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US 10,948,650 B2Granted
Display including turning film and diffuser
Assignee3M Innovative Properties Company
InventorNicholas A. Johnson
Life of this patent
Estimating the term…
Abstract
Displays having a viewing area are described. In particular, displays including a lightguide, a turning film, a liquid crystal module including two polarizers, and a diffuser disposed proximate the top polarizer are described. Light extracted from the lightguide and emitted through the viewing area is specularly transmitted between the planar side of the turning film and the bottom absorbing polarizer. Displays that may be useful as switchable displays are described.
Claims17
A display having a viewing area, comprising:
- a lightguide;
- a turning film disposed proximate the lightguide having a prism side and a planar side, the prism side facing the lightguide, and the prism side including a plurality of microstructures;
- a liquid crystal module disposed proximate the turning film, the liquid crystal module including a bottom absorbing polarizer and a top absorbing polarizer, the liquid crystal module oriented such that the bottom absorbing polarizer is proximate the turning film;
- and
- a diffuser disposed proximate the top absorbing polarizer, the diffuser being non-integral with the top absorbing polarizer;
- wherein light extracted from the lightguide and emitted through the viewing area is specularly transmitted between the planar side of the turning film and the bottom absorbing polarizer;
- and
- wherein the turning film is laminated or adhered to the bottom absorbing polarizer.
5 more elements
A display having a viewing area, comprising:
- a lightguide;
- a turning film disposed proximate the lightguide having a prism side and a planar side, the prism side facing the lightguide, and the prism side including a plurality of microstructures, at least two of the plurality of microstructures having different rotational orientations relative to the turning film;
- a liquid crystal module disposed proximate the turning film, the liquid crystal module including a bottom absorbing polarizer and a top absorbing polarizer, the liquid crystal module oriented such that the bottom absorbing polarizer is proximate the turning film;
- and
- a diffuser disposed proximate the top absorbing polarizer, the diffuser being non-integral with the top absorbing polarizer;
- wherein light extracted from the lightguide and emitted through the viewing area is specularly transmitted between the lightguide and the prism side of the turning film;
- wherein the turning film is laminated or adhered to the bottom absorbing polarizer;
- and wherein the planar side of the turning film is optically smooth.
5 more elements
Dependencies are inferred from the claim text.