| 摘要 |
An apparatus and method provides a means for assembling a print head apparatus for an ink jet printer. The apparatus comprises control means for controlling the flow of fluid to the droplet generator and for controlling transfer of data to the droplet charging and collecting means. The control means for controlling transfer of data to the droplet charging and collecting means is a motherboard containing various elements. The motherboard includes a microcontroller and fiber optic means for receiving data and control signals and providing the signals to an input buffer. A RAM provides data memory, and latch and shift register means latch and shift the data from the RAM. High voltage driver means receive data from the latch and shift register means. A control state machine communicates with the microcontroller, for handling generation of all control signals for the input buffer, the RAM, and the latch and shift register means. Finally, opto couplers buffer the low voltage circuitry from high voltage circuitry in the print head apparatus. The print head apparatus is capable of providing diagnostic functions, and is self-contained in a field-replaceable housing. <IMAGE> |
