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.

Oct 18, 2023 · A light pen is a type of pointing input device that detects light and is frequently used to select or alter text or data on a screen. These devices, when used with a CRT (cathode ray tube) monitor, were an early method of highlighting and modifying data on the screen.

Oct 11, 2017 · A light pen is a light-sensitive pointing input device commonly used to select or otherwise modify text or data on a screen. Used with a CRT (Cathode Ray Tube) monitor, these devices were an early form of manipulating and highlighting data on the screen.

Mar 9, 2025 · Definition of Light pen -: Light Pen, which is similar to the Normal Pen, is a pointing input device that is used to select the menu or picture display on the screen of a mobile or computer.

Mar 26, 2025 · The meaning of LIGHT PEN is a pen-shaped device for direct interaction with a computer through a cathode-ray tube display. How to use light pen in a sentence.

Jun 2, 2024 · A light pen is a pointing device that resembles a pen and is used to interact with a computer screen or monitor. It is a handheld device that emits light and is equipped with a light-sensitive detector at the tip.

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Jul 28, 2023 · Discover the advantages and disadvantages of light pens. Learn about precise input, intuitive interaction, versatility, compatibility issues, line-of-sight dependency, ambient lighting sensitivity, and more.

A light pen, basically a stylus, is a light-sensitive directing computer input device. It is generally used to highlight text, object or alter data on a computer screen or monitor. Similar to a touchscreen, it allows users to interact with user interface objects available on the screen but with greater positional accuracy.

Apr 4, 2017 · History: The light pen is a unique antecedent, as it is a first attempt at touchscreen technology. It is a “penlike input device that was used with cathode-ray tube display to point at items on the screen or to draw new items or modify existing ones.