KR20060089834A - Color filter array panel and liquid crystal display including the same - Google Patents

Abstract

The color filter display panel of the present invention includes an insulating substrate, a light shielding pattern formed on an insulating substrate and having a plurality of openings, a plurality of color filters formed on the openings, and a common electrode formed on the color filter. In addition, the color filter is formed thicker than the light shielding pattern, and the thickness of the color filter is substantially uniform.

LCD, ITO, Transmittance, Color Filter

Description

COLOR FILTER ARRAY PANEL AND LIQUID CRYSTAL DISPLAY INCLUDING THE SAME}

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.

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.

5A and 5B are cross-sectional views illustrating a method of manufacturing a color filter display panel according to an 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 shading pattern

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

310: sealing material 320: spacer

The present invention relates to a color filter display panel and a liquid crystal display device including the same.

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.

The liquid crystal molecules of the liquid crystal layer change their orientation according to the electric field generated in the liquid crystal layer due to the voltage applied to the field generating electrode, and thus the polarization of the light passing through the liquid crystal layer changes, and the polarizing plate emits the light polarization. Convert to transmittance of. Accordingly, the liquid crystal display may display a desired image by adjusting the voltage applied to the field generating electrode. In this case, the transmittance of light is determined by phase retardation caused by birefringence of the liquid crystal layer, and the phase retardation is a product of the refractive anisotropy of the liquid crystal layer and the distance between the two display panels. Given by

Among the liquid crystal display devices, one of the two display panels currently used includes a plurality of pixel electrodes, which are a kind of field generating electrodes, and a thin film transistor (TFT) for switching a voltage applied to the pixel electrodes. The other is a liquid crystal display provided with a common electrode and a color filter, which are different types of field generating electrodes.

In the liquid crystal display, a light blocking pattern is formed on a display panel including a color filter to separate pixels and prevent light leakage between the pixels.

The light shielding pattern is formed of chromium or chromium oxide. However, in order to improve process convenience and C / R, a light shielding pattern using an organic material has been developed.

However, when the light shielding pattern is formed of an organic material, the thickness of the light shielding pattern is thicker than that of the light shielding pattern formed of chromium, and thus, C / R worsens and light leakage occurs. In order to solve this problem, an overcoat must be formed on the substrate, but a process for forming the overcoat is added, thereby decreasing yield and increasing production cost.

Therefore, the technical problem of the present invention is to provide a color filter display panel, a manufacturing method thereof, and a liquid crystal display including the same, in which light leakage does not occur without further forming an overcoat.

In order to achieve the above object, the color filter display panel of the present invention is formed on an insulating substrate, an insulating substrate and has a plurality of openings, a light shielding pattern formed of an organic material, a plurality of color filters formed on the openings, and a color filter. It includes a common electrode formed, the color filter is formed thicker than the light shielding pattern, and the thickness of the color filter is substantially uniform.

And it is preferable that the color filter is formed in thickness more than 3.0 micrometers.

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

In addition, it is preferable that the light shielding pattern is hydrophobic and the contact angle with deionized water is 50 degrees or more.

According to another aspect of the present invention, there is provided a liquid crystal display device including a plurality of thin film transistors connected to a first insulating substrate, a plurality of gate lines and data lines insulated and intersecting on the first insulating substrate, A thin film transistor array panel including a pixel electrode connected to each of the thin film transistors, a second insulating substrate facing the thin film transistor array panel, an organic light shielding pattern formed on the second insulating substrate, and having a plurality of openings; A plurality of color filters, 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, wherein the color filter is formed thicker than the light shielding pattern and is substantially colored The thickness of the filter is uniform.

It is preferable that the color filter is formed in thickness of 3.0 micrometers or more here.

Each color filter preferably displays one of red, green, and blue.

In addition, it is preferable that the light shielding pattern is hydrophobic and the contact angle with deionized water is 50 degrees or more.

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 color filter display panel and a liquid crystal display including the same 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. 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, wherein 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 is made of an organic material including a black pigment and has a thickness of about 1.2 μm.

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.

As shown in FIGS. 2 and 3, the color filters 230R, 230G, and 230B are sufficiently thick to have a thickness of 3.0 μm or more so as to be flat without being affected by the thickness of the lower light blocking pattern 220. Preferably it is formed in thickness of 3.5 micrometers or more.

On the color filters 230R, 230G, 230B, and the light blocking member 220, a common electrode 270 made of a transparent conductor such as indium tin oxide (ITO) or indium zinc oxide (IZO) is formed on the light blocking member 220. Formed.

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 light blocking pattern 220. 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.

As such, when the thickness of the color filters 230R, 230G, and 230B is sufficiently thick or the shading pattern 220 is formed to have a high hydrophobicity, the color filter is formed flat, so that a separate overcoat is not required even if the shading pattern is formed of an organic material. C / R is not reduced or light leakage is not increased.

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 and 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 embodiment of the present invention, in the order of their processes.

First, as shown in FIG. 5A, the light blocking member 220 is formed by applying a photosensitive resin including a black pigment on the substrate 210 and patterning the same. At this time, the photosensitive resin is formed to a thickness of about 1.2㎛, the hydrophobic contact angle with the deionized water (Dionized water, DI) is 50 ° or more, preferably 60 ° or more.

Then, as shown in Fig. 5b, a photosensitive resin containing a green pigment is applied by a spin coating method or the like. The photosensitive resin is exposed and developed, and then hard baked to form a green filter 230G. At this time, the light shielding pattern 220 is strongly hydrophobic and the contactability of the photosensitive resin is not good, and the photosensitive resin on the light shielding pattern 220 tries to flow down to the opening. Therefore, since the green filter remaining on the light blocking pattern 220 is formed thinner than the green filter positioned in the opening, the entire surface of the substrate is flat.

Alternatively, the photosensitive resin may be formed thick enough to have a thickness of 3.0 μm or more so as to be flat without being affected by the thickness of the light shielding pattern 220. Preferably it is formed in thickness of 3.5 micrometers or more.

Next, the blue and red filters 230B and 230R are formed in the same manner as the green filter 230G. These formation orders can be reversed. Next, as shown in FIGS. 2 and 3, the common electrode 270 is formed by depositing ITO, IZO, or the like on the substrate 210 by a sputtering method.

Thereafter, a column spacer (not shown) and an alignment layer (not shown) are formed on the common electrode 270.

As described above, the present invention improves productivity by simplifying the manufacturing process of the color filter display panel by increasing the thickness of the color filter so as not to form a separate cover film.

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 (8)

Insulation board, A light shielding pattern formed on the insulating substrate and having a plurality of openings and formed of an organic material; A plurality of color filters formed in the openings; A common electrode formed on the color filter; The color filter is formed thicker than the light shielding pattern, and the thickness of the color filter is uniform. In claim 1, And the color filter is formed to a thickness of 3.0 µm or more. In claim 1, Wherein each of the color filters displays one of red, green, and blue. In claim 1, The light blocking pattern is hydrophobic and has a contact angle with deionized water of 50 ° or more. A first insulating substrate, a plurality of gate lines and data lines insulated from and intersecting on the first insulating substrate, a plurality of thin film transistors connected to the gate lines and data lines, and a pixel electrode connected to each of the thin film transistors. Thin film transistor display panel, A second insulating substrate facing the thin film transistor array panel, an organic light shielding pattern formed on the second insulating substrate, and having a plurality of openings, a plurality of color filters formed in the openings, and a common electrode formed on the color filter Color filter display panel, including A liquid crystal filled between the thin film transistor array panel and the color filter panel; The color filter is formed thicker than the light blocking pattern, and the thickness of the color filter is uniform. In claim 5, The color filter is a liquid crystal display device formed to a thickness of 3.0㎛ or more. In claim 5, Wherein each of the color filters displays one of red, green, and blue. In claim 5, The light blocking pattern is hydrophobic and has a contact angle with deionized water of 50 ° or more.

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