In 1988 I worked for around a year for a company which used NAPLPS for various Data Broadcast advertising devices.
It actually had quite impressive graphics capabilities, although the vector graphics took some time to draw (using NEC V30 CPUs), and an additional graphics
processor chip (made my Intel if I recall).
Data Broadcast being a commercial use of the UK TV channel for various things, i.e. essentially a commercialization of the data channel over which Teletext was sent, Teletext had some of the flyback lines, DB had some others.
It actually had quite impressive graphics capabilities, although the vector graphics took some time to draw (using NEC V30 CPUs), and an additional graphics processor chip (made my Intel if I recall).
Data Broadcast being a commercial use of the UK TV channel for various things, i.e. essentially a commercialization of the data channel over which Teletext was sent, Teletext had some of the flyback lines, DB had some others.