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  2. Projection screen - Wikipedia

    en.wikipedia.org/wiki/Projection_screen

    Switchable projection screens can be switched between opaque and clear. In the opaque state, projected image on the screen can be viewed from both sides. It is very good for advertising on store windows. Inflatable movie screen. Mobile screens usually use either a pull-down screen on a free stand, or pull up from a weighted base.

  3. Overhead projector - Wikipedia

    en.wikipedia.org/wiki/Overhead_projector

    An overhead projector works on the same principle as a slide projector, in which a focusing lens projects light from an illuminated slide onto a projection screen where a real image is formed. However some differences are necessitated by the much larger size of the transparencies used (generally the size of a printed page), and the requirement ...

  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

    A projector's throw ratio is used when installing projectors to control the size of the projected display. [1] For example, if the throw ratio is 2:1 and the projector is fourteen feet away from the screen, then the display width will be seven feet.

  6. Digital signage - Wikipedia

    en.wikipedia.org/wiki/Digital_signage

    Digital signage on the side of a building reports stock prices. Dow Jones News Ticker, Times Square Digital signage is a segment of electronic signage.Digital displays use technologies such as LCD, LED, OLED, projection and e-paper to display digital images, video, web pages, weather data, restaurant menus, or text.

  7. Folding screen - Wikipedia

    en.wikipedia.org/wiki/Folding_screen

    A folding screen, also known as pingfeng (Chinese: 屏風; pinyin: píngfēng), is a type of free-standing furniture consisting of several frames or panels, which are often connected by hinges or by other means. They have practical and decorative uses, and can be made in a variety of designs with different kinds of materials.