Display kit maker Youngwoo DSP recorded 40.9 billion won in sales and 6.3 billion won in operating income in the first quarter.
It is an increase of 81% and 1220%, respectively, from a year prio.
The company said it saw high demand for its display equipment, especially China.
Earnings from display inspection equipment it supplies to a Chinese customer was reflected on the quarterly performance.
A Youngwoo DSP spokesperson said besides OLED, it has inspection technology for quantum dot nanorod LED (QNED), quantum dot (QD)-OLED and MicroLED technologies, which will continue to help growth.
Display companies were restarting investments, which will provide continued demand, they added.