Light transmitting plate

Details Light transmitting plate Light transmitting plate

2005-03-22

2005-03-22

Tso, Laura K. (Department: 2875)

Illumination

Revolving

Reexamination Certificate

active

06869197

ABSTRACT:
The present invention provides a light transmitting plate formed by injecting melted transparent resin into a mold having a pattern on at least one surface of a cavity, wherein the light transmitting plate has a diagonal dimension from 14 inches to 30 inches, a pattern for reflection or diffusion of light on at least one surface, a birefringence value of 9×10−6or less in the thickness direction, and the variation in the birefringence values is within ±3×10−6from the average. The pattern of the present light transmitting plate is transferred from the pattern on the surface of the cavity at a transfer ratio of 90% or more, and the variation in the transfer ratios is within ±2% from the average. The light transmitting plate of the present invention has a reduced molding strain and hence a low birefringence value, and uniform distribution of the birefringence values and is obtained with low production cost because of the omission of printing process.

REFERENCES:
patent: 5886759 (1999-03-01), Mashino et al.
patent: 6-210685 (1994-08-01), None
patent: 11-309761 (1999-11-01), None
S.N. 09/840,270 to Y. Nishigaki filed Apr. 24, 2001.

Affiliated with

Also associated with

Rating

Light transmitting plate does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3458046