Method and apparatus for enhancing touch sensing in a display panel

Driving a touch-sensing-enabled active matrix LCD display panel for enhancing touch sensing by reducing parasitic capacitances is considered. In one embodiment, a plurality of driving voltages is generated. The driving voltages include a common voltage, and a first and a second gate-drive reference...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	Chen Jun, Chan Wing Chi Stephen, Lee Cheung Fai, Lei Yiu Sang
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING ELECTRIC DIGITAL DATA PROCESSING FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Driving a touch-sensing-enabled active matrix LCD display panel for enhancing touch sensing by reducing parasitic capacitances is considered. In one embodiment, a plurality of driving voltages is generated. The driving voltages include a common voltage, and a first and a second gate-drive reference voltages for configuring a thin film transistor (TFT) in the panel to switch on and off, respectively. When the panel is operated in a sensing mode, the common voltage that is generated includes a pulse-train waveform. Furthermore, each of the first and the second gate-drive reference voltages is substantially time-synchronized to and includes the pulse-train waveform of the common voltage during the sensing mode. In one option, the driving voltages further include a sensing-mode source-drive voltage acting as a source-drive signal for the TFT during the sensing mode. The sensing-mode source-drive voltage is substantially time-synchronized to and includes the pulse-train waveform of the common voltage.