Samsung Electronics Co., Ltd.

Korea Advanced Institute of Science and Technology

Hyung-Min Lee

Yong-Joon Jeon

Gyu-Hyeong Cho

Gyu Hyeong Cho

Sung-Woo Lee

Yoon-kyung Choi

Young-Min Baik

Young-Suk Son

Hyoung-Rae Kim

Mi-Kyung Lee

Jin Yong Jeon

Byoung-Sam Kim

Seung-Chul Jung

A digital-to-analog converter includes a voltage-to-current converter, a current-mode digital-to-analog converter and an operational amplifier. The voltage-to-current converter generates a first current signal, and the current-mode digital-to-analog converter generates a second current signal. The operational amplifier modulates a drain current in response to the second current signal and generates an output signal having an offset.

Digital-to-analog converter, source driving circuit and display device having the same

A driving apparatus for a display is provided. The driving apparatus for a display comprises a reference voltage generator, a digital-to-analog converter, and an output unit. The reference voltage generator generates a plurality of reference voltages, and receives a difference value between two adjacent reference voltages and generates a plurality of sub reference voltages. The digital-to-analog converter selects one of the reference voltages and outputs the selected reference voltage as a first analog signal. The digital-to-analog converter selects one of the sub reference voltages and outputs the selected reference voltage as a second analog signal. The output unit processes, by addition or subtraction, the first and second analog signals for output.

Driving apparatus for display

Enclosed is an apparatus for analyzing micro-bubbles inside a high-purity glass tube by using a laser light dispersion. The apparatus includes: an optical base having a sample stage in a substantially horizontal orientation; a glass tube rotably mounted on the optical base in a substantially vertical orientation, the glass tube being rotated and translated in a vertical direction at a predetermined speed via the sample stage; a light generator disposed at one side of the glass tube for selectively irradiating a laser light onto an outer surface of the glass tube at a prefixed angle; and, a detector disposed at the other side of the glass tube for detecting the distribution and amount of micro-bubbles of the glass tube using the laser light passed through the glass tube.

Micro-bubble analyzing apparatus for high-purity glass tube using laser light scattering

Growing community of inventors

Daegu, South Korea

Hyung-Min Lee