Difference between revisions of "Lightfield display"
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| − | A '''light field display''' is a display that can display a [[light field]], which is light that a person can focus naturally on at a range of distances in the image. Light field displays can be made to be near the eye or fixed in the world: Either [[world-fixed lightfield display]] or [[ | + | A '''light field display''' is a display that can display a [[light field]], which is light that a person can focus naturally on at a range of distances in the image. Light field displays can be made to be near the eye or fixed in the world: Either [[world-fixed lightfield display]] or [[near eye lightfield display]]. |
The light reaches the viewer from multiple angles at a single viewpoint. | The light reaches the viewer from multiple angles at a single viewpoint. | ||
Revision as of 07:26, 21 July 2024
A light field display is a display that can display a light field, which is light that a person can focus naturally on at a range of distances in the image. Light field displays can be made to be near the eye or fixed in the world: Either world-fixed lightfield display or near eye lightfield display.
The light reaches the viewer from multiple angles at a single viewpoint.
Lightfield displays have been made in a variety of types, including microlens-based, sequential projection, and stacked LCD. An example of a sequential projection display is from CREAL.
A sequential light field display is a display that generates rays one by one, or in groups one after another, and displays to the eye in rapid succession.
A simultaneous light field display is one that displays all of the light all at once.
A light field display that is to solve most vergence-accommodation conflicts needs to display multiple views for each pupil which can theoretically be done using a high angular resolution backlight.[1]
Microlens-based
- 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.[2] This can be done by taking a laptop computer and putting a microlens sheet in front of it.
Manufacturing
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.
To manufacture near-eye microlens array-based LFDs, it is recommended to use a large panel of high PPI. The display panel size is recommended to be about 2.5 inches square, with a PPI of over 2000. This results in a recommended resolution of 5000x5000 per eye.
Instead of using high-PPI displays, it is also feasible 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.