| 摘要 |
<p>PROBLEM TO BE SOLVED: To eliminate the adverse influence of other materials on liquid crystals and to shorten the time required for sealing by disposing plastic substrates apart a slight spacing disposed therebetween by spacers and inserting the projecting parts of liquid crystal injection ports or weldable plastic materials between the liquid crystal injection ports and welding the substrates by using ultrasonic waves. SOLUTION: This element is obtd. by disposing two sheets of the plastic substrates, at least one of which are transparent substrates or have the projecting parts 6 in the liquid injection ports, part the slight spacing disposed therebetween by the spacers 5, then holding the projecting parts 6 of the liquid crystal injection ports or the weldable plastic materials between the liquid crystal injection ports and sealing the substrates by ultrasonic waves. The contact of the materials, such as the liquid crystal sealing materials, exclusive of the substrates 2 with the liquid crystals does not arise any more. The sealing width after the ultrasonic welding is preferably >=0.5mm so as to withstand the expansion and shrinkage by the temp. change of the liquid crystal cell and the various stresses exerted from outside. The sealing width is preferably <=10mm in terms of a useless increase in size of the liquid crystal display element.</p> |
