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ViewSonic Corporation is an American privately held multinational electronics company with headquarters in Brea, California, United States. The company was founded in 1987 as Keypoint Technology Corporation by James Chu and was renamed to its present name in 1993, after a brand name of monitors launched in 1990.
A projector in a standard form factor: The PG-D2870 projector from Sharp, which uses Digital Light Processing technology An image from a video projector in a home cinema. A video projector is an image projector that receives a video signal and projects the corresponding image onto a projection screen using a lens system.
A projector or image projector is an optical device that projects an image (or moving images) onto a surface, commonly a projection screen. 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 .
Its primary products are projectors and digital image processing equipment. Founded in 2002, it is a subsidiary of the Taiwanese electronics and manufacturing company Coretronic. It was listed on the Taiwan Stock Exchange in 2007. With 8% of the projector global market share in 2011, the Optoma brand was the second largest projector brand ...
Epson developed the 3LCD projection technology in the 1980s, and licensed it for use in projectors in 1988. [56] Epson's VPJ-700, released in January 1989, was the world's first compact , full-color LCD projector .
In contrast, a modern LCD or DLP projector often uses an Ultra-high-performance lamp which has a higher luminous efficacy and lasts for thousands of hours. [5] A drawback of that technology is the warm up time required for such lamps. Older overhead projectors used a tubular quartz bulb which was mounted above a bowl-shaped polished reflector.
The resolution 3840 × 2160, sometimes referred to as 4K UHD or 4K × 2K, has a 16:9 aspect ratio and 8,294,400 pixels. It is double the size of Full HD ( 1920 × 1080 ) in both dimensions for a total of four times as many pixels, and triple the size of HD ( 1280 × 720 ) in both dimensions for a total of nine times as many pixels.
Burn-in on a monitor, when severe as in this "please wait" message, is visible even when the monitor is switched off. Screen burn-in, image burn-in, ghost image, or shadow image, is a permanent discoloration of areas on an electronic visual display such as a cathode-ray tube (CRT) in an older computer monitor or television set.
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