Color Television
Colour television is a television transmission technology that includes information on the color of the picture, so the video image can be displayed in colour on the television set. It is an improvement on the earliest television technology, monochrome or black and white television, in which the image is displayed in shades of gray (grayscale). Television broadcasting stations and networks in most parts of the world upgraded from black and white to colour transmission in the s and s. The invention of colour television standards is an important part of the history of television, and it is described in the technology of television article. Transmission of colour images using mechanical scanners had been conceived as early as the s. A practical demonstration of mechanically-scanned colour television was given by John Logie Baird in , but the limitations of a mechanical system were apparent even then. Development of electronic scanning and display made an all-electronic system possible.