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2. Digital clock - Wikipedia

   en.wikipedia.org/wiki/Digital_clock

   Digital clocks typically use the 50 or 60 hertz oscillation of AC power or a 32,768 hertz crystal oscillator as in a quartz clock to keep time. Most digital clocks display the hour of the day in 24-hour format; in the United States and a few other countries, a commonly used hour sequence option is 12-hour format (with some indication of AM or PM).

3. Seven-segment display - Wikipedia

   en.wikipedia.org/wiki/Seven-segment_display

   For gasoline price totems and other large signs, electromechanical seven-segment displays made up of electromagnetically flipped light-reflecting segments are still commonly used. A precursor to the 7-segment display in the 1950s through the 1970s was the cold-cathode, neon-lamp-like nixie tube .

4. Jumbotron - Wikipedia

   en.wikipedia.org/wiki/Jumbotron

   Newer, LED-based large screens have resolutions that are an order of magnitude greater than the early JumboTron resolution at a fraction of the cost. For example, the much publicized center-hung video board in the Dallas Cowboys ' AT&T Stadium is 72 feet tall and 160 feet wide (22 m x 49 m), displaying HDTV at 1920 x 1080 resolution, 45 times ...

5. Display device - Wikipedia

   en.wikipedia.org/wiki/Display_device

   Digital clocks display changing numerals The common segment displays shown side by side: 7-segment, 9-segment, 14-segment and 16-segment displays. Some displays can show only digits or alphanumeric characters. They are called segment displays, because they are composed of several segments that switch on and off to give appearance of desired glyph.

6. Sony Dream Machine - Wikipedia

   en.wikipedia.org/wiki/Sony_Dream_Machine

   While the basic idea of the Dream Machine is simply a combination of an analog radio and a digital clock, actual display technology evolved with time, from mechanical Flip Page at introduction, to VFD (1970s - 80s), and eventually to more energy efficient LED / OLED (primarily 1990s onward). Certain later models were also capable of docking ...

7. A Miami art museum’s jumbo digital billboard is now live ...

   www.aol.com/miami-art-museum-jumbo-digital...

   A controversial digital billboard went live this week at the Pérez Art Museum Miami, offering the first look at the new advertising space on the city waterfront.