We have successfully demonstrated a top‐com based PLS (plane to line switching) LCD mode by adopting a low‐temperature passivation layer above the organic layer. The top‐com based PLS mode increased the panel transmission by 60% compared to the conventional bottom‐com PLS structure. A digital switching‐type touch screen function has been embedded inside the panel, showing excellent sensitivity of 20gf. These results were achieved by a new additional column spacer layer and a passivation trench structure. This technology can be applied to wide angle of view hand‐held phones, personal digital assistants (PDAs), and tablet PCs.
Polyimide (PI) alignment layer is essential constituent of LCD. In this research, we made LCD without PI alignment layer by using LC containing self‐align (SA) compound. When we use SA instead of PI, alignment stability and Mura were problems should be solved. We overcome those things by introduction of polymerizable unit and using mixture of SAs compound.
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