Abstract: A field emission electron source includes at least one electron emission member. Each electron emission member includes a conductive body and an electron emission layer formed on the conductive body. The conductive body has an upper portion. The electron emission layer is formed on, at least, the upper portion of the conductive body. The electron emission layer includes a glass matrix; and at least one carbon nanotube, and a plurality of metallic conductive particles and getter powders dispersed in the glass matrix. A method for making such field emission electron source is also provided.

Abstract: A circuit board assembly (100) includes a circuit board (10) and at least one electrical element (20). The circuit board includes a dielectric substrate (12) including a supporting surface (13), and at least one connecting part (14) formed on the supporting surface. The at least one electrical element is electrically connected to the at least one connecting part via a connecting media (28). At least one air-exhaust hole (16) extends through the connecting part and the dielectric substrate. The at least one air-exhaust hole is configured for exhausting air from the connecting media.

Abstract: A projector includes a projecting module for projecting a projecting image on a screen panel, an image sensor for capturing an image of an object which is located outside of the projecting module and faces toward the lens module, a light director, and a controlling unit. The projecting module has a lens module and a light source for emitting light transmitting through the lens module. The light director is movable between a first position where the light director is located outside of a light path associated with the lens module, and a second position where the light director is configured for directing light of the object through the lens module to be incident on the image sensor. The controlling unit controls the light director to move between the first and second positions.

Abstract: A method for manufacturing a hollowed printed circuit board includes steps of: providing an electrically conductive layer; laminating a first dielectric layer having a first through opening defined therein on a first surface of the electrically conductive layer; forming a protecting layer on the first surface of the electrically conductive layer in the first opening; creating an electrically conductive pattern in the conductive layer; removing the protecting layer; and laminating a second dielectric layer having a second through opening defined therein on an opposite second surface of the electrically conductive layer in a manner that the first through opening is aligned with the second through opening, thereby a portion of the electrically conductive layer is exposed to exterior through the first through opening and the second through opening.

Abstract: A stereo projection optical system includes a polarizing beam splitter, a 2-way wheel, a digital micro-mirror device, and a total internal reflection prism. The polarizing beam splitter is configured for emitting two light outputs. The 2-way wheel includes a reflective region and a transmissive region. The reflective region is configured for reflecting the light outputs and the transmissive region is configured for transmitting the light outputs. The digital micro-mirror device is configured for superimposing spatial information on the light outputs. The total internal reflection prism configured for coupling the light outputs of the 2-way wheel into the digital micro-mirror device and transmitting a light output of the digital micro-mirror device. The stereo projection optical systems provide viewers three-dimensional images formed by two alternative polarized light beams whose polarizations are perpendicular to each other utilizing the 2-way wheel.

Abstract: A field emission lamp (2) includes a tubular-shaped housing (20), a first electrode (22), an electron emitting layer (24), a second electrode (26), and a fluorescent layer (28). The housing (20) has an inner surface. The first electrode (22) is centrally and longitudinally accommodated in the housing (20). The electron emitting layer (24) is disposed on the first electrode (22). The second electrode (26) is spaced apart from the first electrode (22) and includes a reflective layer (261). The reflective layer (261) is disposed on a portion of an inner surface of the housing (20). The fluorescent layer (28) is disposed on the reflective layer (261).

Abstract: A pixel tube for a field-emission illumination/display device includes a sealed container, an anode electrode, a cathode electrode and a shielding electrode. The sealed container has a light permeable portion. The anode electrode is disposed in the sealed container and adjacent to the light permeable portion. The cathode electrode is arranged in the sealed container facing the anode electrode and includes a cathode supporter and a carbon nanotube yarn, the carbon nanotube yarn attached to the cathode supporter and extending toward the anode electrode for emitting electrons therefrom. The shielding electrode is disposed on a surface of the sealed container and surrounds/encircles the carbon nanotube yarn.

Abstract: An air gun equipment (10) for cleaning workpieces includes an air gun (20), a switch (50) connected to the air gun and an air source by pipes (206, 70), and a sensor (30) fixed on the air gun. The switch is controlled by an output signal from the sensor to control the flow of air from the air source to the air gun.

Abstract: A field emission cathode includes a conductive substrate and a carbon nanotube film disposed on a surface of the conductive substrate. The carbon nanotube film includes a plurality of successive and oriented carbon nanotube bundles parallel to the conductive substrate, the carbon nanotubes partially extrude from the carbon nanotube film. A method for fabricating the field emission cathode includes the steps of: (a) providing a conductive substrate; (b) providing at least one carbon nanotube film, the carbon nanotube film including a plurality of successive and oriented carbon nanotube bundles joined end to end, the carbon nanotube bundles parallel to the conductive substrate, and (c) disposing the at least one carbon nanotube film to the conductive substrate to achieve the field emission cathode.

Abstract: A heat dissipation device includes a base for thermally engaging with an electronic device, a fin assembly including of multiple fins, a first heat pipe and a second heat pipe. The first heat pipe includes two evaporation sections engaged in the base, two interconnecting condensation sections parallel to the evaporation sections and respectively thermally inserted in a central portion of the fin assembly, and two connecting sections interconnecting corresponding condensation sections and the evaporation sections. The second heat pipe includes two evaporation sections engaged in the base, two interconnecting condensation sections parallel to the evaporation sections and respectively thermally inserted in an upper portion of the fin assembly far away from the base, and two connecting sections interconnecting corresponding condensation sections and evaporation sections of the second heat pipe.

Abstract: A heat dissipation device comprises a radiator comprising a collar, a core received in the collar and a helical heat pipe embedded in a circumferential face of the core. The collar has a receiving hole and a plurality of fins extending radially and outwardly from an outer face of the collar. The core together with the heat pipe is received in the receiving hole of the radiator. The core has a flat bottom face and a top face opposite to the bottom face. The heat pipe is located between the radiator and the core and thermally contacts the collar of the radiator and the core. The heat pipe extends from the bottom face of the core to the top face of the core, and has a flattened bottom face coplanar with the bottom face of the core for contacting with an electronic device.

Abstract: A field-emission-based flat light source includes the following: a light-permeable substrate; a plurality of line-shaped cathodes; an anode; a light-reflecting layer; and a fluorescent layer. The light-permeable substrate has a surface, and the line-shaped cathodes, with a plurality of carbon nanotubes formed and/or deposited thereon, are located on the surface of the light-permeable substrate. The anode faces the cathodes and is spaced from the cathodes to form a vacuum chamber. The light-reflecting layer is formed on the anode and faces the cathode. The fluorescent layer is formed on the light-reflecting layer.

Abstract: A camera module includes an image sensor, a lens module and a circuit board. The lens module is disposed at an object side of the image sensor and has a plurality of electrical connection points thereon. The circuit board includes a main body and a bent portion electrically connecting with the main body. The image sensor is mounted on the main body and received between the lens module and the main body. The bent portion extends from a side surface of the main body and a plurality of electrical connection points is formed on the bent portion corresponding to the electrical connection points of the lens module. The electrical connection points of the bent portion are configured for connecting with the electrical connection points of the lens module to supply power to the lens module.

Abstract: A hydrodynamic bearing (300) has a bearing surface adapted for receiving a shaft to rotate thereon. The bearing surface has a plurality of grooves (34) defined therein. The grooves for generating hydrodynamic pressure each has at least one interior surface (3421). The at least one interior surface has a sloping surface along a circumferential direction of the hydrodynamic bearing.

Abstract: A method for manufacturing a hydrodynamic bearing (30) includes the following steps. First, a substrate having a surface with multiple protrusions thereon is formed. The protrusions are adapted for forming grooves in a preform. The preform, when finally processed, becomes a shaft of the hydrodynamic bearing or a bearing of the hydrodynamic bearing. Second, a feedstock of binder and powder is pushed to the surface of the substrate to form the perform on the surface of the substrate. Third, the substrate is removed from the preform. Fourth, the preform is sintered. Fifth, the preform is precision machined to obtain the shaft or the bearing, as the case may be. In the shaft or bearing, the grooves are for generating hydrodynamic pressure.

Abstract: A heat pipe includes a cylinder-shaped casing (100) containing a working fluid therein and a capillary wick (200) arranged on an inner wall of the casing. The capillary wick encloses a vapor passage (300) in a center of the casing. The capillary wick includes a plurality of shaped foils stacked on the inner wall of the casing along a radial direction thereof. The foils are sintered to the inner wall of the casing and define a multi-channel structure for the working fluid to flow from a condensing section to an evaporating section of the heat pipe.

Abstract: A latching mechanism of a battery cover assembly (100) is provided. The battery cover assembly includes a battery cover (20) and a housing (10). The latching mechanism includes a limiting mechanism, a hinged mechanism, at least one latching portion (133), and at least one latching arm (28). The limiting mechanism is configured to prevent the battery cover from accidentally detaching from the housing. The hinged mechanism is configured to facilitate both rotation and sliding of the battery cover relative to the housing. Each latching portion is formed on the housing, and each latching arm is formed on the battery cover. The latching arm elastically engages with a respective latching portion in such manner that the battery cover is latched to the housing.

Abstract: A blind (10) for a projector includes a bracket (20) mounted to the projector, and a folded fin (30) fixed on the bracket and covering a hot air vent of the projector. The folded fin includes a plurality of parallel fins (32) and a plurality of upper and lower tabs (34, 36) interconnecting the fins. Each of the fins defines an angle of 135 degrees with a plane defined by the lower tabs. Furthermore, a projection of each of the fins on the plane defined by the lower tabs overlaps a part of a corresponding adjacent fin. Thus, the blind can prevent a light leakage from the projector, while allow a heated airflow to be expelled out of the projector simultaneously.

Abstract: A heat dissipation device includes a base (10), a plurality of fins (20), first and second heat pipes (30), (40), a fan holder (50) and a fan (60) secured to the fan holder. The first heat pipe includes a heat-receiving section (32) and two heat-discharging sections (34). The second heat pipe includes an evaporating portion (42) and two condensing portions (44). The condensing portions of the second heat pipe extend into the fins and are disposed adjacent to opposite ends of each of the fins. One heat-discharging section extends in the fins and is disposed between the condensing portions, thus allowing heat absorbed from the base to be evenly distributed throughout the fins by the heat-discharging sections and the condensing portions.

Abstract: A heat dissipation device includes a base for contacting an electronic device, a fin set thermally contacting the base, a first heat pipe and a second heat pipe connecting the base and the fin set. The fin set has a bottom larger than the base and an upper portion apart from the bottom thereof. The first heat pipe has a flat top face thermally contacting the bottom of the fin set, including a first transferring portion thermally engaging with the base and a second transferring portion extending from the first transferring portion and projecting beyond the base. The second heat pipe includes an evaporation portion thermally engaging with the base and a condensation portion extending from the evaporation portion and engaging with the upper portion of the fin set.