Abstract: The present invention relates to a power converter, using input voltage provided by a fuel battery and processing an electrical characteristics transformation on the input voltage to output an output voltage to loading. The power converter comprises: a multiple-phase PWM controller to output multiple PWM control signals in accordance with the voltage level of output voltage; a multiple phase bridge converter to input and output the input voltage in accordance with the multiple PWM control signals; and a transformer to input and process an electrical characteristics transformation on the input voltage from the multiple phase bridge converters to output the output voltage. The multiple-phase PWM controller further comprises a PWM generator and at least one phase shifter.

Abstract: An imaging cartridge for a computer system, which is installed in a computer system to facilitate continuous document conveying process without any removable solid document cassette and additional document positioning process, comprises a cartridge housing for accommodating required imaging components; a roller-type document feeding unit, located at one side of the cartridge housing for carrying out continuous document conveying in and out operation of the imaging cartridge; a driving unit, located inside the cartridge housing for driving the document feeding unit; and a scanning unit, located inside the cartridge housing with a distance to the document feeding unit, for converting the imaging data into electrical signals.

Abstract: A computer graphics interface between an application program and device pipeline. The computer system implements a view model including a plurality of coordinate systems. An acyclic graph is stored, wherein the acyclic graph representing dependencies between various items in each of the plurality of coordinate systems. Upon a creation of an item in a first coordinate system of the plurality of coordinate systems, an object is associated with the item an object which associates all derived items from the item in others of the plurality of coordinate systems, wherein the object includes a first flag for indicating whether the item current item is valid within the first coordinate system. The object further includes a second flag for indicating that at least one of the derived items is not valid in its respective coordinate system.