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57.1: Directional BLU for Full Resolution Field Alternative Auto‐Stereoscopic 3D/2D and 2D/3D LCDs
Author(s) -
Käläntär Kälil K.
Publication year - 2014
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/j.2168-0159.2014.tb00219.x
Subject(s) - backlight , autostereoscopy , liquid crystal display , stereoscopy , stereo display , isosceles triangle , optics , laptop , light guide , 3d printed , computer science , resolution (logic) , materials science , computer graphics (images) , artificial intelligence , physics , engineering , mathematics , light source , geometry , biomedical engineering , operating system
Switching directional backlight units (BLUs) were designed and prototyped for full resolution field alternative autostereoscopic 3D liquid crystal displays (LCDs). The inherent switching characteristic of the backlight unit (BLU) in which two confronting illuminating light sources were mounted on the sides of a light‐guide plate (LGP), was applied to build 2D into 3D and 3D into 2D in the LCDs. The design based on 2D concept required a uniform bilateral prismatic structure with a cross section of isosceles triangle on the back surface of the functional LGP. The structure of bilateral‐prismatic LGP and two confronting illuminating sides led to an increase in double uniformity, i. e. for doubleside illuminations, and a decrease in single uniformity, i. e. for single side illumination (2D as primary function of the display; 2D/3D). However, a design that was based on 3D concept required angle gradation for the unilateral prisms on the back surface of the functional LGP that led to an increase in single uniformity and a decrease in double uniformity (3D as primary function of the display; 3D/2D). Both switching concepts were used to display 3D and 2D on LCDs of small size handheld game devices and still cameras.