Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2001-04-06
2002-10-22
Dudek, James (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S151000, C349S153000
Reexamination Certificate
active
06469767
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a liquid crystal display, further detailedly relates to a liquid crystal display using a simple matrix method (a passive matrix method) for a method of driving a liquid crystal.
2. Description of the Related Art
FIG. 11
shows the schematic configuration of a conventional type liquid crystal display using a simple matrix method. In this liquid crystal display, a transparent substrate
90
a
on which plural perpendicular transparent electrodes
91
a
are formed and a transparent substrate
90
b
on which plural horizontal transparent electrodes
91
b
are formed are mutually opposed and a liquid crystal inclusion body
92
in which a liquid crystal (not shown) is sealed is provided between a pair of these transparent substrates
90
a
and
90
b
. As also shown in
FIG. 12
, a driver
93
, plural terminals
94
, plural segment wiring
97
for connecting each perpendicular transparent electrode
91
a
to the driver
93
and plural common wiring
98
for connecting each horizontal transparent electrode
91
b to the driver
93
are provided to the transparent substrate
90
a.
However, as the plural horizontal transparent electrodes
91
b
are provided to the transparent substrate
90
b
, each common wiring
98
cannot be directly led out from each horizontal transparent electrode
91
b
. Therefore, as shown in
FIG. 13
, an extended part
91
b
′ acquired by extending one end in the longitudinal direction by a suitable dimension s
9
is provided to each horizontal transparent electrode
91
b
. Also, as shown in
FIG. 12
, the end
98
′ of each common wiring
98
opposite to each extended part
91
b
′ is formed. A connection
96
electrically connecting the end
981
and the extended part
91
b
′ is provided as shown in FIG.
11
. The connection
96
is formed via anisotropic conductive paste (not shown) between the end
98
′ of each common wiring
98
and each extended part
91
b
′.
According to such configuration, voltage can be selectively applied to the respective plural perpendicular transparent electrodes
91
a and plural horizontal transparent electrodes
91
b
by driving the driver
93
. Therefore, a desired image can be displayed on a liquid crystal screen formed by the liquid crystal inclusion body
92
.
However, the conventional type liquid crystal display has the following problems.
That is, in case the conventional type liquid crystal display is used for a display of a mobile telephone for example, the liquid crystal inclusion body
92
is set so that it can be viewed from the outside via an aperture provided to a case of the mobile telephone. However, in the conventional type liquid crystal display, the connection
96
is provided close to the liquid crystal inclusion body
92
. In the meantime, as described above, the connection
96
is a part in which the opaque anisotropic conductive paste is used. Therefore, heretofore, when a user of a mobile telephone sees a liquid crystal screen, the connection
96
comes into a visible area of the liquid crystal screen and it does not look nice.
In the conventional type, to solve only the problem, distance from the liquid crystal inclusion body
92
to the connection
96
has only to be increased. However, when such means is adopted, a problem that the total extrusion width s
10
of the plural common wiring
98
on the side of the liquid crystal inclusion body
92
is increased and the periphery of the liquid crystal inclusion body
92
, that is, a death area in the periphery of a liquid crystal screen is increased is caused.
SUMMARY OF THE INVENTION
The invention is devised in consideration of such circumstances and the object is to provide a liquid crystal display wherein means for connecting wiring for a transparent electrode can be prevented from standing out unseemly when the liquid crystal display is used without increasing a death area in the periphery of a liquid crystal screen.
To achieve the object, the invention adopts the following technical means.
The liquid crystal display provided by the invention is provided with a liquid crystal inclusion body in which a liquid crystal is sealed between first and second transparent substrates on which plural transparent electrodes are respectively formed, at least one driver mounted on the first transparent substrate, plural extended parts in which the end of each transparent electrode formed on the second transparent substrate is extended outside the liquid crystal inclusion body, plural wiring provided to the first transparent substrate and extended from a location opposite to each extended part to the driver and a connection for electrically connecting these plural wiring to the plural extended parts and is characterized in that a part of each wiring passes between the connection and the liquid crystal inclusion body.
In the liquid crystal display according to the invention, as a part of the plural wiring exists between the connection and the liquid crystal inclusion body, the connection is arranged in a location apart from the liquid crystal inclusion body by a dimension exceeding the width of the plural wiring. Therefore, when a liquid crystal screen formed by the liquid crystal inclusion body is viewed, the connection can be made invisible or can be prevented from standing out. Naturally, each wiring can be prevented from standing out by using the similar material to that of the transparent electrode. In the meantime, as a part of the plural wiring passes between the connection and the liquid crystal inclusion body, the plural wiring can be prevented from being extruded largely on the side of the liquid crystal inclusion body though distance between the connection and the liquid crystal inclusion body is increased to some extent. As a result, in the invention, the liquid crystal display can be made to look nicer without increasing a death area in the periphery of the liquid crystal screen.
In a preferred embodiment of the invention, each wiring has an intermediate part extended in a direction in which the each wiring crosses the plural extended parts and an end extended in a direction reverse to the liquid crystal inclusion body from the intermediate part, and the connection is provided via a conductive substance between the end and each extended part.
According to such configuration, the intermediate part of each wiring passes between the connection and the liquid crystal inclusion body and the configuration intended by the invention can be suitably realized.
In another preferred embodiment of the invention, the width of a part at least opposite to each extended part of the intermediate part of each wiring is made narrower than that of the end of each wiring.
According to such configuration, the intermediate part of each wiring and each extended part can be prevented from being opposite in a state in which both have large area. Therefore, even if an interval between each intermediate part and each extended part is minute, unjust electric conduction between these can be prevented. More concretely, when voltage is applied to any of the plural wiring, the application of the voltage can be prevented from having an effect upon the extended part to be naturally insulated from this wiring. Therefore, another preferred embodiment of the invention is desirable to prevent the malfunction of the liquid crystal display.
In another preferred embodiment of the invention, the width of a part at least opposite to the intermediate part of each wiring of each extended part is made narrower than that of a part opposite to the end of each wiring.
According to such configuration, as in case the width of at least a part of the intermediate part of each wiring is made narrow, the intermediate part of each wiring and each extended part can be prevented from being opposite in a state in which both have large area. Therefore, unjust electric conduction between the intermediate part and the extended part can be prevented and another preferred embodiment of the invention is de
Dudek James
Morgan & Lewis & Bockius, LLP
Rohm & Co., Ltd.
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