52results about How to "Power is wasted" patented technology

A device, mounted on a hydraulic excavator, for allowing each of first and second electric motors (13), (14) to generate power by using electric power supplied from a power supply having a predetermined capacity, and actuating a boom cylinder (6), an arm cylinder (7), etc. using the generated power. Electric motor controllers (24), (25), respectively control power that is generated by the electric motors (13), (14) so that, in machine-operation, powers generated by the electric motors (13), (14) may be equal to or less than predetermined rated outputs, and the total amount of powers generated simultaneously by the electric motors (13), (14) correspond to the maximum capacity of the power supply.

A charge pump provides a multiplication factor of 4 / 3 by using a three-phase mode of operation. In a first mode, first and second capacitors are charged from an input voltage while a third capacitor drives the output voltage based on stored charge in the third capacitor. In a second mode, the voltage potential across the first capacitor is added to the input voltage to generate the output voltage. In a third mode, the voltage potential across the first capacitor is subtracted from the sum of the input voltage and the voltage potential across the second capacitor to generate the output voltage. Operated in this manner, the first, second, and third capacitors will provide the desired 4 / 3× voltage multiplication. This relatively low multiplication factor can be beneficial in applications such as white LED driver circuits, particularly where the input voltage is provided by a battery.

To achieve thinner liquid crystal display panels and to reduce the power consumption for turning on a backlight during an image display operation to a minimum amount, a controller controls display operations of a main display panel and a sub-display panel via a first driver and a second driver. Based on the controlling of the display operations, the controller performs lighting control of LEDs of a backlight corresponding to the dimensions and position of the display panel used for image display. Accordingly, the backlight can be turned on for the display panel used for image display by consuming a minimum amount of power. Furthermore, the backlight includes a light-guiding plate and multiple LEDs and can emit light from both sides of the backlight, thus achieving reduction in thickness.

Power supply voltages are selectively modulated to correspond with degraded input voltages to a logic device. Modulated power supply voltages are provided to transistors within the logic device, so that the degraded input voltages supplied to the transistors are sufficient to turn the transistors substantially on or off. Leakage currents are prevented thereby from flowing across the transistors.

A method and apparatus for receiving a service guide for a user terminal in a broadband wireless access system. The method includes transmitting, by the user terminal, a service guide request message to a MultiCast and BroadCast Service (MCBCS) server, and receiving, from the MCBCS server, a service guide response message including a mapping table. The mapping table identifies application layer name tags versus Medium Access Control (MAC) layer name tags with respect to broadcast channels, each of the MAC layer name tags being a Multicast Connection IDentifier (MCID) and each of the application layer name tags being a broadcast channel Internet Protocol (IP).

An electronic device has a first signal path, a first power supply path, and a connector that transmits to an external device the input signal on which the voltage has been superposed. The device also has a first power supply switch inserted into the first power supply path and an amplitude detector that detects at the connector an amplitude of the input signal, a control section that determines, based on a detection output from the amplitude detector, which a connection condition of the external device to the connector is a first condition in which the external device is not connected to the connector or a second condition in which the external device is connected to the connector. Based on the connection condition, the control section turns on or off the first power supply switch.

An image processor keeps itself capable of executing a communication process with an external apparatus even in an energy-saving state, and offers a job reservation function while reducing power consumption as much as possible. The image processor has an energization switching circuit that makes switchover separately in energizing / deenergizing each of a plurality of function blocks, which execute a job, independent of energization of a Network Interface Card (NIC). The NIC has functions of counting the present time, obtaining a scheduled time and reserved job information on a reserved job to be executed at the scheduled time, identifying the reserved job to be started for execution on the basis of a counted time and the scheduled time included in the reserved job information, and starting up a function block needed for execution of the identified reserved job through control over the energization switching circuit.

A method and apparatus for creating a modified dynamic flip-flop avoids the power waste created by prior art dynamic flip-flops by including a conditional pre-charge control circuit and method. When the modified dynamic flip-flop is in a holding mode, i.e., in the clock disable state, the modified dynamic flip-flop does not use power pre-charging and discharging the internal dynamic node every cycle.