Abstract:
A flat light source apparatus has a light source board which comprises unit boards, each unit board having a printed circuit board and a light source formed on the printed circuit board, wherein the unit boards are arranged adjacent to each other at least in one direction, and any pair of the unit boards adjacent to each other is integrated by a connecting portion provided therebetween. The apparatus also has a main wire which extends along a plane of the light source board, wherein the main wire extends between adjacent unit boards via the connecting portion such that all of the unit boards are electrically connected to each other by the main wire. The apparatus further has a branch wire for supplying electric power to the light source, the branch wire being provided in each unit board and branching from the main wire in each unit board.
Abstract:
A network communication card is provided for facilitating ultra high frequency (UHF) radio communication between a terminal and a base station, the network communication card being in communication with an antenna and comprising a double-sided multilayer printed circuit board (PCB). The PCB comprises a digital interface, a receiver and a transmitter. The digital interface provides communication between the PCB and the terminal. The receiver receives incoming radio signals from the base station and processes the received signals for communication to the terminal via the digital interface. The transmitter transmits outgoing radio signals from the terminal via the digital interface to the base station and includes the following components. A digital synthesizer provides a highly accurate modulated carrier signal. An upconversion circuit increases the frequency of the carrier signal. A filter filters spurious content from the carrier signal. A phase locked loop (PLL) comprising a synthesizer and a voltage controlled oscillator (VCO) generates a transmission signal from the filtered carrier signal. A transmission circuit transmits the transmission signal via the antenna.
Abstract:
A layout configuration of a flat display device includes a display panel, a one layer printed circuit board and a backlight unit. The display panel has a plurality of pixel regions. The single printed circuit board has one side mounted thereon a control circuit, a driving circuit, a power unit and an inverter. The control circuit, the driving circuit, the power unit and the inverter are electrically connected to each other via electrical traces of the printed circuit board. The backlight unit is used for emitting light to the display panel.
Abstract:
A microwave circuit comprises a printed circuit board (PCB) on which is fabricated a circuit including passive components such as filters (40) formed by printed conductive patterns. In order to enhance the performance of the circuit, selected components such as filters are made with a greater precision on substrate material (41), such as alumina, having a higher dielectric constant than that of the printed circuit board material. The finished component is mounted on the printed circuit board and the conductive pattern is connected by wire bonds (48, 50) to microstrip tracks (51) of the printed circuit board.
Abstract:
A high frequency module device having a high frequency circuit block unit including a passive device. A plural number of unit wiring layers, each formed by an insulating layer, having a passive device unit in its portion, and by a pattern wiring, are layered on a dummy substrate, and are released from the dummy substrate to form the high frequency circuit block unit (2), which is mounted on a motherboard (3). The major surfaces of the respective unit wiring layers are planarized. The passive device unit and the pattern wiring, formed on the major surface of each unit wiring layer in the high frequency circuit block unit (2), can be formed with high accuracy to improve high frequency characteristics. The high frequency circuit block unit (2) is not in need of a base substrate, thus achieves reduction in size and cost.
Abstract:
Transmission of electric and optical signal, realization of high-speed and high capacity of transmission of information signals. A base substrate section having an interconnect layer formed on an insulating substrate by a printed circuit process; a micro interconnect circuit section having a micro electrical interconnect layer which is finer than the interconnect layer of the base substrate section, formed on an insulating resin layer by a semiconductor process; and an optical interconnect circuit section adapted to transfer and/or receive an optical signal and provided with an optical wave-guide having an input section and an output section of a optical signal at opposite ends thereof; and at least a pair of optical elements composed of a light emitting device with a light emitting section thereof facing the input section and a photo detecting device with a photo detecting section thereof facing the output section are provided and the micro interconnect circuit section and the optical interconnect circuit section are mounted on the base substrate section.
Abstract:
The present invention provides systems and methods for attenuating the effect of ambient light on optical sensors and for measuring and compensating quantitatively for the ambient light.
Abstract:
The invention relates to a memory module having a printed circuit board; having one or more memory chips which are arranged in a first region of the printed circuit board and are contact-connected by the printed circuit board; having a buffer chip for driving the memory chips and for communicating with a system that is external to the memory module, the buffer chip being arranged in a second region of the printed circuit board and being contact-connected by the printed circuit board; wherein the first and second regions of the printed circuit board are essentially thermally decoupled from one another.
Abstract:
A layout for simultaneously sub-accessible memory modules is disclosed. In one embodiment, a memory module includes a printed circuit board having a plurality of sectors, each sector being electrically isolated from the other sectors and having a multi-layer structure. At least one memory device is attached to each sector, the memory devices being organized into a plurality of memory ranks. A driver is attached to the printed circuit board and is operatively coupled to the memory ranks. The driver is adapted to be coupled to a memory interface of the computer system. Because the sectors are electrically-isolated from adjacent sectors, the memory ranks are either individually or simultaneously, or both individually and simultaneously accessible by the driver so that one or more memory devices on a particular sector may be accessed at one time. In an alternate embodiment, the printed circuit board includes a driver sector electrically isolated from the other sectors and having a multi-layer structure, the driver being attached to the driver sector.
Abstract:
An image forming apparatus including a conveying unit for conveying a document, on which an image is recorded, along a predetermined conveying path, a scan unit that is disposed on the conveying path of the document for scanning the image recorded on the document, and a control unit for controlling the conveying unit and the scan unit. The control unit includes a main circuit board that controls operations of the scan unit and converts the scanned image into digital image information, and a sub-circuit board that controls operations of the conveying unit, and wherein the sub-circuit board includes a high voltage signal area on which a high voltage signal is routed, and a low voltage signal area on which a low voltage signal is routed.