JPH1144881A - Liquid crystal display device and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a display grade and to reduce a production cost by arranging layers (BM) consisting of a resin material in the positions corresponding the parts between color filter layers on a transparent conductive film. SOLUTION: The surface of a counter substrate 12 is provided with the color filter layers 18 of plural colors and counter electrodes 19 corresponding to respective picture element electrodes 17 on one surface 11. The resins BM of the prescribed thickness consisting of a light shieldable black resin, etc., are disposed on the counter electrodes 19 between the respective color filter layers 18. A liquid crystal layer 13 held between the substrates of this device is driven by the potential difference between the individual picture element electrodes 17 and the counter electrodes 19 on the counter substrate 12. At this time, the counter electrodes 19 on the counter substrate 12 corresponding to the parts between the picture element electrodes 17 are recessed to a recessed shape, into which the resins BM 20 are embedded. Then, the capacity between the counter electrodes 19 and source bus lines 14 is increased and the diagonal components of the electric fields between the counter electrodes 19 and the peripheral parts of the picture element electrodes 17 are increased as well.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a liquid crystal display device used for a display of OA equipment or AV equipment and a method of manufacturing the same.

[0002]

2. Description of the Related Art An outline of a conventional liquid crystal display device will be described with reference to the drawings, taking a thin film transistor type active matrix drive liquid crystal display device as an example. 7A is a perspective view of a conventional liquid crystal display device, and FIG. 7B is a cross-sectional view of the liquid crystal display device of FIG.

[0003] Such a liquid crystal display device has one substrate 21
The opposing substrate 22 is arranged to face a certain interval. Further, a liquid crystal layer 23 is provided between the two substrates 21 and 22. The one substrate 21 includes switching elements including a source bus line 24, a gate bus line 25 arranged in a matrix, and a thin film transistor 26 arranged at an intersection thereof. Furthermore, a plurality of pixel electrodes 27 to which a voltage for controlling the alignment direction of the liquid crystal molecules in the liquid crystal layer 23 is provided are provided.

On the other hand, the counter substrate 22 is provided with a plurality of color filters 28 and counter electrodes 29 corresponding to the respective pixel electrodes 27 on the one substrate 21, and between the color filter layers 28. Is a light shielding material and has a black matrix layer (hereinafter, referred to as BM) 31.
In such a liquid crystal display device, a signal voltage is sequentially applied to each of the bus lines 24 and 25, and switching is performed by an element including a thin film transistor 26 and the like arranged at the intersection of the bus lines 24 and 25. Is written and held for a certain period. Such individual picture element electrodes 2
The liquid crystal layer 23 sandwiched between the substrates 21 and 22 is driven by the potential difference between the substrate 7 and the opposite electrode 29 on the opposite substrate 22.

[0005] Two general methods for fabricating the opposing substrate 22 having such a color filter layer 28 will be described with reference to the drawings. FIGS. 8A and 9A are flowcharts showing a general manufacturing process of a counter substrate provided with a color filter layer, and FIGS. 8B and 9B.
FIG. 2 is a plan view and a cross-sectional view of a counter substrate corresponding to the manufacturing process.

Here, a description will be given focusing on the creation method of FIGS. 8 (a) and 8 (b). A resin film (hereinafter, referred to as a dry film) in which a red (hereinafter, referred to as R) pigment is dispersed is supplied onto a glass substrate 30 and attached (hereinafter, referred to as a laminate), exposed, developed, and baked. After such a process,
An R pattern 28a is formed.

Further, a dry film in which a green (hereinafter, referred to as G) pigment is dispersed is laminated on the R pattern 28a, and a G pattern 28b is formed through processes such as exposure, development, and baking. I do.

Then, the same steps as those for R and G are repeated to form a blue (hereinafter, referred to as B) pattern 28c and a color filter layer 28 of three colors. Here, the process using the dry film in which the pigment is dispersed has been described. However, as shown in FIGS. 9A and 9B, the entire surface is applied by the spin coating method using the resin material in which the pigment is dispersed. It may be a method.

Thereafter, lamination is performed using a dry film in which carbon is dispersed and mixed, and exposure is performed from the back using the color filter layer 28 as a mask, and a pattern of the BM 31 is formed through development and baking steps. Then, a transparent conductive film (ITO) to be the counter electrode 29 is formed on the entire surface,
The counter substrate 22 is manufactured. Note that, as such a BM 31, one using a metal film as shown in FIGS. 9A and 9B is generally known.

Here, the shape of the common transition portion in such a conventional liquid crystal display device will be described with reference to the drawings. FIG. 10A is a plan view and a cross-sectional view showing a common transition portion on the one substrate 21 side in the conventional liquid crystal display device, and FIG. 10B is a plan view showing the common substrate on the counter substrate 22 side in the conventional liquid crystal display device. FIG. 2 is a plan view and a cross-sectional view showing a common transition portion of FIG.

[0011] As shown in FIG.
On the side, the common transition electrode 35 is formed between the source driver connection blocks of the source terminal lead-out portion. The common transfer electrode 35 is connected to a common line at a peripheral portion of the display panel, and is further connected to the counter substrate 22 by the carbon paste 36. The number of the common transfer electrodes 35 is determined by the definition and size of the panel, the difference in resistance from the transparent electrode on the opposite side, and the like. For example, a panel of about 10-inch VGA usually has about 4 to 8 pieces. It is generally done.

As shown in FIG. 10B, on the counter substrate 22 side, mask deposition is performed so that ITO 29 remains at a position facing the common transfer electrode 34 formed on the one substrate 21 side. Conduction with the carbon paste 36 on the substrate 21 is performed. It is also conceivable to deposit the ITO 29 on the entire surface of the counter substrate 21 side without performing the mask deposition. However, the laminated structure state of the conductive portion is the counter substrate / BM / ITO / carbon paste, and the ITO film is formed. The structure is the same irrespective of the film method (mask deposition, full surface deposition).

The opposing substrate 22 and the one substrate 21 manufactured in this manner are provided with a sealing material 33 around the periphery thereof while maintaining a certain distance therebetween, and a liquid crystal layer 23 is provided in a gap between the two substrates 21 and 22. The liquid crystal display device is manufactured by being supplied and sealed. At this time, for example, in a liquid crystal display device using a TN liquid crystal, the interval between both substrates 21 and 22 is generally set to 4 to 6 μm, and in this case, 4.5 to 7 μm
The dielectric beads are formed by spraying dielectric beads having a diameter on the entire surface of one of the substrates, and the dielectric beads including the pixel electrodes 27 are dispersed in an unspecified manner as long as no particular aggregation or the like occurs. Have been.

Next, a second conventional example having a counter electrode structure different from that of the above-described liquid crystal display device will be described. Japanese Patent Publication No. 2520595 discloses a structure in which a counter electrode has a stripe shape in order to reduce display defects.

As a third conventional example, Japanese Patent Application Laid-Open No.
JP-A-49494 and JP-A-7-20497 will be described. These are aimed at improving the display quality by reducing the reverse tilt domain region, which is an abnormal direction control of the liquid crystal molecules caused by the alignment processing defect formed in the alignment film forming process due to the step structure near the bus line. The former defines the angle of the step on the substrate surface,
The latter discloses that a concave groove is formed on the surface between adjacent pixel electrode portions.

Further, as a fourth conventional example, Japanese Patent Laid-Open Publication No.
No. 82795 and JP-A-8-328020 will be described. These are intended to improve the display quality by reducing the number of beads placed on the surface of the pixel electrode part, giving a potential difference between the wiring area such as metal and other areas, and applying beads to specific locations. Is attached.

[0017]

In the above-mentioned first conventional example, the source bus line 24 and the counter electrode 29 are connected to each other as shown in FIG.
As shown in (b), a signal delay on the bus line 24 occurs due to the capacitive coupling 210 between the bus line 24 to which the signal has been input and the counter electrode 29, which has a capacitance component interposed only in the liquid crystal layer 23. A difference in writing voltage occurs between the signal input terminal side and the signal non-input terminal side on the bus line 24, which causes deterioration in display quality as a liquid crystal display device.

The pixel electrode 27 is not only affected by the region of the opposing electrode 29 immediately above it, but is also affected by the electric field from the entire surface of the opposing electrode 29. This point will also be described with reference to FIG. 7B. The liquid crystal molecules near the point B on the pixel electrode 27 are affected by the points D, E, F, and the like on the counter electrode 29 nearby. It is also strong, and is affected by the electric field including those oblique components, which is one of the causes of the disturbance of the orientation of the liquid crystal molecules.

For this reason, in the peripheral portion of the pixel electrode 24, such as the point B, the transmitted light emitted from the backlight light source and incident on the region of the pixel electrode 24 is scattered. Had reduced the contrast.

To improve the effect of the electric field of the oblique component, a stripe-shaped counter electrode structure as in the second conventional example can be considered. However, a photolithography step and an etching step are required to form a pattern of the counter electrode, and this leads to an increase in the number of steps and a decrease in yield, and an increase in product cost. Further, in a large-sized or high-definition liquid crystal display device, the wiring resistance of the counter electrode is increased, and the display quality is reduced.

Further, in the structure on the one substrate side as in the third conventional example, although the reverse tilt domain is reduced, the influence of the electric field of the oblique component from the counter electrode as described above is not solved. Therefore, the reverse tilt domain cannot be completely suppressed.

Further, in the fourth conventional example, since the wiring is charged individually, it takes time to align the charging terminals with a substantially uniform pressure. In a high-definition liquid crystal display device, fine wiring is required. As a result, the terminal may be damaged at the time of contact with the terminal to cause disconnection. Further, depending on the structure of the liquid crystal display device, uniform charging is difficult, and a special wiring structure and a special step are provided, which leads to an increase in cost.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a liquid crystal display device capable of improving display quality and reducing manufacturing costs, and a method of manufacturing the same.

[0024]

According to the liquid crystal display device of the present invention, a plurality of color filter layers are arranged on one of a pair of substrates opposed to each other with a liquid crystal layer interposed therebetween. A transparent conductive film is formed on the filter layer, and a black matrix layer made of an insulating material is formed on the transparent conductive film and at a position corresponding to between the respective color filter layers. Thereby, the above object is achieved.

At this time, the thickness of the black matrix layer is preferably equal to or less than the thickness of the color filter layer.

Further, at least one of the color filter layers of a plurality of colors formed on the one substrate has a common transition portion for conducting between a pair of substrates facing each other with the liquid crystal layer interposed therebetween. Preferably, it is formed.

According to the method of manufacturing a liquid crystal display device of the present invention, one of a pair of substrates opposed to each other with a liquid crystal layer interposed therebetween is provided with:
A step of forming a plurality of color filter layers, a step of forming a transparent conductive film on the color filter layer, and a step of forming a black resin film on the transparent conductive film; Remove the black resin film formed at a position other than the position corresponding to
And a step of forming a black matrix layer, whereby the object is achieved.

At this time, the transparent conductive film formed on the one substrate is charged to a positive or negative potential, and granular dielectric beads charged to the same polarity as the potential are placed on the one substrate. And adhering the dielectric beads on the black matrix.

In the step of forming a plurality of color filter layers on the one substrate, at least one of the plurality of color filter layers faces each other with the liquid crystal layer interposed therebetween. It is also preferable to form them at a common transition portion for conducting between a pair of substrates.

The operation of the present invention will be described below.

In the liquid crystal display device of the present invention, a transparent conductive film is disposed on the color filter layer without any intervening flattening film or the like. Therefore, the electrode formed by the transparent conductive film forms a concave portion between the pixel electrode portions corresponding to the color filter layer, and the projection on the substrate surface formed in the final structure is few and the alignment film is formed on the pixel electrode. Can be appropriately performed.

Further, since such a concave portion is formed by utilizing the surface structure of the lower color filter layer, there is no need to add a special concave portion forming step or members, and the device can be manufactured at low cost. A black matrix layer made of a resin material (hereinafter referred to as resin B)
Called M. ) Is arranged. Therefore, the capacitance between the source bus line and the pixel electrode becomes a coupling capacitance via the resin BM in addition to the liquid crystal layer, and it is possible to eliminate the signal delay via the conventional capacitance. Furthermore, the electric field component in the oblique direction from the counter electrode to the peripheral portion of the picture element electrode is reduced as compared with the related art, the reverse tilt domain is reduced, and the display quality can be improved.

Further, since the opposing electrode is continuous over substantially the entire surface of the opposing substrate, and a partially insulative black matrix layer is formed thereon, a voltage can be easily applied without damaging the opposing electrode. On the surface of the substrate, a potential difference between the color filter region and the other region can be easily generated. Therefore, it is possible to easily and selectively arrange the charged fine particles.

By making the thickness of the BM layer equal to or less than the thickness of the color filter layer, the number of protrusions on the surface of the counter substrate can be reduced. Therefore, since the alignment process formed on the counter electrode can be made uniform, the reverse tilt region can be eliminated.

Further, when the color filter pattern is formed, the color filter is formed to extend to a position corresponding to the common transition electrode formed on the one substrate side. A good conduction state (common transition) can be ensured. At this time, by stacking a plurality of color filters, the cell thickness at the common transition portion is reduced, and the amount of carbon paste used and high reliability with respect to short circuits are high. Can also be secured.

In the method of manufacturing a liquid crystal display device according to the present invention, a transparent conductive film is formed on a color filter layer without a flattening film or the like interposed therebetween. Therefore, the electrode formed by the transparent conductive film has a concave portion formed between the pixel electrode portions corresponding to the color filter layer, and the projection on the substrate surface formed in the final structure is small, and the alignment film on the pixel electrode is formed. Done properly. In addition, since such a concave portion is formed using the surface structure of the lower color filter layer, it is not necessary to add a special concave portion forming step or a member, and it is possible to manufacture the concave portion at low cost.

A resin BM layer is formed on such a concave portion. Therefore, the capacitance between the source bus line and the pixel electrode becomes a coupling capacitance via the resin BM in addition to the liquid crystal layer,
It is possible to eliminate the signal delay via the capacitor as in the related art. Further, the electric field component in the oblique direction from the counter electrode to the peripheral portion of the pixel electrode is reduced as compared with the conventional case, and the reverse tilt domain is reduced, so that the display quality can be improved.

Further, the transparent conductive film on the one substrate is charged to a positive or negative potential, and granular dielectric beads charged to the same polarity as the potential are supplied onto the one substrate, By depositing many of the dielectric beads on the BM, the dielectric beads can be easily placed only on the BM,
Can be supplied selectively. Therefore, scattering of light transmitted through the liquid crystal layer over the pixel electrode is reduced, and a high-quality liquid crystal display device can be manufactured.

Further, when forming the pattern of the color filter, the color filter is formed to extend to a position corresponding to the common transition electrode formed on the one substrate side. A good conduction state (common transition) with the opposing substrate can be ensured. At this time, by stacking a plurality of color filters, the cell thickness at the common transition portion becomes small, and the amount of carbon paste used and short-circuiting occur. High reliability can be ensured.

[0040]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a liquid crystal display device of the present invention and a method of manufacturing the same will be described with reference to the drawings.
FIG. 1A is a perspective view of the liquid crystal display device according to the present embodiment, and FIG. 1B is a cross-sectional view taken along line AA of the liquid crystal display device of FIG. FIG. 2 (a)
FIG. 2 is a flowchart showing a manufacturing process of a counter substrate provided with a color filter layer in the present embodiment, and FIG.
FIG. 2B is a plan view and a cross-sectional view of the counter substrate corresponding to the manufacturing process. FIG. 3 is a cross-sectional view of the counter substrate showing a step of dispersing dielectric beads for maintaining the thickness of the liquid crystal cell in the present embodiment.

First, the perspective view shown in FIG.
This embodiment will be described with reference to the cross-sectional view shown in FIG.

On the other hand, the substrate 11 and the opposing substrate 12 are opposed to each other with a certain space therebetween. A liquid crystal layer 13 is provided between the two substrates 11 and 12. On the other hand, on the one substrate 11, a switching element including a source bus line 4, a gate bus line 15, and a thin film transistor 16 arranged at an intersection thereof is provided. Further, the liquid crystal layer 13
A plurality of pixel electrodes 17 to which a voltage for controlling the arrangement direction of the liquid crystal molecules therein is applied are also provided.

On the other hand, on the counter substrate 12, the one substrate 11
1.4 to 1.5 μ corresponding to each of the pixel electrodes 17 above
a plurality of color filter layers 18 having a thickness of about m and a counter electrode 19.
And on the counter electrode 19,
Made of light-shielding black resin, etc., 1.2 to 1.4 μm
A resin BM20 having a thickness of about the same is provided. In such a liquid crystal display device, a signal voltage is sequentially applied to each of the bus lines 14 and 15, and switching is performed by an element including a thin film transistor 16 at the intersection thereof, and a specific signal voltage is written for each pixel electrode 17. Hold for a certain period.

In this way, the liquid crystal layer 13 sandwiched between the substrates is driven by the potential difference between each of the pixel electrodes 17 and the counter electrode 19 on the counter substrate 12. At this time, on the opposite substrate 12 corresponding to between the pixel electrodes 17, the opposite electrode 19 is concavely recessed and the resin BM 20 is embedded. Therefore, the capacitance between the opposing electrode 19 and the source bus line 14 increases, and the oblique component of the electric field between the opposing electrode 19 and the peripheral portion of the pixel electrode 17 is reduced. , A liquid crystal display device having a good quality can be realized.

At this time, the thickness of the resin BM 20 is equal to or less than the thickness of the color filter
When the resin 20 is formed so as to completely fill the concave portion of the above-mentioned counter electrode 19 and have a flat surface with no protrusion from the surface, the light shielding property of the resin BM 20 becomes good and the alignment process is performed uniformly. The display quality can be further improved.

In this embodiment, an active matrix driving liquid crystal display device in which gate bus lines and source bus lines are formed on the same substrate has been described as an example. However, the present invention is not limited to this, and the source bus lines may be formed in stripes. The present invention can be applied to a liquid crystal display device of a simple matrix type or a liquid crystal display device formed on a counter substrate on a side different from the gate bus line forming substrate.

Next, the manufacturing method according to the present embodiment will be described with reference to a flowchart shown in FIG. 2A, a plan view and a sectional view shown in FIG. 2B, and a sectional view shown in FIG.

First, as shown in FIGS. 2 (a) and 2 (b), a dry film in which an R pigment is dispersed is laminated on the counter substrate 11, and a predetermined R pattern is formed through exposure, development and baking steps. 18a is formed. Through similar steps, a G pattern 18b and a B pattern 18c are formed.

Next, ITO serving as the counter electrode 19 is laminated thereon, and a black dry film is laminated.
R, G, B patterns 18 already formed in that state
Exposure is performed from the back surface of the substrate using a, 18b, and 18c as a mask to form a predetermined resin BM20 pattern.

As described above, by combining the dry film method and the back surface exposure, the resin B having a predetermined thickness and area is obtained.
M20 can be precisely manufactured without requiring an extra mask,
It can be formed easily, and a flat substrate surface with few projecting portions of the resin BM 20 can be formed.

Subsequently, a polyimide as an orientation film 50 is printed thereon and subjected to a rubbing treatment. Next, as shown in FIG. 3, a positive voltage is applied to the opposing electrode 19, and in a state of being positively charged, the dielectric beads 51 for maintaining the thickness of the liquid crystal cell are also positively charged, and Spray.
In this manner, the dielectric beads 51 are repelled by the electrostatic force at the opposing electrode portion on the color filter layer 18 opposing the picture element electrode 17 and are selectively disposed on the resin BM 20.

In the configuration of the present invention as described above,
If the structure of the common transfer portion on the side of the opposing substrate 12 is unchanged, the laminated structure of the opposing substrate / ITO / BM / carbon paste will be formed, and conduction with the substrate 11 cannot be performed. However, performing new processing solely for this purpose also causes problems such as an increase in the number of steps. Therefore, it is necessary to secure a good conduction state without increasing the number of steps.

Therefore, the structure of the common transition portion of the present invention will be briefly described with reference to the drawings. FIG. 4A is a plan view showing a common transition portion on the counter substrate side in the liquid crystal display device of the present embodiment, and FIG.
FIG. 4C is a sectional view taken along the line BB of FIG.

As shown in FIGS. 4 (a), 4 (b) and 4 (c), a dry film in which a red (R) pigment is dispersed is laminated on the opposing substrate 11, and exposed to light, developed and baked to obtain a predetermined film. The R pattern 18a is formed, and the G pattern 18b and the B pattern 18c are formed through the same steps. When the color filter 18 is formed, the common transfer pattern formed on one substrate 11 side is formed. The color filter 18 is formed to extend to a position corresponding to the electrode.

Then, ITO serving as the counter electrode 19 is laminated thereon, and a black dry film is laminated. In this state, each of the R, G, and B patterns 18a,
Exposure is performed from the back surface of the substrate using the masks 18b and 18c as masks to form a predetermined resin BM20 pattern. When the resin BM20 pattern is formed, the color filter 18 is located at a position corresponding to the above-described common transition portion. Is formed, the resin BM20 is not formed. That is, as shown in FIG. 4C, in the panel peripheral portion in the present invention, the laminated structure state of the common transition portion is such that the counter substrate / color filter layer / ITO / carbon paste is used. The laminated structure state of the location is opposite substrate / ITO / resin BM, and therefore, it is possible to ensure a good conduction state between the one substrate 11 and the opposite substrate 12.

In the structure of the common transfer portion in the above-described embodiment, for example, as shown in FIGS. 5A and 5B, when the pattern of the color filter 18 is formed, The plurality of color filters 18a, 1a are arranged at positions corresponding to the formed common transition electrodes.
8b may be extended, and in this case, the laminated structure state of the common transition portion is opposite substrate / color filter layer / color filter layer / ITO / carbon paste, so that the transmittance at the common transition portion is reduced. Compared with the case of forming a single color, it is possible to significantly reduce.

Generally, this common transition portion is formed on one side of the substrate 1.
Although the light is shielded by the common transfer electrode on one side, there is a possibility that light leakage may occur due to the panel bonding process and the like. It is desirable to reduce the transmittance by laminating a plurality of layers. Therefore, R,
G, B, three color filters 18a, 18b, 18
By laminating c, it is possible to further reduce the maximum transmittance, as can be seen from the table shown in FIG.

For example, in a normal TN liquid crystal mode or the like, the cell thickness is generally about 4.5 μm. However, as in the present invention, two or three color filters 18 are provided at the common transition portion. Since the thickness of the cell at the common transition portion is reduced by adopting the laminated structure of the above, it is possible to secure high reliability regarding the amount of the carbon paste 36 used and short circuit.

[0059]

As described above, according to the liquid crystal display device of the present invention, the transparent conductive film is disposed on the color filter layer, and the transparent conductive film is disposed on the transparent conductive film. A black matrix layer made of a resin material is arranged at a position corresponding to the space therebetween. This allows
A concave portion can be easily formed in a portion other than the pixel region of the transparent conductive film, and a black matrix layer made of a resin that also functions as a light shield is formed in the concave portion, so that the capacitance between the counter electrode and the bus line is reduced. As a result, unnecessary horizontal electric field components applied to the pixel electrodes can be reduced, so that the display quality of the liquid crystal display device can be improved.

According to the method of manufacturing a liquid crystal display device of the present invention, a transparent conductive film is formed on a color filter layer, and a film-like black resin film is disposed on the transparent conductive film. By forming a black matrix layer between the color filter layers, the thickness of the black matrix layer is stabilized, and it can be formed easily with high accuracy and a small number of protrusions. Since it can be formed, the display quality of the liquid crystal display device can be improved.

According to the method of manufacturing a liquid crystal display device of the present invention, a transparent conductive film is formed on a color filter layer without a flattening film or the like. Therefore, the electrode formed by the transparent conductive film has a concave portion formed between the pixel electrode portions corresponding to the color filter layer, and the projection on the substrate surface formed in the final structure is few and the alignment film is formed on the pixel electrode. Is done properly. In addition, since such a concave portion is formed using the surface structure of the lower color filter layer, it is possible to manufacture the concave portion at a low cost without requiring any special concave portion forming step or additional member.

In addition, the transparent conductive film on the one substrate is charged to a positive or negative potential, and granular dielectric beads charged to the same polarity potential as the potential are supplied onto the one substrate, By depositing many of the dielectric beads on the BM, the dielectric beads can be easily placed only on the BM,
Can be supplied selectively. Accordingly, scattering of light transmitted through the liquid crystal layer over the pixel electrode is reduced, and a high-quality liquid crystal display device can be manufactured.

Further, when the color filter pattern is formed, the color filter is formed to extend to a position corresponding to the common transition electrode formed on the one substrate side. A good conduction state (common transition) can be ensured. At this time, by stacking a plurality of color filters, the cell thickness at the common transition portion is reduced, and the amount of carbon paste used and high reliability with respect to short circuits are high. Can also be secured.

[Brief description of the drawings]

FIG. 1 is a perspective view and a cross-sectional view of a liquid crystal display device according to an embodiment of the present invention.

FIG. 2A is a flowchart showing a manufacturing process of a counter substrate provided with a color filter layer in the present embodiment, and FIG. 2B is a flowchart of a counter substrate corresponding to the manufacturing process. It is a top view and a sectional view.

FIG. 3 is a cross-sectional view of the counter substrate showing a step of dispersing dielectric beads for maintaining the thickness of the liquid crystal cell in the present embodiment.

FIG. 4A is a plan view showing a common transition portion on the counter substrate side in the liquid crystal display device of the present invention.
FIG. 4B is a sectional view taken along the line AA, and FIG.
FIG. 4 is a cross-sectional view taken along line B.

FIG. 5 (a) is a plan view illustrating another common transition portion on the side of another counter substrate in the liquid crystal display device of the present invention,
FIG. 5B is a sectional view taken along the line BB.

FIG. 6 is a table showing transmittance according to a difference in a lamination color.

FIG. 7A is a perspective view of a conventional liquid crystal display device, and FIG. 7B is a cross-sectional view of the liquid crystal display device of FIG.

FIG. 8A is a flowchart showing a general manufacturing process of a counter substrate provided with a color filter layer, and FIG. 8B is a plan view of the counter substrate corresponding to the manufacturing process. FIG.

9A is a flowchart showing a general manufacturing process of a counter substrate having a color filter layer, and FIG. 9B is a plan view of the counter substrate corresponding to the manufacturing process. FIG.

FIG. 10A is a plan view and a cross-sectional view showing a common transition portion on one substrate side in a conventional liquid crystal display device, and FIG. 10B is a cross-sectional view thereof. It is the top view which showed the common transfer part on the board | substrate side, and its sectional drawing.

[Explanation of symbols]

 Reference Signs List 11 one substrate 12 counter substrate 13 liquid crystal layer 14 source bus line 15 gate bus line 16 thin film transistor 17 picture element electrode 18 color filter layer 18a red color filter layer 18b green color filter layer 18c blue color filter layer 19 counter electrode 20 resin BM 21 One substrate 22 Counter substrate 23 Liquid crystal layer 24 Source bus line 25 Gate bus line 26 Thin film transistor 27 Pixel electrode 28 Color filter layer 28a Red color filter layer 28b Green color filter layer 28c Blue color filter layer 29 Counter electrode 30 Glass substrate 31 Resin BM 33 Sealing material 34 Common transfer electrode (opposite side) 35 Common transfer electrode (one side) 36 Carbon paste 110 Capacitance between source bus line and counter electrode 210 Capacitance between bus lines and the counter electrode

Claims (6)

[Claims] A plurality of color filter layers disposed on one of a pair of substrates opposed to each other with a liquid crystal layer interposed therebetween; a transparent conductive film formed on the plurality of color filter layers; A liquid crystal display device, wherein a black matrix layer made of an insulating material is formed on the transparent conductive film and at a position corresponding to between the color filter layers. 2. The liquid crystal display device according to claim 1, wherein the thickness of the black matrix layer is equal to or less than the thickness of the color filter layer. 3. A liquid crystal display according to claim 1, wherein at least one of the color filter layers of a plurality of colors formed on said one substrate also has a common transition portion for conducting between a pair of substrates facing each other with said liquid crystal layer interposed therebetween. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is formed. 4. a step of forming a plurality of color filter layers on one of a pair of substrates opposed to each other with a liquid crystal layer interposed therebetween; and a step of forming a transparent conductive film on the color filter layers. While forming a black resin film on the transparent conductive film,
Removing the black resin film formed at a position other than at least between the respective color filter layers to form a black matrix layer. 5. The transparent conductive film formed on the one substrate is charged to a positive or negative potential, and granular dielectric beads charged to the same polarity as the potential are placed on the one substrate. 5. The method according to claim 4, wherein the dielectric beads are supplied to adhere the dielectric beads on the black matrix. 6. A step of forming a plurality of color filter layers on the one substrate, wherein at least one of the plurality of color filter layers faces each other with the liquid crystal layer interposed therebetween. The method for manufacturing a liquid crystal display device according to claim 4, wherein the liquid crystal display device is formed also at a common transition portion that conducts between a pair of substrates.