Joon-Yong Choi

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international solid-state circuits conference | 2007

Kwang-Jin Lee; Beak-Hyung Cho; Woo-Yeong Cho; Sang-beom Kang; Byung-Gil Choi; Hyung-Rok Oh; Chang-Soo Lee; Hye-jin Kim; Joon-Min Park; Qi Wang; Mu-Hui Park; Yu-Hwan Ro; Joon-Yong Choi; Ki-Sung Kim; Young-Ran Kim; In-Cheol Shin; Ki-won Lim; Ho-keun Cho; Chang-han Choi; Won-ryul Chung; Du-Eung Kim; Kwang-Suk Yu; G.T. Jeong; Hong-Sik Jeong; Choong-keun Kwak; Chang-Hyun Kim; Kinam Kim

A 512Mb diode-switch PRAM is developed in a 90nm CMOS technology. A core configuration, read/write circuit techniques, and a charge-pump system for the diode-switch PRAM are described. Through these schemes, the PRAM achieves read throughput of 266MB/S and maximum write throughput of 4.64MB/S with a 1.8V supply.

SID Symposium Digest of Technical Papers | 2007

Joohyung Lee; Jun-Bo Yoon; Joon-Yong Choi; Sang-Min Bae

In this paper, we have proposed a novel LCD backlight unit (BLU) composed of a light-guide plate (LGP) mounting high fill-factor microlens array and an optical sheet of conical microlens array with a slanted angle of 54.5°. The proposed BLU shows 13.6% improvement in the total luminance compared with the conventional BLU and the viewing angle of 108° (−42° ∼ 66°). We also have fabricated Ni-stamper with the microlens array pattern for injection molding, one of the cost-efficient methods for mass production.

Archive | 2008