Patent · US Active

Laser projection apparatus

US11630378B2 · kind B2 · utility

1Cited by

0References

20Claims

0Family size

Assignee

Hisense Laser Display Co., Ltd · CN

Inventors

Mingchen Ma · Shandong, CN
Liang Yin · San Jose, US

Key dates

Filing date	Jul 29, 2020
Grant date	Apr 18, 2023
Priority date	—
Expiry date	Feb 14, 2041

Classification

Technology area (CPC G)Physics
CPC primaryG03B21/208
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A laser projection apparatus includes a laser source, an optical engine and a projection lens. The optical engine includes a light pipe, a lens assembly, a reflector, a prism assembly and a digital micromirror device. An optical axis of the illumination beam transmitted by the light pipe and the lens assembly is a first optical axis. An optical axis of an illumination beam reflected by the reflector to the prism assembly is a second optical axis. The first optical axis is perpendicular to the second optical axis, and both the first optical axis and the second optical axis are parallel to the beam receiving face of the digital micromirror device.

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