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69results about How to "Suppress complexity" patented technology

Illumination device, image display device, and projector

ActiveUS20070019909A1Increase in complexity of increaseLow costColor television detailsCoupling light guidesDisplay deviceLaser light
An image display device includes: a first face; a laser light source device emitting laser light; and a diffractive optical element on which the laser light emitted from the laser light source device is incident, generating diffracted light from the incident laser light, and illuminating the first face with the diffracted light, the first face is provided at a position on which zero-order light emitted from the diffractive optical element is not incident, and an image is displayed by light via the first face.
Owner:SEIKO EPSON CORP

Movable body apparatus, exposure apparatus and optical system unit, and device manufacturing method

The upper end of a static gas bearing member of a wafer side seal unit is connected to an edge section on the outgoing side of an exposure beam of a chamber in an air tight state via bellows, and the lower end surface is in a state forming a predetermined clearance with a wafer and a wafer holder. By this arrangement, the inside of the chamber is isolated from the outside. Accordingly, it becomes possible to maintain a vacuum environment in the periphery of the optical path of the exposure beam without arranging a vacuum chamber to house a wafer, a wafer holder, and a wafer stage, which allows the size of the entire exposure apparatus to be reduced, and also makes it easy to have access to the vicinity of the wafer stage.
Owner:NIKON CORP

Semiconductor device and method of manufacturing the same

A first semiconductor element portion for switching a first current includes a first channel surface having a first plane orientation. A first region of a semiconductor layer includes a first trench having the first channel surface. A first gate insulating film covers the first channel surface with a first thickness. A second semiconductor element portion for switching a second current smaller than the first current includes a second channel surface having a second plane orientation different from the first plane orientation. A second region of the semiconductor layer includes a second trench having the second channel surface. A second gate insulating film covers the second channel surface with a second thickness larger than the first thickness.
Owner:MITSUBISHI ELECTRIC CORP

Liquid Ejection Apparatus And Control Method For Liquid Ejection Apparatus

A printer controller outputs plural drive signals including respective series of drive pulses, the timing points of which are different from one another, to a head control unit side, and outputs a multiplexed signal resulting from multiplexing change signals corresponding to the respective drive signals to a head control unit side, and the head control unit includes a control signal demultiplexing unit which demultiplexes the multiplexed signal into the change signals corresponding to respective nozzle rows, and an actuator control unit which, on the basis of each of the demultiplexed change signals, selects one of the drive pulses included in one of the drive signal which corresponds to the demultiplexed change signal, and applies the selected drive pulse to a piezoelectric element included in one of the nozzle rows which corresponds to the drive signal corresponding to the demultiplexed change signal.
Owner:SEIKO EPSON CORP

Fixed-wing unmanned aerial vehicle landing control method based on self-adaptive dynamic inverse

The invention discloses a fixed-wing unmanned aerial vehicle landing control method based on self-adaptive dynamic inverse. The method comprises: establishing an unmanned aerial vehicle nonlinear model under wind disturbance; designing an inner loop control law based on an adaptive dynamic inverse method according to an inner loop differential equation of the unmanned aerial vehicle; designing a track angle loop control law based on a nonlinear dynamic inverse method; designing an ideal relative trajectory of unmanned aerial vehicle landing; designing a relative trajectory loop control law based on a nonlinear dynamic inverse method; and correcting the track inclination angle instruction of the tail end guide section according to the estimated value of the ideal landing point. Parameter uncertainty of the unmanned aerial vehicle model can be effectively suppressed, complex nonlinearity and control coupling of the model are overcome, interference of complex wind disturbance such as shipwake flow on the unmanned aerial vehicle track is resisted, deck movement of a ship is rapidly tracked, and the ship landing precision and the ship landing success rate are effectively improved.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Intelligent drilling machine control system for driller

The invention provides an intelligent drilling machine control system for a driller. The intelligent drilling machine control system for the driller comprises a well drilling parameter acquisition module, a well drilling rotating speed optimization control system, a well drilling bit pressure optimization control system, a well drilling top drive / rotary table electric drive control system and an automatic bit feeding alternate-current variable-frequency control system. The intelligent drilling machine control system has the beneficial effects that modeling is conducted on drill column movement, and the relevant factors such as the relation of the drill bit speed and friction torque and the rotary inertia of a rotary table are considered, so that downhole stick-slip and other complex vibration phenomena can be effectively inhibited; and in accordance with the requirements of a drilling technology, real-time well drilling data are acquired, the deviation of the given rotating speed and the output rotating speed and the deviation of the given bit pressure and the output bit pressure are subjected to self-optimization compensation, and the deviation is made to tend to zero, so that optimum control over the rotating speed and the bit pressure is conducted, the well drilling cost is lowered, and the well drilling efficiency is improved.
Owner:北京四利通控制技术股份有限公司

A data communication method and communication equipment

The invention discloses a data communication method and communication equipment. The method comprises the steps that a data symbol, a first pilot frequency sequence and a second pilot frequency sequence sent by a sending end are received, the power of the first pilot frequency sequence is larger than that of the second pilot frequency sequence, the frequency domain position corresponding to a spectral line with the strongest power in received data is determined, and the spectral line with the strongest power is a spectral line corresponding to the first pilot frequency sequence; he frequency shift of the data received by the receiving end is determined according to the difference value between the frequency domain position corresponding to the strongest spectral line and the frequency domain position of the first pilot frequency sequence at the transmitting end, and frequency shift compensation is performed on the received data; And the phase noise of the data received by the receivingend is determined according to the values, which are not zero, in the first pilot frequency sequence and the second pilot frequency sequence, phase noise compensation is carried out on the received data, and decoding is performed to obtain data information corresponding to the data symbol sent by the sending end. Compared with an existing phase noise compensation scheme, the method has the capability of eliminating inherent interference and performing frequency offset compensation at the same time.
Owner:HUAZHONG UNIV OF SCI & TECH

Inverter device of rotating electrical machine, and driving method for rotating electrical machine

An inverter device of a rotating electrical machine drives a multiphase rotating electrical machine having the variable number of rotations using a switching element provided for each phase. An example of the inverter device of the rotating electrical machine includes: a frequency setting unit for determining and setting a carrier frequency of a carrier signal for use in driving the switching element for each phase depending on the state of each phase of the rotating electrical machine for each specified electrical angle obtained by equally dividing a cycle of an electrical angle; and a signal generation unit for generating a drive signal for drive of the switching element of each phase using the carrier signal of the carrier frequency set for each phase by the frequency setting unit. The carrier frequency of each phase is an integral multiple of the phase voltage frequency at the specified electrical angle.
Owner:TOYOTA IND CORP

Warehousing/shipping-operation support system, warehousing/shipping-operation support method, and nontransitory computer-readable medium

A warehousing / shipping-operation support system selects, for a first article in a warehousing / shipping operation, by using acquired positional information of an operator, a sign closer to a position of the operator among signs in the vicinity of a storage location of the article, and the warehousing / shipping-operation support system selects, for a second and following articles, by using the storage-location information of the article whose warehousing / shipping has been completed as the positional information of the operator, a sign closer to the position of the operator among the signs in the vicinity of the storage location of the article.
Owner:SATO HLDG CORP
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