LIQUID CRYSTAL DISPLAY DEVICE
First Claim
1. In a liquid crystal display device wherein liquid crystals in a cell formed of opposed glass plates rotate the plane of polarization of linearly polarized light through 90* in the absence of an electric field across said cell and which are nonrotatory in the presence of a sufficiently strong electric field, said cell having suitably disposed transparent conductive elements on the inner surfaces of said glass plates covering only part of said surfaces, said cell further having polarizer and analyzer members disposed with axes at right angles to each other exterior to either plate of said cell, the improvement wherein each of said polarizer and analyzer members comprises a polarizing film held firmly between inner and outer sheets of glass and said cell comprises the inner sheet of each of said polarizer and analyzer members.
0 Assignments
0 Petitions
Accused Products
Abstract
In a liquid crystal display device using liquid crystal material to rotate the plane of polarized light by 90* both the thickness and the loss of light by reflection are decreased by using one surface from each of a polarizer and an analyzer for forming a cell in which the liquid crystal material is confined. The reduction in thickness is particularly important where the cell must be minimized in thickness to make it suitable for inclusion in a restricted space such as in a wrist watch.
-
Citations
2 Claims
-
1. In a liquid crystal display device wherein liquid crystals in a cell formed of opposed glass plates rotate the plane of polarization of linearly polarized light through 90* in the absence of an electric field across said cell and which are nonrotatory in the presence of a sufficiently strong electric field, said cell having suitably disposed transparent conductive elements on the inner surfaces of said glass plates covering only part of said surfaces, said cell further having polarizer and analyzer members disposed with axes at right angles to each other exterior to either plate of said cell, the improvement wherein each of said polarizer and analyzer members comprises a polarizing film held firmly between inner and outer sheets of glass and said cell comprises the inner sheet of each of said polarizer and analyzer members.
-
2. The improvement as defined in claim 1 wherein a white light-scattering plate is disposed proximate the outer sheet of said analyzer member in a position such that light transmitted through said analyzer member impinges on said light-scattering plate.
Specification
-
- Resources
-
Current AssigneeKanemitsu Kubota
-
Original AssigneeKanemitsu Kubota
-
InventorsKubota, Kanemitsu
-
Primary Examiner(s)Bauer, Edward S.
-
Application NumberUS05/432,117Time in Patent Office419 DaysField of Search350/150,155,16LCUS Class Current349/96CPC Class CodesG02F 1/133528 PolarisersG04G 9/0035 constructional
