Liquid crystal display and backlight system with detection circuit for detecting connection state of power input
US8144110B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | May 27, 2008 |
| Grant date | Mar 27, 2012 |
| Priority date | — |
| Expiry date | Nov 16, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/027
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An exemplary backlight system includes a power input circuit (21), a detection circuit (27), a control circuit (28), a light emitting diode driving circuit (25), and a light emitting diode array (26). The detection circuit is configured to detect a connection state of the power input circuit with respect to an external power source, and send a corresponding connection states signal to the control circuit. The control circuit is configured to output a control signal to the light emitting diode driving circuit according to the connection state signal. The light emitting diode driving circuit is configured to drive or shut down the light emitting diode array according to the control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.