Liquid crystal display device with switchable viewing angle, and viewing angle switching method

Abstract

A liquid crystal display device with a switchable viewing angle, and a viewing angle switching method. The liquid crystal display device comprises a display panel (20), wherein the display panel (20)comprises a first substrate (21), a second substrate (22) arranged opposite the first substrate (21), and a liquid crystal layer (23) located between the first substrate (21) and the second substrate(22); a viewing angle control electrode (215) is arranged on the first substrate (21), and a common electrode (225) and a pixel electrode (227) are arranged on the second substrate (22); the display panel (20) may be switched between a wide viewing angle mode and a narrow viewing angle mode. The liquid crystal display device also comprises a display control module (33) and a voltage output module(34), wherein in the wide viewing angle mode, the screen refresh frequency of the display panel (20) is the same as a data input frequency at which screen data is input to the display control module (33), and the voltage output module (34) outputs a direct-current voltage to the viewing angle control electrode (215); and in the narrow viewing angle mode, the screen refresh frequency of the displaypanel (20) is twice or quadruple the data input frequency at which the screen data is input to the display control module (33), and the voltage output module (34) outputs a periodic alternating-current voltage to the viewing angle control electrode (215).

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a liquid crystal display device and a method for switching a viewing angle. Background technique [0002] Liquid crystal display (liquid crystal display, LCD) has the advantages of good image quality, small size, light weight, low driving voltage, low power consumption, no radiation and relatively low manufacturing cost, and occupies a dominant position in the field of flat panel display. [0003] Currently, liquid crystal display devices are gradually developing toward wide viewing angles. For example, liquid crystal display devices using in-plane switching (IPS) or fringe field switching (FFS) modes can achieve wider viewing angles. However, in today's society, people pay more and more attention to protecting their privacy, and there are many things that they don't like to share with others. In public places, I always hope that when I look at my mobile phone or ...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a liquid crystal display device with a switchable viewing angle and a viewing angle switching method, which can realize switching between wide and narrow viewing angles in different occasions, and solve the problems of uneven display, image sticking, and flickering on the display panel.

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