JP2002333634A - Liquid crystal display panel and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the display nonuniformity of a liquid crystal display panel and to improve the production yield. SOLUTION: The film thickness of a dummy pattern 5 is made larger than that at the intersection of a gate electrode wiring 8 and a source electrode wiring 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a liquid crystal display panel and a method for manufacturing the same.

[0002]

2. Description of the Related Art The structure of a conventional general liquid crystal display panel will be described with reference to the drawings. FIG. 3 is a plan view and a partially enlarged view showing the configuration of a conventional liquid crystal display panel, and FIG.
FIG. 4 is a diagram showing a cross section of the dotted line of FIG. In FIG. 4, a color filter substrate formed of a color filter side glass substrate 2, a color filter, a color filter pattern forming portion 13 formed of an overcoat layer, and a transparent electrode wiring, an array side glass substrate 1, and a gate electrode wiring 8, a source electrode wiring 9, a gate insulating film 7, an array substrate formed of a semiconductor film 11 and an insulating film 12. A spacer is sandwiched between these two substrates so as to keep a predetermined interval, and a sealing material 6 is formed so that the liquid crystal can be sealed in the image display portion. At this time, the sealing material also contains a spacer 10 in the sealing material so as to maintain a predetermined gap between the substrates in the sealing portion. Thereafter, the two substrates are joined, and the sealing material 6 is cured.
By including the spacer 10 in the sealing material, the line width of the sealing material 6 at the time of joining the two substrates is stabilized, the gap between the substrates around the screen of the liquid crystal display panel is stabilized, and the display unevenness is reduced. Can be suppressed.

[0003]

However, in the conventional configuration, when the intersection of the gate electrode wiring and the source electrode wiring is arranged in the sealing material forming portion as shown in FIG. 3, pressure is applied to the two substrates. At the time of cross joining, as shown in FIG. 4, stress is applied to the intersections between the gate electrode wiring and the source electrode wiring and the intersections between the gate electrode wiring and the source electrode wiring by the spacer 10 in the sealing material included in the sealing material 6. . As a result, the spacer 10 in the sealing material scratches or cuts into the wiring, thereby causing damage or disconnection and short-circuiting at the intersection. For this reason, this has caused a problem in designing a narrow frame.

According to the present invention, in order to solve the above-mentioned problem, when a pressure is applied to two substrates via the sealing material 6 and the spacer, and the two substrates are joined together, the gate electrode from the sealing material spacer 10 included in the sealing material 6 is used. By reducing the stress generated at the intersection between the wiring and the source electrode wiring and between the gate electrode wiring and the source electrode wiring, damage or disconnection thereof, and short-circuit at the intersection of the electrode wirings are prevented, and the yield is increased. In addition, by positively arranging the wiring in the sealing material forming portion, it is possible to design a liquid crystal display panel having a narrower frame than now.

[0005]

In order to solve the above-mentioned problems, a liquid crystal display panel of the present invention is a liquid crystal display panel using a thin film transistor array substrate, and includes a sealing material forming portion for bonding two glass substrates. A dummy pattern is applied to portions other than the portion where the gate electrode wiring and the source electrode wiring forming the thin film transistor element are formed, and the above-mentioned portion is more than the portion where the gate electrode wiring and the source electrode wiring intersect. It is characterized in that the thickness of the dummy pattern portion is increased.

Further, the liquid crystal display panel of the present invention is characterized in that a spacer is contained in the sealing material.

Further, in the liquid crystal display panel according to the present invention, the amount of the spacer to be contained in the sealing material is changed according to the film thickness and the pattern density of the dummy pattern portion.

The liquid crystal display panel according to the present invention is characterized in that the thickness and the pattern density of the dummy pattern portion are changed according to the amount of the spacer in the sealing material.

Further, the present invention is a method for manufacturing the above-mentioned liquid crystal panel.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) In a first embodiment of the present invention, a gate electrode wiring 8, a source electrode wiring 9, and an intersection of these electrode wirings are formed on an array substrate on which a thin film transistor element is formed. A liquid crystal display panel in which a portion is formed in a portion where a sealing material 6 is formed, the liquid crystal display having a gate electrode wiring 8 and a source electrode wiring 9 and a dummy pattern 5 having a film thickness larger than a crossing portion of the wiring. Panel. 2 via sealing material 6 and spacer
When pressure is applied to the two substrates to join them, the spacer 10 in the sealing material contained in the sealing material 6 is located above the intersection between the gate electrode wiring 8 and the source electrode wiring 9 due to the difference in the film thickness. The load is mainly supported by the spacer 10 (b) on the dummy pattern 5 having a larger thickness than the spacer 10 (a). However, if the amount of the spacer 10 in the sealing material is small or the area of the dummy pattern 5 is small, the load per one of the spacers 10 in the sealing material at the time of joining becomes relatively large. The inner spacer 10 (b) cuts into the dummy pattern 5, and the electrode wiring portion having a smaller film thickness than the dummy pattern 5 is also damaged by the spacer 10 in the sealing material. Therefore, in addition to forming the dummy pattern 5 having a large film thickness, the dummy pattern 5 having a certain area or more and the spacer 10 in the sealing material having a certain amount or more are arranged, and the gate electrode wiring 8 and the source electrode wiring 9 are formed. Need to protect.

In the case of a 7-inch liquid crystal display panel, the sealing material 6
When the formation area of the dummy pattern 5 is 12% or more with respect to the formation area, the short circuit of the electrode wiring does not occur if the spacer 10 in the sealing material is 3%. This measure reduces the stress generated at the electrode wiring and the intersection of the electrode wiring,
Damage or disconnection of the electrode wiring and short circuit at the intersection of the electrode wiring can be prevented, and a narrow frame design can be achieved.

When the thickness of the dummy pattern 5 is the same as the height of each electrode wiring and the intersection of the electrode wiring, in order to sufficiently prevent a short circuit at the intersection of the electrode wiring, the dummy pattern 5 is required.
It is necessary to increase the area or increase the blending amount of the spacer 10 in the sealing material, resulting in an adverse effect such as a decrease in seal peel strength. Furthermore, since the size of the spacer 10 in the sealing material is easily affected, the damage to each electrode wiring is reduced, and the short circuit at the wiring intersection is not prevented. The point of the present invention is to increase the area of the dummy pattern 5 having a larger film thickness than the electrode wiring and to optimize the spacer 10 in the sealing material.

(Embodiment 2) In a second embodiment of the present invention, the dummy material 5 has a shape in which the thickness and the pattern density of the dummy pattern 5 in the portion where the sealing material 6 is formed on the array substrate are constant, and the sealing material 6 is formed. A liquid crystal display panel comprising a sealing material spacer 10 therein, wherein the sealing material spacer content in the sealing material is determined with respect to the film thickness and pattern density of the dummy pattern 5 where the sealing material 6 is formed. The characteristic feature is to reduce the damage to the electrode wiring from the spacer 10 in the sealing material by changing it. As an example, in an 8-inch liquid crystal display panel, by increasing the density of the spacers 10 in the sealing material within a range where the peeling strength of the sealing material can be ensured, the area of the required dummy pattern 5 is reduced to the line width of the sealing material 6. Is about 1 mm, the sealing material 6
10% or less is sufficient with respect to the area of the substrate, and 90% or more of the sealing material forming portion can be used as an effective area for forming the electrode wiring. This enables a narrow frame design.

(Embodiment 3) In a third embodiment of the present invention, the spacers 10 in the sealing material are contained in the sealing material 6 at a fixed ratio, and the dummy pattern in the portion where the sealing material 6 is formed on the array substrate is provided. 5 is a liquid crystal display panel characterized by having a pattern with a large film thickness, wherein the thickness of the dummy pattern 5 and the pattern density are changed in the sealing material forming portion while the content of the spacer 10 in the sealing material is kept constant. The spacer 1 in the sealing material to each electrode wiring
It is characterized in that damage from zero is reduced. By ensuring the formation area of the dummy pattern 5 over a certain level and reducing the bite of the spacer 10 in the sealing material into the dummy pattern 5, the maximum peeling strength of the sealing material 6 can be ensured, and the liquid crystal display in a state of severe vibration This is particularly effective when using a panel.

Further, by forming the dummy patterns 5 in all the sealing material arrangement portions other than the electrode wiring forming portions, the uniform sealing material 6 is not affected by the difference in the wiring density caused by the difference in the number of screen pixels. A distance (gap) between substrates can be obtained, and display unevenness in a portion of the display area of the liquid crystal display panel near the seal member 6 can be prevented, so that a liquid crystal display panel with uniform display can be obtained.

[0016]

As described above, according to the present invention, the thickness of the dummy pattern is made larger than each of the electrode wirings and the intersections of the electrode wirings, and the sealing material is provided with a spacer in the sealing material. When pressure is applied to the two substrates through the material and the spacer, the load can be supported by the spacer in the sealing material and the thick portion, and as a result, the electrode wiring having a small thickness and the intersection of the electrode wiring can be obtained. It is possible to reduce the stress generated in the portion, and prevent damage and disconnection of each electrode wiring, or short circuit at the intersection of the electrode wirings. In addition, by controlling the spacer content in the sealing material in the sealing material and the area of the portion where the thickness of the dummy pattern is increased, the sealing material forming portion can be effectively used as an electrode wiring portion, and a narrow frame design is provided. Becomes possible. In addition, by forming dummy patterns in all the sealant arrangement portions other than the electrode wire formation portions, a uniform inter-substrate distance (gap) can be obtained when the sealant is not affected by differences in wiring density. Display unevenness in the portion of the display area near the sealing material can be prevented,
A liquid crystal display panel having a uniform display can be obtained.

[Brief description of the drawings]

FIG. 1A is a plan view showing a first embodiment of the present invention, and FIG.

FIG. 2 is a partial sectional view showing a first embodiment of the present invention.

FIG. 3A is a plan view showing a conventional example, and FIG.

FIG. 4 is a partial sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Array side glass substrate 2 Color filter side glass substrate 3 Effective screen area 4 IC 5 Dummy pattern 6 Sealing material 7 Gate insulating film 8 Gate electrode wiring 9 Source electrode wiring 10 Spacer in sealing material 11 Semiconductor film 12 Insulating film 13 Color filter pattern Forming part

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01L 21/90 J F term (Reference) 2H089 LA15 LA20 LA49 NA48 QA14 2H092 JB22 JB26 JB31 NA15 NA16 PA03 PA04 5F033 VV01 VV15 XX00 XX19 XX31 5F110 AA26 BB01 EE37 HM19 QQ01 QQ19

Claims (5)

[Claims] 1. A liquid crystal display panel using a thin film transistor array substrate, wherein a gate electrode wiring and a source electrode wiring for forming the thin film transistor element are formed in a sealing material forming portion for bonding two glass substrates. A liquid crystal display panel, wherein a dummy pattern is applied to a portion other than the portion where the dummy pattern is formed, and a film thickness of the dummy pattern portion is larger than a portion where the gate electrode wiring and the source electrode wiring intersect. 2. The liquid crystal display panel according to claim 1, wherein a spacer is included in the sealing material. 3. The liquid crystal display panel according to claim 2, wherein the amount of the spacer contained in the sealing material is:
A liquid crystal display panel, wherein the liquid crystal display panel is changed according to a film thickness and a pattern density of the dummy pattern portion. 4. The liquid crystal display panel according to claim 2, wherein the thickness and the pattern density of the dummy pattern portion are changed according to the amount of the spacer in the sealing material. panel. 5. A method for manufacturing a liquid crystal display panel according to claim 1, wherein