JP2005049555A - Liquid crystal display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent occurrence of color irregularity of non-display sections among display sections and abnormal lighting caused by static electricity in a liquid crystal display panel having a plurality of display sections. <P>SOLUTION: In the liquid crystal display panel, independent dummy electrodes 10 which are formed in an electrically independent manner from segment electrodes 3 and common electrodes 4, are provided on a transparent substrate 2b located on an anti-visible side. The areas of the independent dummy electrodes 10 are formed approximately equal to the areas of respective dots 12 constituted by the crossing sections of the segment electrodes 3 and the common electrodes 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dot matrix display liquid crystal display panel, and more particularly to a liquid crystal display panel including a plurality of display units.
[0002]
[Prior art]
In general, a liquid crystal display panel for displaying an image such as a specific figure or character by selectively applying an electric field to a predetermined portion of a pair of substrates filled with liquid crystal in the middle is a display means such as a computer or a mobile phone. Is often used.
[0003]
In such a liquid crystal display panel, for example, a common electrode is provided as a wiring electrode on the surface of the pair of substrates positioned on the viewing side and the non-viewing side facing the counter-viewing side substrate in the viewing side substrate, A segment electrode is provided as a wiring electrode on a surface of the side substrate facing the viewing side substrate. A rubbing-treated alignment film is provided on the surfaces of the common electrode and the segment electrode, and the pair of substrates is integrated by a sealing material provided in a peripheral portion of the pair of substrates facing each other. A liquid crystal and a plurality of spacers are sealed in a plane surrounded by the sealing material.
[0004]
Further, the non-display portion of the viewing side substrate that is not provided with the common electrode, and the portion facing the segment electrode of the opposing non-viewing side substrate is formed in a shape substantially the same as the shape of the common electrode. An equipotential dummy electrode having the same potential as the segment electrode is provided, and the equipotential dummy electrode is electrically connected to the segment electrode through the sealing material.
[0005]
Further, the non-display portion of the viewing side substrate that is not provided with the common electrode, and the segment electrode is provided in the portion of the opposing non-viewing side substrate that is provided with the segment electrode. In the position where the same potential dummy electrode cannot be formed, an independent dummy electrode formed electrically independently is provided.
[0006]
The equipotential dummy electrode and the independent dummy electrode prevent the occurrence of gap unevenness in the gap between the substrates, and the potential of the equipotential dummy electrode is the same as the potential of the wiring electrode of the opposing substrate through a sealing material. By setting the potential, charging of the equipotential dummy electrode was prevented, and abnormal lighting between the wiring electrode and the equipotential dummy electrode was prevented.
[0007]
[Problems to be solved by the invention]
However, when the liquid crystal display panel is mounted on various electronic devices as display means and used, if the display portion protective cover of each electronic device is rubbed, the liquid crystal display panel is visually recognized close to the display portion protective cover. The substrate on the side is strongly affected by static electricity generated by the friction.
[0008]
Here, in a liquid crystal display panel provided with a plurality of display portions, when an independent dummy electrode is provided in a non-display portion between the display portion and the display portion of the substrate on the viewing side, the wiring electrode or the like is electrically Since they are not connected, there is a high possibility that they will be charged by the static electricity, and abnormal lighting may occur between the independent dummy electrode and the wiring electrode.
[0009]
On the other hand, if an independent dummy electrode is not provided in the non-display part between the display parts in the liquid crystal display panel, there is a risk that gap unevenness will occur in the gap between the pair of substrates. There is a possibility that color unevenness may occur in the non-display portion between the display portions, or the wiring pattern of the wiring electrode may be seen through the display screen, and a good display cannot be performed. .
[0010]
The present invention has been made in view of these points, and in a liquid crystal display panel having a plurality of display portions, prevents occurrence of uneven color in the non-display portion between the display portions and abnormal lighting due to static electricity. An object of the present invention is to provide a liquid crystal display panel.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the liquid crystal display panel according to the first aspect of the present invention is characterized in that it has a pair of substrates positioned on the viewing side and the non-viewing side, and a plurality of display portions are provided. In the liquid crystal display panel in which the wiring electrodes and the dummy electrodes are provided on the surfaces facing each other, the independent dummy electrodes formed electrically independently of the dummy electrodes are each of the substrates on the anti-viewing side. It exists in the point provided in the non-display part between display parts.
[0012]
According to the first aspect of the present invention, when a liquid crystal display panel having a plurality of display units is mounted on an electronic device as a display means and used, the display unit protective cover of the electronic device is rubbed. Even when static electricity is generated by the above, the independent dummy electrode is provided on the counter-viewing side substrate and is separated from the display unit protective cover, so that it is not easily affected by the static electricity. For this reason, it is possible to prevent the independent dummy electrode from being charged by the static electricity.
[0013]
Further, the liquid crystal display panel according to claim 2 is characterized in that the independent dummy electrode is provided on the viewing-side substrate and the wiring electrode provided on the counter-viewing substrate. Is formed in an area having the same size as each dot.
[0014]
According to the second aspect of the present invention, the independent dummy electrode is formed so as to have an area of the same size as the area of each dot. Since the aperture ratio can be made substantially the same, the amount of light transmitted through each dot and each independent dummy electrode can be made substantially the same in the state where no electric field is applied to the wiring electrode.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a liquid crystal display panel according to the present invention will be described below with reference to FIGS.
[0016]
FIG. 1 is a schematic cross-sectional view showing a liquid crystal display panel according to the present embodiment. As shown in FIG. 1, the liquid crystal display panel 1 is provided with a segment electrode 3 as a display electrode inside the transparent substrate 2a on the viewing side of a pair of transparent substrates 2a and 2b made of glass or the like. A common electrode 4 is provided as a display electrode on the inner side of the transparent substrate 2b on the counter-viewing side.
[0017]
The opposing surfaces of the segment electrode 3 and the common electrode 4 are each provided with an alignment film (not shown) that has been subjected to a rubbing treatment. The pair of transparent substrates 2a and 2b is formed of the transparent substrate 2a. 2b is integrally formed with a sealing material 6 including conductive particles 5 provided in the peripheral portion, and a liquid crystal 7 and a plurality of spacers (not shown) are enclosed in a surface surrounded by the sealing material 6. ing.
[0018]
The non-display portion 17 where the common electrode 4 is not formed in the transparent substrate 2b on the counter-viewing side, and the segment electrode 3 is provided on the opposing transparent substrate 2a on the opposite side. An equipotential dummy electrode 9 having the same potential as the electrode 3 is provided. The equipotential dummy electrode 9 is electrically connected to the segment electrode 3 through the conductive particles 5 of the sealing material 6.
[0019]
Further, the non-display portion 16 that is not used for displaying characters, figures, etc. between the display portions 15 on the transparent substrate 2b on the counter-viewing side, and where the equipotential dummy electrodes 9, 11 cannot be formed. Are provided with an independent dummy electrode 10 which is formed electrically independent from the segment electrode 3 and the common electrode 4.
[0020]
The lateral dimension of the independent dummy electrode 10 in FIG. 2 is substantially the same as the width dimension in the direction perpendicular to the longitudinal direction of the opposing segment electrode 3, and the vertical dimension of the independent dummy electrode 10 is the longitudinal dimension of the adjacent common electrode 4. The width is almost the same as the width in the direction perpendicular to the direction. In other words, the dots 12 are formed so as to have substantially the same size and shape as the size and shape of each dot 12 formed by the intersection of the segment electrode 3 and the common electrode 4. Thereby, the aperture ratio in each independent dummy electrode 10 when the irradiation light is transmitted from the independent dummy electrode 10 to the viewing side through the liquid crystal 7 and the opposing segment electrode 3 is substantially equal to the aperture ratio in each peripheral dot 12. You can do the same.
[0021]
In the case where the independent dummy electrode 10 is provided at a position where it cannot be formed in substantially the same shape as each of the dots 12, for example, as shown in FIG. The size of the segment electrode 3 may be approximately the same as the width of the segment electrode 3 in the direction perpendicular to the longitudinal direction, and may be formed to have an area that is approximately the same as the area of each dot 12. This also makes it possible to make the aperture ratio of each independent dummy electrode 10 substantially the same as the aperture ratio of the surrounding dots 12.
[0022]
Next, the operation of this embodiment will be described.
[0023]
According to the present embodiment, when the liquid crystal display panel 1 is mounted on an electronic device such as a mobile phone as a display unit and used, static electricity is generated by rubbing the display unit protective cover of the electronic device. Even so, the independent dummy electrode 10 is provided on the transparent substrate 2b on the side opposite to the visual recognition side and is away from the display unit protective cover, so that it is not easily affected by the static electricity. For this reason, it is possible to prevent the independent dummy electrode 10 from being charged by the static electricity.
[0024]
Therefore, in the present liquid crystal display panel 1, the independent dummy electrode 10 can be prevented from being charged by the static electricity, so that a large potential difference is generated between the independent dummy electrode 10 and the wiring electrode facing the independent dummy electrode 10. Thus, abnormal lighting can be prevented.
[0025]
Further, by providing the independent dummy electrode 10 so as to face the wiring electrode, gap unevenness is prevented from occurring in the gap between the transparent substrates 2a and 2b, and color unevenness is prevented from occurring. can do. Furthermore, by providing the independent dummy electrode 10, it is possible to prevent a phenomenon that the wiring pattern of the segment electrode 3 is seen through the display screen. Thereby, this liquid crystal display panel can perform a high quality and favorable display.
[0026]
Further, in the present embodiment, the independent dummy electrode 10 is formed so as to have substantially the same shape as the surrounding dots 12, and the aperture ratio of each independent dummy electrode 10 and the aperture ratio of each dot 12 are formed. Therefore, the amount of light transmitted through each dot 12 and each independent dummy electrode 10 can be made substantially the same in a state where no electric field is applied to the wiring electrode or the like. Thereby, the liquid crystal display panel 1 can make the color of the portion corresponding to the arrangement position of each independent dummy electrode 10 substantially the same as the color of each surrounding dot, and can perform a good display without color unevenness. it can.
[0027]
In addition, this invention is not limited to the said embodiment, A various change is possible as needed.
[0028]
For example, in this embodiment, an independent dummy electrode is provided on the non-viewing side substrate so as to face the segment electrode of the viewing side substrate. However, the present invention is not limited to this. In the case where the electrode is formed, it is sufficient that the independent dummy electrode is provided on the counter-viewing side substrate so as to face the common electrode.
[0029]
【The invention's effect】
As described above, according to the liquid crystal display panel of the first aspect of the present invention, since the independent dummy electrode can be prevented from being charged by static electricity, the wiring electrode facing the independent dummy electrode can be prevented. It is possible to prevent abnormal lighting due to a large potential difference between the two. Further, by providing the independent dummy electrode so as to face the wiring electrode, it is possible to prevent gap unevenness from occurring in the gap between the two substrates and to prevent color unevenness from occurring. Furthermore, by providing the independent dummy electrode, the phenomenon that the wiring pattern of the wiring electrode can be seen through the display screen can be prevented. Thereby, according to this liquid crystal display panel, a high quality and favorable display can be performed.
[0030]
In addition, according to the liquid crystal display panel of the second aspect, the amount of light transmitted through each dot and each independent dummy electrode can be made substantially the same, which corresponds to the arrangement position of each independent dummy electrode. The color of the portion to be performed can be made substantially the same as the color of each surrounding dot, and a good display without color unevenness can be performed.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view showing a liquid crystal display panel of a liquid crystal display panel according to the present invention. FIG. 2 is an enlarged view showing an independent dummy electrode formed on the liquid crystal display panel according to the present invention. Enlarged view showing the independent dummy electrode formed on the other liquid crystal display panel
DESCRIPTION OF SYMBOLS 1 Liquid crystal display panel 2a, 2b Transparent substrate 3 Segment electrode 4 Common electrode 5 Conductive particle 6 Sealing material 7 Liquid crystal 9, 11 Equipotential dummy electrode 10 Independent dummy electrode 12 dot

Claims (2)

In a liquid crystal display panel having a pair of substrates positioned on the viewing side and the non-viewing side, provided with a plurality of display portions, and having wiring electrodes and dummy electrodes respectively provided on the surfaces of the substrates facing each other ,
A liquid crystal display panel, wherein an independent dummy electrode formed electrically independently of the dummy electrodes is provided in a non-display portion between the display portions of the substrate on the counter-viewing side. The independent dummy electrode is approximately the same size as the area of each dot formed by the intersection of the wiring electrode provided on the viewing-side substrate and the wiring electrode provided on the non-viewing-side substrate. The liquid crystal display panel according to claim 1, wherein the liquid crystal display panel is formed to have an area of 1 mm.

Images