187results about How to "Reduce light output" patented technology

In a heat dissipating apparatus for an automotive LED lamp, the automotive LED lamp includes an automotive lamp set, a heat dissipating module, a plurality of LEDs, and a reflecting unit. The heat dissipating module is wrapped to form an insulation circuit for separating heat energy and electric power of the insulation circuit and heat dissipating module. The LED is electrically connected to the insulation circuit, and a main base of the LED installs a metal conducting plate for conducting the heat produced by the LED to the heat dissipating module. The reflecting unit is installed in the automotive lamp set, so that the heat dissipating module can use a cold air or a liquid coolant as the heat dissipating medium for dissipating heat, preventing a drop of light output caused by an overheat, and avoiding damages to the LED to extend the life expectancy of the automotive LED lamp.

A device includes a detection unit that detects states of eyelids of a user, and a control unit that performs operations in response to the states of the eyelids of the user detected by the detection unit.

The present invention concerns in general a biosensor in the form of a microchip for the optical detection of analytes and a method using this biosensor. In particular the invention concerns biosensors for detecting an analyte by time-resolved luminescence measurement and a corresponding method.

An OLED display device for displaying a color image, the display device being viewed from a front side includes a plurality of OLED elements including first color elements that emit a first color of light and second color elements that emit a second color of light different from the first color; a reflector located behind the OLED elements; and a corresponding plurality of filter elements aligned with the OLED elements, including first and second color filters for passing the first or second color of light emitted by the corresponding OLED element, and blocking other colors of light.

A color display is provided that includes a light emitting sub-pixel and a filter layer including first and second color filter materials. The first color filter material is adapted to reduce transmittance of visible light outside a first transmittance spectrum corresponding to a first color, and the second color filter material is adapted to reduce transmittance of visible light outside a second transmittance spectrum corresponding to a second color. The second color is different than the first color. A color display having a white-balanced pixel is provided. A method of white-balancing a light emitting device is provided. A method of reducing unwanted light output due to electrical leakage is provided to fall below a pre-determined threshold. An opaque layer may be interposed between the sub-pixels and / or may frame illuminated areas of sub-pixels, and may be a combination of red, green, and / or a blue filter material.

An emergency lighting system with central batteries power remote LED fixtures and exit signs, with all components integrated throughout a single or multiple buildings. Status reports are available on demand and the system will generate written records required by the Life Safety Code. A wide range of fixtures optimized for emergency lighting are available for interior and exterior applications and all can be monitored via internet, with report displays available on any digital device. Easy access to batteries, automated testing, high lumen outputs, efficient optics and long lamp life ensure the lowest possible life cycle costs.

A chemiluminescent substrate of a hydrolytic enzyme having the following general Formula I is disclosed, as follows:Lumi-M-PFormula Iwhere “Lumi” is a chemiluminescent moiety capable of producing light (a) by itself, (b) with MP attached and (c) with M attached. Examples of Lumi include chemiluminescent acridinium compounds, benzacridinium compounds, quinolinium compounds, isoquinolinium compounds, phenanthridinium compounds, and lucigenin compounds, spiroacridan compounds, luminol compounds and isoluminol compounds. M is a multivalent heteroatom having at least one lone pair of electrons selected from oxygen, nitrogen and sulfur, directly attached to the light emitting moiety of Lumi at one end and to P at the other end. P is a group that can be readily removed by hydrolytic enzymes. An enzymatic reaction utilizing the above compound is the following:where HE is a hydrolytic enzyme. Lumi-M is a chemiluminescent product having physical and / or chemical properties different from those of Lumi-M-P.

The package has a base body (51) with a mounting portion for mounting a light-emitting unit. A frame body is joined to an outer edge of the body (51) to surround the portion. A wiring conductor has its one end formed on an upper surface of the base body, to electrically connect an electrode of the light emitting unit. The light transmitting unit (53) is inside the frame body to cover the light emitting unit. - Independent claims are also included for the following: - (A) a light-emitting apparatus comprising a package for housing a light emitting unit - (B) an illumination apparatus constructed by setting up a light-emitting apparatus in a predetermined arrangement.

An optical signal generator is configured with an associated control system and driver configured to reduce speckle. Speckle reduction occurs by pulsing the drive signal between a first current level and a second current level. These pulses force the optical signal generator to introduce oscillations into the optical signal. The coherence of the emitted light is reduced during the period of oscillations in the optical signal, which reduces speckle. In one embodiment, the pulsing of the drive signal brings the drive signal down to a level near or below threshold, which in turn intermittently turns off the optical signal output. Returning the optical signal to a desired optical output intensity introduces the speckle reducing oscillation. The pulse frequency, and duty cycle is controlled by a duty cycle control signal to modulate overall optical power and adjust amount of despeckle.

The invention relates to methods and devices for recording three-dimensional distance-measuring images of an object surface by measuring light propagation time using a short-term integrated photodetector. For starting a light-induced pulse on the transmission side, a trigger signal is produced that is at the same time used on the receiving side for opening at least one integration window for receiving back-scattered light-induced pulses with a predetermined time delay. A predetermined event such as a maximum or a zero crossing is detected which, by its interval relative to the integration windows, determines a trigger delay. The trigger delay is correlated with the light propagation time and allows calculation of the object point distance d.

Provided are a multiple reflection layer electrode, a compound semiconductor light emitting device having the same and methods of fabricating the same. The multiple reflection layer electrode may include a reflection layer on a p-type semiconductor layer, an APL (agglomeration protecting layer) on the reflection layer so as to prevent or retard agglomeration of the reflection layer, and a diffusion barrier between the reflection layer and the APL so as to retard diffusion of the APL.

A method for driving a planar light source device is provided. The planar light source device includes (a) a plurality of planar light source units to light a color LCD device from the back, each planar light source unit including a red LED, a green LED, and a blue LED; and (b) a driving circuit to perform ON / OFF control of the red LED, the green LED, and the blue LED included in each planar light source unit on the basis of pulse-width modulation. The method includes adjusting respective pulse-width modulation unit clocks CLR-unit, CLG-Unit, and CLB-Unit in each planar light source unit to long or short by increasing or decreasing the number of frequency division cycles of a system clock in the driving circuit.

An illumination apparatus includes a light source; a sensor which has an image sensor and detects an illuminance and a presence of a human based on a captured image while setting a range overlapping a range illuminated by the light source as a visual field; an illuminance determining unit for varying a light output from the light source based on the illuminance and the presence of a human; and a dimming control unit. The illuminance determining unit obtains an illuminance of an illuminance maintaining area included in the visual field based on the captured image, and when the sensor detects no human, the illuminance determining unit reduces the light output while maintaining the illuminance of the illuminance maintaining area to be equal to or greater than a threshold that is set in advance as a lower limit illuminance, which makes it feasible for the image sensor to capture an image.

The present invention is a system and method for laser-assisted singulation of light emitting electronic devices manufactured on a substrate, having a processing surface and a depth extending from the processing surface. It includes providing a laser processing system having a picosecond laser having controllable parameters; controlling the laser parameters to form light pulses from the picosecond laser, to form a modified region having a depth which spans about 50% of the depth and substantially including the processing surface of the substrate and having a width less than about 5% of the region depth; and, singulating the substrate by applying mechanical stress to the substrate thereby cleaving the substrate into said light emitting electronic devices having sidewalls formed at least partially in cooperation with the linear modified regions.

The scintillator single crystal of the invention is a specific cerium-activated silicate single crystal wherein the total content of one or more elements selected from the group consisting of elements belonging to Groups 4, 5, 6 and Groups 14, 15, 16 of the Periodic Table is no greater than 0.002 wt % based on the total weight of the single crystal.

The invention belongs to the field of high-power LED street lamp technology, concretely relating to a control method and a device for realizing long service life light intensity of a high-power light emitting diode street lamp. The invention has an adoption of closed-loop digital control; output light of LED is maintained to be strong in the whole service life span; and light decay thereof is compensated, thus guaranteeing a satisfactory luminous intensity in the service period of the street lamp; meanwhile, the service life of the LED street lamp can be prolonged. Concretely, optical signal output by the LED is detected, amplified, and converted by the device; the signal is filtered and judged and false signals are removed. In turn, light output of the lamp is regulated according to the light decay size obtained by calculation. The control method and a device for realizing long service life light intensity of a high-power light emitting diode street lamp also comprises a method for judging expiration of the service life of the lamp and sending out warning signal to an upper system at the expiration of the service life.

A semiconductor light emitting element of the present invention includes a support substrate, a semiconductor film including a light emitting layer, a surface electrode provided on the surface on a light-extraction-surface side of the semiconductor film, and a light reflecting layer. The surface electrode includes first electrode pieces that form ohmic contact with the semiconductor film and a second electrode piece electrically connected to the first electrode pieces. The light reflecting layer includes a reflecting electrode, and the reflecting electrode includes third electrode pieces that form ohmic contact with the semiconductor film and a fourth electrode piece electrically connected to the third electrode pieces and placed opposite to the second electrode piece. Both the second electrode piece and the fourth electrode piece form Schottky contact with the semiconductor film so as to form barriers to prevent forward current in the semiconductor film.

A pulsed lamp is supplied wherein electrons are supplied from a substantially flat cold cathode having low effective field emission work function and are accelerated to excite light emission from a phosphor layer on a transparent anode plate. The emission site density of the cathode and emission current characteristics vs electric field are selected to provide high light output while requiring only small duty cycle pulses from a voltage generator.

A load control system includes: a power supply control unit for controlling a power feeding to multiple load devices; and a backup power supply unit for supplying backup power during a power failure. During a power failure, the power supply control unit supplies the power from the backup power supply unit only to a part of load devices selected among the load devices, and the load devices are devoid of communications function for communicating with the power supply control unit.

A semiconductor light emitting element includes a group III-V compound semiconductor layer, a first main surface and a second main surface, a reflection metal film formed on the second main surface, a front surface electrode formed on the first main surface, and an ohmic contact joint part formed between the reflection metal film and the group III-V compound semiconductor layer except a region directly under the front surface electrode. The ohmic contact joint part is disposed in a side of an outer peripheral part of the semiconductor light emitting element, formed so as to surround the front surface electrode when the ohmic contact joint part is viewed from a side of the front surface electrode, and disposed so that distance from each location of outer edge parts of the front surface electrode to the ohmic contact joint part nearest to the each location becomes equal to each other.

The present invention relates to a street light comprising means for determining a traffic related activity and control means for operating the street light according to the determined traffic related activity. A corresponding method for operating a street light is also disclosed.

There is provided a lighting system capable of suppressing a decrease in light output while preventing occurrence of glare. The lighting system of the present invention includes a light-emitting device and a jig for light control. The light-emitting device includes a plurality of light-emitting elements arranged so as to be distributed on a substrate, and the jig for light control is made up of a resin plate having a plurality of discrete openings for light-emitting surface partitioned by a louver. The light-emitting device and the jig for light control are overlaid so that a light-emitting portion is exposed from the plurality of discrete openings for light-emitting surface.

An electronic ballast is capable of realizing high frequency lighting of a discharge lamp and switching between at least two lighting modes with different light outputs. The ballast includes a preheating circuit having a winding component connected in parallel with a main resonant circuit with a lamp current flowing therein for the discharge lamp. A constant preheating current for the lamp filaments is supplied from a secondary winding of the winding component during lighting of the discharge lamp and a path of a current flowing on a primary winding side of the winding component is switched by a switch according to the lighting mode.

The chip LED includes a plurality of semiconductor chips at least one of which is a light-emitting element; a recess formed on the packaging substrate having a rear-side metallic layer on the rear-side thereof, and a metallic layer formed on the bottom surface and inner wall surface of the recess; the light-emitting element being die-bonded to the metallic layer formed on the bottom surface of the recess and being wire-bonded to a wiring pattern deposited on the surface of the packaging substrate; and the metallic layer formed on the bottom surface of the recess being electrically conducted to the rear-side metallic layer formed on the rear side of the packaging substrate.

A light polymerization device for polymerization of a polymerizable material includes a hand-held device having a multi-branch electrical supply receptacle or a multi-prong electrical supply plug for the connection of the hand-held device with the storage battery assembly or with a connection module, which, in particular, makes available a releasably connectable electrical supply connection as well as a data bus port or interface. A base station comprises a single receptacle or several receptacles for the receipt of the storage battery assembly. The base station can comprise an electrical supply plug connection via which the base station is supplied with electrical energy, especially electrical energy supplied via a power pack.

To provide an illuminating device-cum-air cleaning device that solves a heat problem and allows efficient operation of an air cleaning means.Air inlets / outlets 3A and 3B are provided in a wall surface of a housing 10 to which an illumination light source 2 is attached. A fan 4 is provided in the housing 10 to generate a forced air flow inside and outside the housing 10 through the air inlets / outlets 3A and 3B and discharge heat from the illumination light source 2 by the forced air flow to the outside of the housing 10. In the middle of a flow path for the forced air flow a within the housing 10, a photocatalyst 50 facing the flow path and a UV light source 51 irradiating the photocatalyst 50 with light including ultraviolet rays are provided as air cleaning means 5.