In the work, the pattern formation in a planar-oriented Cholesteric Liquid Crystals (CLC) was studied for various thicknesses to pitch (d/p) ratios under the influence of an electric field directed perpendicular to the plane of the cell. In addition, the features of the director's fields and defects lines were studied. Indeed, we present the splitting of dislocation cores into disclinations with a nonsingular core, the geometry of director patterns associated with dislocation bends. Experimentally, three planar cells with the gap thicknesses d corresponding to three Grandjean zones were prepared with d/p ≈ 1/2, 1, and 3/2. The results show that the dynamic pattern formation of the grating stripes was performed in a different manner. For d/p ≈ 1/2 and d/p ≈ 1, the stripes were showed through the whole cell surface parallel and perpendicular to the rubbing direction, respectively. As well, their contrast was increased with time during formation. In this case, the defect core structure split into a λ^−1/2 λ^+1/2 pair disclinations for a burger vector (b) equal to the pitch (p) dislocation. Besides that, when d/p ≈ 3/2, the grating stripes were performed near the boundaries of the surfaces and then prolonged to the entire cell surface along the rubbing direction. Here, the defect core structure split into a τ^−1/2 τ^+1/2 pair disclinations for a b = p dislocation.

在这项工作中，研究了在垂直于晶胞平面的电场的影响下，平面取向胆甾型液晶（CLC）中各种厚度与间距（d / p）之比的图案形成情况。此外，还研究了导演领域和缺陷线的特征。确实，我们提出了将位错核心分裂成具有非奇异核心的错位，即与位错弯曲相关的指向矢图案的几何形状。实验上，以d / p≈1 / 2、1和3/2制备了三个间隙厚度d分别对应于三个Grandjean区域的平面单元。结果表明，光栅条纹的动态图案形成以不同的方式进行。对于d / p≈1/2和d / p≈1，在整个电池表面分别显示出平行于和垂直于摩擦方向的条纹。同样，它们的对比度在形成期间随时间增加。在这种情况下，缺陷核心结构分裂为λ^-1/2 λ ^+1/2用于汉堡包矢量（b）中对向错等于节距（p）错位。除此之外，当d /p≈3/ 2时，在表面的边界附近进行光栅条纹，然后沿摩擦方向延伸至整个单元表面。在此，缺陷芯结构被分成了τ ^-1/2 τ ^+1/2对向错为AB = P错位。