JP5549065B2 - Liquid crystal panel and manufacturing method thereof - Google Patents

Description

  The present invention relates to a liquid crystal panel manufactured simultaneously from a large substrate and a manufacturing method thereof.

Liquid crystal panel assembly, a large substrate to form a plurality LCD panel area of, which are formed simultaneously cutting to multi several liquid crystal panels individually. In this case, in order to manufacture many liquid crystal panels from the large-type substrate, reducing the width of the seal member disposed outside the display area of the liquid crystal panel is required. In addition, it is required that the respective liquid crystal panel regions are arranged closely. (See Patent Document 1)

JP 2007-271749 A

Since the sealing material is applied on the substrate by silk screen printing, a dispenser or the like in order to increase productivity, it is difficult to narrow the application width of the sealing material with high accuracy.
In addition, in order to ensure the injection of liquid crystal, the protrusion protruding from the sealing material injection port is formed beyond the cutting line with the adjacent liquid crystal panel region, and divided into individual liquid crystal panels, thereby the protrusion. The part is aligned with the end face of the substrate. Therefore, when dividing into individual liquid crystal panels along the cutting line, the protrusions that join the opposing substrates remain between the substrates in the adjacent liquid crystal panel regions, so that defects such as chipping occur in the substrates. was there.

  An object of this invention is to provide the liquid crystal panel which reduced the defect which generate | occur | produces in a board | substrate, and its manufacturing method.

In order to solve the above problems, an embodiment of a liquid crystal panel according to the present invention includes a first substrate in which a first insulating film is formed and a plurality of pixel electrodes are formed on the first insulating film. a second substrate having a plurality of pixel electrodes and counter to that pair counter electrodes are formed, a sealing member disposed so as to be interposed between the first substrate and the second substrate, the first and e Bei and a liquid crystal layer sealed in said second substrate and the sealing member and in a region surrounded by the sealing material, a frame-shaped portion surrounding the display area of the liquid crystal panel, the frame has an inlet portion formed on one side of the Jo portion, a protrusion protruding toward the outside of the frame-shaped portion from both sides of the inlet portion, from the first insulating layer of the sealing material is formed by removing a portion corresponding to the projecting portion, further the first grooves are filled with the sealing material And, of said protruding portion, at a portion between said inlet portion sides and the end face of the first substrate and the second substrate, the first groove is formed, characterized in that to.

To solve the above problems, one aspect of the manufacturing method of the liquid crystal panel of the present invention includes a first substrate and a second substrate are bonded to each other with a sealing member, said first substrate and said second substrate liquid crystal in a region surrounded by the said sealing material is a manufacturing method of a liquid crystal panel sealed with the insulating film forming step of forming a first insulating film on the first large-sized substrate, the first from the first insulating film of a large substrate, and the frame-like portion which surrounds the display area in which a plurality of pixels of the liquid crystal panel are arranged, an inlet portion formed on one side of the frame-shaped portion, the inlet a protrusion from both sides of the section projecting toward the outside of the frame-like portion, of said sealing member having a first groove by removing the portions corresponding to the projecting portion is filled with the sealing material a first groove forming step of forming, which is formed on the first large substrate Serial on the first insulating film, a first electrode forming step of forming a first electrode, the second large substrate, a second electrode forming step of forming a second electrode, the first The frame-shaped portion of the sealing material and the surface of the first large substrate on one of the surface on which the first electrode is formed and the surface on which the second electrode of the second large substrate is formed An application step of applying a material for forming the inlet and the protruding portion; a surface of the first large substrate on which the first electrode is formed; and the second large substrate. and electrodes are formed face to face arranged, the first large substrate between said second large-sized substrate and a step of bonding through a pre SL materials, the bonded together the first large substrate and and a step of cutting a second large-sized substrate for each area of the liquid crystal panel, wherein the coating step, Comprising the step of applying to straddle the two regions of the liquid crystal panel in contact next to the serial material, wherein the step of cutting, the first groove, one liquid crystal panel of said adjacent two of said liquid crystal panel wherein one of the protruding portions so as to be formed in a portion between the end face of each side and the first substrate and the second substrate of the inlet portion of the one liquid crystal panel, the first of comprising the step of cutting the large-sized substrate and the second large-sized substrate, and wherein the.

According to the liquid crystal panel of the present invention, defects generated on the substrate of the liquid crystal panel can be reduced.
Moreover, according to the manufacturing method of the liquid crystal panel of this invention, the liquid crystal panel which reduced the defect generate | occur | produced in a board | substrate can be manufactured.

(First embodiment)
FIG. 1 is a plan view of a liquid crystal panel according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II in FIG.
In these drawings, in the liquid crystal panel, a first substrate and a second substrate are arranged to face each other, and liquid crystal is sealed between these substrates. The first substrate comprises a counter substrate 2 provided with a counter electrode 1 formed of one conductive film or a plurality of conductive films. The second substrate comprises a pixel substrate 4 on which a plurality of pixel electrodes 3 each forming a pixel by a region facing the counter electrode 1 are formed. Although not shown, the pixel substrate 4 has a plurality of pixel electrodes 3 arranged in the row and column directions, a plurality of pixels corresponding to the pixel electrodes 3 are arranged in a matrix, and the plurality of pixels are arranged in a matrix. The regions arranged in a shape form a display region.

The pixel substrate 4 facing the substrate 2 and the picture element electrode 3 counter electrode 1 is provided is provided is disposed an inner surface, each of the electrodes are formed to face each other, they are bonded to each other with a sealing member 5 Yes. The sealing material 5 includes a frame-like portion 5a having four sides surrounding the display area in which the plurality of pixels are arranged, an inlet portion 5b formed on one side of the frame-like portion 5a, and the inlet portion 5b. from both sides consist, a protrusion 5c protruding toward outside of the frame-shaped portion 5a of the seals the liquid crystal 6 between the pixel substrate 4 and the counter substrate 2.

At least one of said opposing electrode 1 and the pixel substrate 4, the surface facing the counter electrode 1 of the pixel substrate 4 in this embodiment, the insulating film 7, the pixel electrode 3 over the insulating film 7 , And a thin film transistor 8 (hereinafter referred to as TFT) is connected to each pixel electrode 3. Although the TFT 8 is simplified in FIG. 2, as shown in FIG. 3, the TFT 8 is formed to cover the gate electrode 9 formed on the pixel substrate 4 and the gate electrode 9, and the insulation A transparent gate insulating film 7g constituting the film 7, an i-type semiconductor film 10 formed on the gate insulating film 7g so as to face the gate electrode 9, and one end and the other of the i-type semiconductor film 10 a drain electrode 11 and the source electrode 12 formed over the n-type semiconductor film (not shown) on the end, a protective insulating film 13 covering these membranes consists of.

  In the TFT 8, the gate electrode 9 is connected to a plurality of scanning lines (not shown), the drain electrode 11 is connected to a plurality of signal lines (not shown), and the source electrode 12 is connected to the plurality of pixel electrodes 3, respectively. ing.

The insulating film 7, of the gate insulating film 7g constituting the TFT8 and the protective insulating film 13, which is formed by extending at least the gate insulating film 7g on the peripheral portion of the pixel substrate 4 , at least corresponds to the projecting portion 5c, and corresponds to the width of the sealing material 5 portion of the frame-shaped portion 5a of the seal member 5 and the projecting portion 5c are removed. In this embodiment, the forming a gate insulating film 7g substantially the entire surface of the pixel substrate 4, the gate insulating film 7g, corresponding to a frame-shaped portion 5a of the seal member 5 and the protruding portion 5c, and the sealing material A portion corresponding to the width 5 is removed, and the seal width is defined by allowing the seal material 5 to flow in and defining the width of the seal material 5 by the removed side wall of the gate insulating film 7g and the inner surface of the substrate. A groove 7a is formed.

The pixel substrate 4 is supplied with a signal for operating the TFT 8 to the plurality of scanning lines and the plurality of signal lines, and a signal to the counter electrode 1 to drive each pixel. 14 is mounted. The sealing material injection port 5 b is sealed with a sealing material 15 after the liquid crystal 6 is injected between the counter substrate 2 and the pixel substrate 4.

FIG. 4 schematically shows a liquid crystal panel aggregate in which a plurality of liquid crystal panels are arranged. In FIG. 4, the liquid crystal panel described above has a plurality of liquid crystal panel regions 30 arranged on one large substrate 20 for forming a plurality of liquid crystal panels. The large-sized substrate 20, the liquid crystal panel region a gate electrode 9 (not shown) every 30 scanning lines are formed, a gate insulating film 7g on the entire surface of the large substrate 20 to cover them is formed. The outside of the display region of the gate insulating film 7g functions as an insulating film for forming the seal width defining groove 7a.

Insulating film 7 consisting of the gate insulating film 7g corresponds to the frame-shaped portion 5a of the seal member 5 and the protruding portion 5c, and part was removed seal width defining grooves 7a corresponding to the seal width is formed . Although not shown, a plurality of pixel electrodes 3 are formed for each liquid crystal panel region 30 inside the display region. An uncured seal material is applied to the inner surface of the pixel substrate 4 between the frame-like portion 5a and the protruding portion 5c of the seal material 5, that is, the seal width defining groove 7a. The seal material 5 is formed by flowing into the seal width defining groove 7a and defining the width of the seal material 5 narrowly. Thereafter, the other large substrate on which the counter electrode 1 disposed on the counter substrate 2 is formed for each liquid crystal panel region 30 is bonded together.

  The liquid crystal panel assembly in which two large substrates are bonded together is cut along the cutting lines 40 and 50 for each liquid crystal panel region 30 and the other large substrate is cut along the cutting lines 41 to individually A liquid crystal panel is formed. The tip of the protruding portion 5c of the sealing material 5 is formed across the cutting line 40 of the adjacent liquid crystal panel region 30, and is divided together with the counter substrate 1 and the pixel substrate 4 when the large substrate is cut.

  By this division, the liquid crystal panel is formed with an injection port 5b in which the protruding portion 5c of the sealing material 5 reaches the end surfaces of the counter substrate 1 and the pixel substrate 4, and the tip of the protruding portion 5c of the sealing material 5 remains. In another liquid crystal panel, since the seal width of the protruding portion 5c is narrow, the seal material 5 can be easily broken, and unnecessary portions of the large substrate can be removed.

This embodiment, as shown in Figure 5 showing a cross section of the protruding portion 5c of the inlet portion 5b, the gate insulating film 7 formed on the pixel substrate 4, a frame-shaped portion 5a of the seal member 5 and the protruding portion 5c at least corresponds to the projecting portion 5c, and by removing a portion corresponding to the width of the sealing material 5, the seal width defining for flowed to define the width of the sealing material 5 by the sealing member 5 of the since grooves were formed 7a, it is applied along the seal width defining grooves 7 a of the insulating film 7, the sealing material 5 of uncured, flows into the seal width defining grooves 7a, by the seal width defining grooves 7a, seal width Is no longer spread. Therefore, the sealing material 5 with a narrow seal width can be formed.

Then, as in this embodiment, by the all regions of the seal member 5 corresponding to the frame-shaped portion 5a of the seal member 5 and the protruding portion 5c provided a seal width defining grooves 7a, the width of the entire sealing material 5 Since it can be narrowed, the liquid crystal panel area can be reduced, and the number of liquid crystal panel areas taken from a large substrate can be increased.

Further, by providing the seal width defining groove 7a in the portion corresponding to the protruding portion 5c of the sealing material 5, the width of the protruding portion 5c formed across the adjacent liquid crystal panel regions can be reduced, so that each liquid crystal when cutting the panel, because easily broken projecting portion 5c, it is unnecessary to cause chipping to the counter substrate 2 and the pixel substrate 4.

In the embodiment described above, an example in which the seal width defining groove 7a is formed by removing the insulating film 7 on the pixel substrate 4 of one of the opposing pixel substrate 4 and the counter substrate 1 is shown. However, the present invention is not limited to this, and the seal width defining groove 7a may be formed in both the pixel substrate 4 and the counter substrate 1 facing each other.

That is, as shown in FIGS. 6 and 7, an insulating film 70 is formed on the inner surface of the counter substrate 1, and the frame-like portion 5 a and the protruding portion of the sealing material 5 are formed in the same manner as the seal width defining groove 7 a of the pixel substrate 4. The seal width defining groove 70a is formed by removing a portion corresponding to 5c and corresponding to the seal width.

According to the embodiment shown in FIGS. 6 and 7, the seal width defining grooves 7a provided on both the pixel substrate 4 and the counter substrate 1 by 70a, the seal width is defined from both sides of the opposing substrate, The seal width of the sealing material 5 can be made narrower, and the number of liquid crystal panel regions taken from the large substrate can be increased.
Further, the seal width of the protruding portion 5c of the sealing material 5 can be made narrower, and the occurrence of chipping of the pixel substrate 4 and the like can be further reduced when divided into each liquid crystal panel.

In the above-described embodiments, the gate insulating film 7g is used as the insulating film for forming the seal width defining groove 7a. However, the present invention is not limited thereto, and the protective insulating film 13 of the TFT 8 is used as the insulating film. In this case, the protective insulating film 13 of the TFT 8 may also be formed around the pixel substrate 4, and the seal width defining groove 7 a may be formed in the protective insulating film 13, or the protective insulating film 13 of the TFT 8 may be formed. and then laminating the gate insulating film 7g formed, these multilayer films, may be formed a seal width defining grooves.

1 is a plan view of a liquid crystal panel showing a first embodiment of the present invention. Sectional drawing which follows the II-II line | wire of FIG. 1 in the liquid crystal panel of a 1st Example. The expanded sectional view which expands and shows the cross section of the liquid crystal panel of a 1st Example. The top view which shows the manufacturing process of the liquid crystal panel of a 1st Example. The liquid crystal panel of a 1st Example WHEREIN: The expanded sectional view which follows the VV line | wire of FIG. Sectional drawing which shows the cross section of the liquid crystal panel which concerns on the other Example of this invention. The expanded sectional view which expands and shows the cross section of the liquid crystal panel which concerns on another Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Counter electrode, 2 ... Counter substrate, 3 ... Pixel electrode, 4 ... Pixel substrate, 5 ... Sealing material, 5a ... Frame-shaped part, 5b ... Injection part , 5c ... Projection part, 6 ... Liquid crystal, 7 ... Insulating film , 7g ... gate insulating film, 7a ... seal width defining groove, 8 ... thin film transistor, 9 ... gate electrode, 10 ... i-type semiconductor film, 111 ... drain electrode, 12 ... source electrode, 13 ... protective insulating film, 20 ... large substrate 30 ... Liquid crystal panel region, 40, 41, 50 ... Cutting line.

Claims (5)

A first substrate having a first insulating film formed thereon and a plurality of pixel electrodes formed on the first insulating film;
A second substrate on which the plurality of pixel electrodes and counter to that pair counter electrode is formed,
A sealing material provided to be interposed between the first substrate and the second substrate;
A liquid crystal layer sealed the first and the second substrate surrounded by said sealing member region,
Bei to give a,
Projecting the sealing material, said a frame portion surrounding the display area of the liquid crystal panel, toward the corresponding frame-shaped portion inlet portion formed on one side of, from both sides of the inlet portion to the outside of the frame-shaped portion a and a protrusion has a,
Is formed by removing a portion corresponding to the projecting portion of the sealing member from said first insulating film, further comprising a first groove which is filled with the sealing material,
Wherein one of the protruding portions, the portion between the inlet portion on both sides and the end face of the first substrate and the second substrate, the first groove is formed,
A liquid crystal panel characterized by that. A second insulating film is formed on the second substrate and the counter electrode is formed on the second insulating film;
2. The device according to claim 1, further comprising a second groove formed by removing a portion corresponding to the protruding portion of the sealing material from the second insulating film and filled with the sealing material. LCD panel.   The member made of the same material as the sealing material remains on the first substrate on the side opposite to the side where the protruding portion of the frame-like portion is provided. 2. A liquid crystal panel according to 2. A first substrate and a second substrate are bonded to each other with a sealing member, the liquid crystal panel in which liquid crystal in a region surrounded by the first substrate and the second substrate and the sealing member is sealed A manufacturing method comprising:
An insulating film forming step of forming a first insulating film on the first large substrate;
From the first insulating film of said first large-sized substrate, a frame-shaped portion surrounding the display region in which a plurality of pixels of the liquid crystal panel is arranged, and the inlet portion formed in one side of the frame-like portion, the both sides of the inlet portion of said sealing member having a protrusion protruding toward the outside of the frame-shaped portion, the first to be filled with the sealing material to remove the portion corresponding to the projecting portion A first groove forming step of forming a groove of
A first electrode forming step of forming a first electrode on the first insulating film formed on the first large substrate;
A second electrode forming step of forming a second electrode on the second large substrate;
The frame-shaped portion of the sealing material on one of the surface of the first large substrate on which the first electrode is formed and the surface of the second large substrate on which the second electrode is formed And an application step of applying a material for forming the inlet and the protrusion,
A surface of the first large substrate on which the first electrode is formed and a surface of the second large substrate on which the second electrode is formed are arranged opposite to each other; a step of bonding the second large substrate through a pre SL material,
A step of cutting said laminated together the said first large-sized substrate and the second large-sized substrate for each area of the liquid crystal panel,
With
The coating step includes the step of applying to extend across the area of two of said liquid crystal panel in contact next to the material,
Wherein the step of cutting, said first groove, of said protruding portion of one liquid crystal panel of said adjacent two of said liquid crystal panel, and both sides of the inlet portion of the one liquid crystal panel as formed in the portion between the end face of the first substrate and the second substrate, comprising the step of cutting said first large-sized substrate and the second large-sized substrate,
A method for manufacturing a liquid crystal panel. An insulating film forming step of forming a second insulating film on the second large substrate;
From the second of said second insulating film of a large substrate, the second groove forming step of forming a second groove before Symbol by removing a portion corresponding to the projecting portion is filled with the sealing material of the sealing material When,
The method of manufacturing a liquid crystal panel according to claim 4, further comprising:

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