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Resonant converter tuning for maintaining substantially constant phaco handpiece power under increased load

ActiveUS6997935B2Simple filterReduced transistor switching loss lossEye surgerySurgeryPhacoemulsificationTransducer
A phacoemulsification system includes a phacoemulsification handpiece including a cutting tip ultrasonically vibrated by an ultrasonic transducer. A power supply is provided for driving the ultrasonic transducer at a resonant frequency of the transducer and cutting tip and varying power to the transducer, in response to loading of the cutting tip, by phase shifting drive signals to the resonant converter which supplies power to the transducer.
Owner:JOHNSON & JOHNSON SURGICAL VISION INC

Lighting device and lighting method

A lighting device comprising sources of visible light comprising solid state light emitters and / or luminescent materials emitting three or four different hues. A first group of the sources, when illuminated, emit light of two hues which, if combined, would produce illumination having coordinates within an area on a 1931 CIE Chromaticity Diagram defined by points having coordinates: 0.59, 0.24; 0.40, 0.50; 0.24, 0.53; 0.17, 0.25; and 0.30, 0.12. A second group of the sources is of an additional hue. Mixing light from the first and second groups produces illumination within ten MacAdam ellipses of the blackbody locus. Also, a lighting device comprising a white light source having a CRI of 75 or less and at least one solid state light emitters and / or luminescent material. Also, methods of lighting.
Owner:IDEAL IND LIGHTING LLC

Computer-implemented system and methods for secure package delivery

In some embodiments, a secure package delivery system and methods may include a remotely-controllable electronic door lock device accessible by in a system server, a delivery information device in communication with the system server, and a client device in communication with the system server. The delivery information device may provide delivery status information of a package to the system server. The remotely-controllable electronic lock device may enable or prevent access to a door at the location to which the package is to be delivered. The system server may, in response to receiving a notification that the package en route for delivery is proximate the delivery location and receiving a secure package delivery indicator associated the package recipient's account that indicates whether the package recipient has provided consent for a package delivery in a structure at the delivery location locked with an electronic lock without further instruction by the package recipient at a time of delivery. If the received secure package delivery indicator indicates the package recipient's consent for a package delivery in the structure without further instruction by the package recipient at a time of delivery, transmitting an access request signal for causing a lock control system associated with an electronic lock at an access door of the structure at the delivery location to cause the lock control system to unlock the lock. The system server may also be configured to communicate delivery completion information to the client device.
Owner:IDLOCKSMART COM LLC

Lighting device

A lighting device comprising at least one solid state light emitter and at least one luminescent element spaced from the light emitter, a surface of the luminescent element being at least twice as large as the illumination surface of the light emitter. Also, a lighting device comprising at least one solid state light emitter and at least one luminescent element spaced from the light emitter, a surface of the luminescent element surface being at least twice as large as and substantially parallel to the illumination surface of the light emitter. Also, a lighting device comprising at least one solid state light emitter and at least one luminescent element spaced from the light emitter, a surface area of a projection of the luminescent element being at least twice as large as a surface area of a projection of the light emitter.
Owner:CREELED INC

Sequentially-controlled solar array power system with maximum power tracking

A power and control architecture employing circuitry that sequentially regulate power flows from independent solar-array sources or a mixture of power sources providing power to a common load. The device may be used on a satellite with solar-array sources; however it may also be used on ground based systems. Stiff bus voltage regulation is obtained by tightly controlling the most recently activated power-processing channel while keeping the previously activated power-processing channels in the Maximum Power Tracking mode to supply maximum power to a common load. The remaining power-processing channels are turned off or operated in stand-by mode. In an alternative system, with primary design goal of uniform power sharing among solar-array sources, all solar array sources are activated with uniform power sharing at light load and, as load demand increases, sequentially controlled to operate in the Maximum Power Tracking mode one solar array source at a time as necessary.
Owner:THE AEROSPACE CORPORATION

Active fly height control crown actuator

A micro-actuator is comprised of a piezoelectric motor mounted on a flexure tongue with offsetting hinges, to perform a fine positioning of the magnetic read / write head. The substantial gain in the frequency response greatly improves the performance and accuracy of the track-follow control for fine positioning. The simplicity of the enhanced micro-actuator design results in a manufacturing efficiency that enables a high-volume, low-cost production. The micro-actuator is interposed between a flexure tongue and a slider to perform an active control of the fly height of the magnetic read / write head. The induced slider crown and camber are used to compensate for thermal expansion of the magnetic read / write head, which causes the slider to be displaced at an unintended fly height position relative to the surface of the magnetic recording disk. The enhanced micro-actuator design results in reduced altitude sensitivity, ABS tolerances, and reduced stiction. The controlled fly height of the magnetic read / write head prevents a possibility of a head crash, while improving the performance and data integrity.
Owner:WESTERN DIGITAL TECH INC

Data communication system, data communication request device, and data communication response device

InactiveUS20100142418A1Decrease in communication efficiencyDifferent selectionWireless communicationDuplex signal operationComputer hardwareCommunications system
The object of the present invention is to provide a data communication system in which a communication scheme is switched without a decrease in communication efficiency.
In a data communication system including first and second devices that are capable of performing full-duplex communication and half-duplex communication via a set of channels connecting the first and second devices, the first device transmits, via the set of channels, to the second device a first communication flag indicating whether half-duplex communication is to be specified in accordance with a communication processing capability of the first device, the second device transmits, via the set of channels, to the first device a second communication flag indicating whether half-duplex communication is to be specified in accordance with a communication processing capability of the second device, and the first and second devices select either a full-duplex communication scheme or a half-duplex communication scheme depending on the first and second communication flags in compliance with a procedure predetermined between the devices and perform data communication in the selected communication scheme, the selected communication scheme conforming to the communication processing capability of each device.
Owner:PANASONIC CORP

Display apparatus

A display apparatus that displays an image on a retina of a user, the display apparatus comprising: an image output unit (100) which includes a light source (101, 110), a wavefront shape change unit (102, 109), and a scan unit (103, 108) and is configured to output display light for displaying the image; and a deflection unit (104, 107) configured to deflect, toward an eye of the user, the display light outputted by the image output unit (100). The deflection unit (104, 107) has a deflection characteristic of suppressing image distortion caused by a change in relative position of the deflection unit (104, 107) with respect to a pupil of the user.
Owner:PANASONIC CORP
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