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Patent Application Titled "Organic Light-Emitting Display Apparatus and Method of Manufacturing the Same" Published Online

July 23, 2014



By a News Reporter-Staff News Editor at Electronics Newsweekly -- According to news reporting originating from Washington, D.C., by VerticalNews journalists, a patent application by the inventors Lee, Jae-Man (Yongin-City, KR); Yoo, Seung-Joon (Yongin-City, KR); Choi, Hyun-Soo (Yongin-City, KR); Shin, Jae-Wook (Yongin-City, KR), filed on March 20, 2013, was made available online on July 10, 2014.

The assignee for this patent application is Samsung Display Co., Ltd.

Reporters obtained the following quote from the background information supplied by the inventors: "The present disclosure relates to an organic light-emitting display apparatus and a method of manufacturing the same, and more particularly, to an organic light-emitting display apparatus that employs a sealing unit having an enhanced bonding intensity and a method of manufacturing the same.

"Generally, an organic light-emitting display apparatus is a self-emission display which is formed by using an organic light-emitting diode (OLED) which includes a hole-injected electrode, an electron-injected electrode, and an organic light-emitting display formed therebetween. The organic light-emitting display apparatus emits light when an exciton, generated when a hole injected from the hole-injected electrode and an electron injected from the electron-injected electrode are combined, drops from an excitation state to a ground state.

"Since the organic light-emitting display apparatus which is a self-emission display does not need an additional power source, it may be driven with a low voltage, and may be formed of a light film. Additionally, the organic light-emitting display apparatus provides high-quality characteristics such as a wide viewing angle, high contrast, and a rapid response. Thus, an organic light-emitting display apparatus receives consideration as a next-generation display apparatus."

In addition to obtaining background information on this patent application, VerticalNews editors also obtained the inventors' summary information for this patent application: "The present disclosure provides an organic light-emitting display apparatus that employs a sealing unit having an enhanced bonding intensity and a method of manufacturing the same.

"According to an aspect of the present disclosure, there is provided an organic light-emitting display apparatus, including: a display substrate in which a display unit including an organic light-emitting diode (OLED) and a thin-film transistor (TFT) is formed; a sealing substrate configured to face the substrate; a sealing material for bonding the display substrate and the sealing substrate and surrounding a circumference of the display unit; and a bonding layer including a plurality of through holes between the sealing material and the display substrate, wherein the plurality of through holes includes at least one of partition wall therein.

"According to an aspect of the present disclosure, there is provided an organic light-emitting display apparatus, including: a display substrate; a sealing substrate configured to face the display substrate; a display unit located between the display substrate and sealing substrate, wherein said display unit comprises an organic light-emitting diode (OLED) and a thin-film transistor (TFT); a sealing material for bonding the display substrate and the sealing substrate and surrounding a circumference of the display unit; and a bonding layer comprising a plurality of through holes configured to allow contact between the sealing material and the display substrate, wherein each through holes comprises at least one partition wall therein.

"In some embodiments, the bonding layer may include a light absorption layer.

"In some embodiments, the light absorption layer may include a conductive material.

"In some embodiments, the sealing material may be frit.

"In some embodiments, a plurality of the partition walls may be included in the plurality of through holes and are formed to cross each other.

"In some embodiments, a size of a width of each of the partition walls may be from 5% to 20% of a size of each of the plurality of through holes.

"In some embodiments, side walls of the plurality of through holes may have stairs shapes.

"In some embodiments, side walls of the plurality of through holes may be formed of insulation materials.

"In some embodiments, the organic light-emitting display apparatus, further comprising an auxiliary layer, wherein the auxiliary layer and the TFT are sequentially stacked on the display substrate, wherein the TFT comprises an active layer, a gate insulating layer covering the active layer, a gate electrode insulted from the active layer by the gate insulating layer, an interlayer insulating layer covering the gate electrode, and a source electrode and a drain electrode that are formed on the interlayer insulating layer and contact the active layer, and wherein the bonding layer comprises a layer in which the interlayer insulating layer extends.

"In some embodiments, an auxiliary layer and the TFT may be sequentially stacked on the display substrate, wherein the TFT includes an active layer, a gate insulating layer covering the active layer, a gate electrode insulted from the active layer by the gate insulating layer, an interlayer insulating layer covering the gate electrode, and a source electrode and a drain electrode that are formed on the interlayer insulating layer and contact the active layer, and wherein the bonding layer includes a layer in which the interlayer insulating layer extends.

"In some embodiments, the bonding layer may have a structure in which a first insulation layer, a second insulation layer, and a third insulation layer are sequentially stacked, wherein the first insulation layer, the second insulation layer, and the third insulation layer are formed of the same materials of the auxiliary layer, the gate insulating layer, and the interlayer insulating layer, respectively.

"In some embodiments, the bonding layer may include a light absorption layer, wherein the light absorption layer is formed of the same material as the gate electrode.

"According to another aspect of the present disclosure, there is provided an organic light-emitting display apparatus including a display unit and a sealing unit surrounding the display unit, wherein the sealing unit includes: a display substrate; a bonding layer including a first insulation layer formed on the display substrate; a light absorption layer formed on the first insulation layer and formed of a conductive material, a second insulation layer covering the light absorption layer, and through holes including partition walls therein; and a sealing material bonded to the display substrate through the through holes.

"According to another aspect of the present disclosure, there is provided an organic light-emitting display apparatus comprising a display unit and a sealing unit surrounding the display unit, wherein the sealing unit includes: a display substrate; a bonding layer; and a sealing material bonded to the display substrate through the through holes, whererin said bonding layer comprises a first insulation layer formed on the display substrate, a light absorption layer formed on the first insulation layer and formed of a conductive material, a second insulation layer covering the light absorption layer, and through holes comprising partition walls therein.

"In some embodiments, the partition walls may be formed of insulating materials.

"In some embodiments, the through holes may have rectangular shapes, and wherein a plurality of the partition walls are included in the through holes and cross each other.

"In some embodiments, the display substrate and the sealing material may be formed of the same material.

"According to another aspect of the present disclosure, there is provided a method of manufacturing an organic light-emitting display apparatus, the method including: preparing a display substrate partitioned by a first region and a second region surrounding the first region; sequentially forming an auxiliary layer, an active layer of a TFT, a gate insulating layer, a gate electrode, and an interlayer insulating layer in the first region; sequentially forming a first insulation layer, a second insulation layer, and a third insulation layer in the second region; and forming through holes that pass through the first insulation layer, the second insulation layer, and the third insulation layer and including partition walls therein.

"In some embodiments, the sequentially forming of the first insulation layer, the second insulation layer, and the third insulation layer in the second region may include: forming a light absorption layer.

"In some embodiments, the light absorption layer may be formed concurrently with the gate electrode.

"In some embodiments, the auxiliary layer and the first insulation layer may be concurrently formed, wherein the gate insulating layer and the second insulation layer are concurrently formed.

"In some embodiments, side walls of the through holes may have stairs shapes.

"In some embodiments, a half-tone mask may be used to form the through holes.

"In some embodiments, a plurality of the partition walls may be formed in the through holes.

BRIEF DESCRIPTION OF THE DRAWINGS

"The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which:

"FIG. 1A is a cross-sectional view of an organic light-emitting display apparatus, according to an embodiment of the present disclosure;

"FIG. 1B is a schematic plan view of a structure of the organic light-emitting display apparatus of FIG. 1;

"FIG. 2A is a cross-sectional view of the organic light-emitting display apparatus including a sealing unit taken along a line I-I' of FIG. 1B;

"FIG. 2B is a cross-sectional view of an organic light-emitting display apparatus including a sealing unit, according to another embodiment of the present disclosure;

"FIG. 2C is a cross-sectional view of an organic light-emitting display apparatus including a sealing unit, according to another embodiment of the present disclosure;

"FIGS. 3A through 3C are plan views of a sealing unit, according to embodiments of the present disclosure; and

"FIGS. 4A and 4B are plan views of a sealing unit, according to other embodiments of the present disclosure."

For more information, see this patent application: Lee, Jae-Man; Yoo, Seung-Joon; Choi, Hyun-Soo; Shin, Jae-Wook. Organic Light-Emitting Display Apparatus and Method of Manufacturing the Same. Filed March 20, 2013 and posted July 10, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=6464&p=130&f=G&l=50&d=PG01&S1=20140703.PD.&OS=PD/20140703&RS=PD/20140703

Keywords for this news article include: Electronics, Light-emitting Diode, Samsung Display Co. Ltd.

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Source: Electronics Newsweekly


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