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VISUAL DISPLAYS

VISUAL DISPLAYS. By: Kem Okonkwo Regina Leaks. Definition. Visual Display: Visualization is any technique for creating images, diagrams or animation to communicate a message. Visualization through visual imagery has been an effect way to communicate both abstract and concrete ideas. HISTORY.

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VISUAL DISPLAYS

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  1. VISUAL DISPLAYS By: Kem Okonkwo Regina Leaks

  2. Definition • Visual Display: Visualization is any technique for creating images, diagrams or animation to communicate a message. • Visualization through visual imagery has been an effect way to communicate both abstract and concrete ideas.

  3. HISTORY • Early known European cave paintings date to 32,000 years ago. Purpose of cave painting is not known. • Theories describe cave painting as a way of transmitting information and for religious and ceremonial purposes.

  4. HIEROGLYPHS • Formal writing system used by the ancient Egyptians. They contained a combination of logographic and alphabetic elements. • Circa 3200 BC, earliest known hieroglyphic inscription.

  5. Examples of Visual Display Today • Examples include screens on ATMs, ticket vending machines and information kiosks, and information displays in stations and airports. • Others include: Plasma, LCD, digital camera, traffic lights and much more.

  6. Imagine Graphics (UK) Airport Flight Status Board

  7. Air Traffic Control Tower Display

  8. Features of LCD TV • 1366 x 768 resolution. • 16:9 widescreen • 1000:1 contrast ratio • HDMI, Component video and VGA inputs. • Some come with 2 or more built in speakers.

  9. Advantage of LCD • No burn-in of static images. • Cooler running temperature. • Increased image brightness. • Longer display life (60,000 hrs) • Lighter weight.

  10. Disadvantage of LCD • Lower contrast ratio. • Not as good at tracking motion. • More expensive. • Not as common in larger screen sizes above 42”.

  11. Plasma Television: The very first prototype for a plasma display monitor was invented in 1964 by Donald Bitzer, Gene Slottow, and Robert Willson. 

  12. Features of a Plasma TV. • 1365 x 768 resolution. • 16:9 widescreen. • 8000:1 contrast ratio. • 1000 cd/m2 brightness.

  13. Advantages of a Plasma TV • Larger screen size availability. • Better contrast ratio. • Better color accuracy. • Better motion tracking.

  14. Disadvantage of a Plasma TV • More susceptible to burn-in if static images. • Generate more heat. • Do not perform as well at higher altitude . • Shorter display life span (30,000 hrs)

  15. The very first traffic light was a revolving gas lantern with red and green lights installed in a London intersection in 1868. A later version of the traffic light based on railroad signals was installed in Detroit, Michigan, in 1920. • Garrett Augustus Morgan to thank for the modern version and first patent of this traffic-stopping invention.

  16. Format of Display Text • Legibility: Text should be displayed using high contrast color combinations. • Blocks: showing blocks of text on an information board for a few second is much easier to read • Size: Adjustment of size is necessary, with good proportion with clear character shape. • No Flicker: Add-on assistive devices shouldn’t cause screen to flicker with a frequency > than 2 Hz and lower than 55 Hz.

  17. Navigating the Machine • Visual instructions on the screen are the main guide for the user. • Choice of pictograms and icons should be considered carefully. • The moving components should be compatible with the direction of movement that occurs naturally e.g. 'up' results in an upward movement and increase in numerical value.

  18. Use of Color • Often used to highlight or code information. No more than five colors should be used in any display. • Bright colors can produce glare, which might distract the user and cause the eyes to become tired. • Color Blindness is more common in males than in females. Therefore excessive use of color can also be distracting.

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