摘要:
A printhead IC comprising: an array of nozzles; and, drive circuitry for receiving print data and sending drive pulses to the nozzles in accordance with the print data; wherein, the drive pulses consist of ejection pulses with sufficient energy to eject printing fluid from the nozzles designated to fire at that time, and sub-ejection pulses with insufficient energy to eject printing fluid from the nozzles not designated to fire at that time.
摘要:
A printhead is provided which has a plurality of rows of print nozzles. Each row has first and second drive circuitry for each nozzle respectively positioned at opposite sides of each nozzle with respect to the row. The respective positions of the first and second circuitry of each nozzle of each row are rotated 180 degrees relative to the respective positions of the first and second circuitry of each nozzle in each adjacent row.
摘要:
A printhead integrated circuit including a MEMS layer having a plurality of nozzle assemblies and a CMOS layer having control circuitry. Each nozzle assembly includes a heater element for ejecting ink and sensing a temperature of the nozzle assembly. The control circuitry modifies operation of the heater elements in response to a sensed temperature exceeding a predetermined threshold.
摘要:
An information gathering and decoding apparatus includes two information gathering devices that communicate with one another, preferably wirelessly. The two information gathering devices may be used substantially simultaneously to process one, or multiple, customer orders. Customer order information is sent from one information gathering device to the other, and only one of the information gathering devices communicates with a computer system to send information from both of the information gathering devices to the computer system as if the information originated from the one information gathering device. Communication between the two information gathering devices combined with a microprocessor in at least one of the information gathering devices may allow the information gathering and decoding apparatus to be used with existing computer systems, such as point of sale systems, preferably without modifying the computer system. One information gathering device may pre-qualify customers to purchase restricted items. The second information gathering device may access the pre-qualification from the first information gathering device to process sales of restricted items to customers.
摘要:
A print engine controller for a pagewidth inkjet printhead having a plurality of abutting printhead modules mounted on a carrier. The print engine controller is configured to: (a) receive data identifying a rotational yaw displacement of an erroneously displaced printhead module; (b) determine a correction factor that compensates for ink dot displacement by nozzles in the erroneously displaced printhead module; (c) use the correction factor to determine an accumulative Y-offset for each printhead module in the printhead; and (d) alter the output of the ink dots from nozzles in each printhead module having a non-zero accumulative Y-offset to compensate for the rotational yaw displacement of the erroneously displaced printhead module.
摘要:
A printhead module comprising at least first and second rows configured to print ink of a similar type or color, at least some nozzles in the first row being aligned with respective corresponding nozzles in the second row in a direction of intended media travel relative to the printhead, the printhead module being configurable such that the nozzles in the first and second rows are fired such that some dots output to print media are printed to by nozzles from the first row and at least some other dots output to print media are printed to by nozzles from the second row.
摘要:
A printhead IC is provided having an array of ejection nozzles, sensing circuitry for sensing a temperature of the nozzle array which is de-activatable after a period of use, and drive circuitry for receiving print data and providing drive pulses to the nozzles to cause ejection in accordance with the print data. The drive circuitry is configured to set the duration of the drive pulses to a sub-ejection value for any nozzle which is not to eject in accordance with the print data.
摘要:
A printhead IC is provided which has an array of nozzles, drive circuitry for receiving print data and sending drive pulses of electrical energy to the array of nozzles in accordance with the print data, and a temperature sensor connected to the drive circuitry to adjust the drive pulse profile in response to the temperature sensor output. During use, the temperature sensor can be de-activated after a period of use. The drive circuitry sets the duration of the pulse profile to a sub ejection value for any of the nozzles in the row that are not to eject a drop during that firing sequence.
摘要:
A printhead IC is provided having an array of nozzles, drive circuitry for receiving print data and sending drive pulses of electrical energy to the array of nozzles in accordance with the print data, and a temperature sensor connected to the drive circuitry to adjust the drive pulse profile in response to the temperature sensor output. During use, the temperature sensor can be de-activated after a period of use. The drive circuitry is programmed with a series of temperature thresholds defining a set of temperature zones, each of the zones having a different pulse profile for the drive pulses sent to the nozzles in the region currently operating in that temperature zone.
摘要:
A print engine is provided having printhead modules and a controller. Each printhead module has a plurality of ejection nozzles. The nozzles of at least one of the printhead modules is rotationally displaced relative to the other printhead modules. The controller communicates ejection data to the ejection nozzles in accordance with a cumulative correction factor for each printhead module, including printhead modules having non-rotationally displaced nozzles, to at least partially compensate for the rotational displacement.