Method of making color-neutral LCD indicators of low residual tr

Details Method of making color-neutral LCD indicators of low residual tr Method of making color-neutral LCD indicators of low residual tr

1983-09-26

1985-09-17

Corbin, John K.

350349, G02F 1133, G02F 1137

Patent

active

045416931

ABSTRACT:
The disturbing residual transmission of a liquid crystal display device which is particularly noticeable in negative contrast devices is reduced by reference to the fact that the residual transmission is colored. The entire display surface of the liquid crystal device is provided with a transparent covering of a color complementary to the residual transmission color when the liquid crystal is not turned on. The transparent colored covering can be applied by printing as well as otherwise. In another embodiment, color shifts between turned-on and not turned-on displays are counteracted by mixing into the liquid crystal material a dichroic coloring material which has much lower absorption when the display is turned on. A light blue dichroic coloring material is suitable for LCDs which have residual transmission in the red region.

REFERENCES:
patent: 3551026 (1970-12-01), Heilmeier
patent: 4035060 (1977-07-01), Tsunoda et al.
patent: 4241339 (1980-12-01), Ushiyama
patent: 4257682 (1981-03-01), Suzuki et al.

Affiliated with

Also associated with

Rating

Method of making color-neutral LCD indicators of low residual tr does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of making color-neutral LCD indicators of low residual tr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making color-neutral LCD indicators of low residual tr will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-367416