Touch display driving integrated circuit, operation method of the same, and touch display device including the same

Patent metadata

Field	Value
Publication number	US-11182001-B2
Application number	US-201916589604-A
Country	US
Kind code	B2
Filing date	Oct 1, 2019
Priority date	Feb 24, 2016
Publication date	Nov 23, 2021
Grant date	Nov 23, 2021

Abstract

A touch display driving integrated circuit (IC) includes a touch driver IC and a source driver IC. The touch driver IC is to be connected to touch electrodes through touch sensing lines. The touch driver IC provides a sensing signal to first touch sensing lines among the touch sensing lines in a touch period, and applies a common voltage to the first touch sensing lines before the touch period is terminated. The source driver IC is to be connected to pixels through data lines.

First claim

What is claimed is:

1. A touch display driving integrated circuit (IC) comprising:
a touch driver IC configured to be connected to touch electrodes through touch sensing lines, provide a sensing signal to the touch sensing lines in a single touch period, and sequentially apply a common voltage to the touch sensing lines after the single touch period is terminated; and
a source driver IC configured to be connected to pixels through data lines,
wherein first touch sensing lines are connected to touch electrodes in a first touch area of a plurality of touch areas, and second touch sensing lines are connected to touch electrodes in a second touch area of the plurality of touch areas, each of the first touch area and the second touch area corresponding to one row of touch electrodes,
wherein, during a single display period after the single touch period, the touch driver IC is further configured to:
apply the common voltage to the first touch sensing lines among the touch sensing lines and apply a voltage different from the common voltage to remaining touch sensing lines among the touch sensing lines while the source driver IC provides a first data signal to the data lines, and
apply the common voltage to the first touch sensing lines and the second touch sensing lines, among the touch sensing lines, and apply the voltage different from the common voltage to remaining touch sensing lines among the touch sensing lines while the source driver IC provides a second data signal to the data lines.

2. The touch display driving IC as set forth in claim 1 , wherein the touch driver IC is further configured to provide the sensing signal to the touch sensing lines to perform a touch scan operation on the touch electrodes.

3. The touch display driving IC as set forth in claim 1 , wherein the touch driver IC comprises:
a control logic circuit configured to generate a switching signal; and
a switching circuit connected to the touch sensing lines, and configured to switch between a common voltage node providing the common voltage, and touch sensing circuits in response to the switching signal.

4. The touch display driving IC as set forth in claim 3 , wherein the switching circuit is configured to connect each of the touch sensing lines to one of the common voltage node and the touch sensing circuits in response to the switching signal.

5. An operation method of a touch display driving integrated circuit (IC) configured to be connected to touch electrodes through touch sensing lines and to be connected to pixels through data lines, the operation method comprising:
providing a sensing signal to the touch sensing lines in a single touch period; and
sequentially providing a common voltage to the touch sensing lines while providing data signals to the data lines in a single display period,
wherein touch sensing lines are connected to touch electrodes in a touch area of a plurality of touch areas, and second touch sensing lines are connected to touch electrodes in a second touch area of the plurality of touch areas, each of the touch area and the second touch area corresponding to one row of touch electrodes,
wherein sequentially providing the common voltage to the touch sensing lines comprises:
providing the common voltage to the touch sensing lines among the touch sensing lines and a voltage different from the common voltage to remaining touch
sensing lines among the touch sensing lines while a first data signal is provided to the data lines, and
providing the common voltage to the touch sensing lines and the second touch sensing lines among the touch sensing lines and the voltage different from the common voltage to remaining touch sensing lines among the touch sensing lines while a second data signal is provided to the data lines.

6. A touch display device comprising:
a plurality of pixels disposed in each of first to n-th areas, n being an integer greater than 1;
a plurality of touch electrodes disposed in each of the first to n-th areas;
a common voltage node configured to provide a common voltage for the plurality of pixels;
a display driver IC configured to provide data signals to the plurality of pixels during a single display period of one frame; and
a touch driver IC configured to perform a touch scan operation on the plurality of touch electrodes during a single touch period after the single display period of the one frame,
wherein, during the single display period, the touch driver IC is further configured to:
connect the common voltage node to the plurality of touch electrodes in the first area and apply a voltage different from the common voltage to the plurality of touch electrodes in remaining areas other than the first area while a first data signal is applied to the plurality of pixels in the first area; and
connect the common voltage node to the plurality of touch electrodes in the first area and the second area and apply the voltage to the plurality of touch electrodes in remaining areas other than the first area and the second area while a second data signal is applied to the plurality of pixels in the second area.

7. The touch display device as set forth in claim 6 , wherein the touch driver IC is further configured to provide a sensing signal to the plurality of touch electrodes to perform the touch scan operation during the single touch period.

8. The touch display device as set forth in claim 6 , further comprising a switching circuit that connects each of the plurality of touch electrodes to one of the common voltage node, a ground voltage node, and a touch sensing circuit.

Assignees

• Samsung Electronics Co Ltd

Inventors

• PARK Haewoon
• Baek Seung-Hoon
• Jeong Jaehun
• Kwon Hyeokchul

Classifications

• G09G3/20

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/04166

  Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184) · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G06F3/04184

  Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally · CPC title