Telephone set line status display

Details Telephone set line status display Telephone set line status display

1985-03-19

1987-03-24

Dwyer, James L.

Telephonic communications

Substation or terminal circuitry

Visual signalling

379376, 340705, 340716, H04M 100

Patent

active

046530940

ABSTRACT:
An LCD is associated with each phone line. The LCD is powered by the system current in the phone line. When the phone (10) is in an "on-hook" condition, the LCD is energized and it displays a light image of a telephone in an on-hook condition on a solid dark background. When the phone (10) is in an off-hook condition the LCD is turned off causing its liquid crystal compound to become transparent. The LCD working displays a solid light color but an image of a handset appears on this background. This handset image is printed onto the back side of the front glass panel of the LCD in the region that appears as a dark background when the LCD is energized. When a ring is received by the line the LCD flashes back and forth between the two displays at a fast rate. When the line is "on-hold" the LCD flashes between the images at a slower rate.

REFERENCES:
patent: 4132860 (1979-01-01), Rasmussen
patent: 4228324 (1980-10-01), Rasmussen et al.
patent: 4323734 (1982-04-01), Kimzey
patent: 4352959 (1982-10-01), Warnecke et al.
patent: 4514920 (1985-05-01), Shafrir et al.

Affiliated with

Also associated with

Rating

Telephone set line status display does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Telephone set line status display, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telephone set line status display will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1359095