Method of fabricating liquid crystal display apparatus integrated with film type touch panel

• US 20030147041A1
• Filed: 12/26/2002
• Published: 08/07/2003
• Est. Priority Date: 12/27/2001
• Status: Abandoned Application

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Philips LCD Company Limited (LG Display Co., Ltd.)
• Inventors: You, Tae Ho, Oh, Eui Yeol, Bang, Yong Ik
• Application Number:
  US10/328,169
• Publication Number:
  US 20030147041A1
• Time in Patent Office: Days
• US Class Current: 349/187
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A method of fabricating a film type touch panel integrated liquid crystal display apparatus includes the steps of forming a liquid crystal display panel that includes gate lines, data lines, and a plurality of liquid crystal cells; cleaning the liquid crystal display panel; attaching a polarizer integrated touch panel to the cleaned liquid crystal display panel, the polarizer integrated touch panel being configured to generate an electrical signal in response to a pressure applied at a portion of the touch panel by an external force; completing a liquid crystal display module by a TAB process in which the liquid crystal display panel is electrically connected to a printed circuit board (PCB) that is configured to apply a driving signal to the liquid crystal display panel; and assembling the liquid crystal display module with a backlight unit.

Claims

1. A method of fabricating a film type touch panel integrated liquid crystal display apparatus, the method comprising the steps of:

forming a liquid crystal display panel that includes gate lines, data Lines, and a plurality of liquid crystal cells;

cleaning the liquid crystal display panel;

attaching a polarizer integrated touch panel to the cleaned liquid crystal display panel, the polarizer integrated touch panel being configured to generate an electrical signal in response to a pressure applied at a portion of the touch panel by an external force;

completing a liquid crystal display module by a TAB process in which the liquid crystal display panel is electrically connected to a printed circuit board (PCB) that is configured to apply a driving signal to the liquid crystal display panel; and

assembling the liquid crystal display module with a backlight unit.

2. The method according to claim 1, further includes the step of:

inspecting the resulting film type touch panel integrated liquid crystal display apparatus for its design functions.

3. The method according to claim 1, further including the step of forming the polarizer integrated touch panel by forming a touch panel on a polarizing sheet before the step of attaching the polarizer integrated touch panel.

4. The method according to claim 3, wherein the step of forming the polarizer integrated touch panel includes the steps of:

forming a lower sheet of the touch panel on the polarizing sheet;

forming an upper sheet of the touch panel;

forming a spacer on the lower sheet of the touch panel that has been formed on the polarizing sheet; and

bonding the upper sheet to the lower sheet.

5. The method according to claim 4, wherein the step of forming the lower sheet of the touch panel includes the steps of:

forming a first sheet on the polarizer;

spreading a lower transparent conductive layer on an entire surface of the first sheet; and

forming a first electrode layer at an edge of the lower transparent conductive layer in a first direction for sensing a positional signal in a direction substantially perpendicular to the first direction.

6. The method according to claim 5, wherein the step of forming the upper sheet of the touch panel includes steps of:

spreading an upper transparent conductive layer on an entire surface of a sheet; and

forming a second electrode layer at an edge of the upper transparent conductive layer in a second direction for sensing a positional signal in a direction substantially perpendicular to the second direction.

7. The method according to claim 6, wherein the first and the second directions are substantially perpendicular to each other.

8. The method according to claim 6, wherein the upper and the lower sheets are made of polyethylene terephthalate (PET).

9. The method according to claim 6, wherein the upper and the lower transparent conductive layers include at least one of indium-tin-oxide (ITO), indium-zinc-oxide (IZO) and indium-tin-zinc-oxide (ITZO).

10. The method according to claim 1, further including the step of forming the polarizer integrated touch panel by using a polarizing sheet as a lower sheet of the touch panel before the step of attaching the polarizer integrated touch panel.

11. The method according to claim 10, wherein the step of forming the polarizer integrated touch panel includes the steps of:

forming the lower sheet of the touch panel from the polarizing sheet;

forming an upper sheet of the touch panel;

forming a spacer on the lower sheet of the touch panel, and bonding the upper sheet to the lower sheet.

12. The method according to claim 1, wherein the step of forming the lower sheet of the touch panel form the polarizing sheet includes the steps of:

forming a lower transparent conductive layer on an entire surface of the polarizing sheet; and

forming a first electrode layer at an edge of the lower transparent conductive layer in a first direction for sensing a positional signal in a direction substantially perpendicular to the first direction.

13. The method according to claim 12, wherein the step of forming the upper sheet of the touch panel includes the steps of:

forming an upper transparent conductive layer on an entire surface of a sheet; and

forming a second electrode layer at an edge of the upper transparent conductive layer in a second direction for sensing a positional signal in a direction substantially perpendicular to the second direction.

14. The method according to claim 13, wherein the first and the second directions are substantially perpendicular to each other.

15. The method according to claim 13, wherein the upper and the lower sheets are made of polyethylene terephthalate (PET).

16. The method according to claim 13, wherein the upper and the lower transparent conductive layers include at least one of indium-tin-oxide (ITO), indium-zinc-oxide (IZO) and indium-tin-zinc-oxide (ITZO).

17. The method according to claim 1, wherein the step of assembling the backlight unit and the liquid crystal display panel includes the step of assembling a light source, a lamp housing, a light guide plate a diffusion sheet, and a reflector into the backlight unit and assembling the resulting backlight unit and the liquid crystal display module into the film type touch panel integrated liquid crystal display apparatus.

18. The method according to claim 1, further comprising the steps of:

providing a main support to support the back light unit with respect to the liquid crystal display panel;

covering an edge of the main support by a bottom cover; and

coupling the bottom cover with a top case to cover an upper surface end of the touch panel and a side surface of the main support.

19. The method according to claim 1, wherein the polarizer integrated touch panel is configured such that the external force can be applied by one of a stylus pen or a finger.

20. A method of fabricating a touch panel integrated liquid crystal display apparatus, the method comprising the steps of:

forming a liquid crystal display panel;

attaching a polarizer integrated touch panel to the liquid crystal display panel, the polarizer integrated touch panel being configured to generate an electrical signal in response to a pressure applied at a portion of the touch panel by an external force; and

attaching a printed circuit board to the liquid crystal display having the polarizer integrated touch panel attached thereto.