A load driving apparatus for driving a plurality of loads is provided. The load driving apparatus includes an output stage module, a load driving module, and an output stage selection module. The output stage module includes a plurality of output stages. Each of the output stages is coupled to a corresponding one of the loads. The load driving module is coupled to the output stage module and outputs a driving signal to drive one of the loads through the output stage module. The output stage selection module is coupled between the output stage module and the load driving module and selects one of the output stages in the output stage module, so that the load driving module drives the load which is coupled to the selected output stage through the selected output stage. Furthermore, a grayscale voltage generating circuit including the foregoing load driving apparatus is also provided.

A load driving apparatus for driving a plurality of loads is provided. The load driving apparatus includes an output stage module, a load driving module, and an output stage selection module. The output stage module includes a plurality of output stages. Each of the output stages is coupled to a corresponding one of the loads. The load driving module is coupled to the output stage module and outputs a driving signal to drive one of the loads through the output stage module. The output stage selection module is coupled between the output stage module and the load driving module and selects one of the output stages in the output stage module, so that the load driving module drives the load which is coupled to the selected output stage through the selected output stage. Furthermore, a grayscale voltage generating circuit including the foregoing load driving apparatus is also provided.

An equipment power management system in accordance with the present invention has a plurality of electrical devices and a control device. The electrical devices can operate in any one of multiple operational states different from each other in power consumption of a commercial power source. The control device switches the operational state of an electrical device to that of a smaller power consumption of the commercial power source in ascending order from the electrical device of the lowest priority when a receiving power amount of the whole equipment including the plurality of electrical devices exceeds a first threshold value until the receiving power amount falls below a second threshold value which is lower than or equal to the first threshold value.

An equipment power management system in accordance with the present invention has a plurality of electrical devices and a control device. The electrical devices can operate in any one of multiple operational states different from each other in power consumption of a commercial power source. The control device switches the operational state of an electrical device to that of a smaller power consumption of the commercial power source in ascending order from the electrical device of the lowest priority when a receiving power amount of the whole equipment including the plurality of electrical devices exceeds a first threshold value until the receiving power amount falls below a second threshold value which is lower than or equal to the first threshold value.

Techniques are disclosed herein for improved power meter disconnect switch operation, which may include opening and/or closing of the disconnect switch. In particular, for reasons such as reduction of electromechanical stress on the disconnect switch, the disconnect switch may be operated based, at least in part, on a voltage at the load side of the disconnect switch. For example, in some cases, the disconnect switch may be opened slightly before a zero crossover of a waveform corresponding to the load side voltage. As another example, in some cases, the disconnect switch may be closed slightly before or slightly after a zero crossover of a waveform corresponding to the load side voltage.

Techniques are disclosed herein for improved power meter disconnect switch operation, which may include opening and/or closing of the disconnect switch. In particular, for reasons such as reduction of electromechanical stress on the disconnect switch, the disconnect switch may be operated based, at least in part, on a voltage at the load side of the disconnect switch. For example, in some cases, the disconnect switch may be opened slightly before a zero crossover of a waveform corresponding to the load side voltage. As another example, in some cases, the disconnect switch may be closed slightly before or slightly after a zero crossover of a waveform corresponding to the load side voltage.

A building energy control system and method are provided. The building energy control system may include a user interface unit configured to display an energy control situation and an energy control guide that corresponds to the energy control situation to manage a building and a facility, and to receive an input according to the energy control guide and an energy control unit configured to control energy consumption in the building and the facility through control of the building and facility according to the input.

A building energy control system and method are provided. The building energy control system may include a user interface unit configured to display an energy control situation and an energy control guide that corresponds to the energy control situation to manage a building and a facility, and to receive an input according to the energy control guide and an energy control unit configured to control energy consumption in the building and the facility through control of the building and facility according to the input.

A power delivery system includes a programmable current limit switch circuit connected between a power supply and electronic control circuits that are susceptible to single event latch-up. The programmable current limit switch is connected in a power bus between the power supply and the electronic control circuits. The programmable current limit switch circuit removes power from the electronic control circuits when an over-current condition persists for a blank time period, and restores power to the electronic control circuits after a retry time period.

A power delivery system includes a programmable current limit switch circuit connected between a power supply and electronic control circuits that are susceptible to single event latch-up. The programmable current limit switch is connected in a power bus between the power supply and the electronic control circuits. The programmable current limit switch circuit removes power from the electronic control circuits when an over-current condition persists for a blank time period, and restores power to the electronic control circuits after a retry time period.