THE LAMPSHADE DESIGN MAKING USE OF GEOMETRIC FORMS: THE LAMPSHADE FORM BASED ON FOUR-DIMNSIONAL POLYTOPE WITH TENSEGRITY STRUCTURE: O DESIGN DE ABAJURES COMPOSTOS POR FORMAS GEOMÉTRICAS: A FORMA DE ABAJURES BASEADA EM POLITOPOS TETRADIMENSIONAIS COM ESTRUTURA DE TENSEGRIDADE

Lampshades were developed as wind shield for light source when fire was used for light source. Though contemporary light sources, like LED lamp, fluorescent lamp, and incandescent light, are working with electricity and wind shield is not required for light source, almost all light sources are still covered by lampshade to arrange or control luminous flux from light source. And combination of lampshades and light sources may give distinctive impression to surrounding people. The geometric forms play a significant role in the design of lampshades. In this paper, author introduced the idea of ​​a form by 3D projection of a 4D form including a tensegrity structure, and tried to design a new type of lampshade.