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Lampshade was 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 the light sources, almost all light sources are still covered by lampshade to arrange or control lumi...
Citations
... Reference [10] is of the view that, by using the Shape Semantics, bamboo lampshades can show spiritual and cultural connotation and humanistic care better with its shape. Reference [11] used lampshades significantly in their study to evaluate how shape, bump texture and colour temperature are affected on impression of people of varied origin. This experiment was conducted with Danish students using lamp-shades as a key instrument. ...
... Both people like diffusely transmitted light than dazzling and bright light, and also like a gradation of light and shadow. To make sure preference of lampshade by Danish people, Odaka et al. [1] had performed the impression evaluation experiment for Danish students using paper folding lampshade of various shapes and colors temperatures. To examine similarities and differences in Japanese and Danish impression evaluation, almost the same experiment was conducted with Japanese students. ...
... Authors fabricated several lamp shades considering the experiments by Odaka et al. [1]. The shapes adopted were including PCCP (Pseudo-Cylindrical Concave Polyhedral) shell and the transformations of the shell. ...
... Authors experimented on this study for Japanese based on the subject experiment performed by Odaka et al. [1] in Denmark. 27 Aarhus University students (men and women) in its twenties participated in the subject experiment for Danish. ...
The historical and cultural background in Japan and Denmark is significantly different , however, they are sharing some common points in the delicate sensitivity to the light. Both people like diffusely transmitted light than dazzling and bright light, and also like a gradation of light and shadow. To make sure preference of lampshade by Danish people, the impression evaluation experiment for Danish students using paper folding lampshade of various shapes and colors temperatures had been performed. To examine similarities and differences in Japanese and Danish impression evaluation, almost the same experiment was conducted with Japanese students.
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. Until now, paper folding method ‘SQEF’ (Skew Quadrilateral Elastic Folding) was proposed to construct shapes with non-flat texture in the field of lampshade design. With SQEF methods, final shape is constructed by skew quadrilateral unit with a curved surface. As each skew quadrilateral unit is composed by continuously curved surface, luminance distribution within each unit is continuous as well. The shapes of section appeared in proposed lampshades are convex and curved surface in each unit is concave. The purpose of the research described in this paper is expansion of the horizontal sections of lampshades to nonconvex shape to generate convex unit. The buffer part was inserted between concave parts to combine them. An example of the lampshade including concave parts was manufactured. And finally, luminance distribution on the lampshade was examined.
In the field of lampshade design, paper folding method has been highly utilized as the non-flat texture by paper folding method can generate beautiful luminance distribution. Especially, if the non-flat texture is composed of curved surface units, luminance distribution in the units is continuous and visually soft. And the method combining non-flat pattern and geometrical transmittance pattern has been already proposed to overlap luminance distribution caused by non-flat texture and that by transmittance pattern. In this paper, plane tessellations are introduced to expand diversity of lampshade design. Two methods were proposed with single tessellation and multiple tessellations. With single tessellation method, a tessellation was used for both paper folding and geometrical transmittance pattern. With multiple tessellation method, multiple tessellations were used for paper folding and geometrical transmittance pattern respectively. To verify the effect of the combination, lampshades with non-flat texture and geometrical transmittance pattern were manufactured and brightness distributions of them were measured.
