Patents
Literature
47 results about "Alternating polarization" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Dynamic Projector Refresh Rate Adjustment Via PWM Control
InactiveUS20080055546A1Large separationUniform polarizationProjectorsStereoscopic photographyGraphicsAlternating polarization
An apparatus and method for stereoscopic 3D image projection and viewing using a single projection source, alternating polarization, and passive eyewear. This approach is applicable to frame sequential video created using existing 3D graphics APIs, as well as other video signal formats, and is compatible with existing digital light processor (DLP) technology for both front and rear projection systems. A alternating polarizer filter actuator in the form of a closed feedback loop with pulse width modulated control is used to modulate the projected image. A preferred embodiment enables an existing DLP projection system to be enhanced with 3D capability.
Owner:IBM CORP
Method and apparatus for optical transmission
InactiveUS20050185968A1Electromagnetic transmittersNon-linear opticsPhase shiftedAlternating polarization
Methods and apparatus are provided for transmitting alternate-polarization phase-shift-keyed data. The output of a laser is modulated to optically encode electronic data using phase shift keying (PSK) to generate an optical signal. An alternate polarization PSK (APol-PSK) signal is generated by alternating the polarization of the optical signal using a modulator such that successive optical bits have substantially orthogonal polarizations.
Owner:ALCATEL-LUCENT USA INC
Image sensor with optical filters having alternating polarization for 3D imaging
ActiveUS20130188023A1Television system detailsSolid-state devicesAlternating polarizationLight sensitive
An image sensor for three-dimensional (“3D”) imaging includes a first, a second, and a third pixel unit, where the second pixel unit is disposed between the first and third pixel units. Optical filters included in the pixel units are disposed on a light incident side of the image sensor to filter polarization-encoded light having a first polarization and a second polarization to photosensing regions of the pixel units. The first pixel unit includes a first optical filter having the first polarization, the second pixel unit includes a second optical filter having the second polarization, and the third pixel unit includes a third optical filter having the first polarization.
Owner:OMNIVISION TECH INC
Split Screen Discrete Viewing Apparatus and Method
InactiveUS20080310018A1Easy to implementAvoid distractionsProjectorsPolarising elementsAlternating polarizationEyewear
The invention is an apparatus and method for allowing multiple individuals to view discrete images while remaining in close proximity to each other. It encompasses a split screen polarized lens, with alternate polarization portions, fitting over a viewing monitor and pairs of corresponding polarized glasses. Each pair of polarized glasses matches a portion of the screen lens with the same polarization so that the human viewer wearing vertically polarized glasses may only view the vertically polarized portion of the screen and the human viewer wearing horizontally polarized glasses may only view the horizontally polarized portion of the screen.
Owner:TRIPP DAVID M
Passive dynamically stabilizing magnetic bearing and drive unit
InactiveUS20060279149A1Easy to produceMechanical energy handlingBearingsMagnetic bearingAlternating polarization
The passive axial magnet bearing comprises permanent magnets (1, 2) arranged with alternating polarization on a rotor (1, 2, 8). These cause an oscillating flow through the coils (L) on both sides of the rotor (1, 2, 8). All coils (L) are series connected in an electric circuit (3). As long as the rotor (1, 2, 8) rotates in the middle position, no current flows in the electric circuit (3), since the voltages across the coils (L) cancel each other due to the symmetry. However, when the rotor (1, 2, 8) deviates from the center position, a current flows and the coils (L) exert electromagnetically a restoring force on the permanent magnets (1, 2). The bearing can also be equipped with an integrated drive. For this purpose, it is extended by drive coils. The production of the bearing is simple and inexpensive.
Owner:SILPHENIX
Stereographic Imaging System Using Open Loop Magnetomechanically Resonant Polarizing Filter Actuator
ActiveUS20080055401A1Low implementation costLarge separationColor television detailsDynamo-electric machinesGraphicsStereoscopic imaging
An apparatus and method for stereoscopic 3D image projection and viewing using a single projection source, alternating polarization, and passive eyewear. This approach is applicable to frame sequential video created using existing 3D graphics APIs, as well as other video signal formats, and is compatible with existing digital light processor (DLP) technology for both front and rear projection systems. An alternating polarizer in the form of a magnetomechanically resonant polarizing filter actuator is used to modulate the projected image. A preferred embodiment enables an existing DLP projection system to be enhanced with 3D capability.
Owner:IBM CORP
Method and apparatus for optical transmission
InactiveUS7844186B2Electromagnetic transmittersNon-linear opticsPhase shiftedAlternating polarization
Methods and apparatus are provided for transmitting alternate-polarization phase-shift-keyed data. The output of a laser is modulated to optically encode electronic data using phase shift keying (PSK) to generate an optical signal. An alternate polarization PSK (APol-PSK) signal is generated by alternating the polarization of the optical signal using a modulator such that successive optical bits have substantially orthogonal polarizations.
Owner:ALCATEL-LUCENT USA INC
Switchable privacy display based on striped polarizer
ActiveUS20160225337A1Polarising elementsCathode-ray tube indicatorsInternet privacyAlternating polarization
A computing device includes a display having a striped polarizer, the striped polarizer includes a set of sub-areas having a first polarization interspersed between another set of sub-areas having a second polarization. The sub-areas are arranged to provide an alternating polarization across a dimension of the display. The computing device may be configured to receive information specifying a privacy display mode, select a privacy display mode based upon the received information, receive input display data configured to represent information for display, generate, in response to selecting the privacy display mode, output display data by inverting a first portion of pixels in the input display data which are associated with a first polarization, and not inverting a second portion of pixels in the input display data which are associated with a second polarization, and provide the output display data to a display.
Owner:SONY CORP
Closed Loop Feedback Control to Maximize Stereo Separation in 3D Imaging Systems
InactiveUS20080055402A1Large separationUniform polarizationColor television detailsSteroscopic systemsGraphics3d image
An apparatus and method for stereoscopic 3D image projection and viewing using a single projection source, alternating polarization, and passive eyewear. This approach is applicable to frame sequential video created using existing 3D graphics APIs, as well as other video signal formats, and is compatible with existing digital light processor (DLP) technology for both front and rear projection systems. An alternating polarizer filter actuator in the form of a closed feedback loop is used to modulate the projected image. A preferred embodiment enables an existing DLP projection system to be enhanced with 3D capability.
Owner:IBM CORP
Image sensor with optical filters having alternating polarization for 3d imaging
An image sensor for three-dimensional (3D) imaging includes a first, a second, and a third pixel unit, where the second pixel unit is disposed between the first and third pixel units. Optical filters included in the pixel units are disposed on a light incident side of the image sensor to filter polarization-encoded light having a first polarization and a second polarization to photosensing regions of the pixel units. The first pixel unit includes a first optical filter having the first polarization, the second pixel unit includes a second optical filter having the second polarization, and the third pixel unit includes a third optical filter having the first polarization.
Owner:OMNIVISION TECH INC
Output stage and related logic control method applied to source driver/chip
InactiveUS20080291598A1Reduce layout sizeImprove integrityStatic indicating devicesEmergency protective circuit arrangementsAlternating polarizationEngineering
Output stage and related method applied to source driver / chip of LCD panel. While performing dot polarization inversion for even / odd channels of LCD panel, n-channel and p-channel MOS transistors of symmetric layout are respectively adopted for alternately transmitting a positive polarization signal of higher swing range and a negative polarization signal of lower swing range from corresponding drivers of asymmetric layout to the even / odd channels, such that a layout area for alternating polarizations can be reduced. Also, the invention directly ties inputs of the output drivers to VDD or VSS so as to turn off the drivers for providing high impedance at the even / odd channels when necessary.
Owner:FARADAY TECH CORP
Switchable privacy display based on striped polarizer
ActiveUS10013947B2Polarising elementsCathode-ray tube indicatorsInternet privacyAlternating polarization
A computing device includes a display having a striped polarizer, the striped polarizer includes a set of sub-areas having a first polarization interspersed between another set of sub-areas having a second polarization. The sub-areas are arranged to provide an alternating polarization across a dimension of the display. The computing device may be configured to receive information specifying a privacy display mode, select a privacy display mode based upon the received information, receive input display data configured to represent information for display, generate, in response to selecting the privacy display mode, output display data by inverting a first portion of pixels in the input display data which are associated with a first polarization, and not inverting a second portion of pixels in the input display data which are associated with a second polarization, and provide the output display data to a display.
Owner:SONY CORP
Output stage and related logic control method applied to source driver/chip
InactiveUS7986290B2Low swing rangeExtended swing rangeStatic indicating devicesEmergency protective circuit arrangementsAlternating polarizationEngineering
Output stage and related method applied to source driver / chip of LCD panel. While performing dot polarization inversion for even / odd channels of LCD panel, n-channel and p-channel MOS transistors of symmetric layout are respectively adopted for alternately transmitting a positive polarization signal of higher swing range and a negative polarization signal of lower swing range from corresponding drivers of asymmetric layout to the even / odd channels, such that a layout area for alternating polarizations can be reduced. Also, the invention directly ties inputs of the output drivers to VDD or VSS so as to turn off the drivers for providing high impedance at the even / odd channels when necessary.
Owner:FARADAY TECH CORP
Dynamic projector refresh rate adjustment via PWM control
InactiveUS8162482B2Large separationUniform polarizationProjectorsColor television detailsGraphicsAlternating polarization
An apparatus and method for stereoscopic 3D image projection and viewing using a single projection source, alternating polarization, and passive eyewear. This approach is applicable to frame sequential video created using existing 3D graphics APIs, as well as other video signal formats, and is compatible with existing digital light processor (DLP) technology for both front and rear projection systems. A alternating polarizer filter actuator in the form of a closed feedback loop with pulse width modulated control is used to modulate the projected image. A preferred embodiment enables an existing DLP projection system to be enhanced with 3D capability.
Owner:IBM CORP
Image sensor with optical filters having alternating polarization for 3D imaging
ActiveUS9177983B2Television system detailsSolid-state devicesAlternating polarizationLight sensitive
An image sensor for three-dimensional (“3D”) imaging includes a first, a second, and a third pixel unit, where the second pixel unit is disposed between the first and third pixel units. Optical filters included in the pixel units are disposed on a light incident side of the image sensor to filter polarization-encoded light having a first polarization and a second polarization to photosensing regions of the pixel units. The first pixel unit includes a first optical filter having the first polarization, the second pixel unit includes a second optical filter having the second polarization, and the third pixel unit includes a third optical filter having the first polarization.
Owner:OMNIVISION TECH INC
Split screen discrete viewing method
InactiveUS8031402B2Avoid distractionsEasy to implementProjectorsPolarising elementsAlternating polarizationEyewear
An apparatus and method for allowing multiple individuals to view discrete images while remaining in close proximity to each other. It encompasses a split screen polarized lens, with alternate polarization portions, fitting over a viewing monitor and pairs of corresponding polarized glasses. Each pair of polarized glasses matches a portion of the screen lens with the same polarization so that the human viewer wearing vertically polarized glasses may only view the vertically polarized portion of the screen and the human viewer wearing horizontally polarized glasses may only view the horizontally polarized portion of the screen.
Owner:TRIPP DAVID M
Complex terrain surveying and mapping method, device, equipment and medium
PendingCN120630235AActive open surveying meansElectromagnetic wave reradiationTerrainAlternating polarization
The invention relates to a complex terrain surveying and mapping method, device and equipment and a medium. According to the complex terrain surveying and mapping method, device and equipment and the medium, laser beams with alternating polarization states are synchronously emitted through a dual-wavelength laser radar, an original point cloud with a space-time mark is captured, and earth surface points and noise points are analyzed based on time difference and polarization degradation characteristics; constructing a noise cluster function according to the noise points to identify vegetation artifacts; performing earth surface confidence evaluation on the earth surface points, filtering noise by using an elevation layering strategy, and positioning a fracture area; and finally, based on the denoised cloud layer, the fracture area and the earth surface point confidence coefficient, reconstructing a terrain curved surface, and generating a continuous terrain model. Therefore, precise reconstruction of the terrain sudden change area under vegetation coverage is realized, and the dual technical effects of resisting complex scattering interference and keeping the integrity of the terrain structure are achieved.
Owner:MUDAN DISTRICT NATURAL RESOURCES BUREAU OF HEZE CITY
Air-cooled heat exchanger and thermal arrangement for stacked electronics
ActiveUS10757809B1Improve power densitySimilar performance levelCircuit arrangements on support structuresCircuit fluid transportAlternating polarizationHemt circuits
A stacked electronic arrangement provides independent upgradability of active component boards and radiator boards, enabling quick changes in chip set and alternate polarizations, and includes: an active tile circuit card assembly (CCA); a passive radiator CCA; a tile frame; and a heat exchanger. The active tile CCA includes transmit / receive modules that accept, amply and transmit radar signals. The passive radiator CCA includes patch radiator plugins that receive and then radiate the amplified signal from the modules. The tile frame separates the active tile and the passive radiator CCAs. An elongated casing of the heat exchanger creates an accommodating space for air flow, and forms a first inlet, a second inlet, and a central exhaust plenum between the first and second inlets. High density tins are positioned within the accommodating space between the first and second inlets, and which have openings to the exhaust outlet.
Owner:TELEPHONICS
Space-time polarization anti-interference method based on alternate polarization sensitive array
ActiveCN111880198AReduce coupling errorReduce cross-couplingSatellite radio beaconingTransmissionAlternating polarizationSpace-time adaptive processing
Owner:OCEAN UNIV OF CHINA
Brushless DC motor incorporating single pole double throw magnetic switch
InactiveUS10056808B2Improve efficiencySimple structureAssociation with control/drive circuitsMagnetic circuit rotating partsRotor magnetsAlternating polarization
A brushless DC motor utilizing a single pole double throw reed switch as a rotor position sensor. In one embodiment, the motor has a four-pole internal stator with bifilar windings providing alternating polarization for each subsequent pole, and a hollow outer rotor with radially magnetized ring-shaped permanent magnet. The rotor magnet has magnetically uninterrupted four-pole torque generating surface and incorporates features to interact with the reed switch. A non-uniform air gap between the stator poles and an inner surface of the rotor magnet allows generating a complementary reluctance torque between the energization pulses. The motor includes means to limit the electric current through the reed switch.
Owner:POZMANTIR MICHAEL +1
Method and arrangement for polarization control in a communication system
ActiveCN103141035AReduced negative consequencesSuppress interferenceSpatial transmit diversityPolarisation/directional diversityPrecodingCommunications system
Controlling the polarization state of signals to be transmitted from a MIMO capable radio base station node to a plurality of user equipment, which radio base station node comprises a precoder unit connecting a first and a second virtual antenna port to a respective first and second transmit antenna port, by the steps of controlling (S10) a relative phase between transmitted signals from the first and second transmit antenna port to provide a predetermined pair of orthogonal polarization states for signals transmitted on the first and second virtual antenna ports, and interchanging (S20) the polarization states of the first and second virtual antenna ports, to provide transmitted polarized signals with alternating polarization states.
Owner:TELEFON AB LM ERICSSON (PUBL)
Method and system for improving multiple-input-multiple-output (MIMO) beam isolation via alternating polarization
Aspects of the subject disclosure may include, for example, polarization adaptation in panel MIMO antennas to improve isolation between downlink beams so as to reduce or minimize beam interference, which improves antenna performance and / or reduces antenna size requirements. Other embodiments are disclosed.
Owner:ISCO INTERNATIONAL LLC
Pulsed scalar atomic magnetometer
ActiveUS20180356476A1High strengthMagnetic field measurement using magneto-optic devicesMeasurements using magnetic resonanceAlternating polarizationSpin polarization
Disclosed is a method and apparatus relating generally to scalar atomic magnetometers. The disclosed methods and apparatus utilize a pressurized sample chamber and a high frequency pulsed pump laser to increase spin polarization and significantly suppress heading errors. These methods and apparatus may also include alternating polarization of the pump light between pulses.
Owner:THE TRUSTEES FOR PRINCETON UNIV
Polarized film apparatus with bands of alternating orientation
InactiveUS8711481B2Easy to installReduce system costPolarising elementsAlternating polarizationHeat transmission
A polarized film apparatus comprising printed bands of successively alternating polarization orientations is disclosed. The printed bands of alternating polarization orientations repeat throughout the length of the film. The polarized film can be installed in an object, for example a window where the amount of energy through the object has to be controlled. Two identical films are superimposed to create polarization patterns that can be varied when one film is displaced with respect to the other. The resulting variable polarization patterns can be utilized to control the amount of energy allowed through this arrangement. The polarized films with bands of alternating polarization orientations can be utilized to control the amount of energy for example sunlight, radiated heat transmission, illumination level, electromagnetic radiation, etc.
Owner:INICIA IP HLDG
Direction and polarization joint estimation method based on time modulation array
ActiveCN120831626ARadio wave direction/deviation determination systemsAntenna polarizationModulation function
The invention belongs to the technical field of time modulation arrays, and relates to a direction and polarization joint estimation method based on a time modulation array, which comprises the following steps: establishing an alternating polarization time modulation array, obtaining a receiving signal of each array element, a time modulation function and a polarization vector of each array element, and further obtaining an actual receiving signal of each array element, establishing a linear relation among a harmonic component, a polarization parameter and an incident direction of a received signal of each sub-array; according to the linear relation, the relation between direction disturbance and direction function disturbance is obtained, a vector formed by subarray harmonic components is rewritten into a form containing a noise item, error disturbance between a truth value of a direction function and a corresponding estimator is obtained, and then a direction estimation value is obtained; according to the linear relation, the relation between the polarization matching coefficient of the array manifold vector estimation value and antenna polarization and radiation source polarization is obtained, and then the polarization estimation value is obtained. According to the invention, joint estimation of direction and polarization can be realized.
Owner:NAT UNIV OF DEFENSE TECH
Laser module assembly of alignment system, metrology system and lithographic apparatus
A metrology system includes a radiation source configured to generate a plurality of light beams, each light beam centered at a different wavelength; a dynamic polarization controller configured to dynamically alternate a polarization orientation of each of the plurality of light beams; a polarization multiplexer configured to combine the plurality of light beams having a dynamically alternating polarization orientation into a combined light beam; a reflector configured to direct the combined light beam toward a substrate; an interferometer configured to receive light that has been diffracted from the pattern on the substrate and to generate output light according to interference between the diffracted light; and a detector configured to detect an optical signal based on output light from the interferometer and output an intensity signal that varies over time.
Owner:ASML HLDG NV
Complementary switchable dual-mode bulk acoustic wave resonator and filter
A laminated ScxAl1-xN BAW resonator with complementary-switchable operation in thickness extensional modes (TEl and TEN). The resonator comprises ferroelectric ScxAl1-xN layers alternatively stacked with metal electrodes, enabling independent polarization switching of each piezoelectric layer. Opting for unanimous or alternative poling of the ScxAl1-xN layers, the resonator can be switched to operate in two complementary states with either TEl or TEN active resonance modes of similarly large kt2.
Owner:UNIV OF FLORIDA RESEARCH FOUNDATION INC
Acoustic wave device comprising alternating polarisation domains
The invention relates to an acoustic wave device comprising a ferroelectric material layer (C) and a substrate (S). A layer of ferroelectric material is located between a first electrode (E1) and a second electrode (E2) deposited on the surface of the substrate or is an integral part of the substrate, the layer of ferroelectric material comprising a positive first polarization region ( D1) and a negative second polarization region (D2). For the field of surface wave sensors, the structure can preferably be made into conversion regions with pitches on the order of hundreds of nanometers, so as to be suitable for high-frequency (on the order of one gigahertz) applications.
Owner:THALES SA
Air-Cooled Heat Exchanger and Thermal Arrangement for Stacked Electronics
ActiveUS20200352030A1Improve power densitySimilar performance levelCircuit arrangements on support structuresCircuit fluid transportAlternating polarizationHemt circuits
A stacked electronic arrangement provides independent upgradability of active component boards and radiator boards, enabling quick changes in chip set and alternate polarizations, and includes: an active tile circuit card assembly (CCA); a passive radiator CCA; a tile frame; and a heat exchanger. The active tile CCA includes transmit / receive modules that accept, amply and transmit radar signals. The passive radiator CCA includes patch radiator plugins that receive and then radiate the amplified signal from the modules. The tile frame separates the active tile and the passive radiator CCAs. An elongated casing of the heat exchanger creates an accommodating space for air flow, and forms a first inlet, a second inlet, and a central exhaust plenum between the first and second inlets. High density fins are positioned within the accommodating space between the first and second inlets, and which have openings to the exhaust outlet.
Owner:TELEPHONICS
Closed loop feedback control to maximize stereo separation in 3D imaging systems
InactiveUS8264525B2Large separationUniform polarizationProjectorsSteroscopic systemsGraphicsClosed loop feedback
An apparatus and method for stereoscopic 3D image projection and viewing using a single projection source, alternating polarization, and passive eyewear. This approach is applicable to frame sequential video created using existing 3D graphics APIs, as well as other video signal formats, and is compatible with existing digital light processor (DLP) technology for both front and rear projection systems. An alternating polarizer filter actuator in the form of a closed feedback loop is used to modulate the projected image. A preferred embodiment enables an existing DLP projection system to be enhanced with 3D capability.
Owner:INT BUSINESS MASCH CORP