摘要:
A light emitting apparatus (10, 110, 210, 310, 410) includes one or more light emitting chips (12, 112, 212, 312, 412) and a support (13, 14, 114, 214, 314, 414) on which the light emitting chips are disposed. The support includes a first side on which the light emitting chips are attached and a second side opposite the first side. A thermally superconducting heat transfer medium (22, 122, 222, 322, 422) is disposed in an interior volume of the support and thermally connects the first and second sides of the support. The thermally superconducting heat transfer medium has a thermal conductivity at least 1500 times greater than the thermal conductivity of copper.
摘要:
The present invention is directed towards a source of ultraviolet energy, wherein the source is a UV-emitting LED. In an embodiment of the invention, the UV-LED is characterized by a base layer material including a substrate, a p-doped semiconductor material, a multiple quantum well, a n-doped semiconductor material, upon which base material a p-type metal resides and wherein the LED's are provided with a rounded mesa configuration. In a specific embodiment, the p-type metal is positioned upon a rounded mesa, such as a parabolic mesa, formed out of the base structure materials.
摘要:
A semiconductor device die (10, 116) is disposed on a heat-sinking support structure (30, 100). Nanotube regions (52, 120) contain nanotubes (54, 126) are arranged on a surface of or in the heatsinking support structure (30, 100). The nanotube regions (52, 120) are arranged to contribute to heat transfer from the semiconductor device die (10, 116) to the heat-sinking support structure (30, 100). In one embodiment, the semiconductor device die (10) includes die electrodes (20, 22), and the support structure (30) includes contact pads (40, 42) defined by at least some of the nanotube regions (52). The contact pads (40, 42) electrically and mechanically contact the die electrodes (20, 22). In another embodiment, the heat-sinking support structure (100) includes microchannels (120) arranged laterally in the support structure (100). At least some of the nanotube regions are disposed inside the microchannels (100).
摘要:
A thermal transfer device having a first substrate layer, a second substrate layer and first and second electrodes disposed between the first substrate layer and the second substrate layer. The thermal transfer device also includes a release layer disposed between the first electrode and the second electrode and an actuator disposed adjacent the first and second electrodes. The actuator is adapted to separate the first and second electrodes from the release layer to open a thermotunneling gap between the first and second electrodes, and wherein the actuator is adapted to actively control the thermotunneling gap.
摘要:
A light emitting diode (10) has a backside and a front-side with at least one n-type electrode (14) and at least one p-type electrode (12) disposed thereon defining a minimum electrodes separation (delectrodes). A bonding pad layer (50) includes at least one n-type bonding pad (64) and at least one p-type bonding pad (62) defining a minimum bonding pads separation (dpads) that is larger than the minimum electrodes separation (delectrodes). At least one fanning layer (30) interposed between the front-side of the light emitting diode (10) and the bonding pad layer (50) includes a plurality of electrically conductive paths passing through vias (34, 54) of a dielectric layer (32, 52) to provide electrical communication between the at least one n-type electrode (14) and the at least one n-type bonding pad (64) and between the at least one p-type electrode (12) and the at least one p-type bonding pad (62).
摘要:
Embodiments of the invention include a particle detection system that includes a light emitting source, a non-collimating reflector, a collimating reflector, and a detector. Light from the light emitting source is directed by the non-collimating reflector to an area through which a particle stream may be transmitted. Fluorescent light from the light striking particles is redirected to the collimating reflector and then on to the detector. Other embodiments include a single pump used to pull a pair of fluid flows through the detection system. Other embodiments include a plurality of light emitting sources whose light is directed to a particle stream by a single reflector. Other embodiments include a method for detecting particles.
摘要:
A method of manufacturing a heat transfer device including providing first and second thermally conductive substrates that are substantially atomically flat, providing a patterned electrical barrier on the first or second thermally conductive substrates and disposing a low work function material on the first or second thermally conductive substrates in an area oriented between the patterned electrical barrier in a configuration in which the first and second thermally conductive substrates are positioned opposite from one another. The method also includes bonding the first and second thermally conductive substrates in the configuration and extracting a plurality of units having opposite sections of the first and second thermally conductive substrates, each unit having a portion of the patterned electrical barrier disposed about the low work function material.
摘要:
A light emitting apparatus (10, 110, 210, 310, 410) includes one or more light emitting diode chips (12, 112, 212, 312, 412) disposed on a chip support wall (16, 116, 216) including printed circuitry (34, 134, 234, 360, 362, 460, 462) connecting with the light emitting diode chips. A heat pipe (24, 124, 224, 324, 424) has a sealed volume (22, 122, 222, 322, 422) defined by walls including the chip support wall and at least one additional wall (18, 20, 118, 120, 218). The heat pipe further includes a heat transfer fluid (26, 226, 326, 426) disposed in the sealed volume.
摘要:
A light emitting package (8, 8′, 8″, 208, 408) includes a printed circuit board (10, 10′, 10″, 210, 410) supporting at least one light emitting die (12, 12″, 14, 16, 212, 412). A light transmissive cover (60, 60′, 60″, 260, 460) is disposed over the at least one light emitting die. The cover has an open end defining a cover perimeter (62, 62′, 62″, 262, 462) connected with the printed circuit board. An inside surface of the cover together with the printed circuit board defines an interior volume (70, 70″, 270, 470) containing the at least one light emitting die. An encapsulant (76, 76″, 276, 278, 476) is disposed in the interior volume and covers at least the light emitting die.
摘要:
A method of applying at least two phosphors to an LED, wherein a first phosphor material having a lower absorption, shorter luminescence decay time, and/or lower thermal quenching than a second phosphor material is positioned closer to the LED than the second phosphor. Such an arrangement provides a light emitting device with improved lumen output and color stability over a range of drive currents.