|Publication number||USRE41176 E1|
|Application number||US 10/379,547|
|Publication date||Mar 30, 2010|
|Filing date||Mar 6, 2003|
|Priority date||Jan 8, 1997|
|Also published as||CN1105937C, CN1190194A, US6198521|
|Publication number||10379547, 379547, US RE41176 E1, US RE41176E1, US-E1-RE41176, USRE41176 E1, USRE41176E1|
|Original Assignee||Ricoh Company, Ltd.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (8), Referenced by (2), Classifications (11), Legal Events (1)|
|External Links: USPTO, USPTO Assignment, Espacenet|
1. Field of the Invention
The present invention relates to a liquid crystal display device. More particularly, the present invention is related to a liquid crystal display device including electrodes on an upper substrate connected to electrodes on a lower substrate.
2. Discussion of the Background
A liquid crystal display cell includes two transparent substrates each having driving electrodes on the inner side of the substrate. The substrates are spaced apart substantially in parallel to each other forming a gap between the substrates. In addition, the gap between the two substrates contains a liquid crystal body.
A problem with a conventional liquid crystal display is that the cell gap of the liquid crystal display does not have a proper thickness because the connection of the electrodes by a sealing agent cause the liquid crystal cell to be weighted vertically. That is, the mask weight is distributed in a center of the substrates which causes uneven and undesired cell gap thicknesses, as shown, for example, in FIG. 4.
Accordingly, one object of this invention is to provide a novel liquid crystal display device in which the cell gap of the liquid crystal display maintains a predetermined thickness.
To achieve this object, the present invention provides a liquid crystal display device including a first transparent substrate having a contact hole, a second transparent substrate spaced apart substantially in parallel from the first transparent substrate to form a gap, and a liquid crystal body filling the gap between the first transparent substrate and the second transparent substrate. The first transparent substrate includes first driving electrodes and the second transparent substrate includes second driving electrodes and connection electrodes which pass through the contact hole of the first transparent substrate. In addition, the device includes external electrodes which connect to the second driving electrodes and connection electrodes through the contact hole of the first transparent substrate. The connection electrodes on the second transparent substrate are also connected to the first driving electrodes of the first transparent substrate at a location which is close to an edge of the contact hole.
A more complete appreciation of the present invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawing, wherein:
Referring now to the drawings, wherein like reference numerals designate identical or corresponding parts throughout the several views, and more particularly to
The lower substrate 10 and upper substrate 20 may be made of, for example, plastic film with a thickness of approximately 150 μm. In addition, the gap 4 between the lower substrate 10 and the upper substrate 20 can be, for example, approximately 8 μm.
As shown in
As discussed above, the upper substrate 10 and lower substrate 20 form a liquid crystal cell. Then, a sealing agent is formed at the locations 13 and 23 to connect the connection electrodes 12b of the lower substrate 10 to the driving electrodes 21a of the upper substrate 20 and a mask weight is increased on both sides of the cell.
According to the present invention, the points at which the connection electrodes 12b are connected to the driving electrodes 21a (i.e., locations 13 and 23) are close to the edge of the contact hole 22. Therefore, because the mask weight on the edge of the contact hole 22 is strongest, the mask weight, on the whole, can be decreased. Consequently, the cell gap of the liquid crystal cell maintains a predetermined thickness. The gap between the lower substrate 10 and the upper substrate 20 is also filled with a liquid crystal body.
The entire disclosure of Japanese Patent Application No. 09-001022 filed on Jan. 8, 1997 including the specification, claims, drawings and summary are incorporated herein by reference in its entirety.
Obviously, numerous modifications and variations of the present invention are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described herein.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US5625474 *||May 31, 1996||Apr 29, 1997||Sharp Kabushiki Kaisha||Full-color liquid crystal display device and fabrication process therefor|
|US5861929 *||Nov 4, 1992||Jan 19, 1999||Kopin Corporation||Active matrix color display with multiple cells and connection through substrate|
|JPH01302227A *||Title not available|
|JPH03167527A *||Title not available|
|JPH03264916A *||Title not available|
|JPH04365015A *||Title not available|
|JPS5614223A *||Title not available|
|JPS5974528A *||Title not available|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US8264656 *||Jul 22, 2009||Sep 11, 2012||Samsung Electronics Co., Ltd.||Liquid crystal display and manufacturing method thereof|
|US20100134745 *||Jul 22, 2009||Jun 3, 2010||Sang-Kueon Lee||Liquid crystal display and manufacturing method thereof|
|U.S. Classification||349/149, 349/139, 349/135|
|International Classification||G02F1/1343, G02F1/13, G02F1/1333, G02F1/1345|
|Cooperative Classification||G02F1/1345, G02F1/1333, G02F1/13452|