BACKGROUND

This disclosure relates generally to light emitting diodes (LEDs) and LED driver circuitry for a display, and more specifically to a display architecture with distributed driver circuits.

LEDs are used in many electronic display devices, such as televisions, computer monitors, laptop computers, tablets, smartphones, projection systems, and head-mounted devices. Modern displays may include large numbers of individual LEDs that may be arranged in rows and columns in a display area. In order to drive each LED, current methods employ driver circuitry that requires significant amounts of external chip area that impacts the size of the display device.

SUMMARY

In one embodiment, a display device comprises an array of light emitting diode zones each comprising one or more light emitting diodes that generate light in response to respective driver currents, a control circuit to generate driver control signals and address signals, and a group of driver circuits including a plurality of driver circuits. Each driver circuit in the group is configured to drive a respective light emitting diode zone from the array of light emitting zones by controlling a respective driver current responsive to all of the plurality of driver circuits operating in a first mode. Responsive to a first driver circuit from the plurality of driver circuits having a fault condition, a second driver circuit included in the plurality of driver circuits is switched to a second mode during which the second driver circuit is reconfigured to drive the faulty first driver circuit's respective light emitting diode zone.

In one embodiment, a driver circuit for a display device comprises a control logic to operate in a first mode responsive to all previous driver circuits in a group of driver circuits operating in the first mode, or operate in a second mode responsive to a previous driver circuit in the group having a fault condition. In the first mode the driver circuit is configured to drive a first light emitting diode zone included in an array of light emitting diode zones. In the second mode the driver circuit is reconfigured to drive a second light emitting diode zone that is adjacent to the first light emitting diode zone in the array.

