TOUCH SCREEN DISPLAY HAVING TOUCH PANEL, AND METHOD OF MANUFACTURE

• US 20080055270A1
• Filed: 09/04/2007
• Published: 03/06/2008
• Est. Priority Date: 09/05/2006
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Hong, Seong-Chul, Cho, Jong-Whan
• Application Number:
  US11/849,838
• Publication Number:
  US 20080055270A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A resistive type touch panel includes an upper substrate, a lower substrate, and a porous polymer. The upper substrate has a first electrode. The lower substrate has a second electrode facing the first electrode. The porous polymer layer is disposed between the first electrode and the second electrode to increase uniformity of distance between the first electrode and the second electrode. The porous polymer layer has a plurality of openings. The first electrode and the second electrode are electrically connected to each other through the porous polymer layer when an external object makes contact with the resistive type touch panel.

Claims

1. A resistive type touch panel comprising:

an upper substrate having a first electrode;

a lower substrate having a second electrode facing the first electrode; and

a porous polymer layer disposed between the first electrode and the second electrode to increase the uniformity of distance between the first electrode and the second electrode, the porous polymer layer having a plurality of openings, the first electrode and the second electrode being electrically connected to each other through the porous polymer layer when an external object makes contact with the resistive type touch panel.

2. The resistive type touch panel of claim 1, wherein the openings are randomly formed through the porous polymer layer.

3. The resistive type touch panel of claim 1, wherein the openings are arranged in a matrix configuration and the porous polymer layer has a net shape.

4. The resistive type touch panel of claim 1, wherein the width of each of the openings ranges from about 0.1 μ

m to about 500 μ

m.

5. The resistive type touch panel of claim 1, wherein the thickness of the porous polymer layer ranges from about 0.1 μ

m to about 500 μ

m.

6. The resistive type touch panel of claim 1, further comprising a touch panel control part detecting coordinates based on coordinate signals of a contact point, the coordinate signals of the contact point being generated from the first electrode and the second electrode.

7. A resistive type screen display apparatus comprising:

a display panel part for displaying an image;

a light source part facing the display panel part and providing the display panel part with light to display the image; and

a resistive touch panel part including;

a first electrode facing the display panel part;

a second electrode facing the first electrode; and

a porous polymer layer disposed between the first electrode and the second electrode to increase uniformity of distance between the first electrode and the second electrode, the porous polymer layer having a plurality of openings, the first electrode and the second electrode being electrically connected to each other through the porous polymer layer when an external object makes contact with the resistive touch panel part.

8. The resistive type screen display apparatus of claim 7, wherein the image comprises a first image and a second image, and the display panel part includes:

a reflective pixel reflecting the light to display the first image; and

a transmissive pixel transmitting the light to display the second image.

9. The resistive type screen display apparatus of claim 8, wherein the first and the second images are different from each other.

10. The resistive type screen display apparatus of claim 8, wherein the first and the second images are substantially the same.

11. The resistive type screen display apparatus of claim 8, wherein the display panel part comprises:

an array substrate having the transmissive pixel and the reflective pixel;

a counter substrate having a common electrode facing the transmissive pixel and the reflective pixel; and

a liquid crystal layer disposed between the array substrate and the counter substrate.

12. The resistive type screen display apparatus of claim 11, wherein the light source part comprises:

a light source generating light; and

a light-guide plate facing the counter substrate and guiding the light to the counter substrate.

13. The resistive type screen display apparatus of claim 12, wherein the first electrode is disposed on a rear surface of the array substrate.

14. The resistive type screen display apparatus of claim 13, wherein the touch panel part further comprises a first polarizer having the second electrode disposed on a side facing the first electrode.

15. The resistive type screen display apparatus of claim 14, wherein the display panel part further comprises a second polarizer disposed between the counter substrate and the light-guide plate.

16. The resistive type screen display apparatus of claim 12, wherein the first electrode is disposed on the light-guide plate.

17. The resistive type screen display apparatus of claim 16, wherein the touch panel part further comprises a first polarizer having the second electrode disposed on a side facing the first electrode.

18. The resistive type screen display apparatus of claim 17, wherein the display panel part further comprises a second polarizer disposed on a rear surface of the array substrate.

19. A method of manufacturing a touch screen display apparatus comprising:

forming a resistive touch panel part including a first electrode, a second electrode facing the first electrode, and a porous polymer layer on a rear surface of an array substrate having a plurality of unit pixels, the porous polymer layer being disposed between the first and second electrodes for maintaining the distance between the first and second electrodes;

combining the array substrate and a counter substrate having a common electrode facing the unit pixels and interposing a liquid crystal layer between the array substrate and the counter substrate; and

assembling a light source part with the counter substrate.

20. The method of claim 19, wherein forming the touch panel part comprises:

forming the first electrode on the rear surface of the array substrate;

forming the porous polymer layer on the first electrode; and

combining a first polarizer having the second electrode with the array substrate.

21. The method of claim 19, wherein forming the touch panel part comprises:

forming the first electrode on the rear surface of the array substrate;

forming the second electrode on a first polarizer;

forming the porous polymer layer on the second electrode; and

combining the first polarizer with the array substrate for the first and second electrodes to face each other.

22. The method of claim 19, further comprising combining a second polarizer with the counter substrate.

23. A method of manufacturing a touch screen display apparatus comprising:

forming a resistive touch panel part including a first electrode, a second electrode facing the first electrode, and a porous polymer layer on a light-guide plate, the porous polymer layer being disposed between the first and second electrodes for increasing the uniformity of distance between the first and second electrodes; and

combining the display panel part with the light-guide plate.

24. The method of claim 23, wherein forming the touch panel part comprises:

forming the first electrode on the light-guide plate;

forming the porous polymer layer on the first electrode; and

combining a first polarizer having the second electrode with the light-guide plate.

25. The method of claim 23, wherein forming the touch panel part comprises:

forming the first electrode on the light-guide plate;

forming the second electrode on a first polarizer;

forming the porous polymer layer on the second electrode; and

combining the first polarizer with the light-guide plate so that the first and second electrodes face each other.