Liquid crystal display panel and liquid crystal display device with backlight chromaticity balance
US9024923B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 14, 2012 |
| Grant date | May 5, 2015 |
| Priority date | — |
| Expiry date | May 17, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2224/48091
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The liquid crystal display panel includes a liquid crystal display unit, and a backlight unit illuminating the liquid crystal display unit. The backlight unit includes first and second white light-emitting diodes that respectively emit white light, and first and second drive units that respectively supply a current to the first and second white light-emitting diodes. The first and second drive units are respectively configured to be able to adjust supply current to the first and second white light-emitting diodes. Chromaticities of the first and second white light-emitting diodes are of a relationship of being positioned opposite each other across a blackbody locus on an xy chromaticity diagram. The first and second white light-emitting diodes change over time so that, on the xy chromaticity diagram, an intersection point of the blackbody locus and a line that passes through the chromaticities of the first and second white light-emitting diodes becomes constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.