| 摘要 |
<p>PURPOSE:To use a film substrate which is weak at a high temperature, and also to obtain a liquid crystal display element having a steep gamma characteristic by using as an oriented film a polyimide-polyamide acid coexistent film which is burned at 140 deg.C+ or -5 deg.C about 30min and whose imidized ring closure reaction advances by 50%. CONSTITUTION:Deflecting plates 3, 4 are stuck to the outside surface of a pair of substrates 1, 2 made of glass or plastic, and transparent conductive films 5, 6 and oriented films 7, 8 are formed on the inside surface. A liquid crystal 11 is packed between the films 7, 8 and seal parts 9, 10. The films 7, 8 are constituted of a polyimide-polyamide acid coexistent film whose imidized ring closure reaction advances by about 50% by being burned at a temperature of a range of 140 deg.C+ or - 5 deg.C about 30min. Accordingly, the film substrate 1, 2 which are weak at a high temperature are used, and as for the coexistent film, its R is 10<3> order and small, and even if the impedance drops due to impurities in the liquid crystal, the contrast does not drop. Also, the coexistent film can obtained a steep gamma characteristic.</p> |
