The television.

By Paula Nieto.

  • The first televisions.

    The first televisions.
    The first televisions that can be considered commercial were of a mechanical type and were based on a rotating disc, which contained a series of holes arranged in a spiral and that allowed a "line by line" exploration to be made of a strongly illuminated image.

  • Mechanical television.

    Mechanical television.
    It was marketed from 1928 to 1934 in the United Kingdom, the United States, and the USSR.

  • CRT.

    CRT.
    The mechanical system was soon displaced by the use of the CRT (cathode ray tube) as an image generating element, which allowed to achieve better resolutions and scanning speeds.

  • Color televisions.

    Color televisions.
    they were widely disseminated and began to be marketed in Teveloped countries.

  • Digital Television.

    Digital Television.
    The biggest step that has been taken in the technological evolution of television from color television was digital television.

  • TDT.

    TDT.
    TDT (Digital Terrestrial Television) begins to give its first broadcasts in the United States.

  • IPTV.

    IPTV.
    System that uses broadband connections and is distributed by subscription of pay TV signals.

  • High definition televisions.

    High definition televisions.
    High definition televisions, internet and 3D technology compatible with mobile devices.