Flexible　thermoelectric　generators　have　attracted　a　tremendous　amount　of　attention　as　they　enable　waste　heat　recovery　in　a　wide　range　of　applications　ranging　from　flexible　displays　to　biomedical　devices.　However,　design　limitations　still　exist　in　flexible　micro　thermoelectric　generators,　in　particular　for　applications　with　a　heat　source　array　such　as　in　flexible　micro-light-emitting　diodes.　Hence,　this　paper　proposes　a　thin　film　flexible　annular　thermoelectric　generator　design　that　specifically　aims　for　heat　recycling　in　flexible　micro-light-emitting　diodes　for　the　first　time.　In　order　to　evaluate　the　generator　performance,　a　three-dimensional　steady-state　model　is　constructed　and　a　systematic　study　on　design　parameters　is　carried　out　based　on　the　finite　element　method.　The　model　first　takes　into　account　the　heat　transfer　from　a　heat　source　array　to　the　thermocouples.　Seebeck,　Peltier,　as　well　as　Joule　heating　effects,　are　then　considered　to　evaluate　the　specific　power　density　of　the　generator.　Additionally,　critical　design　parameters　including　thermocouple　structural　dimensions,　thermocouple　numbers,　and　substrate　thickness　have　been　thoroughly　investigated.　After　model　validation　using　experimental　data　from　the　literature,　the　results　show　that　the　relationship　between　the　thermocouple　design　parameters　and　the　output　power　is　nonmonotonic　and　for　each　parameter,　a　certain　optimum　range　can　be　found,　in　which　the　obtained　output　power　does　not　vary　significantly　(within　95%　of　the　maximum　output　power　Pmax).　The　thickness　of　the　flexible　substrate　is　inversely　correlated　to　the　output　power.　Moreover,　the　metallic　thermocouples　serve　as　a　heat　sink　that　helps　to　lower　the　temperature　of　the　active　region　by　∼　3　°C.　Overall,　the　model　predicts　an　impressive　specific　power　density　of　∼　40　µW/cm2.K2,　thus　demonstrating　the　potential　applicability　of　using　flexible　thermoelectric　generators　to　recycle　heat　from　micro-light-emitting　diodes　while　providing　a　path　to　further　improve　the　performance　of　flexible　thermoelectric　generators.　©　2021　Elsevier　Ltd