Patent ID: 7137561
Filing Date: 2006-11-21
Classification: B82Y,G06K

Abstract:
1. A wireless laser bar code symbol reading system, comprising: a wireless hand-supportable bar code symbol reader in two-way RF communication with a base station operably connected to a host system, by way of an RF-based wireless data communication link over which two-way communication of data packets can occur in a reliable manner, wherein said wireless hand-supportable bar code reader has an operational mode and a sleep mode, and further includes (1) a hand-supportable housing; (2) a laser-scanning bar code symbol reading mechanism, including a laser diode source, disposed in said hand-supportable housing, for automatically producing a visible laser scanning pattern, and automatically reading a bar code symbol on an object within a first predetermined time period, and each instant said bar code symbol is read within said first predetermined time period, automatically producing a symbol character data string representative of said read bar code symbol; (3) a first RF-based transceiver circuit, disposed in said hand-supportable housing, for transmitting data packets corresponding to said produced symbol character data string, over said RF-based wireless data communication link, to said base station for subsequent transmission to said host system; (4) a battery device for producing a voltage for use in driving electrical components contained within said hand-supportable housing; (5) a low battery condition detection circuit disposed within said hand-supportable housing, for automatically monitoring the voltage state of said battery device and generating a control signal upon automatic detection of a low voltage state in said battery device; (6) a low battery-voltage alarm device disposed within said hand-supportable housing, for producing a low-voltage alarm signal in response to the generation of said control signal; (7) a manually-operated data transmission activation switch, integrated with said hand-supportable housing, for generating a data transmission control activation signal in response to the activation of said manually-activatable data transmission switch within said first predetermined time period; and (8) a device controller, disposed within said hand-supportable housing, for automatically driving said wireless hand-supportable bar code reader into said operational state by activating said laser scanning bar code symbol reading mechanism and said first RF-based transceiver circuit when not receiving said control signal, and for automatically driving said wireless hand-supportable bar code reader into said sleep state by deactivating said laser diode and said first RF-based transceiver circuit when receiving said control signal, and wherein the symbol character data string produced at substantially the same time when said data transmission control activation signal is generated while said wireless laser bar code symbol reading system is operating in said operational state.