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The combination of a plastic negative photographic overlay, a CRT display and a light pen are used to facilitate entry of character information for languages of large character sets into a data system.
English (United States)
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Data Entry for Large Character Set Languages
The combination of a plastic negative photographic overlay, a CRT display
and a light pen are used to facilitate entry of character information for languages
of large character sets into a data system.
The overlay, to be mounted on the CRT, has all of the characters of the
language visible thereon. The scanning spot of the display is detected through a
selected character on a segment of the overlay by the light pen using
conventional light-pen techniques. Information corresponding to the visually
displayed detected character is thus entered in the system.
The plastic overlay can be readily changed for character sets of different
languages. This technique is useful for ideographic languages where there is
difficulty in accurately forming characters.