Backlight module and liquid crystal display device

Abstract

The invention relates to the field of display technologies, and discloses a backlight module and a liquid crystal display device. The backlight module comprises a light guide plate, an optical membrane material located on the light-emitting side of the light guide plate, and an optical orientation membrane located on the light-emitting side of the optical membrane material. The optical orientation membrane comprises an orientation layer, the orientation layer is provided with a plurality of first light blocking walls arranged in parallel, light-transmitting areas are arranged between any two adjacent first light blocking walls, and the side, facing towards the corresponding light-transmitting area, of each first light blocking wall is the light blocking face. The incidence angle of light emitted from the backlight module through the optical orientation membrane on the light-entering face of a lower polaroid is small, then, the degree of polarization of refracted ray emitted from the light-emitting face of the liquid crystal display device is reduced, and the possibility of seeing image information when observers watch the liquid crystal display device in a naked-eye mode on two sides of the liquid crystal display device in the arrangement direction of the first light blocking walls is reduced. Thus, according to the liquid crystal display device provided with the backlight module, peep prevention display can be well achieved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a backlight module and a liquid crystal display device. Background technique [0002] In the field of display technology, users have higher and higher requirements on the confidentiality of information displayed by liquid crystal display devices. [0003] In the prior art, the confidentiality of the liquid crystal display device can be realized by arranging only the lower polarizer on the liquid crystal panel of the liquid crystal display device, and integrating the upper polarizer on a special glasses. When a liquid crystal display device with only a lower polarizer is displayed, the light from the backlight is polarized by the lower polarizer and then passes through the liquid crystal layer in the liquid crystal panel, and then passes through the liquid crystal panel to emit. When the glasses watch the liquid crystal panel of the liquid crystal display device, only all white ...

AI Technical Summary

Problems solved by technology

[0004] However, in practical applications, researchers have found that the observer can vaguely see the display information from both sides of the liquid crystal panel of the liquid crystal display device under the naked eye state, when the line of sight is inclined at a certain angle to the light-emitting surface of the liquid crystal panel, This has brought great difficulties to the practical application of the anti-peeping display of the liquid crystal display device.

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