Apparatus and method for displaying drive state of backlight in liquid crystal display device
US8552966B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2008 |
| Grant date | Oct 8, 2013 |
| Priority date | — |
| Expiry date | Oct 7, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is checking a drive state of a backlight lamp of a liquid crystal display device and notifying to an external entity whether it is normally driven in which level or is difficult to be normally driven. The apparatus for displaying a drive state of a backlight in a liquid crystal display device includes an inverter for converting an inputted DC voltage into an AC voltage of a certain level, and outputting the same to a backlight lamp; a drive voltage detecting unit for detecting a drive voltage supplied to the backlight lamp from the inverter and outputting a detected signal according to the detected drive voltage; a drive current detecting unit for detecting a tube current of the backlight lamp and outputting a detected signal according to the detected tube current; a drive voltage control/drive state signal output unit for checking a drive state of the backlight lamp based on the two detected signals, and controlling the drive voltage outputted from the inverter based on the checked result as well as outputting a drive state signal for indicating the drive state; and a lamp drive state indicating unit for indicating in which drive state the backlight lamp is driven accord…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.