Hee-Seop Kim
Samsung
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Publication
Featured researches published by Hee-Seop Kim.
Optics Express | 2012
Dong Han Song; Jung-Wook Kim; Ki-Han Kim; Soon Joon Rho; Hyeokjin Lee; Hee-Seop Kim; Tae-Hoon Yoon
We propose an ultrafast nematic liquid crystal (LC) device without alignment layers, where both the dark and bright states can be realized by applying an electric field. A vertical electric field is applied to vertically align the LCs for the dark state, whereas an in-plane electric field is applied to homogeneously align the LCs for the bright state. We achieved a total response time of less than 3 ms in the proposed device. This device may contribute, not only to a significant improvement of the switching speed in liquid crystal devices, but also to the simplification of the device fabrication by the omission of the alignment layer coating and the rubbing process.
SID Symposium Digest of Technical Papers | 2008
Yong-Hwan Shin; Jae-jin Lyu; Hee-Seop Kim; Sung-Tae Shin; Jun-Hyung Souk
We described the mechanism of improvement of “Mura on Diagonal Direction”. Mura on Diagonal Direction (Diagonal Mura from now on) occurred by “Stress-Induced Birefringence” which is caused by spatial temperature variation. We suggest the way of improvement of Diagonal Mura by following three methods. 1)Improvement of spatial temperature variation of BLU(Back Light Unit). 2)Reduction of heat stress on glass by means of change the configuration of compensation film of polarizer. 3)Using glass with low photo-elastic coefficients to reduce stress-induce birefringence.
Archive | 2011
Seung Jun Jeong; Kyung-Ho Jung; Seung-Hoon Lee; Hee-Seop Kim; Hae-Young Yun; Hwi Kim; Il-joo Kim; Kyung-Bae Kim; Jung-Hwan Yi
Archive | 2009
Sung-Woon Kim; Hee-Seop Kim; Hae-Young Yun; Jian Gang Lu; Kyung-Ho Jung; Seung-Hoon Lee
Archive | 2010
Hwi Kim; Hae-Young Yun; JianGang Lu; Kyung-Ho Jung; Seung-Hoon Lee; Jung-Hwan Yi; Hee-Seop Kim
Archive | 2009
Hae-Young Yun; Hee-Seop Kim; Kyung-Ho Jung; Seung-Hoon Lee; Hwi Kim; Jung-Hwan Yi
Archive | 2009
Hee-Seop Kim; Jae-jin Lyu; Doo-Hwan You
Archive | 2008
JianGang Lu; Sung-Woon Kim; Seung-Hoon Lee; Hee-Seop Kim; Chun-Seok Ko; Mee-Hye Jung; Si-Duk Sung; Kwang-Chul Jung
Archive | 2016
Jun-Woo Lee; Hee-Seop Kim; Chang-hun Lee; Eun-Hee Han
Archive | 2010
Hwi Kim; Hae-Young Yun; JianGang Lu; Kyung-Ho Jung; Seung-Hoon Lee; Jung-Hwan Yi; Hee-Seop Kim