Hewlett-packard Development Company, L.p.

Joseph W Stellbrink

Eric L Ahlvin

Peter James Fricke

Alan R Arthur

Joseph R Elliot

Huanzhao Zeng

Pierre Joseph Kaiser

Tim R Koch

Kevin D O'Hara

Craig D Sunada

William E Lewey

Daniel Fradl

Timothy Jay Bouma

Whitney Elaine Loper

April E Sullivan

Ryan Newman

In some examples, classification based printing material set selection may include analyzing a preliminary rendering of print data. Classification based printing material set selection may further include generating raster data based at least in part on a further rendering of the print data, and generating further print data including the raster data.

Classification based printing material set selection

Expansion effects of moisture on media resulting from ejection of fluid by the fluid-ejection device onto the media within a print zone in accordance with a portion of a print job are inferred. In response to inferring the expansion effects of moisture on the media, an action is performed to counteract the expansion effects of moisture on the media.

Counteracting expansion effects of moisture on media within fluid-ejection device

In an implementation, conversion of K-only data from a source CMYK color space to a destination CMYK color space is managed. The destination CMYK color space is transformed to a virtual RGB color space, in which a neutral axis of the virtual RGB color space is set to be mapped to destination K-only output colors in a color separation table for mapping of source K-only grays to destination K-only grays. The source CMYK color space is converted to a device independent color space and the conversion is adjusted such that the source K-only grays are forced to have the same chrominance as the neutral axis of the virtual RGB color space in the color separation table. The LUT is generated to include a K-only mapping by combining the virtual RGB color space with the adjusted conversion of the source K-only grays.

Conversion of K-only data from a source to a destination color space

A display element () corresponds to a pixel of a display. The display element includes a top electrode () connected to a first addressable line of the display, and a bottom electrode () connected to a second addressable line of the display. The display element includes a display mechanism () situated between the top electrode and the bottom electrode and having a number of individually turned-on steps. Each individually turned-on step has a turn-on voltage threshold at which the step is turned on upon a voltage applied between the top and the bottom electrodes equal to or greater than the turn-on voltage threshold. Each individually turned-on step has a turn-off voltage threshold at which the step is turned off upon a voltage applied between the top and the bottom electrodes equal to or less than the turn-off voltage threshold.

Display element having groups of individually turned-on steps

An image rendering method for masking a visual defect is disclosed. In an embodiment, the method includes determining a location of the visual defect, identifying a plurality of sub-pixels neighboring the visual defect and utilizing contrast sensitivity functions and visual masking characteristics of a human visual system to optimize adjustments to the plurality of neighboring sub-pixels to mask the visual defect.

Masking a visual defect

A color display including: a stacked plurality of color layers, each layer being selectively reflective or absorptive of light in a different portion of the human visible spectrum; wherein, the layers are each configured as a plurality of independently addressable picture elements, at least some of the picture elements in at least one of the layers are superimposed in the stack over at least some picture elements in at least one other of the layers, and a resolution of the superimposed picture elements in the at least one of the layers is different from the resolution of the superimposed picture elements in the at least one other of the layers.

Color display having layer dependent spatial resolution and related method

In one embodiment, an ink cartridge for inkjet printing includes a housing enclosing four separate chambers for holding ink and a printhead affixed to the housing and operatively connected to each of the four ink chambers.

Multiple chamber ink cartridge

In one embodiment, a reservoir for holding a fluid includes a housing defining an enclosed chamber, the housing having a first opening therein at one part of the chamber and a second opening therein at a second part of the chamber above the first part of the chamber, a breachable seal sealing the second opening, and a circuitous tunnel exposing the chamber to the atmosphere through the second opening if the seal is breached.

Breachable seal

A fluid supply media includes a material having pores and a lamellae inhibiting agent retained relative to the material proximate to the pores.

Fluid supply media

An inkjet consumable cartridge having an inkjet cartridge having nozzles. The inkjet consumable cartridge also has an inkjet cartridge holding device for holding the inkjet cartridge, a cap configured to interface with the inkjet cartridge, and a cap actuator that, when actuated, moves the cap from a position where the cap does not interface with the inkjet cartridge to a position where the cap interfaces with the inkjet cartridge sealingly covering the nozzles. Furthermore, the consumable cartridge is removable from a printer as a self-contained unit.

Growing community of inventors

Corvallis, OR, United States of America

Joseph W Stellbrink