Other

Honeywell International Inc.

Goodrich Corporation

Goodrich Aerospace Services Private Limited

Eric Duane Ronning

Dennis Michael Davey

Brian David Cull

Mark Struebel

Camila Summers

Natraj Ninjuri

Esli Kevin Young

Kalluri Rao

A calibration system includes an excitation module that introduces an excitation signal to a primary coil of a differential transformer, a measurement module that measures, at a first phase shift, a positive value of an induced signal. The induced signal is caused by the excitation signal on a secondary coil of the differential transformer. The system further includes a calculation module that compares the positive value to a last positive value to form a compared positive value, and a calibration module that changes the first phase shift based on the compared positive value.

Self-calibrating linear voltage differential transformer demodulator

A control system includes an electro-hydraulic servo valve configured to move about a plurality of positions in response to receiving an analog bi-polar current signal. An electronic field programmable gate array (FPGA) generates first and second digital pulse width modulation (PWM) signals according to an adjustable duty cycle. An electronic bridge circuit is in electrical communication with the FPGA to convert the first and second digital PWM signals into the bi-polar current signal. An electronic current sensing circuit is in electrical communication with the bridge circuit, the current sensing circuit configured to generate a digital feedback signal indicating an average current level of the bi-polar signal. The FPGA controls the duty cycle based on at least the average current level indicated by the digital feedback signal.

Electro-hydraulic servo valve control system

A turn signal apparatus includes a heading indicator which provides a heading signal and a control circuit which provides a turn direction output signal. The turn direction output signal is chosen to indicate a turn direction in response to the heading signal and a corresponding turn direction input signal. The turn direction can be for a right turn, a left turn, or a neutral turn. A left or right turn indication can be changed to a neutral turn indication in response to the heading signal.

Turn signal apparatus with magnetic sensor or compass and auto-cancel

Apparatus are provided for driving an LED light source and controlling a light output of the light source over a wide luminance range in response to a luminance input. The apparatus includes: a voltage source having an output configured to couple with the light source, a first input configured to receive the luminance input, and a second input; a photodetector unit configured to logarithmically compress the luminance range and determine a voltage based on a luminance of the light source in the compressed range; a comparator having an input coupled to the photodetector unit and having an output; and, a signal converter having an input coupled to the output of the comparator and having an output coupled to the second input of the voltage source. The voltage source is configured to generate an output signal at the output of the voltage source. The output signal has a frequency and a pulse width based on the luminance input. The comparator is configured to determine an error signal based on a comparison of the luminance input with the voltage. The converter is configured to exponentially convert the error signal to the frequency.

Light emitting diode driving apparatus with high power and wide dimming range

Methods and apparatus are provided for a backlit display with variable luminance and chrominance. The apparatus comprises i groups of LEDs of different colors and one or more sensors optically coupled to the LEDs. The combined light produced by the LEDs is directed to a transmissive liquid crystal display, preferably through a diffusing layer. The sensors monitor the output Sof each group of LEDs. Sfor each group of LEDs is multiplied by a chrominance determining parameter Kto obtain K*Swhich is then compared to a commanded luminance signal Lto obtain L&#x2212;K*S, which difference is used to adjust the drive current to each group of LEDs to achieve Lwith the desired chrominance set by K. By changing Kand Lthe chrominance and luminescence of the display may be varied and aging effects compensated.

Chroma compensated backlit display

A method and system for pushing information to personal computing and communication devices operated by users in such a way that the users can use and/or act upon the information even when the users are off-network or off-line. The method and system also automatically &ldquo;provisions&rdquo; the personal computing and communication devices so that the devices may be used to act upon the information that is pushed to the devices.

Growing community of inventors

Glendale, AZ, United States of America

Eric Duane Ronning