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US 6,888,583 B2Granted
Method and apparatus for adjusted DC offset potential in a liquid crystal display (LCD) device
AssigneeBrillian Corporation
InventorsKevin J. Ilcisin, Douglas J. McKnight
Life of this patent
Estimating the term…
Abstract
Methods and apparatus for adjusting or reducing intrinsic DC offset potential in a Liquid Crystal Display (LCD) are taught. The methods allow the upper and lower assemblies of the LCD device to be manufactured with selected materials while achieving adjusted or reduced intrinsic DC offset potential in the finished LCD device. The methods are especially useful for reflective LCD designs where it is not possible to build the LCD with symmetric assemblies.
Claims16
A liquid crystal display device, comprising:
- an upper electrode;
- a lower electrode;
- an alignment layer in contact with said upper electrode and an alignment layer in contact with said lower electrode to form an upper assembly and a lower assembly, respectively;
- and
- a liquid crystal material, disposed between the upper assembly and the lower assembly;
- wherein the upper assembly and the lower assembly are designed relative to each other, based on at least one surface potential measurement, to create a substantially predetermined surface potential difference between the upper assembly and the lower assembly;
- wherein at least one of said upper electrode and said lower electrode is treated such that a surface potential difference between the lower assembly and the upper assembly, is adjusted and an intrinsic DC offset potential is changed to be within a designed range.
4 more elements
A liquid crystal display device, comprising:
- an upper electrode;
- a lower electrode;
- an upper alignment layer in contact with said upper electrode and a lower alignment layer in contact with said lower electrode to form an upper assembly and a lower assembly, respectively;
- and
- a liquid crystal material, disposed between the upper assembly and the lower assembly;
- wherein the upper assembly and the lower assembly are designed relative to each other, based on at least one surface potential measurement, to create a substantially predetermined surface potential difference between the upper assembly and the lower assembly;
- wherein at least one of said upper electrode and said lower electrode is treated such that a surface potential of at least one of said upper electrode and said lower electrode is changed so that an intrinsic DC offset potential in said liquid crystal display device is within a designed range.
4 more elements
A liquid crystal display device, comprising:
- an upper electrode;
- a lower electrode;
- an upper alignment layer in contact with said upper electrode and a lower alignment layer in contact with said lower electrode to form an upper assembly and a lower assembly, respectively;
- and
- a liquid crystal material, disposed between the upper assembly and the lower assembly;
- wherein the upper assembly and the lower assembly are designed relative to each other, based on at least one surface potential measurement, to create a substantially predetermined surface potential difference between the upper assembly and the lower assembly;
- wherein a passivation layer is disposed on at least one of said upper electrode and said lower electrode to form at least one of the lower assembly and the upper assembly wherein a surface potential of an assembly formed thereby is altered, such that a surface potential difference between the lower assembly and the upper assembly is adjusted and an intrinsic DC offset potential in said liquid crystal display device is changed.
4 more elements
Dependencies are inferred from the claim text.