Patent · US Active

Projection screen

US12248157B2 · kind B2 · utility

0Cited by

2References

14Claims

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	Mar 11, 2025
Priority date	—
Expiry date	Feb 1, 2042

Classification

Technology area (CPC G)Physics
CPC primaryG02B2027/0118
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A projection screen, with a design in which the apexes of multiple triangular pyramidal units of the projection screen in an array arrangement change gradually according to a predetermined relation, an image light shone from a projector is reflected by a microstructure layer having the triangular pyramidal units and then converged in a range centered around the human eyes, so as to reduce the degree of difference in brightness at different viewing positions, thus ensuring that the projection screen is provided with excellent uniformity and high gain.

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