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The laser printer was invented at Xerox PARC in the 1970s. Laser printers were introduced for the office and then home markets in subsequent years by IBM, Canon, Xerox, Apple, Hewlett-Packard and many others. Over the decades, quality and speed have increased as prices have decreased, and the once cutting-edge printing devices are now ubiquitous.
A widespread practical application is using quantum dot enhancement film (QDEF) layer to improve the LED backlighting in LCD TVs.Light from a blue LED backlight is converted by QDs to relatively pure red and green, so that this combination of blue, green and red light incurs less blue-green crosstalk and light absorption in the color filters after the LCD screen, thereby increasing useful ...
Laser types with distinct laser lines are shown above the wavelength bar, while below are shown lasers that can emit in a wavelength range. The height of the lines and bars gives an indication of the maximal power/pulse energy commercially available, while the color codifies the type of laser material (see the figure description for details).
HP categories of printers as of November 2014 are: Black and white laser printers; Color laser printers; Laser multifunction printers; Inkjet all-in-one printers; Specialty Photo inkjet printers; Business ink printers; Color inkjet printers; HP Designjet large format printers; HP Indigo Digital Presses; HP Inkjet Digital Web Press; HP latex ...
It is published by Wiley-VCH and contains reviews and original papers/letters. The journal was established in 2007 by the founding editor-in-chief Theodor W. Hänsch (Ludwig Maximilian University of Munich). Originally, the journal only published review articles. Since 2012, it also contains original papers and letters.
The print engine of most All-in-one devices is based either on a home desktop inkjet printer, or on a home desktop laser printer. They may be black-and-white or colour capable. Laser models provide a better result for text while inkjet gives a more convincing result for images and they are a cheaper multifunctional. [3]
It was partly motivated by a case in which the Equal Employment Opportunity Commission sued a law firm because equity partners were de-equitized when they reached age 65. Mostly, however, it was ...
Low to medium power laser diodes are used in laser pointers, laser printers and CD/DVD players. Laser diodes are also frequently used to optically pump other lasers with high efficiency. The highest-power industrial laser diodes, with power of up to 20 kW, are used in industry for cutting and welding. [75]