公开(公告)号：US20250044640A1

公开(公告)日：2025-02-06

申请号：US18625155

申请日：2024-04-02

Applicant: Shanghai Tianma Micro-electronics Co., Ltd.

Inventor： Xiongping LI ,  Ronghua LI ,  Hui LIU

IPC: G02F1/13357 ,  G02F1/1335

Abstract: A direct-lit backlight module, a method of designing a backlight module and a display device are provided. The direct-light backlight module includes a substrate; an optical film layer; a reflector; and light-emitting elements. The substrate and the optical film layer are arranged oppositely; the light-emitting elements are arranged on a side of the substrate facing the optical film layer; the reflector is located between the substrate and the optical film layer and includes reflective structures surrounding the light-emitting elements; there is a gap between the reflective structures and the optical film layer, and there is air in the gap. In the thickness direction of the backlight module, a distance between one end of the reflective structure adjacent to the optical film layer and the optical film layer is OD1, and the distance between the substrate and the optical film layer is OD; and X = OD ⁢ 1 OD ; and 0.4≤X