Abstract: In order to prevent a short circuit of top and bottom arms of a motor driving IC when noise is added to six control signals for controlling six switching elements, there is provided a semiconductor device for driving a motor, being sealed with resin as one package and comprising: six switching elements for driving a three-phase motor; three output terminals for outputting voltages to the three-phase motor; at least one driving circuit for driving the six switching elements; three control signal input terminals; and a function) of generating six control signals for control of the six switching elements based on three control signals inputted through the three control signal input terminals.

Abstract: The synchronous motor driving apparatus including position sensors provided in the synchronous motor, a current polarity detection circuit for detecting the polarities of the currents in the respective phase windings of the synchronous motor, an inverter driving the synchronous motor, a motor speed calculation unit calculating the rotational speed of the synchronous motor depending on the output signals from the position sensors, a speed control unit outputting a first voltage adjusting component (q-axis current command value Iq*) to cause the rotational speed of the synchronous motor to approach a speed command value and a phase control unit outputting a second voltage adjusting component (d-axis current command value Id*) to cause the phase differences between the phases of the position sensor signals and of the currents in the respective phase windings of the synchronous motor to become a predetermined value.

Abstract: A control apparatus and a semiconductor apparatus of AC motors capable of reducing torque ripple with a comparatively simple circuit corresponding to a high withstand voltage and capable of driving a motor at high efficiency even when the rotational speed or load has changed. The control apparatus detects first phase signals fixed in relative phase to induced voltages of the motor and current polarity signals, recognizes phase differences between them, generates second phase signals so as to make the phase differences approach zero to drive the motor at high efficiency, generates modulation wave signals having quasi-sinusoidal waveforms or trapezoidal waveforms on the basis of the second phase signals, compares the modulation wave signals with a carrier wave signal, and conducts PWM control on an inverter.

Abstract: A motor driving semiconductor device has: six switching elements for driving a three-phase motor; three output terminals for applying output voltages to three terminals of coils of the three-phase motor; drive circuits for driving the six switching elements; and six control signal input terminals for receiving six control signals for on/off control of the six switching elements, wherein the motor driving semiconductor device is formed by sealing at least one semiconductor chip in one package with resin, and further includes a dead time generation function of generating a dead time relative to the six control signals.

Abstract: When fuel supply is stopped while an engine is decelerating, pressure in each cylinder is detected using a pressure sensor, and the peak value of the pressure in each cylinder is determined. Also, an intake air amount is detected when the fuel supply is stopped, and the allowable range of the peak value is calculated based on the intake air amount. When the peak value of the pressure in a cylinder is in the allowable range, it is determined that a charged air amount in the cylinder is in a target amount range. When the peak value of the pressure in a cylinder is out of the allowable range, it is determined that the charged air amount in the cylinder is out of the target amount range, and a warning device is operated.

Abstract: A control apparatus and a semiconductor apparatus of AC motors capable of reducing torque ripple with a comparatively simple circuit corresponding to a high withstand voltage and capable of driving a motor at high efficiency even when the rotational speed or load has changed. The control apparatus detects first phase signals fixed in relative phase to induced voltages of the motor and current polarity signals, recognizes phase differences between them, generates second phase signals so as to make the phase differences approach zero to drive the motor at high efficiency, generates modulation wave signals having quasi-sinusoidal waveforms or trapezoidal waveforms on the basis of the second phase signals, compares the modulation wave signals with a carrier wave signal, and conducts PWM control on an inverter.

Abstract: When fuel supply is stopped while an engine is decelerating, pressure in each cylinder is detected using a pressure sensor, and the peak value of the pressure in each cylinder is determined. Also, an intake air amount is detected when the fuel supply is stopped, and the allowable range of the peak value is calculated based on the intake air amount. When the peak value of the pressure in a cylinder is in the allowable range, it is determined that a charged air amount in the cylinder is in a target amount range. When the peak value of the pressure in a cylinder is out of the allowable range, it is determined that the charged air amount in the cylinder is out of the target amount range, and a warning device is operated.

Abstract: An X-ray diffraction microscope apparatus (1) has an X-ray generating apparatus (2), a sample stage (3), a collimator (4) serving to suppress angle divergence, a two-dimensional X-ray detector (5) having an energy resolving power, an image processing apparatus, and an image recording and displaying apparatus (6). An angle divergence of diffracted X-rays is suppressed by moving a sample (7) and the two-dimensional X-ray detector (5) as close as possible via the collimator (4). The diffracted X-rays are measured and imaged in a state in which the two-dimensional X-ray detector (5) and the sample stage (3) are at a standstill without being moved.

Abstract: A liquid crystal display has a light guide plate having a light-emitting plane on its one end surface, a light source arranged on a side surface of the light guide plate, and a liquid crystal panel arranged opposite the light-emitting plane of the light guide plate. Deflection patterns are formed on a surface opposite the light-emitting plane of the light guide plate, and the deflection patterns are arranged so that two independent components on the surface opposite the light-emitting plane of the light guide plate are random. In a certain region on the surface opposite the light-emitting plane, when an average value of the number of the deflection patterns included in each region opposite each pixel of the liquid crystal panel is designated by ?n and a standard deviation is designated by ?n, their ratio satisfies the relationship: 0<?n/?n?0.154.

Abstract: A surface light source device capable of suppressing generation of bright line and preventing generation of crush of pattern forming on a light guide plate even when pressure is applied, includes a plurality of deflection patterns and diffusion patterns wherein the diffusion pattern is formed on the light source side of the deflection pattern. Further, the diffusion pattern is provided so as not to protrude outwards from the light guide plate from the plane opposite to the light-emitting plane and the diffusion pattern diffuses the light incident from a light guide direction to a direction different from the light guide direction seen from a direction perpendicular to the light emitting plane.

Abstract: A surface light source device includes a light guide plate having a light outgoing plane in one principal plane thereof; and a light source facing one end face of the light guide plate. A plurality of deflection patterns are formed in a surface facing the light outgoing plane of the light guide plate, the deflection pattern including an inclined plane located on a light source side and a re-incident plane substantially perpendicular to the light outgoing plane. Light emitted by the light source into the light guide plate is reflected by the inclined plane and then the light is outputted from the light outgoing plane. A tilt angle (?) of the inclined plane satisfies: 45°?[arc sin(sin ?/n)]/2???45°+[arc sin(sin ?/n)]/2, wherein ? is an angle formed between a direction of the peak brightness of the light outputted from the light outgoing plane and a direction perpendicular to the light outgoing plane, and n is a refractive index of the light guide plate, and wherein ? is within the range 6-15 degrees.

Abstract: A lens array capable of effectively converging light entering from a light source and constituting a liquid crystal device of a high contrast includes liquid crystal of a twisted nematic type sandwiched between a TFT substrate and a counter substrate. A micro lens array is formed in the counter substrate. Lenses constituting the micro lens array respectively have a shape of a rotational aspheric surface, and an optical center axis F thereof is tilted in a bright vision direction of the liquid crystal.

Abstract: The invention provides a method of sealing piezoelectric devices with covers capable of rapidly and securely sealing a plurality of packages or many packages of piezoelectric devices with covers. A piezoelectric device includes a package in which a piezoelectric vibrating reed is partially supported and fixed, and a cover fixed to the packages. In a method of sealing the packages with the covers, a plurality of the packages are arranged with the bottoms facing halogen lamps, so that the bottoms are irradiated with the light beams from the halogen lamps to thermally melt a brazing material disposed between the packages and the covers.

Abstract: A control apparatus and a semiconductor apparatus of AC motors capable of reducing torque ripple with a comparatively simple circuit corresponding to a high withstand voltage and capable of driving a motor at high efficiency even when the rotational speed or load has changed. The control apparatus detects first phase signals fixed in relative phase to induced voltages of the motor and current polarity signals, recognizes phase differences between them, generates second phase signals so as to make the phase differences approach zero to drive the motor at high efficiency, generates modulation wave signals having quasi-sinusoidal waveforms or trapezoidal waveforms on the basis of the second phase signals, compares the modulation wave signals with a carrier wave signal, and conducts PWM control on an inverter.

Abstract: A lens array capable of effectively converging light entering from a light source and constituting a liquid crystal device of a high contrast includes liquid crystal of a twisted nematic type sandwiched between a TFT substrate and a counter substrate. A micro lens array is formed in the counter substrate. Lenses constituting the micro lens array respectively have a shape of a rotational aspheric surface, and an optical center axis F thereof is tilted in a bright vision direction of the liquid crystal.

Abstract: To provide a method of sealing piezoelectric devices with covers capable of rapidly and securely sealing a plurality of packages or many packages of piezoelectric devices with covers.

Abstract: A semiconductor device is provided that simplifies wiring pattern and is capable of being etched through an etching hole as a concavity is produced over a short time period. A dielectric film 12 is formed so as to shield the concavity formed upon the upper surface of a silicon substrate 10. A circuit pattern that has a thermoelectric conversion element 18 is formed upon the dielectric film. The upper surface of the silicon wafer becomes a (100) surface, and a first etching hole 16 extending in the <110> direction of the silicon substrate and a second etching hole 17 extending in the <−110> direction are formed. These holes intersect in a cross shape. Shapes of the first and second etching holes become parallelograms which have oblique sides tilted with respect to <110> and <−110>. Imaginary rectangles passing though the vertices of the first and second etching holes are continuous.

Abstract: A semiconductor device is provided that simplifies wiring pattern and is capable of being etched through an etching hole as a concavity is produced over a short time period. According to the semiconductor device of the present invention, a dielectric film 12 is formed so as to shield the concavity formed upon the upper surface of a silicon substrate 10. A circuit pattern that has a thermoelectric conversion element 18 is formed upon the dielectric film. The upper surface of the silicon wafer becomes a (100) surface, and a first etching hole 16 extending in the <110> direction of the silicon substrate and a second etching hole 17 extending in the <−110> direction are formed. These holes intersect in a cross shape. Shapes of the first and second etching holes become parallelograms which have oblique sides tilted with respect to <110> and <−110>. Imaginary rectangles passing though the vertices of the first and second etching holes are continuous.

Abstract: In a recording apparatus for stably conveying a recording medium to a recording portion by a convey belt, the recording medium is passed through a nip of a pair of separation supply rollers and enters into a nip between a convey belt and a driven roller and thereafter is conveyed by the convey belt to a recording portion. When a leading end of the recording medium is detected by a recording medium detect sensor, the supply roller is disengaged from the separation roller, so that the convey belt is not subjected to the influence of the pair of separation supply rollers via the recording medium and when a trailing end of the recording medium is detected by a recording medium detect sensor, the driven roller is disengaged from the convey belt, so that the recording medium is not subjected to conveyance resistance from the driven roller.

Abstract: A sheet feeding device is provided with a sheet feeding unit for feeding sheets supported on a sheet support means, and sheet separator means provided downstream of the sheet feeding unit with respect to the sheet feeding direction, the sheets fed by the sheet feeding unit being separated one by one by the sheet separator and fed. The sheet separator is comprised of an inclined surface against which the sheet fed by the sheet feeding unit abuts, a dash member provided downstream of the inclined surface with respect to the sheet feeding direction and against which the leading end of the sheet riding over the inclined surface abuts, and a resilient member for displaceably supporting the dash member when the sheet abuts against the dash member.