Touch control device, touch display device, and driving method thereof

• US 10,275,099 B2
• Filed: 07/13/2016
• Issued: 04/30/2019
• Est. Priority Date: 05/24/2016
• Status: Active Grant

• Current Assignee: Tianma Microelectronics Company Limited, Xiamen Tianma Micro-Electronics Co., Ltd.
• Original Assignee: Tianma Microelectronics Company Limited, Xiamen Tianma Micro-Electronics Co., Ltd.
• Inventors: Sun, Ying, Tang, Yanfang, Xu, Yumin
• Primary Examiner(s): Butcher, Brian M
• Application Number:
  US15/209,558
• Publication Number:
  US 20170344146A1
• Time in Patent Office: 1,021 Days
• Field of Search: None
• CPC Class Codes: G06F 2203/04104 Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
• CPC Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 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 Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A touch control device, a driving method of a touch control device, a touch display device, and a driving method of a touch control device are provided. The touch control device comprises a first electrode layer and a second electrode layer. The first electrode and the second electrode layer are electrically insulated from each other. The first electrode layer includes a plurality of mutually insulated first electrodes arranged in an array. The second electrode layer is disposed on a different layer other than the first electrode layer, and includes at least one second electrode. The first electrode is configured to detect a touch position in a first touch control time period, and the first electrode and the second electrode are configured to detect a touch force in a second touch control time period.

Claims

1. A touch control device, comprising:

a first electrode layer including a plurality of mutually insulated first electrodes arranged in an array;

a second electrode layer disposed on a different layer other than the first electrode layer, and including at least one second electrode; and

a plurality of third electrodes extending in a second direction and disposed on a same layer as the first electrodes, wherein;

the first electrode layer and the second electrode layer are electrically insulated from each other,

a first electrode of the plurality of first electrodes is configured to detect a touch position in a first touch control time period,

the first electrode of the plurality of first electrodes and the at least one second electrode are configured to detect a touch force in a second touch control time period,

in the first touch control time period, the at least one second electrode is configured to detect the touch position together with the first electrodes, wherein the first electrodes are driving electrodes in mutual capacitance electrodes and a touch scanning voltage signal is provided to the first electrodes, and the at least one second electrode is a sensing electrode in the mutual capacitance electrodes and a voltage signal is detected at the at least one second electrode,

a third electrode of the plurality of third electrodes includes at least one through-hole,

the first electrode of the plurality of first electrodes is disposed on the at least one through-hole and electrically insulated from the third electrode of the plurality of third electrodes, and

in the first touch control time period, the third electrodes are the driving electrodes in the mutual capacitance electrodes.

2. The touch control device according to claim 1, wherein:

the second electrode layer includes a plurality of mutually insulated second electrodes extending along a first direction; and

in the first touch control time period, the second electrodes are sensing electrodes in the mutual capacitance electrodes, and are configured to detect the touch position together with the first electrodes.

3. The touch control device according to claim 1, wherein:

the at least one second electrode is the sensing electrode in the mutual capacitance electrodes in the first touch control time period;

the at least one second electrode and the third electrodes are striped electrodes; and

in a direction perpendicular to a surface of the touch control device, the first electrodes are disposed at crossing positions of the at least one second electrode and the third electrodes.

4. A driving method of a touch control device comprising a first electrode layer including a plurality of mutually insulated first electrodes arranged in an array;

and a second electrode layer disposed on a different layer other than the first electrode layer, and including at least one second electrode, wherein the first electrode layer and the second electrode layer are electrically insulated from each other, a first electrode of the plurality of first electrodes is configured to detect a touch position in a first touch control time period, and the first electrode of the plurality of first electrodes and the at least one second electrode are configured to detect a touch force in a second touch control time period, wherein the driving method comprises;

in the second touch control time period, providing a pulsed voltage signal to the first electrodes and providing a constant voltage signal to the at least one second electrode, such that the touch force is detected,

wherein the first electrode of the plurality of first electrodes is a driving electrode and the at least one second electrode is a sensing electrode in mutual capacitance electrodes, respectively, the driving method further comprises;

in the first touch control time period, providing a touch scanning voltage signal to the first electrode of the plurality of first electrodes and detecting a voltage signal of the at least one second electrode, such that the touch position is detected, and

wherein the touch control device further comprises a plurality of third electrodes extending in a second direction and disposed on a same layer as the first electrodes, wherein a third electrode of the plurality of third electrodes includes at least one through-hole, the first electrode of the plurality of first electrodes is disposed on the at least one through-hole and electrically insulated from the third electrode of the plurality of third electrodes, the driving method further comprises;

in a first touch detection stage, providing the touch scanning voltage signal to the third electrode of the plurality of third electrodes, wherein the third electrode of the plurality of third electrodes is provided with a same touch scanning voltage signal as the first electrode of the plurality of first electrodes disposed in the at least one through-hole of the third electrode of the plurality of third electrodes.

5. A touch display device, comprising:

an array substrate;

a color film substrate arranged opposite to the array substrate; and

a display panel comprising a first electrode layer including a plurality of mutually insulated first electrodes arranged in an array; and

a second electrode layer disposed on a different layer other than the first electrode layer, and including at least one second electrode, wherein the first electrode layer and the second electrode layer are electrically insulated from each other, a first electrode of the plurality of first electrodes is configured to detect a touch position in a first touch control time period, and the first electrode of the plurality of first electrodes and the at least one second electrode are configured to detect a touch force in a second touch control time period,

wherein the first electrode layer is disposed on a surface of the color film substrate that is far from the array substrate, and the second electrode layer is disposed between the array substrate and the color film substrate, and

in a touch stage, the first electrode of the plurality of first electrodes is a driving electrode and a touch scanning voltage signal is provided to the first electrodes, and the at least one second electrode is a sensing electrode in mutual capacitance electrodes and a voltage signal is detected at the at least one second electrode,

in a display stage, the first electrode of the plurality of first electrodes is a common electrode, and

wherein the touch display device further comprises a plurality of third electrodes extending in a second direction and disposed on a same layer as the first electrodes, a third electrode of the plurality of third electrodes includes at least one through-hole, the first electrode of the plurality of first electrodes is disposed on the at least one through-hole and electrically insulated from the third electrode of the plurality of third electrodes, wherein;

in the display stage, the third electrode of the plurality of third electrodes is the common electrode.

6. The touch display device according to claim 5, wherein

the array substrate further includes a plurality of data lines extending a first direction and a plurality of scanning lines extending in a second direction;

and

the plurality of data lines cross the plurality of scanning lines to define a plurality of pixel units.

7. A driving method of a touch display device comprising an array substrate;

a color film substrate arranged opposite to the array substrate; and

a display panel comprising a first electrode layer including a plurality of mutually insulated first electrodes arranged in an array; and

a second electrode layer disposed on a different layer other than the first electrode layer, and including at least one second electrode, wherein the first electrode layer and the second electrode layer are electrically insulated from each other, a first electrode of the plurality of first electrodes is configured to detect a touch position in a first touch control time period, and the first electrode of the plurality of first electrodes and the at least one second electrode are configured to detect a touch force in a second touch control time period, wherein the first electrode layer is disposed on a surface of the color film substrate that is far from the array substrate, and the second electrode layer is disposed between the array substrate and the color film substrate, the driving method comprises;

in the second touch control time period, providing a pulsed voltage signal to the first electrodes and providing a constant voltage signal to the at least one second electrode, such that the touch force is detected,

wherein the first electrode of the plurality of first electrodes is a driving electrode and the at least one second electrode is a sensing electrode in mutual capacitance electrodes, respectively, the driving method further comprises;

in the first touch control time period, providing a touch scanning voltage signal to the first electrode of the plurality of first electrodes and detecting a voltage signal of the at least one second electrode, such that the touch position is detected,

wherein the first electrode of the plurality of first electrodes is a driving electrode and the at least one second electrode is a sensing electrode in mutual capacitance electrodes, respectively, the driving method further comprises;

in a display stage, providing a common voltage signal to the first electrode of the plurality of first electrodes, and

wherein the touch display device further comprises a plurality of third electrodes extending in a second direction and disposed on a same layer as the first electrodes, wherein a third electrode of the plurality of third electrodes includes at least one through-hole, the first electrode of the plurality of first electrodes is disposed on the at least one through-hole and electrically insulated from the third electrode of the plurality of third electrodes, the driving method further comprises;

in the first touch detection stage, providing the touch scanning voltage signal to the third electrode of the plurality of third electrodes, wherein the third electrode of the plurality of third electrodes is provided with a same touch scanning voltage signal as the first electrode of the plurality of first electrodes disposed in the at least one through-hole of the third electrode of the plurality of third electrodes; and

in the display stage, providing the common voltage signal to the third electrode of the plurality of third electrodes.