Touch display and control method thereof, and touch display device and control method thereof

A touch display, wherein displaying of the touch display comprises a plurality of frame periods, each frame period comprises a frame blanking interval and an effective operation interval, the effective operation interval comprises a plurality of display refresh phases and a plurality of long horizontal blanking phases that are alternately arranged, the plurality of long horizontal blanking phases comprise a first long horizontal blanking phase to an mth long horizontal blanking phase, and m>2, wherein the plurality of display refresh phases comprise row scanning time periods of a plurality of rows of subpixels of the touch display;

• and in at least two frame periods, two corresponding long horizontal blanking phases are respectively located between row scanning time periods of two different adjacent rows of subpixels;
• and the touch display is configured to:
• transmit an uplink signal in the first long horizontal blanking phase;
• and receive a downlink signal from an active stylus in at least one long horizontal blanking phase of a second long horizontal blanking phase to an mth long horizontal blanking phase.

A touch display device, comprising an active stylus and a touch display, wherein:

• the touch display is configured to transmit an uplink signal in a first long horizontal blanking phase;
• the active stylus is configured to transmit at least one downlink signal in response to the uplink signal;
• and the touch display is further configured to receive the at least one downlink signal in at least one long horizontal blanking phase of a second long horizontal blanking phase to an mth long horizontal blanking phase, and wherein displaying of the touch display comprises a plurality of frame periods, and in at least two frame periods, two corresponding long horizontal blanking phases are respectively located between row scanning time periods of two different adjacent rows of subpixels of the touch display;
• wherein a plurality of display refresh phases comprise row scanning time periods of a plurality of rows of subpixels of the touch display.

A control method of a touch display device, wherein the touch display device comprises an active stylus and a touch display;

• and the control method comprises:
• transmitting, by the touch display in a first long horizontal blanking phase, an uplink signal;
• receiving, by the active stylus, the uplink signal;
• and transmitting, by the active stylus, a downlink signal in response to the uplink signal in at least one long horizontal blanking phase of a second long horizontal blanking phase to an mth long horizontal blanking phase, and m>2, wherein a plurality of display refresh phases comprise row scanning time periods of a plurality of rows of subpixels of the touch display;
• and in at least two frame periods, two corresponding long horizontal blanking phases are respectively located between row scanning time periods of two different adjacent rows of subpixels;
• and receiving, by the touch display, the downlink signal from the active stylus in at least one long horizontal blanking phase of a second long horizontal blanking phase to an mth long horizontal blanking phase.