DISPLAY WITH TOUCH SCREEN PANEL AND METHOD OF MANUFACTURING THE SAME

• US 20090091546A1
• Filed: 08/06/2008
• Published: 04/09/2009
• Est. Priority Date: 10/04/2007
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jung, Sun-Kyo, Baek, Ju-Hyeon, Jeong, Ji-Young, Joo, Sun-Kyu, Lee, Myung-Sub
• Application Number:
  US12/187,250
• Publication Number:
  US 20090091546A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G02F 2202/16 conductive

Abstract

A display device with a built-in touch screen panel and a method of manufacturing the same are presented. The display includes a first substrate and a second substrate facing each other, a first sensing electrode and a second sensing electrode disposed on the first substrate and spaced apart from each other, and a conductive spacer disposed on the second substrate corresponding to each of the first and second sensing electrodes. The display device is less sensitive to misalignment between the first and second substrates during the manufacturing process compared to a conventional device, and therefore has a lower defect rate than the conventional device.

Claims

1. A display comprising:

a first substrate and a second substrate facing each other;

a first sensing electrode and a second sensing electrode disposed on the first substrate, wherein the first and second sensing electrodes are spaced apart from each other; and

a conductive spacer disposed on the second substrate, wherein the conductive spacer is disposed so as to correspond to each of the first and second sensing electrodes.

2. The display of claim 1, wherein the first substrate comprises:

a first sensing line arranged in one direction of the first substrate; and

a second sensing line intersecting the first sensing line, the first and second sensing lines being insulated from each other.

3. The display of claim 2, wherein the first and second sensing electrodes are connected to the first and second sensing lines, respectively.

4. The display of claim 3, wherein the second sensing line is provided for one or more unit pixels.

5. The display of claim 1, wherein the cross section of the conductive spacer becomes wider as it extends from a region corresponding to a center of each of the first and second sensing electrodes toward a region corresponding to outer edges of the first and second sensing electrodes.

6. The display of claim 5, wherein the cross section of the conductive spacer has a small width at a region between the first and second sensing electrodes.

7. The display of claim 6, wherein the cross section of the conductive spacer has a maximum width at a region corresponding to the each center of the first and second sensing electrodes.

8. The display of claim 1, wherein the conductive spacer has cross sections that are spaced apart from each other and the cross sections have wider regions corresponding to the each central portions of the first and second sensing electrodes.

9. The display of claim 1, wherein the conductive spacer comprises two spacers that are spaced apart from each other.

10. The display of claim 9, wherein the conductive spacer is provided for one or more unit pixels, and is disposed on a black matrix.

11. The display of claim 1, wherein portions of the first and second sensing electrodes extend to cross each other.

12. A method of manufacturing a display, the method comprising:

forming first and second sensing lines and first and second sensing electrodes connected to the first and second sensing lines, respectively, on a first substrate, wherein the first and second sensing lines extend in a first direction and a second direction, respectively, and are insulated from each other;

forming a conductive spacer on a second substrate, the conductive spacer formed on a region corresponding to each of the first and second sensing electrodes;

forming a cell gap spacer between the first and second substrates; and

forming a liquid crystal layer between the first and second substrates.

13. The method of claim 12, wherein forming the first and second sensing lines comprises:

forming a plurality of gate lines extending in the first direction and the first sensing line spaced apart from the plurality of gate lines on the first substrate;

forming a gate insulating layer on the first substrate, and forming an active layer and an ohmic contact layer on a predetermined region of the gate insulating layer;

forming a plurality of data lines extending in the second direction, the second sensing line spaced apart from the plurality of data lines on the gate insulating layer;

forming a passivation layer on the substrate, and etching a predetermined region of the passivation layer to form a plurality of contact holes; and

forming a pixel electrode on the passivation layer, and forming the sensing electrode connected to the first and second sensing lines.

14. The method of claim 12, wherein forming the conductive spacer comprises:

forming a black matrix on a predetermined region of the second substrate;

forming a protrusion extending along the sensing electrode in a region corresponding to the sensing electrode on the second substrate, and forming a color filter; and

forming a conductive layer on the second substrate, and patterning the conductive layer to form a common electrode and a conductive spacer.

15. The method of claim 14, wherein the protrusion is formed by a photolithography process using a mask exposing regions corresponding to respective central portions of the first and second sensing electrodes.

16. The method of claim 14, wherein the protrusion comprises two protrusions spaced apart from each other.