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2112 results about "Negative power" patented technology
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Organic EL pixel circuit
InactiveUS6924602B2Avoid it happening againPrevent stateStatic indicating devicesElectroluminescent light sourcesNegative powerCapacitor
A discharge transistor (TFT3) which connects the upper end of an organic EL element (EL) and a negative power source (VEE) and a control transistor (TFT4) which connects the upper end of a storage capacitor (SC) with a power source (PVDD) are provided. These transistors (TFT3, TFT4) are turned on by the upper gate line, so that the capacitor of the organic EL element (EL) is discharged prior to the selection of the line for these transistors.
Owner:SANYO ELECTRIC CO LTD
Accommodative intraocular lens
A two-optic accommodative lens system. The first lens has a negative power and is located posteriorly against the posterior capsule. The periphery of the first optic contains a pair of clasps. The second optic is located anteriorly to the first optic and is of a positive power. The peripheral edge of the second optic contains a pair of locking arms that fit into the clasps contained on the periphery of the first optic to lock the second optic onto the first optic, but allow for rotation of the arms within the clasps. Hinge structures on the locking arms allow the second optic to move relative to the first optic along the optical axis of the lens system in reaction to movement of the ciliary muscle.
Owner:ALCON INC
Accommodative intraocular lens
A two-optic accommodative lens system. The first lens has a negative power and is located posteriorly against the posterior capsule. The periphery of the first optic contains a pair of clasps. The second optic is located anteriorly to the first optic and is of a positive power. The peripheral edge of the second optic contains a pair of locking arms that fit into the clasps contained on the periphery of the first optic to lock the second optic onto the first optic, but allow for rotation of the arms within the clasps. Hinge structures on the locking arms allow the second optic to move relative to the first optic along the optical axis of the lens system in reaction to movement of the ciliary muscle.
Owner:ALCON INC
Accommodative intraocular lens
A two-optic accommodative lens system. The first lens has a negative power and is located posteriorly within the capsular bag and laying against the posterior capsule. The periphery of the first lens contains a pair of generally T-shaped haptics oriented along a vertical meridian of the capsular bag and having a generally rectangular slot within the top portion of the “T”. The first lens further having a plurality of elongated haptics oriented along a horizontal meridian of the capsular bag. The second lens is located anteriorly to the first lens outside of the capsular bag and is of a positive power. The peripheral edge of the second lens contains a pair of encircling haptics having a notched tab sized and shape to fit within the slots in the haptics on the first lens to lock the second lens onto the first lens. Hinge structures on the encircling haptics allow the second lens to move relative to the first lens along the optical axis of the lens system in reaction to movement of the ciliary muscle.
Owner:ALCON INC
Intraocular implant devices
A deformable intracapsular implant device for shaping an enucleated lens capsule sac for use in cataract procedures and refractive lensectomy procedures. In one embodiment, the intraocular implant devices rely on thin film shape memory alloys and combine with the post-phaco capsular sac to provide a biomimetic complex that can mimic the energy-absorbing and energy-releasing characteristics of a young accommodative lens capsule. In another embodiment, the capsular shaping body is combined with an adaptive optic. The peripheral capsular shaping body carries at least one fluid-filled interior chamber that communicates with a space in a adaptive optic portion that has a deformable lens surface. The flexing of the peripheral shaping body in response to zonular tensioning and de-tensioning provides an inventive adaptive optics mechanism wherein fluid media flows between the respective chambers “adapts” the optic to increase and decrease the power thereof. In one embodiment, the capsular shaping body carries a posterior negative power adaptive optic that can be altered in power during accommodation to cooperate with an independent drop-in exchangeable intraocular lens.
Owner:ALCON INC
Accommodating Intraocular Lens
InactiveUS20100228344A1Minimal incisionSimplified lens exchangeIntraocular lensIntraocular lensCataract surgery
A deformable intracapsular implant device for shaping an enucleated lens capsule sac for use in cataract procedures and refractive lensectomy procedures. In one embodiment, the intraocular implant devices rely on thin film shape memory alloys and combine with the post-phaco capsular sac to provide a biomimetic complex that can mimic the energy-absorbing and energy-releasing characteristics of a young accommodative lens capsule. In another embodiment, the capsular shaping body is combined with an adaptive optic. The peripheral capsular shaping body carries at least one fluid-filled interior chamber that communicates with a space in a adaptive optic portion that has a deformable lens surface. The flexing of the peripheral shaping body in response to zonular tensioning and de-tensioning provides an inventive adaptive optics mechanism wherein fluid media flows between the respective chambers “adapts” the optic to increase and decrease the power thereof. In one embodiment, the capsular shaping body carries a posterior negative power adaptive optic that can be altered in power during accommodation to cooperate with an independent drop-in exchangeable intraocular lens.
Owner:ALCON INC
Image pickup lens, image pickup apparatus, and mobile terminal
The present invention relates to an image pickup lens suitable for a small-sized image pickup apparatus and to an image pickup apparatus and a mobile terminal. An image pickup lens relating to the present invention is provided for forming an image of an object on a photoelectrical converter of a solid-state image pickup element. An image pickup lens includes: a first lens with a positive power, including a convex surface facing the object side; an aperture stop; a second lens with a negative power, including a concave surface facing the image side; a third lens with a positive or negative power; a fourth lens with a positive power, including a convex surface facing the image side; and a fifth lens with a negative power, including a concave surface facing the image side. The surface of the fifth lens facing the image side is an aspheric surface and includes an inflection point. The image pickup lens satisfies the predetermined condition relating to a focal length of the first lens.
Owner:KONICA MINOLTA INC
Highly efficient class-g amplifier and control method thereof
InactiveUS20110084760A1Improve efficiencyLow costNegative-feedback-circuit arrangementsGain controlAudio power amplifierNegative power
A highly efficient class-G amplifier includes an amplifier circuit coupled between a positive power rail and a negative power rail to amplify an audio input signal of the class-G amplifier, and a boost inverting power converter to convert a supply voltage to a positive rail voltage and a negative rail voltage on the positive and negative power rails. The boost inverting power converter includes a boost inverting power stage coupled to the positive and negative power rails, and a controller to switch the boost inverting power stage between a boost mode and an inverting mode. An audio level detector detects the audio input signal for the controller to adjust the positive and negative rail voltages. The class-G amplifier has higher efficiency and requires lower cost because it does not need a charge pump.
Owner:RICHTEK TECH
Optical scan unit, image projector including the same, vehicle head-up display device, and mobile phone
An optical scan unit (10) is configured to include a light source (11), a divergent light conversion element (12) having such positive power as to convert divergent light from the light source (11) into convergent light to form a spot on a projection plane, an optical deflector (13) deflecting a light beam from the divergent light conversion element (12) to a first scan direction and a second scan direction which is orthogonal to the first scan direction, and a deflection angle conversion element 14 (14) having such negative power as to convert a deflection angle of the light deflected by the optical deflector (13).
Owner:RICOH KK
DC-DC converter
ActiveUS20050047175A1Efficient power electronics conversionDc-dc conversionDc dc converterNegative power
In a DC to DC converter, first and second primary windings are magnetically coupled to a first secondary winding. Third and fourth primary windings are magnetically coupled to a second secondary winding. The first and second primary windings are magnetically coupled to the first secondary winding. The third and fourth primary windings are magnetically coupled to the second secondary winding. The first and third primary windings are coupled in series to form a first coil member. The second and fourth primary windings are coupled in series to form a second coil member. One end of the first coil member is coupled to the first positive power line. A first switching element is coupled between the first negative power line and the other end of the first coil member. A first capacitor is coupled between the first negative terminal and one end of the second coil member.
Owner:DENSO CORP +1
Illumination optical system for endoscope
ActiveUS20160195706A1Increase brightnessLarge refractive powerMechanical apparatusSurgeryLight guideNegative power
An illumination optical system for an endoscope includes two light guides disposed in an insertion tube in a first direction to sandwich a center of the insertion tube therebetween; an observation window on a tip end face of the insertion tube; two concave lens parts having negative powers sandwiching the observation window at positions facing end faces of two light guides on the tip end face of the insertion tube. The end face of each of the two light guides has a smaller width in the first direction than a width in a second direction perpendicular to the first direction; each of the two concave lens parts has a larger negative power in the first direction than a negative power thereof in the second direction; and of illumination light which has propagated through each of the two concave lens parts after being emitted from each of the two light guides.
Owner:HOYA CORP
Amplifier system with on-demand power supply boost
InactiveUS20020153940A1Less powerMore efficientCharge amplifiersAmplifier modifications to raise efficiencyDriver circuitAudio power amplifier
An amplifier system with on-demand power supply boost includes an amplifier circuit for receiving an input signal and a charge pump connected to positive and negative power supplies and having predetermined supply voltages and being responsive to the input signal for increasing beyond the predetermined supply voltages the supply voltage applied to the amplifier in response to an increase in the input signal and a tracking charge pump usable in the amplifier system which includes a charge storage device; a unidirectional isolation device interconnecting the charge storage device and one pole of a power supply; a driver circuit responsive to an input signal and interconnected between both poles of the power supply; the power supply having predetermined power supply voltages; and a bias circuit for biasing the driver circuit to charge the charge storage device in the charge mode and in the boost mode, for increasing beyond the predetermined power supply voltages, the supply voltage supplied by the storage device to an external load in response to an increase in the input signal.
Owner:ANALOG DEVICES INC
System and methods for providing a driving circuit for active matrix type displays
InactiveUS7091939B2Increasing costIncreasing power consumptionStatic indicating devicesElectroluminescent light sourcesActive matrixNegative power
The present invention provides an organic electroluminescence element driving circuit that is capable of realizing application of reverse bias without increasing power consumption and cost. The connected relationship between a power supply potential Vcc and the GRD is changed by manipulating switches. With this arrangement, application of reverse bias to an organic electroluminescence element can be realized without newly preparing additional power supplies such as a negative power supply, and the like, whereby the life of an organic electroluminescence element can be increased.
Owner:SEIKO EPSON CORP
IGBT drive protection circuit
The invention discloses an IGBT drive protection circuit, which comprises positive and negative power supplies, a signal and feedback optical coupler, a signal amplification circuit, an undervoltage detection and indication circuit, an IGBT overcurrent detection and reset circuit, a soft turn-off circuit, a fault latch and retaining circuit and the like. The undervoltage detection circuit if the power supply at the receiving terminal of the signal optical coupler and the positive / negative power supply are undervoltage, and an LED is lighted if the power supply at the receiving terminal of thesignal optical coupler and the positive / negative power supply are not undervoltage to enable a drive circuit. The IGBT overcurrent detection circuit can sample a collector-emitter voltage drop duringthe period when the IGBT is turned on, detect time delay according to high-low dynamic adjustment of the collector-emitter voltage drop, start a soft turn-off process and perform self locking to ensure soft turn off when the collector-emitter voltage drop exceeds a preset threshold, retain the overcurrent fault state, keep the IGBT turned off during the retaining period, transmit the state to a control circuit and keep time set between millisecond and second.
Owner:SHENZHEN CLOU DRIVE TECH CO LTD
Camera lens
The invention relates to a camera lens. The camera lens has the total effective focal length f and entrance pupil diameter EPD, and the camera lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from the object side to the image side along the optical axis. The first lens has positive power, and the object side face of the first lens is a convex face; the second lens has positive power, and the object side face and the image side face of the second lens are convex faces; the third lens has negative power, the fourth lens and the fifth lens each have positive power or negative power, the sixth lens has positive power or negative power, and the image side face of the sixth lens is a concave face at the paraxial position; the seventh lens has negative power, and the image side face of the seventh lens is a concave face at the paraxial position, wherein the total effective focal length f and entrance pupil diameter EPD meet the formula f / EPD<=1.9.
Owner:ZHEJIANG SUNNY OPTICAL CO LTD
Optical scanner and image forming apparatus
An optical scanner includes a light source, an optical coupler, an optical line image unit, a deflector, and an optical scanning unit. The optical scanning unit includes scanning lenses that guide the beams to a surface to be scanned. A surface on the deflector side of the scanning lens closest to a deflection reflecting surface has a negative power in a vertical scanning direction, and is a special toric surface in which a radius of curvature in a vertical scanning changes from an optical axis of the lens surface toward a periphery of the horizontal scanning direction. An F number of the beams toward the surface to be scanned of the scanning lens in the vertical scanning direction is larger in a peripheral part than in a central part in an effective scanning width.
Owner:RICOH KK
Amplifier system with on-demand power supply boost
InactiveUS6636103B2Less powerMore efficientCharge amplifiersAmplifier modifications to raise efficiencyDriver circuitAudio power amplifier
An amplifier system with on-demand power supply boost includes an amplifier circuit for receiving an input signal and a charge pump connected to positive and negative power supplies and having predetermined supply voltages and being responsive to the input signal for increasing beyond the predetermined supply voltages the supply voltage applied to the amplifier in response to an increase in the input signal and a tracking charge pump usable in the amplifier system which includes a charge storage device; a unidirectional isolation device interconnecting the charge storage device and one pole of a power supply; a driver circuit responsive to an input signal and interconnected between both poles of the power supply; the power supply having predetermined power supply voltages; and a bias circuit for biasing the driver circuit to charge the charge storage device in the charge mode and in the boost mode, for increasing beyond the predetermined power supply voltages, the supply voltage supplied by the storage device to an external load in response to an increase in the input signal.
Owner:ANALOG DEVICES INC
Color-corrected projection lenses for use with pixelized panels
Owner:3M INNOVATIVE PROPERTIES CO
Accommodative intraocular lens system
A two-optic accommodative lens system. The first lens has a negative power and is located posteriorly within the capsular bag and lying against the posterior capsule. The periphery of the first lens is attached to a ring-like structure having a side wall. The second lens is located anteriorly to the first lens within of the capsular bag and is of a positive power. The peripheral edge of the second lens contains a plurality of haptics that are arranged in a spiral pattern and project posteriorly from the second lens and toward the first lens. The haptics are relatively firm, yet still flexible and ride within the side wall of the ring-like structure, so that flattening or steepening of the capsule in reaction to movement of the ciliary muscle and corresponding shrinkage of the capsular bag causes the second lens to move along the optical axis of the lens system.
Owner:NOVARTIS AG
Optical scanning device and imaging apparatus implementing the same
InactiveUS7050210B2Control changesReduce cost and power consumptionInking apparatusPictoral communicationNegative powerLight beam
Owner:RICOH KK
Wide-angle, high-zoom-ratio zoom lens
InactiveUS7177092B2Quality improvementImprove abilitiesTelevision system detailsColor television detailsNegative powerPositive power
The invention relates to a four- or five-group zoom lens that ensures wide-angle performance, high zoom ratios and high quality with a more reduced number of lenses than ever before. The zoom lens comprises, in order from its object side, a first lens group G1 having positive power, a second lens group G2 having negative power, a third lens group G3 having positive power, a fourth lens group G4 having negative power and a fifth lens group G5 having positive power. The fourth lens group G4 comprises one lens. For zooming, all the spacings between the respective lens groups vary and the first lens group G1 moves in such a way as to arrive at the object side at the telephoto end position rather than at the wide-angle end position.
Owner:OM DIGITAL SOLUTIONS CORP
Image pickup unit for endoscope
An image pickup unit which consists of an objective optical system and a solid-state image pickup device: the objective optical system being composed of a first negative lens unit comprising a first meniscus lens element having a convex surface on the object side and negative power, a second positive lens unit comprising a convex lens element and an aperture stop disposed between the first lens unit and the second lens unit and this image pickup unit having a small outside diameter, allowing a field angle to be changed little due to variations of parts and an assembling variation, and having a maximum field angle of 150° or larger.
Owner:OLYMPUS CORP
Imaging lens and imaging apparatus using imaging lens
Owner:JIANGXI OFILM OPTICAL CO LTD
Integrated control method for micro-grid load and energy accumulation
InactiveCN103311940AReduce Oscillating PhenomenaGood dynamic response speedEnergy industryAc network load balancingMicrogridEngineering
The invention discloses a high-precision load control method based on mirror image droop and virtual inertia control. Controllable loads and energy accumulation in a micro-grid are integrally controlled, load control precision is increased, purposes of the controllable loads are expanded, micro-grid dependence on energy accumulation power and capacity is relieved, energy accumulation configuration is lowered, a 'negative power source' participates in peer-to-peer control of a distributed power source during micro-grid operation, and 'general energy accumulation' participates in micro-grid emergency control under fault conditions such as island converting to grid-connection. By the method, stable micro-grid frequency is achieved, tie line power fluctuation is restrained, and accordingly safe and stable operation capability of the micro-grid is increased.
Owner:SOUTHEAST UNIV
Light-emitting device and illumination apparatus
InactiveUS20100270935A1Positively effectElectrical apparatusElectroluminescent light sourcesNegative powerEffect light
A light-emitting device and an illumination apparatus are disclosed. A plurality of LED elements are connected in series between positive and negative lines, and first bypass capacitor is connected in parallel to the LED elements respectively. Each series circuit of a predetermined number of LED elements is connected in parallel to second bypass capacitors. As a result, with the negative power line set as a grounding point, the AC impedance at connection points of the series circuit of the LED elements against the ground is reduced. Thus, the erroneous lighting or “flicker” of each LED which otherwise might be caused by an external noise is prevented.
Owner:TOSHIBA LIGHTING & TECH CORP +1
Imaging lens and imaging apparatus using imaging lens
ActiveUS20100142062A1Improve environmental resistanceIncrease manufacturing costOptical elementsNegative powerImaging lens
An imaging lens is provided and includes, in order from the object side, a front group having a negative power, a stop, and a rear group having a positive power. The front group includes, in order from the object side, a first negative lens having a meniscus shape with a concave surface on an image side, a second negative lens, and a third positive lens. The rear group includes, in order from the object side, a fourth positive lens, a fifth negative lens having a meniscus shape with a concave surface on the object side, and a sixth positive lens. An Abbe number of each of the first lens, the second lens, the fourth lens, and the sixth lens at the d-line is equal to or larger than 40, and an Abbe number of each of the third lens and the fifth lens at the d-line is equal to or smaller than 40. Each lens constituting the front group and the rear group is a single lens.
Owner:JIANGXI OFILM OPTICAL CO LTD
Capacitor-input positive and negative power supply circuit
InactiveUS7209374B2Reduce adverse effectsAdverse effect of pumpingAc-dc conversion without reversalConversion with intermediate conversion to dcCapacitanceNegative power
There is provided a power supply circuit having a simple configuration which is capable of eliminating an adverse effect due to pumping operation. The capacitor-input positive and negative power supply circuit is comprised of diodes, switching circuits connected in parallel with the diodes, and control circuits that control the switching circuits such that the switching circuits conduct during a time period over which the diodes conduct.
Owner:YAMAHA CORP
Image pickup lens and image pickup apparatus
ActiveUS8355215B2Compact and inexpensive structureSmall F numberOptical elementsCamera lensNegative power
Disclosed is an image pickup lens having the following disposed from an object side in the order listed below: a first lens having a negative power and a meniscus shape with a concave surface on an image side; a second lens having a positive power; a third lens having a negative power; a fourth lens having a positive power; a fifth lens having a positive power; and a sixth lens having a negative power and a meniscus shape with a concave surface on the object side. The image pickup lens satisfies Conditional Expression (1) given below when a focal length of the first lens is taken as f1 and a focal length of the second lens is taken as f2−3.0<f1 / f2<−1.6 (1).
Owner:TIANJIN OFILM OPTO ELECTRONICS CO LTD
Imaging lens
ActiveUS7295386B2Improve imaging effectMore compact configurationOptical elementsCamera lensConditional expression
An imaging lens is provided and includes: in order from an object side of the imaging lens, a first lens having a convex surface on the object side and having a positive power; a second lens having a concave surface on the object side and having a negative power; a third lens having a positive power; and a fourth lens having a convex surface on the object side near a paraxial axis and having a meniscus shape. The imaging lens satisfies conditional expressions specified in the specification.
Owner:TIANJIN OFILM OPTO ELECTRONICS CO LTD
Imaging lens and imaging device including the imaging lens
It is to provide an imaging lens and an imaging device including the imaging lens in which the imaging lens can maintain excellent optical performance, while achieving sufficient reduction in size and weight.The imaging lens comprises, in order from an object side to an image surface side, a diaphragm, a first lens that is a biconvex lens having a positive power, a second lens having a negative power, a third lens having a positive power, and a fourth lens that is a biconcave lens, wherein a condition expressed by 0.7≦FL / f1≦3.0 (where, FL: focal distance of the entire lens system, and f1: focal distance of the first lens) is to be satisfied.
Owner:ENPLAS CORP
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