Touch screen display apparatus and method of driving the same

• US 8,072,430 B2
• Filed: 06/27/2007
• Issued: 12/06/2011
• Est. Priority Date: 07/18/2006
• Status: Expired due to Fees

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Dong-gyu, Baek, Seung-soo
• Primary Examiner(s): Mengistu, Amare
• Assistant Examiner(s): Zhou, Hong
• Application Number:
  US11/769,335
• Publication Number:
  US 20080018613A1
• Time in Patent Office: 1,623 Days
• Field of Search: 345173-175, 345/87, 178 1801- 1809, 349/12, 349/23, 349/24, 349/41, 349/42, 349/149
• US Class Current: 345/173
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• 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
• CPC Class Codes: G09G 2310/0224 Details of interlacing

Abstract

A touch screen display apparatus and a method of driving the same in which the touch screen display apparatus includes a first transparent substrate, a gate line and a sensor conductor formed on the first transparent substrate, a data line insulated from and intersecting the gate line and sensor conductor, a second transparent substrate facing the first transparent substrate, and a sensor electrode formed on the second transparent substrate so as to correspond to an intersection of the sensor conductor and the data line, the sensor electrode electrically connecting the sensor conductor with the data line when acted upon by an external pressure.

Claims

1. A touch screen display apparatus comprising:

a first transparent substrate;

a gate line and a sensor conductor formed on the first transparent substrate;

a data line insulated from and intersecting the gate line and sensor conductor;

a second transparent substrate facing the first transparent substrate;

a sensor electrode formed on the second transparent substrate so as to correspond to an intersection of the sensor conductor and the data line, the sensor electrode electrically connecting the sensor conductor with the data line when acted upon by an external pressure,

a passivation layer formed on the sensor conductor and the data line and having first and second contact holes partially exposing the sensor conductor and the data line, respectively;

first and second electrode pads formed on the passivation layer to be connected with the sensor conductor and the data line through the first and second contact holes, respectively; and

a planarization pattern formed between the first electrode pad and the first transparent substrate for the purpose of flattening the surface of the first electrode pad and the surface of the second electrode pad, wherein the passivation layer is made of an insulating material; and

wherein the planarization pattern is made of the same material on the same plane as the data line.

2. The touch screen display apparatus of claim 1, wherein the sensor electrode is connected with the first and second electrode pads when an external pressure is applied.

3. The touch screen display apparatus of claim 1, wherein the passivation layer includes a third contact hole for connecting the planarization pattern with the first electrode pad.

4. The touch screen display apparatus of claim 1, wherein at least two of red, green, and blue color filters overlapping each other are disposed between the second transparent substrate and the sensor conductor.

5. The touch screen display apparatus of claim 1, wherein a sensor spacer having a height less than that of a cell gap between the first transparent substrate and the second transparent substrate is formed between the second transparent substrate and the sensor conductor.

6. The touch screen display apparatus of claim 1, wherein a blue pixel is defined by an intersection of the gate line and the data line.

7. The touch screen display apparatus of claim 1, wherein the sensor conductor is implemented by a storage conductor, and a common voltage and a sensor voltage for touch screen driving are alternately applied to the sensor conductor.