Liquid　crystal　(LC)　is　an　intermediate　state　compound　between　liquid　and　crystal,　which　has　the　anisotropy　of　crystal　molecules　while　having　the　fluidity　of　liquid.　It　is　a　cutting-edge　technology　in　optoelectronics.　LC　lens　is　an　electrically　controlled　focusable　gradient　refractive　index　lens.　In　light　field　displays,　LC　lenses　with　diameters　in　the　millimetre　range　can　cover　more　areas.　Therefore,　we　propose　a　large　aperture　(LA)　liquid　crystal　(LC)　lens　with　an　electrically　controlled　focal　length　of　4　mm　in　diameter.　LC　lenses　with　large　apertures　require　large　voltages　and　there　are　certain　safety　issues　and　equipment　requirements.　We　have　therefore　utilised　a　triboelectric　nanogenerator　(TENG)　that　can　harvest　energy　from　the　environment　and　convert　it　into　usable　electrical　energy.　TENG　has　the　advantages　of　being　small　and　portable　and　enables　the　use　of　renewable　energy.　In　this　paper,　we　propose　a　new　type　of　feather　TENG　(F-TENG)　with　a　positive　friction　electrode　of　feathers　and　a　negative　electrode　of　polytetrafluoroethylene　(PTFE)　mixed　with　graphene,　which　enables　the　use　of　F-TENG　to　power　LC　lens　systems,　thus　providing　a　new　application　idea　for　the　display　field.　©　2023,　John　Wiley　and　Sons　Inc.　All　rights　reserved.