Sharp Kabushiki Kaisha Corporation

Sharp Corporation

Katsuyasu Deguchi

Akiyoshi Fujii

Takatoshi Mizoguchi

Takayuki Taminaga

Hiroyuki Katayama

Mitsuhiko Yoshikawa

Hiromi Nishino

Hiroshi Suzuki

Masato Kawanishi

Toshitaka Tamura

A thermal head for a thermal recording machine including an insulating substrate which is composed of a printed circuit board made of a heat resistant resin and covered with a copper film, a plurality of thermal resistors disposed on the insulating substrate in the direction corresponding to the scanning, discrete electrodes electrically connecting first ends of the thermal resistors to a control element, a common electrode electrically connecting the other ends of the thermal resistors together, a heat releasing layer formed of the copper film of the insulating substrate on the lower portions of the thermal resistors, and a thermal accumulating layer of a polyimide resin covering the heat releasing layer.

Thermal head for thermal recording machine

A thermal head including a substrate, a plurality of thermal resistance elements formed on the substrate corresponding to print dots, a driving device for applying pulse voltage to the thermal resistance elements corresponding to print data, a temperature sensor provided on the substrate for sensing the temperature of the substrate, and an analog controller provided on the substrate and receiving an output from the temperature sensor for controlling the pulse voltage, so as to unify the print characteristic of the thermal resistance elements.

Thermal head having integral analog drive compensation

A thermal printing head includes an insulating substrate formed of a heat resisting cloth impregnated with a heat resisting resin. A plurality of heating elements of an electrically resistive material are linearly disposed on the substrate. A shield layer is interposed between the heating elements and the substrate for preventing the substrate from exerting chemical influence on the heating elements. A plurality of conduction controlling devices mounted on the substrate is included for controlling electric conduction of the heating elements corresponding to print data. A common electrode is formed on the substrate for commonly connecting an end of each of the heating elements. A discrete electrode is formed on the substrate for connecting the other end of each of the heating elements to the conduction controlling device. Finally, metal layer is interposed between the heating elements and the electrodes for connecting both of them in an ohmic contact.

Thermal printing head

A thermal head including a substrate, a thermal element array including a plurality of thermal elements linearly disposed on the substrate, a plurality of driver ICs provided on the substrate and including a plurality of drive circuit elements for controlling the thermal elements through electric conduction in accordance with a print signal, two common electrode patterns provided on the substrate, a first wiring pattern provided on the substrate for connecting each one end of each adjacent pair of the thermal elements commonly to one of the drive circuit elements, second and third wiring patterns provided on the substrate for connecting the other ends of the thermal elements separately to two common electrodes, the plurality of driver ICs being disposed along the thermal element array, the two common electrodes being arranged on opposite sides of the thermal element array and output terminals of the driver ICs, one of the adjacent thermal elements being formed of a single thermal resistor while the other is formed of two thermal resistors.

Thermal head

Growing community of inventors

Nara, Japan

Katsuyasu Deguchi