Patent ID: 6059394
Filing Date: 2000-05-09
Classification: B41J

Abstract:
A driving method for an ink jet recording head having an electric converting element provided to vary a volume of an ink path through which an ink flows to perform a gradient recording in accordance with a recording information, the electric converting element being driven by applying electric signals including a first driving pulse for enlarging the volume of the ink path, the first driving Pulse having a duration t1, and a second driving pulse for reducing the volume of the ink path, the second driving pulse having a duration t2, said method comprising the steps of:selecting the duration t2 of the second driving pulse and a voltage of the second driving pulse corresponding to the recording information;inputting an input pulse representing a reference timing for beginning driving of the electric converting element;delaying a start of the first driving pulse after the input pulse until a first time period corresponding to the duration t2 passes; anddelaying a start of the second driving pulse after the input pulse until a second predetermined time period corresponding to a sum of t1 and t2 passes.