The red, green and blue components of the signal are fed into three separate high-definition cathode-ray tubes (in effect, fancy black-and-white televisions).

ECONOMIST: Curtains for celluloid

It said that it was concerned that the regulator had calculated the fine based of the number of TV sets and PC monitors sold by LG Electronics in Europe rather than the sales of just cathode ray tubes.

BBC: LG Electronics to appeal EU price-fixing fine

When it came to scoreboards for sports stadiums, incandescent bulbs were no match for cathode-ray tubes (CRTs) used in the giant video displays pioneered by Sony and Mitsubishi.

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