1
Hiroshi Yaguma, Masato Kobayashi: Organic EL drive circuit and organic EL display device using the same organic EL drive circuit. Rohm, Mattingly Stanger Malur & Brundidge P C, April 7, 2009: US07515124 (104 worldwide citation)

An amplifier circuit for generating a predetermined constant voltage required for resetting organic EL elements or capacitors is provided and an operating current switching circuit switches the operating current of the amplifier circuit to an idling current in a display period and to a steady operat ...


2
Hiroshi Yaguma, Motoya Kumagai, Takashi Nagai, Sukenori Itou: Liquid crystal driving apparatus. Rohm, Fish & Richardson P C, March 3, 2015: US08970460 (1 worldwide citation)

A voltage amplifier circuit (300) comprises: an input voltage generating unit (302) that generates an input voltage (VL1) based on a set value (SL); an operational amplifier (303) that amplifies the input voltage (VL1) such that the input voltage (VL1) becomes equal to a feedback voltage (VL3), ther ...


3
Masanori Fujisawa, Shinichi Abe, Hiroshi Yaguma: Organic EL drive circuit and organic EL display device using the same organic EL drive circuit. Rohm, Mattingly & Malur P C, September 8, 2009: US07586469 (1 worldwide citation)

A current inputted from a first input terminal and a reference current generated by an internal reference current generator circuit, which are in phase, are inputted to a reference current selector circuit by which either the inputted current or the reference current is selected. The selected curren ...


4
Hiroshi Yaguma, Shinichi Abe, Masato Kobayashi: Organic EL drive circuit IC. Rohm, Mattingly & Malur PC, August 25, 2009: US07580013 (1 worldwide citation)

An organic EL drive circuit includes a reset voltage generator circuit for generating a predetermined constant voltage for constant voltage resetting, reset switches provided between an output of the reset voltage generator circuit and terminal pins of an organic EL display panel and ON/OFF controll ...


5
Hiroshi Yaguma, Shinichi Abe, Jun Maede, Akio Fujikawa: Organic EL element drive circuit and organic EL display device using the same drive circuit. Rohm, Mattingly Stanger Malur & Brundidge P C, January 22, 2008: US07321347 (1 worldwide citation)

An organic EL drive circuit comprises a timing signal generator circuit for generating a plurality of second timing control signals sequentially delayed from a first timing control signal, a reset pulse generator circuit for selecting one of the plurality of the second timing control signals accordi ...


6
Shinichi Abe, Hiroshi Yaguma: Reference current generating circuit, organic EL drive circuit and organic EL display device employing it. Rohm, Mattingly & Malur P C, November 10, 2009: US07615932 (1 worldwide citation)

An organic EL display device having an organic EL drive circuit has a reference current generation circuit that switches the column line drive in response to changing of the dot arrangement of R, G and B through changeover switch circuits. Three D/A converter blocks constituted by a plurality of swi ...


7
Hiroshi Yaguma, Hiromitsu Nakaoka: Power supply apparatus, liquid crystal driving apparatus and display apparatus. Rohm, Fish & Richardson P C, February 5, 2013: US08368679

A power supply apparatus of the present invention comprises: a constant voltage generation section (first DAC (21), second DAC (22), resistor (R2), resistor (R3)) that generates a positive constant voltage (Va); a pulse voltage generation section (pulse oscillator (23), amplifier (24)) that generate ...


8
Hiroshi Yaguma: Organic EL drive circuit and organic EL display device using the same organic EL drive circuit. Rohm, Mattingly & Malur P C, August 4, 2009: US07570234

A first input terminal and a second input terminal of an organic EL drive circuit IC are arranged on both sides of the organic EL drive circuit IC, which are contiguous to sides of a plurality of IC's having identical circuit constructions to the organic EL drive circuit IC and arranged contiguously ...


9
Hiroshi Yaguma, Masanori Fujisawa, Shinichi Abe: Reference current generator circuit of organic EL drive circuit, organic EL drive circuit and organic EL display device. Rohm, Mattingly Stanger Malur & Brundidge PC, May 13, 2008: US07372439

A first current mirror circuit including an input side transistor, an output transistor and passive elements respectively connected in series with said input side transistor and said output side transistor, temperature coefficients of said passive elements being opposite in characteristics and a sec ...


10
Hiroshi Yaguma, Shinichi Abe, Jun Maede, Akio Fujikawa: Organic EL element drive circuit and organic EL display device using the same drive circuit. Mattingly Stanger & Malur PC, October 21, 2004: US20040207580-A1

An organic EL drive circuit comprises a timing signal generator circuit for generating a plurality of second timing control signals sequentially delayed from a first timing control signal, a reset pulse generator circuit for selecting one of the plurality of the second timing control signals accordi ...