pÕ2 and 5pÕ2 twisted bistable nematic liquid crystal display
نویسندگان
چکیده
A p/2 and 5p/2 twist bistable nematic liquid crystal cell is optimized in optics by a parameter space approach. The cell possesses good contrast ratio, a preferable dDn value, a wide viewing angle, and black–white display. Three switching wave forms can be used to switch the cell between p/2 and 5p/2 twist states. Controlling the selection voltage amplitude can provide gray scales for the cell. © 2000 American Institute of Physics. @S0021-8979~00!06005-9#
منابع مشابه
Three-terminal bistable twisted nematic liquid crystal displays
A three-terminal bistable twisted nematic liquid crystal display has been demonstrated. This display makes use of a combination of strong in-plane electric fields and vertical electric field for switching between the f and the f1p twist states. The lifetimes of the two bistable twist states are infinite, which is a significant improvement over conventional bistable twisted nematic displays. © 2...
متن کاملOptimization of reflective bistable twisted nematic displays with retardation compensation
The contrast ratios of reflective bistable twisted nematic liquid crystal displays with a rear quarter-wave film are optimized by means of a parameter space approach. By plotting the contrast ratio as a function of the twist angle and thickness-birefringence product (dDn) of the display, the regions where the displays show the best contrast ratio are clearly shown. Both the absolute reflectance...
متن کاملOptimization of reflective bistable twisted nematic liquid crystal displays
The contrast ratio of reflective bistable twisted nematic displays are optimized by means of a parameter space approach. By plotting the contrast ratio as a function of the twist angle and thickness-birefringence product of the display, the regions where the display shows the best contrast ratio are clearly shown. Both the absolute reflectance and wavelength dispersion of two bistable twisted s...
متن کاملP-130: Large-Cell-Gap Bistable TN-LCD Based on Dual-Frequency Operation
A bistable twisted nematic liquid crystal display based on dual frequency driving electronics has been demonstrated. By using special combinations of alignment layers and liquid crystals, bistability can be achieved readily with cell gaps as large as 5μm.
متن کاملOptical Properties of Bistable Twisted Nematic LCD and Its Switching Mechanisms
The brightness and contrast ratio of bistable twisted nematic displays are studied using the parameter space approach. By plotting the contrast ratio as a function of the twist angle and birefringence of the display, regions where the bistable twisted nematic display shows the best contrast ratio are clearly shown. We also studied the switching mechanisms of such displays.
متن کامل