Что (кто) такое light pen - определение

COMPUTER INPUT DEVICE

Lightpen; Light Pen; Light gun (Whirlwind); Light gun (SAGE); Lightgun (Whirlwind); Lightgun (SAGE)

light pen

¦ noun

1. a hand-held pen-like photosensitive device held to a computer display screen for passing information to the computer.

2. a hand-held device for reading bar codes.

light pen

<hardware> An early pointing device which the user pointed at a raster-scanned display screen. A photocell in the pen detected the flying spot of the raster scan. The position of the spot at that instant, obtained from the scanning electronics, was made available to software as (x, y) co-ordinates. (2003-12-02)

Light pen

A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's cathode-ray tube (CRT) display.

https://en.wikipedia.org/wiki/Light_pen

Википедия

Light pen

A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's cathode-ray tube (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, 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 changes in 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 time stamps.

https://en.wikipedia.org/wiki/Light pen

Примеры произношения для light pen

1. on at the side using this light pen to select

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