Sharp Kabushiki Kaisha Corporation

Yoshihide Fujioka

Toshihiro Ohba

Yoshiharu Kanatani

Shigeyuki Harada

Hisashi Uede

Hiroshi Kinoshita

Kazuo Shoji

Morihisa Sogabe

A thin-film EL display panel drive circuit capable of varying the drive voltage according to changes in the number of emitting picture elements.

Thin film EL display panel drive circuit

A thin film EL display device wherein an EL layer is interposed between scanning side electrodes and data side electrodes which are arranged to cross one another. A data side driver IC, including switching elements for charging and discharging, is connected to the data side electrodes, and switching circuits for applying modulation voltage are connected to a pull-up common line of the data side driver IC. The switching circuits are provided with switches for removing the charge stored in the thin film EL device after the thin film EL device has emitted light and a capacitor for storing the removed charge, whereby the charge stored in the capacitor can be reused in the next light emission for the purpose of reducing power consumption.

Driving circuit for thin film EL display device

Thin-film EL display panel drive circuit with voltage compensation

An electroluminescent (EL) display panel circuit comprises an EL display panel having four sides, a driver circuit for driving the EL display panel, the driver circuit comprising shift register circuits for selectively sending data in bi-directions, terminals of the EL display panel connected to the driver circuit, the terminals being led out from at least two sides of the EL display panel, and flexible substrates for supporting the driver circuit in such a manner that one of the flexible substrates corresponding to one of at least two of the terminals is symmetrical to the other of the flexible substrates corresponding to the opposing other of the at least two of the terminals.

Electroluminescent display panel assembly

Growing community of inventors

Nara, Japan

Yoshihide Fujioka