Duk San Neolux Co., Ltd.

Yeon Soo Lee

Soung Yun Mun

Jun Bae

Changmin Lee

Kyung Soo Kim

Jun Ki Kim

Seo Jeong Jeon

Jaehyun Lim

Ju Cheol Kwon

Jin Hyun Kim

Hye Jung Choi

Hak Young Lee

Hyunsang Cho

Hanwook Seo

Provided is an implementation of a coloring pattern with a low moisture content on an electrode substrate to thereby improve display reliability and lifetime as well as vivid colors. That is, since when the moisture content is 50 ppm or more, it may cause a reduction in luminance and lifetime due to pixel shrinkage, in order to minimize the moisture content after completion of the post-baking process, the generation of moisture in the panel state is minimized by generating sufficient heat and time in the post-baking step, by including the colorant of the presently claimed subject matter.

Method for preparing pixel define layer

An object of the present disclosure is to improve display reliability and lifetime as well as vivid colors. When there remain residues in the washing part due to incomplete removal during the developing step, it can cause dark spots or pixel off due to the residues, and thus residue-free pixels can be formed by optimizing the temperature and time for developing. Additionally, when the amount of outgas in the panel after post-baking is 15 ppm or more, it may cause a reduction in luminance and lifetime due to pixel shrinkage. Therefore, in order to minimize the amount of outgas after completion of the post-baking process, the generation of outgas in the panel state can be minimized by generating sufficient fume in the post-baking step, in addition to forming clean pixels in the developing step.

An object of the present disclosure is to implement a coloring pattern with a low amount of outgas on an electrode substrate to thereby increase reliability and lifetime of display as well as vivid colors of the same. That is, considering that when the amount of outgas in the panel after post-baking is 15 ppm or more, it may cause a reduction in luminance and lifetime due to pixel shrinkage, in order to minimize the amount of outgas after completion of the post-baking process, the generation of outgas in the panel state is minimized by generating sufficient fume in the post-baking step by way of including a colorant according to the present disclosure.

Provided are a method for preparing a pixel defining layer comprising applying and coating, pre-baking, exposing to light, developing, and post-baking of a photosensitive composition containing a colorant having a pigment with an average particle size of 100 nm or less, wherein the coated film generated after the post-baking has an optical density of 0.8/μm to 2.0/μm, a roughness of 3.0 nm or less, and no residue; and an organic light emitting display device comprising the pixel defining layer obtained by the method which has improved display reliability and lifetime as well as vivid colors.

An object of the present disclosure is to implement a coloring pattern with a high optical density on an electrode substrate to improve display reliability and lifetime of a display as well as vivid colors. That is, the present disclosure relates to a composition and a method that can form the pattern of a pixel defining layer that can improve visibility and contrast by satisfying the optical density of 0.80/μm to 1.5/μm in the panel after post-baking treatment.

An object of the present disclosure is to implement a coloring pattern with a constant illuminance value on an electrode substrate to thereby increase display reliability and lifetime while reducing delamination of the hole transport layer (HTL) in the post-process. That is, when the roughness of the pattern after post-baking treatment is low, it may cause delamination of the hole transport layer (HTL) and a decrease in lifetime due to defective pixels, and thus a certain roughness can be obtained by minimizing the surface flow by leaving the substrate at a high temperature during post-baking treatment according to the present disclosure.

Growing community of inventors

Cheonan-si, South Korea

Yeon Soo Lee