Device and method for controlling backlight light sources

A display driver integrated circuit, comprising:

• a drive circuit configured to drive a region of a display panel having a plurality of regions;
• a local dimming processing circuit configured to generate backlighting data for the region of the display panel, wherein the backlighting data is indicative of luminance levels of respective light sources corresponding to the region of the display panel;
• and
• a backlighting data transfer circuit configured to:
• store ordering information indicative of an order for outputting the backlighting data, wherein the ordering information comprises sequence numbers associated with respective light sources, wherein a respective sequence number for a respective light source specifies the order in which the backlighting data associated with the respective light source is to be transferred to a light source driver,
• receive a backlighting data synchronization signal from an entity external to the display driver integrated circuit, and
• output the backlighting data based on the ordering information and the backlighting data synchronization signal to control the luminance levels of the respective light sources;
• wherein the backlighting data transfer circuit further comprises:
• an ordering information memory configured to store the sequence numbers for the respective light sources;
• and
• an address memory configured to store addresses of the sequence numbers in the ordering information memory, and
• wherein the backlighting data transfer circuit is configured to use the stored addresses stored in the address memory to retrieve the sequence numbers from the ordering information memory.

A method, comprising:

• illuminating a display panel with a plurality of light sources, the display panel comprising a plurality of regions;
• generating, by each display driver integrated circuit (DDIC) of a plurality of DDICs, backlighting data for a respective region of the plurality of regions, wherein the backlighting data for the respective region is indicative of luminance levels of respective light sources, of the plurality of light sources, which correspond to the respective region;
• storing, by each of the plurality of DDICs, ordering information indicative of an order for outputting the backlighting data generated by the respective DDIC, wherein the ordering information comprises sequence numbers associated with respective light sources, wherein a respective sequence number for a respective light source specifies the order in which the backlighting data associated with the respective light source is to be transferred to a light source driver;
• outputting, by each of the plurality of DDICs, the backlighting data generated by the respective DDIC based on the ordering information and a backlighting data synchronization signal;
• and
• driving the plurality of light sources based on the backlighting data for the plurality of regions output from the plurality of DDICs:
• wherein the method further comprises:
• storing the sequence numbers for the respective light sources in an ordering information memory of each of the plurality of DDICs;
• storing, by an address memory of each of the plurality of DDICs, addresses of the sequence numbers in the ordering information memory;
• and
• retrieving the sequence numbers from the ordering information memory using the stored addresses in each of the plurality of DDICs.