Liquid crystal display device and manufacturing method thereof
Inactive Publication Date: 2003-04-01
SEIKO EPSON CORP
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
It is another object of the present invention to improve the reliability of electrical conductive connection between a liquid crystal panel and an FPC without increasing of cost for manufacturing.
It is a further object of this invention is to reduce the cost of liquid crystal display device and products using it, and to improve the durability of these products by improving the reliability of the electrically conductive connection portion and the registration rate of such products.
Problems solved by technology
Conventional liquid crystal display devices have a number of disadvantages and problems as described below.
As a result wires may be cut, separated, or cause an interruption in the circuit.
As a result of this configuration, the resistance of the connection portion tends to increase, and the risk of a break in the circuit also increases.
However, in this way, it is difficult to maintain the quality of the connection portion, and there is a problem that the cost for manufacturing FPC 10 increase, therefore, the problem can not be solved in the above way.
In addition, in so called heat seal method for connecting the FPC through the anisotropic conductive film, although it is an easier operation for connecting, there is a problem, however, that due to the temperature, the conductive particles float in the anisotropic conductive film.
This results in the conductive particles being separated from upper surface of the external terminals, and the conductive connection between them are then easily broken.
As such there has been an increase in defective products.
Method used
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Embodiment Construction
Next, the embodiments of the invention will be explained with references to the drawings. Referring to FIGS. 1 and 2 the liquid crystal display device of this embodiment is provided with top substrate 1 and bottom substrate 2 made of glass or a transparent resin substrate. Electrodes 3, 4 which are preferably transparent, are formed in a striped shape of an inner surface of the top substrate 1 and an inner surface bottom substrate 2. A liquid crystal layer 5 is then sealed between the top substrate 1 and bottom substrate 2 by seal material 6. A display area D is formed at an outer portion of top substrate 1 corresponding to the liquid crystal layer 5. A refractor (not shown) may be provided on the outer portion of bottom substrate 2. Turning to FIG. 2, bottom substrate 2 extends outwardly beyond substrate 1, forming an exposed electrode lead-out area 2a, on the inner surface of bottom substrate 2. Further, polarization plates (not shown) may be placed on the outer surface of top sub...
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Abstract
A liquid crystal display device is provided having a plurality of electrodes in electrical communication with a conduction portion of a plurality of external wirings. An external portion is in electrical communication with the plurality of electrodes and comprises a conduction layer having a predetermined thickness, the conduction layer being arranged in a predetermined pattern on the external portion and between the external wirings and the external portion.
Description
BACKGROUND OF THE INVENTION1. Field of the InventionThe invention relates to a liquid crystal display device and method of manufacturing it, and more particularly, relates to a structure of a connection portion existing between a liquid crystal panel and a flexible substrate.2. Description of the Related ArtThere are various kinds of conventional liquid crystal display devices. In conventional liquid crystal display devices, by sealing a liquid crystal layer between two transparent substrates, and applying a voltage between the electrodes having fixed pattern formed inside of the substrates, it is possible to display various images.In many cases, conventional liquid crystal display have a flexible substrate (referred to as an FPC hereinafter) to connect the liquid crystal display panel to control and drive circuits located outside of the liquid crystal display device. An example of the liquid crystal display device is described in the Utility Model (examined) Publication Hei 5-18789...
Claims
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Patent Timeline
Login to View More IPC IPC(8): G02F1/13G02F1/1345G09F9/00H05K1/09H05K3/24H05K3/32H05K3/36H05K3/40
CPCG02F1/1345G02F1/13452H05K1/095H05K3/245H05K3/323H05K3/361H05K3/4007H05K2201/0367H05K2201/0373G02F1/13456
InventorKANEZAWA, TATSUO
OwnerSEIKO EPSON CORP