Pixel electrode structure and liquid crystal display panel

#This application is a National Phase of PCT Patent Application No. PCT/CN2020/083217 having International filing date of Apr. 3, 2020, which claims the benefit of priority of Chinese Patent Application No. 202010173477.5 filed on Mar. 13, 2020. The contents of the above applications are all incorporated by reference as if fully set forth herein in their entirety.

#The present application relates to the field of display technologies, and in particular, to a pixel electrode structure and a liquid crystal display panel.

#There are multiple display modes in liquid crystal display (LCD) panels, such as vertical alignment (VA) liquid crystal display, twisted nematic (TN) liquid crystal display, etc. The VA display is a vertical alignment display mode which is normally black, and adopts the VA display mode of negative liquid crystals. After liquid crystals are formed into a cell, the liquid crystals are irregularly tilted. In order to improve response times of the liquid crystals in conventional VA mode, a voltage needs to be applied between an upper electrode 1 and a lower electrode 2 first so that the liquid crystals 3 exhibit a certain pretilt angle, as shown in FIG. 1. A conventional pixel electrode design is shown in FIG. 2, and an electrode region A is a voltage input terminal. Assuming that an electric field strength of the electrode region A is 1, an electric field strength of a display region B close to the electrode region A would be 0.8 as it is too close to the electrode region A. A larger electric field strength here will cause the liquid crystals close to the display region B to be affected by an electric field and align, resulting in a pretilt angle. An electric field strength of a display region C is 0.6, and the liquid crystals in the display region C will be affected by the electric field strength here, and another type of pretilt angle will be generated to form a liquid crystal distribution shape as shown in FIG. 3. Therefore, two different liquid crystal orientations will be formed, two types of “sides” of the liquid crystals can be seen from a front, orientations of the liquid crystal are disorderly, and macroscopic appearance is dark streaks. The dark streaks will affect contrast and transmittance of the liquid crystal display panels, lowering quality of the display panels.

#In order to illustrate the technical solutions of the present disclosure or the related art in a clearer manner, the drawings desired for the present disclosure or the related art will be described hereinafter briefly. Obviously, the following drawings merely relate to some embodiments of the present invention, and based on these drawings, a person skilled in the art may obtain the other drawings without any creative effort.

#FIG. 1 is a schematic side view structural diagram of a pretilt angle formed after liquid crystal alignment in conventional art.

#FIG. 2 is a schematic bottom view of a pixel electrode structure in conventional art.

#The following description of each embodiment, with reference to the accompanying drawings, is used to exemplify specific embodiments which may be carried out in the present invention. Directional terms mentioned in the present invention, such as “top”, “bottom”, “front”, “back”, “left”, “right”, “inside”, “outside”, “side”, etc., are only used with reference to the orientation of the accompanying drawings. Therefore, the used directional terms are intended to illustrate, but not to limit, the present application. In the drawings, components having similar structures are denoted by the same numerals.

#In an embodiment, as shown in FIG. 4, a pixel electrode structure 100 is provided, which includes at least one trunk electrode 30, a control electrode 40, and a connection electrode 50. The trunk electrode 30 divides the pixel electrode structure into a first pixel electrode region 10 and a second pixel electrode region 20. The control electrode 40 is disposed at a position close to the first pixel electrode region 10 and away from the second pixel electrode region 20, and a gap is defined between the control electrode 40 and the first pixel electrode region 10. The connection electrode 50 is disposed between the control electrode 40 and the second pixel electrode region 20. An end of the connection electrode 50 is connected to the control electrode 40 and the other end is connected to the pixel electrode structure in the second pixel electrode region 20 (as second branch electrodes 21 in FIG. 4). The first pixel electrode region 10 and the second pixel electrode region 20 of the pixel electrode structure are symmetrical with respect to the trunk electrode 30.

#Specifically, the first pixel electrode region 10 includes at least one first branch electrode 11, and the second pixel electrode region 20 includes at least one second branch electrode 21, wherein the first branch electrode 11 and the second branch electrode 21 are symmetrical with respect to the trunk electrode 30.