65results about How to "Increase lumen output" patented technology

A method and apparatus is provided for a multiple light-source illuminating device, the design and construction of which is derived from the lighting requirements of a specific lighting application. The resulting illuminating device (16) provides illumination according to the principles of lighting practice for the optimal performance of visual tasks. Coupling with sensors (21) and logical control (20) allows illumination intensity and spectrum to be varied according to changing user needs. The illuminating device includes multiple discrete light emitting components of different spatial intensity distribution and color spectrum mounted in specific orientations such that the application oriented combined lighting effect is created. The control is provided via a differentiated power supply (19) capable of affecting the current, voltage and duty cycle determining the relative contribution of each light source effecting a different spatial intensity distribution and color spectrum.

A low voltage ceiling or wall mounted light fixture for residential and commercial lighting includes a plurality of high lumen white LED lights incorporated within the fixtures, a light color diffusion panel and a household current to low voltage DC converter within the fixture to convert the AC current to low voltage DC current, reducing the power required for illumination without replacement of the LED lights.

Prism elements having TIR surfaces placed in close proximity to the active area of a SLM device 302 to separate unwanted off-state 324 and / or flat-state 326 light from the projection ON-light bundle 322. The TIR critical angle of these prisms is selected to affect either the off-state light or additionally, any portion of flat-state light reflected from the SLM. These TIR surfaces are placed to immediately reflect the unwanted light as it comes off the SLM, thereby preventing the contamination of light along the projection path, which tends to degrade the system contrast. To further improve the optical performance of the system, these TIR prisms can be attached directly to the SLM package 300, completely eliminating the package window. Also, these TIR prism can be coupled to DMDs having asymmetric mirrors, which tilt through a larger angle for the ON-light to provide high etendue and lumen output, but through near-zero degrees for the OFF-light, thereby improving the separation of any unwanted light from the off / flat states.

The invention is a low voltage ceiling or wall mounted light fixture for residential and commercial lighting, having included a plurality of high lumen white LED lights incorporated within the fixtures, a light color diffusion panel and a household current to low voltage DC converter within the fixture to convert the AC current to low voltage DC current, saving on the cost of power required to provide illumination for the resident or commercial application and virtually eliminating the need to replace incandescent or fluorescent bulbs, the LED lights having an average duration of over 150,000 hours.

A light therapy device for alleviating medical disorders is provided. The light therapy device comprises a housing having a pair of first side walls, a pair of second side walls, a pair of side walls, and a bottom wall with the second side walls being between the first side walls and the bottom wall, the first side walls being substantially perpendicular to the bottom wall, and the side walls being substantially perpendicular to the first side walls and the bottom wall. A light bulb is positioned within the housing. An angled light reflective panel is positioned between the bottom wall of the housing and the light bulb wherein the light reflective panel reflects light and heat in a general direction toward the first side walls, the second side walls, and opposite the bottom wall thereby removing light and heat from behind the light bulb.

The invention discloses an LED linear constant current control circuit. The LED linear constant current control circuit comprises: an input voltage sampling network, which is used for carrying out sampling on an input voltage; a comparison and logic control circuit, which is used for outputting a comparison result according to a sampling voltage of the input voltage sampling network and a threshold voltage; and a multipath selection switch, which is used for controlling a portion of or whole LED conduction according to the comparison result. In addition, the LED linear constant current control circuit also includes a current control loop, which is used for controlling currents flowing through the LED. Meanwhile, the invention discloses an LED linear circuit.

Prism elements having TIR surfaces placed in close proximity to the active area of a SLM device to separate unwanted off-state and / or flat-state light from the projection ON-light bundle. The TIR critical angle of these prisms is selected to affect either the off-state light or additionally, any portion of flat-state light reflected from the SLM. To further improve the optical performance of the system, these TIR prisms can be attached directly to the SLM package, completely eliminating the package window.

The invention discloses an LED linear driving circuit applicable to a thyristor dimmer and a control method. The thyristor dimmer is connected with an input end of the LED linear driving circuit through a rectifier bridge. The LED linear driving circuit is characterized by comprising an LED light string, an LED driver, a voltage sampling network, an absorption control circuit and a current absorption circuit, the LED light string is formed by serially connecting at least one LED, the LED driver comprises N LED driving circuits, each LED driving circuit is connected with cathodes of a group of LED loads so as to control on or off of single or all LED groups, the voltage sampling network is used for detecting output voltage of the rectifier bridge and outputting a signal, the absorption control circuit is used for controlling the current absorption circuit according to the output signal of the voltage sampling network, and the current absorption circuit is used for providing the thyristor dimmer with stable holding current.

A combination wind direction and wind speed indicating apparatus for providing enhanced visibility at night and under other low visibility conditions is mounted, for example, at an airport landing zone, to rotate in the wind and indicates wind direction with high-intensity colored lights mounted in a specified array about the horizontal periphery of the apparatus; a vertical array of lights is illuminated in response to incremental wind speed variations. The apparatus can include a self-contained source of electrical power such as a rechargeable battery pack connected via appropriate circuitry to a solar power cell.

A reflective LED light tube assembly includes a bulb portion, a plurality of LEDs disposed inside the bulb portion on two longitudinal parallel facing heat dissipating reflective PCBs, both longitudinal PCB edges are longitudinally connected to a longitudinal reflective top portion and a longitudinal clear bottom portion, a pair of internally reflective end caps disposed at opposite ends of the bulb portion, a power supply circuit is disposed within one or both of the end caps or on the back of both PCBs, and a pair of male bi-pin electrical connectors extending from both end caps for electrical communication with the fluorescent light fixture's two tombstone female electrical connectors. One or both of the tombstone electrical connectors are in direct communication with an AC or DC power supply or circuit, which may also include a dimming feature. The LEDs illuminate in response to the electrical AC or DC current received in the power supply circuit.

An alumina-based ceramic wavelength converter is described having a surface layer containing a second phase of alumina, preferably as alumina crystallites. The surface layer is formed as a result of the sintering process used to form the bulk ceramic which is itself substantially transparent. The ceramic wavelength converter is combined with a light emitting diode to form a light emitting device. Preferably, the ceramic wavelength converter is comprised of an alumina-based phosphor represented by a general formula A3B5O12:Ce, wherein A is Y, Sc, La, Gd, Lu, or Tb and B is Al, Ga or Sc.

The invention relates to the field of semiconductor materials and device processes, in particular to a semiconductor photoelectric device. The invention provides a front-mounted integrated unit light-emitting diode, which comprises a first conductive type electrode, a second conductive type electrode and a diode mesa structure positioned between the first conductive type electrode and the second conductive type electrode. The diode mesa structure comprises a plurality of diode units, and the plurality of diode units are arranged in a geometrical shape. The technical problem that in the prior art, a diode structure is greatly limited in three important parameters of lumen efficiency, lumen density output and lumen cost is solved, lumen output of a unit area chip is improved, and lumen costis reduced.

In various embodiments, a light emitting diode (LED) flood lamp is provided. The LED flood lamp may include a base cap; a first housing having a first end and a second end, the first end secured to the base cap; a second housing having at least in part a partially conical shape, an end of the second housing having a smaller diameter secured to the second end of the first housing; at least one LED secured within the second; driver circuitry secured within the LED flood lamp between the end of the base cap and the at least one LED; a reflector having a partially conical shape; and a diffuser element secured to at least one of a wider end of the reflector or the end of the second housing having the larger diameter. In some embodiments, the first or second housing may include one or more vents.

A method for fabricating a composite useful in a white light emitting device, includes mixing a phosphor and a filler to form a mixture; sintering the mixture (e.g., using spark plasma sintering) to form a composite; and annealing the composite to reduce oxygen vacancies and improve optical properties of the composite. Also disclosed is a white light emitting device including a laser diode or light emitting diode optically pumping the phosphor in the composite to produce white light. The composite fabricated using the method (and having. e.g., at most 50% phosphor by weight) can (1) reduce an operating temperature of the phosphor by 55 degrees, (2) increase an external quantum efficiency (e.g., by at least 15%) of the white light emitting device, and (3) result in color points and quality of the white light that is equal to or improved, as compared to without the filler.

The invention belongs to the technical field of semiconductor lighting, and particularly relates to LED area light source modules capable of being spliced in an array. The LED area light source modules comprise LED area light source module bodies as well as a strip positive pole welding disc, a strip negative pole welding disc, a ceramic substrate and connecting wires, wherein the positive pole welding disc and the negative pole welding disc of the LED area light source module bodies are respectively arranged on two sides of the ceramic substrate; a plurality of welding spots on the positive pole welding disc and the negative pole welding disc are welded with the positive pole and negative pole connecting wires; a plurality of the LED area light source module bodies are closely distributed to form an area array LED light source module, so that the light-emitting surfaces of the LED area light source module bodies can be extended and the light source power can be improved; and the homopolar electric connection between two adjacent LED area light source module bodies on the same side can be achieved through the positive pole and negative pole connecting wires. The LED area light source modules provided by the invention have the advantages that wire grooves which are defined by dam glue are left in two sides of the positive pole welding disc and the negative pole welding disc; the positive pole and negative pole connecting wires as well as the welding spots are potted and hidden by adopting a potting sealant, and prevented from being exposed; and the transparent dam glue is adopted around a fluorescent silica gel light-emitting area, so as to reduce the dark space of the module splicing joints.

The invention relates to an optical module comprising two or more segments positioned around an axis of symmetry of the module. Each segment includes a light collimating structure for providing a predefined light distribution of light exiting the module and a light source assembled in a cavity within the light collimating structure. The center of the cavity coincides with the optical axis of the light collimating structure and is at a distance (d) from the axis of symmetry of the module. Including two or more segments where each segment comprises its own light source allows obtaining higher lumen output compared to prior art luminaires having only one light source while arranging the segments so that the center of each cavity coincides with the optical axis of the collimating structure of the segment allows preserving narrow beamwidth collimation of the light exiting the module.

A method is described for etching ceramic phosphor converters. The method includes contacting a surface of the converter with a solution of phosphor acid for a time sufficient to etch the converter. The method is applicable to ceramic phosphor converters comprising a phosphor having a general formula MxAlyOz:RE wherein M is a metal and RE is a rare earth element

The invention discloses a preparation method of a calcium molybdate / molybdenum disulfide composite luminescent material. The preparation method specifically comprises the following steps: dissolving 0.85g of sodium molybdate into 30mL of water, stirring for 5 minutes so as to generate a sodium molybdate water solution, pouring the sodium molybdate water solution into a polytetrafluoroethylene liner, soaking two egg shells into water, taking off inner membranes attached to the egg shells, and putting the inner membranes into the sodium molybdate water solution; and putting the polytetrafluoroethylene liner into a reaction kettle, sealing the reaction kettle, putting the reaction kettle into a drying oven to react at 160-240 DEG C for 24 hours, taking out the product, cleaning the product to be neutral by virtue of deionized water and absolute ethanol, and drying at 40 DEG C for 6-48 hours, so as to obtain the calcium molybdate / molybdenum disulfide composite luminescent material. The composite luminescent material can emit blue light and green light under an ultraviolet excitation condition. The simultaneous emission of the blue light and the green light is realized by virtue of compounding of molybdenum disulfide for the first time on the premise that a rare earth element is not introduced, and a synthetic process is relatively simple and low in cost.

Optical systems capable of use in a variety of lighting applications particularly including industrial high bay and similar applications, the systems of the invention deliver energy efficient and effective light distribution through use of dual reflector arrangements wherein an inner reflector having a divergent and convergent profile is stationary relative to a lamp to form an inner reflector / lamp assembly, a prismatic outer reflector being displaceable relative to the inner reflector / lamp assembly to produce differing photometric distributions.

Lighting device (1) comprising a plurality of LEDs (2a - 2h) and a movable member (3) comprising a plurality of translucent segments (S1 - S8) arranged such that the light from the LEDs (2a - 2h) is transmitted therethrough. At least one of the translucent segments (S1 - S8) comprises a wavelength conversion material. The lighting device (1) further comprises a control unit (5) for adjusting the color of the light emitted from the lighting device by controlling the power supplied to each one of the LEDs (2a - 2h) in correspondence to the movable member (3), and by controlling the total power supplied to the lighting device (1) independently from the power supplied to each one of the plurality of LEDs (2a - 2h).

Systems and methods which provide a versatile lighting module which may be utilized alone or in combination with other lighting modules to provide any number of lighting unit configurations are shown. Lighting modules of embodiments herein are adapted to facilitate electrical connection, whether to one or more power supply and / or to one or more other lighting module, along any portion of the entire periphery of the lighting module. Accordingly, lighting modules may be coupled together in any orientation, geometry, and topology to cooperate as a light source having various desired characteristics according to embodiments herein.

Improved arrays of high voltage vertical-emitting LEDs that generate substantially lower heat than conventional LED arrays are provided. In particular, the present invention provides an array of high-voltage vertical LEDs each of which includes a first electrode positioned on a light-emitting face and a second electrode. A conductive matrix surrounds each LED and electrically communicates with each of the electrodes while an electrically-insulating material is positioned between adjacent diodes such that a first electrical current path is defined between the second and first electrodes through each diode. An isolating material is positioned in the conductive matrix between adjacent LEDs to isolate the adjacent second electrodes from one another. Further positioned between adjacent diodes is a material capable of permanently lowering its resistance to provide an alternate electrical pathway following a failure of an individual LED. High reliability high voltage vertical LED arrays are thereby provided.