Patent · US Active

Transparent screen, projection display device, and image display method

US8035894B2 · kind B2 · utility

0Cited by

5References

15Claims

0Family size

Assignee

Mitsubishi Electric Corporation · JP

Inventors

Takao Endo · Tokyo, JP
Yuzo Nakano · Tokyo, JP
Hayato Takeuchi · Tokyo, JP

Key dates

Filing date	Oct 30, 2009
Grant date	Oct 11, 2011
Priority date	—
Expiry date	Oct 30, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG03B21/60
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A Fresnel lens screen 20 is comprised of a light entering surface partial total reflection type Fresnel lens 24, a first light diffusing part 26 disposed behind the Fresnel lens, and a first base 25. An image display element 30 disposed behind the Fresnel lens screen 20 has a lens element 31, a second base 32, and a third base 35. Second light diffusing parts 33 are disposed behind the second base 32. Each of the second light diffusing parts 33 includes two types of particulates having different particle sizes which are distributed therein.

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