Touch screen panel and display device having the same

Patent metadata

Field	Value
Publication number	US-10606397-B2
Application number	US-201514806010-A
Country	US
Kind code	B2
Filing date	Jul 22, 2015
Priority date	Oct 10, 2014
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

A touch screen panel and display device having the same are disclosed. In one aspect, the touch screen panel includes a base layer, a noise shielding layer formed over a base layer, and a plurality of first touch sensors formed over the base layer. The touch screen panel further includes a plurality of second touch sensors formed over the base layer and electrically insulated from the first touch sensors. The second touch sensors cross the first touch sensors. The touch screen panel also includes a first pad part electrically insulated from and overlapping the noise shielding layer, wherein the first pad part comprises a plurality of signal pads. The touch screen panel further includes a plurality of touch signal lines respectively electrically connecting the signal pads to the first and second touch sensors.

First claim

What is claimed is:

1. A touch screen panel, comprising:
a base layer;
a noise shielding layer formed over the base layer;
a plurality of first touch sensors formed over the base layer;
a plurality of second touch sensors formed over the base layer and electrically insulated from the first touch sensors, wherein the second touch sensors cross the first touch sensors and the first and second touch sensors are in a sensing area;
a first pad part electrically insulated from and overlapping the noise shielding layer, wherein the first pad part comprises a plurality of signal pads;
a line part comprising a plurality of touch signal lines respectively electrically connecting the signal pads to the first and second touch sensors; and
an insulating layer interposed: i) between the first touch sensors and the second touch sensors and ii) between the noise shielding layer and the first pad part,
wherein the noise shielding layer is disposed on a same layer as at least a portion of the first and second touch sensors, and the noise shielding layer overlaps at least the plurality of signal pads of the first pad part and does not overlap the sensing area,
wherein the first pad part further comprises at least one first auxiliary pad electrically connected to the noise shielding layer via a contact hole formed in the insulating layer, and
wherein the first auxiliary pad is configured to receive a constant direct current (DC) voltage.

2. The touch screen panel of claim 1 , wherein each of the first touch sensors comprises: i) a plurality of first electrodes arranged in a first direction and ii) a plurality of first connectors each connecting two of the first electrodes, wherein each of the second touch sensors comprises i) a plurality of second electrodes arranged in a second direction crossing the first direction and ii) a plurality of second connectors each connecting two of the second electrodes, and wherein the first and second electrodes have a mesh structure.

3. The touch screen panel of claim 2 , wherein the touch screen panel is formed on an organic light-emitting diode (OLED) display panel, wherein the OLED display panel comprises a sealing layer, and wherein the base layer is the sealing layer of the OLED display.

4. The touch screen panel of claim 2 , wherein the base layer is a base substrate.

5. The touch screen panel of claim 1 , further comprising an electrostatic discharge line configured to receive a constant direct current (DC) voltage, wherein the base layer comprises the sensing area in which the first and second touch sensors are arranged and a non-sensing area in which the electrostatic discharge line is formed, wherein the non-sensing area surrounds the sensing area.

6. The touch screen panel of claim 5 , wherein the at least one first auxiliary pad is provided in a plural number, wherein one end of the electrostatic discharge line is electrically connected to one of the first auxiliary pads, and wherein another end of the electrostatic discharge line is electrically connected to another of the first auxiliary pads.

7. The touch screen panel of claim 5 , wherein the first pad part further comprises a plurality of second auxiliary pads configured to apply the DC voltage to the electrostatic discharge line, wherein one end of the electrostatic discharge line is electrically connected to one of the second auxiliary pads, and wherein another end of the electrostatic discharge line is electrically connected to another of the second auxiliary pads.

8. A display device comprising:
a display panel comprising a display area configured to display an image and a non-display area adjacent to the display area; and
a touch screen panel formed over the display panel,
wherein the touch screen panel comprises:
a noise shielding layer formed over the display panel and overlapping only the non-display area;
a plurality of first touch sensors formed over the display panel;
a plurality of second touch sensors formed over the display panel and electrically insulated from the first touch sensors, wherein the second touch sensors cross the first touch sensors and the first and second touch sensors are in a sensing area;
a first pad part electrically insulated from and overlapping the noise shielding layer, wherein the first pad part comprises a plurality of signal pads;
a first line part comprising a plurality of touch signal lines respectively electrically connecting the signal pads to the first and second touch sensors; and
an insulating layer interposed: i) between the first touch sensors and the second touch sensors and ii) between the noise shielding layer and the signal pads,
wherein the noise shielding layer overlaps at least the plurality of signal pads of the first pad part and does not overlap the sensing area,
wherein the first pad part further comprises at least one first auxiliary pad electrically connected to the noise shielding layer via a contact hole formed in the insulating layer, and
wherein the first auxiliary pad is configured to receive a constant direct current (DC) voltage.

9. The display device of claim 8 , wherein each of the first touch sensors comprises: i) a plurality of first electrodes arranged in a first direction and a plurality of first connectors each connecting two of the first electrodes, wherein each of the second touch sensors comprises: i) a plurality of second electrodes arranged in a second direction crossing the first direction and ii) a plurality of second connectors each connecting two of the second electrodes, and one of the first and second electrodes have a mesh structure.

10. The display device of claim 9 , wherein the display panel comprises:
a base substrate;
a wire layer formed over the base substrate;
a device layer formed over the wire layer; and
a sealing layer covering the device layer,
wherein the noise shielding layer and the first touch sensors are directly formed on the sealing layer.

11. The display device of claim 10 , wherein the wire layer comprises:
a plurality of driving lines electrically connected to the device layer;
a plurality of display signal lines electrically connected to the driving lines; and
a second pad part comprising a plurality of pads connected to the display signal lines,
wherein the noise shielding layer overlaps the display signal lines.

12. The display device of claim 8 , further comprising an electrostatic discharge line configured to receive a constant direct current (DC) voltage, wherein the display panel comprises the sensing area in which the first and second touch sensors are arranged and a non-sensing area in which the electrostatic discharge line is formed, wherein the non-sensing area surrounds the sensing area.

13. The display device of claim 12 , wherein the at least one first auxiliary pad is provided in a plural number, wherein one end of the electrostatic discharge line is electrically connected to one of the first auxiliary pads, and wherein another end of the electrostatic discharge line is electrically connected to another of the first auxiliary pads.

14. The display device of claim 12 , wherein the first pad part further comprises a plurality of second auxiliary pads configured to apply the DC voltage to the electrostatic discharge line, wherein one end of the electrostatic discharge line is electrically connected to one of the second auxiliary pads, and wherein another end of the electrostatic discharge line is electrically connected to another of the second auxiliary pads.

Assignees

• Samsung Display Co Ltd

Inventors

• Jun Sanghyun

Classifications

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F3/0416 Primary

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title