Method for manufacturing LCD device with integrated touch panel

• US 20050231487A1
• Filed: 01/25/2005
• Published: 10/20/2005
• Est. Priority Date: 04/16/2004
• Status: Abandoned Application

• Current Assignee: InnoLux Corporation
• Original Assignee: Toppoly Optoelectronics Corporation (InnoLux Corporation)
• Inventors: Ming, Jheng Ci
• Application Number:
  US11/041,220
• Publication Number:
  US 20050231487A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels

Abstract

A driving circuit of a touch panel is formed by the photolithographic process on the liquid crystal display (LCD) panel to reduce the area of the driving circuit. The method includes providing an LCD panel having a common substrate; and forming a touch panel on the common substrate. First, a first conducting layer is formed on the common substrate, and then a second patterned conducting layer is formed on the first conducting layer and on a peripheral region of the LCD panel by a photolithographic process. The common substrate of the LCD panel is used as an upper substrate of the LCD panel and as a lower substrate for the touch panel.

Claims

1. A method for manufacturing liquid crystal display (LCD) device with integrated touch panel, including the steps of:

providing an LCD panel having a common substrate and a peripheral region; and

forming a touch panel on the common substrate, wherein the step of forming the touch panel comprises forming a first conducting layer on the common substrate, and forming a second patterned conducting layer on the first conducting layer and on the peripheral region of the LCD panel by a photolithographic process.

2. The method according to claim 1, wherein the step of forming the second patterned conducting layer comprises the steps of:

forming a second conducting layer on the first conducting layer;

forming a photoresist layer on the second conducting layer;

irradiating and developing the photoresist layer through a photomask with a pattern of a driving circuit to form a patterned photoresist layer;

etching the second conducting layer using the patterned photoresist layer to form the second patterned conducting layer; and

removing the patterned photoresist layer.

3. The method according to claim 1, wherein the second patterned layer is used as a driving circuit of the touch panel.

4. The method according to claim 1, wherein said touch panel is a near field image (NFI) type.

5. The method according to claim 1, wherein said touch panel is a capacitive type.

6. A liquid crystal display (LCD) device with integrated touch panel, comprising:

an LCD panel having a common substrate and a peripheral region; and

a touch panel on the common substrate, wherein the touch panel comprises a first conducting layer on the common substrate, and a second patterned conducting layer panel on the peripheral region of the LCD panel.

7. The LCD device according to claim 6, wherein the second patterned conducting layer is used as a driving circuit of the touch panel.

8. The LCD device according to claim 6, wherein the touch panel further comprises an upper substrate on the second patterned conducting layer.

9. The LCD device according to claim 6, further comprising a polarizer on the upper substrate of the touch panel.

10. The LCD device according to claim 6, wherein said touch panel is a near field image (NFI) type.

11. The LCD device according to claim 6, wherein said touch panel is a capacitive type.