LCD element and its making process

Abstract

A liquid crystal display element includes a pair of substrates made of plastic, a liquid crystal sandwiched between the pair of substrates, and a plurality of spacers for maintaining a gap d between the pair of substrates, and when x is an average value of thickness of the plurality of spacers in a state without a load in such a direction that the plurality of spacers are sandwiched between the pair of substrates, d and not more than 300 pieces / mm<2>. Further, in the liquid crystal display element, an elastic modulus of the spacers is set to be larger than that of the pair of substrates. Thereby, the movement of the spacers is suppressed and the rigidity of the substrates is improved. As a result, in the liquid crystal display element, color shading is suppressed while suppressing generation of bubbles in a vacuum region and reduction in contrast, thus obtaining desirable display quality of a display image.

Description

technical field [0001] The present invention relates to a liquid crystal display element in which a spacer is interposed between a pair of substrates made of plastic or the like, and a method for manufacturing the same. Background technique [0002] In the past, there have been cases where a pair of substrates constituting a liquid crystal display element sandwiching a liquid crystal has been made of plastic or the like because of its excellent impact resistance and the like. However, a substrate made of plastic or the like has a problem of low gas barrier properties, that is, the gas easily permeates the substrate. As a result, there arises a problem that gas that has passed through the substrate dissolves into the liquid crystal layer, and air bubbles tend to be generated. [0003] A more specific description is as follows. When constituting a liquid crystal display element, a polarizing plate and the like are attached to a substrate. Since the expansion and contraction...

AI Technical Summary

Problems solved by technology

This situation is regarded as uneven color in STN type liquid crystal cell

In addition, if the spacers 4 are completely distributed at equal intervals, the support of the display side substrate 1a and the back side substrate 1b by the spacers 4 is uniform, and it is difficult to perform a completely equidistant distribution by the general spacer spreading technology.

Then, since the support by the spacer 4 varies from place to place, the pitch of the cells is not uniform, further increasing the above-mentioned color unevenness.

[0017] On the other hand, since if the spacer density is high, the bending of the display side substrate 1a and the back side substrate 1b is suppressed, and the support of the spacer 4 is kept uniform by applying pressure, so it is relatively easy to keep the cell pitch uniform, but Since the amount of liquid crystal occupying the space in the cell is reduced, if it is placed in a low temperature environment, it is easy to form bubbles in the vacuum area

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