Patent application number | Description | Published |
20080231219 | MOTOR DRIVE APPARATUS AND MOTOR DRIVE METHOD - To reduce noise by limiting a current peak value to a predetermined value or less and by smoothing the waveforms of drive currents during the current limitation, switching control means ( | 09-25-2008 |
20080278629 | IMAGE QUALITY ADJUSTMENT DEVICE AND IMAGE QUALITY ADJUSTMENT METHOD - The present invention provides an image quality adjustment device capable of generating an image of a highest image quality for an input image. The image quality adjustment device which adjusts image quality of an input image by applying different image quality settings to the input image includes: pieces of order information each of which indicates an order for applying plural image quality settings, a selection unit which selects optimal order information having a maximum evaluation value, and an adjustment unit which adjusts an image quality of input image based on the optimal order information. | 11-13-2008 |
20090218972 | METHOD AND APPARATUS FOR DETECTING REVERSE CURRENT, AND METHOD AND APPARATUS FOR DRIVING MOTOR - A reverse current detection apparatus determines whether an electrical conduction control to a motor coil of a motor is in a predetermined state based on a timing signal representing a timing at which to conduct a source current or a sink current through the motor coil and a control signal for a half bridge in a power stage, and compares the output voltage of the power stage with a threshold value, so as to detect the presence/absence of a reverse flow of a phase current based on these results. A motor driving apparatus for driving a motor under a PWM control includes a rectification switching section for switching a rectification scheme from one to another based on the reverse current detection apparatus and a detection result thereof. | 09-03-2009 |
20090243526 | DEVICE AND METHOD FOR DETECTING BACK ELECTROMOTIVE FORCE PHASE AND DEVICE AND METHOD FOR CONTROLLING EXCITATION - In a back electromotive force phase detecting device, a timing generating unit generates a timing signal indicating a start timing, an intermediate timing and an end timing of a 180-degree electrical angle period in a detection target phase, from an excitation pulse signal. A difference calculating unit receives the timing signal, and calculates a difference between a total PWM control period of the detection target phase during a first-half 90-degree period, and a total PWM control period of the detection target phase during a second-half 90-degree period. In an excitation control device, a control unit changes the capability of driving a motor based on an output of the back electromotive force phase detecting device. | 10-01-2009 |
20100052572 | LIGHT EMITTING ELEMENT DRIVING APPARATUS - The N light emitting element groups each include one or more light emitting elements. The power source circuit includes a control input terminal and supplies the power source voltage to the N light emitting element groups. The N current driving circuits, each including a feedback output terminal, generate N drive currents for driving the respective N light emitting element groups and generate main feedback voltages at the feedback output terminals based on the power source voltage. The main feedback circuit applies a main feedback signal to the control input terminal based on the N main feedback voltages. The auxiliary feedback circuit applies an auxiliary feedback signal to the control input terminal based on the power source voltage. The power source circuit adjusts the power source voltage based on at least one of the main feedback signal and the auxiliary feedback signal. | 03-04-2010 |
20100060177 | LOAD DRIVING APPARATUS - The load driving apparatus according to the present invention includes a load current setting signal generating section, a load current generating section, a reference voltage generating section and a drive voltage generating section. The load current setting signal generating section generates a desired load current setting signal. The load current generating section generates a load current based on the load current setting signal to drive the load. The reference voltage generating section generates a reference voltage based on the load current setting signal. The drive voltage generating section generates a drive voltage, supplies the drive voltage to the load, generates a between-both-terminals voltage between both terminals of the load current generating section based on the drive voltage and controls the drive voltage so that the difference between the between-both-terminals voltage and the reference voltage becomes small. | 03-11-2010 |
20110080397 | BACKLIGHT DRIVE APPARATUS AND VIDEO DISPLAY APPARATUS - A backlight drive apparatus for current driving a plurality of strings has a period in which at least one of the strings is a current driven idly during a liquid crystal OFF period, in addition to a current driving period in which video information is displayed via liquid crystals. A failure detection section can monitor stabilized detection voltages in the period when current driven idly and detects failure state of the backlight panel. | 04-07-2011 |
20110117364 | PRESSURE-SENSITIVE ADHESIVE SHEET - The present invention relates to a pressure-sensitive adhesive sheet including: a substrate layer including a film which contains at least a urethane polymer; and a pressure-sensitive adhesive layer disposed on at least one side of the substrate layer, in which the pressure-sensitive adhesive sheet has a residual stress of 23 N/cm or lower after having been held in a 10% elongated state for 60 seconds. | 05-19-2011 |
20110171410 | RELEASE LINER-ATTACHED PRESSURE-SENSITIVE ADHESIVE SHEET - The present invention relates to a release liner-attached pressure-sensitive adhesive sheet including a pressure-sensitive adhesive sheet having a substrate and a pressure-sensitive adhesive layer and a release liner arranged on the pressure-sensitive adhesive layer, in which the substrate includes a composite film containing a urethane polymer, the release liner is a layered product including a layer A which constitutes a surface of a pressure-sensitive adhesive layer side and a layer B that supports the layer A, and the release liner has an average linear expansion coefficient between 25° C. and 40° C. of 7×10 | 07-14-2011 |
20110171477 | MULTILAYER SHEET - The present invention relates to a multilayer sheet including a substrate layer and a coat layer arranged on at least one side of the substrate layer and formed using a fluoroethylene vinyl ether alternating copolymer represented by the following formula in which X represents fluorine, chlorine or bromine, Ra represents hydrogen or a C1-C10 alkyl group, Rb represents a C1-C16 alkyl group, Re represents a C1-C16 alkylene group, each of m and n is an integral number, and a weight average molecular weight of the fluoroethylene vinyl ether alternating copolymer is selected within the range of from 1,000 to 2,000,000, in which the substrate layer includes a film including a urethane polymer: | 07-14-2011 |
20110291589 | MULTI-INPUT DIFFERENTIAL AMPLIFIER AND LIGHT EMITTING ELEMENT DRIVING DEVICE - A multi-input differential amplifying device of the present invention includes: a differential amplifier having an inverting input terminal and a non-inverting input terminal; and an input portion configured to apply a first input voltage to a first input terminal that is one of the inverting input terminal and the non-inverting input terminal and apply a second input voltage to a second input terminal that is the other input terminal, the first input voltage corresponding to first input signals that are a plurality of input signals for the first input terminal, the second input voltage corresponding to a second input signal that is one input signal for the second input terminal. The input portion is configured to correct an offset voltage between the first input voltage and the second input voltage. | 12-01-2011 |
20110291634 | OVERCURRENT PROTECTION CIRCUIT AND OVERCURRENT PROTECTION METHOD - An overcurrent protection circuit includes: a determiner configured to determine whether or not the switch current exceeds a predetermined threshold, that is, the switch current is an overcurrent state when the switching element is turned ON; an OFF period setting counter configured to increase or decrease a counter output depending on a determination result of the determiner; and a drive signal generator configured to generate a drive signal of the switching element such that a length of an ON timing interval of the switching element corresponds to the counter output of the OFF period setting counter. | 12-01-2011 |
20120070659 | PRESSURE-SENSITIVE ADHESIVE SHEET - The present invention relates to a pressure-sensitive adhesive sheet containing: a substrate layer comprising a film which contains at least a urethane polymer, and a pressure-sensitive adhesive layer, in which the substrate layer has: (a) a work of 35 to 160 N·mm, the work being calculated from a product of a move amount and a stress until 10% elongation when the substrate layer is elongated at a tensile speed of 200 mm/min; and (b) a stress relaxation time of 30 sec or less, the stress relaxation time being a time for which the stress, after the substrate layer is elongated until 10% at a tensile speed of 200 mm/min and the elongation is held in that state, decreases to 36.8% of the maximum stress. | 03-22-2012 |
20120074856 | LIGHT-EMITTING ELEMENT DRIVING DEVICE - Short circuit failures and open circuit failures of light-emitting elements used for the backlight in an LCD panel can be reliably and easily detected. The voltage at the node between each series-connected light-emitting element array and a drive circuit is detected as a monitored voltage. A maximum detector detects the highest and a minimum detector detects the lowest of these monitored voltages. Short circuit or open circuit failure of a light-emitting element is detected by comparing the voltage difference between the maximum detector output and the minimum detector output with a specific reference voltage. | 03-29-2012 |
20150022089 | LIGHT-EMITTING ELEMENT DRIVING DEVICE - Short circuit failures and open circuit failures of light-emitting elements used for the backlight in an LCD panel can be reliably and easily detected. The voltage at the node between each series-connected light-emitting element array and a drive circuit is detected as a monitored voltage. A maximum detector detects the highest and a minimum detector detects the lowest of these monitored voltages. Short circuit or open circuit failure of a light-emitting element is detected by comparing the voltage difference between the maximum detector output and the minimum detector output with a specific reference voltage. | 01-22-2015 |