TOUCH SCREEN PANEL AND METHOD FOR MANUFACTURING THE SAME

• US 20080055268A1
• Filed: 08/30/2007
• Published: 03/06/2008
• Est. Priority Date: 09/01/2006
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KANG, Chang-Wook, KATAKURA, Teruo, YOO, Dan-Sik
• Application Number:
  US11/847,825
• Publication Number:
  US 20080055268A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display

Abstract

A plurality of pixel parts is electrically connected to gate and source lines. Each of the pixel parts has a thin-film transistor (TFT) formed therein. A plurality of hall sensing parts is formed in the pixel parts. A plurality of hall sensing parts varies a reference current applied to the gate and the source lines by a magnetic member. The position detector is electrically connected to the gate lines and the source lines. The position detector detects a position of the magnetic member using the gate and source lines to which a varied current is applied. The plurality of hall sensing parts formed in the pixel parts detect the position of the magnetic member that approaches or contacts the screen of the display.

Claims

1. A touch screen panel comprising:

a plurality of pixel parts being electrically connected to one of a plurality of gate lines and one of a plurality of source lines;

a plurality of hall sensing parts formed in the pixel parts, the hall sensing parts varying a reference current applied to the gate lines and the source lines by a magnetic member; and

a position detector electrically connected to the gate lines and the source lines, the position detector detecting a position of the magnetic member using the gate and source lines to which the varied reference current is applied.

2. The touch screen panel of claim 1, wherein each of the pixel parts includes a thin-film transistor (TFT) electrically connected to one of the gate lines and one of the source lines, and the hall sensing parts are formed at edges of the gate lines and the source lines that cross each other and not in the TFT areas.

3. The touch screen panel of claim 2, wherein the hall sensing parts and the TFT are formed from the same layer.

4. The touch screen panel of claim 1, wherein each of the hall sensing parts comprises:

a first hall sensor electrically connected to the gate lines; and

a second hall sensor electrically connected to the source lines.

5. The touch screen panel of claim 4, wherein each of the first hall sensors comprises:

a first silicon layer formed on the gate lines;

first and second electrodes formed in two end portions of the first silicon layer, which are substantially parallel with the gate lines, the first and second electrodes being electrically connected to the gate lines; and

third and fourth electrodes formed in two end portions of the first silicon layer, which are substantially perpendicular to the gate lines, the third and fourth electrodes being electrically connected to the first and second electrodes, respectively.

6. The touch screen panel of claim 5, wherein the third and fourth electrodes apply an additional current generated by the magnetic member to the gate lines through the first and second electrodes to vary the reference current.

7. The touch screen panel of claim 4, wherein the second hall sensor comprises:

a second silicon layer formed on the source lines;

fifth and sixth electrodes formed in two end portions of the second silicon layer, which are substantially parallel with the source lines, the fifth and sixth electrodes being electrically connected to the source lines; and

seventh and eighth electrodes formed in two end portions of the second silicon layer, which are substantially perpendicular to the gate lines, the seventh and eighth electrodes being electrically connected to the fifth and sixth electrodes, respectively.

8. The touch screen panel of claim 7, wherein the seventh and eighth electrodes apply an additional current that is generated by the magnetic member to the source lines through the fifth and sixth electrodes to vary the reference current.

9. The touch screen panel of claim 4, further comprising:

a gate driving section disposed at a first side of the insulation substrate, the gate driving section that applies a gate voltage from the first side to a second side facing the first side; and

a source driving section disposed at a third side substantially perpendicular to the first and second sides, the source driving section that applies a source voltage from the third side to a fourth side facing the third side.

10. The touch screen panel of claim 9, wherein the position detector is integrated into the source driving section.

11. The touch screen panel of claim 10, wherein the position detector is electrically connected to a first detecting line part that connects end portions of the gate lines in correspondence to the second side, and a second detector that connects end portions of the source lines in correspondence to the fourth side.

12. The touch screen panel of claim 1, wherein at least one of the hall sensing part is formed in ‘

k’

number of the pixel parts, wherein k is a natural number.

13. The touch screen panel of claim 9, wherein the source driving section repeatedly applies a source start voltage and the source voltage to the source lines, and the reference current is synchronized to the source start voltage and supplied to the gate and source lines.

14. The touch screen panel of claim 13, further comprising:

a power supplying section electrically connected to the gate driving section and the source driving section to apply the gate voltage and the source voltage to the gate driving section and the source driving section,

wherein the reference current is applied from the gate driving section, the source driving section and the power supplying section.

15. The touch screen panel of claim 9, wherein the insulation substrate comprises a display part that has the gate and source lines formed thereon and a peripheral area to the display area, and the position detector is formed on the peripheral area.

16. A method for manufacturing a touch screen panel comprising:

forming a gate line and a source line on an insulation substrate, and a gate electrode on a thin-film transistor (TFT) area;

forming a first insulation layer on the gate electrode, the gate line and the source line;

forming a silicon layer on the TFT silicon area of the gate electrode, and a silicon layer on a hall sensing part area of the gate and source lines; and

forming a source electrode and a drain electrode on the TFT silicon layer, and a plurality of electrodes on the silicon layer.

17. The method of claim 16, wherein the number of the electrodes is at least four in correspondence to the gate line, and the number of the electrodes is at least four in correspondence to the source line.

18. The method of claim 17, wherein forming the electrode on the silicon layer comprises:

forming first and second electrodes substantially in parallel with the gate line on the silicon layer, which are electrically connected to the gate line; and

forming third and fourth electrodes substantially perpendicular to the gate line on the silicon layer, which are electrically connected to the first and second electrodes.

19. The method of claim 18, wherein forming the electrode on the silicon layer comprises:

forming fifth and sixth electrodes substantially in parallel with the source line on the silicon layer, which are electrically connected to the source line; and

forming seventh and eighth electrodes substantially perpendicular to the source line on the silicon layer, which are electrically connected to the fifth and sixth electrodes.

20. The method of claim 16, further comprising:

forming a second insulation layer on the source electrode, the drain electrode and the electrodes; and

forming a pixel electrode electrically connected to the drain electrode on the second insulation layer.