297results about How to "Increase path length" patented technology

The light-emitting device includes a light-emitting element chip; a package having a first recessed portion thereon, in which the light-emitting chip is disposed; a transparent flexible member covering at least the recessed portion; and a transparent rigid member disposed on or above the transparent flexible member. The package has at least a first front surface extending at least outwardly above the first recessed portion; a second front surface extending outwardly above the first front surface; and a third surface as the outside of the package extending outwardly above the second front surface. The rigid member is disposed in the outline of the second front surface with at least three points of contact. The flexible member is continuously provided along the first front surface, the second front surface and the back surface of the rigid member. This light-emitting device is capable of improved reliability without deteriorating its optical characteristics.

Multi-directional antenna apparatuses, which may include phased array antennas and/or arrays of multiple antennas, and methods for operating these directional antennas. In particular, described herein are apparatuses configured to operate as an access point (AP) for communicating with one or more station devices by assigning a particular directional beam to each access point, and communicating with each station device using the assigned directional beam at least part of the time. Methods and apparatuses configured to optimize the assignment of one or more directional beam and for communicating between different station devices using assigned directional beams are described. Also described are methods of connecting a radio device to an antenna by connecting a USB connector on the radio device to a USB connector on an antenna and identifying the antenna based on a voltage of the ground pin on the antenna's USB connector.

A spin valve device includes a non-magnetic enhancement layer adjacent an ultra thin free layer. The thickness of the free layer may be less than the mean free path of a conduction electron through the free layer. The GMR ratio is significantly improved for free layer thicknesses below 50 Å. The enhancement layer allows electrons to travel longer in their spin state before encountering scattering sites. The electronic properties of the enhancement layer material can be matched with the adjacent free layer without creating a low resistance shunt path. Because the free layer may be made ultra thin and the enhancement layer is formed of a nonmagnetic material, less magnetic field is required to align the free layer, allowing for improved data density. Also, the enhancement layer allows for effective bias point control by shifting sensor current density distribution.

An improved method and apparatus for drilling tapered holes in workpieces with laser pulses is presented which uses defocused laser pulses to machine the holes with specified taper and surface finish while maintaining specified exit diameters and improved system throughput. A system is described which can also drill holes with the desired taper and surface finish without requiring defocused laser pulses.

A multi-reflection mass spectrometer comprising two ion-optical mirrors, each mirror elongated generally along a drift direction (Y), each mirror opposing the other in an X direction and having a space therebetween, the X direction being orthogonal to Y; the mass spectrometer further comprising one or more compensation electrodes each electrode being located in or adjacent the space extending between the opposing mirrors; the compensation electrodes being configured and electrically biased in use so as to produce, in at least a portion of the space extending between the mirrors, an electrical potential offset which: (i) varies as a function of the distance along the drift length, and/or; (ii) has a different extent in the X direction as a function of the distance along the drift length. In a preferred embodiment the period of ion oscillation between the mirrors is not substantially constant along the whole of the drift length.

The invention relates to a white light emitting diode which comprises a base, light emitting crystal grains arranged on the base, a first fluorescent layer which is arranged on the base and covers the light emitting crystal grains and a second fluorescent layer which is arranged on the first fluorescent layer and has a top area smaller than the top area of the first fluorescent layer; the light emitting crystal grains are positioned within orthographic projection range below the second fluorescent layer so as to increase the path length of the fluorescent layer that the forward light of the light emitting crystal grains passes through and improve the color evenness of the white light of the white light emitting diode.

A device and method for accurately performing quantitative diffuse optical spectroscopy on a sample includes a light source and a source optical fiber that is optically coupled to the light source. A diffuser material is interposed between the source optical fiber and the sample, the diffuser material comprising a high scattering, low absorption material. The diffuser material effectively increases the photon path length from the light source to the sample, which limits the depth of interrogation to superficial volumes despite the penetrating nature of the radiation typically used. A detector optical fiber is provided adjacent to or laterally disposed from the source optical fiber. The detector optical fiber is coupled to a detector which detects photons collected in the detector optical fiber. The detector optical fiber and the source optical fiber may be separated by a distance of less than 5 mm while still permitting the diffusion approximation to remain valid.

The invention relates to a small high-isolation double-notch UWB (Ultra-wide Bandwidth) MIMO (Multiple Input Multiple Output) antenna, which comprises a main floor board, a first floor board limb, a second floor board limb, a first metal strap, a second metal strap, a third metal strap, a first antenna unit, a second antenna unit, a first tail end opening gap and a second tail end opening gap, wherein the third metal strap is used for connecting the two floor board limbs. Due to the application of the two floor board limbs, a first excitation port and a second excitation port can be placed on the upper edge of a basal board, so that the impedance bandwidth of the antenna units can be effectively improved, and the isolation between the two antenna units is also effectively increased. The technical problem that the current UWB MIMO antenna cannot simultaneously realize small size, small cross coupling and wide bandwidth is solved. The first metal strap and the first antenna unit form a first annular loop, the second metal strap and the second antenna unit form a second annular loop, so that the high frequency notch is realized. Due to the application of the first tail end opening gap and the second tail end opening gap, the low frequency notch is realized. Therefore, the double-notch function is realized.

A closure assembly for an electrochemical cell including a container and an end assembly sealing an open end of the container in order to minimize mass or weight loss of the cell due to electrolyte vapor transmission is disclosed. The end assembly is provided with a vent member capable of venting a fluid when the pressure within the cell exceeds a predetermined limit; a contact member operatively in electrical contact with a conductive contact of the end assembly and a current collector of an electrode of the cell; and an insulating, polymeric seal member disposed at least between conductive components of the closure assembly having different polarities. In a preferred embodiment, the seal member has a selected dimensional ratio in order to minimize vapor transmission of the electrolyte through the seal member.

Devices for reducing and determining the skew between colour video signals transmitted over at least two different video cables are described. A KVM extender including such devices is also described. The skew reduction device includes a plurality of video signal transmission tracks selectably connectable to each of the video cables to increase the video signal transmission path length so as to more closely matching the total video signal path length for each of the colour video signals. The skew determination device comprises a processing device, a signal generator for applying measuring signals to each of the video signal cables and signal detection circuitry to receive measuring signals transmitted over the video signal cables. Detection signals are output to the processing device which is programmed to determine an indication of the transmission path length difference between the video signal cables.

Disclosed is a photovoltaic solar cell and method for producing same for conversion of light into electric power using a composite film having micron sized down to nanometer sized particles sufficiently sized for precise light scattering. A matrix material is further provided having a substantially different refractive index to provide a refractive index contrast for light scattering.