Touch panel

Patent metadata

Field	Value
Publication number	US-9904365-B2
Application number	US-201414338709-A
Country	US
Kind code	B2
Filing date	Jul 23, 2014
Priority date	Dec 31, 2013
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

One embodiment of a touch panel comprises a substrate; a sensing electrode formed over the substrate, the sensing electrode configured to sense finger touch input and to provide haptic feedback; and an antenna formed over the substrate, the antenna configured to sense pen touch input; wherein a first mode in which the finger touch input is sensed, a second mode in which the haptic feedback is provided, and a third mode in which pen touch input is received are time-divisionally performed.

First claim

What is claimed is:

1. A touch panel comprising:
a substrate;
a sensing electrode formed over the substrate, the sensing electrode configured to sense finger touch input and to provide haptic feedback; and
an antenna formed over the substrate and on a same side of the substrate as the sensing electrode, the antenna configured to receive pen touch input;
wherein a first mode in which the finger touch input is sensed on the sensing electrode, a second mode in which the haptic feedback is provided to the sensing electrode, and a third mode in which pen touch input is received from the antenna are time-divisionally performed; and
wherein the first mode and the third mode are repeated in a pre-determined order in a first period, and wherein responsive to receiving a haptic driving signal during a second period that is subsequent to the first period, the second mode is performed at a beginning of the second period followed by the first mode and the third mode repeated in the pre-determined order in the second period, the haptic driving signal being generated based on a determination of finger touch input or pen touch input in the first period.

2. The touch panel of claim 1 , wherein the sensing electrode includes a first sensing electrode formed in a first direction and a second sensing electrode formed in a second direction, the first sensing electrode crossing the second sensing electrode,
wherein the second sensing electrode comprises a first portion and a second portion and wherein the first sensing electrode crosses the second sensing electrode between the first portion and the second portion of the second sensing electrode,
wherein the first sensing electrode and the second sensing electrode are formed in a same layer over the substrate, and
wherein the antenna includes a first antenna formed in the first direction and a second antenna formed in the second direction, the first antenna crossing the second antenna.

3. The touch panel of claim 2 , wherein the first antenna is formed to surround the second sensing electrode and the second antenna is formed to surround the first sensing electrode.

4. The touch panel of claim 2 , further comprises a bridge formed at an intersection of the first sensing electrode and the second sensing electrode.

5. The touch panel of claim 4 , wherein the bridge is electrically connected to the second sensing electrode through a bridge contact hole.

6. The touch panel of claim 2 , further comprises a jumper formed at an intersection of the second antenna and the first sensing electrode.

7. The touch panel of claim 1 , further comprises a line electrode electrically connected to the sensing electrode and formed in a non-effective area.

8. A touch panel comprising:
a substrate;
a sensing electrode formed over the substrate, the sensing electrode configured to sense finger touch input and to provide haptic feedback; and
an antenna formed over the substrate and on a same side of the substrate as the sensing electrode, the antenna configured to receive pen touch input;
wherein the sensing electrode and a portion of the antenna are formed with a substantially same vertical distance from the substrate, and
wherein a first mode in which the finger touch input is sensed on the sensing electrode, a second mode in which the haptic feedback is provided to the sensing electrode, and a third mode in which pen touch input is received from the antenna are time-divisionally performed; and
wherein the first mode and the third mode are repeated in a pre-determined order in a first period, and wherein responsive to receiving a haptic driving signal during a second period that is subsequent to the first period, the second mode is performed at a beginning of the second period followed by the first mode and the third mode repeated in the pre-determined order in the second period, the haptic driving signal being generated based on a determination of finger touch input or pen touch input in the first period.

9. The touch panel of claim 8 , wherein the antenna includes a first antenna formed in the first direction and a second antenna formed in the second direction, the first antenna crossing the second antenna.

10. The touch panel of claim 9 , wherein the first antenna is formed to surround the second sensing electrode and the second antenna is formed to surround the first sensing electrode.

11. A method of a touch driver unit for driving a touch panel including a substrate, a sensing electrode formed over the substrate and configured to sense finger touch input and to provide haptic feedback, and an antenna formed over the substrate and on a same side of the substrate as the sensing electrode and configured to receive pen touch input, the method comprising:
alternatively driving a touch driver of the touch driver unit that is configured to sense touch input on the touch panel via the sensing electrode and an antenna driver of the touch driver unit that is configured to sense pen touch input via the antenna; and
responsive to either the touch input or pen touch input, driving a haptic driver of the touch driver unit that is configured to generate a signal to the sensing electrode to provide the haptic feedback;
wherein in a first mode in which the finger touch input is sensed on the sensing electrode, a second mode in which the haptic feedback is provided to the sensing electrode, and a third mode in which pen touch input is received from the antenna are time-divisionally performed; and
wherein the first mode and the third mode are repeated in a pre-determined order in a first period, and wherein responsive to receiving a haptic driving signal during a second period that is subsequent to the first period, the second mode is performed at a beginning of the second period followed by the first mode and the third mode repeated in the pre-determined order in the second period, the haptic driving signal being generated based on a determination of finger touch input or pen touch input in the first period.

12. The method of claim 11 , wherein driving the haptic driver of the touch driver unit comprises:
driving the haptic driver rather than the touch driver and the antenna driver responsive to either the touch input or the pen touch input.

13. The method of claim 11 , wherein during a time period between generating the signal to the sensing electrode to provide the haptic feedback and generating a subsequent signal to the sensing electrode to provide the haptic feedback, the haptic driver is driven only once and the touch driver and the antenna driver are alternatively driven a different number of times.

14. The method of claim 13 , wherein a number of times that the antenna driver is driven is greater than a number of times that the touch driver is driven.

15. The method of claim 11 , wherein during a time period between generating the signal to the sensing electrode to provide the haptic feedback and generating a subsequent signal to the sensing electrode to provide the haptic feedback, the haptic driver is driven only once and the touch driver and the antenna driver are alternatively driven a same number of times.

Assignees

• Lg Display Co Ltd

Inventors

• Son Ji Eun
• Kim Ki Duk
• Hwang Jong Hee
• Han Jong Hyun

Classifications

• G06F3/016 Primary

  Input arrangements with force or tactile feedback as computer generated output to the user · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/0445

  using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer · 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