JPS5918711B2 - Display panel manufacturing method - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for manufacturing a display panel in which an electro-optical substance such as a liquid crystal or an electrochromic substance is sealed, and enables low-cost mass production of display panels by an unprecedented manufacturing method. ing.

Conventionally, various methods for manufacturing display panels have been proposed, but they can be roughly divided into two methods: one method involves processing a single substrate and then bonding or sealing the substrates together, and the other method involves manufacturing multiple large substrates. There are several methods for processing, bonding or sealing large substrates together, and finally separating them into multiple display panels.
The advantage of the single-unit method is that it has a high yield, but it has the disadvantage that only one display panel can be manufactured in one process.

In addition, although a plurality of display panels can be manufactured in one process in the multiple method, the yield is lower than that in the single method. The present invention aims to improve the yield in multiple methods and simplify the separation process.

For the above purpose, in the present invention, two substrates forming a display panel have the same planar external shape, and a plurality of display pattern electrodes are formed on a large substrate capable of manufacturing a plurality of display panels. The feature is that after a large substrate is bonded or sealed, it is separated into a plurality of display panels.

With reference to FIG. 1, a method of manufacturing a liquid crystal display panel with different outer shapes of upper and lower substrate glasses using multiple conventional methods will be described.

On the large upper glass 1 shown in FIG. 1, three 7-segment type display pattern electrodes 2 are formed using transparent films such as In2O3 and SNO2. Four cutting grooves 4 are machined in the front of the large lower glass 3. A common electrode 5 is also formed. The sealing part 6 is formed by firing low melting point glass powder, and the gap l between the upper and lower glasses is as thin as about 5μ to 1·0μ. Liquid crystal □ is injected and sealed. A cutting line 8 of the large upper glass 1 and a cutting line 9 of the large lower glass 3 are shown. FIG. 2 is a plan view. FIG. 3 shows a separated liquid crystal display panel, in which the upper glass substrate 10 and the lower glass substrate 11 have different external shapes, and the lower glass substrate 11 is smaller because of the lead portion to the drive circuit.

FIG. 4 shows the state of cutting the large lower glass 3, in which the diamond blade 12 of the slicing machine advances until it reaches the cutting groove 4.

At this time, if the cut is excessive, the display pattern electrode 2 will be cut, and the display panel will be defective.
In this way, the conventional multiple method requires three cutting steps: providing the cutting groove 4, cutting the large lower glass 3 along the cutting line 9, and cutting the large upper glass 1 along the cutting line 8. , and if the cut is over-cut, a defect will occur.

5 to 8 show a method of manufacturing a liquid crystal display panel according to an embodiment of the present invention, in which a large glass substrate 13 can be used for both the upper and lower sides, display pattern electrodes 2, common electrodes 5
, a sealing section 6, and a liquid crystal 7 are shown.

The common cutting line 14 is at the same location on the top and bottom, and the cutting process is 1
It is a process. FIG. 6 is a plan view. FIG. 7 shows a separated liquid crystal display panel, in which the small glass substrates 15 have the same outer shape on the top and bottom, and lead electrodes 16 are provided as leads to the drive circuit after cutting.

FIG. 8 shows an enlarged view of this lead electrode 16.
A part of the lead electrode 16 is inserted into the gear of 5 to 10 μm, and is electrically connected to the display pattern electrode 2.

As a method for forming the lead electrode 16, in addition to the CVD method and the PVD method, a thick film screen printing method, a dispensing method, etc. are used. In addition, this lead electrode 16 can also serve as an electrode transfer process for the common electrode 5, and is particularly suitable for manufacturing display panels for calculators, etc., in which there are many electrode transfer parts of the common electrode 5, such as those using a matrix drive system. , the effect of shortening the process is significant.

FIG. 9 shows another embodiment in which 18 display panels can be manufactured at the same time, and a solder sealing portion 17 is shown.

Further, although an example is shown in which the large glass substrate 13 is used for both the upper and lower parts, it is also possible to use a thinner substrate only for the lower part, or it is also possible to use a thinner board only for the upper part. As described above, according to the present invention, a display panel is formed by adhering or sealing two substrates having the same planar external shape and enclosing an electro-optic material such as a liquid crystal or an electrochromic material therein. In manufacturing, multiple display pattern electrodes are formed on a large substrate capable of manufacturing multiple display panels, the large substrate is bonded or sealed, and then separated into multiple display panels. Compared to the method of
Processes can be omitted, and defects caused by over-cutting are eliminated.
It is only necessary to add one step to form the lead electrode 16, which can be mass-produced, and the production effect is large.

In addition to using a slicing machine, the cutting process may also include an etching process using hydrofluoric acid, a laser cutting process using a laser, or the like.

[Brief explanation of the drawing]

Figures 1 to 4 show a conventional display panel manufacturing method, where Figure 1 is a cross-sectional view of the display panel, Figure 2 is a plan view, Figure 3 is a perspective view, and Figure 4 is a cut of the lower glass part. 5 to 8 show an embodiment of the present invention, FIG. 5 is a sectional view of the display panel section, FIG. 6 is a plan view, FIG. 7 is a perspective view, and FIG. FIG. 8 is an enlarged view of the lead electrode portion, and FIG. 9 is a plan view showing another embodiment. 2...Display pattern electrode, 14...Common cutting line, 16...Lead electrode, 13...
...Large glass substrate.

Claims (1)

[Claims] 1. In a manufacturing method for producing a plurality of display panels by bonding a large upper glass substrate and a large lower glass substrate, each having a plurality of display pattern electrodes, through a sealing part and then cutting them individually, the large upper glass substrate The substrate and the large lower glass substrate are simultaneously cut along a common cutting line that intersects with the lead portions of the display pattern electrodes, and lead electrodes are provided on the side surfaces resulting from the cutting to connect to the lead portions of the display pattern electrodes. A method for manufacturing a featured display panel.