Reflective screen
US10444614B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 2017 |
| Grant date | Oct 15, 2019 |
| Priority date | — |
| Expiry date | Jul 28, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/58
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A screen with a high flatness where no distortion arises in a central portion of the screen can be obtained. A first thickness of a portion other than a plurality of inclined portions that reflects to the front a obliquely-incident projection light is no more than 2 times a second thickness of the inclined portion. Moreover, a width is about 1550 mm, a height is about 900 mm, and when the reflective screen is suspended so a vertically-downward pulling load is about 3 kg, in a first region that includes the central portion of the reflective screen but does not include an end portion of the reflective screen, no shift arises in an image displayed on the reflective screen between when a reference line passing through a substantially central portion of the reflective screen at an incidence angle of about 15 degrees and when the reference line is projected at an incidence angle of about 60 degrees.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.