Patent · US Active

Projection screen

US11892766B2 · kind B2 · utility

1Cited by

1References

12Claims

0Family size

Assignee

APPOTRONICS CORPORATION LIMITED · CN

Inventors

Lin Wang · Nanhu, CN
Xiaofeng Tang · San Jose, US
Wei Sun · Longbeilingcun, CN
Yi Li · Nanhu, CN

Key dates

Filing date	Jun 28, 2020
Grant date	Feb 6, 2024
Priority date	—
Expiry date	Jul 13, 2040

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02D10/00
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Provided is a projection screen, the taper angles of a plurality of triangular pyramid units arranged in an array are designed to gradually change according to a predetermined relationship, so that the image light emitted from the projector is reflected by a microstructure layer with a triangular pyramid unit and then converges to a range centered on the human eye, which reduces the difference in brightness at different viewing positions, so as to ensure that the projection screen has high brightness uniformity and high gain.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.