Abstract: An optical module includes an upper shell, a lower shell, a circuit board, and a light-emitting device. The circuit board includes a mounting hole running through a front surface and a back surface of the circuit board. The light-emitting device includes a base, a laser assembly, a translation prism, and an optical fiber coupler. The base is installed on the front surface and has an installation surface facing towards the front surface. The laser assembly and the translation prism are installed on the installation surface. The laser assembly passes through the mounting hole. The translation prism is configured to translate a laser beam located at the back side of the circuit board emitted by the laser assembly to the front side of the circuit board. The optical fiber coupler is configured to transmit the translated laser beam to outside of the optical module.

Abstract: Two OSFP transceivers' connectors' footprints are placed on the opposite sides of a PCB board. The two footprints are aligned in a special way and the connections among the high speed signals' pads of the two footprints are specially defined. Based on that, the high speed signals' pads of the two footprints are connected through PCB traces and vias. Two OSFP electrical connectors are soldered onto the two footprints. So the electrical high-speed signals coming from two OSFP transceivers are directly connected in the shortest way when the two transceivers are respectively plugged into the two OSFP connectors.

Abstract: Two QSFP-DD transceivers' footprints are placed on the opposite sides of a PCB board. The two footprints are aligned in a special way and the connections among the pads of the two footprints are also specially defined. Based on that, the pads of the two footprints are connected through PCB traces and VIA. Two QSFP-DD electrical connectors are soldered onto the two footprints. So the high-speed signals from two QSFP-DD transceivers are directly connected in the shortest way when the two transceivers are plugged into the two QSFP-DD connectors.

Abstract: An optical module includes a shell, a circuit board, a light-emitting device, a sensor assembly and a processor. The circuit board is disposed in the shell. The light-emitting device is disposed in the shell, and includes a non-hermetically sealed cover, a laser chip and a thermo electric cooler. The thermo electric cooler is disposed in the cover and is configured to adjust a temperature of the heat exchange surface of the thermo electric cooler connected to the laser chip. The sensor assembly is disposed on the circuit board and is configured to detect ambient data inside the optical module, the ambient data including at least ambient humidity. The processor is disposed on the circuit board, and is configured to receive the ambient data detected by and sent from the sensor assembly, and control the thermo electric cooler to adjust the temperature of the heat exchange surface of the thermo electric cooler to a target temperature according to the ambient data.

Abstract: A heating and ventilation fan for a bathroom comprises an ventilation fan frame, a scroll casing provided with fan blades and a motor, an air passage-switching plate, and a heater; characterized in that: an air leakage-preventing structure is provided between an air outlet of the scroll casing and the air passage. The advantage of the present invention is that a desired air amount can be ensured and a noise can be reduced while guaranteeing a gap required for smooth rotation of the air passage-switching plate.

Abstract: A heating and ventilation fan for a bathroom comprises an ventilation fan frame, a scroll casing provided with fan blades and a motor, an air passage-switching plate, and a heater; characterized in that: an air leakage-preventing structure is provided between an air outlet of the scroll casing and the air passage. The advantage of the present invention is that a desired air amount can be ensured and a noise can be reduced while guaranteeing a gap required for smooth rotation of the air passage-switching plate.

Abstract: There is described an opto-electronic Integrated Circuit Board (ICB) comprising an ICB substrate; a linear array of cells positioned on the ICB substrate, for optical connection to an array of optical fibers, each one of the cells comprising: a die bond pad and one of a Vertical Cavity Surface Emitting Laser (VCSEL) and a Photodetector; a number of ICB bond pads on the ICB substrate, the number of ICB bond pads corresponding at least to a number of cells in the linear array, wherein each successive ICB bond pad along the linear array is located on alternate sides of the linear array; and wirebonds each connecting, in a one-to-one relationship, each one of the ICB bond pads to a corresponding die bond pad of one of the cells of the linear array.

Abstract: An integrated energy metering system having an energy meter including a voltage ADC for sensing voltage, a current ADC for sensing current, a microcontroller; a first memory device for storing program data for the energy meter; and a plurality of circuit blocks; a voltage monitor for monitoring a primary power supply; a power supply switch circuit for selectively applying one of the primary and auxiliary power supplies to the energy meter; and a system controller responsive to the voltage monitor for operating the switch circuit to apply the auxiliary power supply when the primary power supply voltage decreases below a predetermined level and gating the power to a first class of circuit blocks in the energy meter and applying power continuously to a second class of circuit blocks.

Abstract: An integrated energy metering system having an energy meter including a voltage ADC for sensing voltage, a current ADC for sensing current, a microcontroller; a first memory device for storing program data for the energy meter; and a plurality of circuit blocks; a voltage monitor for monitoring a primary power supply; a power supply switch circuit for selectively applying one of the primary and auxiliary power supplies to the energy meter; and a system controller responsive to the voltage monitor for operating the switch circuit to apply the auxiliary power supply when the primary power supply voltage decreases below a predetermined level and gating the power to a first class of circuit blocks in the energy meter and applying power continuously to a second class of circuit blocks.