In-cell touch screen and apparatus of driving the same
AssigneeHimax Technologies Limited
InventorsYAW-GUANG CHANG, Wei-Song Wang
Life of this patent
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Abstract
An apparatus of driving an in-cell touch screen, a transmitter (TX) driving unit generates TX driving signals coupled to a common-voltage electrode substrate, and RX detection signals are then induced on an RX electrode substrate that is coupled to and detected by an RX detection unit. The voltage swing of the TX driving signal is determined according to current leakage in thin film transistor (TFT) unit cells of a liquid crystal module (LCM).
Claims14
Apparatus of driving an in-cell touch screen, which comprises a receiver (RX) electrode substrate and a liquid crystal module (LCM) having a common-voltage electrode substrate, the apparatus comprising:
- a transmitter (TX) driving unit configured to generate TX driving signals coupled to the common-voltage electrode substrate, RX detection signals being then induced on the RX electrode substrate that is coupled to and detected by an RX detection unit;
- wherein a voltage swing of the TX driving signal is determined according to current leakage in thin film transistor (TFT) unit cells of the LCM.
An in-cell touch screen, comprising:
- a common-voltage electrode substrate associated with a liquid crystal module (LCM);
- a transmitter (TX) driving unit configured to generate TX driving signals coupled to the common-voltage electrode substrate;
- a receiver (RX) electrode substrate, on which RX detection signals being then induced due to the TX driving signals;
- and
- an RX detection unit configured to detect the RX detection signals;
- wherein a voltage swing of the TX driving signal is determined according to current leakage in thin film transistor (TFT) unit cells of the LCM.
Dependencies are inferred from the claim text.