In 2013, 79% of the world's households owned a television set The replacement of bulky, high-voltage cathode ray tube (CRT) screen displays with compact, energy-efficient, flat-panel alternatives such as plasma displays, LCDs (both fluorescent-backlit and LED-backlit), and OLED displays was a major hardware revolution that began penetrating the consumer computer monitor market in the late 1990s and soon spread to TV sets. In 2014, most of the TV sets sold were LCDs mainly LED-backlit LCD displays. Major TV manufacturers announced the discontinuation of CRT, RPTV, plasma and even fluorescent-backlit LCDs by 2014.