CN100498450C

CN100498450C - Liquid crystal display device and method for manufacturing the same

Info

Publication number: CN100498450C
Application number: CNB2006100903102A
Authority: CN
Inventors: 殷钟赞; 刘晙荣; 金兑满; 李鸿硕; 赵埈范
Original assignee: LG Display Co Ltd
Current assignee: LG Display Co Ltd
Priority date: 2005-09-28
Filing date: 2006-06-29
Publication date: 2009-06-10
Anticipated expiration: 2026-06-29
Also published as: TWI341429B; KR100933454B1; CN1940656A; KR20070035922A; TW200712704A

Abstract

An LCD device and a method for manufacturing the same is disclosed, in which it is possible to correct a problem of insufficient or excessive supply of liquid crystal in an LCD device by controlling an amount of liquid crystal, the method comprising preparing a liquid crystal cell comprised of a first substrate, a second substrate, a liquid crystal layer between the first and second substrates, and a first sealant formed in the periphery of the liquid crystal layer between the first and second substrates; measuring an amount of liquid crystal provided to the inside of liquid crystal cell; forming an inlet for liquid crystal in the first sealant; regulating the amount of liquid crystal by supplying or discharging the liquid crystal through the inlet; and sealing the inlet.

Description

Liquid crystal disply device and its preparation method

The application requires the Korean Patent Application No. P2005-128651 that submits on Dec 23rd, 2005 and the right of priority of the P2005-90637 that submits on September 28th, 2005, is incorporated herein full content as a reference.

Technical field

The present invention relates to a kind of liquid crystal display (LCD) device, more specifically, relate to a kind of method by control amount of liquid crystal in the LCD device of liquid crystal distributing method manufacturing.

Background technology

In the multiple ultra-thin panel display apparatus that comprises the display screen with several centimetres of thickness, because liquid crystal display (LCD) device has the advantage as low-power consumption and portability, so it can be widely used for notebook computer, display, aircraft etc.

Hereinafter, the LCD device according to prior art makes an explanation following.

Fig. 1 has illustrated the decomposition diagram according to the LCD device of prior art.

As shown in Figure 1, the LCD device according to prior art comprises: infrabasal plate 10, upper substrate 20 and be formed on upper substrate 10 and infrabasal plate 20 between the liquid crystal layer (not shown).

Infrabasal plate 10 comprises: intersect each other to limit the grid line 12 and the data line 14 in unit pixel zone.Then, thin film transistor (TFT) TFT is formed on the intersection adjacent to grid line 12 and data line 14, and wherein thin film transistor (TFT) TFT plays switch.Equally, pixel capacitors 16 is formed in the pixel area, and wherein pixel capacitors 16 is connected with thin film transistor (TFT) TFT.

Upper substrate 20 comprises: prevent the black matrix layer 22 that the light of other parts except that pixel area leaks, expression is corresponding to the color filter layer 24 of the red, green and blue pattern of the color in the part of pixel area and be formed on public electrode 26 on the color filter layer 24.

The LCD device is by the lower and upper substrate of preparation, and the step manufacturing that forms liquid crystal layer between lower and upper substrate.At this moment, liquid crystal layer can form by distribution method or vacuum method for implanting.

Under the situation of vacuum method for implanting, the sealant with inlet is formed in two base boards one of any, and two substrates is bonded to each other together, then liquid crystal is injected into the space between the two substrates.

Under the situation of distribution method, the sealant that does not have inlet is formed in the infrabasal plate, and liquid crystal is distributed on the infrabasal plate, then two substrates is bonded to each other together.

Along with substrate increase dimensionally, the problem that the vacuum method for implanting has is the injection length that it need be grown, and reduces output thus.For this reason, large-sized LCD device uses distribution method usually.

Then, the distribution method according to the liquid crystal of prior art has following shortcoming.

In the distribution method according to the liquid crystal of prior art, the amount that is difficult to the control liquid crystal is suitable.

Be different from the vacuum method for implanting, consider the size and the height of unit, distribution method is measured the suitable amount of liquid crystal in advance.Yet, because multiple environmental restraint is difficult to the accurately liquid crystal of amount of control.

If the quantity not sufficient of liquid crystal, then the inside of LCD panel is provided with the part of incomplete filling.Simultaneously, if the amount of liquid crystal is too much, then the inside of LCD panel is provided with the part of too much filling.As a result, the image quality in images of demonstration descends.

Therefore, multiple research and development have been carried out so that prevent that providing of liquid crystal is not enough or too much.If not enough or too much liquid crystal is assigned to the LCD panel, then the LCD panel has serious defective.Thereby,, have deficiency or the LCD panel of the liquid crystal that too much provides will be scrapped even very uneconomical.

Summary of the invention

Therefore, the present invention relates to a kind of manufacture method of LCD device, it has been avoided basically because the restriction of prior art and one or more problems that defective causes.

An object of the present invention is to provide a kind of manufacture method of LCD device, wherein can be by liquid crystal deficiency in the amount correction LCD device of control liquid crystal or the problem that too much provides.

Another object of the present invention provides a kind of LCD device, wherein can be by liquid crystal deficiency in the amount correction LCD device of control liquid crystal or the problem that too much provides.

Additional advantages of the present invention, purpose and feature will propose in the following description, and part is apparent according to following test for those skilled in the art, perhaps can understand from enforcement of the present invention.By pointed concrete structure in following description and claim and the appended accompanying drawing, purpose of the present invention and other advantage can realize and obtain.

In order to realize these and other purposes and according to purpose of the present invention, as embodied and broadly described, a kind of manufacture method of LCD device comprises: preparation is by first substrate, second substrate, liquid crystal layer between first and second substrates, and the periphery of the liquid crystal layer between first and second substrates forms the liquid crystal cells that constitutes around first sealant of liquid crystal layer; Measurement is provided to the amount of liquid crystal of the first sealant inside; In first sealant, be formed for the inlet of liquid crystal; Provide or discharge the amount that liquid crystal is regulated liquid crystal by inlet; And sealed entry.

Even liquid crystal is not enough or offer the LCD panel too much, in sealant, be formed with inlet.Thereby, can provide or discharge the amount that liquid crystal is regulated liquid crystal by the inlet of sealant.

At this moment, in first sealant, be formed for the process of inlet of liquid crystal by constituting by the predetermined portions that applies laser ablation first sealant.

Equally, the process by the laser ablation first sealant predetermined portions is made of the predetermined portions of removing first sealant fully.

Equally, the predetermined portions of removing first sealant by part by the process of the laser ablation first sealant predetermined portions constitutes.

Equally, the process of adjusting amount of liquid crystal is made of the outside that a spot of liquid crystal is discharged to liquid crystal cells when liquid crystal is too much provided.In addition, the process of discharging too much liquid crystal constitutes by liquid crystal cells is exerted pressure.

Simultaneously, the process of regulating amount of liquid crystal by when liquid crystal deficiency is provided the time a spot of liquid crystal constituted by the inside that inlet is provided to liquid crystal cells.

Equally, the process of sealed entry is by offering the inlet of first sealant with second sealant, and solidifies this second sealant and constitute.At this moment, first and second sealants are formed by same material.

According to a further aspect in the invention, a kind of LCD device comprises first and second substrates; Be formed on the liquid crystal layer between first and second substrates; First sealant, close-shapedly has an inlet that is used to discharge or provide liquid crystal by applying in first sealant that laser forms with what reduce width, the liquid crystal layer of this first sealant between first and second substrates, wherein first sealant reduces width other parts less than first sealant; Second sealant with sealing first sealant inlet.

At this moment, be used for the inlet of liquid crystal by removing the predetermined portions formation of first sealant fully.Equally, the inlet that is used for liquid crystal forms by the predetermined portions of partly removing first sealant, so that stay some first sealants.

Should be appreciated that general description and following detailed before the present invention are illustrative and indicative, and be intended to provide further explanation of the present invention.

Description of drawings

Appended accompanying drawing is used to provide further understanding of the present invention, and in conjunction with in this application, constitutes the application's a part, these description of drawings embodiments of the invention, and with describe one and be used from and explain principle of the present invention.In the accompanying drawings:

Fig. 1 has illustrated the decomposition diagram according to prior art LCD device;

Fig. 2 A to 2D has illustrated the synoptic diagram of the manufacture method of LCD device according to the preferred embodiment of the invention;

Fig. 3 A and 3B have illustrated the sectional view of edge perpendicular to ' A ' of the I-I ' line of Fig. 2 B;

Fig. 3 C has illustrated the exploded view of first sealant of Fig. 2 B;

Fig. 4 has illustrated the planimetric map of LCD device according to one preferred embodiment of the present invention, and the amount of liquid crystal is controlled in this LCD device;

Fig. 5 A has illustrated the LCD device along the I-I ' of Fig. 4; And

Fig. 5 B and 5C have illustrated along the sectional view of the multiple LCD device of the II-II ' of Fig. 4.

Embodiment

To be described in detail the preferred embodiments of the present invention now, these embodiment illustrate in appended accompanying drawing.In whole accompanying drawing, use identical Reference numeral to represent identical or similar parts as far as possible.

Hereinafter, will be with reference to the manufacture method of appended accompanying drawing description according to LCD device of the present invention.

Fig. 2 A to 2D has illustrated the synoptic diagram of the manufacture method of LCD device according to one preferred embodiment of the present invention.In each of Fig. 2 A to 2D, the left side shows the planimetric map of LCD device, and the right side shows the sectional view along I-I '.

At first, shown in Fig. 2 A, LCD device according to the present invention comprises by first substrate 100, second substrate 200, be formed on the liquid crystal layer 300 between first and

second substrates

100 and 200, and be centered around the liquid crystal cells of first sealant 400 of the liquid crystal layer 300 between first and

second substrates

100 and 200.

The process of preparation liquid crystal cells comprises the steps: to prepare first substrate 100, prepares second substrate 200, and is forming liquid crystal layer 300 between first and

second substrates

100 and 200.

Although do not illustrate, the process for preparing first substrate 100 comprises the steps: to form the black matrix layer that prevents that light from leaking on transparency carrier, forms color filter layer and form public electrode on color filter layer between each pattern of black matrix layer.

If use in-plain switching (IPS) pattern, then public electrode is parallel to pixel capacitors and is formed on second substrate 200.

Although do not illustrate, the process for preparing second substrate 200 comprises the steps: to form and intersects each other to limit the grid line and the data line in unit pixel zone, form as the thin film transistor (TFT) of switch and formation adjacent to the intersection of grid line and data line and to be electrically connected and to be formed on pixel capacitors in the pixel area with thin film transistor (TFT).

At this moment, the grid pad is formed on an end place of grid line, and data pads is formed on an end place of data line, and wherein grid line is connected with driving circuit with data pads by the grid pad with data line.

Because grid pad and data pads are formed in second substrate 200, therefore second substrate 200 is a little greater than first substrate 100.That is, grid pad and data pads are formed on corresponding in the part of the oblique line on the left of Fig. 2 A.

Between first and

second substrates

100 and 200, form in the process of liquid crystal layer 300, use liquid crystal distributing method.

That is, first sealant 400 is formed in first and

second substrates

100 and 200 one of any, and the liquid crystal of scheduled volume be distributed in first and

second substrates

100 and 200 one of any on.Then, first and

second substrates

100 and 200 are bonded to each other and are in the same place.

Assembly in the said process of preparation liquid crystal cells and formation step can change well known to a person skilled in the art several different methods.

By naked eyes observe the step of the amount of liquid crystal 300 in the liquid crystal cells thereafter.This step can be carried out well known to a person skilled in the art several different methods.

If the amount of the liquid crystal that distributes inappropriate (be liquid crystal distributes not enough or too much) is then carried out the step of following adjusting amount of liquid crystal.

If liquid crystal distributes not enough or too much, shown in Fig. 2 B, in the predetermined portions (A) of first sealant 400, form the inlet 410 of liquid crystal.When laser being applied to the predetermined portions (A) of first sealant 400, remove first sealant 400 of predetermined portions (A), form inlet 410 thus.Therefore, can pass through the amount of the inlet 410 adjusting liquid crystal of liquid crystal.

Can constitute by the predetermined portions of removing first sealant fully by the process that applies laser ablation first sealant, perhaps can constitute by the predetermined portions of partly removing first sealant.Remove the predetermined portions of first sealant as fruit part, more then first sealant can be stayed the predetermined space place from first or second substrate 100 or 200.On the other hand, first sealant can be formed between first and

second substrates

100 and 200 to have the close-shaped of width, and this shape is opened by the liquid crystal with pressure.

Shape by first sealant in the predetermined portions of laser ablation can be for multiple, shown in Fig. 3 A to 3C.

Fig. 3 A has illustrated the sectional view of edge perpendicular to ' A ' of first sealant of the line of the I-I ' line of Fig. 2 B, and wherein first sealant of predetermined portions is removed fully.

Fig. 3 B has illustrated the sectional view of edge perpendicular to ' A ' of first sealant of the line of the I-I ' of Fig. 2 B, wherein first sealant of predetermined portions is partly removed, and some first sealant 400a are formed on the predetermined space place from first or

second substrate

100 or 200.

Fig. 3 C has illustrated the exploded view of first sealant 400 of Fig. 2 B.In Fig. 3 C, first sealant 400 is with close-shaped formation, and wherein the width of the predetermined portions by applying laser first sealant is less than other parts of first sealant.That is, when pressure was applied to the predetermined portions of first sealant, the predetermined portions of first sealant was owing to little width is opened.

With reference to figure 3A and 3B, when removing the predetermined portions of first sealant 400, the opening that is used for liquid crystal is formed on wherein, and liquid crystal is discharged by opening whereby.When discharging liquid crystal, bubble may produce.

Shown in Fig. 3 C, replace in the predetermined portions of first sealant 400, forming opening, the predetermined portions of first sealant 400 has and reduces the close-shaped of width.That is, when pressure was applied to the predetermined portions of first sealant 400, the predetermined portions of first sealant 400 was opened by liquid crystal owing to first the reducing width of sealant 400.In this case, can prevent that when discharging liquid crystal bubble from producing.

If first sealant 400, can prevent that the inside of liquid crystal cells from contacting with extraneous air or moisture with close-shaped formation among Fig. 3 C.At this moment, preferably, the width of the predetermined portions of first sealant is formed between 0.25mm and the 0.6mm, prevents that bubble from producing when discharging liquid crystal with box lunch by the predetermined portions of first sealant.

The inlet 410 that forms in first sealant 400 and be used for liquid crystal is arranged at least one side (oblique line) that does not have grid and data pads of liquid crystal cells, so that make the illeffects minimum that is applied to pad during the amount of regulating liquid crystal in following step.

Thereafter, when pressure was applied to liquid crystal cells, shown in Fig. 2 C, liquid crystal was discharged to the outside of liquid crystal cells.

Fig. 2 C has illustrated the situation that too much liquid crystal is provided.If providing of liquid crystal is not enough, then with a spot of liquid crystal by 410 inside that are provided to liquid crystal cells that enter the mouth.

The amount of liquid crystal that is discharged to the liquid crystal cells outside depends on the pressure that is applied on the liquid crystal cells.Thereby according to the amount of liquid crystal that too much provides, selectivity is applied to pressure on the liquid crystal cells.

Thereafter, shown in Fig. 2 D, it is 410 sealed to enter the mouth.

The process of sealed entry 410 can comprise the steps: second sealant 430 is provided to the inlet 410 of first sealant 400, solidifies second sealant 430 then.

If use UV curing type second sealant 430, the process of then solidifying second sealant 430 is undertaken by applying the UV ray.

Second sealant 430 and first sealant 400 are formed by same material.

Hereinafter, will describe according to LCD device of the present invention.

Fig. 4 has illustrated the planimetric map of LCD device according to one preferred embodiment of the present invention, and wherein the amount of liquid crystal is controlled in this LCD device.Fig. 5 A has illustrated the LCD device along the I-I ' of Fig. 4.Fig. 5 B and 5C have illustrated along the sectional view of the multiple LCD device of the II-II ' of Fig. 4.

Shown in Figure 4 and 5 A, LCD device according to one preferred embodiment of the present invention comprises first substrate 100, second substrate 200, be formed on the liquid crystal layer 300 between first and

second substrates

100 and 200, be formed on first sealant 400 of liquid crystal layer 300 peripheries between first and

second substrates

100 and 200, this first sealant has second sealant 430 by inlet 410 that provides or discharge liquid crystal and the inlet 410 that seals first sealant 400.

Although do not illustrate, first substrate 100 comprises the black matrix layer that prevents that light from leaking, color filter layer that forms between each pattern of black matrix layer and the public electrode that forms on color filter layer.

Although do not illustrate, second substrate 200 comprises and intersecting each other to limit the grid line and the data line in unit pixel zone, is formed on the grid pad at grid line one end place and is formed on the data pads at data line one end place.Grid pad and data pads are corresponding to the oblique line of Fig. 4.

In addition, thin film transistor (TFT) forms adjacent to the intersection of grid line and data line, and wherein thin film transistor (TFT) plays switch.Equally, pixel capacitors is formed in the pixel area, and is electrically connected with thin film transistor (TFT).

Equally, the inlet 410 that is used to provide or discharge liquid crystal can form by the predetermined portions of removing first sealant 400 fully, shown in Fig. 5 B, perhaps can form by the predetermined portions that part be removed first sealant 400, shown in Fig. 5 C.In 5C, when part was removed the predetermined portions of first sealant 400, some first sealant 400a were formed on the predetermined space place from first or

second substrate

100 or 200.

Although do not illustrate, the inlet 410 that has remaining first sealant 400 and be used for liquid crystal is formed on predetermined portions.Explain that as Fig. 3 C inlet 410 can form according to open some first sealants with preset width by the liquid crystal of liquid crystal cells inside.Preferably, the width of the predetermined portions of first sealant is formed on 0, between 25mm and the 0.6mm.

Preferably, the inlet 410 that is used for liquid crystal is arranged at least one side that does not have grid pad and data pads (corresponding to a side of other parts of Fig. 4 except that oblique line) of liquid crystal cells.

First and

second sealants

400 and 430 can be formed by same material.

As mentioned above, LCD device according to the present invention has following advantage.

Even liquid crystal is not enough or offer the LCD panel too much, inlet is formed in the sealant.Thereby the amount that liquid crystal adjusting liquid crystal is provided or is discharged by the inlet by sealant is possible.

It will be understood by those of skill in the art that under the situation that does not break away from spirit of the present invention, the present invention can also have various modification and improvement.Therefore, the present invention covers these distortion and variation, as long as they are in the scope of claims and its equivalent.

Claims

1. the manufacture method of a liquid crystal indicator comprises:

Preparation is by first substrate, second substrate, the liquid crystal layer between first and second substrates, and the periphery of the liquid crystal layer between first and second substrates forms the liquid crystal cells that constitutes around first sealant of liquid crystal layer;

Measurement is provided to the amount of liquid crystal of the first sealant inside;

In first sealant, be formed for the inlet of liquid crystal;

Provide or discharge the amount that liquid crystal is regulated liquid crystal by inlet; And

Sealed entry.

2. according to the method for claim 1, it is characterized in that the process that is formed for the inlet of liquid crystal in first sealant comprises by applying the predetermined portions of laser ablation first sealant.

3. according to the method for claim 2, it is characterized in that the process by the laser ablation first sealant predetermined portions comprises the predetermined portions of removing first sealant fully.

4. according to the method for claim 2, it is characterized in that the process by the laser ablation first sealant predetermined portions comprises that part removes the predetermined portions of first sealant.

5. according to the method for claim 4, it is characterized in that the predetermined portions of described first sealant after part is removed and first or second substrate predetermined space of being separated by.

6. according to the method for claim 4, it is characterized in that, the predetermined portions of described first sealant after part is removed is formed between first and second substrates, and the predetermined portions of first sealant is reducing the close-shaped formation of width, thereby the predetermined portions of this first sealant is opened by the liquid crystal with pressure.

7. according to the method for claim 6, it is characterized in that the width of the predetermined portions of first sealant is between 0.25mm and 0.6mm.

8. according to the method for claim 1, it is characterized in that, the process of preparation liquid crystal cells is included on second substrate and forms grid pad and data pads, and the either side at least that does not have grid pad and data pads that the process that is formed for the inlet of liquid crystal in first sealant is included in liquid crystal cells forms inlet.

9. according to the method for claim 1, it is characterized in that the process of regulating amount of liquid crystal comprises the outside that a spot of liquid crystal is discharged to liquid crystal cells when liquid crystal is too much provided.

10. according to the method for claim 9, it is characterized in that the process of discharging too much liquid crystal comprises exerts pressure to liquid crystal cells.

11. the method according to claim 1 is characterized in that, the process of regulating amount of liquid crystal comprise when liquid crystal deficiency is provided the time a spot of liquid crystal is provided to the inside of liquid crystal cells by inlet.

12. the method according to claim 1 is characterized in that, the process of sealed entry comprises the inlet that second sealant is offered first sealant, and solidifies this second sealant.

13. the method according to claim 12 is characterized in that, first and second sealants are formed by same material.

14. the method according to claim 1 is characterized in that, measures the process of the amount of liquid crystal that offers liquid crystal cells inside and is undertaken by naked eyes.

15. the method according to claim 1 is characterized in that, the process of preparation liquid crystal cells comprises:

Prepare first and second substrates;

In first and second substrates, form first sealant on one of any;

With liquid crystal be assigned in first and second substrates one of any on; And

First and second substrates are bonded to each other together.

16. a liquid crystal indicator comprises:

First and second substrates;

Be formed on the liquid crystal layer between first and second substrates;

First sealant, close-shapedly has an inlet that is used to discharge or provide liquid crystal by applying in first sealant that laser forms with what reduce width, the liquid crystal layer of this first sealant between first and second substrates, wherein first sealant reduces width other parts less than first sealant; And

Second sealant is used to seal first sealant inlet.

17. the liquid crystal indicator according to claim 16 is characterized in that, the predetermined portions that the described inlet that is used for liquid crystal is removed first sealant by part forms, so that stay some first sealants.

18. the liquid crystal indicator according to claim 17 is characterized in that, the predetermined portions of described first sealant and first or second substrate predetermined space of being separated by.

19. liquid crystal indicator according to claim 17, it is characterized in that, the predetermined portions of described first sealant after part is removed is formed between first and second substrates, and the predetermined portions of first sealant is reducing the close-shaped formation of width, thereby the predetermined portions of this first sealant is opened by the liquid crystal with pressure.

20. the liquid crystal indicator according to claim 19 is characterized in that, the width of the predetermined portions of described first sealant is between 0.25mm and 0.6mm.

21. according to arbitrary described liquid crystal indicator in the claim 16 to 20, it is characterized in that first and second sealants are formed by same material,

22. according to arbitrary described liquid crystal indicator in the claim 16 to 20, it is characterized in that first substrate comprises grid pad and data pads, and the inlet that is used for liquid crystal is formed on the either side at least that does not have grid pad and data pads of liquid crystal cells.

23. the liquid crystal indicator according to claim 21 is characterized in that, first substrate comprises grid pad and data pads, and the inlet that is used for liquid crystal is formed on the either side at least that does not have grid pad and data pads of liquid crystal cells.