Backlight module, display device and driving method thereof

Abstract

The invention discloses a backlight module, a display device and a driving method thereof. The backlight module comprises a substrate, a plurality of light emitting modules arranged at one side of thesubstrate, a light exiting layer arranged at one side, away from the substrate, of each light emitting module, and a plurality of backlight driving modules. An overlapped area exists between the vertical projection of each first light emitting zone on the substrate and the vertical projection of each first light exit area on the substrate; an overlapped area exists between the vertical projectionof each second light emitting zone on the substrate and the vertical projection of each second light exit area on the substrate; an overlapped area exists between the vertical projection of each third light emitting zone on the substrate and the vertical projection of each third light exit area on the substrate. Light emitted from the first light exit area is red light; light emitted from the second light exit area is green light; and light emitted from the third light exit area is blue light. Each of the plurality of backlight driving modules is connected with at least one light emitting module. With the backlight module, the backlight effect of the backlight module is improved; and the power consumption of the backlight module is reduced.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of liquid crystal display panels, and in particular to a backlight module, a display device and a driving method thereof. Background technique [0002] A traditional liquid crystal display device usually includes a liquid crystal display panel and a backlight module; according to the position of the backlight light source (for example, LED lamp beads), the backlight module can be divided into two types: side-type backlight and direct-type backlight. Side-lit backlights obtain light by using backlight sources, light guide plates, and diffusion plates; in direct-lit backlight module backlights, the array of backlight sources is usually arranged directly on the light output surface of the backlight module. The local dimming technology (Local Dimming, LD) is to adjust and control the local light output of the backlight light source, so that the intensity of the backlight light source matche...

AI Technical Summary

Problems solved by technology

[0004] Due to the local dimming technology, the backlight source often uses a combination of traditional blue LED and yellow phosphor powder, which can only adjust the light output of the backlight source. Regardless of the light output of the backlight source, the red, green and blue colors of the backlight spectrum The ratio of is fixed, therefore, the backlight source can only provide white backlight

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