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

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.

A LED lighting lamp tube comprises a transparent tube body, lamp caps, electrode pins, pedestals mounted at the connection position of the transparent tube body and the lamp caps, a power supply converter located adjacent to the lamp caps and inside the tube body, a PCB and a plurality of LED mounted on the PCB. These LED are connected in parallel or in series, and a light-scattering plate may be disposed over these LED. A plurality of LED chips can be directly mounted on the light-scattering plate. The lamp caps and the electrode pins possess the same international standards as common lamp tubes.

An omni-directional LED device is constructed such that light is prevented from exiting from the top of the LED device. In one embodiment, an opaque barrier is created and in some embodiments enhancement surfaces are created below the opaque barrier to increase lumen output from the device sides. In one embodiment, a reflecting structure is created to assist with horizontal light mixing. The horizontally mixed light is then redirected through a structure, such as an LED structure, to create a high lumen output, slender back-lighted display.

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.

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.

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 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 LED unit for a vehicle lamp assembly. The LED unit is comprised of a housing, one or more LEDs, a light pipe, and an optic structure. The housing contains the LEDs and has the light pipe extending therefrom. The light pipe is sized sufficiently narrow for extending through a hole formed in a base portion of the vehicle lamp assembly. The light pipe is attached to an optic structure. The vehicle lamp assembly transmits light in a unilateral direction distal to the housing through the light pipe and the optic structure. The optic structure scatters light in a series of directions distal to the housing.

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.

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.

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 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.

A plasma lamp apparatus includes a post structure with a material overlying a surface region of the post structure, which has a first end and a second end. The apparatus also has a helical coil structure configured along the post structure. The apparatus includes a bulb with a fill material capable of emitting electromagnetic radiation. A resonator coupling element configured to feed radio frequency energy to at least the helical coil causes the bulb device to emit electromagnetic radiation.

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.

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.