 can be realized by the same common process, and the liquid crystal display device The manufacturing work can be simplified.

  The liquid crystal display device 100 and the manufacturing method thereof according to an embodiment of the present invention have been described above, but the liquid crystal display device 100 according to the present invention is not limited to the above-described embodiment.

  For example, the specific configuration of the double-sided tape is not limited to the above-described embodiment, and the tape material, the material of the conductive particles, and the like can be variously changed. Further, the specific configurations of the liquid crystal panel and the liquid crystal display device are not limited to the above-described embodiments. In the embodiment described above, for the sake of convenience, a single liquid crystal panel is described as an example. The actual manufacturing process is performed using a large base material called mother glass that can cut out a plurality of single liquid crystal panels. The present invention can be applied to a manufacturing form using such a mother glass substrate (mother substrate).

  For example, in the above-described embodiment, the double-sided tape contains not only conductive particles but also non-conductive particles, but the double-sided tape may contain only conductive particles. Moreover, although the form which contains the electroconductive particle in the double-sided tape was illustrated, this invention employ | adopts a double-sided tape as a sealing material which bonds a color filter board | substrate and an array board | substrate first. In this case, it is not always essential to include conductive particles. In this case, for example, only non-conductive particles may be mixed as a spacer without mixing conductive particles in the double-sided tape.

1 is a cross-sectional view illustrating a liquid crystal display device according to an embodiment of the present invention. 1 is a cross-sectional view showing a liquid crystal panel of a liquid crystal display device according to an embodiment of the present invention. 1 is a plan view showing a pixel region portion of an array substrate of a liquid crystal display device according to an embodiment of the present invention. 1 is a plan view showing a pixel region portion of a color filter substrate of a liquid crystal display device according to an embodiment of the present invention. 1 is a schematic plan view of a liquid crystal panel of a liquid crystal display device according to an embodiment of the present invention. VI-VI sectional drawing of FIG. (A)-(f) is a figure which shows the bonding process of a color filter substrate and an array board | substrate regarding the liquid crystal panel of the liquid crystal display device which concerns on one Embodiment of this invention. The figure which shows the process of supplying liquid crystal material regarding the liquid crystal panel of the liquid crystal display device which concerns on one Embodiment of this invention. The schematic plan view of the liquid crystal panel of the liquid crystal display device which concerns on other embodiment of this invention. (A) And (b) is a perspective view which shows the manufacturing process of the double-sided tape of the liquid crystal display device which concerns on one Embodiment of this invention. The figure which shows the sealing material of a liquid crystal panel.

Explanation of symbols

10 Liquid crystal panel 10a Pixel region 11 Color filter substrate (CF substrate, translucent substrate)
12 Array substrate (TFT substrate, translucent substrate)
13 Liquid crystal layer 15 Double-sided tape (seal material)
15a Gap 17, 18 Polarizing plate 20 Backlight 22 Light source 24 Case 26 Optical sheet 30 Bezel 32 Frame 41 Glass substrate (glass substrate of array substrate)
42 pixel electrode 43a-43c bus line 44 planarization layer 46 alignment film 47 thin film transistor 51 glass substrate (glass substrate of color filter substrate)
52 Black matrix 53 Color filter 54 Flattening layer 55 Counter electrode 56 Orientation film 59 Spacers 61, 62 Opposite electrodes 81, 82 of color filter substrate and array substrate Laminator 90 Conductive particle 91 Non-conductive particle 100 Liquid crystal display device 150 Resin 151 mixture

Claims (7)

A color filter substrate;
An array substrate disposed to face the color filter substrate;
A double-sided tape bonded around the pixel region of the color filter substrate and the array substrate along the circumferential direction;
A liquid crystal display device, wherein a liquid crystal material is sealed in an inner region surrounded by the color filter substrate, the array substrate, and the double-sided tape. The double-sided tape contains conductive particles that conduct electricity in the thickness direction of the double-sided tape,
The liquid crystal display device according to claim 1, wherein the color filter substrate and the array substrate have electrodes facing each other with the double-sided tape interposed therebetween, and the electrodes are electrically connected by the double-sided tape.   A liquid crystal display device comprising: a bonding step (A) in which a color filter substrate and an array substrate are disposed so as to face each other, and a periphery of a pixel region of the color filter substrate and the array substrate is bonded with a double-sided tape along a circumferential direction. Production method. The bonding step (A)
A step (A1) of applying a double-sided tape along the circumferential direction around the pixel region of one of the color filter substrate and the array substrate;
The manufacturing method of the liquid crystal display device of Claim 3 provided with the process (A2) which bonds both substrates together with the said double-sided tape.   The said bonding process (A) supplies a liquid-crystal material to the area | region enclosed with the double-sided tape of the said one board | substrate after the said process (A1), and performs the said process (A2) after that. 5. A method for producing a liquid crystal display device according to 4.   In the bonding step (A), a gap is formed in a part of the double-sided tape attached along the circumferential direction, and the region surrounded by the double-sided tape from the gap after the bonding step (A) The method for manufacturing a liquid crystal display device according to claim 3, wherein a liquid crystal material is supplied to the liquid crystal display device. The double-sided tape contains conductive particles that conduct electricity in the thickness direction of the double-sided tape,
The color filter substrate and the array substrate each have an electrode around the pixel region,
The electrode of the said color filter board | substrate and the electrode of an array board | substrate are mutually opposed in the said bonding process (A) on both sides of the said double-sided tape, The said electrode is electrically connected by the said double-sided tape. A method for producing a liquid crystal display device according to any one of the above.