Backlight module and display device

Abstract

The invention discloses a backlight module and a display device. The backlight module comprises a light guide plate, and a light deflection element arranged at the side of a light-emergent face of the light guide plate, wherein the light deflection element comprises a prism module; the light deflection element is provided with a plurality of light deflection units having the same structures; all the light deflection units have an asymmetric structure which inclines relative to a normal line perpendicular to the light-emergent face of the light guide plate, so that the viewing angle of light emitted by the backlight module is deflected relative to the normal line. The prism module comprises at least one layer of prismatic lens; a plurality of strip-shaped raised edges which are arranged in parallel are positioned on the surface of the side, deviating from the light guide plate, of the prismatic lens. The light deflection units having the asymmetric structures are arranged to enable the light emitted by the backlight module to be deflected relative to the normal line on the original basis, so that light emergence is also deflected, an asymmetrical viewing angle is formed, and the special requirements of a display screen are met.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a backlight module and a display device. Background technique [0002] Thin Film Transistor Liquid Crystal Display (TFT-LCD) has the characteristics of small size, low power consumption, relatively low manufacturing cost and no radiation in the current display device. occupied a dominant position. [0003] A liquid crystal display device is generally composed of a backlight module and a display panel. The display panel itself does not emit light, and the backlight module provides light to the display panel. The backlight module is an important component in the liquid crystal display device, and its light output quality determines important parameters such as the brightness of the liquid crystal display, the uniformity of emitted light, and the viewing angle, and largely determines the luminous effect of the liquid crystal display. [0004] At present, the viewing angles of liq...

AI Technical Summary

Problems solved by technology

However, in practical applications, it is often necessary to reverse the viewing angle of the LCD screen. For example, when the driver watches the vehicle-mounted LCD screen, the viewing angle of the LCD screen is symmetrical and the brightness of the viewing angle near the center line of the LCD screen is displayed. The effect is better, but the driver usually does not watch the LCD screen from the optimal viewing angle, but looks down on the LCD screen, that is, the screen is viewed from the large viewing angle of the LCD screen, so the current display screen is difficult to meet Similar to the above requirements for asymmetric special perspectives

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