This article is about the computer input device. For the pen-sized flashlight, see penlight.
Photo of the Hypertext Editing System (HES) console in use at Brown University, circa October 1969. The photo shows HES on an IBM 2250 Mod 4 display station, including lightpen and programmed function keyboard, channel coupled to Brown's IBM 360 mainframe.
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[1]).
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.
^Cite error: The named reference Slashphone_2006 was invoked but never defined (see the help page).
A lightpen 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...
match, or by using a pen-based computer interface to track the movements of the tip of the pen as the user is writing. A lightpen is a computer input...
Trackball pens use a sensor that is located on the pen to detect the motion of the trackball. Active pen Apple Pencil Digital paper Bluetooth Lightpen List...
PEN America (formerly PEN American Center), founded in 1922, and headquartered in New York City, is a nonprofit organization whose goal is to raise awareness...
digital synthesizer using two 8-bit Motorola 6800 microprocessors, and the lightpen and some of the graphics that would later become part of the Fairlight...
ballpoint pen, also known as a biro (British English), ball pen (Hong Kong, Pakistani, Indian and Philippine English), or dot pen (Nepali English), is a pen that...
interfaces. A lightpen could be used to draw sketches on the computer using Ivan Sutherland's revolutionary Sketchpad software. Using a lightpen, Sketchpad...
variety of joysticks and other devices, most commonly paddle controllers, lightpens and computer mice. The standard was so engrained that it led to devices...
console operator is the IBM 3066 Model 2 system console, which included a lightpen[citation needed] as an interface device. Other then-new features were:...
peripherals included a pair of 3D goggles known as the "3D Imager" and a lightpen for drawing directly on the screen. The Asteroids-inspired Mine Storm...
screen with the recently invented lightpen, which relayed information on its position by computing at what time the light from the scanning Cathode-ray tube...
of the FT's light meter was a dimmer viewfinder. The Pen FV was essentially a Pen FT with the light meter deleted and the F's brighter viewfinder reinstated...
cursor moves on the display. A lightpen is a device similar to a touch screen, but uses a special light-sensitive pen instead of the finger, which allows...
A pen name is a pseudonym (or, in some cases, a variant form of a real name) adopted by an author and printed on the title page or by-line of their works...
of the modern touchscreen includes stylus based systems. 1946 DIRECT LIGHTPEN - A patent was filed by Philco Company for a stylus designed for sports...
A marker pen, fine liner, marking pen, felt-tip pen, felt pen, flow marker, sign pen (in South Korea), vivid (in New Zealand), flomaster (in Russia),...
Pen computing refers to any computer user-interface using a pen or stylus and tablet, over input devices such as a keyboard or a mouse. Pen computing...
monitor, or a TV with an RF modulator. The original 1000 and SX has a light-pen port. Unlike most PC clones, several Tandy 1000 computers have MS-DOS...
based on a magnetic card and an electronic ballot marking device with a lightpen. In 1994 the electronic voting experiment was extended to around 22% of...
the user's finger, pen, or other pointer over the image projected on the whiteboard is captured by its interference with infrared light at the surface of...
Vincent Joguin's Disk2FDI) Lightpen (on MDA, HGC, CGA and EGA PC-compatible graphics cards the sensor of an optional lightpen could be read in a fashion...
measured 21" diagonal, but the useful display area was 12 inch by 12 inch. A lightpen was provided as a pointing device, serving the function of the modern...
Brown University. It was implemented using the terminal IBM 2250 with a lightpen which was provided as a pointing device. By 1976, its successor FRESS...
interface circuitry, serial I/O input, and input from peripherals such as a lightpen. There are also seven 8-bit I/O ports available for decoding and interfacing...
often used on sample and hold displays such as LCDs to substitute for the lightpen, which can only work on CRTs. Integrated display LUT and 3D LUT tables...
global volume setting) on-chip DMA two 8-bit analog-to-digital converter lightpen support Unlike many other video circuits of the era, it does not offer...
held as the first graphical computer-aided design program. It used a lightpen to create and manipulate objects in engineering drawings in realtime with...
Global Information