Mitsubishi Electric

About: Mitsubishi Electric is a company organization based out in Ratingen, Germany. It is known for research contribution in the topics: Signal & Voltage. The organization has 23024 authors who have published 27591 publications receiving 255671 citations. The organization is also known as: Mitsubishi Electric Corporation & Mitsubishi Denki K.K..

Capture of photoexcited carriers in a single quantum well with different confinement structures

Abstract: The authors report experimental and theoretical studies of photoexcited carrier trapping in a GaAs/Al/sub x/Ga/sub 1-x/As single quantum well with three different typical confinement layer structures: a separate-confinement heterostructure (SCH) and a graded SCH (GRIN-SCH), a linearly graded SCH (LGRIN-SCH), and a parabolically-graded SCH (PGRIN-SCH). The capture is studied by means of time-resolved luminescence with 600-fs resolution. Measurements, performed from 20 to 300 K, show an appreciably shorter trapping time in the GRIN-SCH (1 ps at 80 K to 8 ps at 300 K) than in the SCH (between 22 and 14 s in the same temperature range). Experimental results are fitted by a one-dimensional drift-diffusion model, and the mobility of holes is deduced from the calculations. A short but finite capture time at the edge of the well is demonstrated. >

Touch panel device and user interface device

Abstract: An analog touch panel device capable of utilizing a two-point touch on a touch panel as meaningful information input and a user interface device employing the analog touch panel device are provided. A decision is made as to whether two points are touched or not on a touch panel TP having resistive films which have electrode terminals at opposite end portions each and are superimposed top and bottom in such a manner that the electrode terminals become orthogonal, in which the top and bottom resistive films are brought into contact with each other by a push of a resistive film surface by touch input. The decision is made according to resistance values between the opposite terminals, and when a decision is made that the two points are touched, the distance between the two points touched is detected according to the resistance values between the opposite terminals.

Surface light source device and display device using the same

Abstract: A surface light source device according to the invention includes a housing having an opening portion on at least one face, an LED light source held by one face of the housing opposing the opening portion, and a light guiding plate arranged at a position so as to cover the opening portion and the LED light source, wherein the light guiding plate includes a recess provided at a position corresponding to the LED light source for storing a part of the LED light source, and light quantity adjusting means provided at a bottom part of the recess for adjusting light from the LED light source, and the light quantity adjusting means includes a reflection sheet having a reflection function and a transmission function in which a total light transmittance t satisfies t≧πr 2 cos θ/{(1−cos θ)(S−πr 2 )}, supposing that an average radius is defined as r, a distance from the LED light source is defined as H, a light-emitting area of the LED light source is defined as S, and a total light quantity is defined as L.