Taiwan lags far behind South Korea in the development of organic light emitting diodes (OLED) , and the government and industrial sector should think about a model for cooperation in this area, an expert said Wednesday. National Tsing Hua University professor Cheng Chien-hung noted that Taiwan developed OLED technology early, and that five years ago it was on par with South Korea in this field. However, Taiwan is now lagging behind South Korea, Europe, Japan and the United States in terms of OLED technology advances, he said. He urged the Taiwan government and industrial sector to think seriously about a cooperation model so as to cash in on trade opportunities. Cheng said that Samsung maintained its strong lead in OLED shipments last year and captured a 73 percent market share in AMOLED (Active-matrix OLED) revenues, while Taiwan's RiTdisplay ranked second with a 12 percent share. Cheng said that OLED, with their advantages of high display quality, wide vision and fast speed and low temperature endurance, should be the trend of the future. A cell phone with an OLED screen will not become fogged even in the sub-zero temperatures of the 3,932-meter Mt. Jade, Taiwan's highest peak, he said. OLED displays have a significant advantage over traditional liquid crystal displays (LCDs) , as OLEDs do not require a backlight to function. Thus, they can display deep black levels, use much less power, and can be much thinner and lighter than LCD panels. OLED displays also naturally achieve much higher contrast ratio than LCD screens, with the use of cold cathode fluorescent lamps and newer LED backlights. 