Method and device for controlling the backlighting of a flat screen
US8259058B2 · kind B2 · utility
0Cited by
4References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 10, 2008 |
| Grant date | Sep 4, 2012 |
| Priority date | — |
| Expiry date | Jul 5, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Electronic circuit designed to control the level of lighting produced by light diodes in a flat screen. The circuit uses a PDM modulator in order to generate a control signal (Vc) with a number of pulses by period that depends on the desired level of lighting. The advantage is to reduce the energy in the low frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.