KR20010058185A - Lcd panel - Google Patents

Abstract

PURPOSE: An LCD(liquid crystal display) panel is to prevent a foreign material from being trapped by an aligning film of the LCD panel, thereby preventing a displaying spot and thus improving performance of the LCD panel. CONSTITUTION: A lower substrate(11) has a pixel electrode formed in the shape of an active matrix. An aligning film(13) is formed on a surface of the lower substrate. A main seal(15) is formed at an edge of the lower substrate to have a liquid crystal injecting port(17) in the form of a bottleneck. An upper substrate is bonded to the lower substrate. Liquid crystal is injected through the liquid crystal injecting port between the upper and lower substrates to form a liquid crystal layer. An end seal(18) blocks the liquid crystal injecting port. The aligning film is formed at an inner portion restricted by the main seal, and extended to the liquid crystal injecting port, that is, formed to have the same bottleneck as that of the main seal.

Description

Liquid crystal display panel {LCD PANEL}

The present invention relates to a liquid crystal display panel, and more particularly, to a liquid crystal display panel which can prevent display irregularities by preventing foreign substances from entering the panel during liquid crystal injection.

In general, a liquid crystal display panel has an active matrix type in which a gate bus line and a data bus line are disposed, a lower substrate including pixel electrodes, an upper substrate provided with color filters and a common electrode, and a liquid crystal layer filled between upper and lower substrates. Include. At this time, an alignment film for controlling the arrangement direction of liquid crystal molecules in the liquid crystal layer is interposed between the lower substrate surface and the liquid crystal layer and between the upper substrate and the liquid crystal layer.

In such a liquid crystal display panel, the bonding of the upper and lower substrates and the liquid crystal layer injection are formed by the following method.

As shown in FIG. 1, a gate bus line (not shown), a data bus line (not shown), and a pixel electrode (not shown) are formed on the edge of the lower substrate 1 formed in an active matrix form. A seal 2: the main seal is formed. In this case, the main seal 2 includes the liquid crystal injection hole 10 and is formed to open the liquid crystal injection hole 10. Then, after the upper substrate (not shown) is thermally bonded, the upper and lower substrates are annealed by vacuum, and the liquid crystal is injected into the liquid crystal injection hole 10 to form a liquid crystal layer (not shown). The inlet 10 is then sealed with an end seal 4: and then a module product such as a polarizer (not shown) is attached. Here, reference numeral 3 denotes an alignment layer formed on the upper or lower substrate. In this case, the alignment layer 3 is disposed to be spaced apart from the injection hole by a predetermined distance.

The alignment layer 3 is generally formed of a polymer layer, and the polymer layer includes a main chain and a side chain. Here, the side chains anchor the liquid crystal molecules to control the directivity of the liquid crystal molecules, as well as trap foreign substances in the liquid crystal layer. In this case, when the alignment layer 3 is disposed adjacent to the liquid crystal injection hole 10, foreign substances that may be injected during the liquid crystal injection or before and after the liquid crystal injection are trapped in the side chain of the alignment layer 3 around the injection hole, and thus, the liquid crystal injection hole (10) Smudges occur around and inside. Accordingly, conventionally, the alignment layer 3 is disposed to be spaced apart from the liquid crystal injection hole 10.

However, even when the alignment layer 3 is spaced apart from the liquid crystal injection hole 10 as described above, foreign substances are continuously introduced, and the foreign substances thus introduced are trapped in the side chain of the alignment layer 3 inside the liquid crystal display panel. As a result, spots due to foreign matters are generated in the center of the liquid crystal display panel.

Accordingly, an object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a liquid crystal display panel capable of preventing foreign substances from being trapped in the alignment layer in the liquid crystal display panel and preventing display irregularities. .

1 is a plan view showing a conventional liquid crystal display panel.

2 is a plan view showing a liquid crystal display panel of the present invention.

(Explanation of symbols for the main parts of the drawing)

11 lower substrate 13 alignment layer

13a: alignment film portion formed in the liquid crystal injection hole portion

15 main chamber 17 liquid crystal injection hole

18: And seal

In order to achieve the above object of the present invention, the present invention, the lower substrate having a pixel electrode formed in the form of an active matrix; An alignment layer formed on a surface of the lower substrate resultant; A main seal formed at the edge of the lower substrate and having a bottleneck shape liquid crystal injection hole at one edge of the lower substrate; An upper substrate bonded to the lower substrate; A liquid crystal layer injected between upper and lower substrates through a liquid crystal injection hole of the main chamber; And an end seal for blocking the liquid crystal injection hole, wherein the alignment layer is formed inside a section defined by the main chamber and extends to protrude toward the liquid crystal injection hole.

According to the present invention, the alignment layer is formed to extend to the inner portion of the liquid crystal injection hole in the bottleneck form defined by the main chamber. Accordingly, foreign substances injected during or before the liquid crystal injection are mostly trapped in the alignment film portion formed in the liquid crystal injection hole portion. Accordingly, since the foreign matters are blocked from being injected into the liquid crystal display panel, screen stains may be blocked. Therefore, the image quality characteristic of the liquid crystal display panel is improved.

(Example)

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

2 is a plan view illustrating a liquid crystal display panel according to the present invention.

First, referring to FIG. 2, a lower substrate 11 having a gate bus line (not shown), a data bus line (not shown), and a pixel electrode (not shown) in an active matrix form is prepared. An alignment layer 13 is formed on the lower substrate 11.

The sealing main seal 15 is formed at the upper edge of the resultant lower substrate 11. In this case, the main seal 15 has a bottleneck liquid crystal injection hole 17 at one side edge, the liquid crystal injection hole 17 is formed to be open.

In this case, the alignment layer 13 is formed inside the lower substrate defined by the main seal 15, and protrudes toward the liquid crystal injection hole 17, that is, has a bottleneck portion like the shape of the main seal 15.

Then, an upper substrate (not shown) having a color filter (not shown) and a common electrode (not shown) are formed on the lower substrate 11, and then thermally bonded. Subsequently, the space between the upper and lower substrates is annealed by vacuum, and the liquid crystal is injected through the liquid crystal injection hole 17 to form a liquid crystal layer (not shown). Then, the liquid crystal injection hole 17 is sealed with the end seal 18, and after the liquid crystal display panel is completed, a module product such as a polarizing plate (not shown) is attached.

As such, the alignment layer 17 is formed to extend into the liquid crystal injection hole 17 in a bottleneck shape, so that foreign substances injected into or before or after the liquid crystal injection are formed in the liquid crystal injection hole 17. Most of the traps are trapped in the side chain of the alignment film 13a formed in the liquid crystal injection hole 17. At this time, since the liquid crystal injection hole 17 is not a portion seen on the screen, even if a stain occurs in this portion, the user cannot recognize it. Therefore, since foreign matters are blocked from being injected into the liquid crystal display panel, display stains on the screen may be blocked.

As described in detail above, according to the present invention, the alignment layer is formed to extend to the inner portion of the liquid crystal injection hole in the bottleneck form defined by the main seal. Accordingly, foreign substances injected during or before the liquid crystal injection are mostly trapped in the alignment film portion of the liquid crystal injection hole portion. Accordingly, since foreign substances are mostly trapped in the alignment layer of the liquid crystal injection hole portion which is not recognized on the screen, injection of the foreign substances into the liquid crystal display panel is blocked, thereby preventing screen irregularities.

In addition, this invention can be implemented in various changes within the range which does not deviate from the summary.

Claims (1)

A lower substrate having a pixel electrode formed in the form of an active matrix; An alignment layer formed on a surface of the lower substrate resultant; A main chamber formed at the edge of the lower substrate and having a bottleneck shape liquid crystal injection hole at one edge of the lower substrate; An upper substrate bonded to the lower substrate; A liquid crystal layer injected between upper and lower substrates through a liquid crystal injection hole of the main chamber; And An end seal for blocking the liquid crystal injection hole, And the alignment layer is formed inside a section defined by the main chamber and extends to protrude toward the liquid crystal injection hole.