摘要:
A cellular phone covering a plurality of frequency bands, includes (a) an antenna, (b) a high-frequency circuit, (c) an antenna-matching circuit electrically connecting in series between the antenna and the high-frequency circuit, and (d) a first unit which varies a ground length in accordance with a frequency band in which the cellular phone makes communication with others, the ground length being defined as a length of a ground area for the antenna-matching circuit.
摘要:
A method for driving a display is provided which is capable of reducing current consumption. In the method above, a scanning frequency in a self-emissive display is changed based on a display content to be displayed in the self-emissive display.
摘要:
A low-temperature liquefied gas outflow device wherein an outflow nozzle having a plurality of through-holes is provided through the base of a heat-insulating container having an opening at the top, and a cover member closing the opening, a control device for selectively opening or closing any desired number of the plurality of through-holes provided in the outflow nozzle is provided. The heat-insulating container has a level sensor located within the heat-insulating container, a liquefied gas supply conduit running through the cover member, a vaporized-gas exhaust conduit provided in the cover member, and a check valve inserted into the liquefied gas supply conduit, operating in response to a signal from the level sensor. The control device for selectively opening or closing the through-holes comprises a plurality of valve elements for selectively closing the through-holes, and an elevation cylinder for controlling the operation of the plurality of valve elements. The plurality of valve elements are arranged concentrically with each other, or arranged separately in the horizontally direction from each other.
摘要:
An acceleration sensor includes a weight portion having a recess section and a solid section, beam portions, a movable electrode provided on the opposite surface of the weight portion from an open surface of the recess section to extend over the recess section and the solid section, a first fixed electrode arranged at the opposite side of the movable electrode from the recess section, and a second fixed electrode arranged at the opposite side of the movable electrode from the solid section. The acceleration sensor detects acceleration using a change in capacitance between the movable electrode and the fixed electrodes caused by rotation of the weight portion. The beam portions are shifted toward the recess section such that an angle between a perpendicular line extending from a gravity center position of the weight portion to the rotation axis and a surface of the movable electrode becomes equal to 45 degrees.
摘要:
Arrangement of an internal component (not shown) arranged in the vicinity of the top side is different from that of the hinge side of an image element protective screen (2). An actuator (5) is fixed to the top side of the image element protective screen (2) and an actuator (4) is fixed to the hinge side of the image element protective screen (2). Since Arrangement of the internal component in the vicinity of the actuator is different, different sound pressure frequency characteristics or the like are experienced when each actuator is driven independently. When the actuators (4, 5) are driven simultaneously, sound pressure frequency characteristics and vibration frequency characteristics can be flattened. Isolation between the vibration speed of a vibrator near one actuator and the vibration speed of a vibrator in the region near the other actuator that are produced by respective actuators is set at 10 dB or above.
摘要:
A cellular phone covering a plurality of frequency bands, includes (a) an antenna, (b) a high-frequency circuit, (c) an antenna-matching circuit electrically connecting in series between the antenna and the high-frequency circuit, and (d) a first unit which varies a ground length in accordance with a frequency band in which the cellular phone makes communication with others, the ground length being defined as a length of a ground area for the antenna-matching circuit.
摘要:
A portable radio telephone comprises a receiver section including at least an RF amplifier and a first frequency mixer. The telephone also comprises a battery which supplies a first voltage to the receiver section when the telephone is in portable use. When the telephone is mounted on a vehicle, a vehicle battery applies a second voltage which is higher than the first voltage, to the RF amplifier and to the frequency mixer. By this higher voltage supply, the intermodulation characteristic and reception sensitivity of the receiver section can be improved in the vehicle-mounted use. On the other hand, battery saving can be achieved by the lower voltage supply in the portable use.
摘要:
A method of preventing the atmosphere from entering a heat-insulating container adapted to temporarily reserve a low-temperature liquefied gas, wherein a dry gas is constantly supplied to the inside of the heat-insulating container when it is in an inoperative state, in order to maintain the inside of the heat-insulating container in a dry gas atmosphere having a pressure slightly higher than the atmospheric pressure. The dry gas is a vaporized gas of a low-temperature liquefied gas of the same kind as the low-temperature liquefied gas to be used. The dry gas is led out in the gas phase from a supply container for supplying the low-temperature liquefied gas to be used, or is a gas obtained by vaporizing a part of the low-temperature liquefied gas to be used, outside the supply container.
摘要:
In a low-temperature liquefied gas constant outflow device having a heat-insulating container having an opening at the top, a cover member closing the opening of the heat-insulating container, a low-temperature liquefied gas outlet which runs through the base of the heat-insulating container, a level sensor which detects the level of low-temperature liquefied gas in the heat-insulating container, and a vaporized-gas exhaust conduit which opens from the cover member, the improvement wherein a pressure absorbing container is located within the heat-insulating container, a low-temperature liquefied gas supply conduit and a vaporized-gas exhaust conduit are both inserted into the pressure absorbing container through the cover member, a low-temperature liquefied gas outlet is provided in the pressure absorbing container, and a check valve is provided in the low-temperature liquefied gas supply conduit, which opens or closes in response to a signal from the level sensor.
摘要:
A method of detecting the type of a battery pack in a mobile electronic device is provided, which detects the type of a battery pack connected in a mobile electronic device even if no dedicated terminals are provided to a battery pack. (a) A first battery pack connectable to the body is provided. (b) A second battery pack connectable to the body and different in characteristic from the first pack is provided. Each of the first and second packs has a battery cell, first and second terminals respectively connected to high- and low-potential side terminals of the cell, a third terminal, and a temperature detection element connected across the first and second terminals. (c) The body is provided with fourth, fifth, and sixth terminals connectable respectively to the first, second, and third terminals of the first or second battery pack. The body has a resistive voltage divider circuit connected among the fourth, fifth, and sixth terminals. (d) The first or second pack is connected to the body in such a way that the fourth, fifth, and sixth terminals of the body are connected to the first, second, and third terminals of the first or second battery pack, respectively. (c) An output voltage of the divider is detected to thereby generate a detection result. (f) Whether the first or second pack is connected to the body is detected based on the detection result.