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A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 8189632 | Laser emission device and image display device using the same A laser emission device comprises a plurality of laser elements, a plurality of laser driving power supplies, optical elements which uniformize the laser light amount distributions of laser lights, plural light-receiving elements, a measurement unit which measures a... | 05/29/2012 |
| 8184670 | Smart linear pulsed laser diode driver, and method In a pulsed laser diode driver an energy storage capacitor is continuously being charged to a supply voltage Vr. When a pulse is initiated, energy stored in the capacitor is delivered to the laser diode load. The capacitor voltage Vd at the end of a pulse is used to... | 05/22/2012 |
| 8165179 | Closed loop laser control The radiance of a laser is a function of drive current. The radiance is also a function of other factors, such as age and temperature. A laser projection device adjusts laser drive parameters using a gradient descent operation. The device parameters may be adjusted ... | 04/24/2012 |
| 8139618 | Light emission device, light emission device driving method, and projector A light emission device includes: first and second clad layers sandwiching an active layer; a first electrode connected with the first clad layer; and second electrodes connected with the second clad layer, at least part of the active layer forms gain areas correspo... | 03/20/2012 |
| 8121161 | Laser diode driver driven in shunt mode by signals complementary to each other A laser driver to drive an LD in the shunt mode and driven with signals complementary to each other is disclosed. The driver includes two FETs of the enhancement and a terminator. Two FETs are connected in parallel with the LD and driven by the complementary signals... | 02/21/2012 |
| 8121160 | Driver circuit for semiconductor laser diode driven in differential mode A driver circuit for a semiconductor laser diode (LD) is disclosed, in which the driver circuit drives the LD in the differential mode and lowers the power consumption thereof. The driver circuit includes a differential unit to provide the modulation current to the ... | 02/21/2012 |
| 8102889 | Multi-chamber gas discharge laser bandwidth control through discharge timing A method and apparatus are disclosed for controlling bandwidth in a multi-portion laser system comprising a first line narrowed oscillator laser system portion providing a line narrowed seed pulse to an amplifier laser system portion, may comprise utilizing a timing... | 01/24/2012 |
| 8094695 | Current drive circuit A current drive circuit according to the present invention includes: a first current source and a second current source (I101, I102); a first current mirror (CM103) for generating a first mirror current of a current (I2) generated by ... | 01/10/2012 |
| 8089996 | Light intensity boost for subpixel enhancement Techniques are disclosed that enable fine features such as serifs and narrow strokes of texts to be produced by xerographic devices, for example. The fine features may be generated by subpixels which are produced when a pulse width used to image a pixel is shorter t... | 01/03/2012 |
| 8073030 | Shunt driver circuit for semiconductor laser diode A driver circuit for the laser diode is disclosed. The driver circuit has the shunt configuration with a switching transistor connected in parallel to the laser diode to shunt the current flowing in the laser diode. In the present invention, the bias for the switchi... | 12/06/2011 |
| 8040930 | Drive circuit for semiconductor light emitting element, and light source device, lighting device, monitor device, and image display device using the drive circuit A drive circuit for driving a semiconductor light emitting element includes a board, a first pattern formed in a first layer of the board so as to be electrically connected to an anode of the semiconductor light emitting element, and a second pattern formed in a sec... | 10/18/2011 |
| 8009709 | DC coupled driver with active termination A DC coupled driver is described for modulating a vertical cavity surface emitting laser at high speeds with active termination. High speed and low total power dissipation is achieved by improving the driver immunity to pulse reflections, which can arise due to impe... | 08/30/2011 |
| 8009710 | Laser driver circuit, method for controlling a laser driver circuit, and use A laser driver circuit comprising an amplifier device with a plurality of switchable subamplifiers, which can be or are connected to an output for connection of a laser, ith an analog switching device for switching of analog input signals, a plurality of analog inpu... | 08/30/2011 |
| 8000361 | Laser system The higher efficiency and lower power consumption are realized in a laser system for generating a high-power short-pulse laser beam. The laser system includes a laser oscillator for generating a pulse laser beam by laser oscillation, plural amplifiers for sequential... | 08/16/2011 |
| 7991032 | Laser drive Disclosed herein is a laser driver including a light emission controlling section configured to stop generation of a control voltage by a control voltage generating section, causing a given voltage corresponding to a magnitude of a reference current to be outputted ... | 08/02/2011 |
| 7991030 | Method for deriving precise control over laser power of an optical pickup unit, and associated automatic power calibration circuit A method for deriving precise control over laser power of an optical pickup unit (OPU) includes: providing an analog-to-digital converter (ADC) within an automatic power calibration (APC) circuit to derive a path gain and/or a path offset from the APC circuit; and s... | 08/02/2011 |
| 7991031 | Injection seeded laser ratio loop control In a method of controlling an injection-seeded laser, a response of the laser is sampled at a plurality of different laser current values. A threshold current and a slope efficiency of the sampled response are then estimated, and a bias current and a modulation curr... | 08/02/2011 |
| 7978742 | Methods for operating diode lasers Methods for operating diode lasers are provided. According to one method, the diode laser comprises a wavelength selection section, a gain section and a saturable absorber. The method comprises applying a hybrid-control signal comprising a hybrid-control DC bias to ... | 07/12/2011 |
| 7978741 | Optical transmitter with a shunt driving configuration and a load transistor operated in common gate mode The invention provides an optical transmitter that prevents the high frequency components in the driving signal from leaking to the external power supply in a wider frequency range. The transmitter provides a shun driving configuration with a switching transistor co... | 07/12/2011 |
| 7961767 | System and method to regulate high current radiation sources Disclosed is a high current radiation system. The system includes a high current radiation source to generate radiation and an analog circuit to generate, based, at least in part, on an input signal representative of the present current level delivered to the high c... | 06/14/2011 |
| 7957440 | Dual pulse-width medical laser A laser device that includes a dual pulse-width laser-pumping circuit generates long and short laser pulses. The laser-pumping circuit employs a single power supply with dual high voltage outputs that are selectable under control of a user. The laser device convenie... | 06/07/2011 |
| 7953132 | Laser driver circuit and laser display A laser driver circuit comprising a current supply circuit for supplying a laser diode with a current is provided. The current supply circuit comprises a voltage-to-current converter circuit, a current output line for outputting the current generated by the voltage-... | 05/31/2011 |
| 7949025 | Laser optics integrated control system and method of operation A controller (320) for controlling various operational parameters of the Laser Module (303). The modulation drive signal (300) causes the circuits in the driver (301) to send a signal to the output (302) so that the laser can send ... | 05/24/2011 |
| 7940823 | Laser turn-on accelerator independent of bias control loop bandwidth An accelerator circuit is incorporated in a laser diode system for accelerating the turn-on operation of the laser diode independent of the control loop bandwidth of the laser diode system. The accelerator circuit provides a boost current to a compensation capacitor... | 05/10/2011 |
| 7899098 | Monitoring method and device for monitoring a forward voltage of a laser diode in a laser diode driver integrated circuit (IC) A laser diode driver IC of a transmitter or transceiver is provided with circuitry for monitoring the forward voltage of the laser diode or laser diodes of the transmitter or transceiver to enable the health of the laser diode or diodes to be assessed in real-time. | 03/01/2011 |
| 7899099 | Laser drive circuit and use A laser drive circuit and use of digital-to-analog converters is provided, each with a current input and a current output to set current values of partial currents switchable by means of digital channel signals to provide a laser current pulse at least on the basis ... | 03/01/2011 |
| 7889771 | Driving device and method A driving device including a light emitter, a biasing circuit, a light receiver, an automatic control system, and an alternating current (AC) path is disclosed. The light emitter generates an optical signal. The biasing circuit generates a driving signal to activate... | 02/15/2011 |
| 7885300 | Methods and circuits for driving large off-chip loads A method and system to drive large off-chip loads, such as, for example, laser diodes, wherein the system includes an integrated circuit coupled to an external differential diode load. Alternatively, the external diode load may be driven single-ended. The integrated... | 02/08/2011 |
| 7876797 | Apparatus and method for measurement of dynamic laser signals A system contains a laser output measurement circuit used in a laser control system (210). The circuits contain a photodiode (109), sample and hold amplifier (202), IC with synchronizer and delay circuits (206), and an analog to digital c... | 01/25/2011 |
| 7873087 | Light source, light source device, laser image forming device and integrated circuit The light sources according to the present invention include a laser oscillator including a semiconductor laser, a drive circuit for the semiconductor laser, an ACC circuit, an APC circuit, and a switch, and a starting drive current storage device, and is controlled... | 01/18/2011 |
| 7864827 | Single ended laser driving system and method Disclosed are various embodiments of a single ended laser driving circuit. One embodiment includes a thin oxide gate switched by a data signal, the thin oxide gate configured to output a switching signal. The embodiment also includes a thick oxide current source con... | 01/04/2011 |
| 7856039 | Semiconductor device and semiconductor laser driving device In a semiconductor device, a switching current generator circuit generates and outputs a switching current such that a voltage input to a switching current setting terminal is equal to a voltage input to a switching current control terminal, and a bias current gener... | 12/21/2010 |
| 7848373 | Drive circuit for semiconductor light emitting element, and light source device, lighting device, monitor device, and image display device using the drive circuit A drive circuit for a semiconductor light emitting element used for a light source device adapted to output a laser beam converted using a wavelength conversion element adapted to generate a second harmonic wave, includes a switching element connected to a power sup... | 12/07/2010 |
| 7843979 | Damping of parasitic resonance using a resistive parallel conductor Circuits and methods for damping out parasitic resonance within a packaged integrated circuit (IC) are provided. A conductive path including a resistor and a conductor is added in parallel with a conductive path that provides power to components within a die of the ... | 11/30/2010 |
| 7835412 | Laser control system, optical scanning device, and image forming apparatus A control system for a laser source driven by a direct current drive voltage includes a system control board, a laser driver, and a power stabilizing circuit. The system control board is configured to output a control signal based on input data. The laser driver is ... | 11/16/2010 |
| 7830935 | Laser A laser (10) provided with a discharge activation power supply (11) supplied with power from a 3-phase AC power line, the discharge activation power supply (11) provided inside it with three first capacitors (12a, 12b... | 11/09/2010 |
| 7830934 | Multi-chamber gas discharge laser bandwidth control through discharge timing A method and apparatus are disclosed for controlling bandwidth in a multi-portion laser system comprising a first line narrowed oscillator laser system portion providing a line narrowed seed pulse to an amplifier laser system portion, may comprise utilizing a timing... | 11/09/2010 |
| 7822085 | Method of controlling a diode device for use in optical storage systems A system and method is provided which compensates for the effects of relaxation oscillations and turn-on delays of diode laser devices. In particular, there is provided a method and system for tuning the shape of the power profile of an output optical signal and its... | 10/26/2010 |
| 7822086 | Laser projection temperature compensation The temperature of a laser diode changes in response to video content across a line of a displayed image, and the radiance changes as a function of temperature. An adaptive model estimates the temperature of the laser diode based on prior drive current values. For e... | 10/26/2010 |
| 7813392 | Light transmitter and automatic power control circuit thereof A light transmitter and an auto-control circuit thereof are provided. The circuit includes a driving module and a feedback module. The driving module is coupled to the feedback module and a load. The driving module provides a driving current for driving the load. Th... | 10/12/2010 |
