Low-optical-distortion spot-free large-curved-surface tempered glass and forming method thereof

By employing matrix gradient heating, dynamic follow-up forming, and multi-dimensional staggered quenching, the optical distortion and wind spot problems of large curved tempered glass have been solved, achieving improvements in stress uniformity and optical consistency. This method is suitable for high-end smart cars, building curtain walls, and large display devices.

CN122127052APending Publication Date: 2026-06-02FOSHAN GAOMING YAQI TEMPERED GLASS CO LTD
0 Cites 0 Cited by

Patent Information

Application Number
CN202610526933.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-21
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing technologies struggle to produce large-curved tempered glass that combines low optical distortion and stress spot-free properties. Traditional processes suffer from optical distortion and wind spot issues during the forming process, making stable mass production impossible.

Method used

By employing matrix gradient heating, dynamic follow-up forming, and multi-dimensional staggered quenching, the temperature field, support force, and cooling method of the glass are controlled to ensure stress uniformity and optical consistency, thereby eliminating optical distortion and stress spots caused by mechanical contact and airflow stagnation effects.

Benefits of technology

It achieves uniform stress distribution on the glass surface, eliminates visible stress marks and transmission optical distortion, and improves the mass production consistency and optical performance of large curved tempered glass.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention relates to the technical field of new materials, in particular to low-optical-distortion spot-free large-curved-surface tempered glass and a forming method thereof.The low-optical-distortion spot-free large-curved-surface tempered glass comprises a glass base body, and the glass base body has a preset bending curvature and a large-size projection area; the physical tempering stress value of the surface of the glass substrate is 90-150 MPa, and the stress range between different areas of the surface of the glass substrate is controlled within 5 MPa; under anisotropic observation conditions, the surface of the glass substrate is free of visible stress stripes, the transmission optical distortion intensity of the glass substrate is not greater than 0.05 diopter, and the reflection waviness is controlled within a preset extremely low threshold. The surface physical tempering stress value is accurately controlled between 90 MPa and 150 MPa, and the stress range between different areas of the surface is creatively controlled within 5 MPa, so that the stress change gradient approaches zero. The extreme stress uniformity fundamentally eliminates the optical birefringence phenomenon caused by local stress sudden change, so that the glass is completely free of macroscopic stress stripes under anisotropic observation conditions.
Need to check novelty before this filing date? Find Prior Art