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At about the same time, the German company "Bonner Ingenieurbüro für Optoelektronik CrystalVision" started experimenting with LCD projection devices from 1985 onwards. Although traditional slide projectors already used infrared filters to reduce heating of the photographic slides, LCDs are much more sensitive to overheating. When the ...
The roots of Seiko Epson Corporation go back to a company called Daiwa Kogyo, Ltd. which was founded in May 1942 [5] by Hisao Yamazaki, a local clock shop owner and former employee of K. Hattori, in Suwa, Nagano.
Video projectors can have a mechanism similar to local backlight dimming to achieve higher contrast ratios by using 6 DLP chips: 3 for display, and 3 for local dimming. [11] [12] A few camcorders have a built-in projector suitable to make a small projection; a few more powerful "pico projectors" are pocket-sized, and many projectors are portable.
Most projectors create an image by shining a light through a small transparent lens, but some newer types of projectors can project the image directly, by using lasers. A virtual retinal display , or retinal projector, is a projector that projects an image directly on the retina instead of using an external projection screen.
Optoma's primary products are projectors and digital image processing equipment. [5] For a 2002 SIGUCCS conference, the scholar Mike Honeycutt wrote, "Optoma is not generally considered a first-tier vendor of data projectors but the features of their data projectors are comparable to better-known brands at a cheaper price."
Three types of projection systems are used in projection TVs. CRT rear-projection TVs were the earliest, and while they were the first to exceed 40", they were also bulky and the picture was unclear at close range. Newer technologies include DLP (reflective micromirror chip), LCD projectors, Laser TV and LCoS.