Circuit arrangement and method for driving segmented LED backlights in particular

摘要

A circuit arrangement for controlling a segmented LED backlight in particular, comprises a generator (50) with a first input (10) to be supplied with a synchronizing signal (SYNC) that comprises image frequency information and/or line frequency information of a display unit, a second input (20) to be supplied with a data signal (DATA) that comprises image information of the display unit, and with an output (30) for providing a modulated signal (MOD).

主权项

1. A circuit arrangement for controlling a segmented LED backlight for a display unit, having a generator with at least one input adapted to be supplied with one or more synchronizing signals comprising line frequency information and image frequency information of the display unit, an additional input to be supplied with a data signal that comprises an image delay information item and an image brightness information item of a respective segment of the segmented LED backlight, and with an output for providing a modulated signal for controlling the segmented LED backlight,
wherein the generator is configured to provide the modulated signal as a function of the data signal such that the image frequency information is delayed by the image delay information item, a leading edge of the modulated signal is synchronized with the line frequency information and a pulse of the delayed image frequency information, and a trailing edge of the modulated signal is synchronized with the line frequency information and a pulse of the image frequency information.