Display device and method of driving the same

Patent metadata

Field	Value
Publication number	US-9805690-B2
Application number	US-201414537526-A
Country	US
Kind code	B2
Filing date	Nov 10, 2014
Priority date	Dec 10, 2013
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A disclosed display device includes a touch panel including s number of receiving electrodes and k number of driving electrodes which are formed to intersect the receiving electrodes, k being less than s and larger than 2, the touch panel provided in an in-cell type. The display device further includes a touch sensing unit configured to respectively supply a first driving voltage and a second driving voltage to an nth driving electrode and an (n+1)th driving electrode, which are adjacent to each other among the driving electrodes, to determine whether the nth driving electrode is touched, n being a natural number which is more than one and less than k, the touch sensing unit further configured to respectively supply the first driving voltage and the second driving voltage to a kth driving electrode and a (k−1)th driving electrode to determine whether the kth driving electrode is touched.

First claim

What is claimed is:

1. A display device comprising:
a touch panel including s number of receiving electrodes and k number of driving electrodes which are formed to intersect the receiving electrodes, k being less than s and larger than 2, the touch panel provided in an in-cell type; and
a touch sensing unit configured to (i) supply a first driving voltage to an nth driving electrode and (ii) supply a second driving voltage different from the first driving voltage to an (n+1)th driving electrode while the first driving voltage is supplied to the nth driving electrode, the nth driving electrode and the (n+1) driving electrode being adjacent to each other among the driving electrodes, to determine whether the nth driving electrode is touched, n being a natural number which is more than one and less than k, the touch sensing unit further configured to (i) supply the first driving voltage to a kth driving electrode and (ii) supply the second driving voltage to a (k−1)th driving electrode while the first driving voltage is supplied to the kth driving electrode to determine whether the kth driving electrode is touched.

2. The display device of claim 1 , wherein the driving electrodes are formed in parallel with a plurality of gate lines formed in the touch panel.

3. The display device of claim 1 , wherein,
during a touch sensing period from a first touch sensing period to a (k−1)th touch sensing period included in one frame period, the touch sensing unit respectively supplies the first driving voltage and the second driving voltage to the nth driving electrode and the (n+1)th driving electrode which are adjacent to each other, and determines whether the nth driving electrode is touched, by using a plurality of sensing signals received from the receiving electrodes, and
during a kth touch sensing period, the touch sensing unit supplies the first driving voltage to the kth driving electrode, supplies the second driving voltage to the (k−1)th driving electrode, and determines whether the kth driving electrode is touched, by using the plurality of sensing signals received from the receiving electrodes.

4. A display device comprising:
a touch panel including a first touch electrode group in which s number of receiving electrodes and k number of driving electrodes are formed to intersect each other and a second touch electrode group in which s number of other receiving electrodes and (k+1)th to (2k)th driving electrodes are formed to intersect each other, k being less than s, the touch panel provided in an in-cell type, the receiving electrodes in the first touch electrode group electrically disconnected from said other receiving electrodes in the second touch electrode group; and
a touch sensing unit configured to (i) supply a first driving voltage to an nth driving electrode of the first touch electrode group and (ii) supply a second driving voltage different from the first driving voltage to an (n+1)th driving electrode of the first touch electrode group while the first driving voltage is supplied to the nth driving electrode of the first touch electrode group to determine whether the nth driving electrode of the first touch electrode group is touched, n being a natural number less than k, the touch sensing unit further configured to (i) supply the first driving voltage to a kth driving electrode of the first touch electrode group and (ii) supply the second driving voltage to a (k+1)th driving electrode of the second touch electrode group while the first driving voltage is supplied to the kth driving electrode of the first touch electrode group to determine whether the kth driving electrode of the first touch electrode group is touched.

5. The display device of claim 4 , wherein the receiving electrodes are formed in parallel with a plurality of gate lines formed in the touch panel.

6. The display device of claim 4 , wherein,
during a touch sensing period from a first touch sensing period to a (k−1)th touch sensing period included in one frame period, the touch sensing unit respectively supplies the first driving voltage and the second driving voltage to the nth driving electrode and the (n+1)th driving electrode which are adjacent to each other in each of the first and second touch electrode groups, determines whether the nth driving electrode in the first touch electrode group is touched by using a plurality of sensing signals received from the receiving electrodes in the first touch electrode group, and determines whether the nth driving electrode in the second touch electrode group is touched by using a plurality of sensing signals received from said other receiving electrodes in the second touch electrode group, and
during at least one touch sensing period subsequent to a kth touch sensing period among a plurality of touch sensing periods included in one frame period, the touch sensing unit respectively supplies the first driving voltage and the second driving voltage to the kth driving electrode configuring the first touch electrode group and the (k+1)th driving electrode configuring the second touch electrode group to determine whether the kth driving electrode is touched, by using the plurality of sensing signals received from the receiving electrodes in the first touch electrode group and said other receiving electrodes in the second touch electrode group.

7. The display device of claim 6 , wherein during at least one touch sensing period subsequent to the kth touch sensing period, the touch sensing unit respectively supplies the second driving voltage and the first driving voltage to the kth driving electrode and the (k+1)th driving electrode to determine whether the kth driving electrode is touched, by using the plurality of sensing signals received from the receiving electrodes in the first touch electrode group and said other receiving electrodes in the second touch electrode group.

8. The display device of claim 4 , wherein during at least one touch sensing period subsequent to a kth touch sensing period among a plurality of touch sensing periods included in one frame period, the touch sensing unit respectively supplies the first driving voltage and the second driving voltage to the (2k)th driving electrode configuring the second touch electrode group and a (2k−1)th driving electrode configuring the second touch electrode group to determine whether the (2k)th driving electrode is touched, by using a plurality of sensing signals received from said other receiving electrodes in the second touch electrode group.

9. A method of driving a display device, the method comprising:
supplying a first driving voltage to an nth driving electrode and supplying a second driving voltage different from the first driving voltage to an (n+1)th driving electrode while the first driving voltage is supplied to the nth driving electrode, the nth driving electrode and the (n+1) driving electrode being adjacent to each other among k number of driving electrodes which are formed to intersect s number of receiving electrodes, which are formed in a touch panel which is provided in an in-cell type in a panel, to determine whether the nth driving electrode is touched, k being less than s and larger than 2, n being a natural number which is more than one and less than k; and
supplying the first driving voltage to a kth driving electrode and supplying the second driving voltage to a (k−1)th driving electrode while the first driving voltage is supplied to the kth driving electrode to determine whether the kth driving electrode is touched.

10. A method of driving a display device, the method comprising:
supplying a first driving voltage to an nth driving electrode and supplying a second driving voltage different from the first driving voltage to an (n+1)th

Assignees

• Lg Display Co Ltd

Inventors

• Kang Seong Kyu
• Kim Hoon Bae
• Han Sung Su

Classifications

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/044

  by capacitive means · CPC title

• G09G5/006 Primary

  Details of the interface to the display terminal (specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04) · CPC title

• G06F2203/04111

  Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate · CPC title