Abstract: A detection device for vehicle ignition system includes a body with a first IC circuit board received therein which is electrically connected with a power source. A probe connected to the body and is electrically connected to a ground line and the first IC circuit board. The body has a connection hole, a power switch for activating the detection device, an activation switch, a first display unit and a second display unit. The ground line is connected with a metal part of a vehicle to form a loop. When the probe contacts the coil, the ignition voltage signal of the coil is detected and displayed on the first display unit, and the combustion time signal of the coil is detected and displayed on the second unit. By the two signals, the maintainers are acknowledged the operation condition of the ignition system of the vehicle.

Abstract: A vehicle ignition system detection device is cooperated with a diagnostic unit and includes a detection unit. The detection unit includes multiple ignition system output holes and multiple detection cables. Each of the detection cables has a plug end and a patch end. Each of the plug ends is inserted in the ignition system output hole corresponding thereto, and each of the patch ends is connected to the coil corresponding thereto. The electro-magnetic detection signals between the patch ends and the coils are sent to the display screen of the diagnostic unit so that the maintainers are acknowledged the conditions of the ignition system.

Abstract: A cart includes a first side board and a second side board. Each of the first and second side boards has first holes and second holes respectively defined in the upper and lower portions thereof A first rod unit and a second rod unit are respectively connected to the first holes and the second holes of the first and second side boards. At least two shelves are movably mounted on the first and second rod units between the first and second side boards. A first wheel unit and a second wheel unit are respectively connected to the second holes at the front side and the rear side of the body so as to assemble the cart. The diameter of the second wheel unit is larger than that of the first wheel unit. The cart is light and suitable to move on an uneven surface.

Abstract: A headphone ear cup includes a composite cushion and a cover wrapping around the composite cushion. The composite cushion has an annular body and an air-permeable portion arranged at the outer periphery of the annular body. The air-permeable portion is made of a porous material having a porosity higher than that of the annular body. Because the annular body made of the material having relatively high density can maintain the sound output performance of the earphones, and the air-permeable portion made of the porous material having relatively low density can provide better heat dissipation effect, the headphone ear cup has excellent air-permeable property and improved acoustic field effect.

Abstract: A lock is provided. The lock includes a fixing base, an elastic member disposed on the fixing base, a stopper disposed above the elastic member, a numbering plate disposed above the stopper, a rotating disc disposed above the numbering plate, and a buckle seat disposed on the rotating disc. At least a portion of the stopping part is able to pass through the numbering plate. The rotating disc caps outside the numbering plate, the stopper, and at least a portion of the fixing base.

Abstract: A headphone ear cup for mounting on a surface of a speaker unit of a headphone includes an annular cushion having a sound hole at a center thereof, and a composite cover having a ventilative layer and an air-tight layer. The composite cover wraps around the annular cushion and defines an inner-side portion, an outer-side portion and an ear-abutting portion. The ventilative and air-tight layers are respectively formed by the outer-side portion and a composite of the inner-side and ear-abutting portions or by a composite of the outer-side and ear-abutting portions and the inner-side portion. Therefore, the ventilative layer and the annular cushion form a good heat dissipation path to have excellent air-permeable property, and air-tight layer provides an improved acoustic field effect.

Abstract: A headphone ear cup for mounting on a surface of a speaker unit of a headphone includes an annular cushion having a sound hole at a center thereof, and a composite cover having a ventilative layer and an air-tight layer. The composite cover wraps around the annular cushion and defines an inner-side portion, an outer-side portion and an ear-abutting portion. The ventilative and air-tight layers are respectively formed by the outer-side portion and a composite of the inner-side and ear-abutting portions or by a composite of the outer-side and ear-abutting portions and the inner-side portion. Therefore, the ventilative layer and the annular cushion form a good heat dissipation path to have excellent air-permeable property, and air-tight layer provides an improved acoustic field effect.

Abstract: A headphone ear cup includes a composite cushion and a cover wrapping around the composite cushion. The composite cushion has an annular body and an air-permeable portion arranged at the outer periphery of the annular body. The air-permeable portion is made of a porous material having a porosity higher than that of the annular body. Because the annular body made of the material having relatively high density can maintain the sound output performance of the earphones, and the air-permeable portion made of the porous material having relatively low density can provide better heat dissipation effect, the headphone ear cup has excellent air-permeable property and improved acoustic field effect.

Abstract: An audio device for a headphone is formed of a main body and an audio unit. The main body is annular and includes a lateral side facing and surrounding its center to define an audio cavity. The main body includes an accommodation space internally and at least one sound outlet communicating with the accommodation space and the sound outlet. The audio device is mounted inside the accommodation space. In light of this structure, the audio device looks lightweight visually and is breathable to make the user feel comfortable while wearing the headphone.

Abstract: A charging device used in a handheld device comprises a main body, a coupling portion connected to an end of the main body and the coupling portion has a connector, and a battery unit connected to another end of the main body. When the charging device is in a first status, the battery unit and the connector are coupled together; when it is in a second status, the battery unit is detached from the connector so that the connector is electrically connected with the handheld device in order to have the handheld device charged.

Abstract: A dual usage HCG VCSEL detector is provided with a high contrast grating (HCG) reflector first reflector that has a two dimensional periodic structure. The two dimensional structure is a periodic structure that is a symmetric structure with periodic repeating. The symmetrical structure provides that polarization modes of light are undistinguishable. A second reflector is in an opposing relationship to the first reflector. A tunable optical cavity is between the first and second reflectors. An active region is positioned in the cavity between the first and second reflectors. The photodetector is polarization independent. An MQW light absorber is included converts light to electrons. A dual usage HCG VCSEL-detector includes a high contrast grating (HCG) reflector first reflector, and a second reflector in an opposing relationship to the first reflector. A tunable optical cavity is between the first and second reflectors. An active region is positioned in the cavity between the first and second reflectors.

Abstract: A photodetector is provided with a high contrast grating (HCG) reflector first reflector that has a two dimensional periodic structure. The two dimensional structure is a periodic structure that is a symmetric structure with periodic repeating. The symmetrical structure provides that polarization modes of light are undistinguishable. A second reflector is in an opposing relationship to the first reflector. A tunable optical cavity is between the first and second reflectors. An active region is positioned in the cavity between the first and second reflectors. The photodetector is polarization independent. An MQW light absorber is included converts light to electrons.

Abstract: An exterior pressure detection device for detecting fluid pressure in pipes includes a body in which a circuit board and a pressure detection unit are received. The pressure detection unit includes a board and a pressure detecting chip which is electrically connected to the circuit board. An L-shaped clamping bar has a connection section and a clamping section which is parallel to the board. A pipe is clamped between the board and the clamping section. When the volume of the fluid passing through the pipe and changes the diameter of the pipe, the board is moved to activate the pressure detecting chip which transfer the change of the diameter of the pipe into a signal which is sent to the exterior main controlling device via the signal output device of the circuit board.

Abstract: A Bluetooth device is provided, which comprises a body used for connecting with an earphone; a rotating member, rotating between a first position and a second position relative to the body, so as to control power on or off of the Bluetooth device.

Abstract: A semiconductor device including a first wafer assembly having a first substrate and a first oxide layer over the first substrate. The semiconductor device further includes a second wafer assembly having a second substrate and a second oxide layer over the second substrate. The first oxide layer and the second oxide layer are bonded together by van der Waals bonds or covalent bonds. A method of bonding a first wafer assembly and a second wafer assembly including forming a first oxide layer over a first substrate. The method further includes forming a second oxide layer over a second wafer assembly. The method further includes forming van der Waals bonds or covalent bonds between the first oxide layer and the second oxide layer.

Abstract: A wafer including a substrate, a dielectric layer over the substrate, and a conductive layer over the dielectric layer is disclosed. The substrate has a main portion. A periphery of the dielectric layer and the periphery of the main portion of the substrate are separated by a first distance. A periphery of the conductive layer and the periphery of the main portion of the substrate are separated by a second distance. The second distance ranges from about a value that is 0.5% of a diameter of the substrate less than the first distance to about a value that is 0.5% of the diameter greater than the first distance.

Abstract: A Bluetooth device is provided, which comprises a body used for connecting with an earphone; a rotating member, rotating between a first position and a second position relative to the body, so as to control power on or off of the Bluetooth device.

Abstract: An earphone device with a bass adjusting function is provided. The earphone device includes an accommodating portion and an extension segment. The accommodating portion has an inner chamber for accommodating a speaker. The extension segment which is hollow-shaped and has a first space and a second space therein, and the first space is in communication with the inner chamber of the accommodating portion, and when a portion of the extension segment is adjusted from a first position to a second position, the first space, the second space, and the inner chamber of the accommodating portion are in communication, so as to increase a volume of the back chamber of the speaker.

Abstract: A semiconductor device including a first wafer assembly having a first substrate and a first oxide layer over the first substrate. The semiconductor device further includes a second wafer assembly having a second substrate and a second oxide layer over the second substrate. The first oxide layer and the second oxide layer are bonded together by van der Waals bonds or covalent bonds. A method of bonding a first wafer assembly and a second wafer assembly including forming a first oxide layer over a first substrate. The method further includes forming a second oxide layer over a second wafer assembly. The method further includes forming van der Waals bonds or covalent bonds between the first oxide layer and the second oxide layer.

Abstract: An exterior pressure detection device for detecting fluid pressure in pipes includes a body in which a circuit board and a pressure detection unit are received. The pressure detection unit includes a board and a pressure detecting chip which is electrically connected to the circuit board. An L-shaped clamping bar has a connection section and a clamping section which is parallel to the board. A pipe is clamped between the board and the clamping section. When the volume of the fluid passing through the pipe and changes the diameter of the pipe, the board is moved to activate the pressure detecting chip which transfer the change of the diameter of the pipe into a signal which is sent to the exterior main controlling device via the signal output device of the circuit board.