KR20100081504A - Llquid crystal display - Google Patents

Abstract

PURPOSE: A liquid crystal display for reducing the height difference of a color filter and a central part within pixel and an edge is provided to easily move the dropped color filter by an inkjet type by forming a projection member. CONSTITUTION: A liquid crystal display includes a substrate, a partition wall(360), a protrusion member(361) and a color filter. The partition wall is formed on the substrate. The partition wall divides a pixel. The boss member is formed on the substrate as the partition wall. The protrusion member is formed within a partitioned pixel. The color filter is filled with the divided pixel. The height of the protrusion member is reduced from the center part.

Description

Liquid crystal display device {LlQUID CRYSTAL DISPLAY}

The present invention relates to a liquid crystal display device.

The liquid crystal display is one of the most widely used flat panel display devices. The liquid crystal display includes two display panels on which electrodes are formed and a liquid crystal layer interposed therebetween to rearrange the liquid crystal molecules of the liquid crystal layer by applying a voltage to the electrode. The display device controls the amount of light transmitted.

In addition, the liquid crystal display includes a color filter that displays color using light transmitted through the liquid crystal layer. Since the color filter usually includes red, green, and blue, when the two display panels are combined, they should be well aligned so that the color corresponding to each pixel faces each other. However, since the light blocking member between the pixels needs to be formed wide in consideration of the alignment error between the two display panels, there is a problem that the opening is narrowed and the aperture ratio is reduced accordingly.

To solve this problem, a technique for forming a color filter using the inkjet method has been proposed. When the color filter is formed by the inkjet method, there is an advantage that the manufacturing process is simplified because no exposure machine is used.

However, since the inkjet method uses liquid ink, there is a problem in that the thickness of the edge and the thickness of the center part are different in the color filter of one pixel due to the characteristics of the liquid.

The problem to be solved by the present invention is to reduce the difference in the height of the color filter in the center and the edge portion in the pixel.

The liquid crystal display according to the exemplary embodiment of the present invention includes a substrate, a partition formed on the substrate and partitioning pixels, a projection member formed on a substrate formed on the substrate and partitioned by the partition, and filled in a pixel partitioned by the partition. It includes a color filter, the projection member is lowered in height toward the partition wall from the central portion.

The center portion of the protrusion member may be positioned at the center of the pixel, and the height of the center portion of the protrusion member may be lower than the height of the partition wall.

The protruding member may be formed on the same layer as the partition wall.

The protruding member may be formed of a transparent organic film material.

A liquid crystal display according to another exemplary embodiment of the present invention is formed on a substrate, a gate line and a data line formed on the substrate, a gator line, and a thin film transistor, a gate line, a data line, and a thin film transistor connected to the data line. And a partition wall partitioning the pixel, a projection member formed in the pixel partitioned by the partition wall, and a color filter filled in the pixel partitioned by the partition wall, wherein the projection member is lowered toward the partition wall from the center portion.

According to the exemplary embodiment of the present invention, a color pyramid-shaped transparent projection member is formed in the pixel partitioned by the partition wall, the height of which is lowered toward the partition wall from the center portion, so that the color filter dropped by the inkjet method is moved toward the corner of the pixel. It can be easily moved to reduce the height difference of the color filter between the center portion and the edge portion in the pixel.

DETAILED DESCRIPTION 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. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

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, film, region, plate, etc. is said to be "on" another part, this includes not only the other part being "right 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 liquid crystal display according to an exemplary embodiment of the present invention will be described in more detail with reference to FIGS. 1 and 2.

FIG. 1 is a layout diagram showing a liquid crystal display device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line II-II in FIG.

1 and 2, the liquid crystal display according to the exemplary embodiment includes a display panel 100 and a partition wall 360 formed on the display panel 100.

The display panel 100 may be a thin film transistor display panel on which a thin film transistor is formed, or may be a common electrode display panel on which a common electrode is formed.

A partition wall 360 defining a pixel is formed on the display panel 100. The partition wall 360 may be formed of a transparent organic material, and the partition wall 360 is formed in the same pattern as the gate line and the date line to partition the pixel.

The protrusion member 361 is formed on the same layer as the partition wall 360, and the protrusion member 361 may be formed of a transparent organic material, and thus does not affect the transmittance.

The protruding member 361 is formed inside the pixel partitioned by the partition wall 360, and has a square pyramid shape that decreases in height from the center portion toward the partition wall 360. The central portion of the projection member 361 is located at the center of the pixel. The height of the center portion of the protrusion member 361 is preferably lower than the height of the partition wall 360.

The color filter 230 is formed on the protrusion member 230.

The color filter 230 dropped inside the pixel by the inkjet method is moved in the corner direction of the pixel by the projection member 361. That is, the color filter 230 which is separated from the center part of the pixel may be easily moved in the corner direction of the pixel due to the inclination of the protrusion member 361 located in the center part of the pixel. Therefore, the difference between the thickness of the color filter 230 in the center portion and the corner portion of the pixel is reduced.

3 is a layout view of a liquid crystal display according to another exemplary embodiment. FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 3, and FIG. 5 is a cross-sectional view taken along the line V-V of FIG. 3.

3 to 5, a liquid crystal display according to another exemplary embodiment of the present invention includes a lower panel 100 and an upper panel 200 facing each other and between the two display panels 100 and 200. The liquid crystal layer 3 is included.

First, the lower panel 100 will be described.

A plurality of gate lines 121 and a plurality of sustain electrode lines 131 and 135 are formed on an insulating substrate 110. The gate line 121 transmits a gate signal and mainly extends in a horizontal direction. Each gate line 121 includes a plurality of first and second gate electrodes 124a and 124b protruding upward. The storage electrode lines 131 and 135 include a stem line 131 extending substantially in parallel with the gate line 121 and a plurality of storage electrodes 135 extending therefrom. The shape and arrangement of the storage electrode lines 131 and 135 may be modified in various forms.

A gate insulating layer 140 is formed on the gate line 121 and the storage electrode lines 131 and 135, and a plurality of semiconductors 154a and 154b made of amorphous or crystalline silicon are formed on the gate insulating layer 140.

A plurality of pairs of ohmic contacts 161a, 161b, 163a, 163b, 165a, and 165b are formed on the semiconductors 154a and 154b, respectively.

A plurality of pairs of data lines 171a and 171b and a plurality of pairs of first and second drain electrodes 175a and 175b are disposed on the ohmic contacts 161a, 161b, 163a, 163b, 165a and 165b and the gate insulating layer 140. Formed.

The data lines 171a and 171b transmit data signals and mainly extend in a vertical direction to intersect the gate lines 121 and the stem lines 131 of the storage electrode lines. The data lines 171a and 171b include first and second source electrodes 173a and 173b extending toward the first and second gate electrodes 124a and 124b and bent in a U-shape, and the first and second source electrodes. 173a and 173b face the first and second drain electrodes 175a and 175b around the first and second gate electrodes 124a and 124b, respectively.

The first and second drain electrodes 175a and 175b extend upward from one end partially surrounded by the first source electrode 173a, and the other end may have a large area for connection with another layer. However, the shape and arrangement of the data lines 171a and 171b including the first and second drain electrodes 175a and 175b may be modified in various forms.

The first and second gate electrodes 124a and 124b, the first and second source electrodes 173a and 173b, and the first and second drain electrodes 175a and 175b are formed of the first and second semiconductors 154a and 154b. The first and second thin film transistors TFTs Qa and Qb are formed together, and the channels of the first and second thin film transistors Qa and Qb are first and second source electrodes 173a and 173b. And first and second semiconductors 154a and 154b between the first and second drain electrodes 175a and 175b.

The ohmic contacts 161a, 161b, 163a, 163b, 165a, and 165b exist only between the semiconductors 154a and 154b below and the data lines 171a and 171b and the drain electrodes 175a and 175b thereunder. Lowers contact resistance between The semiconductors 154a and 154b have portions exposed between the source electrodes 173a and 173b and the drain electrodes 175a and 175b and not covered by the data lines 171a and 171b and the drain electrodes 175a and 175b.

A lower passivation layer 180p made of silicon nitride or silicon oxide is formed on the data lines 171a and 171b, the drain electrodes 175a and 175b, and the exposed semiconductors 154a and 154b.

The partition wall 360 is formed on the lower passivation layer 180p. The partition wall 360 may be formed of a transparent organic material, and the partition wall 360 is formed along the gate line 121 and the data lines 171a and 171b and is also formed on the thin film transistor. The area surrounded by the partition wall 360 has a substantially rectangular shape with a filling area filled with the color filter 230 and the upper passivation layer 180q.

The protrusion member 361 is formed on the same layer as the partition wall 360, and the protrusion member 361 may be formed of a transparent organic material, and thus does not affect the transmittance.

The protruding member 361 is formed inside the pixel partitioned by the partition wall 360, and has a square pyramid shape that decreases in height from the center portion toward the partition wall 360. The central portion of the projection member 361 is located at the center of the pixel. The height of the center portion of the protrusion member 361 is preferably lower than the height of the partition wall 360.

The color filter 230 is formed on the protrusion member 230.

The color filter 230 dropped inside the pixel by the inkjet method is moved in the corner direction of the pixel by the projection member 361. That is, the color filter 230 which is separated from the center part of the pixel may be easily moved in the corner direction of the pixel due to the inclination of the protrusion member 361 located in the center part of the pixel. Therefore, the difference between the thickness of the color filter 230 in the center portion and the corner portion of the pixel is reduced.

An upper passivation layer 180q is formed on the color filter 230. The upper passivation layer 180q may protect the color filter 230 and planarize the substrate 100. The lower passivation layer 180p may prevent the pigment of the color filter 230 from entering the exposed portions of the semiconductors 154a and 154b.

The upper passivation layer 180q may be formed of an organic material having photosensitivity. In addition, the upper passivation layer 180q may be formed to be 1.0 μm or more in order to reduce the coupling phenomenon between the pixel electrode 191 and the data lines 171a and 171b and to planarize the substrate.

A plurality of contact holes 185a and 185b exposing the first and second drain electrodes 175a and 175b are formed in the upper passivation layer 180q, the color filter 230, and the lower passivation layer 180p.

A plurality of pixel electrodes 191 are formed on the upper passivation layer 180q, and a lower alignment layer 11 is formed on the pixel electrode 191.

Each pixel electrode 191 includes first and second subpixel electrodes 191a and 191b separated from each other with a gap 91 therebetween.

The area occupied by the second subpixel electrode 191b in the entire pixel electrode 191 may be larger than the area occupied by the first subpixel electrode 191a, wherein the second subpixel electrode 191b is the first subpixel. It is formed to be 1.0 to 2.2 times larger than the area of the electrode 191a.

The second subpixel electrode 191b includes a pair of branches 195 extending along the data line 171. The branch is positioned between the first subpixel electrode 191b and the data line 171 and is connected to a lower end of the first subpixel electrode 191b. One of the branches is extended and is physically and electrically connected to the second drain electrode 175b through the contact hole 185b. The first subpixel electrode 191a is connected to the first drain electrode 175a through the contact hole 185a.

The first and second subpixel electrodes 191a and 191b receive a data voltage from the first and second drain electrodes 175a and 175b.

Next, the upper panel 200 will be described.

In the upper panel 200, the common electrode 270 is formed on the entire surface of the transparent insulating substrate 210, and the upper alignment layer 21 is formed on the common electrode 270.

Although not shown, a separate light blocking member may be formed on the substrate 210. A separate light blocking member may be formed on the lower substrate 110. The spacer 363 is used to maintain a gap between the upper panel 200 and the lower panel 100.

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.

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

4 is a cross-sectional view taken along the line IV-IV of FIG. 3.

5 is a cross-sectional view taken along the line VV of FIG. 3.

<Explanation of symbols for the main parts of the drawings>

121: gate line 171: data line

230: color filter 360: partition wall

361: projection member

Claims (8)

Board, Barrier ribs formed on the substrate and partitioning pixels; A projection member formed on the substrate with the same material as the partition wall and formed in a pixel partitioned by the partition wall; A color filter filled in the pixel partitioned by the partition wall, The protrusion member may have a height that decreases from the center portion toward the partition wall. In claim 1, And a center portion of the protrusion member is positioned at the center of the pixel, and a height of the center portion of the protrusion member is lower than a height of the partition wall. In claim 2, The projection member is formed on the same layer as the partition wall. 4. The method of claim 3, The projection member is a liquid crystal display device formed of a transparent organic film material. Board, A gate line and a data line formed on the substrate; A thin film transistor connected to the gator line and the data line, Barrier ribs formed on the gate line, the data line, and the thin film transistor to partition pixels; A projection member formed of the same material as the partition wall in a pixel partitioned by the partition wall; A color filter filled in the pixel partitioned by the partition wall, The protrusion member may have a height that decreases from the center portion toward the partition wall. In claim 5, And a center portion of the protrusion member is positioned at the center of the pixel, and a height of the center portion of the protrusion member is lower than a height of the partition wall. In claim 6, The projection member is formed on the same layer as the partition wall. In claim 7, The projection member is formed of a transparent organic film material.

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