Liquid crystal display with wide viewing angle and method for making it
The present invention relates generally to the field of electronics and may be used for making displays and, in particular, liquid crystal information displays, panels, cells e.t.c. The object of invention is to simplify the method for making liquid crystal devices by reducing the number of technological operations and consequently to reduce the cost of liquid crystal display without sacrificing the quality (wide viewing angle). To achieve this the electric field applied to the liquid crystal in such display has the non-uniform component parallel to the plane of the substrates, which leads to the non-uniform reorientation of the aforementioned liquid crystal in the space between the aforementioned electrodes within the pixel area and hence improves optical properties of this display in various directions of observation.
1. Liquid crystal display with wide viewing angle comprising nematic liquid crystal with negative dielectric anisotropy placed between flat parallel substrates supplied with conductive electrodes and homeotropic aligning layers, orientation of the said liquid crystal is made non-uniform within the pixel area by means of the parallel to the said substrates components of the electric field applied to the said electrodes, while the components themselves have various directions characterized in that odd and even sections of the at least one of the said electrodes been made sectional are connected to the electric field sources of the opposite polarity,
wherein the liquid crystal display is characterized in that the doubled product of the liquid crystal thickness by its birefringence is made equal to the odd number of the light wavelength of light transmitted through the liquid crystal to form an image.
2. Liquid crystal display with wide viewing angle comprising nematic liquid crystal with negative dielectric anisotropy placed between flat parallel substrates supplied with conductive electrodes and homeotropic aligning layers, orientation of the said liquid crystal is made non-uniform within the pixel area by means of the parallel to the said substrates components of the electric field applied to the said electrodes, while the components themselves have various directions characterized in that odd and even sections of the at least one of the said electrodes been made sectional are connected to the electric field sources of the opposite polarity,
wherein the liquid crystal display is characterized in that the said liquid crystal contains chiral dopant with such concentration that equilibrium pitch of the said liquid crystal equals four times the liquid crystal thickness and the product of the liquid crystal thickness by the liquid crystal birefringence is made equal to the integer number of the light wavelength of light transmitted through the liquid crystal to form an image.
3. Display according to claim 1 , characterized in that one of the said electrodes is made reflective.