KR100688727B1 - method for producing liquid crystal display pannel - Google Patents

Abstract

A method for manufacturing a liquid crystal display panel of the present invention includes a first substrate such as a TFT array substrate and a second substrate such as a color filter substrate, wherein the periphery of the first substrate and the second substrate is located outside the display area. The area of the black matrix which surrounds the present area of the liquid crystal layer and is formed from a seal member which fixes both substrates, and is not formed with an alignment film on the counter terminal side perpendicular to the substrate intrusion direction of rubbing on the second substrate. It is formed longer than the distance which this rubbing roller advances between one rotation, and the liquid crystal display panel with a favorable display characteristic can be obtained.

LCD, display pannel

Description

Method for producing liquid crystal display panel

1 is a plan view illustrating Embodiment 1 of a liquid crystal display panel of the present invention;

2 is a plan view illustrating Embodiment 2 of a liquid crystal display panel of the present invention;

3 is a plan view showing an example of a conventional color filter substrate;

4 is a diagram showing a display stain in a conventional color filter substrate.

Explanation of symbols on the main parts of the drawings

1: transparent insulating substrate 2: liquid crystal panel

3: color filter 4: black matrix

5: alignment layer 6: display area

7: Black matrix area 10: Color filter substrate

11: rubbing roller

S: Board penetration direction T: Terminal opposite side

The present invention relates to a method of manufacturing a liquid crystal display panel. More specifically, the present invention relates to a liquid crystal display panel having good display characteristics and a manufacturing method thereof.

A conventional liquid crystal display device uses a spacer in which a thin transparent transistor and an alignment layer are stacked on top of each other, that is, an array substrate and an upper transparent insulating substrate on which color filters and alignment layers are stacked, that is, a color filter substrate. A liquid crystal display panel which is formed by overlapping with a predetermined interval therebetween and bonding with a seal material provided on the periphery, injecting liquid crystal from a liquid crystal inlet formed in a part of the seal material, and subsequently encapsulating the liquid crystal display panel. It consists of a polarizing plate and the backlight arrange | positioned at the board | substrate side of one side, and are attached to the outer side of both board | substrates.

3 to 4 show an example of a liquid crystal display panel in the conventional liquid crystal display device. As shown in FIG. 3, in the liquid crystal display panel, a black matrix 24 for shielding light is formed on the outer peripheral portion of the effective display area 26. FIG. The dimension from the end of the black matrix 24 to the end of the display area 26 is shorter than the dimension from the end of the panel outline 22 to the end of the display area 26 (for example, Japanese Patent Laid-Open No. 8-A). See 234190). 3, 21 is a color filter substrate, 23 is a color filter, 25 is an alignment film, and 31 is a rubbing roller.

Conventionally, as shown in FIGS. 3 and 4, when the alignment film 25 distributed on the color filter substrate 21 is rubbed in the liquid crystal display panel, the display area 26 is formed at the periphery of the alignment film 25. The pattern of the black matrix 27 in which the alignment film 25 is not formed is dragged, and the pattern is perpendicular to the direction S in which the pattern enters the rubbing roller 31 (rotation direction R) of the color filter substrate 21. May appear as unevenness 41. In particular, there was a problem in that a display defect appeared near the rubbing inrush direction.

The present invention is to solve the problems of the conventional liquid crystal display device as described above, and an object thereof is to provide a liquid crystal display panel having good display characteristics and a method of manufacturing the same.

In order to achieve the above object, the present invention includes a first substrate such as a TFT array substrate and a second substrate such as a color filter substrate, and at the periphery of the first substrate and the second substrate outside the display area. The black matrix is formed of a sealing material that surrounds an existing region of the liquid crystal layer and fixes both substrates, and is not formed with an alignment layer on the counter terminal side perpendicular to the substrate intrusion direction of rubbing on the second substrate. The area is formed longer than the distance that travels between the rubbing rollers in one rotation, to provide a liquid crystal display panel having good display characteristics.

The liquid crystal display panel of the present invention includes a transparent insulating substrate, a plurality of scanning lines formed of a metal layer provided on the transparent insulating substrate, a plurality of signal lines arranged in a matrix shape through the scanning lines and the insulating layer, the plurality of scanning lines and the plurality of signal lines. A first substrate comprising a plurality of pixel electrodes and a coated alignment film provided to form a display area corresponding to each intersection of the substrate, a transparent insulating substrate supported on the first substrate by a spacer through a liquid crystal layer, and the transparent insulating layer; A second substrate comprising a black matrix, a colored layer, a transparent electrode, and a coated alignment layer, which are formed on a substrate, and a region in which the liquid crystal layer is present outside the display area at the periphery of the first substrate and the second substrate. A liquid crystal display panel comprising a sealing material for enclosing and fixing both substrates, the liquid crystal display panel comprising: The region of the black matrix in which the alignment film on the opposite side of the terminal perpendicular to the substrate intrusion direction of rubbing is not formed is formed longer than the distance that advances during one rotation of the rubbing roller.

In addition, the method for manufacturing a liquid crystal display panel according to the present invention includes a transparent insulating substrate, a plurality of scan lines formed of a metal layer provided on the transparent insulating substrate, a plurality of signal lines arranged in a matrix form through the scan lines and the insulating layer, and the plurality of scan lines; A first substrate comprising a plurality of pixel electrodes provided to form display regions corresponding to respective intersections of the plurality of signal lines and a coated alignment film, and a transparent insulating substrate supported on the first substrate by a spacer through a liquid crystal layer and superimposed thereon; A second substrate including a black matrix, a coloring layer, a transparent electrode, and a coated alignment layer, which are formed on a transparent insulating substrate, and a periphery of the first substrate and the second substrate; In the manufacturing method of the liquid crystal display panel which consists of a sealing material which surrounds a presence area and fixes both board | substrates, The first is characterized in that the area of the black matrix does not have a substrate and an alignment direction enters the opposite side of the terminal perpendicular to the rubbing on the second substrate is formed, is formed longer than the distance to proceed during the rubbing roller rotates once.

In the above method of manufacturing a liquid crystal display panel, the second substrate is cut at an area of the black matrix on the opposite side of the terminal perpendicular to the rubbing direction of the rubbing, and the end of the liquid crystal display panel on the opposite side of the terminal is cut off. And a rubbing inrush direction of the second substrate from the opposite side of the terminal.

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In the liquid crystal display device according to the present invention, a driving circuit is connected to a liquid crystal display panel formed by sandwiching a liquid crystal layer supported by a spacer between a first substrate, which is a TFT array substrate, and a second substrate, which is a color filter substrate. The panel is overlapped with the backlight (lighting device) arranged on the substrate side in one direction. In general, the driving circuit comprises a tape-shaped film carrier (TCP: tape carrier package) mounted with an LSI for driving a TFT, and a printed circuit board (PCB) for sending power or image signals to the film carrier. It is.

The first substrate includes a transparent insulating substrate, a plurality of scanning lines formed of a metal layer provided on the transparent insulating substrate, a plurality of signal lines arranged in a matrix form through the scanning lines and the insulating layer, the plurality of scanning lines and the plurality of And a plurality of pixel electrodes provided in correspondence with each intersection of the signal lines of and an alignment film coated on the surface. The second substrate is composed of a transparent insulating substrate, a black matrix which is a light shielding layer formed on the transparent insulating substrate, a coloring layer, a transparent electrode, and an alignment film. Between the peripheral part of the said 1st board | substrate and a 2nd board | substrate, the sealing material surrounding the presence area | region of the said liquid crystal layer is arrange | positioned outside the display area, and both are fixed.

In the present invention, the black matrix region having no alignment film on the opposite side of the terminal perpendicular to the substrate intrusion direction of rubbing on the second substrate is made longer than the distance that advances between one rubbing of the rubbing roller.

EMBODIMENT OF THE INVENTION Hereinafter, the liquid crystal display panel of this invention and its manufacturing method are demonstrated according to an accompanying drawing.

Embodiment 1

1 is a plan view illustrating Embodiment 1 of a liquid crystal display panel of the present invention.
In the liquid crystal display panel according to the first embodiment, a liquid crystal layer is sandwiched between a first substrate as a TFT array substrate and a second substrate as a color filter substrate. Hereinafter, the main part of this invention is demonstrated in detail, referring the color filter board | substrate 10 shown in FIG.

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1, 1 is an upper transparent insulating substrate such as a glass substrate, 2 is an outer panel shape (that is, an outer appearance of a liquid crystal panel), 3 is a color filter formed on the upper transparent insulating substrate 1, 4 is an upper transparent insulating substrate ( A black matrix, which is a light shielding layer formed on 1), 5 is an alignment film, 6 is a display area of a liquid crystal display panel, 7 is a black matrix area where an alignment film is not formed, and 11 is a rubbing roller.

The color filter substrate 10 is formed of a color filter 3 formed on the transparent insulating substrate 1, a black matrix 4 made of multilayered chromium, and the like, red, green, and blue. 3 colored layers, transparent electrodes such as indium tin oxide (ITO), and an alignment film (5). For example, the black matrix 4 is patterned by exposing and developing the multilayer chromium by sputtering or the like. The colored layer is formed by a pigment dispersion method, a dyeing method or an electrodeposition method. The transparent electrode is formed of, for example, a transparent electrode material such as ITO by using a mask sputtering method or the like.

The array substrate is composed of a pixel electrode, a transistor, a scan wiring, a signal wiring and an alignment film formed on a transparent insulating substrate such as a glass substrate. The array substrate can be fabricated by laminating and patterning the same processes as film formation, resist coating, exposure, development, etching and resist stripping. Furthermore, the color filter substrate 10 and the alignment film 5 coated on the array substrate are rubbed in a predetermined direction.

The liquid crystal display panel incorporates a sealant made of, for example, a superfiber fiber or the like into a seal member made of a thermosetting epoxy resin, and is applied to the peripheral edge of the color filter substrate 10 or the array substrate by using a screen printing or a dispenser. Subsequently, the upper and lower substrates are supported by an in-plane spacer or the like, and the curing is performed by overlapping at predetermined intervals. Subsequently, after cutting the substrate by empty-cell processing, the liquid crystal is injected into the injection hole and then manufactured by blocking the injection hole.

In the color filter substrate 10 according to the first embodiment, as shown in FIG. 1, the alignment film 5 on the side opposite to the terminal T perpendicular to the substrate intrusion direction S of rubbing on the color filter 3 is shown. The width of the black matrix area | region 7 which does not exist is formed longer than the distance which the color filter board | substrate 10 advances between the rubbing roller 11 rotating one direction in the arrow R direction. That is, in Embodiment 1, rubbing is started from the opposite side side T of terminals.

For example, when rubbing, when the roller rotation speed of the rubbing roller 11 is set to A (rpm), the time required for one rotation becomes 60 / A (sec). When the stage speed at the time of rubbing is B (mm / sec), the distance which the stage, ie, the transparent insulating substrate 10, advances between one rotation of rubbing is B x 60 / A (mm). If the distance from the end of the display area 6 to the end of the alignment film 5 is C (mm) and the distance from the end of the display area 6 to the end of the black matrix 4 is D (mm), the alignment film ( The black matrix region 7 in which 5) is not formed becomes DC (mm). The black matrix on which the alignment film 5 is not formed is made by setting the width DC (mm) of the black matrix 4 on which the alignment film 5 on the opposite side of the terminal T is not formed to B x 60 / A (mm) or more. The width of (4) is made larger than the distance that the transparent insulating substrate 10 advances between one rotation of the rubbing roller 11.

As a result, the black matrix region 7 in which the alignment film 5 is not formed can be rubbed on the entire surface of the rubbing fabric, so that the damage of the rubbing cloth can be uniformed around the circumference. By introducing the pattern of the matrix 7, generation of display stains can be suppressed.

In recent years, miniaturization of the panel liquid soft part is required, and the dimension from the end of the black matrix to the end of the display area may be larger than the dimension from the end of the panel to the end of the display area on the terminal T side. However, since there is no terminal on the opposite side of the terminal, even if the black matrix 4 is enlarged and the line on the black matrix 4 is cut off, no short occurs. Therefore, the dimension from the end of the black matrix 4 to the end of the display area 6 can be made longer than the dimension of the end of the display area 6 in the panel outline on the opposite side of the terminal T. On the terminal side, the part of the black matrix 4 is rubbed and then rubbed outside the display area 6. In the meantime, in order for the rubbing cloth to become familiar, the display stain in the direction perpendicular to the direction in which the color filter substrate 10 enters the rubbing roller 11 does not occur.

Next, although this invention is demonstrated based on an Example, this invention is not limited only to the Example concerned.

<Example>

First, the roller rotation speed A of the rubbing roller is 1000 rpm, and the stage speed B is 1000 mm / sec. The dimension from the end of the display area on the opposite side of the terminal to the panel outline is 9mm. At this time, when one rubbing rotates, the distance that the stage advances becomes 6 mm. In addition, the distance C from the end of the display area to the end of the alignment film is 1 mm. The distance D from the end of the display area to the end of the black matrix is 8 mm. The black matrix region D-C in which the alignment film is not formed is set to 7 mm. Rubbing is then performed on the side opposite the terminal. As a result, since the area of the black matrix in which the alignment film is not formed is longer than the distance that the stage advances when one rubbing rotates, the area of the black matrix in which the alignment film is not formed is rubbed around the rubbing cloth. The rubbing cloth damage was uniform, and no staining occurred.

Embodiment 2

Next, Embodiment 2 of this invention is demonstrated. In order to downsize the liquid crystal display device, narrowing of the liquid is required. Therefore, in Embodiment 2 of this invention, as shown in FIG. 2, the dimension from the end of the display area 6 of the terminal opposite side T to the panel outline 2 in Embodiment 1 from the conditions of Example 1 is shown. Change only 4mm. The cutting line of the panel outline 2 on the opposite side of the terminal T enters the area portion of the black matrix 4. In the case of the terminal opposite side T, even if it cuts in the area | region part of the black matrix 4, since there is no possibility of a short, a narrow liquid lead panel can be achieved.

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As described above, according to the present invention, the display spots can be eliminated in the alignment film process by making the area of the black matrix in which the alignment film is not formed longer than the distance at which the stage advances when rubbing is rotated one time, so that the display characteristics are reduced. A good liquid crystal display panel and a liquid crystal display device can be obtained.

Claims (4)

delete A transparent insulating substrate, a plurality of scanning lines formed of a metal layer provided on the transparent insulating substrate, a plurality of signal lines arranged in a matrix form through the scanning lines and the insulating layer, and corresponding to each intersection of the plurality of scanning lines and the plurality of signal lines. A first substrate comprising a plurality of pixel electrodes provided to form an area and an applied alignment film; The transparent insulating substrate 1 superimposed on the first substrate by a spacer through a liquid crystal layer, the black matrix 4, the colored layer, the transparent electrode, and the coated alignment layer, which are light blocking layers formed on the transparent insulating substrate 1. A second substrate formed from (5); In the manufacturing method of the liquid crystal display panel which consists of a sealing material which surrounds the existence area | region of the said liquid crystal layer and fixes both board | substrates at the outer periphery of the said 1st board | substrate and a 2nd board | substrate, and the said area | region of the said display area 6 While the rubbing roller 11 rotates once, the black matrix region 7 in which the alignment film 5 on the opposite side of the terminal T perpendicular to the substrate intrusion direction S of the rubbing on the second substrate is not formed is formed. Formed longer than the traveling distance; The second substrate is cut at the area of the black matrix on the opposite side of the terminal (T) perpendicular to the rubbing direction (S) of the rubbing, and the end of the liquid crystal display panel on the opposite side of the terminal (T) is the area of the black matrix. ; A rubbing inrush direction of the second substrate is performed from the opposite side of the terminal (T). delete delete

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