Dialog Semiconductor (UK) Limited

Sule Cetin

Sorin Laurentiu Negru

Parinda Mekara

An electrical current ('I') digital-to-analog converter ('IDAC') () supplies a specified electrical current to at least one light emitting diode. The IDAC () includes a plurality of current sources/sinks (): a. that are connected in parallel so a total amount of current flowing through the at least one LED equals the sum of their individual electrical currents; and b. at any instant in time individual current sources/sinks () are either: 1. turned on: or 2. turned off. When the specified electrical current being supplied exceeds a pre-established threshold (), a sequence of individual current sources/sinks () are turned on ever more quickly to produce a. non-linearly increasing electrical current. When the specified electrical current being supplied is below the pre-established current threshold (), the non-linearly increasing electrical current is supplied by an increasing number of additional current sources/sinks (), each additional current source/sink () producing progressively longer current pulses until that current source/sink {} remains fully on.

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Sule Cetin