METHOD FOR PREPARING PIXEL DEFINE LAYER

In the case of a pixel separation layer used in an OLED display, a hardness is generally 500 N/mm^2 or higher and a modulus is 7,000 Mpa or higher, but since a polarizing plate is absolutely necessary, there are physical disadvantages such as not being bendable and being heavy. On the other hand, a...

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Bibliographische Detailangaben
Hauptverfasser:	KIM KYUNG SOO, LEE YEON SOO, BAE JUN, CHANGMIN LEE, MUN SOUNG YUN
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	APPARATUS SPECIALLY ADAPTED THEREFOR CINEMATOGRAPHY ELECTRICITY ELECTROGRAPHY HOLOGRAPHY MATERIALS THEREFOR ORIGINALS THEREFOR PHOTOGRAPHY PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES PHYSICS
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Beschreibung
Zusammenfassung:	In the case of a pixel separation layer used in an OLED display, a hardness is generally 500 N/mm^2 or higher and a modulus is 7,000 Mpa or higher, but since a polarizing plate is absolutely necessary, there are physical disadvantages such as not being bendable and being heavy. On the other hand, a pixel separation layer according to the present invention enables implementation of a flexible display and reduces the thickness and weight of the display. In addition, visibility increases through blocking and absorption of external reflected light, and a hardness and modulus are improved to the level of conventional pixel separation layers, thereby enabling implementation of a display without cracks even under external impact. Therefore, according to the present invention, a coloring pattern with high optical density can be implemented on an electrode substrate so that the color thereof is vivid, and the impact resistance, reliability, and lifespan of the display can be improved. The method for manufacturing a pixel definition layer comprises: a step of applying and coating a photosensitive composition; a prebaking step; an exposure step; a development step; and a post-heat treatment step. OLED 디스플레이에 사용되는 화소분리층의 경우 일반적으로 소성경도가 500 N/mm2 이상이고 모듈러스는 7,000Mpa 이상인 수준을 나타내지만 편광판이 반드시 필요하기 때문에 휘어지지 않고 무겁다는 물리적인 단점을 가진다. 반면, 본 발명에 따른 화소분리층은 플렉서블한 디스플레이 구현이 가능하고 디스플레이의 두께 및 무게가 감소한다. 또한, 외부반사광의 차단과 흡수를 통하여 시인성이 증가하며, 소성경도 및 모듈러스를 종래의 화소분리층 수준까지 개선하여 외부 충격에도 크랙이 없는 디스플레이 구현이 가능하다는 장점을 가진다. 결국, 본 발명은 광학 밀도가 높은 착색 패턴을 전극 기판 위에 구현하여 색상이 선명할 뿐만 아니라 디스플레이 내충격성, 신뢰성 및 수명을 향상시킬 수 있다.