Backlight device and display device
US8599119B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 12, 2010 |
| Grant date | Dec 3, 2013 |
| Priority date | — |
| Expiry date | Dec 22, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/021
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A resistive element is connected in series to a cathode terminal of an LED light source at a last stage (or an anode terminal of an LED light source at a first stage) of an LED chain, and a resistance value of the resistive element is configured to be variable in resistance value in accordance with a variation of voltage drops of the LEDs connected in series so that a resistance value of a resistive element connected to an LED chain having a large voltage drop has a smaller resistance value then a resistance value of a resistive element connected to an LED chain having a small voltage drop. With this configuration, the power, which has been wasted otherwise as heat in the backlight driver IC, may be dispersed to the resistive elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.