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2. Handheld projector - Wikipedia

   en.wikipedia.org/wiki/Handheld_projector

   21st century mobile phones have the ability to store thousands of photos and can take photos of good quality. Projector phones allow sharing them with a larger audience than on the phone's small screen. [5] One study found that people preferred to view and share photos with projector phones, compared to using conventional mobile phones. [6]

3. Projection screen - Wikipedia

   en.wikipedia.org/wiki/Projection_screen

   Although a projection screen cannot improve a projector's contrast level, the perceived contrast can be boosted. In an optimal viewing room, the projection screen is reflective, whereas the surroundings are not. The ambient light level is related to the overall reflectivity of the screen, as well as that of the surroundings.

4. 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. A virtual retinal display, or retinal ...

5. LCD projector - Wikipedia

   en.wikipedia.org/wiki/LCD_projector

   Because they use small lamps and the ability to project an image on any flat surface, LCD projectors tend to be smaller and more portable than some other types of projection systems. Even so, the best image quality is found using a blank white, grey, or black [ citation needed ] (which blocks reflected ambient light) surface, so dedicated ...

6. Liquid-crystal display - Wikipedia

   en.wikipedia.org/wiki/Liquid-crystal_display

   Small LCD screens are common in LCD projectors and portable consumer devices such as digital cameras, watches, calculators, and mobile telephones, including smartphones. LCD screens have replaced heavy, bulky and less energy-efficient cathode-ray tube (CRT) displays in nearly all applications since the late 2000s to the early 2010s.

7. Rear-projection television - Wikipedia

   en.wikipedia.org/wiki/Rear-projection_television

   A projection television uses a projector to create a small image or video from a video signal and magnify this image onto a viewable screen. The projector uses a bright beam of light and a lens system to project the image to a much larger size. A front-projection television uses a projector that is separate from the screen and the projector is ...