Samsung Display Co., Ltd.

Dongseob Jeong

Seulong Kim

Hajin Song

Pilgu Kang

Hyekyun Lee

Jihwan Yoon

Jaehoon Hwang

Jimyoung Ye

Jongdae Lee

Sangheon Jeon

Youngeun Ryu

Yalim Kim

Eungyoung Park

Jiyoung Song

Minju Choi

Taekyung Kim

Jungho Choi

Jiyoung Kwon

Soonchul Chang

Yangjin Cho

Soon-Chul Chang

Yang-jin Cho

Jina Hur

Provided is a light emitting device including a first electrode, a hole transport region on the first electrode, a first light emitting layer on the hole transport region and emitting light of a first wavelength, a second light emitting layer on the hole transport region and emitting light of a second wavelength different from the first wavelength, an electron transport region on the first light emitting layer and the second light emitting layer, and a second electrode on the electron transport region. The second light emitting layer includes a first sub-light emitting layer including a first host having a first hole transporting host and a first electron transporting host and a dopant emitting light of the second wavelength, and a second sub-light emitting layer including a second host and a second hole transporting host, but not including the dopant. The light emitting device provides improved light emitting efficiency.

Light emitting device and display apparatus including the same

A deposition mask includes a first area defining a clamping portion at ends of the deposition mask and to which a force is applied to extend the deposition mask in a length direction thereof, a recess area adjacent to the first area and defining a recess at the ends; and a pattern portion including a plurality of pattern holes through which a deposition material passes. Along the length direction, a plurality of first pattern portions are arranged in the first area and a plurality of second pattern portions arranged in the recess area. When the force is applied to the clamping portion, the deposition mask is extended in the length direction thereof and defines non-extended positions of the pattern portions, and for the non-extended positions of the first and second pattern portions, a first distance between adjacent first pattern portions is less than a second distance between adjacent second pattern portions.

Extendible deposition mask and display apparatus provided using the same

A light emitting device includes: a first electrode; a hole transport region disposed on the first electrode; a first emission layer disposed on the hole transport region, and which emits light of a first wavelength; a second emission layer disposed on the hole transport region, and which emits light of a second wavelength different from the first wavelength; an electron transport region disposed on the first emission layer and the second emission layer; a second electrode disposed on the electron transport region; and a capping layer disposed on the second electrode. In exit light emitted to an upper surface of the capping layer, the exit light has a maximum intensity at an azimuth angle of about 25° to about 35°.

A light emitting devices includes a first electrode, a hole transport region on the first electrode, a first emission layer on the hole transport region, the first emission layer to emit light of a first wavelength, a second emission layer on the hole transport region and to emit light of a second wavelength, an electron transport region on the first and second emission layers, and a second electrode on the electron transport region. The first emission layer includes a first sub-emission layer including a first hole transport host and a first sub-dopant to emit the light of the first wavelength, and a second sub-emission layer including a first electron transport and a second sub-dopant to emit the light of the first wavelength. The second emission layer includes a second hole transport host, a second electron transport host, and a second dopant to emit the light of the second wavelength.

A mask assembly and an apparatus and method for manufacturing a display apparatus are provided. A mask assembly includes a mask frame and a mask on the mask frame and having at least one opening. The mask includes a mask body portion having the at least one opening, and a protruding portion arranged to surround the at least one opening and including an inner surface defining the at least one opening, the protruding portion protruding from the mask body portion and configured to protrude toward a display substrate and contact the display substrate. A deposition material is configured to pass through the at least one opening to be deposited in an entire display area of a display panel including a plurality of pixels.

Mask assembly and apparatus and method of manufacturing display apparatus

An organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; an emission region between the first electrode and the second electrode and including a first emission layer and a second emission layer; and a hole blocking layer between the first emission layer and the first electrode, or between the second emission layer and the second electrode, wherein the second emission layer may be between the first emission layer and the hole blocking layer, the first emission layer may include a first host and a first light-emitting material, the second emission layer may include a second host and a second light-emitting material, and the first light-emitting material and the second light-emitting material may respectively be included in the first emission layer and the second emission layer at an identical ratio.

Organic light-emitting device

A light emitting device includes a first electrode, a first stack on the first electrode, a first charge generation layer on the first stack, a second stack on the first charge generation layer, and a second electrode on the second stack. The first stack includes a first light emitting layer and a plurality of first organic layers, and the second stack includes a second light emitting layer and a plurality of second organic layers. Among the plurality of first organic layers and the plurality of second organic layers, at least one of organic layers adjacent to the first light emitting layer and the second light emitting layer includes a light emitting material.

Light emitting device and display panel including same

A deposition mask includes a first area defining a clamping portion at ends of the deposition mask and to which a force is applied to extend the deposition mask in a length direction thereof, a recess area adjacent to the first area and defining a recess at the ends; and a pattern portion including a plurality of pattern holes through which a deposition material passes. Along the length direction, a plurality of first pattern portions are arranged in the first area and a plurality of second pattern portions arranged in the recess area. The force applied extends the first area and does not extend the recess area. The force not applied defines non-extended positions of the pattern portions, and for the non-extended positions of the first and second pattern portions, a first distance between adjacent first pattern portions is less than a second distance between adjacent second pattern portions.

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Yongin-si, South Korea

Dongseob Jeong