JPH0354520A - Manufacture of liquid crystal display device - Google Patents

Abstract

PURPOSE:To facilitate the manufacture as to sticking operation and cutting operation by performing the sticking operation and cutting operation by using a substrate for a liquid crystal display device which is provided with marks aligned almost in the same array with terminal electrodes arrayed at a main surface end part of a glass substrate. CONSTITUTION:The glass substrate is used to manufacture four panels at a time and this glass substrate shown in a plan is turned over and stuck, and cut and separated along a cutting line (a) to obtain the four panels. Here, termi nal electrodes 5 ... should be exposed for connections with an external driving device after display device formation and they are arrayed at relatively wide intervals to facilitate discrimination even in a transparent volume layer state, so the marks 7 ... are provided on positions in the same array. The marks 7 ... are used for position discrimination (b) ... at the time of the sticking opera tion and also serve to display cutting positions (a) ... with their upper and lower ends.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method for manufacturing a liquid crystal display using a glass substrate and easy to manufacture.

(b) Conventional technology In general, liquid crystal displays have electrodes (l3) (
+3) between two substrates (11) m) with a liquid crystal (l
8), but since the shape of the electrodes (1.3) (13) forms a picture element (pixel), the two substrates (11) (
11) must be pasted together with high precision. For this reason, conventionally published Utility Model Application No. 56-1.3266 and Utility Model Application No. 58
Similar to the lamination between the display panel and the opaque substrate as shown in Japanese Patent Application Laid-open No. 88625 and Japanese Patent Application Laid-open No. 58-162981, alignment marks are placed inside the display device along with the patterning of the electrodes (13) and (13). Then, they performed the pasting work according to the alignment marks.

(c) Problems to be solved by the invention However, in recent years, as improvements in display quality have been required, specifications have been issued stating that it is better for the electrodes (13) (13) to be invisible when not lit; (13) The material of (13),
The specifications are satisfied by balancing the refractive index with the liquid crystal alignment films (16) (16). Therefore, although the alignment mark is placed outside the area shown to the observer as a display surface (so-called effective display surface) when incorporated into a device, if it is located inside the display device, the alignment mark (+6 )(16
) and there is a lot of light scattering, making identification extremely difficult. This is not only because the shape of the alignment mark cannot be distinguished, but because both substrates are transparent and the gap between them (thickness of the liquid crystal layer) is narrow, it is difficult to tell which substrate the mark is on, and the workability of bonding is poor. also means Also, when placed at the position of the surrounding sealing materials (19) (19), although there is almost no alignment film, the sealing materials (19) (19) are in an uncured state and opaque during the process that requires alignment work. Not practical.

(2) Means for Solving the Problems The present invention has been made in consideration of the above-mentioned points, and alignment marks indicating the positions of bonding and cutting in accordance with the rows of terminal electrodes are provided so as not to be covered with the alignment film. The display device substrates are stacked and cut based on the process and the alignment marks.

(E) Effect This makes it easy to distinguish aligned terminal rows even on a transparent glass substrate, so alignment marks that are in the same row as the terminal row and without an alignment film can be identified even when the glass is laminated. Since there is a direct air layer between them, the positional relationship in the thickness direction can also be determined.

In addition, this glass substrate is cut based on this easy-to-identify alignment mark to expose the terminals, so the alignment mark is not noticeable to the display viewer after manufacturing, and since one mark is missing, it is difficult to connect with other parts. It is also possible to perform alignment.

(f) Example FIG. 2(a) is a liquid I11 for explaining an example of the present invention.
1 is a plan view of the display substrate, and FIG. 2(b) is a cross-sectional view illustrating the bonded state thereof. In the figure, (1) is 4
A glass substrate for manufacturing the panels at once.The same one as shown in Figure 2(a) is turned over and pasted together as shown in Figure 2(b), and then cut along the cutting lines (A), (A), etc. Separate to obtain 4 panels. (Then, liquid crystal is injected into each panel to form a liquid crystal display.) Therefore, this glass substrate has an upper side':
The fLri and lower electrodes are provided alternately in 2#1 each. (2
) (2)... are the electrodes made of transparent electrode material, display electrodes (3) (3)... and lead electrodes (4) (4
)... and the terminal electrodes (5) (5) that are aligned at the end of the main surface when forming the display. (6) (6
) is an alignment film provided at least in the above-mentioned effective display area. (7) (7)... is the terminal electrode (
5) Transparent 1t provided in the same row as (5)... and #'t
A positioning mark made of pole material, for example in a checkered pattern.

In the above structure, the terminal electrodes (5), (5), etc. must be exposed because they are connected to an external drive means after the display is formed, and they are arranged at relatively wide intervals. Focusing on the fact that it is easy to identify even when transparent materials (glass, membrane) are laminated, alignment marks (7) are placed in the same position.
)(7)... is provided. It is more preferable that these alignment marks (7), (7), etc. be located on the outside of the terminal row as shown in the figure, rather than in the center of the row. When multiple panels are efficiently manufactured at once using one sheet as in this example, the terminal portion of the panel located in the center overlaps the upper glass substrate and the lower glass substrate, and the cutting position (A) (
b) is out of alignment.

Therefore, the positioning muffs (7) (7)... serve as position identification (B) (mouth) (B) when pasting together, and the lower end of the 7-hook marks the cutting positions (A), (A), etc. It can also be used for display.

(G) Effects of the Invention As described in 12 above, the present invention is capable of bonding and cutting using a liquid crystal display substrate provided with alignment marks in approximately the same row as the terminal electrodes aligned at the end of the main surface of the glass substrate. Therefore, the alignment marks can be easily identified even on a substrate whose pattern is made inconspicuous by an alignment film or the like, and manufacturing operations such as bonding and cutting operations are facilitated. Furthermore, since the terminal is cut based on this alignment mark and the terminal is exposed, the alignment mark is not noticeable to the display viewer after manufacturing.
Since there is no mark on one side, it is also possible to align it with other parts.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a liquid crystal display, FIG. 2(a) is a plan view of a substrate for a liquid crystal display according to a failed example of the present invention, and FIG. 2(b) is a sectional view illustrating the bonded state. be. (1)...Glass substrate, (2)(2)...'8 poles, (3)(3)
...Display electrode, (4)(4)...Lead electrode, (5)(5)...Terminal electrode, (6)(6)...・Alignment film, (7) (7)... Positioning mark.

Claims (1)

[Claims] (1) On the main surface of the glass substrate, excluding electrodes including aligned terminal electrodes, alignment marks arranged in approximately the same line as the terminal electrodes, and parts with terminal electrodes and alignment marks,
A step of forming a display substrate by providing an alignment film on at least the effective display portion, bonding two display substrates to each other based on the alignment marks, and bonding the display substrates to each other based on the alignment marks. A method for manufacturing a liquid crystal display, comprising the step of cutting.