KR20060073824A - Color filter array panel and liquid crystal display including thesame - Google Patents

Abstract

The color filter display panel according to the present invention includes an insulating substrate, a color filter formed on the insulating substrate, an overcoat formed on the color filter and having a groove, a common electrode formed on the overcoat and formed along the inside of the groove. do

LCD, spacer, beads, light leakage

Description

COLOR FILTER ARRAY PANEL AND LIQUID CRYSTAL DISPLAY INCLUDING THESAME}

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

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

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

4 is a cross-sectional view illustrating a part of a color filter display panel of the liquid crystal display illustrated in FIG. 1.

5A and 5B are cross-sectional views illustrating a method of manufacturing a color filter display panel according to an exemplary embodiment of the present invention, in the order of their processes.

※ Code explanation about main part of drawing ※

110, 210: insulated substrate 121: gate line

171: data

190 pixel electrode 220 black matrix

230R, 230G, 230B: color filter 270: common electrode

310: sealing material 320: spacer

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device having a bead spacer.

Liquid crystal display (LCD) is one of the most widely used flat panel display devices. Currently, two display panels are provided with a field generating electrode and a polarizer and the liquid crystal contained therebetween. Layer.

By applying an electric field to the liquid crystal layer between the two display panels to change the orientation of the liquid crystal to induce a change in the polarization state of the light passing through it and the amount of light passing through the polarizing plate according to the polarization state is a device for displaying an image.

A constant cell gap must be maintained between the upper panel and the lower panel. An active spacer is used for this purpose. As the active spacer, bead spacers and column spacers are used. Among them, the columnar spacers are formed by photolithography, and thus may be selected and formed in a fixed position, but the photolithography process is added to complicate the process, and when pressing the upper and lower display panels. Light leakage or the like occurs due to the collapse phenomenon.

The bead spacer is more advantageous than the column spacer in terms of simplicity and ease of fabrication, but moves with the liquid crystal when the liquid crystal is injected because it is floating in the liquid crystal display device. In this case, when the moving pressure and the moving distance are large, the alignment layer and the like may be bent, and thus light loss occurs.

Therefore, the technical problem of the present invention is to minimize the defects such as light loss due to the floating of the spacer by placing the bead spacer selectively in the desired position, minimizing the floating phenomenon of the spacer.

Color filter display panel according to the present invention for achieving the above object is formed on the insulating substrate, the color filter formed on the insulating substrate, the color filter, the overcoat having a groove, formed on the overcoat and along the inside of the groove It includes a common electrode formed.

The light blocking pattern may further include a light blocking pattern formed on the insulating substrate and having a plurality of openings.

In this case, the color filters are preferably formed in the openings displaying red, green, and blue colors.

In accordance with another aspect of the present invention, a liquid crystal display device includes a first insulating substrate, a gate line and a data line intersecting and crossing the first insulating substrate, and a thin film transistor and a thin film transistor connected to the gate line and the data line. A thin film transistor array panel including a pixel electrode and a thin film transistor array panel facing the thin film transistor array panel, a color filter formed on the second insulating substrate, a second insulating substrate, formed on the color filter, and formed on the overcoat and the overcoat having a groove. A color filter display panel including a common electrode formed along the groove, a liquid crystal filled between the thin film transistor array panel and the color filter display panel, a bead gap corresponding to the groove and maintaining a constant distance between the thin film transistor array panel and the color filter display panel Contains ash.

The light blocking pattern may further include a light blocking pattern formed on the second insulating substrate and formed to correspond to the gate line and the data line.

The groove is preferably formed at a position corresponding to the portion where the gate line and the data line overlap.

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, layer, area, plate, etc. is over another part, this includes not only the part directly above the other part but also another part in the middle. On the contrary, when a part is just above another part, it means that 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 the line II-II ′ of FIG. 1, and FIG. 3 is a cross-sectional view of the lower panel of the liquid crystal display shown in FIG. 1. 4 is an enlarged layout view of the display area, and FIG. 4 is a cross-sectional view illustrating a part of a color filter display panel of the liquid crystal display shown in FIG. 1.

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. The two display panels 100 and 200 are supported by the bead 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 3, 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. Here, 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, referring to FIGS. 1 and 4, the color filter display panel 200 will be described in more detail. A light blocking member called a black matrix for preventing light leakage from the insulating substrate 210 of the color filter display panel 200 ( A 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 may be formed of a single layer of chromium or a double layer of chromium and chromium oxide, or may be formed of an organic layer including a black pigment.                     

A plurality of color filters 230R, 230G, 230B are also formed on the substrate 210. The color filters 230R, 230G, and 230B face the pixel electrode 190 and have a band shape extending in the vertical direction, and include red (RED) 230R, green (230), and blue (BLUE) 230B. One of primary colors such as) may be displayed.

An overcoat 250 is formed on the color filter 230 and the light blocking member 230 to prevent the color filter from being exposed and to provide a flat surface. The overcoat 250 is formed with a groove H that is thinner than other portions.

The common electrode 270 formed of a transparent conductor such as indium tin oxide (ITO) or indium zinc oxide (IZO) is formed on the overcoat 250.

The bead spacer 320 is formed on the common electrode 270. The spacer 320 is mainly formed in a portion corresponding to the light blocking pattern 220 and is positioned in the groove H formed in the overcoat 250. This groove H traps the bead spacer 320 in the groove H to prevent the spacer 320 from floating on the substrate. Therefore, light leakage due to floating of the spacer 320 may be prevented.

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

Next, a method of manufacturing a color filter display panel according to an exemplary embodiment of the present invention will be described with reference to FIGS. 5A to 5B and FIG. 2 described above.

5A and 5B are cross-sectional views illustrating a method of manufacturing a color filter display panel according to an exemplary embodiment of the present invention, in the order of their processes.                     

First, as illustrated in FIG. 5A, a material having excellent light blocking characteristics, for example, chromium, is deposited on the substrate 210, and the light blocking member 220 is formed by a photolithography process.

Then, a photosensitive resin including one of red, green, and blue pigments is applied by a spin coating method. After exposing and developing the photosensitive resin, the resin is hard baked to form a color filter 230, and is repeatedly performed according to each color to form a red, green, and blue filter 230. FIG.

Next, as shown in FIG. 5B, an overcoat 250 is formed by coating a photosensitive organic material that is easily planarized on the substrate 210. Then, the overcoat 250 is exposed and developed using the photomask MP having the slit pattern S. Then, the photoresist film for color filters is exposed and developed using the photomask to form the first thickness portion A and The second thickness portion B is formed. Since the second thickness portion B is thinner than the first thickness portion A, the second thickness portion B is formed in the shape of the groove H in the overcoat 250. The diameter of the groove (H) is formed in the range of 10 ~ 20um, the depth of the groove (H) is such that the size of the spacer does not float, depending on the size of the spacer, but preferably formed in the range of 0.5 ~ 1.5um Do.

For example, a method of varying the thickness of the color filter according to the position may include a translucent area as well as a transparent area and a light blocking area in the photomask. The translucent region is provided with a slit pattern, a lattice pattern, or a thin film having a medium transmittance or a medium thickness.

When using the optical mask MP having the slit pattern S as in the embodiment of the present invention, it is preferable that the width of the slit or the interval between the slits is smaller than the resolution of the exposure machine used for the photographing process. Another example is to use a photoresist film that can be reflowed. That is, a thin portion is formed by forming a reflowable photoresist pattern with a normal mask having only a transparent region and a light shielding region and then reflowing so that the photoresist film flows into an area where no photoresist remains.

Next, as shown in FIG. 4, the common electrode 270 is formed by depositing ITO, IZO, or the like on the substrate 210 by a sputtering method.

Then, the spacer spacer 320 is distributed on the common electrode 270. The spacer 320 is selectively dispersed to be located only in the groove H of the overcoat 250. As a method of distributing the bead-shaped spacer 320, an ink-jet method or a roll printing method may be used.

As described above, the phenomenon in which the bead spacer is suspended by forming a groove in the overcoat and confining the bead spacer in the groove is prevented.

Therefore, a phenomenon such as light leakage due to the floating of the bead spacer does not occur, it is possible to provide a high-quality liquid crystal display device.

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 (6)

Insulation board, A color filter formed on the insulating substrate, An overcoat formed on the color filter and having a groove; And a common electrode formed on the overcoat and formed along the inside of the groove. In claim 1, And a light blocking pattern formed on the insulating substrate and having a plurality of openings. In claim 2, And the color filter has red, green, and blue filters and is formed in the opening. A thin film transistor array panel including a first insulating substrate, a gate line and a data line insulated from and intersecting on the first insulating substrate, a thin film transistor connected to the gate line and the data line, and a pixel electrode connected to the thin film transistor; A color filter formed on a second insulating substrate, the second insulating substrate and facing the thin film transistor array panel, an overcoat formed on the color filter and having a groove, and formed on the overcoat and formed along the groove. Color filter panel comprising a common electrode, A liquid crystal filled between the thin film transistor array panel and the color filter panel; And a bead-shaped spacer corresponding to the groove and maintaining a predetermined gap between the thin film transistor array panel and the color filter display panel. In claim 4, And a light shielding pattern formed on the second insulating substrate and formed to correspond to the gate line and the data line. In claim 4, And the groove is formed at a position corresponding to a portion where the gate line and the data line overlap.

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