Patents Represented by Attorney, Agent or Law Firm William Pope
  • Pulse width modulation for correcting non-uniformity of acoustic inkjet printhead
    Patent number: 6299272
    Abstract: An acoustic inkjet printhead utilizes a pulse width modulation to control droplet size or ejection velocity. An individual control pulse controls the duration and the time a RF signal is applied to each transducer. To modify the RF signal of each transducer, the pulse width of each control signal can be modified according to a predetermined correction data. The rising edge of the control data is delayed according to the correction data while the falling edge is kept the same.
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: October 9, 2001
    Assignee: Xerox Corporation
    Inventors: Lamar T. Baker, Steven A. Buhler, Abdul M. Elhatem, Scott A. Elrod, Babur B. Hadimioglu, Jaime Lerma, Mostafa R. Yazdy