The Hong Kong-based company had planned to begin mass production of the display during the first quarter of next year.
LG.Philips Displays said it will add production lines capable of producing 800,000 units at its plant in Gumi, 261 kilometers southeast of Seoul, by the end of June next year.
The mass production of 32-inch CRT displays, which began late last month, is expected to heat up competition with the company's rival Samsung SDI Co., industry observers said.
In July, Samsung SDI announced it had developed a 32-inch CRT display. The company said it will start mass production during the first half of next year.
The thinner CRT display is expected to have an advantage in the competition with flat-panel screens such as liquid crystal displays and plasma display panels given its better picture quality and cheaper price, LG.Philips Displays said.