KR20060082638A - Liquid crystal display - Google Patents

Abstract

The liquid crystal display according to the present invention is connected to a first insulating substrate, a plurality of gate lines and data lines intersecting on the first insulating substrate, and a plurality of thin film transistors and thin film transistors connected to the gate lines and the data lines. A thin film transistor display panel having a plurality of pixel electrodes, a second insulating substrate facing the thin film transistor display panel, a light blocking member formed on the second insulating substrate, the light blocking member having a plurality of openings and a plurality of openings, a plurality of color filters formed in the openings, A color filter display panel including a common electrode formed on the color filter, a liquid crystal filled between the thin film transistor array panel and the color filter display panel, and sealed by a sealing material having a liquid crystal injection hole, the light hole corresponds to the liquid crystal injection hole.

Liquid crystal, liquid crystal injection, organic BM, SEAL

Description

Liquid crystal display {LIQUID CRYSTAL DISPLAY}

1 is a layout view of a liquid crystal display according to an exemplary embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II 'of FIG. 1.

FIG. 3 is a cross-sectional view taken along the line III-III ′ of FIG. 1.

4 is an enlarged layout view of a display area of a lower panel in the liquid crystal display illustrated in FIG. 1.

5 is a flowchart illustrating a method of forming a liquid crystal display according to an exemplary embodiment of the present invention.

* Description of symbols on the main parts of the drawings *

110, 210: substrate

220: light blocking member

250: covering film

270 common electrode

310: sealing material

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device formed by a liquid crystal injection method.

In general, a liquid crystal display device includes two substrates on which electrodes are formed and a liquid crystal material injected between the two substrates, each of which is printed at the periphery of the two substrates and is bonded by a sealing material that traps the liquid crystal material. It is supported by spacers scattered on the surface.

The liquid crystal display device displays an image by applying an electric field to a liquid crystal material having an anisotropic dielectric constant injected between two substrates by using an electrode, and controlling the amount of light transmitted through the substrate by adjusting the intensity of the electric field. to be.

In the method of manufacturing a liquid crystal display device, an alignment film for aligning liquid crystal molecules of a liquid crystal material is applied to two substrates, an alignment treatment is performed, a spacer is formed on one of the substrates, and a sealing material having a liquid crystal injection hole is printed around. do. Next, the two substrates are aligned, and then the two substrates are attached through a hot press process, a liquid crystal injection process is performed to inject a liquid crystal material between the two substrates through the liquid crystal injection hole, and then the liquid crystal injection hole is sealed to seal the liquid crystal cell. Make.

At this time, the liquid crystal injection hole should be accurately found and sealed in a short time. However, a light blocking member for preventing light leakage of a pixel is formed on one substrate of the liquid crystal display, and it is difficult to accurately locate the liquid crystal injection hole because it is covered by the light blocking member.

When the light blocking member is formed of chromium, chromium oxide, or the like, the thickness of the light blocking member is thin so that the position of the liquid crystal injection hole is easily found. Currently, a technology for forming the light blocking member using an organic material containing a black pigment has been developed. .

Since the light blocking member formed of the organic material has to be much thicker than the light blocking member formed of chromium in order to block light leakage, it is difficult to find the position of the liquid crystal injection hole.

Therefore, the liquid crystal injection hole may not be sealed accurately, resulting in a defect of the liquid crystal panel, and the yield is reduced.

An object of the present invention is to provide a liquid crystal display device which can increase the yield by reducing the liquid crystal defect by accurately finding the liquid crystal injection hole while forming a light blocking member made of an organic material.

A liquid crystal display according to the present invention for achieving the above object is a plurality of thin film transistors connected to a first insulating substrate, a plurality of gate lines and data lines formed on the first insulating substrate, the gate lines and data lines. A thin film transistor array panel having a plurality of pixel electrodes connected to the thin film transistor, a second insulating substrate facing the thin film transistor array panel, a light blocking member formed on the second insulating substrate and having light holes and a plurality of openings, and formed in the opening A plurality of color filters, a color filter display panel including a common electrode formed on the color filter, a liquid crystal filled between a thin film transistor array panel and a color filter display panel and sealed by a sealing material having a liquid crystal injection hole, and including a light hole Corresponds to the liquid crystal injection hole.                     

Here, the overcoat formed on the color filter may be further included.

And it is preferable that a light shielding member consists of a black organic substance.

In addition, each color filter preferably displays one of red, green, and blue.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. Like parts are designated by like reference numerals throughout the specification. When a part of a layer, area, plate, etc. is said to be "on" another part, this includes not only the other part "directly over" but also another part in the middle. On the contrary, when a part is "just above" another part, there is no other part in the middle.

A thin film transistor array panel according to an exemplary embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

1 is a layout view of a liquid crystal display according to an exemplary embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line II-II 'of FIG. 1, and FIG. 3 is taken along line III-III' of FIG. 1. 4 is a cross-sectional view of the display panel of FIG. 1 in which the display area of the lower panel is enlarged.                     

1 and 2, the liquid crystal display according to the exemplary embodiment of the present invention is filled between the opposing thin film transistor array panel 100, the color filter panel 200, and the two display panels 100 and 200. The liquid crystal layer 300 is included. The liquid crystal layer is sealed by the sealing material 310 formed to have the liquid crystal injection hole P. The two display panels 100 and 200 are supported by the columnar spacer 320.

The liquid crystal display may include a compensation film (not shown), a polarizer (not shown), and a backlight device disposed on the front or side of the thin film transistor array panel 100. unit) (not shown) may be further included.

1, 2, and 4, the thin film transistor array panel 100 will be described in detail. The insulating substrate 110 of the thin film transistor array panel 100 made of a transparent insulating material such as glass may be insulated from and cross over. A plurality of gate lines 121 and data lines 171 are formed. The gate line 121 transfers a scan signal and the data line 171 transfers an image signal.

The plurality of pixel areas P defined by the gate line 121 and the data line 171 together form a display area D for displaying an image of the liquid crystal display. One end of the gate line 121 and the data line 171 extends to the peripheral area beyond the display area D in order to receive an external signal. The remaining portion of the liquid crystal display except for the display area D is called a peripheral area.

Thin film transistors TFTs, which are switching elements, are formed in the plurality of pixel regions P, and the thin film transistors TFT turn on and off image signals according to scan signals.

Each TFT is connected to a pixel electrode 190 made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO), and the pixel electrode 190 is a thin film transistor (TFT). Is applied to the image signal voltage. In the reflective liquid crystal display, the pixel electrode 190 may not be made of a transparent material, and in this case, the lower polarizer and the lower compensation film are also unnecessary.

Next, the color filter display panel 200 will be described in more detail with reference to FIGS. 1 to 3. The insulating substrate 210 of the color filter display panel 200 includes a light blocking member called a black matrix for preventing light leakage. (light blocking member) 220 is formed. The light blocking member 220 has a plurality of openings facing the pixel electrode 190 and having substantially the same shape as the pixel electrode 190. The light blocking member 220 may further include a portion facing the thin film transistor and may extend only along the data line 171.

The light blocking member 220 is formed of an organic material including a black pigment. And the light blocking member 220 has a light hole (H). 1 and 3, the light hole H is formed at the same position as the liquid crystal injection hole P. Referring to FIGS.

A plurality of color filters 230 is also formed on the substrate 210. The color filter 230 faces the pixel electrode 190 and displays one of primary colors such as red, green, and blue in correspondence with each pixel electrode 190. can do.

An overcoat 250 is formed on the color filter 230 to prevent the color filter from being exposed and to provide a flat surface. The overcoat 250 also removes the step of the light blocking member 220 due to the light hole H. Therefore, the entrance of the liquid crystal injection hole P due to the light hole H is prevented from growing.

The common electrode 270 made of a transparent conductor such as ITO or IZO is formed on the overcoat 250.

The columnar spacer 320 is formed on the common electrode 270. The columnar spacer 320 may be made of an organic insulating material, and is formed through a photographic process. The columnar spacer 320 is mainly formed to correspond to the thin film transistor, but may also be formed at a portion corresponding to the data line 171 or the gate line 121. It is also formed at the edge of the substrate.

The columnar substrate spacer 320 may be replaced with a spherical or ellipsoidal substrate spacer disposed between the two display panels 100 and 200 in a scattering manner.

An alignment film (not shown) is formed on the common electrode 270.

Next, a method of forming a liquid crystal display using the thin film transistor array panel and the color filter panel will be described with reference to the accompanying drawings. 5 is a flowchart illustrating a method of forming a liquid crystal display according to an exemplary embodiment of the present invention.                     

Referring to FIG. 5, first, a thin film transistor array panel and a color filter display panel which have been finished up to an alignment process are prepared, respectively (S1). The spacer is formed on the color filter display panel or the thin film transistor array panel (S2).

After that, the sealing material for confining the two display panels while confining the liquid crystal material is printed (S3). At this time, the sealing material is formed to have a liquid crystal injection hole, as shown in FIG.

Then, the two display panels are pressed using a hot press to form a liquid crystal cell (S4). The liquid crystal is injected into the liquid crystal cell using the liquid crystal injector (S5).

In more detail, the process of injecting the liquid crystal is first loaded into the chamber for the liquid crystal injector, and then the air inside the chamber is discharged. Then, the air inside the chamber is discharged to make the inside of the chamber for the liquid crystal injector high vacuum, and then the liquid crystal cell is immersed in the container for liquid crystal injection so that the liquid crystal inlet is completely immersed in the liquid crystal material. At this time, the inside of the liquid crystal cell surrounded by the sealing material also becomes a high vacuum state.

Then, while inert gas is injected into the chamber for the liquid crystal injector, the interior of the chamber for the liquid crystal injector is brought into a low vacuum or atmospheric pressure state. Then, since the inside of the chamber for the liquid crystal injector is in a low vacuum or atmospheric pressure state and the inside of the liquid crystal cell surrounded by the sealing material is in a high vacuum state, the liquid crystal material is injected into the inside of the liquid crystal cell surrounded by the sealing material through the liquid crystal injection hole.

After the liquid crystal is injected into the cell in this manner, the liquid crystal is removed from the chamber and the liquid crystal injection hole P is sealed (S6). In this case, the liquid crystal injection hole P may be easily found by the light transmitted through the light hole H formed in the light blocking member 220.

As described above, the light hole can be used to easily find the liquid crystal injection hole, thereby minimizing the defect rate of the liquid crystal panel due to the sealing failure of the liquid crystal injection hole.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims (4)

A plurality of gate lines and data lines intersected on the first insulating substrate, the plurality of thin film transistors connected to the gate lines and the data lines, and the plurality of pixel electrodes connected to the thin film transistors. Thin film transistor display panel, A second insulating substrate facing the thin film transistor array panel, a light blocking member formed on the second insulating substrate, the light blocking member having a light hole and a plurality of openings, a plurality of color filters formed in the openings, and formed on the color filter A color filter display panel including a common electrode, A liquid crystal filled between the thin film transistor array panel and the color filter display panel and sealed by a sealing material having a liquid crystal injection hole, The light hole corresponds to the liquid crystal injection hole. In claim 1, The liquid crystal display device further comprising an overcoat formed on the color filter. In claim 1, The light blocking member is a liquid crystal display device made of a black organic material. In claim 1, Wherein each of the color filters displays one of red, green, and blue.

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