Abstract:
A DC power system is provided to generate the power from renewable energy and directly supplies the DC power to DC household appliances, thus saving energy that would be wasted during the conversion of DC to AC and back to DC and saving the cost of a rectifier or power factor corrector. The DC power system includes a generator, a DC/DC converter, a battery bank, a bi-directional inverter, a DC load and a controller.
Abstract:
A DC power system is provided to generate the power from renewable energy and directly supplies the DC power to DC household appliances, thus saving energy that would be wasted during the conversion of DC to AC and back to DC and saving the cost of a rectifier or power factor corrector. The DC power system includes a generator, a DC/DC converter, a battery bank, a bi-directional inverter, a DC load and a controller.
Abstract:
A dual directional sliding hinge is mounted in a portable device with a cover, a first base and a second base and has a main panel, a first sliding unit, a second sliding unit. The main panel is attached to the cover. The first sliding unit is attached to the first base. The second sliding unit is attached to the second base. When the first and second sliding units slide at the closing position, the cover and the first and second bases are folded to have a smallest volume. Since the first and second sliding units have different sliding distances when sliding to different directions, the functioning units on the first and second bases are revealed alternatively. Therefore, the user can decide to use different functioning units as desired.
Abstract:
A battery energy balance circuit and a battery charging bypass circuit is disclosed for batteries being charged at the same time to be charged equally. When the terminal voltages of the batteries are different, a controllable power device switch in the circuit switches on and off at a high frequency in order to reduce the input current to the batteries with higher terminal voltages and to increase the input current to the batteries with lower terminal voltages, achieving the goal of equal charging. The disclosed energy balance circuit can avoid damages to the batteries as a result of overcharging. When the number of batteries increases, one can expand the system in a modularized way to prevent inconvenience of circuit designs.
Abstract:
A protection frame has a frame body and a supporting arm. The frame body is mounted around the portable device. The supporting arm is mounted pivotally on the frame body to allow the user to adjust the propping angle of the portable device. Therefore, the portable device can be used at different visual angles as desired.
Abstract:
A dual directional sliding hinge is mounted in a portable device with a cover, a first base and a second base and has a main panel, a first sliding unit, a second sliding unit. The main panel is attached to the cover. The first sliding unit is attached to the first base. The second sliding unit is attached to the second base. When the first and second sliding units slide at the closing position, the cover and the first and second bases are folded to have a smallest volume. Since the first and second sliding units have different sliding distances when sliding to different directions, the functioning units on the first and second bases are revealed alternatively. Therefore, the user can decide to use different functioning units as desired.
Abstract:
A method for accessing a dual-port memory, wherein a data block programming procedure is performed upon the dual-port memory using status flags and check codes to determine the access sequence of the data so as to enable data exchange between two central processing units (CPU's) to be processed rapidly and correctly without interruption and thus to enhance the performance of the two CPU's.
Abstract:
A battery energy balance circuit and a battery charging bypass circuit is disclosed for batteries being charged at the same time to be charged equally. When the terminal voltages of the batteries are different, a controllable power device switch in the circuit switches on and off at a high frequency in order to reduce the input current to the batteries with higher terminal voltages and to increase the input current to the batteries with lower terminal voltages, achieving the goal of equal charging. The disclosed energy balance circuit can avoid damages to the batteries as a result of overcharging. When the number of batteries increases, one can expand the system in a modularized way to prevent inconvenience of circuit designs.
Abstract:
A protection frame has a frame body and a supporting arm. The frame body is mounted around the portable device. The supporting arm is mounted pivotally on the frame body to allow the user to adjust the propping angle of the portable device. Therefore, the portable device can be used at different visual angles as desired.
Abstract:
A method for accessing a dual-port memory, wherein a data block programming procedure is performed upon the dual-port memory using status flags and check codes to determine the access sequence of the data so as to enable data exchange between two central processing units (CPU's) to be processed rapidly and correctly without interruption and thus to enhance the performance of the two CPU's.