A new operation mode of a bistable smectic A(SmA) display using two sets of electrodes, one without specific features to induce homeotropic orientation of the director and the other with an in-plane pattern to induce planar orientation of the director, has been demonstrated. Both statements of the director orientation are the stable states of SmA liquid crystals. Compared with the electrical addressing mode of a conventional SmA display, the SmA display mode presented in this study exhibits a high contrast ratio, excellent bistability, and reasonably fast switching under the employment of two crossed polarizers. Moreover, gray level can be achieved by regulating the frequency, owing to the formation of the focal-conic defect. This operation mode of a bistable SmA device demonstrated great potential for the further application in flexible displays.
- Bistable display
- Smectic liquid crystal