JPS63287826A - Production of active matrix display device - Google Patents

Abstract

PURPOSE:To prevent breakdown by static electricity at the time of panel assembly and other handling by electrically short circuiting the respective line electrode wires and array electrode wires of an array substrate in parallel during formation of the respective electrode wires or after the completion of the substrate. CONSTITUTION:Both of the plural line electrode wires a1-a9 and the plural array electrode wires b1-b8 are respectively electrically short circuited, lines to line and arrays to arrays, in parallel by using conducting members A1, A2 and B1, B2 during formation of the active matrix array substrate or after the completion thereof. The panel is thereafter assembled and after the defective panel is relieved, the members A1, A2 and B1, B2 are removed in the final to disconnect the line and array electrode wires a1-a9 and b1-b7. The capacity of the line electrode wire groups and the capacity of the array electrode wire groups can be thereby increased and the breakdown of the array substrate by the static electricity is obviated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing an active matrix display device that can provide a large capacity and high quality display.

BACKGROUND OF THE INVENTION FIG. 3 shows an example of a schematic electrical wiring diagram on an active matrix array substrate, and shows a matrix of 9 rows and 8 columns. In FIG. 3, ``a'' is a row electrode line, and ``b1'' and ``b1'' are column electrode lines. Further, at each intersection, a switching element such as a thin film transistor, typically indicated by Qxx, and a picture element electrode, typically indicated by dll, are installed. A liquid crystal display is produced by arranging an active matrix array substrate with such 7 electrical wirings and another counter substrate on which transparent electrodes are formed on at least a portion of the main surface to face each other in parallel, and sealing a liquid crystal between them. A device is manufactured.

FIG. 4 shows a flowchart of a general manufacturing process for a liquid crystal display device. In FIG. 4, after the array substrate manufacturing process 1 is completed, the disconnection/short circuit inspection process 2 for defects such as disconnections and short circuits begins, and then the panel assembly process 3 involves gluing the opposing substrate and the array substrate together to sandwich the liquid crystal. Let's do it. After the panel assembly process 3 is completed, an image inspection process 4 begins, and defective products undergo a repair process 5, a shipping inspection process 6, and are shipped.

Problems to be Solved by the Invention However, in the manufacturing process of the liquid crystal display device as described above, static electricity is often generated in the array substrate manufacturing process 1, the panel assembly process 3, the defective panel relief process 5, etc. When handling or transferring, static electricity is charged and discharged to specific row or column electrode lines. A switching element such as a thin film transistor connected to a specific row electrode line or column electrode line that has been charged or discharged with static electricity may be connected to other row or column electrode lines that have not been charged or discharged with static electricity. The original performance often deteriorates due to exposure to a large potential difference. In particular, after the active matrix array substrate and the counter substrate have been subjected to liquid crystal alignment treatment, they are laminated together, liquid crystal is injected, and a polarizing plate is attached. In panel assembly process 3, the array substrate was often destroyed by static electricity.

Therefore, as shown in FIG. 5, the row electrode lines a0 to a.

and column electrode lines b□ to b, and conductive members A□, A2. B□.

B2. By electrically shorting C, D, E, and F, no electrostatic voltage is applied between the rows and columns, and damage to the array substrate due to static electricity is prevented.

However, with such an electrostatic countermeasure pattern, it is not possible to carry separate signals for rows and columns, so it is impossible to carry out tests such as transistor characteristics inspection, disconnection/short circuit inspection, and image inspection. As shown in the figure, the electrostatic countermeasure pattern had to be formed and removed up to three times as necessary during the manufacturing process, assembly process, and relief process.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and aims to provide a method for manufacturing an active matrix display device that can reduce the number of times an electrostatic countermeasure pattern is formed and removed.

Means for Solving the Problems In order to solve the above problems, the present invention provides a plurality of row electrode lines, a plurality of column electrode lines that intersect with the row electrode lines, and the row electrode lines and column electrode lines. A method for manufacturing an active matrix display device comprising an active matrix array substrate having a switching element and a pixel electrode at the intersection with a counter substrate having a transparent electrode on at least a portion thereof, and a liquid crystal sandwiched between these substrates. During or after the manufacture of the active matrix array substrate, one or both ends of at least one of the row electrode lines and the column electrode lines are electrically parallel to each other. A short circuit is made, and then the liquid crystal is sandwiched by bonding with the counter substrate, and the electrical short circuit is cut off after a predetermined inspection.

Effect With the above configuration, the row electrode lines and the column electrode lines are electrically short-circuited in parallel at the same time as each electrode line of the array substrate is formed or after the array substrate is completed, so that it is easy to use during panel assembly, image inspection, and other handling. It is possible to prevent damage caused by static electricity, and it is also possible to measure the characteristics of the array substrate and display panel even in this state.
The number of times the electrostatic countermeasure pattern is formed and removed can be reduced compared to the conventional method, and costs can be reduced.

Example An embodiment of the present invention will be described below based on the drawings.

FIG. 1 is a schematic plan view of a matrix array substrate of an active matrix display device according to an embodiment of the present invention. In FIG. 1, during or after manufacturing the active matrix array substrate, a plurality of row electrode lines a to a9 and a plurality of column electrode lines b to b8 are connected to each other. The conductive members A1. A
2 and B1. B.

After that, as shown in the flowchart of FIG. 2, the panel assembly process 3 is performed, and after the defective panel relief process 5, the conductive members A, , A2 and B1 are finally connected in parallel. ．． By removing B2, a plurality of row and column electrode lines a□ to a and b□ to b7 are separated.

In this way, the row electrode lines a□ to a9 and the column electrode lines b1 to b
By short-circuiting s in parallel, the row electrode lines,
When the specific capacitance of each column electrode line is Ca, Cb, the number of row electrode lines is m, and the number of column electrode lines is n,
Capacitance mca of row electrode line group and capacitance nCb of column electrode line group
It is possible to achieve a large capacity, reduce the effects of static electricity, and reduce damage to the array substrate due to static electricity.

In other words, if static electricity is charged and discharged in a specific electrode line with the row or column electrodes separated,
When the amount of static electricity is Q, the potentials generated in the row and column electrode lines are Va=Q/Ca (11) vb=Q/cb (2). On the other hand, when the respective electrode lines are short-circuited in parallel, the potentials generated at the row and column electrodes are such that the electrostatic charges are distributed throughout, and Va' = Q / m Ca
--(3) Vb'=Q/nCb ・------・(
4), and the effect of static electricity on the array substrate is
The number of column electrode lines is reduced by the reciprocal of the number of row and column electrode lines.

On the other hand, in the image inspection step 4 of the panel assembly step 3, a signal similar to that used to operate a liquid crystal display device is applied to each of the conductive members A□, A, B, or B2 to simulate the operation of the liquid crystal display device. Because image tests can be performed,
It is possible to prevent damage caused by static electricity generated during handling from the time the panels are sorted to the time they are assembled into a display device.

Furthermore, at the stage of array electrical inspection, the row electrode lines and the column electrode lines are electrically short-circuited by the conductive member A or A 2 HBl or B2, so the conductive member A
By applying a signal to one location of 1 or A, , B□ or B2, it is possible to inspect short circuits between rows and columns on the array substrate and other defects, thereby simplifying the array inspection itself.

In this way, in the panel manufacturing process shown in Figure 2, most inspections can be performed with the anti-static pattern still in place, so the formation and removal of the anti-static pattern can be completed in one or two times, compared to conventional methods. The manufacturing process can be greatly simplified compared to the previous three times. For example, in Figure 2,
It becomes possible to use the process (a) or (b),
A special effect can be obtained in that the number of times of formation and removal of electrostatic countermeasure patterns can be reduced.

In addition, in Fig. 1, we have explained the case where both the row electrode line and the column electrode line are electrically short-circuited at both ends, but this is the best example to maximize the effect. It is. However, it is not limited to the example shown in FIG.
Other examples include only A1 in FIG. 1, only B1, or only electrode wires such as A1 and B1 that are susceptible to destruction by static electricity, or by electrically shorting one or both ends of the electrode wires in parallel. can also be expected to be effective.

Effects of the Invention As described above, according to the method for manufacturing an active matrix display device of the present invention, each of the row electrode lines and column electrode lines is electrically connected simultaneously with the formation of each electrode line of the array substrate or after the completion of the array substrate. Since they are short-circuited in parallel, it is possible to prevent damage due to static electricity during panel assembly, image inspection, and other handling, and it is also possible to measure the characteristics of the array substrate and display panel even in this state. Therefore, it is possible to reduce the number of times the electrostatic countermeasure pattern is formed and removed, and costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of a matrix array substrate of an active matrix display device in one embodiment of the manufacturing method of the present invention, FIG. 2 is a flow diagram showing the manufacturing process of the matrix array substrate, and FIG. 3 is a matrix array substrate. FIG. 4 is a flow diagram showing the manufacturing process of a conventional matrix array substrate, and FIG. 5 is a schematic plan view of the matrix array substrate in the conventional manufacturing method. a~a9...row electrode line, b~b8...column electrode line, c1□...switching element, dxx...pixel electrode, A□. A,, B□, B2... Conductive member. Agent Yoshihiro Morimoto 1st figure y 5゜az % aq--1 line denmen bt -bs--1 row 1 RuchenCn-1-sufuy+n 2 bare hands dtt-11 squeeze blue sickle A, A2. Btlh-4'l Haru Figure 2 Figure 3 Figure 4 Figure 5 t

Claims (1)

[Claims] 1. an active matrix array substrate having a plurality of row electrode lines, a plurality of column electrode lines intersecting the row electrode lines, and switching elements and picture element electrodes at the intersections of the row electrode lines and the column electrode lines; A method for manufacturing an active matrix display device comprising a counter substrate having a transparent electrode on at least a portion thereof and a liquid crystal sandwiched between these substrates, the method comprising: during or after manufacturing the active matrix array substrate; One end or both ends of at least one of the row electrode wire and the column electrode wire are electrically shorted in parallel between the rows and the columns, and then bonded to the counter substrate to sandwich the liquid crystal, and A method of manufacturing an active matrix display device, which disconnects the electrical short circuit after inspection.