Japan Display Inc.

Magnolia White Corporation

Takahiro Ushikubo

Norihisa Maeda

Daisuke Nemoto

A display device includes a first pixel electrode, a second pixel electrode, an insulating layer including a first opening part exposing a part of an upper surface of the first pixel electrode, and a second opening part exposing a part of an upper surface of the second pixel electrode, a first common layer arranged above the first pixel electrode, the second pixel electrode and the insulating layer, a first light-emitting layer a second light-emitting layer arranged above the first common layer; an opposite electrode arranged above the first light-emitting layer and the second light-emitting layer, a carrier absorption layer arranged above the insulating layer, the carrier absorption layer being arranged between the first common layer and the second light-emitting layer, and a light emission start voltage of the second light-emitting layer is lower than a light emission start voltage of the first light-emitting layer.

Display device

A display device incudes a first pixel electrode, a second pixel electrode, an insulating layer covering the first pixel electrode and the second pixel electrode, the insulating layer including a first opening part and a second opening part, a first light-emitting layer, a second light-emitting layer, a counter electrode arranged above the first light-emitting layer and the second light-emitting layer, wherein a light emission start voltage of the second light-emitting layer is lower than a light emission start voltage of the first light-emitting layer, the second light-emitting layer includes a first area arranged at a first end portion adjacent to the first light-emitting layer, the first area having a first dopant concentration, and a second area arranged at a second end portion of the second light-emitting layer opposing the first end portion, the second area having a second dopant concentration higher than the first dopant concentration.

A display device may include a plurality of pixel electrodes arranged in a matrix along a first direction and a second direction perpendicular to each other. A plurality of light-emitting layers overlap with the respective plurality of pixel electrodes. A plurality of carrier generation layers are separated from one another. Each of the plurality of carrier generation layers continuously overlap with two of the plurality of light-emitting layers. The two are next to each other in a direction oblique to both the first direction and the second direction. A common electrode is opposed to the plurality of pixel electrodes.

Display device including carrier generation layers

A display device includes a display region arranged above a substrate, a first light emitting element emitting light of a first color, a second light emitting element emitting light of a second color, and a third light emitting element emitting light of a third color arranged in the display region, and a first optical path length adjustment film, a second optical path length adjustment film, and a third optical path length adjustment film in the display region.

Display device for suppressing light emission in adjacent pixel due to current leakage

Manufacturing method of the display device

Display device and manufacturing method of the same

Provided is a display device having a first pixel and a second pixel adjacent to the first pixel. The first pixel includes a first pixel electrode, a first EL layer over the first pixel electrode, and a second electrode over the first EL layer. The second pixel includes a second pixel electrode, a second EL layer over the second pixel electrode, and the second electrode over the second EL layer. The display device further possesses a first cap layer over the second electrode, a second cap layer over the first cap layer and overlapping with the first EL layer, and a third cap layer covering the second cap layer, overlapping with the first EL layer and the second EL layer, and in contact with the first cap layer in a region overlapping with the second EL layer.

Display device with cap layer

At the time of removing a flexible organic electroluminescence display device from a support substrate, delamination is prevented from occurring at a laminate structure of an OLED. The organic electroluminescence display device includes a flexible base material, a plurality of organic electroluminescence elements, each comprising a pixel electrode, a reflective layer that is disposed between the base material and the pixel electrode and reflects light, a semitransparent counter electrode that is disposed on a light-emitting surface side with respect to the pixel electrode, and an organic electroluminescence function layer that is a lamination including an organic light-emitting layer and disposed between the pixel electrode and the counter electrode, a transparent electrode laminated on the counter electrode, an organic film laminated on the transparent electrode, and a gapgenerated at a part of an interface between the transparent electrodeand the organic film

Organic electroluminescence display device

A reflecting layer is provided for each of a white pixel PW and a plurality of chromatic color pixels PR, PG and PB. A semitransparent reflecting layer is provided for each of the white pixel PW and the plurality of chromatic color pixels PR, PG and PB. The distance between the reflecting layer and the semitransparent reflecting layer in the white pixel PW is larger than the largest distance among distances between the reflecting layer and the semitransparent reflecting layer in the chromatic color pixels PR, PG, PB. Such display device can suppress increase in manufacturing cost and obtain both merits of optical micro-cavity structure and of the white pixel.

Display device having varying distances between reflecting layers

The reflecting layer is formed on a white pixel PW and chromatic color pixels PR, PG, and PB. The semitransparent reflecting layer is formed on the white pixel PW and the chromatic color pixels PR, PG, and PB. The semitransparent reflecting layer and the intermediate layer in the white pixel PW constitute the light scattering structure. According to this display device, it is possible to obtain an advantage of a micro-cavity structure and an advantage of the white pixel while suppressing an increase in manufacturing cost.

Growing community of inventors

Tokyo, Japan

Takahiro Ushikubo