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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 ...
Sketchpad ran on the MIT Lincoln Laboratory TX-2 (1958) computer at the Massachusetts Institute of Technology (MIT), which had 64k of 36-bit words.The user drew on the computer monitor screen with the recently invented light pen, which relayed information on its position by computing at what time the light from the scanning cathode-ray tube screen is detected.
Livescribe is a paper-based computing platform that consists of a digital pen, digital paper, software applications, and developer tools.. Central to the Livescribe platform is the smartpen, a ballpoint pen with an embedded computer and digital audio recorder.
Red (635 nm), blueish violet (445 nm), and green (520 nm) laser pointers. A laser pointer or laser pen is a (typically battery-powered) handheld device that uses a laser diode to emit a narrow low-power visible laser beam (i.e. coherent light) to highlight something of interest with a small bright colored spot.
U.S. President Donald Trump throws a pen after he signed executive orders on the inauguration day of Trump's second Presidential term, inside Capital One Arena, in Washington, U.S. January 20, 2025.
To satisfy this demand, Edison invented the electric pen, which uses a perforating function inspired by the printing telegraph. Edison and his associate Charles Batchelor observed that as this device punctured the paper, a mark was left underneath by its chemical solution. Edison took advantage of this property and built the electric pen around it.
Boogie Board is a product line of paperless note taking tools, utilizing an LCD in conjunction with a stylus, finger, or other implement to replicate the functionality of pen and paper. Boogie Board was developed by Kent Displays Incorporated, based on research conducted at Kent State University .
The user interface for early telestrators required the user to draw on a TV screen with a light pen, whereas modern implementations are commonly controlled with a touch screen or a graphics tablet. The late NFL color commentator John Madden famously used a telestrator during football games for many years, boosting the device's popularity. [5]