| 词汇 | light-pen |
| 释义 | light pen noun[ C ] (alsolightpen)uk /ˈlaɪt ˌpen/ us /ˈlaɪt ˌpen/ a pen-shaped device for making lines, writing, etc. appear on a computer screen: You can draw on the tablet screen using a light pen. The pad uses a lightpen to "write" data directly onto the screen. a pen-shaped device used for reading bar codes: 读码器，条形码扫描器 You access the system simply by moving a light pen across the bar code. Light pens are rarely seen these days, now that touchscreens and graphics tablets are widely available. The device came with a child-size mouse, a colour printer and a light pen for drawing. You can highlight one of the options by tapping the touchscreen or with the lightpen. Instead of using chalk or markers, students answer questions using light pens or hand-held clickers. Computer hardware 3-D printer active matrix agnostic alt- associative memory backlight Bluetooth chip console flat screen microcomputer multitasker netbook non-mobile number pad optical character reader plug and play trackball underscore VDT light pen | Business Englishlight pen noun[ C ] ITukus a pen-shaped object that uses beams of light to read bar codes (= small rectangular patterns of printed lines that store data) or that you use to touch a computer screen in order to choose information: Outgoing inventory can be quickly checked with light pens connected to each terminal. Examples of light penlight pen The endocardial contour of an end-systolic and an end-diastolic frame was digitized with a lightpen on an electronic drawing board. The process is carried out by means of a lightpen which reads a bar code which transmits information on to a magnetic tape. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 A lightpen 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. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In that system, the user could draw using a lightpen on a screen and manipulate graphic primitives such as arcs and lines. Terminals provided data entry capability into mainframes as well as lightpen pointing and selection before the mouse was in use. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The lightpen itself had a small photoelectric cell in its tip. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The computer had a wide selection of ports, including one for a lightpen. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The other system, still in use in 2004, is based on a magnetic card and a voting machine with a lightpen. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The lightpen allows the user to draw, to create images and to indicate, on the screen. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The right monitor, which played the preview video, was used by the editor to make cuts and edit decisions using a lightpen. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The 6845 had support for a lightpen, an alternative to a computer mouse. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The lightpen found use during the early 1980s. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Another innovative feature for that time was the user interface combining a keyboard with a monitor and lightpen for correcting texts and drawing on screen. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Another innovative feature for that time was the user interface combining a keyboard with a monitor and lightpen used for correcting texts and drawing on screen. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. As the tip of the lightpen makes contact with the screen, it sends a signal back to the computer containing the coordinates of the pixels at that point. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. See all examples of light pen These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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