JPH03239225A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To improve the display quality of a screen by providing an electrically insulated metallic simulated pattern between wiring patterns. CONSTITUTION:An electrically insulated metallic simulated pattern 5 is provided between wiring patterns 4. Therefore, the number of wiring patterns which follows a request of high definition conversion of an element increases, and even in the case a heterogeneous signal is transmitted to these wirings, the interference such as various induction actions, etc., having the fear of generation between adjacent wiring patterns 4 can be suppressed to the utmost by the metallic simulated pattern 5. In such a way, noise, ghost, etc., are reduced to the utmost, and the display quality of a liquid crystal screen can be improved.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to a liquid crystal display device, and more specifically, a chip-on-glass liquid crystal display element (hereinafter referred to as C0G-
This invention relates to the improvement of LCD elements (referred to as LCD elements).

(B) Prior Art FIGS. 5A and 5B are block diagrams of a liquid crystal display device according to a conventional example, and FIG. 5A shows a cross-sectional view thereof.

In the same figure (A), the liquid crystal display device has a transparent substrate (21)
It is equipped with a COG-L CD element (22) and a semiconductor element (hereinafter referred to as LSI) (23).

The C0G-LCD element (22) has a first display transparent electrode (
22A), second display transparent electrode (22B), liquid crystal (22
C), seal (22D) and transparent display panel (22E)
Consists of etc.

FIG. 2B shows a top view of the liquid crystal display device.

In the same figure <B), (24) is a wiring pattern,
The C0G-LCD element (22) and LSI (23) are electrically connected. The wiring pattern (24) is the first. It is made of an indium tin oxide (hereinafter referred to as ITO) material with an extended second display transparent electrode (22B), and constitutes a wiring group on the scanning line side, a signal line wiring group, and an input/output wiring group.

The function of this device is that when light is irradiated from the direction of the transparent substrate (21) and a voltage is selectively applied between the picture electrodes (22A, 22B), the amount of transparent light in the selected display panel portion changes, and characters are displayed. It is used to display symbols, symbols, etc.

(c) Problems to be Solved by the Invention According to the conventional example, the wiring pattern (24) extending from the LSI (23) to the first and second display transparent electrodes (22B>) is located on the scanning line side. It constitutes a wiring group, a signal line wiring group, and an input/output wiring group.

Therefore, these wirings contain signals that are different from each other, such as
Due to the nature of transmitting large current/small current, high frequency/low frequency, etc., adjacent wiring patterns (24) may be affected by various induction effects.
There is a risk of interference occurring between the two. This becomes more noticeable as the wiring spacing becomes narrower due to the demand for higher definition elements.

As a result, noise, ghost), etc. appear on the display screen,
There is a problem that the quality of the liquid crystal display deteriorates.

The present invention was created in view of the problems of the conventional example, and even when the number of wiring patterns increases, interference between the wirings is reduced as much as possible, and the display quality of the liquid crystal screen is improved. The purpose of the present invention is to provide a liquid crystal display device that enables this.

(d) Means for Solving the Problems FIG. 1 shows a principle diagram of a liquid crystal display device according to the present invention.

The first device has at least a first electrode (2A) and a second electrode (2B) on a transparent substrate (1) as shown in FIG.
and a liquid crystal display means (2) consisting of a liquid crystal (2C), a semiconductor element (3) for controlling the first and second electrodes (2A, 2B), the liquid crystal display means (2) and a semiconductor work. =3
- a plurality of wiring patterns 4) connecting between the wiring patterns (3); The second device is characterized by being provided with a pattern (5), as shown in FIG. (6)
and the metallic simulated pattern (5) are connected, and the third device is characterized in that the first
．． In the second device, the metallic simulated pattern (5
) is a metallic protective film (6) or other metallic simulated pattern (5) provided in the mounting area of another semiconductor element (3)
The above object is achieved by being connected to a common potential.

(E) Function According to the first device of the present invention, the metallic simulated pattern (5) electrically insulated from the wiring pattern <4) is provided between the wiring pattern (4). .

For this reason, even if the number of wiring patterns increases due to the demand for higher definition of devices and different signals are transmitted through these wirings, the metallic simulant pattern (5) can be used to transmit signals that are similar to the conventional example. It is possible to suppress as much as possible interference such as various induction effects that may occur between adjacent wiring patterns (24).

As a result, noise, ghosts, etc. that appear on the display screen as in the conventional example are reduced as much as possible, making it possible to improve the display quality of the liquid crystal screen.

Further, according to the second device of the present invention, the semiconductor element (3)
A metallic protective film (6) provided in the mounting area of the metallic dummy pattern (5) is connected to the metallic protective film (6).

For this reason, connection boards are used to connect the metallic simulated patterns (5) between the wiring patterns (4) distributed around the mounting area of the semiconductor element 3) to a common potential. The metallic protective film (6) can serve both of the functions of * and the function of a light-shielding film for the semiconductor element (3).

This makes it possible to increase the efficiency of the area used by the wiring pattern (4). This makes it possible to contribute to improving the display quality of the liquid crystal screen of the first device.

Further, according to the third device of the present invention, the metallic simulated pattern (5) is a metallic protective film (6) provided in the mounting area of the other semiconductor element (3) or other metallic It is connected to the simulated pattern (5) and connected to a common potential.

Therefore, by setting the common potential to, for example, the ground line potential, the metallic protective film (6) related to one semiconductor element (3) and the metallic simulated pattern (5) in the surrounding area are
It is possible to eliminate the influence of stray capacitance due to the metallic protective film (6) related to the other semiconductor element (3) and the metallic simulated pattern (5) of the surrounding area. can.

Thereby, in addition to improving the display quality of a liquid crystal screen like the first device, it is possible to improve the shielding effect of the semiconductor element (3).

(f) Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

2 to 4 are configuration diagrams of a liquid crystal display device according to an embodiment of the present invention.

FIGS. 2(A) and 2(B) are configuration diagrams of a liquid crystal display device according to a first embodiment of the present invention, and FIG. 2(A) shows a cross-sectional view thereof.

In the same figure (A), the first liquid crystal display device has a C0G-LCD element (12) and an LSI (13) on a transparent substrate 11).
) is provided.

The C0G-LCD element (12) is protected by an alignment film (12F), and the first element selects the display matrix of the liquid crystal screen.
display transparent type ai (12A), second display transparent electrode (1
2B), a transparent substrate (11), and a transparent display panel (12E)
) and a seal (12D), a transparent substrate (11), a polarizing plate (12G) provided on a transparent display panel (12E), etc.

Further, the L S I (13) that controls the first and second electrodes (12A, 12B) connects the bonding pad (1) of the wiring pattern (14) l patterned on the transparent substrate (11).
8) via a bump (17).

The C0G-LCD element (12) and LSI (13) are electrically connected by a wiring pattern (14).

The wiring pattern (14) is the first. Second display transparent electrode<
12B>, and constitutes a wiring group on the scanning line side, a signal line wiring group, and an input/output wiring group.

The configuration up to now is the same as the conventional example, but the present invention differs in configuration in the following points.

FIG. 2B shows a top view of the first liquid crystal display device.

In the figure, (15) is a dummy wiring pattern that is an example of the metallic simulated pattern (5), and is electrically insulated from the wiring pattern (14) between the wiring patterns (14). It is buttered.

The dummy wiring pattern (15) is formed by layering Niragel (Ni>, etc.) with good conductivity following the patterning process of the wiring pattern (12B>).The dummy wiring pattern (15) is formed using a metal mask LCD manufacturing method, for example. ITO
This is done by growing Ni on top.

8- Note that (16) is a metal light-shielding film that is an example of the metallic protective film (6), and is provided in the mounting area of the LSI (13). Metal light shielding film 16) is LSI
(13) to protect it from the influence of light. In the conventional example, the light shielding film was formed from an ITO-based material. A separate patent application is currently being filed for this as a metal protective film and low resistance wiring (6).

The function of the device is to use a polarizing plate (12G) on a transparent substrate (11).
) is irradiated with light (18) from the direction in which the picture electrode (1
When a voltage is selectively applied between 2A and 12B), the pretilt angle of the liquid crystal in the selected portion changes, and light passes therethrough to display characters, symbols, etc.

In this manner, according to the first embodiment of the present invention, the dummy wiring pattern (15) electrically insulated from the wiring pattern (14) is provided between the wiring patterns (14). There is.

For this reason, the number of wiring patterns such as scanning line side wiring, signal line wiring, input/output wiring, etc. has increased due to the demand for higher definition of devices, and these wirings have high current/small current, high frequency/low frequency, etc. Even when different signals are transmitted, the dummy wiring pattern (15) minimizes interference such as various induced effects that may occur between adjacent wiring patterns (14) as in the conventional example. Can be suppressed.

As a result, noise, ghosts, etc. that appear on the display screen as in the conventional example are reduced as much as possible, making it possible to improve the display quality of the liquid crystal screen.

FIG. 3 is a top view of a liquid crystal display device according to a second embodiment of the present invention, and the figure inside the broken line circle in the figure shows an enlarged view thereof.

In the figure, the second liquid crystal display device is different from the first device in that the metal light shielding film (16) provided in the mounting area of LSI (t3) and the dummy wiring pattern (15) are connected. It is something.

That is, the dummy wiring patterns (15) distributed around the LSI (13) are covered with a metal light shielding film (16).
is used as the connection boat for central connection.

This eliminates the difference in the distribution of stray capacitance of the dummy wiring pattern (15), which has been kept in an electrically neutral state. This makes it possible to suppress as much as possible interference such as various induced effects that may occur between adjacent wiring patterns (14) as in the conventional example, which is not affected by stray capacitance.

Components with the same reference numerals as those in the first embodiment have the same functions, so the explanation will be omitted.

Thus, according to the second embodiment of the invention, L
A metal light shielding film (16) provided in the mounting area of the S I (13) and a dummy wiring pattern (15) are connected.

For this reason, the function of the connection port for connecting the dummy wiring patterns (15) between the wiring patterns (14) distributed around the mounting area of the LSI (13) to a common potential, and the function of the light shielding of the LS13) The metal light-shielding film (16) can also serve as a film.

This makes it possible to increase the efficiency of the design area of the wiring pattern (14). This makes it possible to contribute to improving the display quality of the liquid crystal screen of the first device.

11- FIG. 4 is a top view of a liquid crystal display device according to a third embodiment of the present invention, and the figure inside the broken line circle in the figure shows an enlarged view thereof.

In the figure, 1. The third liquid crystal display device is different from the second device in that the dummy wiring pattern (15) is
Metal light shielding film (1) provided in the mounting area of I (13)
6) or another dummy wiring pattern (15) to be connected to a common potential.

That is, parasitic charges in the stray capacitance of the metal light-shielding film 16) distributed for each LSI (13) and the dummy wiring pattern (15) are avoided by using a common potential such as a ground line. As a result, it is not affected by stray capacitance.
It is possible to suppress as much as possible interference such as various induction effects that may occur between adjacent wiring patterns (14) as in the conventional example.

Components with the same reference numerals as those in the first embodiment have the same functions, so the explanation will be omitted.

In this manner, according to the third embodiment of the present invention, the dummy wiring pattern (15) is connected to the metal light-shielding film (16) provided in the mounting area of another LSI (13) or another one.
2- Connected to the dummy wiring pattern (15) and connected to the ground line.

Therefore, the metal light shielding film (16) related to one LSI (13) and the dummy wiring pattern (
15) and other LSI (
The influence of stray capacitance caused by the metal light-shielding film (16) and the dummy wiring pattern (15) in its surrounding area can be eliminated.

Thereby, in addition to improving the display quality of the liquid crystal screen like the first device, it is possible to improve the shielding effect of LSI (13).

(G) As described in detail, according to the present invention, the dummy wiring pattern connected to the ground line and the metal light-shielding film is provided between the wiring patterns.

For this reason, even if the number of wiring patterns increases due to the demand for higher definition devices, and different signals are transmitted to these wirings, the dummy wiring pattern will prevent the induction effect, etc. It becomes possible to suppress interference as much as possible and improve the shielding effect of the semiconductor element.

As a result, noise, ghosts, etc. that appear on the display screen as in the conventional example are reduced as much as possible, making it possible to improve the display quality of the liquid crystal screen.

[Brief explanation of drawings]

FIG. 1 is a principle diagram of a liquid crystal display device according to the present invention, FIG. 2 is a block diagram of a liquid crystal display device according to a first embodiment of the present invention, and FIG. 3 is a diagram showing a structure of a liquid crystal display device according to a first embodiment of the present invention. FIG. 4 is a top view of a liquid crystal display device according to an example of the invention, FIG. 4 is a top view of a liquid crystal display device according to a third embodiment of the present invention, and FIG. 5 is a configuration diagram of a liquid crystal display device according to a conventional example. (1)...Transparent substrate, (2)...Liquid crystal display means,
(2A)...first electrode, (2B)...second electrode, (2C)...liquid crystal, 3)...semiconductor element, (4)...wiring means, (5 )...Metallic simulated pattern, (6)...Metallic protective film.

Claims (3)

[Claims] (1) A liquid crystal display means comprising at least a first electrode, a second electrode and a liquid crystal, a semiconductor element controlling the first and second electrodes, and a connection between the liquid crystal display means and the semiconductor element on a transparent substrate. 1. A liquid crystal display device comprising: a plurality of connecting wiring patterns; and a metallic dummy pattern electrically insulated from the wiring patterns is provided between the wiring patterns. (2) The liquid crystal display device according to claim 1, wherein a metallic protective film provided in the mounting area of the semiconductor element and the metallic simulated pattern are connected. (3) The metallic simulated pattern is connected to a common potential by being connected to a metallic protective film provided in a mounting area of another semiconductor element or to another metallic simulated pattern. The liquid crystal display device according to claim 1 or 2.