公开(公告)号：US11301086B2

公开(公告)日：2022-04-12

申请号：US16449654

申请日：2019-06-24

Applicant: FUTABA CORPORATION

Inventor： Takashi Muguruma ,  Terukazu Sugimoto ,  Katsumi Takayama ,  Hiroyuki Tanaka

IPC: G06F3/041 ,  G06F3/044

Abstract: A touch panel driving device is provided for sequentially performing a scanning of selecting a pair of transmission signal lines from N number of transmission signal lines and a pair of reception signal lines from M number of reception signal lines. The touch panel driving device includes a reception circuit for respectively receiving, from the pair of reception signal lines, reception signals whose waveforms are changed due to a capacitance change caused by a touch operation and for generating a detection value for detecting the touch operation by comparing the received reception signals, and a plurality of noise filters provided in signal paths from the M number of reception signal lines to the reception circuit for performing a filtering operation of the same filtering characteristics on each of the reception signals supplied to the reception circuit from the pair of reception signal lines.

公开(公告)号：US10592058B2

公开(公告)日：2020-03-17

申请号：US16254689

申请日：2019-01-23

Applicant: Futaba Corporation

Inventor： Terukazu Sugimoto ,  Takashi Muguruma ,  Hiroyuki Tanaka ,  Katsumi Takayama ,  Cheng-Che Ho ,  Fumikazu Omoto

IPC: G06F3/044 ,  G06F3/041

Abstract: A touch panel driving device, for sequentially performing scanning for selecting a pair of adjacent transmission signal lines and a pair of adjacent reception signal lines on a touch panel, includes a reception circuit configured to receive reception signals whose waveforms are changed by a capacitance change caused by an operation from the pair of reception signal lines of the touch panel and generate a detection value for monitoring a touch panel operation. The reception circuit generates the detection value by comparing levels of the reception signals from the reception signal lines while sequentially switching capacitance values of a measurement capacitance unit connected to one of the reception signal lines. The measurement capacitance unit includes capacitance units each forming a certain capacitance value by parallel connection or series connection of capacitors as a capacitance unit forming one capacitance value used for switching the capacitance value of the measurement capacitance unit.

公开(公告)号：US09666138B2

公开(公告)日：2017-05-30

申请号：US14568175

申请日：2014-12-12

Applicant: FUTABA CORPORATION

Inventor： Takashi Muguruma ,  Terukazu Sugimoto ,  Keisuke Kawana ,  Yukio Kamiyama ,  Kazuhiro Iwata

IPC: G09G3/30 ,  G09G3/3283 ,  G09G3/36 ,  G09G3/3216 ,  G09G3/3275 ,  G09G3/10

CPC classification number: G09G3/3283 ,  G09G3/3216 ,  G09G3/3275 ,  G09G3/3685 ,  G09G2300/0426 ,  G09G2310/0243 ,  G09G2310/0272 ,  G09G2310/0291

Abstract: A display driving device performs display drive based on display data with respect to a display unit including pixels arranged at respective intersections of data lines and scanning lines. The device includes: a current setting unit configured to store current gradation values which are set for the respective scanning lines that constitute a frame of the display data; a current gradation control unit configured to, at each of scan timings for the respective scanning lines within one frame, generate a constant current corresponding to a current gradation value for a corresponding scanning line among the current gradation values stored in the current setting unit; and a data line driving unit configured to supply the constant current generated by the current gradation control unit to the respective data lines for time periods corresponding to pixel gradation values defined by the display data.