Director profiles and electrooptical properties in polymer-stabilized π cells used in optically compensated bend (OCB) liquid crystal displays (LCDs) are theoretically investigated by introducing an additional term which expresses the effect of polymer stabilization on the free energy density. The conditions required to stabilize the bend alignment definitively have been theoretically clarified and experimentally confirmed. As a result, the bend alignment is successfully stabilized even if the twist state is more stable than the bend state before the application of polymer-stabilization treatment.

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It is shown that the transient response characteristics of the polymer stabilized bend (PSB) cell are deteriorated by the polymer stabilization treatment. The increase in rotational viscosity 1 due to polymer stabilization is experimentally confirmed by the transient displacement current method proposed previously by Imai et al. [Jpn. J. Appl. Phys. 33 (1994) L119] It is shown that the deterioration of the transient characteristics of the PSB cell is caused by the increase in rotational viscosity and the decrease in flow velocity due to the changes in Leslie viscosities resulting from the polymer stabilization treatment.

Director profiles and electrooptical properties in polymer-stabilized p cells used in optically compensated bend (OCB) liquid crystal displays (LCDs) are theoretically investigated by introducing an additional term which expresses the effect of polymer stabilization on the free energy density. The conditions required to stabilize the bend alignment definitively have been theoretically clarified and experimentally confirmed. As a result, the bend alignment is successfully stabilized even if the twist state is more stable than the bend state before the application of polymerstabilization treatment.