Motorola Corporation

Ruben Rivera

Patrick M Dunn

David L Ellis, Ii

Charles Burton Swope

Charles R Ruelke

Jeffrey A Underwood

John R Melton

Timothy J Dinwiddie

James Scott McKee

A location determination device () is worn on a user's head to facilitate searching and tracking for another individual carrying a portable radio () as well as locating exit routes. At least two antennas (), a monopulse receiver () and a display are integrated into the location determination device (). Location determination device () scans for an incoming signal () from the portable device () and coverts the signal into angular location data. The location data and egress information are displayed to the peripheral vision of the user of the location determination device ().

Method and apparatus for location determination

A wireless communication device () is provided with a movement sensor (), and circuitry for controlling the operation of the wireless communication device. In operation in response to detecting predetermined movement of the wireless communication device, an alert () that was previously activated to alert a user to an incoming wireless communication is muted.

Method and apparatus of muting an alert

The method of the present invention produces a plurality of bi-level waveforms on the ROW/common lines and COLUMN/segment lines of a passive multiplexed liquid crystal display (LCD). These waveforms drive the LCD display using binary data from display memory locations. At periodic intervals a counter is incremented while the counter value is then used to 1) look-up in a table the bi-level data to output on the ROW/commons; 2) look-up memory locations associated with the active COLUMN/segments; and 3) to provide inverted COLUMN/segments data before sending the bi-level data to the COLUMN/segment lines of the LCD. The counter increments from zero to four times the number of ROW/commons before being reset to zero and the waveforms repeated. Thus, an algorithm produces one ON/select voltage and one OFF/non-select voltage that are provided to the LCD.

Method for multiplex driving a passive liquid crystal display (LCD)

A method of multiplex driving a passive liquid crystal display (LCD) using a bi-level LCD multiplex driver for providing one or more bi-level waveforms on the ROW/common lines and COLUMN/segment lines of a multiplexed liquid crystal display (LCD). These waveforms drive the LCD display using binary data from display memory locations. At periodic intervals the machine state is advanced with the present state used to 1) look-up in a table the bi-level data to output on the ROW/commons, and 2) look-up memory locations associated with the active COLUMN/segments; and 3) to provide inverted COLUMN/segments data before sending the bi-level data to the COLUMN/segment lines of the LCD. The states advance four times the number of ROW/commons before being reset to the initial state and the waveforms repeated. Thus, the machine produces one ON/select voltage and one OFF/non-select voltage are provided to the LCD according to predetermined formulas.

Integrated multiplex drive system for a passive liquid crystal display

A shielding enclosure (10) shields an electronic circuit (12) from radio frequency interference (RFI) or electromagnetic interferences (EMI). The shielding enclosure is an electrically conductive polyhedron having at least one aperture (18). The enclosure has a closable member (20), which is a part of the polyhedron, arranged to enable the aperture to be opened and closed. The polyhedron can be an electrically conductive metal enclosure that covers the shielded circuit, and is mechanically and electrically attached to the circuit. The aperture has an integral flap (21) connected to the enclosure at one end (23), so that it is able to be opened and closed to reveal the shielded circuit. Any openings remaining in the polyhedron when the aperture is closed are less than or equal to 1/4 wavelength of the interfering radio frequency energy.

Radio frequency isolation shield having reclosable opening

Briefly, according to the invention, a laser trim system (100) for trimming printed components (112) on a circuit carrying substrate (118) is disclosed. The laser trim system (100) includes a laser source (102) for trimming the printed circuit components (112). The laser source (102) has an adjustable power level, suitable for trimming a variety of printed components. The laser trim system (100) also includes a power converter (110) for selectively measuring the power level of the laser source (102). A laser power supply (104) is also included in the laser trim system (100) for adjusting the power level of the laser source (102) in response to the measured power level. The laser trim system (100) further includes a computer (1068) for comparing the measured laser power level with pre-defined levels to determine when a change in the power level is necessary.

Growing community of inventors

Sunrise, FL, United States of America

Ruben Rivera