Futaba Corporation

Takashi Muguruma

Terukazu Sugimoto

Katsumi Takayama

Hiroyuki Tanaka

Keisuke Kawana

Fumikazu Omoto

Yukio Kamiyama

Kazuhiro Iwata

Cheng-Che Ho

Tadayoshi Umetsu

Toshihiro Nishioka

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.

Touch panel driving device, touch panel device, touch panel driving method

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.

Touch panel driving device and touch panel device

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.

Display driving method to drive a display based on display data with respect to a display unit including pixel arranged at data and scan line intersections, and corresponding display driving device and display apparatus

In a Q-tuple anode matrix vacuum fluorescent display (VFD), a plurality of selected pixels are turned on one by one to sequentially emit lights in accordance with a display signal. Each selected pixel is selected from Q anode segments to be turned on to emit lights by turning on a first and a second grid electrode positioned adjacent to each other. Each selected pixel is formed of Q/2 anode segments in total including R anode segments sequentially disposed from a position closest to the first grid electrode and facing the second grid electrode and (Q/2&#x2212;R) anode segments sequentially disposed from a position closest to the second grid electrode and facing the first grid electrode, R being an integer ranging from 1 to (Q/2&#x2212;1).

Multiple anode matrix vacuum fluorescent display, and driving circuit and driving method thereof

Growing community of inventors

Mobara, Japan

Takashi Muguruma