Inventor

SPRAGUE ROBERT A

98 patents

⚠️ This page may combine multiple inventors who share the name “SPRAGUE ROBERT A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SPRAGUE ROBERT A

XEROX CORP

Charge retention islands for electric paper and applications thereof

Paper property sensing system

Optical cursor control device

Direction signage system

Flexible object handling system using feedback controlled air jets

Full color display with gradient index lens array disposed between phosphor emitters and liquid crystal display

Two path liquid crystal light valve color display with light coupling lens array disposed along the red-green light path

Pedestal-type microlens fabrication process

Laser cavity optical system for stabilizing the beam from a phase locked multi-emitter broad emitter laser

Multi-beam optical system using lens array

High resolution input scanner using a two dimensional detector array

Light modulator/deflector using acoustic surface waves

TIR Electro-optic modulator with individually addressed electrodes

Enhanced off-axis viewing performance and luminous efficiency of a liquid crystal display employing fiberoptic faceplate elements

Method of using focused acoustic waves to deliver a pharmaceutical product

Using capillary wave driven droplets to deliver a pharmaceutical product

Quality control mechanism and process for a biofluid multi-ejector system

Bound document imager with air jet page turning system

Full color display with plural two-dimensional planar arrays of lenslets

SPRAGUE ROBERT A

Color display devices

Electrophoretic display with enhanced contrast

Electronic information displays

Highlight color display architecture using enhanced dark state

Electrophoretic display fluid

Spatially combined waveforms for electrophoretic displays

Driving methods for electrophoretic displays

Multicolor display architecture using enhanced dark state

Display device with a brightness enhancement structure

Driving methods for electrophoretic displays employing grey level waveforms

Composite display modules

Display device assembly and manufacture thereof

Front light system for reflective displays

Display device assembly

SIPIX IMAGING INC

Color display devices

Color display devices

Driving bistable displays

Color display devices

Display devices having micro-reflectors

Electrophoretic dispersion

Electrophoretic display design

E INK CALIFORNIA LLC

Color electrophoretic display

Additive particles for improving optical performance of an electrophoretic display

Electrophoretic dispersion

LIN CRAIG

Color display devices

Color display devices

Luminance enhancement structure for reflective display devices

ZHANG XIAOJIA

Color display devices

CHUNG JERRY

Electrophoretic display with thermal control

WANG MING

Shutter mode for color display devices

ITEK CORP

Method and apparatus for detecting cosmetic defects in opthalmic lenses