Display device having counter-twisting liquid crystal areas and method of operating and manufacturing the same
View Patent ↗A display apparatus, includes: a first substrate; a gate line formed over the first substrate; a data line traversing the gate line, and comprising a source electrode; a drain electrode facing the source electrode to define a channel area; a passivation layer formed over the data line and the drain electrode, and comprising an organic material; a pixel electrode formed over the passivation layer, and comprising a first stem electrode, at least a part of which is overlapped with the gate line or the data line, and a plurality of first branch electrodes contacted to the first stem electrode where one set of the first branch electrodes extend longitudinally in a direction different from the longitudinal extension direction of another set of the first branch electrodes so as to thereby cause opposed twisting of corresponding liquid crystal material.
1. A method of operating a liquid crystal display (LCD) having a liquid crystal layer shared by plural pixel areas and having different twist domain establishing members in each of the pixel areas, the method comprising:
selectively causing liquid crystal material disposed in the liquid crystal layer and belonging to a given one of the pixel areas to simultaneously twist in opposite directions so as to provide improved image contrasting when the image is viewed from one side or another of the display rather than head on,
wherein a portion of the liquid crystal material of the liquid crystal layer and of the given one pixel area is initially aligned according to a predefined initial alignment line when no electric field is generated within the liquid crystal layer portion of the given one pixel area, and
wherein the portion of the liquid crystal material of the given one pixel area is simultaneously twisted in said opposite directions relative to the initial alignment line when a twist inducing electric field is generated within the liquid crystal layer portion.
2. The method of claim 1 wherein said step of selectively causing causes the liquid crystal material in a first half of the given one pixel area to be selectively twisted in a clockwise direction relative to a predetermined frame of reference in response to application of a predetermined twisting voltage to the given one pixel area and causes the liquid crystal material in a second half of the given one pixel area to be selectively twisted counterclockwise in response to said application of the predetermined twisting voltage.
3. The method of claim 2 wherein the plural pixel areas are arranged as horizontal rows and vertical columns and said first and second halves of the each pixel area are disposed in a corresponding one or another of upper and lower halves of the corresponding row of the pixel area, thereby causing said clockwise and counterclockwise twisting to occur respectively in a corresponding one or another of upper and lower halves of the corresponding row.
4. The method of claim 1 wherein the liquid crystal display (LCD) includes an alignment layer adjacent to the liquid crystal layer and said predefined initial alignment line is defined by a rubbing direction of the alignment layer.
5. The method of claim 1 wherein the different twist domain establishing members in each pixel area include branch electrodes extending in different directions.