JPH045990B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a liquid crystal display panel in which a liquid crystal drive electrode pattern is provided on one glass substrate constituting a liquid crystal cell using thin film transistors.

[Prior Art] Liquid crystal panels provided with thin film transistors are used as various display devices, but there is a problem in increasing their size. There are two ways to increase the size: one is to use glass with a large area, and the other is to connect multiple panels.

[Problems to be Solved by the Invention] When using large glass to increase the size of the panel, equipment, equipment, masks, jigs, etc. are required for this purpose, resulting in poor yields and problems with uniform characteristics. It has the disadvantage of being difficult to visualize, making it difficult to put it into practical use. Those that use a plurality of panels have drawbacks such as a complicated configuration and the need for a large number of lead connections and drive circuits. Another disadvantage is that since the patterns of each panel are different from each other, a different mask must be prepared for each panel.

[Means for Solving the Problem] According to the present invention, the substrate on which the thin film elements of an active matrix liquid crystal display panel are formed is formed using a plurality of small substrates arranged in a square shape. A method for manufacturing a liquid crystal display panel comprising: a central portion where the thin film elements are formed; and an outer portion where lead lines extend along each side outside the central portion and connect the thin film elements vertically and horizontally. Each of the small substrates is formed by forming a plurality of substrates having the same shape and cutting a predetermined boundary between the central portion and the outer portion of each of the substrates according to the arrangement position of each of the small substrates. Features.

[Example] Example 1 In FIGS. 1 and 2, a liquid crystal display panel 1 according to the present invention has four independent rectangular liquid crystal cells A,
B, C, and D are arranged in a square shape on a polarizing plate 2, sandwiched between another polarizing plate 3, and fixed with adhesive layers 4 and 5. In this case, the polarizing plates 2 and 3 also function as supporting substrates for panels A, B, C, and D. In each cell, lower glass substrates 6A, 6B, 6C, 6D forming drive electrodes and upper glass substrates 7A, 7B, 7C, 7D forming common electrodes are sealed with sealant 8, and injection port 9 A liquid crystal 10 is injected inside. Glass substrate 6A, 6
Thin film transistors are patterned in B, 6C, and 6D to form liquid crystal drive electrodes, and in this example, gate line leads 11 are formed on the left and right, and source line leads 12 are formed on the top and bottom. For example, cell A
The gate line lead 11 is located on the left side, and the source line lead 12 is located on the upper side. Similarly, the other cells B, C, and D have a source line lead formed on one side and a gate line lead formed on the other side. A common lead 13 is further formed on the glass substrates 6A, 6B, 6C, and 6D, and is connected to a common electrode provided on the glass substrates 7A, 7B, 7C, and 7D. Connection with the drive circuit is made by connecting four circuits that drive the gate and source of each cell to each panel. Another method is to connect all of the left and right gate line leads 11 and upper and lower source line leads 12 with an external wiring board, and drive them by combining them with one drive circuit that drives all gates and all sources. good. In any case, since the drive electrodes of the glass substrates 6A, 6B, 6C, and 6D of each cell are driven independently, there is no need to connect the gate line leads 11 or the source line leads 12 to each other. The glass substrate 6A,
6B, 6C, and 6D can be configured as follows. As shown in FIG. 5, a gate line lead 11, a source line lead 12, and a common lead 13 are formed around drive electrodes formed by thin film transistors patterned on a glass plate 14, and this glass plate is used for A-line, B-line, The glass substrates 6A, 6 are cut along either the c line or the d line.
Obtain B, 6C, and 6D. For example, glass substrate 6A
can be obtained by cutting the glass plate 14 along b-line and d-line. Then, as shown in FIG. 6, these glass substrates 6A, 6B, 6C, and 6D are arranged in a square shape to form a panel. By doing this, when forming a thin film transistor, one type of mask is sufficient without preparing a separate mask for each panel.

Embodiment 2 In FIGS. 3 and 4, the glass substrate 21 provided with the drive electrodes on the lower side of the liquid crystal display panel 20 is made up of four parts 21A, 21B, 21C, and 21D aligned in a square shape. On the other hand, the glass substrate 22 on which the upper common electrode is provided is made of a single glass plate. When assembling, the support board 23
Attach four glass substrates 21A to 21D with adhesive 24.
, and then attach the glass substrate 2 with sealant 25.
2 to form a liquid crystal cell 30, and then polarizing plates 26 and 27 are attached to form a liquid crystal display panel 20. The wiring in this case is also the same as in the first embodiment, and each glass substrate 21A, 21B, 21
There is no need to connect the gate line leads 28 and source line leads 29 of C and 21D.

Note that the glass substrate 21 provided with these drive electrodes
A, 21B, 21C, and 21D can be obtained by cutting predetermined portions of a glass plate provided with one type of electrode pattern as shown in the fourth figure, in the same manner as described in the first embodiment.

Note that if a polarizing plate is used for the support substrate 23 in this embodiment, the lower polarizing plate 26 becomes unnecessary.

[Effects of the Invention] According to the present invention, a plurality of small substrates arranged in a box shape can be formed by cutting a predetermined portion of a substrate of the same shape according to the arrangement position of each small substrate.
There is no need to prepare a mask for each small substrate.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIG. 1 is a plan view of an embodiment of a liquid crystal display panel according to the present invention, with the upper polarization area removed, and FIG.
3 is a plan view of another embodiment, FIG. 4 is a sectional view taken along the line of FIG. 3, FIG. 5 is a plan view of a glass plate provided with drive electrodes, and FIG.
FIG. 3 is a plan view showing a state in which four glass substrates obtained by cutting the glass plate shown in the figure at predetermined locations are arranged in a cross-section shape. 1...Liquid crystal display panel, 6A, 6B, 6C, 6
D...Glass substrate (small substrate), 14...Glass plate (substrate), 20...Liquid crystal display panel, 21A, 21
B, 21C, 21D...Glass substrate (small substrate).

Claims (1)

[Scope of Claims] 1. Manufacture of a liquid crystal display panel in which the substrate on which the thin film elements of an active matrix liquid crystal display panel are formed is formed using a plurality of small substrates arranged in a square shape. In the method, a plurality of substrates having the same shape each having a central part on which the thin film element is formed and an outer part having lead lines extending along each side outside the central part and connecting the thin film elements vertically and horizontally. and cutting a predetermined boundary between the central portion and the outer portion of each of the substrates according to the arrangement position of each of the small substrates,
A method for manufacturing a liquid crystal display panel, comprising forming each of the above-mentioned small substrates.