Display device

An electroluminescent device, comprising:

• a lower structure having an emission area and a peripheral area completely surrounding the emission area, the lower structure comprising an inorganic insulating film, an insulation film located on the inorganic insulating film, and an electroluminescent unit having a lower electrode located on the insulation film, an intermediate film located on the lower electrode, and an upper electrode located on the intermediate film;
• and
• a flexible encapsulation multilayer located on the emission area and the peripheral area, the flexible encapsulation multilayer comprising at least three layers,
• wherein:
• the peripheral area comprises an inorganic surface portion comprising only one or more inorganic materials, located outside the upper electrode in a plan view and having a first inorganic surface branch completely surrounding the emission area;
• the flexible encapsulation multilayer comprises a lower surface comprising only one or more inorganic materials;
• an entirety of the inorganic surface portion directly contacts the lower surface of the flexible encapsulation multilayer;
• the lower structure further comprises a lower encapsulation inorganic film horizontally expanding to vertically correspond to the emission area and the peripheral area and located substantially not higher than an upper surface of the lower structure;
• a portion located between a lower surface of the lower encapsulation inorganic film and the entirety of the inorganic surface portion does not comprise an organic material;
• the peripheral area comprises an organic surface portion completely surrounding the emission area in a plan view, and located outside the upper electrode in a plan view;
• the lower surface of the flexible encapsulation multilayer directly contacts the organic surface portion such that the organic surface portion is partially covered by the lower surface of the flexible encapsulation multilayer;
• the organic surface portion has an inner edge having at least a portion directly contacting the inorganic surface portion in a plan view;
• and
• the organic surface portion has an outer edge having a first portion directly contacting the inorganic surface portion in a plan view and a second portion which does not directly contact the inorganic surface portion in a plan view.

An electroluminescent device, comprising:

• a lower structure having an emission area and a peripheral area completely surrounding the emission area, the lower structure comprising an inorganic insulating film, an insulation film located on the inorganic insulating film, and an electroluminescent unit having a lower electrode located on the insulation film, an intermediate film located on the lower electrode, and an upper electrode located on the intermediate film;
• and
• a flexible encapsulation multilayer located on the emission area and the peripheral area, the flexible encapsulation multilayer comprising at least three layers,
• wherein:
• the peripheral area comprises an inorganic surface portion comprising only one or more inorganic materials, located outside the upper electrode in a plan view and having a first inorganic surface branch completely surrounding the emission area;
• the flexible encapsulation multilayer comprises a lower surface comprising only one or more inorganic materials;
• an entirety of the inorganic surface portion directly contacts the lower surface of the flexible encapsulation multilayer;
• the lower structure further comprises a lower encapsulation inorganic film horizontally expanding to vertically correspond to the emission area and the peripheral area and located substantially not higher than an upper surface of the lower structure;
• a portion located between a lower surface of the lower encapsulation inorganic film and the entirety of the inorganic surface portion does not comprise an organic material;
• the peripheral area comprises an alignment mark;
• and
• an upper surface of the alignment mark or a lateral surface of the alignment mark is included in the inorganic surface portion.

An electroluminescent device, comprising:

• a lower structure having an emission area and a peripheral area completely surrounding the emission area, the lower structure comprising an inorganic insulating film, an insulation film located on the inorganic insulating film, and an electroluminescent unit having a lower electrode located on the insulation film, an intermediate film located on the lower electrode, and an upper electrode located on the intermediate film;
• and
• a flexible encapsulation multilayer located on the emission area and the peripheral area, the flexible encapsulation multilayer comprising at least three layers,
• wherein:
• the peripheral area comprises an inorganic surface portion comprising only one or more inorganic materials, located outside the upper electrode in a plan view and having a first inorganic surface branch completely surrounding the emission area;
• the flexible encapsulation multilayer comprises a lower surface comprising only one or more inorganic materials;
• an entirety of the inorganic surface portion directly contacts the lower surface of the flexible encapsulation multilayer;
• the lower structure further comprises a lower encapsulation inorganic film horizontally expanding to vertically correspond to the emission area and the peripheral area and located substantially not higher than an upper surface of the lower structure;
• a portion located between a lower surface of the lower encapsulation inorganic film and the entirety of the inorganic surface portion does not comprise an organic material;
• the peripheral area comprises an inorganic structure having a height and comprising a lateral surface having a first part extending to be substantially perpendicular to the inorganic surface portion, a second part connected to the first part and extending along the inorganic surface portion, and a third part connected to the second part and extending to be substantially perpendicular to the inorganic surface portion;
• the first and third parts are connected to first and second ends of the second part, respectively;
• the first end is substantially opposite to the second end;
• the inorganic structure crosses the inorganic surface portion substantially along a direction from the first part to the third part;
• and
• the inorganic surface portion comprises at least a portion of the second part.

An electroluminescent device, comprising:

• a lower structure which has an emission area and a peripheral area surrounding the emission area, and which comprises an inorganic insulating film, an insulation film located on the inorganic insulating film, and an electroluminescent unit having a lower electrode disposed on the insulation film, an intermediate film disposed on the lower electrode, and an upper electrode disposed on the intermediate film, and
• a flexible encapsulation multilayer disposed on the emission area and the peripheral area, and including at least three layers,
• wherein the peripheral area includes an inorganic surface portion substantially surrounding the emission area, located outside the upper electrode at a planar view, and comprising only one or more inorganic materials,
• wherein the flexible encapsulation multilayer includes a bottom surface comprising only one or more inorganic materials,
• wherein an entire of the inorganic surface portion directly contacts the bottom surface of the flexible encapsulation multilayer,
• wherein the lower structure includes a lower encapsulation inorganic film horizontally expanding under a surface of the lower structure to vertically correspond to the emission area and the peripheral area, and a portion disposed between the lower encapsulation inorganic film and the entire of the inorganic surface portion comprises only one or more inorganic materials,
• wherein the inorganic surface portion includes a first region having a first average width and a second region having a second average width, and the first average width and the second average width are substantially different from each other,
• wherein the lower electrode is disposed over a top surface of the insulation film, and the entire of the inorganic surface portion is disposed relatively lower than the top surface of the insulation film,
• wherein the lower structure further comprises a bus wire extending on a top surface of the inorganic insulating film along a periphery of the emission area, and an auxiliary upper electrode which extends on a side surface for the insulation film and the top surface of the insulation film along the periphery of the emission area, has a bottom surface facing a top surface of the bus wire to electrically communicate with the top surface of the bus wire, and has a top surface facing a bottom surface of the upper electrode to electrically communicate with the bottom surface of the upper electrode, and
• wherein the inorganic surface portion includes at least two stepped surface portions each including a top surface portion of the inorganic insulating film, a side surface portion of the auxiliary upper electrode, and a top surface portion of the auxiliary upper electrode.