| Summary: | 碩士 === 國立成功大學 === 光電科學與工程研究所 === 94 === To control the liquid crystals (LCs) orientation, the alignment is very important technology in the fabrication processes of liquid crystal display (LCD). Generally, the mechanically rubbed polyimide (PI) is the most use in LC cells as the material to align LC. But, there are many drawbacks of traditional rubbing for aligning LCs, including contamination of the sample, generation of static charge and scratches which would affect the electro-optical performance of the LCD. A lot of non-contact alignment techniques, such as ion-beam alignment, plasma treated alignment, and photoalignment, had been reported that they have great potential for LCs alignment. In this research, we have successfully fabricated light, thin, and impacting LCDs in flexible substrates, in which the non-contact plasma alignment technology was used. The flexible LCDs are very suitable to be used in portable electronic products, and think about the convenience and cheaper producing cost of the roll-to-roll fabrication. They must be key roles in the display of next generation. Reading a lot of important journals and conference papers, such as SID and IDW. We find many lead companies have invested the develop of flexible liquid crystal display. Therefore, the performance was compared between rubbing-aligned and plasma-aligned LCDs fabricated in plastic substrates in stead of traditional glass substrates.
When the plasma with proper energy and incident direction bombarded the polyimide alignment layer, the optoelectronic characteristics of plasma aligned LCDs are almost the same as that of traditionally rubbed LCDs. In bending states, the LCDs aligned by non-contact plasma have ever better performance than that aligned by traditional rubbing.
|
|---|
