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2. Optoma - Wikipedia

   en.wikipedia.org/wiki/Optoma

   With 8% of global market share, the Optoma brand in 2011 was the second largest projector brand, behind the Japanese company Epson. There are two specifications of projectors: a liquid-crystal display (LCD) projector that Epson makes and a Digital Light Processing (DLP) projector using chipsets Texas Instruments that Optoma makes. [1]

3. Fractus Learning Launches Ultimate Classroom Guide to ...

   lite.aol.com/tech/story/0022/20241021/9259275.htm

   Fractus Learning has rolled out an updated guide to help educators choose the right classroom projectors for the 2024-25 school year. Wade Gegan, the author, put together reviews of twelve highly-rated projectors to help schools find the best match for their unique needs.

4. LCD projector - Wikipedia

   en.wikipedia.org/wiki/LCD_projector

   Epson owns the technology and has branded it as "3LCD". To market 3LCD projector technology, Epson also set up a consortium called the "3LCD Group" in 2005 with other projector manufacturer licensees of 3LCD technology that use it in their projector models. Early LCD systems were used with existing overhead projectors.

5. Projector - Wikipedia

   en.wikipedia.org/wiki/Projector

   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 .

6. Interactive whiteboard - Wikipedia

   en.wikipedia.org/wiki/Interactive_whiteboard

   Projector/Laser light curtain – A dual infrared laser device is positioned in the top middle area of a flat surface. The laser beam sweeps across the surface creating an invisible curtain. The projector, usually an ultra short throw projector) has a built in camera with an infrared filter that scans the projected area.

7. Overhead projector - Wikipedia

   en.wikipedia.org/wiki/Overhead_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.