Tenan, South Korea
Tenan, South Korea

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Kim M.,GJM Co. | Jun S.,Kongju National University | Kim S.,GJM Co. | Lee M.,GJM Co. | Lee E.K.,Kongju National University
Electronic Materials Letters | Year: 2013

Pure organic material is necessary for high-performance OLED (Organic Light Emitting Diodes) displays and lighting, and a sublimation purifier is needed to purify the raw organic material. For efficient production, a sublimation purifier must consider yield and heat control according to the diameter of the quartz glass. In this paper, computer simulations were performed to consider the issues of material yield and thermal uniformity in developing a sublimation purifier. Using the results of the computer simulation, an optimized design was suggested. © 2013 The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht.


Jun S.,Kongju National University | Kim M.,GJM Co. | Kim S.H.,GJM Co. | Lee M.Y.,GJM Co. | Lee E.K.,Kongju National University
Electronic Materials Letters | Year: 2013

In Organic Light Emitting Display (OLED) manufacturing processes, there is a need to enlarge the mother glass substrate to raise its productivity and enable OLED TV. The larger the size of the glass substrate, the more difficult it is to establish a uniform thickness profile of the organic thin-film layer in the vacuum evaporation process. In this paper, a multiple point-source evaporation process is proposed to deposit a uniform organic layer uniformly. Using this method, a uniformity of 3.75% was achieved along a 1,300 mm length of Gen. 5.5 glass substrate (1300 × 1500 mm2). © 2013 The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht.


Kim M.,GJM Co. | Lee E.K.,Kongju National University
Journal of Nanoelectronics and Optoelectronics | Year: 2016

The purity of the organic materials used in OLEDS has a major impact the luminescence characteristics of these devices. Impurities in an organic material prevent the transport of holes and electrons, or cause quenching. For high-performance OLED display and lighting applications, high purity of the organic material is necessary. Hence sublimation purifiers are often used to purify organic materials. The purity and the yield of the organic materials affect performance and cost of OLED products. In this paper, an inner reflection tube for a sublimation purifier is proposed. Moreover, in a vacuum environment, an organic material flow is simulated to improve the purification yield with the inner reflection tube. The inner reflection tube affects the material yield directly. Therefore, to reduce losses through the exhaust line, a DSMC simulation was conducted in an effort to find ways to improve the material yield by optimizing the design of the inner reflection tube. In the results of an experiment, the yield of a conventional sublimation purifier was 92.4% but with the reflection tube, the yield was improved to 96.3%. Copyright © 2016 by American Scientific Publishers All rights reserved.


Trademark
Gjm Llc | Date: 2011-01-07

Animal carriers; Animal harnesses; Animal leashes; Animal training device in the nature of a metal can containing coin-sized pieces of metal; Animal wraps and covers; Cellulose for use as animal bedding; Clips that are applied to the scruff of an animals neck to pinch-induce a behavioral inhibition response; Clothing for animals; Clothing for domestic pets; Collars for animals; Collars of animals; Dog clothing; Feed bags for animals; Leashes for animals; Leggings for animals; Mats and pads made of fabric for use with animal training; Paper for use as animal bedding; Pet accessories, namely, specially designed canvas, vinyl or leather bags attached to animal leashes for holding small items such as keys, credit cards, money or disposable bags for disposing of pet waste; Pet clothing; Small animal bedding made of recycled paper.


Trademark
Gjm Llc | Date: 2011-08-02

Clothing for animals; Clothing for domestic pets; Diapers for dogs; Dog apparel; Dog clothing; Dog coats; Dog collars; Dog collars and leads; Dog leashes; Dog parkas; Dog shoes; Neckwear for dogs; Pet clothing.


Trademark
Gjm Llc | Date: 2015-04-13

Essential oils for use in aromatherapy. Aromatherapy sprays for DOGS.


Trademark
Gjm Llc | Date: 2010-03-27

Garments for pets.


Trademark
Gjm Llc | Date: 2014-11-15

Animal harnesses.


Trademark
Gjm Llc | Date: 2015-04-16

Animal harnesses; Animal harnesses for DOGS; Dog clothing; Dog coats; Pet clothing for DOGS.

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