Patent ID: 8340595
Filing Date: 2012-12-25
Classification: H04B

Abstract:
1. A method comprising: providing a portable electronic device having a keypad, a memory, a liquid crystal display, a radiofrequency transceiver, a radiofrequency antenna and a light emitting diode; detecting a key value input from the keypad as being a sole condition; in response to detecting the key value, (a) converting the key value to a code value based on a code table stored in the memory and (b) switching the liquid crystal display to an off state; modulating the code value to generate a modulated code value; providing the modulated code value to the radiofrequency transceiver; amplifying the modulated code value to generate an amplified code value; converting the amplified code value to a radiofrequency signal; transmitting the radiofrequency signal from the radiofrequency antenna; determining whether transmission of the radiofrequency signal is complete; and switching the liquid crystal display to an on state after transmission of the radiofrequency signal is complete; wherein while the liquid crystal display is in the off state, a status of the radiofrequency transceiver is displayed using the light emitting diode.