Light guide structure, direct type backlight module and display panel

US11035998B2 · kind B2 · utility

Assignee

• BOE Technology Group Co., Ltd. · CN

Inventors

• Xiandong Meng · Beijing, CN
• Wei Wang · Beijing, CN
• Xiaochuan Chen · Beijing, CN
• Jifeng Tan · Beijing, CN
• Jian Gao · Singapore, SG
• Xianqin Meng · Beijing, CN
• Pengxia Liang · Beijing, CN

Key dates

• Filing date: May 14, 2018
• Grant date: Jun 15, 2021
• Expiry date: May 12, 2039

Classification

• Technology area (CPC —): General

Abstract

A light guide structure is disclosed. The light guide structure includes a first waveguide layer having a first light incident surface and a first light exiting surface. The light guide structure includes a polarization beam-splitting structure on the first light exiting surface, configured to split light into first polarized light and second polarized light. The light guide structure includes a first polarization coupling grating disposed on the first light incident surface and configured to deflect the first polarized light, and a second waveguide layer having a second light incident surface and a second light exiting surface and disposed on the polarization beam-splitting structure. The light guide structure includes a second polarization coupling grating disposed between the second light incident surface and the polarization beam-splitting structure and configured to deflect the second polarized light.