Abstract: Embodiments of this application disclose a noise cancellation apparatus and method. The noise cancellation apparatus includes a main control unit and a noise cancellation processing circuit. The main control unit determines a noise cancellation parameter based on a noise cancellation level index or a feature value for determining a matching degree between a headset and an ear canal of a user. The noise cancellation processing unit obtains an inverse phase noise of an ambient noise based on the noise cancellation parameter. After the inverse phase noise is mixed with a played downlink audio signal, the ambient noise can be canceled. In addition, because the noise cancellation parameter is determined from a preset noise cancellation parameter library based on the received or autonomously determined noise cancellation level index, instead of being uniformly configured, a noise cancellation level can be flexibly adjusted, thereby improving a noise cancellation effect and user experience.

Abstract: This application provides a semiconductor switch device and a preparation method thereof, and a solid-state phase shifter. The semiconductor switch device includes a second semiconductor layer, a first intrinsic layer, a first semiconductor layer, a second intrinsic layer, and a third semiconductor layer that are stacked in a sandwich structure. The first intrinsic layer is located between the second semiconductor layer and the first semiconductor layer, and the first intrinsic layer, the second semiconductor layer, and the first semiconductor layer form a first PIN diode. The second intrinsic layer is located between the third semiconductor layer and the first semiconductor layer, and the second intrinsic layer, the third semiconductor layer, and the first semiconductor layer form a second PIN diode. The first PIN diode and the second PIN diode are axisymmetrically disposed.

Abstract: This application provides a semiconductor switch device and a preparation method thereof, and a solid-state phase shifter. The semiconductor switch device includes a second semiconductor layer, a first intrinsic layer, a first semiconductor layer, a second intrinsic layer, and a third semiconductor layer that are stacked in a sandwich structure. The first intrinsic layer is located between the second semiconductor layer and the first semiconductor layer, and the first intrinsic layer, the second semiconductor layer, and the first semiconductor layer form a first PIN diode. The second intrinsic layer is located between the third semiconductor layer and the first semiconductor layer, and the second intrinsic layer, the third semiconductor layer, and the first semiconductor layer form a second PIN diode. The first PIN diode and the second PIN diode are axisymmetrically disposed.

Abstract: A scanning system and method are disclosed which may include a bar code scanner module incorporated within a housing; and a wireless network transceiver coupled to the bar code scanner module and operable to communicate with at least one other communication device, the bar code scanner and the transceiver forming a scanning device. The transceiver may communicate employing Zigbee network protocol.

Abstract: A scanning system and method are disclosed which may include a bar code scanner module incorporated within a housing; and a wireless network transceiver coupled to the bar code scanner module and operable to communicate with at least one other communication device, the bar code scanner and the transceiver forming a scanning device. The transceiver may communicate employing Zigbee network protocol.

Abstract: A portable scanning apparatus is disclosed, which may include a bar code scanner module incorporated within a housing; a portable computer memory assembled to the bar code scanner and incorporated within said housing, wherein the computer memory is operable to receive and store data obtained by the bar code scanner, and wherein the assembly of the bar code scanner and the portable computer memory within said housing forms a compact and portable package.

Abstract: An electronic display system for use, for example, in a retail outlet comprises a plurality of small display module commonly known as electronic shelf labels. The system also comprises a plurality of base stations for transmitting, to the display modules, representations of images to be displayed. This disclosure teaches an electronic display system wherein base stations are connected directly to the Internet. A single processor can transmit data, metadata and commands to base stations located in different retail outlets. Thus, a single processor can remotely manage display modules in a plurality of different retail outlets that are located at different geographical locations.