Hitachi, Ltd.

Japanese National Railways

Nec Corporation

Ken Itoh

Akira Horie

Eiichi Toyota

Seiichi Yasumoto

Takashi Tsuboi

Isao Yasuda

Syuuji Saitou

Toshiaki Hirano

Kazuhiko Kobayashi

Takayuki Matui

Shigeyuki Fukada

Koichi Tokura

A protection film for protecting a dielectric layer of an AC type PDP is formed such that impurity metal ion densities of the protection film of the PDP, which is aged, become 400 ppm or less, respectively, and the protection film contains three or more hydrogen atoms assuming that the total number of atoms of the protection film is 100.

Plasma display panel and fabrication method of the same

In order to reduce an induction problem, which might otherwise be caused by a higher-harmonic current leaking to the outside of an inverter device, with a simple construction, an inverter device casing and a heat receiving plate mounted thereon are insulated from each other, and the heat receiving plate and a filter capacitor in the power supply circuit are connected through a predetermined inductance. Since the higher harmonics current is bypassed to the filter capacitor through the resonance filter which is formed by of the electrostatic capacity in a switching element and the inductance, the induction problem can be reduced by simple construction.

Power converting device for reducing an induction problem

A channel control system for a scattered loop type information transmission channel has posts that are linked in a single loop and are served both ways by the same loop. Each post consists of an A-system working in one direction and a similar B-system working in the opposite direction. A mode switch circuit switches between a relay mode for relaying the signal and a terminal mode for separating the A and B systems and returning the signal. Each system has a detection circuit for detecting a channel carrier signal OFF and a carrier ON-OFF signal transmission circuit and a monitor circuit for approach and circulation of the channel code. The mode switch circuit of a post which has detected a channel carrier signal OFF switches to the terminal mode and returns a carrier ON-OFF signal, while a post which has detected a carrier ON-OFF signal switches to the terminal mode and continues to issue a second carrier ON-OFF signal. A portion of the loop which contains a source of the channel carrier signal OFF is cut off from the rest of the loop containing no such source and when the monitor circuit of a post in the terminal mode confirms that the channel code has been circulated to both sides of the loop which has been cut off, its mode switch circuit switches the post to the relay mode and merges itself into the loop when the channel carrier signal OFF has vanished.

Channel control system for loop type signal transmission channel

A signal checking system for use in a hardware system having a converter for converting coded input signals consisting of a plurality of bits into corresponding individual signals, wherein undesirable selection of an erroneous output and multiple outputs by the converter is detected by means adapted for checking the relation between the input to the converter and the output of a first coder connected to the converter and checking the complementary relation between the output of the first coder and the output of a second coder connected to the converter.

Signal checking system

Growing community of inventors

Tokyo, Japan

Ken Itoh