Power supply control in portable data terminal
November 2, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPower supply and battery charging system Power-management system for a computer Power-supply control system for a portable data processor and method for driving the same 5548763 Power source system of portable information processing system using battery Suspension state control for information processing devices such as battery powered computers Power supply circuit with power saving capability Selection circuit for dual batteries in a battery powered electronic device Computer system having detachable expansion unit Power supply controller in computer system for supplying backup power to volatile memory while the computer receives AC power InventorAssigneeApplicationNo. 432162 filed on 11/02/1999US Classes:700/22, Electrical power distribution320/117, Switchable to parallel connection320/120, Having variable number of cells or batteries in series320/121, Switchable cells (e.g., for voltage regulation, etc.)320/134, With battery or cell condition monitoring (e.g., for protection from overcharging, heating, etc.)365/203, Precharge365/226, POWERING365/229, Standby power700/19, Plural controlled systems, mechanisms, or elements700/20, Plural controllers700/79, Having protection or reliability feature700/82, Backup/standby710/8, Peripheral configuration710/62, Peripheral adapting710/67Keystroke interpretationExaminersPrimary: Patel, RameshAttorney, Agent or FirmForeign Patent References
International ClassG05B 011/01Foreign Application Priority Data1998-11-04 JPAbstractA data terminal apparatus includes a basic unit, a plurality of units, a power supply circuit, switching units and a controller. The basic unit realizes a basic function of the data terminal apparatus and requires a basic quantity of DC power. Each of the plurality of units realizes a specific function of the data terminal apparatus and requires quantities of DC power. The power supply circuit receives DC power from a power supply source, and can supply the DC power to the basic unit and the plurality of units. The switching units are provided for the plurality of units, and each of the switching units selectively supplies the DC power from the power supply circuit to a corresponding one of the plurality of units in response to a switching control signal. The controller selectively outputs the switching control signals to the switching units based on the DC power of the power supply source.Field of SearchOperator interface (e.g., display with control)Specific programming (e.g., relay or ladder logic) Plural controlled systems, mechanisms, or elements Plural controllers Having operator control interface (e.g., control/display console) Failure protection or reliability Electrical power distribution Sequence program response Having specific error signal generation (e.g., up/down counter) Having protection or reliability feature Warning or alarm Self-test Backup/standby COMPUTER POWER CONTROL Power conservation Programmable calculator with power saving feature By clock speed control (e.g., clock on/off) Active/idle mode processing By shutdown of only part of system Having power source monitoring By external command Power sequencing Precharge Standby power POWERING Peripheral configuration Peripheral adapting Keystroke interpretation SERIALLY CONNECTED BATTERIES OR CELLS Switchable to parallel connection Having variable number of cells or batteries in series Switchable cells (e.g., for voltage regulation, etc.) SEQUENTIAL CHARGING OR DISCHARGING OF BATTERIES OR CELLS DIVERSE CHARGING OR DISCHARGING RATES FOR PLURAL BATTERIES PARALLEL CONNECTED BATTERIES BATTERY OR CELL DISCHARGING With battery or cell condition monitoring (e.g., for protection from overcharging, heating, etc.) | |
