| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an image display provided with a flexible polyimide film having high light transmissivity, high heat resistance, high toughness and low absorptivity, and also to provide a flexible transparent organic electroluminescence element. <P>SOLUTION: The image display uses a polyimide film containing at least 10 mol% or more of a repeating unit represented by a formula [1] as an optical film. In the formula [1], R<SP>1</SP>and R<SP>2</SP>each independently represent hydrogen atom, halogen atom or 1-5C alkyl group, R<SP>3</SP>, R<SP>4</SP>and R<SP>5</SP>each independently represent hydrogen atom, halogen atom, 1-10C alkyl, 2-5C alkenyl 1-5C alkoxyl, 3-7C cycloalkyl, nitryl or carboxy, and n represents an integer. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
