Design and fabrication of semi-transparent screen based on micro-patterns for direct-view type head-up display in automobiles

Jae Yong Lee, Hyo Jun Kim, Young Joo Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)


A semi-transparent screen with hemisphere micro-patterns was proposed and designed to enhance the brightness uniformity of the display image toward the driver for a direct-view type head-up display. The hemisphere micro-patterns were designed to consider the inclined angle of the windshield for efficient reflection and scattering toward to the driver. The density and radius of the hemisphere micro-patterns were adjusted as a function of position on the screen based on the geometrical calculation and analyzed by the commercial optical simulation tool based on a ray-tracing method. The designed hemisphere micro-patterns was fabricated by the thermal reflow method and evaluated to confirm the uniform illumination. From the results, the semi-transparent screen with variable micro-patterns shows the 91.9 % of brightness uniformity with the enhanced luminance compare to a screen without micro-patterns. A luminance of fabricated screen also shows good agreement with the simulation result to reflect the clear and bright driving information to the driver.

Original languageEnglish
Pages (from-to)133-140
Number of pages8
JournalOptical Review
Issue number1
Publication statusPublished - 2016 Feb 1


All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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