Resin composition and image display apparatus

Abstract

A thin image display apparatus capable of high luminance and high contrast display of a display part, which does not produce display defects resulting from deformation of the image display part. The thin image display apparatus has an image display part and a light-transmitting protective part arranged on the image display part. A cured resin layer is arranged between the image display part and the protective part. The cured resin layer has a transmittance in the visible region of 90% or higher and a storage modulus at 25° C. of 1.0×107 Pa or less. The cured resin layer is formed from a resin composition which has a curing shrinkage ratio of 5.0% or less.

Description

TECHNICAL FIELD[0001]The present invention relates to an image display apparatus, such as a liquid crystal display apparatus (LCD), used in a cellular phone, for example. In particular, the present invention relates to an image display apparatus provided with a transparent protective part on an image display part, in which a cured resin is arranged between the image display part and the protective part.BACKGROUND ART[0002]Conventionally, as this type of display apparatus, a liquid crystal display apparatus 101 illustrated in FIG. 10, for example, is known. This liquid crystal display apparatus 101 is provided with a transparent protective part 103 made of, for example, glass or plastic on a liquid crystal display panel 102.[0003]To protect the surface of the liquid crystal display panel 102 and a polarizing plate (not illustrated), a spacer 104 is arranged between the liquid crystal display panel 102 and the protective part 103 to form a gap 105 between the liquid crystal display pa...

AI Technical Summary

Benefits of technology

[0016]According to the resin composition of the present invention, the stress generated by resin curing shrinkage when the resin composition is applied between the image display part and the protective part and cured, can be suppressed to a minimum. This allows the effects of such stress on the image display part and the protective part also to be suppressed to a minimum. Therefore, according to the image display apparatus of the present invention, hardly any distortion is produced in the image display part and the protective part.

[0017]Furthermore, the cured resin of the resin composition according to the present invention has a refractive index closer to that of a structural panel of the image display part or that of the structural panel of the protective part than the refractive index of the gap which is provided between the liquid crystal display panel and the protective part. Thus, the reflection of light at the interface between the protective part and the resin composition or the interface between the resin composition and the image display part can be suppressed.

[0018]Consequently, according to the image display apparatus of the present invention, a high-luminance and high-contrast display which is free from image defects can be provided.

[0019]Especially, when the image display part is a liquid crystal display panel, a high-quality display can be achieved by reliably preventing image defects such as disrupted orientation of the liquid crystal material.

[0020]In addition, according to the image display apparatus of the present invention, since a cured resin is arranged between the image display part and the protective part, the image display apparatus is stronger against shocks.

[0021]Still further, according to the present invention, an image display apparatus which is thinner than the conventional example, in which a gap is provided between the image display part and the protective part, can be provided.

Problems solved by technology

However, the gap 105 between the liquid crystal display panel 102 and the protective part 103 scatters light, resulting in decreased contrast and luminance.

The presence of the gap 105 also makes it difficult to produce thinner display apparatuses.

However, the stress generated during the curing shrinkage of the cured resin causes an optical glass plate sandwiching the liquid crystals in the display panel to deform, resulting in image defects such as disrupted orientation of the liquid crystal material.

However, in such a configuration, if a photocurable resin composition is filled in the gap 105 between the liquid crystal display panel 102 and the protective part 103 and then photocured, the photocurable resin composition in the region where a shielding part is formed may remain uncured due to insufficient light reaching the photocurable resin composition.