Self-luminous　projection　technologies,　such　as　Micro-　LED　chips,　compared　with　traditional　projection　methods,　does　not　require　complex　lighting　path.　So　it　can　significantly　improve　light　utilization　rate　and　reduce　costs.　However,　technical　challenges　in　Micro-LED　chip　production　make　it　difficult　to　improve　the　chip＇s　resolution　further.　Some　studies　have　shown　that　compared　with　the　original　image　resolution　of　the　spatial　light　modulator　(SLM),　the　projection　images　overlapped　is　an　effective　method　to　improve　the　resolution　of　the　projector.　In　this　paper,　we　study　the　working　principle　of　the　extended　pixel　resolution　actuator　and　propose　a　self-luminous　projection　resolution　enhancement　system　based　on　Micro-LED　chip.　It　can　improve　the　resolution　of　the　projection　images　with　the　resolution　of　the　Micro-LED　chip　unchanged.　The　resolution　enhancement　system　consists　of　a　Micro-LED　chip,　an　extended　pixel　resolution　actuator　and　a　projection　lens.　According　to　the　working　principle　of　the　extended　pixel　resolution　actuator,　the　projection　lens　is　an　image-space　telecentric　structure,　in　which　modulation　transfer　function　of　projection　imaging　at　Nyquist　frequency　100　lp/mm　is　greater　than　0.4.　Finally,　the　tolerance　analysis　on　the　projection　lens　is　completed.　The　results　show　that　the　projection　lens　has　a　high　success　rate　in　processing.　This　work　is　of　great　significance　for　improving　the　resolution　of　Micro-LED　self-luminous　projection　images.　©　2024　John　Wiley　and　Sons　Inc.　All　rights　reserved.