Touch panel controller, integrated circuit, touch panel device, and electronic device

摘要

A touch panel controller (1A) includes: a capacitor drive portion (5A); a multiplying portion (2A) which performs multiplication of first linear sum signals by a second code sequence to obtain signals and then performs addition of the signals to generate a second linear sum signal; an inner product operation portion (3A) which generates a first inner product operation signal by calculating an inner product of the second linear sum signal and the second code sequence; an inner product operation portion (3AA) which generates a second inner product operation signal by calculating an inner product of the first inner product operation signal and the first code sequence. This makes it possible to reduce a mounting area of the touch panel controller.

主权项

1. A touch panel controller for controlling a touch panel including capacitors provided at respective intersections between M drive lines and N sense lines,
the touch panel controller comprising: a drive section which drives the M drive lines in parallel with each other on a basis of a first code sequence having K M-dimensional vectors to cause K first linear sum signals based on electric charges on the capacitors to be outputted through the N sense lines; a multiplying section which performs multiplication of the K first linear sum signals by a second code sequence having K N-dimensional vectors to obtain K signals and then performs addition of the K signals to generate a second linear sum signal; a first inner product operation section which generates a first inner product operation signal by calculating an inner product of the second linear sum signal and the second code sequence; and a second inner product operation section which generates a second inner product operation signal for estimating values on the capacitors, by calculating an inner product of the first inner product operation signal and the first code sequence.