A backlight source, a display device and a control method thereof

Abstract

The embodiment of the invention provides a backlight source, a display device and a control method of the display device, and relates to the technical field of display. The display device can be used for conducting narrow view angle display as well as wide view angle display. The backlight source comprises a wedge-shaped light guide plate which comprises a light-emitting face, a bottom face opposite to the light-emitting face, a rectangular side face, a first light source and a second light source. The first light source is arranged on the outer side of the side face of the wedge-shaped light guide plate and used for emitting collimated light; the second light source is arranged on the outer side of the bottom face of the wedge-shaped light guide plate; and / or, the second light source is arranged on the outer side of the side face of the wedge-shaped light guide plate; and / or, the second light source is arranged on the side, opposite to the side face, of the wedge-shaped light guide plate. The second light source is used for emitting divergent light. The backlight source is used for achieving narrow view angle display as well as wind view angle display.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a backlight source, a display device and a control method thereof. Background technique [0002] In recent years, with the increasing development of science and technology, various display devices have been gradually developed. On this basis, users have higher and higher performance requirements for display devices. Among them, with the increase of mobile office, open working environment and the popularization of high-resolution display, users have more and more demands for narrow viewing angle display. [0003] At present, because the display device has a wide range of light-emitting viewing angles in the space, it becomes easier to spy on the screen information, which affects the security of the information. For example, for some users, they will read some confidential information in public places. Since the light-emitting angle of the display device is large, it will be see...

AI Technical Summary

Problems solved by technology

[0003] At present, because the display device has a wide range of light-emitting viewing angles in space, it becomes easier and easier to spy on the screen information, which affects the security of the information. For example, for some users, they will read some confidential information in public places, And because the display device has a large light-emitting viewing angle, it will be seen by other people around, thereby causing inconvenience to the user, so the development of a display device with an anti-peeping function, that is, a narrow viewing angle display function, has received more and more attention.

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