Patents by Inventor Daniel Richard Klemer
Daniel Richard Klemer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7859733Abstract: A scanning apparatus for a printer or similar instrument. A multiharmonic oscillator is used to provide a composite motion of a laser beam or other light beam to scan an imaging surface. The multiharmonic oscillator may have multiple sections each having a different resonant frequency. One section includes a reflector that intercepts the light beam, and drive electronics move the reflector so the light beam scans the imaging surface. Linear and complex non-linear motions of the light beam may be achieved. Microelectromechanical systems (MEMS) technology may be used to fabricate the oscillator.Type: GrantFiled: July 20, 2009Date of Patent: December 28, 2010Assignee: Lexmark International, IncInventors: Roger Steven Cannon, Daniel Richard Klemer
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Patent number: 7643525Abstract: A laser driver comprises a plurality of current sources, including at least one bias current source and at least two drive current sources. To control the laser driver, a set of operating states is defined where each operating state corresponds to a desired laser output power level and a ratio is defined that establishes a relationship between a first desired laser output and a second desired laser output. A calibration operation samples laser output power of the laser source for less than all of the operating states, computes adjustments to the current levels of the current sources based at least in part upon the ratio such that sampled laser power levels converge towards their corresponding desired laser output level. The current sources are adjusted to their corresponding computed current levels.Type: GrantFiled: October 31, 2007Date of Patent: January 5, 2010Assignee: Lexmark International, Inc.Inventors: Philip Jerome Heink, Daniel Richard Klemer, Stanley Coy Tungate, Jr., Eric Wayne Westerfield
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Publication number: 20090279155Abstract: A scanning apparatus for a printer or similar instrument. A multiharmonic oscillator is used to provide a composite motion of a laser beam or other light beam to scan an imaging surface. The multiharmonic oscillator may have multiple sections each having a different resonant frequency. One section includes a reflector that intercepts the light beam, and drive electronics move the reflector so the light beam scans the imaging surface. Linear and complex non-linear motions of the light beam may be achieved. Microelectromechanical systems (MEMS) technology may be used to fabricate the oscillator.Type: ApplicationFiled: July 20, 2009Publication date: November 12, 2009Applicant: Lexmark International, Inc.Inventors: Roger Steven Cannon, Daniel Richard Klemer
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Patent number: 7573625Abstract: A scanning apparatus for a printer or similar instrument. A multiharmonic oscillator is used to provide a composite motion of a laser beam or other light beam to scan an imaging surface. The multiharmonic oscillator may have multiple sections each having a different resonant frequency. One section includes a reflector that intercepts the light beam, and drive electronics move the reflector so the light beam scans the imaging surface. Linear and complex non-linear motions of the light beam may be achieved. Microelectromechanical systems (MEMS) technology may be used to fabricate the oscillator.Type: GrantFiled: July 7, 2005Date of Patent: August 11, 2009Assignee: Lexmark International, Inc.Inventors: Roger Steven Cannon, Daniel Richard Klemer
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Publication number: 20090138746Abstract: Pulse width modulation signals are generated by identifying an event table having a plurality of events, each event including a time to next event parameter. Each desired pulse width modulation signal is characterized by a first event designating a transition from a first state to a second state and a second event designating a transition from the second state back to the first state. An event pointer is set to select a current event and the event table is repeatedly cycled through by updating the output for at least each pulse width modulation signal associated with the current event having a designated state transition, detecting that a time period has lapsed corresponding to the time to next event parameter associated with the current event, incrementing the event pointer to point to a next event in the event table and conveying each pulse width modulation signal to a corresponding circuit.Type: ApplicationFiled: November 28, 2007Publication date: May 28, 2009Inventor: Daniel Richard Klemer
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Publication number: 20090110015Abstract: A laser driver comprises a plurality of current sources, including at least one bias current source and at least two drive current sources. To control the laser driver, a set of operating states is defined where each operating state corresponds to a desired laser output power level and a ratio is defined that establishes a relationship between a first desired laser output and a second desired laser output. A calibration operation samples laser output power of the laser source for less than all of the operating states, computes adjustments to the current levels of the current sources based at least in part upon the ratio such that sampled laser power levels converge towards their corresponding desired laser output level. The current sources are adjusted to their corresponding computed current levels.Type: ApplicationFiled: October 31, 2007Publication date: April 30, 2009Inventors: Philip Jerome Heink, Daniel Richard Klemer, Stanley Coy Tungate, JR., Eric Wayne Westerfield
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Patent number: 7403215Abstract: Laser driver systems and methods are provided for controlling a laser driver coupled to a suitable laser source. The laser driver comprises a plurality of current sources, including at least one bias current source and at least two switched current sources. To control the laser driver, a laser power control signal is provided for each switched current source that corresponds to a desired laser output power. An output power error measure is defined based upon an error between a measured laser output power and the desired laser output power for each switched current source and a control system is characterized in which the output power error measures combine to change a magnitude of each of the switched current sources and the bias current source(s) such that the output power error measures converge over time.Type: GrantFiled: August 22, 2006Date of Patent: July 22, 2008Assignee: Lexmark International, Inc.Inventors: Philip Jerome Heink, Daniel Richard Klemer, Stanley Coy Tungate, Jr., Eric Wayne Westerfield
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Patent number: 7400661Abstract: Threshold current may be determined and one or more bias sources may be programmed in a laser drive circuit. For example, a laser diode emits light along first and second optical paths. A polarizer is positioned in the first optical path between the laser diode and a first detector, which outputs a first detector signal corresponding to the measured optical power of polarized light. A second detector monitors light along the second optical path and provides a second detector signal. A bias compensation circuit receives the first and second detector signals and provides a bias current control signal, which is utilized to program a bias current source supplied to the laser diode. Additionally, multiple polarizer devices may be utilized e.g., a first polarizer in a first optical path aligned with the laser beam and a second polarizer in a second optical path aligned substantially orthogonal to the polarization of the laser beam.Type: GrantFiled: November 8, 2006Date of Patent: July 15, 2008Assignee: Lexmark International, Inc.Inventors: Roger Steven Cannon, Daniel Richard Klemer
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Publication number: 20080123702Abstract: Threshold current may be determined and one or more bias sources may be programmed in a laser drive circuit. For example, a laser diode emits light along first and second optical paths. A polarizer is positioned in the first optical path between the laser diode and a first detector, which outputs a first detector signal corresponding to the measured optical power of polarized light. A second detector monitors light along the second optical path and provides a second detector signal. A bias compensation circuit receives the first and second detector signals and provides a bias current control signal, which is utilized to program a bias current source supplied to the laser diode. Additionally, multiple polarizer devices may be utilized e.g., a first polarizer in a first optical path aligned with the laser beam and a second polarizer in a second optical path aligned substantially orthogonal to the polarization of the laser beam.Type: ApplicationFiled: November 8, 2006Publication date: May 29, 2008Inventors: Roger Steven Cannon, Daniel Richard Klemer
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Publication number: 20080049093Abstract: Laser driver systems and methods are provided for controlling a laser driver coupled to a suitable laser source. The laser driver comprises a plurality of current sources, including at least one bias current source and at least two switched current sources. To control the laser driver, a laser power control signal is provided for each switched current source that corresponds to a desired laser output power. An output power error measure is defined based upon an error between a measured laser output power and the desired laser output power for each switched current source and a control system is characterized in which the output power error measures combine to change a magnitude of each of the switched current sources and the bias current source(s) such that the output power error measures converge over time.Type: ApplicationFiled: August 22, 2006Publication date: February 28, 2008Inventors: Philip Jerome Heink, Daniel Richard Klemer, Stanley Coy Tungate, Eric Wayne Westerfield
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Patent number: D752245Type: GrantFiled: April 30, 2014Date of Patent: March 22, 2016Inventor: Daniel Richard Klemer