Sharp Kabushiki Kaisha Corporation

National Science and Technology

Takashi Oka

Yasushi Ogimoto

Hiroshi Morimoto

Yasunari Hosoi

Shigeo Ohnishi

Naoto Nagaosa

Yoshinori Tokura

A variable resistance element comprises a variable resistor of strongly-correlated material sandwiched between two metal electrodes, and the electric resistance between the metal electrodes varies when a voltage pulse is applied between the metal electrodes. Such a switching operation as the ratio of electric resistance between low and high resistance states is high can be attained by designing the metal electrodes and variable resistor appropriately based on a definite switching operation principle. Material and composition of the first electrode and variable resistor are set such that metal insulator transition takes place on the interface of the first electrode in any one of two metal electrodes and the variable resistor by applying a voltage pulse. Two-phase coexisting phase of metal and insulator phases can be formed in the vicinity of the interface between the variable resistor and first electrode by the work function difference between the first electrode and variable resistor.

Variable resistor element and its manufacturing method

An item selection signal input system includes a sheet file carrying a plurality of item lists, each of the item lists being provided with item indicia for marking switches formed on a keyboard panel. The sheet file is removably wound around a bidirectionally rotatable drum through the use of a claw provided on the bidirectionally rotatable drum and an engaging member secured to one end of the sheet file. When different key markings are required, the sheet file is demounted from the bidirectionally rotatable drum, and a new sheet file is mounted on the bidirectionally rotatable drum through the use of the claw and the engaging member.

Sheet file mounting/demounting mechanism in an item selection signal

An item selection signal input system comprising a keyboard panel including a plurality of matrix aligned, transparent touch sensitive switches. An item list setting mechanism is provided for placing a desired item list below the keyboard panel in order to mark each of the touch sensitive switches. The item list setting mechanism comprises an item list carrying drum to which one end of a plurality of item lists are fixed. The desired item list is selected while the item list carrying drum is driven to rotate.

Item list setting mechanism in an item selection signal input system

Growing community of inventors

Yamatokoriyama, Japan

Takashi Oka