Abstract: A system and method for reducing power consumption in a digital display device in standby mode. The display device receives a voltage from a secondary power source in main mode but not in standby mode. An opto-coupler detects the voltage from the secondary power source. An integrated circuit that controls power to the display device is powered on in response to the opto-coupler detecting the voltage, and is otherwise powered off. The display device switches to main mode when the secondary power source is detected and to the standby mode when it is not. With use of the opto-coupler, it is not necessary for components of the display device to remain powered on in standby mode in order to detect the secondary power source and switch to main mode. Consequently, the digital display device consumes less than one watt of power in the standby power mode.

Abstract: A method and apparatus for monitoring and/or shutting down a power line in, for example, a display device is described. In one embodiment, a method comprises converting a voltage on a power line to a digital value, comparing the digital value with a predetermined value, and shutting down a power supply if the digital value is below the predetermined value for a predetermined amount of time.

Abstract: A system and method for reduced standby power consumption in a display device. In one embodiment, a circuit for power mode switching between a main mode and a standby mode of a display device is provided. In this embodiment, the circuit comprises a power supply unit coupled to a power source for receiving an input power signal and for generating output power signals when the display device is in the main mode. The circuit also includes an opto coupler coupled to a computer and responsive to a sync signal therefrom. The opto coupler is also coupled to the power supply unit for selectively sending an OFF signal thereto when the opto coupler does not detect the sync signal from the computer. Moreover, in this embodiment, the power supply unit shuts down and stops generating the output power signals in response to the OFF signal, thereby switching the display device to the standby mode.

Abstract: A method and apparatus for monitoring and/or shutting down a power line in, for example, a display device is described. In one embodiment, a method comprises converting a voltage on a power line to a digital value, comparing the digital value with a predetermined value, and shutting down a power supply if the digital value is below the predetermined value for a predetermined amount of time.

Abstract: A system and method for reduced standby power consumption in a display device. In one embodiment, a circuit for power mode switching between a main mode and a standby mode of a display device is provided. In this embodiment, the circuit includes a power supply unit coupled to a power source for receiving an input power signal and for generating output power signals when the display device is in the main mode. The circuit also includes an opto coupler coupled to a computer and responsive to a sync signal therefrom. The opto coupler is also coupled to the power supply unit for selectively sending an OFF signal thereto when the opto coupler does not detect the sync signal from the computer. Moreover, in this embodiment, the power supply unit shuts down and stops generating the output power signals in response to the OFF signal, thereby switching the display device to the standby mode.

Abstract: A method and system for allowing a power supply circuit to limit inrush current and to use a small current specification switch. The power supply circuit comprises a transformer that receives a power signal from a primary circuit and supplies power of a selected voltage to a secondary circuit, to which a load is coupled. The primary circuit comprises a rectifier for providing a rectified power signal to the transformer, a power supply controller for controlling the transformer, and a small current specification switch coupled between a kick resistor and the power supply controller, where the kick resistor functions to activate the power supply controller when the circuit is first turned on.

Abstract: A magnesium Mg--Al--RE magnesium alloy wherein an amount of a rare earth component may be reduced while optimial tensile strength and durability are obtained. The Alloy further includes a small calcium component. A high degree of creep resistance is obtained. Further, additional copper and/or zinc components may be introduced together, or singly for providing favorable tensile characteristics to the alloy material.

Abstract: Apparatus and method for manufacturing crushed sands from blast furnace melted slags including maintaining molten blast furnace melted slags out of contact with water while cooling the molten slags to a temperature between 850.degree. C. to 1300.degree. C. and then rapidly cooling the cooled slags with water thereby producing coarse grain hard quality water processed slags.