JPH09265083A - LCD panel - Google Patents

Abstract

There is provided a liquid crystal display panel capable of suppressing the occurrence of a reverse tilt domain due to a horizontal electric field between a pixel electrode and a wiring electrode. A liquid crystal display panel having a liquid crystal layer 113 sandwiched between an array substrate 101 and a counter substrate 108,
The insulating film 10 is provided in the gap between the pixel electrode 106 and the wiring electrode including at least the gate line 103 and the source line 104.
The conductive thin film 105 is formed so as to be electrically connected to the pixel electrode 106 via the electrode 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display panel that displays an image by the electro-optical characteristics of liquid crystal sandwiched between substrates.

[0002]

2. Description of the Related Art A liquid crystal display panel utilizing the electro-optical characteristics of liquid crystal has been actively applied to OA equipment due to its large screen and large capacity. At present, the operation modes of liquid crystal display panels that are generally put into practical use are a twisted nematic type (hereinafter, referred to as a TN type) in which liquid crystal molecules are twisted by 90 ° between two glass substrates.
Super twisted nematic type (hereinafter, referred to as STN) in which liquid crystal molecules are twisted 180 ° to 270 °
There is a type). The TN type is mainly used for an active matrix type liquid crystal display panel, and the STN type is used for a simple matrix type liquid crystal display panel.

In recent years, in particular, the applications of active matrix type liquid crystal display panels have dramatically expanded, and along with this, there has been an increasing demand for wide viewing angles, high brightness, low reflection, high definition and full color. For such requests,
Black matrix on TFT array (hereinafter referred to as BM on array) technology (for example, Etch Yamanaka, Tea.
Fukunaga, T. Koseki, Kay Nagayama, T. Ueki: S-Id '92 digest, pages 789-792, 1992; H. Yamanaka, T. Fukunaga,
T. Koseki, K. Nagayama, T. Ueki: SID '92 Digest, pp7
89-792, (1992) and Japanese Patent Laid-Open No. 63-6402.
No. 3) is proposed. This B
The M-on-array technology is to form a light-shielding layer made of black resin directly on the active elements, source lines, and gate lines on the array substrate.

Conventional color filter substrates (hereinafter,
A black matrix (hereinafter referred to as B) on a CF substrate
In the BM on array technology, the BM layer is formed directly on the array substrate, so that a bonding margin between the array substrate and the CF substrate at the time of panel assembly is unnecessary, The width of the BM layer (hereinafter, BM
It is possible to narrow the width). By reducing the BM width, the aperture ratio of the pixel electrode portion can be improved, and higher luminance can be achieved as compared with the related art.

Further, in the BM on-array technology, the pigment-dispersed black resist is used as the material of the BM layer, so that the reflectance is low and compared to the conventional BM layer using a metal material,
Surface reflection can be significantly suppressed, and display quality can be improved.

[0006]

However, the active matrix type liquid crystal display panel is a TFT type liquid crystal display panel based on the BM on array technology. In the conventional liquid crystal display panel as described above, a gap between the pixel electrode and the wiring electrode is formed. Since a lateral electric field is generated in the portion due to the potential difference, an inverse tilt domain different from the regular domain is generated, and there is a problem that the image quality is deteriorated due to an afterimage and a reduction in contrast.

Further, in the BM on array technology used in the conventional liquid crystal display panel, the reverse tilt domain generated as described above is hidden in order to form the BM layer on the active element, the source line and the gate line. It also had a problem that it became difficult.

The present invention solves the above problems, and can suppress the reverse tilt domain generated by the lateral electric field in the gap between the pixel electrode and the wiring electrode, and the image quality caused by the reverse tilt domain. (EN) A liquid crystal display panel capable of suppressing the deterioration of the pixel ratio and designed so that the pixel electrode portion has a high aperture ratio.

[0009]

In order to solve the above problems, a liquid crystal display panel according to claim 1 of the present invention is directed to an array substrate having pixel electrodes, wiring electrodes, and switching elements, and an opposing substrate having opposing electrodes. A liquid crystal display panel comprising a liquid crystal sandwiched between a substrate, wherein an insulating layer is formed in a gap between the pixel electrode and the wiring electrode, and a conductive thin film having conductivity is formed on the insulating layer. Is formed so as to be in contact with the pixel electrode and located around the pixel electrode.

In a liquid crystal display panel according to a second aspect, the conductive thin film according to the first aspect is made of a conductive polymer or metal having a light shielding property. According to these configurations,
The conductive thin film becomes electrically conductive with the pixel electrode, and the conductive thin film is electrically connected to the wiring electrode in the substrate normal direction via the insulator layer formed between the pixel electrode and the wiring electrode. Form a capacity. Further, the conductive thin film acts as a black matrix due to its light shielding property.

A liquid crystal display panel according to a third aspect is a liquid crystal display panel in which liquid crystal is sandwiched between an array substrate having pixel electrodes, wiring electrodes, and switching elements, and a counter substrate having counter electrodes. A dielectric layer made of a dielectric is formed at least in the gap between the pixel electrode and the wiring electrode and in a part of the pixel electrode.

According to a fourth aspect of the present invention, there is provided a liquid crystal display panel, wherein the dielectric layer according to the third aspect has a film thickness of 0.5 μm or more and 2 or more.
It is formed so as to have a thickness of μm or less. According to these configurations, the dielectric layer formed in the gap between the pixel electrode and the wiring electrode and a part of the pixel electrode shields the region where the horizontal electric field is strongest, and the liquid crystal molecules directly influence the influence of the horizontal electric field. Avoid receiving it. Further, the dielectric layer formed as described above weakens the electric field strength of the lateral electric field due to the large relative permittivity.

A liquid crystal display panel according to a fifth aspect is a liquid crystal display panel in which liquid crystal is sandwiched between an array substrate having pixel electrodes, wiring electrodes and switching elements and a counter substrate having a counter electrode. An insulating light-shielding film containing polyester as a main component is formed at least in a gap between the pixel electrode and the wiring electrode and a part of the pixel electrode.

In a liquid crystal display panel according to a sixth aspect, the insulating light-shielding film according to the fifth aspect is formed by using a polyester containing a photopolymerizable oligomer and a photopolymerizable monomer as a main component.

According to these structures, the insulating light-shielding film containing polyester as a main component, which is formed in the gap between the pixel electrode and the wiring electrode and a part of the pixel electrode, shields the region where the horizontal electric field is strongest. The liquid crystal molecules are prevented from being directly affected by the lateral electric field, and act as a black matrix due to their light shielding properties. Further, the insulating light-shielding film is easily formed by using light irradiation.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below using a liquid crystal display panel showing an embodiment of the present invention.

In the liquid crystal display panel of the present embodiment, switching elements, wiring electrodes and pixel electrodes arranged in a marix shape are formed on the array substrate. An insulating film is formed as an insulating layer in the gap between the wiring electrode and the pixel electrode, and a conductive thin film having conductivity is further formed between the wiring electrode and the pixel electrode in an electrically conductive state. Are formed in a conductive state.

When a normal active matrix type liquid crystal display panel is driven, the potential of the wiring electrodes changes line by line or frame by frame, so that a potential difference is generated between the pixel electrodes and the wiring electrodes and the pixel electrodes. An electric field in the lateral direction is generated in the gap between and. With higher pixel aperture ratio and higher pixel density, the gap between wiring electrode and pixel electrode becomes narrower than the distance between the substrates and occurs in the gap more than the vertical electric field strength applied to the liquid crystal layer. In some cases, the horizontal electric field strength becomes stronger.

In such a case, the liquid crystal molecules in the vicinity of the gap between the wiring electrode and the pixel electrode are strongly affected by the lateral electric field, so that they do not rise in a region opposite to the predetermined tilt direction or at all. Regions are generated at the gap and the end of the pixel electrode. This region becomes the reverse tilt domain, which causes deterioration of the display quality of the screen.

In the liquid crystal display panel of the present embodiment, since the conductive thin film is provided in the electrode gap where the horizontal electric field is most strongly generated in a state of being in electrical contact with the pixel electrode, the horizontal electric field generated in the gap is generated. It can be weakened by changing the distribution. As a result, it is possible to suppress the occurrence of the reverse tilt domain due to the lateral electric field. Furthermore, since the conductive thin film has a light shielding property,
It can also be used as a black matrix.

Next, in a liquid crystal display panel showing another embodiment of the present invention, switching elements, wiring electrodes and pixel electrodes arranged in a matrix are formed on an array substrate. At least a gap between the wiring electrode and the pixel electrode has a dielectric layer formed of a dielectric having a film thickness of 0.5 μm to 2 μm, and the dielectric layer shields a lateral electric field in the gap. That is, the influence of the lateral electric field can be reduced and the occurrence of the reverse tilt domain can be suppressed by covering the gap portion where the lateral electric field is most concentrated and which disturbs the liquid crystal molecules with the dielectric layer. As the dielectric constant of the dielectric layer is larger, the lateral electric field strength can be weakened and a more shielding effect can be obtained. However, if the dielectric constant is large, the parasitic capacitance generated between the pixel electrode and the wiring electrode becomes large, which is preferable. Absent.
Further, the thicker the film thickness of the insulating film is, the more the shielding effect can be obtained.

The liquid crystal display panel showing the embodiment of the present invention will be described below more specifically with reference to the drawings. The liquid crystal display panel of the first embodiment will be described.

FIG. 1 is an example of a configuration diagram of a liquid crystal display panel of the present embodiment. In FIG. 1, 101 is an array glass substrate, 102 is a switching element composed of a thin film transistor element (TFT element), 103 is a gate line, 1
Reference numeral 04 is a source line, 105 is a conductive thin film, 106 is a pixel electrode, 107 is an insulating film, 108 is a counter glass substrate, and 109 is a counter glass substrate.
Is a black matrix on the opposite side, 110 is a color filter layer, 111 is a counter electrode, 112 is an alignment film, 113 is a liquid crystal layer, and 114 is a polarizing plate.

On the array glass substrate (7059: manufactured by Corning Incorporated) 101, a switching element 102 made of an amorphous silicon TFT element is formed by a predetermined method.
A gate line 103 made of Al / Ta, a source line 104 made of Ti / Al, a pixel electrode 106 made of indium tin oxide (ITO) are formed, and a protective film made of silicon nitride is formed in a region other than the pixel electrode 106. The array substrate A1 was produced.

Next, 44% by weight of polyester acrylate, 20% by weight of trifunctional acrylate monomer, 4% by weight of acetophenone type photopolymerization initiator, 6% by weight of benzophenone type photopolymerization initiator, 16% by weight of carbon black and polyester type dispersant. A carbon black ink consisting of 10% was prepared and diluted with methoxybutyl acetate to prepare a varnish.

After exposing the array glass substrate 101 to the OAP atmosphere for 10 minutes, carbon black varnish was applied to the entire surface other than the alignment marker by a coater. Then, after pre-baking at 110 ° C. for 20 minutes, alignment is performed using a photomask on which a predetermined pattern is formed, and then 160 mJ using a high pressure mercury lamp.
The exposure was performed with the power of and the etching was performed with an alkaline developing solution.

After that, thermal curing was performed at 230 ° C. for 20 minutes to form a conductive thin film 105 on the gap between the source line 104 and the pixel electrode 106 and on the pixel electrode 106. The conductive thin film 105 was partially formed on the pixel electrode 106 up to a region of 3 μm from the end of the pixel electrode 106. The thickness of the conductive thin film was 0.5 μm.

Next, the array substrate A1 is exposed to oxygen plasma for a certain period of time to perform surface modification, and then the solid content concentration 6
% Polyimide varnish (for example, SE-7210: manufactured by Nissan Chemical Industries, Ltd.) was applied on the array substrate A1 by a printing method, and baked on a hot plate at 190 ° C. for 30 minutes to form an alignment film 112. The film thickness of the alignment film 112 was about 70 nm. The same polyimide varnish was applied on the counter substrate T1 having the counter glass substrate 108 as a base material to form the alignment film 112 made of polyimide.

Next, so that the liquid crystal is 90 ° TN aligned,
The array glass substrate 101 and the counter glass substrate 108 were each rubbed in one direction. As the rubbing cloth, rayon cloth (YA-18R: manufactured by Yoshikawa Kako) was used, and the rubbing pressure was 0.3 mm.

Next, spherical spacers made of plastic (for example, Micropearl: manufactured by Sekisui Fine Co., Ltd.) were uniformly dispersed on the array substrate A1. The spherical diameter of the spacer is 4 μm. A thermosetting sealing material (for example, Structbond: manufactured by Mitsui Toatsu Chemicals, Inc.) is formed on the peripheral portion of the counter glass substrate 108 by printing by providing a liquid crystal injection port,
The array substrate A1 and the counter substrate T1 were bonded together, and the sealing material was completely cured at a predetermined temperature to produce a liquid crystal cell.

Next, a nematic liquid crystal having a refractive index anisotropy of 0.097 (eg, ZLI-4792: manufactured by Merck Japan Co., Ltd.) is left-twisted with a chiral substance (eg, S-8).
11: Merck Japan Co., Ltd.) was added and the concentration was adjusted so that the twist pitch was 80 μm. The chiral nematic liquid crystal manufactured under such conditions is injected into a liquid crystal cell by a vacuum injection method, and after the chiral nematic liquid crystal is completely filled, the liquid crystal injection port is sealed with a sealing resin to face the array glass substrate 101. A polarizing plate 114 was attached to the surface of the glass substrate 108 so that its absorption axis was parallel to the rubbing direction, that is, in a normally white state, to manufacture a liquid crystal display panel. Next, the orientation of the produced liquid crystal display panel was observed. The liquid crystal display panel was driven to observe the orientation when the white display was switched to the black display. FIG. 2A is a schematic view of the present liquid crystal display panel observed from above. In FIG. 2A, 121 is a source line, 122 is a gate line, 123 is a pixel electrode, 124 is a gap between the source line and the pixel electrode, 125 is a conductive thin film (hatched portion), and 126 is a reverse tilt domain. . The gap 124 between the source line and the pixel electrode is the region most susceptible to the lateral electric field from the source line 121. In the present embodiment, no reverse tilt domain was found in the region where the conductive thin film 125 was formed, but an arcuate reverse tilt domain 126 was generated in the region where the conductive thin film was not formed. From the above results, it was confirmed that the formation of the conductive thin film in the gap portion 124 between the pixel electrode 123 and the wiring electrode such as the source line 121 clearly suppresses the reverse tilt domain 126.

In the conventional liquid crystal display panel, a bow-shaped reverse tilt domain as shown in FIG. 2A is generated near the gap between the source line and the pixel electrode.
Although it was necessary to hide the black matrix provided in No. 1 and hindered the improvement of the aperture ratio, by using this embodiment, it is not necessary to provide the black matrix on the counter substrate T1 and the aperture ratio can be improved. Will be possible. Further, if the conductive thin film 125 itself has a light blocking property, it is possible to block light leakage in the gap portion.

In the present embodiment, the conductive thin film 125 is formed in a part of the gap portion 124 between the source line and the pixel electrode. However, as shown in FIG. 2B, the source line 121 and the gate line 122. If the conductive thin film 125 is formed on the entire surface of the gap between and, the occurrence of the reverse tilt domain can be suppressed more effectively.

The same effect was obtained by forming the conductive thin film 125 using a metal such as chromium or tantalum or a metal oxide such as chromium oxide. The liquid crystal display panel of the second embodiment will be described.

FIG. 3 is an example of a sectional view of the liquid crystal display panel in the present embodiment. Similar to the liquid crystal display panel of the first embodiment, a switching element 202 made of an amorphous silicon TFT element, a gate line 203, a source line 204, and a pixel electrode 206 are formed on the array glass substrate 201 by a predetermined method. Then, the array substrate A2 was manufactured.

Next, a photosensitive polyimide solution (trade name: Photo Nice UR-3, manufactured by Toray Industries, Inc.) is formed on the array substrate A2.
100) was applied by a spinner, prebaked in an oven at 80 ° C. for 60 minutes, aligned with a photomask having a predetermined pattern, and then exposed under a high-pressure mercury lamp at a power of 80 mJ to obtain a developing solution (Toray Co., Ltd.). Development was carried out using a product of the company: product name DV-140).

After that, thermosetting is performed on a hot plate at 250 ° C. for 30 minutes, and the dielectric layer 205 is formed on at least the peripheral portion of the pixel electrode 206, the pixel electrode 206 and the source line 2.
04 and the gap between the gate lines 203. Pixel electrode 2
On the dielectric layer 2 up to a region of 3 μm from its end.
05 was formed. The film thickness of the dielectric layer 205 was 1.5 μm.

Next, a polyimide varnish (for example, SE-7210: manufactured by Nissan Chemical Industries, Ltd.) is applied on the counter substrate T2 and the array substrate A2 by printing, baked at 230 ° C. for 30 minutes, and made of a polyimide resin. The film 211 was formed. The film thickness was about 70 nm. After that, the array glass substrate 201 and the counter glass substrate 207
Then, rubbing was performed so that the liquid crystal was 90 ° TN aligned. Rayon cloth was used as the rubbing cloth, and the rubbing pressure was 0.3 mm.

Next, spherical spacers made of plastic (for example, Micropearl: manufactured by Sekisui Fine Co., Ltd.) were uniformly dispersed on the array substrate A2. The spherical diameter of the spacer is 4 μm. A thermosetting sealant (for example, Struct Bond: manufactured by Mitsui Toatsu Chemicals, Inc.) is formed on the peripheral portion of the counter glass substrate 207 by a liquid crystal injection port and printed to bond the array substrate A2 and the counter substrate T2 to each other. The sealing material was completely cured at a predetermined temperature to produce a liquid crystal cell.

Next, a nematic liquid crystal having a refractive index anisotropy of 0.097 (eg, ZLI-4792: manufactured by Merck Japan Co., Ltd.) is left-twisted with a chiral substance (eg, S-8).
11: Merck Japan Co., Ltd.) was added and the concentration was adjusted so that the twist pitch was 80 μm. The chiral nematic liquid crystal produced under such conditions is injected into a liquid crystal cell by a vacuum injection method, and after the chiral nematic liquid crystal is completely filled, the liquid crystal injection port is sealed with a sealing resin,
A polarizing plate 213 was attached to the surfaces of the array substrate A2 and the counter substrate T2 so that the absorption axes thereof were parallel to the rubbing direction, and a liquid crystal display panel was produced.

Also in the liquid crystal display panel of the present embodiment, no occurrence of the reverse tilt domain was observed when switching from white display to black display, and the effect was confirmed. This is because the gap between the strongest horizontal electric field and the end of the pixel electrode are covered with a dielectric so that the liquid crystal molecules do not exist in the strongest portion of the horizontal electric field, and as a result, the influence of the horizontal electric field is reduced. It is considered to be due to

On the other hand, as a comparative example, when the film thickness of the dielectric layer 205 is less than 0.5 μm, a sufficient transverse electric field shielding effect cannot be obtained, the occurrence of the reverse tilt domain is observed, and the film thickness is also increased. When it is more than 2 μm, the orientation failure is remarkable due to the rubbing failure caused by the step, which is not preferable. From the above results, it is preferable that the film thickness of the dielectric layer 205 is between 0.5 μm and 2 μm.

When the relative dielectric constant of the material forming the dielectric layer 205 is large, the transverse electric field shielding effect is large, but conversely, the pixel electrode 206 and the source line 204 or the gate line 2 are made.
The parasitic capacitance between the wiring electrode 03 and the like is increased, which is not preferable. Therefore, considering the effects of the shield effect and the parasitic capacitance, it is preferable that the relative dielectric constant has a value of about 3 to 20 (at 10 KHz).

A liquid crystal display panel according to the third embodiment will be described. FIG. 4 is an example of a cross-sectional view of the liquid crystal display panel in this embodiment. Similar to the liquid crystal display panel of the first embodiment, the switching element 302 made of an amorphous silicon TFT element, the gate line 303, and the source line 30 are formed on the array glass substrate 301 by a predetermined method.
4, the pixel electrode 306 was formed, and the array substrate A3 was produced.

Next, 44% by weight of polyester acrylate, 20% by weight of trifunctional acrylate monomer, 4% by weight of acetophenone type photopolymerization initiator, 6% by weight of benzophenone type photopolymerization initiator, 20% by weight of pigment, and 6% of polyester type dispersant. %, A black photosensitive ink was prepared and diluted with methoxybutyl acetate to prepare a non-conductive varnish.

Next, the above-mentioned varnish was coated on the entire surface of the array substrate A3 by a coater except the alignment marker. Then, after prebaking at 110 ° C. for 20 minutes, alignment was performed with a photomask having a predetermined pattern formed, exposure with a power of 160 mJ was performed under a high pressure mercury lamp, and development was performed with an alkaline aqueous solution.

After that, thermal curing is performed on a hot plate at 220 ° C. for 30 minutes, and the insulating light-shielding film 305 is formed on at least the peripheral portion of the pixel electrode 306 and the gap portion between the pixel electrode 306, the source line 304, and the gate line 303. Set up in. An insulating light-shielding film 305 was formed on the pixel electrode 306 up to a region of 3 μm from its edge. The film thickness was 1.5 μm.

Next, a polyimide varnish for horizontal alignment (for example, SE-7210: on the counter substrate T3 and the array substrate A3).
Nissan Chemical Industries Co., Ltd.) is applied by printing, and 230
The polyimide alignment film was formed by baking at 30 ° C. for 30 minutes. This film thickness was about 70 nm. Then, the array glass substrate 301 and the counter glass substrate 307 were each rubbed so that the liquid crystal was 90 ° TN aligned. Rayon cloth was used as the rubbing cloth, and the rubbing pressure was 0.3 mm.

Next, spherical spacers made of plastic (for example, Micropearl: manufactured by Sekisui Fine Co., Ltd.) were uniformly dispersed on the array substrate A3. The spherical diameter of the spacer is 4 μm. A thermosetting sealant (for example, Struct Bond: manufactured by Mitsui Toatsu Chemicals, Inc.) is formed by printing on the peripheral portion of the counter glass substrate 307 by providing a liquid crystal injection port, and the array substrate A3 and the counter substrate T3 are bonded together. The sealing material was completely cured at a predetermined temperature to produce a liquid crystal cell.

Next, a nematic liquid crystal having a refractive index anisotropy of 0.097 (for example, ZLI-4792: manufactured by Merck Japan Co., Ltd.) is left-twisted with a chiral substance (for example, S-8).
11: Merck Japan Co., Ltd.) was added and the concentration was adjusted so that the twist pitch was 80 μm. The chiral nematic liquid crystal produced under such conditions is injected into a liquid crystal cell by a vacuum injection method, and after the chiral nematic liquid crystal is completely filled, the liquid crystal injection port is sealed with a sealing resin, and the array substrate A3 and the counter substrate are sealed. A polarizing plate 311 is attached to the surface of T3 so that its absorption axis is parallel to the rubbing direction,
A liquid crystal display panel was produced.

Also in the liquid crystal display panel of the present embodiment, the occurrence of the reverse tilt domain was not observed when switching from white display to black display, and the effect was confirmed. Further, since the insulating light-shielding film 305 has a light-shielding effect, it can be used as a black matrix, and on the wiring electrodes such as the source line 304 and the gate line 303 and the switching element 3.
It was possible to form a black matrix on the array substrate A3 by forming it also on 02, and it was possible to improve the aperture ratio.

In the liquid crystal display panel of the present embodiment, the insulating light-shielding film 305 is formed by using the polyester resin composed of the photopolymerizable oligomer and the photopolymerizable monomer as the main component, so that it can be easily formed by the manufacturing method. You can Further, since a polyester-based acrylate is used as the photopolymerizable oligomer, it has a low viscosity as compared with other epoxy-based acrylates, urethane-based acrylates, etc., and thus is excellent in workability.

With the above structure, the reverse tilt domain generated by the lateral electric field in the gap between the pixel electrode and the wiring electrode can be suppressed, and the deterioration of the image quality due to the reverse tilt domain can be suppressed. The pixel electrode portion can be designed to have a high aperture ratio. As a result, the display quality of the image can be improved.

[0054]

As described above, according to the present invention, the conductive thin film is electrically connected to the pixel electrode, and the conductive thin film forms the insulator layer formed between the pixel electrode and the wiring electrode. Thus, the capacitance in the substrate normal direction can be formed between the wiring electrode and the wiring electrode, and the conductive thin film can act as a black matrix due to its light shielding property.

Further, the gap between the pixel electrode and the wiring electrode and the dielectric layer formed in a part of the pixel electrode shield the region where the horizontal electric field is strongest, and the liquid crystal molecules are directly affected by the horizontal electric field. The dielectric layer thus formed can reduce the electric field strength of the lateral electric field due to the large relative permittivity.

Further, the insulating light-shielding film containing polyester as a main component formed in the gap between the pixel electrode and the wiring electrode and a part of the pixel electrode shields the region where the horizontal electric field is the strongest, and the liquid crystal molecules are It is possible to act as a black matrix due to its light-shielding property while preventing it from being directly affected by the lateral electric field.
It can be easily formed using light irradiation.

Therefore, the reverse tilt domain generated by the lateral electric field in the gap between the pixel electrode and the wiring electrode can be suppressed, the deterioration of the image quality due to the reverse tilt domain can be suppressed, and the pixel electrode part can be suppressed. Can be designed to have a high aperture ratio. As a result, the display quality of the image can be improved.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing a configuration of a liquid crystal display panel according to a first embodiment of the present invention.

FIG. 2 is a schematic view of the liquid crystal display panel of the same embodiment viewed from above.

FIG. 3 is a schematic sectional view showing a configuration of a liquid crystal display panel according to a second embodiment of the present invention.

FIG. 4 is a schematic sectional view showing a configuration of a liquid crystal display panel according to a third embodiment of the present invention.

[Explanation of symbols]

 105 conductive thin film 107 insulating film 125 conductive thin film 205 dielectric layer 305 insulating light-shielding film

Claims (6)

[Claims] 1. A liquid crystal display panel in which a liquid crystal is sandwiched between an array substrate having pixel electrodes, wiring electrodes, and switching elements and a counter substrate having counter electrodes, the liquid crystal display panel comprising the pixel electrodes and the wiring electrodes. A liquid crystal display panel, wherein an insulating layer is formed in a gap portion, and a conductive thin film having conductivity is formed on the insulating layer so as to be in contact with the pixel electrode and located around the pixel electrode. 2. The liquid crystal display panel according to claim 1, wherein the conductive thin film is made of a conductive polymer or metal having a light shielding property. 3. A liquid crystal display panel in which a liquid crystal is sandwiched between an array substrate having pixel electrodes, wiring electrodes and switching elements and a counter substrate having counter electrodes, wherein at least the pixel electrodes and the wiring electrodes are provided. A liquid crystal display panel in which a dielectric layer made of a dielectric material is formed in the gap and a part of the pixel electrode. 4. The liquid crystal display panel according to claim 3, wherein the dielectric layer is formed to have a film thickness of 0.5 μm or more and 2 μm or less. 5. A liquid crystal display panel in which a liquid crystal is sandwiched between an array substrate having pixel electrodes, wiring electrodes and switching elements and a counter substrate having counter electrodes, wherein at least the pixel electrodes and the wiring electrodes are provided. A liquid crystal display panel in which an insulating light-shielding film containing polyester as a main component is formed in the gap portion and a part of the pixel electrode. 6. The liquid crystal display panel according to claim 5, wherein the insulative light-shielding film is formed mainly of polyester composed of a photopolymerizable oligomer and a photopolymerizable monomer.