Hewlett-packard Development Company, L.p.

Other

Hewlett-packard Company

Virginia K Capps

Douglas G Keithley

David G Bohan

Nanette C Jensen

Kenneth Kay Smith

Pratik Shah

Andrew P Chick

Dustin C Rosing

Stephen L Testardi

Hye Heon Jung

Kwangsung Park

Joseph Savola

Eun-Kyung Yun

KyongHwan Kim

ChangYeop Oh

Nanette Jensen

An iconographic control panel of an image forming apparatus is provided. The iconographic control panel includes a plurality of physical iconographic control buttons respectively corresponding to a plurality of functions of the image forming apparatus, each of the plurality of physical iconographic control buttons comprising at least one dedicated light emitting diode, and at least one processor to determine an availability of the plurality of functions of the image forming apparatus respectively corresponding to each of the plurality of physical iconographic control buttons, determine a functional state of the plurality of functions of the image forming apparatus determined to be available, and control an illumination of the at least one LED of each of the plurality of physical iconographic control buttons based on the availability of each function corresponding to each of the plurality of physical iconographic control buttons and the functional state of each function determined to be available.

Iconographic control panel of an image forming apparatus

A system and method are provided for determining a light output of a light emitting diode (LED) in a scanner. The system includes a processor circuit to execute current control logic to obtain an optimum light output from the LED. The current control logic repeatedly applies increasing or decreasing currents to the LED until a saturation point is identified. This may be accomplished, for example, by comparing two measures of the light output of the LED for two different currents applied to the LED. When a difference equaling a predetermined threshold between the two measures is detected, then the saturation point is identified.

System and method for determining light source current

A method and system of selectively and securely enabling an added or premium functionality in a printer can be created by transmitting or inputting to the printer an electronic key correlated to the unique serial number stored in that printer. In this way, the key used to activate an added or premium functionality in a particular printer cannot be used to activate the same functionality in any other printer. This prevents the unauthorized activation of added or premium functions in other printers.

Method and system for securely and selectively providing optional features or premium functionality in a printer

A system and method are provided for calibrating an output from a sensor array in a scanner. The system comprises a processor circuit having a processor and a memory. Stored on the memory and executable by the processor is the scanner calibration logic. The scanner calibration logic comprises logic for determining a minimum dark value for the sensor array, and logic for determining an optimum exposure time of a number of light sources associated with the sensor array. The scanner calibration logic also includes logic for determining a maximum white value for the sensor array at the exposure time, and logic for setting an analog offset based upon the minimum dark value. The scanner calibration logic further comprises logic for setting an analog gain associated with the sensor array based on a sensor output range from the minimum dark value to a maximum white value.

System and method for scanner calibration

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Boise, ID, United States of America

Virginia K Capps