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"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 8148903 | Light emitting diode driving circuit A LED driving circuit that may control current flow into an LED on a current path according to the amount of light sensed from the LED. An LED driving circuit for driving at least one LED may include at least one of: An optical sensor for receiving light emitted fro... | 04/03/2012 |
| 8093817 | Method and system for lighting control A method and a system for controlling at least one lighting arrangement (2), in which the lighting arrangement modulates the light (6, 16, 18) it emits by lighting arrangement data, which contains an identification code identifying the lighting arrange... | 01/10/2012 |
| 8084948 | Method for dimming a light generatng system for generating light with a variable color A method for dimming an illumination system (20) capable of emitting light (L) with a variable color is described. The illumination system (20) comprises three dimmable light sources (21, 22, 23) generating respective lights (L1, L2 | 12/27/2011 |
| 7839091 | Light source control device, illuminaton device, and liquid crystal display device A light emission device capable of holding a uniform color in various environments is provided. A light source control device has a light detection device for detecting emission brightness of light sources that emit different colors and controlling emission brightne... | 11/23/2010 |
| 7369060 | Distributed intelligence ballast system and extended lighting control protocol A ballast for use in a multi-ballast lighting system wherein the ballasts are coupled together by a digital communication network. The ballast comprises a power circuit portion for providing an electrical current to power a lamp. The ballast further includes a senso... | 05/06/2008 |
| 7362322 | Pixel circuit, display apparatus and electronic apparatus equipped with current driving type light-emitting device A display apparatus is provided with a current driving type light-emitting device and a driving device for controlling a driving current flowing through the light-emitting device for each pixel of the display apparatus. The display apparatus consists of power source... | 04/22/2008 |
| 7352786 | Apparatus for driving light emitting element and system for driving light emitting element In case of driving each of light emitting parts of a surface emitting laser, each of light emitting parts is made to be in forward-bias state and switches appropriately change bias voltage, which is lower than laser oscillation threshold voltage, and drive voltages,... | 04/01/2008 |
| 7347008 | System and method for controlling the operating parameters of a setting system A system includes a device for setting a material, such as ink, deposited on a textile or graphic. A programmable logic controller includes a power intensity selector and an application module and is operably connected to the device. The application module is capabl... | 03/25/2008 |
| 7321385 | Surgical lighting control and video system A surgical light system (10) includes a lighthead (44) coupled to a suspension arm (41′) adapted for mounting to a surface (14) of a surgical room. A bulb (130) is disposed in the lighthead. A processor (120) in the lighth... | 01/22/2008 |
| 7301286 | Method of detecting an arc in a glow-discharge device and apparatus for controlling a high-frequency arc discharge In a method of detecting arc discharge in a glow-discharge apparatus GD that has a high-frequency power source PS, a cutting pulse is output for time T1 to the high-frequency power source PS to stop a supply of power to the glow-discharge apparatus GD, when dVr/dtâˆ... | 11/27/2007 |
| 7291983 | Ballast and igniter for a lamp having larger storage capacitor than charge pump capacitor A ballast according to the present invention operates in an ignition state, a warm-up state, and a steady state for igniting and powering a lamp. The ballast comprises an igniter that ignites the lamp during the ignition state and a switching power inverter, for exa... | 11/06/2007 |
| 7265494 | Intelligent user interface with touch sensor technology An electronic circuit including a microchip for use as an intelligent user interface also comprises touch sensor technology that differentiates between proximity and physical contact events to activate and control various loads including light bulbs, products with r... | 09/04/2007 |
| 7245295 | Device and method of dynamic driving for liquid crystal display A dynamic driving device is disclosed. The device enhances the display effect of a dynamic image on a liquid crystal display by dynamically adjusting the driving voltage applied to a liquid crystal display's Graphic Processing Unit (GPU) or Central Processing Unit (... | 07/17/2007 |
| 7235766 | Electromagnetic radiation generation based on an object characteristic Method and system for generating electromagnetic radiation wherein one or more attributes of the electromagnetic radiation are adjusted based on a characteristic of the object being illuminated. The object characteristic can be obtained based on a sensed property of... | 06/26/2007 |
| 7204418 | Pulsed illumination in imaging reader A target is illuminated with high intensity light pulses to make the target appear stationary to a solid state imager of an imaging reader to improve reader performance at high swipe speeds of the target. ... | 04/17/2007 |
| 7183727 | Optical and temperature feedbacks to control display brightness An illumination control circuit allows a user to set a desired brightness level and maintains the desired brightness level over temperature and life of a light source. The illumination control circuit uses a dual feedback loop with both optical and thermal feedbacks... | 02/27/2007 |
| 7164359 | Networked RF tag for tracking freight The invention disclosed provides a method, system, and associated tag for detection and tracking of inanimate and animate objects. The novel method broadly comprises the steps of: a) attaching a low radio frequency detection tag to each of the objects, each tag comp... | 01/16/2007 |
| 7116055 | Apparatus and methods for making spectroscopic measurements of cathode fall in fluorescent lamps Apparatus and methods are disclosed for measuring cathode fall within a fluorescent lamp that contains an electrode and a gas. A level of cathode fall associated with the electrode may be identified based on an intensity and wavelength of radiation emitted by the ga... | 10/03/2006 |
| 7113541 | Method for software driven generation of multiple simultaneous high speed pulse width modulated signals Systems and methods can provide, in one aspect, a method for modulating the pulse width of control signals generated on a plurality of separate channels. In one practice, the methods described herein are suitable for execution on a microprocessor or micro controller... | 09/26/2006 |
| 7095309 | Thermoelastic actuator design The invention concerns thermoelastic designs incorporating and expansive element formed from material selected in accordance a procedure involving the derivation of an indicator of the material's potential effectiveness for each application. ... | 08/22/2006 |
| 7091670 | Safety interlock apparatus and method A safety interlock apparatus for an electrical device includes a DC power supply, a ballast power supply including a ballast control circuit that controls a ballast power circuit, and a lamp. A relatively low voltage electrical connection is present between the DC p... | 08/15/2006 |
| 7091947 | Apparatus and method for prolonging lamp lifetime An apparatus for prolonging lamp lifetime by reducing luminance of a least one lamp (5) in phases includes an image signal outputting unit (1), a scaler (2), and a Microprogrammed Control Unit (MCU) (4). The MCU further includes a CPU ( | 08/15/2006 |
| 7091675 | Driving apparatus for cold cathode fluorescent lamps A driving apparatus (2) for cold cathode fluorescent lamps (CCFLs) includes a primary and a secondary driving circuits (22, 21), a primary and a secondary light tubes (24, 23), a primary and a secondary feedback circuits (26, 27), and two... | 08/15/2006 |
| 7088346 | Detecting a ‘no touch’ state of a touch screen display An enhanced touch-screen display system is disclosed for generating pixel coordinate estimates corresponding to a location on a display screen touched by a user. The system is an analog resistive touch-screen display system having a processor and associated software... | 08/08/2006 |
| 7081720 | Driver circuit and method for driving electroluminescent lamp to emit light at brightness set level A method for driving an electroluminescent lamp to emit light at a brightness set level includes providing a variable bias voltage to the electroluminescent lamp. The variable bias voltage is increased with the duration of the on-time of the electroluminescent lamp.... | 07/25/2006 |
| 7071984 | Imaging device for digital camera having photodiodes disposed over light shielding membrane for sensing brightness An imaging device includes photoelectric converting portions for converting light from a subject into signal charge pixel by pixel and transfer portions for transferring the signal charge generated by photometric conversion. Photometric photodiodes are disposed over... | 07/04/2006 |
| 7049768 | High intensity discharge lamps with electronic control of dimming A lighting system includes a high intensity discharge metal halide lamp having an arc discharge chamber with electrodes at each end and containing a fill of mercury, rare gas and metal halides, and a ballast circuit configured to supply pulsed electrical power to th... | 05/23/2006 |
| 7038399 | Methods and apparatus for providing power to lighting devices Methods and apparatus for providing power to devices via an A.C. power source, and for facilitating the use of LED-based light sources on A.C. power circuits that provide signals other than standard line voltages. In one example, LED-based light sources may be coupl... | 05/02/2006 |
| 7030565 | Lamp control circuit with selectable color signals The present invention describes a control circuit to be used in a lamp adapter that gives the user the ability to flash the main bulb on and off and, at the same time, flash a colored LED to indicate the purpose of the main bulb flashing. A first brief power interru... | 04/18/2006 |
| 7023353 | Warning device status circuit including a status output device A warning device including a status and function indicator circuit for indicating the status and function of the warning device. In a visual warning device such as a strobe light, the status and function indicator circuit includes a status output device such as an L... | 04/04/2006 |
| 7015447 | Illuminance calibrating method of illuminator, illuminance calibration controller of illuminator, illuminance calibrating program of illuminator, recording medium storing the program and measuring tool An illuminance calibrating method includes a light-receiving intensity measuring step (ST100) for measuring a relationship between an applied current value and a light-receiving intensity of a CCD camera of which exposure time is capable of being changed by t... | 03/21/2006 |
| 6952082 | Microwave excited ultraviolet lamp system with single electrical interconnection A microwave excited ultraviolet lamp system having a single electrical cable that supplies operating voltages from a power supply to a lamp head. The single electrical cable may provide high voltage to a magnetron of the lamp head and a lesser voltage to an internal... | 10/04/2005 |
| 6943333 | Light arrangement for vision system including a light controller with an external device A lighting arrangement for use in vision systems and imaging applications. The arrangement illuminates the object to be imaged with a supplied light of a specified illumination. The intensity, hue, and directionality of the supplied light can be varied. The desired ... | 09/13/2005 |
| 6909499 | Light source for illumination in an optical viewing device The invention concerns a light source having an apparatus for measuring the brightness of the illumination system of an optical viewing device, for example a microscope, in which at least one light sensor (3a) for measuring the intensity of the lamp ( | 06/21/2005 |
| 6903376 | Selective placement of quantum wells in flipchip light emitting diodes for improved light extraction In accordance with embodiments of the invention, a light emitting device includes a light emitting region and a reflective contact separated from the light emitting region by one or more layers. In a first embodiment, the separation between the light emitting region... | 06/07/2005 |
| 6841771 | Optical coupling device and light-receiving circuit of same A light-receiving circuit of an optical coupling device may include a dummy photodiode arranged in a vicinity of a photodiode. The dummy photodiode and photodiode may convert received optical signals to photoelectric current. Amplified photoelectric current outputs ... | 01/11/2005 |
| 6686706 | Device having three transistors for driving light-emitting element A device for driving a light-emitting element via three transistors includes a driving circuit, a negative voltage circuit, and a protection circuit. The driving circuit has a first transistor and a second transistor for producing a first signal. The nega... | 02/03/2004 |
| 6624585 | Ultra-compact igniter circuit for arc discharge lamp An igniter circuit for an arc discharge lamp comprises a DC to AC converter, a transformer, an AC to DC converter and high-voltage DC energy storage which is capable of discharging electrical energy to ignite the arc discharge lamp. In an embodiment, the ... | 09/23/2003 |
| 6617795 | Multichip LED package with in-package quantitative and spectral sensing capability and digital signal output A multichip light-emitting-diode package having a support member, at least two light-emitting-diode chips disposed on the support member, at least one sensor disposed on the support member for reporting quantitative and spectral information to a controlle... | 09/09/2003 |
| 6535829 | System for calculating exposure energy The present invention provides a system, comprising an exposure apparatus and a control mean electrically connected to the exposure apparatus, for calculating exposure energy (Ee). The control mean executes an exposure energy calculation progra... | 03/18/2003 |
