JP2007065037A - Liquid crystal display panel and manufacturing method of liquid crystal display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reliably cure a starting and ending overlapping part of a sealing material when the sealing material is drawn in a liquid crystal dropping and bonding system by a dispenser drawing method. <P>SOLUTION: In a liquid crystal display panel 20a which is provided with an active matrix substrate 1 and a counter substrate 2 disposed opposite to each other and a liquid crystal layer 6 provided between the both substrates 1 and 2 and wherein a display region 10a and a non-display region 10b on the periphery thereof are regulated, a frame-shaped seal part 3 having a linear part 3b having a narrow width and a wide width part 3a having the width wider than that of the linear part 3b and constituted of a photosetting material is provided between both substrates 1 and 2 in the non-display region 10b, light shielding wiring lines 7a for display are patterned on the active matrix substrate 1 and a black matrix 4 formed along an inner peripheral edge of the seal part 3 and having a notched part 4a in a position corresponding to the wide width part 3a is provided on the counter substrate 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a liquid crystal display panel and a method for manufacturing the liquid crystal display panel, and more particularly to a liquid crystal display panel manufactured by a liquid crystal dropping and bonding method using a dispenser drawing method.

  In the manufacture of a liquid crystal display panel, a pair of glass substrates provided with various electrodes, thin film transistor arrays, and the like are bonded to each other with a sealing material so as to be opposed to each other at an extremely narrow interval of about several μm, and then the substrates. A method of forming a liquid crystal layer by filling and sealing a liquid crystal material in between is widely used.

  The method for forming the liquid crystal layer is, for example, as follows.

  First, after applying a sealing material in a frame shape so as to have a liquid crystal injection port for injecting a liquid crystal material on the outer periphery of a predetermined cell of one glass substrate under normal pressure, it is bonded to the other glass substrate. Press and cure. Next, the pair of bonded substrates is divided into a predetermined cell size or the like so that the liquid crystal injection port comes to the end. Further, under a vacuum, a liquid crystal material is injected from the liquid crystal injection port into the panel divided into the predetermined cell size. Finally, the liquid crystal injection port of the panel into which the liquid crystal material is injected is sealed.

  In the method of forming the liquid crystal layer, it is necessary to separately perform a bonding process for bonding two glass substrates and an enclosing process for enclosing the liquid crystal material.

  In view of this, Patent Documents 1 and 2 propose a method capable of simultaneously performing the bonding step and the liquid crystal sealing step. Specifically, the liquid crystal material is dropped on one glass substrate on which a seal portion made of a seal material is formed, and then the substrate and the other substrate are bonded together under vacuum, and the liquid crystal is dropped and bonded. It is called a method.

  In this liquid crystal dropping and laminating method, the liquid crystal material is sealed in the panel at the time when the pair of glass substrates are bonded, and thus the seal portion needs to be formed in a closed loop having no opening portion such as the liquid crystal injection port.

  Here, as a method for forming the seal portion, a screen printing method in which a seal material is printed in a predetermined shape using a mesh plate having an opening of a print pattern corresponding to the seal portion, and a small hole of 1 mm or less is used. The dispenser drawing method which draws a sealing material in a predetermined shape by moving a glass substrate or a nozzle while discharging the sealing material filled in the inside of the syringe provided with the nozzle which has from the nozzle is mentioned.

  In recent years, liquid crystal display panels have been increased in size, and the size of glass substrates has increased. Accordingly, in the former screen printing method, the mesh plate is enlarged, so that the printing accuracy is reduced due to the expansion and contraction of the plate, and the amount of the sealing material that remains on the plate after printing, that is, the amount of discarded material is increased. There is a possibility that the amount of the sealing material used will be unnecessarily increased by several times to several tens of times the amount actually printed on the substrate. Therefore, in recent years, the latter dispenser drawing method is suitably used as a method for forming a seal portion in the manufacture of a liquid crystal display panel.

  By the way, in the above-described dispenser drawing method, in order to form the above-described closed loop, a seam (hereinafter referred to as “start and end portion”) between a start point that is a discharge start portion of the seal material and an end point that is a discharge end portion of the seal material. ) Always exists. Here, when a gap is opened between the start point and the end point in the beginning and end portions of the seal material, the liquid crystal material leaks from the gap, so when drawing the seal material, the start point and the end point are surely It is necessary to connect. For example, when the line width other than the start / end portion of the seal material is about 0.8 mm to 1.2 mm, the line width of the start / end portion of the seal material is about 1.3 mm to 2.0 mm.

  In addition, since the seal material used for the liquid crystal dropping and bonding method is generally a type that is cured by UV irradiation and heating, in the portion where the UV light irradiation is insufficient due to the shadow of the light shielding member, Part of it may elute into the liquid crystal material and cause deterioration in display quality. Furthermore, some of the sealing materials that are commercially available can undergo UV curing even if they become shadows to some extent, but the extent is about 100 μm to 150 μm from the edge of the shadow. In the beginning and end portions of the sealing material having a considerable difference in line width, the sealing material will not be sufficiently cured.

  Examples of the light shielding member include a black matrix provided in a frame shape inside the closed loop seal portion. In addition, large liquid crystal display panels used in personal computer monitors, TVs, etc. can be easily designed to irradiate UV light to the entire seal part, but are used in mobile phones etc. Such a liquid crystal display panel is difficult to design. For this reason, in a small and medium-sized liquid crystal display panel, the beginning and end portions of the sealing material may be hidden by 200 μm or more in the shadow of the black matrix, so that the sealing material may be insufficiently cured.

Patent Document 3 discloses a method in which the line width at the beginning and end of the sealing material does not increase. According to this method, even if it is effective when drawing with a single coating head, when a small and medium-sized liquid crystal display panel is multi-faced on a glass substrate, for example, 2 inches on a 730 mm × 920 mm glass substrate. The liquid crystal display panel is not suitable for the case where a plurality of liquid crystal display panels of 16 rows × 18 columns are drawn and simultaneously drawn in a total of 288 cells by the dispenser drawing method. That is, in order to efficiently produce the above-described medium and small-sized liquid crystal display panel by multi-planar drawing, it is necessary to draw using a plurality of coating heads simultaneously. In such a case, even if the moving speed and the discharge pressure of the coating head are set to be the same, it is extremely difficult to make the discharge state of each coating head completely the same, so a sealing material for some liquid crystal display panels is unavoidable. At the beginning and end of the line width becomes thick.
JP-A 63-179323 JP-A-11-109388 JP 2002-98799 A

  The present invention has been made in view of such points, and the object of the present invention is to reliably cure the start and end portions of the seal material when drawing the seal material in the liquid crystal dropping bonding method by the dispenser drawing method. There is.

  In order to achieve the above object, according to the present invention, at least one of a notch portion of the light shielding portion and an opening portion of the signal supply portion is provided at a position corresponding to the wide portion of the seal portion.

  Specifically, a liquid crystal display panel according to the present invention includes a first substrate and a second substrate that are arranged to face each other, and a liquid crystal layer provided between the first substrate and the second substrate, for display. A liquid crystal display panel in which a display area that contributes and a non-display area that is provided around the display area and does not contribute to display are defined, wherein the non-display area includes a space between the first substrate and the second substrate. Is provided with a frame-shaped seal portion made of a photocurable material, which encloses the liquid crystal layer and has a narrow linear portion and a wider portion wider than the linear portion. One substrate has a light-shielding property and a signal supply portion for supplying a display signal to the display region is formed in a pattern, and the second substrate is formed along an inner peripheral end of the seal portion and is formed on the wide portion. A frame-shaped shield with a notch at the corresponding position. Wherein the parts are provided.

  According to said structure, although the light-shielding light-shielding part is provided in the 2nd board | substrate side of the seal | sticker part provided in the non-display area | region, conventionally the width | variety of the seal part in which light irradiation was inadequate Since the cutout portion of the light shielding portion is located in the portion, it is possible to sufficiently irradiate light from the second substrate side to the wide portion of the seal portion through the cutout portion. Here, the wide portion of the seal portion is a start point and an end point when the seal material is drawn with a single stroke in the liquid crystal dropping bonding method, that is, a start and end portion. Therefore, in the liquid crystal dropping bonding method by the dispenser drawing method, the start and end portions of the sealing material when drawing the sealing material are surely cured.

  In addition, the liquid crystal display panel according to the present invention includes a first substrate and a second substrate disposed to face each other, and a liquid crystal layer provided between the first substrate and the second substrate, and contributes to display. And a non-display area that is provided around the display area and does not contribute to display, wherein the non-display area is provided between the first substrate and the second substrate. Encloses the liquid crystal layer, has a narrow linear portion and a wider portion wider than the linear portion, and is provided with a frame-shaped seal portion made of a photocurable material, The substrate has a light-shielding property, has an opening at a position corresponding to the wide portion, and is patterned with a signal supply unit for supplying a display signal to the display area, and the seal portion on the second substrate Frame-shaped light shielding part formed along the inner peripheral edge And it is provided.

  According to the above configuration, although the light-shielding signal supply unit is provided on the first substrate side of the seal unit provided in the non-display area, the width of the seal unit that has conventionally been insufficient in light irradiation is wide. Since the opening portion of the signal supply portion is located in the portion, it is possible to sufficiently irradiate the wide portion of the seal portion from the first substrate side through the opening portion. Here, the wide portion of the seal portion is a start point and an end point when the seal material is drawn with a single stroke in the liquid crystal dropping bonding method, that is, a start and end portion. Therefore, in the liquid crystal dropping bonding method by the dispenser drawing method, the start and end portions of the sealing material when drawing the sealing material are surely cured.

  In addition, the liquid crystal display panel according to the present invention includes a first substrate and a second substrate disposed to face each other, and a liquid crystal layer provided between the first substrate and the second substrate, and contributes to display. And a non-display area that is provided around the display area and does not contribute to display, wherein the non-display area is provided between the first substrate and the second substrate. Encloses the liquid crystal layer, has a narrow linear portion and a wider portion wider than the linear portion, and is provided with a frame-shaped seal portion made of a photocurable material, The substrate has a light-shielding property, has an opening at a position corresponding to the wide portion, and is patterned with a signal supply unit for supplying a display signal to the display area, and the seal portion on the second substrate Formed along the inner peripheral edge of the Wherein the light-shielding portion of a frame shape having a cutout portion in position is provided.

  According to the above configuration, although the light-shielding signal supply unit is provided on the first substrate side of the seal unit provided in the non-display area, the width of the seal unit that has conventionally been insufficient in light irradiation is wide. Since the opening portion of the signal supply portion is located in the portion, it is possible to sufficiently irradiate light from the first substrate side to the wide portion of the seal portion through the opening portion. On the other hand, although a light-shielding light-shielding part is provided on the second substrate side of the seal part, a notch part of the light-shielding part is located in the wide part of the seal part. It is possible to sufficiently irradiate the seal portion with the light through the notched portion. Here, the wide portion of the seal portion is a start point and an end point when the seal material is drawn with a single stroke in the liquid crystal dropping bonding method, that is, a start and end portion. Therefore, in the liquid crystal dropping bonding method by the dispenser drawing method, the start and end portions of the sealing material when drawing the sealing material are surely cured.

  The light shielding part may be a black matrix.

  The signal supply unit may be a display wiring that transmits the display signal.

  The signal supply unit may be a drive circuit that outputs the display signal.

  According to said structure, the effect of this invention is show | played concretely. In particular, in a liquid crystal display panel in which a drive circuit is patterned on a substrate using low-temperature polysilicon or CG silicon (continuous grain boundary crystal silicon), the layout of the drive circuit is used to ensure the beginning and end of the sealing material. It can be cured.

  The method for manufacturing a liquid crystal display panel according to the present invention includes a first substrate and a second substrate disposed to face each other, and a liquid crystal layer provided between the first substrate and the second substrate, A method of manufacturing a liquid crystal display panel in which a display area contributing to display and a non-display area that is provided around the display area and does not contribute to display are defined, and a display signal is displayed in the area to be the non-display area. Forming a first substrate by forming a signal supply unit for supplying the first substrate, and a frame-shaped light-shielding portion having a cutout portion opened to the outside in the region to be the non-display region Forming a second substrate by forming the second substrate; and photocuring along at least one of the first substrate and the second substrate along the outer peripheral edge of the light shielding portion with the notched portion as a start point and an end point Seal material composed of adhesive material A seal portion forming step of drawing with one stroke and forming a frame-shaped seal portion, a liquid crystal arrangement step of dropping and arranging a liquid crystal material on one surface of the first substrate and the second substrate, and the seal A bonding step of bonding the first substrate and the second substrate so that the portion and the liquid crystal material are sandwiched, and a light irradiation step of irradiating the seal portion with light from the second substrate side. And

  According to the above method, in the seal portion forming step, the seal material is drawn with a single stroke to form the seal portion. Therefore, the starting point and the end point when drawing the seal material are wider than the portion in the middle of drawing. Therefore, the part in the middle of drawing becomes a narrow linear part of the seal part, and the start point and end point of drawing, that is, the start and end parts become the wide part of the seal part.

  And since the notch part of the light-shielding part formed in the 2nd board | substrate preparation process is located in the wide part of the seal | sticker part where light irradiation was inadequate conventionally, in the light irradiation process, the 2nd board | substrate side Therefore, it is possible to sufficiently irradiate the wide portion of the seal portion through the notched portion. Therefore, in the liquid crystal dropping bonding method by the dispenser drawing method, the start and end portions of the sealing material when drawing the sealing material are surely cured.

  The method for manufacturing a liquid crystal display panel according to the present invention includes a first substrate and a second substrate disposed to face each other, and a liquid crystal layer provided between the first substrate and the second substrate, A method of manufacturing a liquid crystal display panel in which a display area contributing to display and a non-display area that is provided around the display area and does not contribute to display are defined, wherein an opening portion is formed in the area that becomes the non-display area And forming a signal supply portion for supplying a display signal to produce the first substrate, and forming a frame-shaped light-shielding portion in the region to be the non-display region A second substrate manufacturing step for manufacturing the second substrate, and at least one of the first substrate and the second substrate is configured with a photocurable material along the outer peripheral edge of the light shielding portion with the opening portion as a start point and an end point Draw the sealed material with a single stroke, A sealing portion forming step for forming a sealing portion having a shape, a liquid crystal arrangement step for dropping and arranging a liquid crystal material on one surface of the first substrate and the second substrate, and the sealing portion and the liquid crystal material are sandwiched As described above, the method includes a bonding step of bonding the first substrate and the second substrate, and a light irradiation step of irradiating the seal portion with light from the first substrate side.

  According to the above method, in the seal portion forming step, the seal material is drawn with a single stroke to form the seal portion. Therefore, the starting point and the end point when drawing the seal material are wider than the portion in the middle of drawing. Therefore, the part in the middle of drawing becomes a narrow linear part of the seal part, and the start point and end point of drawing, that is, the start and end parts become the wide part of the seal part.

  And since the opening part of the signal supply part formed in the 1st board | substrate preparation process is located in the wide part of the seal | sticker part where light irradiation was inadequate conventionally, in the light irradiation process, the 1st board | substrate side Therefore, it is possible to sufficiently irradiate the wide portion of the seal portion through the notched portion. Therefore, in the liquid crystal dropping bonding method by the dispenser drawing method, the start and end portions of the sealing material when drawing the sealing material are surely cured.

  The method for manufacturing a liquid crystal display panel according to the present invention includes a first substrate and a second substrate disposed to face each other, and a liquid crystal layer provided between the first substrate and the second substrate, A method of manufacturing a liquid crystal display panel in which a display area contributing to display and a non-display area that is provided around the display area and does not contribute to display are defined, wherein an opening portion is formed in the area that becomes the non-display area A first substrate manufacturing step of forming the first substrate by forming a signal supply portion for supplying a display signal, and an outer region at a position corresponding to the opening portion in the region to be the non-display region A second substrate manufacturing step of forming the second substrate by forming a frame-shaped light-shielding portion having a notched portion opened in the substrate, and the opening portion and the notch are formed on at least one of the first substrate and the second substrate. The above shading as the start and end points A sealing part forming step of drawing a sealing material composed of a photocurable material along the outer peripheral edge of the sheet with a single stroke to form a frame-shaped sealing part, and one surface of the first substrate and the second substrate A liquid crystal arrangement step of dropping and arranging a liquid crystal material, a bonding step of bonding the first substrate and the second substrate so that the seal portion and the liquid crystal material are sandwiched, and the sealing portion A light irradiation step of irradiating light from both the first substrate side and the second substrate side.

  According to the above method, in the seal portion forming step, the seal material is drawn with a single stroke to form the seal portion. Therefore, the starting point and the end point when drawing the seal material are wider than the portion in the middle of drawing. Therefore, the part in the middle of drawing becomes a narrow linear part of the seal part, and the start point and end point of drawing, that is, the start and end parts become the wide part of the seal part.

  Conventionally, in the wide portion of the seal portion where light irradiation has been insufficient, the opening portion of the signal supply portion formed in the first substrate manufacturing process and the light shielding portion formed in the second substrate manufacturing step Since both of the cutout portions are located, in the light irradiation process, light irradiation is sufficiently performed on both the first substrate side and the second substrate side to the wide portion of the seal portion through the opening portion and the cutout portion. Is possible. Therefore, in the liquid crystal dropping bonding method by the dispenser drawing method, the start and end portions of the sealing material when drawing the sealing material are surely cured.

  The light shielding part may be a black matrix.

  The signal supply unit may be a display wiring that transmits the display signal.

  The signal supply unit may be a drive circuit that outputs the display signal.

  According to the said method, the effect of this invention is specifically show | played. In particular, in a liquid crystal display panel in which a drive circuit is patterned on a substrate using low-temperature polysilicon or CG silicon (continuous grain boundary crystal silicon), the layout of the drive circuit is used to ensure the beginning and end of the sealing material. It can be cured.

  According to the present invention, since at least one of the notch portion of the light shielding portion and the opening portion of the signal supply portion is provided at a position corresponding to the wide portion of the seal portion, the light is applied to the wide portion of the seal portion. Irradiation can be sufficiently performed, and in the liquid crystal dropping and bonding method, the start and end portions of the sealing material when drawing the sealing material can be reliably cured.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the following embodiment.

Embodiment 1 of the Invention
1 to 3 show Embodiment 1 of a liquid crystal display panel according to the present invention. In the liquid crystal display panel of the present embodiment, display wiring is exemplified as the signal supply unit. Here, FIG. 1 is a plan view of the liquid crystal display panel 20a of the present embodiment, FIG. 2 is a cross-sectional view of the liquid crystal display panel 20a along the line II-II in FIG. 1, and FIG. It is the principal part top view which expanded the area | region A in FIG. FIG. 1 is a plan view of the liquid crystal display panel 20a when viewed from the counter substrate 2 side described later.

  As shown in FIG. 2, the liquid crystal display panel 20 a includes an active matrix substrate 1 (first substrate) and a counter substrate 2 (second substrate) arranged opposite to each other, and an active matrix substrate 1 and a counter substrate 2. And a liquid crystal layer 6 provided therebetween. In the liquid crystal display panel 20a, as shown in FIG. 3, a display area 10a that contributes to display and a non-display area 10b that does not contribute to display around the display area 10a are defined. A non-display area 10 b between the active matrix substrate 1 and the counter substrate 2 is provided with a frame-shaped seal portion 3 that encloses the liquid crystal layer 6.

  As shown in FIG. 1, the seal portion 3 has a narrower linear portion 3b extending to the right side, the lower side, the left side, and the upper side of the liquid crystal display panel 20a and a linear portion 3b on the upper side that is wider than the line width. And a wide portion 3a.

  The active matrix substrate 1 includes a glass substrate, a plurality of gate lines (display wirings) provided on the glass substrate so as to extend in parallel to each other, and a plurality of source lines provided to be orthogonal to the gate lines. (Display wiring), TFTs (thin film transistors) provided as switching elements at the intersections of the gate lines and the source lines, and the regions surrounded by the pair of adjacent gate lines and the pair of source lines. A pixel electrode and an alignment film provided to cover the pixel electrode are provided. Each pixel electrode constitutes a pixel which is the minimum unit of an image and is arranged in a matrix to constitute a display area 10a. Further, the gate lines and the source lines which are display wirings have light shielding properties and are disposed in the display area 10a and extend to the non-display area 10b. The extended portions of the gate lines and source lines serve as terminal portions 7 in a region where the opposite substrate 2 on the lower side of the active matrix substrate 1 is not disposed as shown in FIG.

  The counter substrate 2 includes a glass substrate 12, a color filter 11 provided on the glass substrate 12, a common electrode provided so as to cover the color filter 11, and an alignment film provided so as to cover the common electrode. I have.

  The color filter 11 includes an RGB colored layer 5 colored in red (R), green (G), and blue (B) corresponding to each pixel in the display area 10a. A black matrix 4 (light-shielding portion) provided between the pixels and in the non-display area 10b is provided. In FIG. 1 to FIG. 3, the black matrix between the pixels arranged in the display area 10a is omitted.

  As shown in FIG. 1, the black matrix 4 has a cutout portion 4 a at a position corresponding to the wide portion 3 a along the inner peripheral end of the seal portion 3 so as not to overlap the seal portion 3. Here, in the 2-inch panel, for example, the line width of the linear portion 3b of the seal portion 3 is about 1.0 mm and the wide portion 3a is about 1.6 mm, that is, the wide portion 3a is a linear portion. When protruding about 0.3 mm from 3 b, the cutout portion 4 a of the black matrix 4 is formed in a trapezoidal shape with a height of about 0.4 mm.

  The liquid crystal layer 6 includes a nematic liquid crystal material (liquid crystal molecules) having electro-optical characteristics.

  In the liquid crystal display panel 20a having such a configuration, in each pixel, the gate signal (display signal) from the driver IC is supplied to the TFT through the gate line, so that the TFT is turned on. At the same time, the driver IC A source signal (display signal) from is supplied to the pixel electrode via the source line and the TFT, whereby a predetermined charge is written into the pixel electrode. At this time, a potential difference is generated between the pixel electrode on the active matrix substrate 1 and the common electrode on the counter substrate 2, and a predetermined voltage is applied to the liquid crystal capacitor formed of the liquid crystal layer 6. In the liquid crystal display panel 20a, an image is displayed by adjusting the transmittance of light incident from the backlight using the fact that the alignment state of the liquid crystal molecules changes according to the magnitude of the applied voltage. .

  Next, an example is given and demonstrated about the manufacturing method of the liquid crystal display panel 20a of the said structure. The liquid crystal display device 20a includes an active matrix substrate manufacturing process (first substrate manufacturing process), a counter substrate manufacturing process (second substrate manufacturing process), a seal portion forming process, a liquid crystal arranging process, a bonding process, and light irradiation described below. Manufactured by sequentially performing the steps.

  First, in the active matrix substrate manufacturing process, various wirings (display wirings), TFTs, pixel electrodes, alignment films, and the like having the above-described configuration are formed on a glass substrate.

  In the counter substrate manufacturing step performed simultaneously with the active matrix substrate manufacturing step, the color filter layer 11 (colored layer 5 and black matrix 4) having the above-described configuration, a common electrode, an alignment film, and the like are formed on the glass substrate 12.

  In the seal part forming step to be performed next, the seal part 3 is formed by drawing a seal material in a frame shape with a single stroke on one of the active matrix substrate 1 and the counter substrate 2 (for example, the active matrix substrate 1) manufactured as described above. To do. Specifically, the sealing material is drawn by moving the substrate or the nozzle while filling the inside of a syringe equipped with a nozzle having a small hole of 1 mm or less and discharging the filled sealing material from the nozzle. To do. When drawing the sealing material, the notched portion 4a of the black matrix 4 is used as the drawing start point and end point. As a result, the wide portion 3 a of the seal portion 3 is positioned in the cutout portion 4 a of the black matrix 4. Here, the sealing material is composed of a UV curable resin (photo-curable material), and for example, “PHOTO REC” manufactured by Sekisui Chemical Co., Ltd. is preferably used.

  In the next liquid crystal arrangement step, for example, the liquid crystal material is dropped and arranged in a number of dots on the surface of the other substrate (counter substrate 2) where the seal portion is not formed.

  In the next bonding step, the active matrix substrate 1 and the counter substrate 2 are bonded together.

  In the next light irradiation step, UV light is irradiated from the counter substrate 2 side to cure the seal portion 3. At this time, since the cutout portion 4a of the black matrix 4 is disposed in the wide portion 3a of the seal portion 3, the UV portion is also applied to the wide portion 3a of the seal portion 3 by irradiating UV light from the counter substrate 2 side. Light can be sufficiently irradiated.

  The liquid crystal panel 20a is manufactured as described above.

  As described above, according to the liquid crystal display panel 20a of the present embodiment, the light shielding display wiring is provided on the active matrix substrate 1 side of the seal portion 3 provided in the non-display area 10b. Although it is difficult to irradiate the seal portion 3 with light from the active matrix substrate 1 side, the black matrix 4 is provided on the counter substrate 2 side of the seal portion 3 so as not to overlap the seal portion 3. Therefore, it is possible to irradiate the seal portion 3 with UV light from the counter substrate 2 side. In particular, since the cutout portion 4a of the black matrix 4 is located in the wide portion 3a of the seal portion 3 that has been conventionally insufficiently irradiated with UV light, the wide width of the seal portion 3 is interposed via the cutout portion 4a. The portion 3a can be sufficiently irradiated with UV light. Therefore, in the liquid crystal dropping bonding method by the dispenser drawing method, the start and end portions of the seal material when drawing the seal material, that is, the wide portion 3a of the seal portion 3 can be reliably cured.

  On the other hand, as shown in FIGS. 11 to 13, in the liquid crystal display panel 120 a in which notched portions are not formed in the black matrix 104, the UV light is sufficiently irradiated to the wide portion 103 a of the seal portion 103. Since the sealing portion 103 cannot be cured, the sealing material constituting the sealing portion 103 may melt into the liquid crystal layer 106. Here, FIG. 11 is a plan view of a liquid crystal display panel 120a as a comparative example, FIG. 12 is a cross-sectional view of the liquid crystal display panel 120a along the line XII-XII in FIG. 11, and FIG. It is the principal part top view which expanded the area | region E in FIG.

<< Embodiment 2 of the Invention >>
4 and 5 show Embodiment 2 of the liquid crystal display panel according to the present invention. Here, FIG. 4 is a plan view of the liquid crystal display panel 20b of the present embodiment, and FIG. 5 is an enlarged plan view of a main part of the region B in FIG. In the following embodiments, the same parts as those in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the liquid crystal display panel 20b, as shown in FIGS. 4 and 5, the black matrix 4 is provided with a character forming portion 4b instead of the notched portion 4a in the first embodiment. Other configurations are the same as those of the liquid crystal display panel 20a of the first embodiment.

  For example, an alphabet of “SHOO” is formed in a white pattern on the character forming portion 4 b, and UV light is transmitted through the white portion to irradiate the wide portion 3 a of the seal portion 3 with UV light. be able to. By displaying the manufacturer name, product name, nickname, design, etc. of the panel on the character forming portion 4b, it is possible to add design features to the panel.

  Moreover, the manufacturing method of the liquid crystal display panel 20b only needs to change the pattern shape of the black matrix 4 in the counter substrate manufacturing process described in the first embodiment. Other functions and effects are the same as those of the liquid crystal display panel 20a of the first embodiment.

<< Embodiment 3 of the Invention >>
6 and 7 show Embodiment 3 of the liquid crystal display panel according to the present invention. Here, FIG. 6 is a plan view of the liquid crystal display panel 20c of the present embodiment, and FIG. 7 is a plan view of an essential part in which a region C in FIG. 6 is enlarged. FIG. 6 is a plan view of the liquid crystal display panel 20c as viewed from the active matrix substrate 1 side.

  In the liquid crystal display panel 20c, as shown in FIGS. 6 and 7, in the active matrix substrate 1, the terminal portion 7 on the lower side is arranged on the left side so that it does not overlap the wide portion 3a of the seal portion 3. An opening 8a of the display wiring 7a is formed. Further, in the counter substrate 2, the black matrix 4 does not have a notch portion as in the first embodiment, and the linear portion 3 b of the seal portion 3 extends along the inner peripheral end of the linear portion 3 b of the seal portion 3. It is provided in a frame shape so as not to overlap with the frame. That is, in this embodiment, the black matrix 4 is superimposed on the wide portion 3a of the seal portion.

  Further, in the manufacturing method of the liquid crystal display panel 20c, the pattern shape of the wiring is changed in the active matrix substrate manufacturing process described in Embodiment 1, and the pattern shape of the black matrix 4 is changed in the counter substrate manufacturing process. In the irradiation step, UV light may be irradiated not only from the counter substrate 2 side but also from the active matrix substrate 1 side.

  According to the liquid crystal display panel 20c, although the light-shielding display wiring 7a is provided on the active matrix substrate 1 side of the seal portion 3 provided in the non-display area 10b, the display wiring 7a has a seal. Since the opening portion 8a is provided at a position corresponding to the wide portion 3a of the portion 3, the wide portion 3a of the seal portion 3 can be irradiated with UV light from the active matrix substrate 1 side. On the other hand, since the black matrix 4 is provided on the counter substrate 2 side of the seal portion 3 so as not to overlap the linear portion 3b of the seal portion 3, the black matrix 4 is provided from the counter substrate 2 side to the linear portion 3 b of the seal portion 3. On the other hand, UV light can be irradiated. For this reason, the wide portion 3a of the seal portion 3 is irradiated with UV light from the active matrix substrate 1 side, that is, the opening portion 8a of the display wiring 7a. Therefore, in the liquid crystal dropping bonding method by the dispenser drawing method, the start and end portions of the sealing material when drawing the sealing material can be reliably cured.

  On the other hand, as shown in FIGS. 14 and 15, in the liquid crystal display panel 120 b provided with the display wiring 107 a that does not have an opening corresponding to the wide portion 103 a of the seal portion 103, Since the UV light cannot be sufficiently irradiated to the wide portion 103a, the sealing portion 103 is not sufficiently cured, and the sealing material constituting the sealing portion 103 may be dissolved into the liquid crystal layer. Here, FIG. 14 is a plan view of a liquid crystal display panel 120b which is a comparative example, and FIG. 15 is a plan view of an essential part in which a region F in FIG. 14 is enlarged.

<< Embodiment 4 of the Invention >>
8 and 9 show Embodiment 4 of the liquid crystal display panel according to the present invention. In the liquid crystal display panel of this embodiment, a drive circuit is illustrated as the signal supply unit. Here, FIG. 8 is a plan view of the liquid crystal display panel 20d of the present embodiment, and FIG. 9 is an enlarged plan view of a main part of a region D in FIG. FIG. 8 is a plan view of the liquid crystal display panel 20d when viewed from the active matrix substrate 1 side, similarly to FIG. 6 described in the third embodiment.

  In the liquid crystal display panel 20d, in the active matrix substrate 1, low temperature polysilicon or CG silicon (continuous grain boundary crystal silicon) is used for the semiconductor film constituting the TFT, and the drive circuit 9 is formed in the non-display area. . The drive circuit 9 is disposed so as not to overlap the wide portion 3 a of the seal portion 3, and an opening portion 8 b is formed between the drive circuits 9. Further, in the counter substrate 2, the black matrix 4 does not have a notch portion as in the first embodiment, and the linear portion 3 b of the seal portion 3 extends along the inner peripheral end of the linear portion 3 b of the seal portion 3. It is provided in a frame shape so as not to overlap with the frame. That is, in the present embodiment, as in the third embodiment, the black matrix 4 is superimposed on the wide portion 3a of the seal portion.

  The drive circuit 9 is a driver IC that is connected to the terminal portion 7 on the input side and the display wiring 7a on the output side, and supplies a display signal to each pixel in the display area.

  According to the liquid crystal display panel 20d, similarly to the liquid crystal display panel 20c of the third embodiment, UV light is applied to the wide portion 3a of the seal portion 3 from the active matrix substrate 1 side, that is, the opening portion 8b of the display wiring 7a. Is irradiated. Therefore, in the liquid crystal dropping bonding method by the dispenser drawing method, the start and end portions of the sealing material when drawing the sealing material can be reliably cured.

<< Other Embodiments >>
In the first and second embodiments, the display wiring 7a (driving circuit) of the active matrix substrate 1 is used in the third and fourth embodiments via the cutout portion 4a (character forming portion 4b) of the black matrix 4 of the counter substrate 2. 9) Illustrated a liquid crystal display panel that can reliably cure the wide portion 3a of the seal portion 3 by irradiating the wide portion 3a of the seal portion 3 with UV light through the opening portion 8a (8b) of 9). However, according to the present invention, the cutout portion 4a (character forming portion 4b) is formed in the black matrix 4 of the counter substrate 2, and the opening portion 8a (8b) is formed in the display wiring 7a (drive circuit 9) of the active matrix substrate 1. May be formed. According to this, in the light irradiation process, the active matrix substrate 1 side, that is, the opening portion 8a of the display wiring 7a (opening portion 8b of the drive circuit 9) and the counter substrate with respect to the wide portion 3a of the seal portion 3 UV light can be irradiated from both sides, that is, both of the cutout portions 4a of the black matrix 4, and the photocuring of the seal portion 3 can be promoted.

  In each of the above embodiments, the configuration in which the linear portion 3b of the seal portion 3 is not superimposed on the black matrix 4 is exemplified. However, in the present invention, the seal portion 3 as in the liquid crystal display panel 20e shown in FIG. May be superimposed on the black matrix 4 up to about half of its width. In this case, although it is necessary to irradiate the seal portion 3 also with UV light from the active matrix substrate 1 side to sufficiently cure the seal portion 3, the width of the non-display area 10b can be reduced, and the liquid crystal The outer size of the display panel can be reduced.

  As described above, since the sealing material can be reliably cured, the present invention is useful for a liquid crystal display panel manufactured by a liquid crystal dropping bonding method.

3 is a plan view of a liquid crystal display panel 20a according to Embodiment 1. FIG. It is sectional drawing of the liquid crystal display panel 20a along the II-II line | wire in FIG. It is the principal part top view which expanded the area | region A in FIG. 6 is a plan view of a liquid crystal display panel 20b according to Embodiment 2. FIG. It is the principal part top view which expanded the area | region B in FIG. It is a top view of the liquid crystal display panel 20c which concerns on Embodiment 3. FIG. It is the principal part top view which expanded the area | region C in FIG. It is a top view of the liquid crystal display panel 20d which concerns on Embodiment 4. FIG. It is the principal part top view which expanded the area | region D in FIG. It is sectional drawing of the liquid crystal display panel 20e which concerns on other embodiment. It is a top view of the liquid crystal display panel 120a of a comparative example. FIG. 12 is a cross-sectional view of the liquid crystal display panel 120a taken along line XII-XII in FIG. It is the principal part top view which expanded the area | region E in FIG. It is a top view of the liquid crystal display panel 120b of a comparative example. It is the principal part top view which expanded the area | region F in FIG.

Explanation of symbols

1 Active matrix substrate (first substrate)
2 Counter substrate (second substrate)
3 Seal part 3a Wide part 3b Linear part 4 Black matrix (light-shielding part)
4a Notched portion 6 Liquid crystal layer 7a Display wiring (signal supply unit)
8a, 8b Opening 9 Drive circuit (signal supply unit)
10a Display area 10b Non-display area 20a, 20b, 20c, 20d Liquid crystal display panel

Claims (12)

A first substrate and a second substrate disposed to face each other;
A liquid crystal layer provided between the first substrate and the second substrate,
A liquid crystal display panel in which a display area contributing to display and a non-display area provided around the display area and not contributing to display are defined,
In the non-display area, the liquid crystal layer is sealed between the first substrate and the second substrate, and has a narrow linear portion and a wider portion wider than the linear portion, and is photocured. A frame-shaped seal portion made of a conductive material is provided, and the first substrate is light-shielded and a signal supply portion for supplying a display signal to the display region is patterned, and the second substrate is provided with a pattern. A liquid crystal display panel characterized in that a frame-shaped light-shielding portion having a cutout portion is provided at a position corresponding to the wide portion formed along the inner peripheral edge of the seal portion. A first substrate and a second substrate disposed to face each other;
A liquid crystal layer provided between the first substrate and the second substrate,
A liquid crystal display panel in which a display area contributing to display and a non-display area provided around the display area and not contributing to display are defined,
In the non-display area, the liquid crystal layer is sealed between the first substrate and the second substrate, and has a narrow linear portion and a wider portion wider than the linear portion, and is photocured. A frame-shaped seal portion made of a conductive material is provided, the first substrate is light-shielding, has an opening at a position corresponding to the wide portion, and supplies a display signal to the display area The liquid crystal display panel is characterized in that the signal supply portion is formed in a pattern, and the second substrate is provided with a frame-shaped light shielding portion formed along the inner peripheral edge of the seal portion. A first substrate and a second substrate disposed to face each other;
A liquid crystal layer provided between the first substrate and the second substrate,
A liquid crystal display panel in which a display area contributing to display and a non-display area provided around the display area and not contributing to display are defined,
In the non-display area, the liquid crystal layer is sealed between the first substrate and the second substrate, and has a narrow linear portion and a wider portion wider than the linear portion, and is photocured. A frame-shaped seal portion made of a conductive material is provided, the first substrate is light-shielding, has an opening at a position corresponding to the wide portion, and supplies a display signal to the display area The signal supply portion is formed in a pattern, and the second substrate is provided with a frame-shaped light-shielding portion formed along the inner peripheral end of the seal portion and having a cutout portion at a position corresponding to the wide portion. A liquid crystal display panel characterized by that. The liquid crystal display panel according to any one of claims 1 to 3,
The liquid crystal display panel, wherein the light shielding portion is a black matrix. The liquid crystal display panel according to any one of claims 1 to 3,
The liquid crystal display panel, wherein the signal supply unit is a display wiring for transmitting the display signal. The liquid crystal display panel according to any one of claims 1 to 3,
The liquid crystal display panel, wherein the signal supply unit is a drive circuit that outputs the display signal. A first substrate and a second substrate disposed to face each other;
A liquid crystal layer provided between the first substrate and the second substrate,
A method of manufacturing a liquid crystal display panel in which a display area contributing to display and a non-display area provided around the display area and not contributing to display are defined,
Forming a first substrate by forming a signal supply unit for supplying a display signal in a region to be the non-display region;
A second substrate manufacturing step of forming the second substrate by forming a frame-shaped light-shielding portion having a notch portion opened to the outside in a region to be the non-display region;
On at least one of the first substrate and the second substrate, a seal material composed of a photocurable material is drawn with a single stroke along the outer peripheral edge of the light shielding portion with the notched portion as a start point and an end point, and a frame A seal portion forming step for forming a seal portion having a shape;
A liquid crystal arranging step of dropping and arranging a liquid crystal material on one surface of the first substrate and the second substrate;
A bonding step of bonding the first substrate and the second substrate so that the sealing portion and the liquid crystal material are sandwiched;
A method of manufacturing a liquid crystal display panel, comprising: a light irradiation step of irradiating the seal portion with light from the second substrate side. A first substrate and a second substrate disposed to face each other;
A liquid crystal layer provided between the first substrate and the second substrate,
A method of manufacturing a liquid crystal display panel in which a display area contributing to display and a non-display area provided around the display area and not contributing to display are defined,
A first substrate manufacturing step of manufacturing the first substrate by forming a signal supply portion for supplying a display signal in the region to be the non-display region and having an opening;
A second substrate manufacturing step of manufacturing the second substrate by forming a frame-shaped light-shielding portion in a region to be the non-display region;
A seal material composed of a photocurable material is drawn with a single stroke along the outer peripheral edge of the light shielding portion with the opening portion as a start point and an end point on at least one of the first substrate and the second substrate, and a frame shape A seal part forming step for forming a seal part of
A liquid crystal arranging step of dropping and arranging a liquid crystal material on one surface of the first substrate and the second substrate;
A bonding step of bonding the first substrate and the second substrate so that the seal portion and the liquid crystal material are sandwiched;
A method for manufacturing a liquid crystal display panel, comprising: a light irradiation step of irradiating the seal portion with light from the first substrate side. A first substrate and a second substrate disposed opposite to each other;
A liquid crystal layer provided between the first substrate and the second substrate,
A method of manufacturing a liquid crystal display panel in which a display area contributing to display and a non-display area provided around the display area and not contributing to display are defined,
A first substrate manufacturing step of manufacturing the first substrate by forming a signal supply unit for supplying a display signal in the region to be the non-display region and having an opening;
A second substrate manufacturing step of forming the second substrate by forming a frame-shaped light-shielding portion having a cutout portion opened outward at a position corresponding to the opening portion in a region to be the non-display region;
On at least one of the first substrate and the second substrate, a seal material made of a photocurable material is drawn with a single stroke along the outer peripheral edge of the light shielding portion with the opening portion and the cutout portion as a start point and an end point. A seal portion forming step for forming a frame-shaped seal portion;
A liquid crystal arrangement step of dropping and arranging a liquid crystal material on one surface of the first substrate and the second substrate;
A bonding step of bonding the first substrate and the second substrate so that the sealing portion and the liquid crystal material are sandwiched;
A method of manufacturing a liquid crystal display panel, comprising: a light irradiation step of irradiating light from both the first substrate side and the second substrate side to the seal portion. In the manufacturing method of the liquid crystal display panel in any one of Claims 7 thru | or 9,
The method for manufacturing a liquid crystal display panel, wherein the light shielding portion is a black matrix. In the manufacturing method of the liquid crystal display panel in any one of Claims 7 thru | or 9,
The method of manufacturing a liquid crystal display panel, wherein the signal supply unit is a display wiring for transmitting the display signal. In the manufacturing method of the liquid crystal display panel in any one of Claims 7 thru | or 9,
The method of manufacturing a liquid crystal display panel, wherein the signal supply unit is a drive circuit that outputs the display signal.

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