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LC GRIN lens mode with wide viewing angle for rotatable 2D/3D tablet
Author(s) -
Kashiwagi Masako,
Uehara Shinichi,
Takagi Ayako,
Baba Masahiro
Publication year - 2014
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1002/jsid.213
Subject(s) - azimuth , optics , lens (geology) , luminance , viewing angle , orientation (vector space) , tracking (education) , liquid crystal display , computer science , optical axis , materials science , physics , geometry , pedagogy , mathematics , psychology
To widen the vertical and horizontal angular ranges where the lens performs well, the off‐axis performance of a liquid crystal gradient index (LC GRIN) lens is analyzed by the combined simulation system of an LC director simulator and a ray‐tracing simulator. We found that the angular difference between an LC alignment direction and an electrode array direction of the LC GRIN lens is one of significant parameters, and detailed conditions of structure are established. The measurement result shows that the developed structure reduces the degradation ratio in a luminance profile from 61% to 3.2%. We have applied a user tracking system for the rotatable 3D display, equipped with a detection of a panel orientation and a face position. As a result, we have developed a rotatable 2D/3D tablet whose 3D viewing azimuth angle is over 30° in both landscape and portrait orientations.