US 2021/0200380 A1 · TOUCH DEVICES WITH ALL SCAN LINES CASCADED AND DETERMINATION METHODS THEREOF

Abstract

A touch device includes a touch panel, a driving circuit, a sensing circuit, and a controller. The touch panel includes a first scan line cascaded with a first diode, a second scan line cascaded with a second diode, and a sense line interlaced with the first scan line and a second scan line. The first scan line and the second scan line are cascaded between a first node and a second node. The driving circuit generates a scan voltage across the first node and the second node according to a scan signal. The sensing circuit detects a capacitance of the sense line according to a detection signal to generate a receive signal. The controller generates the scan signal and the sense signal and determines the location of a touch point on the touch panel according to the scan voltage and the receive signal.

Claims12

Dependent claims

A touch device, comprising:

a touch panel, comprising:
a first scan line, cascaded with a first diode;
a second scan line, cascaded with a second diode, wherein the first scan line and the second scan line are cascaded between a first node and a second node;
and
a sense line, interlaced with the first scan line and the second scan line;
a driving circuit, generating a first scan voltage across the first node and the second node according to a scan signal;
a sense circuit, detecting a capacitance of the sense line according to a detection signal to generate a receive signal;
and
a controller, generating the scan signal and the detection signal and determining a location of a touch point on the touch panel according to the first scan voltage and the receive signal.

6 more elements

A determination method adapted to a touch panel, wherein the touch panel comprises a first scan line cascaded with a first diode, a second scan line cascaded with a second diode, and at least one sense line, wherein the first scan line and the second scan line are cascaded between a first node and a second node, and the sense line is interlaced with the first scan line and the second scan line, wherein the determination method comprises:

generating a first scan voltage across the first node and the second node;
detecting a capacitance of the sense line;
and
determining a location of a touch point of a touch event according to the first scan voltage and the capacitance of the sense line.

1 more element

Dependencies are inferred from the claim text.

Touch devices with all scan lines cascaded and determination methods thereof

Life of this patent

Touch devices with all scan lines cascaded and determination methods thereof

Life of this patent

Abstract

Claims12