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7545101 |
Multi-zone closed loop daylight harvesting having at least one light sensor
A multi-zone daylight harvesting method and apparatus having a closed loop system utilizing a single light sensor is disclosed herein. This light control system includes an ambient light sensor...
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7432659 |
Back light unit and liquid crystal display device using the same
A back light unit and an LCD device using the same in which current which flows in a plurality of light emitting diodes (LEDs) is uniformly controlled having a small PCB is provided. The back light...
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7429828 |
Method and system for luminance characterization
A system for luminance characterization of a luminaire includes a ballast coil and a multi-tap capacitor connected in series with the ballast coil. The multi-tap capacitor has a plurality of tap...
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7417201 |
Switching arrangement for actuating lighting systems on a motor vehicle
Future motor vehicles will require additional lighting means. Additional lighting means are required, above all, in conjunction with environmental sensors, especially sensors which are used in...
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7397202 |
Brightness control circuit and backlight control module
A brightness control circuit is used to control brightness of a light emitting module. A light sensor module generates a first current through itself according to a light intensity. A charging...
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7355349 |
Apparatus and methods for providing emergency safety lighting
The present invention transforms existing electrical wall outlets into an emergency lighting system for homes, hospitals, hotels, nursing homes and businesses. The lighting device, designed as a...
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7211960 |
Burglar-proof wireless light adjusting module
A burglar-proof wireless light adjusting module is provided wherein a transmission socket of a control module is connected with a lamp and a local power, respectively, whereas a control socket at...
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6927541 |
Multimode motion-activated lighting
A motion detector circuit arrangement having multiple modes of operation for energizing a light at a nominal full-brightness illumination level in response to motion. Background level circuitry...
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6841947 |
Systems and methods for controlling brightness of an avionics display
The present invention provides for systems and methods for dimming a LED matrix functioning as a backlight to an avionics display. A system according to an embodiment of the present invention...
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6740892 |
Air-cooled lamp, and article treatment system and method utilizing an air-cooled lamp
An article treatment system and method utilizing an air-cooled lamp and having reduced cooling requirement. A power supply responds to a sensor sensing the presence of an article at an article...
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6693382 |
Control system for microwave powered ultraviolet light sources
In microwave energized ultraviolet bulbs, much of the input energy is converted to heat emissions. It has been found that the efficiency of such a bulb can be optimized by monitoring power density...
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6690121 |
High precision luminance control for PWM-driven lamp
A lamp brightness control for a lamp provides backlight illumination for a display. A brightness-to-current translator generates an electrical current command having a magnitude proportional to a...
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6521879 |
Method and system for controlling an LED backlight in flat panel displays wherein illumination monitoring is done outside the viewing area
A system and method for controlling light emitted by a group of independent strings of LEDs in an LED backlight for a flat panel LCD display, in which optical feedback is used to increase a light...
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6466826 |
Apparatus and method for providing bypass functions for a motion sensor switch
An apparatus and method for controlling a motion sensor switch which is adapted to control a lighting circuit in an area monitored by the motion sensor switch. The apparatus and method employs a...
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6465963 |
Headlight control system utilizing information from a microwave receiver
An inventive rearview mirror assembly is disclosed in which a microwave antenna is mounted so as to receive transmissions from one or more satellites through the front windshield of the vehicle....
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6388388 |
Brightness control system and method for a backlight display device using backlight efficiency
The invention provides a brightness control system for a backlight display device that uses the efficiency of the backlight to control the backlight to a desired brightness or luminance. The...
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6300721 |
Photocontrol arrangement with mechanically held contacts for controlling an outdoor lighting system
A photocontrol arrangement for operating an outdoor lighting system includes a stepper relay whose contacts are mechanically held together or apart, and which is electrically energized briefly only...
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6288492 |
Head lamp switch with twilight sentinel control
A system for controlling the turning on of vehicle headlamps 703 of a vehicle having a dome light 50 which provides a variable dome light intensity includes a sensor 40, a memory 820, a comparator...
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6225748 |
Motion-detector circuitry with adjustable background lighting level
A circuit arrangement according to the invention is intended to be used in a PIR motion-activated lighting fixture of the type that includes a triac for energizing the light from the AC power mains...
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6191531 |
Device for influencing a lighting installation as a function of ambient light
The invention relates to a device for influencing a lighting installation, and more particularly, includes a lighting installation of a motor vehicle, depending on ambient light. The device...
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6166491 |
Lighting device and display equipment
A lighting device controls power to a discharge lamp according to the temperature detected by a lamp sensor, which detects temperature around the discharge lamp. The discharge lamp has an arc tube...
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6160351 |
Illumination control apparatus for controlling illumination by detecting external magnetic field
An illumination control apparatus for controlling illumination by detecting a change in an environment is provided. The illumination control apparatus includes a magnetic field detector for...
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6069448 |
LCD backlight converter having a temperature compensating means for regulating brightness
A LCD backlight converter includes a temperature detection circuit arranged between a cold cathode fluorescent lamp and a backlight feedback control circuit. The temperature detection circuit has a...
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5990628 |
Light level sensor for detecting the level of incident light and discriminating between natural and artificial light
A light level sensor for use in controlling the switching of artificial lighting. The sensor comprises a photoelectric transducer which provides an output signal at a level which is significant of...
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5828179 |
Device for preventing a lamp from igniting a cover such as a curtain
An anti-burn device which can prevent a floor lamp from burning material covering thereon is disclosed. The anti-burn device includes a photoresistor and a detecting control circuit. The...
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5742131 |
Dimmable ballast control circuit
A control circuit for controlling the light output level of a dimmable fluorescent light ballast such as the Mark VII ballast manufactured by Advance Transformer, Inc. The circuit operates from...
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5585697 |
PAR lamp having an integral photoelectric circuit arrangement
A reflector lamp assembly having an integral photo-sensor and sensing circuit arrangement associated therewith provides for sensing the ambient light conditions at a point adjacent the top surface...
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5554912 |
Adaptive instrument display brightness control system
An adaptive instrument display brightness control system that automatically controls the instrument display brightness of a vehicle based on a vehicle operator's changes to the display brightness...
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5455488 |
Miniature light-activated lamp control apparatus and the like
Miniature light-activated lamp control apparatus and the like, including a thin disk-shaped switching unit positionable within a light bulb socket and a thin light conductor having one end attached...
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5384616 |
Photographic lighting system using incident light meter
A photographic lighting system for use with a camera provides fill light from the direction of the camera to alleviate shadows in a photographic image obtained by the camera. The photographic...
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5280220 |
Remote controlled, solar and battery powered lights
An electrical device such as a lamp is energized and deenergized remotely by a system in which pulses of different duration are transmitted to a receiver unit capable of discriminating between the...
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5204586 |
Solar powered lamp having a circuit for providing positive turn-on at low light levels
A solar powered lamp having a circuit for providing positive turn-on at low light levels causes a light source thereof to undergo a discrete transition to an "on" condition and prevents unnecessary...
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5019747 |
Illumination control apparatus
An illumination control apparatus includes a control slave unit, a master unit, a supervisory slave unit, and a photosensor slave unit. The supervisory slave unit has an operation switch, and...
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4672271 |
Apparatus and method for automatic operation of a high pressure mercury arc lamp
Apparatus and method for automatic control of with a high pressure mercury arc lamp is described. The apparatus includes a control unit that monitors the current and the voltage supplied to the arc...
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4665627 |
Dry film curing machine with ultraviolet lamp controls
A dry film curing machine utilizes ultraviolet lamps mounted in reflectors, which are positioned on opposite sides of a mesh or open type conveyor belt carrying the film to provide radiation for...
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4575659 |
Sensor timer for lamps
A sensor timer is provided for automatically turning on and off a lamp or alternatively for allowing the lamp to be manually turned on and off using the switch normally associated with the lamp....
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4568858 |
Lamp control circuit
A lamp control control circuit has triacs for controlling a current from an AC power supply and supplying a controlled current to lamps; a phase angle control unit for generating phase angle...
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4531078 |
Control circuit for electronic flash
A control circuit for timing the duration of a flash of artificial illumination from an electronic flash maintains a substantially uniform amount of artificial illumination regardless of the...
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4249160 |
Vehicle mounted light activated control system
A light activated control system, particularly for operating warning lights on a vehicle parked at night. The system includes a light sensor mounted on the vehicle and a comparator which triggers a...
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4139802 |
Light-responsive electric switch
The disclosure is of a light-responsive electric switch which is characterized in that it is constituted mainly by a photoresistive cell inserted in a voltage-divider bridge of which the voltage...
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4091276 |
Remote control switching
Electrical appliances, particularly A.C. operated appliances, are turned on and off from remote locations by shining a beam of light, using a flashlight or the like on a photoelectric...
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4008415 |
Photocontrol for electric lamps
An improved photocontrol system for electrical lamps comprising the combination of photoelectric means responsive to the intensity of the ambient light for controlling the turning the lamps on and...
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3930184 |
Electronic flash coupling system for sequential flashbulb firing circuit
An electronic flash system for an automatic camera adapted for use with sequential arrays of flashlamps and having a distributing network for sequentially firing the lamps, one for each exposure....
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3903451 |
Gating network for image intensifier
An electronic analog gating means for an image intensifier in which transted pulsed illumination that is returned from targets down range are gated through the image intensifier in an analog manner...
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3876905 |
Composite electrodes for crossed-field switch device and method
The crossed-field switch device has electrodes, and particularly an outer cathode electrode which in its main body has sufficient mechanical strength to serve as the device envelope and has an...
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3875471 |
Photoflash source control circuit
Circuits for controlling the amount of light received from a subject being photographed and terminating the operation of a flash lamp are disclosed. The circuits include a photosensitive element...
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3849703 |
ELECTRONIC FLASH APPARATUS
An electronic flash apparatus for automatically terminating the flash produced by the flash tube of the device after a condition where a predetermined total quantity of light has been received from...
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3790895 |
GLOW DISCHARGE MILLIMETER WAVE DETECTOR AND METHOD OF BIASING SAME
A millimeter wave glow discharge detector biased to achieve an improvement in signal to noise ratio of about 20 dB. The glow discharge detector tube comprises three or more electrodes, including an...
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3754162 |
PHOTOFLASH NETWORK
A variable duration photoflash network includes a gas discharge flash tube connected through an SCR to a charge capacitor and a transformer simultaneously applies a triggering signal to the SCR...
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3749967 |
ELECTRON BEAM DISCHARGE DEVICE
An electron beam discharge device for transmitting from the evacuated interior of the device a broad area electron beam through an electron window to a region of higher pressure outside the device....
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