Motorola Corporation

Dee Nai Ong

Karl Robert Weiss

Weng F Yung

David F Willard

Yong Tong Chua

Kim Hoong Ngai

An electronic device () provides for the selective illuminating of an associated display () thereby reducing battery power consumption. The electronic device () provides for detecting an event that will trigger an update of the display () and activation of illumination elements () for illuminating the display and determining whether the information to be displayed will occupy a region (B&#x2013;L) of the display. If so, the region of the display is selectively illuminated by one or more of the illumination elements. The predetermined illumination time period may depend on a selected combination of a size of the region, a location of said region and/or a priority associated with the event.

Selective illumination of regions of an electronic display

A multichannel selective call receiver ( ) includes-a receiver ( ), a controller ( ), a baud detector ( ) and a memory ( ). The controller is adapted to control the receiver in receiving information on a channel ( ). The information on the channel includes mandatory frames having information fields. If the information fields in a mandatory frame on the channel do not indicate more information for the multichannel selective call receiver in the rest of the mandatory frame, the controller controls the receiver to receive information on other channels ( ) during the rest of the mandatory frame. The information on the channel and the other channels is processed in accordance with channel priority as indicated in a channel list stored in the memory.

Channel monitoring by a multichannel selective call receiver

A communication device ( ) comprising a receiver ( ) for receiving coded messages transmitted on one or more channels. There is a micro-processor ( ), in communication with the receiver ( ) and a frequency synthesizer ( ) coupled to both the micro-processor ( ) and the receiver ( ) to thereby control reception of the channels. The communication device ( ) also has a memory ( ) storing a group of-channel frequencies, wherein the micro-processor ( ) is adapted, in combination with the frequency synthesizer ( ), to control the receiver ( ) to scan at least some of the channels during baud detect periods of a protocol cycle associated with at least one of the channels. Further, the micro-processor ( ) cyclically offsets a start of the baud detect periods after completion of a protocol cycle.

Selective call receiver and method for detecting mandatory frames of a channel protocol

A selective call receiver (10) comprising a processor (108) that couples to a receiver circuit (102), a baud rate detector (106) and a memory device (110). The processor (108) activates the baud rate detector (106) that includes a plurality of registers to perform two baud rate detections to confirm a selective call signal before further processing. When a first baud rate detection detects the selective call signal, the processor (108) combines the results of this first baud rate detection and a plurality of predetermined baud rate parameters to provide a second plurality of predetermined baud rate parameters. The processor (108) then activates the baud rate detector (106) to perform a second baud rate detection using the second plurality of predetermined baud rate parameters. Based on the results of the second baud rate detection, the processor (108) determines whether to continue processing the selective call signal.

Selective call receiver with battery saving features and method therefor

A method for battery saving in a selective call receiver (20) that comprises a baud rate detector (210) and a receiver circuit (202) for receiving and demodulating a selective call signal. The selective call signal comprises a preamble (102) and a plurality of data batches. Each of the plurality of data batches further comprises a synchronization codeword (104) and a plurality of assigned data frames (106). The method (30) begins when a predetermined baud rate is detected in each of the plurality of assigned data frames (106) in one of the plurality of data batches. Upon detecting the predetermined baud rate, the selective call receiver (20) inactivates the receiver circuit (202) for the duration of the synchronization codeword (104) in a subsequent one of the plurality of data batches. Otherwise, the receiver circuit (202) remains activated during the synchronization codeword (104) of the subsequent one of the plurality of data batches.

A selective call receiver (10) comprising a receiver circuit (100) having at least one radio frequency amplifier (112) and at least one mixer (114), a baud rate detector (102), a signal grader (104), and a gain controller (106). Coupling to the baud rate detector (102) to determine the signal quality of a selective call signal, the signal grader (104) collates the results of at least one baud rate detection with a plurality of predetermined criteria and assigns a signal grade to the selective call signal. The signal grader (104) then indicates the signal grade to the gain controller (106) which then sets the at least one radio frequency amplifier (112) and the at least one mixer (114) to operate with one of a plurality of selectable predetermined parameters including a gain setting and a mixer injection setting corresponding to the signal grade assigned to the selective call signal.

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Singapore, Singapore

Dee Nai Ong