Optical system and VR display device

US12405445B2 · kind B2 · utility

Assignee

• BOE Technology Group Co., Ltd. · CN

Inventors

• Jiarong BAI · Beijing, CN
• Ruijun Dong · Beijing, CN
• Yulong WU · Beijing, CN
• Chenru Wang · Beijing, CN
• Ke Li · Beijing, CN
• Na HAN · Seoul, KR
• Zhanshan Ma · Beijing, CN
• Lili Chen · Beijing, CN

Key dates

• Filing date: Nov 25, 2021
• Grant date: Sep 2, 2025
• Expiry date: Nov 25, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B27/01
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical system has an optical axis, and includes a positive focal power lens, a negative focal power lens and a display. The positive focal power lens includes a first convex surface away from the display and a second convex surface proximate to the display. The negative focal power lens includes a third convex surface away from the display and a fourth concave surface proximate to the display. For a refractive index of the positive focal power lens and a refractive index of the negative focal power lens, one is greater than another, and a greater refractive index is a first refractive index, a smaller refractive index is a second refractive index, the first refractive index is greater than 1.7, the second refractive index is greater than 1.5, and a ratio of the first refractive index to the second refractive index is less than or equal to 2.