Projection screen having high resolution and good mechanical stability
AssigneeNorth American Philips Corporation
InventorsThomas S. McKechnie, Jill F. Goldenberg
Life of this patent
Estimating the term…
Abstract
A screen consists of a clear mechanically stable substrate and a bulk diffuser portion which is as close to the front lenticules as possible. The diffuser may be dispersed within the lenticules or in a separate area immediately adjacent to them. The screen may be a two element screen, either the front or the rear element having the clear substrate. Surface diffusion may be used as an alternative, or in addition to, the bulk diffuser.
Claims21
Projection screen comprising:
- a mechanically stable front element having a predetermined thickness in a first predetermined direction and comprising a plurality of lenticules, bulk diffuser particles disposed within a first predetermined distance of said lenticules in said first predetermined direction, and a clear substrate for maintaining mechanical stability of said screen and having a substrate thickness substantially exceeding said predetermined distance, in mechanical contact with said lenticules;
- and
- a rear element in mechanical contact with at least part of said clear substrate, said rear element having a lens structure thereon.
A projection screen comprising
- a mechanically stable transparent substrate;
- and
- a thin diffusion and lenticular portion mechanically and optically connected to said transparent substrate, whereby the resolution of said screen is increased without loss of mechanical stability.
A projection screen for displaying a picture viewed by an audience, comprising
- a lenticular and diffusion element having a first side for displaying said picture to said audience and a second side extending substantially parallel to said first side, the distance between said first side and said second side constituting the thickness of said lenticular and diffusion element;
- and
- a mechanically stable rear element having a front surface adjacent said second side of said lenticular and diffusing element, and a rear surface separated from said front surface by a predetermined thickness.
A projection screen comprising
- a thin lenticular element for displaying a picture to an audience;
- and
- a mechanically stable rear element having a front diffusing surface adjacent said lenticular element;
- and
- means for preventing movement between said lenticular element and said rear element.
Dependencies are inferred from the claim text.