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8169146 |
Metal halide lamp
A metal halide lamp capable of delaying the rate of deformation in an electrostrictive phenomenon caused by the discharge of a ferroelectric ceramic capacitor when dielectric breakdown is initiated...
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8115395 |
Self-dusting lamp device
A self-dusting lamp device includes a housing, a heat-dissipating module, a lighting element and a controlling unit. The housing has an air inlet portion and an air outlet portion on the outer...
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8111011 |
LED luminaire with improved life and operation management
A method and apparatus for adjusting the drive signal of an LED luminaire is provided and includes an LED light source assembly, an ambient sensor circuit, a comparator circuit, and a driver...
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8106592 |
Method of driving a discharge lamp, driving arrangement, and projector system
The invention describes a method of driving a discharge lamp (1), wherein a blackening value (N) is determined, which blackening value (N) represents a level of blackening of the interior of the...
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8022631 |
Color control of light sources employing phosphors
An illuminating device includes a light source including a lighting device, such as a solid state lighting device, which emits light, a phosphor material which converts at least a portion of the...
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7968828 |
Temperature controlling method of electron bombardment heating apparatus
A method of operating an electron bombardment heating apparatus, in which thermions emitted from filaments are accelerated and impinged upon a heating plate, so as to heat the heating plate,...
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7948186 |
Backlight control circuit having frequency setting circuit and method for controlling lighting of a lamp
An exemplary backlight control circuit includes an inverter, a pulse width modulation (PWM) circuit, and a frequency setting circuit. The inverter is configured to provide an alternating current...
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7922334 |
Multistage cooling system for projector
A projector having optical components, a power source unit, and a light source unit. The projector is capable of lowering its internal temperature utilizing: a first, second, and third fan (41, 42,...
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7893624 |
Backlight control circuit having frequency setting circuit and method for controlling lighting of a lamp
An exemplary backlight control circuit includes an inverter, a pulse width modulation (PWM) circuit, and a frequency setting circuit. The inverter is configured to provide an alternating current...
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7878660 |
Method for controlling a cooling device of a projecting system and the projecting system thereof
A method for controlling a cooling device within a projecting system is provided. The cooling device cools the projecting system with a predetermined period after the illumination device of the...
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7794105 |
Temperature controlled light fixture for environmental chamber
A light fixture includes a plurality of fluorescent bulbs wherein a light intensity of each of the plurality of fluorescent bulbs is related to the operating temperature of the fluorescent bulbs, a...
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7586730 |
Electron bombardment heating apparatus and temperature controlling apparatus
An electron bombardment heating apparatus, in which thermions emitted from filaments are accelerated and impinge upon a heating plate, so as to heat the heating plate, wherein a peripheral wall of...
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7578594 |
Illumination source activation based on temperature sensing
A method for determining whether to activate an illumination source includes directing an air current across at least a portion of the illumination source and across at least a portion of a...
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7438420 |
Display apparatus
A display apparatus having a control unit which controls the light source temperature so that the temperature remains within a predetermined temperature range, a light modulation device for...
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7298093 |
Method and device for driving CCFL circuit
A driving device for a CCFL circuit comprising at least one CCFL is provided. The driving device comprising at least one heating device controlling the temperature of the at least one CCFL, a power...
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7291982 |
Method and apparatus for the closed loop and open loop control of filament heating for lamps
An apparatus for the closed-loop and open-loop control of filament heating for a lamp, in particular for a fluorescent lamp, has a control loop into which a first filament (W1), an...
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7052143 |
Projection device having blower and/or lamp with feedback control
In one example, a method for controlling temperature in a projection device, comprises measuring a plurality of temperatures in the projection device; averaging said plurality of temperatures to...
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7038390 |
Lamp control system
A method and apparatus are provided for reducing the stable lamp standby power to the order of 5% of nominal full power in order to reduce the effects of heat from the lamp on a substrate during...
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7034467 |
Controller for suppressing temperature of screen
The present invention discloses a controller for suppressing the temperature of a screen in order to maintain the ambient temperature of the screen to the level of a predetermined standard...
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6960759 |
Light source device, image reading apparatus and image reading method
A light source device which can prevent a large-sized structure of the device, a light source device which can improve assembling efficiency and maintainability of the device, and an image forming...
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6847170 |
Smart light source with integrated operational parameters data storage capability
A light source having a light generator, a sensor for sensing operational parameters of the light generator, and a light source data storage device integrated with the light generator and...
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6753651 |
Emergency ballast with battery heater
An emergency ballast for a fluorescent lamp including a heater disposed adjacent the battery for maintaining the battery at a safe and effective operating temperature during the time which the lamp...
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6747413 |
Display cold spot temperature regulator
An apparatus and method is disclosed for regulating the cold spot temperature of a light emitting enclosure. A cold spot regulation system defines and controls the temperature of the cold spot. The...
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6635991 |
Method of adjusting the light spectrum of a gas discharge lamp, gas discharge lamp, and luminaire for said lamp
The invention relates to a method of adjusting a desired spectrum of light emitted by a gas discharge lamp during its operation, said gas discharge lamp comprising a first ionizable substance and a...
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6498442 |
Self-heating type cold-cathode discharge tube control apparatus
In a control apparatus for a self-heating type cold-cathode discharge tube, a microcomputer determines boosting time based on a detected surrounding temperature of the cold-cathode discharge tube....
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6483247 |
Lighting apparatus and light control method
A lighting apparatus and method. The apparatus includes a light source, counting means for counting an actual amount of time that the light source has been used, and recording means in...
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6476560 |
Liquid crystal projector
A liquid crystal projector comprises a reset switch for resetting the operation of a microcomputer, and abnormality recovery means for initializing, when the liquid crystal projector is in a power...
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6472823 |
LED tubular lighting device and control device
An LED tubular lighting device and control device includes LEDs planted in a transparent tube and controllable via a controller to obtain multifarious light sources. The tubular lighting device...
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6352356 |
Illuminating device for a display
An electric heating element (4) designed for heating a fluorescent lamp (2) of an illuminating device for a display is arranged on a printed circuit board (5) at only a small spacing from the...
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6268701 |
Fluorescent light ballast convective cooling means
A flourescent light is provided with an integral fan for cooling purposes. The air is filtered by a small replaceable filter that keeps dust and dirt out of the fixture. The fan is wired in...
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6181070 |
Method for cooling a lamp backlighting module of a liquid crystal display
The present invention is a method for cooling a lamp backlighting module of a liquid crystal display. A preferred method of the present invention begins by providing a predetermined power input to...
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6127784 |
LED driving circuitry with variable load to control output light intensity of an LED
Circuitry for driving an LED array and a lamp including such circuitry. A fixed current source outputs a fixed current to an LED array. A variable load is provided in parallel to the LED array to...
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6066920 |
Illumination device, method for driving the illumination device and display including the illumination device
An illumination device includes a cold cathode fluorescent tube having a heat capacity of 0.035 Wsec/° C. or less per unit length (1 cm) of a glass tube of a fluorescent section of the cold ...
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5990627 |
Hot relight system for electrodeless high intensity discharge lamps
An electrodeless high intensity discharge lamp includes an electrodeless lamp capsule having an enclosed volume containing a mixture of starting gas and chemical dopant material excitable by high...
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5834908 |
Instant-on vapor lamp and operation thereof
Operation of a vapor lamp light source for instrumentation utilizes a lamp manager controller for instant-on and precise temperature control to enhance and control output at specified wavelengths...
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5808418 |
Control mechanism for regulating the temperature and output of a fluorescent lamp
Disclosed is a control mechanism for regulating the temperature of a fluorescent lamp tube located within a housing. The control mechanism includes a cold spot mechanism defining the cold spot of...
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5773926 |
Electrodeless fluorescent lamp with cold spot control
This invention relates to electrodeless fluorescent RF lamp which includes bulbous lamp envelope (10, 20) with a top, a bottom and a fill of rare gas and vaporizable amalgam (14) therein. A...
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5612593 |
Fluorescent tube thermal management system utilizing thermal electric cooler units
A system for actively monitoring and controlling the effective ambient temperature in an application utilizing a fluorescent tube as the source of illumination. The system is the combination of a...
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5508782 |
Lighting unit cooling device control and combined exhaust device
An image formation apparatus comprises an image formation device for forming an image on a recording material according to image information light obtained from light emitted from a light source. A...
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5309061 |
Compact fluorescent lamp having incandescent lamp starting aid
A lamp assembly includes a tubular incandescent lamp located between the four tube sections of a double twin tube compact fluorescent lamp such that heat is transferred from the incandescent lamp...
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5274305 |
Low pressure mercury discharge lamp with thermostatic control of mercury vapor pressure
The mercury vapor pressure in a low pressure mercury discharge lamp is thermostatically controlled. A low pressure mercury discharge lamp includes electrodes and a source of mercury vapor sealed in...
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5229842 |
Method and apparatus for controlling fluorescent lamp mercury vapor pressure
A fluorescent lamp light output is maximized by cooling the cathode regions. Mercury vapor pressure is maintained at an optimum or desired level for light production by cooling the cathode areas of...
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5189340 |
Fluorescent lamp assebmly for image scanner
In a fluorescent lamp assembly for use in an image scanner, a heater is associated with a glass tube of a fluorescent lamp for heating the glass tube. A controller is provided for controlling the...
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5150154 |
Apparatus for forming images discharge lamp and current, tone and temperature control means
The invention provides apparatus for forming images at a high speed and with small power consumption, in which a discharge lamp for exposure remains `on` and electric power supplied to the lamp is...
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5101142 |
Solid-state ballast for fluorescent lamp with multiple dimming
Dimming fluorescent lamp solid-state ballast. The ballast is adapted for automatic sensing and control of lamp temperature to dim the lamp to an optimal operating temperature, such as that at which...
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5095247 |
Plasma discharge apparatus with temperature sensing
A plasma discharge apparatus has a first electrode, a counter electrode, and a power source for supplying power to the first and counter electrodes for initiating and sustaining plasma discharge...
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4990831 |
Spark gap switch system with condensable dielectric gas
A spark gap switch system is disclosed which is capable of operating at a high pulse rate comprising an insulated switch housing having a purging gas entrance port and a gas exit port, a pair of...
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4980609 |
Spark gap purge system
A spark channel purge system for high pulse repetition frequency spark gap switches. A purge fluid having a liquid state and a gaseous state is caused to flow through a spark gap channel, at least...
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4978890 |
Fluorescent lamp device
A fluorescent lamp device which is used for backlighting of a liquid crystal display and in which a Peltier element is thermally coupled with a portion of a fluorescent lamp and a temperature...
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4978891 |
Electrodeless lamp system with controllable spectral output
An electrodeless lamp system and method for providing light output having a controlled spectral distribution. A lamp having a fill which is not fully vaporized at the lamp operating temperature and...
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