US 2021/0200414 A1 · TOUCH DISPLAY APPARATUS

Abstract

A touch display apparatus is disclosed, which includes a display panel on which pixels and touch electrodes are disposed, a main power integrated circuit generating a common voltage signal applied to the touch electrodes and at least one gate voltage signal applied to the pixels, a touch power integrated circuit outputting a touch driving signal of a pulse type in accordance with a touch synchronization signal that defines a display driving period and a touch driving period, outputting a load free driving signal of the pulse type by using a gate low voltage signal of the at least one gate voltage signal, and outputting at least one pseudo touch driving signal corresponding to a pulse patterns of the touch driving signal and the load free driving signal and having reverse phase which is inverted, by using at least one gate high voltage signal of the at least one gate voltage signal, and a gate driving circuit supplying a gate pulse based on the at least one gate voltage signal to gate lines connected to the pixels for the display driving period, and supplying the load free driving signal to the gate lines for the touch driving period.

Claims20

Dependent claims

A touch display apparatus comprising:

a display panel on which pixels and touch electrodes are disposed;
a main power integrated circuit configured to generate a common voltage signal applied to the touch electrodes and at least one gate voltage signal applied to the pixels;
a touch power integrated circuit configured to:
output a touch driving signal of a pulse type in accordance with a touch synchronization signal that defines a display driving period and a touch driving period,
output a load free driving signal of the pulse type by using a gate low voltage signal of the at least one gate voltage signal, and
output at least one pseudo touch driving signal corresponding to a pulse pattern of the touch driving signal and the load free driving signal and having reverse phase which is inverted, by using at least one gate high voltage signal of the at least one gate voltage signal;
and
a gate driving circuit configured to:
supply a gate pulse based on the at least one gate voltage signal to gate lines connected to the pixels for the display driving period, and
supply the load free driving signal to the gate lines for the touch driving period.

7 more elements

A touch display apparatus comprising:

a display panel on which pixels and touch electrodes are disposed;
a main power integrated circuit configured to generate a common voltage signal applied to the touch electrodes and at least one gate voltage signal applied to the pixels;
a touch power integrated circuit configured to:
output a first touch driving signal of a pulse type in accordance with a touch synchronization signal that defines a display driving period and a touch driving period, and
output a first load free driving signal of the pulse type by using a gate low voltage signal of the at least one gate voltage signal;
a signal converter configured to output a pseudo touch driving signal by converting a phase of the first load free driving signal;
and
a signal recovery unit disposed at an input front end of the pixels, the signal recovery unit configured to recover the first load free driving signal from the pseudo touch driving signal.

5 more elements

Dependencies are inferred from the claim text.

Touch display apparatus

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Touch display apparatus

Life of this patent

Abstract

Claims20