Electric lamp or space discharge component or device manufacturi – Process – With assembly or disassembly
Reexamination Certificate
2000-03-24
2001-05-01
Ramsey, Kenneth J. (Department: 2879)
Electric lamp or space discharge component or device manufacturi
Process
With assembly or disassembly
Reexamination Certificate
active
06224448
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a multicolor electroluminescent display device and a method of forming the same.
The conventional fabrication method is disclosed in Japanese laid-open patent publication No. 5-258859. This method has a problem with complicated fabrication processes.
The other method is disclosed in Asia Display 1995 S11-2. This method has a disadvantage in further providing a fluorescent material region in addition to the organic thin film electroluminescent element and a problem with complicated fabrication processes.
In the above circumstances, it had been required to develop a method of forming an electroluminescent display free from the above problems.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a novel method of forming an electroluminescent display free from the above problems.
The above and other objects, features and advantages of the present invention will be apparent from the following descriptions.
The present invention also provides an electroluminescent display having top and bottom stripe-shaped electrodes which extend in first and second directions perpendicular to each other so that at least a single electroluminescent organic thin film is sandwiched by the top and bottom electrodes whereby crossing regions of the top and bottom electrodes are aligned in matrix and sub-pixels are formed in the crossing regions, wherein shielding walls are partially provided at a boundary of each of the sub-pixels and wherein at least one sub-pixel involved in the each pixel has a light emission dopant in the emission layer or region.
The present invention also provides an electroluminescent display having top and bottom stripe-shaped electrodes which extend in first and second directions perpendicular to each other so that at least a single electroluminescent organic thin film is sandwiched by the top and bottom electrodes whereby crossing regions of the top and bottom electrodes are aligned in matrix and sub-pixels are formed in the crossing regions, wherein shielding walls are partially provided at a boundary of each of the pixels and wherein at least one sub-pixel involved in the each pixel has a light emission dopant in the emission layer or region.
The present invention also provides an electroluminescent display having top and bottom stripe-shaped electrodes which extend in first and second directions perpendicular to each other so that at least a single electroluminescent organic thin film is sandwiched by the top and bottom electrodes whereby crossing regions of the top and bottom electrodes are aligned in matrix and sub-pixel are formed in the crossing regions, wherein shielding walls are partially provided at a boundary of each of the pixels and also provided at a boundary between one sub-pixel and remaining ones of the sub-pixels and wherein at least one sub-pixel comprising each pixel has a light emission dopant in the emission layer or region.
The present invention also provides a method of forming an electroluminescent display having top and bottom stripe-shaped electrodes which extend in first and second directions perpendicular to each other so that at least a single electroluminescent organic thin film is sandwiched by the top and bottom electrodes whereby crossing regions of the top and bottom electrodes are aligned in matrix and sub-pixels are formed in the crossing regions, wherein said method comprises the steps of: partially providing shielding walls at a boundary of each of the sub-pixels; and depositing a host light emission material and a dopant separately from a different position to form an electroluminescent emission region.
The present invention also provides a method of forming an electroluminescent display having top and bottom stripe-shaped electrodes which extend in first and second directions perpendicular to each other so that at least a single electroluminescent organic thin film is sandwiched by the top and bottom electrodes whereby crossing regions of the top and bottom electrodes are aligned in matrix and sub-pixels are formed in the crossing regions, wherein said method comprises the steps of partially providing shielding walls at a boundary of each of the pixels; and depositing a host light emission material and a dopant separately from a different position to form an electroluminescent emission region.
The present invention also provides a method of forming an electroluminescent display having top and bottom stripe-shaped electrodes which extend in first and second directions perpendicular to each other so that at least a single electroluminescent organic thin film is sandwiched by the top and bottom electrodes whereby crossing regions of the top and bottom electrodes are aligned in matrix and sub-pixels are formed in the crossing regions, wherein said method comprises the steps of partially providing shielding walls at a boundary of each of the pixels and also at a boundary between one sub-pixel and remaining ones of the sub-pixels; and depositing a host light emission material and a dopant separately from a different position to form an electroluminescent emission region.
REFERENCES:
patent: 5294869 (1994-03-01), Tang et al.
patent: 5-258859 (1993-10-01), None
Tada Hiroshi
Utsugi Koji
NEC Corporation
Ramsey Kenneth J.
Young & Thompson
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