Back to results
US 4,037,927 AGranted
Liquid crystal display screen with multiple electrode arrangement
AssigneeSiemens Aktiengesellschaft
InventorHans Krueger
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeSiemens Aktiengesellschaft
InventorHans Krueger
Estimating the term…
A liquid crystal display screen having a liquid crystal layer disposed between a pair of carrier plates to form a liquid crystal cell characterized in a plurality of electrode layers disposed between the carrier plates with adjacent electrode layers being separated by an insulating layer and selected electrode layers being in the shape of characters or digits and being energized to form displays of different characters or digits. In one embodiment, a digit electrode layer is applied on opposite faces of the liquid crystal layer and a continuous electrode is separated by an insulating layer from each of the additional electrode layers. In a second embodiment, the liquid crystal layer is disposed between a continuous electrode layer and more than two digit electrode layers with the outermost digit electrode layer being continuous whereas the inner digit electrodes have interrupted conducting surfaces. In the third embodiment, a color filter such as a three-color triplet having the colors arranged in strips is disposed between the carrier plates, the continuous electrode is formed by three electrode layers separated by insulating layers with each layer having strips of electrodes overlying the strips of a specific color so by selecting the energizing of various electrodes, a character of one color can be produced.
In a liquid crystal display screen which may be operated to separately display in time sequence at least two digits, said screen comprising a liquid crystal cell having two transparent carrier plates with a liquid crystal layer disposed therebetween, the improvement comprising a continuous, transparent electrical conductive layer disposed adjacent one of the two carrier plates and having a shape of a first digit and being provided with an electrical lead;
In a liquid crystal display screen which may be operated to separately display in time sequence at least two digits, said screen comprising a liquid crystal cell having two transparent carrier plates with a liquid crystal layer disposed therebetween, the improvement comprising a continuous, transparent electrical conductive layer disposed adjacent one of the two carrier plates and having the shape of a first digit, said layer being provided with an electrical lead, at least one additional digit panel having an electrical conducting layer having an electrical lead and delimiting a second digit, each of said additional digit panels being positioned between the layer forming the first digit and the liquid crystal layer with an insulating layer disposed between adjacent conductive layers, a color strip layer with a plurality of successive red-green-blue color strip triplets disposed in the cell adjacent the other of the two carrier plates, three comb-like electrode strip layers disposed between the color strip layer and the liquid crystal layer with an insulating layer disposed between adjacent electrode strip layers, said electrode strip layer being arranged so that the comb-like electrodes of each electrode strip layer coincides with all of the colored strips of a separate one of the three colors of the color strip layer so that by selectively energizing selected electrode strip layers and a selected digit layer a colored presentation of the digit will occur.
Dependencies are inferred from the claim text.