Hewlett-packard Development Company, L.p.

Helen Ann Holder

Ning Ge

Robert Ionescu

Jarrid Wittkopf

Anita Rogacs

Paul Howard Mazurkiewicz

Steven J Simske

Viktor Shkolnikov

Steven J Barcelo

Madhu Sudan Athreya

Ya-Ling Chang

Sandra G Goebel

Charles Santori

Tom J Searby

Robert G Walmsley

Peter Andrew Seiler

Raphael Gay

Mary G Baker

Gang Xu

Lei Liu

David George

Rongliang Zhou

Eric Faggin

Tyler Sims

Ya Ling Chang

Ralph A Morales

Terrance J OShea

Hafid Hamadene

William H Leong

Graphene printing is disclosed. A disclosed example graphene printing apparatus includes a gas source to cause a graphene precursor gas to flow across a surface of a substrate, and a localized heat source to locally heat portions of the surface to cause graphene to grow at the portions of the surface based on a printing pattern.

Graphene printing

An example device includes a main display panel that includes a main array of pixels and an opening within the main array of pixels. The example device further includes a beam splitter positioned to communicate light through the opening within the main array of pixels, a sensor positioned with respect to the beam splitter to capture light incident on the opening within the main array of pixels, and a subarray including a pixel. The subarray is positioned with respect to the beam splitter to output light through the opening within the main array of pixels.

Displays with pixels coupled by beam splitters

A computer device including an integrated input device is provided. The integrated input device includes a positive disconnect system including a display of an open connection to the integrated input device when the integrated input device is deactivated. The open connection comprises a visible metal trace on a line coupling the integrated input device to the computer device.

Positive disconnection of integrated input devices

In some examples, a fluidic conductive trace based radio-frequency identification device may include a flexible substrate layer including a channel, and a trace formed of a conductive fluid that is disposed substantially within the channel. The fluidic conductive trace based radio-frequency identification device may further include a sealing layer disposed on the flexible substrate layer and the trace to seal the conductive fluid in a liquid state within the channel.

Fluidic conductive trace based radio-frequency identification

In an example, an air filter system includes an air filter and a thermally conductive particulate sensor (TCPS). The TCPS includes a temperature sensor to measure a first temperature of the TCPS at a first time, measure a second temperature of the TCPS at a second time, and provide the measured first temperature and the measured second temperature to a controller. The controller to determine an actual rate of temperature change based on the measured first temperature and the measured second temperature, compare the actual rate of temperature change to a target rate of temperature change, and provide a notification when a difference between the actual rate of temperature change and the target rate of temperature change is greater than an accumulation threshold indicative of a threshold amount of particulate accumulation on the TCPS.

Thermally conductive particulate sensor

A device includes a P-N junction comprising a monolithic N-type semiconductor layer coupled to a monolithic P-type semiconductor layer. The monolithic N-type semiconductor layer includes a first portion and a second portion. The first portion has a first surface and the second portion has a second surface facing away from the first surface. The monolithic P-type semiconductor layer includes a third portion and a fourth portion. The third portion has a third surface and the fourth portion has a fourth surface facing away from the third surface.

P-type semiconductor layers coupled to N-type semiconductor layers

In an example implementation, a touch-sensitive illuminating display includes a transparent flexible touch layer, a transparent top conductive layer adjacent the flexible touch layer, a bottom conductive layer, and an electroluminescent layer and variable-thickness dielectric layer sandwiched between the top and bottom conductive layers. Pressure against the flexible touch layer is to reduce the dielectric layer thickness and bring the top and bottom conductive layers closer together, causing the electroluminescent layer to emit light where the pressure is applied.

Touch-sensitive illuminating display

One example of a device includes an antenna, a memristor code comparator, and a controller. The antenna is to receive a wake up signal. The memristor code comparator is to compare the wake up signal to a reference signal. The controller is to provide a trigger signal to wake up the device in response to the wake up signal matching the reference signal.

Memristor code comparator to compare wake up signals to reference signals

A device for detecting isotopes includes an isotope portion including a material including an isotope of an element, a reaction control portion to cause a chemical reaction of the material, and an electrical parameter portion to measure a change in an electrical parameter of the material, where the change in the electrical parameter is caused by the chemical reaction, and where the change in the electrical parameter is dependent on the isotope in the material, to detect the isotope by comparing the change in the electrical parameter of the material with a known electrical parameter associated with a known isotope.

Isotope detecting devices

An RFID security device for product packaging is disclosed. The security device includes an RFID tag disposed on a first portion of a product package, and a booster antenna disposed on a second portion of the product package. The RFID tag and booster antenna are positioned on the product package so that the RFID tag will be electromagnetically coupled to the booster antenna when the product package is closed, and the RFID tag will be decoupled from the booster antenna when the product package is open.

Security device for product packaging

Examples associated with user authentication are described. One example method includes authenticating a user of a device using a static authentication technique. A behavior profile associated with the user is loaded. The behavior profile describes a pattern of device usage behavior by the user in a three-dimensional space over a time slice. The behavior profile also identifies distinctive user habits. Usage of the device is monitored, and a behavior similarity index is periodically updated. The behavior similarity index describes a similarity between the usage of the device and the pattern of device usage behavior. The behavior similarity index is weighted based on the distinctive user habits. Access to the device is restricted when the behavior similarity index reaches a predefined threshold.

User authentication

A micro-structure transfer system may include a printhead and a pressure control device to control a pressure of fluid coupled with the printhead. The pressure control device forms a meniscus of fluid at a number of nozzles defined within the printhead to pick up a number of micro-structures. A printhead for transferring micro-structures includes a number of fluid chambers, a number of nozzles defined in an orifice plate through which fluid may exit the chambers, and a pressure control device to control a pressure of fluid within each of the chambers. The pressure control device forms a meniscus of the fluid at a number of nozzles defined within the printhead to pick up a number of micro-structures.

Micro-structure transfer system

Example implementations relate to flexible displays. For example, a flexible display system may comprise a plurality of display layers, an anti-reflective layer among the plurality of display layers to reduce reflection from an underlying light emitting layer, the anti-reflective layer including a wave plate and a polarizer, and a transistor layer among the plurality of display layers. Further, at least a portion of the plurality of display layers may include properties satisfying particular geometric and force balance constraints to enable the transistor layer to maintain a neutral force in response to compression or tension of the flexible display.

Flexible display

A micro light-emitting diode (LED) display assembly includes a backplane, a passivation layer on the backplane, a micro LED on the passivation layer, and a non-transparent metal housing on the passivation layer. The housing includes a base portion on the passivation layer, a sidewall portion upwardly extending from the base portion, a cap portion connected at a top of the sidewall portion, an orifice in the cap portion, and a notch in the cap portion and adjacent to the orifice. The assembly also includes a translucent filter positioned in the notch and covering the orifice, and a pocket defined by an enclosed area in between the sidewall portion, the cap portion, the filter, and the passivation layer. The micro LED is encased within the pocket such that light transmitted from the micro LED directly hits and passes through the filter.

Micro light-emitting diode display with 3D orifice plating and light filtering

One example of a device includes a sensor, a memristor code comparator, and a controller. The sensor is to provide a sensor signal. The memristor code comparator is to compare the sensor signal to a reference signal. The controller is to determine a status of the sensor signal based on the comparison.

Growing community of inventors

Palo Alto, CA, United States of America

Helen Ann Holder