Touch display device, touch driving circuit, touch controller, and touch sensing method

A touch display device comprising:

• a touch panel in which a plurality of touch electrodes are arranged;
• a touch controller that outputs a first master signal to a first master pin corresponding to one end of a first interface, outputs one or more second master signals other than the first master signal to a second master pin corresponding to one end of a second interface, receives first slave data from the first master pin, and receives second slave data from the second master pin;
• and
• a touch driving circuit that receives the first master signal from a first slave pin corresponding to another end of the first interface, receives the second master signal from a second slave pin corresponding to another end of the second interface, and outputs the first slave data to the first slave pin and outputs the second slave data to the second slave pin in response to the first master signal and the second master signal.

A touch controller that performs a master-slave operation with a touch driving circuit, the touch controller comprising:

• a first master pin that corresponds to a first interface;
• a second master pin that corresponds to a second interface;
• and
• a master input/output circuit that outputs first pen position information to the touch driving circuit via the first master pin, outputs second pen position information different from the first pen position information to the touch driving circuit via the second master pin, and receives first sensing data out of sensing data, which is generated as a result of sensing a pen signal using touch electrodes arranged in one or more local areas in a touch panel which are indicated by the first pen position information and the second pen position information by the touch driving circuit, from the touch driving circuit via the first master pin.

A touch driving circuit, comprising:

• a first slave pin that corresponds to a second end out of a first end and the second end of a first interface;
• a second slave pin that corresponds to a second end out of a first end and the second end of a second interface;
• and
• a slave input/output circuit that receives first pen position information from a touch controller via the first slave pin, receives second pen position information different from the first pen position information from the touch controller via the second slave pin, senses a pen signal using touch electrodes which are arranged in one or more local areas in a touch panel indicated by the first pen position information and the second pen position information, and outputs first sensing data out of sensing data generated as a result of sensing to the touch controller via the first slave pin.

A touch sensing method usable in a touch display device including a touch controller and a touch driving circuit that perform a master-slave operation, the touch sensing method comprising:

• causing the touch controller to transmit one or more pieces of first pen position information to the touch driving circuit via a first interface and to transmit one or more pieces of second pen position information other than the one or more pieces of first pen position information to the touch driving circuit via a second interface;
• causing the touch driving circuit to sense a pen signal using touch electrodes which are arranged in one or more local areas in a touch panel indicated by the one or more pieces of first pen position information and the one or more pieces of second pen position information received via the first interface and the second interface;
• causing the touch driving circuit to transmit sensing data to the touch controller via one or more of the first interface and the second interface as a result of sensing;
• and
• causing the touch controller to sense one or more pen touches based on the sensing data received via the one or more of the first interface and the second interface.