251results about How to "Not easy to short circuit" patented technology

One aspect of the present invention is a light-emitting element having a layer containing an aromatic hydrocarbon and a metal oxide between a pair of electrodes. There is no particular limitation on the kind of aromatic hydrocarbon; however, an aromatic hydrocarbon having a hole mobility of 1 x 10-6 cm2 / Vs or more is preferable. Examples of such aromatic hydrocarbons include 2-tert-butyl-9,10-bis(2-naphthyl)anthracene, anthracene, 9,10-diphenylanthracene, tetracene, rubrene, perylene, 2,5,8,11-tetra(tert-butyl)perylene and so on. As the metal oxide, a metal oxide exhibiting electron-accepting properties for aromatic hydrocarbons is preferable. As such metal oxides, for example, molybdenum oxide, vanadium oxide, ruthenium oxide, rhenium oxide and the like are given.

The invention provides a rotary conducting structure. The rotary conducting structure comprises an inner insulation sleeve and an outer insulation sleeve, the axes of the inner and outer insulation sleeves extend in the front and back direction, the inner insulation sleeve is arranged coaxial with the outer insulation sleeve, and at least one bearing is arranged in an annular space formed between the inner and outer insulation sleeves. Each bearing includes a circumferentially enclosed bearing outer ring, a circumferentially enclosed bearing inner ring and a conducting ball, wherein the bearing outer ring is fixedly assembled at the internal circumferential surface of the outer insulation sleeve, the bearing inner ring is fixedly assembled at the external circumferential surface of the inner insulation sleeve, and the conductive ball is connected between the bearing inner ring and the bearing outer ring. The bearing inner and outer rings of the rotary conducting structure are enclosed circumferentially and fixed to the inner insulation sleeve and the outer insulation sleeve which are arranged coaxially, the radial sizes of the different positions of the annular space formed between the bearing inner and outer rings are the same, the ball makes stable and unchanged contact with the bearing inner and outer rings when rotating circumferentially in the annular space in a circulated manner, and the rotary conducting performance is high.

A cold cathode field emission device comprises; a cathode electrode 11 formed on a supporting member 10, an insulating layer 12 formed on the supporting member 10 and the cathode electrode 11, a gate electrode 13 formed on the insulating layer 12, an opening portion 14A, 14B formed through the gate electrode 13 and the insulating layer 12, and an electron emitting portion 15 formed on the portion of the cathode electrode 11 positioned in the bottom portion of the opening portion 14B, and said electron emitting portion 15 comprises a matrix, 21 and carbon nanotube structures 20 embedded in the matrix 21 in a state where the top portion of each carbon nanotube structure is projected.