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| Number | Title | Issue Date |
| 8063567 | Light output control method and lighting system using the same A light output control method for a lighting system is provided. The lighting system includes a plurality of sensors and a light-emitting unit. The light output control method includes steps of: sensing a motion of an object within the sensing ranges of the sensors ... | 11/22/2011 |
| 7952291 | Discharge lamp having a visual-change timer A discharge lamp having a visual-change timer is described. The visual-change timer is comprised of a ceramic material that provides an indication of the cumulative operating time of the lamp. The visual-change timer is expected be a help to consumers in avoiding un... | 05/31/2011 |
| 7382454 | System and method for optically assessing lamp condition A greater efficiency and cost-effectiveness is achieved by optically assessing the condition of a gas discharge lamp. Herein, a system and method of optically assessing lamp condition includes measuring the intensity of emitted light within two portions of the emitt... | 06/03/2008 |
| 7377658 | System and method for automated projector lamp management An information handling system projector tracks lamp usage to generate a lamp order form for order of a replacement lamp when lamp usage is a predetermined usage. The lamp order form is automatically generated and displayed to include lamp usage and projector identi... | 05/27/2008 |
| 7268497 | Lighting device with night light and human body sensing capability A lighting device with night light and human body sensing capability includes a first illumination device, a second illumination device, a sensor and a main body. The first illumination device is designed to illuminate a local predetermined area, and the second illu... | 09/11/2007 |
| 7170643 | Image reading apparatus, composite apparatus using the image reading apparatus, and control apparatus and method for the image reading apparatus In an image reading apparatus having a light source for illuminating a document, an image sensing element for outputting an electrical signal in accordance with an input light quantity, a first reference member, and a second reference member, shading correction data... | 01/30/2007 |
| 7122976 | Light management system device and method A lighting control system is disclosed. The lighting control system is electrically coupled to a load circuit for controlling indoor and/or outdoor lighting. The lighting control system includes a control module with a night light for providing low-level night light... | 10/17/2006 |
| 7119492 | Flicker detecting system for detecting lamp life differing from lamp to lamp A flicker detection system according to the present invention has an AC component extracting circuit that extracts an AC signal from a voltage applied to a lamp, the AC signal being an AC component of the voltage applied to the lamp, a display section adapted for di... | 10/10/2006 |
| 7081713 | Light grid for detecting objects in a monitoring region A light grid is provided for the detection of objects in a monitoring region having a transmitter unit comprising a plurality of light transmitters and a receiver unit comprising a plurality of light receivers in which respective pairs of light transmitters and ligh... | 07/25/2006 |
| 7030574 | Luminary control system A light source and method for controlling the same. The light source utilizes a light generator that generates a light signal of a wavelength at an intensity that is set by a control signal. The control signal is controlled by a servo that monitors the light output ... | 04/18/2006 |
| 6963170 | Lamp monitor and lamp The present invention discloses a lamp comprising a lamp housing mounting an electrically driven light and a monitor circuit, the housing having power supply terminals for connection of the light to a power supply and the monitor being connected to the light such as... | 11/08/2005 |
| 6909239 | Dual LED/incandescent security fixture A dual LED and incandescent security lighting system uses a hybrid approach to LED illumination. It combines an ambient LED illuminator with a standard incandescent lamp on a motion control sensor. The LED illuminator will activate with the onset of darkness (daylig... | 06/21/2005 |
| 6894434 | Nightlight and lamp control A nightlight and control unit comprises a nightlight housing including an illumination member and a control unit associated with the nightlight housing for regulating light in a light device connectable to the control unit. An input mechanism is provided for program... | 05/17/2005 |
| 6717660 | System for monitoring and testing of light sources A light monitoring system provides a sensing unit coupled to a luminaire. The sensing unit monitors both the input and the output of the luminaire for both current and voltage. In this manner, a variety of problems with the luminaire can be detected by the sensor an... | 04/06/2004 |
| 6531832 | Discharge lamp and electronic flash device using the same In a discharge lamp, at least one of two main electrodes disposed at both ends of the discharge lamp includes one main electrode that comprises a sintered metal member having a slope with respect to another main electrode. A tip of the slope is positioned... | 03/11/2003 |
| 6246433 | Film image capturing method A film image capturing method of reading a continuous developed film with a line sensor. This method comprises the steps of: pre-scanning for determining exposed conditions, including brightness, of each of the plurality of frames on the film; index scann... | 06/12/2001 |
| 6024831 | Method and apparatus for monitoring plasma chamber condition by observing plasma stability A method and apparatus for monitoring condition of the plasma of a plasma process during processing is disclosed. A spectrum detector (12) detects the intensity of a predetermined wavelength of radiation produced by the plasma process. The output of the s... | 02/15/2000 |
| 5929781 | Radio frequency controlled system for testing emergency lighting units An system is provided for testing emergency lighting units using a receiver connected to the emergency lighting unit and a portable transmitter operable remotely with respect to the emergency lighting unit. The emergency lighting comprises a transfer rela... | 07/27/1999 |
| 5449976 | Control unit for controlling a strobe light or the like A control unit for controlling a strobe light or the like, in particular for use in an alarm system or an emergency locator, is characterized in that a direct current power supply unit is provided which is activated to drive the strobe light when an exter... | 09/12/1995 |
| 5440207 | Reference light source device using laser A reference light source device includes a first laser diode emitting a reference light, a harmonic generating unit for generating an nth harmonic of the reference light, where n is an integer, a light generating unit for generating a light signal having ... | 08/08/1995 |
| 5416385 | Means for compact spatial optical integration An apparatus and method of controlling the light intensity in a light source of variable emission affected by a drive signal. Spatial optical integration based upon light summation is incorporated into the accompanying encasement device at a backlight sou... | 05/16/1995 |
| 5336976 | Illumination warm-up control in a document scanner A method for determining when overall lamp intensity is stable for a lamp in a document scanner. The intensity of a relatively small portion of the lamp is controlled as part of a closed loop intensity control system. During a warm-up transient period, th... | 08/09/1994 |
| 5105124 | Lamp failure detecting device A detecting device can centrally monitor and detect a lamp failure of one or more lamps connected in series such as guide lamps in the runway of an airfield. A core (12) is disposed on a power line (P1) of each lamp (L1 -Ln | 04/14/1992 |
| 5083063 | Radiation generator control apparatus Apparatus for controlling operation of a number of radiation generator assemblies comprises a store for storing calibration values for respective assemblies, respective switches, a digital to analogue converter (D/A) and control means. The switches are co... | 01/21/1992 |
| 4952972 | Life expiration detector for light source of image processing apparatus An image forming apparatus includes a detector for detecting light intensities of light from a light source, and a discrimination unit for obtaining the relative ratio of chroma signals of light with two or more wavelengths at the light intensities of the... | 08/28/1990 |
| 4839562 | Electrical devices The invention relates to the idea of a device which can be interposed between a lamp and its socket for a variety of purposes including control of the operation of the lamp, hazard and security status detection. In one form the device is responsive to the... | 06/13/1989 |
| 4778967 | Illuminated switch The present invention relates to an illuminated switch and in particular to one having a housing, switch contacts in the housing, an electrical device disposed in the housing and operatively associated with the switch contacts, a light transmissive colore... | 10/18/1988 |
| 4728861 | Light control apparatus for a vehicle A light control apparatus for a vehicle is integrated with headlamp driving relays, a light sensor, a lighting switch which selects a manual mode or an automatic mode, and a control unit which controls the relays in accordance with the light sensor output... | 03/01/1988 |
| 4695769 | Logarithmic-to-linear photocontrol apparatus for a lighting system A photosensor for detecting the light intensity of an external light source, usually the sun, which is illuminating an area is used as the sensor for a control network of an artificial lighting system for that same area to compensate for light intensity v... | 09/22/1987 |
| 4572987 | Lamp monitoring circuit In order to provide a lamp failure warning in both illuminated and unilluminated states of the lamp, there is provided a resistance bridge circuit Rs, L, R2 and R3 which is substantially in balance if the lamp L is sound. An amplifier IC1 acts as a detect... | 02/25/1986 |
| 4558307 | Reminder device A box formed with an aperture in which a photosensitive cell is secured includes an electronic circuit connected to be fed by the electrical signal produced by the photosensitive cell when the latter is irradiated by ambient radiation. Said electronic cir... | 12/10/1985 |
| 4550273 | Eight electrode optical readout gap A protective device for a plurality of electrical circuits includes a pluity of isolated electrodes forming a gap with a common electrode. An output signal, electrically isolated from the circuits being monitored, is obtained by a photosensor viewing the... | 10/29/1985 |
| 4494852 | Photoflash detector A self-contained photodetector for detecting the light flash from a photoflash unit which is supposed to flash when the shutter of a camera opens. The detector has a light-activated SCR for turning on an IC chip timer, which produces an output signal that... | 01/22/1985 |
| 4484105 | Circuit for selectively exciting one of a pair of light emitting diodes A circuit for selectively lighting one of a pair of light-emitting diodes (LEDs) arranged in a parallel, back-to-back, circuit configuration also known as an anti-parallel circuit configuration. One side of the configuration is connected with ground conne... | 11/20/1984 |
| 4464605 | Three terminal solid state pilot light In a pilot light usable for monitoring industrial control circuits a set of three terminals comprising a signal terminal, a test terminal and a line, or return terminal, with a signal circuit network between the signal and line terminals that supplies cur... | 08/07/1984 |
| 4449076 | Light isolated pilot light A pilot light as might be used for monitoring an industrial control circuit having a normal signal circuit connectable to a control circuit element for illuminating a lamp of the pilot light when such control circuit element is operated, and also having a... | 05/15/1984 |
| 4395658 | Proper light emission indicating device for computer flash device In the disclosed device, a sensor produces a corroborating signal when a computer flash unit emits a flash proper for an exposure. A timer energizes an indicator for a predetermined time in response to the corroborating signal. When the sensor produces a ... | 07/26/1983 |
| 4379983 | Electric flash device A flash device of the invention comprises, substantially, a flash unit for generating flash light and a flash control unit for controlling the flash light generated from said flash unit. The flash unit comprises electric power supplying means for supplyin... | 04/12/1983 |
| 4376910 | Power supply and control device for the proper operation of a railway traffic light A periodic current generator is connected with a long power supply line through a first transformer. The lamp of the traffic light is connected to the long line through a second transformer. First and second safety capacitors with four terminals each are ... | 03/15/1983 |
| 4338595 | Microwave leakage detector A portable microwave leakage detector comprises a dipole antenna and a hot carrier diode connected in parallel with a light emitting diode, the circuit incorporating minimum solder joints and affording maximum sensitivity without moving parts such that th... | 07/06/1982 |
