Sawtooth shaped front screen

Details Sawtooth shaped front screen Sawtooth shaped front screen

1975-07-10

1977-03-15

Wintercorn, Richard A.

350106, 350109, 350167, G03B 2160

Patent

active

040121151

ABSTRACT:
A transparent front projection screen is disclosed having a plurality of ridges on the back thereof interrupted by flat portions and a plurality of curved sawtooth shaped ridges on the front thereof. The back ridges serve as a prism like element for reflecting the light by internal reflection which is incident thereon from predetermined directions. The flat surfaces on the back of the screen pass light incident from certain undesired directions. The sawtooth shaped ridges on the front of the screen serve as elements for developing a vertical spread of light but eliminates front face reflection problems.
The disclosure also teaches the proper location of a projector when used with a transparent front projection screen as described above.

REFERENCES:
patent: 3782805 (1974-01-01), Brown
patent: 3846012 (1974-11-01), Brown
patent: 3893748 (1975-07-01), DePalma et al.

Affiliated with

Also associated with

Rating

Sawtooth shaped front screen does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sawtooth shaped front screen, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sawtooth shaped front screen will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-422657