Persistence of Vision Displays
A class of display device described as "POV" is one that composes an image by displaying one spatial portion at a time in rapid succession (for example, one column of pixels every few milliseconds). A 2 dimensional POV display is often accomplished by means of rapidly moving a single row of LEDs along a linear or circular path. The effect is that the image is perceived as a whole by the viewer as long as the entire path is completed during the visual persistence time of the human eye. A further effect is often to give the illusion of the image floating in mid-air. A 3 dimensional POV display is often constructed using a 2D grid of LEDs which is swept or rotated through a volume. POV display devices can be used in combination with long camera exposures to produce light writing.
- Thaumatrope
- Phenakistoscope
- Zoetrope
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Famous quotes containing the words persistence, vision and/or displays:
“Extreme patience and persistence are required,
Yet everybody succeeds at this before being handed
The surprise box lunch of the rest of his life.”
—John Ashbery (b. 1927)
“For what we call illusions are often, in truth, a wider vision of past and present realities—a willing movement of a man’s soul with the larger sweep of the world’s forces—a movement towards a more assured end than the chances of a single life.”
—George Eliot [Mary Ann (or Marian)
“As boys without bonds to their fathers grow older and more desperate about their masculinity, they are in danger of forming gangs in which they strut their masculinity for one another, often overdo it, and sometimes turn to displays of fierce, macho bravado and even violence.”
—Frank Pittman (20th century)