Rapid detection method for decay of liquid crystal display device having LED backlight and display device provided with rapid compensating device for decay
US8643589B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 2010 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Aug 6, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/145
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a rapid detection method for the decay of a liquid crystal display device having an LED backlight and a display device provided with a rapid compensating device for decay. The invention employs a mutually orthogonal series of driving signals to drive a plurality of LED devices in a synchronized manner with the driving signals having a one-to-one correspondence with the LED devices. A processing device extracts respective light emission data for the respective LED devices, compares the respective light emission data with the corresponding reference values pre-stored in the memory device and commands another device to compensate for any deviation existing therebetween. Accordingly, the LED devices are tested in batch mode and the testing is remarkably speeded up without interfering with users' activities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.