Abstract: This application provides a method and an apparatus for increasing a touch response speed. In this method, after a part of transmit channels are scanned, touch data obtained through scanning is immediately transmitted to an application processor. In addition, a subsequent transmit channel scanning process is performed while the touch data is transmitted, so that the transmit channel scanning process and the touch data transmission process are performed synchronously. After all transmit channels are scanned, a part of touch data obtained through the last scanning needs to be transmitted. Time required for transmitting a part of touch data is far less than time required for transmitting all touch data. Therefore, additional time required for transmitting data to the application processor is greatly reduced, so that time required for an entire touch response process is reduced, and a response speed of a touch operation is finally increased.

Abstract: This application provides a touch system control method and an electronic device. The method includes: in an active mode, controlling, by a touch chip, a touch panel to perform two-dimensional data scanning at a first frequency to obtain first scanned data; sending, by the touch chip, the first scanned data to a host at the first frequency; when the host determines, according to the first scanned data, that no valid touch signal is detected, switching, by the host, to an async idle mode, where in the async idle mode, the touch chip controls the touch panel to perform two-dimensional data scanning at the first frequency to obtain second scanned data, and sends the second scanned data to the host at a second frequency; the second frequency is less than the first frequency.

Abstract: This application provides a method for calculating position information in a touchscreen and an electronic device. In the method for calculating position information in a touchscreen, because a touch chip transmits, by using a high-speed serial bus, source data generated by a trigger operation, first duration t1 for the touch chip to transmit the source data generated by the trigger operation can be shorter. Because position information of the trigger operation in the touchscreen is calculated in a CPU, second duration t2 for the CPU to calculate coordinates of a position at which a user triggers the touchscreen can also be shorter.