Abstract: Very high refractive index (n>2.2) lightguide substrates enable the production of 70° field of view eyepieces with all three color primaries in a single eyepiece layer. Disclosed herein are viewing optics assembly architectures that make use of such eyepieces to reduce size and cost, simplifying manufacturing and assembly, and better-accommodating novel microdisplay designs.

Abstract: Waveguides comprising materials with refractive index greater than or equal to 1.8 and methods of patterning waveguides are disclosed. Patterned waveguides comprising materials with refractive index greater than or equal to 1.8 can be incorporated in display devices, such as, for example wearable display devices to project virtual images to a viewer.

Abstract: Very high refractive index (n>2.2) lightguide substrates enable the production of 70° field of view eyepieces with all three color primaries in a single eyepiece layer. Disclosed herein are viewing optics assembly architectures that make use of such eyepieces to reduce size and cost, simplifying manufacturing and assembly, and better-accommodating novel microdisplay designs.

Abstract: A pressure sensitive adhesive composition including silicone-modified tackifier. The silicone-modified tackifier is produced by reacting reactive silicone with tackifier. Laminates made with the pressure sensitive adhesive have improved guillotinability.

Abstract: A pressure sensitive adhesive composition including silicone-modified tackifier. The silicone-modified tackifier is produced by reacting reactive silicone with tackifier. Laminates made with the pressure sensitive adhesive have improved guillotinability.

Abstract: A method and apparatus of an alarm management system (114) for dynamically prioritizing network conditions for a communication system (100) is disclosed. The alarm management system includes a receiver (116) and processor (118) for receiving one of a plurality of alarm conditions indicating a fault in a device within the communication system and classifying the alarm condition. The alarm management system also determines a status of the device and rates the alarm by comparing the classification of the alarm condition with the status of the device. The rated alarm condition can then be ranked against another of the plurality of alarms. The alarm management system then re-evaluates the ranking of alarm condition by repeating the determining and rating steps and then ranks the re-evaluated rated alarm condition against other alarm conditions.

Abstract: A microprocessor based uninterruptible power supply generates an AC electrical output power from an AC input source when the AC input source is within settable voltage limits and from an auxiliary source of DC power when the AC input source is outside said the voltage limits. The microprocessor provides monitoring of the AC input voltage to determine its amplitude and frequency, and uses this information to set the magnitude and frequency of the AC output voltage and to select the source of the AC output power. A power factor improvement circuit boosts the selected source to a high DC voltage which is inverted by a chopper circuit to produce a high frequency AC voltage is rectified and sent to a PWM inverter to produce the AC output power. An average current feedback loop provides the output voltage regulation and utilizes current limiting to provide output current limiting for protection against short circuits and overloads.

Abstract: A shipping-price tag label is affixed to a package with the individual price tags surrounded on three sides of the perimeter by a shipping label portion adhesively secured to the exterior of the package, with the surfaces of the price tag portion and shipping portion substantially flush. The price tags have price indicia disposed on each of them, and a release sheet that is readily separable from the shipping label is between the price tag portions and the package, and may be detached by grasping a tab extension of the release sheet and tearing along perforation lines. A number of shipping-price tag labels maybe provided in web form, typically a cut sheet format having a first ply with a printable top surface and bottom surface covered by pressure sensitive adhesive, and a second ply comprising a release sheet with a generally C-shaped die cut formed in the release sheet, the individual price tag labels formed by die cuts in the first ply overlying the C-shaped die cut area of the release sheet.

Abstract: A current mode control apparatus generates an AC power output from a DC input source. The apparatus includes a pulse width modulator (PWM) to produce gate drive signals for driving a power output section having an output inductor and connected across the DC input source. An inner current error control loop coupled between the AC power output and the PWM, controls the average current in the output inductor by generating a current error signal for inputting to the PWM for conversion to the gate drive signals. The current error signal is the difference between the average current and a voltage controlled input signal. An outer voltage error control loop coupled between the AC power output and the inner current error control loop generates a voltage error signal based on the difference between the AC power output and a reference AC voltage.

Abstract: A power output driver circuit that converts a DC voltage into an AC voltage includes a gate driver circuit for turning on electronic switching devices. The gate driver circuit allows for a rapid turn-off of the conducting electronic switching device by having a first conduction path for the gate drive signals that turn-on the switching devices and a second conduction path that rapidly discharges stored energy in the gate/drain capacitance of the switching devices, resulting in a faster turn-off time. A transistor in the gate circuit shunts the stored charge directly to the source terminal of the switching device.