Display system incorporating a liquid crystal
AssigneeSiemens Aktiengesellschaft
InventorsManfred Kobale, Hans Krueger, Hans-Peter Lorenz
Life of this patent
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Abstract
A liquid crystal type display system containing a liquid crystal layer with positive dielectric anisotropy located between two carrier plates whose mutually opposite surfaces each have an electrode coating as well as an insulation layer which has been vaporized on obliquely. A rotating display cell with obliquely vaporized-on layers is provided by choosing the vapor deposition angle for one of these layers in excess of about 75.degree. and for the other layer less than about 65.degree. and positioning the carrier plates in spaced relationship to one another without any substantial rotating of one plate relative to the other thereof.
Claims23
An improved display system comprising:
- a. a pair of spaced generally parallel carrier plates at least one of which is light transmissive,
- b. a pair of light transmissive electrode coatings, each one being associated with a different one respective inner adjacent opposed surface portion of one of said carrier plates,
- c. a pair of light transmissive, electrically insulative coatings, each one being associated with a different one respective inner adjacent opposed surface portion of one of said carrier plates and located over its adjacent said electrode coating, each one of said insulative coatings having been vapor deposited at an oblique angle, one of said insulative coatings having been so deposited at an angle in excess of about 75.degree., the other of said insulative coatings having been so deposited at an angle less than about 65.degree.,
- d. mounting means sealing said carrier plates together in fixed relationship to one another and cooperating to define therebetween a chamber,
- e. a liquid crystal layer in said chamber, said liquid crystal layer having positive dielectric anisotropy,
- f. said insulative coating orientating the neighboring molecules substantially parallel to said plates, the direction of orientation at one of said plates being substantially vertical to the direction of orientation at the other of said plates,
- g. a pair of electrical leads, each one being electrically associated with a different one of said electrode coatings and extending into the environment from said chamber.
A pair of light transmissive glass carrier plates at least one of which is light transmissive, each said plate having a portion of one face thereof coated with a light transmissive electrode coating, one of said electrode coatings being segmented in a predetermined manner, each so electrode coated plate face further being coated with a different light transmissive, electrically insulative coating, one of said insulative coatings having been vapor deposited at a vapor deposition angle in excess of about 75.degree., the other of said insulative coatings having been vapor deposited at a vapor deposition angle less than about 65.degree..
A method for making a pair of coated carrier plates adapted for incorporation into a liquid crystal type display system comprising the steps of
- a. vapor paint first depositing on one face of each of a pair of carrier plates at least one of which is light transmissive with a light transmissive electrode coating one of said electrode coatings being segmented in a predetermined manner, and then
- b. secondly depositing by vapor deposition on each so coated face a light transmissive, electrically insulative coating, one of said insulative coatings being made at a deposition angle in excess of about 75.degree., the other of said insulative coatings being made at a deposition angle of less than about 65.degree..
Dependencies are inferred from the claim text.