JP3157112B2 - Liquid crystal display element spacer, method of manufacturing the same, and liquid crystal display element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spacer for a liquid crystal display element capable of obtaining a stable display image, a method for manufacturing the same, and a liquid crystal display element using the spacer for a liquid crystal display element.

[0002]

2. Description of the Related Art As shown in FIG. 1, a spacer for a liquid crystal display element is used to form a constant gap between two transparent substrates constituting a liquid crystal display panel. Such a liquid crystal display element spacer, in the manufacturing process, so that the desired particle size becomes the average particle size,
Those that are distributed within a certain moderate range are manufactured. JP-B-6-17373 discloses that in a hydrophilic organic liquid,
A method for producing fine particles having a narrow particle size distribution by polymerizing a vinyl monomer in the presence of a polymer dispersant has been disclosed.

However, as described above, even if the fine particles are manufactured to have a desired particle size in the polymerization step, the fine particles containing too small or too large particles are contained. When used as a spacer for liquid crystal display, the image quality of the liquid crystal display element may be degraded. Therefore, a spacer classified based on the size of the particle diameter is usually used as the spacer for liquid crystal display element.

The particle size distribution of the spacer for a liquid crystal display element thus manufactured is generally represented by a normal distribution irrespective of the type of polymerization method and classification method. Therefore, in such a liquid crystal display element spacer, both the fine particles larger than the average particle diameter and the fine particles smaller than the average particle diameter are present in substantially the same amount.

Since the surface of the substrate of the liquid crystal display element is not completely smooth and slightly uneven, even if the liquid crystal display element spacer has a variation in particle diameter,
Somewhat acceptable. However, particles that are too small
Since it hardly participates in gap formation, it does not affect gap formation, but the amount of dispersion on the substrate becomes unnecessarily large. In addition, since the liquid crystal display element spacer is originally a foreign substance in the liquid crystal, there is a problem that the image quality of the liquid crystal display element may be deteriorated due to the existence of many elements which are not involved in gap formation. .

Recently, a method of increasing the accuracy of the cell gap by reducing the standard deviation in the particle size distribution of the spacer has been generally used. But,
If the standard deviation is too small, when the liquid crystal display element is exposed to a high temperature, the cell gap may become large due to the effect of the volume expansion of the liquid crystal. The element spacer cannot function as a gap material. In addition, when the liquid crystal display element is used for a long time, there is a problem that the spacer easily moves due to an increase in environmental temperature.

Therefore, in order to stabilize the cell gap in a wide temperature range, it is preferable that the spacer for a liquid crystal display element has a certain degree of particle diameter variation.
In order to reduce useless fine particles, the fine particles preferably have a uniform particle diameter.

[0008]

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a spacer for a liquid crystal display element capable of securing a stable display image under a wide use environment with a small amount of dispersion, a method of manufacturing the same, and It is another object of the present invention to provide a liquid crystal display device capable of maintaining stable display image quality.

[0009]

The present invention relates to a spacer for a liquid crystal display element having elasticity, wherein the average particle diameter in the particle diameter distribution of the spacer for the liquid crystal display element is 1 to 1.
Liquid crystal display wherein the standard deviation in the particle size distribution on the side smaller than the mode particle size in the particle size distribution is smaller than the standard deviation in the particle size distribution on the side larger than the mode particle size in the particle size distribution. This is an element spacer. Hereinafter, the present invention will be described in detail.

[0010] The spacer for a liquid crystal display element of the present invention has elasticity. By having elasticity, when the cell gap of the liquid crystal display element is set to be equal to or less than the average particle diameter of the spacer for the liquid crystal display element, the movement of the spacer can be prevented.

The spacer for a liquid crystal display element of the present invention has an average particle diameter in the particle diameter distribution of 1 to 100 μm. If it is less than 1 μm, it is easy to aggregate, and if it exceeds 100 μm, it is rarely used, so it is limited to the above range.

In the spacer for a liquid crystal display element of the present invention, the standard deviation in the particle diameter distribution on the side smaller than the mode particle diameter in the particle diameter distribution is smaller than the standard deviation in the particle diameter distribution on the side larger than the mode particle diameter. It is smaller than the deviation. The particle size distribution of the liquid crystal display element spacer of the present invention,
In FIG. 2, as indicated by the solid circles, the particle size distribution on the side smaller than the mode particle size is sharper than the particle size distribution on the side larger than the mode particle size. That is,
When the standard deviation in the particle size distribution on the side smaller than the mode particle size is σ ′ and the standard deviation in the particle size distribution on the side larger than the mode particle size is σ, σ ′ <σ
It is expressed as

Here, the standard deviation σ representing the particle size distribution on the side larger than the mode particle size is an important factor that determines the working conditions for assembling the liquid crystal display element as in the conventional spacer. It is preferably the same as the normal standard deviation of the elastic liquid crystal display element spacer, and more preferably 3 to 6% of the average particle diameter. If it ’s too small,
When the temperature environment changes, the spacer cannot cope with the expansion of the cell gap. If the spacer is too large, normal display of the liquid crystal display element is hindered due to abrasion of the inner surface of the substrate due to the largest particle diameter represented by 3σ. There is a possibility that.

In the present invention, even if the statistically processed standard deviation is appropriate, if the normality of the actual particle size distribution is greatly deteriorated, the spacers dispersed in the liquid crystal display element (generally 50 to 300) are used. Pcs / mm ² ) The relationship between the load applied to the whole and the compressive deformation becomes irregular, making it difficult to stably form and maintain the cell gap.

When the difference between σ ′ and σ becomes small,
There is no significant difference compared with the conventional spacer, and the effect of the present invention cannot be exhibited. The lower limit of σ ′ is determined by the standard deviation of a group of fine particles classified into an average particle diameter smaller than the mode particle diameter, which is blended as follows. Practically, the smaller the better. The average particle diameter and the amount of the fine particle group classified into the average particle diameter smaller than the mode particle diameter are determined so as to satisfy the above conditions.

In the spacer for a liquid crystal display element of the present invention, a particle size distribution of the spacer for a liquid crystal display element becomes a specific distribution by blending two or more kinds of fine particles classified based on the particle diameter. The method for producing a spacer for a liquid crystal display element having elasticity produced as described above, wherein the average particle diameter of the particle diameter distribution is 1 to 100 μm, and classified into an average particle diameter smaller than the mode particle diameter. The standard deviation in the particle size distribution of the group of fine particles (hereinafter referred to as “small particles”) is larger than the standard deviation of the group of fine particles (hereinafter referred to as “large particles”) classified into an average particle size larger than the mode particle size. It can be obtained by a method for manufacturing a spacer for a liquid crystal display element which is small and has a weight ratio of the compounding amount of the small particles to the compounding amount of the large particles of 3: 7 to 7: 3.

In the present specification, the “particle group” means an aggregate of particles having one normal distribution. The particle size distribution characteristics of the liquid crystal display element spacer of the present invention can be theoretically predicted by adding a plurality of normal distribution functions,
The manufactured spacer does not show a normal distribution, the average particle diameter does not coincide with the mode particle diameter, and the spacer has a distorted distribution.
Among the two types of fine particles to be blended, a fine particle mixture that forms a particle size distribution between the particles having the largest particle size and the fine particles having the smallest particle size is suitable as a spacer for a liquid crystal display element. Selection conditions are determined.

In the liquid crystal display element spacer of the present invention, in the particle size distribution, the average particle size and the mode particle size are between the average particle sizes of two or more types of fine particles to be blended. The value particle size does not become larger than the average particle size.

In order to obtain the spacer for a liquid crystal display element of the present invention, the average particle diameter of the small particles is D _S , and the standard deviation is σ.
_S, an average particle diameter D _L of the large particles, when the standard deviation was sigma _L, between the amount W _L of the amount W _S and the large particles above small particles, 3/7 ≦ W _S / W _L ≦ 7/3 (weight ratio) It is preferable to satisfy σ ′ <σ _S <σ _L <σ σ _S / σ _L ≦ 0.7. More _{preferably, 4/6 ≦ W S /} W L ≦ 6/4 σ '<σ S <σ L <σ σ S / σ L ≦ 0.7 0.5σ L ≦ D L -D S ≦ 1.25σ _L.

When σ _S / σ _L is larger than 0.7, the difference between σ and σ ′ is reduced, and the effect of the present invention is reduced. Further, the above σ _S / σ _L ≦ 0.7
However, if the above D _L -D _S is smaller than 0.5σ _L , the small particles are absorbed in the particle size distribution of the large particles, and the difference between the σ and the σ 'becomes small.

When D _L -D _S exceeds 1.25 σ _L , the relationship between σ and σ ′ becomes appropriate, but the side of the spacer obtained by blending on the side larger than the mode particle diameter is larger. The particle size distribution has a two-peak distribution, which is not preferable as a spacer for a liquid crystal display element. The ratio between the W _S and the W _L is preferably centered equivalents, or too little if one is too much, the effect of the present invention is reduced.

In the method of manufacturing a spacer for a liquid crystal display element of the present invention, it is more preferable that at least one of the two types of fine particles is a mixture of fine particles having a similar particle size distribution. A diameter distribution can be obtained. In this case, a group of fine particles having similar particle diameter distribution characteristics such as an average particle diameter and a standard deviation are mixed, and two types of fine particle groups having different particle diameter distribution characteristics such as an average particle diameter and a standard deviation are prepared in advance. . The above-mentioned D _L and D _S and the above-mentioned σ _L and the above-mentioned σ _S are determined based on the characteristic values of the two kinds of fine particle groups.

In the method of manufacturing a spacer for a liquid crystal display element according to the present invention, the particle size distribution of a plurality of fine particles having different particle size distribution characteristics is measured, and the particle size distribution after addition is predicted by adding the respective normal distribution functions. However, it is also possible to estimate the blending amount of each fine particle and simultaneously uniformly mix a plurality of fine particles.

In order to obtain a spacer for a liquid crystal display element having a predetermined mode particle diameter, two kinds of fine particles to be blended are determined based on the mode particle diameter, and the average particle diameter and standard deviation of each group are determined. Is added, and the particle size distribution after addition is predicted, the difference between the predicted mode particle size and the target mode particle size is calculated, the average particle size of the two fine particles to be blended and the standard Finalize the deviation.

The fine particles used in the present invention are not particularly limited as long as the above conditions are satisfied.
Examples thereof include high-molecular polymer fine particles produced by general suspension polymerization, seed polymerization, and other monodisperse fine particle production methods. The particle size distribution of the spacer for a liquid crystal display element of the present invention can be measured by a Coulter counter ZB / C-1000 or the like.

Since the spacer for a liquid crystal display element and the method of manufacturing the same according to the present invention are as described above, the spacer is dispersed and dispersed on a substrate, and the cell gap of the liquid crystal display element is set to the most frequent in the particle size distribution of the spacer. When the particle size is kept below the average particle size, both the large particle side and the small particle side have the same standard deviation σ and σ ′ in the respective particle size distributions. The amount of the display element spacers spread on the substrate can be reduced, and the quality of the liquid crystal display element can be improved.

The present invention 2 is a liquid crystal display device in which the spacer for a liquid crystal display device of the present invention is dispersed in a liquid crystal panel, and the cell gap is equal to or less than the mode particle diameter of the spacer for a liquid crystal display device. . As the liquid crystal display element of the second aspect of the present invention, for example, the one shown in FIG. 1 and the like are cited, and are produced, for example, as follows.

First, an insulating film (for example, SiO ₂ ) is formed on each of the opposing surfaces of the pair of transparent glass substrates 1, and a transparent electrode 2 (for example, I ₂ ) is formed on the insulating film of each of the substrates.
TO) by photolithography. An alignment film 3 (for example, a polyimide film) is formed on the transparent electrode 2 of each of the above substrates. Next, the liquid crystal display element spacers A are sprayed on the alignment film 3 on the substrate.

Thereafter, an adhesive layer is formed on the periphery of the substrate facing the above-mentioned substrate using a sealing material 5 and bonded to the substrate on which spacers are scattered, and liquid crystal 8 is injected between these substrates. Thus, a liquid crystal cell is formed. By providing wiring in the liquid crystal cell, the liquid crystal display element 9 can be formed.
Get.

[0030]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

Example 1 Production of High Polymer Particles As a monomer, tetramethylolmethanetetraacrylate (NH ester A-TMMT, manufactured by Shin-Nakamura Chemical Co., Ltd.)
320 g, 192 g of divinylbenzene, 128 g of ethylvinylbenzene, and 18 g of benzoyl peroxide as a polymerization initiator were mixed and uniformly dissolved. In a separable flask having a volume of 5 L, 2400 ml of a 5% aqueous solution of polyvinyl alcohol was added, and the mixture was further poured.
It was atomized while stirring. After about 8 hours, the stirring was stopped when the average particle diameter of the droplets became 9 μm. Then, while pouring nitrogen gas into the vessel, the mixture was gently stirred in a water bath at 80 ° C. to carry out a polymerization reaction. After 10 hours, the reaction was stopped.

The reaction product was separated from the aqueous polyvinyl alcohol solution by filtration through a glass filter. The reaction product was sufficiently washed on a glass filter with hot water at 80 ° C. to obtain high molecular weight polymer particles. The polymer fine particles were classified and, after the classification, were appropriately remixed so as to have a desired average particle size, to obtain two polymer fine particle groups having a particle size distribution shown in Table 1.

Preparation of Spacer for Liquid Crystal Display Element The composition shown in Table 1 was performed to obtain a spacer for liquid crystal display element.

[0034]

[Table 1]

FIG. 3 shows the particle size distribution curve. FIG.
The solid circles indicate the particle size distribution of the spacer for the liquid crystal display element of Example 1 with a Coulter counter ZB / C-1000.
5 is a particle size distribution curve measured in Example 1. The dashed-dotted line is a normal distribution curve theoretically calculated and drawn using the average particle diameter and the standard deviation obtained from the measured particle diameter distribution of the spacer. The dotted line is a normal distribution curve theoretically obtained by transferring the particle diameter distribution curve on the larger side to the smaller side, with the mode particle diameter in the particle diameter distribution curve of the spacer prepared by the above formulation as the axis. . Similarly, the small standard deviation in Table 1 is obtained by transferring the particle size distribution to the opposite side with the mode particle size as the axis.

As is clear from FIG. 3, the standard deviation in the particle size distribution on the side smaller than the mode particle size is smaller than the standard deviation in the particle size distribution on the side larger than the mode particle size. Note that ΔD is the difference between the average particle diameters of the two types of fine particles used in the compounding. σ> σ _L , σ ′> σ
_{Although the} standard deviation in the particle size distribution after blending with _S was slightly increased on both the small side and the large side, it was in a practically usable range as a spacer for a liquid crystal display element.

Example 2 Using the high-molecular polymer fine particles of Example 1, the particles were classified and, after the classification, were appropriately mixed again so as to have a desired average particle diameter. Three polymer fine particle groups were obtained. These had relatively small standard deviations, but slightly different average particle sizes. These three groups of fine particles were blended to obtain a spacer for a liquid crystal display element.

[0038]

[Table 2]

Table 3 shows the formulation prediction by computer simulation.

[0040]

[Table 3]

In Table 3, large particles (1 + 2) and small particles (3)
Was ΔD = 1.03σ. FIG. 4 shows the particle size distribution of the obtained spacer for a liquid crystal display element.
Compared to FIG. 3 of Example 1, the larger side also shows a sharper particle size distribution, but also in this case, the standard deviation between the larger side and the smaller side is a large difference of σ ′ / σ = 0.53. .

Comparative Example 1 Using the polymer fine particles of Example 1, the mode particle size of the spacer for the liquid crystal display element prepared in Example 1 was taken as the average particle size, and the standard in the particle size distribution on the larger side was used. Two groups of fine particles having a standard deviation as a deviation were prepared according to the formulation shown in Table 4 to obtain a spacer for a liquid crystal display element. This is a method of adjusting the particle diameter of a conventionally used fine particle product, in which two groups of fine particles having substantially the same average particle diameter and particle diameter distribution are blended and uniformly mixed to form a substantially same average particle diameter. A spacer for a liquid crystal display element having a particle diameter and a particle diameter distribution was obtained.

[0043]

[Table 4]

By mixing fine particles having the same average particle diameter and having a normal distribution, fine particles having a normal distribution can be obtained practically and theoretically. In the obtained spacer for a liquid crystal display element, as shown in FIG. 5, the mode particle size and the average particle size are practically the same, and the particle size distribution does not change on both the large and small sides. The particle size distribution was symmetrical with respect to.

Comparative Example 2 Using the polymer fine particles of Example 1, the difference in average particle diameter between the two fine particle groups to be blended compared with that of Example 1 was reduced (ΔD =
0.30 σ), and a spacer for a liquid crystal display element was obtained with the composition shown in Table 5.

[0046]

[Table 5] The particle size distribution of the obtained liquid crystal display element spacer is shown in FIG.
The difference between the particle size distribution on the side smaller than the mode particle size and the particle size distribution on the larger side is recognized, but the difference is small. Although it can be used sufficiently as a spacer, the particle size distribution is close to the normal distribution, and there is no significant difference compared with the conventional spacer.

Reference Examples 1 to 5 Table 6 shows reference examples when the difference ΔD between the average particle diameter of the large particles and the small particles to be blended was changed and when the blending amount was changed.
It was shown to.

[0048]

[Table 6]

Example 3 and Comparative Example 3 Using the various spacers obtained in Examples 1 and 2, Comparative Examples 1 and 2 and Reference Examples 1 to 5, a liquid crystal display element was manufactured, and the display performance of each spacer. The effect was examined.

Assembly of Liquid Crystal Display Element As shown in the sectional view of FIG.
An ITO thin film of a transparent glass substrate 1 having a thickness of 7 mm is formed on a predetermined stripe electrode by photolithography,
An orientation control film was applied thereon, dried and heated, and this substrate was cut into a size of 5 cm × 12.5 cm to obtain a glass substrate for a liquid crystal display device. An epoxy resin-based sealing material 5 (manufactured by Mitsui Toatsu Co., Stract Bond) in which a predetermined glass fiber spacer is mixed around the glass substrate is framed with a line width of 10 mm while leaving a liquid crystal injection hole 6 along the outer periphery of the substrate. And then dried at a predetermined temperature.

The glass substrate was placed horizontally, and the spacer A was scattered from above with a pressurized nitrogen gas, dropped on the substrate surface, and practically uniformly dispersed on the substrate.
The dispersion density of the spacer on the substrate is generally 100 to 2
It is set to be 00 pieces / mm square, but it increases and decreases according to the liquid crystal display element assembling conditions, the strength of the spacer, and the particle size distribution. Was controlled to a predetermined dispersion density.

Normally, if the spacer material, particle size distribution, dispersion density and the like are different, the cell gap changes even if spacers having the same average particle size are used. Even if the assembly conditions are changed, the cell gap changes. The spacers used in this example were manufactured so as to have the same mode particle size, but the cell size was different under certain assembly conditions because the particle size distribution was different. This is clear from experience and also from the literature relating to spacers for liquid crystal display elements (published by Sekisui Fine Chemical Co., Ltd., technical data of Micropearl SF, etc.).

In order to study the effect of the liquid crystal display element spacer of the present invention, the load at the time of sealing after liquid crystal injection described below was increased or decreased to adjust the cell gap to 6 μm. To obtain the necessary sealing load information for each spacer,
The sealing load was predicted in advance by the cell gap simulation method described in the above-mentioned literature. The other counter substrate made by the same method as the above substrate is placed on the substrate with the spacers dispersed above, aligned and superimposed, and pressed uniformly with a heating press machine at a load of 1 kg weight / cm ^2. Then, the epoxy sealing material was cured by heating at a temperature of 160 ° C. for 20 minutes.

The liquid crystal cell thus prepared was subjected to ultrasonic cleaning and drying, and then the inside of the cell was evacuated to a vacuum and liquid crystal was injected through a liquid crystal injection hole provided in a seal portion around the cell. After injecting the liquid crystal, it was left in a clean room environment for half a day with the injection hole opened. Referring to the sealing load at room temperature, which was predicted in advance, press the top and bottom of the panel with a press machine, wipe off the liquid crystal slightly extruded from the injection hole, and apply a light-curing adhesive ( Photorec-A-704, manufactured by Sekisui Fine Chemical Co., Ltd. was spotted, the pressing load was released, a predetermined amount of ultraviolet rays was applied to the injection hole, and the adhesive was cured and sealed to produce a liquid crystal display device. The required pressure at the time of sealing was in good agreement with the value predicted by the simulation.

Evaluation of Liquid Crystal Display Element The following items were observed for the liquid crystal display element manufactured by the above method, and the observation results were combined to make a final evaluation. (1) Cell gap measurement Liquid crystal display element gap measurement device (Oak Seisakusho, T
(FM-120AFT type).

(2) Observation of Display Performance Deflection plates are attached to the upper and lower surfaces of the liquid crystal cell so that the color tone of the reflected light applied to the liquid crystal display panel exhibits an olive color. The color unevenness of the background color was observed. Furthermore, after giving a strong vibration to the liquid crystal display element, the state of color unevenness was observed. Also, 50 V is applied to the electrodes of the liquid crystal display element.
The image quality after static elimination was observed.

(3) Observation with Comparative Control Spacer The mode particle size of each of the working example and the comparative example is defined as an average particle size, and the standard deviation thereof is the standard deviation obtained from the particle size distribution on the large particle side. A conventional spacer exhibiting a normal distribution is manufactured, and the dispersion density is increased or decreased so that the sealing conditions are the same as the dispersion density (100 pieces / mm square) of the spacers of the comparative example and the comparative example. The required number of dispersions was compared, and the dispersion reduction rate of the spacer of the present invention relative to the conventional spacer was determined.

(4) Evaluation Results (Overall Evaluation) The quality of the liquid crystal display device was comprehensively evaluated as follows. Mode: Mode particle size in particle size distribution = Target cell gap. σ: Standard deviation in the larger particle size distribution in the particle size distribution. σ ′ / σ: The ratio between the small side standard deviation and the large side standard deviation was plotted on the axis of the mode particle diameter. Sealing: The sealing press pressure in the cell gap simulation and the actual sealing conditions are described.

Saving rate: when the cell gap is 6 μm (mode particle size), the dispersion density of the spacer of the embodiment or the comparative example is reduced with respect to the conventional spacer dispersion density which is normally distributed with a large standard deviation. Rate. Room temperature: The display quality at room temperature was observed. High temperature: The display quality when the temperature was raised to around 100 ° C. was observed. Shock: Vibration was applied even at room temperature, and changes in display quality (mainly color unevenness and luminance) were observed. Improvement degree: This is a comprehensive evaluation focusing on the stability of display quality when high temperature or vibration is applied, and the degree of improvement for each of the normally distributed spacers that are compared and compared was evaluated.

In the absolute evaluation of the display quality, the absolute value of the larger standard deviation σ (the ratio of σ to the mode particle diameter = CV
The smaller the value, the better. Table 7 shows the evaluation results. In Table 7, ◎ indicates very good, ○ indicates good, Δ indicates slightly good, × indicates poor, and unsuitable indicates that σ with respect to the mode particle diameter is large (7.6%). This indicates that the substrate could not be suppressed to the frequent particle size. If unsuitable, it cannot be used industrially as a spacer.

[0061]

[Table 7]

From these results, the liquid crystal display device using the spacer for a liquid crystal display device according to the present invention can provide a liquid crystal display using a conventional spacer having a normal particle size distribution based on the large side particle size distribution. It has been confirmed that the display quality is more stable than that of the display element even in a severe use environment in which the temperature and the vibration are severe. The production of such fine particles having a distorted particle size distribution is almost impossible by the usual production method of polymer fine particles. The spacer for a liquid crystal display element of the present invention can be manufactured only by blending a plurality of fine particle groups according to a certain standard as described above, and using a spacer manufactured by a conventional manufacturing method, the particle size distribution characteristics of each can be improved. Measure,
By blending them, a spacer for a liquid crystal display element having a specific particle size distribution can be easily manufactured.

[0063]

Since the spacer for a liquid crystal display element of the present invention is as described above, a liquid crystal display element can be obtained with a small amount of dispersion, and the obtained liquid crystal display element is stable under a wide use environment. The displayed image quality can be ensured.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically showing one embodiment of a liquid crystal display device of the present invention.

FIG. 2 is a particle size distribution of a spacer for a liquid crystal display element of the present invention. The vertical axis represents the number of particles, and the horizontal axis represents the particle diameter (μ
m). The solid line represents the particle size distribution of the liquid crystal display element spacer of the present invention, the dashed-dotted line represents the normal distribution created by the average particle size and the standard deviation obtained from the particle size distribution, In addition, the mode particle size in the particle size distribution of the spacer for a liquid crystal display element of the present invention is defined as an average particle size, and a normal distribution based on the particle size distribution on the side larger than the mode particle size is shown.

FIG. 3 is a particle size distribution of a liquid crystal display element spacer in Example 1. The vertical axis represents the number of particles, and the horizontal axis represents the particle diameter (μm). The solid line represents the measured value of the particle size distribution, and the dotted line represents the normal distribution curve assuming fine particles having a particle size of 6 μm based on the standard deviation on the side larger than the mode particle size. Represents a normal distribution curve represented by an average particle size and a standard deviation calculated from an actually measured particle size distribution.

4 is a particle size distribution of a liquid crystal display element spacer in Example 2. FIG. The vertical axis represents the number of particles, and the horizontal axis represents the particle diameter (μm). The solid line represents the measured value of the particle size distribution, and the dotted line represents the normal distribution curve assuming fine particles having a particle size of 6 μm based on the standard deviation on the side larger than the mode particle size. Represents a normal distribution curve represented by an average particle size and a standard deviation calculated from an actually measured particle size distribution.

FIG. 5 is a particle size distribution of a liquid crystal display element spacer in Comparative Example 1. The vertical axis represents the number of particles, and the horizontal axis represents the particle diameter (μm).

6 is a particle size distribution of a liquid crystal display element spacer in Comparative Example 2. FIG. The vertical axis represents the number of particles, and the horizontal axis represents the particle diameter (μm). The solid line represents the particle size distribution curve of the obtained spacer for a liquid crystal display element, and the dot-dash line represents the normal distribution curve obtained from the particle size distribution on the side larger than the mode particle size.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transparent glass substrate 2 Transparent electrode 3 Alignment film 4 Polarizing plate 5 Sealing material 6 Liquid crystal injection port 7 Liquid crystal injection port sealant 8 Liquid crystal 9 Liquid crystal display element A Liquid crystal display element spacer

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-137821 (JP, A) JP-A-6-308505 (JP, A) JP-A-4-180026 (JP, A) JP-A 8- 54633 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) G02F 1/1339

Claims (4)

(57) [Claims] 1. A spacer for a liquid crystal display element having elasticity, wherein the average particle diameter in the particle diameter distribution of the spacer for a liquid crystal display element is 1 to 100 μm, and the mode particle diameter in the particle diameter distribution is A spacer for a liquid crystal display element, wherein a standard deviation in a particle diameter distribution on a smaller side is smaller than a standard deviation in a particle diameter distribution on a side larger than the mode particle diameter. 2. Classified on the basis of the size of the particle diameter.
A method for producing a resilient liquid crystal display element spacer having a particle diameter distribution of a liquid crystal display element spacer so as to have a specific distribution by blending at least two kinds of fine particle groups. Has an average particle size of 1 to 10
0 μm, the standard deviation in the particle size distribution of the fine particle group classified into an average particle diameter smaller than the mode particle diameter is the standard deviation of the fine particle group classified into the average particle diameter larger than the mode particle diameter. And the blending amount of the fine particle group classified into the average particle diameter smaller than the mode particle diameter, and the blending amount of the fine particle group classified into the average particle diameter larger than the mode particle diameter. The ratio is 3: 7 to weight ratio
7: 3. A method of manufacturing a spacer for a liquid crystal display element, wherein the ratio is 7: 3. 3. The method for manufacturing a spacer for a liquid crystal display element according to claim 2, wherein at least one of the two or more types of fine particles is a mixture of fine particles having a similar particle size distribution. 4. A liquid crystal, wherein the spacer for a liquid crystal display element according to claim 1 is dispersed in a liquid crystal panel, and a cell gap is equal to or less than a mode particle diameter of the spacer for the liquid crystal display element. Display element.