We present a new type of image display device that could be used as, for instance, over-sized rewritable color posters by using a simple MEMS fabrication technique. The mechanism of making colors is based upon the optical interference of the Fabry-Perot interferometer. A thin PEN (polyethylene naphthalate) film with metal half-mirror was laminated over a glass substrate with an optical cavity, and the electrostatic deformation of the film controlled the color of the transmitting light. Color pixels of three primary colors (red, green and blue) were successfully demonstrated with driving voltage ranging from 80 to 120Vdc.
This letter proposes a new differential power comparison (DPC) method, which accurately estimates the occurrence timing of shadowing at a mobile station (MS) by comparing the differential received power. In a road-to-vehicle TCP/IP communication system, the shadowing causes a lot of packets losses. They result in an extreme low throughput at an MS because packet retransmission increases in TCP layer. Though the technique of Freeze-TCP has proposed to overcome this problem, it must require an accurate estimation of shadowing with round trip time (RTT) in a road-to-vehicle communication (RVC) network. Computer simulations show that DPC method with 3 diversity antennas can estimate the occurrence timing of shadowing in high accuracy.
We describe a 5km-10Gb/s transmission at 850nm using a single-mode photonic crystal fiber (PCF), a vertical cavity surface emitting laser (VCSEL), and a Si-avalanche photodiode (APD).The fabricated PCF has an endlessly single-mode property. The transmission loss and dispersion of the fabricated PCF were 5.2dB/km and -62.8ps/nm/km, respectively. We also fabricate erbium-doped fluoride fiber amplifier (EDFFA), which operates at 850nm and report the gain characteristics of EDFFA. 10Gb/s NRZ signals were successfully transmitted over 5km.
The configuration that can work in mixed mode may be useful from IC realization viewpoint and application adaptability. This paper proposes a generalized mixed mode universal filter configuration that may be used in all possible modes i.e. voltage mode, current mode, trans-impedance mode and trans-admittance mode. The architecture uses minimum number of active and passive components reported till date and can realize all generic filter functions: low pass, band pass, high pass, notch and all pass. PSPICE simulation results agree well with experimental values.