Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q20139> ?p ?o }
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- Q20139 subject Q6482615.
- Q20139 abstract "A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's CRT display. It allows the user to point to displayed objects or draw on the screen in a similar way to a touchscreen but with greater positional accuracy. A light pen can work with any CRT-based display and other display technologies, but its ability to be used with LCDs was unclear (though Toshiba and Hitachi displayed a similar idea at the "Display 2006" show in Japan).A light pen detects a change of brightness of nearby screen pixels when scanned by cathode ray tube electron beam and communicates the timing of this event to the computer. Since a CRT scans the entire screen one pixel at a time, the computer can keep track of the expected time of scanning various locations on screen by the beam and infer the pen's position from the latest timestamp.".
- Q20139 thumbnail HypertextEditingSystemConsoleBrownUniv1969.jpg?width=300.
- Q20139 wikiPageWikiLink Q1055974.
- Q20139 wikiPageWikiLink Q1110955.
- Q20139 wikiPageWikiLink Q1227035.
- Q20139 wikiPageWikiLink Q1413683.
- Q20139 wikiPageWikiLink Q165970.
- Q20139 wikiPageWikiLink Q18817212.
- Q20139 wikiPageWikiLink Q202712.
- Q20139 wikiPageWikiLink Q2396081.
- Q20139 wikiPageWikiLink Q249075.
- Q20139 wikiPageWikiLink Q327065.
- Q20139 wikiPageWikiLink Q386610.
- Q20139 wikiPageWikiLink Q49108.
- Q20139 wikiPageWikiLink Q512222.
- Q20139 wikiPageWikiLink Q523204.
- Q20139 wikiPageWikiLink Q5968598.
- Q20139 wikiPageWikiLink Q6482615.
- Q20139 wikiPageWikiLink Q68.
- Q20139 wikiPageWikiLink Q725893.
- Q20139 wikiPageWikiLink Q731861.
- Q20139 wikiPageWikiLink Q749976.
- Q20139 wikiPageWikiLink Q83341.
- Q20139 wikiPageWikiLink Q83913.
- Q20139 wikiPageWikiLink Q864114.
- Q20139 comment "A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's CRT display. It allows the user to point to displayed objects or draw on the screen in a similar way to a touchscreen but with greater positional accuracy.".
- Q20139 label "Light pen".
- Q20139 depiction HypertextEditingSystemConsoleBrownUniv1969.jpg.