Liquid jet driving device and liquid jet driving method
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsHiroyuki Nakagawa, Hiroshi Fukumoto, Jyunichi Aizawa, Yasuhiko Ozaki
Life of this patent
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Abstract
At a dot cycle (T3), a dummy burst signal as well as a jet burst signal are supplied for a vibration exciter to drive it so that the vibration exciter can provide liquid with a periodic radiation pressure. The dummy burst signal is so determined as to jet no droplet, with a smaller number of pulses and so on. That allows a stable motion of meniscus of ink and it is thereby possible to stably jet the droplets. With this control provided is a technique to improve a shape of an ink surface from which the droplets are created and stably jet the droplets when a liquid jet unit for jetting the droplets from a liquid surface is driven.
Claims20
A liquid jet driving device, comprising:
- a liquid jet unit having a jet surface provided with an opening to limitedly expose a surface of a liquid to be jetted out and a vibration exciter provided on an opposite side to said jet surface with said liquid interposed therebetween for providing said liquid with vibration;
- and
- a driving unit configured to provide said vibration exciter with a suppressing signal and a jet burst signal which includes a pulse train of a first frequency to drive said vibration exciter,
- wherein vibration provided for said liquid by said vibration exciter which is driven with said jet burst signal jets said liquid from said jet surface and vibration provided for said liquid by said vibration exciter which is driven with said suppressing signal suppresses free vibrations on the surface of said liquid without jetting said liquid from said jet surface.
A liquid jet driving device, comprising:
- a liquid jet unit having a jet surface provided with an opening to limitedly expose a surface of a liquid to be jetted out and a vibration exciter provided on an opposite side to said jet surface with said liquid interposed therebetween configured to provide said liquid with vibration;
- a driving unit configured to provide said vibration exciter with a jet burst signal which includes a pulse train of a predetermined frequency to drive said vibration exciter;
- and
- a hydrostatic pressure applying mechanism configured to apply a controllable hydrostatic pressure to said liquid.
A method of driving a liquid jet, comprising the steps of:
- supplying a jet burst signal which includes a pulse train of a first frequency to provide a liquid with a vibration to jet said liquid from a jet surface;
- and
- supplying a suppressing signal to provide said liquid with a vibration to suppress free vibrations on the jet surface of said liquid without jetting said liquid from said jet surface.
Dependencies are inferred from the claim text.