Method of obtaining luminance and chromaticity of white in RGBW display device using RGB display device
US9542876B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2014 |
| Grant date | Jan 10, 2017 |
| Priority date | — |
| Expiry date | Mar 31, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of obtaining luminance and chromaticity of white in the RGBW display using RGB display, including; obtaining spectral values of a q grayscale of red sub-pixels, green sub-pixels and blue sub-pixels of the RGB display; obtaining spectral values of red, green and blue sub-pixels of a color filter in the RGB display; calculating a spectral value of the q greyscale of white in the RGB display as a spectral value of the q grayscale of the white sub-pixels of the RGBW display; calculating tristimulus values WXq, WYq and WZq of the q greyscale of the white sub-pixels of the RGBW display; using the stimulus value WYq as a luminance of the q greyscale of the white sub-pixels of the RGBW display, and using the formulaeto calculate a chromaticity (x, y) of the white sub-pixel of the RGBW display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.