DISPLAY SUBSTRATE, METHOD OF MANUFACTURING THE SAME AND DISPLAY PANEL HAVING THE SAME

• US 20070097278A1
• Filed: 11/03/2006
• Published: 05/03/2007
• Est. Priority Date: 11/03/2005
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: PAK, Sang-Jin, RHO, Soo-Guy, JEON, Jin, LEE, Ji-Eun
• Application Number:
  US11/556,297
• Publication Number:
  US 20070097278A1
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/13396 Spacers having different sizes
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires

Abstract

A display substrate reducing a cost price and produced conveniently by a simple process includes a base substrate, a supporting pattern, and a first and a second protrusion pattern. The display substrate has a touch screen function detecting a touch point and electrically connected at the touch point to an array substrate having a plurality of pixel portions, and first and second signal lines formed thereon. The supporting pattern is formed on a base substrate with a first length, and maintains a separation distance from the array substrate. The first and second protrusion patterns are formed on the base substrate with a second length, and electrically connected to the first and second signal lines respectively. The protrusion pattern and the supporting pattern are simultaneously formed, and thus the manufacturing process can be simplified.

Claims

1. A display substrate of a display panel having a touch screen function detecting a coordinate of a touch point, the display substrate electrically connected to an array substrate at the touch point, the array substrate having a plurality of pixel portions, a first line and a second line formed thereon, the plurality of pixel portions defined by a plurality of gate lines and a plurality of data lines, the first and second lines detecting the touch point, the display substrate comprising:

a base substrate;

a supporting pattern directly formed on the base substrate with a first length, the supporting pattern maintaining a uniform separation distance from the array substrate; and

a first protrusion pattern and a second protrusion pattern directly formed on the base substrate with a second length, the first and second protrusion patterns electrically connected to the first and second lines respectively in the touch point.

2. The display substrate of claim 1, wherein the first length is longer than the second length.

3. The display substrate of claim 2, wherein the first and second protrusion patterns have a conductive layer formed thereon.

4. The display substrate of claim 3, wherein the first and second protrusion patterns are separated from each other by a predetermined distance.

5. The display substrate of claim 3, wherein the first and second protrusion patterns are formed adjacent to each other.

6. The display substrate of claim 3, further comprising a light-blocking layer formed on the base substrate, the light-blocking layer defining the base substrate into areas corresponding to the plurality of pixel portions, wherein the supporting pattern, and the first and second protrusion patterns are formed on the light-blocking layer.

7. The display substrate of claim 1, wherein the first and second protrusion patterns have a conductive layer formed thereon.

8. The display substrate of claim 7, further comprising a light-blocking layer formed on the base substrate, the light-blocking layer defining areas corresponding to the plurality of pixel portions, wherein the supporting pattern and the first and second protrusion patterns are formed on the light-blocking layer.

9. The display substrate of claim 1, wherein the supporting pattern and the first and second protrusion patterns are formed through a single exposure process.

10. A method for manufacturing a display substrate of a display panel having a touch screen function detecting a coordinate of a touch point, the display substrate electrically connected to an array substrate at the touch point, the array substrate having a plurality of pixel portions, a first line and a second line formed thereon, the plurality of pixel portions defined by a plurality of gate lines and a plurality of data lines, the first and second lines detecting the touch point, the method comprising:

coating an organic material layer on the base substrate;

disposing an exposure mask over an upper portion of the organic material layer such that the exposure mask is separated from the organic material layer, the exposure mask including a first mask pattern to form a supporting pattern, and a second mask pattern to form a first protrusion pattern and a second protrusion pattern;

exposing the organic material layer, while maintaining a separation distance between the exposure mask and the organic material layer uniformly; and

developing exposed organic material layer to form the supporting pattern and the first and second protrusion patterns.

11. The method of claim 10, further comprising forming a light-blocking layer on the base substrate, the light-blocking layer corresponding to areas defining the plurality of pixel portions.

12. The method of claim 11, wherein maintaining the separation distance between the exposure mask and the organic material layer controls a length of the supporting pattern and the protrusion patterns.

13. The method of claim 10, further comprising:

eliminating the organic material layer not corresponding to the supporting pattern and the first and second protrusion patterns;

forming a color filter layer;

forming a conductive layer on the base substrate having the color filter layer formed thereon;

patterning the conductive layer; and

eliminating the conductive layer in an area corresponding to the supporting element.

14. The method of claim 13, wherein forming the color filter layer includes using a spin coating process.

15. The method of claim 10, wherein the supporting pattern and the first and second protrusion patterns are formed by a proximity type exposure process.

16. A method for manufacturing a display substrate corresponding to an array substrate having a plurality of pixel portions and signal lines formed thereon, the plurality of pixel portions defined by a plurality of gate lines and a plurality of data lines, the signal lines detecting a touch point, the method comprising:

forming color filter patterns corresponding to the pixel portions on a base substrate;

forming an organic material layer on the base substrate having the color filter patterns formed thereon;

patterning the organic material layer, and forming a supporting pattern and a protrusion pattern having a different diameter, respectively;

forming a transparent electrode layer on the base substrate having the protrusion pattern formed thereon to form a protrusion electrode covering the protrusion pattern; and

forming the supporting pattern and the protrusion pattern having a different height from each other through a hot press process on the base substrate having the transparent electrode layer formed thereon.

17. The method of claim 16, wherein a diameter of the supporting pattern is larger than that of the protrusion pattern, and a height of the supporting pattern is substantially same as that of the protrusion pattern prior to the hot press process.

18. The method of claim 16, wherein the array substrate and the display substrate are combined using a sealant through the hot press process.

19. The method of claim 16, wherein the height of the protrusion pattern is lower than that of the supporting pattern after the hot press process.

20. The method of claim 16, wherein the supporting pattern maintains a gap between the array substrate and the display substrate, and wherein the protrusion electrode is electrically connected to the signal lines upon application of an external touch force.

21. A method for manufacturing a display substrate having a plurality of pixel portions, switching elements and signal lines formed thereon, the plurality of pixel portions defined by a plurality of gate lines and a plurality of data lines, a switching element formed on each pixel portion, the signal lines detecting a touch point, the method comprising:

forming an organic material layer on a base substrate having the switching elements formed thereon;

patterning the organic material layer to form a supporting pattern and a protrusion pattern having a different diameter respectively;

forming a transparent electrode layer on the base substrate having the supporting pattern and the protrusion pattern formed thereon;

patterning the transparent electrode layer to form a protrusion electrode covering the protrusion pattern and a pixel electrode electrically connected to the switching element; and

forming the supporting pattern and the protrusion pattern having a different height from each other through a hot press process on the base substrate having the pixel electrode formed thereon.

22. A display panel comprising:

an array substrate having a plurality of pixel portions, first signal lines and second signal lines formed thereon, the plurality of pixel portions defined by a plurality of gate lines and a plurality of data lines, the first and second signal lines detecting a touch point and formed in the same direction of the gate lines and the data lines respectively; and

an opposite substrate combined with the array substrate, and receiving a liquid crystal material,

wherein the opposite substrate comprises;

a light-blocking layer formed on a base substrate in areas corresponding to the gate lines and the data lines;

a supporting pattern directly formed on the light-blocking layer with a first length, the supporting pattern maintaining a uniform separation distance from the array substrate; and

a first protrusion pattern and a second protrusion pattern directly formed on the light-blocking layer with a second length.

23. The display panel of claim 22, wherein the first and second protrusion patterns are formed on the light-blocking layer in areas corresponding to the data lines.

24. The display panel of claim 23, wherein the first and second protrusion patterns are separated from each other by a predetermined distance.

25. The display panel of claim 23, wherein the first and second protrusion patterns are formed adjacent to each other.

26. The display panel of claim 22, wherein the first and second protrusion patterns have a conductive layer formed thereon.

27. The display panel of claim 26, wherein the array substrate further comprises a first detecting electrode and a second detecting electrode, the first and second detecting electrodes formed on the first and second signal lines respectively, and electrically connecting the first and second protrusion patterns having the conductive layer formed thereon to the first and second signal lines, respectively, at a touch point.

28. The display panel of claim 22, wherein the supporting pattern and the first and second protrusion patterns are formed by a proximity type exposure process.

29. The display panel of claim 28, wherein the first length is longer than the second length.

30. A display substrate of a display panel having a touch screen function detecting a coordinate of a touch point, the display substrate electrically connected to an opposite substrate at the touch point, the display substrate comprising:

a plurality of pixel portions defined by a plurality of gate lines extending in a first direction and a plurality of data lines extending in a second direction;

switching elements formed in the plurality of pixel portions;

first signal lines extending in the first direction;

second signal lines extending in the second direction;

a supporting pattern formed on the switching elements, the supporting pattern having a first length;

first and second protrusion patterns formed on the first and second signal lines, respectively, the first and second protrusion patterns having a second length less than the first length; and

,

first and second sensing electrodes formed on the first and second protrusion patterns, respectively, the first and second sensing electrodes electrically connected to the first and second signal lines, respectively.