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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 ...
Ultra-high-performance lamp. An ultra-high-performance lamp, often known by the Philips trademark UHP, is a high-pressure mercury arc lamp. [1] These were originally known as ultra-high-pressure lamps, [2] [3] because the internal pressure can rise to as much as 200 atmospheres when the lamp reaches its operating temperature.
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.
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.
Walmart was the largest United States grocery retailer in 2019, and 65 percent of Walmart's US$510.329 billion sales came from U.S. operations. [18] [19] Walmart was listed on the New York Stock Exchange in 1972. By 1988, it was the most profitable retailer in the U.S., [20] and it had become the largest in terms of revenue by October 1989. [21]
The use of eight bulbs (120 volts for 8 lamps equals 15 volts per lamp) gives each lamp the rated voltage for proper brightness. Later sets used nine bulbs on a string to increase the life of the bulbs by reducing the voltage each lamp received (120 volts divided by 9 lamps = 13 volts per bulb) but not significantly reducing the light output of ...
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- 1747 Olentangy River Rd, Columbus, OH · Directions · (614) 299-9425
