Abstract: A lighting device for providing mixtures of color temperature and intensity of light. The device comprises a case that contains: a multi-chip of light emitting diode (LED) to output mixtures of color temperature and intensity of light, having a plurality of blocks of LEDs each having a predetermined color temperature, the multi-chip LED being mounted on a printed circuit board (PCB); a cooling system attached on the back of the metal PCB, the cooling system using a fluid coolant for radiating heat generated by the multi-chip LED; and a control system electrically connected with the PCB of each block and the cooling system, the control system is adapted to supply power to the multi-chip LED, select the blocks of LEDs to be adjusted, adjust the color temperature and intensity of light of the selected block of LEDs to obtain mixtures of color temperatures and intensity of light.

Abstract: 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 projecting system is turned off. Then, after the projecting system is restarted, it is detected that whether the illumination device is lighted or not. As the illuminating device is not lighted, the predetermined period is extended.

Abstract: Various system embodiments comprise a substrate of high thermal conductivity, a solid state light emitting device, an electric circuit, and an electric dielectric. The device has a die and a connection point to the die with a low thermal resistance. The connection point is in contact with the substrate. The electric circuit is electrically connected to the light emitting device, and separated from the substrate by the electrical dielectric. Various system embodiments comprise at least four color sources; and a controller configured to calculate a solution to form a target color using the color sources when the target is outside of a gamut formed by the color sources. The controller is configured to find an equivalent target color with reduced saturation.

Abstract: Device for centerpoint wavelength adjustment of emitted radiation of an LED unit having at least one interference filter arranged downstream in the optical axis of the LED unit. The LED unit and the interference filter are connected to at least one temperature regulating unit, and the temperature regulating unit is connected to at least one temperature acquisition unit. The temperature acquisition unit acquires the temperature of the LED unit as well as a temperature of the interference filter.

Abstract: A lamp includes a lighting module having a lighting element and a control circuit electrically connected to the lighting element. The lamp further includes a control unit having a temperature sensor and a processor electrically connected to the temperature sensor and the control circuit. The temperature sensor senses a temperature of the lighting element and generates a temperature sensing result. The processor controls brightness of the lighting element based on the temperature sensing result of the temperature sensor. Since the brightness of the lighting element can be controlled by the processor through the control circuit using the temperature sensing result, overheating of the lighting element during operation can be avoided. The service life of the lighting element is, thus, prolonged.

Abstract: An illumination device and a control method of the illumination device are provided. The illumination device includes a thermal sensor and a light emitting diode (LED) module. The control method include steps of: enabling the thermal sensor to detect the environment temperature outside the illumination device, and comparing the environment temperature with a threshold value, wherein if the environment temperature is higher than the threshold value, the driven current of the LED module is reduced and the thermal sensor is shut down within a continued period of time.

Abstract: Systems, methods, and devices are provided for maintaining a target white point on a light emitting diode based backlight. In one embodiment, the backlight may include two or more strings of light emitting diodes, each driven at a respective driving strength. Each string may include light emitting diodes from a different color bin, and the respective driving strengths may be adjusted, for example, through pulse width modulation or amplitude modulation, to maintain the target white point. In certain embodiments, the driving strengths may be adjusted to compensate for shifts in the white point that may occur due to temperature or aging. A controller may adjust the driving strengths based on feedback from a temperature sensor, from an optical sensor, from a user input, or from calibration data included within the backlight or system.

Abstract: 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 periphery thereof. The heat-dissipating module has a heat-dissipating fan mounted in the housing. The lighting element is coupled to the heat-dissipating module for illumination. The controlling unit has a driving circuit electrically connected to the heat-dissipating fan and a direction controlling circuit electrically connected to the driving circuit. The direction controlling circuit controls the heat-dissipating fan to rotate in a normal direction for dissipating heat or to rotate in a dusting direction for dusting down the housing through the driving circuit.

Abstract: 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 sensor for sensing a physical parameter related to the light intensity, and a circuit adapted for monitoring the sensor and controlling the operating temperature of the fluorescent bulbs to maintain the operating temperature of the fluorescent bulbs within a range having a lower temperature and an upper temperature. A method of maintaining light intensity of fluorescent bulbs in an environmental chamber includes monitoring a physical parameter associated with the light intensity of the fluorescent bulbs in an environmental chamber and adjusting temperature of the fluorescent bulbs in the environmental chamber to maintain an optimum light intensity of the fluorescent bulbs in the environmental chamber.

Abstract: An optical measuring apparatus including: a measuring apparatus body, a lighting unit, a lighting controller. The lighting unit is demountably mounted on the measuring apparatus and has an LED as a light source. The lighting controller is configured to control the lighting unit according to a light intensity command value. The lighting unit includes a storage unit in which a calibration value is stored. The calibration value generates a light intensity corresponding to the light intensity command value. The lighting controller is configured to read calibration values corresponding to the light intensity command value out from the storage unit of the lighting unit upon receipt of the light intensity command value, and controls the LED on the basis of the calibration value.

Abstract: An illumination system includes an LED lamp, a timer, a controlling circuit, a driving circuit and a power source electrically connected together. The timer produces different signals to the controlling circuit at different periods, thereby driving the LED lamp to lighten with different brightness. A light or movement sensor is further electrically connected to the LED lamp to work together with the timer. The sensor cooperating with the timer, detects light or movement of an object to drive the LED lamp to lighten for a while with a corresponding brightness.

Abstract: 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 lamp (1), and a recovery parameter (2, T) is calculate based on the blackening value (N). When the lamp power is increased above the saturation power level, the lamp (1) is driven according to the recovery parameter (2, T) for the duration of a specific recovery time. The invention further describes a driving arrangement (70, 70), and a projector system (10) comprising a high-pressure discharge lamp (1) and such a driving arrangement (70, 70).

Abstract: A lighting array assembly has a plurality of support members facing different directions and on which emitters are mounted. Each support member has an emitter circuit thereon in operative association with at least one emitter and has a lighting center point. The emitters on each support member are positioned together around the lighting center point. The number of emitters mounted on each of the outer surfaces is determined by the light specified in each direction to meet the desired lighting distribution configuration in each direction. A method of configuring an emitter lighting array assembly includes selecting the desired lighting distribution configuration to achieve a desired lighting distribution.

Abstract: A controller measures a temperature at which an ultraviolet (UV) fluorescent lamp is operating and, in response, controls heat transfer between a heat-generating portion of the fluorescent lamp power supply circuitry, such as the ballast, and the interior of the curing chamber to maintain the fluorescent lamps operating at a stable temperature.

Abstract: 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 a heated material supporting member having a heating plate as a ceiling thereof is made of multi-staged peripheral wall portions, positioned vertically and having a different radius, and those peripheral wall portions are connected with each other by means of a ring-like horizontal wall. With this, thermal stress can be mitigated, which is caused due to a difference in temperature between the lower end portion of the heated material supporting member and the heating plate when heating up the heating plate, thereby causing no breakage in the heated material supporting member when conducting heating and cooling upon the heating plate, repetitively.

Abstract: 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 temperature sensor. The method also includes sensing the temperature of the air current with the temperature sensor and determining whether to activate the illumination source based on the temperature of the air current.

Abstract: A lighting emitting diode (LED) lamp (100) includes a first LED array (60) and a second LED array (50). A ratio of change of relatively luminous intensity relative to change of temperature of the first LED array is less than that of the second LED array. A first heat sink (10) thermally attaches to the first LED array. A second heat sink (20) thermally attaches to the second LED array. An active heat dissipating device (80) is in combination with the second heat sink for enhancing a heat dissipation efficiency of the second heat sink, and thus the heat dissipation efficiency of the second heat sink is greater than that of the first heat sink. The heat dissipation of the second LED array is much quicker than that of the first LED array. The second LED array thus can be kept working at a much less temperature.

Abstract: Disclosed is a cooling apparatus of a discharge lamp for applying a heat spreading plate to a high intensity discharge lamp or for applying both a heat spreading plate and a cooling fan to a high intensity discharge lamp so as to improve a durability of an embedded electronic ballast and to increase an optical output efficiency of a discharge lamp.

Abstract: A control system for a liquid motion lamp maintains the proper temperature of liquids within the lamp to provide desired motion within the lamp, and reduces sensitivity to ambient temperature. The lamp preferably includes two heating elements, a first element for initial heating, such as a heat blanket, resistive glass coating, or a submerged ring, and a second heating element generally providing both heat and lighting. A sensor measures the temperature of the liquid inside the lamp and the control system controls the heat sources to maintain the temperature within operating limits.

Abstract: A super cooler device including a thermo electric cooler on a digital micro mirror device.

Abstract: A method and apparatus for providing electrical current to a lamp, detecting a power supply voltage outage, detecting a return of the power supply voltage, determining how long the power supply voltage outage lasted, and preheating the lamp responsive to determining that the power supply voltage outage lasted greater than a threshold amount of time.

Abstract: 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 displaying images by receiving light emitted from the light source, and modulating the light according to the image data, and a light source controlling unit which adjusts the amount of light that enters the light modulation device, by controlling electrical power fed to the light source, according to the brightness data. Even if a contrast ratio is improved by changing the amount of light of an HID lamp, a passive optical modulation type display apparatus can be provided without reducing the lifetime of the light source lamp.

Abstract: A dimmable arc lamp assembly comprises a lamp enclosure comprising a chamber enclosing a light-emitting material, first and second electrodes extending into the chamber of the lamp enclosure, and a heating element proximate the chamber configured to heat at least a portion of the lamp enclosure to a temperature greater than the boiling point of the light-emitting material such that the light-emitting material remains in a gaseous state. Because the light-emitting material remains above its boiling point during lamp operation, dimming is not susceptible to control issues that can result from condensation of the light-producing material. Such lamps may be used in various applications such as in flat panel displays.

Abstract: An assembly for heating a fluorescent lamp (such as the lamp used in a flat panel display) includes a circuit card having a plurality of transistors each configured to produce heat disposed thereon. A thermally-conductive layer is disposed proximate to the plurality of transistors, and the fluorescent lamp is disposed proximate the thermally-conductive layer such that the heat from the transistors is transmitted to the fluorescent lamp via the thermally conductive layer. By controlling the heat applied to the fluorescent lamp, microclimates in the lamp can be reduced or eliminated, thereby improving the performance of the lamp.

Abstract: Methods for cooling an illumination device are disclosed. The illumination device comprises a cathode, an anode and a cooling fan. A variation of a lamp voltage of the illumination device is first detected. The lamp voltage is the voltage difference between the cathode and the anode, and the variation of the lamp voltage is derived from comparing the lamp voltage which is detected with the lamp voltage at the first time the illumination device is used. A rotational rate of the cooling fan is then adjusted according to the variation of the lamp voltage.

Abstract: 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 supply outputting a first voltage, and a switching device having a first input terminal receiving the first voltage and a first and second output terminal; wherein the first output terminal is coupled to the CCFL circuit outputting a second voltage when the first voltage is higher than a first level, and the second output terminal is coupled to the at least one heating device outputting a third voltage when the first voltage is lower than the first level. The driving device further comprises a controller controlling the power supply to output the first voltage higher than the first level to lighting up the at least one CCFL, and lower than the first level to control the temperature of the at least one CCFL.

Abstract: 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 operational-parameter detection element (E), a heating controller (H) and a first actuating element (S1) are connected. The heating poser of the first filament (W1) is detected by means of the operational-parameter detection element (E) and, on the basis of this, a manipulated variable (SG) is determined, by means of which this first filament (W1) is subjected to closed-loop control. Furthermore, at least one second filament (W2 to Wn), which is not connected in the control loop, is controlled on the basis of the determined manipulated variable (SG).

Abstract: A dynamic color mixing LED device that includes a plurality of light emitting diode units. Each light emitting diode unit includes e.g. a first LED of a first color (e.g. red) and a second LED of a second color (e.g. green). A third LED of a third color (e.g. blue can also be provided). A controller supplies respective driving signals to each of the first LED, second LED, and third LEDs individually. The respective driving signals individually control relative intensity outputs of the respective first LED, second LED, and third LED. With such an individual control each of the light emitting diode units can be controlled to output different color signals.

Abstract: 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 determine an averaged temperature; determining an error between a set-point temperature and said averaged temperature; and automatically adjusting a blower in said projection device based on said determined error. In another example, a method for controlling temperature in a projection device having a lamp and a blower comprises measuring temperature in the projection device; and selectively adjusting both a first signal to the blower and a second signal to the lamp based on said measured temperature to control temperature in the device.

Abstract: 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 production downtime. In particular, a power controller changes the operating voltage and current of the lamp, and controls the temperature of the lamp in order to maintain stable lamp operation at the changed voltage and current.

Abstract: 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 temperature as to avoid the screen from being operated at abnormal temperature and lowering its service life. The present invention utilizes a temperature detector unit connected to a control unit for detecting the ambient temperature and outputting a temperature signal to the control unit. The temperature signal is compared with the predetermined standard temperature to determine the magnitude of a cold cathode fluorescent lamp for suppressing the operation of the screen to the best ambient temperature and maintaining the normal service temperature.

Abstract: 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 method and apparatus in which occurrence of moisture condensation can be prevented, are provided. An LED substrate in which a large number of light emitting diodes (LED) are arranged on the surface thereof in a two-dimensional manner, a base, a Peltier element, and a radiating fin are formed integrally by urging force of a compression spring. The radiating fin is disposed in contact with a light source housing body. Further, in carrying out temperature adjustment control using the Peltier element, the temperature adjustment control is carried out only when the internal temperature of the device in which a light source device is provided, is a predetermined temperature or higher.

Abstract: 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 operatively coupled to the sensor, for storing operating data correlated to the operational parameters of the light emitter. The light source also typically has a light source housing, to which are mounted the light generator, the sensor and the light source data storage device.

Abstract: A temperature adjusting device of the present invention is provided with: LED light sources 11r, 11g and 11b; a temperature sensor 9 for detecting an ambient temperature of each of the LED light sources 11r, 11g and 11b; a cooling fan 20 for cooling the LED light sources 11r, 11g and 11b; a driving circuit 22 for driving the cooling fan 20; and a control unit 4 which on/off controls a voltage to be applied to the cooling fan 20 so as to set the ambient temperature within a predetermined range based upon results of detection by a temperature sensor 9, and in this arrangement, upon on/off controlling the applied voltage, the control unit 4 is allowed to gradually raise/lower the applied voltage.

Abstract: 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 is powered by the normal AC power supply. Additionally, the ballast includes a charging control circuit which precludes charging of the battery when normal AC power is supplied to the ballast charging circuit during the time when the battery is below a temperature for safe and effective charging.

Abstract: 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 cold spot regulation system includes an interface housing secured to the light emitting enclosure and two ducts extending from the interface housing. The cold spot regulation system uses a coolant fluid to lower the operating temperature of the light emitting enclosure. The coolant fluid is diverted into one of the ducts. The coolant fluid is passed by the cold spot of the light emitting enclosure and released out the other duct.

Abstract: 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 second substance which is less readily ionizable than the first substance. According to the invention, the gas discharge lamp is operated such that gases of both substances cans be excited, while the partial pressure of the first substance is adjusted in dependence on the desired spectrum. For this purpose, for example, the current through the lamp may be modulated. In an alternative embodiment, this is suitably achieved in that the partial mercury pressure is varied, for example through an adjustment of the temperature of a mercury amalgam present in the gas discharge lamp. The invention also relates to a gas discharge lamp whose color can be varied during its operation, and to a luminaire provided with a supply for such a lamp.

Abstract: 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. The boosting time is increases as the detected temperature decreases. A switching circuit, powered from a direct current power supply, performs a switching operation based on a determination output from the microcomputer. An inverter circuit actuates the cold-cathode discharge tube based on the switching operation which is duty-controlled. The duty ratio is determined to be higher when the detected surrounding temperature is within a predetermined low temperature range than outside the predetermined low temperature range.

Abstract: 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 communication with the counting means for recording the actual amount of time that the light source has been used. The method includes the steps of supplying power to the light source, counting an actual amount of time that the power has been supplied to the light source, and recording the actual amount of time that power has been supplied to the light source.

Abstract: A unique drive circuit for a fluorescent lamp, as well as a housing for such lamp and drive circuit, are designed for mineral museum displays. The drive circuit comprises a ballast subcircuit, a separate filament transformer subcircuit for pre-heating the lamp cathodes, and a relay between the subcircuits. The separate filament transformer subcircuit obviates the need for a conventional starter circuit for the fluorescent lamp. This way of pre-heating the cathodes prolongs the useful life of the lamp by making it possible for the lamp to undergo thousands of “on-off” cycles without the heretofore usual deterioration of the cathodes. The relay prevents the high voltage of the ballast from “hitting” the lamp cathodes before the cathodes have been pre-heated by the transformer subcircuit. Also a method is designed for using such a lamp, drive circuit, and housing to irradiate fluorescent minerals in a display case.

Abstract: 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 on mode, other circuits and the microcomputer without stopping a projecting lamp and a cooling fan when the reset switch is turned on.

Abstract: 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 includes LEDs soldered onto a circuit board in an equi-distant arrangement. The circuit board with the LEDs is secured in a boat-shaped receiving, heat-dissipating trough, which are disposed in a transparent tube having heat-dissipating holes in the bottom wall thereof and through holes in both ends thereof. The LED tubular lighting devices can be connected in series and controllable to produce changes in colors and luminosity.

Abstract: A dimming control system includes dimmer modules which receive dimming level information from a control module. Each dimmer modules includes a microprocessor which provides internal intelligence for controlling power to a load in response to the dimming level information. The control module receives industry standard protocol dimming information from various sources, converts it to dimming level information, and communicates the dimming level information to the dimmer modules through serial communication lines. The dimmer modules and control module are mounted in a rack which includes a backplane having nonvolatile memory device that retains configuration data even if the control module is removed from the rack. The dimmer modules implement a zero cross prediction method which includes detecting an actual zero cross, calculating an error, and adding the error to the period of a line power signal.

Abstract: 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 operatively coupled to the sensor, for storing operating data correlated to the operational parameters of the light emitter. The light source also typically has a light source housing, to which are mounted the light generator, the sensor and the light source data storage device.

Abstract: 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 flourescent lamp (2). As a result, the fluorescent lamp (2) can be specifically heated in the predetermined regions, the production being simplified at the same time. At the same time, the mounting of the heating element (4) can be performed independently of the flourescent lamp (2), and an adaptation to fluorescent lamps (2) of arbitrary configuration can be undertaken without difficulty.

Abstract: 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 operatively coupled to the sensor, for storing operating data correlated to the operational parameters of the light emitter. The light source also typically has a light source housing, to which are mounted the light generator, the sensor and the light source data storage device.

Abstract: 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 parallel with the light fixture such that the fan comes on automatically whenever the fixture is energized. Air vents are also placed in the housing for both the entrance and exit of the air.

Abstract: 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 a lamp. As power is provided to the lamp, the temperature of the lamp is monitored. When the temperature of the lamp rises to a first predetermined temperature, one or more fans are turned on which are adapted to dissipate the heat generated by the lamp. After the fan(s) cool the lamp to a second, lower predetermined temperature, the fan(s) are turned off. By using a fan to dissipate heat generated by a lamp backlighting module, the present invention may maintain the temperature of the lamp within a desired range. As a result, the present invention preferably increases the reliability and performance of the liquid crystal display.

Abstract: 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 also receive an output from the fixed current power supply. The variable load senses a condition affecting a luminous output of the LED array and varies an impedance based on this sensed condition. This variable load may typically include a thermistor or a photodetector. As the impedance of the variable load changes, current diverted from the LED to the variable load changes. Thereby, current supplied to the LED array, and thereby the intensity LED, can be controlled based on the impedance changing element in the variable load.

Abstract: An illumination device includes a cold cathode fluorescent tube having a heat capacity of 0.035 Wsec/.degree. C. or less per unit length (1 cm) of a glass tube of a fluorescent section of the cold cathode fluorescent tube. The illumination device has a superior operation characteristic at a low temperature. The device is driven by a method and is implemented in a display device.