Abstract According to the invention there is provided a liquid crystal display device comprising a pair of parallel, transparent plates with associated electrode configurations and between which there is enclosed a liquid crystal layer by means of a gasket or seal around the edges of the plates. The construction of the seal is such that it provides a flexible joining of the plates with a bellows-like effect. The seal comprises inner and outer portions which are hermetically sealed to the respective plates and are joined by way of a flexible transition portion, the extension of the respective plates corresponding to the adjacent inner and outer portions of the seal. The seal, together with a number of wafers for the sealing of lead-in holes for electrical connection to external leads, are secured to the plates by means of a special method which according to the invention comprises a combination of heat, ultrasound and mechanical pressure under the influence of an electric voltage.
In a liquid crystal display device, comprising a liquid crystal layer enclosed between a pair of parallel transparent plates by means of a seal along the plate edges with the plate surfaces facing the liquid crystal layer being provided with respective electrode configurations in the form of a number of elements electrically connected to external leads for selectively applying an electric voltage so that corresponding parts of the liquid crystal are activated for display of symbols, the seal comprises inner and outer portions which are joined by way of a flexible transition portion and are hermetically secured to the border areas of the respective plates, the size of the respective plates corresponding essentially to the size of the adjacent inner and outer portion of the seal, and at least one transparent plate defines a plurality of holes provided for the external leads which holes are sealed by means of electrically conducting wafers placed between the plates over the respective holes.
Claim 2
Dependent Claim
160 words
In a liquid crystal display device, comprising a liquid crystal layer enclosed between a pair of parallel transparent plates by means of a seal along the plate edges with the plate surfaces facing the liquid crystal layer being provided with respective electrode configurations in the form of a number of elements electrically connected to external leads for selectively applying an electric voltage so that corresponding parts of the liquid crystal are activated for display of symbols, the seal comprises inner and outer portions which are joined by way of a flexible transition portion and are hermetically secured to the border areas of the respective plates, the size of the respective plates corresponding essentially to the size of the adjacent inner and outer portion of the seal, and at least one transparent plate defines a plurality of holes provided for the external leads which holes are sealed by means of electrically conducting wafers placed between the plates over the respective holes.
Claim 3
Dependent Claim
23 words
The display deviCe according to claim 1, wherein the seal consists of aluminum foil with a degree of fineness better than 99.99 percent.
Claim 4
Dependent Claim
15 words
The display device according to claim 1, wherein the walls of said holes are metallized.
Claim 5
Dependent Claim
18 words
The display device of claim 1, wherein the wafers have the same thickness as the inner seal portion.