Screen light computation device or method
US8648794B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 6, 2011 |
| Grant date | Feb 11, 2014 |
| Priority date | — |
| Expiry date | Jun 6, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/145
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a screen light computation device, a first polarizing filter (93) blocks P waves reflected by a reflective surface, and screen light; the reflected light sensor (95) receives S waves; a second polarizing filter (83) allows the screen light to pass while blocking the S waves; and a screen light sensor (85), being set at Brewster's angle, where the P waves is not received, still receives some leakage P waves. A screen light extraction computation (LUT; not shown) stores a correlation between the detection value by the reflected light sensor 95 and the detection value by the screen light sensor 85. The LUT is queried, a value of only the screen light that does not include reflected light is computed, and the screen light that does not include ambient light (reflected light) reflected in a display screen of the monitor is detected without turning off a backlight of a monitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.