Touch display device, touch system, touch driving circuit, pen, and pen sensing method

A touch display device comprising:

• a touch panel including a plurality of touch electrodes;
• and
• a touch circuit including one or more touch driving circuits supplying a touch driving signal to the touch panel and receiving a touch sensing signal from the touch panel,
• wherein the one or more touch driving circuit includes:
• a driving unit supplying an uplink signal to more than one of a plurality of touch electrodes included in a touch panel;
• and
• a sensing unit generating and outputting sensing data when a first downlink signal output from a tip of a pen and a second downlink signal output from a ring of the pen are received through the more than one of the plurality of touch electrodes,
• wherein, when the pen is tilted to reach a predetermined angle with respect to a surface of the touch panel, the touch electrode receiving a maximum value of received signal strength for each touch electrode for the first downlink signal and the touch electrode receiving a maximum value of received signal strength for each touch electrode for the second downlink signal are different from each other,
• wherein the one or more touch driving circuits supplying the touch driving signal and the receiving a touch sensing signal are performed during one or more touch driving periods in a driving timing,
• wherein the one or more touch driving periods for touch driving and one or more display driving periods for display driving are alternately assigned in a time-division manner or independently defined in an independent manner, and
• wherein, when the touch display device is driven in the time-division manner, the one or more touch driving periods are blank periods during which the display driving is not performed, or when the touch display device is driven in the independent manner, the display driving and the touch driving are simultaneously performed.

A pen comprising:

• a housing;
• a tip protruding to an outside of the housing;
• a ring provided inside the housing and having a shape enclosing an inner side surface of the housing;
• and
• a pen driving circuit provided inside the housing, electrically connected to one or more of the tip and the ring, and to output a downlink signal through the one or more of the tip and the ring connection to a touch display device,
• wherein the pen driving circuit drives the tip and the ring during one or more touch driving periods in a driving timing,
• wherein the one or more touch driving periods for touch driving and one or more display driving periods for display driving are alternately assigned in a time-division manner or independently defined in an independent manner, and
• wherein, when the touch display device is driven in the time-division manner, the one or more touch driving periods are blank periods during which the display driving is not performed, or when the touch display device is driven in the independent manner, the display driving and the touch driving are simultaneously performed.

A pen sensing method comprising:

• supplying an uplink signal to one or more touch electrode of a plurality of touch electrodes included in a touch display device;
• receiving a first downlink signal and a second downlink signal output from a pen through the one or more touch electrode of the plurality of touch electrodes;
• and
• sensing pen coordinates and/or a pen tilt of the pen based on received signal strength for each touch electrode for the first downlink signal and received signal strength for each touch electrode for the second downlink signal,
• wherein the first downlink signal and the second downlink signal are received during different periods or during the same period,
• wherein the supplying the uplink signal and the receiving the first and second downlink signals are performed during one or more touch driving periods in a driving timing,
• wherein the one or more touch driving periods for touch driving and one or more display driving periods for display driving are alternately assigned in a time-division manner or independently defined in an independent manner, and
• wherein, when the touch display device is driven in the time-division manner, the one or more touch driving periods are blank periods during which the display driving is not performed, or when the touch display device is driven in an independent manner, the display driving and the touch driving are simultaneously performed.

A touch system comprising:

• a touch display device including a touch panel having a plurality of touch electrodes, and a touch circuit for supplying an uplink signal to one or more touch electrode of the plurality of touch electrodes and receiving a downlink signal through the one or more touch electrode of the plurality of touch electrodes;
• and
• a pen receiving the uplink signal and outputting the downlink signal,
• wherein the touch circuit receives a first downlink signal and a second downlink signal output from the pen through the one or more touch electrode of the plurality of touch electrodes, and
• senses the pen based on received signal strength for each touch electrode for the first downlink signal and received signal strength for each touch electrode for the second downlink signal, and
• when the pen is tilted to reach a predetermined angle with respect to a surface of the touch panel, the touch electrode receiving a maximum value of received signal strength for each touch electrode for the first downlink signal and the touch electrode receiving a maximum value of received signal strength for each touch electrode for the second downlink signal are different from each other,
• wherein the touch circuit for supplying an uplink signal and the pen receiving the uplink signal and outputting the downlink signal are performed during one or more touch driving periods in a driving timing,
• wherein the one or more touch driving periods for touch driving and one or more display driving periods for display driving are alternately assigned in a time-division manner or independently defined in an independent manner, and
• wherein, when the touch display device is driven in the time-division manner, the one or more touch driving periods are blank periods during which the display driving is not performed or when the touch display device is driven in the independent manner, the display driving and the touch driving are simultaneously performed.