Panasonic Corporation

Joled Inc.

Panasonic Liquid Crystal Display Co., Ltd.

Jdi Design and Development G. K.

Shinya Ono

Kouhei Ebisuno

Masafumi Matsui

Seiji Nishiyama

Hitoshi Tsuge

Takashi Osako

Arinobu Kanegae

Toshiyuki Kato

Yasuo Segawa

Tetsurou Nakamura

Rie Odawara

Hiroshi Hayashi

Hidehiro Yoshida

Yosuke Izawa

Shigeo Homura

Eiichi Sato

Shinya Tsuchida

Keisei Yamamuro

Mika Nakamura

Genshirou Kawachi

Kiyotaka Mori

Tetsuro Kondoh

Kohei Ebisuno

A luminescent display device includes a substrate and a thin-film transistor above the substrate. The thin-film transistor includes a semiconductor layer, a gate insulating film on the semiconductor layer, a gate electrode on the gate insulating film, a source electrode, and a drain electrode. The luminescent display device further includes an interlayer insulating film on the gate electrode, a first capacitor electrode on the interlayer insulating film in a region above the gate electrode, and a luminescent element configured to be driven by a driver to produce luminescence. The driver includes the thin-film transistor, and the first capacitor electrode and the gate electrode constitute a capacitor.

Luminescent display device

A method for driving a display device includes stopping a display operation of a display based on a presence or absence of a signal indicating an off operation of a main power switch of the display. The method further includes applying a recovery voltage across a gate and source of a driving transistor in the display based on a threshold voltage shift of the driving transistor. The threshold voltage shift is determined during a stopped state of the display operation of the display. The stopped state of the display operation of the display occurs prior to starting the display operation of the display.

Display device and method for driving display device

A display device includes: a display unit in which light-emitting pixels are disposed in rows and columns; and a control circuit controlling the display unit. The light-emitting pixels each include: a light-emitting element (organic EL element); and a drive transistor which supplies the light-emitting element with a current causing the light-emitting element to emit light, and the control circuit, when display by the display unit is stopped, calculates an amount of shift of a threshold voltage of the drive transistor at a time when a stopped state of the display unit is started, and determines on the basis of the amount of shift, at least one of (i) a recovery voltage which reduces the amount of shift by being applied across a gate and source of the drive transistor while the display by the display unit is stopped, and (ii) an application period during which the recovery voltage is applied.

A method for driving a display device including a plurality of pixels arranged in rows and columns, each of the pixels including an organic EL device that emits light in accordance with supplied current, a driving transistor that supplies current to the organic EL device, and a storage capacitor connected between the gate of driving transistor and a source or drain thereof, includes causing the organic EL device to emit light by supplying current to the organic EL device; resetting charge of at least one of the storage capacitor and a parasitic capacitance of the organic EL device; and applying a reverse bias voltage between the gate and source of the driving transistor. The resetting is performed between the light emission and the reverse-bias application.

Display device and method for driving same

A display device includes a pixel circuit that includes a thin-film transistor. The thin-film transistor includes a gate electrode, a semiconductor layer formed above the gate electrode, a gate insulating layer formed between the gate electrode and the semiconductor layer, a channel protective layer formed on the semiconductor layer, and a source electrode and a drain electrode that are formed above the channel protective layer and electrically connected to the semiconductor layer. The source electrode and the drain electrode are formed in different layers.

Display device and thin-film transistors substrate

Provided is a method for driving a display device including: a display unit having a sub-pixel having a first light emitting element (organic EL element) and a first driving transistor for supplying a first electric current corresponding to a first gray level signal, and a sub-pixel having a second light emitting element (organic EL element) and a second driving transistor for supplying a second electric current corresponding to a second gray level signal; and a power supply unit configured to apply a power supply voltage to each sub-pixel via an electric current path that is common to the sub-pixel and the sub-pixel. The driving method includes correcting the first gray level signal based on the first gray level signal and the second gray level signal so as to compensate for a reduction in the first electric current caused by a voltage drop that occurs in the electric current path.

A display panel including: a substrate; a plurality of first connecting wires in a first portion of the substrate and connected to a first flexible printed circuit board; a plurality of second connecting wires in a second portion of the substrate and connected to a second flexible printed circuit board, the second portion being adjacent to the first portion; first and second test pads provided between the first and second portions of the substrate, the first test pad being connected to an endmost first connecting wire adjacent to the second portion, the second test pad being connected to an endmost second connecting wire adjacent to the first portion; and an electrical circuit in which the endmost first and second connecting wires are included in different power supply nodes.

Display panel, method for producing display panel, and flexible printed circuit board

A method for driving a display device that includes a display unit and is driven by a sequence of row-by-row sequential scanning that includes a vertical blanking period, the display unit having pixels arranged in rows and columns, each pixel including an anode formed on a drive circuit layer, an organic light emitting layer formed above the anode and including a light emitting substance, and a transparent cathode formed above the organic light emitting layer, the method includes initializing a circuit element, writing a signal voltage to a capacitive element, inserting a black display to display the black display during a period determined based on a resistance value of the transparent cathode, and causing the organic EL element to emit light.

A display device includes: a display unit in which a plurality of pixels are arranged; and a power supply unit configured to feed a power supply voltage to the pixels through a power feeding line disposed on an outer periphery of the display unit. The pixels each include: an anode formed on a drive circuit layer; an auxiliary wire formed on the drive circuit layer to be spaced apart from the anode; an organic light emitting layer and an electron transport layer that are formed above the anode; and a transparent cathode formed above the electron transport layer. The electron transport layer and the transparent cathode extend from above the anode to above the auxiliary wire. The electron transport layer has a resistance value Rthat satisfies the following relationship: R&#x2264;(R&#x2212;R)&#xd7;M&#xd7;(M+1)/2.

Display device

By a drive method, for each of a plurality of display pixels each including an EL element, a capacitor, a drive transistor, an enable switch, and a switch, a period Tis started by switching only the enable switch to an electrically conductive state before a period Tin which the drive transistor is initialized, and the period Tfollowing the period Tis started by switching the switch to an electrically conductive state. The period Tis longer than a period Tin which a threshold voltage of the drive transistor is compensated.

Drive method and display device

A video display device includes a video obtaining unit that obtains a video represented in an input video format for displaying, at a predetermined frame frequency, frames each including an effective pixel region having n rows and m columns, pcolumns of a horizontal blanking period, and qrows of a vertical blanking period; a video format conversion unit that converts a format of the video to an output video format for displaying, at the predetermined frame frequency, frames each including the effective pixel region having n rows and m columns, pcolumns of the horizontal blanking period, and qrows of the vertical blanking period, where qis less than q; and a display driver unit that displays the video row by row in a display unit at a horizontal scanning frequency in the output video format.

Video display device, video display method, and program

An image display apparatus includes: a first pixel circuit including a driving transistor that drives a light emitting element and includes a gate electrode on a substrate, a semiconductor layer and a pair of source-drain electrodes; a second pixel circuit disposed adjacent to the first pixel circuit; a second pixel electrode that is formed above the second pixel circuit and is electrically connected to one of the pair of source-drain electrodes of the driving transistor of the first pixel circuit; and a top metal electrode that is electrically connected to one of the pair of source-drain electrodes and is formed to cover at least an entire channel region of the semiconductor layer from above.

Image display apparatus

A display device includes a display unit in which a plurality of pixel circuits are disposed, each of the pixel circuits includes: a first switching element; a second switching element; and a control line which is connected to a gate electrode of the first switching element, and transmits a first control signal which controls switching ON and OFF of the first switching element, and the display device comprises: a first capacitive electrode that is part of the control line; and a second capacitive electrode which is opposite to the first capacitive electrode and is connected to a gate electrode of the second switching element, wherein a first capacitor is formed between the first capacitive electrode and the second capacitive electrode.

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Osaka, Japan

Shinya Ono