▎ 摘　　要

NOVELTY - The module has a graphene functional layer (3) located at a light emitting side of a blue light source, where transmittance of the graphene functional layer is changed under action of an electric field. A quantum dot layer (4) is located at the light emitting side of the blue light source. The quantum dot layer is provided with red quantum dot (41) and green quantum dot (42). The graphene functional layer is provided with a graphene film (31). An electrochromic liquid crystal (32) is formed on the graphene film. The electrochromic liquid crystal is deflected under action of electric signal transmitted on the graphene film for changing transmittance of the graphene functional layer. USE - Backlight module for use in LCD display device (claimed). ADVANTAGE - The backlight module provides high color gamut white light with controllable transmittance, arranges the quantum dot layer with the red quantum dot and the green quantum dot, effectively converts high energy blue light emitted by the blue light source into red light and green light, and emits light of the full spectrum by mixing proportion, thus improving color of the display screen. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a backlight module manufacturing method. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a backlight module. Blue light (1) First substrate (2) Graphene functional layer (3) Quantum dot layer (4) Second substrate (5) Red light (6) White light (7) Green light (8) Graphene film (31) Electrochromic liquid crystal (32) Red quantum dot (41) Green quantum dot (42)