Method of preparation of substrates for liquid crystal display devices
First Claim
1. In the method for the preparation of an electrode substrate for use in a liquid display device utilizing perpendicular alignment of liquid crystal and dichroic dye molecules, the improvement wherein a base substrate bearing an electrode film is coated with an insulating film on the surface which contacts the liquid crystal, rubbing the insulating film with cloth in a fixed direction and, following the rubbing treatment, treating the rubbed surface with a silane surfactant so that when the electrode substrate is employed in a liquid crystal display device the liquid crystal and dye molecules are arranged in the direction of the major axes thereof in substantially perpendicular orientation at constant tilt angles greater than 0°
- but less than 5°
in the same direction on the interface with said electrode substrate.
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Abstract
A method is provided for the preparation of an electrode substrate for use in a liquid display device utilizing perpendicular alignment of liquid crystal and dichroic dye molecules. In the improved method, a base substrate bearing an electrode film is coated with an insulating film on the surface which contacts the liquid crystal. The insulating film is rubbed with cloth in a fixed direction and following the rubbing treatment, the rubbed surface is treated with a silane surfactant so that when the electrode substrate is employed in a liquid crystal display device, the liquid crystal and dye molecules are arranged in the direction of the major axes thereof in substantially perpendicular orientation at constant tilt angles in the same direction on the interface with said electrode substrate.
36 Citations
4 Claims
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1. In the method for the preparation of an electrode substrate for use in a liquid display device utilizing perpendicular alignment of liquid crystal and dichroic dye molecules, the improvement wherein a base substrate bearing an electrode film is coated with an insulating film on the surface which contacts the liquid crystal, rubbing the insulating film with cloth in a fixed direction and, following the rubbing treatment, treating the rubbed surface with a silane surfactant so that when the electrode substrate is employed in a liquid crystal display device the liquid crystal and dye molecules are arranged in the direction of the major axes thereof in substantially perpendicular orientation at constant tilt angles greater than 0°
- but less than 5°
in the same direction on the interface with said electrode substrate. - View Dependent Claims (2, 3, 4)
- but less than 5°
Specification
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- Resources
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Current AssigneeMatsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
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Original AssigneeMatsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
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InventorsKawarada, Hiroshi, Tatsumichi, Toshio
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Primary Examiner(s)Morgenstern, Norman
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Assistant Examiner(s)Bueker, Richard
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Application NumberUS06/266,053Time in Patent Office838 DaysField of Search427/58, 427/126.3, 427/355, 427/407.1, 427/343, 427/344, 427/299, 427/322, 427/108, 428/1US Class Current427/126.3CPC Class CodesC09K 2323/061 Inorganic, e.g. ceramic, me...G02F 1/133345 Insulating layers G02F1/133...G02F 1/133719 with coupling agent molecul...
