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CN-115981057-B - Liquid crystal display panel and liquid crystal display device

CN115981057BCN 115981057 BCN115981057 BCN 115981057BCN-115981057-B

Abstract

Disclosed are a liquid crystal display panel and a liquid crystal display device. The liquid crystal display panel includes a plurality of pixels. Each pixel includes a pixel electrode, a common electrode, and a liquid crystal that rotates in a plane due to a voltage applied by the pixel electrode and the common electrode. The pixel electrode includes a line electrode. When an initial alignment direction of a liquid crystal whose dielectric anisotropy is positive or a direction perpendicular to the initial alignment direction of a liquid crystal whose dielectric anisotropy is negative is defined as a predetermined first direction, at a boundary between pixels adjacent to each other among the plurality of pixels, a boundary line between the adjacent pixels, an end edge of the linear electrode, and the linear electrode are inclined with respect to the predetermined first direction, and inclination directions of the boundary line, the linear electrode, and the end edge with respect to the predetermined first direction are the same.

Inventors

  • KONNO TAKAYUKI

Assignees

  • 上海天马微电子有限公司

Dates

Publication Date
20260508
Application Date
20230203
Priority Date
20220210

Claims (7)

  1. 1. A liquid crystal display panel, comprising: A plurality of pixels each including a pixel electrode disposed above a main surface of the substrate, a common electrode disposed above the main surface of the substrate, and a liquid crystal rotating in a plane of the main surface of the substrate due to a voltage applied by the pixel electrode and the common electrode, wherein The pixel electrode includes a base electrode and a line electrode branched from the base electrode, The linear electrodes extend across the base electrode to both sides of the base electrode, and one end of each linear electrode is not connected to the base electrode, When the initial alignment direction of the liquid crystal having positive dielectric anisotropy or the direction perpendicular to the initial alignment direction of the liquid crystal having negative dielectric anisotropy is defined as a predetermined first direction, At a boundary between pixels adjacent to each other among the plurality of pixels, a boundary line between the adjacent pixels, an end edge of each of the linear electrodes at an end not connected to the base line electrode is inclined with respect to the predetermined first direction, and inclination directions of the boundary line, the linear electrode, and the end edge with respect to the predetermined first direction are the same, and Within the boundary, an inclination angle of the end edge with respect to the predetermined first direction is larger than an inclination angle of the boundary line with respect to the predetermined first direction.
  2. 2. The liquid crystal display panel of claim 1, wherein the end edge has a curved shape.
  3. 3. The liquid crystal display panel according to claim 1, wherein at a boundary between the adjacent pixels, an extension line of a long side of the line-shaped electrode in one of the pixels and an extension line of a long side of the line-shaped electrode in the other of the pixels are offset in a direction perpendicular to the predetermined first direction.
  4. 4. The liquid crystal display panel of claim 1, further comprising: A scanning wiring extending in a zigzag shape along a predetermined second direction, wherein The shape of the pixel is curved along the scan wiring.
  5. 5. The liquid crystal display panel according to claim 1, wherein a spacing between the linear electrode of one of the pixels and the linear electrode of the other of the pixels is wider than a spacing of the linear electrodes within the pixels when the linear electrode of the one of the pixels and the linear electrode of the other of the pixels are parallel at a boundary between adjacent pixels.
  6. 6. A liquid crystal display device comprising: the liquid crystal display panel according to any one of claims 1 to 5, which displays a monochrome image, and A color liquid crystal display panel which displays a color image.
  7. 7. The liquid crystal display device according to claim 6, wherein each of the plurality of pixels of the liquid crystal display panel emits light to a plurality of pixels in the color liquid crystal display panel.

Description

Liquid crystal display panel and liquid crystal display device Cross Reference to Related Applications The present application claims the benefit of Japanese patent application No. 2022-019878 filed on 10.2.2022 and Japanese patent application No. 2022-172191 filed on 27.10.2022, the disclosures of which are incorporated herein by reference in their entireties. Technical Field The present disclosure relates generally to a liquid crystal display panel and a liquid crystal display device. Background In the related art, a liquid crystal display device is known in which contrast is improved by stacking a plurality of liquid crystal display panels. For example, japanese unexamined patent application publication No. 2018-120045 describes a liquid crystal display device in which a plurality of display panels are stacked and an image is displayed on each display panel, wherein the liquid crystal display device includes a first display panel that displays a color image and a second display panel that displays a black-and-white image. In japanese unexamined patent application publication No. 2018-120045, the pixel electrode of the second display panel has a substantially parallelogram shape, and a plurality of slits extending in the column direction are formed on the pixel electrode of the second display panel. Further, the pixel electrode of the second display panel includes a first side extending in the column direction, a second side extending in the column direction and opposite to the first side, a third side connecting respective first ends of the first side and the second side, and a fourth side connecting respective second ends of the first side and the second side. The third side and the fourth side are each inclined at a predetermined angle with respect to the row direction. In japanese unexamined patent application publication No. 2018-120045, by tilting the third side and the fourth side with respect to the row direction, the observer is prevented from visually recognizing a black matrix, wiring, or the like as a periodic variation in luminance. That is, by tilting the third side and the fourth side with respect to the row direction, occurrence of dark lines at the boundary between pixels adjacent in the column direction is suppressed. When a plurality of liquid crystal display panels are stacked, the transmittance of the stacked display panels is a product of the transmittance of each of the stacked liquid crystal display panels, and thus is lower than that of a single display panel. Therefore, it is necessary to increase the transmittance of each stacked liquid crystal display panel. Among the liquid crystal display panels in which the second display panel of unexamined japanese patent application publication No. 2018-120045 operates in a transverse electric field mode and operates in a transverse electric field mode, there is also a liquid crystal display panel in which the pixel electrode is formed of a linear electrode (branch) (for example, unexamined japanese patent application publication No. 2020-513111 (translation of PCT application)). When the pixel electrode is formed of a linear electrode, even if occurrence of a dark line is suppressed, a disclination line occurring between adjacent pixels may become a dark region, and transmittance of the liquid crystal display panel may decrease. The present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide a liquid crystal display panel and a liquid crystal display device having high transmittance. Disclosure of Invention In order to achieve the above object, according to a first aspect of the present disclosure, a liquid crystal display panel includes: A plurality of pixels each including a pixel electrode, a common electrode, and a liquid crystal rotated in a plane due to a voltage applied by the pixel electrode and the common electrode, wherein The pixel electrode includes a linear electrode, and When the initial alignment direction of the liquid crystal having positive dielectric anisotropy or the direction perpendicular to the initial alignment direction of the liquid crystal having negative dielectric anisotropy is defined as a predetermined first direction, At a boundary between pixels adjacent to each other among the plurality of pixels, a boundary line between the adjacent pixels, an end edge of the linear electrode, and the linear electrode are inclined with respect to the predetermined first direction, and inclination directions of the boundary line, the linear electrode, and the end edge with respect to the predetermined first direction are the same. The liquid crystal display device according to the second aspect of the present disclosure includes: Liquid crystal display panel for displaying monochromatic image, and A color liquid crystal display panel for displaying color images. It is to be understood that both the foregoing general description and the following detailed desc