Taiwan-Asia Semiconductor Corporation manufactures and sells optoelectronic semiconductor integrated solutions in Taiwan and internationally. It offers light emitting diode (LED) chips; silicon sensor chips, including photodiode, phototransistor, and zener diode; LED components; and display and lighting products comprising LED displays, LED architectural and stage lightings, LED luminaires, LED automotive lightings, VMS, CMS, and traffic lights. The company was formerly known as Opto Tech Corporation. The company was incorporated in 1983 and is headquartered in Hsinchu, Taiwan.