Industrial Technology Research Institute

Hsiang-Pei Ou

Jane Huei-Chen Chang

Chieh-Yi Huang

Yu-Chu Huang

Jessen Chen

A piezoelectric fluid injection device and a driving voltage calibration method thereof. The piezoelectric fluid injection device includes at least one inkjet printhead comprising a plurality of nozzles, at least one voltage control element connecting to the inkjet printhead, a controller connecting to the voltage control element, a reference capacitor connecting to an auxiliary voltage control element and the controller in parallel with the inkjet printhead.

Piezoelectric fluid injection devices and driving voltage calibration methods thereof

A printer for receiving image data. The printer has a plurality of address lines, a plurality of bank lines, a plurality of control lines, and a plurality of print modules. Each print module is set corresponding to the address lines and the bank lines, each of the print modules has a plurality of print units, each print unit has a heating element and a switch unit coupled to the control lines for controlling the heating elements. When an address signal and a bank signal are applied by a predetermined address line and a predetermined bank line, and a plurality of control signals is transferred to the control lines, a switch unit is turned on according to the control signals for generating a driving current to activate the heating element of the switch unit.

Method and circuit for driving ink jet print head and printer utilizing same

A circuit and a method of estimating pulse frequencies of nozzles in an ink-jet head use a new mechanism of estimating pulse frequencies of nozzles instead of in a conventional counting mechanism. The circuit includes a DRAM, an adder and a method control mechanism. The method control mechanism controls the access method. The DRAM retrieves a plurality of pulse frequency parameters of nozzles after ink-jet cycle signals are received. The adder adds the parameters and weighted values to update pulse frequency parameters. The updated parameters are saved back to the DRAM.

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Taichung, Taiwan

Hsiang-Pei Ou