Touch circuit including pressure sensitive circuit, touch driving method and touch display panel

Patent metadata

Field	Value
Publication number	US-11086428-B2
Application number	US-201916613246-A
Country	US
Kind code	B2
Filing date	Apr 19, 2019
Priority date	Apr 24, 2018
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A touch circuit includes a touch circuit, a first energy storage circuit, a second energy storage circuit and a resetting circuit. A first end of the first energy storage circuit is connected to a control end of the touch circuit, and a second end thereof is connected to a first voltage input end. A first end of the second energy storage circuit is connected to a first conductive line, and a second end thereof is connected to the control end of the touch circuit. A first end of the touch circuit is connected to the first conductive line, and a second end thereof is connected to a third conductive line. A control end of the resetting circuit is connected to a second conductive line, a first end thereof is connected to the third conductive line, and a second end thereof is connected to a second voltage input end.

First claim

What is claimed is:

1. A touch circuit, comprising a touch sub-circuit, a first energy storage circuit, a second energy storage circuit, a resetting circuit, and a pressure sensitive circuit, wherein
a first end of the first energy storage circuit is connected to a control end of the touch sub-circuit, and a second end of the first energy storage circuit is connected to a first voltage input end;
a first end of the second energy storage circuit is connected to a first conductive line, and a second end of the second energy storage circuit is connected to the control end of the touch sub-circuit;
a first end of the touch sub-circuit is connected to the first conductive line, and a second end of the touch sub-circuit is connected to a third conductive line;
the touch sub-circuit is configured to control a voltage value of a voltage signal outputted to the third conductive line under the control of the control end of the touch sub-circuit;
a control end of the resetting circuit is connected to a second conductive line, a first end of the resetting circuit is connected to the third conductive line, and a second end of the resetting circuit is connected to a second voltage input end; and
the resetting circuit is configured to control the third conductive line to be electrically connected to, or electrically disconnected from, the second voltage input end under the control of the second conductive line,
a first end of the pressure sensitive circuit is connected to the control end of the touch sub-circuit, a second end of the pressure sensitive circuit is connected to a third voltage input end, wherein the pressure sensitive circuit is configured to enable the control end of the touch sub-circuit to be electrically connected to the third voltage input end when a pressure value of a pressure signal received by the pressure sensitive circuit is greater than a predetermined pressure value, and enable the control end of the touch sub-circuit to be electrically disconnected from the third voltage input end when the pressure value of the pressure signal received by the pressure sensitive circuit is smaller than or equal to the predetermined pressure value.

2. The touch circuit according to claim 1 , further comprising a touch sensing circuit connected to the third conductive line, and configured to determine whether a touch electrode block is being touched in accordance with the voltage value of the voltage signal on the third conductive line, and determine whether the pressure value of the pressure signal received by the pressure sensitive circuit is greater than the predetermined pressure value.

3. The touch circuit according to claim 1 , wherein the first conductive line is a first gate line in a row direction, the second conductive line is a second gate line adjacent to the first gate line in a column direction, and the third conductive line is a touch sensing line in the column direction.

4. The touch circuit according to claim 1 , wherein the first voltage input end and the second voltage input end are ground ends, and the third voltage input end is a low voltage input end.

5. The touch circuit according to claim 1 , wherein the touch sub-circuit comprises a touch transistor, the first energy storage circuit comprises a first capacitor, and the second energy storage circuit comprises a second capacitor;
a gate electrode of the touch transistor is the control end of the touch sub-circuit, a first electrode of the touch transistor is the first end of the touch sub-circuit, and a second electrode of the touch transistor is the second end of the touch sub-circuit;
a first end of the first capacitor is the first end of the first energy storage circuit, and a second end of the first capacitor is the second end of the first energy storage circuit;
a first end of the second capacitor is connected to the first conductive line, and a second end of the second capacitor is connected to the gate electrode of the touch transistor; and
the resetting circuit comprises a resetting transistor, a gate electrode of which is the control end of the resetting circuit, a first electrode of which is the first end of the resetting circuit, and a second electrode of which is the second end of the resetting circuit.

6. The touch circuit according to claim 1 , wherein the pressure sensitive circuit comprises a pressure sensitive transistor, a gate electrode of which is in a floating state, a first electrode of which is connected to the control end of the touch sub-circuit, and a second electrode of which is connected to the third voltage input end.

7. A touch driving method for the touch circuit according to claim 1 , comprising:
at a touch scanning stage, controlling, by a touch sub-circuit, the voltage value of the voltage signal outputted to the third conductive line under the control of the control end of the touch sub-circuit, the voltage value being used to determine whether a touch electrode block connected to the control end of the touch sub-circuit is being touched, and enabling, by the resetting circuit, the third conductive line to be electrically disconnected from the second voltage input end under the control of the second conductive line; and
at a resetting stage, enabling, by the resetting circuit, the third conductive line to be electrically connected to the second voltage input end under the control of the second conductive line, so as to reset a voltage across the third conductive line.

8. The touch driving method according to claim 7 , wherein the touch circuit further comprises a pressure sensitive circuit, and wherein the touch driving method further comprises;
at the touch scanning stage and the resetting stage, enabling, by the pressure sensitive circuit, the control end of the touch sub-circuit to be electrically connected to a third voltage input end when a pressure value of a pressure signal received by the pressure sensitive circuit is greater than a predetermined pressure value, and enabling, by the pressure sensitive circuit, the control end of the touch sub-circuit to be electrically disconnected from the third voltage input end when the pressure value of the pressure signal received by the touch sub-circuit is smaller than or equal to the predetermined pressure value.

9. The touch driving method according to claim 7 , wherein the touch circuit further comprises a touch sensing circuit, and wherein the touch driving method further comprises:
at the touch scanning stage, determining, by the touch sensing circuit, whether the touch electrode block is being touched in accordance with the voltage value of the voltage signal on the third conductive line, and determining whether the pressure value of the pressure signal received by the pressure sensitive circuit is greater than the predetermined pressure value.

10. A touch display panel, comprising:
a gate metal layer arranged on a substrate and comprising a plurality of first conductive lines and a plurality of second conductive lines, the plurality of first conductive lines and the plurality of second conductive lines being arranged alternately; and
a touch circuit layer and a touch electrode layer arranged on the gate metal layer, the touch electrode layer comprising a plurality of touch electrode blocks arranged in rows and columns and separated from each other, the touch circuit layer comprising a plurality of third conductive lines and a plurality of the touch circuits according to claim 1 arranged in rows and columns.

11. The touch display panel according to claim 10 , wherein a second insulation layer is arranged between the touch circuit layer and the gate metal layer, and a first insulation layer is arranged between the touch circuit layer a

Assignees

• Beijing Boe Display Tech Co
• Boe Technology Group Co Ltd

Inventors

• Wang Guangxing
• Dong Dianzheng
• Zhang Qiang
• Chen Pengming
• Xu Wenpeng
• Zhang Kan
• Li Jie

Classifications

• G06F3/0414 Primary

  using force sensing means to determine a position · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0443

  using a single layer of sensing electrodes · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F2203/04105

  Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position · CPC title