JPS60212733A - Liquid crystal display element - Google Patents

Abstract

PURPOSE:To execute uniform gap control between electrode substrates, and also to prevent air bubbles from being generated when a titled element is allowed to stand at a low temperature, by providing an interval holding material between the opposed electrode substrates, and making an outside diameter of an interval controlling fine particle smaller than the outside diameter of an interval controlling fine particle in a sealing material. CONSTITUTION:The first glass fiber 3 whose outside diameter is about 7mum is dispersed and placed between an upper electrode substrate 1 and a lower electrode substrate 2, and also the second glass fiber 5 whose outside diameter is larger than the first glass fiber 3 is mixed in a sealing material 4 and an interval holding material 7. In this state, when the upper electrode substrate 1 and the lower electrode substrate 2 are stuck to each other by applying a uniform weight, both the electrode substrates 1, 2 are bent because an area of an effective display surface 6 is wide, the first glass fiber 3 dispersed and placed between both the electrode substrates 1, 2 comes into contact, and a uniform gap P readjusted by the outside diameter of the first glass fiber 3 is formed. On the other hand, an area surrounded by the sealing material 4 and the interval holding material 7 is fixed in a state that it does not contact the first glass fiber 3, because its area is narrow.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a liquid crystal display element, and particularly to a configuration of a sealing portion suitable for preventing the appearance of bubbles that occur at low temperatures.

[Background of the invention]

In recent years, as the external dimensions of liquid crystal display elements have become larger and larger, it has become necessary to increase the precision of the so-called gap, which is the gap between two electrode substrates that hold the liquid crystal. Therefore, conventional methods have been used to disperse fine particles such as gun fiber or alumina powder having a uniform outer diameter in the 7-layer material that holds the liquid crystal material between the electrode substrates and between the electrode substrates in the display area. - is being given.

However, the liquid crystal display element configured in this way is
Pressure is applied until the inner surfaces of the two electrode substrates and the dispersed fine particles come into contact to create a uniform gap and form a φ. Since the thermal expansion coefficients of the inorganic material and the organic material constituting the liquid crystal material are significantly different from each other, when this liquid crystal display element is left in a low-temperature atmosphere, there is a drawback that bubbles are generated on the effective display surface. The appearance of bubbles becomes more likely to occur when left at a low temperature as gaps are formed by the dispersion of the fine particles and uniform pressure applied by the electrodes, and as the precision of the gaps becomes higher.

[Purpose of the invention]

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and its purpose is to control the uniform gap between the electrode substrates and to prevent the generation of bubbles when left at low temperatures. An object of the present invention is to provide a liquid crystal display device.

[Summary of the invention]

In order to achieve such an object, the present invention provides, in addition to the sealing material that holds the liquid crystal material between opposing electrode substrates, a spacing material that forms a pressure relief part on the inside, and that the inner surface of the effective display surface of the electrode substrate is The outer diameter of the dispersed spacing control fine particles is smaller than the outer diameter of the spacing control fine particles in the sealing material.

[Embodiments of the invention]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

Figure 1 is a diagram showing an example of a liquid crystal display element according to the present invention), the figure (&) is a plan view of the main part, and the figure (b) is the summer-1
'It is a sectional view. In the figure, numeral 1 is an upper electrode substrate made of a translucent glass plate and has segment electrodes (not shown) formed on the inner side, and 2 is an upper electrode substrate made of a translucent glass plate and has segment electrodes (not shown) formed on the inner side. - A lower electrode substrate on which a common electrode is formed, and this upper electrode substrate 1. On the inner surface of either one of the lower electrode substrates 2, as shown in the enlarged cross-sectional view of the principal part in FIG. The particles are dispersed and arranged using a spinner method, a spray method, or the like. Reference numeral 4 denotes a sealing material that is printed and coated on the periphery between the opposing upper and lower electrode substrates 1 and 2 to seal the two difference plates 1 and 2 together. For example, a second glass fiber 5 having an outer diameter of about 10 μm is mixed as particulates for controlling the interval of the seal portion. Reference numeral 6 denotes an effective display surface formed by the opposing portion of the segment electrode of the upper electrode substrate 1 and the common electrode of the lower electrode substrate 2, and on which a pattern is displayed by applying a predetermined voltage between both electrodes; 1 is the upper electrode; Between the substrate 1 and the lower electrode substrate 2, there is a 9-spacing material printed and coated on the inner longitudinal direction of the sealing material 4, and within this spacing material T there is a spacer with an outer diameter of about 10 μm as shown in FIG. A second glass fiber 5 is mixed therein, and this spacing material 7 is made of the same material as the first sealing material 4. These sealing materials 4 and spacing materials I
is the upper electrode substrate 1. It is formed on the inner surface of either one of the lower electrode substrates 2 by a screen printing method or the like. 8 is a liquid crystal material sealed in a gear lug formed between the upper electrode substrate 1 and the lower electrode substrate 2, and 9 is a sealing material that seals the injection port for the liquid crystal material 8.

The liquid crystal display element constructed in this way has an upper electrode substrate 1
First glass fibers 3 with an outer diameter of about 7 μm are distributed between the lower electrode substrate 2 and the outer diameter of the first glass fibers 3. Since the large second glass fiber 5 is mixed, when the upper electrode substrate 1 and the lower electrode substrate 2 are bonded together with uniform weight applied, the area of the effective display surface 6 is wide as shown in FIG. Therefore, both electrode substrates 1 and 2 are bent, and the first glass fibers 3 distributed between both electrode substrates 1 and 2 come into contact with each other, and the uniformity regulated by the outer diameter of the first glass fibers 3 is A gap P is formed. on the other hand,
Since the space between the areas surrounded by the sealing material 4 and the spacing material 7 is narrow, both electrode substrates 1 and 2 do not bend sufficiently and are fixed without contacting the first glass fiber 3. become. Therefore, when the liquid crystal display element is left in a low-temperature atmosphere, this region absorbs pressure due to the difference in thermal expansion coefficient between the electrode substrates 1 and 2 and the liquid crystal material 8.
It became a pressure relief part that flexed and relieved the pressure, and this made it possible to reliably suppress the generation of bubbles. In addition, the liquid crystal display element configured in this manner has the outer diameter of the first glass fiber 3 dispersed between the electrode substrates 1 and 2, and the first sealing material mixed in the 4° interval maintaining material TO. It is only necessary to change the outer diameter of the glass fiber 5 in No. 2, and there is no need to add a new process, so there is no problem of increased cost of the liquid crystal display element. In this case, the outer diameter of the first glass fiber 3 is approximately 7 μm and the outer diameter of the second glass fiber 5 is approximately 10 μm. The above-mentioned effect can be obtained by increasing the outer diameter of the glass fiber 3 by 10 to 20%.

In addition, in the above-mentioned embodiment, a case was explained in which the spacing members 7 forming this pressure relief part were arranged linearly, but the present invention is not limited to this, and it is clear from the above description. Of course, the same effect can be obtained even if it is provided in a dotted line shape or partially at any location other than the effective display surface 6.

Also, the distance between the sealing material 4 and the spacing material T that forms this pressure relief part is equal to the distance between the cooling material 4 on both ends of the effective display surface 6.
It is sufficient if the distance is sufficiently smaller than the dimension A in FIG.

Further, in the above-mentioned embodiment, a case was explained in which glass fiber was used as the fine particles, but the present invention is not limited to this, and it is of course possible to obtain the same effect by using alumina powder or the like. is.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to obtain a uniform gap size between the electrode substrates and to prevent the generation of bubbles when left at low temperatures, so that a liquid crystal display element with high quality and reliability can be produced without changing the process. It has an extremely excellent effect that it can be obtained with high productivity without any problems.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) are a plan view of a main part showing an example of a liquid crystal display element according to the present invention, and a sectional view taken along the line I-1', and FIG. 2 is an enlarged sectional view of the main part of FIG.

Claims (1)

[Claims] First spacing control fine particles are dispersed between two electrode substrates each having a translucent electrode formed on at least one of the electrode substrates, and a sealing material containing second spacing control fine particles is disposed in a peripheral area between the electrode substrates. In a liquid crystal display element in which a liquid crystal material is sealed in the gap between the electrode and substrate, the outer diameter of the first spacing control fine particles is smaller than the outer diameter of the second spacing control fine particles. A liquid crystal display element characterized in that a spacing material containing second spacing control fine particles is provided spaced apart inside the first sealing material between the electrode substrates.