Light field display
A light field display is an electronic visual display that can show natural 3D visuals to the viewer. It displays a light field, which is light that a person can focus on naturally at a range of distances in the image. It is the most natural kind of 3D display, along with holographic displays.
It is largely the same as a multifocal display.
Light field displays can be made to be near the eye or fixed in the world: Either a near eye lightfield display or a world-fixed lightfield display.
The light reaches the viewer from multiple angles at a single viewpoint.
A simultaneous light field display is one that displays all of the light all at once. It uses a lens array. Lens-array based light field prototypes were created by Doug Lanman.
A basic display can be made by stacking two lenticular sheets perpendicularly.
It can be connected to a computer to display dynamic light field imagery and UI.
Sequential[edit]
A sequential light field display is a display that generates groups of rays at various focus distances one after another, and displays to the eye in rapid succession.
Sequential light field displays have been developed by Andrew Maimone and CREAL.
Microlens-based[edit]
- For detail about this topic, visit: Microlens-based light-field display
A light field display can be made by putting a microlens array in front of a traditional flat display.[1] This can be done by taking a laptop computer and putting a microlens sheet in front of it.
A world-fixed microlens or perpendicular lenticular sheet based display requires on the order of thousands to millions of different viewpoints if not using head tracking and view selection based on where the head is.
Manufacturing[edit]
A light field display must be lit. For example using high brightness LEDs. The LEDs can be a broad backlight, or they can be the individual pixels or subpixels themselves.
Instead of using high-PPI displays, it is possible to use fiber optic image conduits to transport light from a physically larger and high resolution display in a flexible way to a head-mounted apparatus, where microlensing can take place for light field generation.