DISPLAY PANEL AND METHOD OF MANUFACTURING THE SAME

• US 20080088788A1
• Filed: 10/10/2007
• Published: 04/17/2008
• Est. Priority Date: 10/12/2006
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Byung-Hyun, LEE, Yun-Seok, CHO, Young-Je, MAENG, Cheon-Jae
• Granted Patent: US 7,742,116 B2
• Time in Patent Office: Days
• US Class Current: 349/160
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/1341 Filling or closing of cells
• CPC Class Codes: G02F 1/134318 having a patterned common electrode
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode

Abstract

A display panel and a method of manufacturing the same in which a storage electrode is formed on a first base substrate, and an insulating layer is formed on the first base substrate to cover the storage electrode. The insulating layer is recessed directly above the storage electrode. A pixel electrode faces the storage electrode and is formed on the insulating layer. A protruding portion is formed on a second base substrate facing the first base substrate. The protruding portion protrudes toward a concaved portion of the insulating layer.

Claims

1. A display panel, comprising:

an array substrate comprising;

a first base substrate comprising a plurality of pixel areas;

a storage electrode arranged in each pixel area of the first base substrate;

an insulating layer arranged on the first base substrate to cover the storage electrode, the insulating layer comprising a concave portion directly above the storage electrode; and

a pixel electrode arranged on the insulating layer and facing the storage electrode;

an opposite substrate comprising;

a second base substrate facing the first base substrate; and

a protruding portion arranged on the second base substrate at a position corresponding to the storage electrode and protruded toward the first base substrate; and

a liquid crystal layer interposed between the array substrate and the opposite substrate.

2. The display panel of claim 1, wherein the opposite substrate further comprises a first black matrix arranged on the second base substrate at a position corresponding to a peripheral area adjacent to the pixel areas.

3. The display panel of claim 2, wherein the protruding portion comprises a second black matrix, the second black matrix comprising the same material as that of the first black matrix.

4. The display panel of claim 3, wherein the opposite substrate further comprises a color filter layer comprising color filters corresponding to the pixel areas, respectively, and the color filters cover the second black matrix.

5. The display panel of claim 4, wherein the protruding portion further comprises a dummy color filter arranged between the second black matrix and one color filter among the color filters arranged above the second black matrix, the dummy color filter having the same color as that of at least one color filter of the color filters that are adjacent to the one color filter.

6. The display panel of claim 1, wherein the opposite substrate further comprises a color filter layer comprising color filters corresponding to the pixel areas, respectively.

7. The display panel of claim 6, wherein the protruding portion comprises a first dummy color filter arranged between a corresponding color filter among the color filters and the second base substrate, and the first dummy color filter has the same color as that of one of the color filters that are adjacent to the corresponding color filter.

8. The display panel of claim 7, wherein the protruding portion further comprises a second dummy color filter arranged on the corresponding color filter, the second dummy color filter having the same color as that of one color filter of the adjacent color filters and different from that of the first dummy color filter.

9. The display panel of claim 6, wherein the opposite substrate further comprises:

a common electrode arranged on the color filter layer; and

a gap maintaining pattern arranged between the array substrate and the opposite substrate to maintain a gap between the array substrate and the opposite substrate.

10. The display panel of claim 9, wherein the protruding portion comprises a dummy gap maintaining pattern arranged on the common electrode, the dummy gap maintaining pattern comprising the same material as that of the gap maintaining pattern.

11. The display panel of claim 1, wherein a height of the protruding portion is equal to or less than a depth of the concave portion of the insulating layer.

12. The display panel of claim 1, wherein the insulating layer comprises:

a gate insulating layer covering the storage electrode;

a passivation layer arranged on the gate insulating layer; and

an organic insulating layer arranged on the passivation layer, the organic insulating layer comprising the concave portion.

13. The display panel of claim 1, wherein the pixel electrode comprises:

a first sub pixel electrode to receive a first pixel voltage; and

a second sub pixel electrode to receive a second pixel voltage, the second pixel voltage being smaller than the first pixel voltage.

14. The display panel of claim 13, wherein the pixel electrode comprises a plurality of first openings formed therethrough to electrically separate the first sub pixel electrode and the second sub pixel electrode from each other and to divide each pixel area into a plurality of domains.

15. The display panel of claim 14, wherein the opposite substrate further comprises a common electrode facing the pixel electrode, the common electrode comprising a plurality of second openings formed therethrough, the second openings being arranged in different positions from those of the first openings to divide the domains.

16. The display panel of claim 13, wherein the array substrate further comprises:

a first gate line;

a second gate line spaced apart from the first gate line;

a data line crossing with and electrically insulated from the first gate line and the second gate line;

a first thin film transistor electrically coupled to the first gate line and the data line to output the first pixel voltage; and

a second thin film transistor electrically coupled to the second gate line and the data line to output the second pixel voltage.

17. The display panel of claim 16, wherein the first sub pixel electrode is electrically coupled to an output electrode of the first thin film transistor to receive the first pixel voltage, and the second sub pixel electrode is electrically coupled to an output electrode of the second thin film transistor to receive the second pixel voltage.

18. A method of manufacturing a display panel, comprising:

forming a gate electrode and a storage electrode in a pixel area of a first base substrate;

forming a gate insulating layer on the first base substrate to cover the gate electrode and the storage electrode;

forming an active pattern, an ohmic contact pattern, a source electrode, and a drain electrode on the gate insulating layer, the source electrode and the drain electrode having the same shape as that of the ohmic contact pattern;

forming an insulating layer to cover the source electrode and the drain electrode and comprising a concave portion directly above the storage electrode;

forming a pixel electrode on the insulating layer;

forming a protruding portion on a second base substrate;

coupling the first base substrate and the second base substrates to each other such that the second base substrate faces the first base substrate with the protruding portion protruding toward the storage electrode; and

interposing a liquid crystal layer between the first base substrate and the second base substrate.

19. The method of claim 18, wherein forming the protruding portion comprises:

coating a light blocking layer on the second base substrate; and

patterning the light blocking layer to form a first black matrix in an area corresponding to a peripheral area of the pixel area and a second black matrix in an area corresponding to the storage electrode.

20. The method of claim 19, further comprising forming a first color filter among color filters having different colors from each other on the second base substrate, and wherein forming the protruding portion further comprises forming a second color filter among the color filters on the first color filter, the second color filter having a different color from that of the first color filter and being formed at a position corresponding to the storage electrode.

21. The method of claim 20, further comprising forming a common electrode on the color filter and the protruding portion.