Samsung Display Co., Ltd.

Kiyoung Yeon

Wooyoung Lee

Chul Huh

Byung-chul Kim

Inok Kim

Inseok Song

Sujeong Kim

Hyeran Mun

Yui-ku Lee

Sun-kyu Joo

Junghyun Cho

Younggil Park

Nari Ahn

Haeyoung Yun

Sooim Jeong

Sun-Kyu Joo

Dongyoun Yoo

A display device including a substrate that includes a circuit layer; an insulating layer on the substrate; a pixel defining layer on the insulating layer, the pixel defining layer having an opening exposing a region of a top surface of the insulating layer; a light blocking layer covering a top surface and a side surface of the pixel defining layer; and an organic electroluminescent element in the opening, wherein the organic electroluminescent element includes a first electrode on the region of the top surface of the insulating layer exposed through the opening; at least one organic layer on the first electrode; and a second electrode on the at least one organic layer.

Display device including a light blocking layer over a pixel defining layer

An organic light-emitting display apparatus includes a substrate; thin film transistors; a protective layer that includes a plurality of concave-convex units disposed in a pixel area; an organic light-emitting device disposed on the protective layer; and an encapsulation unit that covers the organic light-emitting device. Each of the concave-convex units protrudes from a surface of the protective layer. The organic light-emitting device includes a pixel electrode, an emission layer, and an opposite layer sequentially stacked on the concave-convex unit, and a distance between the pixel electrode and the opposite electrode is determined by 5%&#x2264;(a/b)&#x2264;18%, wherein 'a' is a vertical distance with respect to the surface of the protective layer between the pixel electrode and the opposite electrode and 'b' is a minimum distance between the pixel electrode and the opposite electrode.

Organic light-emitting display apparatus

An apparatus of testing a stick includes a tension unit that applies tension to a stick having openings formed therein and fixes the stick in place, a first testing unit that is spaced apart from the stick and tests a surface of the stick, a light dispersion unit that reflects light emitted from the first testing unit, a distance measurement unit that measures a third distance from a bottom surface of the stick to the light dispersion unit, and a control unit that calculates a second distance from a starting point of a protrusion of the stick tested by the first testing unit to the light dispersion unit, calculates a difference between the second distance and the third distance so as to calculate a height of the protrusion and determines whether the stick is defective or not, based on the height of the protrusion.

Apparatus and method of testing a stick

Growing community of inventors

Yongin-si, South Korea

Kiyoung Yeon