KR100954086B1 - Method for manufacturing liquid crystal display panel and cohesion substrate - Google Patents

Abstract

Disclosed are a manufacturing method and a bonded substrate of a liquid crystal display panel capable of improving the efficiency of an inspection process. After each of the first and second mother substrates is completed, the first and second mother substrates are combined to form a bonded substrate having a plurality of liquid crystal cells. Next, a test signal is applied to the plurality of liquid crystal cells to test the plurality of liquid crystal cells at the same time. Thereafter, the bonded substrate is cut in units of cells to form a liquid crystal display panel. Therefore, by inspecting a plurality of liquid crystal cells at the same time, the inspection process can be performed efficiently.

Description

Method for manufacturing liquid crystal display panel and bonded substrate {METHOD FOR MANUFACTURING LIQUID CRYSTAL DISPLAY PANEL AND COHESION SUBSTRATE}

1 is a view showing a unit bonding substrate according to an embodiment of the present invention.

2 is a process flowchart illustrating a process of completing a liquid crystal display panel.

3A is a plan view illustrating a first mother substrate manufactured in step S10 of FIG. 2.

3B is a plan view illustrating a second mother substrate manufactured in step S11 of FIG. 2.

FIG. 3C is a plan view of the bonded substrate manufactured in step S12 of FIG. 2.

3D is a plan view illustrating the LCD panel manufactured in step S17 of FIG. 2.

4 is a view showing a bonded substrate according to another embodiment of the present invention.

5 is a flowchart illustrating a process of completing a liquid crystal display panel according to another embodiment of the present invention.

FIG. 6 is an enlarged plan view of a portion A shown in FIG. 1.

7 is an enlarged plan view of a portion of a unit bonding substrate according to another exemplary embodiment of the present invention.

        <Explanation of symbols for the main parts of the drawings>

100: first mother substrate 200: second mother substrate

300: bonding substrate 350: unit bonding substrate                 

400: liquid crystal display panel 500: signal generator

IP1: 1st test pad part IP2: 2nd test pad part

L1: first wiring portion L2: second wiring portion

The present invention relates to a method for manufacturing a liquid crystal display panel and a bonded substrate, and more particularly, to a method for manufacturing a liquid crystal display panel and a bonded substrate that can improve the efficiency of the inspection process.

The liquid crystal display device includes a liquid crystal display panel including a first substrate, a second substrate provided to face the first substrate, and a liquid crystal layer interposed between the first substrate and the second substrate.

The liquid crystal display panel includes a plurality of gate lines extending in a first direction, a plurality of data lines extending in a second direction perpendicular to the first direction, a TFT provided in an area defined by the gate lines and the data lines; A plurality of pixels comprising a liquid crystal capacitor connected to the TFT is provided.

In general, the liquid crystal display panel is completed after the following process.

First, a first mother substrate in which a plurality of pixel portions are formed in a matrix form and a second mother substrate in which a plurality of color portions are formed in a matrix form are completed. The completed first and second mother substrates face each other to face each other, and are then joined by a coupling member interposed between the first mother substrate and the second mother substrate. This completes the bonding substrate.

One side wall of the sealant has an injection hole opened to inject liquid crystal between the first and second mother substrates. Thereafter, the bonded substrate is separated into a plurality of unit bonded substrates by cutting in a specific direction.

When the liquid crystal is injected between the first mother substrate and the second mother substrate through an injection hole provided in the unit bonding substrate, a liquid crystal layer is formed between the first mother substrate and the second mother substrate. As a result, the unit bonding substrate is provided with a plurality of liquid crystal cells.

Thereafter, the unit bonding substrate is cut in units of cells to complete the liquid crystal display panel. After the liquid crystal display panel is completed, a process for checking whether the liquid crystal display panel operates normally is performed.

However, since the inspection process is performed at the stage where the liquid crystal display panel is completed, the inspection process must be performed separately for each of several completed liquid crystal display panels. Therefore, the time required for the inspection process becomes long, and accordingly, the efficiency of the inspection process and the productivity of the liquid crystal display panel decrease.

Accordingly, it is an object of the present invention to provide a method for manufacturing a liquid crystal display panel for improving the efficiency of the inspection process.

Another object of the present invention is to provide a bonded substrate for improving the efficiency of the inspection process.

In the method of manufacturing a liquid crystal display panel according to the present invention for achieving the above object, after forming a first mother substrate, a second mother substrate, the plurality of liquid crystals by combining the first and second mother substrate. A cemented substrate having a cell is formed. An inspection signal is applied to the plurality of liquid crystal cells to inspect the plurality of liquid crystal cells at the same time, and the bonded substrate is cut in cell units to form a liquid crystal display panel.

According to another aspect of the present invention, a bonded substrate includes a first mother substrate and a second mother substrate coupled to face the first mother substrate.

The bonded substrate may include a plurality of liquid crystal cells including a pixel portion provided on the first mother substrate, a color portion provided on the second mother substrate, and a liquid crystal layer interposed between the pixel portion and the color portion. An inspection pad unit to which an inspection signal for inspecting each of the cells is input and a wiring unit for connecting the plurality of liquid crystal cells and the inspection pad unit are provided.

According to the manufacturing method and the bonded substrate of the liquid crystal display panel, a bonded substrate having a plurality of liquid crystal cells is formed, and then a plurality of liquid crystal cells are simultaneously tested by applying a test signal to the plurality of liquid crystal cells. Thereafter, the bonded substrate is cut in units of cells to form a liquid crystal display panel. Therefore, by inspecting a plurality of liquid crystal cells at the same time, the inspection process can be performed efficiently.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention.

1 is a view showing a unit bonding substrate according to an embodiment of the present invention.                     

Referring to FIG. 1, first and sixth liquid crystal cells 351, 352, 353, 354, 355, and 356 are provided in a unit bonding substrate according to an exemplary embodiment of the present invention. In addition, the unit bonding substrate may include a first test pad configured to receive a test signal from the signal generator 500 to test a first group G1 including the first to third liquid crystal cells 351, 352, and 353. A second test pad unit receiving a test signal from the signal generator 500 to test the unit IP1 and the second group G2 that is the fourth to sixth liquid crystal cells 354, 355, and 356. IP2). Here, the first test pad part IP1 is provided on the left side of the unit bonding substrate 350, and the second test pad part IP2 is provided on the right side of the unit bonding substrate 350.

The unit bonding substrate 350 has a first wiring part L1 connecting the first group G1 and the first test pad part IP1 and the second group G1 and the second test pad part. The second wiring portion L2 for connecting the IP2 is provided.

The first wiring part L1 may include first to third test lines IL1, IL2, and IL3 for connecting each of the first to third liquid crystal cells 351 to 353 to the first test pad part IP1. And the second wiring part L2 includes fourth to sixth test lines for connecting each of the fourth to sixth liquid crystal cells 354 to 356 to the second test pad part IP2. IL4, IL5, IL6).

Here, the unit bonding substrate 350 is the result of the process of completing the liquid crystal display panel of the liquid crystal display device. In addition, each of the first to sixth liquid crystal cells 351 to 356 is an area for completing the liquid crystal display panel.

The first and second test pad units IP1 and IP2 are connected to output terminals of the signal generator 500, respectively, to receive the test signal from the signal generator 500. The test signal output from the signal generator 500 is applied to the first group G1 through the first wiring part L1 via the first test pad part IP1. In addition, the test signal is applied to the second group G2 through the second wiring part G2 via the second test pad part IP2.

Therefore, the test signal applied to each of the first to sixth liquid crystal cells 351 to 356 drives each of the first to sixth liquid crystal cells 351 to 356, and then visually checks whether it is normally operated. Can be checked

Hereinafter, a step of performing the inspection process (hereinafter referred to as V / I inspection) and a structure of the unit bonding substrate 350 will be described in detail.

2 is a flowchart illustrating a process of completing a liquid crystal display panel according to an exemplary embodiment of the present invention.

3A is a plan view of the first mother substrate manufactured in step S10 of FIG. 2, and FIG. 3B is a plan view of the second mother substrate manufactured in step S11 of FIG. 2. 3C is a plan view of the bonded substrate manufactured in step S12 of FIG. 2, and FIG. 3D is a plan view showing the liquid crystal display panel manufactured in step S17 of FIG. 2.

First, referring to FIGS. 2 and 3A, a first mother substrate 100 having a plurality of pixel parts PP in a matrix form is completed (S10). Each of the pixel units PP includes a plurality of gate lines GL and a plurality of data lines DL insulated from and orthogonal to the plurality of gate lines GL. Each pixel area defined by the gate lines GL and the data lines DL includes a thin film transistor (TFT) 110 and a pixel electrode 120 connected to the TFT 110. ) Is provided.

Next, referring to FIGS. 2 and 3B, a second mother substrate 200 having a plurality of color units CP formed in a matrix form is completed (S11). The plurality of color parts CP is provided in the area corresponding to the pixel part PP of the first mother substrate 100 by the number of the plurality of pixel parts PP. Each of the color units CP includes a color filter (not shown) including R (red), G (green), and B (blue) color pixels, and a common electrode (not shown) formed on the color filter.

2 and 3C, when the completed first and second mother substrates 100 and 200 face each other such that the pixel electrode and the common electrode face each other, the first and second mother substrates 100 and 200 face each other by the coupling member 310. The first and second mother substrates 100 and 200 are combined. Thus, the bonding substrate 300 is completed (S12).

The sealant 310 is interposed between the first mother substrate 100 and the second mother substrate 200, and the first and second mother substrates 100 and 200 are disposed on one side wall of the sealant 310. ) And an injection hole 311 opened to inject liquid crystal between them.

Thereafter, the bonding substrate 300 is cut in the first direction D1 to be separated into a plurality of unit bonding substrates 350 (S13).

As shown in FIG. 2 and FIG. 1, the first mother substrate 100 and the second mother substrate 200 are formed through an injection hole provided in the unit bonding substrate 350 cut from the bonding substrate 300. When the liquid crystal is injected therebetween, the liquid crystal layer is formed between the first mother substrate 100 and the second mother substrate 200 (S14). Thereafter, the injection hole is sealed with the same material as the sealant 310 and the liquid crystal layer is prevented from flowing out between the first and second mother substrates 100 and 200.

According to this process, the unit bonding substrate 350 has a pixel portion PP of the first mother substrate 100, a color portion CP of the second mother substrate 200, and the pixel portion PP. And first to sixth liquid crystal cells 351 to 356 formed of the liquid crystal layer formed between the color unit CP and the color unit CP.

Thereafter, the first to sixth liquid crystal cells 351 to 356 provided on the unit bonding substrate 350 are simultaneously inspected (S15). As illustrated in FIG. 1, the first to sixth liquid crystal cells 351 to 356 are provided by providing the test signals output from the signal generator 500 to the first to sixth liquid crystal cells 351 to 356, respectively. ) Can be checked.

When the inspection is finished, the unit bonding substrate 350 is cut in units of cells (S16). 2 and 3D, the first substrate 410, the second substrate 420 facing the first substrate 410, the first substrate 410, the second substrate 420, A liquid crystal display panel composed of a liquid crystal layer interposed between is completed (S17).

4 is a view showing a bonded substrate according to another embodiment of the present invention.

Referring to FIG. 4, the bonded substrate according to another embodiment of the present invention includes first to sixth regions A1, A2, A3, A5, and A6 having the same structure. Hereinafter, the structure of the first area A1 will be described to replace the description of the second to sixth areas A2 to A6. First to sixth liquid crystal cells 351 to 356 are provided in the first area A1.                     

On the left side of the first area A1, a first test pad unit IP1 receiving an inspection signal for inspecting each of the first to third liquid crystal cells 351 to 353 from the signal generator 800, and the A first wiring part L1 for connecting each of the first to third liquid crystal cells 351 to 353 and the first test pad part IP1 is provided.

In addition, a second test pad unit IP2 that receives a test signal for inspecting each of the fourth to sixth liquid crystal cells 354 to 356 from the signal generator 800 on the right side of the first area A1. And a second wiring part L2 for connecting each of the fourth to sixth liquid crystal cells 354 to 356 and the second test pad part IP2, respectively.

The bonded substrate 700 is the result of the process of completing the liquid crystal display panel of the liquid crystal display device. The bonded substrate 700 will be described in detail with reference to FIG. 5. In addition, each of the first to sixth liquid crystal cells 351 to 356 is an area for completing the liquid crystal display panel.

The first and second test pad units IP1 and IP2 are connected to output terminals of the signal generator 800, respectively, to receive the test signal from the signal generator 800. The test signal output from the signal generator 800 passes through the first and second test pad parts IP1 and IP2 through the first and second wiring parts L1 and L2. 6 are applied to the liquid crystal cells 351 to 356, respectively.

The test signal applied to the first to sixth liquid crystal cells 351 to 356 drives the first to sixth liquid crystal cells 351 to 356, and the driven first to sixth liquid crystal cells 351. 356) Check by visually confirming whether each is operating normally.

As such, by simultaneously inspecting the liquid crystal cells provided in the first to sixth regions A1 to A6 of the bonded substrate 700, the V / I process time may be reduced.

5 is a flowchart illustrating a process of completing a liquid crystal display panel according to another embodiment of the present invention.

Referring to FIG. 5, a first mother substrate in which a plurality of pixel portions are formed in a matrix form is completed (S20), and a second mother substrate in which a plurality of color portions are formed in a matrix form is completed (S21).

Thereafter, the liquid crystal is dropped into the mother substrate of any one of the first mother substrate and the second mother substrate. Next, the first mother substrate and the second mother substrate are opposed to each other and bonded by a coupling member (hereinafter, a sealant) to complete a bonding substrate including a plurality of liquid crystal cells (S23).

Thereafter, a plurality of liquid crystal cells provided on the bonded substrate are simultaneously examined. As shown in FIG. 4, the plurality of liquid crystal cells are inspected by providing test signals output from a signal generator to the plurality of liquid crystal cells, respectively (S24). Among the plurality of liquid crystal cells, the liquid crystal cell which is confirmed to be in a bad state is repaired or poorly processed, and the liquid crystal cells which are confirmed in a good state are cut (S25).

Next, a liquid crystal display panel including a first substrate, a second substrate facing the first substrate, and a liquid crystal layer interposed between the first substrate and the second substrate is completed (S26).

FIG. 6 is an enlarged plan view of a portion A shown in FIG. 1. In FIG. 6, the sixth liquid crystal cell 356 is described to replace the description of the first to fifth liquid crystal cells 351 to 355 having the same structure.

Referring to FIG. 6, the sixth liquid crystal cell 356 includes a display portion DP for displaying an image and a peripheral portion SP formed around the display portion DP. The display unit DP includes a pixel portion of the first mother substrate, a color portion provided on the second mother substrate, and a liquid crystal layer interposed between the pixel portion and the color portion.

The pixel portion extends in a plurality of gate lines GL extending in a second direction D2, in a third direction D3 perpendicular to the second direction D2, and insulated from the plurality of gate lines GL. It includes a plurality of pixels defined in a matrix by a plurality of intersecting data lines DL. Each of the plurality of pixels is connected to a TFT 110 and a drain electrode of the TFT 110 and is an indium tin oxide (ITO) or indium zinc oxide (IZO), which is a transparent conductive material. A pixel electrode 120 is formed. The pixel portion further includes an auxiliary electrode line SL facing the pixel electrode 120 and the insulating layer therebetween.

A gate check line GIL coupled to one end of the plurality of gate lines GL and electrically connected to the gate lines GL, and one end of the plurality of data lines DL may be connected to the peripheral portion SP. A data test line DIL is coupled to the data line to electrically connect the data lines DL. In addition, the peripheral part SP is provided with an auxiliary electrode test line SIL coupled to one end of the auxiliary electrode lines SL to electrically connect the auxiliary electrode lines SL.                     

In addition, each of the gate inspection line GIL, the data inspection line DIL, and the auxiliary electrode inspection line SIL may be drawn out of the sixth liquid crystal cell 356 to be disposed at the right end of the unit bonding substrate 350. It extends to the provided 2nd test pad part IP2. The second test pad part IP2 may include a gate test pad GIP extended from the gate test line GIL, a data test pad DIP extended from the data test line DIL, and the auxiliary electrode test line ( It may include a plurality of test pad groups having an auxiliary electrode test pad (SIP) extended from the SIL.
Each of the test pad groups may correspond one-to-one to each of the liquid crystal cells 351 to 356.

Therefore, when a gate check signal is provided from the signal generator 500 to the gate check pad GIP, the gate check signal is provided to the gate line GL through the gate check line GIL. In addition, when a data check signal is provided from the signal generator 500 to the data check pad DIP, the data check signal is provided to the data line DL through the data check line DIL. When the auxiliary electrode signal is provided from the signal generator 500 to the auxiliary electrode test pad SIP, the auxiliary electrode signal is provided to the auxiliary electrode line SL through the auxiliary electrode test line SIL.

When the sixth liquid crystal cell 356 is driven by the gate inspection signal, the data inspection signal, and the auxiliary electrode signal, the abnormality of the screen displayed on the sixth liquid crystal cell 356 is determined.

7 is an enlarged plan view of a portion of a unit bonding substrate according to another exemplary embodiment of the present invention. However, by describing the sixth liquid crystal cell 356, the description of the first to fifth liquid crystal cells 351 to 355 having the same structure is replaced.

Referring to FIG. 7, the sixth liquid crystal cell 356 includes a display portion DP for displaying an image and a peripheral portion SP formed around the display portion DP. The display unit DP includes a pixel portion of the first mother substrate, a color portion provided on the second mother substrate, and a liquid crystal layer interposed between the pixel portion and the color portion.

The peripheral portion SP includes a first gate check line GIL1 coupled to one end of odd-numbered gate lines GL1 of the plurality of gate lines and even-numbered gate lines GL2 of the plurality of gate lines. A second gate check line GIL2 coupled to one end is provided. The first gate check line GIL1 electrically connects the odd-numbered gate lines GL1, and the second gate check line GIL2 electrically connects the even-numbered gate lines GL2.

In addition, the peripheral part SP includes a first data test line DIL1 coupled to one end of odd-numbered data lines DL1 of the plurality of data lines and even-numbered data lines DL2 of a plurality of data lines. A second data check line DIL2 is coupled to one end of the. The first data test line DIL1 electrically connects the odd-numbered data lines DL1, and the second data test line DIL2 electrically connects the even-numbered data lines DL2.

In addition, the first and second gate inspection lines GIL1 and GIL2 and the first and second data inspection lines DIL1 and DIL2 are drawn to the outside of the sixth liquid crystal cell 356 so that the unit bonding substrate 350 is provided. It extends to the 2nd test pad part IP2 provided in the right end part of ().                     

The second test pad part IP2 may include a first gate test pad GIP1 extending from the first gate test line GIL1 and a second gate test pad GIP2 extending from the second gate test line GIL2. ). In addition, the second test pad part IP2 may include a first data test pad DIP1 extended from the first data test line DIL1 and a second data test pad extended from the second data test line DIL2. (DIP2) is further provided.

The peripheral part SP may further include third and fourth gate test pads GIP3 and GIP4 extending from the first and second gate test lines GIL1 and GIL2, respectively. In addition, the peripheral part SP may further include third and fourth data test pads DIP3 and DIP4 extended from the first and second data test lines DIL1 and DIL2, respectively.

When the sixth liquid crystal cell 356 is driven by the gate inspection signal and the data inspection signal, a defect in the screen of the sixth liquid crystal cell 356 may be determined.

According to the manufacturing method of the liquid crystal display panel and the bonded substrate, the first and second mother substrates are combined to form a bonded substrate having a plurality of liquid crystal cells, and then a plurality of liquid crystal cells are applied by applying a test signal to the plurality of liquid crystal cells. Examine the cells at the same time. Thereafter, the bonded substrate is cut in units of cells to form a liquid crystal display panel.

Therefore, after the bonded substrate including the plurality of liquid crystal cells is completed, the inspection process for simultaneously inspecting the plurality of liquid crystal cells may be performed, thereby reducing the time required for the inspection process. Therefore, the efficiency of an inspection process can be improved and productivity of the said liquid crystal display panel can be increased.

Although described with reference to the embodiments above, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the invention as set forth in the claims below. Could be.

Claims (10)

Forming a first mother substrate having a plurality of gate lines and a plurality of pixel portions having a plurality of data lines insulated from and perpendicular to the gate lines; Forming a second mother substrate; Combining the first and second mother substrates to form a bonded substrate having a plurality of liquid crystal cells; Inspecting the plurality of liquid crystal cells simultaneously by applying a test signal to the plurality of liquid crystal cells through an inspection pad unit having pad groups corresponding to each of the liquid crystal cells to inspect the liquid crystal cells; And Cutting the bonded substrate by cell units to form a liquid crystal display panel; Each of the pad groups may include a first test pad for receiving a first test signal from a signal generator and providing the first test signal to the gate line, and a second test pad for receiving a second test signal from the signal generator and providing the test signal to the data line. Method of manufacturing a liquid crystal display panel comprising a test pad. The method of claim 1, wherein the forming of the bonded substrate comprises: Combining the first and second mother substrates; Cutting the bonded first and second mother substrates into the bonded substrate; And And injecting liquid crystal into the cut substrate to form the plurality of liquid crystal cells. The method of claim 1, further comprising: dropping a liquid crystal onto the first mother substrate before forming the bonded substrate. A bonded substrate comprising a first mother substrate having a plurality of gate lines and a plurality of data lines insulated from and perpendicular to the gate lines, and a second mother substrate facing and coupled to the first mother substrate. A plurality of liquid crystal cells including a pixel part provided on the first mother substrate, a color part provided on the second mother substrate, and a liquid crystal layer interposed between the pixel part and the color part; An inspection pad unit having pad groups one to one corresponding to each of the liquid crystal cells to inspect the liquid crystal cells; And A wiring part for connecting the plurality of liquid crystal cells and the test pad part; Each of the pad groups may include a first test pad for receiving a first test signal from a signal generator and providing the first test signal to the gate line, and a second test pad for receiving a second test signal from the signal generator and providing the test signal to the data line. A bonded substrate comprising a test pad. The method of claim 4, wherein the pixel unit, A plurality of gate lines; A plurality of data lines insulated from and perpendicular to the plurality of gate lines; A switching element connected to the gate line and the data line; And And a pixel electrode connected to the switching element. delete The bonding substrate of claim 5, wherein the pixel unit further comprises auxiliary electrode lines insulated from and facing the pixel electrode. 8. The bonded substrate of claim 7, wherein the test pad unit further comprises a third test pad configured to receive a third test signal from the signal generator and provide the third test signal to the auxiliary electrode line. 8. The bonded substrate of claim 7, wherein the first test signal is a gate driving voltage for driving the switching element, the second test signal is a data voltage, and the third test signal is an auxiliary voltage. The method of claim 8, wherein the wiring portion, A first test line for electrically connecting the first test pad and the gate lines; A second test line for electrically connecting the second test pad and the data lines; And And a third test line for electrically connecting the third test pad and the auxiliary electrode lines.

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