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The Museum of Illusions refers to this type of mirror as an "antigravity mirror" because as it rotates once around the line-of-sight axis, the reflected image rotates twice, appearing upside-down when the joint is horizontal. Another type of non-reversing mirror can be made by making the mirror concave (curved inward like a bowl).
Operated through a small lever, the mirror can direct the light at right angles into a viewing piece when actuated "up" or free the light from the telescope to pass into the CCD camera when it is flipped "down". [3] There are instances when a flip prism as an alternative to the flip mirror.
A point-of-sale display (POS display) is a specialised form of sales promotion that is found near, on, or next to a checkout counter (the "point of sale"). They are intended to draw the customers' attention to products, which may be new products, or on special offer, and are also used to promote special events, e.g. seasonal or holiday-time sales.
Fiber-optic display; Film-type patterned retarder; Flat Display Mounting Interface; Flat-panel display; Flexible display; Flexible organic light-emitting diode; Flicker (screen) Flicker-free; Flight information display system; Flight instruments; Flip-disc display; Focus-plus-context screen; Fog display; Forth Dimension Displays; Fourteen ...
A display device is an output device for presentation of information in visual [1] or tactile form (the latter used for example in tactile electronic displays for blind people). [2] When the input information that is supplied has an electrical signal the display is called an electronic display .
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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.
An electronic visual display is a display device that can display images, video, or text that is transmitted electronically. Electronic visual displays include television sets, computer monitors, and digital signage. They are ubiquitous in mobile computing applications like tablet computers, smartphones, and information appliances.