DISPLAY SUBSTRATE, METHOD FOR MANUFACTURING THE SAME AND DISPLAY APPARATUS HAVING THE SAME
A display substrate includes a base substrate, a signal line, a thin-film transistor (“TFT”), a pixel electrode, a color filter and a light-blocking part. The signal line and the TFT are formed on the base substrate. The TFT is electrically connected to the signal line. The pixel electrode is formed in a unit pixel area of the base substrate and is electrically connected to the TFT. The color filter is formed in the unit pixel area. The light-blocking part includes an organic pattern formed on the base substrate and a light-blocking pattern formed on the organic pattern. The organic pattern covers the TFT and is formed along a longitudinal axis of the signal line to define at least a portion of a periphery of the color filter. A size and a shape of the light-blocking pattern are substantially the same as a size and a shape of the organic pattern.
1 . A display substrate comprising:
a base substrate;
a signal line formed on the base substrate;
a thin-film transistor formed on the base substrate and electrically connected to the signal line;
a pixel electrode formed in a unit pixel area of the base substrate and electrically connected to the thin-film transistor;
a color filter formed in the unit pixel area; and
a light-blocking part comprising:
an organic pattern formed on the base substrate; and
a light-blocking pattern formed on the organic pattern, wherein
the organic pattern is formed along a longitudinal axis of the signal line to define at least a portion of a periphery of the color filter,
the organic pattern covers the thin-film transistor, and
a size and a shape of the light-blocking pattern are substantially the same as a size and a shape of the organic pattern.
2 . The display substrate of claim 1 , wherein the organic pattern has a hydrophilic property, and the light-blocking pattern has a hydrophobic property.
3 . The display substrate of claim 1 , wherein a thickness of the light-blocking part is approximately the same as a corresponding thickness of the color filter.
4 . The display substrate of claim 1 , wherein a thickness of the organic pattern is approximately equal to or greater than a corresponding thickness of the light-blocking pattern.
5 . The display substrate of claim 1 , further comprising an organic protective layer formed between the pixel electrode and the color filter to cover the color filter and the light-blocking part.
6 . The display substrate of claim 1 , wherein
the pixel electrode is formed on the color filter, and
the pixel electrode makes electrical contact with a drain electrode of the thin-film transistor through a contact hole formed through the light-blocking part.
7 . The display substrate of claim 1 , further comprising a plurality of the signal lines, wherein signal lines of the plurality of the signal lines comprise:
a gate line formed along a first direction and electrically connected to a gate electrode of the thin-film transistor; and
a data line formed along a second direction, substantially perpendicular to the first direction, and electrically connected to a source electrode of the thin-film transistor.
8 . The display substrate of claim 7 , wherein the data line comprises:
a first data line which provides a first data voltage having a first level to the pixel electrode; and
a second data line disposed adjacent to the first data line and which provides a second data voltage having a second level to the pixel electrode, wherein the second level is less than the first level.
9 . The display substrate of claim 8 , wherein
the light-blocking part is disposed between the first data line and the second data line, and
the light-blocking part at overlaps at least a portion of the first data line and the second data line.
10 . A method for manufacturing a display substrate, the method comprising:
forming a signal line and a thin-film transistor electrically connected to the signal line on a base substrate;
forming a light-blocking part on the base substrate, the light-blocking part including an organic pattern and a light-blocking pattern;
forming a color filter in a unit pixel area of the base substrate in which the light-blocking part is not formed; and
forming a pixel electrode, electrically connected to the thin-film transistor, on the color filter, wherein
the organic pattern is formed along a longitudinal axis of the signal line and defines at least a portion of a periphery of the color filter,
the organic pattern covers the thin-film transistor,
the light-blocking pattern is formed on the organic pattern, and
a size and a shape of the light-blocking pattern are substantially the same as a size and a shape of the organic pattern.
11 . The method of claim 10 , wherein the forming the light-blocking part comprises:
sequentially forming an organic photosensitive film and a light-blocking photosensitive film on the base substrate to cover the signal line and the thin-film transistor; and
forming the organic pattern and the light-blocking pattern by patterning the organic photosensitive film and the light-blocking photosensitive film using a photolithography process.
12 . The method of claim 11 , wherein the sequentially forming the organic photosensitive film and the light-blocking photosensitive film comprise:
attaching a dry film to the base substrate, the dry film including a base film having the light-blocking photosensitive film and the organic photosensitive film sequentially formed thereon; and
removing the base film from the light-blocking photosensitive film and the organic photosensitive film.
13 . The method of claim 12 , wherein the attaching the dry film to the base substrate comprises:
aligning the dry film on the base substrate; and
attaching the organic photosensitive film and the light-blocking photosensitive film on the base substrate by at least one of pressing and heating the dry film.
14 . The method of claim 11 , wherein the organic photosensitive film and the light-blocking photosensitive film comprise a same type of photo resist.
15 . The method of claim 14 , wherein the organic photosensitive film and the light-blocking photosensitive film comprise a negative type photo resist.
16 . The method of claim 10 , wherein the forming the color filter comprises:
jetting a color filter ink on the unit pixel area of the base substrate; and
drying the color filter ink to form the color filter.
17 . The method of claim 16 , wherein
the organic pattern has a hydrophilic property to have a first affinity for the color filter ink,
the light-blocking pattern has a hydrophobic property to have a second affinity for the color filter ink, and
the first affinity for the color filter ink is greater than the second affinity for the second color filter ink.
18 . The method of claim 16 , wherein a thickness of the color filter is approximately the same as a corresponding thickness of the light-blocking part.
19 . A display apparatus comprising:
a first substrate;
a second substrate facing the first substrate; and
a liquid crystal layer disposed between the first substrate and the second substrate, wherein the first substrate comprises:
a base substrate;
a signal line formed on the base substrate;
a thin-film transistor formed on the base substrate and electrically connected to the signal line;
a pixel electrode formed in a unit pixel area of the base substrate and electrically connected to the thin-film transistor;
a color filter formed in the unit pixel area; and
a light-blocking part including an organic pattern formed on the base substrate and a light-blocking pattern formed on the organic pattern, wherein
the organic pattern is formed along a longitudinal axis of the signal line to define at least a portion of a periphery of the color filter,
the organic pattern covers the thin-film transistor, and
a size and a shape of the light-blocking pattern are substantially the same as a size and a shape of the organic pattern.
20 . The display apparatus of claim 19 , wherein the second substrate comprises:
a counter substrate disposed on the second substrate; and
a common electrode formed on a surface of the counter substrate which faces the first substrate.