High contrast projection television shield
US6717626B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2000 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | May 8, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/485
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A protection panel is provided that enhances the color quality and/or contrast of a rear projection television set. The protection panel has a spectral transmittance that peaks at dominant wavelengths of red, green, and blue light, and that is reduced at wavelengths between red and green light and between green and blue light. The spectral transmittance at the dominant wavelengths is between sixty and eighty percent. Preferably, the spectral transmittance at the wavelengths between red and green light and between green and blue light are at least five percent less than at the dominant wavelengths. In addition, the spectral transmittance at a dominant wavelength of red light is about five percent less than at a dominant wavelength of blue light to reduce blue color saturation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.