摘要:
A fan control system includes first and second adjacent fans, first and second motors configured to rotate the first and second fans, and a control unit configured to control rotational speeds of the first and second motors in order to control rotational speeds of the first and second fans. The first and second motors are energized such that the rotational speeds of the first and second fans reach target rotational speeds prior to increasing the rotational speeds of the first and second fans to required rotational speeds. The target rotational speeds are lower than the required rotational speeds. The first and second motors are energized such that the rotational speeds of the first and second fans reach the required rotational speeds after the rotational speeds of the first and second fans reach the target rotational speeds.
摘要:
A motor drive control device is configured to control driving of a brushless DC motor including a stator having drive coils, a rotor having plural magnetic poles, and plural position detecting units that output position detection signals representing position of the rotor with respect to the stator. The motor drive control device includes a drive voltage generating unit configured to generate and output drive voltages to the motor to drive the motor. An abnormality detecting unit can be used to detect abnormality of the position detection signals. When abnormality of at least one of the position detection signals has been detected by the abnormality detecting unit, the motor drive control device can drive the motor based on at least one of the remaining position detection signals excluding the position detection signal that has been detected as abnormal.
摘要:
In order to provide a photoelectric conversion apparatus, which is an apparatus excellent in reading speed, high S/N, high tone level, and low cost, the photoelectric conversion apparatus has a photoelectric conversion circuit section comprising a plurality of photoelectric conversion elements, switching elements, matrix signal wires, and gate drive wires arranged on a same substrate in order to output parallel signals, a driving circuit section for applying a driving signal to the gate drive wire, and a reading circuit section for converting the parallel signals transferred through the matrix signal wires to serial signals to output them, wherein the reading circuit section comprises at least one analog operational amplifier connected with each of the matrix signal wires, transfer switches for transferring output signals from the respective matrix signal wires, output through each amplifier, reading capacitors, and reading switches for successively reading the signals out of the reading capacitors in the form of serial signals.
摘要:
A high-rigidity, light-weight bottom structure for a vehicle body is disclosed. The structure comprises a rectangular framework and an X-shaped frame member positioned inside the rectangular framework. The framework in the vicinity of an area where front wheels or rear wheels are provided is formed by a triangular frame part.
摘要:
A large liquid crystal display (100) comprises a light guide plate (3) arranged on the back side of a liquid crystal panel (1). The front surface of the light guide plate (3) is flat, while the back surface thereof is concave. The upper and lower end faces of the light guide plate (3) respectively facing hot cathode fluorescent lamps (2a, 2b) have a convex shape projecting toward the respective lamps. White light from the fluorescent lamps is incident on the upper and lower end faces of the light guide plate directly or by being reflected by reflectors (4a, 4b), and propagates within the light guide plate while being reflected by the front and back surfaces of the light guide plate. At the front surface of the light guide plate, a part of the white light is directed toward the back side of the liquid crystal panel (1) by a light guide portion (5).
摘要:
A solid state image device with a high frame rate, that can restrain image distortion etc. from taking place in case of filming of moving pictures or rapid filming and moreover can output signals excellent in the S/N proportion in a stable fashion, and a camera using it is provided. A frame memory apparatus having a plurality of memories respectively corresponding with respective pixels of a photoelectric conversion apparatus and an apparatus of recording signals of respective pixels of the photoelectric conversion apparatus into the memory elements of the frame memory apparatus are included. The memory element is configured at least by a sample hold circuit, the sample hold circuit has a capacitor apparatus and an impedance conversion apparatus and the impedance conversion apparatus is configured by an operational amplifier.
摘要:
An electronic device such as a portable television receiver includes a main body having a display and a frame portion provided around the display. In addition, the portable television receiver further includes a frame panel detachable to the frame portion, and on the frame portion, there is provided a frame detecting unit for detecting a type of the frame panel attached to the frame portion, so that a display position of a screen image relating to the operation on the display, or a screen image for a function of display is changed in accordance with the detected result of the frame detecting unit.
摘要:
An outboard motor includes a housing unit and an engine disposed above the housing unit. The engine defines a first exhaust passage to discharge exhaust gases from the engine and a lubricant passage through which lubricant flows. A lubricant reservoir member is disposed below the engine within the housing unit to define a lubricant reservoir therein. The lubricant passage communicates with the lubricant reservoir. A second exhaust passage, which can be defined on an outer surface of the lubricant reservoir member, extends along the height of the lubricant reservoir. The housing unit defines third and fourth exhaust passages. The third exhaust passage is arranged between the first and second exhaust passages. The fourth exhaust passage is arranged downstream of the second exhaust passage. The housing unit defines an exhaust discharge port at an end of the fourth exhaust passage. The exhaust discharge port communicates with the atmosphere.
摘要:
A memory card apparatus has an EEPROM as a semiconductor memory. Each time data is written in the EEPROM, link data representing a recording location of the data is written and managed in a link table. The link table has a flag region with a flag which is set when data write in the EEPROM is requested and is reset when the link data has completely been written in the link table. In case of card removal during operation or power failure, the flag set in the flag region of the link table is not reset and remains. Thus, by checking the flag area of the link table, the occurrence of card removal during operation or power failure can be detected, and various countermeasures can be conducted. Thus, the correspondency between the recorded contents in the EEPROM and the contents in the link table can be maintained as much as possible.