A method in a system including an active stylus and a display controller that detects the active stylus and that drives a display device, the method comprising: transmitting, by the display controller, an uplink signal, wherein the uplink signal includes timing information, receiving, by the active stylus, the uplink signal, transmitting, by the active stylus, a first packet (Pm) including a plurality of bit values during a first display frame (Fk), wherein the first packet (Pm) is transmitted in a first transmission period indicated by the timing information and the first display frame (Fk) has a time length from a timing at which the active stylus receives the uplink signal; retransmitting, by the active stylus, the first packet (Pm+) including the plurality of bit values during the first display frame (Fk) in a second transmission period, such that the stylus transmits two packets of a same substance within the same first display frame (Fk); driving, by the display controller, the display device to display a first part of a plurality of pixel data configuring the first display frame (Fk) during a first display driving period; receiving, by the display controller, the first packet (Pm) during a blanking period following the first display driving period, wherein the blanking period is a period in which driving operation of pixels is not performed, wherein - the first packet (Pm) received by the receiving is transmitted by the transmitting, and the blanking period is disposed in the first transmission period of the first packet (Pm), or - the first packet (Pm+) received by the receiving is transmitted by the retransmitting, and the blanking period is disposed in the second transmission period of the first packet (Pm+); and driving, by the display controller, the display device to display a second part of the plurality of pixel data configuring the first display frame (Fk) during a second display driving period following the blanking period, the first part of the plurality of pixel data being different from the second part of the plurality of pixel data, wherein said retransmitting, by the active stylus, the first packet (Pm+) including the plurality of bit values during the first display frame (Fk) is performed immediately after said transmitting. transmitting, by the display controller, an uplink signal, wherein the uplink signal includes timing information, receiving, by the active stylus, the uplink signal, transmitting, by the active stylus, a first packet (Pm) including a plurality of bit values during a first display frame (Fk), wherein the first packet (Pm) is transmitted in a first transmission period indicated by the timing information and the first display frame (Fk) has a time length from a timing at which the active stylus receives the uplink signal; retransmitting, by the active stylus, the first packet (Pm+) including the plurality of bit values during the first display frame (Fk) in a second transmission period, such that the stylus transmits two packets of a same substance within the same first display frame (Fk); driving, by the display controller, the display device to display a first part of a plurality of pixel data configuring the first display frame (Fk) during a first display driving period; receiving, by the display controller, the first packet (Pm) during a blanking period following the first display driving period, wherein the blanking period is a period in which driving operation of pixels is not performed, wherein - the first packet (Pm) received by the receiving is transmitted by the transmitting, and the blanking period is disposed in the first transmission period of the first packet (Pm), or - the first packet (Pm+) received by the receiving is transmitted by the retransmitting, and the blanking period is disposed in the second transmission period of the first packet (Pm+); and - the first packet (Pm) received by the receiving is transmitted by the transmitting, and the blanking period is disposed in the first transmission period of the first packet (Pm), or - the first packet (Pm+) received by the receiving is transmitted by the retransmitting, and the blanking period is disposed in the second transmission period of the first packet (Pm+); and driving, by the display controller, the display device to display a second part of the plurality of pixel data configuring the first display frame (Fk) during a second display driving period following the blanking period, the first part of the plurality of pixel data being different from the second part of the plurality of pixel data, wherein said retransmitting, by the active stylus, the first packet (Pm+) including the plurality of bit values during the first display frame (Fk) is performed immediately after said transmitting.