Liquid crystal display panel with switchable wide and narrow viewing angles and liquid crystal display device

Abstract

The invention relates to a liquid crystal display panel with switchable wide and narrow viewing angles and a liquid crystal display device. The liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal layer, wherein a light collecting diaphragm is arranged on the side, away from the liquid crystal layer, of the first substrate; a prism layer is arranged onthe side, facing the liquid crystal layer, of the first substrate; the light collecting diaphragm is used for narrowing light incident from the side, away from the liquid crystal layer, of the first substrate; the prism layer is used for scattering the narrowed light; a first common electrode and a pixel electrode are arranged above the prism layer; a second common electrode is arranged on the side, facing the liquid crystal layer, of the second substrate; a common voltage is applied to the first common electrode; and a viewing angle control voltage used for switching the wide and narrow viewing angles is applied to the second common electrode. According to the liquid crystal display panel, the light collecting diaphragm is used for avoiding whitening of two sides during front viewing, sothat the visual performance at the narrow viewing angle is improved; wide-viewing-angle display is achieved by combining with the prism layer; the first common electrode and the second common electrode are used to form a bias voltage electric field for achieving narrow-viewing-angle display; and therefore, wide and narrow viewing angle switching can be achieved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a liquid crystal display panel and a liquid crystal display device with switchable wide and narrow viewing angles. Background technique [0002] With the advancement of social economy and science and technology, users of display devices have different visual requirements for shared information and confidential information, and a display device with a single viewing angle mode can no longer meet the needs of users. Therefore, there is a demand for liquid crystal display panels to switch between wide and narrow viewing angle modes. When the user needs to share information, the wide viewing angle mode is turned on; when the user wants to protect the displayed information, the narrow viewing angle mode is used. [0003] In the prior art, there are the following three methods for switching between wide and narrow viewing angle modes: [0004] 1. Blind technology, the narrow viewing ...

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Problems solved by technology

[0006] 3. If figure 1 In the display panel shown, in the narrow viewing angle mode, the display is controlled by the pixel electrode 11 and the common electrode 12, and by applying a full-surface bias voltage between the common electrode 12 and the viewing angle control electrode 13, the liquid crystal molecules 14 are lifted to form a large viewing angle. Light leaks to achieve the anti-peep effect, that is, the white state structure is adopted; however, the brightness of the dark state in the narrow viewing angle mode is relatively high, resulting in whitening on both sides of the panel when viewed from the front and grayscale inversion at a certain viewing angle, which affects the display effect and anti-peeping effect

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