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The light pen is used to draw objects on a CRT computer screen. They are also used to display objects over computer devices.

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10y ago

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Why are light pen is called light pen?

A light pen is called so because it is a handheld input device that can detect light on a computer screen. It uses a photocell to detect the presence of light emitted by the screen, allowing it to function as a pointing device.


Working principle of light pen?

The principle is the infrared light source that is inside. It takes all of the colors in the spectrum and uses them to make the light work.


What is another name for the light pen?

a pen light :)


What are the functions of the light pen?

function of light pen


Why is using a pen differ from writing with a pencil?

A pen uses ink while a pencil uses lead.


Is a light pen a input output?

Light Pen is an input Device.


Is a light pen a input or output?

Light Pen is an input Device.


Who uses a pen?

teachers


What does a light pen contain?

A light pen typically contains a light sensor that detects light emitted from a computer screen. When the pen is pressed against the screen, the sensor registers the light and communicates with the computer to determine the pen's position on the screen.


What are the uses of lines?

technical PEN.


What is a 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 CRT TV set or monitor. It allows the user to point to displayed objects, or draw on the screen, in a similar way to a touch screen but with greater positional accuracy. A light pen can work with any CRT-based display, but not with LCD screens (though Toshiba and Hitachi displayed a similar idea at the "Display 2006" show in Japan[1]), projectors and other display devices. An input device that utilizes a light-sensitive detector to select objects on a display screen. A light pen is similar to a mouse, except that with a light pen you can move the pointer and select objects on the display screen by directly pointing to the objects with the pen.


Output device used to draw building plans?

Mouse or light pen